diff --git a/.gitignore b/.gitignore
index 3275ff833..c3ddb85ab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,11 @@
 .gradle/
 
 **/build/*
+<<<<<<< HEAD
 !**/avro-fastserde-tests111/build/codegen
+=======
+!**/build/codegen
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 
 #temp artifacts
 avro_tools/
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
new file mode 100644
index 000000000..30e63ddfa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_BOOLEAN_GenericDeserializer_869749973_869749973
+    implements FastDeserializer<List<Boolean>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_BOOLEAN_GenericDeserializer_869749973_869749973(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveBooleanList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveBooleanList) {
+            array0 = ((PrimitiveBooleanList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveBooleanArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
new file mode 100644
index 000000000..13cf522ed
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_DOUBLE_GenericDeserializer_18760307_18760307
+    implements FastDeserializer<List<Double>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_DOUBLE_GenericDeserializer_18760307_18760307(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Double> deserialize(List<Double> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveDoubleList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveDoubleList) {
+            array0 = ((PrimitiveDoubleList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveDoubleArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
new file mode 100644
index 000000000..32042e583
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
@@ -0,0 +1,31 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_FLOAT_GenericDeserializer_1012670397_1012670397
+    implements FastDeserializer<List<Float>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_FLOAT_GenericDeserializer_1012670397_1012670397(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Float> deserialize(List<Float> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveFloatList array0 = null;
+        array0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray((reuse), (decoder)));
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_INT_GenericDeserializer_1012089072_1012089072.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
new file mode 100644
index 000000000..6812b5037
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_INT_GenericDeserializer_1012089072_1012089072
+    implements FastDeserializer<List<Integer>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_INT_GenericDeserializer_1012089072_1012089072(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Integer> deserialize(List<Integer> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveIntList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveIntList) {
+            array0 = ((PrimitiveIntList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_LONG_GenericDeserializer_325099267_325099267.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_LONG_GenericDeserializer_325099267_325099267.java
new file mode 100644
index 000000000..d18ef62fe
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_LONG_GenericDeserializer_325099267_325099267.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_LONG_GenericDeserializer_325099267_325099267
+    implements FastDeserializer<List<Long>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_LONG_GenericDeserializer_325099267_325099267(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Long> deserialize(List<Long> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveLongList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveLongList) {
+            array0 = ((PrimitiveLongList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveLongArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
new file mode 100644
index 000000000..b244ecb2a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
@@ -0,0 +1,1106 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_UNION_GenericDeserializer_777827233_777827233.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_UNION_GenericDeserializer_777827233_777827233.java
new file mode 100644
index 000000000..d03cf8c83
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_UNION_GenericDeserializer_777827233_777827233.java
@@ -0,0 +1,98 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericDeserializer_777827233_777827233
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema arrayElemOptionSchema0;
+    private final Schema field0;
+
+    public Array_of_UNION_GenericDeserializer_777827233_777827233(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.arrayElemOptionSchema0 = arrayArrayElemSchema0 .getTypes().get(1);
+        this.field0 = arrayElemOptionSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayElemOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayElemOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
new file mode 100644
index 000000000..9fb7e52b0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
@@ -0,0 +1,1116 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_SpecificDeserializer_1277939469_1277939469
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_UNION_SpecificDeserializer_1277939469_1277939469(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_record_GenericDeserializer_1606337179_2018567528.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_record_GenericDeserializer_1606337179_2018567528.java
new file mode 100644
index 000000000..5afe31b4c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_record_GenericDeserializer_1606337179_2018567528.java
@@ -0,0 +1,76 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_record_GenericDeserializer_1606337179_2018567528
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionArrayElemSchema0;
+
+    public Array_of_record_GenericDeserializer_1606337179_2018567528(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionArrayElemSchema0 = readerSchema.getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                List<IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                if ((reuse) instanceof List) {
+                    unionOption0 = ((List)(reuse));
+                    if (unionOption0 instanceof GenericArray) {
+                        ((GenericArray) unionOption0).reset();
+                    } else {
+                        unionOption0 .clear();
+                    }
+                } else {
+                    unionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object unionOptionArrayElementReuseVar0 = null;
+                        if ((reuse) instanceof GenericArray) {
+                            unionOptionArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                        }
+                        unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder), (customization)));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_record_GenericDeserializer_477614132_477614132.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_record_GenericDeserializer_477614132_477614132.java
new file mode 100644
index 000000000..ce770fe01
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Array_of_record_GenericDeserializer_477614132_477614132.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericDeserializer_477614132_477614132
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema field0;
+
+    public Array_of_record_GenericDeserializer_477614132_477614132(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.field0 = arrayArrayElemSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
new file mode 100644
index 000000000..45fe4b7d7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
@@ -0,0 +1,23040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema f00;
+    private final Schema f10;
+    private final Schema f20;
+    private final Schema f30;
+    private final Schema f40;
+    private final Schema f50;
+    private final Schema f60;
+    private final Schema f70;
+    private final Schema f80;
+    private final Schema f90;
+    private final Schema f100;
+    private final Schema f110;
+    private final Schema f120;
+    private final Schema f130;
+    private final Schema f140;
+    private final Schema f150;
+    private final Schema f160;
+    private final Schema f170;
+    private final Schema f180;
+    private final Schema f190;
+    private final Schema f200;
+    private final Schema f210;
+    private final Schema f220;
+    private final Schema f230;
+    private final Schema f240;
+    private final Schema f250;
+    private final Schema f260;
+    private final Schema f270;
+    private final Schema f280;
+    private final Schema f290;
+    private final Schema f300;
+    private final Schema f310;
+    private final Schema f320;
+    private final Schema f330;
+    private final Schema f340;
+    private final Schema f350;
+    private final Schema f360;
+    private final Schema f370;
+    private final Schema f380;
+    private final Schema f390;
+    private final Schema f400;
+    private final Schema f410;
+    private final Schema f420;
+    private final Schema f430;
+    private final Schema f440;
+    private final Schema f450;
+    private final Schema f460;
+    private final Schema f470;
+    private final Schema f480;
+    private final Schema f490;
+    private final Schema f500;
+    private final Schema f510;
+    private final Schema f520;
+    private final Schema f530;
+    private final Schema f540;
+    private final Schema f550;
+    private final Schema f560;
+    private final Schema f570;
+    private final Schema f580;
+    private final Schema f590;
+    private final Schema f600;
+    private final Schema f610;
+    private final Schema f620;
+    private final Schema f630;
+    private final Schema f640;
+    private final Schema f650;
+    private final Schema f660;
+    private final Schema f670;
+    private final Schema f680;
+    private final Schema f690;
+    private final Schema f700;
+    private final Schema f710;
+    private final Schema f720;
+    private final Schema f730;
+    private final Schema f740;
+    private final Schema f750;
+    private final Schema f760;
+    private final Schema f770;
+    private final Schema f780;
+    private final Schema f790;
+    private final Schema f800;
+    private final Schema f810;
+    private final Schema f820;
+    private final Schema f830;
+    private final Schema f840;
+    private final Schema f850;
+    private final Schema f860;
+    private final Schema f870;
+    private final Schema f880;
+    private final Schema f890;
+    private final Schema f900;
+    private final Schema f910;
+    private final Schema f920;
+    private final Schema f930;
+    private final Schema f940;
+    private final Schema f950;
+    private final Schema f960;
+    private final Schema f970;
+    private final Schema f980;
+    private final Schema f990;
+    private final Schema f1000;
+    private final Schema f1010;
+    private final Schema f1020;
+    private final Schema f1030;
+    private final Schema f1040;
+    private final Schema f1050;
+    private final Schema f1060;
+    private final Schema f1070;
+    private final Schema f1080;
+    private final Schema f1090;
+    private final Schema f1100;
+    private final Schema f1110;
+    private final Schema f1120;
+    private final Schema f1130;
+    private final Schema f1140;
+    private final Schema f1150;
+    private final Schema f1160;
+    private final Schema f1170;
+    private final Schema f1180;
+    private final Schema f1190;
+    private final Schema f1200;
+    private final Schema f1210;
+    private final Schema f1220;
+    private final Schema f1230;
+    private final Schema f1240;
+    private final Schema f1250;
+    private final Schema f1260;
+    private final Schema f1270;
+    private final Schema f1280;
+    private final Schema f1290;
+    private final Schema f1300;
+    private final Schema f1310;
+    private final Schema f1320;
+    private final Schema f1330;
+    private final Schema f1340;
+    private final Schema f1350;
+    private final Schema f1360;
+    private final Schema f1370;
+    private final Schema f1380;
+    private final Schema f1390;
+    private final Schema f1400;
+    private final Schema f1410;
+    private final Schema f1420;
+    private final Schema f1430;
+    private final Schema f1440;
+    private final Schema f1450;
+    private final Schema f1460;
+    private final Schema f1470;
+    private final Schema f1480;
+    private final Schema f1490;
+    private final Schema f1500;
+    private final Schema f1510;
+    private final Schema f1520;
+    private final Schema f1530;
+    private final Schema f1540;
+    private final Schema f1550;
+    private final Schema f1560;
+    private final Schema f1570;
+    private final Schema f1580;
+    private final Schema f1590;
+    private final Schema f1600;
+    private final Schema f1610;
+    private final Schema f1620;
+    private final Schema f1630;
+    private final Schema f1640;
+    private final Schema f1650;
+    private final Schema f1660;
+    private final Schema f1670;
+    private final Schema f1680;
+    private final Schema f1690;
+    private final Schema f1700;
+    private final Schema f1710;
+    private final Schema f1720;
+    private final Schema f1730;
+    private final Schema f1740;
+    private final Schema f1750;
+    private final Schema f1760;
+    private final Schema f1770;
+    private final Schema f1780;
+    private final Schema f1790;
+    private final Schema f1800;
+    private final Schema f1810;
+    private final Schema f1820;
+    private final Schema f1830;
+    private final Schema f1840;
+    private final Schema f1850;
+    private final Schema f1860;
+    private final Schema f1870;
+    private final Schema f1880;
+    private final Schema f1890;
+    private final Schema f1900;
+    private final Schema f1910;
+    private final Schema f1920;
+    private final Schema f1930;
+    private final Schema f1940;
+    private final Schema f1950;
+    private final Schema f1960;
+    private final Schema f1970;
+    private final Schema f1980;
+    private final Schema f1990;
+    private final Schema f2000;
+    private final Schema f2010;
+    private final Schema f2020;
+    private final Schema f2030;
+    private final Schema f2040;
+    private final Schema f2050;
+    private final Schema f2060;
+    private final Schema f2070;
+    private final Schema f2080;
+    private final Schema f2090;
+    private final Schema f2100;
+    private final Schema f2110;
+    private final Schema f2120;
+    private final Schema f2130;
+    private final Schema f2140;
+    private final Schema f2150;
+    private final Schema f2160;
+    private final Schema f2170;
+    private final Schema f2180;
+    private final Schema f2190;
+    private final Schema f2200;
+    private final Schema f2210;
+    private final Schema f2220;
+    private final Schema f2230;
+    private final Schema f2240;
+    private final Schema f2250;
+    private final Schema f2260;
+    private final Schema f2270;
+    private final Schema f2280;
+    private final Schema f2290;
+    private final Schema f2300;
+    private final Schema f2310;
+    private final Schema f2320;
+    private final Schema f2330;
+    private final Schema f2340;
+    private final Schema f2350;
+    private final Schema f2360;
+    private final Schema f2370;
+    private final Schema f2380;
+    private final Schema f2390;
+    private final Schema f2400;
+    private final Schema f2410;
+    private final Schema f2420;
+    private final Schema f2430;
+    private final Schema f2440;
+    private final Schema f2450;
+    private final Schema f2460;
+    private final Schema f2470;
+    private final Schema f2480;
+    private final Schema f2490;
+    private final Schema f2500;
+    private final Schema f2510;
+    private final Schema f2520;
+    private final Schema f2530;
+    private final Schema f2540;
+    private final Schema f2550;
+    private final Schema f2560;
+    private final Schema f2570;
+    private final Schema f2580;
+    private final Schema f2590;
+    private final Schema f2600;
+    private final Schema f2610;
+    private final Schema f2620;
+    private final Schema f2630;
+    private final Schema f2640;
+    private final Schema f2650;
+    private final Schema f2660;
+    private final Schema f2670;
+    private final Schema f2680;
+    private final Schema f2690;
+    private final Schema f2700;
+    private final Schema f2710;
+    private final Schema f2720;
+    private final Schema f2730;
+    private final Schema f2740;
+    private final Schema f2750;
+    private final Schema f2760;
+    private final Schema f2770;
+    private final Schema f2780;
+    private final Schema f2790;
+    private final Schema f2800;
+    private final Schema f2810;
+    private final Schema f2820;
+    private final Schema f2830;
+    private final Schema f2840;
+    private final Schema f2850;
+    private final Schema f2860;
+    private final Schema f2870;
+    private final Schema f2880;
+    private final Schema f2890;
+    private final Schema f2900;
+    private final Schema f2910;
+    private final Schema f2920;
+    private final Schema f2930;
+    private final Schema f2940;
+    private final Schema f2950;
+    private final Schema f2960;
+    private final Schema f2970;
+    private final Schema f2980;
+    private final Schema f2990;
+    private final Schema f3000;
+    private final Schema f3010;
+    private final Schema f3020;
+    private final Schema f3030;
+    private final Schema f3040;
+    private final Schema f3050;
+    private final Schema f3060;
+    private final Schema f3070;
+    private final Schema f3080;
+    private final Schema f3090;
+    private final Schema f3100;
+    private final Schema f3110;
+    private final Schema f3120;
+    private final Schema f3130;
+    private final Schema f3140;
+    private final Schema f3150;
+    private final Schema f3160;
+    private final Schema f3170;
+    private final Schema f3180;
+    private final Schema f3190;
+    private final Schema f3200;
+    private final Schema f3210;
+    private final Schema f3220;
+    private final Schema f3230;
+    private final Schema f3240;
+    private final Schema f3250;
+    private final Schema f3260;
+    private final Schema f3270;
+    private final Schema f3280;
+    private final Schema f3290;
+    private final Schema f3300;
+    private final Schema f3310;
+    private final Schema f3320;
+    private final Schema f3330;
+    private final Schema f3340;
+    private final Schema f3350;
+    private final Schema f3360;
+    private final Schema f3370;
+    private final Schema f3380;
+    private final Schema f3390;
+    private final Schema f3400;
+    private final Schema f3410;
+    private final Schema f3420;
+    private final Schema f3430;
+    private final Schema f3440;
+    private final Schema f3450;
+    private final Schema f3460;
+    private final Schema f3470;
+    private final Schema f3480;
+    private final Schema f3490;
+    private final Schema f3500;
+    private final Schema f3510;
+    private final Schema f3520;
+    private final Schema f3530;
+    private final Schema f3540;
+    private final Schema f3550;
+    private final Schema f3560;
+    private final Schema f3570;
+    private final Schema f3580;
+    private final Schema f3590;
+    private final Schema f3600;
+    private final Schema f3610;
+    private final Schema f3620;
+    private final Schema f3630;
+    private final Schema f3640;
+    private final Schema f3650;
+    private final Schema f3660;
+    private final Schema f3670;
+    private final Schema f3680;
+    private final Schema f3690;
+    private final Schema f3700;
+    private final Schema f3710;
+    private final Schema f3720;
+    private final Schema f3730;
+    private final Schema f3740;
+    private final Schema f3750;
+    private final Schema f3760;
+    private final Schema f3770;
+    private final Schema f3780;
+    private final Schema f3790;
+    private final Schema f3800;
+    private final Schema f3810;
+    private final Schema f3820;
+    private final Schema f3830;
+    private final Schema f3840;
+    private final Schema f3850;
+    private final Schema f3860;
+    private final Schema f3870;
+    private final Schema f3880;
+    private final Schema f3890;
+    private final Schema f3900;
+    private final Schema f3910;
+    private final Schema f3920;
+    private final Schema f3930;
+    private final Schema f3940;
+    private final Schema f3950;
+    private final Schema f3960;
+    private final Schema f3970;
+    private final Schema f3980;
+    private final Schema f3990;
+    private final Schema f4000;
+    private final Schema f4010;
+    private final Schema f4020;
+    private final Schema f4030;
+    private final Schema f4040;
+    private final Schema f4050;
+    private final Schema f4060;
+    private final Schema f4070;
+    private final Schema f4080;
+    private final Schema f4090;
+    private final Schema f4100;
+    private final Schema f4110;
+    private final Schema f4120;
+    private final Schema f4130;
+    private final Schema f4140;
+    private final Schema f4150;
+    private final Schema f4160;
+    private final Schema f4170;
+    private final Schema f4180;
+    private final Schema f4190;
+    private final Schema f4200;
+    private final Schema f4210;
+    private final Schema f4220;
+    private final Schema f4230;
+    private final Schema f4240;
+    private final Schema f4250;
+    private final Schema f4260;
+    private final Schema f4270;
+    private final Schema f4280;
+    private final Schema f4290;
+    private final Schema f4300;
+    private final Schema f4310;
+    private final Schema f4320;
+    private final Schema f4330;
+    private final Schema f4340;
+    private final Schema f4350;
+    private final Schema f4360;
+    private final Schema f4370;
+    private final Schema f4380;
+    private final Schema f4390;
+    private final Schema f4400;
+    private final Schema f4410;
+    private final Schema f4420;
+    private final Schema f4430;
+    private final Schema f4440;
+    private final Schema f4450;
+    private final Schema f4460;
+    private final Schema f4470;
+    private final Schema f4480;
+    private final Schema f4490;
+    private final Schema f4500;
+    private final Schema f4510;
+    private final Schema f4520;
+    private final Schema f4530;
+    private final Schema f4540;
+    private final Schema f4550;
+    private final Schema f4560;
+    private final Schema f4570;
+    private final Schema f4580;
+    private final Schema f4590;
+    private final Schema f4600;
+    private final Schema f4610;
+    private final Schema f4620;
+    private final Schema f4630;
+    private final Schema f4640;
+    private final Schema f4650;
+    private final Schema f4660;
+    private final Schema f4670;
+    private final Schema f4680;
+    private final Schema f4690;
+    private final Schema f4700;
+    private final Schema f4710;
+    private final Schema f4720;
+    private final Schema f4730;
+    private final Schema f4740;
+    private final Schema f4750;
+    private final Schema f4760;
+    private final Schema f4770;
+    private final Schema f4780;
+    private final Schema f4790;
+    private final Schema f4800;
+    private final Schema f4810;
+    private final Schema f4820;
+    private final Schema f4830;
+    private final Schema f4840;
+    private final Schema f4850;
+    private final Schema f4860;
+    private final Schema f4870;
+    private final Schema f4880;
+    private final Schema f4890;
+    private final Schema f4900;
+    private final Schema f4910;
+    private final Schema f4920;
+    private final Schema f4930;
+    private final Schema f4940;
+    private final Schema f4950;
+    private final Schema f4960;
+    private final Schema f4970;
+    private final Schema f4980;
+    private final Schema f4990;
+    private final Schema f5000;
+    private final Schema f5010;
+    private final Schema f5020;
+    private final Schema f5030;
+    private final Schema f5040;
+    private final Schema f5050;
+    private final Schema f5060;
+    private final Schema f5070;
+    private final Schema f5080;
+    private final Schema f5090;
+    private final Schema f5100;
+    private final Schema f5110;
+    private final Schema f5120;
+    private final Schema f5130;
+    private final Schema f5140;
+    private final Schema f5150;
+    private final Schema f5160;
+    private final Schema f5170;
+    private final Schema f5180;
+    private final Schema f5190;
+    private final Schema f5200;
+    private final Schema f5210;
+    private final Schema f5220;
+    private final Schema f5230;
+    private final Schema f5240;
+    private final Schema f5250;
+    private final Schema f5260;
+    private final Schema f5270;
+    private final Schema f5280;
+    private final Schema f5290;
+    private final Schema f5300;
+    private final Schema f5310;
+    private final Schema f5320;
+    private final Schema f5330;
+    private final Schema f5340;
+    private final Schema f5350;
+    private final Schema f5360;
+    private final Schema f5370;
+    private final Schema f5380;
+    private final Schema f5390;
+    private final Schema f5400;
+    private final Schema f5410;
+    private final Schema f5420;
+    private final Schema f5430;
+    private final Schema f5440;
+    private final Schema f5450;
+    private final Schema f5460;
+    private final Schema f5470;
+    private final Schema f5480;
+    private final Schema f5490;
+    private final Schema f5500;
+    private final Schema f5510;
+    private final Schema f5520;
+    private final Schema f5530;
+    private final Schema f5540;
+    private final Schema f5550;
+    private final Schema f5560;
+    private final Schema f5570;
+    private final Schema f5580;
+    private final Schema f5590;
+    private final Schema f5600;
+    private final Schema f5610;
+    private final Schema f5620;
+    private final Schema f5630;
+    private final Schema f5640;
+    private final Schema f5650;
+    private final Schema f5660;
+    private final Schema f5670;
+    private final Schema f5680;
+    private final Schema f5690;
+    private final Schema f5700;
+    private final Schema f5710;
+    private final Schema f5720;
+    private final Schema f5730;
+    private final Schema f5740;
+    private final Schema f5750;
+    private final Schema f5760;
+    private final Schema f5770;
+    private final Schema f5780;
+    private final Schema f5790;
+    private final Schema f5800;
+    private final Schema f5810;
+    private final Schema f5820;
+    private final Schema f5830;
+    private final Schema f5840;
+    private final Schema f5850;
+    private final Schema f5860;
+    private final Schema f5870;
+    private final Schema f5880;
+    private final Schema f5890;
+    private final Schema f5900;
+    private final Schema f5910;
+    private final Schema f5920;
+    private final Schema f5930;
+    private final Schema f5940;
+    private final Schema f5950;
+    private final Schema f5960;
+    private final Schema f5970;
+    private final Schema f5980;
+    private final Schema f5990;
+    private final Schema f6000;
+    private final Schema f6010;
+    private final Schema f6020;
+    private final Schema f6030;
+    private final Schema f6040;
+    private final Schema f6050;
+    private final Schema f6060;
+    private final Schema f6070;
+    private final Schema f6080;
+    private final Schema f6090;
+    private final Schema f6100;
+    private final Schema f6110;
+    private final Schema f6120;
+    private final Schema f6130;
+    private final Schema f6140;
+    private final Schema f6150;
+    private final Schema f6160;
+    private final Schema f6170;
+    private final Schema f6180;
+    private final Schema f6190;
+    private final Schema f6200;
+    private final Schema f6210;
+    private final Schema f6220;
+    private final Schema f6230;
+    private final Schema f6240;
+    private final Schema f6250;
+    private final Schema f6260;
+    private final Schema f6270;
+    private final Schema f6280;
+    private final Schema f6290;
+    private final Schema f6300;
+    private final Schema f6310;
+    private final Schema f6320;
+    private final Schema f6330;
+    private final Schema f6340;
+    private final Schema f6350;
+    private final Schema f6360;
+    private final Schema f6370;
+    private final Schema f6380;
+    private final Schema f6390;
+    private final Schema f6400;
+    private final Schema f6410;
+    private final Schema f6420;
+    private final Schema f6430;
+    private final Schema f6440;
+    private final Schema f6450;
+    private final Schema f6460;
+    private final Schema f6470;
+    private final Schema f6480;
+    private final Schema f6490;
+    private final Schema f6500;
+    private final Schema f6510;
+    private final Schema f6520;
+    private final Schema f6530;
+    private final Schema f6540;
+    private final Schema f6550;
+    private final Schema f6560;
+    private final Schema f6570;
+    private final Schema f6580;
+    private final Schema f6590;
+    private final Schema f6600;
+    private final Schema f6610;
+    private final Schema f6620;
+    private final Schema f6630;
+    private final Schema f6640;
+    private final Schema f6650;
+    private final Schema f6660;
+    private final Schema f6670;
+    private final Schema f6680;
+    private final Schema f6690;
+    private final Schema f6700;
+    private final Schema f6710;
+    private final Schema f6720;
+    private final Schema f6730;
+    private final Schema f6740;
+    private final Schema f6750;
+    private final Schema f6760;
+    private final Schema f6770;
+    private final Schema f6780;
+    private final Schema f6790;
+    private final Schema f6800;
+    private final Schema f6810;
+    private final Schema f6820;
+    private final Schema f6830;
+    private final Schema f6840;
+    private final Schema f6850;
+    private final Schema f6860;
+    private final Schema f6870;
+    private final Schema f6880;
+    private final Schema f6890;
+    private final Schema f6900;
+    private final Schema f6910;
+    private final Schema f6920;
+    private final Schema f6930;
+    private final Schema f6940;
+    private final Schema f6950;
+    private final Schema f6960;
+    private final Schema f6970;
+    private final Schema f6980;
+    private final Schema f6990;
+    private final Schema f7000;
+    private final Schema f7010;
+    private final Schema f7020;
+    private final Schema f7030;
+    private final Schema f7040;
+    private final Schema f7050;
+    private final Schema f7060;
+    private final Schema f7070;
+    private final Schema f7080;
+    private final Schema f7090;
+    private final Schema f7100;
+    private final Schema f7110;
+    private final Schema f7120;
+    private final Schema f7130;
+    private final Schema f7140;
+    private final Schema f7150;
+    private final Schema f7160;
+    private final Schema f7170;
+    private final Schema f7180;
+    private final Schema f7190;
+    private final Schema f7200;
+    private final Schema f7210;
+    private final Schema f7220;
+    private final Schema f7230;
+    private final Schema f7240;
+    private final Schema f7250;
+    private final Schema f7260;
+    private final Schema f7270;
+    private final Schema f7280;
+    private final Schema f7290;
+    private final Schema f7300;
+    private final Schema f7310;
+    private final Schema f7320;
+    private final Schema f7330;
+    private final Schema f7340;
+    private final Schema f7350;
+    private final Schema f7360;
+    private final Schema f7370;
+    private final Schema f7380;
+    private final Schema f7390;
+    private final Schema f7400;
+    private final Schema f7410;
+    private final Schema f7420;
+    private final Schema f7430;
+    private final Schema f7440;
+    private final Schema f7450;
+    private final Schema f7460;
+    private final Schema f7470;
+    private final Schema f7480;
+    private final Schema f7490;
+    private final Schema f7500;
+    private final Schema f7510;
+    private final Schema f7520;
+    private final Schema f7530;
+    private final Schema f7540;
+    private final Schema f7550;
+    private final Schema f7560;
+    private final Schema f7570;
+    private final Schema f7580;
+    private final Schema f7590;
+    private final Schema f7600;
+    private final Schema f7610;
+    private final Schema f7620;
+    private final Schema f7630;
+    private final Schema f7640;
+    private final Schema f7650;
+    private final Schema f7660;
+    private final Schema f7670;
+    private final Schema f7680;
+    private final Schema f7690;
+    private final Schema f7700;
+    private final Schema f7710;
+    private final Schema f7720;
+    private final Schema f7730;
+    private final Schema f7740;
+    private final Schema f7750;
+    private final Schema f7760;
+    private final Schema f7770;
+    private final Schema f7780;
+    private final Schema f7790;
+    private final Schema f7800;
+    private final Schema f7810;
+    private final Schema f7820;
+    private final Schema f7830;
+    private final Schema f7840;
+    private final Schema f7850;
+    private final Schema f7860;
+    private final Schema f7870;
+    private final Schema f7880;
+    private final Schema f7890;
+    private final Schema f7900;
+    private final Schema f7910;
+    private final Schema f7920;
+    private final Schema f7930;
+    private final Schema f7940;
+    private final Schema f7950;
+    private final Schema f7960;
+    private final Schema f7970;
+    private final Schema f7980;
+    private final Schema f7990;
+    private final Schema f8000;
+    private final Schema f8010;
+    private final Schema f8020;
+    private final Schema f8030;
+    private final Schema f8040;
+    private final Schema f8050;
+    private final Schema f8060;
+    private final Schema f8070;
+    private final Schema f8080;
+    private final Schema f8090;
+    private final Schema f8100;
+    private final Schema f8110;
+    private final Schema f8120;
+    private final Schema f8130;
+    private final Schema f8140;
+    private final Schema f8150;
+    private final Schema f8160;
+    private final Schema f8170;
+    private final Schema f8180;
+    private final Schema f8190;
+    private final Schema f8200;
+    private final Schema f8210;
+    private final Schema f8220;
+    private final Schema f8230;
+    private final Schema f8240;
+    private final Schema f8250;
+    private final Schema f8260;
+    private final Schema f8270;
+    private final Schema f8280;
+    private final Schema f8290;
+    private final Schema f8300;
+    private final Schema f8310;
+    private final Schema f8320;
+    private final Schema f8330;
+    private final Schema f8340;
+    private final Schema f8350;
+    private final Schema f8360;
+    private final Schema f8370;
+    private final Schema f8380;
+    private final Schema f8390;
+    private final Schema f8400;
+    private final Schema f8410;
+    private final Schema f8420;
+    private final Schema f8430;
+    private final Schema f8440;
+    private final Schema f8450;
+    private final Schema f8460;
+    private final Schema f8470;
+    private final Schema f8480;
+    private final Schema f8490;
+    private final Schema f8500;
+    private final Schema f8510;
+    private final Schema f8520;
+    private final Schema f8530;
+    private final Schema f8540;
+    private final Schema f8550;
+    private final Schema f8560;
+    private final Schema f8570;
+    private final Schema f8580;
+    private final Schema f8590;
+    private final Schema f8600;
+    private final Schema f8610;
+    private final Schema f8620;
+    private final Schema f8630;
+    private final Schema f8640;
+    private final Schema f8650;
+    private final Schema f8660;
+    private final Schema f8670;
+    private final Schema f8680;
+    private final Schema f8690;
+    private final Schema f8700;
+    private final Schema f8710;
+    private final Schema f8720;
+    private final Schema f8730;
+    private final Schema f8740;
+    private final Schema f8750;
+    private final Schema f8760;
+    private final Schema f8770;
+    private final Schema f8780;
+    private final Schema f8790;
+    private final Schema f8800;
+    private final Schema f8810;
+    private final Schema f8820;
+    private final Schema f8830;
+    private final Schema f8840;
+    private final Schema f8850;
+    private final Schema f8860;
+    private final Schema f8870;
+    private final Schema f8880;
+    private final Schema f8890;
+    private final Schema f8900;
+    private final Schema f8910;
+    private final Schema f8920;
+    private final Schema f8930;
+    private final Schema f8940;
+    private final Schema f8950;
+    private final Schema f8960;
+    private final Schema f8970;
+    private final Schema f8980;
+    private final Schema f8990;
+    private final Schema f9000;
+    private final Schema f9010;
+    private final Schema f9020;
+    private final Schema f9030;
+    private final Schema f9040;
+    private final Schema f9050;
+    private final Schema f9060;
+    private final Schema f9070;
+    private final Schema f9080;
+    private final Schema f9090;
+    private final Schema f9100;
+    private final Schema f9110;
+    private final Schema f9120;
+    private final Schema f9130;
+    private final Schema f9140;
+    private final Schema f9150;
+    private final Schema f9160;
+    private final Schema f9170;
+    private final Schema f9180;
+    private final Schema f9190;
+    private final Schema f9200;
+    private final Schema f9210;
+    private final Schema f9220;
+    private final Schema f9230;
+    private final Schema f9240;
+    private final Schema f9250;
+    private final Schema f9260;
+    private final Schema f9270;
+    private final Schema f9280;
+    private final Schema f9290;
+    private final Schema f9300;
+    private final Schema f9310;
+    private final Schema f9320;
+    private final Schema f9330;
+    private final Schema f9340;
+    private final Schema f9350;
+    private final Schema f9360;
+    private final Schema f9370;
+    private final Schema f9380;
+    private final Schema f9390;
+    private final Schema f9400;
+    private final Schema f9410;
+    private final Schema f9420;
+    private final Schema f9430;
+    private final Schema f9440;
+    private final Schema f9450;
+    private final Schema f9460;
+    private final Schema f9470;
+    private final Schema f9480;
+    private final Schema f9490;
+    private final Schema f9500;
+    private final Schema f9510;
+    private final Schema f9520;
+    private final Schema f9530;
+    private final Schema f9540;
+    private final Schema f9550;
+    private final Schema f9560;
+    private final Schema f9570;
+    private final Schema f9580;
+    private final Schema f9590;
+    private final Schema f9600;
+    private final Schema f9610;
+    private final Schema f9620;
+    private final Schema f9630;
+    private final Schema f9640;
+    private final Schema f9650;
+    private final Schema f9660;
+    private final Schema f9670;
+    private final Schema f9680;
+    private final Schema f9690;
+    private final Schema f9700;
+    private final Schema f9710;
+    private final Schema f9720;
+    private final Schema f9730;
+    private final Schema f9740;
+    private final Schema f9750;
+    private final Schema f9760;
+    private final Schema f9770;
+    private final Schema f9780;
+    private final Schema f9790;
+    private final Schema f9800;
+    private final Schema f9810;
+    private final Schema f9820;
+    private final Schema f9830;
+    private final Schema f9840;
+    private final Schema f9850;
+    private final Schema f9860;
+    private final Schema f9870;
+    private final Schema f9880;
+    private final Schema f9890;
+    private final Schema f9900;
+    private final Schema f9910;
+    private final Schema f9920;
+    private final Schema f9930;
+    private final Schema f9940;
+    private final Schema f9950;
+    private final Schema f9960;
+    private final Schema f9970;
+    private final Schema f9980;
+    private final Schema f9990;
+
+    public FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.f00 = readerSchema.getField("F0").schema();
+        this.f10 = readerSchema.getField("F1").schema();
+        this.f20 = readerSchema.getField("F2").schema();
+        this.f30 = readerSchema.getField("F3").schema();
+        this.f40 = readerSchema.getField("F4").schema();
+        this.f50 = readerSchema.getField("F5").schema();
+        this.f60 = readerSchema.getField("F6").schema();
+        this.f70 = readerSchema.getField("F7").schema();
+        this.f80 = readerSchema.getField("F8").schema();
+        this.f90 = readerSchema.getField("F9").schema();
+        this.f100 = readerSchema.getField("F10").schema();
+        this.f110 = readerSchema.getField("F11").schema();
+        this.f120 = readerSchema.getField("F12").schema();
+        this.f130 = readerSchema.getField("F13").schema();
+        this.f140 = readerSchema.getField("F14").schema();
+        this.f150 = readerSchema.getField("F15").schema();
+        this.f160 = readerSchema.getField("F16").schema();
+        this.f170 = readerSchema.getField("F17").schema();
+        this.f180 = readerSchema.getField("F18").schema();
+        this.f190 = readerSchema.getField("F19").schema();
+        this.f200 = readerSchema.getField("F20").schema();
+        this.f210 = readerSchema.getField("F21").schema();
+        this.f220 = readerSchema.getField("F22").schema();
+        this.f230 = readerSchema.getField("F23").schema();
+        this.f240 = readerSchema.getField("F24").schema();
+        this.f250 = readerSchema.getField("F25").schema();
+        this.f260 = readerSchema.getField("F26").schema();
+        this.f270 = readerSchema.getField("F27").schema();
+        this.f280 = readerSchema.getField("F28").schema();
+        this.f290 = readerSchema.getField("F29").schema();
+        this.f300 = readerSchema.getField("F30").schema();
+        this.f310 = readerSchema.getField("F31").schema();
+        this.f320 = readerSchema.getField("F32").schema();
+        this.f330 = readerSchema.getField("F33").schema();
+        this.f340 = readerSchema.getField("F34").schema();
+        this.f350 = readerSchema.getField("F35").schema();
+        this.f360 = readerSchema.getField("F36").schema();
+        this.f370 = readerSchema.getField("F37").schema();
+        this.f380 = readerSchema.getField("F38").schema();
+        this.f390 = readerSchema.getField("F39").schema();
+        this.f400 = readerSchema.getField("F40").schema();
+        this.f410 = readerSchema.getField("F41").schema();
+        this.f420 = readerSchema.getField("F42").schema();
+        this.f430 = readerSchema.getField("F43").schema();
+        this.f440 = readerSchema.getField("F44").schema();
+        this.f450 = readerSchema.getField("F45").schema();
+        this.f460 = readerSchema.getField("F46").schema();
+        this.f470 = readerSchema.getField("F47").schema();
+        this.f480 = readerSchema.getField("F48").schema();
+        this.f490 = readerSchema.getField("F49").schema();
+        this.f500 = readerSchema.getField("F50").schema();
+        this.f510 = readerSchema.getField("F51").schema();
+        this.f520 = readerSchema.getField("F52").schema();
+        this.f530 = readerSchema.getField("F53").schema();
+        this.f540 = readerSchema.getField("F54").schema();
+        this.f550 = readerSchema.getField("F55").schema();
+        this.f560 = readerSchema.getField("F56").schema();
+        this.f570 = readerSchema.getField("F57").schema();
+        this.f580 = readerSchema.getField("F58").schema();
+        this.f590 = readerSchema.getField("F59").schema();
+        this.f600 = readerSchema.getField("F60").schema();
+        this.f610 = readerSchema.getField("F61").schema();
+        this.f620 = readerSchema.getField("F62").schema();
+        this.f630 = readerSchema.getField("F63").schema();
+        this.f640 = readerSchema.getField("F64").schema();
+        this.f650 = readerSchema.getField("F65").schema();
+        this.f660 = readerSchema.getField("F66").schema();
+        this.f670 = readerSchema.getField("F67").schema();
+        this.f680 = readerSchema.getField("F68").schema();
+        this.f690 = readerSchema.getField("F69").schema();
+        this.f700 = readerSchema.getField("F70").schema();
+        this.f710 = readerSchema.getField("F71").schema();
+        this.f720 = readerSchema.getField("F72").schema();
+        this.f730 = readerSchema.getField("F73").schema();
+        this.f740 = readerSchema.getField("F74").schema();
+        this.f750 = readerSchema.getField("F75").schema();
+        this.f760 = readerSchema.getField("F76").schema();
+        this.f770 = readerSchema.getField("F77").schema();
+        this.f780 = readerSchema.getField("F78").schema();
+        this.f790 = readerSchema.getField("F79").schema();
+        this.f800 = readerSchema.getField("F80").schema();
+        this.f810 = readerSchema.getField("F81").schema();
+        this.f820 = readerSchema.getField("F82").schema();
+        this.f830 = readerSchema.getField("F83").schema();
+        this.f840 = readerSchema.getField("F84").schema();
+        this.f850 = readerSchema.getField("F85").schema();
+        this.f860 = readerSchema.getField("F86").schema();
+        this.f870 = readerSchema.getField("F87").schema();
+        this.f880 = readerSchema.getField("F88").schema();
+        this.f890 = readerSchema.getField("F89").schema();
+        this.f900 = readerSchema.getField("F90").schema();
+        this.f910 = readerSchema.getField("F91").schema();
+        this.f920 = readerSchema.getField("F92").schema();
+        this.f930 = readerSchema.getField("F93").schema();
+        this.f940 = readerSchema.getField("F94").schema();
+        this.f950 = readerSchema.getField("F95").schema();
+        this.f960 = readerSchema.getField("F96").schema();
+        this.f970 = readerSchema.getField("F97").schema();
+        this.f980 = readerSchema.getField("F98").schema();
+        this.f990 = readerSchema.getField("F99").schema();
+        this.f1000 = readerSchema.getField("F100").schema();
+        this.f1010 = readerSchema.getField("F101").schema();
+        this.f1020 = readerSchema.getField("F102").schema();
+        this.f1030 = readerSchema.getField("F103").schema();
+        this.f1040 = readerSchema.getField("F104").schema();
+        this.f1050 = readerSchema.getField("F105").schema();
+        this.f1060 = readerSchema.getField("F106").schema();
+        this.f1070 = readerSchema.getField("F107").schema();
+        this.f1080 = readerSchema.getField("F108").schema();
+        this.f1090 = readerSchema.getField("F109").schema();
+        this.f1100 = readerSchema.getField("F110").schema();
+        this.f1110 = readerSchema.getField("F111").schema();
+        this.f1120 = readerSchema.getField("F112").schema();
+        this.f1130 = readerSchema.getField("F113").schema();
+        this.f1140 = readerSchema.getField("F114").schema();
+        this.f1150 = readerSchema.getField("F115").schema();
+        this.f1160 = readerSchema.getField("F116").schema();
+        this.f1170 = readerSchema.getField("F117").schema();
+        this.f1180 = readerSchema.getField("F118").schema();
+        this.f1190 = readerSchema.getField("F119").schema();
+        this.f1200 = readerSchema.getField("F120").schema();
+        this.f1210 = readerSchema.getField("F121").schema();
+        this.f1220 = readerSchema.getField("F122").schema();
+        this.f1230 = readerSchema.getField("F123").schema();
+        this.f1240 = readerSchema.getField("F124").schema();
+        this.f1250 = readerSchema.getField("F125").schema();
+        this.f1260 = readerSchema.getField("F126").schema();
+        this.f1270 = readerSchema.getField("F127").schema();
+        this.f1280 = readerSchema.getField("F128").schema();
+        this.f1290 = readerSchema.getField("F129").schema();
+        this.f1300 = readerSchema.getField("F130").schema();
+        this.f1310 = readerSchema.getField("F131").schema();
+        this.f1320 = readerSchema.getField("F132").schema();
+        this.f1330 = readerSchema.getField("F133").schema();
+        this.f1340 = readerSchema.getField("F134").schema();
+        this.f1350 = readerSchema.getField("F135").schema();
+        this.f1360 = readerSchema.getField("F136").schema();
+        this.f1370 = readerSchema.getField("F137").schema();
+        this.f1380 = readerSchema.getField("F138").schema();
+        this.f1390 = readerSchema.getField("F139").schema();
+        this.f1400 = readerSchema.getField("F140").schema();
+        this.f1410 = readerSchema.getField("F141").schema();
+        this.f1420 = readerSchema.getField("F142").schema();
+        this.f1430 = readerSchema.getField("F143").schema();
+        this.f1440 = readerSchema.getField("F144").schema();
+        this.f1450 = readerSchema.getField("F145").schema();
+        this.f1460 = readerSchema.getField("F146").schema();
+        this.f1470 = readerSchema.getField("F147").schema();
+        this.f1480 = readerSchema.getField("F148").schema();
+        this.f1490 = readerSchema.getField("F149").schema();
+        this.f1500 = readerSchema.getField("F150").schema();
+        this.f1510 = readerSchema.getField("F151").schema();
+        this.f1520 = readerSchema.getField("F152").schema();
+        this.f1530 = readerSchema.getField("F153").schema();
+        this.f1540 = readerSchema.getField("F154").schema();
+        this.f1550 = readerSchema.getField("F155").schema();
+        this.f1560 = readerSchema.getField("F156").schema();
+        this.f1570 = readerSchema.getField("F157").schema();
+        this.f1580 = readerSchema.getField("F158").schema();
+        this.f1590 = readerSchema.getField("F159").schema();
+        this.f1600 = readerSchema.getField("F160").schema();
+        this.f1610 = readerSchema.getField("F161").schema();
+        this.f1620 = readerSchema.getField("F162").schema();
+        this.f1630 = readerSchema.getField("F163").schema();
+        this.f1640 = readerSchema.getField("F164").schema();
+        this.f1650 = readerSchema.getField("F165").schema();
+        this.f1660 = readerSchema.getField("F166").schema();
+        this.f1670 = readerSchema.getField("F167").schema();
+        this.f1680 = readerSchema.getField("F168").schema();
+        this.f1690 = readerSchema.getField("F169").schema();
+        this.f1700 = readerSchema.getField("F170").schema();
+        this.f1710 = readerSchema.getField("F171").schema();
+        this.f1720 = readerSchema.getField("F172").schema();
+        this.f1730 = readerSchema.getField("F173").schema();
+        this.f1740 = readerSchema.getField("F174").schema();
+        this.f1750 = readerSchema.getField("F175").schema();
+        this.f1760 = readerSchema.getField("F176").schema();
+        this.f1770 = readerSchema.getField("F177").schema();
+        this.f1780 = readerSchema.getField("F178").schema();
+        this.f1790 = readerSchema.getField("F179").schema();
+        this.f1800 = readerSchema.getField("F180").schema();
+        this.f1810 = readerSchema.getField("F181").schema();
+        this.f1820 = readerSchema.getField("F182").schema();
+        this.f1830 = readerSchema.getField("F183").schema();
+        this.f1840 = readerSchema.getField("F184").schema();
+        this.f1850 = readerSchema.getField("F185").schema();
+        this.f1860 = readerSchema.getField("F186").schema();
+        this.f1870 = readerSchema.getField("F187").schema();
+        this.f1880 = readerSchema.getField("F188").schema();
+        this.f1890 = readerSchema.getField("F189").schema();
+        this.f1900 = readerSchema.getField("F190").schema();
+        this.f1910 = readerSchema.getField("F191").schema();
+        this.f1920 = readerSchema.getField("F192").schema();
+        this.f1930 = readerSchema.getField("F193").schema();
+        this.f1940 = readerSchema.getField("F194").schema();
+        this.f1950 = readerSchema.getField("F195").schema();
+        this.f1960 = readerSchema.getField("F196").schema();
+        this.f1970 = readerSchema.getField("F197").schema();
+        this.f1980 = readerSchema.getField("F198").schema();
+        this.f1990 = readerSchema.getField("F199").schema();
+        this.f2000 = readerSchema.getField("F200").schema();
+        this.f2010 = readerSchema.getField("F201").schema();
+        this.f2020 = readerSchema.getField("F202").schema();
+        this.f2030 = readerSchema.getField("F203").schema();
+        this.f2040 = readerSchema.getField("F204").schema();
+        this.f2050 = readerSchema.getField("F205").schema();
+        this.f2060 = readerSchema.getField("F206").schema();
+        this.f2070 = readerSchema.getField("F207").schema();
+        this.f2080 = readerSchema.getField("F208").schema();
+        this.f2090 = readerSchema.getField("F209").schema();
+        this.f2100 = readerSchema.getField("F210").schema();
+        this.f2110 = readerSchema.getField("F211").schema();
+        this.f2120 = readerSchema.getField("F212").schema();
+        this.f2130 = readerSchema.getField("F213").schema();
+        this.f2140 = readerSchema.getField("F214").schema();
+        this.f2150 = readerSchema.getField("F215").schema();
+        this.f2160 = readerSchema.getField("F216").schema();
+        this.f2170 = readerSchema.getField("F217").schema();
+        this.f2180 = readerSchema.getField("F218").schema();
+        this.f2190 = readerSchema.getField("F219").schema();
+        this.f2200 = readerSchema.getField("F220").schema();
+        this.f2210 = readerSchema.getField("F221").schema();
+        this.f2220 = readerSchema.getField("F222").schema();
+        this.f2230 = readerSchema.getField("F223").schema();
+        this.f2240 = readerSchema.getField("F224").schema();
+        this.f2250 = readerSchema.getField("F225").schema();
+        this.f2260 = readerSchema.getField("F226").schema();
+        this.f2270 = readerSchema.getField("F227").schema();
+        this.f2280 = readerSchema.getField("F228").schema();
+        this.f2290 = readerSchema.getField("F229").schema();
+        this.f2300 = readerSchema.getField("F230").schema();
+        this.f2310 = readerSchema.getField("F231").schema();
+        this.f2320 = readerSchema.getField("F232").schema();
+        this.f2330 = readerSchema.getField("F233").schema();
+        this.f2340 = readerSchema.getField("F234").schema();
+        this.f2350 = readerSchema.getField("F235").schema();
+        this.f2360 = readerSchema.getField("F236").schema();
+        this.f2370 = readerSchema.getField("F237").schema();
+        this.f2380 = readerSchema.getField("F238").schema();
+        this.f2390 = readerSchema.getField("F239").schema();
+        this.f2400 = readerSchema.getField("F240").schema();
+        this.f2410 = readerSchema.getField("F241").schema();
+        this.f2420 = readerSchema.getField("F242").schema();
+        this.f2430 = readerSchema.getField("F243").schema();
+        this.f2440 = readerSchema.getField("F244").schema();
+        this.f2450 = readerSchema.getField("F245").schema();
+        this.f2460 = readerSchema.getField("F246").schema();
+        this.f2470 = readerSchema.getField("F247").schema();
+        this.f2480 = readerSchema.getField("F248").schema();
+        this.f2490 = readerSchema.getField("F249").schema();
+        this.f2500 = readerSchema.getField("F250").schema();
+        this.f2510 = readerSchema.getField("F251").schema();
+        this.f2520 = readerSchema.getField("F252").schema();
+        this.f2530 = readerSchema.getField("F253").schema();
+        this.f2540 = readerSchema.getField("F254").schema();
+        this.f2550 = readerSchema.getField("F255").schema();
+        this.f2560 = readerSchema.getField("F256").schema();
+        this.f2570 = readerSchema.getField("F257").schema();
+        this.f2580 = readerSchema.getField("F258").schema();
+        this.f2590 = readerSchema.getField("F259").schema();
+        this.f2600 = readerSchema.getField("F260").schema();
+        this.f2610 = readerSchema.getField("F261").schema();
+        this.f2620 = readerSchema.getField("F262").schema();
+        this.f2630 = readerSchema.getField("F263").schema();
+        this.f2640 = readerSchema.getField("F264").schema();
+        this.f2650 = readerSchema.getField("F265").schema();
+        this.f2660 = readerSchema.getField("F266").schema();
+        this.f2670 = readerSchema.getField("F267").schema();
+        this.f2680 = readerSchema.getField("F268").schema();
+        this.f2690 = readerSchema.getField("F269").schema();
+        this.f2700 = readerSchema.getField("F270").schema();
+        this.f2710 = readerSchema.getField("F271").schema();
+        this.f2720 = readerSchema.getField("F272").schema();
+        this.f2730 = readerSchema.getField("F273").schema();
+        this.f2740 = readerSchema.getField("F274").schema();
+        this.f2750 = readerSchema.getField("F275").schema();
+        this.f2760 = readerSchema.getField("F276").schema();
+        this.f2770 = readerSchema.getField("F277").schema();
+        this.f2780 = readerSchema.getField("F278").schema();
+        this.f2790 = readerSchema.getField("F279").schema();
+        this.f2800 = readerSchema.getField("F280").schema();
+        this.f2810 = readerSchema.getField("F281").schema();
+        this.f2820 = readerSchema.getField("F282").schema();
+        this.f2830 = readerSchema.getField("F283").schema();
+        this.f2840 = readerSchema.getField("F284").schema();
+        this.f2850 = readerSchema.getField("F285").schema();
+        this.f2860 = readerSchema.getField("F286").schema();
+        this.f2870 = readerSchema.getField("F287").schema();
+        this.f2880 = readerSchema.getField("F288").schema();
+        this.f2890 = readerSchema.getField("F289").schema();
+        this.f2900 = readerSchema.getField("F290").schema();
+        this.f2910 = readerSchema.getField("F291").schema();
+        this.f2920 = readerSchema.getField("F292").schema();
+        this.f2930 = readerSchema.getField("F293").schema();
+        this.f2940 = readerSchema.getField("F294").schema();
+        this.f2950 = readerSchema.getField("F295").schema();
+        this.f2960 = readerSchema.getField("F296").schema();
+        this.f2970 = readerSchema.getField("F297").schema();
+        this.f2980 = readerSchema.getField("F298").schema();
+        this.f2990 = readerSchema.getField("F299").schema();
+        this.f3000 = readerSchema.getField("F300").schema();
+        this.f3010 = readerSchema.getField("F301").schema();
+        this.f3020 = readerSchema.getField("F302").schema();
+        this.f3030 = readerSchema.getField("F303").schema();
+        this.f3040 = readerSchema.getField("F304").schema();
+        this.f3050 = readerSchema.getField("F305").schema();
+        this.f3060 = readerSchema.getField("F306").schema();
+        this.f3070 = readerSchema.getField("F307").schema();
+        this.f3080 = readerSchema.getField("F308").schema();
+        this.f3090 = readerSchema.getField("F309").schema();
+        this.f3100 = readerSchema.getField("F310").schema();
+        this.f3110 = readerSchema.getField("F311").schema();
+        this.f3120 = readerSchema.getField("F312").schema();
+        this.f3130 = readerSchema.getField("F313").schema();
+        this.f3140 = readerSchema.getField("F314").schema();
+        this.f3150 = readerSchema.getField("F315").schema();
+        this.f3160 = readerSchema.getField("F316").schema();
+        this.f3170 = readerSchema.getField("F317").schema();
+        this.f3180 = readerSchema.getField("F318").schema();
+        this.f3190 = readerSchema.getField("F319").schema();
+        this.f3200 = readerSchema.getField("F320").schema();
+        this.f3210 = readerSchema.getField("F321").schema();
+        this.f3220 = readerSchema.getField("F322").schema();
+        this.f3230 = readerSchema.getField("F323").schema();
+        this.f3240 = readerSchema.getField("F324").schema();
+        this.f3250 = readerSchema.getField("F325").schema();
+        this.f3260 = readerSchema.getField("F326").schema();
+        this.f3270 = readerSchema.getField("F327").schema();
+        this.f3280 = readerSchema.getField("F328").schema();
+        this.f3290 = readerSchema.getField("F329").schema();
+        this.f3300 = readerSchema.getField("F330").schema();
+        this.f3310 = readerSchema.getField("F331").schema();
+        this.f3320 = readerSchema.getField("F332").schema();
+        this.f3330 = readerSchema.getField("F333").schema();
+        this.f3340 = readerSchema.getField("F334").schema();
+        this.f3350 = readerSchema.getField("F335").schema();
+        this.f3360 = readerSchema.getField("F336").schema();
+        this.f3370 = readerSchema.getField("F337").schema();
+        this.f3380 = readerSchema.getField("F338").schema();
+        this.f3390 = readerSchema.getField("F339").schema();
+        this.f3400 = readerSchema.getField("F340").schema();
+        this.f3410 = readerSchema.getField("F341").schema();
+        this.f3420 = readerSchema.getField("F342").schema();
+        this.f3430 = readerSchema.getField("F343").schema();
+        this.f3440 = readerSchema.getField("F344").schema();
+        this.f3450 = readerSchema.getField("F345").schema();
+        this.f3460 = readerSchema.getField("F346").schema();
+        this.f3470 = readerSchema.getField("F347").schema();
+        this.f3480 = readerSchema.getField("F348").schema();
+        this.f3490 = readerSchema.getField("F349").schema();
+        this.f3500 = readerSchema.getField("F350").schema();
+        this.f3510 = readerSchema.getField("F351").schema();
+        this.f3520 = readerSchema.getField("F352").schema();
+        this.f3530 = readerSchema.getField("F353").schema();
+        this.f3540 = readerSchema.getField("F354").schema();
+        this.f3550 = readerSchema.getField("F355").schema();
+        this.f3560 = readerSchema.getField("F356").schema();
+        this.f3570 = readerSchema.getField("F357").schema();
+        this.f3580 = readerSchema.getField("F358").schema();
+        this.f3590 = readerSchema.getField("F359").schema();
+        this.f3600 = readerSchema.getField("F360").schema();
+        this.f3610 = readerSchema.getField("F361").schema();
+        this.f3620 = readerSchema.getField("F362").schema();
+        this.f3630 = readerSchema.getField("F363").schema();
+        this.f3640 = readerSchema.getField("F364").schema();
+        this.f3650 = readerSchema.getField("F365").schema();
+        this.f3660 = readerSchema.getField("F366").schema();
+        this.f3670 = readerSchema.getField("F367").schema();
+        this.f3680 = readerSchema.getField("F368").schema();
+        this.f3690 = readerSchema.getField("F369").schema();
+        this.f3700 = readerSchema.getField("F370").schema();
+        this.f3710 = readerSchema.getField("F371").schema();
+        this.f3720 = readerSchema.getField("F372").schema();
+        this.f3730 = readerSchema.getField("F373").schema();
+        this.f3740 = readerSchema.getField("F374").schema();
+        this.f3750 = readerSchema.getField("F375").schema();
+        this.f3760 = readerSchema.getField("F376").schema();
+        this.f3770 = readerSchema.getField("F377").schema();
+        this.f3780 = readerSchema.getField("F378").schema();
+        this.f3790 = readerSchema.getField("F379").schema();
+        this.f3800 = readerSchema.getField("F380").schema();
+        this.f3810 = readerSchema.getField("F381").schema();
+        this.f3820 = readerSchema.getField("F382").schema();
+        this.f3830 = readerSchema.getField("F383").schema();
+        this.f3840 = readerSchema.getField("F384").schema();
+        this.f3850 = readerSchema.getField("F385").schema();
+        this.f3860 = readerSchema.getField("F386").schema();
+        this.f3870 = readerSchema.getField("F387").schema();
+        this.f3880 = readerSchema.getField("F388").schema();
+        this.f3890 = readerSchema.getField("F389").schema();
+        this.f3900 = readerSchema.getField("F390").schema();
+        this.f3910 = readerSchema.getField("F391").schema();
+        this.f3920 = readerSchema.getField("F392").schema();
+        this.f3930 = readerSchema.getField("F393").schema();
+        this.f3940 = readerSchema.getField("F394").schema();
+        this.f3950 = readerSchema.getField("F395").schema();
+        this.f3960 = readerSchema.getField("F396").schema();
+        this.f3970 = readerSchema.getField("F397").schema();
+        this.f3980 = readerSchema.getField("F398").schema();
+        this.f3990 = readerSchema.getField("F399").schema();
+        this.f4000 = readerSchema.getField("F400").schema();
+        this.f4010 = readerSchema.getField("F401").schema();
+        this.f4020 = readerSchema.getField("F402").schema();
+        this.f4030 = readerSchema.getField("F403").schema();
+        this.f4040 = readerSchema.getField("F404").schema();
+        this.f4050 = readerSchema.getField("F405").schema();
+        this.f4060 = readerSchema.getField("F406").schema();
+        this.f4070 = readerSchema.getField("F407").schema();
+        this.f4080 = readerSchema.getField("F408").schema();
+        this.f4090 = readerSchema.getField("F409").schema();
+        this.f4100 = readerSchema.getField("F410").schema();
+        this.f4110 = readerSchema.getField("F411").schema();
+        this.f4120 = readerSchema.getField("F412").schema();
+        this.f4130 = readerSchema.getField("F413").schema();
+        this.f4140 = readerSchema.getField("F414").schema();
+        this.f4150 = readerSchema.getField("F415").schema();
+        this.f4160 = readerSchema.getField("F416").schema();
+        this.f4170 = readerSchema.getField("F417").schema();
+        this.f4180 = readerSchema.getField("F418").schema();
+        this.f4190 = readerSchema.getField("F419").schema();
+        this.f4200 = readerSchema.getField("F420").schema();
+        this.f4210 = readerSchema.getField("F421").schema();
+        this.f4220 = readerSchema.getField("F422").schema();
+        this.f4230 = readerSchema.getField("F423").schema();
+        this.f4240 = readerSchema.getField("F424").schema();
+        this.f4250 = readerSchema.getField("F425").schema();
+        this.f4260 = readerSchema.getField("F426").schema();
+        this.f4270 = readerSchema.getField("F427").schema();
+        this.f4280 = readerSchema.getField("F428").schema();
+        this.f4290 = readerSchema.getField("F429").schema();
+        this.f4300 = readerSchema.getField("F430").schema();
+        this.f4310 = readerSchema.getField("F431").schema();
+        this.f4320 = readerSchema.getField("F432").schema();
+        this.f4330 = readerSchema.getField("F433").schema();
+        this.f4340 = readerSchema.getField("F434").schema();
+        this.f4350 = readerSchema.getField("F435").schema();
+        this.f4360 = readerSchema.getField("F436").schema();
+        this.f4370 = readerSchema.getField("F437").schema();
+        this.f4380 = readerSchema.getField("F438").schema();
+        this.f4390 = readerSchema.getField("F439").schema();
+        this.f4400 = readerSchema.getField("F440").schema();
+        this.f4410 = readerSchema.getField("F441").schema();
+        this.f4420 = readerSchema.getField("F442").schema();
+        this.f4430 = readerSchema.getField("F443").schema();
+        this.f4440 = readerSchema.getField("F444").schema();
+        this.f4450 = readerSchema.getField("F445").schema();
+        this.f4460 = readerSchema.getField("F446").schema();
+        this.f4470 = readerSchema.getField("F447").schema();
+        this.f4480 = readerSchema.getField("F448").schema();
+        this.f4490 = readerSchema.getField("F449").schema();
+        this.f4500 = readerSchema.getField("F450").schema();
+        this.f4510 = readerSchema.getField("F451").schema();
+        this.f4520 = readerSchema.getField("F452").schema();
+        this.f4530 = readerSchema.getField("F453").schema();
+        this.f4540 = readerSchema.getField("F454").schema();
+        this.f4550 = readerSchema.getField("F455").schema();
+        this.f4560 = readerSchema.getField("F456").schema();
+        this.f4570 = readerSchema.getField("F457").schema();
+        this.f4580 = readerSchema.getField("F458").schema();
+        this.f4590 = readerSchema.getField("F459").schema();
+        this.f4600 = readerSchema.getField("F460").schema();
+        this.f4610 = readerSchema.getField("F461").schema();
+        this.f4620 = readerSchema.getField("F462").schema();
+        this.f4630 = readerSchema.getField("F463").schema();
+        this.f4640 = readerSchema.getField("F464").schema();
+        this.f4650 = readerSchema.getField("F465").schema();
+        this.f4660 = readerSchema.getField("F466").schema();
+        this.f4670 = readerSchema.getField("F467").schema();
+        this.f4680 = readerSchema.getField("F468").schema();
+        this.f4690 = readerSchema.getField("F469").schema();
+        this.f4700 = readerSchema.getField("F470").schema();
+        this.f4710 = readerSchema.getField("F471").schema();
+        this.f4720 = readerSchema.getField("F472").schema();
+        this.f4730 = readerSchema.getField("F473").schema();
+        this.f4740 = readerSchema.getField("F474").schema();
+        this.f4750 = readerSchema.getField("F475").schema();
+        this.f4760 = readerSchema.getField("F476").schema();
+        this.f4770 = readerSchema.getField("F477").schema();
+        this.f4780 = readerSchema.getField("F478").schema();
+        this.f4790 = readerSchema.getField("F479").schema();
+        this.f4800 = readerSchema.getField("F480").schema();
+        this.f4810 = readerSchema.getField("F481").schema();
+        this.f4820 = readerSchema.getField("F482").schema();
+        this.f4830 = readerSchema.getField("F483").schema();
+        this.f4840 = readerSchema.getField("F484").schema();
+        this.f4850 = readerSchema.getField("F485").schema();
+        this.f4860 = readerSchema.getField("F486").schema();
+        this.f4870 = readerSchema.getField("F487").schema();
+        this.f4880 = readerSchema.getField("F488").schema();
+        this.f4890 = readerSchema.getField("F489").schema();
+        this.f4900 = readerSchema.getField("F490").schema();
+        this.f4910 = readerSchema.getField("F491").schema();
+        this.f4920 = readerSchema.getField("F492").schema();
+        this.f4930 = readerSchema.getField("F493").schema();
+        this.f4940 = readerSchema.getField("F494").schema();
+        this.f4950 = readerSchema.getField("F495").schema();
+        this.f4960 = readerSchema.getField("F496").schema();
+        this.f4970 = readerSchema.getField("F497").schema();
+        this.f4980 = readerSchema.getField("F498").schema();
+        this.f4990 = readerSchema.getField("F499").schema();
+        this.f5000 = readerSchema.getField("F500").schema();
+        this.f5010 = readerSchema.getField("F501").schema();
+        this.f5020 = readerSchema.getField("F502").schema();
+        this.f5030 = readerSchema.getField("F503").schema();
+        this.f5040 = readerSchema.getField("F504").schema();
+        this.f5050 = readerSchema.getField("F505").schema();
+        this.f5060 = readerSchema.getField("F506").schema();
+        this.f5070 = readerSchema.getField("F507").schema();
+        this.f5080 = readerSchema.getField("F508").schema();
+        this.f5090 = readerSchema.getField("F509").schema();
+        this.f5100 = readerSchema.getField("F510").schema();
+        this.f5110 = readerSchema.getField("F511").schema();
+        this.f5120 = readerSchema.getField("F512").schema();
+        this.f5130 = readerSchema.getField("F513").schema();
+        this.f5140 = readerSchema.getField("F514").schema();
+        this.f5150 = readerSchema.getField("F515").schema();
+        this.f5160 = readerSchema.getField("F516").schema();
+        this.f5170 = readerSchema.getField("F517").schema();
+        this.f5180 = readerSchema.getField("F518").schema();
+        this.f5190 = readerSchema.getField("F519").schema();
+        this.f5200 = readerSchema.getField("F520").schema();
+        this.f5210 = readerSchema.getField("F521").schema();
+        this.f5220 = readerSchema.getField("F522").schema();
+        this.f5230 = readerSchema.getField("F523").schema();
+        this.f5240 = readerSchema.getField("F524").schema();
+        this.f5250 = readerSchema.getField("F525").schema();
+        this.f5260 = readerSchema.getField("F526").schema();
+        this.f5270 = readerSchema.getField("F527").schema();
+        this.f5280 = readerSchema.getField("F528").schema();
+        this.f5290 = readerSchema.getField("F529").schema();
+        this.f5300 = readerSchema.getField("F530").schema();
+        this.f5310 = readerSchema.getField("F531").schema();
+        this.f5320 = readerSchema.getField("F532").schema();
+        this.f5330 = readerSchema.getField("F533").schema();
+        this.f5340 = readerSchema.getField("F534").schema();
+        this.f5350 = readerSchema.getField("F535").schema();
+        this.f5360 = readerSchema.getField("F536").schema();
+        this.f5370 = readerSchema.getField("F537").schema();
+        this.f5380 = readerSchema.getField("F538").schema();
+        this.f5390 = readerSchema.getField("F539").schema();
+        this.f5400 = readerSchema.getField("F540").schema();
+        this.f5410 = readerSchema.getField("F541").schema();
+        this.f5420 = readerSchema.getField("F542").schema();
+        this.f5430 = readerSchema.getField("F543").schema();
+        this.f5440 = readerSchema.getField("F544").schema();
+        this.f5450 = readerSchema.getField("F545").schema();
+        this.f5460 = readerSchema.getField("F546").schema();
+        this.f5470 = readerSchema.getField("F547").schema();
+        this.f5480 = readerSchema.getField("F548").schema();
+        this.f5490 = readerSchema.getField("F549").schema();
+        this.f5500 = readerSchema.getField("F550").schema();
+        this.f5510 = readerSchema.getField("F551").schema();
+        this.f5520 = readerSchema.getField("F552").schema();
+        this.f5530 = readerSchema.getField("F553").schema();
+        this.f5540 = readerSchema.getField("F554").schema();
+        this.f5550 = readerSchema.getField("F555").schema();
+        this.f5560 = readerSchema.getField("F556").schema();
+        this.f5570 = readerSchema.getField("F557").schema();
+        this.f5580 = readerSchema.getField("F558").schema();
+        this.f5590 = readerSchema.getField("F559").schema();
+        this.f5600 = readerSchema.getField("F560").schema();
+        this.f5610 = readerSchema.getField("F561").schema();
+        this.f5620 = readerSchema.getField("F562").schema();
+        this.f5630 = readerSchema.getField("F563").schema();
+        this.f5640 = readerSchema.getField("F564").schema();
+        this.f5650 = readerSchema.getField("F565").schema();
+        this.f5660 = readerSchema.getField("F566").schema();
+        this.f5670 = readerSchema.getField("F567").schema();
+        this.f5680 = readerSchema.getField("F568").schema();
+        this.f5690 = readerSchema.getField("F569").schema();
+        this.f5700 = readerSchema.getField("F570").schema();
+        this.f5710 = readerSchema.getField("F571").schema();
+        this.f5720 = readerSchema.getField("F572").schema();
+        this.f5730 = readerSchema.getField("F573").schema();
+        this.f5740 = readerSchema.getField("F574").schema();
+        this.f5750 = readerSchema.getField("F575").schema();
+        this.f5760 = readerSchema.getField("F576").schema();
+        this.f5770 = readerSchema.getField("F577").schema();
+        this.f5780 = readerSchema.getField("F578").schema();
+        this.f5790 = readerSchema.getField("F579").schema();
+        this.f5800 = readerSchema.getField("F580").schema();
+        this.f5810 = readerSchema.getField("F581").schema();
+        this.f5820 = readerSchema.getField("F582").schema();
+        this.f5830 = readerSchema.getField("F583").schema();
+        this.f5840 = readerSchema.getField("F584").schema();
+        this.f5850 = readerSchema.getField("F585").schema();
+        this.f5860 = readerSchema.getField("F586").schema();
+        this.f5870 = readerSchema.getField("F587").schema();
+        this.f5880 = readerSchema.getField("F588").schema();
+        this.f5890 = readerSchema.getField("F589").schema();
+        this.f5900 = readerSchema.getField("F590").schema();
+        this.f5910 = readerSchema.getField("F591").schema();
+        this.f5920 = readerSchema.getField("F592").schema();
+        this.f5930 = readerSchema.getField("F593").schema();
+        this.f5940 = readerSchema.getField("F594").schema();
+        this.f5950 = readerSchema.getField("F595").schema();
+        this.f5960 = readerSchema.getField("F596").schema();
+        this.f5970 = readerSchema.getField("F597").schema();
+        this.f5980 = readerSchema.getField("F598").schema();
+        this.f5990 = readerSchema.getField("F599").schema();
+        this.f6000 = readerSchema.getField("F600").schema();
+        this.f6010 = readerSchema.getField("F601").schema();
+        this.f6020 = readerSchema.getField("F602").schema();
+        this.f6030 = readerSchema.getField("F603").schema();
+        this.f6040 = readerSchema.getField("F604").schema();
+        this.f6050 = readerSchema.getField("F605").schema();
+        this.f6060 = readerSchema.getField("F606").schema();
+        this.f6070 = readerSchema.getField("F607").schema();
+        this.f6080 = readerSchema.getField("F608").schema();
+        this.f6090 = readerSchema.getField("F609").schema();
+        this.f6100 = readerSchema.getField("F610").schema();
+        this.f6110 = readerSchema.getField("F611").schema();
+        this.f6120 = readerSchema.getField("F612").schema();
+        this.f6130 = readerSchema.getField("F613").schema();
+        this.f6140 = readerSchema.getField("F614").schema();
+        this.f6150 = readerSchema.getField("F615").schema();
+        this.f6160 = readerSchema.getField("F616").schema();
+        this.f6170 = readerSchema.getField("F617").schema();
+        this.f6180 = readerSchema.getField("F618").schema();
+        this.f6190 = readerSchema.getField("F619").schema();
+        this.f6200 = readerSchema.getField("F620").schema();
+        this.f6210 = readerSchema.getField("F621").schema();
+        this.f6220 = readerSchema.getField("F622").schema();
+        this.f6230 = readerSchema.getField("F623").schema();
+        this.f6240 = readerSchema.getField("F624").schema();
+        this.f6250 = readerSchema.getField("F625").schema();
+        this.f6260 = readerSchema.getField("F626").schema();
+        this.f6270 = readerSchema.getField("F627").schema();
+        this.f6280 = readerSchema.getField("F628").schema();
+        this.f6290 = readerSchema.getField("F629").schema();
+        this.f6300 = readerSchema.getField("F630").schema();
+        this.f6310 = readerSchema.getField("F631").schema();
+        this.f6320 = readerSchema.getField("F632").schema();
+        this.f6330 = readerSchema.getField("F633").schema();
+        this.f6340 = readerSchema.getField("F634").schema();
+        this.f6350 = readerSchema.getField("F635").schema();
+        this.f6360 = readerSchema.getField("F636").schema();
+        this.f6370 = readerSchema.getField("F637").schema();
+        this.f6380 = readerSchema.getField("F638").schema();
+        this.f6390 = readerSchema.getField("F639").schema();
+        this.f6400 = readerSchema.getField("F640").schema();
+        this.f6410 = readerSchema.getField("F641").schema();
+        this.f6420 = readerSchema.getField("F642").schema();
+        this.f6430 = readerSchema.getField("F643").schema();
+        this.f6440 = readerSchema.getField("F644").schema();
+        this.f6450 = readerSchema.getField("F645").schema();
+        this.f6460 = readerSchema.getField("F646").schema();
+        this.f6470 = readerSchema.getField("F647").schema();
+        this.f6480 = readerSchema.getField("F648").schema();
+        this.f6490 = readerSchema.getField("F649").schema();
+        this.f6500 = readerSchema.getField("F650").schema();
+        this.f6510 = readerSchema.getField("F651").schema();
+        this.f6520 = readerSchema.getField("F652").schema();
+        this.f6530 = readerSchema.getField("F653").schema();
+        this.f6540 = readerSchema.getField("F654").schema();
+        this.f6550 = readerSchema.getField("F655").schema();
+        this.f6560 = readerSchema.getField("F656").schema();
+        this.f6570 = readerSchema.getField("F657").schema();
+        this.f6580 = readerSchema.getField("F658").schema();
+        this.f6590 = readerSchema.getField("F659").schema();
+        this.f6600 = readerSchema.getField("F660").schema();
+        this.f6610 = readerSchema.getField("F661").schema();
+        this.f6620 = readerSchema.getField("F662").schema();
+        this.f6630 = readerSchema.getField("F663").schema();
+        this.f6640 = readerSchema.getField("F664").schema();
+        this.f6650 = readerSchema.getField("F665").schema();
+        this.f6660 = readerSchema.getField("F666").schema();
+        this.f6670 = readerSchema.getField("F667").schema();
+        this.f6680 = readerSchema.getField("F668").schema();
+        this.f6690 = readerSchema.getField("F669").schema();
+        this.f6700 = readerSchema.getField("F670").schema();
+        this.f6710 = readerSchema.getField("F671").schema();
+        this.f6720 = readerSchema.getField("F672").schema();
+        this.f6730 = readerSchema.getField("F673").schema();
+        this.f6740 = readerSchema.getField("F674").schema();
+        this.f6750 = readerSchema.getField("F675").schema();
+        this.f6760 = readerSchema.getField("F676").schema();
+        this.f6770 = readerSchema.getField("F677").schema();
+        this.f6780 = readerSchema.getField("F678").schema();
+        this.f6790 = readerSchema.getField("F679").schema();
+        this.f6800 = readerSchema.getField("F680").schema();
+        this.f6810 = readerSchema.getField("F681").schema();
+        this.f6820 = readerSchema.getField("F682").schema();
+        this.f6830 = readerSchema.getField("F683").schema();
+        this.f6840 = readerSchema.getField("F684").schema();
+        this.f6850 = readerSchema.getField("F685").schema();
+        this.f6860 = readerSchema.getField("F686").schema();
+        this.f6870 = readerSchema.getField("F687").schema();
+        this.f6880 = readerSchema.getField("F688").schema();
+        this.f6890 = readerSchema.getField("F689").schema();
+        this.f6900 = readerSchema.getField("F690").schema();
+        this.f6910 = readerSchema.getField("F691").schema();
+        this.f6920 = readerSchema.getField("F692").schema();
+        this.f6930 = readerSchema.getField("F693").schema();
+        this.f6940 = readerSchema.getField("F694").schema();
+        this.f6950 = readerSchema.getField("F695").schema();
+        this.f6960 = readerSchema.getField("F696").schema();
+        this.f6970 = readerSchema.getField("F697").schema();
+        this.f6980 = readerSchema.getField("F698").schema();
+        this.f6990 = readerSchema.getField("F699").schema();
+        this.f7000 = readerSchema.getField("F700").schema();
+        this.f7010 = readerSchema.getField("F701").schema();
+        this.f7020 = readerSchema.getField("F702").schema();
+        this.f7030 = readerSchema.getField("F703").schema();
+        this.f7040 = readerSchema.getField("F704").schema();
+        this.f7050 = readerSchema.getField("F705").schema();
+        this.f7060 = readerSchema.getField("F706").schema();
+        this.f7070 = readerSchema.getField("F707").schema();
+        this.f7080 = readerSchema.getField("F708").schema();
+        this.f7090 = readerSchema.getField("F709").schema();
+        this.f7100 = readerSchema.getField("F710").schema();
+        this.f7110 = readerSchema.getField("F711").schema();
+        this.f7120 = readerSchema.getField("F712").schema();
+        this.f7130 = readerSchema.getField("F713").schema();
+        this.f7140 = readerSchema.getField("F714").schema();
+        this.f7150 = readerSchema.getField("F715").schema();
+        this.f7160 = readerSchema.getField("F716").schema();
+        this.f7170 = readerSchema.getField("F717").schema();
+        this.f7180 = readerSchema.getField("F718").schema();
+        this.f7190 = readerSchema.getField("F719").schema();
+        this.f7200 = readerSchema.getField("F720").schema();
+        this.f7210 = readerSchema.getField("F721").schema();
+        this.f7220 = readerSchema.getField("F722").schema();
+        this.f7230 = readerSchema.getField("F723").schema();
+        this.f7240 = readerSchema.getField("F724").schema();
+        this.f7250 = readerSchema.getField("F725").schema();
+        this.f7260 = readerSchema.getField("F726").schema();
+        this.f7270 = readerSchema.getField("F727").schema();
+        this.f7280 = readerSchema.getField("F728").schema();
+        this.f7290 = readerSchema.getField("F729").schema();
+        this.f7300 = readerSchema.getField("F730").schema();
+        this.f7310 = readerSchema.getField("F731").schema();
+        this.f7320 = readerSchema.getField("F732").schema();
+        this.f7330 = readerSchema.getField("F733").schema();
+        this.f7340 = readerSchema.getField("F734").schema();
+        this.f7350 = readerSchema.getField("F735").schema();
+        this.f7360 = readerSchema.getField("F736").schema();
+        this.f7370 = readerSchema.getField("F737").schema();
+        this.f7380 = readerSchema.getField("F738").schema();
+        this.f7390 = readerSchema.getField("F739").schema();
+        this.f7400 = readerSchema.getField("F740").schema();
+        this.f7410 = readerSchema.getField("F741").schema();
+        this.f7420 = readerSchema.getField("F742").schema();
+        this.f7430 = readerSchema.getField("F743").schema();
+        this.f7440 = readerSchema.getField("F744").schema();
+        this.f7450 = readerSchema.getField("F745").schema();
+        this.f7460 = readerSchema.getField("F746").schema();
+        this.f7470 = readerSchema.getField("F747").schema();
+        this.f7480 = readerSchema.getField("F748").schema();
+        this.f7490 = readerSchema.getField("F749").schema();
+        this.f7500 = readerSchema.getField("F750").schema();
+        this.f7510 = readerSchema.getField("F751").schema();
+        this.f7520 = readerSchema.getField("F752").schema();
+        this.f7530 = readerSchema.getField("F753").schema();
+        this.f7540 = readerSchema.getField("F754").schema();
+        this.f7550 = readerSchema.getField("F755").schema();
+        this.f7560 = readerSchema.getField("F756").schema();
+        this.f7570 = readerSchema.getField("F757").schema();
+        this.f7580 = readerSchema.getField("F758").schema();
+        this.f7590 = readerSchema.getField("F759").schema();
+        this.f7600 = readerSchema.getField("F760").schema();
+        this.f7610 = readerSchema.getField("F761").schema();
+        this.f7620 = readerSchema.getField("F762").schema();
+        this.f7630 = readerSchema.getField("F763").schema();
+        this.f7640 = readerSchema.getField("F764").schema();
+        this.f7650 = readerSchema.getField("F765").schema();
+        this.f7660 = readerSchema.getField("F766").schema();
+        this.f7670 = readerSchema.getField("F767").schema();
+        this.f7680 = readerSchema.getField("F768").schema();
+        this.f7690 = readerSchema.getField("F769").schema();
+        this.f7700 = readerSchema.getField("F770").schema();
+        this.f7710 = readerSchema.getField("F771").schema();
+        this.f7720 = readerSchema.getField("F772").schema();
+        this.f7730 = readerSchema.getField("F773").schema();
+        this.f7740 = readerSchema.getField("F774").schema();
+        this.f7750 = readerSchema.getField("F775").schema();
+        this.f7760 = readerSchema.getField("F776").schema();
+        this.f7770 = readerSchema.getField("F777").schema();
+        this.f7780 = readerSchema.getField("F778").schema();
+        this.f7790 = readerSchema.getField("F779").schema();
+        this.f7800 = readerSchema.getField("F780").schema();
+        this.f7810 = readerSchema.getField("F781").schema();
+        this.f7820 = readerSchema.getField("F782").schema();
+        this.f7830 = readerSchema.getField("F783").schema();
+        this.f7840 = readerSchema.getField("F784").schema();
+        this.f7850 = readerSchema.getField("F785").schema();
+        this.f7860 = readerSchema.getField("F786").schema();
+        this.f7870 = readerSchema.getField("F787").schema();
+        this.f7880 = readerSchema.getField("F788").schema();
+        this.f7890 = readerSchema.getField("F789").schema();
+        this.f7900 = readerSchema.getField("F790").schema();
+        this.f7910 = readerSchema.getField("F791").schema();
+        this.f7920 = readerSchema.getField("F792").schema();
+        this.f7930 = readerSchema.getField("F793").schema();
+        this.f7940 = readerSchema.getField("F794").schema();
+        this.f7950 = readerSchema.getField("F795").schema();
+        this.f7960 = readerSchema.getField("F796").schema();
+        this.f7970 = readerSchema.getField("F797").schema();
+        this.f7980 = readerSchema.getField("F798").schema();
+        this.f7990 = readerSchema.getField("F799").schema();
+        this.f8000 = readerSchema.getField("F800").schema();
+        this.f8010 = readerSchema.getField("F801").schema();
+        this.f8020 = readerSchema.getField("F802").schema();
+        this.f8030 = readerSchema.getField("F803").schema();
+        this.f8040 = readerSchema.getField("F804").schema();
+        this.f8050 = readerSchema.getField("F805").schema();
+        this.f8060 = readerSchema.getField("F806").schema();
+        this.f8070 = readerSchema.getField("F807").schema();
+        this.f8080 = readerSchema.getField("F808").schema();
+        this.f8090 = readerSchema.getField("F809").schema();
+        this.f8100 = readerSchema.getField("F810").schema();
+        this.f8110 = readerSchema.getField("F811").schema();
+        this.f8120 = readerSchema.getField("F812").schema();
+        this.f8130 = readerSchema.getField("F813").schema();
+        this.f8140 = readerSchema.getField("F814").schema();
+        this.f8150 = readerSchema.getField("F815").schema();
+        this.f8160 = readerSchema.getField("F816").schema();
+        this.f8170 = readerSchema.getField("F817").schema();
+        this.f8180 = readerSchema.getField("F818").schema();
+        this.f8190 = readerSchema.getField("F819").schema();
+        this.f8200 = readerSchema.getField("F820").schema();
+        this.f8210 = readerSchema.getField("F821").schema();
+        this.f8220 = readerSchema.getField("F822").schema();
+        this.f8230 = readerSchema.getField("F823").schema();
+        this.f8240 = readerSchema.getField("F824").schema();
+        this.f8250 = readerSchema.getField("F825").schema();
+        this.f8260 = readerSchema.getField("F826").schema();
+        this.f8270 = readerSchema.getField("F827").schema();
+        this.f8280 = readerSchema.getField("F828").schema();
+        this.f8290 = readerSchema.getField("F829").schema();
+        this.f8300 = readerSchema.getField("F830").schema();
+        this.f8310 = readerSchema.getField("F831").schema();
+        this.f8320 = readerSchema.getField("F832").schema();
+        this.f8330 = readerSchema.getField("F833").schema();
+        this.f8340 = readerSchema.getField("F834").schema();
+        this.f8350 = readerSchema.getField("F835").schema();
+        this.f8360 = readerSchema.getField("F836").schema();
+        this.f8370 = readerSchema.getField("F837").schema();
+        this.f8380 = readerSchema.getField("F838").schema();
+        this.f8390 = readerSchema.getField("F839").schema();
+        this.f8400 = readerSchema.getField("F840").schema();
+        this.f8410 = readerSchema.getField("F841").schema();
+        this.f8420 = readerSchema.getField("F842").schema();
+        this.f8430 = readerSchema.getField("F843").schema();
+        this.f8440 = readerSchema.getField("F844").schema();
+        this.f8450 = readerSchema.getField("F845").schema();
+        this.f8460 = readerSchema.getField("F846").schema();
+        this.f8470 = readerSchema.getField("F847").schema();
+        this.f8480 = readerSchema.getField("F848").schema();
+        this.f8490 = readerSchema.getField("F849").schema();
+        this.f8500 = readerSchema.getField("F850").schema();
+        this.f8510 = readerSchema.getField("F851").schema();
+        this.f8520 = readerSchema.getField("F852").schema();
+        this.f8530 = readerSchema.getField("F853").schema();
+        this.f8540 = readerSchema.getField("F854").schema();
+        this.f8550 = readerSchema.getField("F855").schema();
+        this.f8560 = readerSchema.getField("F856").schema();
+        this.f8570 = readerSchema.getField("F857").schema();
+        this.f8580 = readerSchema.getField("F858").schema();
+        this.f8590 = readerSchema.getField("F859").schema();
+        this.f8600 = readerSchema.getField("F860").schema();
+        this.f8610 = readerSchema.getField("F861").schema();
+        this.f8620 = readerSchema.getField("F862").schema();
+        this.f8630 = readerSchema.getField("F863").schema();
+        this.f8640 = readerSchema.getField("F864").schema();
+        this.f8650 = readerSchema.getField("F865").schema();
+        this.f8660 = readerSchema.getField("F866").schema();
+        this.f8670 = readerSchema.getField("F867").schema();
+        this.f8680 = readerSchema.getField("F868").schema();
+        this.f8690 = readerSchema.getField("F869").schema();
+        this.f8700 = readerSchema.getField("F870").schema();
+        this.f8710 = readerSchema.getField("F871").schema();
+        this.f8720 = readerSchema.getField("F872").schema();
+        this.f8730 = readerSchema.getField("F873").schema();
+        this.f8740 = readerSchema.getField("F874").schema();
+        this.f8750 = readerSchema.getField("F875").schema();
+        this.f8760 = readerSchema.getField("F876").schema();
+        this.f8770 = readerSchema.getField("F877").schema();
+        this.f8780 = readerSchema.getField("F878").schema();
+        this.f8790 = readerSchema.getField("F879").schema();
+        this.f8800 = readerSchema.getField("F880").schema();
+        this.f8810 = readerSchema.getField("F881").schema();
+        this.f8820 = readerSchema.getField("F882").schema();
+        this.f8830 = readerSchema.getField("F883").schema();
+        this.f8840 = readerSchema.getField("F884").schema();
+        this.f8850 = readerSchema.getField("F885").schema();
+        this.f8860 = readerSchema.getField("F886").schema();
+        this.f8870 = readerSchema.getField("F887").schema();
+        this.f8880 = readerSchema.getField("F888").schema();
+        this.f8890 = readerSchema.getField("F889").schema();
+        this.f8900 = readerSchema.getField("F890").schema();
+        this.f8910 = readerSchema.getField("F891").schema();
+        this.f8920 = readerSchema.getField("F892").schema();
+        this.f8930 = readerSchema.getField("F893").schema();
+        this.f8940 = readerSchema.getField("F894").schema();
+        this.f8950 = readerSchema.getField("F895").schema();
+        this.f8960 = readerSchema.getField("F896").schema();
+        this.f8970 = readerSchema.getField("F897").schema();
+        this.f8980 = readerSchema.getField("F898").schema();
+        this.f8990 = readerSchema.getField("F899").schema();
+        this.f9000 = readerSchema.getField("F900").schema();
+        this.f9010 = readerSchema.getField("F901").schema();
+        this.f9020 = readerSchema.getField("F902").schema();
+        this.f9030 = readerSchema.getField("F903").schema();
+        this.f9040 = readerSchema.getField("F904").schema();
+        this.f9050 = readerSchema.getField("F905").schema();
+        this.f9060 = readerSchema.getField("F906").schema();
+        this.f9070 = readerSchema.getField("F907").schema();
+        this.f9080 = readerSchema.getField("F908").schema();
+        this.f9090 = readerSchema.getField("F909").schema();
+        this.f9100 = readerSchema.getField("F910").schema();
+        this.f9110 = readerSchema.getField("F911").schema();
+        this.f9120 = readerSchema.getField("F912").schema();
+        this.f9130 = readerSchema.getField("F913").schema();
+        this.f9140 = readerSchema.getField("F914").schema();
+        this.f9150 = readerSchema.getField("F915").schema();
+        this.f9160 = readerSchema.getField("F916").schema();
+        this.f9170 = readerSchema.getField("F917").schema();
+        this.f9180 = readerSchema.getField("F918").schema();
+        this.f9190 = readerSchema.getField("F919").schema();
+        this.f9200 = readerSchema.getField("F920").schema();
+        this.f9210 = readerSchema.getField("F921").schema();
+        this.f9220 = readerSchema.getField("F922").schema();
+        this.f9230 = readerSchema.getField("F923").schema();
+        this.f9240 = readerSchema.getField("F924").schema();
+        this.f9250 = readerSchema.getField("F925").schema();
+        this.f9260 = readerSchema.getField("F926").schema();
+        this.f9270 = readerSchema.getField("F927").schema();
+        this.f9280 = readerSchema.getField("F928").schema();
+        this.f9290 = readerSchema.getField("F929").schema();
+        this.f9300 = readerSchema.getField("F930").schema();
+        this.f9310 = readerSchema.getField("F931").schema();
+        this.f9320 = readerSchema.getField("F932").schema();
+        this.f9330 = readerSchema.getField("F933").schema();
+        this.f9340 = readerSchema.getField("F934").schema();
+        this.f9350 = readerSchema.getField("F935").schema();
+        this.f9360 = readerSchema.getField("F936").schema();
+        this.f9370 = readerSchema.getField("F937").schema();
+        this.f9380 = readerSchema.getField("F938").schema();
+        this.f9390 = readerSchema.getField("F939").schema();
+        this.f9400 = readerSchema.getField("F940").schema();
+        this.f9410 = readerSchema.getField("F941").schema();
+        this.f9420 = readerSchema.getField("F942").schema();
+        this.f9430 = readerSchema.getField("F943").schema();
+        this.f9440 = readerSchema.getField("F944").schema();
+        this.f9450 = readerSchema.getField("F945").schema();
+        this.f9460 = readerSchema.getField("F946").schema();
+        this.f9470 = readerSchema.getField("F947").schema();
+        this.f9480 = readerSchema.getField("F948").schema();
+        this.f9490 = readerSchema.getField("F949").schema();
+        this.f9500 = readerSchema.getField("F950").schema();
+        this.f9510 = readerSchema.getField("F951").schema();
+        this.f9520 = readerSchema.getField("F952").schema();
+        this.f9530 = readerSchema.getField("F953").schema();
+        this.f9540 = readerSchema.getField("F954").schema();
+        this.f9550 = readerSchema.getField("F955").schema();
+        this.f9560 = readerSchema.getField("F956").schema();
+        this.f9570 = readerSchema.getField("F957").schema();
+        this.f9580 = readerSchema.getField("F958").schema();
+        this.f9590 = readerSchema.getField("F959").schema();
+        this.f9600 = readerSchema.getField("F960").schema();
+        this.f9610 = readerSchema.getField("F961").schema();
+        this.f9620 = readerSchema.getField("F962").schema();
+        this.f9630 = readerSchema.getField("F963").schema();
+        this.f9640 = readerSchema.getField("F964").schema();
+        this.f9650 = readerSchema.getField("F965").schema();
+        this.f9660 = readerSchema.getField("F966").schema();
+        this.f9670 = readerSchema.getField("F967").schema();
+        this.f9680 = readerSchema.getField("F968").schema();
+        this.f9690 = readerSchema.getField("F969").schema();
+        this.f9700 = readerSchema.getField("F970").schema();
+        this.f9710 = readerSchema.getField("F971").schema();
+        this.f9720 = readerSchema.getField("F972").schema();
+        this.f9730 = readerSchema.getField("F973").schema();
+        this.f9740 = readerSchema.getField("F974").schema();
+        this.f9750 = readerSchema.getField("F975").schema();
+        this.f9760 = readerSchema.getField("F976").schema();
+        this.f9770 = readerSchema.getField("F977").schema();
+        this.f9780 = readerSchema.getField("F978").schema();
+        this.f9790 = readerSchema.getField("F979").schema();
+        this.f9800 = readerSchema.getField("F980").schema();
+        this.f9810 = readerSchema.getField("F981").schema();
+        this.f9820 = readerSchema.getField("F982").schema();
+        this.f9830 = readerSchema.getField("F983").schema();
+        this.f9840 = readerSchema.getField("F984").schema();
+        this.f9850 = readerSchema.getField("F985").schema();
+        this.f9860 = readerSchema.getField("F986").schema();
+        this.f9870 = readerSchema.getField("F987").schema();
+        this.f9880 = readerSchema.getField("F988").schema();
+        this.f9890 = readerSchema.getField("F989").schema();
+        this.f9900 = readerSchema.getField("F990").schema();
+        this.f9910 = readerSchema.getField("F991").schema();
+        this.f9920 = readerSchema.getField("F992").schema();
+        this.f9930 = readerSchema.getField("F993").schema();
+        this.f9940 = readerSchema.getField("F994").schema();
+        this.f9950 = readerSchema.getField("F995").schema();
+        this.f9960 = readerSchema.getField("F996").schema();
+        this.f9970 = readerSchema.getField("F997").schema();
+        this.f9980 = readerSchema.getField("F998").schema();
+        this.f9990 = readerSchema.getField("F999").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F0': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F1': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(2);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(3);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F3': "+ unionIndex3));
+            }
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence4;
+                Object oldString4 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(4);
+                if (oldString4 instanceof Utf8) {
+                    charSequence4 = (decoder).readString(((Utf8) oldString4));
+                } else {
+                    charSequence4 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, charSequence4);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F4': "+ unionIndex4));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Utf8 charSequence5;
+                Object oldString5 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(5);
+                if (oldString5 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) oldString5));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, charSequence5);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F5': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence6;
+                Object oldString6 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(6);
+                if (oldString6 instanceof Utf8) {
+                    charSequence6 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence6 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, charSequence6);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F6': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence7;
+                Object oldString7 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(7);
+                if (oldString7 instanceof Utf8) {
+                    charSequence7 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence7 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, charSequence7);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F7': "+ unionIndex7));
+            }
+        }
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, null);
+        } else {
+            if (unionIndex8 == 1) {
+                Utf8 charSequence8;
+                Object oldString8 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(8);
+                if (oldString8 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString8));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, charSequence8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F8': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, null);
+        } else {
+            if (unionIndex9 == 1) {
+                Utf8 charSequence9;
+                Object oldString9 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(9);
+                if (oldString9 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString9));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F9': "+ unionIndex9));
+            }
+        }
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, null);
+        } else {
+            if (unionIndex10 == 1) {
+                Utf8 charSequence10;
+                Object oldString10 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(10);
+                if (oldString10 instanceof Utf8) {
+                    charSequence10 = (decoder).readString(((Utf8) oldString10));
+                } else {
+                    charSequence10 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, charSequence10);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F10': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, null);
+        } else {
+            if (unionIndex11 == 1) {
+                Utf8 charSequence11;
+                Object oldString11 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(11);
+                if (oldString11 instanceof Utf8) {
+                    charSequence11 = (decoder).readString(((Utf8) oldString11));
+                } else {
+                    charSequence11 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, charSequence11);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F11': "+ unionIndex11));
+            }
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence12;
+                Object oldString12 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(12);
+                if (oldString12 instanceof Utf8) {
+                    charSequence12 = (decoder).readString(((Utf8) oldString12));
+                } else {
+                    charSequence12 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, charSequence12);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F12': "+ unionIndex12));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence13;
+                Object oldString13 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(13);
+                if (oldString13 instanceof Utf8) {
+                    charSequence13 = (decoder).readString(((Utf8) oldString13));
+                } else {
+                    charSequence13 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, charSequence13);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F13': "+ unionIndex13));
+            }
+        }
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence14;
+                Object oldString14 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(14);
+                if (oldString14 instanceof Utf8) {
+                    charSequence14 = (decoder).readString(((Utf8) oldString14));
+                } else {
+                    charSequence14 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, charSequence14);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F14': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence15;
+                Object oldString15 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(15);
+                if (oldString15 instanceof Utf8) {
+                    charSequence15 = (decoder).readString(((Utf8) oldString15));
+                } else {
+                    charSequence15 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, charSequence15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F15': "+ unionIndex15));
+            }
+        }
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Utf8 charSequence16;
+                Object oldString16 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(16);
+                if (oldString16 instanceof Utf8) {
+                    charSequence16 = (decoder).readString(((Utf8) oldString16));
+                } else {
+                    charSequence16 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, charSequence16);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F16': "+ unionIndex16));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Utf8 charSequence17;
+                Object oldString17 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(17);
+                if (oldString17 instanceof Utf8) {
+                    charSequence17 = (decoder).readString(((Utf8) oldString17));
+                } else {
+                    charSequence17 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, charSequence17);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F17': "+ unionIndex17));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Utf8 charSequence18;
+                Object oldString18 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(18);
+                if (oldString18 instanceof Utf8) {
+                    charSequence18 = (decoder).readString(((Utf8) oldString18));
+                } else {
+                    charSequence18 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, charSequence18);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F18': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex19 = (decoder.readIndex());
+        if (unionIndex19 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, null);
+        } else {
+            if (unionIndex19 == 1) {
+                Utf8 charSequence19;
+                Object oldString19 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(19);
+                if (oldString19 instanceof Utf8) {
+                    charSequence19 = (decoder).readString(((Utf8) oldString19));
+                } else {
+                    charSequence19 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, charSequence19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F19': "+ unionIndex19));
+            }
+        }
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, null);
+        } else {
+            if (unionIndex20 == 1) {
+                Utf8 charSequence20;
+                Object oldString20 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(20);
+                if (oldString20 instanceof Utf8) {
+                    charSequence20 = (decoder).readString(((Utf8) oldString20));
+                } else {
+                    charSequence20 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, charSequence20);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F20': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, null);
+        } else {
+            if (unionIndex21 == 1) {
+                Utf8 charSequence21;
+                Object oldString21 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(21);
+                if (oldString21 instanceof Utf8) {
+                    charSequence21 = (decoder).readString(((Utf8) oldString21));
+                } else {
+                    charSequence21 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, charSequence21);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F21': "+ unionIndex21));
+            }
+        }
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Utf8 charSequence22;
+                Object oldString22 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(22);
+                if (oldString22 instanceof Utf8) {
+                    charSequence22 = (decoder).readString(((Utf8) oldString22));
+                } else {
+                    charSequence22 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, charSequence22);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F22': "+ unionIndex22));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Utf8 charSequence23;
+                Object oldString23 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(23);
+                if (oldString23 instanceof Utf8) {
+                    charSequence23 = (decoder).readString(((Utf8) oldString23));
+                } else {
+                    charSequence23 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, charSequence23);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F23': "+ unionIndex23));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Utf8 charSequence24;
+                Object oldString24 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(24);
+                if (oldString24 instanceof Utf8) {
+                    charSequence24 = (decoder).readString(((Utf8) oldString24));
+                } else {
+                    charSequence24 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, charSequence24);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F24': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, null);
+        } else {
+            if (unionIndex25 == 1) {
+                Utf8 charSequence25;
+                Object oldString25 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(25);
+                if (oldString25 instanceof Utf8) {
+                    charSequence25 = (decoder).readString(((Utf8) oldString25));
+                } else {
+                    charSequence25 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, charSequence25);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F25': "+ unionIndex25));
+            }
+        }
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, null);
+        } else {
+            if (unionIndex26 == 1) {
+                Utf8 charSequence26;
+                Object oldString26 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(26);
+                if (oldString26 instanceof Utf8) {
+                    charSequence26 = (decoder).readString(((Utf8) oldString26));
+                } else {
+                    charSequence26 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, charSequence26);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F26': "+ unionIndex26));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex27 = (decoder.readIndex());
+        if (unionIndex27 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, null);
+        } else {
+            if (unionIndex27 == 1) {
+                Utf8 charSequence27;
+                Object oldString27 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(27);
+                if (oldString27 instanceof Utf8) {
+                    charSequence27 = (decoder).readString(((Utf8) oldString27));
+                } else {
+                    charSequence27 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, charSequence27);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F27': "+ unionIndex27));
+            }
+        }
+        int unionIndex28 = (decoder.readIndex());
+        if (unionIndex28 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, null);
+        } else {
+            if (unionIndex28 == 1) {
+                Utf8 charSequence28;
+                Object oldString28 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(28);
+                if (oldString28 instanceof Utf8) {
+                    charSequence28 = (decoder).readString(((Utf8) oldString28));
+                } else {
+                    charSequence28 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, charSequence28);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F28': "+ unionIndex28));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex29 = (decoder.readIndex());
+        if (unionIndex29 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, null);
+        } else {
+            if (unionIndex29 == 1) {
+                Utf8 charSequence29;
+                Object oldString29 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(29);
+                if (oldString29 instanceof Utf8) {
+                    charSequence29 = (decoder).readString(((Utf8) oldString29));
+                } else {
+                    charSequence29 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, charSequence29);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F29': "+ unionIndex29));
+            }
+        }
+        int unionIndex30 = (decoder.readIndex());
+        if (unionIndex30 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, null);
+        } else {
+            if (unionIndex30 == 1) {
+                Utf8 charSequence30;
+                Object oldString30 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(30);
+                if (oldString30 instanceof Utf8) {
+                    charSequence30 = (decoder).readString(((Utf8) oldString30));
+                } else {
+                    charSequence30 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, charSequence30);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F30': "+ unionIndex30));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex31 = (decoder.readIndex());
+        if (unionIndex31 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, null);
+        } else {
+            if (unionIndex31 == 1) {
+                Utf8 charSequence31;
+                Object oldString31 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(31);
+                if (oldString31 instanceof Utf8) {
+                    charSequence31 = (decoder).readString(((Utf8) oldString31));
+                } else {
+                    charSequence31 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, charSequence31);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F31': "+ unionIndex31));
+            }
+        }
+        int unionIndex32 = (decoder.readIndex());
+        if (unionIndex32 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, null);
+        } else {
+            if (unionIndex32 == 1) {
+                Utf8 charSequence32;
+                Object oldString32 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(32);
+                if (oldString32 instanceof Utf8) {
+                    charSequence32 = (decoder).readString(((Utf8) oldString32));
+                } else {
+                    charSequence32 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, charSequence32);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F32': "+ unionIndex32));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex33 = (decoder.readIndex());
+        if (unionIndex33 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, null);
+        } else {
+            if (unionIndex33 == 1) {
+                Utf8 charSequence33;
+                Object oldString33 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(33);
+                if (oldString33 instanceof Utf8) {
+                    charSequence33 = (decoder).readString(((Utf8) oldString33));
+                } else {
+                    charSequence33 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, charSequence33);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F33': "+ unionIndex33));
+            }
+        }
+        int unionIndex34 = (decoder.readIndex());
+        if (unionIndex34 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, null);
+        } else {
+            if (unionIndex34 == 1) {
+                Utf8 charSequence34;
+                Object oldString34 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(34);
+                if (oldString34 instanceof Utf8) {
+                    charSequence34 = (decoder).readString(((Utf8) oldString34));
+                } else {
+                    charSequence34 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, charSequence34);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F34': "+ unionIndex34));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex35 = (decoder.readIndex());
+        if (unionIndex35 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, null);
+        } else {
+            if (unionIndex35 == 1) {
+                Utf8 charSequence35;
+                Object oldString35 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(35);
+                if (oldString35 instanceof Utf8) {
+                    charSequence35 = (decoder).readString(((Utf8) oldString35));
+                } else {
+                    charSequence35 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, charSequence35);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F35': "+ unionIndex35));
+            }
+        }
+        int unionIndex36 = (decoder.readIndex());
+        if (unionIndex36 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, null);
+        } else {
+            if (unionIndex36 == 1) {
+                Utf8 charSequence36;
+                Object oldString36 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(36);
+                if (oldString36 instanceof Utf8) {
+                    charSequence36 = (decoder).readString(((Utf8) oldString36));
+                } else {
+                    charSequence36 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, charSequence36);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F36': "+ unionIndex36));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex37 = (decoder.readIndex());
+        if (unionIndex37 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, null);
+        } else {
+            if (unionIndex37 == 1) {
+                Utf8 charSequence37;
+                Object oldString37 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(37);
+                if (oldString37 instanceof Utf8) {
+                    charSequence37 = (decoder).readString(((Utf8) oldString37));
+                } else {
+                    charSequence37 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, charSequence37);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F37': "+ unionIndex37));
+            }
+        }
+        int unionIndex38 = (decoder.readIndex());
+        if (unionIndex38 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, null);
+        } else {
+            if (unionIndex38 == 1) {
+                Utf8 charSequence38;
+                Object oldString38 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(38);
+                if (oldString38 instanceof Utf8) {
+                    charSequence38 = (decoder).readString(((Utf8) oldString38));
+                } else {
+                    charSequence38 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, charSequence38);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F38': "+ unionIndex38));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex39 = (decoder.readIndex());
+        if (unionIndex39 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, null);
+        } else {
+            if (unionIndex39 == 1) {
+                Utf8 charSequence39;
+                Object oldString39 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(39);
+                if (oldString39 instanceof Utf8) {
+                    charSequence39 = (decoder).readString(((Utf8) oldString39));
+                } else {
+                    charSequence39 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, charSequence39);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F39': "+ unionIndex39));
+            }
+        }
+        int unionIndex40 = (decoder.readIndex());
+        if (unionIndex40 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, null);
+        } else {
+            if (unionIndex40 == 1) {
+                Utf8 charSequence40;
+                Object oldString40 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(40);
+                if (oldString40 instanceof Utf8) {
+                    charSequence40 = (decoder).readString(((Utf8) oldString40));
+                } else {
+                    charSequence40 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, charSequence40);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F40': "+ unionIndex40));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex41 = (decoder.readIndex());
+        if (unionIndex41 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, null);
+        } else {
+            if (unionIndex41 == 1) {
+                Utf8 charSequence41;
+                Object oldString41 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(41);
+                if (oldString41 instanceof Utf8) {
+                    charSequence41 = (decoder).readString(((Utf8) oldString41));
+                } else {
+                    charSequence41 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, charSequence41);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F41': "+ unionIndex41));
+            }
+        }
+        int unionIndex42 = (decoder.readIndex());
+        if (unionIndex42 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, null);
+        } else {
+            if (unionIndex42 == 1) {
+                Utf8 charSequence42;
+                Object oldString42 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(42);
+                if (oldString42 instanceof Utf8) {
+                    charSequence42 = (decoder).readString(((Utf8) oldString42));
+                } else {
+                    charSequence42 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, charSequence42);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F42': "+ unionIndex42));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex43 = (decoder.readIndex());
+        if (unionIndex43 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, null);
+        } else {
+            if (unionIndex43 == 1) {
+                Utf8 charSequence43;
+                Object oldString43 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(43);
+                if (oldString43 instanceof Utf8) {
+                    charSequence43 = (decoder).readString(((Utf8) oldString43));
+                } else {
+                    charSequence43 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, charSequence43);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F43': "+ unionIndex43));
+            }
+        }
+        int unionIndex44 = (decoder.readIndex());
+        if (unionIndex44 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, null);
+        } else {
+            if (unionIndex44 == 1) {
+                Utf8 charSequence44;
+                Object oldString44 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(44);
+                if (oldString44 instanceof Utf8) {
+                    charSequence44 = (decoder).readString(((Utf8) oldString44));
+                } else {
+                    charSequence44 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, charSequence44);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F44': "+ unionIndex44));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex45 = (decoder.readIndex());
+        if (unionIndex45 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, null);
+        } else {
+            if (unionIndex45 == 1) {
+                Utf8 charSequence45;
+                Object oldString45 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(45);
+                if (oldString45 instanceof Utf8) {
+                    charSequence45 = (decoder).readString(((Utf8) oldString45));
+                } else {
+                    charSequence45 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, charSequence45);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F45': "+ unionIndex45));
+            }
+        }
+        int unionIndex46 = (decoder.readIndex());
+        if (unionIndex46 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, null);
+        } else {
+            if (unionIndex46 == 1) {
+                Utf8 charSequence46;
+                Object oldString46 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(46);
+                if (oldString46 instanceof Utf8) {
+                    charSequence46 = (decoder).readString(((Utf8) oldString46));
+                } else {
+                    charSequence46 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, charSequence46);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F46': "+ unionIndex46));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex47 = (decoder.readIndex());
+        if (unionIndex47 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, null);
+        } else {
+            if (unionIndex47 == 1) {
+                Utf8 charSequence47;
+                Object oldString47 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(47);
+                if (oldString47 instanceof Utf8) {
+                    charSequence47 = (decoder).readString(((Utf8) oldString47));
+                } else {
+                    charSequence47 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, charSequence47);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F47': "+ unionIndex47));
+            }
+        }
+        int unionIndex48 = (decoder.readIndex());
+        if (unionIndex48 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, null);
+        } else {
+            if (unionIndex48 == 1) {
+                Utf8 charSequence48;
+                Object oldString48 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(48);
+                if (oldString48 instanceof Utf8) {
+                    charSequence48 = (decoder).readString(((Utf8) oldString48));
+                } else {
+                    charSequence48 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, charSequence48);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F48': "+ unionIndex48));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex49 = (decoder.readIndex());
+        if (unionIndex49 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, null);
+        } else {
+            if (unionIndex49 == 1) {
+                Utf8 charSequence49;
+                Object oldString49 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(49);
+                if (oldString49 instanceof Utf8) {
+                    charSequence49 = (decoder).readString(((Utf8) oldString49));
+                } else {
+                    charSequence49 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, charSequence49);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F49': "+ unionIndex49));
+            }
+        }
+        int unionIndex50 = (decoder.readIndex());
+        if (unionIndex50 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, null);
+        } else {
+            if (unionIndex50 == 1) {
+                Utf8 charSequence50;
+                Object oldString50 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(50);
+                if (oldString50 instanceof Utf8) {
+                    charSequence50 = (decoder).readString(((Utf8) oldString50));
+                } else {
+                    charSequence50 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, charSequence50);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F50': "+ unionIndex50));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex51 = (decoder.readIndex());
+        if (unionIndex51 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, null);
+        } else {
+            if (unionIndex51 == 1) {
+                Utf8 charSequence51;
+                Object oldString51 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(51);
+                if (oldString51 instanceof Utf8) {
+                    charSequence51 = (decoder).readString(((Utf8) oldString51));
+                } else {
+                    charSequence51 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, charSequence51);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F51': "+ unionIndex51));
+            }
+        }
+        int unionIndex52 = (decoder.readIndex());
+        if (unionIndex52 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, null);
+        } else {
+            if (unionIndex52 == 1) {
+                Utf8 charSequence52;
+                Object oldString52 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(52);
+                if (oldString52 instanceof Utf8) {
+                    charSequence52 = (decoder).readString(((Utf8) oldString52));
+                } else {
+                    charSequence52 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, charSequence52);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F52': "+ unionIndex52));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex53 = (decoder.readIndex());
+        if (unionIndex53 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, null);
+        } else {
+            if (unionIndex53 == 1) {
+                Utf8 charSequence53;
+                Object oldString53 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(53);
+                if (oldString53 instanceof Utf8) {
+                    charSequence53 = (decoder).readString(((Utf8) oldString53));
+                } else {
+                    charSequence53 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, charSequence53);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F53': "+ unionIndex53));
+            }
+        }
+        int unionIndex54 = (decoder.readIndex());
+        if (unionIndex54 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, null);
+        } else {
+            if (unionIndex54 == 1) {
+                Utf8 charSequence54;
+                Object oldString54 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(54);
+                if (oldString54 instanceof Utf8) {
+                    charSequence54 = (decoder).readString(((Utf8) oldString54));
+                } else {
+                    charSequence54 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, charSequence54);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F54': "+ unionIndex54));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex55 = (decoder.readIndex());
+        if (unionIndex55 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, null);
+        } else {
+            if (unionIndex55 == 1) {
+                Utf8 charSequence55;
+                Object oldString55 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(55);
+                if (oldString55 instanceof Utf8) {
+                    charSequence55 = (decoder).readString(((Utf8) oldString55));
+                } else {
+                    charSequence55 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, charSequence55);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F55': "+ unionIndex55));
+            }
+        }
+        int unionIndex56 = (decoder.readIndex());
+        if (unionIndex56 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, null);
+        } else {
+            if (unionIndex56 == 1) {
+                Utf8 charSequence56;
+                Object oldString56 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(56);
+                if (oldString56 instanceof Utf8) {
+                    charSequence56 = (decoder).readString(((Utf8) oldString56));
+                } else {
+                    charSequence56 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, charSequence56);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F56': "+ unionIndex56));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex57 = (decoder.readIndex());
+        if (unionIndex57 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, null);
+        } else {
+            if (unionIndex57 == 1) {
+                Utf8 charSequence57;
+                Object oldString57 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(57);
+                if (oldString57 instanceof Utf8) {
+                    charSequence57 = (decoder).readString(((Utf8) oldString57));
+                } else {
+                    charSequence57 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, charSequence57);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F57': "+ unionIndex57));
+            }
+        }
+        int unionIndex58 = (decoder.readIndex());
+        if (unionIndex58 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, null);
+        } else {
+            if (unionIndex58 == 1) {
+                Utf8 charSequence58;
+                Object oldString58 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(58);
+                if (oldString58 instanceof Utf8) {
+                    charSequence58 = (decoder).readString(((Utf8) oldString58));
+                } else {
+                    charSequence58 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, charSequence58);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F58': "+ unionIndex58));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex59 = (decoder.readIndex());
+        if (unionIndex59 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, null);
+        } else {
+            if (unionIndex59 == 1) {
+                Utf8 charSequence59;
+                Object oldString59 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(59);
+                if (oldString59 instanceof Utf8) {
+                    charSequence59 = (decoder).readString(((Utf8) oldString59));
+                } else {
+                    charSequence59 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, charSequence59);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F59': "+ unionIndex59));
+            }
+        }
+        int unionIndex60 = (decoder.readIndex());
+        if (unionIndex60 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, null);
+        } else {
+            if (unionIndex60 == 1) {
+                Utf8 charSequence60;
+                Object oldString60 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(60);
+                if (oldString60 instanceof Utf8) {
+                    charSequence60 = (decoder).readString(((Utf8) oldString60));
+                } else {
+                    charSequence60 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, charSequence60);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F60': "+ unionIndex60));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex61 = (decoder.readIndex());
+        if (unionIndex61 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, null);
+        } else {
+            if (unionIndex61 == 1) {
+                Utf8 charSequence61;
+                Object oldString61 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(61);
+                if (oldString61 instanceof Utf8) {
+                    charSequence61 = (decoder).readString(((Utf8) oldString61));
+                } else {
+                    charSequence61 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, charSequence61);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F61': "+ unionIndex61));
+            }
+        }
+        int unionIndex62 = (decoder.readIndex());
+        if (unionIndex62 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, null);
+        } else {
+            if (unionIndex62 == 1) {
+                Utf8 charSequence62;
+                Object oldString62 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(62);
+                if (oldString62 instanceof Utf8) {
+                    charSequence62 = (decoder).readString(((Utf8) oldString62));
+                } else {
+                    charSequence62 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, charSequence62);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F62': "+ unionIndex62));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex63 = (decoder.readIndex());
+        if (unionIndex63 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, null);
+        } else {
+            if (unionIndex63 == 1) {
+                Utf8 charSequence63;
+                Object oldString63 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(63);
+                if (oldString63 instanceof Utf8) {
+                    charSequence63 = (decoder).readString(((Utf8) oldString63));
+                } else {
+                    charSequence63 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, charSequence63);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F63': "+ unionIndex63));
+            }
+        }
+        int unionIndex64 = (decoder.readIndex());
+        if (unionIndex64 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, null);
+        } else {
+            if (unionIndex64 == 1) {
+                Utf8 charSequence64;
+                Object oldString64 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(64);
+                if (oldString64 instanceof Utf8) {
+                    charSequence64 = (decoder).readString(((Utf8) oldString64));
+                } else {
+                    charSequence64 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, charSequence64);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F64': "+ unionIndex64));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex65 = (decoder.readIndex());
+        if (unionIndex65 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, null);
+        } else {
+            if (unionIndex65 == 1) {
+                Utf8 charSequence65;
+                Object oldString65 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(65);
+                if (oldString65 instanceof Utf8) {
+                    charSequence65 = (decoder).readString(((Utf8) oldString65));
+                } else {
+                    charSequence65 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, charSequence65);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F65': "+ unionIndex65));
+            }
+        }
+        int unionIndex66 = (decoder.readIndex());
+        if (unionIndex66 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, null);
+        } else {
+            if (unionIndex66 == 1) {
+                Utf8 charSequence66;
+                Object oldString66 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(66);
+                if (oldString66 instanceof Utf8) {
+                    charSequence66 = (decoder).readString(((Utf8) oldString66));
+                } else {
+                    charSequence66 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, charSequence66);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F66': "+ unionIndex66));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex67 = (decoder.readIndex());
+        if (unionIndex67 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, null);
+        } else {
+            if (unionIndex67 == 1) {
+                Utf8 charSequence67;
+                Object oldString67 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(67);
+                if (oldString67 instanceof Utf8) {
+                    charSequence67 = (decoder).readString(((Utf8) oldString67));
+                } else {
+                    charSequence67 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, charSequence67);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F67': "+ unionIndex67));
+            }
+        }
+        int unionIndex68 = (decoder.readIndex());
+        if (unionIndex68 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, null);
+        } else {
+            if (unionIndex68 == 1) {
+                Utf8 charSequence68;
+                Object oldString68 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(68);
+                if (oldString68 instanceof Utf8) {
+                    charSequence68 = (decoder).readString(((Utf8) oldString68));
+                } else {
+                    charSequence68 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, charSequence68);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F68': "+ unionIndex68));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex69 = (decoder.readIndex());
+        if (unionIndex69 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, null);
+        } else {
+            if (unionIndex69 == 1) {
+                Utf8 charSequence69;
+                Object oldString69 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(69);
+                if (oldString69 instanceof Utf8) {
+                    charSequence69 = (decoder).readString(((Utf8) oldString69));
+                } else {
+                    charSequence69 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, charSequence69);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F69': "+ unionIndex69));
+            }
+        }
+        int unionIndex70 = (decoder.readIndex());
+        if (unionIndex70 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, null);
+        } else {
+            if (unionIndex70 == 1) {
+                Utf8 charSequence70;
+                Object oldString70 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(70);
+                if (oldString70 instanceof Utf8) {
+                    charSequence70 = (decoder).readString(((Utf8) oldString70));
+                } else {
+                    charSequence70 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, charSequence70);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F70': "+ unionIndex70));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex71 = (decoder.readIndex());
+        if (unionIndex71 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, null);
+        } else {
+            if (unionIndex71 == 1) {
+                Utf8 charSequence71;
+                Object oldString71 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(71);
+                if (oldString71 instanceof Utf8) {
+                    charSequence71 = (decoder).readString(((Utf8) oldString71));
+                } else {
+                    charSequence71 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, charSequence71);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F71': "+ unionIndex71));
+            }
+        }
+        int unionIndex72 = (decoder.readIndex());
+        if (unionIndex72 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, null);
+        } else {
+            if (unionIndex72 == 1) {
+                Utf8 charSequence72;
+                Object oldString72 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(72);
+                if (oldString72 instanceof Utf8) {
+                    charSequence72 = (decoder).readString(((Utf8) oldString72));
+                } else {
+                    charSequence72 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, charSequence72);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F72': "+ unionIndex72));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex73 = (decoder.readIndex());
+        if (unionIndex73 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, null);
+        } else {
+            if (unionIndex73 == 1) {
+                Utf8 charSequence73;
+                Object oldString73 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(73);
+                if (oldString73 instanceof Utf8) {
+                    charSequence73 = (decoder).readString(((Utf8) oldString73));
+                } else {
+                    charSequence73 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, charSequence73);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F73': "+ unionIndex73));
+            }
+        }
+        int unionIndex74 = (decoder.readIndex());
+        if (unionIndex74 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, null);
+        } else {
+            if (unionIndex74 == 1) {
+                Utf8 charSequence74;
+                Object oldString74 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(74);
+                if (oldString74 instanceof Utf8) {
+                    charSequence74 = (decoder).readString(((Utf8) oldString74));
+                } else {
+                    charSequence74 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, charSequence74);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F74': "+ unionIndex74));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex75 = (decoder.readIndex());
+        if (unionIndex75 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, null);
+        } else {
+            if (unionIndex75 == 1) {
+                Utf8 charSequence75;
+                Object oldString75 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(75);
+                if (oldString75 instanceof Utf8) {
+                    charSequence75 = (decoder).readString(((Utf8) oldString75));
+                } else {
+                    charSequence75 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, charSequence75);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F75': "+ unionIndex75));
+            }
+        }
+        int unionIndex76 = (decoder.readIndex());
+        if (unionIndex76 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, null);
+        } else {
+            if (unionIndex76 == 1) {
+                Utf8 charSequence76;
+                Object oldString76 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(76);
+                if (oldString76 instanceof Utf8) {
+                    charSequence76 = (decoder).readString(((Utf8) oldString76));
+                } else {
+                    charSequence76 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, charSequence76);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F76': "+ unionIndex76));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex77 = (decoder.readIndex());
+        if (unionIndex77 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, null);
+        } else {
+            if (unionIndex77 == 1) {
+                Utf8 charSequence77;
+                Object oldString77 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(77);
+                if (oldString77 instanceof Utf8) {
+                    charSequence77 = (decoder).readString(((Utf8) oldString77));
+                } else {
+                    charSequence77 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, charSequence77);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F77': "+ unionIndex77));
+            }
+        }
+        int unionIndex78 = (decoder.readIndex());
+        if (unionIndex78 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, null);
+        } else {
+            if (unionIndex78 == 1) {
+                Utf8 charSequence78;
+                Object oldString78 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(78);
+                if (oldString78 instanceof Utf8) {
+                    charSequence78 = (decoder).readString(((Utf8) oldString78));
+                } else {
+                    charSequence78 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, charSequence78);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F78': "+ unionIndex78));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex79 = (decoder.readIndex());
+        if (unionIndex79 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, null);
+        } else {
+            if (unionIndex79 == 1) {
+                Utf8 charSequence79;
+                Object oldString79 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(79);
+                if (oldString79 instanceof Utf8) {
+                    charSequence79 = (decoder).readString(((Utf8) oldString79));
+                } else {
+                    charSequence79 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, charSequence79);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F79': "+ unionIndex79));
+            }
+        }
+        int unionIndex80 = (decoder.readIndex());
+        if (unionIndex80 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, null);
+        } else {
+            if (unionIndex80 == 1) {
+                Utf8 charSequence80;
+                Object oldString80 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(80);
+                if (oldString80 instanceof Utf8) {
+                    charSequence80 = (decoder).readString(((Utf8) oldString80));
+                } else {
+                    charSequence80 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, charSequence80);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F80': "+ unionIndex80));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex81 = (decoder.readIndex());
+        if (unionIndex81 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, null);
+        } else {
+            if (unionIndex81 == 1) {
+                Utf8 charSequence81;
+                Object oldString81 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(81);
+                if (oldString81 instanceof Utf8) {
+                    charSequence81 = (decoder).readString(((Utf8) oldString81));
+                } else {
+                    charSequence81 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, charSequence81);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F81': "+ unionIndex81));
+            }
+        }
+        int unionIndex82 = (decoder.readIndex());
+        if (unionIndex82 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, null);
+        } else {
+            if (unionIndex82 == 1) {
+                Utf8 charSequence82;
+                Object oldString82 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(82);
+                if (oldString82 instanceof Utf8) {
+                    charSequence82 = (decoder).readString(((Utf8) oldString82));
+                } else {
+                    charSequence82 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, charSequence82);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F82': "+ unionIndex82));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex83 = (decoder.readIndex());
+        if (unionIndex83 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, null);
+        } else {
+            if (unionIndex83 == 1) {
+                Utf8 charSequence83;
+                Object oldString83 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(83);
+                if (oldString83 instanceof Utf8) {
+                    charSequence83 = (decoder).readString(((Utf8) oldString83));
+                } else {
+                    charSequence83 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, charSequence83);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F83': "+ unionIndex83));
+            }
+        }
+        int unionIndex84 = (decoder.readIndex());
+        if (unionIndex84 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, null);
+        } else {
+            if (unionIndex84 == 1) {
+                Utf8 charSequence84;
+                Object oldString84 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(84);
+                if (oldString84 instanceof Utf8) {
+                    charSequence84 = (decoder).readString(((Utf8) oldString84));
+                } else {
+                    charSequence84 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, charSequence84);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F84': "+ unionIndex84));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex85 = (decoder.readIndex());
+        if (unionIndex85 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, null);
+        } else {
+            if (unionIndex85 == 1) {
+                Utf8 charSequence85;
+                Object oldString85 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(85);
+                if (oldString85 instanceof Utf8) {
+                    charSequence85 = (decoder).readString(((Utf8) oldString85));
+                } else {
+                    charSequence85 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, charSequence85);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F85': "+ unionIndex85));
+            }
+        }
+        int unionIndex86 = (decoder.readIndex());
+        if (unionIndex86 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, null);
+        } else {
+            if (unionIndex86 == 1) {
+                Utf8 charSequence86;
+                Object oldString86 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(86);
+                if (oldString86 instanceof Utf8) {
+                    charSequence86 = (decoder).readString(((Utf8) oldString86));
+                } else {
+                    charSequence86 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, charSequence86);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F86': "+ unionIndex86));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex87 = (decoder.readIndex());
+        if (unionIndex87 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, null);
+        } else {
+            if (unionIndex87 == 1) {
+                Utf8 charSequence87;
+                Object oldString87 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(87);
+                if (oldString87 instanceof Utf8) {
+                    charSequence87 = (decoder).readString(((Utf8) oldString87));
+                } else {
+                    charSequence87 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, charSequence87);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F87': "+ unionIndex87));
+            }
+        }
+        int unionIndex88 = (decoder.readIndex());
+        if (unionIndex88 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, null);
+        } else {
+            if (unionIndex88 == 1) {
+                Utf8 charSequence88;
+                Object oldString88 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(88);
+                if (oldString88 instanceof Utf8) {
+                    charSequence88 = (decoder).readString(((Utf8) oldString88));
+                } else {
+                    charSequence88 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, charSequence88);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F88': "+ unionIndex88));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex89 = (decoder.readIndex());
+        if (unionIndex89 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, null);
+        } else {
+            if (unionIndex89 == 1) {
+                Utf8 charSequence89;
+                Object oldString89 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(89);
+                if (oldString89 instanceof Utf8) {
+                    charSequence89 = (decoder).readString(((Utf8) oldString89));
+                } else {
+                    charSequence89 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, charSequence89);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F89': "+ unionIndex89));
+            }
+        }
+        int unionIndex90 = (decoder.readIndex());
+        if (unionIndex90 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, null);
+        } else {
+            if (unionIndex90 == 1) {
+                Utf8 charSequence90;
+                Object oldString90 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(90);
+                if (oldString90 instanceof Utf8) {
+                    charSequence90 = (decoder).readString(((Utf8) oldString90));
+                } else {
+                    charSequence90 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, charSequence90);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F90': "+ unionIndex90));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex91 = (decoder.readIndex());
+        if (unionIndex91 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, null);
+        } else {
+            if (unionIndex91 == 1) {
+                Utf8 charSequence91;
+                Object oldString91 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(91);
+                if (oldString91 instanceof Utf8) {
+                    charSequence91 = (decoder).readString(((Utf8) oldString91));
+                } else {
+                    charSequence91 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, charSequence91);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F91': "+ unionIndex91));
+            }
+        }
+        int unionIndex92 = (decoder.readIndex());
+        if (unionIndex92 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, null);
+        } else {
+            if (unionIndex92 == 1) {
+                Utf8 charSequence92;
+                Object oldString92 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(92);
+                if (oldString92 instanceof Utf8) {
+                    charSequence92 = (decoder).readString(((Utf8) oldString92));
+                } else {
+                    charSequence92 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, charSequence92);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F92': "+ unionIndex92));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex93 = (decoder.readIndex());
+        if (unionIndex93 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, null);
+        } else {
+            if (unionIndex93 == 1) {
+                Utf8 charSequence93;
+                Object oldString93 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(93);
+                if (oldString93 instanceof Utf8) {
+                    charSequence93 = (decoder).readString(((Utf8) oldString93));
+                } else {
+                    charSequence93 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, charSequence93);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F93': "+ unionIndex93));
+            }
+        }
+        int unionIndex94 = (decoder.readIndex());
+        if (unionIndex94 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, null);
+        } else {
+            if (unionIndex94 == 1) {
+                Utf8 charSequence94;
+                Object oldString94 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(94);
+                if (oldString94 instanceof Utf8) {
+                    charSequence94 = (decoder).readString(((Utf8) oldString94));
+                } else {
+                    charSequence94 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, charSequence94);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F94': "+ unionIndex94));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex95 = (decoder.readIndex());
+        if (unionIndex95 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, null);
+        } else {
+            if (unionIndex95 == 1) {
+                Utf8 charSequence95;
+                Object oldString95 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(95);
+                if (oldString95 instanceof Utf8) {
+                    charSequence95 = (decoder).readString(((Utf8) oldString95));
+                } else {
+                    charSequence95 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, charSequence95);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F95': "+ unionIndex95));
+            }
+        }
+        int unionIndex96 = (decoder.readIndex());
+        if (unionIndex96 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, null);
+        } else {
+            if (unionIndex96 == 1) {
+                Utf8 charSequence96;
+                Object oldString96 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(96);
+                if (oldString96 instanceof Utf8) {
+                    charSequence96 = (decoder).readString(((Utf8) oldString96));
+                } else {
+                    charSequence96 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, charSequence96);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F96': "+ unionIndex96));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex97 = (decoder.readIndex());
+        if (unionIndex97 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, null);
+        } else {
+            if (unionIndex97 == 1) {
+                Utf8 charSequence97;
+                Object oldString97 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(97);
+                if (oldString97 instanceof Utf8) {
+                    charSequence97 = (decoder).readString(((Utf8) oldString97));
+                } else {
+                    charSequence97 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, charSequence97);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F97': "+ unionIndex97));
+            }
+        }
+        int unionIndex98 = (decoder.readIndex());
+        if (unionIndex98 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, null);
+        } else {
+            if (unionIndex98 == 1) {
+                Utf8 charSequence98;
+                Object oldString98 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(98);
+                if (oldString98 instanceof Utf8) {
+                    charSequence98 = (decoder).readString(((Utf8) oldString98));
+                } else {
+                    charSequence98 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, charSequence98);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F98': "+ unionIndex98));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex99 = (decoder.readIndex());
+        if (unionIndex99 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, null);
+        } else {
+            if (unionIndex99 == 1) {
+                Utf8 charSequence99;
+                Object oldString99 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(99);
+                if (oldString99 instanceof Utf8) {
+                    charSequence99 = (decoder).readString(((Utf8) oldString99));
+                } else {
+                    charSequence99 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, charSequence99);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F99': "+ unionIndex99));
+            }
+        }
+        int unionIndex100 = (decoder.readIndex());
+        if (unionIndex100 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, null);
+        } else {
+            if (unionIndex100 == 1) {
+                Utf8 charSequence100;
+                Object oldString100 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(100);
+                if (oldString100 instanceof Utf8) {
+                    charSequence100 = (decoder).readString(((Utf8) oldString100));
+                } else {
+                    charSequence100 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, charSequence100);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F100': "+ unionIndex100));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex101 = (decoder.readIndex());
+        if (unionIndex101 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, null);
+        } else {
+            if (unionIndex101 == 1) {
+                Utf8 charSequence101;
+                Object oldString101 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(101);
+                if (oldString101 instanceof Utf8) {
+                    charSequence101 = (decoder).readString(((Utf8) oldString101));
+                } else {
+                    charSequence101 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, charSequence101);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F101': "+ unionIndex101));
+            }
+        }
+        int unionIndex102 = (decoder.readIndex());
+        if (unionIndex102 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, null);
+        } else {
+            if (unionIndex102 == 1) {
+                Utf8 charSequence102;
+                Object oldString102 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(102);
+                if (oldString102 instanceof Utf8) {
+                    charSequence102 = (decoder).readString(((Utf8) oldString102));
+                } else {
+                    charSequence102 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, charSequence102);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F102': "+ unionIndex102));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex103 = (decoder.readIndex());
+        if (unionIndex103 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, null);
+        } else {
+            if (unionIndex103 == 1) {
+                Utf8 charSequence103;
+                Object oldString103 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(103);
+                if (oldString103 instanceof Utf8) {
+                    charSequence103 = (decoder).readString(((Utf8) oldString103));
+                } else {
+                    charSequence103 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, charSequence103);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F103': "+ unionIndex103));
+            }
+        }
+        int unionIndex104 = (decoder.readIndex());
+        if (unionIndex104 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, null);
+        } else {
+            if (unionIndex104 == 1) {
+                Utf8 charSequence104;
+                Object oldString104 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(104);
+                if (oldString104 instanceof Utf8) {
+                    charSequence104 = (decoder).readString(((Utf8) oldString104));
+                } else {
+                    charSequence104 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, charSequence104);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F104': "+ unionIndex104));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex105 = (decoder.readIndex());
+        if (unionIndex105 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, null);
+        } else {
+            if (unionIndex105 == 1) {
+                Utf8 charSequence105;
+                Object oldString105 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(105);
+                if (oldString105 instanceof Utf8) {
+                    charSequence105 = (decoder).readString(((Utf8) oldString105));
+                } else {
+                    charSequence105 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, charSequence105);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F105': "+ unionIndex105));
+            }
+        }
+        int unionIndex106 = (decoder.readIndex());
+        if (unionIndex106 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, null);
+        } else {
+            if (unionIndex106 == 1) {
+                Utf8 charSequence106;
+                Object oldString106 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(106);
+                if (oldString106 instanceof Utf8) {
+                    charSequence106 = (decoder).readString(((Utf8) oldString106));
+                } else {
+                    charSequence106 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, charSequence106);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F106': "+ unionIndex106));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex107 = (decoder.readIndex());
+        if (unionIndex107 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, null);
+        } else {
+            if (unionIndex107 == 1) {
+                Utf8 charSequence107;
+                Object oldString107 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(107);
+                if (oldString107 instanceof Utf8) {
+                    charSequence107 = (decoder).readString(((Utf8) oldString107));
+                } else {
+                    charSequence107 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, charSequence107);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F107': "+ unionIndex107));
+            }
+        }
+        int unionIndex108 = (decoder.readIndex());
+        if (unionIndex108 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, null);
+        } else {
+            if (unionIndex108 == 1) {
+                Utf8 charSequence108;
+                Object oldString108 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(108);
+                if (oldString108 instanceof Utf8) {
+                    charSequence108 = (decoder).readString(((Utf8) oldString108));
+                } else {
+                    charSequence108 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, charSequence108);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F108': "+ unionIndex108));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex109 = (decoder.readIndex());
+        if (unionIndex109 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, null);
+        } else {
+            if (unionIndex109 == 1) {
+                Utf8 charSequence109;
+                Object oldString109 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(109);
+                if (oldString109 instanceof Utf8) {
+                    charSequence109 = (decoder).readString(((Utf8) oldString109));
+                } else {
+                    charSequence109 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, charSequence109);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F109': "+ unionIndex109));
+            }
+        }
+        int unionIndex110 = (decoder.readIndex());
+        if (unionIndex110 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, null);
+        } else {
+            if (unionIndex110 == 1) {
+                Utf8 charSequence110;
+                Object oldString110 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(110);
+                if (oldString110 instanceof Utf8) {
+                    charSequence110 = (decoder).readString(((Utf8) oldString110));
+                } else {
+                    charSequence110 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, charSequence110);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F110': "+ unionIndex110));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex111 = (decoder.readIndex());
+        if (unionIndex111 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, null);
+        } else {
+            if (unionIndex111 == 1) {
+                Utf8 charSequence111;
+                Object oldString111 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(111);
+                if (oldString111 instanceof Utf8) {
+                    charSequence111 = (decoder).readString(((Utf8) oldString111));
+                } else {
+                    charSequence111 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, charSequence111);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F111': "+ unionIndex111));
+            }
+        }
+        int unionIndex112 = (decoder.readIndex());
+        if (unionIndex112 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, null);
+        } else {
+            if (unionIndex112 == 1) {
+                Utf8 charSequence112;
+                Object oldString112 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(112);
+                if (oldString112 instanceof Utf8) {
+                    charSequence112 = (decoder).readString(((Utf8) oldString112));
+                } else {
+                    charSequence112 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, charSequence112);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F112': "+ unionIndex112));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex113 = (decoder.readIndex());
+        if (unionIndex113 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, null);
+        } else {
+            if (unionIndex113 == 1) {
+                Utf8 charSequence113;
+                Object oldString113 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(113);
+                if (oldString113 instanceof Utf8) {
+                    charSequence113 = (decoder).readString(((Utf8) oldString113));
+                } else {
+                    charSequence113 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, charSequence113);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F113': "+ unionIndex113));
+            }
+        }
+        int unionIndex114 = (decoder.readIndex());
+        if (unionIndex114 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, null);
+        } else {
+            if (unionIndex114 == 1) {
+                Utf8 charSequence114;
+                Object oldString114 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(114);
+                if (oldString114 instanceof Utf8) {
+                    charSequence114 = (decoder).readString(((Utf8) oldString114));
+                } else {
+                    charSequence114 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, charSequence114);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F114': "+ unionIndex114));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex115 = (decoder.readIndex());
+        if (unionIndex115 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, null);
+        } else {
+            if (unionIndex115 == 1) {
+                Utf8 charSequence115;
+                Object oldString115 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(115);
+                if (oldString115 instanceof Utf8) {
+                    charSequence115 = (decoder).readString(((Utf8) oldString115));
+                } else {
+                    charSequence115 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, charSequence115);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F115': "+ unionIndex115));
+            }
+        }
+        int unionIndex116 = (decoder.readIndex());
+        if (unionIndex116 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, null);
+        } else {
+            if (unionIndex116 == 1) {
+                Utf8 charSequence116;
+                Object oldString116 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(116);
+                if (oldString116 instanceof Utf8) {
+                    charSequence116 = (decoder).readString(((Utf8) oldString116));
+                } else {
+                    charSequence116 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, charSequence116);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F116': "+ unionIndex116));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex117 = (decoder.readIndex());
+        if (unionIndex117 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, null);
+        } else {
+            if (unionIndex117 == 1) {
+                Utf8 charSequence117;
+                Object oldString117 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(117);
+                if (oldString117 instanceof Utf8) {
+                    charSequence117 = (decoder).readString(((Utf8) oldString117));
+                } else {
+                    charSequence117 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, charSequence117);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F117': "+ unionIndex117));
+            }
+        }
+        int unionIndex118 = (decoder.readIndex());
+        if (unionIndex118 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, null);
+        } else {
+            if (unionIndex118 == 1) {
+                Utf8 charSequence118;
+                Object oldString118 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(118);
+                if (oldString118 instanceof Utf8) {
+                    charSequence118 = (decoder).readString(((Utf8) oldString118));
+                } else {
+                    charSequence118 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, charSequence118);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F118': "+ unionIndex118));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex119 = (decoder.readIndex());
+        if (unionIndex119 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, null);
+        } else {
+            if (unionIndex119 == 1) {
+                Utf8 charSequence119;
+                Object oldString119 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(119);
+                if (oldString119 instanceof Utf8) {
+                    charSequence119 = (decoder).readString(((Utf8) oldString119));
+                } else {
+                    charSequence119 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, charSequence119);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F119': "+ unionIndex119));
+            }
+        }
+        int unionIndex120 = (decoder.readIndex());
+        if (unionIndex120 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, null);
+        } else {
+            if (unionIndex120 == 1) {
+                Utf8 charSequence120;
+                Object oldString120 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(120);
+                if (oldString120 instanceof Utf8) {
+                    charSequence120 = (decoder).readString(((Utf8) oldString120));
+                } else {
+                    charSequence120 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, charSequence120);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F120': "+ unionIndex120));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex121 = (decoder.readIndex());
+        if (unionIndex121 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, null);
+        } else {
+            if (unionIndex121 == 1) {
+                Utf8 charSequence121;
+                Object oldString121 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(121);
+                if (oldString121 instanceof Utf8) {
+                    charSequence121 = (decoder).readString(((Utf8) oldString121));
+                } else {
+                    charSequence121 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, charSequence121);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F121': "+ unionIndex121));
+            }
+        }
+        int unionIndex122 = (decoder.readIndex());
+        if (unionIndex122 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, null);
+        } else {
+            if (unionIndex122 == 1) {
+                Utf8 charSequence122;
+                Object oldString122 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(122);
+                if (oldString122 instanceof Utf8) {
+                    charSequence122 = (decoder).readString(((Utf8) oldString122));
+                } else {
+                    charSequence122 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, charSequence122);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F122': "+ unionIndex122));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex123 = (decoder.readIndex());
+        if (unionIndex123 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, null);
+        } else {
+            if (unionIndex123 == 1) {
+                Utf8 charSequence123;
+                Object oldString123 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(123);
+                if (oldString123 instanceof Utf8) {
+                    charSequence123 = (decoder).readString(((Utf8) oldString123));
+                } else {
+                    charSequence123 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, charSequence123);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F123': "+ unionIndex123));
+            }
+        }
+        int unionIndex124 = (decoder.readIndex());
+        if (unionIndex124 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, null);
+        } else {
+            if (unionIndex124 == 1) {
+                Utf8 charSequence124;
+                Object oldString124 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(124);
+                if (oldString124 instanceof Utf8) {
+                    charSequence124 = (decoder).readString(((Utf8) oldString124));
+                } else {
+                    charSequence124 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, charSequence124);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F124': "+ unionIndex124));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex125 = (decoder.readIndex());
+        if (unionIndex125 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, null);
+        } else {
+            if (unionIndex125 == 1) {
+                Utf8 charSequence125;
+                Object oldString125 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(125);
+                if (oldString125 instanceof Utf8) {
+                    charSequence125 = (decoder).readString(((Utf8) oldString125));
+                } else {
+                    charSequence125 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, charSequence125);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F125': "+ unionIndex125));
+            }
+        }
+        int unionIndex126 = (decoder.readIndex());
+        if (unionIndex126 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, null);
+        } else {
+            if (unionIndex126 == 1) {
+                Utf8 charSequence126;
+                Object oldString126 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(126);
+                if (oldString126 instanceof Utf8) {
+                    charSequence126 = (decoder).readString(((Utf8) oldString126));
+                } else {
+                    charSequence126 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, charSequence126);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F126': "+ unionIndex126));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex127 = (decoder.readIndex());
+        if (unionIndex127 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, null);
+        } else {
+            if (unionIndex127 == 1) {
+                Utf8 charSequence127;
+                Object oldString127 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(127);
+                if (oldString127 instanceof Utf8) {
+                    charSequence127 = (decoder).readString(((Utf8) oldString127));
+                } else {
+                    charSequence127 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, charSequence127);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F127': "+ unionIndex127));
+            }
+        }
+        int unionIndex128 = (decoder.readIndex());
+        if (unionIndex128 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, null);
+        } else {
+            if (unionIndex128 == 1) {
+                Utf8 charSequence128;
+                Object oldString128 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(128);
+                if (oldString128 instanceof Utf8) {
+                    charSequence128 = (decoder).readString(((Utf8) oldString128));
+                } else {
+                    charSequence128 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, charSequence128);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F128': "+ unionIndex128));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex129 = (decoder.readIndex());
+        if (unionIndex129 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, null);
+        } else {
+            if (unionIndex129 == 1) {
+                Utf8 charSequence129;
+                Object oldString129 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(129);
+                if (oldString129 instanceof Utf8) {
+                    charSequence129 = (decoder).readString(((Utf8) oldString129));
+                } else {
+                    charSequence129 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, charSequence129);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F129': "+ unionIndex129));
+            }
+        }
+        int unionIndex130 = (decoder.readIndex());
+        if (unionIndex130 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, null);
+        } else {
+            if (unionIndex130 == 1) {
+                Utf8 charSequence130;
+                Object oldString130 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(130);
+                if (oldString130 instanceof Utf8) {
+                    charSequence130 = (decoder).readString(((Utf8) oldString130));
+                } else {
+                    charSequence130 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, charSequence130);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F130': "+ unionIndex130));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex131 = (decoder.readIndex());
+        if (unionIndex131 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, null);
+        } else {
+            if (unionIndex131 == 1) {
+                Utf8 charSequence131;
+                Object oldString131 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(131);
+                if (oldString131 instanceof Utf8) {
+                    charSequence131 = (decoder).readString(((Utf8) oldString131));
+                } else {
+                    charSequence131 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, charSequence131);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F131': "+ unionIndex131));
+            }
+        }
+        int unionIndex132 = (decoder.readIndex());
+        if (unionIndex132 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, null);
+        } else {
+            if (unionIndex132 == 1) {
+                Utf8 charSequence132;
+                Object oldString132 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(132);
+                if (oldString132 instanceof Utf8) {
+                    charSequence132 = (decoder).readString(((Utf8) oldString132));
+                } else {
+                    charSequence132 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, charSequence132);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F132': "+ unionIndex132));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex133 = (decoder.readIndex());
+        if (unionIndex133 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, null);
+        } else {
+            if (unionIndex133 == 1) {
+                Utf8 charSequence133;
+                Object oldString133 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(133);
+                if (oldString133 instanceof Utf8) {
+                    charSequence133 = (decoder).readString(((Utf8) oldString133));
+                } else {
+                    charSequence133 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, charSequence133);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F133': "+ unionIndex133));
+            }
+        }
+        int unionIndex134 = (decoder.readIndex());
+        if (unionIndex134 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, null);
+        } else {
+            if (unionIndex134 == 1) {
+                Utf8 charSequence134;
+                Object oldString134 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(134);
+                if (oldString134 instanceof Utf8) {
+                    charSequence134 = (decoder).readString(((Utf8) oldString134));
+                } else {
+                    charSequence134 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, charSequence134);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F134': "+ unionIndex134));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex135 = (decoder.readIndex());
+        if (unionIndex135 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, null);
+        } else {
+            if (unionIndex135 == 1) {
+                Utf8 charSequence135;
+                Object oldString135 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(135);
+                if (oldString135 instanceof Utf8) {
+                    charSequence135 = (decoder).readString(((Utf8) oldString135));
+                } else {
+                    charSequence135 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, charSequence135);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F135': "+ unionIndex135));
+            }
+        }
+        int unionIndex136 = (decoder.readIndex());
+        if (unionIndex136 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, null);
+        } else {
+            if (unionIndex136 == 1) {
+                Utf8 charSequence136;
+                Object oldString136 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(136);
+                if (oldString136 instanceof Utf8) {
+                    charSequence136 = (decoder).readString(((Utf8) oldString136));
+                } else {
+                    charSequence136 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, charSequence136);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F136': "+ unionIndex136));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex137 = (decoder.readIndex());
+        if (unionIndex137 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, null);
+        } else {
+            if (unionIndex137 == 1) {
+                Utf8 charSequence137;
+                Object oldString137 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(137);
+                if (oldString137 instanceof Utf8) {
+                    charSequence137 = (decoder).readString(((Utf8) oldString137));
+                } else {
+                    charSequence137 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, charSequence137);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F137': "+ unionIndex137));
+            }
+        }
+        int unionIndex138 = (decoder.readIndex());
+        if (unionIndex138 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, null);
+        } else {
+            if (unionIndex138 == 1) {
+                Utf8 charSequence138;
+                Object oldString138 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(138);
+                if (oldString138 instanceof Utf8) {
+                    charSequence138 = (decoder).readString(((Utf8) oldString138));
+                } else {
+                    charSequence138 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, charSequence138);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F138': "+ unionIndex138));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex139 = (decoder.readIndex());
+        if (unionIndex139 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, null);
+        } else {
+            if (unionIndex139 == 1) {
+                Utf8 charSequence139;
+                Object oldString139 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(139);
+                if (oldString139 instanceof Utf8) {
+                    charSequence139 = (decoder).readString(((Utf8) oldString139));
+                } else {
+                    charSequence139 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, charSequence139);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F139': "+ unionIndex139));
+            }
+        }
+        int unionIndex140 = (decoder.readIndex());
+        if (unionIndex140 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, null);
+        } else {
+            if (unionIndex140 == 1) {
+                Utf8 charSequence140;
+                Object oldString140 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(140);
+                if (oldString140 instanceof Utf8) {
+                    charSequence140 = (decoder).readString(((Utf8) oldString140));
+                } else {
+                    charSequence140 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, charSequence140);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F140': "+ unionIndex140));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex141 = (decoder.readIndex());
+        if (unionIndex141 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, null);
+        } else {
+            if (unionIndex141 == 1) {
+                Utf8 charSequence141;
+                Object oldString141 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(141);
+                if (oldString141 instanceof Utf8) {
+                    charSequence141 = (decoder).readString(((Utf8) oldString141));
+                } else {
+                    charSequence141 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, charSequence141);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F141': "+ unionIndex141));
+            }
+        }
+        int unionIndex142 = (decoder.readIndex());
+        if (unionIndex142 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, null);
+        } else {
+            if (unionIndex142 == 1) {
+                Utf8 charSequence142;
+                Object oldString142 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(142);
+                if (oldString142 instanceof Utf8) {
+                    charSequence142 = (decoder).readString(((Utf8) oldString142));
+                } else {
+                    charSequence142 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, charSequence142);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F142': "+ unionIndex142));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex143 = (decoder.readIndex());
+        if (unionIndex143 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, null);
+        } else {
+            if (unionIndex143 == 1) {
+                Utf8 charSequence143;
+                Object oldString143 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(143);
+                if (oldString143 instanceof Utf8) {
+                    charSequence143 = (decoder).readString(((Utf8) oldString143));
+                } else {
+                    charSequence143 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, charSequence143);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F143': "+ unionIndex143));
+            }
+        }
+        int unionIndex144 = (decoder.readIndex());
+        if (unionIndex144 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, null);
+        } else {
+            if (unionIndex144 == 1) {
+                Utf8 charSequence144;
+                Object oldString144 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(144);
+                if (oldString144 instanceof Utf8) {
+                    charSequence144 = (decoder).readString(((Utf8) oldString144));
+                } else {
+                    charSequence144 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, charSequence144);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F144': "+ unionIndex144));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex145 = (decoder.readIndex());
+        if (unionIndex145 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, null);
+        } else {
+            if (unionIndex145 == 1) {
+                Utf8 charSequence145;
+                Object oldString145 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(145);
+                if (oldString145 instanceof Utf8) {
+                    charSequence145 = (decoder).readString(((Utf8) oldString145));
+                } else {
+                    charSequence145 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, charSequence145);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F145': "+ unionIndex145));
+            }
+        }
+        int unionIndex146 = (decoder.readIndex());
+        if (unionIndex146 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, null);
+        } else {
+            if (unionIndex146 == 1) {
+                Utf8 charSequence146;
+                Object oldString146 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(146);
+                if (oldString146 instanceof Utf8) {
+                    charSequence146 = (decoder).readString(((Utf8) oldString146));
+                } else {
+                    charSequence146 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, charSequence146);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F146': "+ unionIndex146));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex147 = (decoder.readIndex());
+        if (unionIndex147 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, null);
+        } else {
+            if (unionIndex147 == 1) {
+                Utf8 charSequence147;
+                Object oldString147 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(147);
+                if (oldString147 instanceof Utf8) {
+                    charSequence147 = (decoder).readString(((Utf8) oldString147));
+                } else {
+                    charSequence147 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, charSequence147);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F147': "+ unionIndex147));
+            }
+        }
+        int unionIndex148 = (decoder.readIndex());
+        if (unionIndex148 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, null);
+        } else {
+            if (unionIndex148 == 1) {
+                Utf8 charSequence148;
+                Object oldString148 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(148);
+                if (oldString148 instanceof Utf8) {
+                    charSequence148 = (decoder).readString(((Utf8) oldString148));
+                } else {
+                    charSequence148 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, charSequence148);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F148': "+ unionIndex148));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex149 = (decoder.readIndex());
+        if (unionIndex149 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, null);
+        } else {
+            if (unionIndex149 == 1) {
+                Utf8 charSequence149;
+                Object oldString149 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(149);
+                if (oldString149 instanceof Utf8) {
+                    charSequence149 = (decoder).readString(((Utf8) oldString149));
+                } else {
+                    charSequence149 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, charSequence149);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F149': "+ unionIndex149));
+            }
+        }
+        int unionIndex150 = (decoder.readIndex());
+        if (unionIndex150 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, null);
+        } else {
+            if (unionIndex150 == 1) {
+                Utf8 charSequence150;
+                Object oldString150 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(150);
+                if (oldString150 instanceof Utf8) {
+                    charSequence150 = (decoder).readString(((Utf8) oldString150));
+                } else {
+                    charSequence150 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, charSequence150);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F150': "+ unionIndex150));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex151 = (decoder.readIndex());
+        if (unionIndex151 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, null);
+        } else {
+            if (unionIndex151 == 1) {
+                Utf8 charSequence151;
+                Object oldString151 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(151);
+                if (oldString151 instanceof Utf8) {
+                    charSequence151 = (decoder).readString(((Utf8) oldString151));
+                } else {
+                    charSequence151 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, charSequence151);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F151': "+ unionIndex151));
+            }
+        }
+        int unionIndex152 = (decoder.readIndex());
+        if (unionIndex152 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, null);
+        } else {
+            if (unionIndex152 == 1) {
+                Utf8 charSequence152;
+                Object oldString152 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(152);
+                if (oldString152 instanceof Utf8) {
+                    charSequence152 = (decoder).readString(((Utf8) oldString152));
+                } else {
+                    charSequence152 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, charSequence152);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F152': "+ unionIndex152));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex153 = (decoder.readIndex());
+        if (unionIndex153 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, null);
+        } else {
+            if (unionIndex153 == 1) {
+                Utf8 charSequence153;
+                Object oldString153 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(153);
+                if (oldString153 instanceof Utf8) {
+                    charSequence153 = (decoder).readString(((Utf8) oldString153));
+                } else {
+                    charSequence153 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, charSequence153);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F153': "+ unionIndex153));
+            }
+        }
+        int unionIndex154 = (decoder.readIndex());
+        if (unionIndex154 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, null);
+        } else {
+            if (unionIndex154 == 1) {
+                Utf8 charSequence154;
+                Object oldString154 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(154);
+                if (oldString154 instanceof Utf8) {
+                    charSequence154 = (decoder).readString(((Utf8) oldString154));
+                } else {
+                    charSequence154 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, charSequence154);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F154': "+ unionIndex154));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex155 = (decoder.readIndex());
+        if (unionIndex155 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, null);
+        } else {
+            if (unionIndex155 == 1) {
+                Utf8 charSequence155;
+                Object oldString155 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(155);
+                if (oldString155 instanceof Utf8) {
+                    charSequence155 = (decoder).readString(((Utf8) oldString155));
+                } else {
+                    charSequence155 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, charSequence155);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F155': "+ unionIndex155));
+            }
+        }
+        int unionIndex156 = (decoder.readIndex());
+        if (unionIndex156 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, null);
+        } else {
+            if (unionIndex156 == 1) {
+                Utf8 charSequence156;
+                Object oldString156 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(156);
+                if (oldString156 instanceof Utf8) {
+                    charSequence156 = (decoder).readString(((Utf8) oldString156));
+                } else {
+                    charSequence156 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, charSequence156);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F156': "+ unionIndex156));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex157 = (decoder.readIndex());
+        if (unionIndex157 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, null);
+        } else {
+            if (unionIndex157 == 1) {
+                Utf8 charSequence157;
+                Object oldString157 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(157);
+                if (oldString157 instanceof Utf8) {
+                    charSequence157 = (decoder).readString(((Utf8) oldString157));
+                } else {
+                    charSequence157 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, charSequence157);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F157': "+ unionIndex157));
+            }
+        }
+        int unionIndex158 = (decoder.readIndex());
+        if (unionIndex158 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, null);
+        } else {
+            if (unionIndex158 == 1) {
+                Utf8 charSequence158;
+                Object oldString158 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(158);
+                if (oldString158 instanceof Utf8) {
+                    charSequence158 = (decoder).readString(((Utf8) oldString158));
+                } else {
+                    charSequence158 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, charSequence158);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F158': "+ unionIndex158));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex159 = (decoder.readIndex());
+        if (unionIndex159 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, null);
+        } else {
+            if (unionIndex159 == 1) {
+                Utf8 charSequence159;
+                Object oldString159 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(159);
+                if (oldString159 instanceof Utf8) {
+                    charSequence159 = (decoder).readString(((Utf8) oldString159));
+                } else {
+                    charSequence159 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, charSequence159);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F159': "+ unionIndex159));
+            }
+        }
+        int unionIndex160 = (decoder.readIndex());
+        if (unionIndex160 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, null);
+        } else {
+            if (unionIndex160 == 1) {
+                Utf8 charSequence160;
+                Object oldString160 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(160);
+                if (oldString160 instanceof Utf8) {
+                    charSequence160 = (decoder).readString(((Utf8) oldString160));
+                } else {
+                    charSequence160 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, charSequence160);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F160': "+ unionIndex160));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex161 = (decoder.readIndex());
+        if (unionIndex161 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, null);
+        } else {
+            if (unionIndex161 == 1) {
+                Utf8 charSequence161;
+                Object oldString161 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(161);
+                if (oldString161 instanceof Utf8) {
+                    charSequence161 = (decoder).readString(((Utf8) oldString161));
+                } else {
+                    charSequence161 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, charSequence161);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F161': "+ unionIndex161));
+            }
+        }
+        int unionIndex162 = (decoder.readIndex());
+        if (unionIndex162 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, null);
+        } else {
+            if (unionIndex162 == 1) {
+                Utf8 charSequence162;
+                Object oldString162 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(162);
+                if (oldString162 instanceof Utf8) {
+                    charSequence162 = (decoder).readString(((Utf8) oldString162));
+                } else {
+                    charSequence162 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, charSequence162);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F162': "+ unionIndex162));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex163 = (decoder.readIndex());
+        if (unionIndex163 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, null);
+        } else {
+            if (unionIndex163 == 1) {
+                Utf8 charSequence163;
+                Object oldString163 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(163);
+                if (oldString163 instanceof Utf8) {
+                    charSequence163 = (decoder).readString(((Utf8) oldString163));
+                } else {
+                    charSequence163 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, charSequence163);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F163': "+ unionIndex163));
+            }
+        }
+        int unionIndex164 = (decoder.readIndex());
+        if (unionIndex164 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, null);
+        } else {
+            if (unionIndex164 == 1) {
+                Utf8 charSequence164;
+                Object oldString164 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(164);
+                if (oldString164 instanceof Utf8) {
+                    charSequence164 = (decoder).readString(((Utf8) oldString164));
+                } else {
+                    charSequence164 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, charSequence164);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F164': "+ unionIndex164));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex165 = (decoder.readIndex());
+        if (unionIndex165 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, null);
+        } else {
+            if (unionIndex165 == 1) {
+                Utf8 charSequence165;
+                Object oldString165 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(165);
+                if (oldString165 instanceof Utf8) {
+                    charSequence165 = (decoder).readString(((Utf8) oldString165));
+                } else {
+                    charSequence165 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, charSequence165);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F165': "+ unionIndex165));
+            }
+        }
+        int unionIndex166 = (decoder.readIndex());
+        if (unionIndex166 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, null);
+        } else {
+            if (unionIndex166 == 1) {
+                Utf8 charSequence166;
+                Object oldString166 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(166);
+                if (oldString166 instanceof Utf8) {
+                    charSequence166 = (decoder).readString(((Utf8) oldString166));
+                } else {
+                    charSequence166 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, charSequence166);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F166': "+ unionIndex166));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex167 = (decoder.readIndex());
+        if (unionIndex167 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, null);
+        } else {
+            if (unionIndex167 == 1) {
+                Utf8 charSequence167;
+                Object oldString167 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(167);
+                if (oldString167 instanceof Utf8) {
+                    charSequence167 = (decoder).readString(((Utf8) oldString167));
+                } else {
+                    charSequence167 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, charSequence167);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F167': "+ unionIndex167));
+            }
+        }
+        int unionIndex168 = (decoder.readIndex());
+        if (unionIndex168 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, null);
+        } else {
+            if (unionIndex168 == 1) {
+                Utf8 charSequence168;
+                Object oldString168 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(168);
+                if (oldString168 instanceof Utf8) {
+                    charSequence168 = (decoder).readString(((Utf8) oldString168));
+                } else {
+                    charSequence168 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, charSequence168);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F168': "+ unionIndex168));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex169 = (decoder.readIndex());
+        if (unionIndex169 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, null);
+        } else {
+            if (unionIndex169 == 1) {
+                Utf8 charSequence169;
+                Object oldString169 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(169);
+                if (oldString169 instanceof Utf8) {
+                    charSequence169 = (decoder).readString(((Utf8) oldString169));
+                } else {
+                    charSequence169 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, charSequence169);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F169': "+ unionIndex169));
+            }
+        }
+        int unionIndex170 = (decoder.readIndex());
+        if (unionIndex170 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, null);
+        } else {
+            if (unionIndex170 == 1) {
+                Utf8 charSequence170;
+                Object oldString170 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(170);
+                if (oldString170 instanceof Utf8) {
+                    charSequence170 = (decoder).readString(((Utf8) oldString170));
+                } else {
+                    charSequence170 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, charSequence170);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F170': "+ unionIndex170));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex171 = (decoder.readIndex());
+        if (unionIndex171 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, null);
+        } else {
+            if (unionIndex171 == 1) {
+                Utf8 charSequence171;
+                Object oldString171 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(171);
+                if (oldString171 instanceof Utf8) {
+                    charSequence171 = (decoder).readString(((Utf8) oldString171));
+                } else {
+                    charSequence171 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, charSequence171);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F171': "+ unionIndex171));
+            }
+        }
+        int unionIndex172 = (decoder.readIndex());
+        if (unionIndex172 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, null);
+        } else {
+            if (unionIndex172 == 1) {
+                Utf8 charSequence172;
+                Object oldString172 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(172);
+                if (oldString172 instanceof Utf8) {
+                    charSequence172 = (decoder).readString(((Utf8) oldString172));
+                } else {
+                    charSequence172 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, charSequence172);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F172': "+ unionIndex172));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex173 = (decoder.readIndex());
+        if (unionIndex173 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, null);
+        } else {
+            if (unionIndex173 == 1) {
+                Utf8 charSequence173;
+                Object oldString173 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(173);
+                if (oldString173 instanceof Utf8) {
+                    charSequence173 = (decoder).readString(((Utf8) oldString173));
+                } else {
+                    charSequence173 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, charSequence173);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F173': "+ unionIndex173));
+            }
+        }
+        int unionIndex174 = (decoder.readIndex());
+        if (unionIndex174 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, null);
+        } else {
+            if (unionIndex174 == 1) {
+                Utf8 charSequence174;
+                Object oldString174 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(174);
+                if (oldString174 instanceof Utf8) {
+                    charSequence174 = (decoder).readString(((Utf8) oldString174));
+                } else {
+                    charSequence174 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, charSequence174);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F174': "+ unionIndex174));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex175 = (decoder.readIndex());
+        if (unionIndex175 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, null);
+        } else {
+            if (unionIndex175 == 1) {
+                Utf8 charSequence175;
+                Object oldString175 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(175);
+                if (oldString175 instanceof Utf8) {
+                    charSequence175 = (decoder).readString(((Utf8) oldString175));
+                } else {
+                    charSequence175 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, charSequence175);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F175': "+ unionIndex175));
+            }
+        }
+        int unionIndex176 = (decoder.readIndex());
+        if (unionIndex176 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, null);
+        } else {
+            if (unionIndex176 == 1) {
+                Utf8 charSequence176;
+                Object oldString176 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(176);
+                if (oldString176 instanceof Utf8) {
+                    charSequence176 = (decoder).readString(((Utf8) oldString176));
+                } else {
+                    charSequence176 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, charSequence176);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F176': "+ unionIndex176));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex177 = (decoder.readIndex());
+        if (unionIndex177 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, null);
+        } else {
+            if (unionIndex177 == 1) {
+                Utf8 charSequence177;
+                Object oldString177 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(177);
+                if (oldString177 instanceof Utf8) {
+                    charSequence177 = (decoder).readString(((Utf8) oldString177));
+                } else {
+                    charSequence177 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, charSequence177);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F177': "+ unionIndex177));
+            }
+        }
+        int unionIndex178 = (decoder.readIndex());
+        if (unionIndex178 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, null);
+        } else {
+            if (unionIndex178 == 1) {
+                Utf8 charSequence178;
+                Object oldString178 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(178);
+                if (oldString178 instanceof Utf8) {
+                    charSequence178 = (decoder).readString(((Utf8) oldString178));
+                } else {
+                    charSequence178 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, charSequence178);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F178': "+ unionIndex178));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex179 = (decoder.readIndex());
+        if (unionIndex179 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, null);
+        } else {
+            if (unionIndex179 == 1) {
+                Utf8 charSequence179;
+                Object oldString179 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(179);
+                if (oldString179 instanceof Utf8) {
+                    charSequence179 = (decoder).readString(((Utf8) oldString179));
+                } else {
+                    charSequence179 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, charSequence179);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F179': "+ unionIndex179));
+            }
+        }
+        int unionIndex180 = (decoder.readIndex());
+        if (unionIndex180 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, null);
+        } else {
+            if (unionIndex180 == 1) {
+                Utf8 charSequence180;
+                Object oldString180 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(180);
+                if (oldString180 instanceof Utf8) {
+                    charSequence180 = (decoder).readString(((Utf8) oldString180));
+                } else {
+                    charSequence180 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, charSequence180);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F180': "+ unionIndex180));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex181 = (decoder.readIndex());
+        if (unionIndex181 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, null);
+        } else {
+            if (unionIndex181 == 1) {
+                Utf8 charSequence181;
+                Object oldString181 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(181);
+                if (oldString181 instanceof Utf8) {
+                    charSequence181 = (decoder).readString(((Utf8) oldString181));
+                } else {
+                    charSequence181 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, charSequence181);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F181': "+ unionIndex181));
+            }
+        }
+        int unionIndex182 = (decoder.readIndex());
+        if (unionIndex182 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, null);
+        } else {
+            if (unionIndex182 == 1) {
+                Utf8 charSequence182;
+                Object oldString182 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(182);
+                if (oldString182 instanceof Utf8) {
+                    charSequence182 = (decoder).readString(((Utf8) oldString182));
+                } else {
+                    charSequence182 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, charSequence182);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F182': "+ unionIndex182));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex183 = (decoder.readIndex());
+        if (unionIndex183 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, null);
+        } else {
+            if (unionIndex183 == 1) {
+                Utf8 charSequence183;
+                Object oldString183 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(183);
+                if (oldString183 instanceof Utf8) {
+                    charSequence183 = (decoder).readString(((Utf8) oldString183));
+                } else {
+                    charSequence183 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, charSequence183);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F183': "+ unionIndex183));
+            }
+        }
+        int unionIndex184 = (decoder.readIndex());
+        if (unionIndex184 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, null);
+        } else {
+            if (unionIndex184 == 1) {
+                Utf8 charSequence184;
+                Object oldString184 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(184);
+                if (oldString184 instanceof Utf8) {
+                    charSequence184 = (decoder).readString(((Utf8) oldString184));
+                } else {
+                    charSequence184 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, charSequence184);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F184': "+ unionIndex184));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex185 = (decoder.readIndex());
+        if (unionIndex185 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, null);
+        } else {
+            if (unionIndex185 == 1) {
+                Utf8 charSequence185;
+                Object oldString185 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(185);
+                if (oldString185 instanceof Utf8) {
+                    charSequence185 = (decoder).readString(((Utf8) oldString185));
+                } else {
+                    charSequence185 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, charSequence185);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F185': "+ unionIndex185));
+            }
+        }
+        int unionIndex186 = (decoder.readIndex());
+        if (unionIndex186 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, null);
+        } else {
+            if (unionIndex186 == 1) {
+                Utf8 charSequence186;
+                Object oldString186 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(186);
+                if (oldString186 instanceof Utf8) {
+                    charSequence186 = (decoder).readString(((Utf8) oldString186));
+                } else {
+                    charSequence186 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, charSequence186);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F186': "+ unionIndex186));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex187 = (decoder.readIndex());
+        if (unionIndex187 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, null);
+        } else {
+            if (unionIndex187 == 1) {
+                Utf8 charSequence187;
+                Object oldString187 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(187);
+                if (oldString187 instanceof Utf8) {
+                    charSequence187 = (decoder).readString(((Utf8) oldString187));
+                } else {
+                    charSequence187 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, charSequence187);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F187': "+ unionIndex187));
+            }
+        }
+        int unionIndex188 = (decoder.readIndex());
+        if (unionIndex188 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, null);
+        } else {
+            if (unionIndex188 == 1) {
+                Utf8 charSequence188;
+                Object oldString188 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(188);
+                if (oldString188 instanceof Utf8) {
+                    charSequence188 = (decoder).readString(((Utf8) oldString188));
+                } else {
+                    charSequence188 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, charSequence188);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F188': "+ unionIndex188));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex189 = (decoder.readIndex());
+        if (unionIndex189 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, null);
+        } else {
+            if (unionIndex189 == 1) {
+                Utf8 charSequence189;
+                Object oldString189 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(189);
+                if (oldString189 instanceof Utf8) {
+                    charSequence189 = (decoder).readString(((Utf8) oldString189));
+                } else {
+                    charSequence189 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, charSequence189);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F189': "+ unionIndex189));
+            }
+        }
+        int unionIndex190 = (decoder.readIndex());
+        if (unionIndex190 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, null);
+        } else {
+            if (unionIndex190 == 1) {
+                Utf8 charSequence190;
+                Object oldString190 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(190);
+                if (oldString190 instanceof Utf8) {
+                    charSequence190 = (decoder).readString(((Utf8) oldString190));
+                } else {
+                    charSequence190 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, charSequence190);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F190': "+ unionIndex190));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex191 = (decoder.readIndex());
+        if (unionIndex191 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, null);
+        } else {
+            if (unionIndex191 == 1) {
+                Utf8 charSequence191;
+                Object oldString191 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(191);
+                if (oldString191 instanceof Utf8) {
+                    charSequence191 = (decoder).readString(((Utf8) oldString191));
+                } else {
+                    charSequence191 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, charSequence191);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F191': "+ unionIndex191));
+            }
+        }
+        int unionIndex192 = (decoder.readIndex());
+        if (unionIndex192 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, null);
+        } else {
+            if (unionIndex192 == 1) {
+                Utf8 charSequence192;
+                Object oldString192 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(192);
+                if (oldString192 instanceof Utf8) {
+                    charSequence192 = (decoder).readString(((Utf8) oldString192));
+                } else {
+                    charSequence192 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, charSequence192);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F192': "+ unionIndex192));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex193 = (decoder.readIndex());
+        if (unionIndex193 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, null);
+        } else {
+            if (unionIndex193 == 1) {
+                Utf8 charSequence193;
+                Object oldString193 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(193);
+                if (oldString193 instanceof Utf8) {
+                    charSequence193 = (decoder).readString(((Utf8) oldString193));
+                } else {
+                    charSequence193 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, charSequence193);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F193': "+ unionIndex193));
+            }
+        }
+        int unionIndex194 = (decoder.readIndex());
+        if (unionIndex194 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, null);
+        } else {
+            if (unionIndex194 == 1) {
+                Utf8 charSequence194;
+                Object oldString194 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(194);
+                if (oldString194 instanceof Utf8) {
+                    charSequence194 = (decoder).readString(((Utf8) oldString194));
+                } else {
+                    charSequence194 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, charSequence194);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F194': "+ unionIndex194));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex195 = (decoder.readIndex());
+        if (unionIndex195 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, null);
+        } else {
+            if (unionIndex195 == 1) {
+                Utf8 charSequence195;
+                Object oldString195 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(195);
+                if (oldString195 instanceof Utf8) {
+                    charSequence195 = (decoder).readString(((Utf8) oldString195));
+                } else {
+                    charSequence195 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, charSequence195);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F195': "+ unionIndex195));
+            }
+        }
+        int unionIndex196 = (decoder.readIndex());
+        if (unionIndex196 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, null);
+        } else {
+            if (unionIndex196 == 1) {
+                Utf8 charSequence196;
+                Object oldString196 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(196);
+                if (oldString196 instanceof Utf8) {
+                    charSequence196 = (decoder).readString(((Utf8) oldString196));
+                } else {
+                    charSequence196 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, charSequence196);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F196': "+ unionIndex196));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex197 = (decoder.readIndex());
+        if (unionIndex197 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, null);
+        } else {
+            if (unionIndex197 == 1) {
+                Utf8 charSequence197;
+                Object oldString197 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(197);
+                if (oldString197 instanceof Utf8) {
+                    charSequence197 = (decoder).readString(((Utf8) oldString197));
+                } else {
+                    charSequence197 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, charSequence197);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F197': "+ unionIndex197));
+            }
+        }
+        int unionIndex198 = (decoder.readIndex());
+        if (unionIndex198 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, null);
+        } else {
+            if (unionIndex198 == 1) {
+                Utf8 charSequence198;
+                Object oldString198 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(198);
+                if (oldString198 instanceof Utf8) {
+                    charSequence198 = (decoder).readString(((Utf8) oldString198));
+                } else {
+                    charSequence198 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, charSequence198);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F198': "+ unionIndex198));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex199 = (decoder.readIndex());
+        if (unionIndex199 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, null);
+        } else {
+            if (unionIndex199 == 1) {
+                Utf8 charSequence199;
+                Object oldString199 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(199);
+                if (oldString199 instanceof Utf8) {
+                    charSequence199 = (decoder).readString(((Utf8) oldString199));
+                } else {
+                    charSequence199 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, charSequence199);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F199': "+ unionIndex199));
+            }
+        }
+        int unionIndex200 = (decoder.readIndex());
+        if (unionIndex200 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, null);
+        } else {
+            if (unionIndex200 == 1) {
+                Utf8 charSequence200;
+                Object oldString200 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(200);
+                if (oldString200 instanceof Utf8) {
+                    charSequence200 = (decoder).readString(((Utf8) oldString200));
+                } else {
+                    charSequence200 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, charSequence200);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F200': "+ unionIndex200));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex201 = (decoder.readIndex());
+        if (unionIndex201 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, null);
+        } else {
+            if (unionIndex201 == 1) {
+                Utf8 charSequence201;
+                Object oldString201 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(201);
+                if (oldString201 instanceof Utf8) {
+                    charSequence201 = (decoder).readString(((Utf8) oldString201));
+                } else {
+                    charSequence201 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, charSequence201);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F201': "+ unionIndex201));
+            }
+        }
+        int unionIndex202 = (decoder.readIndex());
+        if (unionIndex202 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, null);
+        } else {
+            if (unionIndex202 == 1) {
+                Utf8 charSequence202;
+                Object oldString202 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(202);
+                if (oldString202 instanceof Utf8) {
+                    charSequence202 = (decoder).readString(((Utf8) oldString202));
+                } else {
+                    charSequence202 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, charSequence202);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F202': "+ unionIndex202));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex203 = (decoder.readIndex());
+        if (unionIndex203 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, null);
+        } else {
+            if (unionIndex203 == 1) {
+                Utf8 charSequence203;
+                Object oldString203 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(203);
+                if (oldString203 instanceof Utf8) {
+                    charSequence203 = (decoder).readString(((Utf8) oldString203));
+                } else {
+                    charSequence203 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, charSequence203);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F203': "+ unionIndex203));
+            }
+        }
+        int unionIndex204 = (decoder.readIndex());
+        if (unionIndex204 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, null);
+        } else {
+            if (unionIndex204 == 1) {
+                Utf8 charSequence204;
+                Object oldString204 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(204);
+                if (oldString204 instanceof Utf8) {
+                    charSequence204 = (decoder).readString(((Utf8) oldString204));
+                } else {
+                    charSequence204 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, charSequence204);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F204': "+ unionIndex204));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex205 = (decoder.readIndex());
+        if (unionIndex205 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, null);
+        } else {
+            if (unionIndex205 == 1) {
+                Utf8 charSequence205;
+                Object oldString205 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(205);
+                if (oldString205 instanceof Utf8) {
+                    charSequence205 = (decoder).readString(((Utf8) oldString205));
+                } else {
+                    charSequence205 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, charSequence205);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F205': "+ unionIndex205));
+            }
+        }
+        int unionIndex206 = (decoder.readIndex());
+        if (unionIndex206 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, null);
+        } else {
+            if (unionIndex206 == 1) {
+                Utf8 charSequence206;
+                Object oldString206 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(206);
+                if (oldString206 instanceof Utf8) {
+                    charSequence206 = (decoder).readString(((Utf8) oldString206));
+                } else {
+                    charSequence206 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, charSequence206);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F206': "+ unionIndex206));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex207 = (decoder.readIndex());
+        if (unionIndex207 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, null);
+        } else {
+            if (unionIndex207 == 1) {
+                Utf8 charSequence207;
+                Object oldString207 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(207);
+                if (oldString207 instanceof Utf8) {
+                    charSequence207 = (decoder).readString(((Utf8) oldString207));
+                } else {
+                    charSequence207 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, charSequence207);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F207': "+ unionIndex207));
+            }
+        }
+        int unionIndex208 = (decoder.readIndex());
+        if (unionIndex208 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, null);
+        } else {
+            if (unionIndex208 == 1) {
+                Utf8 charSequence208;
+                Object oldString208 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(208);
+                if (oldString208 instanceof Utf8) {
+                    charSequence208 = (decoder).readString(((Utf8) oldString208));
+                } else {
+                    charSequence208 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, charSequence208);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F208': "+ unionIndex208));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex209 = (decoder.readIndex());
+        if (unionIndex209 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, null);
+        } else {
+            if (unionIndex209 == 1) {
+                Utf8 charSequence209;
+                Object oldString209 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(209);
+                if (oldString209 instanceof Utf8) {
+                    charSequence209 = (decoder).readString(((Utf8) oldString209));
+                } else {
+                    charSequence209 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, charSequence209);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F209': "+ unionIndex209));
+            }
+        }
+        int unionIndex210 = (decoder.readIndex());
+        if (unionIndex210 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, null);
+        } else {
+            if (unionIndex210 == 1) {
+                Utf8 charSequence210;
+                Object oldString210 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(210);
+                if (oldString210 instanceof Utf8) {
+                    charSequence210 = (decoder).readString(((Utf8) oldString210));
+                } else {
+                    charSequence210 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, charSequence210);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F210': "+ unionIndex210));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex211 = (decoder.readIndex());
+        if (unionIndex211 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, null);
+        } else {
+            if (unionIndex211 == 1) {
+                Utf8 charSequence211;
+                Object oldString211 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(211);
+                if (oldString211 instanceof Utf8) {
+                    charSequence211 = (decoder).readString(((Utf8) oldString211));
+                } else {
+                    charSequence211 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, charSequence211);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F211': "+ unionIndex211));
+            }
+        }
+        int unionIndex212 = (decoder.readIndex());
+        if (unionIndex212 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, null);
+        } else {
+            if (unionIndex212 == 1) {
+                Utf8 charSequence212;
+                Object oldString212 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(212);
+                if (oldString212 instanceof Utf8) {
+                    charSequence212 = (decoder).readString(((Utf8) oldString212));
+                } else {
+                    charSequence212 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, charSequence212);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F212': "+ unionIndex212));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex213 = (decoder.readIndex());
+        if (unionIndex213 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, null);
+        } else {
+            if (unionIndex213 == 1) {
+                Utf8 charSequence213;
+                Object oldString213 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(213);
+                if (oldString213 instanceof Utf8) {
+                    charSequence213 = (decoder).readString(((Utf8) oldString213));
+                } else {
+                    charSequence213 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, charSequence213);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F213': "+ unionIndex213));
+            }
+        }
+        int unionIndex214 = (decoder.readIndex());
+        if (unionIndex214 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, null);
+        } else {
+            if (unionIndex214 == 1) {
+                Utf8 charSequence214;
+                Object oldString214 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(214);
+                if (oldString214 instanceof Utf8) {
+                    charSequence214 = (decoder).readString(((Utf8) oldString214));
+                } else {
+                    charSequence214 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, charSequence214);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F214': "+ unionIndex214));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex215 = (decoder.readIndex());
+        if (unionIndex215 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, null);
+        } else {
+            if (unionIndex215 == 1) {
+                Utf8 charSequence215;
+                Object oldString215 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(215);
+                if (oldString215 instanceof Utf8) {
+                    charSequence215 = (decoder).readString(((Utf8) oldString215));
+                } else {
+                    charSequence215 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, charSequence215);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F215': "+ unionIndex215));
+            }
+        }
+        int unionIndex216 = (decoder.readIndex());
+        if (unionIndex216 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, null);
+        } else {
+            if (unionIndex216 == 1) {
+                Utf8 charSequence216;
+                Object oldString216 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(216);
+                if (oldString216 instanceof Utf8) {
+                    charSequence216 = (decoder).readString(((Utf8) oldString216));
+                } else {
+                    charSequence216 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, charSequence216);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F216': "+ unionIndex216));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex217 = (decoder.readIndex());
+        if (unionIndex217 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, null);
+        } else {
+            if (unionIndex217 == 1) {
+                Utf8 charSequence217;
+                Object oldString217 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(217);
+                if (oldString217 instanceof Utf8) {
+                    charSequence217 = (decoder).readString(((Utf8) oldString217));
+                } else {
+                    charSequence217 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, charSequence217);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F217': "+ unionIndex217));
+            }
+        }
+        int unionIndex218 = (decoder.readIndex());
+        if (unionIndex218 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, null);
+        } else {
+            if (unionIndex218 == 1) {
+                Utf8 charSequence218;
+                Object oldString218 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(218);
+                if (oldString218 instanceof Utf8) {
+                    charSequence218 = (decoder).readString(((Utf8) oldString218));
+                } else {
+                    charSequence218 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, charSequence218);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F218': "+ unionIndex218));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex219 = (decoder.readIndex());
+        if (unionIndex219 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, null);
+        } else {
+            if (unionIndex219 == 1) {
+                Utf8 charSequence219;
+                Object oldString219 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(219);
+                if (oldString219 instanceof Utf8) {
+                    charSequence219 = (decoder).readString(((Utf8) oldString219));
+                } else {
+                    charSequence219 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, charSequence219);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F219': "+ unionIndex219));
+            }
+        }
+        int unionIndex220 = (decoder.readIndex());
+        if (unionIndex220 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, null);
+        } else {
+            if (unionIndex220 == 1) {
+                Utf8 charSequence220;
+                Object oldString220 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(220);
+                if (oldString220 instanceof Utf8) {
+                    charSequence220 = (decoder).readString(((Utf8) oldString220));
+                } else {
+                    charSequence220 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, charSequence220);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F220': "+ unionIndex220));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex221 = (decoder.readIndex());
+        if (unionIndex221 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, null);
+        } else {
+            if (unionIndex221 == 1) {
+                Utf8 charSequence221;
+                Object oldString221 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(221);
+                if (oldString221 instanceof Utf8) {
+                    charSequence221 = (decoder).readString(((Utf8) oldString221));
+                } else {
+                    charSequence221 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, charSequence221);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F221': "+ unionIndex221));
+            }
+        }
+        int unionIndex222 = (decoder.readIndex());
+        if (unionIndex222 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, null);
+        } else {
+            if (unionIndex222 == 1) {
+                Utf8 charSequence222;
+                Object oldString222 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(222);
+                if (oldString222 instanceof Utf8) {
+                    charSequence222 = (decoder).readString(((Utf8) oldString222));
+                } else {
+                    charSequence222 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, charSequence222);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F222': "+ unionIndex222));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex223 = (decoder.readIndex());
+        if (unionIndex223 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, null);
+        } else {
+            if (unionIndex223 == 1) {
+                Utf8 charSequence223;
+                Object oldString223 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(223);
+                if (oldString223 instanceof Utf8) {
+                    charSequence223 = (decoder).readString(((Utf8) oldString223));
+                } else {
+                    charSequence223 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, charSequence223);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F223': "+ unionIndex223));
+            }
+        }
+        int unionIndex224 = (decoder.readIndex());
+        if (unionIndex224 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, null);
+        } else {
+            if (unionIndex224 == 1) {
+                Utf8 charSequence224;
+                Object oldString224 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(224);
+                if (oldString224 instanceof Utf8) {
+                    charSequence224 = (decoder).readString(((Utf8) oldString224));
+                } else {
+                    charSequence224 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, charSequence224);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F224': "+ unionIndex224));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex225 = (decoder.readIndex());
+        if (unionIndex225 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, null);
+        } else {
+            if (unionIndex225 == 1) {
+                Utf8 charSequence225;
+                Object oldString225 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(225);
+                if (oldString225 instanceof Utf8) {
+                    charSequence225 = (decoder).readString(((Utf8) oldString225));
+                } else {
+                    charSequence225 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, charSequence225);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F225': "+ unionIndex225));
+            }
+        }
+        int unionIndex226 = (decoder.readIndex());
+        if (unionIndex226 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, null);
+        } else {
+            if (unionIndex226 == 1) {
+                Utf8 charSequence226;
+                Object oldString226 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(226);
+                if (oldString226 instanceof Utf8) {
+                    charSequence226 = (decoder).readString(((Utf8) oldString226));
+                } else {
+                    charSequence226 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, charSequence226);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F226': "+ unionIndex226));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex227 = (decoder.readIndex());
+        if (unionIndex227 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, null);
+        } else {
+            if (unionIndex227 == 1) {
+                Utf8 charSequence227;
+                Object oldString227 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(227);
+                if (oldString227 instanceof Utf8) {
+                    charSequence227 = (decoder).readString(((Utf8) oldString227));
+                } else {
+                    charSequence227 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, charSequence227);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F227': "+ unionIndex227));
+            }
+        }
+        int unionIndex228 = (decoder.readIndex());
+        if (unionIndex228 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, null);
+        } else {
+            if (unionIndex228 == 1) {
+                Utf8 charSequence228;
+                Object oldString228 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(228);
+                if (oldString228 instanceof Utf8) {
+                    charSequence228 = (decoder).readString(((Utf8) oldString228));
+                } else {
+                    charSequence228 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, charSequence228);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F228': "+ unionIndex228));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex229 = (decoder.readIndex());
+        if (unionIndex229 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, null);
+        } else {
+            if (unionIndex229 == 1) {
+                Utf8 charSequence229;
+                Object oldString229 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(229);
+                if (oldString229 instanceof Utf8) {
+                    charSequence229 = (decoder).readString(((Utf8) oldString229));
+                } else {
+                    charSequence229 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, charSequence229);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F229': "+ unionIndex229));
+            }
+        }
+        int unionIndex230 = (decoder.readIndex());
+        if (unionIndex230 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, null);
+        } else {
+            if (unionIndex230 == 1) {
+                Utf8 charSequence230;
+                Object oldString230 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(230);
+                if (oldString230 instanceof Utf8) {
+                    charSequence230 = (decoder).readString(((Utf8) oldString230));
+                } else {
+                    charSequence230 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, charSequence230);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F230': "+ unionIndex230));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex231 = (decoder.readIndex());
+        if (unionIndex231 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, null);
+        } else {
+            if (unionIndex231 == 1) {
+                Utf8 charSequence231;
+                Object oldString231 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(231);
+                if (oldString231 instanceof Utf8) {
+                    charSequence231 = (decoder).readString(((Utf8) oldString231));
+                } else {
+                    charSequence231 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, charSequence231);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F231': "+ unionIndex231));
+            }
+        }
+        int unionIndex232 = (decoder.readIndex());
+        if (unionIndex232 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, null);
+        } else {
+            if (unionIndex232 == 1) {
+                Utf8 charSequence232;
+                Object oldString232 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(232);
+                if (oldString232 instanceof Utf8) {
+                    charSequence232 = (decoder).readString(((Utf8) oldString232));
+                } else {
+                    charSequence232 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, charSequence232);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F232': "+ unionIndex232));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex233 = (decoder.readIndex());
+        if (unionIndex233 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, null);
+        } else {
+            if (unionIndex233 == 1) {
+                Utf8 charSequence233;
+                Object oldString233 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(233);
+                if (oldString233 instanceof Utf8) {
+                    charSequence233 = (decoder).readString(((Utf8) oldString233));
+                } else {
+                    charSequence233 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, charSequence233);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F233': "+ unionIndex233));
+            }
+        }
+        int unionIndex234 = (decoder.readIndex());
+        if (unionIndex234 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, null);
+        } else {
+            if (unionIndex234 == 1) {
+                Utf8 charSequence234;
+                Object oldString234 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(234);
+                if (oldString234 instanceof Utf8) {
+                    charSequence234 = (decoder).readString(((Utf8) oldString234));
+                } else {
+                    charSequence234 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, charSequence234);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F234': "+ unionIndex234));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex235 = (decoder.readIndex());
+        if (unionIndex235 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, null);
+        } else {
+            if (unionIndex235 == 1) {
+                Utf8 charSequence235;
+                Object oldString235 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(235);
+                if (oldString235 instanceof Utf8) {
+                    charSequence235 = (decoder).readString(((Utf8) oldString235));
+                } else {
+                    charSequence235 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, charSequence235);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F235': "+ unionIndex235));
+            }
+        }
+        int unionIndex236 = (decoder.readIndex());
+        if (unionIndex236 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, null);
+        } else {
+            if (unionIndex236 == 1) {
+                Utf8 charSequence236;
+                Object oldString236 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(236);
+                if (oldString236 instanceof Utf8) {
+                    charSequence236 = (decoder).readString(((Utf8) oldString236));
+                } else {
+                    charSequence236 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, charSequence236);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F236': "+ unionIndex236));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex237 = (decoder.readIndex());
+        if (unionIndex237 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, null);
+        } else {
+            if (unionIndex237 == 1) {
+                Utf8 charSequence237;
+                Object oldString237 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(237);
+                if (oldString237 instanceof Utf8) {
+                    charSequence237 = (decoder).readString(((Utf8) oldString237));
+                } else {
+                    charSequence237 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, charSequence237);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F237': "+ unionIndex237));
+            }
+        }
+        int unionIndex238 = (decoder.readIndex());
+        if (unionIndex238 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, null);
+        } else {
+            if (unionIndex238 == 1) {
+                Utf8 charSequence238;
+                Object oldString238 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(238);
+                if (oldString238 instanceof Utf8) {
+                    charSequence238 = (decoder).readString(((Utf8) oldString238));
+                } else {
+                    charSequence238 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, charSequence238);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F238': "+ unionIndex238));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex239 = (decoder.readIndex());
+        if (unionIndex239 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, null);
+        } else {
+            if (unionIndex239 == 1) {
+                Utf8 charSequence239;
+                Object oldString239 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(239);
+                if (oldString239 instanceof Utf8) {
+                    charSequence239 = (decoder).readString(((Utf8) oldString239));
+                } else {
+                    charSequence239 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, charSequence239);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F239': "+ unionIndex239));
+            }
+        }
+        int unionIndex240 = (decoder.readIndex());
+        if (unionIndex240 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, null);
+        } else {
+            if (unionIndex240 == 1) {
+                Utf8 charSequence240;
+                Object oldString240 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(240);
+                if (oldString240 instanceof Utf8) {
+                    charSequence240 = (decoder).readString(((Utf8) oldString240));
+                } else {
+                    charSequence240 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, charSequence240);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F240': "+ unionIndex240));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex241 = (decoder.readIndex());
+        if (unionIndex241 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, null);
+        } else {
+            if (unionIndex241 == 1) {
+                Utf8 charSequence241;
+                Object oldString241 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(241);
+                if (oldString241 instanceof Utf8) {
+                    charSequence241 = (decoder).readString(((Utf8) oldString241));
+                } else {
+                    charSequence241 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, charSequence241);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F241': "+ unionIndex241));
+            }
+        }
+        int unionIndex242 = (decoder.readIndex());
+        if (unionIndex242 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, null);
+        } else {
+            if (unionIndex242 == 1) {
+                Utf8 charSequence242;
+                Object oldString242 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(242);
+                if (oldString242 instanceof Utf8) {
+                    charSequence242 = (decoder).readString(((Utf8) oldString242));
+                } else {
+                    charSequence242 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, charSequence242);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F242': "+ unionIndex242));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex243 = (decoder.readIndex());
+        if (unionIndex243 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, null);
+        } else {
+            if (unionIndex243 == 1) {
+                Utf8 charSequence243;
+                Object oldString243 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(243);
+                if (oldString243 instanceof Utf8) {
+                    charSequence243 = (decoder).readString(((Utf8) oldString243));
+                } else {
+                    charSequence243 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, charSequence243);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F243': "+ unionIndex243));
+            }
+        }
+        int unionIndex244 = (decoder.readIndex());
+        if (unionIndex244 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, null);
+        } else {
+            if (unionIndex244 == 1) {
+                Utf8 charSequence244;
+                Object oldString244 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(244);
+                if (oldString244 instanceof Utf8) {
+                    charSequence244 = (decoder).readString(((Utf8) oldString244));
+                } else {
+                    charSequence244 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, charSequence244);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F244': "+ unionIndex244));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex245 = (decoder.readIndex());
+        if (unionIndex245 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, null);
+        } else {
+            if (unionIndex245 == 1) {
+                Utf8 charSequence245;
+                Object oldString245 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(245);
+                if (oldString245 instanceof Utf8) {
+                    charSequence245 = (decoder).readString(((Utf8) oldString245));
+                } else {
+                    charSequence245 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, charSequence245);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F245': "+ unionIndex245));
+            }
+        }
+        int unionIndex246 = (decoder.readIndex());
+        if (unionIndex246 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, null);
+        } else {
+            if (unionIndex246 == 1) {
+                Utf8 charSequence246;
+                Object oldString246 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(246);
+                if (oldString246 instanceof Utf8) {
+                    charSequence246 = (decoder).readString(((Utf8) oldString246));
+                } else {
+                    charSequence246 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, charSequence246);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F246': "+ unionIndex246));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex247 = (decoder.readIndex());
+        if (unionIndex247 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, null);
+        } else {
+            if (unionIndex247 == 1) {
+                Utf8 charSequence247;
+                Object oldString247 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(247);
+                if (oldString247 instanceof Utf8) {
+                    charSequence247 = (decoder).readString(((Utf8) oldString247));
+                } else {
+                    charSequence247 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, charSequence247);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F247': "+ unionIndex247));
+            }
+        }
+        int unionIndex248 = (decoder.readIndex());
+        if (unionIndex248 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, null);
+        } else {
+            if (unionIndex248 == 1) {
+                Utf8 charSequence248;
+                Object oldString248 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(248);
+                if (oldString248 instanceof Utf8) {
+                    charSequence248 = (decoder).readString(((Utf8) oldString248));
+                } else {
+                    charSequence248 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, charSequence248);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F248': "+ unionIndex248));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex249 = (decoder.readIndex());
+        if (unionIndex249 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, null);
+        } else {
+            if (unionIndex249 == 1) {
+                Utf8 charSequence249;
+                Object oldString249 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(249);
+                if (oldString249 instanceof Utf8) {
+                    charSequence249 = (decoder).readString(((Utf8) oldString249));
+                } else {
+                    charSequence249 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, charSequence249);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F249': "+ unionIndex249));
+            }
+        }
+        int unionIndex250 = (decoder.readIndex());
+        if (unionIndex250 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, null);
+        } else {
+            if (unionIndex250 == 1) {
+                Utf8 charSequence250;
+                Object oldString250 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(250);
+                if (oldString250 instanceof Utf8) {
+                    charSequence250 = (decoder).readString(((Utf8) oldString250));
+                } else {
+                    charSequence250 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, charSequence250);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F250': "+ unionIndex250));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex251 = (decoder.readIndex());
+        if (unionIndex251 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, null);
+        } else {
+            if (unionIndex251 == 1) {
+                Utf8 charSequence251;
+                Object oldString251 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(251);
+                if (oldString251 instanceof Utf8) {
+                    charSequence251 = (decoder).readString(((Utf8) oldString251));
+                } else {
+                    charSequence251 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, charSequence251);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F251': "+ unionIndex251));
+            }
+        }
+        int unionIndex252 = (decoder.readIndex());
+        if (unionIndex252 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, null);
+        } else {
+            if (unionIndex252 == 1) {
+                Utf8 charSequence252;
+                Object oldString252 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(252);
+                if (oldString252 instanceof Utf8) {
+                    charSequence252 = (decoder).readString(((Utf8) oldString252));
+                } else {
+                    charSequence252 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, charSequence252);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F252': "+ unionIndex252));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex253 = (decoder.readIndex());
+        if (unionIndex253 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, null);
+        } else {
+            if (unionIndex253 == 1) {
+                Utf8 charSequence253;
+                Object oldString253 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(253);
+                if (oldString253 instanceof Utf8) {
+                    charSequence253 = (decoder).readString(((Utf8) oldString253));
+                } else {
+                    charSequence253 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, charSequence253);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F253': "+ unionIndex253));
+            }
+        }
+        int unionIndex254 = (decoder.readIndex());
+        if (unionIndex254 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, null);
+        } else {
+            if (unionIndex254 == 1) {
+                Utf8 charSequence254;
+                Object oldString254 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(254);
+                if (oldString254 instanceof Utf8) {
+                    charSequence254 = (decoder).readString(((Utf8) oldString254));
+                } else {
+                    charSequence254 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, charSequence254);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F254': "+ unionIndex254));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex255 = (decoder.readIndex());
+        if (unionIndex255 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, null);
+        } else {
+            if (unionIndex255 == 1) {
+                Utf8 charSequence255;
+                Object oldString255 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(255);
+                if (oldString255 instanceof Utf8) {
+                    charSequence255 = (decoder).readString(((Utf8) oldString255));
+                } else {
+                    charSequence255 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, charSequence255);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F255': "+ unionIndex255));
+            }
+        }
+        int unionIndex256 = (decoder.readIndex());
+        if (unionIndex256 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, null);
+        } else {
+            if (unionIndex256 == 1) {
+                Utf8 charSequence256;
+                Object oldString256 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(256);
+                if (oldString256 instanceof Utf8) {
+                    charSequence256 = (decoder).readString(((Utf8) oldString256));
+                } else {
+                    charSequence256 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, charSequence256);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F256': "+ unionIndex256));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex257 = (decoder.readIndex());
+        if (unionIndex257 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, null);
+        } else {
+            if (unionIndex257 == 1) {
+                Utf8 charSequence257;
+                Object oldString257 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(257);
+                if (oldString257 instanceof Utf8) {
+                    charSequence257 = (decoder).readString(((Utf8) oldString257));
+                } else {
+                    charSequence257 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, charSequence257);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F257': "+ unionIndex257));
+            }
+        }
+        int unionIndex258 = (decoder.readIndex());
+        if (unionIndex258 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, null);
+        } else {
+            if (unionIndex258 == 1) {
+                Utf8 charSequence258;
+                Object oldString258 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(258);
+                if (oldString258 instanceof Utf8) {
+                    charSequence258 = (decoder).readString(((Utf8) oldString258));
+                } else {
+                    charSequence258 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, charSequence258);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F258': "+ unionIndex258));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex259 = (decoder.readIndex());
+        if (unionIndex259 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, null);
+        } else {
+            if (unionIndex259 == 1) {
+                Utf8 charSequence259;
+                Object oldString259 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(259);
+                if (oldString259 instanceof Utf8) {
+                    charSequence259 = (decoder).readString(((Utf8) oldString259));
+                } else {
+                    charSequence259 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, charSequence259);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F259': "+ unionIndex259));
+            }
+        }
+        int unionIndex260 = (decoder.readIndex());
+        if (unionIndex260 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, null);
+        } else {
+            if (unionIndex260 == 1) {
+                Utf8 charSequence260;
+                Object oldString260 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(260);
+                if (oldString260 instanceof Utf8) {
+                    charSequence260 = (decoder).readString(((Utf8) oldString260));
+                } else {
+                    charSequence260 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, charSequence260);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F260': "+ unionIndex260));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex261 = (decoder.readIndex());
+        if (unionIndex261 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, null);
+        } else {
+            if (unionIndex261 == 1) {
+                Utf8 charSequence261;
+                Object oldString261 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(261);
+                if (oldString261 instanceof Utf8) {
+                    charSequence261 = (decoder).readString(((Utf8) oldString261));
+                } else {
+                    charSequence261 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, charSequence261);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F261': "+ unionIndex261));
+            }
+        }
+        int unionIndex262 = (decoder.readIndex());
+        if (unionIndex262 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, null);
+        } else {
+            if (unionIndex262 == 1) {
+                Utf8 charSequence262;
+                Object oldString262 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(262);
+                if (oldString262 instanceof Utf8) {
+                    charSequence262 = (decoder).readString(((Utf8) oldString262));
+                } else {
+                    charSequence262 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, charSequence262);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F262': "+ unionIndex262));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex263 = (decoder.readIndex());
+        if (unionIndex263 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, null);
+        } else {
+            if (unionIndex263 == 1) {
+                Utf8 charSequence263;
+                Object oldString263 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(263);
+                if (oldString263 instanceof Utf8) {
+                    charSequence263 = (decoder).readString(((Utf8) oldString263));
+                } else {
+                    charSequence263 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, charSequence263);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F263': "+ unionIndex263));
+            }
+        }
+        int unionIndex264 = (decoder.readIndex());
+        if (unionIndex264 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, null);
+        } else {
+            if (unionIndex264 == 1) {
+                Utf8 charSequence264;
+                Object oldString264 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(264);
+                if (oldString264 instanceof Utf8) {
+                    charSequence264 = (decoder).readString(((Utf8) oldString264));
+                } else {
+                    charSequence264 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, charSequence264);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F264': "+ unionIndex264));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex265 = (decoder.readIndex());
+        if (unionIndex265 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, null);
+        } else {
+            if (unionIndex265 == 1) {
+                Utf8 charSequence265;
+                Object oldString265 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(265);
+                if (oldString265 instanceof Utf8) {
+                    charSequence265 = (decoder).readString(((Utf8) oldString265));
+                } else {
+                    charSequence265 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, charSequence265);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F265': "+ unionIndex265));
+            }
+        }
+        int unionIndex266 = (decoder.readIndex());
+        if (unionIndex266 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, null);
+        } else {
+            if (unionIndex266 == 1) {
+                Utf8 charSequence266;
+                Object oldString266 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(266);
+                if (oldString266 instanceof Utf8) {
+                    charSequence266 = (decoder).readString(((Utf8) oldString266));
+                } else {
+                    charSequence266 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, charSequence266);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F266': "+ unionIndex266));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex267 = (decoder.readIndex());
+        if (unionIndex267 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, null);
+        } else {
+            if (unionIndex267 == 1) {
+                Utf8 charSequence267;
+                Object oldString267 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(267);
+                if (oldString267 instanceof Utf8) {
+                    charSequence267 = (decoder).readString(((Utf8) oldString267));
+                } else {
+                    charSequence267 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, charSequence267);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F267': "+ unionIndex267));
+            }
+        }
+        int unionIndex268 = (decoder.readIndex());
+        if (unionIndex268 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, null);
+        } else {
+            if (unionIndex268 == 1) {
+                Utf8 charSequence268;
+                Object oldString268 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(268);
+                if (oldString268 instanceof Utf8) {
+                    charSequence268 = (decoder).readString(((Utf8) oldString268));
+                } else {
+                    charSequence268 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, charSequence268);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F268': "+ unionIndex268));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex269 = (decoder.readIndex());
+        if (unionIndex269 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, null);
+        } else {
+            if (unionIndex269 == 1) {
+                Utf8 charSequence269;
+                Object oldString269 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(269);
+                if (oldString269 instanceof Utf8) {
+                    charSequence269 = (decoder).readString(((Utf8) oldString269));
+                } else {
+                    charSequence269 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, charSequence269);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F269': "+ unionIndex269));
+            }
+        }
+        int unionIndex270 = (decoder.readIndex());
+        if (unionIndex270 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, null);
+        } else {
+            if (unionIndex270 == 1) {
+                Utf8 charSequence270;
+                Object oldString270 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(270);
+                if (oldString270 instanceof Utf8) {
+                    charSequence270 = (decoder).readString(((Utf8) oldString270));
+                } else {
+                    charSequence270 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, charSequence270);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F270': "+ unionIndex270));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex271 = (decoder.readIndex());
+        if (unionIndex271 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, null);
+        } else {
+            if (unionIndex271 == 1) {
+                Utf8 charSequence271;
+                Object oldString271 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(271);
+                if (oldString271 instanceof Utf8) {
+                    charSequence271 = (decoder).readString(((Utf8) oldString271));
+                } else {
+                    charSequence271 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, charSequence271);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F271': "+ unionIndex271));
+            }
+        }
+        int unionIndex272 = (decoder.readIndex());
+        if (unionIndex272 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, null);
+        } else {
+            if (unionIndex272 == 1) {
+                Utf8 charSequence272;
+                Object oldString272 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(272);
+                if (oldString272 instanceof Utf8) {
+                    charSequence272 = (decoder).readString(((Utf8) oldString272));
+                } else {
+                    charSequence272 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, charSequence272);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F272': "+ unionIndex272));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex273 = (decoder.readIndex());
+        if (unionIndex273 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, null);
+        } else {
+            if (unionIndex273 == 1) {
+                Utf8 charSequence273;
+                Object oldString273 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(273);
+                if (oldString273 instanceof Utf8) {
+                    charSequence273 = (decoder).readString(((Utf8) oldString273));
+                } else {
+                    charSequence273 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, charSequence273);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F273': "+ unionIndex273));
+            }
+        }
+        int unionIndex274 = (decoder.readIndex());
+        if (unionIndex274 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, null);
+        } else {
+            if (unionIndex274 == 1) {
+                Utf8 charSequence274;
+                Object oldString274 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(274);
+                if (oldString274 instanceof Utf8) {
+                    charSequence274 = (decoder).readString(((Utf8) oldString274));
+                } else {
+                    charSequence274 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, charSequence274);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F274': "+ unionIndex274));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex275 = (decoder.readIndex());
+        if (unionIndex275 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, null);
+        } else {
+            if (unionIndex275 == 1) {
+                Utf8 charSequence275;
+                Object oldString275 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(275);
+                if (oldString275 instanceof Utf8) {
+                    charSequence275 = (decoder).readString(((Utf8) oldString275));
+                } else {
+                    charSequence275 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, charSequence275);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F275': "+ unionIndex275));
+            }
+        }
+        int unionIndex276 = (decoder.readIndex());
+        if (unionIndex276 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, null);
+        } else {
+            if (unionIndex276 == 1) {
+                Utf8 charSequence276;
+                Object oldString276 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(276);
+                if (oldString276 instanceof Utf8) {
+                    charSequence276 = (decoder).readString(((Utf8) oldString276));
+                } else {
+                    charSequence276 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, charSequence276);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F276': "+ unionIndex276));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex277 = (decoder.readIndex());
+        if (unionIndex277 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, null);
+        } else {
+            if (unionIndex277 == 1) {
+                Utf8 charSequence277;
+                Object oldString277 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(277);
+                if (oldString277 instanceof Utf8) {
+                    charSequence277 = (decoder).readString(((Utf8) oldString277));
+                } else {
+                    charSequence277 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, charSequence277);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F277': "+ unionIndex277));
+            }
+        }
+        int unionIndex278 = (decoder.readIndex());
+        if (unionIndex278 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, null);
+        } else {
+            if (unionIndex278 == 1) {
+                Utf8 charSequence278;
+                Object oldString278 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(278);
+                if (oldString278 instanceof Utf8) {
+                    charSequence278 = (decoder).readString(((Utf8) oldString278));
+                } else {
+                    charSequence278 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, charSequence278);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F278': "+ unionIndex278));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex279 = (decoder.readIndex());
+        if (unionIndex279 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, null);
+        } else {
+            if (unionIndex279 == 1) {
+                Utf8 charSequence279;
+                Object oldString279 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(279);
+                if (oldString279 instanceof Utf8) {
+                    charSequence279 = (decoder).readString(((Utf8) oldString279));
+                } else {
+                    charSequence279 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, charSequence279);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F279': "+ unionIndex279));
+            }
+        }
+        int unionIndex280 = (decoder.readIndex());
+        if (unionIndex280 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, null);
+        } else {
+            if (unionIndex280 == 1) {
+                Utf8 charSequence280;
+                Object oldString280 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(280);
+                if (oldString280 instanceof Utf8) {
+                    charSequence280 = (decoder).readString(((Utf8) oldString280));
+                } else {
+                    charSequence280 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, charSequence280);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F280': "+ unionIndex280));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex281 = (decoder.readIndex());
+        if (unionIndex281 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, null);
+        } else {
+            if (unionIndex281 == 1) {
+                Utf8 charSequence281;
+                Object oldString281 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(281);
+                if (oldString281 instanceof Utf8) {
+                    charSequence281 = (decoder).readString(((Utf8) oldString281));
+                } else {
+                    charSequence281 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, charSequence281);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F281': "+ unionIndex281));
+            }
+        }
+        int unionIndex282 = (decoder.readIndex());
+        if (unionIndex282 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, null);
+        } else {
+            if (unionIndex282 == 1) {
+                Utf8 charSequence282;
+                Object oldString282 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(282);
+                if (oldString282 instanceof Utf8) {
+                    charSequence282 = (decoder).readString(((Utf8) oldString282));
+                } else {
+                    charSequence282 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, charSequence282);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F282': "+ unionIndex282));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex283 = (decoder.readIndex());
+        if (unionIndex283 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, null);
+        } else {
+            if (unionIndex283 == 1) {
+                Utf8 charSequence283;
+                Object oldString283 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(283);
+                if (oldString283 instanceof Utf8) {
+                    charSequence283 = (decoder).readString(((Utf8) oldString283));
+                } else {
+                    charSequence283 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, charSequence283);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F283': "+ unionIndex283));
+            }
+        }
+        int unionIndex284 = (decoder.readIndex());
+        if (unionIndex284 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, null);
+        } else {
+            if (unionIndex284 == 1) {
+                Utf8 charSequence284;
+                Object oldString284 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(284);
+                if (oldString284 instanceof Utf8) {
+                    charSequence284 = (decoder).readString(((Utf8) oldString284));
+                } else {
+                    charSequence284 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, charSequence284);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F284': "+ unionIndex284));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex285 = (decoder.readIndex());
+        if (unionIndex285 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, null);
+        } else {
+            if (unionIndex285 == 1) {
+                Utf8 charSequence285;
+                Object oldString285 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(285);
+                if (oldString285 instanceof Utf8) {
+                    charSequence285 = (decoder).readString(((Utf8) oldString285));
+                } else {
+                    charSequence285 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, charSequence285);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F285': "+ unionIndex285));
+            }
+        }
+        int unionIndex286 = (decoder.readIndex());
+        if (unionIndex286 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, null);
+        } else {
+            if (unionIndex286 == 1) {
+                Utf8 charSequence286;
+                Object oldString286 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(286);
+                if (oldString286 instanceof Utf8) {
+                    charSequence286 = (decoder).readString(((Utf8) oldString286));
+                } else {
+                    charSequence286 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, charSequence286);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F286': "+ unionIndex286));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex287 = (decoder.readIndex());
+        if (unionIndex287 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, null);
+        } else {
+            if (unionIndex287 == 1) {
+                Utf8 charSequence287;
+                Object oldString287 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(287);
+                if (oldString287 instanceof Utf8) {
+                    charSequence287 = (decoder).readString(((Utf8) oldString287));
+                } else {
+                    charSequence287 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, charSequence287);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F287': "+ unionIndex287));
+            }
+        }
+        int unionIndex288 = (decoder.readIndex());
+        if (unionIndex288 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, null);
+        } else {
+            if (unionIndex288 == 1) {
+                Utf8 charSequence288;
+                Object oldString288 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(288);
+                if (oldString288 instanceof Utf8) {
+                    charSequence288 = (decoder).readString(((Utf8) oldString288));
+                } else {
+                    charSequence288 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, charSequence288);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F288': "+ unionIndex288));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex289 = (decoder.readIndex());
+        if (unionIndex289 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, null);
+        } else {
+            if (unionIndex289 == 1) {
+                Utf8 charSequence289;
+                Object oldString289 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(289);
+                if (oldString289 instanceof Utf8) {
+                    charSequence289 = (decoder).readString(((Utf8) oldString289));
+                } else {
+                    charSequence289 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, charSequence289);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F289': "+ unionIndex289));
+            }
+        }
+        int unionIndex290 = (decoder.readIndex());
+        if (unionIndex290 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, null);
+        } else {
+            if (unionIndex290 == 1) {
+                Utf8 charSequence290;
+                Object oldString290 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(290);
+                if (oldString290 instanceof Utf8) {
+                    charSequence290 = (decoder).readString(((Utf8) oldString290));
+                } else {
+                    charSequence290 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, charSequence290);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F290': "+ unionIndex290));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex291 = (decoder.readIndex());
+        if (unionIndex291 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, null);
+        } else {
+            if (unionIndex291 == 1) {
+                Utf8 charSequence291;
+                Object oldString291 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(291);
+                if (oldString291 instanceof Utf8) {
+                    charSequence291 = (decoder).readString(((Utf8) oldString291));
+                } else {
+                    charSequence291 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, charSequence291);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F291': "+ unionIndex291));
+            }
+        }
+        int unionIndex292 = (decoder.readIndex());
+        if (unionIndex292 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, null);
+        } else {
+            if (unionIndex292 == 1) {
+                Utf8 charSequence292;
+                Object oldString292 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(292);
+                if (oldString292 instanceof Utf8) {
+                    charSequence292 = (decoder).readString(((Utf8) oldString292));
+                } else {
+                    charSequence292 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, charSequence292);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F292': "+ unionIndex292));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex293 = (decoder.readIndex());
+        if (unionIndex293 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, null);
+        } else {
+            if (unionIndex293 == 1) {
+                Utf8 charSequence293;
+                Object oldString293 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(293);
+                if (oldString293 instanceof Utf8) {
+                    charSequence293 = (decoder).readString(((Utf8) oldString293));
+                } else {
+                    charSequence293 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, charSequence293);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F293': "+ unionIndex293));
+            }
+        }
+        int unionIndex294 = (decoder.readIndex());
+        if (unionIndex294 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, null);
+        } else {
+            if (unionIndex294 == 1) {
+                Utf8 charSequence294;
+                Object oldString294 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(294);
+                if (oldString294 instanceof Utf8) {
+                    charSequence294 = (decoder).readString(((Utf8) oldString294));
+                } else {
+                    charSequence294 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, charSequence294);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F294': "+ unionIndex294));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex295 = (decoder.readIndex());
+        if (unionIndex295 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, null);
+        } else {
+            if (unionIndex295 == 1) {
+                Utf8 charSequence295;
+                Object oldString295 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(295);
+                if (oldString295 instanceof Utf8) {
+                    charSequence295 = (decoder).readString(((Utf8) oldString295));
+                } else {
+                    charSequence295 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, charSequence295);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F295': "+ unionIndex295));
+            }
+        }
+        int unionIndex296 = (decoder.readIndex());
+        if (unionIndex296 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, null);
+        } else {
+            if (unionIndex296 == 1) {
+                Utf8 charSequence296;
+                Object oldString296 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(296);
+                if (oldString296 instanceof Utf8) {
+                    charSequence296 = (decoder).readString(((Utf8) oldString296));
+                } else {
+                    charSequence296 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, charSequence296);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F296': "+ unionIndex296));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex297 = (decoder.readIndex());
+        if (unionIndex297 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, null);
+        } else {
+            if (unionIndex297 == 1) {
+                Utf8 charSequence297;
+                Object oldString297 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(297);
+                if (oldString297 instanceof Utf8) {
+                    charSequence297 = (decoder).readString(((Utf8) oldString297));
+                } else {
+                    charSequence297 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, charSequence297);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F297': "+ unionIndex297));
+            }
+        }
+        int unionIndex298 = (decoder.readIndex());
+        if (unionIndex298 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, null);
+        } else {
+            if (unionIndex298 == 1) {
+                Utf8 charSequence298;
+                Object oldString298 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(298);
+                if (oldString298 instanceof Utf8) {
+                    charSequence298 = (decoder).readString(((Utf8) oldString298));
+                } else {
+                    charSequence298 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, charSequence298);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F298': "+ unionIndex298));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex299 = (decoder.readIndex());
+        if (unionIndex299 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, null);
+        } else {
+            if (unionIndex299 == 1) {
+                Utf8 charSequence299;
+                Object oldString299 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(299);
+                if (oldString299 instanceof Utf8) {
+                    charSequence299 = (decoder).readString(((Utf8) oldString299));
+                } else {
+                    charSequence299 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, charSequence299);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F299': "+ unionIndex299));
+            }
+        }
+        int unionIndex300 = (decoder.readIndex());
+        if (unionIndex300 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, null);
+        } else {
+            if (unionIndex300 == 1) {
+                Utf8 charSequence300;
+                Object oldString300 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(300);
+                if (oldString300 instanceof Utf8) {
+                    charSequence300 = (decoder).readString(((Utf8) oldString300));
+                } else {
+                    charSequence300 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, charSequence300);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F300': "+ unionIndex300));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex301 = (decoder.readIndex());
+        if (unionIndex301 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, null);
+        } else {
+            if (unionIndex301 == 1) {
+                Utf8 charSequence301;
+                Object oldString301 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(301);
+                if (oldString301 instanceof Utf8) {
+                    charSequence301 = (decoder).readString(((Utf8) oldString301));
+                } else {
+                    charSequence301 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, charSequence301);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F301': "+ unionIndex301));
+            }
+        }
+        int unionIndex302 = (decoder.readIndex());
+        if (unionIndex302 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, null);
+        } else {
+            if (unionIndex302 == 1) {
+                Utf8 charSequence302;
+                Object oldString302 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(302);
+                if (oldString302 instanceof Utf8) {
+                    charSequence302 = (decoder).readString(((Utf8) oldString302));
+                } else {
+                    charSequence302 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, charSequence302);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F302': "+ unionIndex302));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex303 = (decoder.readIndex());
+        if (unionIndex303 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, null);
+        } else {
+            if (unionIndex303 == 1) {
+                Utf8 charSequence303;
+                Object oldString303 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(303);
+                if (oldString303 instanceof Utf8) {
+                    charSequence303 = (decoder).readString(((Utf8) oldString303));
+                } else {
+                    charSequence303 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, charSequence303);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F303': "+ unionIndex303));
+            }
+        }
+        int unionIndex304 = (decoder.readIndex());
+        if (unionIndex304 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, null);
+        } else {
+            if (unionIndex304 == 1) {
+                Utf8 charSequence304;
+                Object oldString304 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(304);
+                if (oldString304 instanceof Utf8) {
+                    charSequence304 = (decoder).readString(((Utf8) oldString304));
+                } else {
+                    charSequence304 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, charSequence304);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F304': "+ unionIndex304));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex305 = (decoder.readIndex());
+        if (unionIndex305 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, null);
+        } else {
+            if (unionIndex305 == 1) {
+                Utf8 charSequence305;
+                Object oldString305 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(305);
+                if (oldString305 instanceof Utf8) {
+                    charSequence305 = (decoder).readString(((Utf8) oldString305));
+                } else {
+                    charSequence305 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, charSequence305);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F305': "+ unionIndex305));
+            }
+        }
+        int unionIndex306 = (decoder.readIndex());
+        if (unionIndex306 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, null);
+        } else {
+            if (unionIndex306 == 1) {
+                Utf8 charSequence306;
+                Object oldString306 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(306);
+                if (oldString306 instanceof Utf8) {
+                    charSequence306 = (decoder).readString(((Utf8) oldString306));
+                } else {
+                    charSequence306 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, charSequence306);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F306': "+ unionIndex306));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex307 = (decoder.readIndex());
+        if (unionIndex307 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, null);
+        } else {
+            if (unionIndex307 == 1) {
+                Utf8 charSequence307;
+                Object oldString307 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(307);
+                if (oldString307 instanceof Utf8) {
+                    charSequence307 = (decoder).readString(((Utf8) oldString307));
+                } else {
+                    charSequence307 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, charSequence307);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F307': "+ unionIndex307));
+            }
+        }
+        int unionIndex308 = (decoder.readIndex());
+        if (unionIndex308 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, null);
+        } else {
+            if (unionIndex308 == 1) {
+                Utf8 charSequence308;
+                Object oldString308 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(308);
+                if (oldString308 instanceof Utf8) {
+                    charSequence308 = (decoder).readString(((Utf8) oldString308));
+                } else {
+                    charSequence308 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, charSequence308);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F308': "+ unionIndex308));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex309 = (decoder.readIndex());
+        if (unionIndex309 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, null);
+        } else {
+            if (unionIndex309 == 1) {
+                Utf8 charSequence309;
+                Object oldString309 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(309);
+                if (oldString309 instanceof Utf8) {
+                    charSequence309 = (decoder).readString(((Utf8) oldString309));
+                } else {
+                    charSequence309 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, charSequence309);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F309': "+ unionIndex309));
+            }
+        }
+        int unionIndex310 = (decoder.readIndex());
+        if (unionIndex310 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, null);
+        } else {
+            if (unionIndex310 == 1) {
+                Utf8 charSequence310;
+                Object oldString310 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(310);
+                if (oldString310 instanceof Utf8) {
+                    charSequence310 = (decoder).readString(((Utf8) oldString310));
+                } else {
+                    charSequence310 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, charSequence310);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F310': "+ unionIndex310));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex311 = (decoder.readIndex());
+        if (unionIndex311 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, null);
+        } else {
+            if (unionIndex311 == 1) {
+                Utf8 charSequence311;
+                Object oldString311 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(311);
+                if (oldString311 instanceof Utf8) {
+                    charSequence311 = (decoder).readString(((Utf8) oldString311));
+                } else {
+                    charSequence311 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, charSequence311);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F311': "+ unionIndex311));
+            }
+        }
+        int unionIndex312 = (decoder.readIndex());
+        if (unionIndex312 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, null);
+        } else {
+            if (unionIndex312 == 1) {
+                Utf8 charSequence312;
+                Object oldString312 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(312);
+                if (oldString312 instanceof Utf8) {
+                    charSequence312 = (decoder).readString(((Utf8) oldString312));
+                } else {
+                    charSequence312 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, charSequence312);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F312': "+ unionIndex312));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex313 = (decoder.readIndex());
+        if (unionIndex313 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, null);
+        } else {
+            if (unionIndex313 == 1) {
+                Utf8 charSequence313;
+                Object oldString313 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(313);
+                if (oldString313 instanceof Utf8) {
+                    charSequence313 = (decoder).readString(((Utf8) oldString313));
+                } else {
+                    charSequence313 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, charSequence313);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F313': "+ unionIndex313));
+            }
+        }
+        int unionIndex314 = (decoder.readIndex());
+        if (unionIndex314 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, null);
+        } else {
+            if (unionIndex314 == 1) {
+                Utf8 charSequence314;
+                Object oldString314 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(314);
+                if (oldString314 instanceof Utf8) {
+                    charSequence314 = (decoder).readString(((Utf8) oldString314));
+                } else {
+                    charSequence314 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, charSequence314);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F314': "+ unionIndex314));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex315 = (decoder.readIndex());
+        if (unionIndex315 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, null);
+        } else {
+            if (unionIndex315 == 1) {
+                Utf8 charSequence315;
+                Object oldString315 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(315);
+                if (oldString315 instanceof Utf8) {
+                    charSequence315 = (decoder).readString(((Utf8) oldString315));
+                } else {
+                    charSequence315 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, charSequence315);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F315': "+ unionIndex315));
+            }
+        }
+        int unionIndex316 = (decoder.readIndex());
+        if (unionIndex316 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, null);
+        } else {
+            if (unionIndex316 == 1) {
+                Utf8 charSequence316;
+                Object oldString316 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(316);
+                if (oldString316 instanceof Utf8) {
+                    charSequence316 = (decoder).readString(((Utf8) oldString316));
+                } else {
+                    charSequence316 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, charSequence316);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F316': "+ unionIndex316));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex317 = (decoder.readIndex());
+        if (unionIndex317 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, null);
+        } else {
+            if (unionIndex317 == 1) {
+                Utf8 charSequence317;
+                Object oldString317 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(317);
+                if (oldString317 instanceof Utf8) {
+                    charSequence317 = (decoder).readString(((Utf8) oldString317));
+                } else {
+                    charSequence317 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, charSequence317);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F317': "+ unionIndex317));
+            }
+        }
+        int unionIndex318 = (decoder.readIndex());
+        if (unionIndex318 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, null);
+        } else {
+            if (unionIndex318 == 1) {
+                Utf8 charSequence318;
+                Object oldString318 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(318);
+                if (oldString318 instanceof Utf8) {
+                    charSequence318 = (decoder).readString(((Utf8) oldString318));
+                } else {
+                    charSequence318 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, charSequence318);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F318': "+ unionIndex318));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex319 = (decoder.readIndex());
+        if (unionIndex319 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, null);
+        } else {
+            if (unionIndex319 == 1) {
+                Utf8 charSequence319;
+                Object oldString319 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(319);
+                if (oldString319 instanceof Utf8) {
+                    charSequence319 = (decoder).readString(((Utf8) oldString319));
+                } else {
+                    charSequence319 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, charSequence319);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F319': "+ unionIndex319));
+            }
+        }
+        int unionIndex320 = (decoder.readIndex());
+        if (unionIndex320 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, null);
+        } else {
+            if (unionIndex320 == 1) {
+                Utf8 charSequence320;
+                Object oldString320 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(320);
+                if (oldString320 instanceof Utf8) {
+                    charSequence320 = (decoder).readString(((Utf8) oldString320));
+                } else {
+                    charSequence320 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, charSequence320);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F320': "+ unionIndex320));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex321 = (decoder.readIndex());
+        if (unionIndex321 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, null);
+        } else {
+            if (unionIndex321 == 1) {
+                Utf8 charSequence321;
+                Object oldString321 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(321);
+                if (oldString321 instanceof Utf8) {
+                    charSequence321 = (decoder).readString(((Utf8) oldString321));
+                } else {
+                    charSequence321 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, charSequence321);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F321': "+ unionIndex321));
+            }
+        }
+        int unionIndex322 = (decoder.readIndex());
+        if (unionIndex322 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, null);
+        } else {
+            if (unionIndex322 == 1) {
+                Utf8 charSequence322;
+                Object oldString322 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(322);
+                if (oldString322 instanceof Utf8) {
+                    charSequence322 = (decoder).readString(((Utf8) oldString322));
+                } else {
+                    charSequence322 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, charSequence322);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F322': "+ unionIndex322));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex323 = (decoder.readIndex());
+        if (unionIndex323 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, null);
+        } else {
+            if (unionIndex323 == 1) {
+                Utf8 charSequence323;
+                Object oldString323 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(323);
+                if (oldString323 instanceof Utf8) {
+                    charSequence323 = (decoder).readString(((Utf8) oldString323));
+                } else {
+                    charSequence323 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, charSequence323);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F323': "+ unionIndex323));
+            }
+        }
+        int unionIndex324 = (decoder.readIndex());
+        if (unionIndex324 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, null);
+        } else {
+            if (unionIndex324 == 1) {
+                Utf8 charSequence324;
+                Object oldString324 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(324);
+                if (oldString324 instanceof Utf8) {
+                    charSequence324 = (decoder).readString(((Utf8) oldString324));
+                } else {
+                    charSequence324 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, charSequence324);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F324': "+ unionIndex324));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex325 = (decoder.readIndex());
+        if (unionIndex325 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, null);
+        } else {
+            if (unionIndex325 == 1) {
+                Utf8 charSequence325;
+                Object oldString325 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(325);
+                if (oldString325 instanceof Utf8) {
+                    charSequence325 = (decoder).readString(((Utf8) oldString325));
+                } else {
+                    charSequence325 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, charSequence325);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F325': "+ unionIndex325));
+            }
+        }
+        int unionIndex326 = (decoder.readIndex());
+        if (unionIndex326 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, null);
+        } else {
+            if (unionIndex326 == 1) {
+                Utf8 charSequence326;
+                Object oldString326 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(326);
+                if (oldString326 instanceof Utf8) {
+                    charSequence326 = (decoder).readString(((Utf8) oldString326));
+                } else {
+                    charSequence326 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, charSequence326);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F326': "+ unionIndex326));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex327 = (decoder.readIndex());
+        if (unionIndex327 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, null);
+        } else {
+            if (unionIndex327 == 1) {
+                Utf8 charSequence327;
+                Object oldString327 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(327);
+                if (oldString327 instanceof Utf8) {
+                    charSequence327 = (decoder).readString(((Utf8) oldString327));
+                } else {
+                    charSequence327 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, charSequence327);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F327': "+ unionIndex327));
+            }
+        }
+        int unionIndex328 = (decoder.readIndex());
+        if (unionIndex328 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, null);
+        } else {
+            if (unionIndex328 == 1) {
+                Utf8 charSequence328;
+                Object oldString328 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(328);
+                if (oldString328 instanceof Utf8) {
+                    charSequence328 = (decoder).readString(((Utf8) oldString328));
+                } else {
+                    charSequence328 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, charSequence328);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F328': "+ unionIndex328));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex329 = (decoder.readIndex());
+        if (unionIndex329 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, null);
+        } else {
+            if (unionIndex329 == 1) {
+                Utf8 charSequence329;
+                Object oldString329 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(329);
+                if (oldString329 instanceof Utf8) {
+                    charSequence329 = (decoder).readString(((Utf8) oldString329));
+                } else {
+                    charSequence329 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, charSequence329);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F329': "+ unionIndex329));
+            }
+        }
+        int unionIndex330 = (decoder.readIndex());
+        if (unionIndex330 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, null);
+        } else {
+            if (unionIndex330 == 1) {
+                Utf8 charSequence330;
+                Object oldString330 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(330);
+                if (oldString330 instanceof Utf8) {
+                    charSequence330 = (decoder).readString(((Utf8) oldString330));
+                } else {
+                    charSequence330 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, charSequence330);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F330': "+ unionIndex330));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex331 = (decoder.readIndex());
+        if (unionIndex331 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, null);
+        } else {
+            if (unionIndex331 == 1) {
+                Utf8 charSequence331;
+                Object oldString331 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(331);
+                if (oldString331 instanceof Utf8) {
+                    charSequence331 = (decoder).readString(((Utf8) oldString331));
+                } else {
+                    charSequence331 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, charSequence331);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F331': "+ unionIndex331));
+            }
+        }
+        int unionIndex332 = (decoder.readIndex());
+        if (unionIndex332 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, null);
+        } else {
+            if (unionIndex332 == 1) {
+                Utf8 charSequence332;
+                Object oldString332 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(332);
+                if (oldString332 instanceof Utf8) {
+                    charSequence332 = (decoder).readString(((Utf8) oldString332));
+                } else {
+                    charSequence332 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, charSequence332);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F332': "+ unionIndex332));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex333 = (decoder.readIndex());
+        if (unionIndex333 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, null);
+        } else {
+            if (unionIndex333 == 1) {
+                Utf8 charSequence333;
+                Object oldString333 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(333);
+                if (oldString333 instanceof Utf8) {
+                    charSequence333 = (decoder).readString(((Utf8) oldString333));
+                } else {
+                    charSequence333 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, charSequence333);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F333': "+ unionIndex333));
+            }
+        }
+        int unionIndex334 = (decoder.readIndex());
+        if (unionIndex334 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, null);
+        } else {
+            if (unionIndex334 == 1) {
+                Utf8 charSequence334;
+                Object oldString334 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(334);
+                if (oldString334 instanceof Utf8) {
+                    charSequence334 = (decoder).readString(((Utf8) oldString334));
+                } else {
+                    charSequence334 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, charSequence334);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F334': "+ unionIndex334));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex335 = (decoder.readIndex());
+        if (unionIndex335 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, null);
+        } else {
+            if (unionIndex335 == 1) {
+                Utf8 charSequence335;
+                Object oldString335 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(335);
+                if (oldString335 instanceof Utf8) {
+                    charSequence335 = (decoder).readString(((Utf8) oldString335));
+                } else {
+                    charSequence335 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, charSequence335);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F335': "+ unionIndex335));
+            }
+        }
+        int unionIndex336 = (decoder.readIndex());
+        if (unionIndex336 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, null);
+        } else {
+            if (unionIndex336 == 1) {
+                Utf8 charSequence336;
+                Object oldString336 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(336);
+                if (oldString336 instanceof Utf8) {
+                    charSequence336 = (decoder).readString(((Utf8) oldString336));
+                } else {
+                    charSequence336 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, charSequence336);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F336': "+ unionIndex336));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex337 = (decoder.readIndex());
+        if (unionIndex337 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, null);
+        } else {
+            if (unionIndex337 == 1) {
+                Utf8 charSequence337;
+                Object oldString337 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(337);
+                if (oldString337 instanceof Utf8) {
+                    charSequence337 = (decoder).readString(((Utf8) oldString337));
+                } else {
+                    charSequence337 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, charSequence337);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F337': "+ unionIndex337));
+            }
+        }
+        int unionIndex338 = (decoder.readIndex());
+        if (unionIndex338 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, null);
+        } else {
+            if (unionIndex338 == 1) {
+                Utf8 charSequence338;
+                Object oldString338 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(338);
+                if (oldString338 instanceof Utf8) {
+                    charSequence338 = (decoder).readString(((Utf8) oldString338));
+                } else {
+                    charSequence338 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, charSequence338);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F338': "+ unionIndex338));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex339 = (decoder.readIndex());
+        if (unionIndex339 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, null);
+        } else {
+            if (unionIndex339 == 1) {
+                Utf8 charSequence339;
+                Object oldString339 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(339);
+                if (oldString339 instanceof Utf8) {
+                    charSequence339 = (decoder).readString(((Utf8) oldString339));
+                } else {
+                    charSequence339 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, charSequence339);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F339': "+ unionIndex339));
+            }
+        }
+        int unionIndex340 = (decoder.readIndex());
+        if (unionIndex340 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, null);
+        } else {
+            if (unionIndex340 == 1) {
+                Utf8 charSequence340;
+                Object oldString340 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(340);
+                if (oldString340 instanceof Utf8) {
+                    charSequence340 = (decoder).readString(((Utf8) oldString340));
+                } else {
+                    charSequence340 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, charSequence340);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F340': "+ unionIndex340));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex341 = (decoder.readIndex());
+        if (unionIndex341 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, null);
+        } else {
+            if (unionIndex341 == 1) {
+                Utf8 charSequence341;
+                Object oldString341 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(341);
+                if (oldString341 instanceof Utf8) {
+                    charSequence341 = (decoder).readString(((Utf8) oldString341));
+                } else {
+                    charSequence341 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, charSequence341);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F341': "+ unionIndex341));
+            }
+        }
+        int unionIndex342 = (decoder.readIndex());
+        if (unionIndex342 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, null);
+        } else {
+            if (unionIndex342 == 1) {
+                Utf8 charSequence342;
+                Object oldString342 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(342);
+                if (oldString342 instanceof Utf8) {
+                    charSequence342 = (decoder).readString(((Utf8) oldString342));
+                } else {
+                    charSequence342 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, charSequence342);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F342': "+ unionIndex342));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex343 = (decoder.readIndex());
+        if (unionIndex343 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, null);
+        } else {
+            if (unionIndex343 == 1) {
+                Utf8 charSequence343;
+                Object oldString343 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(343);
+                if (oldString343 instanceof Utf8) {
+                    charSequence343 = (decoder).readString(((Utf8) oldString343));
+                } else {
+                    charSequence343 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, charSequence343);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F343': "+ unionIndex343));
+            }
+        }
+        int unionIndex344 = (decoder.readIndex());
+        if (unionIndex344 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, null);
+        } else {
+            if (unionIndex344 == 1) {
+                Utf8 charSequence344;
+                Object oldString344 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(344);
+                if (oldString344 instanceof Utf8) {
+                    charSequence344 = (decoder).readString(((Utf8) oldString344));
+                } else {
+                    charSequence344 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, charSequence344);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F344': "+ unionIndex344));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex345 = (decoder.readIndex());
+        if (unionIndex345 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, null);
+        } else {
+            if (unionIndex345 == 1) {
+                Utf8 charSequence345;
+                Object oldString345 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(345);
+                if (oldString345 instanceof Utf8) {
+                    charSequence345 = (decoder).readString(((Utf8) oldString345));
+                } else {
+                    charSequence345 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, charSequence345);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F345': "+ unionIndex345));
+            }
+        }
+        int unionIndex346 = (decoder.readIndex());
+        if (unionIndex346 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, null);
+        } else {
+            if (unionIndex346 == 1) {
+                Utf8 charSequence346;
+                Object oldString346 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(346);
+                if (oldString346 instanceof Utf8) {
+                    charSequence346 = (decoder).readString(((Utf8) oldString346));
+                } else {
+                    charSequence346 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, charSequence346);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F346': "+ unionIndex346));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex347 = (decoder.readIndex());
+        if (unionIndex347 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, null);
+        } else {
+            if (unionIndex347 == 1) {
+                Utf8 charSequence347;
+                Object oldString347 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(347);
+                if (oldString347 instanceof Utf8) {
+                    charSequence347 = (decoder).readString(((Utf8) oldString347));
+                } else {
+                    charSequence347 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, charSequence347);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F347': "+ unionIndex347));
+            }
+        }
+        int unionIndex348 = (decoder.readIndex());
+        if (unionIndex348 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, null);
+        } else {
+            if (unionIndex348 == 1) {
+                Utf8 charSequence348;
+                Object oldString348 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(348);
+                if (oldString348 instanceof Utf8) {
+                    charSequence348 = (decoder).readString(((Utf8) oldString348));
+                } else {
+                    charSequence348 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, charSequence348);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F348': "+ unionIndex348));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex349 = (decoder.readIndex());
+        if (unionIndex349 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, null);
+        } else {
+            if (unionIndex349 == 1) {
+                Utf8 charSequence349;
+                Object oldString349 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(349);
+                if (oldString349 instanceof Utf8) {
+                    charSequence349 = (decoder).readString(((Utf8) oldString349));
+                } else {
+                    charSequence349 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, charSequence349);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F349': "+ unionIndex349));
+            }
+        }
+        int unionIndex350 = (decoder.readIndex());
+        if (unionIndex350 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, null);
+        } else {
+            if (unionIndex350 == 1) {
+                Utf8 charSequence350;
+                Object oldString350 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(350);
+                if (oldString350 instanceof Utf8) {
+                    charSequence350 = (decoder).readString(((Utf8) oldString350));
+                } else {
+                    charSequence350 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, charSequence350);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F350': "+ unionIndex350));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex351 = (decoder.readIndex());
+        if (unionIndex351 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, null);
+        } else {
+            if (unionIndex351 == 1) {
+                Utf8 charSequence351;
+                Object oldString351 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(351);
+                if (oldString351 instanceof Utf8) {
+                    charSequence351 = (decoder).readString(((Utf8) oldString351));
+                } else {
+                    charSequence351 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, charSequence351);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F351': "+ unionIndex351));
+            }
+        }
+        int unionIndex352 = (decoder.readIndex());
+        if (unionIndex352 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, null);
+        } else {
+            if (unionIndex352 == 1) {
+                Utf8 charSequence352;
+                Object oldString352 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(352);
+                if (oldString352 instanceof Utf8) {
+                    charSequence352 = (decoder).readString(((Utf8) oldString352));
+                } else {
+                    charSequence352 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, charSequence352);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F352': "+ unionIndex352));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex353 = (decoder.readIndex());
+        if (unionIndex353 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, null);
+        } else {
+            if (unionIndex353 == 1) {
+                Utf8 charSequence353;
+                Object oldString353 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(353);
+                if (oldString353 instanceof Utf8) {
+                    charSequence353 = (decoder).readString(((Utf8) oldString353));
+                } else {
+                    charSequence353 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, charSequence353);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F353': "+ unionIndex353));
+            }
+        }
+        int unionIndex354 = (decoder.readIndex());
+        if (unionIndex354 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, null);
+        } else {
+            if (unionIndex354 == 1) {
+                Utf8 charSequence354;
+                Object oldString354 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(354);
+                if (oldString354 instanceof Utf8) {
+                    charSequence354 = (decoder).readString(((Utf8) oldString354));
+                } else {
+                    charSequence354 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, charSequence354);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F354': "+ unionIndex354));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex355 = (decoder.readIndex());
+        if (unionIndex355 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, null);
+        } else {
+            if (unionIndex355 == 1) {
+                Utf8 charSequence355;
+                Object oldString355 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(355);
+                if (oldString355 instanceof Utf8) {
+                    charSequence355 = (decoder).readString(((Utf8) oldString355));
+                } else {
+                    charSequence355 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, charSequence355);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F355': "+ unionIndex355));
+            }
+        }
+        int unionIndex356 = (decoder.readIndex());
+        if (unionIndex356 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, null);
+        } else {
+            if (unionIndex356 == 1) {
+                Utf8 charSequence356;
+                Object oldString356 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(356);
+                if (oldString356 instanceof Utf8) {
+                    charSequence356 = (decoder).readString(((Utf8) oldString356));
+                } else {
+                    charSequence356 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, charSequence356);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F356': "+ unionIndex356));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex357 = (decoder.readIndex());
+        if (unionIndex357 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, null);
+        } else {
+            if (unionIndex357 == 1) {
+                Utf8 charSequence357;
+                Object oldString357 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(357);
+                if (oldString357 instanceof Utf8) {
+                    charSequence357 = (decoder).readString(((Utf8) oldString357));
+                } else {
+                    charSequence357 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, charSequence357);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F357': "+ unionIndex357));
+            }
+        }
+        int unionIndex358 = (decoder.readIndex());
+        if (unionIndex358 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, null);
+        } else {
+            if (unionIndex358 == 1) {
+                Utf8 charSequence358;
+                Object oldString358 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(358);
+                if (oldString358 instanceof Utf8) {
+                    charSequence358 = (decoder).readString(((Utf8) oldString358));
+                } else {
+                    charSequence358 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, charSequence358);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F358': "+ unionIndex358));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex359 = (decoder.readIndex());
+        if (unionIndex359 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, null);
+        } else {
+            if (unionIndex359 == 1) {
+                Utf8 charSequence359;
+                Object oldString359 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(359);
+                if (oldString359 instanceof Utf8) {
+                    charSequence359 = (decoder).readString(((Utf8) oldString359));
+                } else {
+                    charSequence359 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, charSequence359);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F359': "+ unionIndex359));
+            }
+        }
+        int unionIndex360 = (decoder.readIndex());
+        if (unionIndex360 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, null);
+        } else {
+            if (unionIndex360 == 1) {
+                Utf8 charSequence360;
+                Object oldString360 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(360);
+                if (oldString360 instanceof Utf8) {
+                    charSequence360 = (decoder).readString(((Utf8) oldString360));
+                } else {
+                    charSequence360 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, charSequence360);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F360': "+ unionIndex360));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex361 = (decoder.readIndex());
+        if (unionIndex361 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, null);
+        } else {
+            if (unionIndex361 == 1) {
+                Utf8 charSequence361;
+                Object oldString361 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(361);
+                if (oldString361 instanceof Utf8) {
+                    charSequence361 = (decoder).readString(((Utf8) oldString361));
+                } else {
+                    charSequence361 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, charSequence361);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F361': "+ unionIndex361));
+            }
+        }
+        int unionIndex362 = (decoder.readIndex());
+        if (unionIndex362 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, null);
+        } else {
+            if (unionIndex362 == 1) {
+                Utf8 charSequence362;
+                Object oldString362 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(362);
+                if (oldString362 instanceof Utf8) {
+                    charSequence362 = (decoder).readString(((Utf8) oldString362));
+                } else {
+                    charSequence362 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, charSequence362);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F362': "+ unionIndex362));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex363 = (decoder.readIndex());
+        if (unionIndex363 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, null);
+        } else {
+            if (unionIndex363 == 1) {
+                Utf8 charSequence363;
+                Object oldString363 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(363);
+                if (oldString363 instanceof Utf8) {
+                    charSequence363 = (decoder).readString(((Utf8) oldString363));
+                } else {
+                    charSequence363 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, charSequence363);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F363': "+ unionIndex363));
+            }
+        }
+        int unionIndex364 = (decoder.readIndex());
+        if (unionIndex364 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, null);
+        } else {
+            if (unionIndex364 == 1) {
+                Utf8 charSequence364;
+                Object oldString364 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(364);
+                if (oldString364 instanceof Utf8) {
+                    charSequence364 = (decoder).readString(((Utf8) oldString364));
+                } else {
+                    charSequence364 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, charSequence364);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F364': "+ unionIndex364));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex365 = (decoder.readIndex());
+        if (unionIndex365 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, null);
+        } else {
+            if (unionIndex365 == 1) {
+                Utf8 charSequence365;
+                Object oldString365 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(365);
+                if (oldString365 instanceof Utf8) {
+                    charSequence365 = (decoder).readString(((Utf8) oldString365));
+                } else {
+                    charSequence365 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, charSequence365);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F365': "+ unionIndex365));
+            }
+        }
+        int unionIndex366 = (decoder.readIndex());
+        if (unionIndex366 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, null);
+        } else {
+            if (unionIndex366 == 1) {
+                Utf8 charSequence366;
+                Object oldString366 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(366);
+                if (oldString366 instanceof Utf8) {
+                    charSequence366 = (decoder).readString(((Utf8) oldString366));
+                } else {
+                    charSequence366 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, charSequence366);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F366': "+ unionIndex366));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex367 = (decoder.readIndex());
+        if (unionIndex367 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, null);
+        } else {
+            if (unionIndex367 == 1) {
+                Utf8 charSequence367;
+                Object oldString367 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(367);
+                if (oldString367 instanceof Utf8) {
+                    charSequence367 = (decoder).readString(((Utf8) oldString367));
+                } else {
+                    charSequence367 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, charSequence367);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F367': "+ unionIndex367));
+            }
+        }
+        int unionIndex368 = (decoder.readIndex());
+        if (unionIndex368 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, null);
+        } else {
+            if (unionIndex368 == 1) {
+                Utf8 charSequence368;
+                Object oldString368 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(368);
+                if (oldString368 instanceof Utf8) {
+                    charSequence368 = (decoder).readString(((Utf8) oldString368));
+                } else {
+                    charSequence368 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, charSequence368);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F368': "+ unionIndex368));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex369 = (decoder.readIndex());
+        if (unionIndex369 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, null);
+        } else {
+            if (unionIndex369 == 1) {
+                Utf8 charSequence369;
+                Object oldString369 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(369);
+                if (oldString369 instanceof Utf8) {
+                    charSequence369 = (decoder).readString(((Utf8) oldString369));
+                } else {
+                    charSequence369 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, charSequence369);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F369': "+ unionIndex369));
+            }
+        }
+        int unionIndex370 = (decoder.readIndex());
+        if (unionIndex370 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, null);
+        } else {
+            if (unionIndex370 == 1) {
+                Utf8 charSequence370;
+                Object oldString370 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(370);
+                if (oldString370 instanceof Utf8) {
+                    charSequence370 = (decoder).readString(((Utf8) oldString370));
+                } else {
+                    charSequence370 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, charSequence370);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F370': "+ unionIndex370));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex371 = (decoder.readIndex());
+        if (unionIndex371 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, null);
+        } else {
+            if (unionIndex371 == 1) {
+                Utf8 charSequence371;
+                Object oldString371 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(371);
+                if (oldString371 instanceof Utf8) {
+                    charSequence371 = (decoder).readString(((Utf8) oldString371));
+                } else {
+                    charSequence371 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, charSequence371);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F371': "+ unionIndex371));
+            }
+        }
+        int unionIndex372 = (decoder.readIndex());
+        if (unionIndex372 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, null);
+        } else {
+            if (unionIndex372 == 1) {
+                Utf8 charSequence372;
+                Object oldString372 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(372);
+                if (oldString372 instanceof Utf8) {
+                    charSequence372 = (decoder).readString(((Utf8) oldString372));
+                } else {
+                    charSequence372 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, charSequence372);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F372': "+ unionIndex372));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex373 = (decoder.readIndex());
+        if (unionIndex373 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, null);
+        } else {
+            if (unionIndex373 == 1) {
+                Utf8 charSequence373;
+                Object oldString373 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(373);
+                if (oldString373 instanceof Utf8) {
+                    charSequence373 = (decoder).readString(((Utf8) oldString373));
+                } else {
+                    charSequence373 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, charSequence373);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F373': "+ unionIndex373));
+            }
+        }
+        int unionIndex374 = (decoder.readIndex());
+        if (unionIndex374 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, null);
+        } else {
+            if (unionIndex374 == 1) {
+                Utf8 charSequence374;
+                Object oldString374 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(374);
+                if (oldString374 instanceof Utf8) {
+                    charSequence374 = (decoder).readString(((Utf8) oldString374));
+                } else {
+                    charSequence374 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, charSequence374);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F374': "+ unionIndex374));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex375 = (decoder.readIndex());
+        if (unionIndex375 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, null);
+        } else {
+            if (unionIndex375 == 1) {
+                Utf8 charSequence375;
+                Object oldString375 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(375);
+                if (oldString375 instanceof Utf8) {
+                    charSequence375 = (decoder).readString(((Utf8) oldString375));
+                } else {
+                    charSequence375 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, charSequence375);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F375': "+ unionIndex375));
+            }
+        }
+        int unionIndex376 = (decoder.readIndex());
+        if (unionIndex376 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, null);
+        } else {
+            if (unionIndex376 == 1) {
+                Utf8 charSequence376;
+                Object oldString376 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(376);
+                if (oldString376 instanceof Utf8) {
+                    charSequence376 = (decoder).readString(((Utf8) oldString376));
+                } else {
+                    charSequence376 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, charSequence376);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F376': "+ unionIndex376));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex377 = (decoder.readIndex());
+        if (unionIndex377 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, null);
+        } else {
+            if (unionIndex377 == 1) {
+                Utf8 charSequence377;
+                Object oldString377 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(377);
+                if (oldString377 instanceof Utf8) {
+                    charSequence377 = (decoder).readString(((Utf8) oldString377));
+                } else {
+                    charSequence377 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, charSequence377);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F377': "+ unionIndex377));
+            }
+        }
+        int unionIndex378 = (decoder.readIndex());
+        if (unionIndex378 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, null);
+        } else {
+            if (unionIndex378 == 1) {
+                Utf8 charSequence378;
+                Object oldString378 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(378);
+                if (oldString378 instanceof Utf8) {
+                    charSequence378 = (decoder).readString(((Utf8) oldString378));
+                } else {
+                    charSequence378 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, charSequence378);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F378': "+ unionIndex378));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex379 = (decoder.readIndex());
+        if (unionIndex379 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, null);
+        } else {
+            if (unionIndex379 == 1) {
+                Utf8 charSequence379;
+                Object oldString379 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(379);
+                if (oldString379 instanceof Utf8) {
+                    charSequence379 = (decoder).readString(((Utf8) oldString379));
+                } else {
+                    charSequence379 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, charSequence379);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F379': "+ unionIndex379));
+            }
+        }
+        int unionIndex380 = (decoder.readIndex());
+        if (unionIndex380 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, null);
+        } else {
+            if (unionIndex380 == 1) {
+                Utf8 charSequence380;
+                Object oldString380 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(380);
+                if (oldString380 instanceof Utf8) {
+                    charSequence380 = (decoder).readString(((Utf8) oldString380));
+                } else {
+                    charSequence380 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, charSequence380);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F380': "+ unionIndex380));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex381 = (decoder.readIndex());
+        if (unionIndex381 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, null);
+        } else {
+            if (unionIndex381 == 1) {
+                Utf8 charSequence381;
+                Object oldString381 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(381);
+                if (oldString381 instanceof Utf8) {
+                    charSequence381 = (decoder).readString(((Utf8) oldString381));
+                } else {
+                    charSequence381 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, charSequence381);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F381': "+ unionIndex381));
+            }
+        }
+        int unionIndex382 = (decoder.readIndex());
+        if (unionIndex382 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, null);
+        } else {
+            if (unionIndex382 == 1) {
+                Utf8 charSequence382;
+                Object oldString382 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(382);
+                if (oldString382 instanceof Utf8) {
+                    charSequence382 = (decoder).readString(((Utf8) oldString382));
+                } else {
+                    charSequence382 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, charSequence382);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F382': "+ unionIndex382));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex383 = (decoder.readIndex());
+        if (unionIndex383 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, null);
+        } else {
+            if (unionIndex383 == 1) {
+                Utf8 charSequence383;
+                Object oldString383 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(383);
+                if (oldString383 instanceof Utf8) {
+                    charSequence383 = (decoder).readString(((Utf8) oldString383));
+                } else {
+                    charSequence383 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, charSequence383);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F383': "+ unionIndex383));
+            }
+        }
+        int unionIndex384 = (decoder.readIndex());
+        if (unionIndex384 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, null);
+        } else {
+            if (unionIndex384 == 1) {
+                Utf8 charSequence384;
+                Object oldString384 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(384);
+                if (oldString384 instanceof Utf8) {
+                    charSequence384 = (decoder).readString(((Utf8) oldString384));
+                } else {
+                    charSequence384 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, charSequence384);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F384': "+ unionIndex384));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex385 = (decoder.readIndex());
+        if (unionIndex385 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, null);
+        } else {
+            if (unionIndex385 == 1) {
+                Utf8 charSequence385;
+                Object oldString385 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(385);
+                if (oldString385 instanceof Utf8) {
+                    charSequence385 = (decoder).readString(((Utf8) oldString385));
+                } else {
+                    charSequence385 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, charSequence385);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F385': "+ unionIndex385));
+            }
+        }
+        int unionIndex386 = (decoder.readIndex());
+        if (unionIndex386 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, null);
+        } else {
+            if (unionIndex386 == 1) {
+                Utf8 charSequence386;
+                Object oldString386 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(386);
+                if (oldString386 instanceof Utf8) {
+                    charSequence386 = (decoder).readString(((Utf8) oldString386));
+                } else {
+                    charSequence386 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, charSequence386);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F386': "+ unionIndex386));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex387 = (decoder.readIndex());
+        if (unionIndex387 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, null);
+        } else {
+            if (unionIndex387 == 1) {
+                Utf8 charSequence387;
+                Object oldString387 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(387);
+                if (oldString387 instanceof Utf8) {
+                    charSequence387 = (decoder).readString(((Utf8) oldString387));
+                } else {
+                    charSequence387 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, charSequence387);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F387': "+ unionIndex387));
+            }
+        }
+        int unionIndex388 = (decoder.readIndex());
+        if (unionIndex388 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, null);
+        } else {
+            if (unionIndex388 == 1) {
+                Utf8 charSequence388;
+                Object oldString388 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(388);
+                if (oldString388 instanceof Utf8) {
+                    charSequence388 = (decoder).readString(((Utf8) oldString388));
+                } else {
+                    charSequence388 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, charSequence388);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F388': "+ unionIndex388));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex389 = (decoder.readIndex());
+        if (unionIndex389 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, null);
+        } else {
+            if (unionIndex389 == 1) {
+                Utf8 charSequence389;
+                Object oldString389 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(389);
+                if (oldString389 instanceof Utf8) {
+                    charSequence389 = (decoder).readString(((Utf8) oldString389));
+                } else {
+                    charSequence389 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, charSequence389);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F389': "+ unionIndex389));
+            }
+        }
+        int unionIndex390 = (decoder.readIndex());
+        if (unionIndex390 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, null);
+        } else {
+            if (unionIndex390 == 1) {
+                Utf8 charSequence390;
+                Object oldString390 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(390);
+                if (oldString390 instanceof Utf8) {
+                    charSequence390 = (decoder).readString(((Utf8) oldString390));
+                } else {
+                    charSequence390 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, charSequence390);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F390': "+ unionIndex390));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex391 = (decoder.readIndex());
+        if (unionIndex391 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, null);
+        } else {
+            if (unionIndex391 == 1) {
+                Utf8 charSequence391;
+                Object oldString391 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(391);
+                if (oldString391 instanceof Utf8) {
+                    charSequence391 = (decoder).readString(((Utf8) oldString391));
+                } else {
+                    charSequence391 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, charSequence391);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F391': "+ unionIndex391));
+            }
+        }
+        int unionIndex392 = (decoder.readIndex());
+        if (unionIndex392 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, null);
+        } else {
+            if (unionIndex392 == 1) {
+                Utf8 charSequence392;
+                Object oldString392 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(392);
+                if (oldString392 instanceof Utf8) {
+                    charSequence392 = (decoder).readString(((Utf8) oldString392));
+                } else {
+                    charSequence392 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, charSequence392);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F392': "+ unionIndex392));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex393 = (decoder.readIndex());
+        if (unionIndex393 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, null);
+        } else {
+            if (unionIndex393 == 1) {
+                Utf8 charSequence393;
+                Object oldString393 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(393);
+                if (oldString393 instanceof Utf8) {
+                    charSequence393 = (decoder).readString(((Utf8) oldString393));
+                } else {
+                    charSequence393 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, charSequence393);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F393': "+ unionIndex393));
+            }
+        }
+        int unionIndex394 = (decoder.readIndex());
+        if (unionIndex394 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, null);
+        } else {
+            if (unionIndex394 == 1) {
+                Utf8 charSequence394;
+                Object oldString394 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(394);
+                if (oldString394 instanceof Utf8) {
+                    charSequence394 = (decoder).readString(((Utf8) oldString394));
+                } else {
+                    charSequence394 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, charSequence394);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F394': "+ unionIndex394));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex395 = (decoder.readIndex());
+        if (unionIndex395 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, null);
+        } else {
+            if (unionIndex395 == 1) {
+                Utf8 charSequence395;
+                Object oldString395 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(395);
+                if (oldString395 instanceof Utf8) {
+                    charSequence395 = (decoder).readString(((Utf8) oldString395));
+                } else {
+                    charSequence395 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, charSequence395);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F395': "+ unionIndex395));
+            }
+        }
+        int unionIndex396 = (decoder.readIndex());
+        if (unionIndex396 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, null);
+        } else {
+            if (unionIndex396 == 1) {
+                Utf8 charSequence396;
+                Object oldString396 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(396);
+                if (oldString396 instanceof Utf8) {
+                    charSequence396 = (decoder).readString(((Utf8) oldString396));
+                } else {
+                    charSequence396 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, charSequence396);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F396': "+ unionIndex396));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex397 = (decoder.readIndex());
+        if (unionIndex397 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, null);
+        } else {
+            if (unionIndex397 == 1) {
+                Utf8 charSequence397;
+                Object oldString397 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(397);
+                if (oldString397 instanceof Utf8) {
+                    charSequence397 = (decoder).readString(((Utf8) oldString397));
+                } else {
+                    charSequence397 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, charSequence397);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F397': "+ unionIndex397));
+            }
+        }
+        int unionIndex398 = (decoder.readIndex());
+        if (unionIndex398 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, null);
+        } else {
+            if (unionIndex398 == 1) {
+                Utf8 charSequence398;
+                Object oldString398 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(398);
+                if (oldString398 instanceof Utf8) {
+                    charSequence398 = (decoder).readString(((Utf8) oldString398));
+                } else {
+                    charSequence398 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, charSequence398);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F398': "+ unionIndex398));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex399 = (decoder.readIndex());
+        if (unionIndex399 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, null);
+        } else {
+            if (unionIndex399 == 1) {
+                Utf8 charSequence399;
+                Object oldString399 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(399);
+                if (oldString399 instanceof Utf8) {
+                    charSequence399 = (decoder).readString(((Utf8) oldString399));
+                } else {
+                    charSequence399 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, charSequence399);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F399': "+ unionIndex399));
+            }
+        }
+        int unionIndex400 = (decoder.readIndex());
+        if (unionIndex400 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, null);
+        } else {
+            if (unionIndex400 == 1) {
+                Utf8 charSequence400;
+                Object oldString400 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(400);
+                if (oldString400 instanceof Utf8) {
+                    charSequence400 = (decoder).readString(((Utf8) oldString400));
+                } else {
+                    charSequence400 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, charSequence400);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F400': "+ unionIndex400));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex401 = (decoder.readIndex());
+        if (unionIndex401 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, null);
+        } else {
+            if (unionIndex401 == 1) {
+                Utf8 charSequence401;
+                Object oldString401 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(401);
+                if (oldString401 instanceof Utf8) {
+                    charSequence401 = (decoder).readString(((Utf8) oldString401));
+                } else {
+                    charSequence401 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, charSequence401);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F401': "+ unionIndex401));
+            }
+        }
+        int unionIndex402 = (decoder.readIndex());
+        if (unionIndex402 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, null);
+        } else {
+            if (unionIndex402 == 1) {
+                Utf8 charSequence402;
+                Object oldString402 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(402);
+                if (oldString402 instanceof Utf8) {
+                    charSequence402 = (decoder).readString(((Utf8) oldString402));
+                } else {
+                    charSequence402 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, charSequence402);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F402': "+ unionIndex402));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex403 = (decoder.readIndex());
+        if (unionIndex403 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, null);
+        } else {
+            if (unionIndex403 == 1) {
+                Utf8 charSequence403;
+                Object oldString403 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(403);
+                if (oldString403 instanceof Utf8) {
+                    charSequence403 = (decoder).readString(((Utf8) oldString403));
+                } else {
+                    charSequence403 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, charSequence403);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F403': "+ unionIndex403));
+            }
+        }
+        int unionIndex404 = (decoder.readIndex());
+        if (unionIndex404 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, null);
+        } else {
+            if (unionIndex404 == 1) {
+                Utf8 charSequence404;
+                Object oldString404 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(404);
+                if (oldString404 instanceof Utf8) {
+                    charSequence404 = (decoder).readString(((Utf8) oldString404));
+                } else {
+                    charSequence404 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, charSequence404);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F404': "+ unionIndex404));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex405 = (decoder.readIndex());
+        if (unionIndex405 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, null);
+        } else {
+            if (unionIndex405 == 1) {
+                Utf8 charSequence405;
+                Object oldString405 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(405);
+                if (oldString405 instanceof Utf8) {
+                    charSequence405 = (decoder).readString(((Utf8) oldString405));
+                } else {
+                    charSequence405 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, charSequence405);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F405': "+ unionIndex405));
+            }
+        }
+        int unionIndex406 = (decoder.readIndex());
+        if (unionIndex406 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, null);
+        } else {
+            if (unionIndex406 == 1) {
+                Utf8 charSequence406;
+                Object oldString406 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(406);
+                if (oldString406 instanceof Utf8) {
+                    charSequence406 = (decoder).readString(((Utf8) oldString406));
+                } else {
+                    charSequence406 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, charSequence406);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F406': "+ unionIndex406));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex407 = (decoder.readIndex());
+        if (unionIndex407 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, null);
+        } else {
+            if (unionIndex407 == 1) {
+                Utf8 charSequence407;
+                Object oldString407 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(407);
+                if (oldString407 instanceof Utf8) {
+                    charSequence407 = (decoder).readString(((Utf8) oldString407));
+                } else {
+                    charSequence407 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, charSequence407);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F407': "+ unionIndex407));
+            }
+        }
+        int unionIndex408 = (decoder.readIndex());
+        if (unionIndex408 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, null);
+        } else {
+            if (unionIndex408 == 1) {
+                Utf8 charSequence408;
+                Object oldString408 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(408);
+                if (oldString408 instanceof Utf8) {
+                    charSequence408 = (decoder).readString(((Utf8) oldString408));
+                } else {
+                    charSequence408 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, charSequence408);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F408': "+ unionIndex408));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex409 = (decoder.readIndex());
+        if (unionIndex409 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, null);
+        } else {
+            if (unionIndex409 == 1) {
+                Utf8 charSequence409;
+                Object oldString409 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(409);
+                if (oldString409 instanceof Utf8) {
+                    charSequence409 = (decoder).readString(((Utf8) oldString409));
+                } else {
+                    charSequence409 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, charSequence409);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F409': "+ unionIndex409));
+            }
+        }
+        int unionIndex410 = (decoder.readIndex());
+        if (unionIndex410 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, null);
+        } else {
+            if (unionIndex410 == 1) {
+                Utf8 charSequence410;
+                Object oldString410 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(410);
+                if (oldString410 instanceof Utf8) {
+                    charSequence410 = (decoder).readString(((Utf8) oldString410));
+                } else {
+                    charSequence410 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, charSequence410);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F410': "+ unionIndex410));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex411 = (decoder.readIndex());
+        if (unionIndex411 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, null);
+        } else {
+            if (unionIndex411 == 1) {
+                Utf8 charSequence411;
+                Object oldString411 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(411);
+                if (oldString411 instanceof Utf8) {
+                    charSequence411 = (decoder).readString(((Utf8) oldString411));
+                } else {
+                    charSequence411 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, charSequence411);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F411': "+ unionIndex411));
+            }
+        }
+        int unionIndex412 = (decoder.readIndex());
+        if (unionIndex412 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, null);
+        } else {
+            if (unionIndex412 == 1) {
+                Utf8 charSequence412;
+                Object oldString412 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(412);
+                if (oldString412 instanceof Utf8) {
+                    charSequence412 = (decoder).readString(((Utf8) oldString412));
+                } else {
+                    charSequence412 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, charSequence412);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F412': "+ unionIndex412));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex413 = (decoder.readIndex());
+        if (unionIndex413 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, null);
+        } else {
+            if (unionIndex413 == 1) {
+                Utf8 charSequence413;
+                Object oldString413 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(413);
+                if (oldString413 instanceof Utf8) {
+                    charSequence413 = (decoder).readString(((Utf8) oldString413));
+                } else {
+                    charSequence413 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, charSequence413);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F413': "+ unionIndex413));
+            }
+        }
+        int unionIndex414 = (decoder.readIndex());
+        if (unionIndex414 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, null);
+        } else {
+            if (unionIndex414 == 1) {
+                Utf8 charSequence414;
+                Object oldString414 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(414);
+                if (oldString414 instanceof Utf8) {
+                    charSequence414 = (decoder).readString(((Utf8) oldString414));
+                } else {
+                    charSequence414 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, charSequence414);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F414': "+ unionIndex414));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex415 = (decoder.readIndex());
+        if (unionIndex415 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, null);
+        } else {
+            if (unionIndex415 == 1) {
+                Utf8 charSequence415;
+                Object oldString415 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(415);
+                if (oldString415 instanceof Utf8) {
+                    charSequence415 = (decoder).readString(((Utf8) oldString415));
+                } else {
+                    charSequence415 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, charSequence415);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F415': "+ unionIndex415));
+            }
+        }
+        int unionIndex416 = (decoder.readIndex());
+        if (unionIndex416 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, null);
+        } else {
+            if (unionIndex416 == 1) {
+                Utf8 charSequence416;
+                Object oldString416 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(416);
+                if (oldString416 instanceof Utf8) {
+                    charSequence416 = (decoder).readString(((Utf8) oldString416));
+                } else {
+                    charSequence416 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, charSequence416);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F416': "+ unionIndex416));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex417 = (decoder.readIndex());
+        if (unionIndex417 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, null);
+        } else {
+            if (unionIndex417 == 1) {
+                Utf8 charSequence417;
+                Object oldString417 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(417);
+                if (oldString417 instanceof Utf8) {
+                    charSequence417 = (decoder).readString(((Utf8) oldString417));
+                } else {
+                    charSequence417 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, charSequence417);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F417': "+ unionIndex417));
+            }
+        }
+        int unionIndex418 = (decoder.readIndex());
+        if (unionIndex418 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, null);
+        } else {
+            if (unionIndex418 == 1) {
+                Utf8 charSequence418;
+                Object oldString418 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(418);
+                if (oldString418 instanceof Utf8) {
+                    charSequence418 = (decoder).readString(((Utf8) oldString418));
+                } else {
+                    charSequence418 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, charSequence418);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F418': "+ unionIndex418));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex419 = (decoder.readIndex());
+        if (unionIndex419 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, null);
+        } else {
+            if (unionIndex419 == 1) {
+                Utf8 charSequence419;
+                Object oldString419 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(419);
+                if (oldString419 instanceof Utf8) {
+                    charSequence419 = (decoder).readString(((Utf8) oldString419));
+                } else {
+                    charSequence419 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, charSequence419);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F419': "+ unionIndex419));
+            }
+        }
+        int unionIndex420 = (decoder.readIndex());
+        if (unionIndex420 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, null);
+        } else {
+            if (unionIndex420 == 1) {
+                Utf8 charSequence420;
+                Object oldString420 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(420);
+                if (oldString420 instanceof Utf8) {
+                    charSequence420 = (decoder).readString(((Utf8) oldString420));
+                } else {
+                    charSequence420 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, charSequence420);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F420': "+ unionIndex420));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex421 = (decoder.readIndex());
+        if (unionIndex421 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, null);
+        } else {
+            if (unionIndex421 == 1) {
+                Utf8 charSequence421;
+                Object oldString421 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(421);
+                if (oldString421 instanceof Utf8) {
+                    charSequence421 = (decoder).readString(((Utf8) oldString421));
+                } else {
+                    charSequence421 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, charSequence421);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F421': "+ unionIndex421));
+            }
+        }
+        int unionIndex422 = (decoder.readIndex());
+        if (unionIndex422 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, null);
+        } else {
+            if (unionIndex422 == 1) {
+                Utf8 charSequence422;
+                Object oldString422 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(422);
+                if (oldString422 instanceof Utf8) {
+                    charSequence422 = (decoder).readString(((Utf8) oldString422));
+                } else {
+                    charSequence422 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, charSequence422);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F422': "+ unionIndex422));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex423 = (decoder.readIndex());
+        if (unionIndex423 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, null);
+        } else {
+            if (unionIndex423 == 1) {
+                Utf8 charSequence423;
+                Object oldString423 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(423);
+                if (oldString423 instanceof Utf8) {
+                    charSequence423 = (decoder).readString(((Utf8) oldString423));
+                } else {
+                    charSequence423 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, charSequence423);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F423': "+ unionIndex423));
+            }
+        }
+        int unionIndex424 = (decoder.readIndex());
+        if (unionIndex424 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, null);
+        } else {
+            if (unionIndex424 == 1) {
+                Utf8 charSequence424;
+                Object oldString424 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(424);
+                if (oldString424 instanceof Utf8) {
+                    charSequence424 = (decoder).readString(((Utf8) oldString424));
+                } else {
+                    charSequence424 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, charSequence424);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F424': "+ unionIndex424));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex425 = (decoder.readIndex());
+        if (unionIndex425 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, null);
+        } else {
+            if (unionIndex425 == 1) {
+                Utf8 charSequence425;
+                Object oldString425 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(425);
+                if (oldString425 instanceof Utf8) {
+                    charSequence425 = (decoder).readString(((Utf8) oldString425));
+                } else {
+                    charSequence425 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, charSequence425);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F425': "+ unionIndex425));
+            }
+        }
+        int unionIndex426 = (decoder.readIndex());
+        if (unionIndex426 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, null);
+        } else {
+            if (unionIndex426 == 1) {
+                Utf8 charSequence426;
+                Object oldString426 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(426);
+                if (oldString426 instanceof Utf8) {
+                    charSequence426 = (decoder).readString(((Utf8) oldString426));
+                } else {
+                    charSequence426 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, charSequence426);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F426': "+ unionIndex426));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex427 = (decoder.readIndex());
+        if (unionIndex427 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, null);
+        } else {
+            if (unionIndex427 == 1) {
+                Utf8 charSequence427;
+                Object oldString427 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(427);
+                if (oldString427 instanceof Utf8) {
+                    charSequence427 = (decoder).readString(((Utf8) oldString427));
+                } else {
+                    charSequence427 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, charSequence427);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F427': "+ unionIndex427));
+            }
+        }
+        int unionIndex428 = (decoder.readIndex());
+        if (unionIndex428 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, null);
+        } else {
+            if (unionIndex428 == 1) {
+                Utf8 charSequence428;
+                Object oldString428 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(428);
+                if (oldString428 instanceof Utf8) {
+                    charSequence428 = (decoder).readString(((Utf8) oldString428));
+                } else {
+                    charSequence428 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, charSequence428);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F428': "+ unionIndex428));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex429 = (decoder.readIndex());
+        if (unionIndex429 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, null);
+        } else {
+            if (unionIndex429 == 1) {
+                Utf8 charSequence429;
+                Object oldString429 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(429);
+                if (oldString429 instanceof Utf8) {
+                    charSequence429 = (decoder).readString(((Utf8) oldString429));
+                } else {
+                    charSequence429 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, charSequence429);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F429': "+ unionIndex429));
+            }
+        }
+        int unionIndex430 = (decoder.readIndex());
+        if (unionIndex430 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, null);
+        } else {
+            if (unionIndex430 == 1) {
+                Utf8 charSequence430;
+                Object oldString430 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(430);
+                if (oldString430 instanceof Utf8) {
+                    charSequence430 = (decoder).readString(((Utf8) oldString430));
+                } else {
+                    charSequence430 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, charSequence430);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F430': "+ unionIndex430));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex431 = (decoder.readIndex());
+        if (unionIndex431 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, null);
+        } else {
+            if (unionIndex431 == 1) {
+                Utf8 charSequence431;
+                Object oldString431 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(431);
+                if (oldString431 instanceof Utf8) {
+                    charSequence431 = (decoder).readString(((Utf8) oldString431));
+                } else {
+                    charSequence431 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, charSequence431);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F431': "+ unionIndex431));
+            }
+        }
+        int unionIndex432 = (decoder.readIndex());
+        if (unionIndex432 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, null);
+        } else {
+            if (unionIndex432 == 1) {
+                Utf8 charSequence432;
+                Object oldString432 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(432);
+                if (oldString432 instanceof Utf8) {
+                    charSequence432 = (decoder).readString(((Utf8) oldString432));
+                } else {
+                    charSequence432 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, charSequence432);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F432': "+ unionIndex432));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex433 = (decoder.readIndex());
+        if (unionIndex433 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, null);
+        } else {
+            if (unionIndex433 == 1) {
+                Utf8 charSequence433;
+                Object oldString433 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(433);
+                if (oldString433 instanceof Utf8) {
+                    charSequence433 = (decoder).readString(((Utf8) oldString433));
+                } else {
+                    charSequence433 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, charSequence433);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F433': "+ unionIndex433));
+            }
+        }
+        int unionIndex434 = (decoder.readIndex());
+        if (unionIndex434 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, null);
+        } else {
+            if (unionIndex434 == 1) {
+                Utf8 charSequence434;
+                Object oldString434 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(434);
+                if (oldString434 instanceof Utf8) {
+                    charSequence434 = (decoder).readString(((Utf8) oldString434));
+                } else {
+                    charSequence434 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, charSequence434);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F434': "+ unionIndex434));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex435 = (decoder.readIndex());
+        if (unionIndex435 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, null);
+        } else {
+            if (unionIndex435 == 1) {
+                Utf8 charSequence435;
+                Object oldString435 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(435);
+                if (oldString435 instanceof Utf8) {
+                    charSequence435 = (decoder).readString(((Utf8) oldString435));
+                } else {
+                    charSequence435 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, charSequence435);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F435': "+ unionIndex435));
+            }
+        }
+        int unionIndex436 = (decoder.readIndex());
+        if (unionIndex436 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, null);
+        } else {
+            if (unionIndex436 == 1) {
+                Utf8 charSequence436;
+                Object oldString436 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(436);
+                if (oldString436 instanceof Utf8) {
+                    charSequence436 = (decoder).readString(((Utf8) oldString436));
+                } else {
+                    charSequence436 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, charSequence436);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F436': "+ unionIndex436));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex437 = (decoder.readIndex());
+        if (unionIndex437 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, null);
+        } else {
+            if (unionIndex437 == 1) {
+                Utf8 charSequence437;
+                Object oldString437 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(437);
+                if (oldString437 instanceof Utf8) {
+                    charSequence437 = (decoder).readString(((Utf8) oldString437));
+                } else {
+                    charSequence437 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, charSequence437);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F437': "+ unionIndex437));
+            }
+        }
+        int unionIndex438 = (decoder.readIndex());
+        if (unionIndex438 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, null);
+        } else {
+            if (unionIndex438 == 1) {
+                Utf8 charSequence438;
+                Object oldString438 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(438);
+                if (oldString438 instanceof Utf8) {
+                    charSequence438 = (decoder).readString(((Utf8) oldString438));
+                } else {
+                    charSequence438 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, charSequence438);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F438': "+ unionIndex438));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex439 = (decoder.readIndex());
+        if (unionIndex439 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, null);
+        } else {
+            if (unionIndex439 == 1) {
+                Utf8 charSequence439;
+                Object oldString439 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(439);
+                if (oldString439 instanceof Utf8) {
+                    charSequence439 = (decoder).readString(((Utf8) oldString439));
+                } else {
+                    charSequence439 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, charSequence439);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F439': "+ unionIndex439));
+            }
+        }
+        int unionIndex440 = (decoder.readIndex());
+        if (unionIndex440 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, null);
+        } else {
+            if (unionIndex440 == 1) {
+                Utf8 charSequence440;
+                Object oldString440 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(440);
+                if (oldString440 instanceof Utf8) {
+                    charSequence440 = (decoder).readString(((Utf8) oldString440));
+                } else {
+                    charSequence440 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, charSequence440);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F440': "+ unionIndex440));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex441 = (decoder.readIndex());
+        if (unionIndex441 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, null);
+        } else {
+            if (unionIndex441 == 1) {
+                Utf8 charSequence441;
+                Object oldString441 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(441);
+                if (oldString441 instanceof Utf8) {
+                    charSequence441 = (decoder).readString(((Utf8) oldString441));
+                } else {
+                    charSequence441 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, charSequence441);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F441': "+ unionIndex441));
+            }
+        }
+        int unionIndex442 = (decoder.readIndex());
+        if (unionIndex442 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, null);
+        } else {
+            if (unionIndex442 == 1) {
+                Utf8 charSequence442;
+                Object oldString442 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(442);
+                if (oldString442 instanceof Utf8) {
+                    charSequence442 = (decoder).readString(((Utf8) oldString442));
+                } else {
+                    charSequence442 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, charSequence442);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F442': "+ unionIndex442));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex443 = (decoder.readIndex());
+        if (unionIndex443 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, null);
+        } else {
+            if (unionIndex443 == 1) {
+                Utf8 charSequence443;
+                Object oldString443 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(443);
+                if (oldString443 instanceof Utf8) {
+                    charSequence443 = (decoder).readString(((Utf8) oldString443));
+                } else {
+                    charSequence443 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, charSequence443);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F443': "+ unionIndex443));
+            }
+        }
+        int unionIndex444 = (decoder.readIndex());
+        if (unionIndex444 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, null);
+        } else {
+            if (unionIndex444 == 1) {
+                Utf8 charSequence444;
+                Object oldString444 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(444);
+                if (oldString444 instanceof Utf8) {
+                    charSequence444 = (decoder).readString(((Utf8) oldString444));
+                } else {
+                    charSequence444 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, charSequence444);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F444': "+ unionIndex444));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex445 = (decoder.readIndex());
+        if (unionIndex445 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, null);
+        } else {
+            if (unionIndex445 == 1) {
+                Utf8 charSequence445;
+                Object oldString445 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(445);
+                if (oldString445 instanceof Utf8) {
+                    charSequence445 = (decoder).readString(((Utf8) oldString445));
+                } else {
+                    charSequence445 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, charSequence445);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F445': "+ unionIndex445));
+            }
+        }
+        int unionIndex446 = (decoder.readIndex());
+        if (unionIndex446 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, null);
+        } else {
+            if (unionIndex446 == 1) {
+                Utf8 charSequence446;
+                Object oldString446 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(446);
+                if (oldString446 instanceof Utf8) {
+                    charSequence446 = (decoder).readString(((Utf8) oldString446));
+                } else {
+                    charSequence446 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, charSequence446);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F446': "+ unionIndex446));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex447 = (decoder.readIndex());
+        if (unionIndex447 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, null);
+        } else {
+            if (unionIndex447 == 1) {
+                Utf8 charSequence447;
+                Object oldString447 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(447);
+                if (oldString447 instanceof Utf8) {
+                    charSequence447 = (decoder).readString(((Utf8) oldString447));
+                } else {
+                    charSequence447 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, charSequence447);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F447': "+ unionIndex447));
+            }
+        }
+        int unionIndex448 = (decoder.readIndex());
+        if (unionIndex448 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, null);
+        } else {
+            if (unionIndex448 == 1) {
+                Utf8 charSequence448;
+                Object oldString448 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(448);
+                if (oldString448 instanceof Utf8) {
+                    charSequence448 = (decoder).readString(((Utf8) oldString448));
+                } else {
+                    charSequence448 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, charSequence448);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F448': "+ unionIndex448));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex449 = (decoder.readIndex());
+        if (unionIndex449 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, null);
+        } else {
+            if (unionIndex449 == 1) {
+                Utf8 charSequence449;
+                Object oldString449 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(449);
+                if (oldString449 instanceof Utf8) {
+                    charSequence449 = (decoder).readString(((Utf8) oldString449));
+                } else {
+                    charSequence449 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, charSequence449);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F449': "+ unionIndex449));
+            }
+        }
+        int unionIndex450 = (decoder.readIndex());
+        if (unionIndex450 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, null);
+        } else {
+            if (unionIndex450 == 1) {
+                Utf8 charSequence450;
+                Object oldString450 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(450);
+                if (oldString450 instanceof Utf8) {
+                    charSequence450 = (decoder).readString(((Utf8) oldString450));
+                } else {
+                    charSequence450 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, charSequence450);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F450': "+ unionIndex450));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex451 = (decoder.readIndex());
+        if (unionIndex451 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, null);
+        } else {
+            if (unionIndex451 == 1) {
+                Utf8 charSequence451;
+                Object oldString451 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(451);
+                if (oldString451 instanceof Utf8) {
+                    charSequence451 = (decoder).readString(((Utf8) oldString451));
+                } else {
+                    charSequence451 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, charSequence451);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F451': "+ unionIndex451));
+            }
+        }
+        int unionIndex452 = (decoder.readIndex());
+        if (unionIndex452 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, null);
+        } else {
+            if (unionIndex452 == 1) {
+                Utf8 charSequence452;
+                Object oldString452 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(452);
+                if (oldString452 instanceof Utf8) {
+                    charSequence452 = (decoder).readString(((Utf8) oldString452));
+                } else {
+                    charSequence452 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, charSequence452);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F452': "+ unionIndex452));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex453 = (decoder.readIndex());
+        if (unionIndex453 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, null);
+        } else {
+            if (unionIndex453 == 1) {
+                Utf8 charSequence453;
+                Object oldString453 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(453);
+                if (oldString453 instanceof Utf8) {
+                    charSequence453 = (decoder).readString(((Utf8) oldString453));
+                } else {
+                    charSequence453 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, charSequence453);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F453': "+ unionIndex453));
+            }
+        }
+        int unionIndex454 = (decoder.readIndex());
+        if (unionIndex454 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, null);
+        } else {
+            if (unionIndex454 == 1) {
+                Utf8 charSequence454;
+                Object oldString454 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(454);
+                if (oldString454 instanceof Utf8) {
+                    charSequence454 = (decoder).readString(((Utf8) oldString454));
+                } else {
+                    charSequence454 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, charSequence454);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F454': "+ unionIndex454));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex455 = (decoder.readIndex());
+        if (unionIndex455 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, null);
+        } else {
+            if (unionIndex455 == 1) {
+                Utf8 charSequence455;
+                Object oldString455 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(455);
+                if (oldString455 instanceof Utf8) {
+                    charSequence455 = (decoder).readString(((Utf8) oldString455));
+                } else {
+                    charSequence455 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, charSequence455);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F455': "+ unionIndex455));
+            }
+        }
+        int unionIndex456 = (decoder.readIndex());
+        if (unionIndex456 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, null);
+        } else {
+            if (unionIndex456 == 1) {
+                Utf8 charSequence456;
+                Object oldString456 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(456);
+                if (oldString456 instanceof Utf8) {
+                    charSequence456 = (decoder).readString(((Utf8) oldString456));
+                } else {
+                    charSequence456 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, charSequence456);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F456': "+ unionIndex456));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex457 = (decoder.readIndex());
+        if (unionIndex457 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, null);
+        } else {
+            if (unionIndex457 == 1) {
+                Utf8 charSequence457;
+                Object oldString457 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(457);
+                if (oldString457 instanceof Utf8) {
+                    charSequence457 = (decoder).readString(((Utf8) oldString457));
+                } else {
+                    charSequence457 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, charSequence457);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F457': "+ unionIndex457));
+            }
+        }
+        int unionIndex458 = (decoder.readIndex());
+        if (unionIndex458 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, null);
+        } else {
+            if (unionIndex458 == 1) {
+                Utf8 charSequence458;
+                Object oldString458 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(458);
+                if (oldString458 instanceof Utf8) {
+                    charSequence458 = (decoder).readString(((Utf8) oldString458));
+                } else {
+                    charSequence458 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, charSequence458);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F458': "+ unionIndex458));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex459 = (decoder.readIndex());
+        if (unionIndex459 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, null);
+        } else {
+            if (unionIndex459 == 1) {
+                Utf8 charSequence459;
+                Object oldString459 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(459);
+                if (oldString459 instanceof Utf8) {
+                    charSequence459 = (decoder).readString(((Utf8) oldString459));
+                } else {
+                    charSequence459 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, charSequence459);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F459': "+ unionIndex459));
+            }
+        }
+        int unionIndex460 = (decoder.readIndex());
+        if (unionIndex460 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, null);
+        } else {
+            if (unionIndex460 == 1) {
+                Utf8 charSequence460;
+                Object oldString460 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(460);
+                if (oldString460 instanceof Utf8) {
+                    charSequence460 = (decoder).readString(((Utf8) oldString460));
+                } else {
+                    charSequence460 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, charSequence460);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F460': "+ unionIndex460));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex461 = (decoder.readIndex());
+        if (unionIndex461 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, null);
+        } else {
+            if (unionIndex461 == 1) {
+                Utf8 charSequence461;
+                Object oldString461 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(461);
+                if (oldString461 instanceof Utf8) {
+                    charSequence461 = (decoder).readString(((Utf8) oldString461));
+                } else {
+                    charSequence461 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, charSequence461);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F461': "+ unionIndex461));
+            }
+        }
+        int unionIndex462 = (decoder.readIndex());
+        if (unionIndex462 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, null);
+        } else {
+            if (unionIndex462 == 1) {
+                Utf8 charSequence462;
+                Object oldString462 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(462);
+                if (oldString462 instanceof Utf8) {
+                    charSequence462 = (decoder).readString(((Utf8) oldString462));
+                } else {
+                    charSequence462 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, charSequence462);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F462': "+ unionIndex462));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex463 = (decoder.readIndex());
+        if (unionIndex463 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, null);
+        } else {
+            if (unionIndex463 == 1) {
+                Utf8 charSequence463;
+                Object oldString463 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(463);
+                if (oldString463 instanceof Utf8) {
+                    charSequence463 = (decoder).readString(((Utf8) oldString463));
+                } else {
+                    charSequence463 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, charSequence463);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F463': "+ unionIndex463));
+            }
+        }
+        int unionIndex464 = (decoder.readIndex());
+        if (unionIndex464 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, null);
+        } else {
+            if (unionIndex464 == 1) {
+                Utf8 charSequence464;
+                Object oldString464 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(464);
+                if (oldString464 instanceof Utf8) {
+                    charSequence464 = (decoder).readString(((Utf8) oldString464));
+                } else {
+                    charSequence464 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, charSequence464);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F464': "+ unionIndex464));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex465 = (decoder.readIndex());
+        if (unionIndex465 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, null);
+        } else {
+            if (unionIndex465 == 1) {
+                Utf8 charSequence465;
+                Object oldString465 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(465);
+                if (oldString465 instanceof Utf8) {
+                    charSequence465 = (decoder).readString(((Utf8) oldString465));
+                } else {
+                    charSequence465 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, charSequence465);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F465': "+ unionIndex465));
+            }
+        }
+        int unionIndex466 = (decoder.readIndex());
+        if (unionIndex466 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, null);
+        } else {
+            if (unionIndex466 == 1) {
+                Utf8 charSequence466;
+                Object oldString466 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(466);
+                if (oldString466 instanceof Utf8) {
+                    charSequence466 = (decoder).readString(((Utf8) oldString466));
+                } else {
+                    charSequence466 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, charSequence466);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F466': "+ unionIndex466));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex467 = (decoder.readIndex());
+        if (unionIndex467 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, null);
+        } else {
+            if (unionIndex467 == 1) {
+                Utf8 charSequence467;
+                Object oldString467 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(467);
+                if (oldString467 instanceof Utf8) {
+                    charSequence467 = (decoder).readString(((Utf8) oldString467));
+                } else {
+                    charSequence467 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, charSequence467);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F467': "+ unionIndex467));
+            }
+        }
+        int unionIndex468 = (decoder.readIndex());
+        if (unionIndex468 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, null);
+        } else {
+            if (unionIndex468 == 1) {
+                Utf8 charSequence468;
+                Object oldString468 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(468);
+                if (oldString468 instanceof Utf8) {
+                    charSequence468 = (decoder).readString(((Utf8) oldString468));
+                } else {
+                    charSequence468 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, charSequence468);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F468': "+ unionIndex468));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex469 = (decoder.readIndex());
+        if (unionIndex469 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, null);
+        } else {
+            if (unionIndex469 == 1) {
+                Utf8 charSequence469;
+                Object oldString469 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(469);
+                if (oldString469 instanceof Utf8) {
+                    charSequence469 = (decoder).readString(((Utf8) oldString469));
+                } else {
+                    charSequence469 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, charSequence469);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F469': "+ unionIndex469));
+            }
+        }
+        int unionIndex470 = (decoder.readIndex());
+        if (unionIndex470 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, null);
+        } else {
+            if (unionIndex470 == 1) {
+                Utf8 charSequence470;
+                Object oldString470 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(470);
+                if (oldString470 instanceof Utf8) {
+                    charSequence470 = (decoder).readString(((Utf8) oldString470));
+                } else {
+                    charSequence470 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, charSequence470);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F470': "+ unionIndex470));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex471 = (decoder.readIndex());
+        if (unionIndex471 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, null);
+        } else {
+            if (unionIndex471 == 1) {
+                Utf8 charSequence471;
+                Object oldString471 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(471);
+                if (oldString471 instanceof Utf8) {
+                    charSequence471 = (decoder).readString(((Utf8) oldString471));
+                } else {
+                    charSequence471 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, charSequence471);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F471': "+ unionIndex471));
+            }
+        }
+        int unionIndex472 = (decoder.readIndex());
+        if (unionIndex472 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, null);
+        } else {
+            if (unionIndex472 == 1) {
+                Utf8 charSequence472;
+                Object oldString472 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(472);
+                if (oldString472 instanceof Utf8) {
+                    charSequence472 = (decoder).readString(((Utf8) oldString472));
+                } else {
+                    charSequence472 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, charSequence472);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F472': "+ unionIndex472));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex473 = (decoder.readIndex());
+        if (unionIndex473 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, null);
+        } else {
+            if (unionIndex473 == 1) {
+                Utf8 charSequence473;
+                Object oldString473 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(473);
+                if (oldString473 instanceof Utf8) {
+                    charSequence473 = (decoder).readString(((Utf8) oldString473));
+                } else {
+                    charSequence473 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, charSequence473);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F473': "+ unionIndex473));
+            }
+        }
+        int unionIndex474 = (decoder.readIndex());
+        if (unionIndex474 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, null);
+        } else {
+            if (unionIndex474 == 1) {
+                Utf8 charSequence474;
+                Object oldString474 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(474);
+                if (oldString474 instanceof Utf8) {
+                    charSequence474 = (decoder).readString(((Utf8) oldString474));
+                } else {
+                    charSequence474 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, charSequence474);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F474': "+ unionIndex474));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex475 = (decoder.readIndex());
+        if (unionIndex475 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, null);
+        } else {
+            if (unionIndex475 == 1) {
+                Utf8 charSequence475;
+                Object oldString475 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(475);
+                if (oldString475 instanceof Utf8) {
+                    charSequence475 = (decoder).readString(((Utf8) oldString475));
+                } else {
+                    charSequence475 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, charSequence475);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F475': "+ unionIndex475));
+            }
+        }
+        int unionIndex476 = (decoder.readIndex());
+        if (unionIndex476 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, null);
+        } else {
+            if (unionIndex476 == 1) {
+                Utf8 charSequence476;
+                Object oldString476 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(476);
+                if (oldString476 instanceof Utf8) {
+                    charSequence476 = (decoder).readString(((Utf8) oldString476));
+                } else {
+                    charSequence476 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, charSequence476);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F476': "+ unionIndex476));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex477 = (decoder.readIndex());
+        if (unionIndex477 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, null);
+        } else {
+            if (unionIndex477 == 1) {
+                Utf8 charSequence477;
+                Object oldString477 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(477);
+                if (oldString477 instanceof Utf8) {
+                    charSequence477 = (decoder).readString(((Utf8) oldString477));
+                } else {
+                    charSequence477 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, charSequence477);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F477': "+ unionIndex477));
+            }
+        }
+        int unionIndex478 = (decoder.readIndex());
+        if (unionIndex478 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, null);
+        } else {
+            if (unionIndex478 == 1) {
+                Utf8 charSequence478;
+                Object oldString478 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(478);
+                if (oldString478 instanceof Utf8) {
+                    charSequence478 = (decoder).readString(((Utf8) oldString478));
+                } else {
+                    charSequence478 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, charSequence478);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F478': "+ unionIndex478));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex479 = (decoder.readIndex());
+        if (unionIndex479 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, null);
+        } else {
+            if (unionIndex479 == 1) {
+                Utf8 charSequence479;
+                Object oldString479 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(479);
+                if (oldString479 instanceof Utf8) {
+                    charSequence479 = (decoder).readString(((Utf8) oldString479));
+                } else {
+                    charSequence479 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, charSequence479);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F479': "+ unionIndex479));
+            }
+        }
+        int unionIndex480 = (decoder.readIndex());
+        if (unionIndex480 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, null);
+        } else {
+            if (unionIndex480 == 1) {
+                Utf8 charSequence480;
+                Object oldString480 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(480);
+                if (oldString480 instanceof Utf8) {
+                    charSequence480 = (decoder).readString(((Utf8) oldString480));
+                } else {
+                    charSequence480 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, charSequence480);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F480': "+ unionIndex480));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex481 = (decoder.readIndex());
+        if (unionIndex481 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, null);
+        } else {
+            if (unionIndex481 == 1) {
+                Utf8 charSequence481;
+                Object oldString481 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(481);
+                if (oldString481 instanceof Utf8) {
+                    charSequence481 = (decoder).readString(((Utf8) oldString481));
+                } else {
+                    charSequence481 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, charSequence481);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F481': "+ unionIndex481));
+            }
+        }
+        int unionIndex482 = (decoder.readIndex());
+        if (unionIndex482 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, null);
+        } else {
+            if (unionIndex482 == 1) {
+                Utf8 charSequence482;
+                Object oldString482 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(482);
+                if (oldString482 instanceof Utf8) {
+                    charSequence482 = (decoder).readString(((Utf8) oldString482));
+                } else {
+                    charSequence482 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, charSequence482);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F482': "+ unionIndex482));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex483 = (decoder.readIndex());
+        if (unionIndex483 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, null);
+        } else {
+            if (unionIndex483 == 1) {
+                Utf8 charSequence483;
+                Object oldString483 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(483);
+                if (oldString483 instanceof Utf8) {
+                    charSequence483 = (decoder).readString(((Utf8) oldString483));
+                } else {
+                    charSequence483 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, charSequence483);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F483': "+ unionIndex483));
+            }
+        }
+        int unionIndex484 = (decoder.readIndex());
+        if (unionIndex484 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, null);
+        } else {
+            if (unionIndex484 == 1) {
+                Utf8 charSequence484;
+                Object oldString484 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(484);
+                if (oldString484 instanceof Utf8) {
+                    charSequence484 = (decoder).readString(((Utf8) oldString484));
+                } else {
+                    charSequence484 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, charSequence484);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F484': "+ unionIndex484));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex485 = (decoder.readIndex());
+        if (unionIndex485 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, null);
+        } else {
+            if (unionIndex485 == 1) {
+                Utf8 charSequence485;
+                Object oldString485 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(485);
+                if (oldString485 instanceof Utf8) {
+                    charSequence485 = (decoder).readString(((Utf8) oldString485));
+                } else {
+                    charSequence485 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, charSequence485);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F485': "+ unionIndex485));
+            }
+        }
+        int unionIndex486 = (decoder.readIndex());
+        if (unionIndex486 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, null);
+        } else {
+            if (unionIndex486 == 1) {
+                Utf8 charSequence486;
+                Object oldString486 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(486);
+                if (oldString486 instanceof Utf8) {
+                    charSequence486 = (decoder).readString(((Utf8) oldString486));
+                } else {
+                    charSequence486 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, charSequence486);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F486': "+ unionIndex486));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex487 = (decoder.readIndex());
+        if (unionIndex487 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, null);
+        } else {
+            if (unionIndex487 == 1) {
+                Utf8 charSequence487;
+                Object oldString487 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(487);
+                if (oldString487 instanceof Utf8) {
+                    charSequence487 = (decoder).readString(((Utf8) oldString487));
+                } else {
+                    charSequence487 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, charSequence487);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F487': "+ unionIndex487));
+            }
+        }
+        int unionIndex488 = (decoder.readIndex());
+        if (unionIndex488 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, null);
+        } else {
+            if (unionIndex488 == 1) {
+                Utf8 charSequence488;
+                Object oldString488 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(488);
+                if (oldString488 instanceof Utf8) {
+                    charSequence488 = (decoder).readString(((Utf8) oldString488));
+                } else {
+                    charSequence488 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, charSequence488);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F488': "+ unionIndex488));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex489 = (decoder.readIndex());
+        if (unionIndex489 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, null);
+        } else {
+            if (unionIndex489 == 1) {
+                Utf8 charSequence489;
+                Object oldString489 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(489);
+                if (oldString489 instanceof Utf8) {
+                    charSequence489 = (decoder).readString(((Utf8) oldString489));
+                } else {
+                    charSequence489 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, charSequence489);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F489': "+ unionIndex489));
+            }
+        }
+        int unionIndex490 = (decoder.readIndex());
+        if (unionIndex490 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, null);
+        } else {
+            if (unionIndex490 == 1) {
+                Utf8 charSequence490;
+                Object oldString490 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(490);
+                if (oldString490 instanceof Utf8) {
+                    charSequence490 = (decoder).readString(((Utf8) oldString490));
+                } else {
+                    charSequence490 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, charSequence490);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F490': "+ unionIndex490));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex491 = (decoder.readIndex());
+        if (unionIndex491 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, null);
+        } else {
+            if (unionIndex491 == 1) {
+                Utf8 charSequence491;
+                Object oldString491 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(491);
+                if (oldString491 instanceof Utf8) {
+                    charSequence491 = (decoder).readString(((Utf8) oldString491));
+                } else {
+                    charSequence491 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, charSequence491);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F491': "+ unionIndex491));
+            }
+        }
+        int unionIndex492 = (decoder.readIndex());
+        if (unionIndex492 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, null);
+        } else {
+            if (unionIndex492 == 1) {
+                Utf8 charSequence492;
+                Object oldString492 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(492);
+                if (oldString492 instanceof Utf8) {
+                    charSequence492 = (decoder).readString(((Utf8) oldString492));
+                } else {
+                    charSequence492 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, charSequence492);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F492': "+ unionIndex492));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex493 = (decoder.readIndex());
+        if (unionIndex493 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, null);
+        } else {
+            if (unionIndex493 == 1) {
+                Utf8 charSequence493;
+                Object oldString493 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(493);
+                if (oldString493 instanceof Utf8) {
+                    charSequence493 = (decoder).readString(((Utf8) oldString493));
+                } else {
+                    charSequence493 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, charSequence493);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F493': "+ unionIndex493));
+            }
+        }
+        int unionIndex494 = (decoder.readIndex());
+        if (unionIndex494 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, null);
+        } else {
+            if (unionIndex494 == 1) {
+                Utf8 charSequence494;
+                Object oldString494 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(494);
+                if (oldString494 instanceof Utf8) {
+                    charSequence494 = (decoder).readString(((Utf8) oldString494));
+                } else {
+                    charSequence494 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, charSequence494);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F494': "+ unionIndex494));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex495 = (decoder.readIndex());
+        if (unionIndex495 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, null);
+        } else {
+            if (unionIndex495 == 1) {
+                Utf8 charSequence495;
+                Object oldString495 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(495);
+                if (oldString495 instanceof Utf8) {
+                    charSequence495 = (decoder).readString(((Utf8) oldString495));
+                } else {
+                    charSequence495 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, charSequence495);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F495': "+ unionIndex495));
+            }
+        }
+        int unionIndex496 = (decoder.readIndex());
+        if (unionIndex496 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, null);
+        } else {
+            if (unionIndex496 == 1) {
+                Utf8 charSequence496;
+                Object oldString496 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(496);
+                if (oldString496 instanceof Utf8) {
+                    charSequence496 = (decoder).readString(((Utf8) oldString496));
+                } else {
+                    charSequence496 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, charSequence496);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F496': "+ unionIndex496));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex497 = (decoder.readIndex());
+        if (unionIndex497 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, null);
+        } else {
+            if (unionIndex497 == 1) {
+                Utf8 charSequence497;
+                Object oldString497 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(497);
+                if (oldString497 instanceof Utf8) {
+                    charSequence497 = (decoder).readString(((Utf8) oldString497));
+                } else {
+                    charSequence497 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, charSequence497);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F497': "+ unionIndex497));
+            }
+        }
+        int unionIndex498 = (decoder.readIndex());
+        if (unionIndex498 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, null);
+        } else {
+            if (unionIndex498 == 1) {
+                Utf8 charSequence498;
+                Object oldString498 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(498);
+                if (oldString498 instanceof Utf8) {
+                    charSequence498 = (decoder).readString(((Utf8) oldString498));
+                } else {
+                    charSequence498 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, charSequence498);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F498': "+ unionIndex498));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex499 = (decoder.readIndex());
+        if (unionIndex499 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, null);
+        } else {
+            if (unionIndex499 == 1) {
+                Utf8 charSequence499;
+                Object oldString499 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(499);
+                if (oldString499 instanceof Utf8) {
+                    charSequence499 = (decoder).readString(((Utf8) oldString499));
+                } else {
+                    charSequence499 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, charSequence499);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F499': "+ unionIndex499));
+            }
+        }
+        int unionIndex500 = (decoder.readIndex());
+        if (unionIndex500 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, null);
+        } else {
+            if (unionIndex500 == 1) {
+                Utf8 charSequence500;
+                Object oldString500 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(500);
+                if (oldString500 instanceof Utf8) {
+                    charSequence500 = (decoder).readString(((Utf8) oldString500));
+                } else {
+                    charSequence500 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, charSequence500);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F500': "+ unionIndex500));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex501 = (decoder.readIndex());
+        if (unionIndex501 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, null);
+        } else {
+            if (unionIndex501 == 1) {
+                Utf8 charSequence501;
+                Object oldString501 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(501);
+                if (oldString501 instanceof Utf8) {
+                    charSequence501 = (decoder).readString(((Utf8) oldString501));
+                } else {
+                    charSequence501 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, charSequence501);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F501': "+ unionIndex501));
+            }
+        }
+        int unionIndex502 = (decoder.readIndex());
+        if (unionIndex502 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, null);
+        } else {
+            if (unionIndex502 == 1) {
+                Utf8 charSequence502;
+                Object oldString502 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(502);
+                if (oldString502 instanceof Utf8) {
+                    charSequence502 = (decoder).readString(((Utf8) oldString502));
+                } else {
+                    charSequence502 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, charSequence502);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F502': "+ unionIndex502));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex503 = (decoder.readIndex());
+        if (unionIndex503 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, null);
+        } else {
+            if (unionIndex503 == 1) {
+                Utf8 charSequence503;
+                Object oldString503 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(503);
+                if (oldString503 instanceof Utf8) {
+                    charSequence503 = (decoder).readString(((Utf8) oldString503));
+                } else {
+                    charSequence503 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, charSequence503);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F503': "+ unionIndex503));
+            }
+        }
+        int unionIndex504 = (decoder.readIndex());
+        if (unionIndex504 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, null);
+        } else {
+            if (unionIndex504 == 1) {
+                Utf8 charSequence504;
+                Object oldString504 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(504);
+                if (oldString504 instanceof Utf8) {
+                    charSequence504 = (decoder).readString(((Utf8) oldString504));
+                } else {
+                    charSequence504 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, charSequence504);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F504': "+ unionIndex504));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex505 = (decoder.readIndex());
+        if (unionIndex505 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, null);
+        } else {
+            if (unionIndex505 == 1) {
+                Utf8 charSequence505;
+                Object oldString505 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(505);
+                if (oldString505 instanceof Utf8) {
+                    charSequence505 = (decoder).readString(((Utf8) oldString505));
+                } else {
+                    charSequence505 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, charSequence505);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F505': "+ unionIndex505));
+            }
+        }
+        int unionIndex506 = (decoder.readIndex());
+        if (unionIndex506 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, null);
+        } else {
+            if (unionIndex506 == 1) {
+                Utf8 charSequence506;
+                Object oldString506 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(506);
+                if (oldString506 instanceof Utf8) {
+                    charSequence506 = (decoder).readString(((Utf8) oldString506));
+                } else {
+                    charSequence506 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, charSequence506);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F506': "+ unionIndex506));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex507 = (decoder.readIndex());
+        if (unionIndex507 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, null);
+        } else {
+            if (unionIndex507 == 1) {
+                Utf8 charSequence507;
+                Object oldString507 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(507);
+                if (oldString507 instanceof Utf8) {
+                    charSequence507 = (decoder).readString(((Utf8) oldString507));
+                } else {
+                    charSequence507 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, charSequence507);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F507': "+ unionIndex507));
+            }
+        }
+        int unionIndex508 = (decoder.readIndex());
+        if (unionIndex508 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, null);
+        } else {
+            if (unionIndex508 == 1) {
+                Utf8 charSequence508;
+                Object oldString508 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(508);
+                if (oldString508 instanceof Utf8) {
+                    charSequence508 = (decoder).readString(((Utf8) oldString508));
+                } else {
+                    charSequence508 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, charSequence508);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F508': "+ unionIndex508));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex509 = (decoder.readIndex());
+        if (unionIndex509 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, null);
+        } else {
+            if (unionIndex509 == 1) {
+                Utf8 charSequence509;
+                Object oldString509 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(509);
+                if (oldString509 instanceof Utf8) {
+                    charSequence509 = (decoder).readString(((Utf8) oldString509));
+                } else {
+                    charSequence509 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, charSequence509);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F509': "+ unionIndex509));
+            }
+        }
+        int unionIndex510 = (decoder.readIndex());
+        if (unionIndex510 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, null);
+        } else {
+            if (unionIndex510 == 1) {
+                Utf8 charSequence510;
+                Object oldString510 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(510);
+                if (oldString510 instanceof Utf8) {
+                    charSequence510 = (decoder).readString(((Utf8) oldString510));
+                } else {
+                    charSequence510 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, charSequence510);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F510': "+ unionIndex510));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex511 = (decoder.readIndex());
+        if (unionIndex511 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, null);
+        } else {
+            if (unionIndex511 == 1) {
+                Utf8 charSequence511;
+                Object oldString511 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(511);
+                if (oldString511 instanceof Utf8) {
+                    charSequence511 = (decoder).readString(((Utf8) oldString511));
+                } else {
+                    charSequence511 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, charSequence511);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F511': "+ unionIndex511));
+            }
+        }
+        int unionIndex512 = (decoder.readIndex());
+        if (unionIndex512 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, null);
+        } else {
+            if (unionIndex512 == 1) {
+                Utf8 charSequence512;
+                Object oldString512 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(512);
+                if (oldString512 instanceof Utf8) {
+                    charSequence512 = (decoder).readString(((Utf8) oldString512));
+                } else {
+                    charSequence512 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, charSequence512);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F512': "+ unionIndex512));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex513 = (decoder.readIndex());
+        if (unionIndex513 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, null);
+        } else {
+            if (unionIndex513 == 1) {
+                Utf8 charSequence513;
+                Object oldString513 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(513);
+                if (oldString513 instanceof Utf8) {
+                    charSequence513 = (decoder).readString(((Utf8) oldString513));
+                } else {
+                    charSequence513 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, charSequence513);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F513': "+ unionIndex513));
+            }
+        }
+        int unionIndex514 = (decoder.readIndex());
+        if (unionIndex514 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, null);
+        } else {
+            if (unionIndex514 == 1) {
+                Utf8 charSequence514;
+                Object oldString514 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(514);
+                if (oldString514 instanceof Utf8) {
+                    charSequence514 = (decoder).readString(((Utf8) oldString514));
+                } else {
+                    charSequence514 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, charSequence514);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F514': "+ unionIndex514));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex515 = (decoder.readIndex());
+        if (unionIndex515 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, null);
+        } else {
+            if (unionIndex515 == 1) {
+                Utf8 charSequence515;
+                Object oldString515 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(515);
+                if (oldString515 instanceof Utf8) {
+                    charSequence515 = (decoder).readString(((Utf8) oldString515));
+                } else {
+                    charSequence515 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, charSequence515);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F515': "+ unionIndex515));
+            }
+        }
+        int unionIndex516 = (decoder.readIndex());
+        if (unionIndex516 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, null);
+        } else {
+            if (unionIndex516 == 1) {
+                Utf8 charSequence516;
+                Object oldString516 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(516);
+                if (oldString516 instanceof Utf8) {
+                    charSequence516 = (decoder).readString(((Utf8) oldString516));
+                } else {
+                    charSequence516 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, charSequence516);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F516': "+ unionIndex516));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex517 = (decoder.readIndex());
+        if (unionIndex517 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, null);
+        } else {
+            if (unionIndex517 == 1) {
+                Utf8 charSequence517;
+                Object oldString517 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(517);
+                if (oldString517 instanceof Utf8) {
+                    charSequence517 = (decoder).readString(((Utf8) oldString517));
+                } else {
+                    charSequence517 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, charSequence517);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F517': "+ unionIndex517));
+            }
+        }
+        int unionIndex518 = (decoder.readIndex());
+        if (unionIndex518 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, null);
+        } else {
+            if (unionIndex518 == 1) {
+                Utf8 charSequence518;
+                Object oldString518 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(518);
+                if (oldString518 instanceof Utf8) {
+                    charSequence518 = (decoder).readString(((Utf8) oldString518));
+                } else {
+                    charSequence518 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, charSequence518);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F518': "+ unionIndex518));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex519 = (decoder.readIndex());
+        if (unionIndex519 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, null);
+        } else {
+            if (unionIndex519 == 1) {
+                Utf8 charSequence519;
+                Object oldString519 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(519);
+                if (oldString519 instanceof Utf8) {
+                    charSequence519 = (decoder).readString(((Utf8) oldString519));
+                } else {
+                    charSequence519 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, charSequence519);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F519': "+ unionIndex519));
+            }
+        }
+        int unionIndex520 = (decoder.readIndex());
+        if (unionIndex520 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, null);
+        } else {
+            if (unionIndex520 == 1) {
+                Utf8 charSequence520;
+                Object oldString520 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(520);
+                if (oldString520 instanceof Utf8) {
+                    charSequence520 = (decoder).readString(((Utf8) oldString520));
+                } else {
+                    charSequence520 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, charSequence520);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F520': "+ unionIndex520));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex521 = (decoder.readIndex());
+        if (unionIndex521 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, null);
+        } else {
+            if (unionIndex521 == 1) {
+                Utf8 charSequence521;
+                Object oldString521 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(521);
+                if (oldString521 instanceof Utf8) {
+                    charSequence521 = (decoder).readString(((Utf8) oldString521));
+                } else {
+                    charSequence521 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, charSequence521);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F521': "+ unionIndex521));
+            }
+        }
+        int unionIndex522 = (decoder.readIndex());
+        if (unionIndex522 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, null);
+        } else {
+            if (unionIndex522 == 1) {
+                Utf8 charSequence522;
+                Object oldString522 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(522);
+                if (oldString522 instanceof Utf8) {
+                    charSequence522 = (decoder).readString(((Utf8) oldString522));
+                } else {
+                    charSequence522 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, charSequence522);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F522': "+ unionIndex522));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex523 = (decoder.readIndex());
+        if (unionIndex523 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, null);
+        } else {
+            if (unionIndex523 == 1) {
+                Utf8 charSequence523;
+                Object oldString523 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(523);
+                if (oldString523 instanceof Utf8) {
+                    charSequence523 = (decoder).readString(((Utf8) oldString523));
+                } else {
+                    charSequence523 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, charSequence523);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F523': "+ unionIndex523));
+            }
+        }
+        int unionIndex524 = (decoder.readIndex());
+        if (unionIndex524 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, null);
+        } else {
+            if (unionIndex524 == 1) {
+                Utf8 charSequence524;
+                Object oldString524 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(524);
+                if (oldString524 instanceof Utf8) {
+                    charSequence524 = (decoder).readString(((Utf8) oldString524));
+                } else {
+                    charSequence524 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, charSequence524);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F524': "+ unionIndex524));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex525 = (decoder.readIndex());
+        if (unionIndex525 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, null);
+        } else {
+            if (unionIndex525 == 1) {
+                Utf8 charSequence525;
+                Object oldString525 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(525);
+                if (oldString525 instanceof Utf8) {
+                    charSequence525 = (decoder).readString(((Utf8) oldString525));
+                } else {
+                    charSequence525 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, charSequence525);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F525': "+ unionIndex525));
+            }
+        }
+        int unionIndex526 = (decoder.readIndex());
+        if (unionIndex526 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, null);
+        } else {
+            if (unionIndex526 == 1) {
+                Utf8 charSequence526;
+                Object oldString526 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(526);
+                if (oldString526 instanceof Utf8) {
+                    charSequence526 = (decoder).readString(((Utf8) oldString526));
+                } else {
+                    charSequence526 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, charSequence526);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F526': "+ unionIndex526));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex527 = (decoder.readIndex());
+        if (unionIndex527 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, null);
+        } else {
+            if (unionIndex527 == 1) {
+                Utf8 charSequence527;
+                Object oldString527 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(527);
+                if (oldString527 instanceof Utf8) {
+                    charSequence527 = (decoder).readString(((Utf8) oldString527));
+                } else {
+                    charSequence527 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, charSequence527);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F527': "+ unionIndex527));
+            }
+        }
+        int unionIndex528 = (decoder.readIndex());
+        if (unionIndex528 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, null);
+        } else {
+            if (unionIndex528 == 1) {
+                Utf8 charSequence528;
+                Object oldString528 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(528);
+                if (oldString528 instanceof Utf8) {
+                    charSequence528 = (decoder).readString(((Utf8) oldString528));
+                } else {
+                    charSequence528 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, charSequence528);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F528': "+ unionIndex528));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex529 = (decoder.readIndex());
+        if (unionIndex529 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, null);
+        } else {
+            if (unionIndex529 == 1) {
+                Utf8 charSequence529;
+                Object oldString529 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(529);
+                if (oldString529 instanceof Utf8) {
+                    charSequence529 = (decoder).readString(((Utf8) oldString529));
+                } else {
+                    charSequence529 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, charSequence529);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F529': "+ unionIndex529));
+            }
+        }
+        int unionIndex530 = (decoder.readIndex());
+        if (unionIndex530 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, null);
+        } else {
+            if (unionIndex530 == 1) {
+                Utf8 charSequence530;
+                Object oldString530 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(530);
+                if (oldString530 instanceof Utf8) {
+                    charSequence530 = (decoder).readString(((Utf8) oldString530));
+                } else {
+                    charSequence530 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, charSequence530);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F530': "+ unionIndex530));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex531 = (decoder.readIndex());
+        if (unionIndex531 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, null);
+        } else {
+            if (unionIndex531 == 1) {
+                Utf8 charSequence531;
+                Object oldString531 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(531);
+                if (oldString531 instanceof Utf8) {
+                    charSequence531 = (decoder).readString(((Utf8) oldString531));
+                } else {
+                    charSequence531 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, charSequence531);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F531': "+ unionIndex531));
+            }
+        }
+        int unionIndex532 = (decoder.readIndex());
+        if (unionIndex532 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, null);
+        } else {
+            if (unionIndex532 == 1) {
+                Utf8 charSequence532;
+                Object oldString532 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(532);
+                if (oldString532 instanceof Utf8) {
+                    charSequence532 = (decoder).readString(((Utf8) oldString532));
+                } else {
+                    charSequence532 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, charSequence532);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F532': "+ unionIndex532));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex533 = (decoder.readIndex());
+        if (unionIndex533 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, null);
+        } else {
+            if (unionIndex533 == 1) {
+                Utf8 charSequence533;
+                Object oldString533 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(533);
+                if (oldString533 instanceof Utf8) {
+                    charSequence533 = (decoder).readString(((Utf8) oldString533));
+                } else {
+                    charSequence533 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, charSequence533);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F533': "+ unionIndex533));
+            }
+        }
+        int unionIndex534 = (decoder.readIndex());
+        if (unionIndex534 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, null);
+        } else {
+            if (unionIndex534 == 1) {
+                Utf8 charSequence534;
+                Object oldString534 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(534);
+                if (oldString534 instanceof Utf8) {
+                    charSequence534 = (decoder).readString(((Utf8) oldString534));
+                } else {
+                    charSequence534 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, charSequence534);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F534': "+ unionIndex534));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex535 = (decoder.readIndex());
+        if (unionIndex535 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, null);
+        } else {
+            if (unionIndex535 == 1) {
+                Utf8 charSequence535;
+                Object oldString535 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(535);
+                if (oldString535 instanceof Utf8) {
+                    charSequence535 = (decoder).readString(((Utf8) oldString535));
+                } else {
+                    charSequence535 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, charSequence535);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F535': "+ unionIndex535));
+            }
+        }
+        int unionIndex536 = (decoder.readIndex());
+        if (unionIndex536 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, null);
+        } else {
+            if (unionIndex536 == 1) {
+                Utf8 charSequence536;
+                Object oldString536 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(536);
+                if (oldString536 instanceof Utf8) {
+                    charSequence536 = (decoder).readString(((Utf8) oldString536));
+                } else {
+                    charSequence536 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, charSequence536);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F536': "+ unionIndex536));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex537 = (decoder.readIndex());
+        if (unionIndex537 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, null);
+        } else {
+            if (unionIndex537 == 1) {
+                Utf8 charSequence537;
+                Object oldString537 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(537);
+                if (oldString537 instanceof Utf8) {
+                    charSequence537 = (decoder).readString(((Utf8) oldString537));
+                } else {
+                    charSequence537 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, charSequence537);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F537': "+ unionIndex537));
+            }
+        }
+        int unionIndex538 = (decoder.readIndex());
+        if (unionIndex538 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, null);
+        } else {
+            if (unionIndex538 == 1) {
+                Utf8 charSequence538;
+                Object oldString538 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(538);
+                if (oldString538 instanceof Utf8) {
+                    charSequence538 = (decoder).readString(((Utf8) oldString538));
+                } else {
+                    charSequence538 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, charSequence538);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F538': "+ unionIndex538));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex539 = (decoder.readIndex());
+        if (unionIndex539 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, null);
+        } else {
+            if (unionIndex539 == 1) {
+                Utf8 charSequence539;
+                Object oldString539 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(539);
+                if (oldString539 instanceof Utf8) {
+                    charSequence539 = (decoder).readString(((Utf8) oldString539));
+                } else {
+                    charSequence539 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, charSequence539);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F539': "+ unionIndex539));
+            }
+        }
+        int unionIndex540 = (decoder.readIndex());
+        if (unionIndex540 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, null);
+        } else {
+            if (unionIndex540 == 1) {
+                Utf8 charSequence540;
+                Object oldString540 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(540);
+                if (oldString540 instanceof Utf8) {
+                    charSequence540 = (decoder).readString(((Utf8) oldString540));
+                } else {
+                    charSequence540 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, charSequence540);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F540': "+ unionIndex540));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex541 = (decoder.readIndex());
+        if (unionIndex541 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, null);
+        } else {
+            if (unionIndex541 == 1) {
+                Utf8 charSequence541;
+                Object oldString541 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(541);
+                if (oldString541 instanceof Utf8) {
+                    charSequence541 = (decoder).readString(((Utf8) oldString541));
+                } else {
+                    charSequence541 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, charSequence541);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F541': "+ unionIndex541));
+            }
+        }
+        int unionIndex542 = (decoder.readIndex());
+        if (unionIndex542 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, null);
+        } else {
+            if (unionIndex542 == 1) {
+                Utf8 charSequence542;
+                Object oldString542 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(542);
+                if (oldString542 instanceof Utf8) {
+                    charSequence542 = (decoder).readString(((Utf8) oldString542));
+                } else {
+                    charSequence542 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, charSequence542);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F542': "+ unionIndex542));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex543 = (decoder.readIndex());
+        if (unionIndex543 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, null);
+        } else {
+            if (unionIndex543 == 1) {
+                Utf8 charSequence543;
+                Object oldString543 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(543);
+                if (oldString543 instanceof Utf8) {
+                    charSequence543 = (decoder).readString(((Utf8) oldString543));
+                } else {
+                    charSequence543 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, charSequence543);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F543': "+ unionIndex543));
+            }
+        }
+        int unionIndex544 = (decoder.readIndex());
+        if (unionIndex544 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, null);
+        } else {
+            if (unionIndex544 == 1) {
+                Utf8 charSequence544;
+                Object oldString544 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(544);
+                if (oldString544 instanceof Utf8) {
+                    charSequence544 = (decoder).readString(((Utf8) oldString544));
+                } else {
+                    charSequence544 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, charSequence544);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F544': "+ unionIndex544));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex545 = (decoder.readIndex());
+        if (unionIndex545 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, null);
+        } else {
+            if (unionIndex545 == 1) {
+                Utf8 charSequence545;
+                Object oldString545 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(545);
+                if (oldString545 instanceof Utf8) {
+                    charSequence545 = (decoder).readString(((Utf8) oldString545));
+                } else {
+                    charSequence545 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, charSequence545);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F545': "+ unionIndex545));
+            }
+        }
+        int unionIndex546 = (decoder.readIndex());
+        if (unionIndex546 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, null);
+        } else {
+            if (unionIndex546 == 1) {
+                Utf8 charSequence546;
+                Object oldString546 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(546);
+                if (oldString546 instanceof Utf8) {
+                    charSequence546 = (decoder).readString(((Utf8) oldString546));
+                } else {
+                    charSequence546 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, charSequence546);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F546': "+ unionIndex546));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex547 = (decoder.readIndex());
+        if (unionIndex547 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, null);
+        } else {
+            if (unionIndex547 == 1) {
+                Utf8 charSequence547;
+                Object oldString547 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(547);
+                if (oldString547 instanceof Utf8) {
+                    charSequence547 = (decoder).readString(((Utf8) oldString547));
+                } else {
+                    charSequence547 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, charSequence547);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F547': "+ unionIndex547));
+            }
+        }
+        int unionIndex548 = (decoder.readIndex());
+        if (unionIndex548 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, null);
+        } else {
+            if (unionIndex548 == 1) {
+                Utf8 charSequence548;
+                Object oldString548 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(548);
+                if (oldString548 instanceof Utf8) {
+                    charSequence548 = (decoder).readString(((Utf8) oldString548));
+                } else {
+                    charSequence548 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, charSequence548);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F548': "+ unionIndex548));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex549 = (decoder.readIndex());
+        if (unionIndex549 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, null);
+        } else {
+            if (unionIndex549 == 1) {
+                Utf8 charSequence549;
+                Object oldString549 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(549);
+                if (oldString549 instanceof Utf8) {
+                    charSequence549 = (decoder).readString(((Utf8) oldString549));
+                } else {
+                    charSequence549 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, charSequence549);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F549': "+ unionIndex549));
+            }
+        }
+        int unionIndex550 = (decoder.readIndex());
+        if (unionIndex550 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, null);
+        } else {
+            if (unionIndex550 == 1) {
+                Utf8 charSequence550;
+                Object oldString550 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(550);
+                if (oldString550 instanceof Utf8) {
+                    charSequence550 = (decoder).readString(((Utf8) oldString550));
+                } else {
+                    charSequence550 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, charSequence550);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F550': "+ unionIndex550));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex551 = (decoder.readIndex());
+        if (unionIndex551 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, null);
+        } else {
+            if (unionIndex551 == 1) {
+                Utf8 charSequence551;
+                Object oldString551 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(551);
+                if (oldString551 instanceof Utf8) {
+                    charSequence551 = (decoder).readString(((Utf8) oldString551));
+                } else {
+                    charSequence551 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, charSequence551);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F551': "+ unionIndex551));
+            }
+        }
+        int unionIndex552 = (decoder.readIndex());
+        if (unionIndex552 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, null);
+        } else {
+            if (unionIndex552 == 1) {
+                Utf8 charSequence552;
+                Object oldString552 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(552);
+                if (oldString552 instanceof Utf8) {
+                    charSequence552 = (decoder).readString(((Utf8) oldString552));
+                } else {
+                    charSequence552 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, charSequence552);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F552': "+ unionIndex552));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex553 = (decoder.readIndex());
+        if (unionIndex553 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, null);
+        } else {
+            if (unionIndex553 == 1) {
+                Utf8 charSequence553;
+                Object oldString553 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(553);
+                if (oldString553 instanceof Utf8) {
+                    charSequence553 = (decoder).readString(((Utf8) oldString553));
+                } else {
+                    charSequence553 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, charSequence553);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F553': "+ unionIndex553));
+            }
+        }
+        int unionIndex554 = (decoder.readIndex());
+        if (unionIndex554 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, null);
+        } else {
+            if (unionIndex554 == 1) {
+                Utf8 charSequence554;
+                Object oldString554 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(554);
+                if (oldString554 instanceof Utf8) {
+                    charSequence554 = (decoder).readString(((Utf8) oldString554));
+                } else {
+                    charSequence554 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, charSequence554);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F554': "+ unionIndex554));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex555 = (decoder.readIndex());
+        if (unionIndex555 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, null);
+        } else {
+            if (unionIndex555 == 1) {
+                Utf8 charSequence555;
+                Object oldString555 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(555);
+                if (oldString555 instanceof Utf8) {
+                    charSequence555 = (decoder).readString(((Utf8) oldString555));
+                } else {
+                    charSequence555 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, charSequence555);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F555': "+ unionIndex555));
+            }
+        }
+        int unionIndex556 = (decoder.readIndex());
+        if (unionIndex556 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, null);
+        } else {
+            if (unionIndex556 == 1) {
+                Utf8 charSequence556;
+                Object oldString556 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(556);
+                if (oldString556 instanceof Utf8) {
+                    charSequence556 = (decoder).readString(((Utf8) oldString556));
+                } else {
+                    charSequence556 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, charSequence556);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F556': "+ unionIndex556));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex557 = (decoder.readIndex());
+        if (unionIndex557 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, null);
+        } else {
+            if (unionIndex557 == 1) {
+                Utf8 charSequence557;
+                Object oldString557 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(557);
+                if (oldString557 instanceof Utf8) {
+                    charSequence557 = (decoder).readString(((Utf8) oldString557));
+                } else {
+                    charSequence557 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, charSequence557);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F557': "+ unionIndex557));
+            }
+        }
+        int unionIndex558 = (decoder.readIndex());
+        if (unionIndex558 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, null);
+        } else {
+            if (unionIndex558 == 1) {
+                Utf8 charSequence558;
+                Object oldString558 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(558);
+                if (oldString558 instanceof Utf8) {
+                    charSequence558 = (decoder).readString(((Utf8) oldString558));
+                } else {
+                    charSequence558 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, charSequence558);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F558': "+ unionIndex558));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex559 = (decoder.readIndex());
+        if (unionIndex559 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, null);
+        } else {
+            if (unionIndex559 == 1) {
+                Utf8 charSequence559;
+                Object oldString559 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(559);
+                if (oldString559 instanceof Utf8) {
+                    charSequence559 = (decoder).readString(((Utf8) oldString559));
+                } else {
+                    charSequence559 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, charSequence559);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F559': "+ unionIndex559));
+            }
+        }
+        int unionIndex560 = (decoder.readIndex());
+        if (unionIndex560 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, null);
+        } else {
+            if (unionIndex560 == 1) {
+                Utf8 charSequence560;
+                Object oldString560 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(560);
+                if (oldString560 instanceof Utf8) {
+                    charSequence560 = (decoder).readString(((Utf8) oldString560));
+                } else {
+                    charSequence560 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, charSequence560);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F560': "+ unionIndex560));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex561 = (decoder.readIndex());
+        if (unionIndex561 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, null);
+        } else {
+            if (unionIndex561 == 1) {
+                Utf8 charSequence561;
+                Object oldString561 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(561);
+                if (oldString561 instanceof Utf8) {
+                    charSequence561 = (decoder).readString(((Utf8) oldString561));
+                } else {
+                    charSequence561 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, charSequence561);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F561': "+ unionIndex561));
+            }
+        }
+        int unionIndex562 = (decoder.readIndex());
+        if (unionIndex562 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, null);
+        } else {
+            if (unionIndex562 == 1) {
+                Utf8 charSequence562;
+                Object oldString562 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(562);
+                if (oldString562 instanceof Utf8) {
+                    charSequence562 = (decoder).readString(((Utf8) oldString562));
+                } else {
+                    charSequence562 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, charSequence562);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F562': "+ unionIndex562));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex563 = (decoder.readIndex());
+        if (unionIndex563 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, null);
+        } else {
+            if (unionIndex563 == 1) {
+                Utf8 charSequence563;
+                Object oldString563 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(563);
+                if (oldString563 instanceof Utf8) {
+                    charSequence563 = (decoder).readString(((Utf8) oldString563));
+                } else {
+                    charSequence563 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, charSequence563);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F563': "+ unionIndex563));
+            }
+        }
+        int unionIndex564 = (decoder.readIndex());
+        if (unionIndex564 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, null);
+        } else {
+            if (unionIndex564 == 1) {
+                Utf8 charSequence564;
+                Object oldString564 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(564);
+                if (oldString564 instanceof Utf8) {
+                    charSequence564 = (decoder).readString(((Utf8) oldString564));
+                } else {
+                    charSequence564 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, charSequence564);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F564': "+ unionIndex564));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex565 = (decoder.readIndex());
+        if (unionIndex565 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, null);
+        } else {
+            if (unionIndex565 == 1) {
+                Utf8 charSequence565;
+                Object oldString565 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(565);
+                if (oldString565 instanceof Utf8) {
+                    charSequence565 = (decoder).readString(((Utf8) oldString565));
+                } else {
+                    charSequence565 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, charSequence565);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F565': "+ unionIndex565));
+            }
+        }
+        int unionIndex566 = (decoder.readIndex());
+        if (unionIndex566 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, null);
+        } else {
+            if (unionIndex566 == 1) {
+                Utf8 charSequence566;
+                Object oldString566 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(566);
+                if (oldString566 instanceof Utf8) {
+                    charSequence566 = (decoder).readString(((Utf8) oldString566));
+                } else {
+                    charSequence566 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, charSequence566);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F566': "+ unionIndex566));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex567 = (decoder.readIndex());
+        if (unionIndex567 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, null);
+        } else {
+            if (unionIndex567 == 1) {
+                Utf8 charSequence567;
+                Object oldString567 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(567);
+                if (oldString567 instanceof Utf8) {
+                    charSequence567 = (decoder).readString(((Utf8) oldString567));
+                } else {
+                    charSequence567 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, charSequence567);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F567': "+ unionIndex567));
+            }
+        }
+        int unionIndex568 = (decoder.readIndex());
+        if (unionIndex568 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, null);
+        } else {
+            if (unionIndex568 == 1) {
+                Utf8 charSequence568;
+                Object oldString568 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(568);
+                if (oldString568 instanceof Utf8) {
+                    charSequence568 = (decoder).readString(((Utf8) oldString568));
+                } else {
+                    charSequence568 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, charSequence568);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F568': "+ unionIndex568));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex569 = (decoder.readIndex());
+        if (unionIndex569 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, null);
+        } else {
+            if (unionIndex569 == 1) {
+                Utf8 charSequence569;
+                Object oldString569 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(569);
+                if (oldString569 instanceof Utf8) {
+                    charSequence569 = (decoder).readString(((Utf8) oldString569));
+                } else {
+                    charSequence569 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, charSequence569);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F569': "+ unionIndex569));
+            }
+        }
+        int unionIndex570 = (decoder.readIndex());
+        if (unionIndex570 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, null);
+        } else {
+            if (unionIndex570 == 1) {
+                Utf8 charSequence570;
+                Object oldString570 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(570);
+                if (oldString570 instanceof Utf8) {
+                    charSequence570 = (decoder).readString(((Utf8) oldString570));
+                } else {
+                    charSequence570 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, charSequence570);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F570': "+ unionIndex570));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex571 = (decoder.readIndex());
+        if (unionIndex571 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, null);
+        } else {
+            if (unionIndex571 == 1) {
+                Utf8 charSequence571;
+                Object oldString571 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(571);
+                if (oldString571 instanceof Utf8) {
+                    charSequence571 = (decoder).readString(((Utf8) oldString571));
+                } else {
+                    charSequence571 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, charSequence571);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F571': "+ unionIndex571));
+            }
+        }
+        int unionIndex572 = (decoder.readIndex());
+        if (unionIndex572 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, null);
+        } else {
+            if (unionIndex572 == 1) {
+                Utf8 charSequence572;
+                Object oldString572 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(572);
+                if (oldString572 instanceof Utf8) {
+                    charSequence572 = (decoder).readString(((Utf8) oldString572));
+                } else {
+                    charSequence572 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, charSequence572);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F572': "+ unionIndex572));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex573 = (decoder.readIndex());
+        if (unionIndex573 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, null);
+        } else {
+            if (unionIndex573 == 1) {
+                Utf8 charSequence573;
+                Object oldString573 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(573);
+                if (oldString573 instanceof Utf8) {
+                    charSequence573 = (decoder).readString(((Utf8) oldString573));
+                } else {
+                    charSequence573 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, charSequence573);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F573': "+ unionIndex573));
+            }
+        }
+        int unionIndex574 = (decoder.readIndex());
+        if (unionIndex574 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, null);
+        } else {
+            if (unionIndex574 == 1) {
+                Utf8 charSequence574;
+                Object oldString574 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(574);
+                if (oldString574 instanceof Utf8) {
+                    charSequence574 = (decoder).readString(((Utf8) oldString574));
+                } else {
+                    charSequence574 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, charSequence574);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F574': "+ unionIndex574));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex575 = (decoder.readIndex());
+        if (unionIndex575 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, null);
+        } else {
+            if (unionIndex575 == 1) {
+                Utf8 charSequence575;
+                Object oldString575 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(575);
+                if (oldString575 instanceof Utf8) {
+                    charSequence575 = (decoder).readString(((Utf8) oldString575));
+                } else {
+                    charSequence575 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, charSequence575);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F575': "+ unionIndex575));
+            }
+        }
+        int unionIndex576 = (decoder.readIndex());
+        if (unionIndex576 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, null);
+        } else {
+            if (unionIndex576 == 1) {
+                Utf8 charSequence576;
+                Object oldString576 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(576);
+                if (oldString576 instanceof Utf8) {
+                    charSequence576 = (decoder).readString(((Utf8) oldString576));
+                } else {
+                    charSequence576 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, charSequence576);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F576': "+ unionIndex576));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex577 = (decoder.readIndex());
+        if (unionIndex577 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, null);
+        } else {
+            if (unionIndex577 == 1) {
+                Utf8 charSequence577;
+                Object oldString577 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(577);
+                if (oldString577 instanceof Utf8) {
+                    charSequence577 = (decoder).readString(((Utf8) oldString577));
+                } else {
+                    charSequence577 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, charSequence577);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F577': "+ unionIndex577));
+            }
+        }
+        int unionIndex578 = (decoder.readIndex());
+        if (unionIndex578 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, null);
+        } else {
+            if (unionIndex578 == 1) {
+                Utf8 charSequence578;
+                Object oldString578 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(578);
+                if (oldString578 instanceof Utf8) {
+                    charSequence578 = (decoder).readString(((Utf8) oldString578));
+                } else {
+                    charSequence578 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, charSequence578);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F578': "+ unionIndex578));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex579 = (decoder.readIndex());
+        if (unionIndex579 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, null);
+        } else {
+            if (unionIndex579 == 1) {
+                Utf8 charSequence579;
+                Object oldString579 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(579);
+                if (oldString579 instanceof Utf8) {
+                    charSequence579 = (decoder).readString(((Utf8) oldString579));
+                } else {
+                    charSequence579 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, charSequence579);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F579': "+ unionIndex579));
+            }
+        }
+        int unionIndex580 = (decoder.readIndex());
+        if (unionIndex580 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, null);
+        } else {
+            if (unionIndex580 == 1) {
+                Utf8 charSequence580;
+                Object oldString580 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(580);
+                if (oldString580 instanceof Utf8) {
+                    charSequence580 = (decoder).readString(((Utf8) oldString580));
+                } else {
+                    charSequence580 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, charSequence580);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F580': "+ unionIndex580));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex581 = (decoder.readIndex());
+        if (unionIndex581 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, null);
+        } else {
+            if (unionIndex581 == 1) {
+                Utf8 charSequence581;
+                Object oldString581 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(581);
+                if (oldString581 instanceof Utf8) {
+                    charSequence581 = (decoder).readString(((Utf8) oldString581));
+                } else {
+                    charSequence581 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, charSequence581);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F581': "+ unionIndex581));
+            }
+        }
+        int unionIndex582 = (decoder.readIndex());
+        if (unionIndex582 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, null);
+        } else {
+            if (unionIndex582 == 1) {
+                Utf8 charSequence582;
+                Object oldString582 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(582);
+                if (oldString582 instanceof Utf8) {
+                    charSequence582 = (decoder).readString(((Utf8) oldString582));
+                } else {
+                    charSequence582 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, charSequence582);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F582': "+ unionIndex582));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex583 = (decoder.readIndex());
+        if (unionIndex583 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, null);
+        } else {
+            if (unionIndex583 == 1) {
+                Utf8 charSequence583;
+                Object oldString583 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(583);
+                if (oldString583 instanceof Utf8) {
+                    charSequence583 = (decoder).readString(((Utf8) oldString583));
+                } else {
+                    charSequence583 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, charSequence583);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F583': "+ unionIndex583));
+            }
+        }
+        int unionIndex584 = (decoder.readIndex());
+        if (unionIndex584 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, null);
+        } else {
+            if (unionIndex584 == 1) {
+                Utf8 charSequence584;
+                Object oldString584 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(584);
+                if (oldString584 instanceof Utf8) {
+                    charSequence584 = (decoder).readString(((Utf8) oldString584));
+                } else {
+                    charSequence584 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, charSequence584);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F584': "+ unionIndex584));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex585 = (decoder.readIndex());
+        if (unionIndex585 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, null);
+        } else {
+            if (unionIndex585 == 1) {
+                Utf8 charSequence585;
+                Object oldString585 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(585);
+                if (oldString585 instanceof Utf8) {
+                    charSequence585 = (decoder).readString(((Utf8) oldString585));
+                } else {
+                    charSequence585 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, charSequence585);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F585': "+ unionIndex585));
+            }
+        }
+        int unionIndex586 = (decoder.readIndex());
+        if (unionIndex586 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, null);
+        } else {
+            if (unionIndex586 == 1) {
+                Utf8 charSequence586;
+                Object oldString586 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(586);
+                if (oldString586 instanceof Utf8) {
+                    charSequence586 = (decoder).readString(((Utf8) oldString586));
+                } else {
+                    charSequence586 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, charSequence586);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F586': "+ unionIndex586));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex587 = (decoder.readIndex());
+        if (unionIndex587 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, null);
+        } else {
+            if (unionIndex587 == 1) {
+                Utf8 charSequence587;
+                Object oldString587 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(587);
+                if (oldString587 instanceof Utf8) {
+                    charSequence587 = (decoder).readString(((Utf8) oldString587));
+                } else {
+                    charSequence587 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, charSequence587);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F587': "+ unionIndex587));
+            }
+        }
+        int unionIndex588 = (decoder.readIndex());
+        if (unionIndex588 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, null);
+        } else {
+            if (unionIndex588 == 1) {
+                Utf8 charSequence588;
+                Object oldString588 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(588);
+                if (oldString588 instanceof Utf8) {
+                    charSequence588 = (decoder).readString(((Utf8) oldString588));
+                } else {
+                    charSequence588 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, charSequence588);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F588': "+ unionIndex588));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex589 = (decoder.readIndex());
+        if (unionIndex589 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, null);
+        } else {
+            if (unionIndex589 == 1) {
+                Utf8 charSequence589;
+                Object oldString589 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(589);
+                if (oldString589 instanceof Utf8) {
+                    charSequence589 = (decoder).readString(((Utf8) oldString589));
+                } else {
+                    charSequence589 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, charSequence589);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F589': "+ unionIndex589));
+            }
+        }
+        int unionIndex590 = (decoder.readIndex());
+        if (unionIndex590 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, null);
+        } else {
+            if (unionIndex590 == 1) {
+                Utf8 charSequence590;
+                Object oldString590 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(590);
+                if (oldString590 instanceof Utf8) {
+                    charSequence590 = (decoder).readString(((Utf8) oldString590));
+                } else {
+                    charSequence590 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, charSequence590);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F590': "+ unionIndex590));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex591 = (decoder.readIndex());
+        if (unionIndex591 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, null);
+        } else {
+            if (unionIndex591 == 1) {
+                Utf8 charSequence591;
+                Object oldString591 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(591);
+                if (oldString591 instanceof Utf8) {
+                    charSequence591 = (decoder).readString(((Utf8) oldString591));
+                } else {
+                    charSequence591 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, charSequence591);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F591': "+ unionIndex591));
+            }
+        }
+        int unionIndex592 = (decoder.readIndex());
+        if (unionIndex592 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, null);
+        } else {
+            if (unionIndex592 == 1) {
+                Utf8 charSequence592;
+                Object oldString592 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(592);
+                if (oldString592 instanceof Utf8) {
+                    charSequence592 = (decoder).readString(((Utf8) oldString592));
+                } else {
+                    charSequence592 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, charSequence592);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F592': "+ unionIndex592));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex593 = (decoder.readIndex());
+        if (unionIndex593 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, null);
+        } else {
+            if (unionIndex593 == 1) {
+                Utf8 charSequence593;
+                Object oldString593 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(593);
+                if (oldString593 instanceof Utf8) {
+                    charSequence593 = (decoder).readString(((Utf8) oldString593));
+                } else {
+                    charSequence593 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, charSequence593);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F593': "+ unionIndex593));
+            }
+        }
+        int unionIndex594 = (decoder.readIndex());
+        if (unionIndex594 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, null);
+        } else {
+            if (unionIndex594 == 1) {
+                Utf8 charSequence594;
+                Object oldString594 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(594);
+                if (oldString594 instanceof Utf8) {
+                    charSequence594 = (decoder).readString(((Utf8) oldString594));
+                } else {
+                    charSequence594 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, charSequence594);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F594': "+ unionIndex594));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex595 = (decoder.readIndex());
+        if (unionIndex595 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, null);
+        } else {
+            if (unionIndex595 == 1) {
+                Utf8 charSequence595;
+                Object oldString595 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(595);
+                if (oldString595 instanceof Utf8) {
+                    charSequence595 = (decoder).readString(((Utf8) oldString595));
+                } else {
+                    charSequence595 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, charSequence595);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F595': "+ unionIndex595));
+            }
+        }
+        int unionIndex596 = (decoder.readIndex());
+        if (unionIndex596 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, null);
+        } else {
+            if (unionIndex596 == 1) {
+                Utf8 charSequence596;
+                Object oldString596 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(596);
+                if (oldString596 instanceof Utf8) {
+                    charSequence596 = (decoder).readString(((Utf8) oldString596));
+                } else {
+                    charSequence596 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, charSequence596);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F596': "+ unionIndex596));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex597 = (decoder.readIndex());
+        if (unionIndex597 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, null);
+        } else {
+            if (unionIndex597 == 1) {
+                Utf8 charSequence597;
+                Object oldString597 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(597);
+                if (oldString597 instanceof Utf8) {
+                    charSequence597 = (decoder).readString(((Utf8) oldString597));
+                } else {
+                    charSequence597 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, charSequence597);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F597': "+ unionIndex597));
+            }
+        }
+        int unionIndex598 = (decoder.readIndex());
+        if (unionIndex598 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, null);
+        } else {
+            if (unionIndex598 == 1) {
+                Utf8 charSequence598;
+                Object oldString598 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(598);
+                if (oldString598 instanceof Utf8) {
+                    charSequence598 = (decoder).readString(((Utf8) oldString598));
+                } else {
+                    charSequence598 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, charSequence598);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F598': "+ unionIndex598));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex599 = (decoder.readIndex());
+        if (unionIndex599 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, null);
+        } else {
+            if (unionIndex599 == 1) {
+                Utf8 charSequence599;
+                Object oldString599 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(599);
+                if (oldString599 instanceof Utf8) {
+                    charSequence599 = (decoder).readString(((Utf8) oldString599));
+                } else {
+                    charSequence599 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, charSequence599);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F599': "+ unionIndex599));
+            }
+        }
+        int unionIndex600 = (decoder.readIndex());
+        if (unionIndex600 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, null);
+        } else {
+            if (unionIndex600 == 1) {
+                Utf8 charSequence600;
+                Object oldString600 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(600);
+                if (oldString600 instanceof Utf8) {
+                    charSequence600 = (decoder).readString(((Utf8) oldString600));
+                } else {
+                    charSequence600 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, charSequence600);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F600': "+ unionIndex600));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex601 = (decoder.readIndex());
+        if (unionIndex601 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, null);
+        } else {
+            if (unionIndex601 == 1) {
+                Utf8 charSequence601;
+                Object oldString601 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(601);
+                if (oldString601 instanceof Utf8) {
+                    charSequence601 = (decoder).readString(((Utf8) oldString601));
+                } else {
+                    charSequence601 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, charSequence601);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F601': "+ unionIndex601));
+            }
+        }
+        int unionIndex602 = (decoder.readIndex());
+        if (unionIndex602 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, null);
+        } else {
+            if (unionIndex602 == 1) {
+                Utf8 charSequence602;
+                Object oldString602 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(602);
+                if (oldString602 instanceof Utf8) {
+                    charSequence602 = (decoder).readString(((Utf8) oldString602));
+                } else {
+                    charSequence602 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, charSequence602);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F602': "+ unionIndex602));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex603 = (decoder.readIndex());
+        if (unionIndex603 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, null);
+        } else {
+            if (unionIndex603 == 1) {
+                Utf8 charSequence603;
+                Object oldString603 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(603);
+                if (oldString603 instanceof Utf8) {
+                    charSequence603 = (decoder).readString(((Utf8) oldString603));
+                } else {
+                    charSequence603 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, charSequence603);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F603': "+ unionIndex603));
+            }
+        }
+        int unionIndex604 = (decoder.readIndex());
+        if (unionIndex604 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, null);
+        } else {
+            if (unionIndex604 == 1) {
+                Utf8 charSequence604;
+                Object oldString604 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(604);
+                if (oldString604 instanceof Utf8) {
+                    charSequence604 = (decoder).readString(((Utf8) oldString604));
+                } else {
+                    charSequence604 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, charSequence604);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F604': "+ unionIndex604));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex605 = (decoder.readIndex());
+        if (unionIndex605 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, null);
+        } else {
+            if (unionIndex605 == 1) {
+                Utf8 charSequence605;
+                Object oldString605 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(605);
+                if (oldString605 instanceof Utf8) {
+                    charSequence605 = (decoder).readString(((Utf8) oldString605));
+                } else {
+                    charSequence605 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, charSequence605);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F605': "+ unionIndex605));
+            }
+        }
+        int unionIndex606 = (decoder.readIndex());
+        if (unionIndex606 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, null);
+        } else {
+            if (unionIndex606 == 1) {
+                Utf8 charSequence606;
+                Object oldString606 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(606);
+                if (oldString606 instanceof Utf8) {
+                    charSequence606 = (decoder).readString(((Utf8) oldString606));
+                } else {
+                    charSequence606 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, charSequence606);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F606': "+ unionIndex606));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex607 = (decoder.readIndex());
+        if (unionIndex607 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, null);
+        } else {
+            if (unionIndex607 == 1) {
+                Utf8 charSequence607;
+                Object oldString607 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(607);
+                if (oldString607 instanceof Utf8) {
+                    charSequence607 = (decoder).readString(((Utf8) oldString607));
+                } else {
+                    charSequence607 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, charSequence607);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F607': "+ unionIndex607));
+            }
+        }
+        int unionIndex608 = (decoder.readIndex());
+        if (unionIndex608 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, null);
+        } else {
+            if (unionIndex608 == 1) {
+                Utf8 charSequence608;
+                Object oldString608 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(608);
+                if (oldString608 instanceof Utf8) {
+                    charSequence608 = (decoder).readString(((Utf8) oldString608));
+                } else {
+                    charSequence608 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, charSequence608);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F608': "+ unionIndex608));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex609 = (decoder.readIndex());
+        if (unionIndex609 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, null);
+        } else {
+            if (unionIndex609 == 1) {
+                Utf8 charSequence609;
+                Object oldString609 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(609);
+                if (oldString609 instanceof Utf8) {
+                    charSequence609 = (decoder).readString(((Utf8) oldString609));
+                } else {
+                    charSequence609 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, charSequence609);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F609': "+ unionIndex609));
+            }
+        }
+        int unionIndex610 = (decoder.readIndex());
+        if (unionIndex610 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, null);
+        } else {
+            if (unionIndex610 == 1) {
+                Utf8 charSequence610;
+                Object oldString610 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(610);
+                if (oldString610 instanceof Utf8) {
+                    charSequence610 = (decoder).readString(((Utf8) oldString610));
+                } else {
+                    charSequence610 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, charSequence610);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F610': "+ unionIndex610));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex611 = (decoder.readIndex());
+        if (unionIndex611 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, null);
+        } else {
+            if (unionIndex611 == 1) {
+                Utf8 charSequence611;
+                Object oldString611 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(611);
+                if (oldString611 instanceof Utf8) {
+                    charSequence611 = (decoder).readString(((Utf8) oldString611));
+                } else {
+                    charSequence611 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, charSequence611);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F611': "+ unionIndex611));
+            }
+        }
+        int unionIndex612 = (decoder.readIndex());
+        if (unionIndex612 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, null);
+        } else {
+            if (unionIndex612 == 1) {
+                Utf8 charSequence612;
+                Object oldString612 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(612);
+                if (oldString612 instanceof Utf8) {
+                    charSequence612 = (decoder).readString(((Utf8) oldString612));
+                } else {
+                    charSequence612 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, charSequence612);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F612': "+ unionIndex612));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex613 = (decoder.readIndex());
+        if (unionIndex613 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, null);
+        } else {
+            if (unionIndex613 == 1) {
+                Utf8 charSequence613;
+                Object oldString613 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(613);
+                if (oldString613 instanceof Utf8) {
+                    charSequence613 = (decoder).readString(((Utf8) oldString613));
+                } else {
+                    charSequence613 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, charSequence613);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F613': "+ unionIndex613));
+            }
+        }
+        int unionIndex614 = (decoder.readIndex());
+        if (unionIndex614 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, null);
+        } else {
+            if (unionIndex614 == 1) {
+                Utf8 charSequence614;
+                Object oldString614 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(614);
+                if (oldString614 instanceof Utf8) {
+                    charSequence614 = (decoder).readString(((Utf8) oldString614));
+                } else {
+                    charSequence614 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, charSequence614);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F614': "+ unionIndex614));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex615 = (decoder.readIndex());
+        if (unionIndex615 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, null);
+        } else {
+            if (unionIndex615 == 1) {
+                Utf8 charSequence615;
+                Object oldString615 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(615);
+                if (oldString615 instanceof Utf8) {
+                    charSequence615 = (decoder).readString(((Utf8) oldString615));
+                } else {
+                    charSequence615 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, charSequence615);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F615': "+ unionIndex615));
+            }
+        }
+        int unionIndex616 = (decoder.readIndex());
+        if (unionIndex616 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, null);
+        } else {
+            if (unionIndex616 == 1) {
+                Utf8 charSequence616;
+                Object oldString616 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(616);
+                if (oldString616 instanceof Utf8) {
+                    charSequence616 = (decoder).readString(((Utf8) oldString616));
+                } else {
+                    charSequence616 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, charSequence616);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F616': "+ unionIndex616));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex617 = (decoder.readIndex());
+        if (unionIndex617 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, null);
+        } else {
+            if (unionIndex617 == 1) {
+                Utf8 charSequence617;
+                Object oldString617 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(617);
+                if (oldString617 instanceof Utf8) {
+                    charSequence617 = (decoder).readString(((Utf8) oldString617));
+                } else {
+                    charSequence617 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, charSequence617);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F617': "+ unionIndex617));
+            }
+        }
+        int unionIndex618 = (decoder.readIndex());
+        if (unionIndex618 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, null);
+        } else {
+            if (unionIndex618 == 1) {
+                Utf8 charSequence618;
+                Object oldString618 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(618);
+                if (oldString618 instanceof Utf8) {
+                    charSequence618 = (decoder).readString(((Utf8) oldString618));
+                } else {
+                    charSequence618 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, charSequence618);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F618': "+ unionIndex618));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex619 = (decoder.readIndex());
+        if (unionIndex619 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, null);
+        } else {
+            if (unionIndex619 == 1) {
+                Utf8 charSequence619;
+                Object oldString619 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(619);
+                if (oldString619 instanceof Utf8) {
+                    charSequence619 = (decoder).readString(((Utf8) oldString619));
+                } else {
+                    charSequence619 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, charSequence619);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F619': "+ unionIndex619));
+            }
+        }
+        int unionIndex620 = (decoder.readIndex());
+        if (unionIndex620 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, null);
+        } else {
+            if (unionIndex620 == 1) {
+                Utf8 charSequence620;
+                Object oldString620 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(620);
+                if (oldString620 instanceof Utf8) {
+                    charSequence620 = (decoder).readString(((Utf8) oldString620));
+                } else {
+                    charSequence620 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, charSequence620);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F620': "+ unionIndex620));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex621 = (decoder.readIndex());
+        if (unionIndex621 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, null);
+        } else {
+            if (unionIndex621 == 1) {
+                Utf8 charSequence621;
+                Object oldString621 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(621);
+                if (oldString621 instanceof Utf8) {
+                    charSequence621 = (decoder).readString(((Utf8) oldString621));
+                } else {
+                    charSequence621 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, charSequence621);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F621': "+ unionIndex621));
+            }
+        }
+        int unionIndex622 = (decoder.readIndex());
+        if (unionIndex622 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, null);
+        } else {
+            if (unionIndex622 == 1) {
+                Utf8 charSequence622;
+                Object oldString622 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(622);
+                if (oldString622 instanceof Utf8) {
+                    charSequence622 = (decoder).readString(((Utf8) oldString622));
+                } else {
+                    charSequence622 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, charSequence622);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F622': "+ unionIndex622));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex623 = (decoder.readIndex());
+        if (unionIndex623 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, null);
+        } else {
+            if (unionIndex623 == 1) {
+                Utf8 charSequence623;
+                Object oldString623 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(623);
+                if (oldString623 instanceof Utf8) {
+                    charSequence623 = (decoder).readString(((Utf8) oldString623));
+                } else {
+                    charSequence623 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, charSequence623);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F623': "+ unionIndex623));
+            }
+        }
+        int unionIndex624 = (decoder.readIndex());
+        if (unionIndex624 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, null);
+        } else {
+            if (unionIndex624 == 1) {
+                Utf8 charSequence624;
+                Object oldString624 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(624);
+                if (oldString624 instanceof Utf8) {
+                    charSequence624 = (decoder).readString(((Utf8) oldString624));
+                } else {
+                    charSequence624 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, charSequence624);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F624': "+ unionIndex624));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex625 = (decoder.readIndex());
+        if (unionIndex625 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, null);
+        } else {
+            if (unionIndex625 == 1) {
+                Utf8 charSequence625;
+                Object oldString625 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(625);
+                if (oldString625 instanceof Utf8) {
+                    charSequence625 = (decoder).readString(((Utf8) oldString625));
+                } else {
+                    charSequence625 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, charSequence625);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F625': "+ unionIndex625));
+            }
+        }
+        int unionIndex626 = (decoder.readIndex());
+        if (unionIndex626 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, null);
+        } else {
+            if (unionIndex626 == 1) {
+                Utf8 charSequence626;
+                Object oldString626 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(626);
+                if (oldString626 instanceof Utf8) {
+                    charSequence626 = (decoder).readString(((Utf8) oldString626));
+                } else {
+                    charSequence626 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, charSequence626);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F626': "+ unionIndex626));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex627 = (decoder.readIndex());
+        if (unionIndex627 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, null);
+        } else {
+            if (unionIndex627 == 1) {
+                Utf8 charSequence627;
+                Object oldString627 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(627);
+                if (oldString627 instanceof Utf8) {
+                    charSequence627 = (decoder).readString(((Utf8) oldString627));
+                } else {
+                    charSequence627 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, charSequence627);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F627': "+ unionIndex627));
+            }
+        }
+        int unionIndex628 = (decoder.readIndex());
+        if (unionIndex628 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, null);
+        } else {
+            if (unionIndex628 == 1) {
+                Utf8 charSequence628;
+                Object oldString628 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(628);
+                if (oldString628 instanceof Utf8) {
+                    charSequence628 = (decoder).readString(((Utf8) oldString628));
+                } else {
+                    charSequence628 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, charSequence628);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F628': "+ unionIndex628));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex629 = (decoder.readIndex());
+        if (unionIndex629 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, null);
+        } else {
+            if (unionIndex629 == 1) {
+                Utf8 charSequence629;
+                Object oldString629 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(629);
+                if (oldString629 instanceof Utf8) {
+                    charSequence629 = (decoder).readString(((Utf8) oldString629));
+                } else {
+                    charSequence629 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, charSequence629);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F629': "+ unionIndex629));
+            }
+        }
+        int unionIndex630 = (decoder.readIndex());
+        if (unionIndex630 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, null);
+        } else {
+            if (unionIndex630 == 1) {
+                Utf8 charSequence630;
+                Object oldString630 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(630);
+                if (oldString630 instanceof Utf8) {
+                    charSequence630 = (decoder).readString(((Utf8) oldString630));
+                } else {
+                    charSequence630 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, charSequence630);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F630': "+ unionIndex630));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex631 = (decoder.readIndex());
+        if (unionIndex631 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, null);
+        } else {
+            if (unionIndex631 == 1) {
+                Utf8 charSequence631;
+                Object oldString631 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(631);
+                if (oldString631 instanceof Utf8) {
+                    charSequence631 = (decoder).readString(((Utf8) oldString631));
+                } else {
+                    charSequence631 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, charSequence631);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F631': "+ unionIndex631));
+            }
+        }
+        int unionIndex632 = (decoder.readIndex());
+        if (unionIndex632 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, null);
+        } else {
+            if (unionIndex632 == 1) {
+                Utf8 charSequence632;
+                Object oldString632 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(632);
+                if (oldString632 instanceof Utf8) {
+                    charSequence632 = (decoder).readString(((Utf8) oldString632));
+                } else {
+                    charSequence632 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, charSequence632);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F632': "+ unionIndex632));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex633 = (decoder.readIndex());
+        if (unionIndex633 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, null);
+        } else {
+            if (unionIndex633 == 1) {
+                Utf8 charSequence633;
+                Object oldString633 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(633);
+                if (oldString633 instanceof Utf8) {
+                    charSequence633 = (decoder).readString(((Utf8) oldString633));
+                } else {
+                    charSequence633 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, charSequence633);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F633': "+ unionIndex633));
+            }
+        }
+        int unionIndex634 = (decoder.readIndex());
+        if (unionIndex634 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, null);
+        } else {
+            if (unionIndex634 == 1) {
+                Utf8 charSequence634;
+                Object oldString634 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(634);
+                if (oldString634 instanceof Utf8) {
+                    charSequence634 = (decoder).readString(((Utf8) oldString634));
+                } else {
+                    charSequence634 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, charSequence634);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F634': "+ unionIndex634));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex635 = (decoder.readIndex());
+        if (unionIndex635 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, null);
+        } else {
+            if (unionIndex635 == 1) {
+                Utf8 charSequence635;
+                Object oldString635 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(635);
+                if (oldString635 instanceof Utf8) {
+                    charSequence635 = (decoder).readString(((Utf8) oldString635));
+                } else {
+                    charSequence635 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, charSequence635);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F635': "+ unionIndex635));
+            }
+        }
+        int unionIndex636 = (decoder.readIndex());
+        if (unionIndex636 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, null);
+        } else {
+            if (unionIndex636 == 1) {
+                Utf8 charSequence636;
+                Object oldString636 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(636);
+                if (oldString636 instanceof Utf8) {
+                    charSequence636 = (decoder).readString(((Utf8) oldString636));
+                } else {
+                    charSequence636 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, charSequence636);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F636': "+ unionIndex636));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex637 = (decoder.readIndex());
+        if (unionIndex637 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, null);
+        } else {
+            if (unionIndex637 == 1) {
+                Utf8 charSequence637;
+                Object oldString637 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(637);
+                if (oldString637 instanceof Utf8) {
+                    charSequence637 = (decoder).readString(((Utf8) oldString637));
+                } else {
+                    charSequence637 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, charSequence637);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F637': "+ unionIndex637));
+            }
+        }
+        int unionIndex638 = (decoder.readIndex());
+        if (unionIndex638 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, null);
+        } else {
+            if (unionIndex638 == 1) {
+                Utf8 charSequence638;
+                Object oldString638 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(638);
+                if (oldString638 instanceof Utf8) {
+                    charSequence638 = (decoder).readString(((Utf8) oldString638));
+                } else {
+                    charSequence638 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, charSequence638);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F638': "+ unionIndex638));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex639 = (decoder.readIndex());
+        if (unionIndex639 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, null);
+        } else {
+            if (unionIndex639 == 1) {
+                Utf8 charSequence639;
+                Object oldString639 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(639);
+                if (oldString639 instanceof Utf8) {
+                    charSequence639 = (decoder).readString(((Utf8) oldString639));
+                } else {
+                    charSequence639 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, charSequence639);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F639': "+ unionIndex639));
+            }
+        }
+        int unionIndex640 = (decoder.readIndex());
+        if (unionIndex640 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, null);
+        } else {
+            if (unionIndex640 == 1) {
+                Utf8 charSequence640;
+                Object oldString640 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(640);
+                if (oldString640 instanceof Utf8) {
+                    charSequence640 = (decoder).readString(((Utf8) oldString640));
+                } else {
+                    charSequence640 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, charSequence640);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F640': "+ unionIndex640));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex641 = (decoder.readIndex());
+        if (unionIndex641 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, null);
+        } else {
+            if (unionIndex641 == 1) {
+                Utf8 charSequence641;
+                Object oldString641 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(641);
+                if (oldString641 instanceof Utf8) {
+                    charSequence641 = (decoder).readString(((Utf8) oldString641));
+                } else {
+                    charSequence641 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, charSequence641);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F641': "+ unionIndex641));
+            }
+        }
+        int unionIndex642 = (decoder.readIndex());
+        if (unionIndex642 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, null);
+        } else {
+            if (unionIndex642 == 1) {
+                Utf8 charSequence642;
+                Object oldString642 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(642);
+                if (oldString642 instanceof Utf8) {
+                    charSequence642 = (decoder).readString(((Utf8) oldString642));
+                } else {
+                    charSequence642 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, charSequence642);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F642': "+ unionIndex642));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex643 = (decoder.readIndex());
+        if (unionIndex643 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, null);
+        } else {
+            if (unionIndex643 == 1) {
+                Utf8 charSequence643;
+                Object oldString643 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(643);
+                if (oldString643 instanceof Utf8) {
+                    charSequence643 = (decoder).readString(((Utf8) oldString643));
+                } else {
+                    charSequence643 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, charSequence643);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F643': "+ unionIndex643));
+            }
+        }
+        int unionIndex644 = (decoder.readIndex());
+        if (unionIndex644 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, null);
+        } else {
+            if (unionIndex644 == 1) {
+                Utf8 charSequence644;
+                Object oldString644 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(644);
+                if (oldString644 instanceof Utf8) {
+                    charSequence644 = (decoder).readString(((Utf8) oldString644));
+                } else {
+                    charSequence644 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, charSequence644);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F644': "+ unionIndex644));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex645 = (decoder.readIndex());
+        if (unionIndex645 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, null);
+        } else {
+            if (unionIndex645 == 1) {
+                Utf8 charSequence645;
+                Object oldString645 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(645);
+                if (oldString645 instanceof Utf8) {
+                    charSequence645 = (decoder).readString(((Utf8) oldString645));
+                } else {
+                    charSequence645 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, charSequence645);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F645': "+ unionIndex645));
+            }
+        }
+        int unionIndex646 = (decoder.readIndex());
+        if (unionIndex646 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, null);
+        } else {
+            if (unionIndex646 == 1) {
+                Utf8 charSequence646;
+                Object oldString646 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(646);
+                if (oldString646 instanceof Utf8) {
+                    charSequence646 = (decoder).readString(((Utf8) oldString646));
+                } else {
+                    charSequence646 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, charSequence646);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F646': "+ unionIndex646));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex647 = (decoder.readIndex());
+        if (unionIndex647 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, null);
+        } else {
+            if (unionIndex647 == 1) {
+                Utf8 charSequence647;
+                Object oldString647 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(647);
+                if (oldString647 instanceof Utf8) {
+                    charSequence647 = (decoder).readString(((Utf8) oldString647));
+                } else {
+                    charSequence647 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, charSequence647);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F647': "+ unionIndex647));
+            }
+        }
+        int unionIndex648 = (decoder.readIndex());
+        if (unionIndex648 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, null);
+        } else {
+            if (unionIndex648 == 1) {
+                Utf8 charSequence648;
+                Object oldString648 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(648);
+                if (oldString648 instanceof Utf8) {
+                    charSequence648 = (decoder).readString(((Utf8) oldString648));
+                } else {
+                    charSequence648 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, charSequence648);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F648': "+ unionIndex648));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex649 = (decoder.readIndex());
+        if (unionIndex649 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, null);
+        } else {
+            if (unionIndex649 == 1) {
+                Utf8 charSequence649;
+                Object oldString649 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(649);
+                if (oldString649 instanceof Utf8) {
+                    charSequence649 = (decoder).readString(((Utf8) oldString649));
+                } else {
+                    charSequence649 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, charSequence649);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F649': "+ unionIndex649));
+            }
+        }
+        int unionIndex650 = (decoder.readIndex());
+        if (unionIndex650 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, null);
+        } else {
+            if (unionIndex650 == 1) {
+                Utf8 charSequence650;
+                Object oldString650 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(650);
+                if (oldString650 instanceof Utf8) {
+                    charSequence650 = (decoder).readString(((Utf8) oldString650));
+                } else {
+                    charSequence650 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, charSequence650);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F650': "+ unionIndex650));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex651 = (decoder.readIndex());
+        if (unionIndex651 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, null);
+        } else {
+            if (unionIndex651 == 1) {
+                Utf8 charSequence651;
+                Object oldString651 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(651);
+                if (oldString651 instanceof Utf8) {
+                    charSequence651 = (decoder).readString(((Utf8) oldString651));
+                } else {
+                    charSequence651 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, charSequence651);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F651': "+ unionIndex651));
+            }
+        }
+        int unionIndex652 = (decoder.readIndex());
+        if (unionIndex652 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, null);
+        } else {
+            if (unionIndex652 == 1) {
+                Utf8 charSequence652;
+                Object oldString652 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(652);
+                if (oldString652 instanceof Utf8) {
+                    charSequence652 = (decoder).readString(((Utf8) oldString652));
+                } else {
+                    charSequence652 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, charSequence652);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F652': "+ unionIndex652));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex653 = (decoder.readIndex());
+        if (unionIndex653 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, null);
+        } else {
+            if (unionIndex653 == 1) {
+                Utf8 charSequence653;
+                Object oldString653 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(653);
+                if (oldString653 instanceof Utf8) {
+                    charSequence653 = (decoder).readString(((Utf8) oldString653));
+                } else {
+                    charSequence653 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, charSequence653);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F653': "+ unionIndex653));
+            }
+        }
+        int unionIndex654 = (decoder.readIndex());
+        if (unionIndex654 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, null);
+        } else {
+            if (unionIndex654 == 1) {
+                Utf8 charSequence654;
+                Object oldString654 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(654);
+                if (oldString654 instanceof Utf8) {
+                    charSequence654 = (decoder).readString(((Utf8) oldString654));
+                } else {
+                    charSequence654 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, charSequence654);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F654': "+ unionIndex654));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex655 = (decoder.readIndex());
+        if (unionIndex655 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, null);
+        } else {
+            if (unionIndex655 == 1) {
+                Utf8 charSequence655;
+                Object oldString655 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(655);
+                if (oldString655 instanceof Utf8) {
+                    charSequence655 = (decoder).readString(((Utf8) oldString655));
+                } else {
+                    charSequence655 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, charSequence655);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F655': "+ unionIndex655));
+            }
+        }
+        int unionIndex656 = (decoder.readIndex());
+        if (unionIndex656 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, null);
+        } else {
+            if (unionIndex656 == 1) {
+                Utf8 charSequence656;
+                Object oldString656 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(656);
+                if (oldString656 instanceof Utf8) {
+                    charSequence656 = (decoder).readString(((Utf8) oldString656));
+                } else {
+                    charSequence656 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, charSequence656);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F656': "+ unionIndex656));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex657 = (decoder.readIndex());
+        if (unionIndex657 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, null);
+        } else {
+            if (unionIndex657 == 1) {
+                Utf8 charSequence657;
+                Object oldString657 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(657);
+                if (oldString657 instanceof Utf8) {
+                    charSequence657 = (decoder).readString(((Utf8) oldString657));
+                } else {
+                    charSequence657 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, charSequence657);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F657': "+ unionIndex657));
+            }
+        }
+        int unionIndex658 = (decoder.readIndex());
+        if (unionIndex658 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, null);
+        } else {
+            if (unionIndex658 == 1) {
+                Utf8 charSequence658;
+                Object oldString658 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(658);
+                if (oldString658 instanceof Utf8) {
+                    charSequence658 = (decoder).readString(((Utf8) oldString658));
+                } else {
+                    charSequence658 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, charSequence658);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F658': "+ unionIndex658));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex659 = (decoder.readIndex());
+        if (unionIndex659 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, null);
+        } else {
+            if (unionIndex659 == 1) {
+                Utf8 charSequence659;
+                Object oldString659 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(659);
+                if (oldString659 instanceof Utf8) {
+                    charSequence659 = (decoder).readString(((Utf8) oldString659));
+                } else {
+                    charSequence659 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, charSequence659);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F659': "+ unionIndex659));
+            }
+        }
+        int unionIndex660 = (decoder.readIndex());
+        if (unionIndex660 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, null);
+        } else {
+            if (unionIndex660 == 1) {
+                Utf8 charSequence660;
+                Object oldString660 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(660);
+                if (oldString660 instanceof Utf8) {
+                    charSequence660 = (decoder).readString(((Utf8) oldString660));
+                } else {
+                    charSequence660 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, charSequence660);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F660': "+ unionIndex660));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex661 = (decoder.readIndex());
+        if (unionIndex661 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, null);
+        } else {
+            if (unionIndex661 == 1) {
+                Utf8 charSequence661;
+                Object oldString661 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(661);
+                if (oldString661 instanceof Utf8) {
+                    charSequence661 = (decoder).readString(((Utf8) oldString661));
+                } else {
+                    charSequence661 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, charSequence661);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F661': "+ unionIndex661));
+            }
+        }
+        int unionIndex662 = (decoder.readIndex());
+        if (unionIndex662 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, null);
+        } else {
+            if (unionIndex662 == 1) {
+                Utf8 charSequence662;
+                Object oldString662 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(662);
+                if (oldString662 instanceof Utf8) {
+                    charSequence662 = (decoder).readString(((Utf8) oldString662));
+                } else {
+                    charSequence662 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, charSequence662);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F662': "+ unionIndex662));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex663 = (decoder.readIndex());
+        if (unionIndex663 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, null);
+        } else {
+            if (unionIndex663 == 1) {
+                Utf8 charSequence663;
+                Object oldString663 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(663);
+                if (oldString663 instanceof Utf8) {
+                    charSequence663 = (decoder).readString(((Utf8) oldString663));
+                } else {
+                    charSequence663 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, charSequence663);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F663': "+ unionIndex663));
+            }
+        }
+        int unionIndex664 = (decoder.readIndex());
+        if (unionIndex664 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, null);
+        } else {
+            if (unionIndex664 == 1) {
+                Utf8 charSequence664;
+                Object oldString664 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(664);
+                if (oldString664 instanceof Utf8) {
+                    charSequence664 = (decoder).readString(((Utf8) oldString664));
+                } else {
+                    charSequence664 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, charSequence664);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F664': "+ unionIndex664));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex665 = (decoder.readIndex());
+        if (unionIndex665 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, null);
+        } else {
+            if (unionIndex665 == 1) {
+                Utf8 charSequence665;
+                Object oldString665 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(665);
+                if (oldString665 instanceof Utf8) {
+                    charSequence665 = (decoder).readString(((Utf8) oldString665));
+                } else {
+                    charSequence665 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, charSequence665);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F665': "+ unionIndex665));
+            }
+        }
+        int unionIndex666 = (decoder.readIndex());
+        if (unionIndex666 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, null);
+        } else {
+            if (unionIndex666 == 1) {
+                Utf8 charSequence666;
+                Object oldString666 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(666);
+                if (oldString666 instanceof Utf8) {
+                    charSequence666 = (decoder).readString(((Utf8) oldString666));
+                } else {
+                    charSequence666 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, charSequence666);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F666': "+ unionIndex666));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex667 = (decoder.readIndex());
+        if (unionIndex667 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, null);
+        } else {
+            if (unionIndex667 == 1) {
+                Utf8 charSequence667;
+                Object oldString667 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(667);
+                if (oldString667 instanceof Utf8) {
+                    charSequence667 = (decoder).readString(((Utf8) oldString667));
+                } else {
+                    charSequence667 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, charSequence667);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F667': "+ unionIndex667));
+            }
+        }
+        int unionIndex668 = (decoder.readIndex());
+        if (unionIndex668 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, null);
+        } else {
+            if (unionIndex668 == 1) {
+                Utf8 charSequence668;
+                Object oldString668 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(668);
+                if (oldString668 instanceof Utf8) {
+                    charSequence668 = (decoder).readString(((Utf8) oldString668));
+                } else {
+                    charSequence668 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, charSequence668);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F668': "+ unionIndex668));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex669 = (decoder.readIndex());
+        if (unionIndex669 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, null);
+        } else {
+            if (unionIndex669 == 1) {
+                Utf8 charSequence669;
+                Object oldString669 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(669);
+                if (oldString669 instanceof Utf8) {
+                    charSequence669 = (decoder).readString(((Utf8) oldString669));
+                } else {
+                    charSequence669 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, charSequence669);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F669': "+ unionIndex669));
+            }
+        }
+        int unionIndex670 = (decoder.readIndex());
+        if (unionIndex670 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, null);
+        } else {
+            if (unionIndex670 == 1) {
+                Utf8 charSequence670;
+                Object oldString670 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(670);
+                if (oldString670 instanceof Utf8) {
+                    charSequence670 = (decoder).readString(((Utf8) oldString670));
+                } else {
+                    charSequence670 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, charSequence670);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F670': "+ unionIndex670));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex671 = (decoder.readIndex());
+        if (unionIndex671 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, null);
+        } else {
+            if (unionIndex671 == 1) {
+                Utf8 charSequence671;
+                Object oldString671 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(671);
+                if (oldString671 instanceof Utf8) {
+                    charSequence671 = (decoder).readString(((Utf8) oldString671));
+                } else {
+                    charSequence671 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, charSequence671);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F671': "+ unionIndex671));
+            }
+        }
+        int unionIndex672 = (decoder.readIndex());
+        if (unionIndex672 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, null);
+        } else {
+            if (unionIndex672 == 1) {
+                Utf8 charSequence672;
+                Object oldString672 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(672);
+                if (oldString672 instanceof Utf8) {
+                    charSequence672 = (decoder).readString(((Utf8) oldString672));
+                } else {
+                    charSequence672 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, charSequence672);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F672': "+ unionIndex672));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex673 = (decoder.readIndex());
+        if (unionIndex673 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, null);
+        } else {
+            if (unionIndex673 == 1) {
+                Utf8 charSequence673;
+                Object oldString673 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(673);
+                if (oldString673 instanceof Utf8) {
+                    charSequence673 = (decoder).readString(((Utf8) oldString673));
+                } else {
+                    charSequence673 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, charSequence673);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F673': "+ unionIndex673));
+            }
+        }
+        int unionIndex674 = (decoder.readIndex());
+        if (unionIndex674 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, null);
+        } else {
+            if (unionIndex674 == 1) {
+                Utf8 charSequence674;
+                Object oldString674 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(674);
+                if (oldString674 instanceof Utf8) {
+                    charSequence674 = (decoder).readString(((Utf8) oldString674));
+                } else {
+                    charSequence674 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, charSequence674);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F674': "+ unionIndex674));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex675 = (decoder.readIndex());
+        if (unionIndex675 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, null);
+        } else {
+            if (unionIndex675 == 1) {
+                Utf8 charSequence675;
+                Object oldString675 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(675);
+                if (oldString675 instanceof Utf8) {
+                    charSequence675 = (decoder).readString(((Utf8) oldString675));
+                } else {
+                    charSequence675 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, charSequence675);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F675': "+ unionIndex675));
+            }
+        }
+        int unionIndex676 = (decoder.readIndex());
+        if (unionIndex676 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, null);
+        } else {
+            if (unionIndex676 == 1) {
+                Utf8 charSequence676;
+                Object oldString676 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(676);
+                if (oldString676 instanceof Utf8) {
+                    charSequence676 = (decoder).readString(((Utf8) oldString676));
+                } else {
+                    charSequence676 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, charSequence676);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F676': "+ unionIndex676));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex677 = (decoder.readIndex());
+        if (unionIndex677 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, null);
+        } else {
+            if (unionIndex677 == 1) {
+                Utf8 charSequence677;
+                Object oldString677 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(677);
+                if (oldString677 instanceof Utf8) {
+                    charSequence677 = (decoder).readString(((Utf8) oldString677));
+                } else {
+                    charSequence677 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, charSequence677);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F677': "+ unionIndex677));
+            }
+        }
+        int unionIndex678 = (decoder.readIndex());
+        if (unionIndex678 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, null);
+        } else {
+            if (unionIndex678 == 1) {
+                Utf8 charSequence678;
+                Object oldString678 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(678);
+                if (oldString678 instanceof Utf8) {
+                    charSequence678 = (decoder).readString(((Utf8) oldString678));
+                } else {
+                    charSequence678 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, charSequence678);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F678': "+ unionIndex678));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex679 = (decoder.readIndex());
+        if (unionIndex679 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, null);
+        } else {
+            if (unionIndex679 == 1) {
+                Utf8 charSequence679;
+                Object oldString679 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(679);
+                if (oldString679 instanceof Utf8) {
+                    charSequence679 = (decoder).readString(((Utf8) oldString679));
+                } else {
+                    charSequence679 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, charSequence679);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F679': "+ unionIndex679));
+            }
+        }
+        int unionIndex680 = (decoder.readIndex());
+        if (unionIndex680 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, null);
+        } else {
+            if (unionIndex680 == 1) {
+                Utf8 charSequence680;
+                Object oldString680 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(680);
+                if (oldString680 instanceof Utf8) {
+                    charSequence680 = (decoder).readString(((Utf8) oldString680));
+                } else {
+                    charSequence680 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, charSequence680);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F680': "+ unionIndex680));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex681 = (decoder.readIndex());
+        if (unionIndex681 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, null);
+        } else {
+            if (unionIndex681 == 1) {
+                Utf8 charSequence681;
+                Object oldString681 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(681);
+                if (oldString681 instanceof Utf8) {
+                    charSequence681 = (decoder).readString(((Utf8) oldString681));
+                } else {
+                    charSequence681 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, charSequence681);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F681': "+ unionIndex681));
+            }
+        }
+        int unionIndex682 = (decoder.readIndex());
+        if (unionIndex682 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, null);
+        } else {
+            if (unionIndex682 == 1) {
+                Utf8 charSequence682;
+                Object oldString682 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(682);
+                if (oldString682 instanceof Utf8) {
+                    charSequence682 = (decoder).readString(((Utf8) oldString682));
+                } else {
+                    charSequence682 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, charSequence682);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F682': "+ unionIndex682));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex683 = (decoder.readIndex());
+        if (unionIndex683 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, null);
+        } else {
+            if (unionIndex683 == 1) {
+                Utf8 charSequence683;
+                Object oldString683 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(683);
+                if (oldString683 instanceof Utf8) {
+                    charSequence683 = (decoder).readString(((Utf8) oldString683));
+                } else {
+                    charSequence683 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, charSequence683);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F683': "+ unionIndex683));
+            }
+        }
+        int unionIndex684 = (decoder.readIndex());
+        if (unionIndex684 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, null);
+        } else {
+            if (unionIndex684 == 1) {
+                Utf8 charSequence684;
+                Object oldString684 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(684);
+                if (oldString684 instanceof Utf8) {
+                    charSequence684 = (decoder).readString(((Utf8) oldString684));
+                } else {
+                    charSequence684 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, charSequence684);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F684': "+ unionIndex684));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex685 = (decoder.readIndex());
+        if (unionIndex685 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, null);
+        } else {
+            if (unionIndex685 == 1) {
+                Utf8 charSequence685;
+                Object oldString685 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(685);
+                if (oldString685 instanceof Utf8) {
+                    charSequence685 = (decoder).readString(((Utf8) oldString685));
+                } else {
+                    charSequence685 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, charSequence685);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F685': "+ unionIndex685));
+            }
+        }
+        int unionIndex686 = (decoder.readIndex());
+        if (unionIndex686 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, null);
+        } else {
+            if (unionIndex686 == 1) {
+                Utf8 charSequence686;
+                Object oldString686 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(686);
+                if (oldString686 instanceof Utf8) {
+                    charSequence686 = (decoder).readString(((Utf8) oldString686));
+                } else {
+                    charSequence686 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, charSequence686);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F686': "+ unionIndex686));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex687 = (decoder.readIndex());
+        if (unionIndex687 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, null);
+        } else {
+            if (unionIndex687 == 1) {
+                Utf8 charSequence687;
+                Object oldString687 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(687);
+                if (oldString687 instanceof Utf8) {
+                    charSequence687 = (decoder).readString(((Utf8) oldString687));
+                } else {
+                    charSequence687 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, charSequence687);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F687': "+ unionIndex687));
+            }
+        }
+        int unionIndex688 = (decoder.readIndex());
+        if (unionIndex688 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, null);
+        } else {
+            if (unionIndex688 == 1) {
+                Utf8 charSequence688;
+                Object oldString688 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(688);
+                if (oldString688 instanceof Utf8) {
+                    charSequence688 = (decoder).readString(((Utf8) oldString688));
+                } else {
+                    charSequence688 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, charSequence688);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F688': "+ unionIndex688));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex689 = (decoder.readIndex());
+        if (unionIndex689 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, null);
+        } else {
+            if (unionIndex689 == 1) {
+                Utf8 charSequence689;
+                Object oldString689 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(689);
+                if (oldString689 instanceof Utf8) {
+                    charSequence689 = (decoder).readString(((Utf8) oldString689));
+                } else {
+                    charSequence689 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, charSequence689);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F689': "+ unionIndex689));
+            }
+        }
+        int unionIndex690 = (decoder.readIndex());
+        if (unionIndex690 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, null);
+        } else {
+            if (unionIndex690 == 1) {
+                Utf8 charSequence690;
+                Object oldString690 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(690);
+                if (oldString690 instanceof Utf8) {
+                    charSequence690 = (decoder).readString(((Utf8) oldString690));
+                } else {
+                    charSequence690 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, charSequence690);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F690': "+ unionIndex690));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex691 = (decoder.readIndex());
+        if (unionIndex691 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, null);
+        } else {
+            if (unionIndex691 == 1) {
+                Utf8 charSequence691;
+                Object oldString691 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(691);
+                if (oldString691 instanceof Utf8) {
+                    charSequence691 = (decoder).readString(((Utf8) oldString691));
+                } else {
+                    charSequence691 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, charSequence691);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F691': "+ unionIndex691));
+            }
+        }
+        int unionIndex692 = (decoder.readIndex());
+        if (unionIndex692 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, null);
+        } else {
+            if (unionIndex692 == 1) {
+                Utf8 charSequence692;
+                Object oldString692 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(692);
+                if (oldString692 instanceof Utf8) {
+                    charSequence692 = (decoder).readString(((Utf8) oldString692));
+                } else {
+                    charSequence692 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, charSequence692);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F692': "+ unionIndex692));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex693 = (decoder.readIndex());
+        if (unionIndex693 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, null);
+        } else {
+            if (unionIndex693 == 1) {
+                Utf8 charSequence693;
+                Object oldString693 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(693);
+                if (oldString693 instanceof Utf8) {
+                    charSequence693 = (decoder).readString(((Utf8) oldString693));
+                } else {
+                    charSequence693 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, charSequence693);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F693': "+ unionIndex693));
+            }
+        }
+        int unionIndex694 = (decoder.readIndex());
+        if (unionIndex694 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, null);
+        } else {
+            if (unionIndex694 == 1) {
+                Utf8 charSequence694;
+                Object oldString694 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(694);
+                if (oldString694 instanceof Utf8) {
+                    charSequence694 = (decoder).readString(((Utf8) oldString694));
+                } else {
+                    charSequence694 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, charSequence694);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F694': "+ unionIndex694));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex695 = (decoder.readIndex());
+        if (unionIndex695 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, null);
+        } else {
+            if (unionIndex695 == 1) {
+                Utf8 charSequence695;
+                Object oldString695 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(695);
+                if (oldString695 instanceof Utf8) {
+                    charSequence695 = (decoder).readString(((Utf8) oldString695));
+                } else {
+                    charSequence695 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, charSequence695);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F695': "+ unionIndex695));
+            }
+        }
+        int unionIndex696 = (decoder.readIndex());
+        if (unionIndex696 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, null);
+        } else {
+            if (unionIndex696 == 1) {
+                Utf8 charSequence696;
+                Object oldString696 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(696);
+                if (oldString696 instanceof Utf8) {
+                    charSequence696 = (decoder).readString(((Utf8) oldString696));
+                } else {
+                    charSequence696 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, charSequence696);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F696': "+ unionIndex696));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex697 = (decoder.readIndex());
+        if (unionIndex697 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, null);
+        } else {
+            if (unionIndex697 == 1) {
+                Utf8 charSequence697;
+                Object oldString697 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(697);
+                if (oldString697 instanceof Utf8) {
+                    charSequence697 = (decoder).readString(((Utf8) oldString697));
+                } else {
+                    charSequence697 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, charSequence697);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F697': "+ unionIndex697));
+            }
+        }
+        int unionIndex698 = (decoder.readIndex());
+        if (unionIndex698 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, null);
+        } else {
+            if (unionIndex698 == 1) {
+                Utf8 charSequence698;
+                Object oldString698 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(698);
+                if (oldString698 instanceof Utf8) {
+                    charSequence698 = (decoder).readString(((Utf8) oldString698));
+                } else {
+                    charSequence698 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, charSequence698);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F698': "+ unionIndex698));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex699 = (decoder.readIndex());
+        if (unionIndex699 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, null);
+        } else {
+            if (unionIndex699 == 1) {
+                Utf8 charSequence699;
+                Object oldString699 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(699);
+                if (oldString699 instanceof Utf8) {
+                    charSequence699 = (decoder).readString(((Utf8) oldString699));
+                } else {
+                    charSequence699 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, charSequence699);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F699': "+ unionIndex699));
+            }
+        }
+        int unionIndex700 = (decoder.readIndex());
+        if (unionIndex700 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, null);
+        } else {
+            if (unionIndex700 == 1) {
+                Utf8 charSequence700;
+                Object oldString700 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(700);
+                if (oldString700 instanceof Utf8) {
+                    charSequence700 = (decoder).readString(((Utf8) oldString700));
+                } else {
+                    charSequence700 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, charSequence700);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F700': "+ unionIndex700));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex701 = (decoder.readIndex());
+        if (unionIndex701 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, null);
+        } else {
+            if (unionIndex701 == 1) {
+                Utf8 charSequence701;
+                Object oldString701 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(701);
+                if (oldString701 instanceof Utf8) {
+                    charSequence701 = (decoder).readString(((Utf8) oldString701));
+                } else {
+                    charSequence701 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, charSequence701);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F701': "+ unionIndex701));
+            }
+        }
+        int unionIndex702 = (decoder.readIndex());
+        if (unionIndex702 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, null);
+        } else {
+            if (unionIndex702 == 1) {
+                Utf8 charSequence702;
+                Object oldString702 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(702);
+                if (oldString702 instanceof Utf8) {
+                    charSequence702 = (decoder).readString(((Utf8) oldString702));
+                } else {
+                    charSequence702 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, charSequence702);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F702': "+ unionIndex702));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex703 = (decoder.readIndex());
+        if (unionIndex703 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, null);
+        } else {
+            if (unionIndex703 == 1) {
+                Utf8 charSequence703;
+                Object oldString703 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(703);
+                if (oldString703 instanceof Utf8) {
+                    charSequence703 = (decoder).readString(((Utf8) oldString703));
+                } else {
+                    charSequence703 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, charSequence703);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F703': "+ unionIndex703));
+            }
+        }
+        int unionIndex704 = (decoder.readIndex());
+        if (unionIndex704 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, null);
+        } else {
+            if (unionIndex704 == 1) {
+                Utf8 charSequence704;
+                Object oldString704 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(704);
+                if (oldString704 instanceof Utf8) {
+                    charSequence704 = (decoder).readString(((Utf8) oldString704));
+                } else {
+                    charSequence704 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, charSequence704);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F704': "+ unionIndex704));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex705 = (decoder.readIndex());
+        if (unionIndex705 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, null);
+        } else {
+            if (unionIndex705 == 1) {
+                Utf8 charSequence705;
+                Object oldString705 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(705);
+                if (oldString705 instanceof Utf8) {
+                    charSequence705 = (decoder).readString(((Utf8) oldString705));
+                } else {
+                    charSequence705 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, charSequence705);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F705': "+ unionIndex705));
+            }
+        }
+        int unionIndex706 = (decoder.readIndex());
+        if (unionIndex706 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, null);
+        } else {
+            if (unionIndex706 == 1) {
+                Utf8 charSequence706;
+                Object oldString706 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(706);
+                if (oldString706 instanceof Utf8) {
+                    charSequence706 = (decoder).readString(((Utf8) oldString706));
+                } else {
+                    charSequence706 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, charSequence706);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F706': "+ unionIndex706));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex707 = (decoder.readIndex());
+        if (unionIndex707 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, null);
+        } else {
+            if (unionIndex707 == 1) {
+                Utf8 charSequence707;
+                Object oldString707 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(707);
+                if (oldString707 instanceof Utf8) {
+                    charSequence707 = (decoder).readString(((Utf8) oldString707));
+                } else {
+                    charSequence707 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, charSequence707);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F707': "+ unionIndex707));
+            }
+        }
+        int unionIndex708 = (decoder.readIndex());
+        if (unionIndex708 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, null);
+        } else {
+            if (unionIndex708 == 1) {
+                Utf8 charSequence708;
+                Object oldString708 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(708);
+                if (oldString708 instanceof Utf8) {
+                    charSequence708 = (decoder).readString(((Utf8) oldString708));
+                } else {
+                    charSequence708 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, charSequence708);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F708': "+ unionIndex708));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex709 = (decoder.readIndex());
+        if (unionIndex709 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, null);
+        } else {
+            if (unionIndex709 == 1) {
+                Utf8 charSequence709;
+                Object oldString709 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(709);
+                if (oldString709 instanceof Utf8) {
+                    charSequence709 = (decoder).readString(((Utf8) oldString709));
+                } else {
+                    charSequence709 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, charSequence709);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F709': "+ unionIndex709));
+            }
+        }
+        int unionIndex710 = (decoder.readIndex());
+        if (unionIndex710 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, null);
+        } else {
+            if (unionIndex710 == 1) {
+                Utf8 charSequence710;
+                Object oldString710 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(710);
+                if (oldString710 instanceof Utf8) {
+                    charSequence710 = (decoder).readString(((Utf8) oldString710));
+                } else {
+                    charSequence710 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, charSequence710);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F710': "+ unionIndex710));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex711 = (decoder.readIndex());
+        if (unionIndex711 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, null);
+        } else {
+            if (unionIndex711 == 1) {
+                Utf8 charSequence711;
+                Object oldString711 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(711);
+                if (oldString711 instanceof Utf8) {
+                    charSequence711 = (decoder).readString(((Utf8) oldString711));
+                } else {
+                    charSequence711 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, charSequence711);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F711': "+ unionIndex711));
+            }
+        }
+        int unionIndex712 = (decoder.readIndex());
+        if (unionIndex712 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, null);
+        } else {
+            if (unionIndex712 == 1) {
+                Utf8 charSequence712;
+                Object oldString712 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(712);
+                if (oldString712 instanceof Utf8) {
+                    charSequence712 = (decoder).readString(((Utf8) oldString712));
+                } else {
+                    charSequence712 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, charSequence712);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F712': "+ unionIndex712));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex713 = (decoder.readIndex());
+        if (unionIndex713 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, null);
+        } else {
+            if (unionIndex713 == 1) {
+                Utf8 charSequence713;
+                Object oldString713 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(713);
+                if (oldString713 instanceof Utf8) {
+                    charSequence713 = (decoder).readString(((Utf8) oldString713));
+                } else {
+                    charSequence713 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, charSequence713);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F713': "+ unionIndex713));
+            }
+        }
+        int unionIndex714 = (decoder.readIndex());
+        if (unionIndex714 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, null);
+        } else {
+            if (unionIndex714 == 1) {
+                Utf8 charSequence714;
+                Object oldString714 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(714);
+                if (oldString714 instanceof Utf8) {
+                    charSequence714 = (decoder).readString(((Utf8) oldString714));
+                } else {
+                    charSequence714 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, charSequence714);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F714': "+ unionIndex714));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex715 = (decoder.readIndex());
+        if (unionIndex715 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, null);
+        } else {
+            if (unionIndex715 == 1) {
+                Utf8 charSequence715;
+                Object oldString715 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(715);
+                if (oldString715 instanceof Utf8) {
+                    charSequence715 = (decoder).readString(((Utf8) oldString715));
+                } else {
+                    charSequence715 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, charSequence715);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F715': "+ unionIndex715));
+            }
+        }
+        int unionIndex716 = (decoder.readIndex());
+        if (unionIndex716 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, null);
+        } else {
+            if (unionIndex716 == 1) {
+                Utf8 charSequence716;
+                Object oldString716 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(716);
+                if (oldString716 instanceof Utf8) {
+                    charSequence716 = (decoder).readString(((Utf8) oldString716));
+                } else {
+                    charSequence716 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, charSequence716);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F716': "+ unionIndex716));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex717 = (decoder.readIndex());
+        if (unionIndex717 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, null);
+        } else {
+            if (unionIndex717 == 1) {
+                Utf8 charSequence717;
+                Object oldString717 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(717);
+                if (oldString717 instanceof Utf8) {
+                    charSequence717 = (decoder).readString(((Utf8) oldString717));
+                } else {
+                    charSequence717 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, charSequence717);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F717': "+ unionIndex717));
+            }
+        }
+        int unionIndex718 = (decoder.readIndex());
+        if (unionIndex718 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, null);
+        } else {
+            if (unionIndex718 == 1) {
+                Utf8 charSequence718;
+                Object oldString718 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(718);
+                if (oldString718 instanceof Utf8) {
+                    charSequence718 = (decoder).readString(((Utf8) oldString718));
+                } else {
+                    charSequence718 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, charSequence718);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F718': "+ unionIndex718));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex719 = (decoder.readIndex());
+        if (unionIndex719 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, null);
+        } else {
+            if (unionIndex719 == 1) {
+                Utf8 charSequence719;
+                Object oldString719 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(719);
+                if (oldString719 instanceof Utf8) {
+                    charSequence719 = (decoder).readString(((Utf8) oldString719));
+                } else {
+                    charSequence719 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, charSequence719);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F719': "+ unionIndex719));
+            }
+        }
+        int unionIndex720 = (decoder.readIndex());
+        if (unionIndex720 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, null);
+        } else {
+            if (unionIndex720 == 1) {
+                Utf8 charSequence720;
+                Object oldString720 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(720);
+                if (oldString720 instanceof Utf8) {
+                    charSequence720 = (decoder).readString(((Utf8) oldString720));
+                } else {
+                    charSequence720 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, charSequence720);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F720': "+ unionIndex720));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex721 = (decoder.readIndex());
+        if (unionIndex721 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, null);
+        } else {
+            if (unionIndex721 == 1) {
+                Utf8 charSequence721;
+                Object oldString721 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(721);
+                if (oldString721 instanceof Utf8) {
+                    charSequence721 = (decoder).readString(((Utf8) oldString721));
+                } else {
+                    charSequence721 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, charSequence721);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F721': "+ unionIndex721));
+            }
+        }
+        int unionIndex722 = (decoder.readIndex());
+        if (unionIndex722 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, null);
+        } else {
+            if (unionIndex722 == 1) {
+                Utf8 charSequence722;
+                Object oldString722 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(722);
+                if (oldString722 instanceof Utf8) {
+                    charSequence722 = (decoder).readString(((Utf8) oldString722));
+                } else {
+                    charSequence722 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, charSequence722);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F722': "+ unionIndex722));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex723 = (decoder.readIndex());
+        if (unionIndex723 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, null);
+        } else {
+            if (unionIndex723 == 1) {
+                Utf8 charSequence723;
+                Object oldString723 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(723);
+                if (oldString723 instanceof Utf8) {
+                    charSequence723 = (decoder).readString(((Utf8) oldString723));
+                } else {
+                    charSequence723 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, charSequence723);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F723': "+ unionIndex723));
+            }
+        }
+        int unionIndex724 = (decoder.readIndex());
+        if (unionIndex724 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, null);
+        } else {
+            if (unionIndex724 == 1) {
+                Utf8 charSequence724;
+                Object oldString724 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(724);
+                if (oldString724 instanceof Utf8) {
+                    charSequence724 = (decoder).readString(((Utf8) oldString724));
+                } else {
+                    charSequence724 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, charSequence724);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F724': "+ unionIndex724));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex725 = (decoder.readIndex());
+        if (unionIndex725 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, null);
+        } else {
+            if (unionIndex725 == 1) {
+                Utf8 charSequence725;
+                Object oldString725 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(725);
+                if (oldString725 instanceof Utf8) {
+                    charSequence725 = (decoder).readString(((Utf8) oldString725));
+                } else {
+                    charSequence725 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, charSequence725);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F725': "+ unionIndex725));
+            }
+        }
+        int unionIndex726 = (decoder.readIndex());
+        if (unionIndex726 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, null);
+        } else {
+            if (unionIndex726 == 1) {
+                Utf8 charSequence726;
+                Object oldString726 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(726);
+                if (oldString726 instanceof Utf8) {
+                    charSequence726 = (decoder).readString(((Utf8) oldString726));
+                } else {
+                    charSequence726 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, charSequence726);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F726': "+ unionIndex726));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex727 = (decoder.readIndex());
+        if (unionIndex727 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, null);
+        } else {
+            if (unionIndex727 == 1) {
+                Utf8 charSequence727;
+                Object oldString727 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(727);
+                if (oldString727 instanceof Utf8) {
+                    charSequence727 = (decoder).readString(((Utf8) oldString727));
+                } else {
+                    charSequence727 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, charSequence727);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F727': "+ unionIndex727));
+            }
+        }
+        int unionIndex728 = (decoder.readIndex());
+        if (unionIndex728 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, null);
+        } else {
+            if (unionIndex728 == 1) {
+                Utf8 charSequence728;
+                Object oldString728 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(728);
+                if (oldString728 instanceof Utf8) {
+                    charSequence728 = (decoder).readString(((Utf8) oldString728));
+                } else {
+                    charSequence728 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, charSequence728);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F728': "+ unionIndex728));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex729 = (decoder.readIndex());
+        if (unionIndex729 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, null);
+        } else {
+            if (unionIndex729 == 1) {
+                Utf8 charSequence729;
+                Object oldString729 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(729);
+                if (oldString729 instanceof Utf8) {
+                    charSequence729 = (decoder).readString(((Utf8) oldString729));
+                } else {
+                    charSequence729 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, charSequence729);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F729': "+ unionIndex729));
+            }
+        }
+        int unionIndex730 = (decoder.readIndex());
+        if (unionIndex730 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, null);
+        } else {
+            if (unionIndex730 == 1) {
+                Utf8 charSequence730;
+                Object oldString730 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(730);
+                if (oldString730 instanceof Utf8) {
+                    charSequence730 = (decoder).readString(((Utf8) oldString730));
+                } else {
+                    charSequence730 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, charSequence730);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F730': "+ unionIndex730));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex731 = (decoder.readIndex());
+        if (unionIndex731 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, null);
+        } else {
+            if (unionIndex731 == 1) {
+                Utf8 charSequence731;
+                Object oldString731 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(731);
+                if (oldString731 instanceof Utf8) {
+                    charSequence731 = (decoder).readString(((Utf8) oldString731));
+                } else {
+                    charSequence731 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, charSequence731);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F731': "+ unionIndex731));
+            }
+        }
+        int unionIndex732 = (decoder.readIndex());
+        if (unionIndex732 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, null);
+        } else {
+            if (unionIndex732 == 1) {
+                Utf8 charSequence732;
+                Object oldString732 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(732);
+                if (oldString732 instanceof Utf8) {
+                    charSequence732 = (decoder).readString(((Utf8) oldString732));
+                } else {
+                    charSequence732 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, charSequence732);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F732': "+ unionIndex732));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex733 = (decoder.readIndex());
+        if (unionIndex733 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, null);
+        } else {
+            if (unionIndex733 == 1) {
+                Utf8 charSequence733;
+                Object oldString733 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(733);
+                if (oldString733 instanceof Utf8) {
+                    charSequence733 = (decoder).readString(((Utf8) oldString733));
+                } else {
+                    charSequence733 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, charSequence733);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F733': "+ unionIndex733));
+            }
+        }
+        int unionIndex734 = (decoder.readIndex());
+        if (unionIndex734 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, null);
+        } else {
+            if (unionIndex734 == 1) {
+                Utf8 charSequence734;
+                Object oldString734 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(734);
+                if (oldString734 instanceof Utf8) {
+                    charSequence734 = (decoder).readString(((Utf8) oldString734));
+                } else {
+                    charSequence734 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, charSequence734);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F734': "+ unionIndex734));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex735 = (decoder.readIndex());
+        if (unionIndex735 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, null);
+        } else {
+            if (unionIndex735 == 1) {
+                Utf8 charSequence735;
+                Object oldString735 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(735);
+                if (oldString735 instanceof Utf8) {
+                    charSequence735 = (decoder).readString(((Utf8) oldString735));
+                } else {
+                    charSequence735 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, charSequence735);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F735': "+ unionIndex735));
+            }
+        }
+        int unionIndex736 = (decoder.readIndex());
+        if (unionIndex736 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, null);
+        } else {
+            if (unionIndex736 == 1) {
+                Utf8 charSequence736;
+                Object oldString736 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(736);
+                if (oldString736 instanceof Utf8) {
+                    charSequence736 = (decoder).readString(((Utf8) oldString736));
+                } else {
+                    charSequence736 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, charSequence736);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F736': "+ unionIndex736));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex737 = (decoder.readIndex());
+        if (unionIndex737 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, null);
+        } else {
+            if (unionIndex737 == 1) {
+                Utf8 charSequence737;
+                Object oldString737 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(737);
+                if (oldString737 instanceof Utf8) {
+                    charSequence737 = (decoder).readString(((Utf8) oldString737));
+                } else {
+                    charSequence737 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, charSequence737);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F737': "+ unionIndex737));
+            }
+        }
+        int unionIndex738 = (decoder.readIndex());
+        if (unionIndex738 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, null);
+        } else {
+            if (unionIndex738 == 1) {
+                Utf8 charSequence738;
+                Object oldString738 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(738);
+                if (oldString738 instanceof Utf8) {
+                    charSequence738 = (decoder).readString(((Utf8) oldString738));
+                } else {
+                    charSequence738 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, charSequence738);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F738': "+ unionIndex738));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex739 = (decoder.readIndex());
+        if (unionIndex739 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, null);
+        } else {
+            if (unionIndex739 == 1) {
+                Utf8 charSequence739;
+                Object oldString739 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(739);
+                if (oldString739 instanceof Utf8) {
+                    charSequence739 = (decoder).readString(((Utf8) oldString739));
+                } else {
+                    charSequence739 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, charSequence739);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F739': "+ unionIndex739));
+            }
+        }
+        int unionIndex740 = (decoder.readIndex());
+        if (unionIndex740 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, null);
+        } else {
+            if (unionIndex740 == 1) {
+                Utf8 charSequence740;
+                Object oldString740 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(740);
+                if (oldString740 instanceof Utf8) {
+                    charSequence740 = (decoder).readString(((Utf8) oldString740));
+                } else {
+                    charSequence740 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, charSequence740);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F740': "+ unionIndex740));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex741 = (decoder.readIndex());
+        if (unionIndex741 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, null);
+        } else {
+            if (unionIndex741 == 1) {
+                Utf8 charSequence741;
+                Object oldString741 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(741);
+                if (oldString741 instanceof Utf8) {
+                    charSequence741 = (decoder).readString(((Utf8) oldString741));
+                } else {
+                    charSequence741 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, charSequence741);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F741': "+ unionIndex741));
+            }
+        }
+        int unionIndex742 = (decoder.readIndex());
+        if (unionIndex742 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, null);
+        } else {
+            if (unionIndex742 == 1) {
+                Utf8 charSequence742;
+                Object oldString742 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(742);
+                if (oldString742 instanceof Utf8) {
+                    charSequence742 = (decoder).readString(((Utf8) oldString742));
+                } else {
+                    charSequence742 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, charSequence742);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F742': "+ unionIndex742));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex743 = (decoder.readIndex());
+        if (unionIndex743 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, null);
+        } else {
+            if (unionIndex743 == 1) {
+                Utf8 charSequence743;
+                Object oldString743 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(743);
+                if (oldString743 instanceof Utf8) {
+                    charSequence743 = (decoder).readString(((Utf8) oldString743));
+                } else {
+                    charSequence743 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, charSequence743);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F743': "+ unionIndex743));
+            }
+        }
+        int unionIndex744 = (decoder.readIndex());
+        if (unionIndex744 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, null);
+        } else {
+            if (unionIndex744 == 1) {
+                Utf8 charSequence744;
+                Object oldString744 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(744);
+                if (oldString744 instanceof Utf8) {
+                    charSequence744 = (decoder).readString(((Utf8) oldString744));
+                } else {
+                    charSequence744 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, charSequence744);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F744': "+ unionIndex744));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex745 = (decoder.readIndex());
+        if (unionIndex745 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, null);
+        } else {
+            if (unionIndex745 == 1) {
+                Utf8 charSequence745;
+                Object oldString745 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(745);
+                if (oldString745 instanceof Utf8) {
+                    charSequence745 = (decoder).readString(((Utf8) oldString745));
+                } else {
+                    charSequence745 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, charSequence745);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F745': "+ unionIndex745));
+            }
+        }
+        int unionIndex746 = (decoder.readIndex());
+        if (unionIndex746 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, null);
+        } else {
+            if (unionIndex746 == 1) {
+                Utf8 charSequence746;
+                Object oldString746 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(746);
+                if (oldString746 instanceof Utf8) {
+                    charSequence746 = (decoder).readString(((Utf8) oldString746));
+                } else {
+                    charSequence746 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, charSequence746);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F746': "+ unionIndex746));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex747 = (decoder.readIndex());
+        if (unionIndex747 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, null);
+        } else {
+            if (unionIndex747 == 1) {
+                Utf8 charSequence747;
+                Object oldString747 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(747);
+                if (oldString747 instanceof Utf8) {
+                    charSequence747 = (decoder).readString(((Utf8) oldString747));
+                } else {
+                    charSequence747 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, charSequence747);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F747': "+ unionIndex747));
+            }
+        }
+        int unionIndex748 = (decoder.readIndex());
+        if (unionIndex748 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, null);
+        } else {
+            if (unionIndex748 == 1) {
+                Utf8 charSequence748;
+                Object oldString748 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(748);
+                if (oldString748 instanceof Utf8) {
+                    charSequence748 = (decoder).readString(((Utf8) oldString748));
+                } else {
+                    charSequence748 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, charSequence748);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F748': "+ unionIndex748));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex749 = (decoder.readIndex());
+        if (unionIndex749 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, null);
+        } else {
+            if (unionIndex749 == 1) {
+                Utf8 charSequence749;
+                Object oldString749 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(749);
+                if (oldString749 instanceof Utf8) {
+                    charSequence749 = (decoder).readString(((Utf8) oldString749));
+                } else {
+                    charSequence749 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, charSequence749);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F749': "+ unionIndex749));
+            }
+        }
+        int unionIndex750 = (decoder.readIndex());
+        if (unionIndex750 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, null);
+        } else {
+            if (unionIndex750 == 1) {
+                Utf8 charSequence750;
+                Object oldString750 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(750);
+                if (oldString750 instanceof Utf8) {
+                    charSequence750 = (decoder).readString(((Utf8) oldString750));
+                } else {
+                    charSequence750 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, charSequence750);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F750': "+ unionIndex750));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex751 = (decoder.readIndex());
+        if (unionIndex751 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, null);
+        } else {
+            if (unionIndex751 == 1) {
+                Utf8 charSequence751;
+                Object oldString751 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(751);
+                if (oldString751 instanceof Utf8) {
+                    charSequence751 = (decoder).readString(((Utf8) oldString751));
+                } else {
+                    charSequence751 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, charSequence751);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F751': "+ unionIndex751));
+            }
+        }
+        int unionIndex752 = (decoder.readIndex());
+        if (unionIndex752 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, null);
+        } else {
+            if (unionIndex752 == 1) {
+                Utf8 charSequence752;
+                Object oldString752 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(752);
+                if (oldString752 instanceof Utf8) {
+                    charSequence752 = (decoder).readString(((Utf8) oldString752));
+                } else {
+                    charSequence752 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, charSequence752);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F752': "+ unionIndex752));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex753 = (decoder.readIndex());
+        if (unionIndex753 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, null);
+        } else {
+            if (unionIndex753 == 1) {
+                Utf8 charSequence753;
+                Object oldString753 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(753);
+                if (oldString753 instanceof Utf8) {
+                    charSequence753 = (decoder).readString(((Utf8) oldString753));
+                } else {
+                    charSequence753 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, charSequence753);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F753': "+ unionIndex753));
+            }
+        }
+        int unionIndex754 = (decoder.readIndex());
+        if (unionIndex754 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, null);
+        } else {
+            if (unionIndex754 == 1) {
+                Utf8 charSequence754;
+                Object oldString754 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(754);
+                if (oldString754 instanceof Utf8) {
+                    charSequence754 = (decoder).readString(((Utf8) oldString754));
+                } else {
+                    charSequence754 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, charSequence754);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F754': "+ unionIndex754));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex755 = (decoder.readIndex());
+        if (unionIndex755 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, null);
+        } else {
+            if (unionIndex755 == 1) {
+                Utf8 charSequence755;
+                Object oldString755 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(755);
+                if (oldString755 instanceof Utf8) {
+                    charSequence755 = (decoder).readString(((Utf8) oldString755));
+                } else {
+                    charSequence755 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, charSequence755);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F755': "+ unionIndex755));
+            }
+        }
+        int unionIndex756 = (decoder.readIndex());
+        if (unionIndex756 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, null);
+        } else {
+            if (unionIndex756 == 1) {
+                Utf8 charSequence756;
+                Object oldString756 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(756);
+                if (oldString756 instanceof Utf8) {
+                    charSequence756 = (decoder).readString(((Utf8) oldString756));
+                } else {
+                    charSequence756 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, charSequence756);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F756': "+ unionIndex756));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex757 = (decoder.readIndex());
+        if (unionIndex757 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, null);
+        } else {
+            if (unionIndex757 == 1) {
+                Utf8 charSequence757;
+                Object oldString757 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(757);
+                if (oldString757 instanceof Utf8) {
+                    charSequence757 = (decoder).readString(((Utf8) oldString757));
+                } else {
+                    charSequence757 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, charSequence757);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F757': "+ unionIndex757));
+            }
+        }
+        int unionIndex758 = (decoder.readIndex());
+        if (unionIndex758 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, null);
+        } else {
+            if (unionIndex758 == 1) {
+                Utf8 charSequence758;
+                Object oldString758 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(758);
+                if (oldString758 instanceof Utf8) {
+                    charSequence758 = (decoder).readString(((Utf8) oldString758));
+                } else {
+                    charSequence758 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, charSequence758);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F758': "+ unionIndex758));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex759 = (decoder.readIndex());
+        if (unionIndex759 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, null);
+        } else {
+            if (unionIndex759 == 1) {
+                Utf8 charSequence759;
+                Object oldString759 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(759);
+                if (oldString759 instanceof Utf8) {
+                    charSequence759 = (decoder).readString(((Utf8) oldString759));
+                } else {
+                    charSequence759 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, charSequence759);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F759': "+ unionIndex759));
+            }
+        }
+        int unionIndex760 = (decoder.readIndex());
+        if (unionIndex760 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, null);
+        } else {
+            if (unionIndex760 == 1) {
+                Utf8 charSequence760;
+                Object oldString760 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(760);
+                if (oldString760 instanceof Utf8) {
+                    charSequence760 = (decoder).readString(((Utf8) oldString760));
+                } else {
+                    charSequence760 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, charSequence760);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F760': "+ unionIndex760));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex761 = (decoder.readIndex());
+        if (unionIndex761 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, null);
+        } else {
+            if (unionIndex761 == 1) {
+                Utf8 charSequence761;
+                Object oldString761 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(761);
+                if (oldString761 instanceof Utf8) {
+                    charSequence761 = (decoder).readString(((Utf8) oldString761));
+                } else {
+                    charSequence761 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, charSequence761);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F761': "+ unionIndex761));
+            }
+        }
+        int unionIndex762 = (decoder.readIndex());
+        if (unionIndex762 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, null);
+        } else {
+            if (unionIndex762 == 1) {
+                Utf8 charSequence762;
+                Object oldString762 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(762);
+                if (oldString762 instanceof Utf8) {
+                    charSequence762 = (decoder).readString(((Utf8) oldString762));
+                } else {
+                    charSequence762 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, charSequence762);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F762': "+ unionIndex762));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex763 = (decoder.readIndex());
+        if (unionIndex763 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, null);
+        } else {
+            if (unionIndex763 == 1) {
+                Utf8 charSequence763;
+                Object oldString763 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(763);
+                if (oldString763 instanceof Utf8) {
+                    charSequence763 = (decoder).readString(((Utf8) oldString763));
+                } else {
+                    charSequence763 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, charSequence763);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F763': "+ unionIndex763));
+            }
+        }
+        int unionIndex764 = (decoder.readIndex());
+        if (unionIndex764 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, null);
+        } else {
+            if (unionIndex764 == 1) {
+                Utf8 charSequence764;
+                Object oldString764 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(764);
+                if (oldString764 instanceof Utf8) {
+                    charSequence764 = (decoder).readString(((Utf8) oldString764));
+                } else {
+                    charSequence764 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, charSequence764);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F764': "+ unionIndex764));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex765 = (decoder.readIndex());
+        if (unionIndex765 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, null);
+        } else {
+            if (unionIndex765 == 1) {
+                Utf8 charSequence765;
+                Object oldString765 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(765);
+                if (oldString765 instanceof Utf8) {
+                    charSequence765 = (decoder).readString(((Utf8) oldString765));
+                } else {
+                    charSequence765 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, charSequence765);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F765': "+ unionIndex765));
+            }
+        }
+        int unionIndex766 = (decoder.readIndex());
+        if (unionIndex766 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, null);
+        } else {
+            if (unionIndex766 == 1) {
+                Utf8 charSequence766;
+                Object oldString766 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(766);
+                if (oldString766 instanceof Utf8) {
+                    charSequence766 = (decoder).readString(((Utf8) oldString766));
+                } else {
+                    charSequence766 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, charSequence766);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F766': "+ unionIndex766));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex767 = (decoder.readIndex());
+        if (unionIndex767 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, null);
+        } else {
+            if (unionIndex767 == 1) {
+                Utf8 charSequence767;
+                Object oldString767 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(767);
+                if (oldString767 instanceof Utf8) {
+                    charSequence767 = (decoder).readString(((Utf8) oldString767));
+                } else {
+                    charSequence767 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, charSequence767);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F767': "+ unionIndex767));
+            }
+        }
+        int unionIndex768 = (decoder.readIndex());
+        if (unionIndex768 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, null);
+        } else {
+            if (unionIndex768 == 1) {
+                Utf8 charSequence768;
+                Object oldString768 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(768);
+                if (oldString768 instanceof Utf8) {
+                    charSequence768 = (decoder).readString(((Utf8) oldString768));
+                } else {
+                    charSequence768 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, charSequence768);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F768': "+ unionIndex768));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex769 = (decoder.readIndex());
+        if (unionIndex769 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, null);
+        } else {
+            if (unionIndex769 == 1) {
+                Utf8 charSequence769;
+                Object oldString769 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(769);
+                if (oldString769 instanceof Utf8) {
+                    charSequence769 = (decoder).readString(((Utf8) oldString769));
+                } else {
+                    charSequence769 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, charSequence769);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F769': "+ unionIndex769));
+            }
+        }
+        int unionIndex770 = (decoder.readIndex());
+        if (unionIndex770 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, null);
+        } else {
+            if (unionIndex770 == 1) {
+                Utf8 charSequence770;
+                Object oldString770 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(770);
+                if (oldString770 instanceof Utf8) {
+                    charSequence770 = (decoder).readString(((Utf8) oldString770));
+                } else {
+                    charSequence770 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, charSequence770);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F770': "+ unionIndex770));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex771 = (decoder.readIndex());
+        if (unionIndex771 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, null);
+        } else {
+            if (unionIndex771 == 1) {
+                Utf8 charSequence771;
+                Object oldString771 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(771);
+                if (oldString771 instanceof Utf8) {
+                    charSequence771 = (decoder).readString(((Utf8) oldString771));
+                } else {
+                    charSequence771 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, charSequence771);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F771': "+ unionIndex771));
+            }
+        }
+        int unionIndex772 = (decoder.readIndex());
+        if (unionIndex772 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, null);
+        } else {
+            if (unionIndex772 == 1) {
+                Utf8 charSequence772;
+                Object oldString772 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(772);
+                if (oldString772 instanceof Utf8) {
+                    charSequence772 = (decoder).readString(((Utf8) oldString772));
+                } else {
+                    charSequence772 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, charSequence772);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F772': "+ unionIndex772));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex773 = (decoder.readIndex());
+        if (unionIndex773 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, null);
+        } else {
+            if (unionIndex773 == 1) {
+                Utf8 charSequence773;
+                Object oldString773 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(773);
+                if (oldString773 instanceof Utf8) {
+                    charSequence773 = (decoder).readString(((Utf8) oldString773));
+                } else {
+                    charSequence773 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, charSequence773);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F773': "+ unionIndex773));
+            }
+        }
+        int unionIndex774 = (decoder.readIndex());
+        if (unionIndex774 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, null);
+        } else {
+            if (unionIndex774 == 1) {
+                Utf8 charSequence774;
+                Object oldString774 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(774);
+                if (oldString774 instanceof Utf8) {
+                    charSequence774 = (decoder).readString(((Utf8) oldString774));
+                } else {
+                    charSequence774 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, charSequence774);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F774': "+ unionIndex774));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex775 = (decoder.readIndex());
+        if (unionIndex775 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, null);
+        } else {
+            if (unionIndex775 == 1) {
+                Utf8 charSequence775;
+                Object oldString775 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(775);
+                if (oldString775 instanceof Utf8) {
+                    charSequence775 = (decoder).readString(((Utf8) oldString775));
+                } else {
+                    charSequence775 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, charSequence775);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F775': "+ unionIndex775));
+            }
+        }
+        int unionIndex776 = (decoder.readIndex());
+        if (unionIndex776 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, null);
+        } else {
+            if (unionIndex776 == 1) {
+                Utf8 charSequence776;
+                Object oldString776 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(776);
+                if (oldString776 instanceof Utf8) {
+                    charSequence776 = (decoder).readString(((Utf8) oldString776));
+                } else {
+                    charSequence776 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, charSequence776);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F776': "+ unionIndex776));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex777 = (decoder.readIndex());
+        if (unionIndex777 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, null);
+        } else {
+            if (unionIndex777 == 1) {
+                Utf8 charSequence777;
+                Object oldString777 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(777);
+                if (oldString777 instanceof Utf8) {
+                    charSequence777 = (decoder).readString(((Utf8) oldString777));
+                } else {
+                    charSequence777 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, charSequence777);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F777': "+ unionIndex777));
+            }
+        }
+        int unionIndex778 = (decoder.readIndex());
+        if (unionIndex778 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, null);
+        } else {
+            if (unionIndex778 == 1) {
+                Utf8 charSequence778;
+                Object oldString778 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(778);
+                if (oldString778 instanceof Utf8) {
+                    charSequence778 = (decoder).readString(((Utf8) oldString778));
+                } else {
+                    charSequence778 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, charSequence778);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F778': "+ unionIndex778));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex779 = (decoder.readIndex());
+        if (unionIndex779 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, null);
+        } else {
+            if (unionIndex779 == 1) {
+                Utf8 charSequence779;
+                Object oldString779 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(779);
+                if (oldString779 instanceof Utf8) {
+                    charSequence779 = (decoder).readString(((Utf8) oldString779));
+                } else {
+                    charSequence779 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, charSequence779);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F779': "+ unionIndex779));
+            }
+        }
+        int unionIndex780 = (decoder.readIndex());
+        if (unionIndex780 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, null);
+        } else {
+            if (unionIndex780 == 1) {
+                Utf8 charSequence780;
+                Object oldString780 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(780);
+                if (oldString780 instanceof Utf8) {
+                    charSequence780 = (decoder).readString(((Utf8) oldString780));
+                } else {
+                    charSequence780 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, charSequence780);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F780': "+ unionIndex780));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex781 = (decoder.readIndex());
+        if (unionIndex781 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, null);
+        } else {
+            if (unionIndex781 == 1) {
+                Utf8 charSequence781;
+                Object oldString781 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(781);
+                if (oldString781 instanceof Utf8) {
+                    charSequence781 = (decoder).readString(((Utf8) oldString781));
+                } else {
+                    charSequence781 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, charSequence781);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F781': "+ unionIndex781));
+            }
+        }
+        int unionIndex782 = (decoder.readIndex());
+        if (unionIndex782 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, null);
+        } else {
+            if (unionIndex782 == 1) {
+                Utf8 charSequence782;
+                Object oldString782 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(782);
+                if (oldString782 instanceof Utf8) {
+                    charSequence782 = (decoder).readString(((Utf8) oldString782));
+                } else {
+                    charSequence782 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, charSequence782);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F782': "+ unionIndex782));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex783 = (decoder.readIndex());
+        if (unionIndex783 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, null);
+        } else {
+            if (unionIndex783 == 1) {
+                Utf8 charSequence783;
+                Object oldString783 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(783);
+                if (oldString783 instanceof Utf8) {
+                    charSequence783 = (decoder).readString(((Utf8) oldString783));
+                } else {
+                    charSequence783 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, charSequence783);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F783': "+ unionIndex783));
+            }
+        }
+        int unionIndex784 = (decoder.readIndex());
+        if (unionIndex784 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, null);
+        } else {
+            if (unionIndex784 == 1) {
+                Utf8 charSequence784;
+                Object oldString784 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(784);
+                if (oldString784 instanceof Utf8) {
+                    charSequence784 = (decoder).readString(((Utf8) oldString784));
+                } else {
+                    charSequence784 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, charSequence784);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F784': "+ unionIndex784));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex785 = (decoder.readIndex());
+        if (unionIndex785 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, null);
+        } else {
+            if (unionIndex785 == 1) {
+                Utf8 charSequence785;
+                Object oldString785 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(785);
+                if (oldString785 instanceof Utf8) {
+                    charSequence785 = (decoder).readString(((Utf8) oldString785));
+                } else {
+                    charSequence785 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, charSequence785);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F785': "+ unionIndex785));
+            }
+        }
+        int unionIndex786 = (decoder.readIndex());
+        if (unionIndex786 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, null);
+        } else {
+            if (unionIndex786 == 1) {
+                Utf8 charSequence786;
+                Object oldString786 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(786);
+                if (oldString786 instanceof Utf8) {
+                    charSequence786 = (decoder).readString(((Utf8) oldString786));
+                } else {
+                    charSequence786 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, charSequence786);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F786': "+ unionIndex786));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex787 = (decoder.readIndex());
+        if (unionIndex787 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, null);
+        } else {
+            if (unionIndex787 == 1) {
+                Utf8 charSequence787;
+                Object oldString787 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(787);
+                if (oldString787 instanceof Utf8) {
+                    charSequence787 = (decoder).readString(((Utf8) oldString787));
+                } else {
+                    charSequence787 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, charSequence787);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F787': "+ unionIndex787));
+            }
+        }
+        int unionIndex788 = (decoder.readIndex());
+        if (unionIndex788 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, null);
+        } else {
+            if (unionIndex788 == 1) {
+                Utf8 charSequence788;
+                Object oldString788 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(788);
+                if (oldString788 instanceof Utf8) {
+                    charSequence788 = (decoder).readString(((Utf8) oldString788));
+                } else {
+                    charSequence788 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, charSequence788);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F788': "+ unionIndex788));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex789 = (decoder.readIndex());
+        if (unionIndex789 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, null);
+        } else {
+            if (unionIndex789 == 1) {
+                Utf8 charSequence789;
+                Object oldString789 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(789);
+                if (oldString789 instanceof Utf8) {
+                    charSequence789 = (decoder).readString(((Utf8) oldString789));
+                } else {
+                    charSequence789 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, charSequence789);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F789': "+ unionIndex789));
+            }
+        }
+        int unionIndex790 = (decoder.readIndex());
+        if (unionIndex790 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, null);
+        } else {
+            if (unionIndex790 == 1) {
+                Utf8 charSequence790;
+                Object oldString790 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(790);
+                if (oldString790 instanceof Utf8) {
+                    charSequence790 = (decoder).readString(((Utf8) oldString790));
+                } else {
+                    charSequence790 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, charSequence790);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F790': "+ unionIndex790));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex791 = (decoder.readIndex());
+        if (unionIndex791 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, null);
+        } else {
+            if (unionIndex791 == 1) {
+                Utf8 charSequence791;
+                Object oldString791 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(791);
+                if (oldString791 instanceof Utf8) {
+                    charSequence791 = (decoder).readString(((Utf8) oldString791));
+                } else {
+                    charSequence791 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, charSequence791);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F791': "+ unionIndex791));
+            }
+        }
+        int unionIndex792 = (decoder.readIndex());
+        if (unionIndex792 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, null);
+        } else {
+            if (unionIndex792 == 1) {
+                Utf8 charSequence792;
+                Object oldString792 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(792);
+                if (oldString792 instanceof Utf8) {
+                    charSequence792 = (decoder).readString(((Utf8) oldString792));
+                } else {
+                    charSequence792 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, charSequence792);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F792': "+ unionIndex792));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex793 = (decoder.readIndex());
+        if (unionIndex793 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, null);
+        } else {
+            if (unionIndex793 == 1) {
+                Utf8 charSequence793;
+                Object oldString793 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(793);
+                if (oldString793 instanceof Utf8) {
+                    charSequence793 = (decoder).readString(((Utf8) oldString793));
+                } else {
+                    charSequence793 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, charSequence793);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F793': "+ unionIndex793));
+            }
+        }
+        int unionIndex794 = (decoder.readIndex());
+        if (unionIndex794 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, null);
+        } else {
+            if (unionIndex794 == 1) {
+                Utf8 charSequence794;
+                Object oldString794 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(794);
+                if (oldString794 instanceof Utf8) {
+                    charSequence794 = (decoder).readString(((Utf8) oldString794));
+                } else {
+                    charSequence794 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, charSequence794);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F794': "+ unionIndex794));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex795 = (decoder.readIndex());
+        if (unionIndex795 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, null);
+        } else {
+            if (unionIndex795 == 1) {
+                Utf8 charSequence795;
+                Object oldString795 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(795);
+                if (oldString795 instanceof Utf8) {
+                    charSequence795 = (decoder).readString(((Utf8) oldString795));
+                } else {
+                    charSequence795 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, charSequence795);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F795': "+ unionIndex795));
+            }
+        }
+        int unionIndex796 = (decoder.readIndex());
+        if (unionIndex796 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, null);
+        } else {
+            if (unionIndex796 == 1) {
+                Utf8 charSequence796;
+                Object oldString796 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(796);
+                if (oldString796 instanceof Utf8) {
+                    charSequence796 = (decoder).readString(((Utf8) oldString796));
+                } else {
+                    charSequence796 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, charSequence796);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F796': "+ unionIndex796));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex797 = (decoder.readIndex());
+        if (unionIndex797 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, null);
+        } else {
+            if (unionIndex797 == 1) {
+                Utf8 charSequence797;
+                Object oldString797 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(797);
+                if (oldString797 instanceof Utf8) {
+                    charSequence797 = (decoder).readString(((Utf8) oldString797));
+                } else {
+                    charSequence797 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, charSequence797);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F797': "+ unionIndex797));
+            }
+        }
+        int unionIndex798 = (decoder.readIndex());
+        if (unionIndex798 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, null);
+        } else {
+            if (unionIndex798 == 1) {
+                Utf8 charSequence798;
+                Object oldString798 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(798);
+                if (oldString798 instanceof Utf8) {
+                    charSequence798 = (decoder).readString(((Utf8) oldString798));
+                } else {
+                    charSequence798 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, charSequence798);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F798': "+ unionIndex798));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex799 = (decoder.readIndex());
+        if (unionIndex799 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, null);
+        } else {
+            if (unionIndex799 == 1) {
+                Utf8 charSequence799;
+                Object oldString799 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(799);
+                if (oldString799 instanceof Utf8) {
+                    charSequence799 = (decoder).readString(((Utf8) oldString799));
+                } else {
+                    charSequence799 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, charSequence799);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F799': "+ unionIndex799));
+            }
+        }
+        int unionIndex800 = (decoder.readIndex());
+        if (unionIndex800 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, null);
+        } else {
+            if (unionIndex800 == 1) {
+                Utf8 charSequence800;
+                Object oldString800 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(800);
+                if (oldString800 instanceof Utf8) {
+                    charSequence800 = (decoder).readString(((Utf8) oldString800));
+                } else {
+                    charSequence800 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, charSequence800);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F800': "+ unionIndex800));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex801 = (decoder.readIndex());
+        if (unionIndex801 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, null);
+        } else {
+            if (unionIndex801 == 1) {
+                Utf8 charSequence801;
+                Object oldString801 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(801);
+                if (oldString801 instanceof Utf8) {
+                    charSequence801 = (decoder).readString(((Utf8) oldString801));
+                } else {
+                    charSequence801 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, charSequence801);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F801': "+ unionIndex801));
+            }
+        }
+        int unionIndex802 = (decoder.readIndex());
+        if (unionIndex802 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, null);
+        } else {
+            if (unionIndex802 == 1) {
+                Utf8 charSequence802;
+                Object oldString802 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(802);
+                if (oldString802 instanceof Utf8) {
+                    charSequence802 = (decoder).readString(((Utf8) oldString802));
+                } else {
+                    charSequence802 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, charSequence802);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F802': "+ unionIndex802));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex803 = (decoder.readIndex());
+        if (unionIndex803 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, null);
+        } else {
+            if (unionIndex803 == 1) {
+                Utf8 charSequence803;
+                Object oldString803 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(803);
+                if (oldString803 instanceof Utf8) {
+                    charSequence803 = (decoder).readString(((Utf8) oldString803));
+                } else {
+                    charSequence803 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, charSequence803);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F803': "+ unionIndex803));
+            }
+        }
+        int unionIndex804 = (decoder.readIndex());
+        if (unionIndex804 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, null);
+        } else {
+            if (unionIndex804 == 1) {
+                Utf8 charSequence804;
+                Object oldString804 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(804);
+                if (oldString804 instanceof Utf8) {
+                    charSequence804 = (decoder).readString(((Utf8) oldString804));
+                } else {
+                    charSequence804 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, charSequence804);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F804': "+ unionIndex804));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex805 = (decoder.readIndex());
+        if (unionIndex805 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, null);
+        } else {
+            if (unionIndex805 == 1) {
+                Utf8 charSequence805;
+                Object oldString805 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(805);
+                if (oldString805 instanceof Utf8) {
+                    charSequence805 = (decoder).readString(((Utf8) oldString805));
+                } else {
+                    charSequence805 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, charSequence805);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F805': "+ unionIndex805));
+            }
+        }
+        int unionIndex806 = (decoder.readIndex());
+        if (unionIndex806 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, null);
+        } else {
+            if (unionIndex806 == 1) {
+                Utf8 charSequence806;
+                Object oldString806 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(806);
+                if (oldString806 instanceof Utf8) {
+                    charSequence806 = (decoder).readString(((Utf8) oldString806));
+                } else {
+                    charSequence806 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, charSequence806);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F806': "+ unionIndex806));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex807 = (decoder.readIndex());
+        if (unionIndex807 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, null);
+        } else {
+            if (unionIndex807 == 1) {
+                Utf8 charSequence807;
+                Object oldString807 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(807);
+                if (oldString807 instanceof Utf8) {
+                    charSequence807 = (decoder).readString(((Utf8) oldString807));
+                } else {
+                    charSequence807 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, charSequence807);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F807': "+ unionIndex807));
+            }
+        }
+        int unionIndex808 = (decoder.readIndex());
+        if (unionIndex808 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, null);
+        } else {
+            if (unionIndex808 == 1) {
+                Utf8 charSequence808;
+                Object oldString808 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(808);
+                if (oldString808 instanceof Utf8) {
+                    charSequence808 = (decoder).readString(((Utf8) oldString808));
+                } else {
+                    charSequence808 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, charSequence808);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F808': "+ unionIndex808));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex809 = (decoder.readIndex());
+        if (unionIndex809 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, null);
+        } else {
+            if (unionIndex809 == 1) {
+                Utf8 charSequence809;
+                Object oldString809 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(809);
+                if (oldString809 instanceof Utf8) {
+                    charSequence809 = (decoder).readString(((Utf8) oldString809));
+                } else {
+                    charSequence809 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, charSequence809);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F809': "+ unionIndex809));
+            }
+        }
+        int unionIndex810 = (decoder.readIndex());
+        if (unionIndex810 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, null);
+        } else {
+            if (unionIndex810 == 1) {
+                Utf8 charSequence810;
+                Object oldString810 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(810);
+                if (oldString810 instanceof Utf8) {
+                    charSequence810 = (decoder).readString(((Utf8) oldString810));
+                } else {
+                    charSequence810 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, charSequence810);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F810': "+ unionIndex810));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex811 = (decoder.readIndex());
+        if (unionIndex811 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, null);
+        } else {
+            if (unionIndex811 == 1) {
+                Utf8 charSequence811;
+                Object oldString811 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(811);
+                if (oldString811 instanceof Utf8) {
+                    charSequence811 = (decoder).readString(((Utf8) oldString811));
+                } else {
+                    charSequence811 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, charSequence811);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F811': "+ unionIndex811));
+            }
+        }
+        int unionIndex812 = (decoder.readIndex());
+        if (unionIndex812 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, null);
+        } else {
+            if (unionIndex812 == 1) {
+                Utf8 charSequence812;
+                Object oldString812 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(812);
+                if (oldString812 instanceof Utf8) {
+                    charSequence812 = (decoder).readString(((Utf8) oldString812));
+                } else {
+                    charSequence812 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, charSequence812);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F812': "+ unionIndex812));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex813 = (decoder.readIndex());
+        if (unionIndex813 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, null);
+        } else {
+            if (unionIndex813 == 1) {
+                Utf8 charSequence813;
+                Object oldString813 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(813);
+                if (oldString813 instanceof Utf8) {
+                    charSequence813 = (decoder).readString(((Utf8) oldString813));
+                } else {
+                    charSequence813 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, charSequence813);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F813': "+ unionIndex813));
+            }
+        }
+        int unionIndex814 = (decoder.readIndex());
+        if (unionIndex814 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, null);
+        } else {
+            if (unionIndex814 == 1) {
+                Utf8 charSequence814;
+                Object oldString814 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(814);
+                if (oldString814 instanceof Utf8) {
+                    charSequence814 = (decoder).readString(((Utf8) oldString814));
+                } else {
+                    charSequence814 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, charSequence814);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F814': "+ unionIndex814));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex815 = (decoder.readIndex());
+        if (unionIndex815 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, null);
+        } else {
+            if (unionIndex815 == 1) {
+                Utf8 charSequence815;
+                Object oldString815 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(815);
+                if (oldString815 instanceof Utf8) {
+                    charSequence815 = (decoder).readString(((Utf8) oldString815));
+                } else {
+                    charSequence815 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, charSequence815);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F815': "+ unionIndex815));
+            }
+        }
+        int unionIndex816 = (decoder.readIndex());
+        if (unionIndex816 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, null);
+        } else {
+            if (unionIndex816 == 1) {
+                Utf8 charSequence816;
+                Object oldString816 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(816);
+                if (oldString816 instanceof Utf8) {
+                    charSequence816 = (decoder).readString(((Utf8) oldString816));
+                } else {
+                    charSequence816 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, charSequence816);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F816': "+ unionIndex816));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex817 = (decoder.readIndex());
+        if (unionIndex817 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, null);
+        } else {
+            if (unionIndex817 == 1) {
+                Utf8 charSequence817;
+                Object oldString817 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(817);
+                if (oldString817 instanceof Utf8) {
+                    charSequence817 = (decoder).readString(((Utf8) oldString817));
+                } else {
+                    charSequence817 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, charSequence817);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F817': "+ unionIndex817));
+            }
+        }
+        int unionIndex818 = (decoder.readIndex());
+        if (unionIndex818 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, null);
+        } else {
+            if (unionIndex818 == 1) {
+                Utf8 charSequence818;
+                Object oldString818 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(818);
+                if (oldString818 instanceof Utf8) {
+                    charSequence818 = (decoder).readString(((Utf8) oldString818));
+                } else {
+                    charSequence818 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, charSequence818);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F818': "+ unionIndex818));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex819 = (decoder.readIndex());
+        if (unionIndex819 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, null);
+        } else {
+            if (unionIndex819 == 1) {
+                Utf8 charSequence819;
+                Object oldString819 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(819);
+                if (oldString819 instanceof Utf8) {
+                    charSequence819 = (decoder).readString(((Utf8) oldString819));
+                } else {
+                    charSequence819 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, charSequence819);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F819': "+ unionIndex819));
+            }
+        }
+        int unionIndex820 = (decoder.readIndex());
+        if (unionIndex820 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, null);
+        } else {
+            if (unionIndex820 == 1) {
+                Utf8 charSequence820;
+                Object oldString820 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(820);
+                if (oldString820 instanceof Utf8) {
+                    charSequence820 = (decoder).readString(((Utf8) oldString820));
+                } else {
+                    charSequence820 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, charSequence820);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F820': "+ unionIndex820));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex821 = (decoder.readIndex());
+        if (unionIndex821 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, null);
+        } else {
+            if (unionIndex821 == 1) {
+                Utf8 charSequence821;
+                Object oldString821 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(821);
+                if (oldString821 instanceof Utf8) {
+                    charSequence821 = (decoder).readString(((Utf8) oldString821));
+                } else {
+                    charSequence821 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, charSequence821);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F821': "+ unionIndex821));
+            }
+        }
+        int unionIndex822 = (decoder.readIndex());
+        if (unionIndex822 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, null);
+        } else {
+            if (unionIndex822 == 1) {
+                Utf8 charSequence822;
+                Object oldString822 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(822);
+                if (oldString822 instanceof Utf8) {
+                    charSequence822 = (decoder).readString(((Utf8) oldString822));
+                } else {
+                    charSequence822 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, charSequence822);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F822': "+ unionIndex822));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex823 = (decoder.readIndex());
+        if (unionIndex823 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, null);
+        } else {
+            if (unionIndex823 == 1) {
+                Utf8 charSequence823;
+                Object oldString823 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(823);
+                if (oldString823 instanceof Utf8) {
+                    charSequence823 = (decoder).readString(((Utf8) oldString823));
+                } else {
+                    charSequence823 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, charSequence823);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F823': "+ unionIndex823));
+            }
+        }
+        int unionIndex824 = (decoder.readIndex());
+        if (unionIndex824 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, null);
+        } else {
+            if (unionIndex824 == 1) {
+                Utf8 charSequence824;
+                Object oldString824 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(824);
+                if (oldString824 instanceof Utf8) {
+                    charSequence824 = (decoder).readString(((Utf8) oldString824));
+                } else {
+                    charSequence824 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, charSequence824);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F824': "+ unionIndex824));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex825 = (decoder.readIndex());
+        if (unionIndex825 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, null);
+        } else {
+            if (unionIndex825 == 1) {
+                Utf8 charSequence825;
+                Object oldString825 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(825);
+                if (oldString825 instanceof Utf8) {
+                    charSequence825 = (decoder).readString(((Utf8) oldString825));
+                } else {
+                    charSequence825 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, charSequence825);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F825': "+ unionIndex825));
+            }
+        }
+        int unionIndex826 = (decoder.readIndex());
+        if (unionIndex826 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, null);
+        } else {
+            if (unionIndex826 == 1) {
+                Utf8 charSequence826;
+                Object oldString826 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(826);
+                if (oldString826 instanceof Utf8) {
+                    charSequence826 = (decoder).readString(((Utf8) oldString826));
+                } else {
+                    charSequence826 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, charSequence826);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F826': "+ unionIndex826));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex827 = (decoder.readIndex());
+        if (unionIndex827 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, null);
+        } else {
+            if (unionIndex827 == 1) {
+                Utf8 charSequence827;
+                Object oldString827 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(827);
+                if (oldString827 instanceof Utf8) {
+                    charSequence827 = (decoder).readString(((Utf8) oldString827));
+                } else {
+                    charSequence827 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, charSequence827);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F827': "+ unionIndex827));
+            }
+        }
+        int unionIndex828 = (decoder.readIndex());
+        if (unionIndex828 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, null);
+        } else {
+            if (unionIndex828 == 1) {
+                Utf8 charSequence828;
+                Object oldString828 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(828);
+                if (oldString828 instanceof Utf8) {
+                    charSequence828 = (decoder).readString(((Utf8) oldString828));
+                } else {
+                    charSequence828 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, charSequence828);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F828': "+ unionIndex828));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex829 = (decoder.readIndex());
+        if (unionIndex829 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, null);
+        } else {
+            if (unionIndex829 == 1) {
+                Utf8 charSequence829;
+                Object oldString829 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(829);
+                if (oldString829 instanceof Utf8) {
+                    charSequence829 = (decoder).readString(((Utf8) oldString829));
+                } else {
+                    charSequence829 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, charSequence829);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F829': "+ unionIndex829));
+            }
+        }
+        int unionIndex830 = (decoder.readIndex());
+        if (unionIndex830 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, null);
+        } else {
+            if (unionIndex830 == 1) {
+                Utf8 charSequence830;
+                Object oldString830 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(830);
+                if (oldString830 instanceof Utf8) {
+                    charSequence830 = (decoder).readString(((Utf8) oldString830));
+                } else {
+                    charSequence830 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, charSequence830);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F830': "+ unionIndex830));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex831 = (decoder.readIndex());
+        if (unionIndex831 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, null);
+        } else {
+            if (unionIndex831 == 1) {
+                Utf8 charSequence831;
+                Object oldString831 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(831);
+                if (oldString831 instanceof Utf8) {
+                    charSequence831 = (decoder).readString(((Utf8) oldString831));
+                } else {
+                    charSequence831 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, charSequence831);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F831': "+ unionIndex831));
+            }
+        }
+        int unionIndex832 = (decoder.readIndex());
+        if (unionIndex832 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, null);
+        } else {
+            if (unionIndex832 == 1) {
+                Utf8 charSequence832;
+                Object oldString832 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(832);
+                if (oldString832 instanceof Utf8) {
+                    charSequence832 = (decoder).readString(((Utf8) oldString832));
+                } else {
+                    charSequence832 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, charSequence832);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F832': "+ unionIndex832));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex833 = (decoder.readIndex());
+        if (unionIndex833 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, null);
+        } else {
+            if (unionIndex833 == 1) {
+                Utf8 charSequence833;
+                Object oldString833 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(833);
+                if (oldString833 instanceof Utf8) {
+                    charSequence833 = (decoder).readString(((Utf8) oldString833));
+                } else {
+                    charSequence833 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, charSequence833);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F833': "+ unionIndex833));
+            }
+        }
+        int unionIndex834 = (decoder.readIndex());
+        if (unionIndex834 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, null);
+        } else {
+            if (unionIndex834 == 1) {
+                Utf8 charSequence834;
+                Object oldString834 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(834);
+                if (oldString834 instanceof Utf8) {
+                    charSequence834 = (decoder).readString(((Utf8) oldString834));
+                } else {
+                    charSequence834 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, charSequence834);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F834': "+ unionIndex834));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex835 = (decoder.readIndex());
+        if (unionIndex835 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, null);
+        } else {
+            if (unionIndex835 == 1) {
+                Utf8 charSequence835;
+                Object oldString835 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(835);
+                if (oldString835 instanceof Utf8) {
+                    charSequence835 = (decoder).readString(((Utf8) oldString835));
+                } else {
+                    charSequence835 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, charSequence835);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F835': "+ unionIndex835));
+            }
+        }
+        int unionIndex836 = (decoder.readIndex());
+        if (unionIndex836 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, null);
+        } else {
+            if (unionIndex836 == 1) {
+                Utf8 charSequence836;
+                Object oldString836 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(836);
+                if (oldString836 instanceof Utf8) {
+                    charSequence836 = (decoder).readString(((Utf8) oldString836));
+                } else {
+                    charSequence836 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, charSequence836);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F836': "+ unionIndex836));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex837 = (decoder.readIndex());
+        if (unionIndex837 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, null);
+        } else {
+            if (unionIndex837 == 1) {
+                Utf8 charSequence837;
+                Object oldString837 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(837);
+                if (oldString837 instanceof Utf8) {
+                    charSequence837 = (decoder).readString(((Utf8) oldString837));
+                } else {
+                    charSequence837 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, charSequence837);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F837': "+ unionIndex837));
+            }
+        }
+        int unionIndex838 = (decoder.readIndex());
+        if (unionIndex838 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, null);
+        } else {
+            if (unionIndex838 == 1) {
+                Utf8 charSequence838;
+                Object oldString838 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(838);
+                if (oldString838 instanceof Utf8) {
+                    charSequence838 = (decoder).readString(((Utf8) oldString838));
+                } else {
+                    charSequence838 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, charSequence838);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F838': "+ unionIndex838));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex839 = (decoder.readIndex());
+        if (unionIndex839 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, null);
+        } else {
+            if (unionIndex839 == 1) {
+                Utf8 charSequence839;
+                Object oldString839 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(839);
+                if (oldString839 instanceof Utf8) {
+                    charSequence839 = (decoder).readString(((Utf8) oldString839));
+                } else {
+                    charSequence839 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, charSequence839);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F839': "+ unionIndex839));
+            }
+        }
+        int unionIndex840 = (decoder.readIndex());
+        if (unionIndex840 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, null);
+        } else {
+            if (unionIndex840 == 1) {
+                Utf8 charSequence840;
+                Object oldString840 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(840);
+                if (oldString840 instanceof Utf8) {
+                    charSequence840 = (decoder).readString(((Utf8) oldString840));
+                } else {
+                    charSequence840 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, charSequence840);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F840': "+ unionIndex840));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex841 = (decoder.readIndex());
+        if (unionIndex841 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, null);
+        } else {
+            if (unionIndex841 == 1) {
+                Utf8 charSequence841;
+                Object oldString841 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(841);
+                if (oldString841 instanceof Utf8) {
+                    charSequence841 = (decoder).readString(((Utf8) oldString841));
+                } else {
+                    charSequence841 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, charSequence841);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F841': "+ unionIndex841));
+            }
+        }
+        int unionIndex842 = (decoder.readIndex());
+        if (unionIndex842 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, null);
+        } else {
+            if (unionIndex842 == 1) {
+                Utf8 charSequence842;
+                Object oldString842 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(842);
+                if (oldString842 instanceof Utf8) {
+                    charSequence842 = (decoder).readString(((Utf8) oldString842));
+                } else {
+                    charSequence842 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, charSequence842);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F842': "+ unionIndex842));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex843 = (decoder.readIndex());
+        if (unionIndex843 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, null);
+        } else {
+            if (unionIndex843 == 1) {
+                Utf8 charSequence843;
+                Object oldString843 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(843);
+                if (oldString843 instanceof Utf8) {
+                    charSequence843 = (decoder).readString(((Utf8) oldString843));
+                } else {
+                    charSequence843 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, charSequence843);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F843': "+ unionIndex843));
+            }
+        }
+        int unionIndex844 = (decoder.readIndex());
+        if (unionIndex844 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, null);
+        } else {
+            if (unionIndex844 == 1) {
+                Utf8 charSequence844;
+                Object oldString844 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(844);
+                if (oldString844 instanceof Utf8) {
+                    charSequence844 = (decoder).readString(((Utf8) oldString844));
+                } else {
+                    charSequence844 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, charSequence844);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F844': "+ unionIndex844));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex845 = (decoder.readIndex());
+        if (unionIndex845 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, null);
+        } else {
+            if (unionIndex845 == 1) {
+                Utf8 charSequence845;
+                Object oldString845 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(845);
+                if (oldString845 instanceof Utf8) {
+                    charSequence845 = (decoder).readString(((Utf8) oldString845));
+                } else {
+                    charSequence845 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, charSequence845);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F845': "+ unionIndex845));
+            }
+        }
+        int unionIndex846 = (decoder.readIndex());
+        if (unionIndex846 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, null);
+        } else {
+            if (unionIndex846 == 1) {
+                Utf8 charSequence846;
+                Object oldString846 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(846);
+                if (oldString846 instanceof Utf8) {
+                    charSequence846 = (decoder).readString(((Utf8) oldString846));
+                } else {
+                    charSequence846 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, charSequence846);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F846': "+ unionIndex846));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex847 = (decoder.readIndex());
+        if (unionIndex847 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, null);
+        } else {
+            if (unionIndex847 == 1) {
+                Utf8 charSequence847;
+                Object oldString847 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(847);
+                if (oldString847 instanceof Utf8) {
+                    charSequence847 = (decoder).readString(((Utf8) oldString847));
+                } else {
+                    charSequence847 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, charSequence847);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F847': "+ unionIndex847));
+            }
+        }
+        int unionIndex848 = (decoder.readIndex());
+        if (unionIndex848 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, null);
+        } else {
+            if (unionIndex848 == 1) {
+                Utf8 charSequence848;
+                Object oldString848 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(848);
+                if (oldString848 instanceof Utf8) {
+                    charSequence848 = (decoder).readString(((Utf8) oldString848));
+                } else {
+                    charSequence848 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, charSequence848);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F848': "+ unionIndex848));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex849 = (decoder.readIndex());
+        if (unionIndex849 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, null);
+        } else {
+            if (unionIndex849 == 1) {
+                Utf8 charSequence849;
+                Object oldString849 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(849);
+                if (oldString849 instanceof Utf8) {
+                    charSequence849 = (decoder).readString(((Utf8) oldString849));
+                } else {
+                    charSequence849 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, charSequence849);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F849': "+ unionIndex849));
+            }
+        }
+        int unionIndex850 = (decoder.readIndex());
+        if (unionIndex850 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, null);
+        } else {
+            if (unionIndex850 == 1) {
+                Utf8 charSequence850;
+                Object oldString850 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(850);
+                if (oldString850 instanceof Utf8) {
+                    charSequence850 = (decoder).readString(((Utf8) oldString850));
+                } else {
+                    charSequence850 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, charSequence850);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F850': "+ unionIndex850));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex851 = (decoder.readIndex());
+        if (unionIndex851 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, null);
+        } else {
+            if (unionIndex851 == 1) {
+                Utf8 charSequence851;
+                Object oldString851 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(851);
+                if (oldString851 instanceof Utf8) {
+                    charSequence851 = (decoder).readString(((Utf8) oldString851));
+                } else {
+                    charSequence851 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, charSequence851);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F851': "+ unionIndex851));
+            }
+        }
+        int unionIndex852 = (decoder.readIndex());
+        if (unionIndex852 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, null);
+        } else {
+            if (unionIndex852 == 1) {
+                Utf8 charSequence852;
+                Object oldString852 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(852);
+                if (oldString852 instanceof Utf8) {
+                    charSequence852 = (decoder).readString(((Utf8) oldString852));
+                } else {
+                    charSequence852 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, charSequence852);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F852': "+ unionIndex852));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex853 = (decoder.readIndex());
+        if (unionIndex853 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, null);
+        } else {
+            if (unionIndex853 == 1) {
+                Utf8 charSequence853;
+                Object oldString853 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(853);
+                if (oldString853 instanceof Utf8) {
+                    charSequence853 = (decoder).readString(((Utf8) oldString853));
+                } else {
+                    charSequence853 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, charSequence853);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F853': "+ unionIndex853));
+            }
+        }
+        int unionIndex854 = (decoder.readIndex());
+        if (unionIndex854 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, null);
+        } else {
+            if (unionIndex854 == 1) {
+                Utf8 charSequence854;
+                Object oldString854 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(854);
+                if (oldString854 instanceof Utf8) {
+                    charSequence854 = (decoder).readString(((Utf8) oldString854));
+                } else {
+                    charSequence854 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, charSequence854);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F854': "+ unionIndex854));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex855 = (decoder.readIndex());
+        if (unionIndex855 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, null);
+        } else {
+            if (unionIndex855 == 1) {
+                Utf8 charSequence855;
+                Object oldString855 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(855);
+                if (oldString855 instanceof Utf8) {
+                    charSequence855 = (decoder).readString(((Utf8) oldString855));
+                } else {
+                    charSequence855 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, charSequence855);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F855': "+ unionIndex855));
+            }
+        }
+        int unionIndex856 = (decoder.readIndex());
+        if (unionIndex856 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, null);
+        } else {
+            if (unionIndex856 == 1) {
+                Utf8 charSequence856;
+                Object oldString856 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(856);
+                if (oldString856 instanceof Utf8) {
+                    charSequence856 = (decoder).readString(((Utf8) oldString856));
+                } else {
+                    charSequence856 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, charSequence856);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F856': "+ unionIndex856));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex857 = (decoder.readIndex());
+        if (unionIndex857 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, null);
+        } else {
+            if (unionIndex857 == 1) {
+                Utf8 charSequence857;
+                Object oldString857 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(857);
+                if (oldString857 instanceof Utf8) {
+                    charSequence857 = (decoder).readString(((Utf8) oldString857));
+                } else {
+                    charSequence857 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, charSequence857);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F857': "+ unionIndex857));
+            }
+        }
+        int unionIndex858 = (decoder.readIndex());
+        if (unionIndex858 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, null);
+        } else {
+            if (unionIndex858 == 1) {
+                Utf8 charSequence858;
+                Object oldString858 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(858);
+                if (oldString858 instanceof Utf8) {
+                    charSequence858 = (decoder).readString(((Utf8) oldString858));
+                } else {
+                    charSequence858 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, charSequence858);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F858': "+ unionIndex858));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex859 = (decoder.readIndex());
+        if (unionIndex859 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, null);
+        } else {
+            if (unionIndex859 == 1) {
+                Utf8 charSequence859;
+                Object oldString859 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(859);
+                if (oldString859 instanceof Utf8) {
+                    charSequence859 = (decoder).readString(((Utf8) oldString859));
+                } else {
+                    charSequence859 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, charSequence859);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F859': "+ unionIndex859));
+            }
+        }
+        int unionIndex860 = (decoder.readIndex());
+        if (unionIndex860 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, null);
+        } else {
+            if (unionIndex860 == 1) {
+                Utf8 charSequence860;
+                Object oldString860 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(860);
+                if (oldString860 instanceof Utf8) {
+                    charSequence860 = (decoder).readString(((Utf8) oldString860));
+                } else {
+                    charSequence860 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, charSequence860);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F860': "+ unionIndex860));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex861 = (decoder.readIndex());
+        if (unionIndex861 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, null);
+        } else {
+            if (unionIndex861 == 1) {
+                Utf8 charSequence861;
+                Object oldString861 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(861);
+                if (oldString861 instanceof Utf8) {
+                    charSequence861 = (decoder).readString(((Utf8) oldString861));
+                } else {
+                    charSequence861 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, charSequence861);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F861': "+ unionIndex861));
+            }
+        }
+        int unionIndex862 = (decoder.readIndex());
+        if (unionIndex862 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, null);
+        } else {
+            if (unionIndex862 == 1) {
+                Utf8 charSequence862;
+                Object oldString862 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(862);
+                if (oldString862 instanceof Utf8) {
+                    charSequence862 = (decoder).readString(((Utf8) oldString862));
+                } else {
+                    charSequence862 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, charSequence862);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F862': "+ unionIndex862));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex863 = (decoder.readIndex());
+        if (unionIndex863 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, null);
+        } else {
+            if (unionIndex863 == 1) {
+                Utf8 charSequence863;
+                Object oldString863 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(863);
+                if (oldString863 instanceof Utf8) {
+                    charSequence863 = (decoder).readString(((Utf8) oldString863));
+                } else {
+                    charSequence863 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, charSequence863);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F863': "+ unionIndex863));
+            }
+        }
+        int unionIndex864 = (decoder.readIndex());
+        if (unionIndex864 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, null);
+        } else {
+            if (unionIndex864 == 1) {
+                Utf8 charSequence864;
+                Object oldString864 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(864);
+                if (oldString864 instanceof Utf8) {
+                    charSequence864 = (decoder).readString(((Utf8) oldString864));
+                } else {
+                    charSequence864 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, charSequence864);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F864': "+ unionIndex864));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex865 = (decoder.readIndex());
+        if (unionIndex865 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, null);
+        } else {
+            if (unionIndex865 == 1) {
+                Utf8 charSequence865;
+                Object oldString865 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(865);
+                if (oldString865 instanceof Utf8) {
+                    charSequence865 = (decoder).readString(((Utf8) oldString865));
+                } else {
+                    charSequence865 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, charSequence865);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F865': "+ unionIndex865));
+            }
+        }
+        int unionIndex866 = (decoder.readIndex());
+        if (unionIndex866 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, null);
+        } else {
+            if (unionIndex866 == 1) {
+                Utf8 charSequence866;
+                Object oldString866 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(866);
+                if (oldString866 instanceof Utf8) {
+                    charSequence866 = (decoder).readString(((Utf8) oldString866));
+                } else {
+                    charSequence866 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, charSequence866);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F866': "+ unionIndex866));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex867 = (decoder.readIndex());
+        if (unionIndex867 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, null);
+        } else {
+            if (unionIndex867 == 1) {
+                Utf8 charSequence867;
+                Object oldString867 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(867);
+                if (oldString867 instanceof Utf8) {
+                    charSequence867 = (decoder).readString(((Utf8) oldString867));
+                } else {
+                    charSequence867 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, charSequence867);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F867': "+ unionIndex867));
+            }
+        }
+        int unionIndex868 = (decoder.readIndex());
+        if (unionIndex868 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, null);
+        } else {
+            if (unionIndex868 == 1) {
+                Utf8 charSequence868;
+                Object oldString868 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(868);
+                if (oldString868 instanceof Utf8) {
+                    charSequence868 = (decoder).readString(((Utf8) oldString868));
+                } else {
+                    charSequence868 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, charSequence868);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F868': "+ unionIndex868));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex869 = (decoder.readIndex());
+        if (unionIndex869 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, null);
+        } else {
+            if (unionIndex869 == 1) {
+                Utf8 charSequence869;
+                Object oldString869 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(869);
+                if (oldString869 instanceof Utf8) {
+                    charSequence869 = (decoder).readString(((Utf8) oldString869));
+                } else {
+                    charSequence869 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, charSequence869);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F869': "+ unionIndex869));
+            }
+        }
+        int unionIndex870 = (decoder.readIndex());
+        if (unionIndex870 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, null);
+        } else {
+            if (unionIndex870 == 1) {
+                Utf8 charSequence870;
+                Object oldString870 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(870);
+                if (oldString870 instanceof Utf8) {
+                    charSequence870 = (decoder).readString(((Utf8) oldString870));
+                } else {
+                    charSequence870 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, charSequence870);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F870': "+ unionIndex870));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex871 = (decoder.readIndex());
+        if (unionIndex871 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, null);
+        } else {
+            if (unionIndex871 == 1) {
+                Utf8 charSequence871;
+                Object oldString871 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(871);
+                if (oldString871 instanceof Utf8) {
+                    charSequence871 = (decoder).readString(((Utf8) oldString871));
+                } else {
+                    charSequence871 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, charSequence871);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F871': "+ unionIndex871));
+            }
+        }
+        int unionIndex872 = (decoder.readIndex());
+        if (unionIndex872 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, null);
+        } else {
+            if (unionIndex872 == 1) {
+                Utf8 charSequence872;
+                Object oldString872 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(872);
+                if (oldString872 instanceof Utf8) {
+                    charSequence872 = (decoder).readString(((Utf8) oldString872));
+                } else {
+                    charSequence872 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, charSequence872);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F872': "+ unionIndex872));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex873 = (decoder.readIndex());
+        if (unionIndex873 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, null);
+        } else {
+            if (unionIndex873 == 1) {
+                Utf8 charSequence873;
+                Object oldString873 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(873);
+                if (oldString873 instanceof Utf8) {
+                    charSequence873 = (decoder).readString(((Utf8) oldString873));
+                } else {
+                    charSequence873 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, charSequence873);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F873': "+ unionIndex873));
+            }
+        }
+        int unionIndex874 = (decoder.readIndex());
+        if (unionIndex874 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, null);
+        } else {
+            if (unionIndex874 == 1) {
+                Utf8 charSequence874;
+                Object oldString874 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(874);
+                if (oldString874 instanceof Utf8) {
+                    charSequence874 = (decoder).readString(((Utf8) oldString874));
+                } else {
+                    charSequence874 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, charSequence874);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F874': "+ unionIndex874));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex875 = (decoder.readIndex());
+        if (unionIndex875 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, null);
+        } else {
+            if (unionIndex875 == 1) {
+                Utf8 charSequence875;
+                Object oldString875 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(875);
+                if (oldString875 instanceof Utf8) {
+                    charSequence875 = (decoder).readString(((Utf8) oldString875));
+                } else {
+                    charSequence875 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, charSequence875);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F875': "+ unionIndex875));
+            }
+        }
+        int unionIndex876 = (decoder.readIndex());
+        if (unionIndex876 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, null);
+        } else {
+            if (unionIndex876 == 1) {
+                Utf8 charSequence876;
+                Object oldString876 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(876);
+                if (oldString876 instanceof Utf8) {
+                    charSequence876 = (decoder).readString(((Utf8) oldString876));
+                } else {
+                    charSequence876 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, charSequence876);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F876': "+ unionIndex876));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex877 = (decoder.readIndex());
+        if (unionIndex877 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, null);
+        } else {
+            if (unionIndex877 == 1) {
+                Utf8 charSequence877;
+                Object oldString877 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(877);
+                if (oldString877 instanceof Utf8) {
+                    charSequence877 = (decoder).readString(((Utf8) oldString877));
+                } else {
+                    charSequence877 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, charSequence877);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F877': "+ unionIndex877));
+            }
+        }
+        int unionIndex878 = (decoder.readIndex());
+        if (unionIndex878 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, null);
+        } else {
+            if (unionIndex878 == 1) {
+                Utf8 charSequence878;
+                Object oldString878 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(878);
+                if (oldString878 instanceof Utf8) {
+                    charSequence878 = (decoder).readString(((Utf8) oldString878));
+                } else {
+                    charSequence878 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, charSequence878);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F878': "+ unionIndex878));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex879 = (decoder.readIndex());
+        if (unionIndex879 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, null);
+        } else {
+            if (unionIndex879 == 1) {
+                Utf8 charSequence879;
+                Object oldString879 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(879);
+                if (oldString879 instanceof Utf8) {
+                    charSequence879 = (decoder).readString(((Utf8) oldString879));
+                } else {
+                    charSequence879 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, charSequence879);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F879': "+ unionIndex879));
+            }
+        }
+        int unionIndex880 = (decoder.readIndex());
+        if (unionIndex880 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, null);
+        } else {
+            if (unionIndex880 == 1) {
+                Utf8 charSequence880;
+                Object oldString880 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(880);
+                if (oldString880 instanceof Utf8) {
+                    charSequence880 = (decoder).readString(((Utf8) oldString880));
+                } else {
+                    charSequence880 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, charSequence880);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F880': "+ unionIndex880));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex881 = (decoder.readIndex());
+        if (unionIndex881 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, null);
+        } else {
+            if (unionIndex881 == 1) {
+                Utf8 charSequence881;
+                Object oldString881 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(881);
+                if (oldString881 instanceof Utf8) {
+                    charSequence881 = (decoder).readString(((Utf8) oldString881));
+                } else {
+                    charSequence881 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, charSequence881);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F881': "+ unionIndex881));
+            }
+        }
+        int unionIndex882 = (decoder.readIndex());
+        if (unionIndex882 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, null);
+        } else {
+            if (unionIndex882 == 1) {
+                Utf8 charSequence882;
+                Object oldString882 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(882);
+                if (oldString882 instanceof Utf8) {
+                    charSequence882 = (decoder).readString(((Utf8) oldString882));
+                } else {
+                    charSequence882 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, charSequence882);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F882': "+ unionIndex882));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex883 = (decoder.readIndex());
+        if (unionIndex883 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, null);
+        } else {
+            if (unionIndex883 == 1) {
+                Utf8 charSequence883;
+                Object oldString883 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(883);
+                if (oldString883 instanceof Utf8) {
+                    charSequence883 = (decoder).readString(((Utf8) oldString883));
+                } else {
+                    charSequence883 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, charSequence883);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F883': "+ unionIndex883));
+            }
+        }
+        int unionIndex884 = (decoder.readIndex());
+        if (unionIndex884 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, null);
+        } else {
+            if (unionIndex884 == 1) {
+                Utf8 charSequence884;
+                Object oldString884 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(884);
+                if (oldString884 instanceof Utf8) {
+                    charSequence884 = (decoder).readString(((Utf8) oldString884));
+                } else {
+                    charSequence884 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, charSequence884);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F884': "+ unionIndex884));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex885 = (decoder.readIndex());
+        if (unionIndex885 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, null);
+        } else {
+            if (unionIndex885 == 1) {
+                Utf8 charSequence885;
+                Object oldString885 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(885);
+                if (oldString885 instanceof Utf8) {
+                    charSequence885 = (decoder).readString(((Utf8) oldString885));
+                } else {
+                    charSequence885 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, charSequence885);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F885': "+ unionIndex885));
+            }
+        }
+        int unionIndex886 = (decoder.readIndex());
+        if (unionIndex886 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, null);
+        } else {
+            if (unionIndex886 == 1) {
+                Utf8 charSequence886;
+                Object oldString886 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(886);
+                if (oldString886 instanceof Utf8) {
+                    charSequence886 = (decoder).readString(((Utf8) oldString886));
+                } else {
+                    charSequence886 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, charSequence886);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F886': "+ unionIndex886));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex887 = (decoder.readIndex());
+        if (unionIndex887 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, null);
+        } else {
+            if (unionIndex887 == 1) {
+                Utf8 charSequence887;
+                Object oldString887 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(887);
+                if (oldString887 instanceof Utf8) {
+                    charSequence887 = (decoder).readString(((Utf8) oldString887));
+                } else {
+                    charSequence887 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, charSequence887);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F887': "+ unionIndex887));
+            }
+        }
+        int unionIndex888 = (decoder.readIndex());
+        if (unionIndex888 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, null);
+        } else {
+            if (unionIndex888 == 1) {
+                Utf8 charSequence888;
+                Object oldString888 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(888);
+                if (oldString888 instanceof Utf8) {
+                    charSequence888 = (decoder).readString(((Utf8) oldString888));
+                } else {
+                    charSequence888 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, charSequence888);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F888': "+ unionIndex888));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex889 = (decoder.readIndex());
+        if (unionIndex889 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, null);
+        } else {
+            if (unionIndex889 == 1) {
+                Utf8 charSequence889;
+                Object oldString889 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(889);
+                if (oldString889 instanceof Utf8) {
+                    charSequence889 = (decoder).readString(((Utf8) oldString889));
+                } else {
+                    charSequence889 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, charSequence889);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F889': "+ unionIndex889));
+            }
+        }
+        int unionIndex890 = (decoder.readIndex());
+        if (unionIndex890 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, null);
+        } else {
+            if (unionIndex890 == 1) {
+                Utf8 charSequence890;
+                Object oldString890 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(890);
+                if (oldString890 instanceof Utf8) {
+                    charSequence890 = (decoder).readString(((Utf8) oldString890));
+                } else {
+                    charSequence890 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, charSequence890);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F890': "+ unionIndex890));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex891 = (decoder.readIndex());
+        if (unionIndex891 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, null);
+        } else {
+            if (unionIndex891 == 1) {
+                Utf8 charSequence891;
+                Object oldString891 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(891);
+                if (oldString891 instanceof Utf8) {
+                    charSequence891 = (decoder).readString(((Utf8) oldString891));
+                } else {
+                    charSequence891 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, charSequence891);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F891': "+ unionIndex891));
+            }
+        }
+        int unionIndex892 = (decoder.readIndex());
+        if (unionIndex892 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, null);
+        } else {
+            if (unionIndex892 == 1) {
+                Utf8 charSequence892;
+                Object oldString892 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(892);
+                if (oldString892 instanceof Utf8) {
+                    charSequence892 = (decoder).readString(((Utf8) oldString892));
+                } else {
+                    charSequence892 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, charSequence892);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F892': "+ unionIndex892));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex893 = (decoder.readIndex());
+        if (unionIndex893 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, null);
+        } else {
+            if (unionIndex893 == 1) {
+                Utf8 charSequence893;
+                Object oldString893 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(893);
+                if (oldString893 instanceof Utf8) {
+                    charSequence893 = (decoder).readString(((Utf8) oldString893));
+                } else {
+                    charSequence893 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, charSequence893);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F893': "+ unionIndex893));
+            }
+        }
+        int unionIndex894 = (decoder.readIndex());
+        if (unionIndex894 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, null);
+        } else {
+            if (unionIndex894 == 1) {
+                Utf8 charSequence894;
+                Object oldString894 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(894);
+                if (oldString894 instanceof Utf8) {
+                    charSequence894 = (decoder).readString(((Utf8) oldString894));
+                } else {
+                    charSequence894 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, charSequence894);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F894': "+ unionIndex894));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex895 = (decoder.readIndex());
+        if (unionIndex895 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, null);
+        } else {
+            if (unionIndex895 == 1) {
+                Utf8 charSequence895;
+                Object oldString895 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(895);
+                if (oldString895 instanceof Utf8) {
+                    charSequence895 = (decoder).readString(((Utf8) oldString895));
+                } else {
+                    charSequence895 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, charSequence895);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F895': "+ unionIndex895));
+            }
+        }
+        int unionIndex896 = (decoder.readIndex());
+        if (unionIndex896 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, null);
+        } else {
+            if (unionIndex896 == 1) {
+                Utf8 charSequence896;
+                Object oldString896 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(896);
+                if (oldString896 instanceof Utf8) {
+                    charSequence896 = (decoder).readString(((Utf8) oldString896));
+                } else {
+                    charSequence896 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, charSequence896);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F896': "+ unionIndex896));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex897 = (decoder.readIndex());
+        if (unionIndex897 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, null);
+        } else {
+            if (unionIndex897 == 1) {
+                Utf8 charSequence897;
+                Object oldString897 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(897);
+                if (oldString897 instanceof Utf8) {
+                    charSequence897 = (decoder).readString(((Utf8) oldString897));
+                } else {
+                    charSequence897 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, charSequence897);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F897': "+ unionIndex897));
+            }
+        }
+        int unionIndex898 = (decoder.readIndex());
+        if (unionIndex898 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, null);
+        } else {
+            if (unionIndex898 == 1) {
+                Utf8 charSequence898;
+                Object oldString898 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(898);
+                if (oldString898 instanceof Utf8) {
+                    charSequence898 = (decoder).readString(((Utf8) oldString898));
+                } else {
+                    charSequence898 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, charSequence898);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F898': "+ unionIndex898));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex899 = (decoder.readIndex());
+        if (unionIndex899 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, null);
+        } else {
+            if (unionIndex899 == 1) {
+                Utf8 charSequence899;
+                Object oldString899 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(899);
+                if (oldString899 instanceof Utf8) {
+                    charSequence899 = (decoder).readString(((Utf8) oldString899));
+                } else {
+                    charSequence899 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, charSequence899);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F899': "+ unionIndex899));
+            }
+        }
+        int unionIndex900 = (decoder.readIndex());
+        if (unionIndex900 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, null);
+        } else {
+            if (unionIndex900 == 1) {
+                Utf8 charSequence900;
+                Object oldString900 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(900);
+                if (oldString900 instanceof Utf8) {
+                    charSequence900 = (decoder).readString(((Utf8) oldString900));
+                } else {
+                    charSequence900 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, charSequence900);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F900': "+ unionIndex900));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex901 = (decoder.readIndex());
+        if (unionIndex901 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, null);
+        } else {
+            if (unionIndex901 == 1) {
+                Utf8 charSequence901;
+                Object oldString901 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(901);
+                if (oldString901 instanceof Utf8) {
+                    charSequence901 = (decoder).readString(((Utf8) oldString901));
+                } else {
+                    charSequence901 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, charSequence901);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F901': "+ unionIndex901));
+            }
+        }
+        int unionIndex902 = (decoder.readIndex());
+        if (unionIndex902 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, null);
+        } else {
+            if (unionIndex902 == 1) {
+                Utf8 charSequence902;
+                Object oldString902 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(902);
+                if (oldString902 instanceof Utf8) {
+                    charSequence902 = (decoder).readString(((Utf8) oldString902));
+                } else {
+                    charSequence902 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, charSequence902);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F902': "+ unionIndex902));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex903 = (decoder.readIndex());
+        if (unionIndex903 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, null);
+        } else {
+            if (unionIndex903 == 1) {
+                Utf8 charSequence903;
+                Object oldString903 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(903);
+                if (oldString903 instanceof Utf8) {
+                    charSequence903 = (decoder).readString(((Utf8) oldString903));
+                } else {
+                    charSequence903 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, charSequence903);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F903': "+ unionIndex903));
+            }
+        }
+        int unionIndex904 = (decoder.readIndex());
+        if (unionIndex904 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, null);
+        } else {
+            if (unionIndex904 == 1) {
+                Utf8 charSequence904;
+                Object oldString904 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(904);
+                if (oldString904 instanceof Utf8) {
+                    charSequence904 = (decoder).readString(((Utf8) oldString904));
+                } else {
+                    charSequence904 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, charSequence904);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F904': "+ unionIndex904));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex905 = (decoder.readIndex());
+        if (unionIndex905 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, null);
+        } else {
+            if (unionIndex905 == 1) {
+                Utf8 charSequence905;
+                Object oldString905 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(905);
+                if (oldString905 instanceof Utf8) {
+                    charSequence905 = (decoder).readString(((Utf8) oldString905));
+                } else {
+                    charSequence905 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, charSequence905);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F905': "+ unionIndex905));
+            }
+        }
+        int unionIndex906 = (decoder.readIndex());
+        if (unionIndex906 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, null);
+        } else {
+            if (unionIndex906 == 1) {
+                Utf8 charSequence906;
+                Object oldString906 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(906);
+                if (oldString906 instanceof Utf8) {
+                    charSequence906 = (decoder).readString(((Utf8) oldString906));
+                } else {
+                    charSequence906 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, charSequence906);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F906': "+ unionIndex906));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex907 = (decoder.readIndex());
+        if (unionIndex907 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, null);
+        } else {
+            if (unionIndex907 == 1) {
+                Utf8 charSequence907;
+                Object oldString907 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(907);
+                if (oldString907 instanceof Utf8) {
+                    charSequence907 = (decoder).readString(((Utf8) oldString907));
+                } else {
+                    charSequence907 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, charSequence907);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F907': "+ unionIndex907));
+            }
+        }
+        int unionIndex908 = (decoder.readIndex());
+        if (unionIndex908 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, null);
+        } else {
+            if (unionIndex908 == 1) {
+                Utf8 charSequence908;
+                Object oldString908 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(908);
+                if (oldString908 instanceof Utf8) {
+                    charSequence908 = (decoder).readString(((Utf8) oldString908));
+                } else {
+                    charSequence908 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, charSequence908);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F908': "+ unionIndex908));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex909 = (decoder.readIndex());
+        if (unionIndex909 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, null);
+        } else {
+            if (unionIndex909 == 1) {
+                Utf8 charSequence909;
+                Object oldString909 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(909);
+                if (oldString909 instanceof Utf8) {
+                    charSequence909 = (decoder).readString(((Utf8) oldString909));
+                } else {
+                    charSequence909 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, charSequence909);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F909': "+ unionIndex909));
+            }
+        }
+        int unionIndex910 = (decoder.readIndex());
+        if (unionIndex910 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, null);
+        } else {
+            if (unionIndex910 == 1) {
+                Utf8 charSequence910;
+                Object oldString910 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(910);
+                if (oldString910 instanceof Utf8) {
+                    charSequence910 = (decoder).readString(((Utf8) oldString910));
+                } else {
+                    charSequence910 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, charSequence910);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F910': "+ unionIndex910));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex911 = (decoder.readIndex());
+        if (unionIndex911 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, null);
+        } else {
+            if (unionIndex911 == 1) {
+                Utf8 charSequence911;
+                Object oldString911 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(911);
+                if (oldString911 instanceof Utf8) {
+                    charSequence911 = (decoder).readString(((Utf8) oldString911));
+                } else {
+                    charSequence911 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, charSequence911);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F911': "+ unionIndex911));
+            }
+        }
+        int unionIndex912 = (decoder.readIndex());
+        if (unionIndex912 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, null);
+        } else {
+            if (unionIndex912 == 1) {
+                Utf8 charSequence912;
+                Object oldString912 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(912);
+                if (oldString912 instanceof Utf8) {
+                    charSequence912 = (decoder).readString(((Utf8) oldString912));
+                } else {
+                    charSequence912 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, charSequence912);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F912': "+ unionIndex912));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex913 = (decoder.readIndex());
+        if (unionIndex913 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, null);
+        } else {
+            if (unionIndex913 == 1) {
+                Utf8 charSequence913;
+                Object oldString913 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(913);
+                if (oldString913 instanceof Utf8) {
+                    charSequence913 = (decoder).readString(((Utf8) oldString913));
+                } else {
+                    charSequence913 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, charSequence913);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F913': "+ unionIndex913));
+            }
+        }
+        int unionIndex914 = (decoder.readIndex());
+        if (unionIndex914 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, null);
+        } else {
+            if (unionIndex914 == 1) {
+                Utf8 charSequence914;
+                Object oldString914 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(914);
+                if (oldString914 instanceof Utf8) {
+                    charSequence914 = (decoder).readString(((Utf8) oldString914));
+                } else {
+                    charSequence914 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, charSequence914);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F914': "+ unionIndex914));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex915 = (decoder.readIndex());
+        if (unionIndex915 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, null);
+        } else {
+            if (unionIndex915 == 1) {
+                Utf8 charSequence915;
+                Object oldString915 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(915);
+                if (oldString915 instanceof Utf8) {
+                    charSequence915 = (decoder).readString(((Utf8) oldString915));
+                } else {
+                    charSequence915 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, charSequence915);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F915': "+ unionIndex915));
+            }
+        }
+        int unionIndex916 = (decoder.readIndex());
+        if (unionIndex916 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, null);
+        } else {
+            if (unionIndex916 == 1) {
+                Utf8 charSequence916;
+                Object oldString916 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(916);
+                if (oldString916 instanceof Utf8) {
+                    charSequence916 = (decoder).readString(((Utf8) oldString916));
+                } else {
+                    charSequence916 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, charSequence916);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F916': "+ unionIndex916));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex917 = (decoder.readIndex());
+        if (unionIndex917 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, null);
+        } else {
+            if (unionIndex917 == 1) {
+                Utf8 charSequence917;
+                Object oldString917 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(917);
+                if (oldString917 instanceof Utf8) {
+                    charSequence917 = (decoder).readString(((Utf8) oldString917));
+                } else {
+                    charSequence917 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, charSequence917);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F917': "+ unionIndex917));
+            }
+        }
+        int unionIndex918 = (decoder.readIndex());
+        if (unionIndex918 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, null);
+        } else {
+            if (unionIndex918 == 1) {
+                Utf8 charSequence918;
+                Object oldString918 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(918);
+                if (oldString918 instanceof Utf8) {
+                    charSequence918 = (decoder).readString(((Utf8) oldString918));
+                } else {
+                    charSequence918 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, charSequence918);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F918': "+ unionIndex918));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex919 = (decoder.readIndex());
+        if (unionIndex919 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, null);
+        } else {
+            if (unionIndex919 == 1) {
+                Utf8 charSequence919;
+                Object oldString919 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(919);
+                if (oldString919 instanceof Utf8) {
+                    charSequence919 = (decoder).readString(((Utf8) oldString919));
+                } else {
+                    charSequence919 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, charSequence919);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F919': "+ unionIndex919));
+            }
+        }
+        int unionIndex920 = (decoder.readIndex());
+        if (unionIndex920 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, null);
+        } else {
+            if (unionIndex920 == 1) {
+                Utf8 charSequence920;
+                Object oldString920 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(920);
+                if (oldString920 instanceof Utf8) {
+                    charSequence920 = (decoder).readString(((Utf8) oldString920));
+                } else {
+                    charSequence920 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, charSequence920);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F920': "+ unionIndex920));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex921 = (decoder.readIndex());
+        if (unionIndex921 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, null);
+        } else {
+            if (unionIndex921 == 1) {
+                Utf8 charSequence921;
+                Object oldString921 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(921);
+                if (oldString921 instanceof Utf8) {
+                    charSequence921 = (decoder).readString(((Utf8) oldString921));
+                } else {
+                    charSequence921 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, charSequence921);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F921': "+ unionIndex921));
+            }
+        }
+        int unionIndex922 = (decoder.readIndex());
+        if (unionIndex922 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, null);
+        } else {
+            if (unionIndex922 == 1) {
+                Utf8 charSequence922;
+                Object oldString922 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(922);
+                if (oldString922 instanceof Utf8) {
+                    charSequence922 = (decoder).readString(((Utf8) oldString922));
+                } else {
+                    charSequence922 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, charSequence922);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F922': "+ unionIndex922));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex923 = (decoder.readIndex());
+        if (unionIndex923 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, null);
+        } else {
+            if (unionIndex923 == 1) {
+                Utf8 charSequence923;
+                Object oldString923 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(923);
+                if (oldString923 instanceof Utf8) {
+                    charSequence923 = (decoder).readString(((Utf8) oldString923));
+                } else {
+                    charSequence923 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, charSequence923);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F923': "+ unionIndex923));
+            }
+        }
+        int unionIndex924 = (decoder.readIndex());
+        if (unionIndex924 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, null);
+        } else {
+            if (unionIndex924 == 1) {
+                Utf8 charSequence924;
+                Object oldString924 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(924);
+                if (oldString924 instanceof Utf8) {
+                    charSequence924 = (decoder).readString(((Utf8) oldString924));
+                } else {
+                    charSequence924 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, charSequence924);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F924': "+ unionIndex924));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex925 = (decoder.readIndex());
+        if (unionIndex925 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, null);
+        } else {
+            if (unionIndex925 == 1) {
+                Utf8 charSequence925;
+                Object oldString925 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(925);
+                if (oldString925 instanceof Utf8) {
+                    charSequence925 = (decoder).readString(((Utf8) oldString925));
+                } else {
+                    charSequence925 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, charSequence925);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F925': "+ unionIndex925));
+            }
+        }
+        int unionIndex926 = (decoder.readIndex());
+        if (unionIndex926 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, null);
+        } else {
+            if (unionIndex926 == 1) {
+                Utf8 charSequence926;
+                Object oldString926 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(926);
+                if (oldString926 instanceof Utf8) {
+                    charSequence926 = (decoder).readString(((Utf8) oldString926));
+                } else {
+                    charSequence926 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, charSequence926);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F926': "+ unionIndex926));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex927 = (decoder.readIndex());
+        if (unionIndex927 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, null);
+        } else {
+            if (unionIndex927 == 1) {
+                Utf8 charSequence927;
+                Object oldString927 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(927);
+                if (oldString927 instanceof Utf8) {
+                    charSequence927 = (decoder).readString(((Utf8) oldString927));
+                } else {
+                    charSequence927 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, charSequence927);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F927': "+ unionIndex927));
+            }
+        }
+        int unionIndex928 = (decoder.readIndex());
+        if (unionIndex928 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, null);
+        } else {
+            if (unionIndex928 == 1) {
+                Utf8 charSequence928;
+                Object oldString928 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(928);
+                if (oldString928 instanceof Utf8) {
+                    charSequence928 = (decoder).readString(((Utf8) oldString928));
+                } else {
+                    charSequence928 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, charSequence928);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F928': "+ unionIndex928));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex929 = (decoder.readIndex());
+        if (unionIndex929 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, null);
+        } else {
+            if (unionIndex929 == 1) {
+                Utf8 charSequence929;
+                Object oldString929 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(929);
+                if (oldString929 instanceof Utf8) {
+                    charSequence929 = (decoder).readString(((Utf8) oldString929));
+                } else {
+                    charSequence929 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, charSequence929);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F929': "+ unionIndex929));
+            }
+        }
+        int unionIndex930 = (decoder.readIndex());
+        if (unionIndex930 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, null);
+        } else {
+            if (unionIndex930 == 1) {
+                Utf8 charSequence930;
+                Object oldString930 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(930);
+                if (oldString930 instanceof Utf8) {
+                    charSequence930 = (decoder).readString(((Utf8) oldString930));
+                } else {
+                    charSequence930 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, charSequence930);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F930': "+ unionIndex930));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex931 = (decoder.readIndex());
+        if (unionIndex931 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, null);
+        } else {
+            if (unionIndex931 == 1) {
+                Utf8 charSequence931;
+                Object oldString931 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(931);
+                if (oldString931 instanceof Utf8) {
+                    charSequence931 = (decoder).readString(((Utf8) oldString931));
+                } else {
+                    charSequence931 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, charSequence931);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F931': "+ unionIndex931));
+            }
+        }
+        int unionIndex932 = (decoder.readIndex());
+        if (unionIndex932 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, null);
+        } else {
+            if (unionIndex932 == 1) {
+                Utf8 charSequence932;
+                Object oldString932 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(932);
+                if (oldString932 instanceof Utf8) {
+                    charSequence932 = (decoder).readString(((Utf8) oldString932));
+                } else {
+                    charSequence932 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, charSequence932);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F932': "+ unionIndex932));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex933 = (decoder.readIndex());
+        if (unionIndex933 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, null);
+        } else {
+            if (unionIndex933 == 1) {
+                Utf8 charSequence933;
+                Object oldString933 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(933);
+                if (oldString933 instanceof Utf8) {
+                    charSequence933 = (decoder).readString(((Utf8) oldString933));
+                } else {
+                    charSequence933 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, charSequence933);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F933': "+ unionIndex933));
+            }
+        }
+        int unionIndex934 = (decoder.readIndex());
+        if (unionIndex934 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, null);
+        } else {
+            if (unionIndex934 == 1) {
+                Utf8 charSequence934;
+                Object oldString934 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(934);
+                if (oldString934 instanceof Utf8) {
+                    charSequence934 = (decoder).readString(((Utf8) oldString934));
+                } else {
+                    charSequence934 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, charSequence934);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F934': "+ unionIndex934));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex935 = (decoder.readIndex());
+        if (unionIndex935 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, null);
+        } else {
+            if (unionIndex935 == 1) {
+                Utf8 charSequence935;
+                Object oldString935 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(935);
+                if (oldString935 instanceof Utf8) {
+                    charSequence935 = (decoder).readString(((Utf8) oldString935));
+                } else {
+                    charSequence935 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, charSequence935);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F935': "+ unionIndex935));
+            }
+        }
+        int unionIndex936 = (decoder.readIndex());
+        if (unionIndex936 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, null);
+        } else {
+            if (unionIndex936 == 1) {
+                Utf8 charSequence936;
+                Object oldString936 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(936);
+                if (oldString936 instanceof Utf8) {
+                    charSequence936 = (decoder).readString(((Utf8) oldString936));
+                } else {
+                    charSequence936 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, charSequence936);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F936': "+ unionIndex936));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex937 = (decoder.readIndex());
+        if (unionIndex937 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, null);
+        } else {
+            if (unionIndex937 == 1) {
+                Utf8 charSequence937;
+                Object oldString937 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(937);
+                if (oldString937 instanceof Utf8) {
+                    charSequence937 = (decoder).readString(((Utf8) oldString937));
+                } else {
+                    charSequence937 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, charSequence937);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F937': "+ unionIndex937));
+            }
+        }
+        int unionIndex938 = (decoder.readIndex());
+        if (unionIndex938 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, null);
+        } else {
+            if (unionIndex938 == 1) {
+                Utf8 charSequence938;
+                Object oldString938 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(938);
+                if (oldString938 instanceof Utf8) {
+                    charSequence938 = (decoder).readString(((Utf8) oldString938));
+                } else {
+                    charSequence938 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, charSequence938);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F938': "+ unionIndex938));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex939 = (decoder.readIndex());
+        if (unionIndex939 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, null);
+        } else {
+            if (unionIndex939 == 1) {
+                Utf8 charSequence939;
+                Object oldString939 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(939);
+                if (oldString939 instanceof Utf8) {
+                    charSequence939 = (decoder).readString(((Utf8) oldString939));
+                } else {
+                    charSequence939 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, charSequence939);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F939': "+ unionIndex939));
+            }
+        }
+        int unionIndex940 = (decoder.readIndex());
+        if (unionIndex940 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, null);
+        } else {
+            if (unionIndex940 == 1) {
+                Utf8 charSequence940;
+                Object oldString940 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(940);
+                if (oldString940 instanceof Utf8) {
+                    charSequence940 = (decoder).readString(((Utf8) oldString940));
+                } else {
+                    charSequence940 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, charSequence940);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F940': "+ unionIndex940));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex941 = (decoder.readIndex());
+        if (unionIndex941 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, null);
+        } else {
+            if (unionIndex941 == 1) {
+                Utf8 charSequence941;
+                Object oldString941 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(941);
+                if (oldString941 instanceof Utf8) {
+                    charSequence941 = (decoder).readString(((Utf8) oldString941));
+                } else {
+                    charSequence941 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, charSequence941);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F941': "+ unionIndex941));
+            }
+        }
+        int unionIndex942 = (decoder.readIndex());
+        if (unionIndex942 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, null);
+        } else {
+            if (unionIndex942 == 1) {
+                Utf8 charSequence942;
+                Object oldString942 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(942);
+                if (oldString942 instanceof Utf8) {
+                    charSequence942 = (decoder).readString(((Utf8) oldString942));
+                } else {
+                    charSequence942 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, charSequence942);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F942': "+ unionIndex942));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex943 = (decoder.readIndex());
+        if (unionIndex943 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, null);
+        } else {
+            if (unionIndex943 == 1) {
+                Utf8 charSequence943;
+                Object oldString943 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(943);
+                if (oldString943 instanceof Utf8) {
+                    charSequence943 = (decoder).readString(((Utf8) oldString943));
+                } else {
+                    charSequence943 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, charSequence943);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F943': "+ unionIndex943));
+            }
+        }
+        int unionIndex944 = (decoder.readIndex());
+        if (unionIndex944 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, null);
+        } else {
+            if (unionIndex944 == 1) {
+                Utf8 charSequence944;
+                Object oldString944 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(944);
+                if (oldString944 instanceof Utf8) {
+                    charSequence944 = (decoder).readString(((Utf8) oldString944));
+                } else {
+                    charSequence944 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, charSequence944);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F944': "+ unionIndex944));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex945 = (decoder.readIndex());
+        if (unionIndex945 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, null);
+        } else {
+            if (unionIndex945 == 1) {
+                Utf8 charSequence945;
+                Object oldString945 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(945);
+                if (oldString945 instanceof Utf8) {
+                    charSequence945 = (decoder).readString(((Utf8) oldString945));
+                } else {
+                    charSequence945 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, charSequence945);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F945': "+ unionIndex945));
+            }
+        }
+        int unionIndex946 = (decoder.readIndex());
+        if (unionIndex946 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, null);
+        } else {
+            if (unionIndex946 == 1) {
+                Utf8 charSequence946;
+                Object oldString946 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(946);
+                if (oldString946 instanceof Utf8) {
+                    charSequence946 = (decoder).readString(((Utf8) oldString946));
+                } else {
+                    charSequence946 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, charSequence946);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F946': "+ unionIndex946));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex947 = (decoder.readIndex());
+        if (unionIndex947 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, null);
+        } else {
+            if (unionIndex947 == 1) {
+                Utf8 charSequence947;
+                Object oldString947 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(947);
+                if (oldString947 instanceof Utf8) {
+                    charSequence947 = (decoder).readString(((Utf8) oldString947));
+                } else {
+                    charSequence947 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, charSequence947);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F947': "+ unionIndex947));
+            }
+        }
+        int unionIndex948 = (decoder.readIndex());
+        if (unionIndex948 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, null);
+        } else {
+            if (unionIndex948 == 1) {
+                Utf8 charSequence948;
+                Object oldString948 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(948);
+                if (oldString948 instanceof Utf8) {
+                    charSequence948 = (decoder).readString(((Utf8) oldString948));
+                } else {
+                    charSequence948 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, charSequence948);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F948': "+ unionIndex948));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex949 = (decoder.readIndex());
+        if (unionIndex949 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, null);
+        } else {
+            if (unionIndex949 == 1) {
+                Utf8 charSequence949;
+                Object oldString949 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(949);
+                if (oldString949 instanceof Utf8) {
+                    charSequence949 = (decoder).readString(((Utf8) oldString949));
+                } else {
+                    charSequence949 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, charSequence949);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F949': "+ unionIndex949));
+            }
+        }
+        int unionIndex950 = (decoder.readIndex());
+        if (unionIndex950 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, null);
+        } else {
+            if (unionIndex950 == 1) {
+                Utf8 charSequence950;
+                Object oldString950 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(950);
+                if (oldString950 instanceof Utf8) {
+                    charSequence950 = (decoder).readString(((Utf8) oldString950));
+                } else {
+                    charSequence950 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, charSequence950);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F950': "+ unionIndex950));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex951 = (decoder.readIndex());
+        if (unionIndex951 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, null);
+        } else {
+            if (unionIndex951 == 1) {
+                Utf8 charSequence951;
+                Object oldString951 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(951);
+                if (oldString951 instanceof Utf8) {
+                    charSequence951 = (decoder).readString(((Utf8) oldString951));
+                } else {
+                    charSequence951 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, charSequence951);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F951': "+ unionIndex951));
+            }
+        }
+        int unionIndex952 = (decoder.readIndex());
+        if (unionIndex952 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, null);
+        } else {
+            if (unionIndex952 == 1) {
+                Utf8 charSequence952;
+                Object oldString952 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(952);
+                if (oldString952 instanceof Utf8) {
+                    charSequence952 = (decoder).readString(((Utf8) oldString952));
+                } else {
+                    charSequence952 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, charSequence952);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F952': "+ unionIndex952));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex953 = (decoder.readIndex());
+        if (unionIndex953 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, null);
+        } else {
+            if (unionIndex953 == 1) {
+                Utf8 charSequence953;
+                Object oldString953 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(953);
+                if (oldString953 instanceof Utf8) {
+                    charSequence953 = (decoder).readString(((Utf8) oldString953));
+                } else {
+                    charSequence953 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, charSequence953);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F953': "+ unionIndex953));
+            }
+        }
+        int unionIndex954 = (decoder.readIndex());
+        if (unionIndex954 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, null);
+        } else {
+            if (unionIndex954 == 1) {
+                Utf8 charSequence954;
+                Object oldString954 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(954);
+                if (oldString954 instanceof Utf8) {
+                    charSequence954 = (decoder).readString(((Utf8) oldString954));
+                } else {
+                    charSequence954 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, charSequence954);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F954': "+ unionIndex954));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex955 = (decoder.readIndex());
+        if (unionIndex955 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, null);
+        } else {
+            if (unionIndex955 == 1) {
+                Utf8 charSequence955;
+                Object oldString955 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(955);
+                if (oldString955 instanceof Utf8) {
+                    charSequence955 = (decoder).readString(((Utf8) oldString955));
+                } else {
+                    charSequence955 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, charSequence955);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F955': "+ unionIndex955));
+            }
+        }
+        int unionIndex956 = (decoder.readIndex());
+        if (unionIndex956 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, null);
+        } else {
+            if (unionIndex956 == 1) {
+                Utf8 charSequence956;
+                Object oldString956 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(956);
+                if (oldString956 instanceof Utf8) {
+                    charSequence956 = (decoder).readString(((Utf8) oldString956));
+                } else {
+                    charSequence956 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, charSequence956);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F956': "+ unionIndex956));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex957 = (decoder.readIndex());
+        if (unionIndex957 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, null);
+        } else {
+            if (unionIndex957 == 1) {
+                Utf8 charSequence957;
+                Object oldString957 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(957);
+                if (oldString957 instanceof Utf8) {
+                    charSequence957 = (decoder).readString(((Utf8) oldString957));
+                } else {
+                    charSequence957 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, charSequence957);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F957': "+ unionIndex957));
+            }
+        }
+        int unionIndex958 = (decoder.readIndex());
+        if (unionIndex958 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, null);
+        } else {
+            if (unionIndex958 == 1) {
+                Utf8 charSequence958;
+                Object oldString958 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(958);
+                if (oldString958 instanceof Utf8) {
+                    charSequence958 = (decoder).readString(((Utf8) oldString958));
+                } else {
+                    charSequence958 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, charSequence958);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F958': "+ unionIndex958));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex959 = (decoder.readIndex());
+        if (unionIndex959 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, null);
+        } else {
+            if (unionIndex959 == 1) {
+                Utf8 charSequence959;
+                Object oldString959 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(959);
+                if (oldString959 instanceof Utf8) {
+                    charSequence959 = (decoder).readString(((Utf8) oldString959));
+                } else {
+                    charSequence959 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, charSequence959);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F959': "+ unionIndex959));
+            }
+        }
+        int unionIndex960 = (decoder.readIndex());
+        if (unionIndex960 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, null);
+        } else {
+            if (unionIndex960 == 1) {
+                Utf8 charSequence960;
+                Object oldString960 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(960);
+                if (oldString960 instanceof Utf8) {
+                    charSequence960 = (decoder).readString(((Utf8) oldString960));
+                } else {
+                    charSequence960 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, charSequence960);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F960': "+ unionIndex960));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex961 = (decoder.readIndex());
+        if (unionIndex961 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, null);
+        } else {
+            if (unionIndex961 == 1) {
+                Utf8 charSequence961;
+                Object oldString961 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(961);
+                if (oldString961 instanceof Utf8) {
+                    charSequence961 = (decoder).readString(((Utf8) oldString961));
+                } else {
+                    charSequence961 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, charSequence961);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F961': "+ unionIndex961));
+            }
+        }
+        int unionIndex962 = (decoder.readIndex());
+        if (unionIndex962 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, null);
+        } else {
+            if (unionIndex962 == 1) {
+                Utf8 charSequence962;
+                Object oldString962 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(962);
+                if (oldString962 instanceof Utf8) {
+                    charSequence962 = (decoder).readString(((Utf8) oldString962));
+                } else {
+                    charSequence962 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, charSequence962);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F962': "+ unionIndex962));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex963 = (decoder.readIndex());
+        if (unionIndex963 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, null);
+        } else {
+            if (unionIndex963 == 1) {
+                Utf8 charSequence963;
+                Object oldString963 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(963);
+                if (oldString963 instanceof Utf8) {
+                    charSequence963 = (decoder).readString(((Utf8) oldString963));
+                } else {
+                    charSequence963 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, charSequence963);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F963': "+ unionIndex963));
+            }
+        }
+        int unionIndex964 = (decoder.readIndex());
+        if (unionIndex964 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, null);
+        } else {
+            if (unionIndex964 == 1) {
+                Utf8 charSequence964;
+                Object oldString964 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(964);
+                if (oldString964 instanceof Utf8) {
+                    charSequence964 = (decoder).readString(((Utf8) oldString964));
+                } else {
+                    charSequence964 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, charSequence964);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F964': "+ unionIndex964));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex965 = (decoder.readIndex());
+        if (unionIndex965 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, null);
+        } else {
+            if (unionIndex965 == 1) {
+                Utf8 charSequence965;
+                Object oldString965 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(965);
+                if (oldString965 instanceof Utf8) {
+                    charSequence965 = (decoder).readString(((Utf8) oldString965));
+                } else {
+                    charSequence965 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, charSequence965);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F965': "+ unionIndex965));
+            }
+        }
+        int unionIndex966 = (decoder.readIndex());
+        if (unionIndex966 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, null);
+        } else {
+            if (unionIndex966 == 1) {
+                Utf8 charSequence966;
+                Object oldString966 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(966);
+                if (oldString966 instanceof Utf8) {
+                    charSequence966 = (decoder).readString(((Utf8) oldString966));
+                } else {
+                    charSequence966 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, charSequence966);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F966': "+ unionIndex966));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex967 = (decoder.readIndex());
+        if (unionIndex967 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, null);
+        } else {
+            if (unionIndex967 == 1) {
+                Utf8 charSequence967;
+                Object oldString967 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(967);
+                if (oldString967 instanceof Utf8) {
+                    charSequence967 = (decoder).readString(((Utf8) oldString967));
+                } else {
+                    charSequence967 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, charSequence967);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F967': "+ unionIndex967));
+            }
+        }
+        int unionIndex968 = (decoder.readIndex());
+        if (unionIndex968 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, null);
+        } else {
+            if (unionIndex968 == 1) {
+                Utf8 charSequence968;
+                Object oldString968 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(968);
+                if (oldString968 instanceof Utf8) {
+                    charSequence968 = (decoder).readString(((Utf8) oldString968));
+                } else {
+                    charSequence968 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, charSequence968);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F968': "+ unionIndex968));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex969 = (decoder.readIndex());
+        if (unionIndex969 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, null);
+        } else {
+            if (unionIndex969 == 1) {
+                Utf8 charSequence969;
+                Object oldString969 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(969);
+                if (oldString969 instanceof Utf8) {
+                    charSequence969 = (decoder).readString(((Utf8) oldString969));
+                } else {
+                    charSequence969 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, charSequence969);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F969': "+ unionIndex969));
+            }
+        }
+        int unionIndex970 = (decoder.readIndex());
+        if (unionIndex970 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, null);
+        } else {
+            if (unionIndex970 == 1) {
+                Utf8 charSequence970;
+                Object oldString970 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(970);
+                if (oldString970 instanceof Utf8) {
+                    charSequence970 = (decoder).readString(((Utf8) oldString970));
+                } else {
+                    charSequence970 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, charSequence970);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F970': "+ unionIndex970));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex971 = (decoder.readIndex());
+        if (unionIndex971 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, null);
+        } else {
+            if (unionIndex971 == 1) {
+                Utf8 charSequence971;
+                Object oldString971 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(971);
+                if (oldString971 instanceof Utf8) {
+                    charSequence971 = (decoder).readString(((Utf8) oldString971));
+                } else {
+                    charSequence971 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, charSequence971);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F971': "+ unionIndex971));
+            }
+        }
+        int unionIndex972 = (decoder.readIndex());
+        if (unionIndex972 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, null);
+        } else {
+            if (unionIndex972 == 1) {
+                Utf8 charSequence972;
+                Object oldString972 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(972);
+                if (oldString972 instanceof Utf8) {
+                    charSequence972 = (decoder).readString(((Utf8) oldString972));
+                } else {
+                    charSequence972 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, charSequence972);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F972': "+ unionIndex972));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex973 = (decoder.readIndex());
+        if (unionIndex973 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, null);
+        } else {
+            if (unionIndex973 == 1) {
+                Utf8 charSequence973;
+                Object oldString973 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(973);
+                if (oldString973 instanceof Utf8) {
+                    charSequence973 = (decoder).readString(((Utf8) oldString973));
+                } else {
+                    charSequence973 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, charSequence973);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F973': "+ unionIndex973));
+            }
+        }
+        int unionIndex974 = (decoder.readIndex());
+        if (unionIndex974 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, null);
+        } else {
+            if (unionIndex974 == 1) {
+                Utf8 charSequence974;
+                Object oldString974 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(974);
+                if (oldString974 instanceof Utf8) {
+                    charSequence974 = (decoder).readString(((Utf8) oldString974));
+                } else {
+                    charSequence974 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, charSequence974);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F974': "+ unionIndex974));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex975 = (decoder.readIndex());
+        if (unionIndex975 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, null);
+        } else {
+            if (unionIndex975 == 1) {
+                Utf8 charSequence975;
+                Object oldString975 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(975);
+                if (oldString975 instanceof Utf8) {
+                    charSequence975 = (decoder).readString(((Utf8) oldString975));
+                } else {
+                    charSequence975 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, charSequence975);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F975': "+ unionIndex975));
+            }
+        }
+        int unionIndex976 = (decoder.readIndex());
+        if (unionIndex976 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, null);
+        } else {
+            if (unionIndex976 == 1) {
+                Utf8 charSequence976;
+                Object oldString976 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(976);
+                if (oldString976 instanceof Utf8) {
+                    charSequence976 = (decoder).readString(((Utf8) oldString976));
+                } else {
+                    charSequence976 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, charSequence976);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F976': "+ unionIndex976));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex977 = (decoder.readIndex());
+        if (unionIndex977 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, null);
+        } else {
+            if (unionIndex977 == 1) {
+                Utf8 charSequence977;
+                Object oldString977 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(977);
+                if (oldString977 instanceof Utf8) {
+                    charSequence977 = (decoder).readString(((Utf8) oldString977));
+                } else {
+                    charSequence977 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, charSequence977);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F977': "+ unionIndex977));
+            }
+        }
+        int unionIndex978 = (decoder.readIndex());
+        if (unionIndex978 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, null);
+        } else {
+            if (unionIndex978 == 1) {
+                Utf8 charSequence978;
+                Object oldString978 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(978);
+                if (oldString978 instanceof Utf8) {
+                    charSequence978 = (decoder).readString(((Utf8) oldString978));
+                } else {
+                    charSequence978 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, charSequence978);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F978': "+ unionIndex978));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex979 = (decoder.readIndex());
+        if (unionIndex979 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, null);
+        } else {
+            if (unionIndex979 == 1) {
+                Utf8 charSequence979;
+                Object oldString979 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(979);
+                if (oldString979 instanceof Utf8) {
+                    charSequence979 = (decoder).readString(((Utf8) oldString979));
+                } else {
+                    charSequence979 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, charSequence979);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F979': "+ unionIndex979));
+            }
+        }
+        int unionIndex980 = (decoder.readIndex());
+        if (unionIndex980 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, null);
+        } else {
+            if (unionIndex980 == 1) {
+                Utf8 charSequence980;
+                Object oldString980 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(980);
+                if (oldString980 instanceof Utf8) {
+                    charSequence980 = (decoder).readString(((Utf8) oldString980));
+                } else {
+                    charSequence980 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, charSequence980);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F980': "+ unionIndex980));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex981 = (decoder.readIndex());
+        if (unionIndex981 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, null);
+        } else {
+            if (unionIndex981 == 1) {
+                Utf8 charSequence981;
+                Object oldString981 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(981);
+                if (oldString981 instanceof Utf8) {
+                    charSequence981 = (decoder).readString(((Utf8) oldString981));
+                } else {
+                    charSequence981 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, charSequence981);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F981': "+ unionIndex981));
+            }
+        }
+        int unionIndex982 = (decoder.readIndex());
+        if (unionIndex982 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, null);
+        } else {
+            if (unionIndex982 == 1) {
+                Utf8 charSequence982;
+                Object oldString982 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(982);
+                if (oldString982 instanceof Utf8) {
+                    charSequence982 = (decoder).readString(((Utf8) oldString982));
+                } else {
+                    charSequence982 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, charSequence982);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F982': "+ unionIndex982));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex983 = (decoder.readIndex());
+        if (unionIndex983 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, null);
+        } else {
+            if (unionIndex983 == 1) {
+                Utf8 charSequence983;
+                Object oldString983 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(983);
+                if (oldString983 instanceof Utf8) {
+                    charSequence983 = (decoder).readString(((Utf8) oldString983));
+                } else {
+                    charSequence983 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, charSequence983);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F983': "+ unionIndex983));
+            }
+        }
+        int unionIndex984 = (decoder.readIndex());
+        if (unionIndex984 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, null);
+        } else {
+            if (unionIndex984 == 1) {
+                Utf8 charSequence984;
+                Object oldString984 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(984);
+                if (oldString984 instanceof Utf8) {
+                    charSequence984 = (decoder).readString(((Utf8) oldString984));
+                } else {
+                    charSequence984 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, charSequence984);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F984': "+ unionIndex984));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex985 = (decoder.readIndex());
+        if (unionIndex985 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, null);
+        } else {
+            if (unionIndex985 == 1) {
+                Utf8 charSequence985;
+                Object oldString985 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(985);
+                if (oldString985 instanceof Utf8) {
+                    charSequence985 = (decoder).readString(((Utf8) oldString985));
+                } else {
+                    charSequence985 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, charSequence985);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F985': "+ unionIndex985));
+            }
+        }
+        int unionIndex986 = (decoder.readIndex());
+        if (unionIndex986 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, null);
+        } else {
+            if (unionIndex986 == 1) {
+                Utf8 charSequence986;
+                Object oldString986 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(986);
+                if (oldString986 instanceof Utf8) {
+                    charSequence986 = (decoder).readString(((Utf8) oldString986));
+                } else {
+                    charSequence986 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, charSequence986);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F986': "+ unionIndex986));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex987 = (decoder.readIndex());
+        if (unionIndex987 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, null);
+        } else {
+            if (unionIndex987 == 1) {
+                Utf8 charSequence987;
+                Object oldString987 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(987);
+                if (oldString987 instanceof Utf8) {
+                    charSequence987 = (decoder).readString(((Utf8) oldString987));
+                } else {
+                    charSequence987 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, charSequence987);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F987': "+ unionIndex987));
+            }
+        }
+        int unionIndex988 = (decoder.readIndex());
+        if (unionIndex988 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, null);
+        } else {
+            if (unionIndex988 == 1) {
+                Utf8 charSequence988;
+                Object oldString988 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(988);
+                if (oldString988 instanceof Utf8) {
+                    charSequence988 = (decoder).readString(((Utf8) oldString988));
+                } else {
+                    charSequence988 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, charSequence988);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F988': "+ unionIndex988));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex989 = (decoder.readIndex());
+        if (unionIndex989 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, null);
+        } else {
+            if (unionIndex989 == 1) {
+                Utf8 charSequence989;
+                Object oldString989 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(989);
+                if (oldString989 instanceof Utf8) {
+                    charSequence989 = (decoder).readString(((Utf8) oldString989));
+                } else {
+                    charSequence989 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, charSequence989);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F989': "+ unionIndex989));
+            }
+        }
+        int unionIndex990 = (decoder.readIndex());
+        if (unionIndex990 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, null);
+        } else {
+            if (unionIndex990 == 1) {
+                Utf8 charSequence990;
+                Object oldString990 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(990);
+                if (oldString990 instanceof Utf8) {
+                    charSequence990 = (decoder).readString(((Utf8) oldString990));
+                } else {
+                    charSequence990 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, charSequence990);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F990': "+ unionIndex990));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex991 = (decoder.readIndex());
+        if (unionIndex991 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, null);
+        } else {
+            if (unionIndex991 == 1) {
+                Utf8 charSequence991;
+                Object oldString991 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(991);
+                if (oldString991 instanceof Utf8) {
+                    charSequence991 = (decoder).readString(((Utf8) oldString991));
+                } else {
+                    charSequence991 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, charSequence991);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F991': "+ unionIndex991));
+            }
+        }
+        int unionIndex992 = (decoder.readIndex());
+        if (unionIndex992 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, null);
+        } else {
+            if (unionIndex992 == 1) {
+                Utf8 charSequence992;
+                Object oldString992 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(992);
+                if (oldString992 instanceof Utf8) {
+                    charSequence992 = (decoder).readString(((Utf8) oldString992));
+                } else {
+                    charSequence992 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, charSequence992);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F992': "+ unionIndex992));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex993 = (decoder.readIndex());
+        if (unionIndex993 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, null);
+        } else {
+            if (unionIndex993 == 1) {
+                Utf8 charSequence993;
+                Object oldString993 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(993);
+                if (oldString993 instanceof Utf8) {
+                    charSequence993 = (decoder).readString(((Utf8) oldString993));
+                } else {
+                    charSequence993 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, charSequence993);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F993': "+ unionIndex993));
+            }
+        }
+        int unionIndex994 = (decoder.readIndex());
+        if (unionIndex994 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, null);
+        } else {
+            if (unionIndex994 == 1) {
+                Utf8 charSequence994;
+                Object oldString994 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(994);
+                if (oldString994 instanceof Utf8) {
+                    charSequence994 = (decoder).readString(((Utf8) oldString994));
+                } else {
+                    charSequence994 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, charSequence994);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F994': "+ unionIndex994));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex995 = (decoder.readIndex());
+        if (unionIndex995 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, null);
+        } else {
+            if (unionIndex995 == 1) {
+                Utf8 charSequence995;
+                Object oldString995 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(995);
+                if (oldString995 instanceof Utf8) {
+                    charSequence995 = (decoder).readString(((Utf8) oldString995));
+                } else {
+                    charSequence995 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, charSequence995);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F995': "+ unionIndex995));
+            }
+        }
+        int unionIndex996 = (decoder.readIndex());
+        if (unionIndex996 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, null);
+        } else {
+            if (unionIndex996 == 1) {
+                Utf8 charSequence996;
+                Object oldString996 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(996);
+                if (oldString996 instanceof Utf8) {
+                    charSequence996 = (decoder).readString(((Utf8) oldString996));
+                } else {
+                    charSequence996 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, charSequence996);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F996': "+ unionIndex996));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex997 = (decoder.readIndex());
+        if (unionIndex997 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, null);
+        } else {
+            if (unionIndex997 == 1) {
+                Utf8 charSequence997;
+                Object oldString997 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(997);
+                if (oldString997 instanceof Utf8) {
+                    charSequence997 = (decoder).readString(((Utf8) oldString997));
+                } else {
+                    charSequence997 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, charSequence997);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F997': "+ unionIndex997));
+            }
+        }
+        int unionIndex998 = (decoder.readIndex());
+        if (unionIndex998 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, null);
+        } else {
+            if (unionIndex998 == 1) {
+                Utf8 charSequence998;
+                Object oldString998 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(998);
+                if (oldString998 instanceof Utf8) {
+                    charSequence998 = (decoder).readString(((Utf8) oldString998));
+                } else {
+                    charSequence998 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, charSequence998);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F998': "+ unionIndex998));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex999 = (decoder.readIndex());
+        if (unionIndex999 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, null);
+        } else {
+            if (unionIndex999 == 1) {
+                Utf8 charSequence999;
+                Object oldString999 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(999);
+                if (oldString999 instanceof Utf8) {
+                    charSequence999 = (decoder).readString(((Utf8) oldString999));
+                } else {
+                    charSequence999 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, charSequence999);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F999': "+ unionIndex999));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
new file mode 100644
index 000000000..0a4a4a976
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testString0;
+    private final Schema testStringUnionAlias0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testString0 = readerSchema.getField("testString").schema();
+        this.testStringUnionAlias0 = readerSchema.getField("testStringUnionAlias").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testString': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0((FastGenericDeserializerGeneratorTest_shouldReadAliasedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnionAlias': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java
new file mode 100644
index 000000000..f4cfb3524
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java
@@ -0,0 +1,206 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new Integer(0));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(3);
+        tempEnumMapping1 .put(new Integer(0), new Integer(0));
+        tempEnumMapping1 .put(new Integer(1), new Integer(1));
+        tempEnumMapping1 .put(new Integer(2), new Integer(0));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(3);
+        tempEnumMapping2 .put(new Integer(0), new Integer(0));
+        tempEnumMapping2 .put(new Integer(1), new Integer(1));
+        tempEnumMapping2 .put(new Integer(2), new Integer(0));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(3);
+        tempEnumMapping3 .put(new Integer(0), new Integer(0));
+        tempEnumMapping3 .put(new Integer(1), new Integer(1));
+        tempEnumMapping3 .put(new Integer(2), new Integer(0));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnumDefault0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnumDefault0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnumDefault = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnumDefault = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault0((FastGenericDeserializerGeneratorTest_shouldReadEnumDefault), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault1((FastGenericDeserializerGeneratorTest_shouldReadEnumDefault), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnumDefault;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            if (testEnumArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumArray1).reset();
+            } else {
+                testEnumArray1 .clear();
+            }
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            if (testEnumUnionArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray1).reset();
+            } else {
+                testEnumUnionArray1 .clear();
+            }
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
new file mode 100644
index 000000000..a3d2dd5ce
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
@@ -0,0 +1,130 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Schema testEnumUnion0;
+    private final Schema testEnumArray0;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(0, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            if (testEnumArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumArray1).reset();
+            } else {
+                testEnumArray1 .clear();
+            }
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                testEnumArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            if (testEnumUnionArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray1).reset();
+            } else {
+                testEnumUnionArray1 .clear();
+            }
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        testEnumUnionArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
new file mode 100644
index 000000000..b5eba4308
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
@@ -0,0 +1,166 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testFixed0;
+    private final Schema testFixedUnion0;
+    private final Schema testFixedArray0;
+    private final Schema testFixedUnionArray0;
+    private final Schema testFixedUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testFixed0 = readerSchema.getField("testFixed").schema();
+        this.testFixedUnion0 = readerSchema.getField("testFixedUnion").schema();
+        this.testFixedArray0 = readerSchema.getField("testFixedArray").schema();
+        this.testFixedUnionArray0 = readerSchema.getField("testFixedUnionArray").schema();
+        this.testFixedUnionArrayArrayElemSchema0 = testFixedUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        byte[] testFixed1;
+        Object oldFixed0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(0);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (2))) {
+            testFixed1 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed1 = ( new byte[2]);
+        }
+        decoder.readFixed(testFixed1);
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(0, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed1));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadFixed;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(1);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (2))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed2);
+                FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed2));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericFixed> testFixedArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(2);
+        if (oldArray0 instanceof List) {
+            testFixedArray1 = ((List) oldArray0);
+            if (testFixedArray1 instanceof GenericArray) {
+                ((GenericArray) testFixedArray1).reset();
+            } else {
+                testFixedArray1 .clear();
+            }
+        } else {
+            testFixedArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen0), testFixedArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed3;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (2))) {
+                    testFixed3 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed3 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed3);
+                testFixedArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed3));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(2, testFixedArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(3);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray1 = ((List) oldArray1);
+            if (testFixedUnionArray1 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray1).reset();
+            } else {
+                testFixedUnionArray1 .clear();
+            }
+        } else {
+            testFixedUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen1), testFixedUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        byte[] testFixed4;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (2))) {
+                            testFixed4 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed4 = ( new byte[2]);
+                        }
+                        decoder.readFixed(testFixed4);
+                        testFixedUnionArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed4));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(3, testFixedUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
new file mode 100644
index 000000000..5b1805bea
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
@@ -0,0 +1,102 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema union0;
+    private final Schema unionOptionSchema0;
+    private final Schema subField0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.union0 = readerSchema.getField("union").schema();
+        this.unionOptionSchema0 = union0 .getTypes().get(1);
+        this.subField0 = unionOptionSchema0 .getField("subField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence1;
+                    Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0);
+                    if (oldString1 instanceof Utf8) {
+                        charSequence1 = (decoder).readString(((Utf8) oldString1));
+                    } else {
+                        charSequence1 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, charSequence1);
+                } else {
+                    if (unionIndex0 == 3) {
+                        FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+                    }
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(unionOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
new file mode 100644
index 000000000..95e7ed9ec
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
@@ -0,0 +1,129 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapField0;
+    private final Schema mapFieldMapValueSchema0;
+    private final Schema mapFieldValueMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapField0 = readerSchema.getField("mapField").schema();
+        this.mapFieldMapValueSchema0 = mapField0 .getValueType();
+        this.mapFieldValueMapValueSchema0 = mapFieldMapValueSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Map<Utf8, List<Integer>>> mapField1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
+                if (oldMap0 instanceof Map) {
+                    mapFieldReuse0 = ((Map) oldMap0);
+                }
+                if (mapFieldReuse0 != (null)) {
+                    mapFieldReuse0 .clear();
+                    mapField1 = mapFieldReuse0;
+                } else {
+                    mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Map<Utf8, List<Integer>> mapFieldValue0 = null;
+                    long chunkLen1 = (decoder.readMapStart());
+                    if (chunkLen1 > 0) {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, ((int) chunkLen1)));
+                        } else {
+                            Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
+                            if (null instanceof Map) {
+                                mapFieldValueReuse0 = ((Map) null);
+                            }
+                            if (mapFieldValueReuse0 != (null)) {
+                                mapFieldValueReuse0 .clear();
+                                mapFieldValue0 = mapFieldValueReuse0;
+                            } else {
+                                mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                            }
+                        }
+                        do {
+                            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                                Utf8 key1 = (decoder.readString(null));
+                                PrimitiveIntList mapFieldValueValue0 = null;
+                                long chunkLen2 = (decoder.readArrayStart());
+                                if (null instanceof PrimitiveIntList) {
+                                    mapFieldValueValue0 = ((PrimitiveIntList) null);
+                                    mapFieldValueValue0 .clear();
+                                } else {
+                                    mapFieldValueValue0 = new PrimitiveIntArrayList(((int) chunkLen2));
+                                }
+                                while (chunkLen2 > 0) {
+                                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                                        mapFieldValueValue0 .addPrimitive((decoder.readInt()));
+                                    }
+                                    chunkLen2 = (decoder.arrayNext());
+                                }
+                                mapFieldValue0 .put(key1, mapFieldValueValue0);
+                            }
+                            chunkLen1 = (decoder.mapNext());
+                        } while (chunkLen1 > 0);
+                    } else {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, 0));
+                        } else {
+                            mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+                        }
+                    }
+                    mapField1 .put(key0, mapFieldValue0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), 0));
+            } else {
+                mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadNestedMap.put(0, mapField1);
+        return FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
new file mode 100644
index 000000000..c347866c6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
@@ -0,0 +1,214 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(1));
+        tempEnumMapping0 .put(new Integer(1), new Integer(0));
+        tempEnumMapping0 .put(new Integer(2), new Integer(4));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(1));
+        tempEnumMapping1 .put(new Integer(1), new Integer(0));
+        tempEnumMapping1 .put(new Integer(2), new Integer(4));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(1));
+        tempEnumMapping2 .put(new Integer(1), new Integer(0));
+        tempEnumMapping2 .put(new Integer(2), new Integer(4));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(1));
+        tempEnumMapping3 .put(new Integer(1), new Integer(0));
+        tempEnumMapping3 .put(new Integer(2), new Integer(4));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            if (testEnumArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumArray1).reset();
+            } else {
+                testEnumArray1 .clear();
+            }
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            if (testEnumUnionArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray1).reset();
+            } else {
+                testEnumUnionArray1 .clear();
+            }
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
new file mode 100644
index 000000000..0e7a2528f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
@@ -0,0 +1,209 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testIntUnion0;
+    private final Schema testStringUnion0;
+    private final Schema testLongUnion0;
+    private final Schema testDoubleUnion0;
+    private final Schema testFloatUnion0;
+    private final Schema testBooleanUnion0;
+    private final Schema testBytesUnion0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testIntUnion0 = readerSchema.getField("testIntUnion").schema();
+        this.testStringUnion0 = readerSchema.getField("testStringUnion").schema();
+        this.testLongUnion0 = readerSchema.getField("testLongUnion").schema();
+        this.testDoubleUnion0 = readerSchema.getField("testDoubleUnion").schema();
+        this.testFloatUnion0 = readerSchema.getField("testFloatUnion").schema();
+        this.testBooleanUnion0 = readerSchema.getField("testBooleanUnion").schema();
+        this.testBytesUnion0 = readerSchema.getField("testBytesUnion").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(0, (decoder.readInt()));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(2);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(2, charSequence0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(3);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex1));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(4, (decoder.readLong()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(6, (decoder.readDouble()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(8, (decoder.readFloat()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(10, (decoder.readBoolean()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(12);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(12, byteBuffer0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(13);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
new file mode 100644
index 000000000..514004256
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
@@ -0,0 +1,164 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema intFieldField0;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.intFieldField0 = record10 .getField("intField").schema();
+        this.intField0 = record10 .getField("intField").schema();
+        this.subField1 = record10 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        subRecord.put(0, null);
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            if (recordArray1 instanceof GenericArray) {
+                ((GenericArray) recordArray1).reset();
+            } else {
+                recordArray1 .clear();
+            }
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                subRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex1));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = subRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
new file mode 100644
index 000000000..c5a73103c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
@@ -0,0 +1,179 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema record20;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.record20 = readerSchema.getField("record2").schema();
+        this.intField0 = record20 .getField("intField").schema();
+        this.subField1 = record20 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex0));
+            }
+        }
+        populate_aliasedSubRecord0((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = aliasedSubRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            if (recordArray1 instanceof GenericArray) {
+                ((GenericArray) recordArray1).reset();
+            } else {
+                recordArray1 .clear();
+            }
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record20)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record20);
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                aliasedSubRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex2));
+            }
+        }
+        populate_aliasedSubRecord1((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord1(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = aliasedSubRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
new file mode 100644
index 000000000..f3f10cb28
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
@@ -0,0 +1,260 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArray0;
+    private final Schema recordsArrayArrayElemSchema0;
+    private final Schema subField0;
+    private final Schema recordsMap0;
+    private final Schema recordsArrayUnion0;
+    private final Schema recordsArrayUnionOptionSchema0;
+    private final Schema recordsArrayUnionOptionArrayElemSchema0;
+    private final Schema recordsMapUnion0;
+    private final Schema recordsMapUnionOptionSchema0;
+    private final Schema recordsMapUnionOptionMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArray0 = readerSchema.getField("recordsArray").schema();
+        this.recordsArrayArrayElemSchema0 = recordsArray0 .getElementType();
+        this.subField0 = recordsArrayArrayElemSchema0 .getField("subField").schema();
+        this.recordsMap0 = readerSchema.getField("recordsMap").schema();
+        this.recordsArrayUnion0 = readerSchema.getField("recordsArrayUnion").schema();
+        this.recordsArrayUnionOptionSchema0 = recordsArrayUnion0 .getTypes().get(1);
+        this.recordsArrayUnionOptionArrayElemSchema0 = recordsArrayUnionOptionSchema0 .getElementType();
+        this.recordsMapUnion0 = readerSchema.getField("recordsMapUnion").schema();
+        this.recordsMapUnionOptionSchema0 = recordsMapUnion0 .getTypes().get(1);
+        this.recordsMapUnionOptionMapValueSchema0 = recordsMapUnionOptionSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<IndexedRecord> recordsArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArray1 = ((List) oldArray0);
+            if (recordsArray1 instanceof GenericArray) {
+                ((GenericArray) recordsArray1).reset();
+            } else {
+                recordsArray1 .clear();
+            }
+        } else {
+            recordsArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordsArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(0, recordsArray1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayArrayElemSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> recordsMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap1 = recordsMapReuse0;
+                } else {
+                    recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), 0));
+            } else {
+                recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(1, recordsMap1);
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, null);
+        } else {
+            if (unionIndex1 == 1) {
+                List<IndexedRecord> recordsArrayUnionOption0 = null;
+                long chunkLen2 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray1);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen2), recordsArrayUnionOptionSchema0);
+                }
+                while (chunkLen2 > 0) {
+                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        int unionIndex2 = (decoder.readIndex());
+                        if (unionIndex2 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex2 == 1) {
+                                recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex2));
+                            }
+                        }
+                    }
+                    chunkLen2 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Map<Utf8, IndexedRecord> recordsMapUnionOption0 = null;
+                long chunkLen3 = (decoder.readMapStart());
+                if (chunkLen3 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), ((int) chunkLen3)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex4 = (decoder.readIndex());
+                            if (unionIndex4 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex4 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex4));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.mapNext());
+                    } while (chunkLen3 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
new file mode 100644
index 000000000..366bebd95
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
@@ -0,0 +1,394 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArrayMap0;
+    private final Schema recordsArrayMapArrayElemSchema0;
+    private final Schema recordsArrayMapElemMapValueSchema0;
+    private final Schema recordsArrayMapElemValueOptionSchema0;
+    private final Schema subField0;
+    private final Schema recordsMapArray0;
+    private final Schema recordsMapArrayMapValueSchema0;
+    private final Schema recordsMapArrayValueArrayElemSchema0;
+    private final Schema recordsArrayMapUnion0;
+    private final Schema recordsArrayMapUnionOptionArrayElemSchema0;
+    private final Schema recordsArrayMapUnionOptionElemMapValueSchema0;
+    private final Schema recordsMapArrayUnion0;
+    private final Schema recordsMapArrayUnionOptionSchema0;
+    private final Schema recordsMapArrayUnionOptionValueArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArrayMap0 = readerSchema.getField("recordsArrayMap").schema();
+        this.recordsArrayMapArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapElemMapValueSchema0 = recordsArrayMapArrayElemSchema0 .getValueType();
+        this.recordsArrayMapElemValueOptionSchema0 = recordsArrayMapElemMapValueSchema0 .getTypes().get(1);
+        this.subField0 = recordsArrayMapElemValueOptionSchema0 .getField("subField").schema();
+        this.recordsMapArray0 = readerSchema.getField("recordsMapArray").schema();
+        this.recordsMapArrayMapValueSchema0 = recordsMapArray0 .getValueType();
+        this.recordsMapArrayValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+        this.recordsArrayMapUnion0 = readerSchema.getField("recordsArrayMapUnion").schema();
+        this.recordsArrayMapUnionOptionArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapUnionOptionElemMapValueSchema0 = recordsArrayMapUnionOptionArrayElemSchema0 .getValueType();
+        this.recordsMapArrayUnion0 = readerSchema.getField("recordsMapArrayUnion").schema();
+        this.recordsMapArrayUnionOptionSchema0 = recordsMapArrayUnion0 .getTypes().get(1);
+        this.recordsMapArrayUnionOptionValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Map<Utf8, IndexedRecord>> recordsArrayMap1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArrayMap1 = ((List) oldArray0);
+            if (recordsArrayMap1 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap1).reset();
+            } else {
+                recordsArrayMap1 .clear();
+            }
+        } else {
+            recordsArrayMap1 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen0), recordsArrayMap0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Map<Utf8, IndexedRecord> recordsArrayMapElem0 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex0 = (decoder.readIndex());
+                            if (unionIndex0 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key0, null);
+                            } else {
+                                if (unionIndex0 == 1) {
+                                    recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex0));
+                                }
+                            }
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                recordsArrayMap1 .add(recordsArrayMapElem0);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(0, recordsArrayMap1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayMapElemValueOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayMapElemValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<IndexedRecord>> recordsMapArray1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray1 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    List<IndexedRecord> recordsMapArrayValue0 = null;
+                    long chunkLen3 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen3), recordsMapArrayMapValueSchema0);
+                    }
+                    while (chunkLen3 > 0) {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex2 = (decoder.readIndex());
+                            if (unionIndex2 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex2 == 1) {
+                                    recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex2));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.arrayNext());
+                    }
+                    recordsMapArray1 .put(key1, recordsMapArrayValue0);
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), 0));
+            } else {
+                recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(1, recordsMapArray1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                List<Map<Utf8, IndexedRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray1);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen4), recordsArrayMap0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen5 = (decoder.readMapStart());
+                        if (chunkLen5 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen5)));
+                            } else {
+                                Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                                    Utf8 key2 = (decoder.readString(null));
+                                    int unionIndex4 = (decoder.readIndex());
+                                    if (unionIndex4 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key2, null);
+                                    } else {
+                                        if (unionIndex4 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex4));
+                                        }
+                                    }
+                                }
+                                chunkLen5 = (decoder.mapNext());
+                            } while (chunkLen5 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readMapStart());
+                if (chunkLen6 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), ((int) chunkLen6)));
+                    } else {
+                        Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            List<IndexedRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen7 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen7), recordsMapArrayMapValueSchema0);
+                            }
+                            while (chunkLen7 > 0) {
+                                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex6 = (decoder.readIndex());
+                                    if (unionIndex6 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex6 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex6));
+                                        }
+                                    }
+                                }
+                                chunkLen7 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key3, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen6 = (decoder.mapNext());
+                    } while (chunkLen6 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
new file mode 100644
index 000000000..ffe74819e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record0;
+    private final Schema recordOptionSchema0;
+    private final Schema subField0;
+    private final Schema field0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record0 = readerSchema.getField("record").schema();
+        this.recordOptionSchema0 = record0 .getTypes().get(1);
+        this.subField0 = recordOptionSchema0 .getField("subField").schema();
+        this.field0 = readerSchema.getField("field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'record': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder), (customization)));
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(2);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
new file mode 100644
index 000000000..2999bfa74
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
@@ -0,0 +1,256 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testNotRemoved0;
+    private final Schema testNotRemoved20;
+    private final Schema subRecord0;
+    private final Schema subRecordOptionSchema0;
+    private final Schema testNotRemoved1;
+    private final Schema testNotRemoved21;
+    private final Schema subRecordMap0;
+    private final Schema subRecordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testNotRemoved0 = readerSchema.getField("testNotRemoved").schema();
+        this.testNotRemoved20 = readerSchema.getField("testNotRemoved2").schema();
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordOptionSchema0 = subRecord0 .getTypes().get(1);
+        this.testNotRemoved1 = subRecordOptionSchema0 .getField("testNotRemoved").schema();
+        this.testNotRemoved21 = subRecordOptionSchema0 .getField("testNotRemoved2").schema();
+        this.subRecordMap0 = readerSchema.getField("subRecordMap").schema();
+        this.subRecordArray0 = readerSchema.getField("subRecordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex3));
+            }
+        }
+        Map<Utf8, IndexedRecord> subRecordMap1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
+                if (oldMap0 instanceof Map) {
+                    subRecordMapReuse0 = ((Map) oldMap0);
+                }
+                if (subRecordMapReuse0 != (null)) {
+                    subRecordMapReuse0 .clear();
+                    subRecordMap1 = subRecordMapReuse0;
+                } else {
+                    subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), 0));
+            } else {
+                subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(3, subRecordMap1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordOptionSchema0);
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = subRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex4));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex5 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = subRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<IndexedRecord> subRecordArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(4);
+        if (oldArray0 instanceof List) {
+            subRecordArray1 = ((List) oldArray0);
+            if (subRecordArray1 instanceof GenericArray) {
+                ((GenericArray) subRecordArray1).reset();
+            } else {
+                subRecordArray1 .clear();
+            }
+        } else {
+            subRecordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen1), subRecordArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object subRecordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    subRecordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(4, subRecordArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
new file mode 100644
index 000000000..d4acae407
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder), (customization)));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubSubRecord0(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subSubRecord0((decoder));
+    }
+
+    private void populate_subSubRecord0(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
new file mode 100644
index 000000000..3cb35e221
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord10;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord10 = readerSchema.getField("subRecord1").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord10);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubRecord20(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubRecord20(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subRecord20((decoder));
+    }
+
+    private void populate_subRecord20(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder), (customization)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
new file mode 100644
index 000000000..c845cbe57
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
new file mode 100644
index 000000000..0ca4c7227
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
new file mode 100644
index 000000000..3b903bc43
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException("Found \"long\", expecting [\"null\", \"string\"]");
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
new file mode 100644
index 000000000..e91081739
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
new file mode 100644
index 000000000..a468548dc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
new file mode 100644
index 000000000..ae8e42f3b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
new file mode 100644
index 000000000..b7f7ddf1f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
new file mode 100644
index 000000000..fb54625de
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
new file mode 100644
index 000000000..edba80afa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
new file mode 100644
index 000000000..e7fd887d0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
new file mode 100644
index 000000000..5328b4970
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
new file mode 100644
index 000000000..7000155c8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
new file mode 100644
index 000000000..4a22aa2ad
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
new file mode 100644
index 000000000..80bf2145c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
new file mode 100644
index 000000000..d4c8cd4a5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
new file mode 100644
index 000000000..cd9f371d8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
new file mode 100644
index 000000000..d8985d05f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
new file mode 100644
index 000000000..ca483552f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
new file mode 100644
index 000000000..166e451fa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
new file mode 100644
index 000000000..5b013d8c2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
new file mode 100644
index 000000000..094924e13
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(2);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
new file mode 100644
index 000000000..fab6625e0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
new file mode 100644
index 000000000..abe441877
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(2);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
new file mode 100644
index 000000000..1201b01ab
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java
new file mode 100644
index 000000000..5d633c658
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java
@@ -0,0 +1,108 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema timeMillisField0;
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema dateField0;
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema arrayOfUnionOfDateAndTimestampMillis0;
+    private final Schema arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0;
+    private final Schema arrayOfUnionOfDateAndTimestampMillisElemOptionSchema0;
+    private final Schema arrayOfUnionOfDateAndTimestampMillisElemOptionSchema1;
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+
+    public FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.timeMillisField0 = readerSchema.getField("timeMillisField").schema();
+        this.dateField0 = readerSchema.getField("dateField").schema();
+        this.arrayOfUnionOfDateAndTimestampMillis0 = readerSchema.getField("arrayOfUnionOfDateAndTimestampMillis").schema();
+        this.arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 = arrayOfUnionOfDateAndTimestampMillis0 .getElementType();
+        this.arrayOfUnionOfDateAndTimestampMillisElemOptionSchema0 = arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 .getTypes().get(0);
+        this.arrayOfUnionOfDateAndTimestampMillisElemOptionSchema1 = arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesDefined0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesDefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastSerdeLogicalTypesDefined;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastSerdeLogicalTypesDefined = ((IndexedRecord)(reuse));
+        } else {
+            FastSerdeLogicalTypesDefined = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+        FastSerdeLogicalTypesDefined.put(0, convertedValue0);
+        populate_FastSerdeLogicalTypesDefined0((FastSerdeLogicalTypesDefined), (customization), (decoder));
+        return FastSerdeLogicalTypesDefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesDefined0(IndexedRecord FastSerdeLogicalTypesDefined, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+        FastSerdeLogicalTypesDefined.put(1, convertedValue1);
+        List<Object> arrayOfUnionOfDateAndTimestampMillis1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastSerdeLogicalTypesDefined.get(2);
+        if (oldArray0 instanceof List) {
+            arrayOfUnionOfDateAndTimestampMillis1 = ((List) oldArray0);
+            if (arrayOfUnionOfDateAndTimestampMillis1 instanceof GenericArray) {
+                ((GenericArray) arrayOfUnionOfDateAndTimestampMillis1).reset();
+            } else {
+                arrayOfUnionOfDateAndTimestampMillis1 .clear();
+            }
+        } else {
+            arrayOfUnionOfDateAndTimestampMillis1 = new org.apache.avro.generic.GenericData.Array<Object>(((int) chunkLen0), arrayOfUnionOfDateAndTimestampMillis0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    LocalDate convertedValue2 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                    arrayOfUnionOfDateAndTimestampMillis1 .add(convertedValue2);
+                } else {
+                    if (unionIndex0 == 1) {
+                        Instant convertedValue3 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                        arrayOfUnionOfDateAndTimestampMillis1 .add(convertedValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayOfUnionOfDateAndTimestampMillisElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesDefined.put(2, arrayOfUnionOfDateAndTimestampMillis1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java
new file mode 100644
index 000000000..038956950
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java
@@ -0,0 +1,96 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+
+public class FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+
+    public FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesDefined0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined deserializeFastSerdeLogicalTypesDefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined FastSerdeLogicalTypesDefined;
+        if ((reuse)!= null) {
+            FastSerdeLogicalTypesDefined = ((com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined)(reuse));
+        } else {
+            FastSerdeLogicalTypesDefined = new com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined();
+        }
+        LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+        FastSerdeLogicalTypesDefined.put(0, convertedValue0);
+        populate_FastSerdeLogicalTypesDefined0((FastSerdeLogicalTypesDefined), (customization), (decoder));
+        return FastSerdeLogicalTypesDefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesDefined0(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined FastSerdeLogicalTypesDefined, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+        FastSerdeLogicalTypesDefined.put(1, convertedValue1);
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastSerdeLogicalTypesDefined.get(2);
+        if (oldArray0 instanceof List) {
+            arrayOfUnionOfDateAndTimestampMillis0 = ((List) oldArray0);
+            if (arrayOfUnionOfDateAndTimestampMillis0 instanceof GenericArray) {
+                ((GenericArray) arrayOfUnionOfDateAndTimestampMillis0).reset();
+            } else {
+                arrayOfUnionOfDateAndTimestampMillis0 .clear();
+            }
+        } else {
+            arrayOfUnionOfDateAndTimestampMillis0 = new ArrayList<Object>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    LocalDate convertedValue2 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                    arrayOfUnionOfDateAndTimestampMillis0 .add(convertedValue2);
+                } else {
+                    if (unionIndex0 == 1) {
+                        Instant convertedValue3 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                        arrayOfUnionOfDateAndTimestampMillis0 .add(convertedValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayOfUnionOfDateAndTimestampMillisElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesDefined.put(2, arrayOfUnionOfDateAndTimestampMillis0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java
new file mode 100644
index 000000000..7d5056de7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java
@@ -0,0 +1,452 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.LocalTimestampMillisConversion conversion_local_timestamp_millis = new org.apache.avro.data.TimeConversions.LocalTimestampMillisConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema unionOfArrayAndMap0;
+    private final Schema unionOfArrayAndMapOptionSchema0;
+    private final Schema unionOfArrayAndMapOptionArrayElemSchema0;
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema unionOfArrayAndMapOptionSchema1;
+    private final Schema unionOfArrayAndMapOptionMapValueSchema0;
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema mapOfUnionsOfDateAndTimestampMillis0;
+    private final Schema mapOfUnionsOfDateAndTimestampMillisMapValueSchema0;
+    private final Schema mapOfUnionsOfDateAndTimestampMillisValueOptionSchema0;
+    private final Schema mapOfUnionsOfDateAndTimestampMillisValueOptionSchema1;
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+    private final Schema timestampMillisMap0;
+    private final Schema timestampMillisMapMapValueSchema0;
+    private final Schema nullableArrayOfDates0;
+    private final Schema nullableArrayOfDatesOptionSchema0;
+    private final Schema nullableArrayOfDatesOptionArrayElemSchema0;
+    private final Schema arrayOfDatesArrayElemSchema0;
+    private final Schema unionOfDecimalOrDate0;
+    private final Schema unionOfDecimalOrDateOptionSchema0;
+    private final Schema logicalTypeSchema_120893213 = Schema.parse("{\"type\":\"bytes\",\"logicalType\":\"decimal\",\"precision\":4,\"scale\":2}");
+    private final Schema unionOfDecimalOrDateOptionSchema1;
+    private final Schema timestampMillisField0;
+    private final Schema timestampMicrosField0;
+    private final Schema logicalTypeSchema__1252781617 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-micros\"}");
+    private final Schema timeMillisField0;
+    private final Schema timeMicrosField0;
+    private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
+    private final Schema dateField0;
+    private final Schema nestedLocalTimestampMillis0;
+    private final Schema nestedTimestamp0;
+    private final Schema logicalTypeSchema__250645780 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"local-timestamp-millis\"}");
+    private final Schema nullableNestedTimestamp0;
+    private final Schema nullableNestedTimestampOptionSchema0;
+    private final Schema nullableUnionOfDateAndLocalTimestamp0;
+    private final Schema nullableUnionOfDateAndLocalTimestampOptionSchema0;
+    private final Schema nullableUnionOfDateAndLocalTimestampOptionSchema1;
+    private final Schema unionOfDateAndLocalTimestamp0;
+    private final Schema unionOfDateAndLocalTimestampOptionSchema0;
+    private final Schema unionOfDateAndLocalTimestampOptionSchema1;
+
+    public FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOfArrayAndMap0 = readerSchema.getField("unionOfArrayAndMap").schema();
+        this.unionOfArrayAndMapOptionSchema0 = unionOfArrayAndMap0 .getTypes().get(0);
+        this.unionOfArrayAndMapOptionArrayElemSchema0 = unionOfArrayAndMapOptionSchema0 .getElementType();
+        this.unionOfArrayAndMapOptionSchema1 = unionOfArrayAndMap0 .getTypes().get(1);
+        this.unionOfArrayAndMapOptionMapValueSchema0 = unionOfArrayAndMapOptionSchema1 .getValueType();
+        this.mapOfUnionsOfDateAndTimestampMillis0 = readerSchema.getField("mapOfUnionsOfDateAndTimestampMillis").schema();
+        this.mapOfUnionsOfDateAndTimestampMillisMapValueSchema0 = mapOfUnionsOfDateAndTimestampMillis0 .getValueType();
+        this.mapOfUnionsOfDateAndTimestampMillisValueOptionSchema0 = mapOfUnionsOfDateAndTimestampMillisMapValueSchema0 .getTypes().get(0);
+        this.mapOfUnionsOfDateAndTimestampMillisValueOptionSchema1 = mapOfUnionsOfDateAndTimestampMillisMapValueSchema0 .getTypes().get(1);
+        this.timestampMillisMap0 = readerSchema.getField("timestampMillisMap").schema();
+        this.timestampMillisMapMapValueSchema0 = timestampMillisMap0 .getValueType();
+        this.nullableArrayOfDates0 = readerSchema.getField("nullableArrayOfDates").schema();
+        this.nullableArrayOfDatesOptionSchema0 = nullableArrayOfDates0 .getTypes().get(1);
+        this.nullableArrayOfDatesOptionArrayElemSchema0 = nullableArrayOfDatesOptionSchema0 .getElementType();
+        this.arrayOfDatesArrayElemSchema0 = nullableArrayOfDatesOptionSchema0 .getElementType();
+        this.unionOfDecimalOrDate0 = readerSchema.getField("unionOfDecimalOrDate").schema();
+        this.unionOfDecimalOrDateOptionSchema0 = unionOfDecimalOrDate0 .getTypes().get(0);
+        this.unionOfDecimalOrDateOptionSchema1 = unionOfDecimalOrDate0 .getTypes().get(1);
+        this.timestampMillisField0 = readerSchema.getField("timestampMillisField").schema();
+        this.timestampMicrosField0 = readerSchema.getField("timestampMicrosField").schema();
+        this.timeMillisField0 = readerSchema.getField("timeMillisField").schema();
+        this.timeMicrosField0 = readerSchema.getField("timeMicrosField").schema();
+        this.dateField0 = readerSchema.getField("dateField").schema();
+        this.nestedLocalTimestampMillis0 = readerSchema.getField("nestedLocalTimestampMillis").schema();
+        this.nestedTimestamp0 = nestedLocalTimestampMillis0 .getField("nestedTimestamp").schema();
+        this.nullableNestedTimestamp0 = nestedLocalTimestampMillis0 .getField("nullableNestedTimestamp").schema();
+        this.nullableNestedTimestampOptionSchema0 = nullableNestedTimestamp0 .getTypes().get(1);
+        this.nullableUnionOfDateAndLocalTimestamp0 = nestedLocalTimestampMillis0 .getField("nullableUnionOfDateAndLocalTimestamp").schema();
+        this.nullableUnionOfDateAndLocalTimestampOptionSchema0 = nullableUnionOfDateAndLocalTimestamp0 .getTypes().get(1);
+        this.nullableUnionOfDateAndLocalTimestampOptionSchema1 = nullableUnionOfDateAndLocalTimestamp0 .getTypes().get(2);
+        this.unionOfDateAndLocalTimestamp0 = nestedLocalTimestampMillis0 .getField("unionOfDateAndLocalTimestamp").schema();
+        this.unionOfDateAndLocalTimestampOptionSchema0 = unionOfDateAndLocalTimestamp0 .getTypes().get(0);
+        this.unionOfDateAndLocalTimestampOptionSchema1 = unionOfDateAndLocalTimestamp0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesTest10((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastSerdeLogicalTypesTest1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastSerdeLogicalTypesTest1 = ((IndexedRecord)(reuse));
+        } else {
+            FastSerdeLogicalTypesTest1 = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            List<LocalTime> unionOfArrayAndMapOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastSerdeLogicalTypesTest1 .get(0);
+            if (oldArray0 instanceof List) {
+                unionOfArrayAndMapOption0 = ((List) oldArray0);
+                unionOfArrayAndMapOption0 .clear();
+            } else {
+                unionOfArrayAndMapOption0 = new org.apache.avro.generic.GenericData.Array<LocalTime>(((int) chunkLen0), unionOfArrayAndMapOptionSchema0);
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+                    unionOfArrayAndMapOption0 .add(convertedValue0);
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, LocalDate> unionOfArrayAndMapOption1 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, LocalDate> unionOfArrayAndMapOptionReuse0 = null;
+                        Object oldMap0 = FastSerdeLogicalTypesTest1 .get(0);
+                        if (oldMap0 instanceof Map) {
+                            unionOfArrayAndMapOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (unionOfArrayAndMapOptionReuse0 != (null)) {
+                            unionOfArrayAndMapOptionReuse0 .clear();
+                            unionOfArrayAndMapOption1 = unionOfArrayAndMapOptionReuse0;
+                        } else {
+                            unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                            unionOfArrayAndMapOption1 .put(key0, convertedValue1);
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), 0));
+                    } else {
+                        unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(0);
+                    }
+                }
+                FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfArrayAndMap': "+ unionIndex0));
+            }
+        }
+        populate_FastSerdeLogicalTypesTest10((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest11((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest12((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest13((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest14((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest15((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        return FastSerdeLogicalTypesTest1;
+    }
+
+    private void populate_FastSerdeLogicalTypesTest10(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillis1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillisReuse0 = null;
+                Object oldMap1 = FastSerdeLogicalTypesTest1 .get(1);
+                if (oldMap1 instanceof Map) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 = ((Map) oldMap1);
+                }
+                if (mapOfUnionsOfDateAndTimestampMillisReuse0 != (null)) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 .clear();
+                    mapOfUnionsOfDateAndTimestampMillis1 = mapOfUnionsOfDateAndTimestampMillisReuse0;
+                } else {
+                    mapOfUnionsOfDateAndTimestampMillis1 = new HashMap<Utf8, Object>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex1 = (decoder.readIndex());
+                    if (unionIndex1 == 0) {
+                        LocalDate convertedValue2 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                        mapOfUnionsOfDateAndTimestampMillis1 .put(key1, convertedValue2);
+                    } else {
+                        if (unionIndex1 == 1) {
+                            Instant convertedValue3 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                            mapOfUnionsOfDateAndTimestampMillis1 .put(key1, convertedValue3);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapOfUnionsOfDateAndTimestampMillisValue': "+ unionIndex1));
+                        }
+                    }
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), 0));
+            } else {
+                mapOfUnionsOfDateAndTimestampMillis1 = new HashMap<Utf8, Object>(0);
+            }
+        }
+        FastSerdeLogicalTypesTest1 .put(1, mapOfUnionsOfDateAndTimestampMillis1);
+        Map<Utf8, Instant> timestampMillisMap1 = null;
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), ((int) chunkLen3)));
+            } else {
+                Map<Utf8, Instant> timestampMillisMapReuse0 = null;
+                Object oldMap2 = FastSerdeLogicalTypesTest1 .get(2);
+                if (oldMap2 instanceof Map) {
+                    timestampMillisMapReuse0 = ((Map) oldMap2);
+                }
+                if (timestampMillisMapReuse0 != (null)) {
+                    timestampMillisMapReuse0 .clear();
+                    timestampMillisMap1 = timestampMillisMapReuse0;
+                } else {
+                    timestampMillisMap1 = new HashMap<Utf8, Instant>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    Instant convertedValue4 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                    timestampMillisMap1 .put(key2, convertedValue4);
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), 0));
+            } else {
+                timestampMillisMap1 = new HashMap<Utf8, Instant>(0);
+            }
+        }
+        FastSerdeLogicalTypesTest1 .put(2, timestampMillisMap1);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest11(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastSerdeLogicalTypesTest1 .put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                List<LocalDate> nullableArrayOfDatesOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastSerdeLogicalTypesTest1 .get(3);
+                if (oldArray1 instanceof List) {
+                    nullableArrayOfDatesOption0 = ((List) oldArray1);
+                    nullableArrayOfDatesOption0 .clear();
+                } else {
+                    nullableArrayOfDatesOption0 = new org.apache.avro.generic.GenericData.Array<LocalDate>(((int) chunkLen4), nullableArrayOfDatesOptionSchema0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        LocalDate convertedValue5 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                        nullableArrayOfDatesOption0 .add(convertedValue5);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastSerdeLogicalTypesTest1 .put(3, nullableArrayOfDatesOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'nullableArrayOfDates': "+ unionIndex2));
+            }
+        }
+        List<LocalDate> arrayOfDates0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray2 = FastSerdeLogicalTypesTest1 .get(4);
+        if (oldArray2 instanceof List) {
+            arrayOfDates0 = ((List) oldArray2);
+            arrayOfDates0 .clear();
+        } else {
+            arrayOfDates0 = new org.apache.avro.generic.GenericData.Array<LocalDate>(((int) chunkLen5), nullableArrayOfDatesOptionSchema0);
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                LocalDate convertedValue6 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                arrayOfDates0 .add(convertedValue6);
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesTest1 .put(4, arrayOfDates0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest12(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            ByteBuffer byteBuffer0;
+            Object oldBytes0 = FastSerdeLogicalTypesTest1 .get(5);
+            if (oldBytes0 instanceof ByteBuffer) {
+                byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+            } else {
+                byteBuffer0 = (decoder).readBytes((null));
+            }
+            BigDecimal convertedValue7 = ((BigDecimal) Conversions.convertToLogicalType(byteBuffer0, this.logicalTypeSchema_120893213, this.logicalTypeSchema_120893213 .getLogicalType(), this.conversion_decimal));
+            FastSerdeLogicalTypesTest1 .put(5, convertedValue7);
+        } else {
+            if (unionIndex3 == 1) {
+                LocalDate convertedValue8 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                FastSerdeLogicalTypesTest1 .put(5, convertedValue8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfDecimalOrDate': "+ unionIndex3));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastSerdeLogicalTypesTest1 .get(6);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastSerdeLogicalTypesTest1 .put(6, charSequence0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest13(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Instant convertedValue9 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+        FastSerdeLogicalTypesTest1 .put(7, convertedValue9);
+        Instant convertedValue10 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__1252781617, this.logicalTypeSchema__1252781617 .getLogicalType(), this.conversion_timestamp_micros));
+        FastSerdeLogicalTypesTest1 .put(8, convertedValue10);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest14(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalTime convertedValue11 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+        FastSerdeLogicalTypesTest1 .put(9, convertedValue11);
+        LocalTime convertedValue12 = ((LocalTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__1515894331, this.logicalTypeSchema__1515894331 .getLogicalType(), this.conversion_time_micros));
+        FastSerdeLogicalTypesTest1 .put(10, convertedValue12);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest15(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalDate convertedValue13 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+        FastSerdeLogicalTypesTest1 .put(11, convertedValue13);
+        FastSerdeLogicalTypesTest1 .put(12, deserializeLocalTimestampRecord0(FastSerdeLogicalTypesTest1 .get(12), (decoder), (customization)));
+    }
+
+    public IndexedRecord deserializeLocalTimestampRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord LocalTimestampRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == nestedLocalTimestampMillis0)) {
+            LocalTimestampRecord = ((IndexedRecord)(reuse));
+        } else {
+            LocalTimestampRecord = new org.apache.avro.generic.GenericData.Record(nestedLocalTimestampMillis0);
+        }
+        LocalDateTime convertedValue14 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
+        LocalTimestampRecord.put(0, convertedValue14);
+        populate_LocalTimestampRecord0((LocalTimestampRecord), (customization), (decoder));
+        populate_LocalTimestampRecord1((LocalTimestampRecord), (customization), (decoder));
+        return LocalTimestampRecord;
+    }
+
+    private void populate_LocalTimestampRecord0(IndexedRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            LocalTimestampRecord.put(1, null);
+        } else {
+            if (unionIndex4 == 1) {
+                LocalDateTime convertedValue15 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
+                LocalTimestampRecord.put(1, convertedValue15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'nullableNestedTimestamp': "+ unionIndex4));
+            }
+        }
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            LocalTimestampRecord.put(2, null);
+        } else {
+            if (unionIndex5 == 1) {
+                LocalDate convertedValue16 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                LocalTimestampRecord.put(2, convertedValue16);
+            } else {
+                if (unionIndex5 == 2) {
+                    LocalDateTime convertedValue17 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
+                    LocalTimestampRecord.put(2, convertedValue17);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullableUnionOfDateAndLocalTimestamp': "+ unionIndex5));
+                }
+            }
+        }
+    }
+
+    private void populate_LocalTimestampRecord1(IndexedRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            LocalDate convertedValue18 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+            LocalTimestampRecord.put(3, convertedValue18);
+        } else {
+            if (unionIndex6 == 1) {
+                LocalDateTime convertedValue19 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
+                LocalTimestampRecord.put(3, convertedValue19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfDateAndLocalTimestamp': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java
new file mode 100644
index 000000000..a684487b1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java
@@ -0,0 +1,386 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.LocalTimestampMillisConversion conversion_local_timestamp_millis = new org.apache.avro.data.TimeConversions.LocalTimestampMillisConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+    private final Schema logicalTypeSchema_120893213 = Schema.parse("{\"type\":\"bytes\",\"logicalType\":\"decimal\",\"precision\":4,\"scale\":2}");
+    private final Schema logicalTypeSchema__1252781617 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-micros\"}");
+    private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
+    private final Schema logicalTypeSchema__250645780 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"local-timestamp-millis\"}");
+
+    public FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 deserializeFastSerdeLogicalTypesTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1;
+        if ((reuse)!= null) {
+            FastSerdeLogicalTypesTest1 = ((com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1)(reuse));
+        } else {
+            FastSerdeLogicalTypesTest1 = new com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            List<LocalTime> unionOfArrayAndMapOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastSerdeLogicalTypesTest1 .get(0);
+            if (oldArray0 instanceof List) {
+                unionOfArrayAndMapOption0 = ((List) oldArray0);
+                unionOfArrayAndMapOption0 .clear();
+            } else {
+                unionOfArrayAndMapOption0 = new ArrayList<LocalTime>(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+                    unionOfArrayAndMapOption0 .add(convertedValue0);
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, LocalDate> unionOfArrayAndMapOption1 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, LocalDate> unionOfArrayAndMapOptionReuse0 = null;
+                        Object oldMap0 = FastSerdeLogicalTypesTest1 .get(0);
+                        if (oldMap0 instanceof Map) {
+                            unionOfArrayAndMapOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (unionOfArrayAndMapOptionReuse0 != (null)) {
+                            unionOfArrayAndMapOptionReuse0 .clear();
+                            unionOfArrayAndMapOption1 = unionOfArrayAndMapOptionReuse0;
+                        } else {
+                            unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                            unionOfArrayAndMapOption1 .put(key0, convertedValue1);
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), 0));
+                    } else {
+                        unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(0);
+                    }
+                }
+                FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfArrayAndMap': "+ unionIndex0));
+            }
+        }
+        populate_FastSerdeLogicalTypesTest10((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest11((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest12((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest13((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest14((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest15((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        return FastSerdeLogicalTypesTest1;
+    }
+
+    private void populate_FastSerdeLogicalTypesTest10(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillis0 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillisReuse0 = null;
+                Object oldMap1 = FastSerdeLogicalTypesTest1 .get(1);
+                if (oldMap1 instanceof Map) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 = ((Map) oldMap1);
+                }
+                if (mapOfUnionsOfDateAndTimestampMillisReuse0 != (null)) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 .clear();
+                    mapOfUnionsOfDateAndTimestampMillis0 = mapOfUnionsOfDateAndTimestampMillisReuse0;
+                } else {
+                    mapOfUnionsOfDateAndTimestampMillis0 = new HashMap<Utf8, Object>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex1 = (decoder.readIndex());
+                    if (unionIndex1 == 0) {
+                        LocalDate convertedValue2 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                        mapOfUnionsOfDateAndTimestampMillis0 .put(key1, convertedValue2);
+                    } else {
+                        if (unionIndex1 == 1) {
+                            Instant convertedValue3 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                            mapOfUnionsOfDateAndTimestampMillis0 .put(key1, convertedValue3);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapOfUnionsOfDateAndTimestampMillisValue': "+ unionIndex1));
+                        }
+                    }
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), 0));
+            } else {
+                mapOfUnionsOfDateAndTimestampMillis0 = new HashMap<Utf8, Object>(0);
+            }
+        }
+        FastSerdeLogicalTypesTest1 .put(1, mapOfUnionsOfDateAndTimestampMillis0);
+        Map<Utf8, Instant> timestampMillisMap0 = null;
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), ((int) chunkLen3)));
+            } else {
+                Map<Utf8, Instant> timestampMillisMapReuse0 = null;
+                Object oldMap2 = FastSerdeLogicalTypesTest1 .get(2);
+                if (oldMap2 instanceof Map) {
+                    timestampMillisMapReuse0 = ((Map) oldMap2);
+                }
+                if (timestampMillisMapReuse0 != (null)) {
+                    timestampMillisMapReuse0 .clear();
+                    timestampMillisMap0 = timestampMillisMapReuse0;
+                } else {
+                    timestampMillisMap0 = new HashMap<Utf8, Instant>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    Instant convertedValue4 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                    timestampMillisMap0 .put(key2, convertedValue4);
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), 0));
+            } else {
+                timestampMillisMap0 = new HashMap<Utf8, Instant>(0);
+            }
+        }
+        FastSerdeLogicalTypesTest1 .put(2, timestampMillisMap0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest11(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastSerdeLogicalTypesTest1 .put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                List<LocalDate> nullableArrayOfDatesOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastSerdeLogicalTypesTest1 .get(3);
+                if (oldArray1 instanceof List) {
+                    nullableArrayOfDatesOption0 = ((List) oldArray1);
+                    nullableArrayOfDatesOption0 .clear();
+                } else {
+                    nullableArrayOfDatesOption0 = new ArrayList<LocalDate>(((int) chunkLen4));
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        LocalDate convertedValue5 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                        nullableArrayOfDatesOption0 .add(convertedValue5);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastSerdeLogicalTypesTest1 .put(3, nullableArrayOfDatesOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'nullableArrayOfDates': "+ unionIndex2));
+            }
+        }
+        List<LocalDate> arrayOfDates0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray2 = FastSerdeLogicalTypesTest1 .get(4);
+        if (oldArray2 instanceof List) {
+            arrayOfDates0 = ((List) oldArray2);
+            arrayOfDates0 .clear();
+        } else {
+            arrayOfDates0 = new ArrayList<LocalDate>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                LocalDate convertedValue6 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                arrayOfDates0 .add(convertedValue6);
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesTest1 .put(4, arrayOfDates0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest12(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            ByteBuffer byteBuffer0;
+            Object oldBytes0 = FastSerdeLogicalTypesTest1 .get(5);
+            if (oldBytes0 instanceof ByteBuffer) {
+                byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+            } else {
+                byteBuffer0 = (decoder).readBytes((null));
+            }
+            BigDecimal convertedValue7 = ((BigDecimal) Conversions.convertToLogicalType(byteBuffer0, this.logicalTypeSchema_120893213, this.logicalTypeSchema_120893213 .getLogicalType(), this.conversion_decimal));
+            FastSerdeLogicalTypesTest1 .put(5, convertedValue7);
+        } else {
+            if (unionIndex3 == 1) {
+                LocalDate convertedValue8 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                FastSerdeLogicalTypesTest1 .put(5, convertedValue8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfDecimalOrDate': "+ unionIndex3));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastSerdeLogicalTypesTest1 .get(6);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastSerdeLogicalTypesTest1 .put(6, charSequence0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest13(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Instant convertedValue9 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+        FastSerdeLogicalTypesTest1 .put(7, convertedValue9);
+        Instant convertedValue10 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__1252781617, this.logicalTypeSchema__1252781617 .getLogicalType(), this.conversion_timestamp_micros));
+        FastSerdeLogicalTypesTest1 .put(8, convertedValue10);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest14(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalTime convertedValue11 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+        FastSerdeLogicalTypesTest1 .put(9, convertedValue11);
+        LocalTime convertedValue12 = ((LocalTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__1515894331, this.logicalTypeSchema__1515894331 .getLogicalType(), this.conversion_time_micros));
+        FastSerdeLogicalTypesTest1 .put(10, convertedValue12);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest15(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalDate convertedValue13 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+        FastSerdeLogicalTypesTest1 .put(11, convertedValue13);
+        FastSerdeLogicalTypesTest1 .put(12, deserializeLocalTimestampRecord0(FastSerdeLogicalTypesTest1 .get(12), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord deserializeLocalTimestampRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord;
+        if ((reuse)!= null) {
+            LocalTimestampRecord = ((com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord)(reuse));
+        } else {
+            LocalTimestampRecord = new com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord();
+        }
+        LocalDateTime convertedValue14 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
+        LocalTimestampRecord.put(0, convertedValue14);
+        populate_LocalTimestampRecord0((LocalTimestampRecord), (customization), (decoder));
+        populate_LocalTimestampRecord1((LocalTimestampRecord), (customization), (decoder));
+        return LocalTimestampRecord;
+    }
+
+    private void populate_LocalTimestampRecord0(com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            LocalTimestampRecord.put(1, null);
+        } else {
+            if (unionIndex4 == 1) {
+                LocalDateTime convertedValue15 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
+                LocalTimestampRecord.put(1, convertedValue15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'nullableNestedTimestamp': "+ unionIndex4));
+            }
+        }
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            LocalTimestampRecord.put(2, null);
+        } else {
+            if (unionIndex5 == 1) {
+                LocalDate convertedValue16 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                LocalTimestampRecord.put(2, convertedValue16);
+            } else {
+                if (unionIndex5 == 2) {
+                    LocalDateTime convertedValue17 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
+                    LocalTimestampRecord.put(2, convertedValue17);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullableUnionOfDateAndLocalTimestamp': "+ unionIndex5));
+                }
+            }
+        }
+    }
+
+    private void populate_LocalTimestampRecord1(com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            LocalDate convertedValue18 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+            LocalTimestampRecord.put(3, convertedValue18);
+        } else {
+            if (unionIndex6 == 1) {
+                LocalDateTime convertedValue19 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
+                LocalTimestampRecord.put(3, convertedValue19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfDateAndLocalTimestamp': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java
new file mode 100644
index 000000000..58045cf32
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayOfUnionOfDateAndTimestampMillis0;
+    private final Schema arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0;
+
+    public FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayOfUnionOfDateAndTimestampMillis0 = readerSchema.getField("arrayOfUnionOfDateAndTimestampMillis").schema();
+        this.arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 = arrayOfUnionOfDateAndTimestampMillis0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesUndefined0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesUndefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastSerdeLogicalTypesUndefined;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastSerdeLogicalTypesUndefined = ((IndexedRecord)(reuse));
+        } else {
+            FastSerdeLogicalTypesUndefined = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastSerdeLogicalTypesUndefined.put(0, (decoder.readInt()));
+        populate_FastSerdeLogicalTypesUndefined0((FastSerdeLogicalTypesUndefined), (customization), (decoder));
+        return FastSerdeLogicalTypesUndefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesUndefined0(IndexedRecord FastSerdeLogicalTypesUndefined, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastSerdeLogicalTypesUndefined.put(1, (decoder.readInt()));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastSerdeLogicalTypesUndefined.get(2);
+        if (oldArray0 instanceof List) {
+            arrayOfUnionOfDateAndTimestampMillis1 = ((List) oldArray0);
+            if (arrayOfUnionOfDateAndTimestampMillis1 instanceof GenericArray) {
+                ((GenericArray) arrayOfUnionOfDateAndTimestampMillis1).reset();
+            } else {
+                arrayOfUnionOfDateAndTimestampMillis1 .clear();
+            }
+        } else {
+            arrayOfUnionOfDateAndTimestampMillis1 = new org.apache.avro.generic.GenericData.Array<Object>(((int) chunkLen0), arrayOfUnionOfDateAndTimestampMillis0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    arrayOfUnionOfDateAndTimestampMillis1 .add((decoder.readInt()));
+                } else {
+                    if (unionIndex0 == 1) {
+                        arrayOfUnionOfDateAndTimestampMillis1 .add((decoder.readLong()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayOfUnionOfDateAndTimestampMillisElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesUndefined.put(2, arrayOfUnionOfDateAndTimestampMillis1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java
new file mode 100644
index 000000000..b67db3d10
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java
@@ -0,0 +1,82 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+
+public class FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined>
+{
+
+    private final Schema readerSchema;
+
+    public FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesUndefined0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined deserializeFastSerdeLogicalTypesUndefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined FastSerdeLogicalTypesUndefined;
+        if ((reuse)!= null) {
+            FastSerdeLogicalTypesUndefined = ((com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined)(reuse));
+        } else {
+            FastSerdeLogicalTypesUndefined = new com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined();
+        }
+        FastSerdeLogicalTypesUndefined.put(0, (decoder.readInt()));
+        populate_FastSerdeLogicalTypesUndefined0((FastSerdeLogicalTypesUndefined), (customization), (decoder));
+        return FastSerdeLogicalTypesUndefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesUndefined0(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined FastSerdeLogicalTypesUndefined, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastSerdeLogicalTypesUndefined.put(1, (decoder.readInt()));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastSerdeLogicalTypesUndefined.get(2);
+        if (oldArray0 instanceof List) {
+            arrayOfUnionOfDateAndTimestampMillis0 = ((List) oldArray0);
+            if (arrayOfUnionOfDateAndTimestampMillis0 instanceof GenericArray) {
+                ((GenericArray) arrayOfUnionOfDateAndTimestampMillis0).reset();
+            } else {
+                arrayOfUnionOfDateAndTimestampMillis0 .clear();
+            }
+        } else {
+            arrayOfUnionOfDateAndTimestampMillis0 = new ArrayList<Object>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    arrayOfUnionOfDateAndTimestampMillis0 .add((decoder.readInt()));
+                } else {
+                    if (unionIndex0 == 1) {
+                        arrayOfUnionOfDateAndTimestampMillis0 .add((decoder.readLong()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayOfUnionOfDateAndTimestampMillisElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesUndefined.put(2, arrayOfUnionOfDateAndTimestampMillis0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
new file mode 100644
index 000000000..8d41cf81e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
@@ -0,0 +1,152 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            if (testStringArray1 instanceof GenericArray) {
+                ((GenericArray) testStringArray1).reset();
+            } else {
+                testStringArray1 .clear();
+            }
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
new file mode 100644
index 000000000..d4b83595d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
@@ -0,0 +1,134 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            if (testStringArray1 instanceof GenericArray) {
+                ((GenericArray) testStringArray1).reset();
+            } else {
+                testStringArray1 .clear();
+            }
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
new file mode 100644
index 000000000..ab1e5311e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
@@ -0,0 +1,134 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            if (testStringArray1 instanceof GenericArray) {
+                ((GenericArray) testStringArray1).reset();
+            } else {
+                testStringArray1 .clear();
+            }
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
new file mode 100644
index 000000000..9ca18e45a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
@@ -0,0 +1,1115 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
new file mode 100644
index 000000000..1def1404a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericDeserializer_2140000109_2140000109
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema mapValueOptionSchema0;
+    private final Schema field0;
+
+    public Map_of_UNION_GenericDeserializer_2140000109_2140000109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.mapValueOptionSchema0 = mapMapValueSchema0 .getTypes().get(1);
+        this.field0 = mapValueOptionSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapValueOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_UNION_SpecificDeserializer_971650236_971650236.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
new file mode 100644
index 000000000..c67b5e96c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
@@ -0,0 +1,1125 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_SpecificDeserializer_971650236_971650236
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_UNION_SpecificDeserializer_971650236_971650236(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_record_GenericDeserializer_1223705675_568621313.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_record_GenericDeserializer_1223705675_568621313.java
new file mode 100644
index 000000000..f5c3aa452
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_record_GenericDeserializer_1223705675_568621313.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1223705675_568621313
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionMapValueSchema0;
+
+    public Map_of_record_GenericDeserializer_1223705675_568621313(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionMapValueSchema0 = readerSchema.getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
+                        if ((reuse) instanceof Map) {
+                            unionOptionReuse0 = ((Map)(reuse));
+                        }
+                        if (unionOptionReuse0 != (null)) {
+                            unionOptionReuse0 .clear();
+                            unionOption0 = unionOptionReuse0;
+                        } else {
+                            unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            unionOption0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+                    } else {
+                        unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_record_GenericDeserializer_1677529043_1677529043.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_record_GenericDeserializer_1677529043_1677529043.java
new file mode 100644
index 000000000..ae555ad62
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/Map_of_record_GenericDeserializer_1677529043_1677529043.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1677529043_1677529043
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema field0;
+
+    public Map_of_record_GenericDeserializer_1677529043_1677529043(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.field0 = mapMapValueSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
new file mode 100644
index 000000000..33d497716
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField>
+{
+
+    private final Schema readerSchema;
+
+    public RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRecordWithLargeUnionField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField RecordWithLargeUnionField;
+        if ((reuse)!= null) {
+            RecordWithLargeUnionField = ((com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField)(reuse));
+        } else {
+            RecordWithLargeUnionField = new com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Utf8 charSequence0;
+            Object oldString0 = RecordWithLargeUnionField.get(0);
+            if (oldString0 instanceof Utf8) {
+                charSequence0 = (decoder).readString(((Utf8) oldString0));
+            } else {
+                charSequence0 = (decoder).readString(null);
+            }
+            RecordWithLargeUnionField.put(0, charSequence0);
+        } else {
+            if (unionIndex0 == 1) {
+                RecordWithLargeUnionField.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException(new StringBuilder().append("Found").append(" \"byt").append("es\", ").append("expec").append("ting ").append("[\"str").append("ing\",").append(" \"int").append("\"]").toString());
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+                }
+            }
+        }
+        return RecordWithLargeUnionField;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
new file mode 100644
index 000000000..619a02804
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        return RemovedTypesTestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
new file mode 100644
index 000000000..0452693fa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
@@ -0,0 +1,406 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord3((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord4((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord5((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord6((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord7((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord8((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord9((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord10((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord11((RemovedTypesTestRecord), (customization), (decoder));
+        return RemovedTypesTestRecord;
+    }
+
+    private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipBytes();
+        long chunkLen0 = (decoder.readArrayStart());
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object removedBytesArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipBytes();
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.skipBytes();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedBytesUnion': "+ unionIndex0));
+            }
+        }
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    decoder.skipBytes();
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen2 = (decoder.readArrayStart());
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object removedBytesUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex1 == 1) {
+                        decoder.skipBytes();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedBytesUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex2 = (decoder.readIndex());
+                    if (unionIndex2 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex2 == 1) {
+                            decoder.skipBytes();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedBytesUnionMapValue': "+ unionIndex2));
+                        }
+                    }
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipFixed(1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex3 == 1) {
+                decoder.skipFixed(1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedFixedUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen4 = (decoder.readArrayStart());
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object removedFixedArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipFixed(1);
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    decoder.skipFixed(1);
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen6 = (decoder.readArrayStart());
+        while (chunkLen6 > 0) {
+            for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                Object removedFixedUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex4 = (decoder.readIndex());
+                if (unionIndex4 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex4 == 1) {
+                        decoder.skipFixed(1);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedFixedUnionArrayElem': "+ unionIndex4));
+                    }
+                }
+            }
+            chunkLen6 = (decoder.arrayNext());
+        }
+        long chunkLen7 = (decoder.readMapStart());
+        if (chunkLen7 > 0) {
+            do {
+                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    int unionIndex5 = (decoder.readIndex());
+                    if (unionIndex5 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex5 == 1) {
+                            decoder.skipFixed(1);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedFixedUnionMapValue': "+ unionIndex5));
+                        }
+                    }
+                }
+                chunkLen7 = (decoder.mapNext());
+            } while (chunkLen7 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.readEnum();
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.readEnum();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedEnumUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen8 = (decoder.readArrayStart());
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                decoder.readEnum();
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        long chunkLen9 = (decoder.readMapStart());
+        if (chunkLen9 > 0) {
+            do {
+                for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    decoder.readEnum();
+                }
+                chunkLen9 = (decoder.mapNext());
+            } while (chunkLen9 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen10 = (decoder.readArrayStart());
+        while (chunkLen10 > 0) {
+            for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                Object removedEnumUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex7 = (decoder.readIndex());
+                if (unionIndex7 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex7 == 1) {
+                        decoder.readEnum();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedEnumUnionArrayElem': "+ unionIndex7));
+                    }
+                }
+            }
+            chunkLen10 = (decoder.arrayNext());
+        }
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key5 = (decoder.readString(null));
+                    int unionIndex8 = (decoder.readIndex());
+                    if (unionIndex8 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex8 == 1) {
+                            decoder.readEnum();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedEnumUnionMapValue': "+ unionIndex8));
+                        }
+                    }
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializeRemovedSubRecord0(null, (decoder), (customization));
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex9 == 1) {
+                deserializeRemovedSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedSubRecordUnion': "+ unionIndex9));
+            }
+        }
+    }
+
+    public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen12 = (decoder.readArrayStart());
+        while (chunkLen12 > 0) {
+            for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                Object removedSubRecordArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder), (customization));
+            }
+            chunkLen12 = (decoder.arrayNext());
+        }
+        long chunkLen13 = (decoder.readArrayStart());
+        while (chunkLen13 > 0) {
+            for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                Object removedSubRecordUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex10 == 1) {
+                        deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder), (customization));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen13 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen14 = (decoder.readMapStart());
+        if (chunkLen14 > 0) {
+            do {
+                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                    Utf8 key6 = (decoder.readString(null));
+                    deserializeRemovedSubRecord0(null, (decoder), (customization));
+                }
+                chunkLen14 = (decoder.mapNext());
+            } while (chunkLen14 > 0);
+        }
+        long chunkLen15 = (decoder.readMapStart());
+        if (chunkLen15 > 0) {
+            do {
+                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                    Utf8 key7 = (decoder.readString(null));
+                    int unionIndex11 = (decoder.readIndex());
+                    if (unionIndex11 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex11 == 1) {
+                            deserializeRemovedSubRecord0(null, (decoder), (customization));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionMapValue': "+ unionIndex11));
+                        }
+                    }
+                }
+                chunkLen15 = (decoder.mapNext());
+            } while (chunkLen15 > 0);
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
new file mode 100644
index 000000000..c05ed3ba7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
@@ -0,0 +1,176 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest1_SpecificDeserializer_1718878379_595582209
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest1_SpecificDeserializer_1718878379_595582209(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSplitRecordTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1;
+        if ((reuse)!= null) {
+            SplitRecordTest1 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1)(reuse));
+        } else {
+            SplitRecordTest1 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1();
+        }
+        SplitRecordTest1 .put(0, deserializeFullRecord0(SplitRecordTest1 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest10((SplitRecordTest1), (customization), (decoder));
+        return SplitRecordTest1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FullRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        FullRecord.put(1, null);
+        return FullRecord;
+    }
+
+    private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest1 .put(1, deserializeFullRecord1(SplitRecordTest1 .get(1), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest1 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            if (record30 instanceof GenericArray) {
+                ((GenericArray) record30).reset();
+            } else {
+                record30 .clear();
+            }
+        } else {
+            record30 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord2(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest1 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+        FullRecord.put(0, null);
+        return FullRecord;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord2(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FullRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_FullRecord0((FullRecord), (customization), (decoder));
+        return FullRecord;
+    }
+
+    private void populate_FullRecord0(com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
new file mode 100644
index 000000000..954818ad6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
@@ -0,0 +1,208 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FullRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringRecord;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest2_SpecificDeserializer_595582209_1718878379
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest2_SpecificDeserializer_595582209_1718878379(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest20((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSplitRecordTest20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2;
+        if ((reuse)!= null) {
+            SplitRecordTest2 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2)(reuse));
+        } else {
+            SplitRecordTest2 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2();
+        }
+        SplitRecordTest2 .put(0, deserializeStringRecord0(SplitRecordTest2 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest20((SplitRecordTest2), (customization), (decoder));
+        return SplitRecordTest2;
+    }
+
+    public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        StringRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((StringRecord)(reuse));
+        } else {
+            IntRecord = new StringRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = IntRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        populate_IntRecord0((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord0(StringRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest2 .put(1, deserializeIntRecord0(SplitRecordTest2 .get(1), (decoder), (customization)));
+        List<FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest2 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            if (record30 instanceof GenericArray) {
+                ((GenericArray) record30).reset();
+            } else {
+                record30 .clear();
+            }
+        } else {
+            record30 = new ArrayList<FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord0(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest2 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((com.linkedin.avro.fastserde.generated.avro.IntRecord)(reuse));
+        } else {
+            IntRecord = new com.linkedin.avro.fastserde.generated.avro.IntRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex2 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_IntRecord1((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex3 == 1) {
+                IntRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+    public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        FullRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((FullRecord)(reuse));
+        } else {
+            IntRecord = new FullRecord();
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = IntRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex4));
+            }
+        }
+        populate_IntRecord2((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord2(FullRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            IntRecord.put(1, null);
+        } else {
+            if (unionIndex5 == 1) {
+                IntRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/StringableRecord_SpecificDeserializer_842267318_842267318.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/StringableRecord_SpecificDeserializer_842267318_842267318.java
new file mode 100644
index 000000000..85742e83c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/StringableRecord_SpecificDeserializer_842267318_842267318.java
@@ -0,0 +1,228 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroRuntimeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificDeserializer_842267318_842267318
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.StringableRecord>
+{
+
+    private final Schema readerSchema;
+
+    public StringableRecord_SpecificDeserializer_842267318_842267318(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        try {
+            return deserializeStringableRecord0((reuse), (decoder), (customization));
+        } catch (NumberFormatException e) {
+            throw new AvroRuntimeException(e);
+        } catch (MalformedURLException e) {
+            throw new AvroRuntimeException(e);
+        } catch (URISyntaxException e) {
+            throw new AvroRuntimeException(e);
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord;
+        if ((reuse)!= null) {
+            StringableRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableRecord)(reuse));
+        } else {
+            StringableRecord = new com.linkedin.avro.fastserde.generated.avro.StringableRecord();
+        }
+        BigInteger charSequence0 = new BigInteger((decoder.readString()));
+        StringableRecord.put(0, charSequence0);
+        populate_StringableRecord0((StringableRecord), (customization), (decoder));
+        populate_StringableRecord1((StringableRecord), (customization), (decoder));
+        populate_StringableRecord2((StringableRecord), (customization), (decoder));
+        populate_StringableRecord3((StringableRecord), (customization), (decoder));
+        populate_StringableRecord4((StringableRecord), (customization), (decoder));
+        return StringableRecord;
+    }
+
+    private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, URISyntaxException
+    {
+        BigDecimal charSequence1 = new BigDecimal((decoder.readString()));
+        StringableRecord.put(1, charSequence1);
+        URI charSequence2 = new URI((decoder.readString()));
+        StringableRecord.put(2, charSequence2);
+    }
+
+    private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        URL charSequence3 = new URL((decoder.readString()));
+        StringableRecord.put(3, charSequence3);
+        File charSequence4 = new File((decoder.readString()));
+        StringableRecord.put(4, charSequence4);
+    }
+
+    private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        List<URL> urlArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = StringableRecord.get(5);
+        if (oldArray0 instanceof List) {
+            urlArray0 = ((List) oldArray0);
+            if (urlArray0 instanceof GenericArray) {
+                ((GenericArray) urlArray0).reset();
+            } else {
+                urlArray0 .clear();
+            }
+        } else {
+            urlArray0 = new ArrayList<URL>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object urlArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    urlArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                URL charSequence5 = new URL((decoder.readString()));
+                urlArray0 .add(charSequence5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        StringableRecord.put(5, urlArray0);
+        Map<URL, BigInteger> urlMap0 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), ((int) chunkLen1)));
+            } else {
+                Map<URL, BigInteger> urlMapReuse0 = null;
+                Object oldMap0 = StringableRecord.get(6);
+                if (oldMap0 instanceof Map) {
+                    urlMapReuse0 = ((Map) oldMap0);
+                }
+                if (urlMapReuse0 != (null)) {
+                    urlMapReuse0 .clear();
+                    urlMap0 = urlMapReuse0;
+                } else {
+                    urlMap0 = new HashMap<URL, BigInteger>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    URL key0 = new URL((decoder.readString()));
+                    BigInteger charSequence6 = new BigInteger((decoder.readString()));
+                    urlMap0 .put(key0, charSequence6);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), 0));
+            } else {
+                urlMap0 = new HashMap<URL, BigInteger>(0);
+            }
+        }
+        StringableRecord.put(6, urlMap0);
+    }
+
+    private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        StringableRecord.put(7, deserializeStringableSubRecord0(StringableRecord.get(7), (decoder), (customization)));
+        StringableRecord.put(8, deserializeAnotherSubRecord0(StringableRecord.get(8), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord;
+        if ((reuse)!= null) {
+            StringableSubRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableSubRecord)(reuse));
+        } else {
+            StringableSubRecord = new com.linkedin.avro.fastserde.generated.avro.StringableSubRecord();
+        }
+        URI charSequence7 = new URI((decoder.readString()));
+        StringableSubRecord.put(0, charSequence7);
+        populate_StringableSubRecord0((StringableSubRecord), (customization), (decoder));
+        return StringableSubRecord;
+    }
+
+    private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, URISyntaxException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            StringableSubRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence8;
+                Object oldString0 = StringableSubRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                StringableSubRecord.put(1, charSequence8);
+            } else {
+                if (unionIndex0 == 2) {
+                    StringableSubRecord.put(1, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullStringIntUnion': "+ unionIndex0));
+                }
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord AnotherSubRecord;
+        if ((reuse)!= null) {
+            AnotherSubRecord = ((com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord)(reuse));
+        } else {
+            AnotherSubRecord = new com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord();
+        }
+        AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder), (customization)));
+        return AnotherSubRecord;
+    }
+
+    private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            StringableRecord.put(9, null);
+        } else {
+            if (unionIndex1 == 1) {
+                String charSequence9 = (decoder).readString();
+                StringableRecord.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'stringUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
new file mode 100644
index 000000000..db457b6e2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
@@ -0,0 +1,46 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class TestArrayOfFloats_GenericDeserializer_1408566797_1408566797
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema array_of_float0;
+
+    public TestArrayOfFloats_GenericDeserializer_1408566797_1408566797(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.array_of_float0 = readerSchema.getField("array_of_float").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestArrayOfFloats0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestArrayOfFloats;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestArrayOfFloats = ((IndexedRecord)(reuse));
+        } else {
+            TestArrayOfFloats = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveFloatList array_of_float1 = null;
+        array_of_float1 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestArrayOfFloats.get(0), (decoder)));
+        TestArrayOfFloats.put(0, array_of_float1);
+        return TestArrayOfFloats;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_GenericDeserializer_473555078_473555078.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_GenericDeserializer_473555078_473555078.java
new file mode 100644
index 000000000..b983e49c5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_GenericDeserializer_473555078_473555078.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_GenericDeserializer_473555078_473555078
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema map_field0;
+
+    public TestRecord_GenericDeserializer_473555078_473555078(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.map_field0 = readerSchema.getField("map_field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestRecord = ((IndexedRecord)(reuse));
+        } else {
+            TestRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Utf8> map_field1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Utf8> map_fieldReuse0 = null;
+                Object oldMap0 = TestRecord.get(0);
+                if (oldMap0 instanceof Map) {
+                    map_fieldReuse0 = ((Map) oldMap0);
+                }
+                if (map_fieldReuse0 != (null)) {
+                    map_fieldReuse0 .clear();
+                    map_field1 = map_fieldReuse0;
+                } else {
+                    map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence0 = (decoder).readString(null);
+                    map_field1 .put(key0, charSequence0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), 0));
+            } else {
+                map_field1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        TestRecord.put(0, map_field1);
+        return TestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_1898726132_553331077.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_1898726132_553331077.java
new file mode 100644
index 000000000..cf3e8127c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_1898726132_553331077.java
@@ -0,0 +1,1079 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1898726132_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1898726132_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_1991094399_553331077.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_1991094399_553331077.java
new file mode 100644
index 000000000..f0921db2b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_1991094399_553331077.java
@@ -0,0 +1,1083 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1991094399_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1991094399_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(6);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        tempEnumMapping0 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(6);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        tempEnumMapping1 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(6);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        tempEnumMapping2 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(6);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        tempEnumMapping3 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_553331077_553331077.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_553331077_553331077.java
new file mode 100644
index 000000000..e20d1ffe9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/TestRecord_SpecificDeserializer_553331077_553331077.java
@@ -0,0 +1,1084 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_553331077_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public TestRecord_SpecificDeserializer_553331077_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen16 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen16));
+        }
+        while (chunkLen16 > 0) {
+            for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen16 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_1971822364_1672473580.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_1971822364_1672473580.java
new file mode 100644
index 000000000..43ce689e6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_1971822364_1672473580.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_1971822364_1672473580
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordRecordSchema0;
+
+    public UNION_GenericDeserializer_1971822364_1672473580(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordRecordSchema0 = readerSchema.getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordRecordSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(recordRecordSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_2018567528_1606337179.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_2018567528_1606337179.java
new file mode 100644
index 000000000..a3c060c44
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_2018567528_1606337179.java
@@ -0,0 +1,68 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_2018567528_1606337179
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArraySchema0;
+    private final Schema arrayArrayElemSchema0;
+
+    public UNION_GenericDeserializer_2018567528_1606337179(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArraySchema0 = readerSchema.getTypes().get(1);
+        this.arrayArrayElemSchema0 = arrayArraySchema0 .getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), arrayArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_568621313_1223705675.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_568621313_1223705675.java
new file mode 100644
index 000000000..2f52da001
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UNION_GenericDeserializer_568621313_1223705675.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class UNION_GenericDeserializer_568621313_1223705675
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapSchema0;
+    private final Schema mapMapValueSchema0;
+
+    public UNION_GenericDeserializer_568621313_1223705675(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapSchema0 = readerSchema.getTypes().get(1);
+        this.mapMapValueSchema0 = mapMapSchema0 .getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
new file mode 100644
index 000000000..ee7cf5b1c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV1;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV2;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField>
+{
+
+    private final Schema readerSchema;
+
+    public UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeUnionOfRecordsWithSameNameEnumField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField UnionOfRecordsWithSameNameEnumField;
+        if ((reuse)!= null) {
+            UnionOfRecordsWithSameNameEnumField = ((com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField)(reuse));
+        } else {
+            UnionOfRecordsWithSameNameEnumField = new com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+        return UnionOfRecordsWithSameNameEnumField;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV1 MyRecordV1;
+        if ((reuse)!= null) {
+            MyRecordV1 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV1)(reuse));
+        } else {
+            MyRecordV1 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV1();
+        }
+        MyRecordV1 .put(0, Enums.getConstant(MyEnumV1 .class, (decoder.readEnum())));
+        return MyRecordV1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV2 MyRecordV2;
+        if ((reuse)!= null) {
+            MyRecordV2 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV2)(reuse));
+        } else {
+            MyRecordV2 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV2();
+        }
+        MyRecordV2 .put(0, Enums.getConstant(MyEnumV2 .class, (decoder.readEnum())));
+        return MyRecordV2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/recordName_GenericDeserializer_1743054079_1743054079.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/recordName_GenericDeserializer_1743054079_1743054079.java
new file mode 100644
index 000000000..bd8ae31cd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/recordName_GenericDeserializer_1743054079_1743054079.java
@@ -0,0 +1,67 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class recordName_GenericDeserializer_1743054079_1743054079
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionField0;
+
+    public recordName_GenericDeserializer_1743054079_1743054079(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionField0 = readerSchema.getField("unionField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecordName0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord recordName;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            recordName = ((IndexedRecord)(reuse));
+        } else {
+            recordName = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = recordName.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        recordName.put(0, charSequence0);
+        populate_recordName0((recordName), (customization), (decoder));
+        return recordName;
+    }
+
+    private void populate_recordName0(IndexedRecord recordName, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            recordName.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                recordName.put(1, deserializerecordName0(recordName.get(1), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1025741720_1557256887.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1025741720_1557256887.java
new file mode 100644
index 000000000..b50e5bf24
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1025741720_1557256887.java
@@ -0,0 +1,96 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1025741720_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1025741720_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex1 = (decoder.readIndex());
+                            if (unionIndex1 == 0) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                if (unionIndex1 == 1) {
+                                    someIntsOption0 .put(key0, (decoder.readInt()));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'someIntsOptionValue': "+ unionIndex1));
+                                }
+                            }
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1126840752_2099305627.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1126840752_2099305627.java
new file mode 100644
index 000000000..6e209f6cd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1126840752_2099305627.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1126840752_2099305627
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1126840752_2099305627(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            if (unionIndex0 == 1) {
+                throw new AvroTypeException("Found \"string\", expecting \"int\"");
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someField': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1191367445_653449771.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1191367445_653449771.java
new file mode 100644
index 000000000..dd540d2b8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1191367445_653449771.java
@@ -0,0 +1,69 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1191367445_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1191367445_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        someIntsOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1373882843_1971822364.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1373882843_1971822364.java
new file mode 100644
index 000000000..6e3587e79
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1373882843_1971822364.java
@@ -0,0 +1,45 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1373882843_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1373882843_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            throw new RuntimeException(("Illegal union index for 'someInt': "+ unionIndex0));
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1556659421_711533897.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1556659421_711533897.java
new file mode 100644
index 000000000..e55a88c63
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1556659421_711533897.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1556659421_711533897
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public record_GenericDeserializer_1556659421_711533897(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"subRecord\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"subRecord\",\"fields\":[{\"name\":\"someInt1\",\"type\":\"int\",\"doc\":\"\"},{\"name\":\"someInt2\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1557256887_1025741720.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1557256887_1025741720.java
new file mode 100644
index 000000000..b70ead60f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1557256887_1025741720.java
@@ -0,0 +1,81 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_1025741720
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+    private final Schema someIntsMapValueSchema0;
+
+    public record_GenericDeserializer_1557256887_1025741720(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+        this.someIntsMapValueSchema0 = someIntsMapSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1557256887_753570467.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1557256887_753570467.java
new file mode 100644
index 000000000..770ef901c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1557256887_753570467.java
@@ -0,0 +1,79 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_753570467
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+
+    public record_GenericDeserializer_1557256887_753570467(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1672473580_1971822364.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1672473580_1971822364.java
new file mode 100644
index 000000000..e841902de
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1672473580_1971822364.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1672473580_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1672473580_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                return deserializerecord0((reuse), (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1971822364_1373882843.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1971822364_1373882843.java
new file mode 100644
index 000000000..ae6f5558b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_1971822364_1373882843.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1971822364_1373882843
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInt0;
+
+    public record_GenericDeserializer_1971822364_1373882843(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInt0 = readerSchema.getField("someInt").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_653449771_1191367445.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_653449771_1191367445.java
new file mode 100644
index 000000000..570185253
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_653449771_1191367445.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_1191367445
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+
+    public record_GenericDeserializer_653449771_1191367445(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveIntList someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof PrimitiveIntList) {
+            someInts1 = ((PrimitiveIntList) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_653449771_813379571.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_653449771_813379571.java
new file mode 100644
index 000000000..d156c463b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_653449771_813379571.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_813379571
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+    private final Schema someIntsArrayElemSchema0;
+
+    public record_GenericDeserializer_653449771_813379571(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+        this.someIntsArrayElemSchema0 = someIntsArraySchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof List) {
+            someInts1 = ((List) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new org.apache.avro.generic.GenericData.Array<Integer>(((int) chunkLen0), someIntsArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .add((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_711533897_1556659421.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_711533897_1556659421.java
new file mode 100644
index 000000000..87fdcf4e9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_711533897_1556659421.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_711533897_1556659421
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+    private final Schema subRecordRecordSchema0;
+
+    public record_GenericDeserializer_711533897_1556659421(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordRecordSchema0 = subRecord0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordRecordSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordRecordSchema0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_753570467_1557256887.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_753570467_1557256887.java
new file mode 100644
index 000000000..89387b60f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_753570467_1557256887.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_753570467_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_753570467_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            someIntsOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_813379571_653449771.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_813379571_653449771.java
new file mode 100644
index 000000000..d1b8ca444
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/record_GenericDeserializer_813379571_653449771.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_813379571_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_813379571_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    if (someIntsOption0 instanceof GenericArray) {
+                        ((GenericArray) someIntsOption0).reset();
+                    } else {
+                        someIntsOption0 .clear();
+                    }
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object someIntsOptionArrayElementReuseVar0 = null;
+                        if (oldArray0 instanceof GenericArray) {
+                            someIntsOptionArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                        }
+                        int unionIndex1 = (decoder.readIndex());
+                        if (unionIndex1 == 0) {
+                            someIntsOption0 .addPrimitive((decoder.readInt()));
+                        } else {
+                            if (unionIndex1 == 1) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'someIntsOptionElem': "+ unionIndex1));
+                            }
+                        }
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/testRecord_GenericDeserializer_1146484089_1256982207.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/testRecord_GenericDeserializer_1146484089_1256982207.java
new file mode 100644
index 000000000..f38aa9a72
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_10/testRecord_GenericDeserializer_1146484089_1256982207.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class testRecord_GenericDeserializer_1146484089_1256982207
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+
+    public testRecord_GenericDeserializer_1146484089_1256982207(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.testEnum: No match for C"));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializetestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord testRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            testRecord = ((IndexedRecord)(reuse));
+        } else {
+            testRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        testRecord.put(0, enumValue0);
+        return testRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_BOOLEAN_GenericSerializer_869749973.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_BOOLEAN_GenericSerializer_869749973.java
new file mode 100644
index 000000000..07f8aab2b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_BOOLEAN_GenericSerializer_869749973.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_BOOLEAN_GenericSerializer_869749973
+    implements FastSerializer<List<Boolean>>
+{
+
+
+    public void serialize(List<Boolean> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveBooleanList) {
+                PrimitiveBooleanList primitiveList0 = ((PrimitiveBooleanList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_DOUBLE_GenericSerializer_18760307.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_DOUBLE_GenericSerializer_18760307.java
new file mode 100644
index 000000000..b7541e650
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_DOUBLE_GenericSerializer_18760307.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_DOUBLE_GenericSerializer_18760307
+    implements FastSerializer<List<Double>>
+{
+
+
+    public void serialize(List<Double> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveDoubleList) {
+                PrimitiveDoubleList primitiveList0 = ((PrimitiveDoubleList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_FLOAT_GenericSerializer_1012670397.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_FLOAT_GenericSerializer_1012670397.java
new file mode 100644
index 000000000..4fb9dc8cb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_FLOAT_GenericSerializer_1012670397.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_FLOAT_GenericSerializer_1012670397
+    implements FastSerializer<List<Float>>
+{
+
+
+    public void serialize(List<Float> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_INT_GenericSerializer_1012089072.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_INT_GenericSerializer_1012089072.java
new file mode 100644
index 000000000..a15948aee
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_INT_GenericSerializer_1012089072.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_INT_GenericSerializer_1012089072
+    implements FastSerializer<List<Integer>>
+{
+
+
+    public void serialize(List<Integer> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_LONG_GenericSerializer_325099267.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_LONG_GenericSerializer_325099267.java
new file mode 100644
index 000000000..ee5e9264c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_LONG_GenericSerializer_325099267.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_LONG_GenericSerializer_325099267
+    implements FastSerializer<List<Long>>
+{
+
+
+    public void serialize(List<Long> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveLongList) {
+                PrimitiveLongList primitiveList0 = ((PrimitiveLongList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_UNION_GenericSerializer_777827233.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_UNION_GenericSerializer_777827233.java
new file mode 100644
index 000000000..acc19167d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_UNION_GenericSerializer_777827233.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericSerializer_777827233
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord union0 = null;
+                union0 = ((List<IndexedRecord> ) data).get(counter0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_record_GenericSerializer_477614132.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_record_GenericSerializer_477614132.java
new file mode 100644
index 000000000..e567befcf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Array_of_record_GenericSerializer_477614132.java
@@ -0,0 +1,53 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericSerializer_477614132
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord record0 = null;
+                record0 = ((List<IndexedRecord> ) data).get(counter0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
new file mode 100644
index 000000000..68b26a174
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
@@ -0,0 +1,4527 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        (encoder).writeInt(((Integer) data.get(2)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(3)));
+        (encoder).writeInt(((Integer) data.get(4)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(5)));
+        (encoder).writeInt(((Integer) data.get(6)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(7)));
+        (encoder).writeInt(((Integer) data.get(8)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(9)));
+        (encoder).writeInt(((Integer) data.get(10)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(11)));
+        (encoder).writeInt(((Integer) data.get(12)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(13)));
+        (encoder).writeInt(((Integer) data.get(14)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(15)));
+        (encoder).writeInt(((Integer) data.get(16)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(17)));
+        (encoder).writeInt(((Integer) data.get(18)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(19)));
+        (encoder).writeInt(((Integer) data.get(20)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(21)));
+        (encoder).writeInt(((Integer) data.get(22)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(23)));
+        (encoder).writeInt(((Integer) data.get(24)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(25)));
+        (encoder).writeInt(((Integer) data.get(26)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(27)));
+        (encoder).writeInt(((Integer) data.get(28)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(29)));
+        (encoder).writeInt(((Integer) data.get(30)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(31)));
+        (encoder).writeInt(((Integer) data.get(32)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(33)));
+        (encoder).writeInt(((Integer) data.get(34)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(35)));
+        (encoder).writeInt(((Integer) data.get(36)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(37)));
+        (encoder).writeInt(((Integer) data.get(38)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(39)));
+        (encoder).writeInt(((Integer) data.get(40)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(41)));
+        (encoder).writeInt(((Integer) data.get(42)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(43)));
+        (encoder).writeInt(((Integer) data.get(44)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(45)));
+        (encoder).writeInt(((Integer) data.get(46)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(47)));
+        (encoder).writeInt(((Integer) data.get(48)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(49)));
+        (encoder).writeInt(((Integer) data.get(50)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(51)));
+        (encoder).writeInt(((Integer) data.get(52)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(53)));
+        (encoder).writeInt(((Integer) data.get(54)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(55)));
+        (encoder).writeInt(((Integer) data.get(56)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(57)));
+        (encoder).writeInt(((Integer) data.get(58)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(59)));
+        (encoder).writeInt(((Integer) data.get(60)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(61)));
+        (encoder).writeInt(((Integer) data.get(62)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(63)));
+        (encoder).writeInt(((Integer) data.get(64)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(65)));
+        (encoder).writeInt(((Integer) data.get(66)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(67)));
+        (encoder).writeInt(((Integer) data.get(68)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(69)));
+        (encoder).writeInt(((Integer) data.get(70)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(71)));
+        (encoder).writeInt(((Integer) data.get(72)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(73)));
+        (encoder).writeInt(((Integer) data.get(74)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(75)));
+        (encoder).writeInt(((Integer) data.get(76)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(77)));
+        (encoder).writeInt(((Integer) data.get(78)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(79)));
+        (encoder).writeInt(((Integer) data.get(80)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(81)));
+        (encoder).writeInt(((Integer) data.get(82)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(83)));
+        (encoder).writeInt(((Integer) data.get(84)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(85)));
+        (encoder).writeInt(((Integer) data.get(86)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(87)));
+        (encoder).writeInt(((Integer) data.get(88)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(89)));
+        (encoder).writeInt(((Integer) data.get(90)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(91)));
+        (encoder).writeInt(((Integer) data.get(92)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(93)));
+        (encoder).writeInt(((Integer) data.get(94)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(95)));
+        (encoder).writeInt(((Integer) data.get(96)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(97)));
+        (encoder).writeInt(((Integer) data.get(98)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(99)));
+        (encoder).writeInt(((Integer) data.get(100)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(101)));
+        (encoder).writeInt(((Integer) data.get(102)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(103)));
+        (encoder).writeInt(((Integer) data.get(104)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(105)));
+        (encoder).writeInt(((Integer) data.get(106)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(107)));
+        (encoder).writeInt(((Integer) data.get(108)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(109)));
+        (encoder).writeInt(((Integer) data.get(110)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(111)));
+        (encoder).writeInt(((Integer) data.get(112)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(113)));
+        (encoder).writeInt(((Integer) data.get(114)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(115)));
+        (encoder).writeInt(((Integer) data.get(116)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(117)));
+        (encoder).writeInt(((Integer) data.get(118)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(119)));
+        (encoder).writeInt(((Integer) data.get(120)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(121)));
+        (encoder).writeInt(((Integer) data.get(122)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(123)));
+        (encoder).writeInt(((Integer) data.get(124)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(125)));
+        (encoder).writeInt(((Integer) data.get(126)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(127)));
+        (encoder).writeInt(((Integer) data.get(128)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(129)));
+        (encoder).writeInt(((Integer) data.get(130)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(131)));
+        (encoder).writeInt(((Integer) data.get(132)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(133)));
+        (encoder).writeInt(((Integer) data.get(134)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(135)));
+        (encoder).writeInt(((Integer) data.get(136)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(137)));
+        (encoder).writeInt(((Integer) data.get(138)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(139)));
+        (encoder).writeInt(((Integer) data.get(140)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(141)));
+        (encoder).writeInt(((Integer) data.get(142)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(143)));
+        (encoder).writeInt(((Integer) data.get(144)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(145)));
+        (encoder).writeInt(((Integer) data.get(146)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(147)));
+        (encoder).writeInt(((Integer) data.get(148)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(149)));
+        (encoder).writeInt(((Integer) data.get(150)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(151)));
+        (encoder).writeInt(((Integer) data.get(152)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(153)));
+        (encoder).writeInt(((Integer) data.get(154)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(155)));
+        (encoder).writeInt(((Integer) data.get(156)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(157)));
+        (encoder).writeInt(((Integer) data.get(158)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(159)));
+        (encoder).writeInt(((Integer) data.get(160)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(161)));
+        (encoder).writeInt(((Integer) data.get(162)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(163)));
+        (encoder).writeInt(((Integer) data.get(164)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(165)));
+        (encoder).writeInt(((Integer) data.get(166)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(167)));
+        (encoder).writeInt(((Integer) data.get(168)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(169)));
+        (encoder).writeInt(((Integer) data.get(170)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(171)));
+        (encoder).writeInt(((Integer) data.get(172)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(173)));
+        (encoder).writeInt(((Integer) data.get(174)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(175)));
+        (encoder).writeInt(((Integer) data.get(176)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(177)));
+        (encoder).writeInt(((Integer) data.get(178)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(179)));
+        (encoder).writeInt(((Integer) data.get(180)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(181)));
+        (encoder).writeInt(((Integer) data.get(182)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(183)));
+        (encoder).writeInt(((Integer) data.get(184)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(185)));
+        (encoder).writeInt(((Integer) data.get(186)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(187)));
+        (encoder).writeInt(((Integer) data.get(188)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(189)));
+        (encoder).writeInt(((Integer) data.get(190)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(191)));
+        (encoder).writeInt(((Integer) data.get(192)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(193)));
+        (encoder).writeInt(((Integer) data.get(194)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(195)));
+        (encoder).writeInt(((Integer) data.get(196)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(197)));
+        (encoder).writeInt(((Integer) data.get(198)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(199)));
+        (encoder).writeInt(((Integer) data.get(200)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(201)));
+        (encoder).writeInt(((Integer) data.get(202)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(203)));
+        (encoder).writeInt(((Integer) data.get(204)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(205)));
+        (encoder).writeInt(((Integer) data.get(206)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(207)));
+        (encoder).writeInt(((Integer) data.get(208)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(209)));
+        (encoder).writeInt(((Integer) data.get(210)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(211)));
+        (encoder).writeInt(((Integer) data.get(212)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(213)));
+        (encoder).writeInt(((Integer) data.get(214)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(215)));
+        (encoder).writeInt(((Integer) data.get(216)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(217)));
+        (encoder).writeInt(((Integer) data.get(218)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(219)));
+        (encoder).writeInt(((Integer) data.get(220)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(221)));
+        (encoder).writeInt(((Integer) data.get(222)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(223)));
+        (encoder).writeInt(((Integer) data.get(224)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(225)));
+        (encoder).writeInt(((Integer) data.get(226)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(227)));
+        (encoder).writeInt(((Integer) data.get(228)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(229)));
+        (encoder).writeInt(((Integer) data.get(230)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(231)));
+        (encoder).writeInt(((Integer) data.get(232)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(233)));
+        (encoder).writeInt(((Integer) data.get(234)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(235)));
+        (encoder).writeInt(((Integer) data.get(236)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(237)));
+        (encoder).writeInt(((Integer) data.get(238)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(239)));
+        (encoder).writeInt(((Integer) data.get(240)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(241)));
+        (encoder).writeInt(((Integer) data.get(242)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(243)));
+        (encoder).writeInt(((Integer) data.get(244)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(245)));
+        (encoder).writeInt(((Integer) data.get(246)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(247)));
+        (encoder).writeInt(((Integer) data.get(248)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(249)));
+        (encoder).writeInt(((Integer) data.get(250)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(251)));
+        (encoder).writeInt(((Integer) data.get(252)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(253)));
+        (encoder).writeInt(((Integer) data.get(254)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(255)));
+        (encoder).writeInt(((Integer) data.get(256)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(257)));
+        (encoder).writeInt(((Integer) data.get(258)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(259)));
+        (encoder).writeInt(((Integer) data.get(260)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(261)));
+        (encoder).writeInt(((Integer) data.get(262)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(263)));
+        (encoder).writeInt(((Integer) data.get(264)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(265)));
+        (encoder).writeInt(((Integer) data.get(266)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(267)));
+        (encoder).writeInt(((Integer) data.get(268)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(269)));
+        (encoder).writeInt(((Integer) data.get(270)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(271)));
+        (encoder).writeInt(((Integer) data.get(272)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(273)));
+        (encoder).writeInt(((Integer) data.get(274)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(275)));
+        (encoder).writeInt(((Integer) data.get(276)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(277)));
+        (encoder).writeInt(((Integer) data.get(278)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(279)));
+        (encoder).writeInt(((Integer) data.get(280)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(281)));
+        (encoder).writeInt(((Integer) data.get(282)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(283)));
+        (encoder).writeInt(((Integer) data.get(284)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(285)));
+        (encoder).writeInt(((Integer) data.get(286)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(287)));
+        (encoder).writeInt(((Integer) data.get(288)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(289)));
+        (encoder).writeInt(((Integer) data.get(290)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(291)));
+        (encoder).writeInt(((Integer) data.get(292)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(293)));
+        (encoder).writeInt(((Integer) data.get(294)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(295)));
+        (encoder).writeInt(((Integer) data.get(296)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(297)));
+        (encoder).writeInt(((Integer) data.get(298)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(299)));
+        (encoder).writeInt(((Integer) data.get(300)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(301)));
+        (encoder).writeInt(((Integer) data.get(302)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(303)));
+        (encoder).writeInt(((Integer) data.get(304)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(305)));
+        (encoder).writeInt(((Integer) data.get(306)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(307)));
+        (encoder).writeInt(((Integer) data.get(308)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(309)));
+        (encoder).writeInt(((Integer) data.get(310)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(311)));
+        (encoder).writeInt(((Integer) data.get(312)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(313)));
+        (encoder).writeInt(((Integer) data.get(314)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(315)));
+        (encoder).writeInt(((Integer) data.get(316)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(317)));
+        (encoder).writeInt(((Integer) data.get(318)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(319)));
+        (encoder).writeInt(((Integer) data.get(320)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(321)));
+        (encoder).writeInt(((Integer) data.get(322)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(323)));
+        (encoder).writeInt(((Integer) data.get(324)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(325)));
+        (encoder).writeInt(((Integer) data.get(326)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(327)));
+        (encoder).writeInt(((Integer) data.get(328)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(329)));
+        (encoder).writeInt(((Integer) data.get(330)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(331)));
+        (encoder).writeInt(((Integer) data.get(332)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(333)));
+        (encoder).writeInt(((Integer) data.get(334)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(335)));
+        (encoder).writeInt(((Integer) data.get(336)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(337)));
+        (encoder).writeInt(((Integer) data.get(338)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(339)));
+        (encoder).writeInt(((Integer) data.get(340)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(341)));
+        (encoder).writeInt(((Integer) data.get(342)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(343)));
+        (encoder).writeInt(((Integer) data.get(344)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(345)));
+        (encoder).writeInt(((Integer) data.get(346)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(347)));
+        (encoder).writeInt(((Integer) data.get(348)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(349)));
+        (encoder).writeInt(((Integer) data.get(350)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(351)));
+        (encoder).writeInt(((Integer) data.get(352)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(353)));
+        (encoder).writeInt(((Integer) data.get(354)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(355)));
+        (encoder).writeInt(((Integer) data.get(356)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(357)));
+        (encoder).writeInt(((Integer) data.get(358)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(359)));
+        (encoder).writeInt(((Integer) data.get(360)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(361)));
+        (encoder).writeInt(((Integer) data.get(362)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(363)));
+        (encoder).writeInt(((Integer) data.get(364)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(365)));
+        (encoder).writeInt(((Integer) data.get(366)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(367)));
+        (encoder).writeInt(((Integer) data.get(368)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(369)));
+        (encoder).writeInt(((Integer) data.get(370)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(371)));
+        (encoder).writeInt(((Integer) data.get(372)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(373)));
+        (encoder).writeInt(((Integer) data.get(374)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(375)));
+        (encoder).writeInt(((Integer) data.get(376)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(377)));
+        (encoder).writeInt(((Integer) data.get(378)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(379)));
+        (encoder).writeInt(((Integer) data.get(380)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(381)));
+        (encoder).writeInt(((Integer) data.get(382)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(383)));
+        (encoder).writeInt(((Integer) data.get(384)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(385)));
+        (encoder).writeInt(((Integer) data.get(386)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(387)));
+        (encoder).writeInt(((Integer) data.get(388)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(389)));
+        (encoder).writeInt(((Integer) data.get(390)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(391)));
+        (encoder).writeInt(((Integer) data.get(392)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(393)));
+        (encoder).writeInt(((Integer) data.get(394)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(395)));
+        (encoder).writeInt(((Integer) data.get(396)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(397)));
+        (encoder).writeInt(((Integer) data.get(398)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(399)));
+        (encoder).writeInt(((Integer) data.get(400)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(401)));
+        (encoder).writeInt(((Integer) data.get(402)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(403)));
+        (encoder).writeInt(((Integer) data.get(404)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(405)));
+        (encoder).writeInt(((Integer) data.get(406)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(407)));
+        (encoder).writeInt(((Integer) data.get(408)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(409)));
+        (encoder).writeInt(((Integer) data.get(410)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(411)));
+        (encoder).writeInt(((Integer) data.get(412)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(413)));
+        (encoder).writeInt(((Integer) data.get(414)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(415)));
+        (encoder).writeInt(((Integer) data.get(416)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(417)));
+        (encoder).writeInt(((Integer) data.get(418)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(419)));
+        (encoder).writeInt(((Integer) data.get(420)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(421)));
+        (encoder).writeInt(((Integer) data.get(422)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(423)));
+        (encoder).writeInt(((Integer) data.get(424)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(425)));
+        (encoder).writeInt(((Integer) data.get(426)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(427)));
+        (encoder).writeInt(((Integer) data.get(428)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(429)));
+        (encoder).writeInt(((Integer) data.get(430)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(431)));
+        (encoder).writeInt(((Integer) data.get(432)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(433)));
+        (encoder).writeInt(((Integer) data.get(434)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(435)));
+        (encoder).writeInt(((Integer) data.get(436)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(437)));
+        (encoder).writeInt(((Integer) data.get(438)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(439)));
+        (encoder).writeInt(((Integer) data.get(440)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(441)));
+        (encoder).writeInt(((Integer) data.get(442)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(443)));
+        (encoder).writeInt(((Integer) data.get(444)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(445)));
+        (encoder).writeInt(((Integer) data.get(446)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(447)));
+        (encoder).writeInt(((Integer) data.get(448)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(449)));
+        (encoder).writeInt(((Integer) data.get(450)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(451)));
+        (encoder).writeInt(((Integer) data.get(452)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(453)));
+        (encoder).writeInt(((Integer) data.get(454)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(455)));
+        (encoder).writeInt(((Integer) data.get(456)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(457)));
+        (encoder).writeInt(((Integer) data.get(458)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(459)));
+        (encoder).writeInt(((Integer) data.get(460)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(461)));
+        (encoder).writeInt(((Integer) data.get(462)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(463)));
+        (encoder).writeInt(((Integer) data.get(464)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(465)));
+        (encoder).writeInt(((Integer) data.get(466)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(467)));
+        (encoder).writeInt(((Integer) data.get(468)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(469)));
+        (encoder).writeInt(((Integer) data.get(470)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(471)));
+        (encoder).writeInt(((Integer) data.get(472)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(473)));
+        (encoder).writeInt(((Integer) data.get(474)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(475)));
+        (encoder).writeInt(((Integer) data.get(476)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(477)));
+        (encoder).writeInt(((Integer) data.get(478)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(479)));
+        (encoder).writeInt(((Integer) data.get(480)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(481)));
+        (encoder).writeInt(((Integer) data.get(482)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(483)));
+        (encoder).writeInt(((Integer) data.get(484)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(485)));
+        (encoder).writeInt(((Integer) data.get(486)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(487)));
+        (encoder).writeInt(((Integer) data.get(488)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(489)));
+        (encoder).writeInt(((Integer) data.get(490)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(491)));
+        (encoder).writeInt(((Integer) data.get(492)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(493)));
+        (encoder).writeInt(((Integer) data.get(494)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(495)));
+        (encoder).writeInt(((Integer) data.get(496)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(497)));
+        (encoder).writeInt(((Integer) data.get(498)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(499)));
+        (encoder).writeInt(((Integer) data.get(500)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(501)));
+        (encoder).writeInt(((Integer) data.get(502)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(503)));
+        (encoder).writeInt(((Integer) data.get(504)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(505)));
+        (encoder).writeInt(((Integer) data.get(506)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(507)));
+        (encoder).writeInt(((Integer) data.get(508)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(509)));
+        (encoder).writeInt(((Integer) data.get(510)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(511)));
+        (encoder).writeInt(((Integer) data.get(512)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(513)));
+        (encoder).writeInt(((Integer) data.get(514)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(515)));
+        (encoder).writeInt(((Integer) data.get(516)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(517)));
+        (encoder).writeInt(((Integer) data.get(518)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(519)));
+        (encoder).writeInt(((Integer) data.get(520)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(521)));
+        (encoder).writeInt(((Integer) data.get(522)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(523)));
+        (encoder).writeInt(((Integer) data.get(524)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(525)));
+        (encoder).writeInt(((Integer) data.get(526)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(527)));
+        (encoder).writeInt(((Integer) data.get(528)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(529)));
+        (encoder).writeInt(((Integer) data.get(530)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(531)));
+        (encoder).writeInt(((Integer) data.get(532)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(533)));
+        (encoder).writeInt(((Integer) data.get(534)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(535)));
+        (encoder).writeInt(((Integer) data.get(536)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(537)));
+        (encoder).writeInt(((Integer) data.get(538)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(539)));
+        (encoder).writeInt(((Integer) data.get(540)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(541)));
+        (encoder).writeInt(((Integer) data.get(542)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(543)));
+        (encoder).writeInt(((Integer) data.get(544)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(545)));
+        (encoder).writeInt(((Integer) data.get(546)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(547)));
+        (encoder).writeInt(((Integer) data.get(548)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(549)));
+        (encoder).writeInt(((Integer) data.get(550)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(551)));
+        (encoder).writeInt(((Integer) data.get(552)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(553)));
+        (encoder).writeInt(((Integer) data.get(554)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(555)));
+        (encoder).writeInt(((Integer) data.get(556)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(557)));
+        (encoder).writeInt(((Integer) data.get(558)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(559)));
+        (encoder).writeInt(((Integer) data.get(560)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(561)));
+        (encoder).writeInt(((Integer) data.get(562)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(563)));
+        (encoder).writeInt(((Integer) data.get(564)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(565)));
+        (encoder).writeInt(((Integer) data.get(566)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(567)));
+        (encoder).writeInt(((Integer) data.get(568)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(569)));
+        (encoder).writeInt(((Integer) data.get(570)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(571)));
+        (encoder).writeInt(((Integer) data.get(572)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(573)));
+        (encoder).writeInt(((Integer) data.get(574)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(575)));
+        (encoder).writeInt(((Integer) data.get(576)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(577)));
+        (encoder).writeInt(((Integer) data.get(578)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(579)));
+        (encoder).writeInt(((Integer) data.get(580)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(581)));
+        (encoder).writeInt(((Integer) data.get(582)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(583)));
+        (encoder).writeInt(((Integer) data.get(584)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(585)));
+        (encoder).writeInt(((Integer) data.get(586)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(587)));
+        (encoder).writeInt(((Integer) data.get(588)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(589)));
+        (encoder).writeInt(((Integer) data.get(590)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(591)));
+        (encoder).writeInt(((Integer) data.get(592)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(593)));
+        (encoder).writeInt(((Integer) data.get(594)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(595)));
+        (encoder).writeInt(((Integer) data.get(596)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(597)));
+        (encoder).writeInt(((Integer) data.get(598)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(599)));
+        (encoder).writeInt(((Integer) data.get(600)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(601)));
+        (encoder).writeInt(((Integer) data.get(602)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(603)));
+        (encoder).writeInt(((Integer) data.get(604)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(605)));
+        (encoder).writeInt(((Integer) data.get(606)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(607)));
+        (encoder).writeInt(((Integer) data.get(608)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(609)));
+        (encoder).writeInt(((Integer) data.get(610)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(611)));
+        (encoder).writeInt(((Integer) data.get(612)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(613)));
+        (encoder).writeInt(((Integer) data.get(614)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(615)));
+        (encoder).writeInt(((Integer) data.get(616)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(617)));
+        (encoder).writeInt(((Integer) data.get(618)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(619)));
+        (encoder).writeInt(((Integer) data.get(620)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(621)));
+        (encoder).writeInt(((Integer) data.get(622)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(623)));
+        (encoder).writeInt(((Integer) data.get(624)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(625)));
+        (encoder).writeInt(((Integer) data.get(626)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(627)));
+        (encoder).writeInt(((Integer) data.get(628)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(629)));
+        (encoder).writeInt(((Integer) data.get(630)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(631)));
+        (encoder).writeInt(((Integer) data.get(632)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(633)));
+        (encoder).writeInt(((Integer) data.get(634)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(635)));
+        (encoder).writeInt(((Integer) data.get(636)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(637)));
+        (encoder).writeInt(((Integer) data.get(638)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(639)));
+        (encoder).writeInt(((Integer) data.get(640)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(641)));
+        (encoder).writeInt(((Integer) data.get(642)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(643)));
+        (encoder).writeInt(((Integer) data.get(644)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(645)));
+        (encoder).writeInt(((Integer) data.get(646)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(647)));
+        (encoder).writeInt(((Integer) data.get(648)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(649)));
+        (encoder).writeInt(((Integer) data.get(650)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(651)));
+        (encoder).writeInt(((Integer) data.get(652)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(653)));
+        (encoder).writeInt(((Integer) data.get(654)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(655)));
+        (encoder).writeInt(((Integer) data.get(656)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(657)));
+        (encoder).writeInt(((Integer) data.get(658)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(659)));
+        (encoder).writeInt(((Integer) data.get(660)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(661)));
+        (encoder).writeInt(((Integer) data.get(662)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(663)));
+        (encoder).writeInt(((Integer) data.get(664)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(665)));
+        (encoder).writeInt(((Integer) data.get(666)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(667)));
+        (encoder).writeInt(((Integer) data.get(668)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(669)));
+        (encoder).writeInt(((Integer) data.get(670)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(671)));
+        (encoder).writeInt(((Integer) data.get(672)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(673)));
+        (encoder).writeInt(((Integer) data.get(674)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(675)));
+        (encoder).writeInt(((Integer) data.get(676)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(677)));
+        (encoder).writeInt(((Integer) data.get(678)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(679)));
+        (encoder).writeInt(((Integer) data.get(680)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(681)));
+        (encoder).writeInt(((Integer) data.get(682)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(683)));
+        (encoder).writeInt(((Integer) data.get(684)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(685)));
+        (encoder).writeInt(((Integer) data.get(686)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(687)));
+        (encoder).writeInt(((Integer) data.get(688)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(689)));
+        (encoder).writeInt(((Integer) data.get(690)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(691)));
+        (encoder).writeInt(((Integer) data.get(692)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(693)));
+        (encoder).writeInt(((Integer) data.get(694)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(695)));
+        (encoder).writeInt(((Integer) data.get(696)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(697)));
+        (encoder).writeInt(((Integer) data.get(698)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(699)));
+        (encoder).writeInt(((Integer) data.get(700)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(701)));
+        (encoder).writeInt(((Integer) data.get(702)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(703)));
+        (encoder).writeInt(((Integer) data.get(704)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(705)));
+        (encoder).writeInt(((Integer) data.get(706)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(707)));
+        (encoder).writeInt(((Integer) data.get(708)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(709)));
+        (encoder).writeInt(((Integer) data.get(710)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(711)));
+        (encoder).writeInt(((Integer) data.get(712)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(713)));
+        (encoder).writeInt(((Integer) data.get(714)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(715)));
+        (encoder).writeInt(((Integer) data.get(716)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(717)));
+        (encoder).writeInt(((Integer) data.get(718)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(719)));
+        (encoder).writeInt(((Integer) data.get(720)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(721)));
+        (encoder).writeInt(((Integer) data.get(722)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(723)));
+        (encoder).writeInt(((Integer) data.get(724)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(725)));
+        (encoder).writeInt(((Integer) data.get(726)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(727)));
+        (encoder).writeInt(((Integer) data.get(728)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(729)));
+        (encoder).writeInt(((Integer) data.get(730)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(731)));
+        (encoder).writeInt(((Integer) data.get(732)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(733)));
+        (encoder).writeInt(((Integer) data.get(734)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(735)));
+        (encoder).writeInt(((Integer) data.get(736)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(737)));
+        (encoder).writeInt(((Integer) data.get(738)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(739)));
+        (encoder).writeInt(((Integer) data.get(740)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(741)));
+        (encoder).writeInt(((Integer) data.get(742)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(743)));
+        (encoder).writeInt(((Integer) data.get(744)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(745)));
+        (encoder).writeInt(((Integer) data.get(746)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(747)));
+        (encoder).writeInt(((Integer) data.get(748)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(749)));
+        (encoder).writeInt(((Integer) data.get(750)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(751)));
+        (encoder).writeInt(((Integer) data.get(752)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(753)));
+        (encoder).writeInt(((Integer) data.get(754)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(755)));
+        (encoder).writeInt(((Integer) data.get(756)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(757)));
+        (encoder).writeInt(((Integer) data.get(758)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(759)));
+        (encoder).writeInt(((Integer) data.get(760)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(761)));
+        (encoder).writeInt(((Integer) data.get(762)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(763)));
+        (encoder).writeInt(((Integer) data.get(764)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(765)));
+        (encoder).writeInt(((Integer) data.get(766)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(767)));
+        (encoder).writeInt(((Integer) data.get(768)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(769)));
+        (encoder).writeInt(((Integer) data.get(770)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(771)));
+        (encoder).writeInt(((Integer) data.get(772)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(773)));
+        (encoder).writeInt(((Integer) data.get(774)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(775)));
+        (encoder).writeInt(((Integer) data.get(776)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(777)));
+        (encoder).writeInt(((Integer) data.get(778)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(779)));
+        (encoder).writeInt(((Integer) data.get(780)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(781)));
+        (encoder).writeInt(((Integer) data.get(782)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(783)));
+        (encoder).writeInt(((Integer) data.get(784)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(785)));
+        (encoder).writeInt(((Integer) data.get(786)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(787)));
+        (encoder).writeInt(((Integer) data.get(788)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(789)));
+        (encoder).writeInt(((Integer) data.get(790)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(791)));
+        (encoder).writeInt(((Integer) data.get(792)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(793)));
+        (encoder).writeInt(((Integer) data.get(794)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(795)));
+        (encoder).writeInt(((Integer) data.get(796)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(797)));
+        (encoder).writeInt(((Integer) data.get(798)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(799)));
+        (encoder).writeInt(((Integer) data.get(800)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(801)));
+        (encoder).writeInt(((Integer) data.get(802)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(803)));
+        (encoder).writeInt(((Integer) data.get(804)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(805)));
+        (encoder).writeInt(((Integer) data.get(806)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(807)));
+        (encoder).writeInt(((Integer) data.get(808)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(809)));
+        (encoder).writeInt(((Integer) data.get(810)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(811)));
+        (encoder).writeInt(((Integer) data.get(812)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(813)));
+        (encoder).writeInt(((Integer) data.get(814)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(815)));
+        (encoder).writeInt(((Integer) data.get(816)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(817)));
+        (encoder).writeInt(((Integer) data.get(818)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(819)));
+        (encoder).writeInt(((Integer) data.get(820)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(821)));
+        (encoder).writeInt(((Integer) data.get(822)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(823)));
+        (encoder).writeInt(((Integer) data.get(824)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(825)));
+        (encoder).writeInt(((Integer) data.get(826)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(827)));
+        (encoder).writeInt(((Integer) data.get(828)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(829)));
+        (encoder).writeInt(((Integer) data.get(830)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(831)));
+        (encoder).writeInt(((Integer) data.get(832)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(833)));
+        (encoder).writeInt(((Integer) data.get(834)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(835)));
+        (encoder).writeInt(((Integer) data.get(836)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(837)));
+        (encoder).writeInt(((Integer) data.get(838)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(839)));
+        (encoder).writeInt(((Integer) data.get(840)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(841)));
+        (encoder).writeInt(((Integer) data.get(842)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(843)));
+        (encoder).writeInt(((Integer) data.get(844)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(845)));
+        (encoder).writeInt(((Integer) data.get(846)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(847)));
+        (encoder).writeInt(((Integer) data.get(848)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(849)));
+        (encoder).writeInt(((Integer) data.get(850)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(851)));
+        (encoder).writeInt(((Integer) data.get(852)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(853)));
+        (encoder).writeInt(((Integer) data.get(854)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(855)));
+        (encoder).writeInt(((Integer) data.get(856)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(857)));
+        (encoder).writeInt(((Integer) data.get(858)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(859)));
+        (encoder).writeInt(((Integer) data.get(860)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(861)));
+        (encoder).writeInt(((Integer) data.get(862)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(863)));
+        (encoder).writeInt(((Integer) data.get(864)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(865)));
+        (encoder).writeInt(((Integer) data.get(866)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(867)));
+        (encoder).writeInt(((Integer) data.get(868)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(869)));
+        (encoder).writeInt(((Integer) data.get(870)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(871)));
+        (encoder).writeInt(((Integer) data.get(872)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(873)));
+        (encoder).writeInt(((Integer) data.get(874)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(875)));
+        (encoder).writeInt(((Integer) data.get(876)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(877)));
+        (encoder).writeInt(((Integer) data.get(878)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(879)));
+        (encoder).writeInt(((Integer) data.get(880)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(881)));
+        (encoder).writeInt(((Integer) data.get(882)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(883)));
+        (encoder).writeInt(((Integer) data.get(884)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(885)));
+        (encoder).writeInt(((Integer) data.get(886)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(887)));
+        (encoder).writeInt(((Integer) data.get(888)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(889)));
+        (encoder).writeInt(((Integer) data.get(890)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(891)));
+        (encoder).writeInt(((Integer) data.get(892)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(893)));
+        (encoder).writeInt(((Integer) data.get(894)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(895)));
+        (encoder).writeInt(((Integer) data.get(896)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(897)));
+        (encoder).writeInt(((Integer) data.get(898)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(899)));
+        (encoder).writeInt(((Integer) data.get(900)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(901)));
+        (encoder).writeInt(((Integer) data.get(902)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(903)));
+        (encoder).writeInt(((Integer) data.get(904)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(905)));
+        (encoder).writeInt(((Integer) data.get(906)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(907)));
+        (encoder).writeInt(((Integer) data.get(908)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(909)));
+        (encoder).writeInt(((Integer) data.get(910)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(911)));
+        (encoder).writeInt(((Integer) data.get(912)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(913)));
+        (encoder).writeInt(((Integer) data.get(914)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(915)));
+        (encoder).writeInt(((Integer) data.get(916)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(917)));
+        (encoder).writeInt(((Integer) data.get(918)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(919)));
+        (encoder).writeInt(((Integer) data.get(920)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(921)));
+        (encoder).writeInt(((Integer) data.get(922)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(923)));
+        (encoder).writeInt(((Integer) data.get(924)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(925)));
+        (encoder).writeInt(((Integer) data.get(926)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(927)));
+        (encoder).writeInt(((Integer) data.get(928)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(929)));
+        (encoder).writeInt(((Integer) data.get(930)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(931)));
+        (encoder).writeInt(((Integer) data.get(932)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(933)));
+        (encoder).writeInt(((Integer) data.get(934)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(935)));
+        (encoder).writeInt(((Integer) data.get(936)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(937)));
+        (encoder).writeInt(((Integer) data.get(938)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(939)));
+        (encoder).writeInt(((Integer) data.get(940)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(941)));
+        (encoder).writeInt(((Integer) data.get(942)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(943)));
+        (encoder).writeInt(((Integer) data.get(944)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(945)));
+        (encoder).writeInt(((Integer) data.get(946)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(947)));
+        (encoder).writeInt(((Integer) data.get(948)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(949)));
+        (encoder).writeInt(((Integer) data.get(950)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(951)));
+        (encoder).writeInt(((Integer) data.get(952)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(953)));
+        (encoder).writeInt(((Integer) data.get(954)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(955)));
+        (encoder).writeInt(((Integer) data.get(956)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(957)));
+        (encoder).writeInt(((Integer) data.get(958)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(959)));
+        (encoder).writeInt(((Integer) data.get(960)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(961)));
+        (encoder).writeInt(((Integer) data.get(962)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(963)));
+        (encoder).writeInt(((Integer) data.get(964)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(965)));
+        (encoder).writeInt(((Integer) data.get(966)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(967)));
+        (encoder).writeInt(((Integer) data.get(968)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(969)));
+        (encoder).writeInt(((Integer) data.get(970)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(971)));
+        (encoder).writeInt(((Integer) data.get(972)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(973)));
+        (encoder).writeInt(((Integer) data.get(974)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(975)));
+        (encoder).writeInt(((Integer) data.get(976)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(977)));
+        (encoder).writeInt(((Integer) data.get(978)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(979)));
+        (encoder).writeInt(((Integer) data.get(980)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(981)));
+        (encoder).writeInt(((Integer) data.get(982)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(983)));
+        (encoder).writeInt(((Integer) data.get(984)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(985)));
+        (encoder).writeInt(((Integer) data.get(986)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(987)));
+        (encoder).writeInt(((Integer) data.get(988)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(989)));
+        (encoder).writeInt(((Integer) data.get(990)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(991)));
+        (encoder).writeInt(((Integer) data.get(992)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(993)));
+        (encoder).writeInt(((Integer) data.get(994)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(995)));
+        (encoder).writeInt(((Integer) data.get(996)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(997)));
+        (encoder).writeInt(((Integer) data.get(998)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(999)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
new file mode 100644
index 000000000..4bba3d0c4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
@@ -0,0 +1,116 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericEnumSymbol testEnumUnion0 = ((GenericEnumSymbol) data.get(1));
+        if (testEnumUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testEnumUnion0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) testEnumUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                int valueToWrite1;
+                Object enumValue1 = testEnumUnion0;
+                if (enumValue1 instanceof Enum) {
+                    valueToWrite1 = ((Enum) enumValue1).ordinal();
+                } else {
+                    valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                }
+                (encoder).writeEnum(valueToWrite1);
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray0 = ((List<GenericEnumSymbol> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testEnumArray0 == null)||testEnumArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumArray0 .size());
+            for (int counter0 = 0; (counter0 <testEnumArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                int valueToWrite2;
+                Object enumValue2 = testEnumArray0 .get(counter0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray0 = ((List<GenericEnumSymbol> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testEnumUnionArray0 == null)||testEnumUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testEnumUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericEnumSymbol union0 = null;
+                union0 = ((List<GenericEnumSymbol> ) testEnumUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        int valueToWrite3;
+                        Object enumValue3 = union0;
+                        if (enumValue3 instanceof Enum) {
+                            valueToWrite3 = ((Enum) enumValue3).ordinal();
+                        } else {
+                            valueToWrite3 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite3);
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
new file mode 100644
index 000000000..fbf0fc85b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
@@ -0,0 +1,88 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericFixed testFixedUnion0 = ((GenericFixed) data.get(1));
+        if (testFixedUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testFixedUnion0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) testFixedUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                (encoder).writeFixed(((GenericFixed) testFixedUnion0).bytes());
+            }
+        }
+        List<GenericFixed> testFixedArray0 = ((List<GenericFixed> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testFixedArray0 == null)||testFixedArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedArray0 .size());
+            for (int counter0 = 0; (counter0 <testFixedArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeFixed(((GenericFixed) testFixedArray0 .get(counter0)).bytes());
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = ((List<GenericFixed> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testFixedUnionArray0 == null)||testFixedUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testFixedUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericFixed union0 = null;
+                union0 = ((List<GenericFixed> ) testFixedUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeFixed(((GenericFixed) union0).bytes());
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
new file mode 100644
index 000000000..b03f954b2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
@@ -0,0 +1,70 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union0 = ((Object) data.get(0));
+        if (union0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+            } else {
+                if (union0 instanceof CharSequence) {
+                    (encoder).writeIndex(2);
+                    if (((CharSequence) union0) instanceof Utf8) {
+                        (encoder).writeString(((Utf8)((CharSequence) union0)));
+                    } else {
+                        (encoder).writeString(((CharSequence) union0).toString());
+                    }
+                } else {
+                    if (union0 instanceof Integer) {
+                        (encoder).writeIndex(3);
+                        (encoder).writeInt(((Integer) union0));
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
new file mode 100644
index 000000000..7d1c06f6c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
@@ -0,0 +1,157 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Integer testIntUnion0 = ((Integer) data.get(1));
+        if (testIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeInt(((Integer) testIntUnion0));
+        }
+        Integer testFlippedIntUnion0 = ((Integer) data.get(2));
+        if (testFlippedIntUnion0 == null) {
+            (encoder).writeIndex(1);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(0);
+            (encoder).writeInt(((Integer) testFlippedIntUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        CharSequence testStringUnion0 = ((CharSequence) data.get(4));
+        if (testStringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testStringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testStringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) testStringUnion0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(5)));
+        Long testLongUnion0 = ((Long) data.get(6));
+        if (testLongUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) testLongUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeDouble(((Double) data.get(7)));
+        Double testDoubleUnion0 = ((Double) data.get(8));
+        if (testDoubleUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeDouble(((Double) testDoubleUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFloat(((Float) data.get(9)));
+        Float testFloatUnion0 = ((Float) data.get(10));
+        if (testFloatUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeFloat(((Float) testFloatUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBoolean(((Boolean) data.get(11)));
+        Boolean testBooleanUnion0 = ((Boolean) data.get(12));
+        if (testBooleanUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBoolean(((Boolean) testBooleanUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBytes(((ByteBuffer) data.get(13)));
+        ByteBuffer testBytesUnion0 = ((ByteBuffer) data.get(14));
+        if (testBytesUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBytes(((ByteBuffer) testBytesUnion0));
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
new file mode 100644
index 000000000..dd4264616
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union_field0 = ((Object) data.get(0));
+        if (union_field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record1".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeRecord10(((IndexedRecord) union_field0), (encoder), (customization));
+            } else {
+                if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                    (encoder).writeIndex(2);
+                    serializeRecord20(((IndexedRecord) union_field0), (encoder), (customization));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
new file mode 100644
index 000000000..f15d4ab0c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> recordsArray0 = ((List<IndexedRecord> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArray0 == null)||recordsArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArray0 .size());
+            for (int counter0 = 0; (counter0 <recordsArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord subRecord0 = null;
+                subRecord0 = ((List<IndexedRecord> ) recordsArray0).get(counter0);
+                serializeSubRecord0(subRecord0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMap0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMap0 == null)||recordsMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) recordsMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord subRecord1 = null;
+                subRecord1 = ((Map<CharSequence, IndexedRecord> ) recordsMap0).get(key0);
+                serializeSubRecord0(subRecord1, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+        List<IndexedRecord> recordsArrayUnion0 = ((List<IndexedRecord> ) data.get(2));
+        if (recordsArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<IndexedRecord> ) recordsArrayUnion0) == null)||((List<IndexedRecord> ) recordsArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<IndexedRecord> ) recordsArrayUnion0).size());
+                    for (int counter1 = 0; (counter1 <((List<IndexedRecord> ) recordsArrayUnion0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union0 = null;
+                        union0 = ((List<IndexedRecord> )((List<IndexedRecord> ) recordsArrayUnion0)).get(counter1);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMapUnion0 = ((Map<CharSequence, IndexedRecord> ) data.get(3));
+        if (recordsMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, IndexedRecord> ) recordsMapUnion0) == null)||((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).size());
+                    for (CharSequence key1 : ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key1);
+                        IndexedRecord union1 = null;
+                        union1 = ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).get(key1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
new file mode 100644
index 000000000..181f90dd5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
@@ -0,0 +1,230 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMap0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArrayMap0 == null)||recordsArrayMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArrayMap0 .size());
+            for (int counter0 = 0; (counter0 <recordsArrayMap0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Map<CharSequence, IndexedRecord> map0 = null;
+                map0 = ((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMap0).get(counter0);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(map0);
+                }
+                (encoder).writeMapStart();
+                if ((map0 == null)||map0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(map0 .size());
+                    for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) map0).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        IndexedRecord union0 = null;
+                        union0 = ((Map<CharSequence, IndexedRecord> ) map0).get(key0);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMapArray0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMapArray0 == null)||recordsMapArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMapArray0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                List<IndexedRecord> array0 = null;
+                array0 = ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).get(key1);
+                (encoder).writeArrayStart();
+                if ((array0 == null)||array0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(array0 .size());
+                    for (int counter1 = 0; (counter1 <array0 .size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union1 = null;
+                        union1 = ((List<IndexedRecord> ) array0).get(counter1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        (encoder).writeMapEnd();
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMapUnion0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(2));
+        if (recordsArrayMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayMapUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0) == null)||((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size());
+                    for (int counter2 = 0; (counter2 <((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size()); counter2 ++) {
+                        (encoder).startItem();
+                        Map<CharSequence, IndexedRecord> map1 = null;
+                        map1 = ((List<Map<CharSequence, IndexedRecord>> )((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0)).get(counter2);
+                        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                            (customization).getCheckMapTypeFunction().apply(map1);
+                        }
+                        (encoder).writeMapStart();
+                        if ((map1 == null)||map1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(map1 .size());
+                            for (CharSequence key2 : ((Map<CharSequence, IndexedRecord> ) map1).keySet()) {
+                                (encoder).startItem();
+                                (encoder).writeString(key2);
+                                IndexedRecord union2 = null;
+                                union2 = ((Map<CharSequence, IndexedRecord> ) map1).get(key2);
+                                if (union2 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union2 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union2).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union2), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeMapEnd();
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArrayUnion0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(3));
+        if (recordsMapArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapArrayUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0) == null)||((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).size());
+                    for (CharSequence key3 : ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key3);
+                        List<IndexedRecord> array1 = null;
+                        array1 = ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).get(key3);
+                        (encoder).writeArrayStart();
+                        if ((array1 == null)||array1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(array1 .size());
+                            for (int counter3 = 0; (counter3 <array1 .size()); counter3 ++) {
+                                (encoder).startItem();
+                                IndexedRecord union3 = null;
+                                union3 = ((List<IndexedRecord> ) array1).get(counter3);
+                                if (union3 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union3 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union3).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union3), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeArrayEnd();
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
new file mode 100644
index 000000000..0b99918cf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record0 = ((IndexedRecord) data.get(0));
+        if (record0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((record0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) record0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) record0), (encoder), (customization));
+            }
+        }
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record10 = ((IndexedRecord) data.get(1));
+        serializeSubRecord0(record10, (encoder), (customization));
+        CharSequence field0 = ((CharSequence) data.get(2));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeEnums_GenericSerializer_957378572.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeEnums_GenericSerializer_957378572.java
new file mode 100644
index 000000000..a706cb4aa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeEnums_GenericSerializer_957378572.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeEnums_GenericSerializer_957378572
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> arrayOfEnums0 = ((List<GenericEnumSymbol> ) data.get(1));
+        if (arrayOfEnums0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfEnums0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericEnumSymbol> ) arrayOfEnums0) == null)||((List<GenericEnumSymbol> ) arrayOfEnums0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericEnumSymbol> ) arrayOfEnums0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericEnumSymbol> ) arrayOfEnums0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        int valueToWrite1;
+                        Object enumValue1 = ((List<GenericEnumSymbol> ) arrayOfEnums0).get(counter0);
+                        if (enumValue1 instanceof Enum) {
+                            valueToWrite1 = ((Enum) enumValue1).ordinal();
+                        } else {
+                            valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite1);
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericEnumSymbol> mapOfEnums0 = ((Map<CharSequence, GenericEnumSymbol> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfEnums0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfEnums0 == null)||mapOfEnums0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfEnums0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericEnumSymbol> ) mapOfEnums0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                int valueToWrite2;
+                Object enumValue2 = mapOfEnums0 .get(key0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeFixed_GenericSerializer_504108934.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeFixed_GenericSerializer_504108934.java
new file mode 100644
index 000000000..225d212cf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeFixed_GenericSerializer_504108934.java
@@ -0,0 +1,74 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeFixed_GenericSerializer_504108934
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> arrayOfFixed0 = ((List<GenericFixed> ) data.get(1));
+        if (arrayOfFixed0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfFixed0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericFixed> ) arrayOfFixed0) == null)||((List<GenericFixed> ) arrayOfFixed0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericFixed> ) arrayOfFixed0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericFixed> ) arrayOfFixed0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFixed(((GenericFixed)((List<GenericFixed> ) arrayOfFixed0).get(counter0)).bytes());
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericFixed> mapOfFixed0 = ((Map<CharSequence, GenericFixed> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfFixed0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfFixed0 == null)||mapOfFixed0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfFixed0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericFixed> ) mapOfFixed0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                (encoder).writeFixed(((GenericFixed) mapOfFixed0 .get(key0)).bytes());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java
new file mode 100644
index 000000000..71d0c0c52
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeLogicalTypesDefined_GenericSerializer_229156053
+    implements FastSerializer<IndexedRecord>
+{
+
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesDefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue0 = data.get(0);
+        convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+        (encoder).writeInt(((Integer) convertedValue0));
+        serialize_FastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesDefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue1 = data.get(1);
+        convertedValue1 = Conversions.convertToRawType(convertedValue1, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+        (encoder).writeInt(((Integer) convertedValue1));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = ((List<Object> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((arrayOfUnionOfDateAndTimestampMillis0 == null)||arrayOfUnionOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfUnionOfDateAndTimestampMillis0 .size());
+            for (int counter0 = 0; (counter0 <arrayOfUnionOfDateAndTimestampMillis0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Object union0 = null;
+                union0 = ((List<Object> ) arrayOfUnionOfDateAndTimestampMillis0).get(counter0);
+                if (union0 instanceof LocalDate) {
+                    (encoder).writeIndex(0);
+                    Object convertedValue2 = union0;
+                    convertedValue2 = Conversions.convertToRawType(convertedValue2, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue2));
+                } else {
+                    if (union0 instanceof Instant) {
+                        (encoder).writeIndex(1);
+                        Object convertedValue3 = union0;
+                        convertedValue3 = Conversions.convertToRawType(convertedValue3, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                        (encoder).writeLong(((Long) convertedValue3));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java
new file mode 100644
index 000000000..e1ec41f75
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeLogicalTypesDefined_SpecificSerializer_229156053
+    implements FastSerializer<FastSerdeLogicalTypesDefined>
+{
+
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+
+    public void serialize(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesDefined0(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue0 = data.get(0);
+        convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+        (encoder).writeInt(((Integer) convertedValue0));
+        serialize_FastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesDefined0(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue1 = data.get(1);
+        convertedValue1 = Conversions.convertToRawType(convertedValue1, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+        (encoder).writeInt(((Integer) convertedValue1));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = ((List<Object> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((arrayOfUnionOfDateAndTimestampMillis0 == null)||arrayOfUnionOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfUnionOfDateAndTimestampMillis0 .size());
+            for (int counter0 = 0; (counter0 <arrayOfUnionOfDateAndTimestampMillis0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Object union0 = null;
+                union0 = ((List<Object> ) arrayOfUnionOfDateAndTimestampMillis0).get(counter0);
+                if (union0 instanceof LocalDate) {
+                    (encoder).writeIndex(0);
+                    Object convertedValue2 = union0;
+                    convertedValue2 = Conversions.convertToRawType(convertedValue2, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue2));
+                } else {
+                    if (union0 instanceof Instant) {
+                        (encoder).writeIndex(1);
+                        Object convertedValue3 = union0;
+                        convertedValue3 = Conversions.convertToRawType(convertedValue3, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                        (encoder).writeLong(((Long) convertedValue3));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java
new file mode 100644
index 000000000..fcacac81a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java
@@ -0,0 +1,352 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastSerdeLogicalTypesTest1_GenericSerializer_1007574890
+    implements FastSerializer<IndexedRecord>
+{
+
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.LocalTimestampMillisConversion conversion_local_timestamp_millis = new org.apache.avro.data.TimeConversions.LocalTimestampMillisConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+    private final Schema logicalTypeSchema_120893213 = Schema.parse("{\"type\":\"bytes\",\"logicalType\":\"decimal\",\"precision\":4,\"scale\":2}");
+    private final Schema logicalTypeSchema__1252781617 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-micros\"}");
+    private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
+    private final Schema logicalTypeSchema__250645780 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"local-timestamp-millis\"}");
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesTest10(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesTest10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfArrayAndMap0 = ((Object) data.get(0));
+        if (unionOfArrayAndMap0 instanceof List) {
+            (encoder).writeIndex(0);
+            (encoder).writeArrayStart();
+            if ((((List<LocalTime> ) unionOfArrayAndMap0) == null)||((List<LocalTime> ) unionOfArrayAndMap0).isEmpty()) {
+                (encoder).setItemCount(0);
+            } else {
+                (encoder).setItemCount(((List<LocalTime> ) unionOfArrayAndMap0).size());
+                Object array0 = ((List<LocalTime> ) unionOfArrayAndMap0);
+                if (array0 instanceof PrimitiveIntList) {
+                    PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        Object convertedValue0 = primitiveList0 .getPrimitive(counter0);
+                        convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+                        (encoder).writeInt(((Integer) convertedValue0));
+                    }
+                } else {
+                    for (int counter1 = 0; (counter1 <((List<LocalTime> ) unionOfArrayAndMap0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        Object convertedValue1 = ((List<LocalTime> ) unionOfArrayAndMap0).get(counter1);
+                        convertedValue1 = Conversions.convertToRawType(convertedValue1, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+                        (encoder).writeInt(((Integer) convertedValue1));
+                    }
+                }
+            }
+            (encoder).writeArrayEnd();
+        } else {
+            if (unionOfArrayAndMap0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0) == null)||((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).size());
+                    for (CharSequence key0 : ((Map<CharSequence, LocalDate> )((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        Object convertedValue2 = ((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).get(key0);
+                        convertedValue2 = Conversions.convertToRawType(convertedValue2, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                        (encoder).writeInt(((Integer) convertedValue2));
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        serialize_FastSerdeLogicalTypesTest10(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest11(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest12(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest13(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest14(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest15(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, Object> mapOfUnionsOfDateAndTimestampMillis0 = ((Map<CharSequence, Object> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfUnionsOfDateAndTimestampMillis0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfUnionsOfDateAndTimestampMillis0 == null)||mapOfUnionsOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfUnionsOfDateAndTimestampMillis0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, Object> ) mapOfUnionsOfDateAndTimestampMillis0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                Object union0 = null;
+                union0 = ((Map<CharSequence, Object> ) mapOfUnionsOfDateAndTimestampMillis0).get(key1);
+                if (union0 instanceof LocalDate) {
+                    (encoder).writeIndex(0);
+                    Object convertedValue3 = union0;
+                    convertedValue3 = Conversions.convertToRawType(convertedValue3, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue3));
+                } else {
+                    if (union0 instanceof Instant) {
+                        (encoder).writeIndex(1);
+                        Object convertedValue4 = union0;
+                        convertedValue4 = Conversions.convertToRawType(convertedValue4, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                        (encoder).writeLong(((Long) convertedValue4));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+        Map<CharSequence, Instant> timestampMillisMap0 = ((Map<CharSequence, Instant> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(timestampMillisMap0);
+        }
+        (encoder).writeMapStart();
+        if ((timestampMillisMap0 == null)||timestampMillisMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(timestampMillisMap0 .size());
+            for (CharSequence key2 : ((Map<CharSequence, Instant> ) timestampMillisMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key2);
+                Object convertedValue5 = timestampMillisMap0 .get(key2);
+                convertedValue5 = Conversions.convertToRawType(convertedValue5, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                (encoder).writeLong(((Long) convertedValue5));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<LocalDate> nullableArrayOfDates0 = ((List<LocalDate> ) data.get(3));
+        if (nullableArrayOfDates0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullableArrayOfDates0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<LocalDate> ) nullableArrayOfDates0) == null)||((List<LocalDate> ) nullableArrayOfDates0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<LocalDate> ) nullableArrayOfDates0).size());
+                    Object array1 = ((List<LocalDate> ) nullableArrayOfDates0);
+                    if (array1 instanceof PrimitiveIntList) {
+                        PrimitiveIntList primitiveList1 = ((PrimitiveIntList) array1);
+                        for (int counter2 = 0; (counter2 <primitiveList1 .size()); counter2 ++) {
+                            (encoder).startItem();
+                            Object convertedValue6 = primitiveList1 .getPrimitive(counter2);
+                            convertedValue6 = Conversions.convertToRawType(convertedValue6, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                            (encoder).writeInt(((Integer) convertedValue6));
+                        }
+                    } else {
+                        for (int counter3 = 0; (counter3 <((List<LocalDate> ) nullableArrayOfDates0).size()); counter3 ++) {
+                            (encoder).startItem();
+                            Object convertedValue7 = ((List<LocalDate> ) nullableArrayOfDates0).get(counter3);
+                            convertedValue7 = Conversions.convertToRawType(convertedValue7, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                            (encoder).writeInt(((Integer) convertedValue7));
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        List<LocalDate> arrayOfDates0 = ((List<LocalDate> ) data.get(4));
+        (encoder).writeArrayStart();
+        if ((arrayOfDates0 == null)||arrayOfDates0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfDates0 .size());
+            Object array2 = arrayOfDates0;
+            if (array2 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList2 = ((PrimitiveIntList) array2);
+                for (int counter4 = 0; (counter4 <primitiveList2 .size()); counter4 ++) {
+                    (encoder).startItem();
+                    Object convertedValue8 = primitiveList2 .getPrimitive(counter4);
+                    convertedValue8 = Conversions.convertToRawType(convertedValue8, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue8));
+                }
+            } else {
+                for (int counter5 = 0; (counter5 <arrayOfDates0 .size()); counter5 ++) {
+                    (encoder).startItem();
+                    Object convertedValue9 = arrayOfDates0 .get(counter5);
+                    convertedValue9 = Conversions.convertToRawType(convertedValue9, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue9));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfDecimalOrDate0 = ((Object) data.get(5));
+        if (unionOfDecimalOrDate0 instanceof BigDecimal) {
+            (encoder).writeIndex(0);
+            Object convertedValue10 = unionOfDecimalOrDate0;
+            convertedValue10 = Conversions.convertToRawType(convertedValue10, this.logicalTypeSchema_120893213, this.logicalTypeSchema_120893213 .getLogicalType(), this.conversion_decimal);
+            (encoder).writeBytes(((ByteBuffer) convertedValue10));
+        } else {
+            if (unionOfDecimalOrDate0 instanceof LocalDate) {
+                (encoder).writeIndex(1);
+                Object convertedValue11 = unionOfDecimalOrDate0;
+                convertedValue11 = Conversions.convertToRawType(convertedValue11, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                (encoder).writeInt(((Integer) convertedValue11));
+            }
+        }
+        if (((CharSequence) data.get(6)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(6))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(6)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue12 = data.get(7);
+        convertedValue12 = Conversions.convertToRawType(convertedValue12, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+        (encoder).writeLong(((Long) convertedValue12));
+        Object convertedValue13 = data.get(8);
+        convertedValue13 = Conversions.convertToRawType(convertedValue13, this.logicalTypeSchema__1252781617, this.logicalTypeSchema__1252781617 .getLogicalType(), this.conversion_timestamp_micros);
+        (encoder).writeLong(((Long) convertedValue13));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue14 = data.get(9);
+        convertedValue14 = Conversions.convertToRawType(convertedValue14, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+        (encoder).writeInt(((Integer) convertedValue14));
+        Object convertedValue15 = data.get(10);
+        convertedValue15 = Conversions.convertToRawType(convertedValue15, this.logicalTypeSchema__1515894331, this.logicalTypeSchema__1515894331 .getLogicalType(), this.conversion_time_micros);
+        (encoder).writeLong(((Long) convertedValue15));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue16 = data.get(11);
+        convertedValue16 = Conversions.convertToRawType(convertedValue16, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+        (encoder).writeInt(((Integer) convertedValue16));
+        IndexedRecord nestedLocalTimestampMillis0 = ((IndexedRecord) data.get(12));
+        serializeLocalTimestampRecord0(nestedLocalTimestampMillis0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeLocalTimestampRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue17 = data.get(0);
+        convertedValue17 = Conversions.convertToRawType(convertedValue17, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
+        (encoder).writeLong(((Long) convertedValue17));
+        serialize_LocalTimestampRecord0(data, (encoder), (customization));
+        serialize_LocalTimestampRecord1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        LocalDateTime nullableNestedTimestamp0 = ((LocalDateTime) data.get(1));
+        if (nullableNestedTimestamp0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            Object convertedValue18 = nullableNestedTimestamp0;
+            convertedValue18 = Conversions.convertToRawType(convertedValue18, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
+            (encoder).writeLong(((Long) convertedValue18));
+        }
+        Object nullableUnionOfDateAndLocalTimestamp0 = ((Object) data.get(2));
+        if (nullableUnionOfDateAndLocalTimestamp0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullableUnionOfDateAndLocalTimestamp0 instanceof LocalDate) {
+                (encoder).writeIndex(1);
+                Object convertedValue19 = nullableUnionOfDateAndLocalTimestamp0;
+                convertedValue19 = Conversions.convertToRawType(convertedValue19, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                (encoder).writeInt(((Integer) convertedValue19));
+            } else {
+                if (nullableUnionOfDateAndLocalTimestamp0 instanceof LocalDateTime) {
+                    (encoder).writeIndex(2);
+                    Object convertedValue20 = nullableUnionOfDateAndLocalTimestamp0;
+                    convertedValue20 = Conversions.convertToRawType(convertedValue20, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
+                    (encoder).writeLong(((Long) convertedValue20));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfDateAndLocalTimestamp0 = ((Object) data.get(3));
+        if (unionOfDateAndLocalTimestamp0 instanceof LocalDate) {
+            (encoder).writeIndex(0);
+            Object convertedValue21 = unionOfDateAndLocalTimestamp0;
+            convertedValue21 = Conversions.convertToRawType(convertedValue21, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+            (encoder).writeInt(((Integer) convertedValue21));
+        } else {
+            if (unionOfDateAndLocalTimestamp0 instanceof LocalDateTime) {
+                (encoder).writeIndex(1);
+                Object convertedValue22 = unionOfDateAndLocalTimestamp0;
+                convertedValue22 = Conversions.convertToRawType(convertedValue22, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
+                (encoder).writeLong(((Long) convertedValue22));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java
new file mode 100644
index 000000000..e3b649895
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java
@@ -0,0 +1,353 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1;
+import com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890
+    implements FastSerializer<FastSerdeLogicalTypesTest1>
+{
+
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.LocalTimestampMillisConversion conversion_local_timestamp_millis = new org.apache.avro.data.TimeConversions.LocalTimestampMillisConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+    private final Schema logicalTypeSchema_120893213 = Schema.parse("{\"type\":\"bytes\",\"logicalType\":\"decimal\",\"precision\":4,\"scale\":2}");
+    private final Schema logicalTypeSchema__1252781617 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-micros\"}");
+    private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
+    private final Schema logicalTypeSchema__250645780 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"local-timestamp-millis\"}");
+
+    public void serialize(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesTest10(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfArrayAndMap0 = ((Object) data.get(0));
+        if (unionOfArrayAndMap0 instanceof List) {
+            (encoder).writeIndex(0);
+            (encoder).writeArrayStart();
+            if ((((List<LocalTime> ) unionOfArrayAndMap0) == null)||((List<LocalTime> ) unionOfArrayAndMap0).isEmpty()) {
+                (encoder).setItemCount(0);
+            } else {
+                (encoder).setItemCount(((List<LocalTime> ) unionOfArrayAndMap0).size());
+                Object array0 = ((List<LocalTime> ) unionOfArrayAndMap0);
+                if (array0 instanceof PrimitiveIntList) {
+                    PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        Object convertedValue0 = primitiveList0 .getPrimitive(counter0);
+                        convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+                        (encoder).writeInt(((Integer) convertedValue0));
+                    }
+                } else {
+                    for (int counter1 = 0; (counter1 <((List<LocalTime> ) unionOfArrayAndMap0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        Object convertedValue1 = ((List<LocalTime> ) unionOfArrayAndMap0).get(counter1);
+                        convertedValue1 = Conversions.convertToRawType(convertedValue1, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+                        (encoder).writeInt(((Integer) convertedValue1));
+                    }
+                }
+            }
+            (encoder).writeArrayEnd();
+        } else {
+            if (unionOfArrayAndMap0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0) == null)||((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).size());
+                    for (CharSequence key0 : ((Map<CharSequence, LocalDate> )((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        Object convertedValue2 = ((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).get(key0);
+                        convertedValue2 = Conversions.convertToRawType(convertedValue2, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                        (encoder).writeInt(((Integer) convertedValue2));
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        serialize_FastSerdeLogicalTypesTest10(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest11(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest12(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest13(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest14(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest15(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, Object> mapOfUnionsOfDateAndTimestampMillis0 = ((Map<CharSequence, Object> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfUnionsOfDateAndTimestampMillis0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfUnionsOfDateAndTimestampMillis0 == null)||mapOfUnionsOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfUnionsOfDateAndTimestampMillis0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, Object> ) mapOfUnionsOfDateAndTimestampMillis0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                Object union0 = null;
+                union0 = ((Map<CharSequence, Object> ) mapOfUnionsOfDateAndTimestampMillis0).get(key1);
+                if (union0 instanceof LocalDate) {
+                    (encoder).writeIndex(0);
+                    Object convertedValue3 = union0;
+                    convertedValue3 = Conversions.convertToRawType(convertedValue3, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue3));
+                } else {
+                    if (union0 instanceof Instant) {
+                        (encoder).writeIndex(1);
+                        Object convertedValue4 = union0;
+                        convertedValue4 = Conversions.convertToRawType(convertedValue4, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                        (encoder).writeLong(((Long) convertedValue4));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+        Map<CharSequence, Instant> timestampMillisMap0 = ((Map<CharSequence, Instant> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(timestampMillisMap0);
+        }
+        (encoder).writeMapStart();
+        if ((timestampMillisMap0 == null)||timestampMillisMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(timestampMillisMap0 .size());
+            for (CharSequence key2 : ((Map<CharSequence, Instant> ) timestampMillisMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key2);
+                Object convertedValue5 = timestampMillisMap0 .get(key2);
+                convertedValue5 = Conversions.convertToRawType(convertedValue5, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                (encoder).writeLong(((Long) convertedValue5));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest11(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<LocalDate> nullableArrayOfDates0 = ((List<LocalDate> ) data.get(3));
+        if (nullableArrayOfDates0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullableArrayOfDates0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<LocalDate> ) nullableArrayOfDates0) == null)||((List<LocalDate> ) nullableArrayOfDates0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<LocalDate> ) nullableArrayOfDates0).size());
+                    Object array1 = ((List<LocalDate> ) nullableArrayOfDates0);
+                    if (array1 instanceof PrimitiveIntList) {
+                        PrimitiveIntList primitiveList1 = ((PrimitiveIntList) array1);
+                        for (int counter2 = 0; (counter2 <primitiveList1 .size()); counter2 ++) {
+                            (encoder).startItem();
+                            Object convertedValue6 = primitiveList1 .getPrimitive(counter2);
+                            convertedValue6 = Conversions.convertToRawType(convertedValue6, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                            (encoder).writeInt(((Integer) convertedValue6));
+                        }
+                    } else {
+                        for (int counter3 = 0; (counter3 <((List<LocalDate> ) nullableArrayOfDates0).size()); counter3 ++) {
+                            (encoder).startItem();
+                            Object convertedValue7 = ((List<LocalDate> ) nullableArrayOfDates0).get(counter3);
+                            convertedValue7 = Conversions.convertToRawType(convertedValue7, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                            (encoder).writeInt(((Integer) convertedValue7));
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        List<LocalDate> arrayOfDates0 = ((List<LocalDate> ) data.get(4));
+        (encoder).writeArrayStart();
+        if ((arrayOfDates0 == null)||arrayOfDates0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfDates0 .size());
+            Object array2 = arrayOfDates0;
+            if (array2 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList2 = ((PrimitiveIntList) array2);
+                for (int counter4 = 0; (counter4 <primitiveList2 .size()); counter4 ++) {
+                    (encoder).startItem();
+                    Object convertedValue8 = primitiveList2 .getPrimitive(counter4);
+                    convertedValue8 = Conversions.convertToRawType(convertedValue8, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue8));
+                }
+            } else {
+                for (int counter5 = 0; (counter5 <arrayOfDates0 .size()); counter5 ++) {
+                    (encoder).startItem();
+                    Object convertedValue9 = arrayOfDates0 .get(counter5);
+                    convertedValue9 = Conversions.convertToRawType(convertedValue9, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue9));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest12(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfDecimalOrDate0 = ((Object) data.get(5));
+        if (unionOfDecimalOrDate0 instanceof BigDecimal) {
+            (encoder).writeIndex(0);
+            Object convertedValue10 = unionOfDecimalOrDate0;
+            convertedValue10 = Conversions.convertToRawType(convertedValue10, this.logicalTypeSchema_120893213, this.logicalTypeSchema_120893213 .getLogicalType(), this.conversion_decimal);
+            (encoder).writeBytes(((ByteBuffer) convertedValue10));
+        } else {
+            if (unionOfDecimalOrDate0 instanceof LocalDate) {
+                (encoder).writeIndex(1);
+                Object convertedValue11 = unionOfDecimalOrDate0;
+                convertedValue11 = Conversions.convertToRawType(convertedValue11, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                (encoder).writeInt(((Integer) convertedValue11));
+            }
+        }
+        if (((CharSequence) data.get(6)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(6))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(6)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest13(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue12 = data.get(7);
+        convertedValue12 = Conversions.convertToRawType(convertedValue12, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+        (encoder).writeLong(((Long) convertedValue12));
+        Object convertedValue13 = data.get(8);
+        convertedValue13 = Conversions.convertToRawType(convertedValue13, this.logicalTypeSchema__1252781617, this.logicalTypeSchema__1252781617 .getLogicalType(), this.conversion_timestamp_micros);
+        (encoder).writeLong(((Long) convertedValue13));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest14(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue14 = data.get(9);
+        convertedValue14 = Conversions.convertToRawType(convertedValue14, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+        (encoder).writeInt(((Integer) convertedValue14));
+        Object convertedValue15 = data.get(10);
+        convertedValue15 = Conversions.convertToRawType(convertedValue15, this.logicalTypeSchema__1515894331, this.logicalTypeSchema__1515894331 .getLogicalType(), this.conversion_time_micros);
+        (encoder).writeLong(((Long) convertedValue15));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest15(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue16 = data.get(11);
+        convertedValue16 = Conversions.convertToRawType(convertedValue16, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+        (encoder).writeInt(((Integer) convertedValue16));
+        LocalTimestampRecord nestedLocalTimestampMillis0 = ((LocalTimestampRecord) data.get(12));
+        serializeLocalTimestampRecord0(nestedLocalTimestampMillis0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeLocalTimestampRecord0(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue17 = data.get(0);
+        convertedValue17 = Conversions.convertToRawType(convertedValue17, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
+        (encoder).writeLong(((Long) convertedValue17));
+        serialize_LocalTimestampRecord0(data, (encoder), (customization));
+        serialize_LocalTimestampRecord1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord0(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        LocalDateTime nullableNestedTimestamp0 = ((LocalDateTime) data.get(1));
+        if (nullableNestedTimestamp0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            Object convertedValue18 = nullableNestedTimestamp0;
+            convertedValue18 = Conversions.convertToRawType(convertedValue18, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
+            (encoder).writeLong(((Long) convertedValue18));
+        }
+        Object nullableUnionOfDateAndLocalTimestamp0 = ((Object) data.get(2));
+        if (nullableUnionOfDateAndLocalTimestamp0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullableUnionOfDateAndLocalTimestamp0 instanceof LocalDate) {
+                (encoder).writeIndex(1);
+                Object convertedValue19 = nullableUnionOfDateAndLocalTimestamp0;
+                convertedValue19 = Conversions.convertToRawType(convertedValue19, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                (encoder).writeInt(((Integer) convertedValue19));
+            } else {
+                if (nullableUnionOfDateAndLocalTimestamp0 instanceof LocalDateTime) {
+                    (encoder).writeIndex(2);
+                    Object convertedValue20 = nullableUnionOfDateAndLocalTimestamp0;
+                    convertedValue20 = Conversions.convertToRawType(convertedValue20, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
+                    (encoder).writeLong(((Long) convertedValue20));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord1(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfDateAndLocalTimestamp0 = ((Object) data.get(3));
+        if (unionOfDateAndLocalTimestamp0 instanceof LocalDate) {
+            (encoder).writeIndex(0);
+            Object convertedValue21 = unionOfDateAndLocalTimestamp0;
+            convertedValue21 = Conversions.convertToRawType(convertedValue21, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+            (encoder).writeInt(((Integer) convertedValue21));
+        } else {
+            if (unionOfDateAndLocalTimestamp0 instanceof LocalDateTime) {
+                (encoder).writeIndex(1);
+                Object convertedValue22 = unionOfDateAndLocalTimestamp0;
+                convertedValue22 = Conversions.convertToRawType(convertedValue22, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
+                (encoder).writeLong(((Long) convertedValue22));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java
new file mode 100644
index 000000000..27ccf9235
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java
@@ -0,0 +1,59 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesUndefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesUndefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = ((List<Object> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((arrayOfUnionOfDateAndTimestampMillis0 == null)||arrayOfUnionOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfUnionOfDateAndTimestampMillis0 .size());
+            for (int counter0 = 0; (counter0 <arrayOfUnionOfDateAndTimestampMillis0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Object union0 = null;
+                union0 = ((List<Object> ) arrayOfUnionOfDateAndTimestampMillis0).get(counter0);
+                if (union0 instanceof Integer) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeInt(((Integer) union0));
+                } else {
+                    if (union0 instanceof Long) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeLong(((Long) union0));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java
new file mode 100644
index 000000000..ef61b2b5f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java
@@ -0,0 +1,59 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418
+    implements FastSerializer<FastSerdeLogicalTypesUndefined>
+{
+
+
+    public void serialize(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesUndefined0(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesUndefined0(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = ((List<Object> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((arrayOfUnionOfDateAndTimestampMillis0 == null)||arrayOfUnionOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfUnionOfDateAndTimestampMillis0 .size());
+            for (int counter0 = 0; (counter0 <arrayOfUnionOfDateAndTimestampMillis0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Object union0 = null;
+                union0 = ((List<Object> ) arrayOfUnionOfDateAndTimestampMillis0).get(counter0);
+                if (union0 instanceof Integer) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeInt(((Integer) union0));
+                } else {
+                    if (union0 instanceof Long) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeLong(((Long) union0));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
new file mode 100644
index 000000000..5021c048b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
new file mode 100644
index 000000000..d09ebd0aa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Map_of_UNION_GenericSerializer_2140000109.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Map_of_UNION_GenericSerializer_2140000109.java
new file mode 100644
index 000000000..22caec46c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Map_of_UNION_GenericSerializer_2140000109.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericSerializer_2140000109
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord union0 = null;
+                union0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Map_of_record_GenericSerializer_1677529043.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Map_of_record_GenericSerializer_1677529043.java
new file mode 100644
index 000000000..5c9706891
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/Map_of_record_GenericSerializer_1677529043.java
@@ -0,0 +1,57 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericSerializer_1677529043
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord record0 = null;
+                record0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/StringableRecord_SpecificSerializer_842267318.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/StringableRecord_SpecificSerializer_842267318.java
new file mode 100644
index 000000000..7e2845f1f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/StringableRecord_SpecificSerializer_842267318.java
@@ -0,0 +1,159 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.URI;
+import java.net.URL;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableSubRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificSerializer_842267318
+    implements FastSerializer<StringableRecord>
+{
+
+
+    public void serialize(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeStringableRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigInteger) data.get(0)).toString());
+        serialize_StringableRecord0(data, (encoder), (customization));
+        serialize_StringableRecord1(data, (encoder), (customization));
+        serialize_StringableRecord2(data, (encoder), (customization));
+        serialize_StringableRecord3(data, (encoder), (customization));
+        serialize_StringableRecord4(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigDecimal) data.get(1)).toString());
+        (encoder).writeString(((URI) data.get(2)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord1(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URL) data.get(3)).toString());
+        (encoder).writeString(((File) data.get(4)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord2(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<URL> urlArray0 = ((List<URL> ) data.get(5));
+        (encoder).writeArrayStart();
+        if ((urlArray0 == null)||urlArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlArray0 .size());
+            for (int counter0 = 0; (counter0 <urlArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeString(urlArray0 .get(counter0).toString());
+            }
+        }
+        (encoder).writeArrayEnd();
+        Map<URL, BigInteger> urlMap0 = ((Map<URL, BigInteger> ) data.get(6));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(urlMap0);
+        }
+        (encoder).writeMapStart();
+        if ((urlMap0 == null)||urlMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlMap0 .size());
+            for (URL key0 : ((Map<URL, BigInteger> ) urlMap0).keySet()) {
+                (encoder).startItem();
+                String keyString0 = key0 .toString();
+                (encoder).writeString(keyString0);
+                (encoder).writeString(((BigInteger) urlMap0 .get(key0)).toString());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord3(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord0 = ((StringableSubRecord) data.get(7));
+        serializeStringableSubRecord0(subRecord0, (encoder), (customization));
+        AnotherSubRecord subRecordWithSubRecord0 = ((AnotherSubRecord) data.get(8));
+        serializeAnotherSubRecord0(subRecordWithSubRecord0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URI) data.get(0)).toString());
+        serialize_StringableSubRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object nullStringIntUnion0 = ((Object) data.get(1));
+        if (nullStringIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullStringIntUnion0 instanceof CharSequence) {
+                (encoder).writeIndex(1);
+                if (((CharSequence) nullStringIntUnion0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) nullStringIntUnion0)));
+                } else {
+                    (encoder).writeString(((CharSequence) nullStringIntUnion0).toString());
+                }
+            } else {
+                if (nullStringIntUnion0 instanceof Integer) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeInt(((Integer) nullStringIntUnion0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord1 = ((StringableSubRecord) data.get(0));
+        serializeStringableSubRecord0(subRecord1, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord4(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        String stringUnion0 = ((String) data.get(9));
+        if (stringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeString(((String) stringUnion0).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/TestArrayOfFloats_GenericSerializer_1408566797.java b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/TestArrayOfFloats_GenericSerializer_1408566797.java
new file mode 100644
index 000000000..1110f191c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests110/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_10/TestArrayOfFloats_GenericSerializer_1408566797.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_10;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class TestArrayOfFloats_GenericSerializer_1408566797
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeTestArrayOfFloats0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Float> array_of_float0 = ((List<Float> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((array_of_float0 == null)||array_of_float0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(array_of_float0 .size());
+            Object array0 = array_of_float0;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <array_of_float0 .size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(array_of_float0 .get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
index fc97e588d..ff9ab2b68 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import com.linkedin.avro.api.PrimitiveBooleanList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.io.Decoder;
@@ -19,7 +23,11 @@ public Array_of_BOOLEAN_GenericDeserializer_869749973_869749973(Schema readerSch
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder)
+=======
+    public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveBooleanList array0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
index 6b6aa1b22..7ee8b9e9f 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import com.linkedin.avro.api.PrimitiveDoubleList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.io.Decoder;
@@ -19,7 +23,11 @@ public Array_of_DOUBLE_GenericDeserializer_18760307_18760307(Schema readerSchema
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public List<Double> deserialize(List<Double> reuse, Decoder decoder)
+=======
+    public List<Double> deserialize(List<Double> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveDoubleList array0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
index ac047edbc..ed2fd4b04 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
@@ -6,6 +6,10 @@
 import com.linkedin.avro.api.PrimitiveFloatList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.io.Decoder;
 
@@ -19,7 +23,11 @@ public Array_of_FLOAT_GenericDeserializer_1012670397_1012670397(Schema readerSch
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public List<Float> deserialize(List<Float> reuse, Decoder decoder)
+=======
+    public List<Float> deserialize(List<Float> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveFloatList array0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_INT_GenericDeserializer_1012089072_1012089072.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
index 89a26b958..41506d776 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.io.Decoder;
@@ -19,7 +23,11 @@ public Array_of_INT_GenericDeserializer_1012089072_1012089072(Schema readerSchem
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public List<Integer> deserialize(List<Integer> reuse, Decoder decoder)
+=======
+    public List<Integer> deserialize(List<Integer> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveIntList array0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_LONG_GenericDeserializer_325099267_325099267.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_LONG_GenericDeserializer_325099267_325099267.java
index 957af2dac..186da0399 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_LONG_GenericDeserializer_325099267_325099267.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_LONG_GenericDeserializer_325099267_325099267.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import com.linkedin.avro.api.PrimitiveLongList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.io.Decoder;
@@ -19,7 +23,11 @@ public Array_of_LONG_GenericDeserializer_325099267_325099267(Schema readerSchema
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public List<Long> deserialize(List<Long> reuse, Decoder decoder)
+=======
+    public List<Long> deserialize(List<Long> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveLongList array0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
index 2fa4d28d7..9d4bd1c20 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
@@ -14,6 +14,10 @@
 import com.linkedin.avro.api.PrimitiveLongList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.TestEnum;
 import com.linkedin.avro.fastserde.generated.avro.TestFixed;
 import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
@@ -37,7 +41,11 @@ public Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243(Schema rea
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder)
+=======
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
@@ -58,14 +66,22 @@ public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(L
                 if ((reuse) instanceof GenericArray) {
                     arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
                 }
+<<<<<<< HEAD
                 array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder)));
+=======
+                array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen0 = (decoder.arrayNext());
         }
         return array0;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
@@ -75,6 +91,7 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
             TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
         }
         TestRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_TestRecord0((TestRecord), (decoder));
         populate_TestRecord1((TestRecord), (decoder));
         populate_TestRecord2((TestRecord), (decoder));
@@ -98,6 +115,31 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
     }
 
     private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -114,7 +156,11 @@ private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(2, (decoder.readLong()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -131,7 +177,11 @@ private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(4, (decoder.readDouble()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -148,7 +198,11 @@ private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(6, (decoder.readFloat()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -165,7 +219,11 @@ private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(8, (decoder.readBoolean()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -189,7 +247,11 @@ private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(10, byteBuffer0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -220,7 +282,11 @@ private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(12, charSequence0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
@@ -254,7 +320,11 @@ private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(14, testFixed1);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex7 = (decoder.readIndex());
@@ -314,7 +384,11 @@ private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(16, testFixedArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedUnionArray0 = null;
@@ -364,7 +438,11 @@ private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex9 = (decoder.readIndex());
@@ -400,7 +478,11 @@ private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(20, testEnumArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<TestEnum> testEnumUnionArray0 = null;
@@ -443,14 +525,22 @@ private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(22, null);
         } else {
             if (unionIndex11 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder)));
+=======
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
             }
         }
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
@@ -477,11 +567,19 @@ public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord
                 throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
             }
         }
+<<<<<<< HEAD
         populate_SubRecord0((SubRecord), (decoder));
         return SubRecord;
     }
 
     private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, Decoder decoder)
+=======
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex13 = (decoder.readIndex());
@@ -504,10 +602,17 @@ private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubR
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
         throws IOException
     {
         TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder)));
+=======
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
         long chunkLen5 = (decoder.readArrayStart());
         Object oldArray4 = TestRecord.get(24);
@@ -527,19 +632,28 @@ private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.Te
                 if (oldArray4 instanceof GenericArray) {
                     recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
                 }
+<<<<<<< HEAD
                 recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen5 = (decoder.arrayNext());
         }
         TestRecord.put(24, recordsArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
         long chunkLen6 = (decoder.readMapStart());
         if (chunkLen6 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
             Object oldMap0 = TestRecord.get(25);
             if (oldMap0 instanceof Map) {
@@ -550,16 +664,44 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMap0 = recordsMapReuse0;
             } else {
                 recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder)));
+=======
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen6 = (decoder.mapNext());
             } while (chunkLen6 > 0);
         } else {
+<<<<<<< HEAD
             recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(25, recordsMap0);
         int unionIndex14 = (decoder.readIndex());
@@ -593,7 +735,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                             recordsArrayUnionOption0 .add(null);
                         } else {
                             if (unionIndex15 == 1) {
+<<<<<<< HEAD
                                 recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder)));
+=======
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             } else {
                                 throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
                             }
@@ -608,7 +754,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex16 = (decoder.readIndex());
@@ -620,6 +770,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
                 long chunkLen8 = (decoder.readMapStart());
                 if (chunkLen8 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
                     Object oldMap1 = TestRecord.get(27);
                     if (oldMap1 instanceof Map) {
@@ -630,6 +781,22 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
                     } else {
                         recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
@@ -640,7 +807,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapUnionOption0 .put(key1, null);
                             } else {
                                 if (unionIndex17 == 1) {
+<<<<<<< HEAD
                                     recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
                                 }
@@ -649,7 +820,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen8 = (decoder.mapNext());
                     } while (chunkLen8 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(27, recordsMapUnionOption0);
             } else {
@@ -678,6 +857,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
                 long chunkLen10 = (decoder.readMapStart());
                 if (chunkLen10 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
                     if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
                         recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
@@ -687,6 +867,21 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsArrayMapElem0 = recordsArrayMapElemReuse0;
                     } else {
                         recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
@@ -697,7 +892,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapElem0 .put(key2, null);
                             } else {
                                 if (unionIndex18 == 1) {
+<<<<<<< HEAD
                                     recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
                                 }
@@ -706,7 +905,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen10 = (decoder.mapNext());
                     } while (chunkLen10 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 recordsArrayMap0 .add(recordsArrayMapElem0);
             }
@@ -715,12 +922,17 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(28, recordsArrayMap0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
         long chunkLen11 = (decoder.readMapStart());
         if (chunkLen11 > 0) {
+<<<<<<< HEAD
             Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
             Object oldMap2 = TestRecord.get(29);
             if (oldMap2 instanceof Map) {
@@ -731,6 +943,22 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMapArray0 = recordsMapArrayReuse0;
             } else {
                 recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
@@ -759,7 +987,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapArrayValue0 .add(null);
                             } else {
                                 if (unionIndex19 == 1) {
+<<<<<<< HEAD
                                     recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder)));
+=======
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
                                 }
@@ -772,7 +1004,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 chunkLen11 = (decoder.mapNext());
             } while (chunkLen11 > 0);
         } else {
+<<<<<<< HEAD
             recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(29, recordsMapArray0);
         int unionIndex20 = (decoder.readIndex());
@@ -803,6 +1043,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
                         long chunkLen14 = (decoder.readMapStart());
                         if (chunkLen14 > 0) {
+<<<<<<< HEAD
                             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
                             if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
                                 recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
@@ -812,6 +1053,21 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
                             } else {
                                 recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                             do {
                                 for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
@@ -822,7 +1078,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsArrayMapUnionOptionElem0 .put(key4, null);
                                     } else {
                                         if (unionIndex21 == 1) {
+<<<<<<< HEAD
                                             recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder)));
+=======
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
                                         }
@@ -831,7 +1091,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 chunkLen14 = (decoder.mapNext());
                             } while (chunkLen14 > 0);
                         } else {
+<<<<<<< HEAD
                             recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
                     }
@@ -844,7 +1112,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex22 = (decoder.readIndex());
@@ -856,6 +1128,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
                 long chunkLen15 = (decoder.readMapStart());
                 if (chunkLen15 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
                     Object oldMap3 = TestRecord.get(31);
                     if (oldMap3 instanceof Map) {
@@ -866,6 +1139,22 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
                     } else {
                         recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
@@ -894,7 +1183,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsMapArrayUnionOptionValue0 .add(null);
                                     } else {
                                         if (unionIndex23 == 1) {
+<<<<<<< HEAD
                                             recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder)));
+=======
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
                                         }
@@ -907,7 +1200,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen15 = (decoder.mapNext());
                     } while (chunkLen15 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(31, recordsMapArrayUnionOption0);
             } else {
@@ -920,7 +1221,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(32, null);
         } else {
             if (unionIndex24 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder)));
+=======
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex24 == 2) {
                     Utf8 charSequence4;
@@ -942,7 +1247,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveBooleanList booleanArray0 = null;
@@ -979,7 +1288,11 @@ private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(34, doubleArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveFloatList floatArray0 = null;
@@ -1003,7 +1316,11 @@ private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(36, intArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveLongList longArray0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_UNION_GenericDeserializer_777827233_777827233.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_UNION_GenericDeserializer_777827233_777827233.java
index b5e64128e..8a5268f39 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_UNION_GenericDeserializer_777827233_777827233.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_UNION_GenericDeserializer_777827233_777827233.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -26,7 +30,11 @@ public Array_of_UNION_GenericDeserializer_777827233_777827233(Schema readerSchem
         this.field0 = arrayElemOptionSchema0 .getField("field").schema();
     }
 
+<<<<<<< HEAD
     public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder)
+=======
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<IndexedRecord> array0 = null;
@@ -53,7 +61,11 @@ public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decode
                     array0 .add(null);
                 } else {
                     if (unionIndex0 == 1) {
+<<<<<<< HEAD
                         array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder)));
+=======
+                        array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     } else {
                         throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
                     }
@@ -64,7 +76,11 @@ public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decode
         return array0;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
index 24eaa7b1a..1fc369f27 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
@@ -14,6 +14,10 @@
 import com.linkedin.avro.api.PrimitiveLongList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.TestEnum;
 import com.linkedin.avro.fastserde.generated.avro.TestFixed;
 import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
@@ -37,7 +41,11 @@ public Array_of_UNION_SpecificDeserializer_1277939469_1277939469(Schema readerSc
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder)
+=======
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
@@ -64,7 +72,11 @@ public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(L
                     array0 .add(null);
                 } else {
                     if (unionIndex0 == 1) {
+<<<<<<< HEAD
                         array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder)));
+=======
+                        array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     } else {
                         throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
                     }
@@ -75,7 +87,11 @@ public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(L
         return array0;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
@@ -85,6 +101,7 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
             TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
         }
         TestRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_TestRecord0((TestRecord), (decoder));
         populate_TestRecord1((TestRecord), (decoder));
         populate_TestRecord2((TestRecord), (decoder));
@@ -108,6 +125,31 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
     }
 
     private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -124,7 +166,11 @@ private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(2, (decoder.readLong()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -141,7 +187,11 @@ private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(4, (decoder.readDouble()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -158,7 +208,11 @@ private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(6, (decoder.readFloat()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -175,7 +229,11 @@ private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(8, (decoder.readBoolean()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -199,7 +257,11 @@ private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(10, byteBuffer0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
@@ -230,7 +292,11 @@ private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(12, charSequence0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex7 = (decoder.readIndex());
@@ -264,7 +330,11 @@ private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(14, testFixed1);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex8 = (decoder.readIndex());
@@ -324,7 +394,11 @@ private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(16, testFixedArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedUnionArray0 = null;
@@ -374,7 +448,11 @@ private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex10 = (decoder.readIndex());
@@ -410,7 +488,11 @@ private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(20, testEnumArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<TestEnum> testEnumUnionArray0 = null;
@@ -453,14 +535,22 @@ private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(22, null);
         } else {
             if (unionIndex12 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder)));
+=======
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
             }
         }
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
@@ -487,11 +577,19 @@ public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord
                 throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
             }
         }
+<<<<<<< HEAD
         populate_SubRecord0((SubRecord), (decoder));
         return SubRecord;
     }
 
     private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, Decoder decoder)
+=======
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex14 = (decoder.readIndex());
@@ -514,10 +612,17 @@ private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubR
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
         throws IOException
     {
         TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder)));
+=======
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
         long chunkLen5 = (decoder.readArrayStart());
         Object oldArray4 = TestRecord.get(24);
@@ -537,19 +642,28 @@ private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.Te
                 if (oldArray4 instanceof GenericArray) {
                     recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
                 }
+<<<<<<< HEAD
                 recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen5 = (decoder.arrayNext());
         }
         TestRecord.put(24, recordsArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
         long chunkLen6 = (decoder.readMapStart());
         if (chunkLen6 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
             Object oldMap0 = TestRecord.get(25);
             if (oldMap0 instanceof Map) {
@@ -560,16 +674,44 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMap0 = recordsMapReuse0;
             } else {
                 recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder)));
+=======
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen6 = (decoder.mapNext());
             } while (chunkLen6 > 0);
         } else {
+<<<<<<< HEAD
             recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(25, recordsMap0);
         int unionIndex15 = (decoder.readIndex());
@@ -603,7 +745,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                             recordsArrayUnionOption0 .add(null);
                         } else {
                             if (unionIndex16 == 1) {
+<<<<<<< HEAD
                                 recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder)));
+=======
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             } else {
                                 throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
                             }
@@ -618,7 +764,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex17 = (decoder.readIndex());
@@ -630,6 +780,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
                 long chunkLen8 = (decoder.readMapStart());
                 if (chunkLen8 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
                     Object oldMap1 = TestRecord.get(27);
                     if (oldMap1 instanceof Map) {
@@ -640,6 +791,22 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
                     } else {
                         recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
@@ -650,7 +817,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapUnionOption0 .put(key1, null);
                             } else {
                                 if (unionIndex18 == 1) {
+<<<<<<< HEAD
                                     recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
                                 }
@@ -659,7 +830,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen8 = (decoder.mapNext());
                     } while (chunkLen8 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(27, recordsMapUnionOption0);
             } else {
@@ -688,6 +867,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
                 long chunkLen10 = (decoder.readMapStart());
                 if (chunkLen10 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
                     if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
                         recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
@@ -697,6 +877,21 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsArrayMapElem0 = recordsArrayMapElemReuse0;
                     } else {
                         recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
@@ -707,7 +902,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapElem0 .put(key2, null);
                             } else {
                                 if (unionIndex19 == 1) {
+<<<<<<< HEAD
                                     recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
                                 }
@@ -716,7 +915,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen10 = (decoder.mapNext());
                     } while (chunkLen10 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 recordsArrayMap0 .add(recordsArrayMapElem0);
             }
@@ -725,12 +932,17 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(28, recordsArrayMap0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
         long chunkLen11 = (decoder.readMapStart());
         if (chunkLen11 > 0) {
+<<<<<<< HEAD
             Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
             Object oldMap2 = TestRecord.get(29);
             if (oldMap2 instanceof Map) {
@@ -741,6 +953,22 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMapArray0 = recordsMapArrayReuse0;
             } else {
                 recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
@@ -769,7 +997,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapArrayValue0 .add(null);
                             } else {
                                 if (unionIndex20 == 1) {
+<<<<<<< HEAD
                                     recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder)));
+=======
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
                                 }
@@ -782,7 +1014,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 chunkLen11 = (decoder.mapNext());
             } while (chunkLen11 > 0);
         } else {
+<<<<<<< HEAD
             recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(29, recordsMapArray0);
         int unionIndex21 = (decoder.readIndex());
@@ -813,6 +1053,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
                         long chunkLen14 = (decoder.readMapStart());
                         if (chunkLen14 > 0) {
+<<<<<<< HEAD
                             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
                             if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
                                 recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
@@ -822,6 +1063,21 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
                             } else {
                                 recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                             do {
                                 for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
@@ -832,7 +1088,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsArrayMapUnionOptionElem0 .put(key4, null);
                                     } else {
                                         if (unionIndex22 == 1) {
+<<<<<<< HEAD
                                             recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder)));
+=======
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
                                         }
@@ -841,7 +1101,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 chunkLen14 = (decoder.mapNext());
                             } while (chunkLen14 > 0);
                         } else {
+<<<<<<< HEAD
                             recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
                     }
@@ -854,7 +1122,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex23 = (decoder.readIndex());
@@ -866,6 +1138,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
                 long chunkLen15 = (decoder.readMapStart());
                 if (chunkLen15 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
                     Object oldMap3 = TestRecord.get(31);
                     if (oldMap3 instanceof Map) {
@@ -876,6 +1149,22 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
                     } else {
                         recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
@@ -904,7 +1193,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsMapArrayUnionOptionValue0 .add(null);
                                     } else {
                                         if (unionIndex24 == 1) {
+<<<<<<< HEAD
                                             recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder)));
+=======
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
                                         }
@@ -917,7 +1210,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen15 = (decoder.mapNext());
                     } while (chunkLen15 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(31, recordsMapArrayUnionOption0);
             } else {
@@ -930,7 +1231,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(32, null);
         } else {
             if (unionIndex25 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder)));
+=======
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex25 == 2) {
                     Utf8 charSequence4;
@@ -952,7 +1257,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveBooleanList booleanArray0 = null;
@@ -989,7 +1298,11 @@ private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(34, doubleArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveFloatList floatArray0 = null;
@@ -1013,7 +1326,11 @@ private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(36, intArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveLongList longArray0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_record_GenericDeserializer_1606337179_2018567528.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_record_GenericDeserializer_1606337179_2018567528.java
index a316aef3b..0e5968582 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_record_GenericDeserializer_1606337179_2018567528.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_record_GenericDeserializer_1606337179_2018567528.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
@@ -22,7 +26,11 @@ public Array_of_record_GenericDeserializer_1606337179_2018567528(Schema readerSc
         this.unionOptionArrayElemSchema0 = readerSchema.getElementType();
     }
 
+<<<<<<< HEAD
     public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder)
+=======
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -48,7 +56,11 @@ public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decode
                         if ((reuse) instanceof GenericArray) {
                             unionOptionArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
                         }
+<<<<<<< HEAD
                         unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder)));
+=======
+                        unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     chunkLen0 = (decoder.arrayNext());
                 }
@@ -59,7 +71,11 @@ public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decode
         }
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_record_GenericDeserializer_477614132_477614132.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_record_GenericDeserializer_477614132_477614132.java
index 362a2f8fb..aad860c7d 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_record_GenericDeserializer_477614132_477614132.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Array_of_record_GenericDeserializer_477614132_477614132.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -24,7 +28,11 @@ public Array_of_record_GenericDeserializer_477614132_477614132(Schema readerSche
         this.field0 = arrayArrayElemSchema0 .getField("field").schema();
     }
 
+<<<<<<< HEAD
     public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder)
+=======
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<IndexedRecord> array0 = null;
@@ -45,14 +53,22 @@ public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decode
                 if ((reuse) instanceof GenericArray) {
                     arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
                 }
+<<<<<<< HEAD
                 array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder)));
+=======
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen0 = (decoder.arrayNext());
         }
         return array0;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
index e19c97cd8..9b5add82d 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -2018,6 +2022,7 @@ public FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_Ge
         this.f9990 = readerSchema.getField("F999").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -2025,6 +2030,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
@@ -2051,6 +2065,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbl
                 throw new RuntimeException(("Illegal union index for 'F0': "+ unionIndex0));
             }
         }
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (decoder));
@@ -2555,6 +2570,512 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbl
     }
 
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -2595,7 +3116,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -2636,7 +3161,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -2677,7 +3206,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex7 = (decoder.readIndex());
@@ -2718,7 +3251,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex9 = (decoder.readIndex());
@@ -2759,7 +3296,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex11 = (decoder.readIndex());
@@ -2800,7 +3341,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex13 = (decoder.readIndex());
@@ -2841,7 +3386,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex15 = (decoder.readIndex());
@@ -2882,7 +3431,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex17 = (decoder.readIndex());
@@ -2923,7 +3476,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex19 = (decoder.readIndex());
@@ -2964,7 +3521,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex21 = (decoder.readIndex());
@@ -3005,7 +3566,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex23 = (decoder.readIndex());
@@ -3046,7 +3611,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex25 = (decoder.readIndex());
@@ -3087,7 +3656,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex27 = (decoder.readIndex());
@@ -3128,7 +3701,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex29 = (decoder.readIndex());
@@ -3169,7 +3746,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex31 = (decoder.readIndex());
@@ -3210,7 +3791,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex33 = (decoder.readIndex());
@@ -3251,7 +3836,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex35 = (decoder.readIndex());
@@ -3292,7 +3881,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex37 = (decoder.readIndex());
@@ -3333,7 +3926,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex39 = (decoder.readIndex());
@@ -3374,7 +3971,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex41 = (decoder.readIndex());
@@ -3415,7 +4016,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex43 = (decoder.readIndex());
@@ -3456,7 +4061,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex45 = (decoder.readIndex());
@@ -3497,7 +4106,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex47 = (decoder.readIndex());
@@ -3538,7 +4151,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex49 = (decoder.readIndex());
@@ -3579,7 +4196,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex51 = (decoder.readIndex());
@@ -3620,7 +4241,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex53 = (decoder.readIndex());
@@ -3661,7 +4286,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex55 = (decoder.readIndex());
@@ -3702,7 +4331,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex57 = (decoder.readIndex());
@@ -3743,7 +4376,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex59 = (decoder.readIndex());
@@ -3784,7 +4421,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex61 = (decoder.readIndex());
@@ -3825,7 +4466,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex63 = (decoder.readIndex());
@@ -3866,7 +4511,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex65 = (decoder.readIndex());
@@ -3907,7 +4556,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex67 = (decoder.readIndex());
@@ -3948,7 +4601,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex69 = (decoder.readIndex());
@@ -3989,7 +4646,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex71 = (decoder.readIndex());
@@ -4030,7 +4691,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex73 = (decoder.readIndex());
@@ -4071,7 +4736,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex75 = (decoder.readIndex());
@@ -4112,7 +4781,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex77 = (decoder.readIndex());
@@ -4153,7 +4826,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex79 = (decoder.readIndex());
@@ -4194,7 +4871,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex81 = (decoder.readIndex());
@@ -4235,7 +4916,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex83 = (decoder.readIndex());
@@ -4276,7 +4961,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex85 = (decoder.readIndex());
@@ -4317,7 +5006,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex87 = (decoder.readIndex());
@@ -4358,7 +5051,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex89 = (decoder.readIndex());
@@ -4399,7 +5096,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex91 = (decoder.readIndex());
@@ -4440,7 +5141,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex93 = (decoder.readIndex());
@@ -4481,7 +5186,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex95 = (decoder.readIndex());
@@ -4522,7 +5231,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex97 = (decoder.readIndex());
@@ -4563,7 +5276,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex99 = (decoder.readIndex());
@@ -4604,7 +5321,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex101 = (decoder.readIndex());
@@ -4645,7 +5366,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex103 = (decoder.readIndex());
@@ -4686,7 +5411,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex105 = (decoder.readIndex());
@@ -4727,7 +5456,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex107 = (decoder.readIndex());
@@ -4768,7 +5501,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex109 = (decoder.readIndex());
@@ -4809,7 +5546,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex111 = (decoder.readIndex());
@@ -4850,7 +5591,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex113 = (decoder.readIndex());
@@ -4891,7 +5636,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex115 = (decoder.readIndex());
@@ -4932,7 +5681,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex117 = (decoder.readIndex());
@@ -4973,7 +5726,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex119 = (decoder.readIndex());
@@ -5014,7 +5771,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex121 = (decoder.readIndex());
@@ -5055,7 +5816,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex123 = (decoder.readIndex());
@@ -5096,7 +5861,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex125 = (decoder.readIndex());
@@ -5137,7 +5906,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex127 = (decoder.readIndex());
@@ -5178,7 +5951,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex129 = (decoder.readIndex());
@@ -5219,7 +5996,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex131 = (decoder.readIndex());
@@ -5260,7 +6041,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex133 = (decoder.readIndex());
@@ -5301,7 +6086,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex135 = (decoder.readIndex());
@@ -5342,7 +6131,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex137 = (decoder.readIndex());
@@ -5383,7 +6176,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex139 = (decoder.readIndex());
@@ -5424,7 +6221,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex141 = (decoder.readIndex());
@@ -5465,7 +6266,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex143 = (decoder.readIndex());
@@ -5506,7 +6311,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex145 = (decoder.readIndex());
@@ -5547,7 +6356,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex147 = (decoder.readIndex());
@@ -5588,7 +6401,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex149 = (decoder.readIndex());
@@ -5629,7 +6446,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex151 = (decoder.readIndex());
@@ -5670,7 +6491,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex153 = (decoder.readIndex());
@@ -5711,7 +6536,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex155 = (decoder.readIndex());
@@ -5752,7 +6581,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex157 = (decoder.readIndex());
@@ -5793,7 +6626,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex159 = (decoder.readIndex());
@@ -5834,7 +6671,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex161 = (decoder.readIndex());
@@ -5875,7 +6716,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex163 = (decoder.readIndex());
@@ -5916,7 +6761,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex165 = (decoder.readIndex());
@@ -5957,7 +6806,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex167 = (decoder.readIndex());
@@ -5998,7 +6851,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex169 = (decoder.readIndex());
@@ -6039,7 +6896,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex171 = (decoder.readIndex());
@@ -6080,7 +6941,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex173 = (decoder.readIndex());
@@ -6121,7 +6986,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex175 = (decoder.readIndex());
@@ -6162,7 +7031,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex177 = (decoder.readIndex());
@@ -6203,7 +7076,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex179 = (decoder.readIndex());
@@ -6244,7 +7121,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex181 = (decoder.readIndex());
@@ -6285,7 +7166,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex183 = (decoder.readIndex());
@@ -6326,7 +7211,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex185 = (decoder.readIndex());
@@ -6367,7 +7256,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex187 = (decoder.readIndex());
@@ -6408,7 +7301,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex189 = (decoder.readIndex());
@@ -6449,7 +7346,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex191 = (decoder.readIndex());
@@ -6490,7 +7391,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex193 = (decoder.readIndex());
@@ -6531,7 +7436,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex195 = (decoder.readIndex());
@@ -6572,7 +7481,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex197 = (decoder.readIndex());
@@ -6613,7 +7526,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex199 = (decoder.readIndex());
@@ -6654,7 +7571,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex201 = (decoder.readIndex());
@@ -6695,7 +7616,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex203 = (decoder.readIndex());
@@ -6736,7 +7661,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex205 = (decoder.readIndex());
@@ -6777,7 +7706,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex207 = (decoder.readIndex());
@@ -6818,7 +7751,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex209 = (decoder.readIndex());
@@ -6859,7 +7796,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex211 = (decoder.readIndex());
@@ -6900,7 +7841,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex213 = (decoder.readIndex());
@@ -6941,7 +7886,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex215 = (decoder.readIndex());
@@ -6982,7 +7931,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex217 = (decoder.readIndex());
@@ -7023,7 +7976,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex219 = (decoder.readIndex());
@@ -7064,7 +8021,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex221 = (decoder.readIndex());
@@ -7105,7 +8066,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex223 = (decoder.readIndex());
@@ -7146,7 +8111,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex225 = (decoder.readIndex());
@@ -7187,7 +8156,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex227 = (decoder.readIndex());
@@ -7228,7 +8201,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex229 = (decoder.readIndex());
@@ -7269,7 +8246,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex231 = (decoder.readIndex());
@@ -7310,7 +8291,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex233 = (decoder.readIndex());
@@ -7351,7 +8336,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex235 = (decoder.readIndex());
@@ -7392,7 +8381,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex237 = (decoder.readIndex());
@@ -7433,7 +8426,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex239 = (decoder.readIndex());
@@ -7474,7 +8471,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex241 = (decoder.readIndex());
@@ -7515,7 +8516,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex243 = (decoder.readIndex());
@@ -7556,7 +8561,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex245 = (decoder.readIndex());
@@ -7597,7 +8606,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex247 = (decoder.readIndex());
@@ -7638,7 +8651,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex249 = (decoder.readIndex());
@@ -7679,7 +8696,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex251 = (decoder.readIndex());
@@ -7720,7 +8741,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex253 = (decoder.readIndex());
@@ -7761,7 +8786,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex255 = (decoder.readIndex());
@@ -7802,7 +8831,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex257 = (decoder.readIndex());
@@ -7843,7 +8876,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex259 = (decoder.readIndex());
@@ -7884,7 +8921,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex261 = (decoder.readIndex());
@@ -7925,7 +8966,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex263 = (decoder.readIndex());
@@ -7966,7 +9011,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex265 = (decoder.readIndex());
@@ -8007,7 +9056,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex267 = (decoder.readIndex());
@@ -8048,7 +9101,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex269 = (decoder.readIndex());
@@ -8089,7 +9146,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex271 = (decoder.readIndex());
@@ -8130,7 +9191,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex273 = (decoder.readIndex());
@@ -8171,7 +9236,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex275 = (decoder.readIndex());
@@ -8212,7 +9281,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex277 = (decoder.readIndex());
@@ -8253,7 +9326,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex279 = (decoder.readIndex());
@@ -8294,7 +9371,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex281 = (decoder.readIndex());
@@ -8335,7 +9416,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex283 = (decoder.readIndex());
@@ -8376,7 +9461,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex285 = (decoder.readIndex());
@@ -8417,7 +9506,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex287 = (decoder.readIndex());
@@ -8458,7 +9551,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex289 = (decoder.readIndex());
@@ -8499,7 +9596,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex291 = (decoder.readIndex());
@@ -8540,7 +9641,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex293 = (decoder.readIndex());
@@ -8581,7 +9686,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex295 = (decoder.readIndex());
@@ -8622,7 +9731,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex297 = (decoder.readIndex());
@@ -8663,7 +9776,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex299 = (decoder.readIndex());
@@ -8704,7 +9821,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex301 = (decoder.readIndex());
@@ -8745,7 +9866,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex303 = (decoder.readIndex());
@@ -8786,7 +9911,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex305 = (decoder.readIndex());
@@ -8827,7 +9956,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex307 = (decoder.readIndex());
@@ -8868,7 +10001,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex309 = (decoder.readIndex());
@@ -8909,7 +10046,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex311 = (decoder.readIndex());
@@ -8950,7 +10091,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex313 = (decoder.readIndex());
@@ -8991,7 +10136,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex315 = (decoder.readIndex());
@@ -9032,7 +10181,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex317 = (decoder.readIndex());
@@ -9073,7 +10226,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex319 = (decoder.readIndex());
@@ -9114,7 +10271,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex321 = (decoder.readIndex());
@@ -9155,7 +10316,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex323 = (decoder.readIndex());
@@ -9196,7 +10361,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex325 = (decoder.readIndex());
@@ -9237,7 +10406,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex327 = (decoder.readIndex());
@@ -9278,7 +10451,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex329 = (decoder.readIndex());
@@ -9319,7 +10496,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex331 = (decoder.readIndex());
@@ -9360,7 +10541,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex333 = (decoder.readIndex());
@@ -9401,7 +10586,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex335 = (decoder.readIndex());
@@ -9442,7 +10631,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex337 = (decoder.readIndex());
@@ -9483,7 +10676,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex339 = (decoder.readIndex());
@@ -9524,7 +10721,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex341 = (decoder.readIndex());
@@ -9565,7 +10766,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex343 = (decoder.readIndex());
@@ -9606,7 +10811,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex345 = (decoder.readIndex());
@@ -9647,7 +10856,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex347 = (decoder.readIndex());
@@ -9688,7 +10901,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex349 = (decoder.readIndex());
@@ -9729,7 +10946,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex351 = (decoder.readIndex());
@@ -9770,7 +10991,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex353 = (decoder.readIndex());
@@ -9811,7 +11036,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex355 = (decoder.readIndex());
@@ -9852,7 +11081,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex357 = (decoder.readIndex());
@@ -9893,7 +11126,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex359 = (decoder.readIndex());
@@ -9934,7 +11171,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex361 = (decoder.readIndex());
@@ -9975,7 +11216,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex363 = (decoder.readIndex());
@@ -10016,7 +11261,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex365 = (decoder.readIndex());
@@ -10057,7 +11306,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex367 = (decoder.readIndex());
@@ -10098,7 +11351,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex369 = (decoder.readIndex());
@@ -10139,7 +11396,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex371 = (decoder.readIndex());
@@ -10180,7 +11441,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex373 = (decoder.readIndex());
@@ -10221,7 +11486,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex375 = (decoder.readIndex());
@@ -10262,7 +11531,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex377 = (decoder.readIndex());
@@ -10303,7 +11576,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex379 = (decoder.readIndex());
@@ -10344,7 +11621,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex381 = (decoder.readIndex());
@@ -10385,7 +11666,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex383 = (decoder.readIndex());
@@ -10426,7 +11711,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex385 = (decoder.readIndex());
@@ -10467,7 +11756,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex387 = (decoder.readIndex());
@@ -10508,7 +11801,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex389 = (decoder.readIndex());
@@ -10549,7 +11846,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex391 = (decoder.readIndex());
@@ -10590,7 +11891,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex393 = (decoder.readIndex());
@@ -10631,7 +11936,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex395 = (decoder.readIndex());
@@ -10672,7 +11981,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex397 = (decoder.readIndex());
@@ -10713,7 +12026,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex399 = (decoder.readIndex());
@@ -10754,7 +12071,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex401 = (decoder.readIndex());
@@ -10795,7 +12116,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex403 = (decoder.readIndex());
@@ -10836,7 +12161,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex405 = (decoder.readIndex());
@@ -10877,7 +12206,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex407 = (decoder.readIndex());
@@ -10918,7 +12251,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex409 = (decoder.readIndex());
@@ -10959,7 +12296,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex411 = (decoder.readIndex());
@@ -11000,7 +12341,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex413 = (decoder.readIndex());
@@ -11041,7 +12386,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex415 = (decoder.readIndex());
@@ -11082,7 +12431,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex417 = (decoder.readIndex());
@@ -11123,7 +12476,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex419 = (decoder.readIndex());
@@ -11164,7 +12521,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex421 = (decoder.readIndex());
@@ -11205,7 +12566,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex423 = (decoder.readIndex());
@@ -11246,7 +12611,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex425 = (decoder.readIndex());
@@ -11287,7 +12656,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex427 = (decoder.readIndex());
@@ -11328,7 +12701,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex429 = (decoder.readIndex());
@@ -11369,7 +12746,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex431 = (decoder.readIndex());
@@ -11410,7 +12791,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex433 = (decoder.readIndex());
@@ -11451,7 +12836,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex435 = (decoder.readIndex());
@@ -11492,7 +12881,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex437 = (decoder.readIndex());
@@ -11533,7 +12926,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex439 = (decoder.readIndex());
@@ -11574,7 +12971,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex441 = (decoder.readIndex());
@@ -11615,7 +13016,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex443 = (decoder.readIndex());
@@ -11656,7 +13061,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex445 = (decoder.readIndex());
@@ -11697,7 +13106,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex447 = (decoder.readIndex());
@@ -11738,7 +13151,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex449 = (decoder.readIndex());
@@ -11779,7 +13196,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex451 = (decoder.readIndex());
@@ -11820,7 +13241,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex453 = (decoder.readIndex());
@@ -11861,7 +13286,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex455 = (decoder.readIndex());
@@ -11902,7 +13331,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex457 = (decoder.readIndex());
@@ -11943,7 +13376,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex459 = (decoder.readIndex());
@@ -11984,7 +13421,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex461 = (decoder.readIndex());
@@ -12025,7 +13466,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex463 = (decoder.readIndex());
@@ -12066,7 +13511,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex465 = (decoder.readIndex());
@@ -12107,7 +13556,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex467 = (decoder.readIndex());
@@ -12148,7 +13601,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex469 = (decoder.readIndex());
@@ -12189,7 +13646,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex471 = (decoder.readIndex());
@@ -12230,7 +13691,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex473 = (decoder.readIndex());
@@ -12271,7 +13736,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex475 = (decoder.readIndex());
@@ -12312,7 +13781,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex477 = (decoder.readIndex());
@@ -12353,7 +13826,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex479 = (decoder.readIndex());
@@ -12394,7 +13871,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex481 = (decoder.readIndex());
@@ -12435,7 +13916,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex483 = (decoder.readIndex());
@@ -12476,7 +13961,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex485 = (decoder.readIndex());
@@ -12517,7 +14006,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex487 = (decoder.readIndex());
@@ -12558,7 +14051,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex489 = (decoder.readIndex());
@@ -12599,7 +14096,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex491 = (decoder.readIndex());
@@ -12640,7 +14141,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex493 = (decoder.readIndex());
@@ -12681,7 +14186,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex495 = (decoder.readIndex());
@@ -12722,7 +14231,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex497 = (decoder.readIndex());
@@ -12763,7 +14276,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex499 = (decoder.readIndex());
@@ -12804,7 +14321,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex501 = (decoder.readIndex());
@@ -12845,7 +14366,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex503 = (decoder.readIndex());
@@ -12886,7 +14411,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex505 = (decoder.readIndex());
@@ -12927,7 +14456,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex507 = (decoder.readIndex());
@@ -12968,7 +14501,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex509 = (decoder.readIndex());
@@ -13009,7 +14546,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex511 = (decoder.readIndex());
@@ -13050,7 +14591,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex513 = (decoder.readIndex());
@@ -13091,7 +14636,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex515 = (decoder.readIndex());
@@ -13132,7 +14681,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex517 = (decoder.readIndex());
@@ -13173,7 +14726,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex519 = (decoder.readIndex());
@@ -13214,7 +14771,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex521 = (decoder.readIndex());
@@ -13255,7 +14816,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex523 = (decoder.readIndex());
@@ -13296,7 +14861,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex525 = (decoder.readIndex());
@@ -13337,7 +14906,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex527 = (decoder.readIndex());
@@ -13378,7 +14951,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex529 = (decoder.readIndex());
@@ -13419,7 +14996,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex531 = (decoder.readIndex());
@@ -13460,7 +15041,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex533 = (decoder.readIndex());
@@ -13501,7 +15086,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex535 = (decoder.readIndex());
@@ -13542,7 +15131,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex537 = (decoder.readIndex());
@@ -13583,7 +15176,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex539 = (decoder.readIndex());
@@ -13624,7 +15221,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex541 = (decoder.readIndex());
@@ -13665,7 +15266,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex543 = (decoder.readIndex());
@@ -13706,7 +15311,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex545 = (decoder.readIndex());
@@ -13747,7 +15356,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex547 = (decoder.readIndex());
@@ -13788,7 +15401,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex549 = (decoder.readIndex());
@@ -13829,7 +15446,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex551 = (decoder.readIndex());
@@ -13870,7 +15491,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex553 = (decoder.readIndex());
@@ -13911,7 +15536,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex555 = (decoder.readIndex());
@@ -13952,7 +15581,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex557 = (decoder.readIndex());
@@ -13993,7 +15626,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex559 = (decoder.readIndex());
@@ -14034,7 +15671,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex561 = (decoder.readIndex());
@@ -14075,7 +15716,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex563 = (decoder.readIndex());
@@ -14116,7 +15761,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex565 = (decoder.readIndex());
@@ -14157,7 +15806,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex567 = (decoder.readIndex());
@@ -14198,7 +15851,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex569 = (decoder.readIndex());
@@ -14239,7 +15896,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex571 = (decoder.readIndex());
@@ -14280,7 +15941,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex573 = (decoder.readIndex());
@@ -14321,7 +15986,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex575 = (decoder.readIndex());
@@ -14362,7 +16031,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex577 = (decoder.readIndex());
@@ -14403,7 +16076,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex579 = (decoder.readIndex());
@@ -14444,7 +16121,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex581 = (decoder.readIndex());
@@ -14485,7 +16166,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex583 = (decoder.readIndex());
@@ -14526,7 +16211,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex585 = (decoder.readIndex());
@@ -14567,7 +16256,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex587 = (decoder.readIndex());
@@ -14608,7 +16301,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex589 = (decoder.readIndex());
@@ -14649,7 +16346,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex591 = (decoder.readIndex());
@@ -14690,7 +16391,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex593 = (decoder.readIndex());
@@ -14731,7 +16436,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex595 = (decoder.readIndex());
@@ -14772,7 +16481,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex597 = (decoder.readIndex());
@@ -14813,7 +16526,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex599 = (decoder.readIndex());
@@ -14854,7 +16571,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex601 = (decoder.readIndex());
@@ -14895,7 +16616,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex603 = (decoder.readIndex());
@@ -14936,7 +16661,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex605 = (decoder.readIndex());
@@ -14977,7 +16706,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex607 = (decoder.readIndex());
@@ -15018,7 +16751,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex609 = (decoder.readIndex());
@@ -15059,7 +16796,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex611 = (decoder.readIndex());
@@ -15100,7 +16841,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex613 = (decoder.readIndex());
@@ -15141,7 +16886,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex615 = (decoder.readIndex());
@@ -15182,7 +16931,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex617 = (decoder.readIndex());
@@ -15223,7 +16976,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex619 = (decoder.readIndex());
@@ -15264,7 +17021,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex621 = (decoder.readIndex());
@@ -15305,7 +17066,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex623 = (decoder.readIndex());
@@ -15346,7 +17111,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex625 = (decoder.readIndex());
@@ -15387,7 +17156,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex627 = (decoder.readIndex());
@@ -15428,7 +17201,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex629 = (decoder.readIndex());
@@ -15469,7 +17246,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex631 = (decoder.readIndex());
@@ -15510,7 +17291,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex633 = (decoder.readIndex());
@@ -15551,7 +17336,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex635 = (decoder.readIndex());
@@ -15592,7 +17381,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex637 = (decoder.readIndex());
@@ -15633,7 +17426,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex639 = (decoder.readIndex());
@@ -15674,7 +17471,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex641 = (decoder.readIndex());
@@ -15715,7 +17516,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex643 = (decoder.readIndex());
@@ -15756,7 +17561,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex645 = (decoder.readIndex());
@@ -15797,7 +17606,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex647 = (decoder.readIndex());
@@ -15838,7 +17651,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex649 = (decoder.readIndex());
@@ -15879,7 +17696,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex651 = (decoder.readIndex());
@@ -15920,7 +17741,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex653 = (decoder.readIndex());
@@ -15961,7 +17786,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex655 = (decoder.readIndex());
@@ -16002,7 +17831,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex657 = (decoder.readIndex());
@@ -16043,7 +17876,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex659 = (decoder.readIndex());
@@ -16084,7 +17921,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex661 = (decoder.readIndex());
@@ -16125,7 +17966,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex663 = (decoder.readIndex());
@@ -16166,7 +18011,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex665 = (decoder.readIndex());
@@ -16207,7 +18056,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex667 = (decoder.readIndex());
@@ -16248,7 +18101,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex669 = (decoder.readIndex());
@@ -16289,7 +18146,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex671 = (decoder.readIndex());
@@ -16330,7 +18191,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex673 = (decoder.readIndex());
@@ -16371,7 +18236,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex675 = (decoder.readIndex());
@@ -16412,7 +18281,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex677 = (decoder.readIndex());
@@ -16453,7 +18326,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex679 = (decoder.readIndex());
@@ -16494,7 +18371,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex681 = (decoder.readIndex());
@@ -16535,7 +18416,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex683 = (decoder.readIndex());
@@ -16576,7 +18461,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex685 = (decoder.readIndex());
@@ -16617,7 +18506,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex687 = (decoder.readIndex());
@@ -16658,7 +18551,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex689 = (decoder.readIndex());
@@ -16699,7 +18596,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex691 = (decoder.readIndex());
@@ -16740,7 +18641,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex693 = (decoder.readIndex());
@@ -16781,7 +18686,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex695 = (decoder.readIndex());
@@ -16822,7 +18731,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex697 = (decoder.readIndex());
@@ -16863,7 +18776,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex699 = (decoder.readIndex());
@@ -16904,7 +18821,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex701 = (decoder.readIndex());
@@ -16945,7 +18866,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex703 = (decoder.readIndex());
@@ -16986,7 +18911,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex705 = (decoder.readIndex());
@@ -17027,7 +18956,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex707 = (decoder.readIndex());
@@ -17068,7 +19001,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex709 = (decoder.readIndex());
@@ -17109,7 +19046,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex711 = (decoder.readIndex());
@@ -17150,7 +19091,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex713 = (decoder.readIndex());
@@ -17191,7 +19136,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex715 = (decoder.readIndex());
@@ -17232,7 +19181,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex717 = (decoder.readIndex());
@@ -17273,7 +19226,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex719 = (decoder.readIndex());
@@ -17314,7 +19271,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex721 = (decoder.readIndex());
@@ -17355,7 +19316,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex723 = (decoder.readIndex());
@@ -17396,7 +19361,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex725 = (decoder.readIndex());
@@ -17437,7 +19406,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex727 = (decoder.readIndex());
@@ -17478,7 +19451,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex729 = (decoder.readIndex());
@@ -17519,7 +19496,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex731 = (decoder.readIndex());
@@ -17560,7 +19541,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex733 = (decoder.readIndex());
@@ -17601,7 +19586,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex735 = (decoder.readIndex());
@@ -17642,7 +19631,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex737 = (decoder.readIndex());
@@ -17683,7 +19676,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex739 = (decoder.readIndex());
@@ -17724,7 +19721,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex741 = (decoder.readIndex());
@@ -17765,7 +19766,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex743 = (decoder.readIndex());
@@ -17806,7 +19811,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex745 = (decoder.readIndex());
@@ -17847,7 +19856,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex747 = (decoder.readIndex());
@@ -17888,7 +19901,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex749 = (decoder.readIndex());
@@ -17929,7 +19946,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex751 = (decoder.readIndex());
@@ -17970,7 +19991,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex753 = (decoder.readIndex());
@@ -18011,7 +20036,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex755 = (decoder.readIndex());
@@ -18052,7 +20081,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex757 = (decoder.readIndex());
@@ -18093,7 +20126,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex759 = (decoder.readIndex());
@@ -18134,7 +20171,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex761 = (decoder.readIndex());
@@ -18175,7 +20216,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex763 = (decoder.readIndex());
@@ -18216,7 +20261,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex765 = (decoder.readIndex());
@@ -18257,7 +20306,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex767 = (decoder.readIndex());
@@ -18298,7 +20351,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex769 = (decoder.readIndex());
@@ -18339,7 +20396,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex771 = (decoder.readIndex());
@@ -18380,7 +20441,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex773 = (decoder.readIndex());
@@ -18421,7 +20486,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex775 = (decoder.readIndex());
@@ -18462,7 +20531,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex777 = (decoder.readIndex());
@@ -18503,7 +20576,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex779 = (decoder.readIndex());
@@ -18544,7 +20621,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex781 = (decoder.readIndex());
@@ -18585,7 +20666,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex783 = (decoder.readIndex());
@@ -18626,7 +20711,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex785 = (decoder.readIndex());
@@ -18667,7 +20756,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex787 = (decoder.readIndex());
@@ -18708,7 +20801,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex789 = (decoder.readIndex());
@@ -18749,7 +20846,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex791 = (decoder.readIndex());
@@ -18790,7 +20891,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex793 = (decoder.readIndex());
@@ -18831,7 +20936,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex795 = (decoder.readIndex());
@@ -18872,7 +20981,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex797 = (decoder.readIndex());
@@ -18913,7 +21026,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex799 = (decoder.readIndex());
@@ -18954,7 +21071,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex801 = (decoder.readIndex());
@@ -18995,7 +21116,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex803 = (decoder.readIndex());
@@ -19036,7 +21161,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex805 = (decoder.readIndex());
@@ -19077,7 +21206,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex807 = (decoder.readIndex());
@@ -19118,7 +21251,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex809 = (decoder.readIndex());
@@ -19159,7 +21296,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex811 = (decoder.readIndex());
@@ -19200,7 +21341,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex813 = (decoder.readIndex());
@@ -19241,7 +21386,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex815 = (decoder.readIndex());
@@ -19282,7 +21431,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex817 = (decoder.readIndex());
@@ -19323,7 +21476,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex819 = (decoder.readIndex());
@@ -19364,7 +21521,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex821 = (decoder.readIndex());
@@ -19405,7 +21566,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex823 = (decoder.readIndex());
@@ -19446,7 +21611,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex825 = (decoder.readIndex());
@@ -19487,7 +21656,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex827 = (decoder.readIndex());
@@ -19528,7 +21701,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex829 = (decoder.readIndex());
@@ -19569,7 +21746,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex831 = (decoder.readIndex());
@@ -19610,7 +21791,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex833 = (decoder.readIndex());
@@ -19651,7 +21836,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex835 = (decoder.readIndex());
@@ -19692,7 +21881,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex837 = (decoder.readIndex());
@@ -19733,7 +21926,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex839 = (decoder.readIndex());
@@ -19774,7 +21971,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex841 = (decoder.readIndex());
@@ -19815,7 +22016,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex843 = (decoder.readIndex());
@@ -19856,7 +22061,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex845 = (decoder.readIndex());
@@ -19897,7 +22106,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex847 = (decoder.readIndex());
@@ -19938,7 +22151,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex849 = (decoder.readIndex());
@@ -19979,7 +22196,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex851 = (decoder.readIndex());
@@ -20020,7 +22241,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex853 = (decoder.readIndex());
@@ -20061,7 +22286,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex855 = (decoder.readIndex());
@@ -20102,7 +22331,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex857 = (decoder.readIndex());
@@ -20143,7 +22376,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex859 = (decoder.readIndex());
@@ -20184,7 +22421,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex861 = (decoder.readIndex());
@@ -20225,7 +22466,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex863 = (decoder.readIndex());
@@ -20266,7 +22511,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex865 = (decoder.readIndex());
@@ -20307,7 +22556,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex867 = (decoder.readIndex());
@@ -20348,7 +22601,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex869 = (decoder.readIndex());
@@ -20389,7 +22646,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex871 = (decoder.readIndex());
@@ -20430,7 +22691,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex873 = (decoder.readIndex());
@@ -20471,7 +22736,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex875 = (decoder.readIndex());
@@ -20512,7 +22781,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex877 = (decoder.readIndex());
@@ -20553,7 +22826,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex879 = (decoder.readIndex());
@@ -20594,7 +22871,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex881 = (decoder.readIndex());
@@ -20635,7 +22916,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex883 = (decoder.readIndex());
@@ -20676,7 +22961,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex885 = (decoder.readIndex());
@@ -20717,7 +23006,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex887 = (decoder.readIndex());
@@ -20758,7 +23051,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex889 = (decoder.readIndex());
@@ -20799,7 +23096,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex891 = (decoder.readIndex());
@@ -20840,7 +23141,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex893 = (decoder.readIndex());
@@ -20881,7 +23186,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex895 = (decoder.readIndex());
@@ -20922,7 +23231,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex897 = (decoder.readIndex());
@@ -20963,7 +23276,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex899 = (decoder.readIndex());
@@ -21004,7 +23321,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex901 = (decoder.readIndex());
@@ -21045,7 +23366,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex903 = (decoder.readIndex());
@@ -21086,7 +23411,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex905 = (decoder.readIndex());
@@ -21127,7 +23456,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex907 = (decoder.readIndex());
@@ -21168,7 +23501,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex909 = (decoder.readIndex());
@@ -21209,7 +23546,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex911 = (decoder.readIndex());
@@ -21250,7 +23591,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex913 = (decoder.readIndex());
@@ -21291,7 +23636,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex915 = (decoder.readIndex());
@@ -21332,7 +23681,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex917 = (decoder.readIndex());
@@ -21373,7 +23726,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex919 = (decoder.readIndex());
@@ -21414,7 +23771,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex921 = (decoder.readIndex());
@@ -21455,7 +23816,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex923 = (decoder.readIndex());
@@ -21496,7 +23861,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex925 = (decoder.readIndex());
@@ -21537,7 +23906,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex927 = (decoder.readIndex());
@@ -21578,7 +23951,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex929 = (decoder.readIndex());
@@ -21619,7 +23996,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex931 = (decoder.readIndex());
@@ -21660,7 +24041,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex933 = (decoder.readIndex());
@@ -21701,7 +24086,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex935 = (decoder.readIndex());
@@ -21742,7 +24131,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex937 = (decoder.readIndex());
@@ -21783,7 +24176,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex939 = (decoder.readIndex());
@@ -21824,7 +24221,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex941 = (decoder.readIndex());
@@ -21865,7 +24266,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex943 = (decoder.readIndex());
@@ -21906,7 +24311,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex945 = (decoder.readIndex());
@@ -21947,7 +24356,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex947 = (decoder.readIndex());
@@ -21988,7 +24401,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex949 = (decoder.readIndex());
@@ -22029,7 +24446,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex951 = (decoder.readIndex());
@@ -22070,7 +24491,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex953 = (decoder.readIndex());
@@ -22111,7 +24536,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex955 = (decoder.readIndex());
@@ -22152,7 +24581,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex957 = (decoder.readIndex());
@@ -22193,7 +24626,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex959 = (decoder.readIndex());
@@ -22234,7 +24671,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex961 = (decoder.readIndex());
@@ -22275,7 +24716,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex963 = (decoder.readIndex());
@@ -22316,7 +24761,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex965 = (decoder.readIndex());
@@ -22357,7 +24806,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex967 = (decoder.readIndex());
@@ -22398,7 +24851,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex969 = (decoder.readIndex());
@@ -22439,7 +24896,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex971 = (decoder.readIndex());
@@ -22480,7 +24941,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex973 = (decoder.readIndex());
@@ -22521,7 +24986,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex975 = (decoder.readIndex());
@@ -22562,7 +25031,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex977 = (decoder.readIndex());
@@ -22603,7 +25076,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex979 = (decoder.readIndex());
@@ -22644,7 +25121,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex981 = (decoder.readIndex());
@@ -22685,7 +25166,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex983 = (decoder.readIndex());
@@ -22726,7 +25211,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex985 = (decoder.readIndex());
@@ -22767,7 +25256,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex987 = (decoder.readIndex());
@@ -22808,7 +25301,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex989 = (decoder.readIndex());
@@ -22849,7 +25346,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex991 = (decoder.readIndex());
@@ -22890,7 +25391,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex993 = (decoder.readIndex());
@@ -22931,7 +25436,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex995 = (decoder.readIndex());
@@ -22972,7 +25481,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex997 = (decoder.readIndex());
@@ -23013,7 +25526,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVer
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex999 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
index e1343d7ac..4c109affe 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -22,6 +26,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeseri
         this.testStringUnionAlias0 = readerSchema.getField("testStringUnionAlias").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -29,6 +34,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
@@ -55,11 +69,19 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadA
                 throw new RuntimeException(("Illegal union index for 'testString': "+ unionIndex0));
             }
         }
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0((FastGenericDeserializerGeneratorTest_shouldReadAliasedField), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
     }
 
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0((FastGenericDeserializerGeneratorTest_shouldReadAliasedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java
index 320591b7e..610d402ad 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java
@@ -7,6 +7,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
@@ -58,6 +62,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeseria
         this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -65,6 +70,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnumDefault0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnumDefault0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnumDefault0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault;
@@ -86,12 +100,21 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadE
             }
         }
         FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(0, enumValue0);
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault0((FastGenericDeserializerGeneratorTest_shouldReadEnumDefault), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault1((FastGenericDeserializerGeneratorTest_shouldReadEnumDefault), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadEnumDefault;
     }
 
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault0((FastGenericDeserializerGeneratorTest_shouldReadEnumDefault), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault1((FastGenericDeserializerGeneratorTest_shouldReadEnumDefault), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnumDefault;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -151,7 +174,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault
         FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(2, testEnumArray1);
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericEnumSymbol> testEnumUnionArray1 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
index 1a3daa824..5b6427344 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.GenericEnumSymbol;
@@ -30,6 +34,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_6
         this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -37,6 +42,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum;
@@ -46,12 +60,21 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadE
             FastGenericDeserializerGeneratorTest_shouldReadEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
         }
         FastGenericDeserializerGeneratorTest_shouldReadEnum.put(0, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadEnum;
     }
 
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -87,7 +110,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(Index
         FastGenericDeserializerGeneratorTest_shouldReadEnum.put(2, testEnumArray1);
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericEnumSymbol> testEnumUnionArray1 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
index 9c72ec426..12c085c18 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.GenericFixed;
@@ -30,6 +34,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_
         this.testFixedUnionArrayArrayElemSchema0 = testFixedUnionArray0 .getElementType();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -37,6 +42,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed;
@@ -54,12 +68,21 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadF
         }
         decoder.readFixed(testFixed1);
         FastGenericDeserializerGeneratorTest_shouldReadFixed.put(0, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed1));
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadFixed;
     }
 
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadFixed;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -115,7 +138,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(Inde
         FastGenericDeserializerGeneratorTest_shouldReadFixed.put(2, testFixedArray1);
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedUnionArray1 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
index 9a6bf56b3..dc6ef67c6 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,6 +28,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_Generi
         this.subField0 = unionOptionSchema0 .getField("subField").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -31,6 +36,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
@@ -45,7 +59,11 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadM
             FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, null);
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder)));
+=======
+                FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex0 == 2) {
                     Utf8 charSequence1;
@@ -68,7 +86,11 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadM
         return FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
index 6ba24cae2..451da39aa 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
@@ -7,6 +7,10 @@
 import java.util.Map;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -29,6 +33,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeseriali
         this.mapFieldValueMapValueSchema0 = mapFieldMapValueSchema0 .getValueType();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -36,6 +41,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
@@ -47,6 +61,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadN
         Map<Utf8, Map<Utf8, List<Integer>>> mapField1 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
             Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
             if (oldMap0 instanceof Map) {
@@ -57,6 +72,22 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadN
                 mapField1 = mapFieldReuse0;
             } else {
                 mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
+                if (oldMap0 instanceof Map) {
+                    mapFieldReuse0 = ((Map) oldMap0);
+                }
+                if (mapFieldReuse0 != (null)) {
+                    mapFieldReuse0 .clear();
+                    mapField1 = mapFieldReuse0;
+                } else {
+                    mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -64,6 +95,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadN
                     Map<Utf8, List<Integer>> mapFieldValue0 = null;
                     long chunkLen1 = (decoder.readMapStart());
                     if (chunkLen1 > 0) {
+<<<<<<< HEAD
                         Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
                         if (null instanceof Map) {
                             mapFieldValueReuse0 = ((Map) null);
@@ -73,6 +105,21 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadN
                             mapFieldValue0 = mapFieldValueReuse0;
                         } else {
                             mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, ((int) chunkLen1)));
+                        } else {
+                            Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
+                            if (null instanceof Map) {
+                                mapFieldValueReuse0 = ((Map) null);
+                            }
+                            if (mapFieldValueReuse0 != (null)) {
+                                mapFieldValueReuse0 .clear();
+                                mapFieldValue0 = mapFieldValueReuse0;
+                            } else {
+                                mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         do {
                             for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
@@ -96,14 +143,30 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadN
                             chunkLen1 = (decoder.mapNext());
                         } while (chunkLen1 > 0);
                     } else {
+<<<<<<< HEAD
                         mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+=======
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, 0));
+                        } else {
+                            mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     mapField1 .put(key0, mapFieldValue0);
                 }
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), 0));
+            } else {
+                mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastGenericDeserializerGeneratorTest_shouldReadNestedMap.put(0, mapField1);
         return FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
index 3dd52ee5f..97343d17d 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
@@ -7,6 +7,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
@@ -66,6 +70,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDese
         this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -73,6 +78,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
@@ -94,12 +108,21 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadP
             }
         }
         FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(0, enumValue0);
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
     }
 
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -159,7 +182,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedE
         FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(2, testEnumArray1);
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericEnumSymbol> testEnumUnionArray1 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
index d282cf38a..2308e8f99 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.nio.ByteBuffer;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -33,6 +37,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserial
         this.testBytesUnion0 = readerSchema.getField("testBytesUnion").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -40,6 +45,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
@@ -49,6 +63,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadP
             FastGenericDeserializerGeneratorTest_shouldReadPrimitives = new org.apache.avro.generic.GenericData.Record(readerSchema);
         }
         FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (decoder));
@@ -60,6 +75,19 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadP
     }
 
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -83,7 +111,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0
         FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(2, charSequence0);
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -107,7 +139,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1
         FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(4, (decoder.readLong()));
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -124,7 +160,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2
         FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(6, (decoder.readDouble()));
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -141,7 +181,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3
         FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(8, (decoder.readFloat()));
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -158,7 +202,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4
         FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(10, (decoder.readBoolean()));
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -182,7 +230,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5
         FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(12, byteBuffer0);
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
index 3d5b7735d..f7a868808 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -32,6 +36,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecor
         this.recordArray0 = readerSchema.getField("recordArray").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -39,6 +44,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
@@ -47,12 +61,21 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadS
         } else {
             FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
         }
+<<<<<<< HEAD
         FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder)));
         populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
     }
 
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -83,10 +106,17 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
         return subRecord;
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, Decoder decoder)
         throws IOException
     {
         FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder)));
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<IndexedRecord> recordArray1 = null;
         long chunkLen0 = (decoder.readArrayStart());
         Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
@@ -106,14 +136,22 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAnd
                 if (oldArray0 instanceof GenericArray) {
                     recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
                 }
+<<<<<<< HEAD
                 recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen0 = (decoder.arrayNext());
         }
         FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -133,11 +171,19 @@ public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder)
                 throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex1));
             }
         }
+<<<<<<< HEAD
         populate_subRecord0((subRecord), (decoder));
         return subRecord;
     }
 
     private void populate_subRecord0(IndexedRecord subRecord, Decoder decoder)
+=======
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
index e84ee31ed..a3e47d4a8 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -32,6 +36,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecor
         this.recordArray0 = readerSchema.getField("recordArray").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -39,6 +44,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
@@ -47,12 +61,21 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadS
         } else {
             FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
         }
+<<<<<<< HEAD
         FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder)));
         populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
     }
 
     public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder)
+=======
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord aliasedSubRecord;
@@ -71,11 +94,19 @@ public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder)
                 throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex0));
             }
         }
+<<<<<<< HEAD
         populate_aliasedSubRecord0((aliasedSubRecord), (decoder));
         return aliasedSubRecord;
     }
 
     private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, Decoder decoder)
+=======
+        populate_aliasedSubRecord0((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -98,10 +129,17 @@ private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, Decoder
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, Decoder decoder)
         throws IOException
     {
         FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder)));
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<IndexedRecord> recordArray1 = null;
         long chunkLen0 = (decoder.readArrayStart());
         Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
@@ -121,14 +159,22 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAnd
                 if (oldArray0 instanceof GenericArray) {
                     recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
                 }
+<<<<<<< HEAD
                 recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen0 = (decoder.arrayNext());
         }
         FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord aliasedSubRecord;
@@ -148,11 +194,19 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
                 throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex2));
             }
         }
+<<<<<<< HEAD
         populate_aliasedSubRecord1((aliasedSubRecord), (decoder));
         return aliasedSubRecord;
     }
 
     private void populate_aliasedSubRecord1(IndexedRecord aliasedSubRecord, Decoder decoder)
+=======
+        populate_aliasedSubRecord1((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord1(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
index 90c1028b2..94611ea07 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
@@ -6,6 +6,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -42,6 +46,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_
         this.recordsMapUnionOptionMapValueSchema0 = recordsMapUnionOptionSchema0 .getValueType();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -49,6 +54,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
@@ -76,17 +90,30 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadS
                 if (oldArray0 instanceof GenericArray) {
                     recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
                 }
+<<<<<<< HEAD
                 recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen0 = (decoder.arrayNext());
         }
         FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(0, recordsArray1);
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
     }
 
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -116,12 +143,17 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
         return subRecord;
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, IndexedRecord> recordsMap1 = null;
         long chunkLen1 = (decoder.readMapStart());
         if (chunkLen1 > 0) {
+<<<<<<< HEAD
             Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
             Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
             if (oldMap0 instanceof Map) {
@@ -132,16 +164,44 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                 recordsMap1 = recordsMapReuse0;
             } else {
                 recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap1 = recordsMapReuse0;
+                } else {
+                    recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     recordsMap1 .put(key0, deserializesubRecord0(null, (decoder)));
+=======
+                    recordsMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen1 = (decoder.mapNext());
             } while (chunkLen1 > 0);
         } else {
+<<<<<<< HEAD
             recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), 0));
+            } else {
+                recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(1, recordsMap1);
         int unionIndex1 = (decoder.readIndex());
@@ -175,7 +235,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                             recordsArrayUnionOption0 .add(null);
                         } else {
                             if (unionIndex2 == 1) {
+<<<<<<< HEAD
                                 recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder)));
+=======
+                                recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             } else {
                                 throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex2));
                             }
@@ -190,7 +254,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -202,6 +270,7 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                 Map<Utf8, IndexedRecord> recordsMapUnionOption0 = null;
                 long chunkLen3 = (decoder.readMapStart());
                 if (chunkLen3 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
                     Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
                     if (oldMap1 instanceof Map) {
@@ -212,6 +281,22 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                         recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
                     } else {
                         recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), ((int) chunkLen3)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
@@ -222,7 +307,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                                 recordsMapUnionOption0 .put(key1, null);
                             } else {
                                 if (unionIndex4 == 1) {
+<<<<<<< HEAD
                                     recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder)));
+=======
+                                    recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex4));
                                 }
@@ -231,7 +320,15 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                         chunkLen3 = (decoder.mapNext());
                     } while (chunkLen3 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, recordsMapUnionOption0);
             } else {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
index 48996fc1e..2a1c59d47 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
@@ -6,6 +6,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -50,6 +54,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollection
         this.recordsMapArrayUnionOptionValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -57,6 +62,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
@@ -87,6 +101,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadS
                 Map<Utf8, IndexedRecord> recordsArrayMapElem0 = null;
                 long chunkLen1 = (decoder.readMapStart());
                 if (chunkLen1 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
                     if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
                         recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
@@ -96,6 +111,21 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadS
                         recordsArrayMapElem0 = recordsArrayMapElemReuse0;
                     } else {
                         recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
@@ -106,7 +136,11 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadS
                                 recordsArrayMapElem0 .put(key0, null);
                             } else {
                                 if (unionIndex0 == 1) {
+<<<<<<< HEAD
                                     recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder)));
+=======
+                                    recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex0));
                                 }
@@ -115,19 +149,36 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadS
                         chunkLen1 = (decoder.mapNext());
                     } while (chunkLen1 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 recordsArrayMap1 .add(recordsArrayMapElem0);
             }
             chunkLen0 = (decoder.arrayNext());
         }
         FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(0, recordsArrayMap1);
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
     }
 
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -157,12 +208,17 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
         return subRecord;
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, List<IndexedRecord>> recordsMapArray1 = null;
         long chunkLen2 = (decoder.readMapStart());
         if (chunkLen2 > 0) {
+<<<<<<< HEAD
             Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
             Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
             if (oldMap0 instanceof Map) {
@@ -173,6 +229,22 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                 recordsMapArray1 = recordsMapArrayReuse0;
             } else {
                 recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray1 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
@@ -201,7 +273,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                                 recordsMapArrayValue0 .add(null);
                             } else {
                                 if (unionIndex2 == 1) {
+<<<<<<< HEAD
                                     recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder)));
+=======
+                                    recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex2));
                                 }
@@ -214,7 +290,15 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                 chunkLen2 = (decoder.mapNext());
             } while (chunkLen2 > 0);
         } else {
+<<<<<<< HEAD
             recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), 0));
+            } else {
+                recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(1, recordsMapArray1);
         int unionIndex3 = (decoder.readIndex());
@@ -245,6 +329,7 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                         Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElem0 = null;
                         long chunkLen5 = (decoder.readMapStart());
                         if (chunkLen5 > 0) {
+<<<<<<< HEAD
                             Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
                             if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
                                 recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
@@ -254,6 +339,21 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                                 recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
                             } else {
                                 recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen5)));
+                            } else {
+                                Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                             do {
                                 for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
@@ -264,7 +364,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                                         recordsArrayMapUnionOptionElem0 .put(key2, null);
                                     } else {
                                         if (unionIndex4 == 1) {
+<<<<<<< HEAD
                                             recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder)));
+=======
+                                            recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex4));
                                         }
@@ -273,7 +377,15 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                                 chunkLen5 = (decoder.mapNext());
                             } while (chunkLen5 > 0);
                         } else {
+<<<<<<< HEAD
                             recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
                     }
@@ -286,7 +398,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -298,6 +414,7 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                 Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOption0 = null;
                 long chunkLen6 = (decoder.readMapStart());
                 if (chunkLen6 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
                     Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
                     if (oldMap1 instanceof Map) {
@@ -308,6 +425,22 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                         recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
                     } else {
                         recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), ((int) chunkLen6)));
+                    } else {
+                        Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
@@ -336,7 +469,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                                         recordsMapArrayUnionOptionValue0 .add(null);
                                     } else {
                                         if (unionIndex6 == 1) {
+<<<<<<< HEAD
                                             recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder)));
+=======
+                                            recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex6));
                                         }
@@ -349,7 +486,15 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCo
                         chunkLen6 = (decoder.mapNext());
                     } while (chunkLen6 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, recordsMapArrayUnionOption0);
             } else {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
index 0f99a572f..ed7280bb2 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -26,6 +30,7 @@ public FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDese
         this.field0 = readerSchema.getField("field").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -33,6 +38,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
@@ -47,16 +61,28 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadS
             FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, null);
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder)));
+=======
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'record': "+ unionIndex0));
             }
         }
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (decoder));
         return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
     }
 
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -86,10 +112,17 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
         return subRecord;
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, Decoder decoder)
         throws IOException
     {
         FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder)));
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         int unionIndex2 = (decoder.readIndex());
         if (unionIndex2 == 0) {
             decoder.readNull();
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
index b182d68f0..fe80ec8b6 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
@@ -6,6 +6,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -38,6 +42,7 @@ public FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeseri
         this.subRecordArray0 = readerSchema.getField("subRecordArray").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -45,6 +50,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
@@ -71,6 +85,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipR
                 throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex0));
             }
         }
+<<<<<<< HEAD
         populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (decoder));
@@ -78,6 +93,15 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipR
     }
 
     private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, Decoder decoder)
+=======
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -110,7 +134,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedFiel
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -119,7 +147,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedFiel
             FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, null);
         } else {
             if (unionIndex3 == 1) {
+<<<<<<< HEAD
                 FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder)));
+=======
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex3));
             }
@@ -127,6 +159,7 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedFiel
         Map<Utf8, IndexedRecord> subRecordMap1 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
             Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
             if (oldMap0 instanceof Map) {
@@ -137,21 +170,53 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedFiel
                 subRecordMap1 = subRecordMapReuse0;
             } else {
                 subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
+                if (oldMap0 instanceof Map) {
+                    subRecordMapReuse0 = ((Map) oldMap0);
+                }
+                if (subRecordMapReuse0 != (null)) {
+                    subRecordMapReuse0 .clear();
+                    subRecordMap1 = subRecordMapReuse0;
+                } else {
+                    subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder)));
+=======
+                    subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), 0));
+            } else {
+                subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(3, subRecordMap1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -178,11 +243,19 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
                 throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex4));
             }
         }
+<<<<<<< HEAD
         populate_subRecord0((subRecord), (decoder));
         return subRecord;
     }
 
     private void populate_subRecord0(IndexedRecord subRecord, Decoder decoder)
+=======
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -215,7 +288,11 @@ private void populate_subRecord0(IndexedRecord subRecord, Decoder decoder)
         }
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, Decoder decoder)
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<IndexedRecord> subRecordArray1 = null;
@@ -237,7 +314,11 @@ private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedFiel
                 if (oldArray0 instanceof GenericArray) {
                     subRecordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
                 }
+<<<<<<< HEAD
                 subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder)));
+=======
+                subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen1 = (decoder.arrayNext());
         }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
index a3b080ec2..4d2c487d9 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_Generi
         this.subRecord0 = readerSchema.getField("subRecord").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
@@ -35,11 +49,19 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipR
         } else {
             FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
         }
+<<<<<<< HEAD
         FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder)));
         return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
     }
 
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder), (customization)));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -56,6 +78,7 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
             charSequence0 = (decoder).readString(null);
         }
         subRecord.put(0, charSequence0);
+<<<<<<< HEAD
         populate_subRecord0((subRecord), (decoder));
         populate_subRecord1((subRecord), (decoder));
         return subRecord;
@@ -65,19 +88,38 @@ private void populate_subRecord0(IndexedRecord subRecord, Decoder decoder)
         throws IOException
     {
         deserializesubSubRecord0(null, (decoder));
+=======
+        populate_subRecord0((subRecord), (customization), (decoder));
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubSubRecord0(null, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         int unionIndex0 = (decoder.readIndex());
         if (unionIndex0 == 0) {
             decoder.readNull();
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 deserializesubSubRecord0(null, (decoder));
+=======
+                deserializesubSubRecord0(null, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'test3': "+ unionIndex0));
             }
         }
     }
 
+<<<<<<< HEAD
     public void deserializesubSubRecord0(Object reuse, Decoder decoder)
+=======
+    public void deserializesubSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         decoder.skipString();
@@ -90,7 +132,11 @@ private void populate_subSubRecord0(Decoder decoder)
         decoder.skipString();
     }
 
+<<<<<<< HEAD
     private void populate_subRecord1(IndexedRecord subRecord, Decoder decoder)
+=======
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Utf8 charSequence1;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
index 1dbe788a8..363407c56 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeser
         this.subRecord10 = readerSchema.getField("subRecord1").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
@@ -35,6 +49,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipR
         } else {
             FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
         }
+<<<<<<< HEAD
         FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder)));
         populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (decoder));
         populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (decoder));
@@ -42,6 +57,15 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipR
     }
 
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -58,11 +82,19 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
             charSequence0 = (decoder).readString(null);
         }
         subRecord.put(0, charSequence0);
+<<<<<<< HEAD
         populate_subRecord0((subRecord), (decoder));
         return subRecord;
     }
 
     private void populate_subRecord0(IndexedRecord subRecord, Decoder decoder)
+=======
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Utf8 charSequence1;
@@ -75,23 +107,38 @@ private void populate_subRecord0(IndexedRecord subRecord, Decoder decoder)
         subRecord.put(1, charSequence1);
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, Decoder decoder)
         throws IOException
     {
         deserializesubRecord20(null, (decoder));
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubRecord20(null, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         int unionIndex0 = (decoder.readIndex());
         if (unionIndex0 == 0) {
             decoder.readNull();
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 deserializesubRecord20(null, (decoder));
+=======
+                deserializesubRecord20(null, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecord3': "+ unionIndex0));
             }
         }
     }
 
+<<<<<<< HEAD
     public void deserializesubRecord20(Object reuse, Decoder decoder)
+=======
+    public void deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         decoder.skipString();
@@ -104,10 +151,17 @@ private void populate_subRecord20(Decoder decoder)
         decoder.skipString();
     }
 
+<<<<<<< HEAD
     private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, Decoder decoder)
         throws IOException
     {
         FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder)));
+=======
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
     }
 
 }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
index 40ce3a8f4..375a59539 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroW
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
index dcbf3aaa9..85e412266 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroW
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
index a841e7942..a514374ad 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -21,6 +25,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroW
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -28,6 +33,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
index 4adcd2f6a..836abfa16 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroW
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
index b5db9075a..63362ac42 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatInc
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
index 4bd5a62ec..a5bf3b963 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatInc
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
index 3f462b93c..07d7842f7 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatInc
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
index 6d0e1eeba..3b0a82784 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatInc
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
index b929b35ca..90a943fc5 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,6 +27,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArr
         this.testOptionSchema0 = test0 .getTypes().get(0);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
index 2ad99bbcf..fcddcf865 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,6 +27,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArr
         this.testOptionSchema0 = test0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
index c45ea3074..9098d8a03 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,6 +27,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArr
         this.testOptionSchema0 = test0 .getTypes().get(0);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
index f7f8ff362..7fb19c840 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,6 +27,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArr
         this.testOptionSchema0 = test0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
index 38eca98bb..4bffbdc62 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,6 +28,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMap
         this.testOptionSchema0 = test0 .getTypes().get(0);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -31,6 +36,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
@@ -44,6 +58,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
             Map<Utf8, Integer> testOption0 = null;
             long chunkLen0 = (decoder.readMapStart());
             if (chunkLen0 > 0) {
+<<<<<<< HEAD
                 Map<Utf8, Integer> testOptionReuse0 = null;
                 Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
                 if (oldMap0 instanceof Map) {
@@ -54,6 +69,22 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                     testOption0 = testOptionReuse0;
                 } else {
                     testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 do {
                     for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -63,7 +94,15 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                     chunkLen0 = (decoder.mapNext());
                 } while (chunkLen0 > 0);
             } else {
+<<<<<<< HEAD
                 testOption0 = new HashMap<Utf8, Integer>(0);
+=======
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
         } else {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
index ab3e738c1..b98347eb4 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,6 +28,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMap
         this.testOptionSchema0 = test0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -31,6 +36,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
@@ -44,6 +58,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
             Map<Utf8, Integer> testOption0 = null;
             long chunkLen0 = (decoder.readMapStart());
             if (chunkLen0 > 0) {
+<<<<<<< HEAD
                 Map<Utf8, Integer> testOptionReuse0 = null;
                 Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
                 if (oldMap0 instanceof Map) {
@@ -54,6 +69,22 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                     testOption0 = testOptionReuse0;
                 } else {
                     testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 do {
                     for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -63,7 +94,15 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                     chunkLen0 = (decoder.mapNext());
                 } while (chunkLen0 > 0);
             } else {
+<<<<<<< HEAD
                 testOption0 = new HashMap<Utf8, Integer>(0);
+=======
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
         } else {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
index 24afa6132..cc69512c9 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,6 +28,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMap
         this.testOptionSchema0 = test0 .getTypes().get(0);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -31,6 +36,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
@@ -48,6 +62,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                 Map<Utf8, Integer> testOption0 = null;
                 long chunkLen0 = (decoder.readMapStart());
                 if (chunkLen0 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, Integer> testOptionReuse0 = null;
                     Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
                     if (oldMap0 instanceof Map) {
@@ -58,6 +73,22 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                         testOption0 = testOptionReuse0;
                     } else {
                         testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -67,7 +98,15 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                         chunkLen0 = (decoder.mapNext());
                     } while (chunkLen0 > 0);
                 } else {
+<<<<<<< HEAD
                     testOption0 = new HashMap<Utf8, Integer>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
             } else {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
index d8f33bee4..8c849566f 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,6 +28,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMap
         this.testOptionSchema0 = test0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -31,6 +36,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
@@ -48,6 +62,7 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                 Map<Utf8, Integer> testOption0 = null;
                 long chunkLen0 = (decoder.readMapStart());
                 if (chunkLen0 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, Integer> testOptionReuse0 = null;
                     Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
                     if (oldMap0 instanceof Map) {
@@ -58,6 +73,22 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                         testOption0 = testOptionReuse0;
                     } else {
                         testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -67,7 +98,15 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
                         chunkLen0 = (decoder.mapNext());
                     } while (chunkLen0 > 0);
                 } else {
+<<<<<<< HEAD
                     testOption0 = new HashMap<Utf8, Integer>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
             } else {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
index dc777524f..aa31a1b9b 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -19,6 +23,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNon
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -26,6 +31,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
index 59de773cc..adefee7b7 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -19,6 +23,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNon
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -26,6 +31,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
index 1ad916d09..8f0b56556 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -19,6 +23,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNon
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -26,6 +31,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
index 619e27298..c26771e8c 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -19,6 +23,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNon
         this.test0 = readerSchema.getField("test").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -26,6 +31,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
index a80ceb4d9..0a2013469 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -23,6 +27,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSub
         this.testOptionSchema1 = test0 .getTypes().get(2);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
@@ -44,10 +58,17 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
             FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder)));
             } else {
                 if (unionIndex0 == 2) {
                     FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder)));
+=======
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 } else {
                     throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
                 }
@@ -56,7 +77,11 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
         return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord1;
@@ -69,7 +94,11 @@ public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder)
         return subRecord1;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord2;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
index 0f3d81197..5d8b7651a 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -23,6 +27,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSub
         this.testOptionSchema1 = test0 .getTypes().get(0);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
@@ -44,10 +58,17 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
             FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder)));
             } else {
                 if (unionIndex0 == 2) {
                     FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder)));
+=======
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 } else {
                     throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
                 }
@@ -56,7 +77,11 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
         return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord1;
@@ -69,7 +94,11 @@ public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder)
         return subRecord1;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord2;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
index a8492834e..436786b9e 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -23,6 +27,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSub
         this.testOptionSchema1 = test0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
@@ -40,10 +54,17 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
         }
         int unionIndex0 = (decoder.readIndex());
         if (unionIndex0 == 0) {
+<<<<<<< HEAD
             FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder)));
         } else {
             if (unionIndex0 == 1) {
                 FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder)));
+=======
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex0 == 2) {
                     decoder.readNull();
@@ -56,7 +77,11 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
         return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord2;
@@ -69,7 +94,11 @@ public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder)
         return subRecord2;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord1;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
index bcf251fac..310dc1568 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -23,6 +27,7 @@ public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSub
         this.testOptionSchema1 = test0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
@@ -40,10 +54,17 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
         }
         int unionIndex0 = (decoder.readIndex());
         if (unionIndex0 == 0) {
+<<<<<<< HEAD
             FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder)));
         } else {
             if (unionIndex0 == 1) {
                 FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder)));
+=======
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex0 == 2) {
                     decoder.readNull();
@@ -56,7 +77,11 @@ public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldToler
         return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord2;
@@ -69,7 +94,11 @@ public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder)
         return subRecord2;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord1;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java
index 92c7ae145..5ae0cd14a 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java
@@ -7,6 +7,10 @@
 import java.time.LocalTime;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Conversions;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
@@ -41,6 +45,7 @@ public FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053(Sche
         this.arrayOfUnionOfDateAndTimestampMillisElemOptionSchema1 = arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -48,6 +53,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastSerdeLogicalTypesDefined0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesDefined0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesDefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastSerdeLogicalTypesDefined;
@@ -58,11 +72,19 @@ public IndexedRecord deserializeFastSerdeLogicalTypesDefined0(Object reuse, Deco
         }
         LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
         FastSerdeLogicalTypesDefined.put(0, convertedValue0);
+<<<<<<< HEAD
         populate_FastSerdeLogicalTypesDefined0((FastSerdeLogicalTypesDefined), (decoder));
         return FastSerdeLogicalTypesDefined;
     }
 
     private void populate_FastSerdeLogicalTypesDefined0(IndexedRecord FastSerdeLogicalTypesDefined, Decoder decoder)
+=======
+        populate_FastSerdeLogicalTypesDefined0((FastSerdeLogicalTypesDefined), (customization), (decoder));
+        return FastSerdeLogicalTypesDefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesDefined0(IndexedRecord FastSerdeLogicalTypesDefined, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java
index f2e24de40..09050bef8 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java
@@ -8,6 +8,10 @@
 import java.util.ArrayList;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Conversions;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
@@ -29,6 +33,7 @@ public FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053(Sch
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined reuse, Decoder decoder)
         throws IOException
     {
@@ -36,6 +41,15 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined d
     }
 
     public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined deserializeFastSerdeLogicalTypesDefined0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesDefined0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined deserializeFastSerdeLogicalTypesDefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined FastSerdeLogicalTypesDefined;
@@ -46,11 +60,19 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined d
         }
         LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
         FastSerdeLogicalTypesDefined.put(0, convertedValue0);
+<<<<<<< HEAD
         populate_FastSerdeLogicalTypesDefined0((FastSerdeLogicalTypesDefined), (decoder));
         return FastSerdeLogicalTypesDefined;
     }
 
     private void populate_FastSerdeLogicalTypesDefined0(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined FastSerdeLogicalTypesDefined, Decoder decoder)
+=======
+        populate_FastSerdeLogicalTypesDefined0((FastSerdeLogicalTypesDefined), (customization), (decoder));
+        return FastSerdeLogicalTypesDefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesDefined0(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined FastSerdeLogicalTypesDefined, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java
index 9c4484277..8cd2a3fc3 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java
@@ -13,6 +13,10 @@
 import java.util.Map;
 import java.util.UUID;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Conversions;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -113,6 +117,7 @@ public FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890(Sche
         this.unionOfDateAndLocalTimestampOptionSchema1 = unionOfDateAndLocalTimestamp0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -120,6 +125,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastSerdeLogicalTypesTest10(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesTest10((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastSerdeLogicalTypesTest1;
@@ -152,6 +166,7 @@ public IndexedRecord deserializeFastSerdeLogicalTypesTest10(Object reuse, Decode
                 Map<Utf8, LocalDate> unionOfArrayAndMapOption1 = null;
                 long chunkLen1 = (decoder.readMapStart());
                 if (chunkLen1 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, LocalDate> unionOfArrayAndMapOptionReuse0 = null;
                     Object oldMap0 = FastSerdeLogicalTypesTest1 .get(0);
                     if (oldMap0 instanceof Map) {
@@ -162,6 +177,22 @@ public IndexedRecord deserializeFastSerdeLogicalTypesTest10(Object reuse, Decode
                         unionOfArrayAndMapOption1 = unionOfArrayAndMapOptionReuse0;
                     } else {
                         unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, LocalDate> unionOfArrayAndMapOptionReuse0 = null;
+                        Object oldMap0 = FastSerdeLogicalTypesTest1 .get(0);
+                        if (oldMap0 instanceof Map) {
+                            unionOfArrayAndMapOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (unionOfArrayAndMapOptionReuse0 != (null)) {
+                            unionOfArrayAndMapOptionReuse0 .clear();
+                            unionOfArrayAndMapOption1 = unionOfArrayAndMapOptionReuse0;
+                        } else {
+                            unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
@@ -172,13 +203,22 @@ public IndexedRecord deserializeFastSerdeLogicalTypesTest10(Object reuse, Decode
                         chunkLen1 = (decoder.mapNext());
                     } while (chunkLen1 > 0);
                 } else {
+<<<<<<< HEAD
                     unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), 0));
+                    } else {
+                        unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption1);
             } else {
                 throw new RuntimeException(("Illegal union index for 'unionOfArrayAndMap': "+ unionIndex0));
             }
         }
+<<<<<<< HEAD
         populate_FastSerdeLogicalTypesTest10((FastSerdeLogicalTypesTest1), (decoder));
         populate_FastSerdeLogicalTypesTest11((FastSerdeLogicalTypesTest1), (decoder));
         populate_FastSerdeLogicalTypesTest12((FastSerdeLogicalTypesTest1), (decoder));
@@ -189,11 +229,24 @@ public IndexedRecord deserializeFastSerdeLogicalTypesTest10(Object reuse, Decode
     }
 
     private void populate_FastSerdeLogicalTypesTest10(IndexedRecord FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+        populate_FastSerdeLogicalTypesTest10((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest11((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest12((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest13((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest14((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest15((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        return FastSerdeLogicalTypesTest1;
+    }
+
+    private void populate_FastSerdeLogicalTypesTest10(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillis1 = null;
         long chunkLen2 = (decoder.readMapStart());
         if (chunkLen2 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillisReuse0 = null;
             Object oldMap1 = FastSerdeLogicalTypesTest1 .get(1);
             if (oldMap1 instanceof Map) {
@@ -204,6 +257,22 @@ private void populate_FastSerdeLogicalTypesTest10(IndexedRecord FastSerdeLogical
                 mapOfUnionsOfDateAndTimestampMillis1 = mapOfUnionsOfDateAndTimestampMillisReuse0;
             } else {
                 mapOfUnionsOfDateAndTimestampMillis1 = new HashMap<Utf8, Object>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillisReuse0 = null;
+                Object oldMap1 = FastSerdeLogicalTypesTest1 .get(1);
+                if (oldMap1 instanceof Map) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 = ((Map) oldMap1);
+                }
+                if (mapOfUnionsOfDateAndTimestampMillisReuse0 != (null)) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 .clear();
+                    mapOfUnionsOfDateAndTimestampMillis1 = mapOfUnionsOfDateAndTimestampMillisReuse0;
+                } else {
+                    mapOfUnionsOfDateAndTimestampMillis1 = new HashMap<Utf8, Object>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
@@ -224,12 +293,21 @@ private void populate_FastSerdeLogicalTypesTest10(IndexedRecord FastSerdeLogical
                 chunkLen2 = (decoder.mapNext());
             } while (chunkLen2 > 0);
         } else {
+<<<<<<< HEAD
             mapOfUnionsOfDateAndTimestampMillis1 = new HashMap<Utf8, Object>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), 0));
+            } else {
+                mapOfUnionsOfDateAndTimestampMillis1 = new HashMap<Utf8, Object>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastSerdeLogicalTypesTest1 .put(1, mapOfUnionsOfDateAndTimestampMillis1);
         Map<Utf8, Instant> timestampMillisMap1 = null;
         long chunkLen3 = (decoder.readMapStart());
         if (chunkLen3 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Instant> timestampMillisMapReuse0 = null;
             Object oldMap2 = FastSerdeLogicalTypesTest1 .get(2);
             if (oldMap2 instanceof Map) {
@@ -240,6 +318,22 @@ private void populate_FastSerdeLogicalTypesTest10(IndexedRecord FastSerdeLogical
                 timestampMillisMap1 = timestampMillisMapReuse0;
             } else {
                 timestampMillisMap1 = new HashMap<Utf8, Instant>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), ((int) chunkLen3)));
+            } else {
+                Map<Utf8, Instant> timestampMillisMapReuse0 = null;
+                Object oldMap2 = FastSerdeLogicalTypesTest1 .get(2);
+                if (oldMap2 instanceof Map) {
+                    timestampMillisMapReuse0 = ((Map) oldMap2);
+                }
+                if (timestampMillisMapReuse0 != (null)) {
+                    timestampMillisMapReuse0 .clear();
+                    timestampMillisMap1 = timestampMillisMapReuse0;
+                } else {
+                    timestampMillisMap1 = new HashMap<Utf8, Instant>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
@@ -250,12 +344,24 @@ private void populate_FastSerdeLogicalTypesTest10(IndexedRecord FastSerdeLogical
                 chunkLen3 = (decoder.mapNext());
             } while (chunkLen3 > 0);
         } else {
+<<<<<<< HEAD
             timestampMillisMap1 = new HashMap<Utf8, Instant>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), 0));
+            } else {
+                timestampMillisMap1 = new HashMap<Utf8, Instant>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastSerdeLogicalTypesTest1 .put(2, timestampMillisMap1);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest11(IndexedRecord FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest11(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -304,7 +410,11 @@ private void populate_FastSerdeLogicalTypesTest11(IndexedRecord FastSerdeLogical
         FastSerdeLogicalTypesTest1 .put(4, arrayOfDates0);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest12(IndexedRecord FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest12(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -337,7 +447,11 @@ private void populate_FastSerdeLogicalTypesTest12(IndexedRecord FastSerdeLogical
         FastSerdeLogicalTypesTest1 .put(6, convertedValue9);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest13(IndexedRecord FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest13(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Instant convertedValue10 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
@@ -346,7 +460,11 @@ private void populate_FastSerdeLogicalTypesTest13(IndexedRecord FastSerdeLogical
         FastSerdeLogicalTypesTest1 .put(8, convertedValue11);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest14(IndexedRecord FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest14(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         LocalTime convertedValue12 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
@@ -355,15 +473,26 @@ private void populate_FastSerdeLogicalTypesTest14(IndexedRecord FastSerdeLogical
         FastSerdeLogicalTypesTest1 .put(10, convertedValue13);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest15(IndexedRecord FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest15(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         LocalDate convertedValue14 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
         FastSerdeLogicalTypesTest1 .put(11, convertedValue14);
+<<<<<<< HEAD
         FastSerdeLogicalTypesTest1 .put(12, deserializeLocalTimestampRecord0(FastSerdeLogicalTypesTest1 .get(12), (decoder)));
     }
 
     public IndexedRecord deserializeLocalTimestampRecord0(Object reuse, Decoder decoder)
+=======
+        FastSerdeLogicalTypesTest1 .put(12, deserializeLocalTimestampRecord0(FastSerdeLogicalTypesTest1 .get(12), (decoder), (customization)));
+    }
+
+    public IndexedRecord deserializeLocalTimestampRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord LocalTimestampRecord;
@@ -374,12 +503,21 @@ public IndexedRecord deserializeLocalTimestampRecord0(Object reuse, Decoder deco
         }
         LocalDateTime convertedValue15 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
         LocalTimestampRecord.put(0, convertedValue15);
+<<<<<<< HEAD
         populate_LocalTimestampRecord0((LocalTimestampRecord), (decoder));
         populate_LocalTimestampRecord1((LocalTimestampRecord), (decoder));
         return LocalTimestampRecord;
     }
 
     private void populate_LocalTimestampRecord0(IndexedRecord LocalTimestampRecord, Decoder decoder)
+=======
+        populate_LocalTimestampRecord0((LocalTimestampRecord), (customization), (decoder));
+        populate_LocalTimestampRecord1((LocalTimestampRecord), (customization), (decoder));
+        return LocalTimestampRecord;
+    }
+
+    private void populate_LocalTimestampRecord0(IndexedRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -413,7 +551,11 @@ private void populate_LocalTimestampRecord0(IndexedRecord LocalTimestampRecord,
         }
     }
 
+<<<<<<< HEAD
     private void populate_LocalTimestampRecord1(IndexedRecord LocalTimestampRecord, Decoder decoder)
+=======
+    private void populate_LocalTimestampRecord1(IndexedRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java
index 6a1f80d32..bcd499f9c 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java
@@ -14,6 +14,10 @@
 import java.util.Map;
 import java.util.UUID;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Conversions;
 import org.apache.avro.Schema;
 import org.apache.avro.io.Decoder;
@@ -45,6 +49,7 @@ public FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890(Sch
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 reuse, Decoder decoder)
         throws IOException
     {
@@ -52,6 +57,15 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 des
     }
 
     public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 deserializeFastSerdeLogicalTypesTest10(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 deserializeFastSerdeLogicalTypesTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1;
@@ -84,6 +98,7 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 des
                 Map<Utf8, LocalDate> unionOfArrayAndMapOption1 = null;
                 long chunkLen1 = (decoder.readMapStart());
                 if (chunkLen1 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, LocalDate> unionOfArrayAndMapOptionReuse0 = null;
                     Object oldMap0 = FastSerdeLogicalTypesTest1 .get(0);
                     if (oldMap0 instanceof Map) {
@@ -94,6 +109,22 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 des
                         unionOfArrayAndMapOption1 = unionOfArrayAndMapOptionReuse0;
                     } else {
                         unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, LocalDate> unionOfArrayAndMapOptionReuse0 = null;
+                        Object oldMap0 = FastSerdeLogicalTypesTest1 .get(0);
+                        if (oldMap0 instanceof Map) {
+                            unionOfArrayAndMapOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (unionOfArrayAndMapOptionReuse0 != (null)) {
+                            unionOfArrayAndMapOptionReuse0 .clear();
+                            unionOfArrayAndMapOption1 = unionOfArrayAndMapOptionReuse0;
+                        } else {
+                            unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
@@ -104,13 +135,22 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 des
                         chunkLen1 = (decoder.mapNext());
                     } while (chunkLen1 > 0);
                 } else {
+<<<<<<< HEAD
                     unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), 0));
+                    } else {
+                        unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption1);
             } else {
                 throw new RuntimeException(("Illegal union index for 'unionOfArrayAndMap': "+ unionIndex0));
             }
         }
+<<<<<<< HEAD
         populate_FastSerdeLogicalTypesTest10((FastSerdeLogicalTypesTest1), (decoder));
         populate_FastSerdeLogicalTypesTest11((FastSerdeLogicalTypesTest1), (decoder));
         populate_FastSerdeLogicalTypesTest12((FastSerdeLogicalTypesTest1), (decoder));
@@ -121,11 +161,24 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 des
     }
 
     private void populate_FastSerdeLogicalTypesTest10(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+        populate_FastSerdeLogicalTypesTest10((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest11((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest12((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest13((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest14((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest15((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        return FastSerdeLogicalTypesTest1;
+    }
+
+    private void populate_FastSerdeLogicalTypesTest10(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillis0 = null;
         long chunkLen2 = (decoder.readMapStart());
         if (chunkLen2 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillisReuse0 = null;
             Object oldMap1 = FastSerdeLogicalTypesTest1 .get(1);
             if (oldMap1 instanceof Map) {
@@ -136,6 +189,22 @@ private void populate_FastSerdeLogicalTypesTest10(com.linkedin.avro.fastserde.ge
                 mapOfUnionsOfDateAndTimestampMillis0 = mapOfUnionsOfDateAndTimestampMillisReuse0;
             } else {
                 mapOfUnionsOfDateAndTimestampMillis0 = new HashMap<Utf8, Object>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillisReuse0 = null;
+                Object oldMap1 = FastSerdeLogicalTypesTest1 .get(1);
+                if (oldMap1 instanceof Map) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 = ((Map) oldMap1);
+                }
+                if (mapOfUnionsOfDateAndTimestampMillisReuse0 != (null)) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 .clear();
+                    mapOfUnionsOfDateAndTimestampMillis0 = mapOfUnionsOfDateAndTimestampMillisReuse0;
+                } else {
+                    mapOfUnionsOfDateAndTimestampMillis0 = new HashMap<Utf8, Object>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
@@ -156,12 +225,21 @@ private void populate_FastSerdeLogicalTypesTest10(com.linkedin.avro.fastserde.ge
                 chunkLen2 = (decoder.mapNext());
             } while (chunkLen2 > 0);
         } else {
+<<<<<<< HEAD
             mapOfUnionsOfDateAndTimestampMillis0 = new HashMap<Utf8, Object>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), 0));
+            } else {
+                mapOfUnionsOfDateAndTimestampMillis0 = new HashMap<Utf8, Object>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastSerdeLogicalTypesTest1 .put(1, mapOfUnionsOfDateAndTimestampMillis0);
         Map<Utf8, Instant> timestampMillisMap0 = null;
         long chunkLen3 = (decoder.readMapStart());
         if (chunkLen3 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Instant> timestampMillisMapReuse0 = null;
             Object oldMap2 = FastSerdeLogicalTypesTest1 .get(2);
             if (oldMap2 instanceof Map) {
@@ -172,6 +250,22 @@ private void populate_FastSerdeLogicalTypesTest10(com.linkedin.avro.fastserde.ge
                 timestampMillisMap0 = timestampMillisMapReuse0;
             } else {
                 timestampMillisMap0 = new HashMap<Utf8, Instant>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), ((int) chunkLen3)));
+            } else {
+                Map<Utf8, Instant> timestampMillisMapReuse0 = null;
+                Object oldMap2 = FastSerdeLogicalTypesTest1 .get(2);
+                if (oldMap2 instanceof Map) {
+                    timestampMillisMapReuse0 = ((Map) oldMap2);
+                }
+                if (timestampMillisMapReuse0 != (null)) {
+                    timestampMillisMapReuse0 .clear();
+                    timestampMillisMap0 = timestampMillisMapReuse0;
+                } else {
+                    timestampMillisMap0 = new HashMap<Utf8, Instant>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
@@ -182,12 +276,24 @@ private void populate_FastSerdeLogicalTypesTest10(com.linkedin.avro.fastserde.ge
                 chunkLen3 = (decoder.mapNext());
             } while (chunkLen3 > 0);
         } else {
+<<<<<<< HEAD
             timestampMillisMap0 = new HashMap<Utf8, Instant>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), 0));
+            } else {
+                timestampMillisMap0 = new HashMap<Utf8, Instant>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastSerdeLogicalTypesTest1 .put(2, timestampMillisMap0);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest11(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest11(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -236,7 +342,11 @@ private void populate_FastSerdeLogicalTypesTest11(com.linkedin.avro.fastserde.ge
         FastSerdeLogicalTypesTest1 .put(4, arrayOfDates0);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest12(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest12(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -269,7 +379,11 @@ private void populate_FastSerdeLogicalTypesTest12(com.linkedin.avro.fastserde.ge
         FastSerdeLogicalTypesTest1 .put(6, convertedValue9);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest13(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest13(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Instant convertedValue10 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
@@ -278,7 +392,11 @@ private void populate_FastSerdeLogicalTypesTest13(com.linkedin.avro.fastserde.ge
         FastSerdeLogicalTypesTest1 .put(8, convertedValue11);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest14(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest14(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         LocalTime convertedValue12 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
@@ -287,15 +405,26 @@ private void populate_FastSerdeLogicalTypesTest14(com.linkedin.avro.fastserde.ge
         FastSerdeLogicalTypesTest1 .put(10, convertedValue13);
     }
 
+<<<<<<< HEAD
     private void populate_FastSerdeLogicalTypesTest15(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, Decoder decoder)
+=======
+    private void populate_FastSerdeLogicalTypesTest15(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         LocalDate convertedValue14 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
         FastSerdeLogicalTypesTest1 .put(11, convertedValue14);
+<<<<<<< HEAD
         FastSerdeLogicalTypesTest1 .put(12, deserializeLocalTimestampRecord0(FastSerdeLogicalTypesTest1 .get(12), (decoder)));
     }
 
     public com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord deserializeLocalTimestampRecord0(Object reuse, Decoder decoder)
+=======
+        FastSerdeLogicalTypesTest1 .put(12, deserializeLocalTimestampRecord0(FastSerdeLogicalTypesTest1 .get(12), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord deserializeLocalTimestampRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord;
@@ -306,12 +435,21 @@ public com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord deseriali
         }
         LocalDateTime convertedValue15 = ((LocalDateTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis));
         LocalTimestampRecord.put(0, convertedValue15);
+<<<<<<< HEAD
         populate_LocalTimestampRecord0((LocalTimestampRecord), (decoder));
         populate_LocalTimestampRecord1((LocalTimestampRecord), (decoder));
         return LocalTimestampRecord;
     }
 
     private void populate_LocalTimestampRecord0(com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord, Decoder decoder)
+=======
+        populate_LocalTimestampRecord0((LocalTimestampRecord), (customization), (decoder));
+        populate_LocalTimestampRecord1((LocalTimestampRecord), (customization), (decoder));
+        return LocalTimestampRecord;
+    }
+
+    private void populate_LocalTimestampRecord0(com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -345,7 +483,11 @@ private void populate_LocalTimestampRecord0(com.linkedin.avro.fastserde.generate
         }
     }
 
+<<<<<<< HEAD
     private void populate_LocalTimestampRecord1(com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord, Decoder decoder)
+=======
+    private void populate_LocalTimestampRecord1(com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java
index 563d4cdad..404ba053d 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,6 +27,7 @@ public FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418(
         this.arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 = arrayOfUnionOfDateAndTimestampMillis0 .getElementType();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastSerdeLogicalTypesUndefined0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesUndefined0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesUndefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastSerdeLogicalTypesUndefined;
@@ -39,11 +53,19 @@ public IndexedRecord deserializeFastSerdeLogicalTypesUndefined0(Object reuse, De
             FastSerdeLogicalTypesUndefined = new org.apache.avro.generic.GenericData.Record(readerSchema);
         }
         FastSerdeLogicalTypesUndefined.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_FastSerdeLogicalTypesUndefined0((FastSerdeLogicalTypesUndefined), (decoder));
         return FastSerdeLogicalTypesUndefined;
     }
 
     private void populate_FastSerdeLogicalTypesUndefined0(IndexedRecord FastSerdeLogicalTypesUndefined, Decoder decoder)
+=======
+        populate_FastSerdeLogicalTypesUndefined0((FastSerdeLogicalTypesUndefined), (customization), (decoder));
+        return FastSerdeLogicalTypesUndefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesUndefined0(IndexedRecord FastSerdeLogicalTypesUndefined, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         FastSerdeLogicalTypesUndefined.put(1, (decoder.readInt()));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java
index b386cfaa2..d09a6ea5f 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java
@@ -5,6 +5,10 @@
 import java.util.ArrayList;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.io.Decoder;
@@ -19,6 +23,7 @@ public FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined reuse, Decoder decoder)
         throws IOException
     {
@@ -26,6 +31,15 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined
     }
 
     public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined deserializeFastSerdeLogicalTypesUndefined0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesUndefined0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined deserializeFastSerdeLogicalTypesUndefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined FastSerdeLogicalTypesUndefined;
@@ -35,11 +49,19 @@ public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined
             FastSerdeLogicalTypesUndefined = new com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined();
         }
         FastSerdeLogicalTypesUndefined.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_FastSerdeLogicalTypesUndefined0((FastSerdeLogicalTypesUndefined), (decoder));
         return FastSerdeLogicalTypesUndefined;
     }
 
     private void populate_FastSerdeLogicalTypesUndefined0(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined FastSerdeLogicalTypesUndefined, Decoder decoder)
+=======
+        populate_FastSerdeLogicalTypesUndefined0((FastSerdeLogicalTypesUndefined), (customization), (decoder));
+        return FastSerdeLogicalTypesUndefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesUndefined0(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined FastSerdeLogicalTypesUndefined, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         FastSerdeLogicalTypesUndefined.put(1, (decoder.readInt()));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
index f9c9f4cec..c47814759 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
@@ -6,6 +6,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -28,6 +32,7 @@ public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializ
         this.testStringMap0 = readerSchema.getField("testStringMap").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -35,6 +40,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
@@ -51,12 +65,21 @@ public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSch
             charSequence0 = (decoder).readString(null);
         }
         FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+<<<<<<< HEAD
         populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (decoder));
         populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (decoder));
         return FastStringableTest_javaStringPropertyInReaderSchemaTest;
     }
 
     private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, Decoder decoder)
+=======
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -109,12 +132,17 @@ private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(I
         FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
     }
 
+<<<<<<< HEAD
     private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, Decoder decoder)
+=======
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, Utf8> testStringMap1 = null;
         long chunkLen1 = (decoder.readMapStart());
         if (chunkLen1 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Utf8> testStringMapReuse0 = null;
             Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
             if (oldMap0 instanceof Map) {
@@ -125,6 +153,22 @@ private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(I
                 testStringMap1 = testStringMapReuse0;
             } else {
                 testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
@@ -135,7 +179,15 @@ private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(I
                 chunkLen1 = (decoder.mapNext());
             } while (chunkLen1 > 0);
         } else {
+<<<<<<< HEAD
             testStringMap1 = new HashMap<Utf8, Utf8>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
     }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
index 15d30a747..d96ca49f5 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
@@ -6,6 +6,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -27,6 +31,7 @@ public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializ
         this.testStringMap0 = readerSchema.getField("testStringMap").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -34,6 +39,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
@@ -44,12 +58,21 @@ public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSch
         }
         String charSequence0 = (decoder).readString();
         FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+<<<<<<< HEAD
         populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (decoder));
         populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (decoder));
         return FastStringableTest_javaStringPropertyInReaderSchemaTest;
     }
 
     private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, Decoder decoder)
+=======
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -91,12 +114,17 @@ private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(I
         FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
     }
 
+<<<<<<< HEAD
     private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, Decoder decoder)
+=======
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<String, String> testStringMap1 = null;
         long chunkLen1 = (decoder.readMapStart());
         if (chunkLen1 > 0) {
+<<<<<<< HEAD
             Map<String, String> testStringMapReuse0 = null;
             Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
             if (oldMap0 instanceof Map) {
@@ -107,6 +135,22 @@ private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(I
                 testStringMap1 = testStringMapReuse0;
             } else {
                 testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
@@ -117,7 +161,15 @@ private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(I
                 chunkLen1 = (decoder.mapNext());
             } while (chunkLen1 > 0);
         } else {
+<<<<<<< HEAD
             testStringMap1 = new HashMap<String, String>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
     }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
index ee0490bf6..1b6eb9c14 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
@@ -6,6 +6,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -27,6 +31,7 @@ public FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_
         this.testStringMap0 = readerSchema.getField("testStringMap").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -34,6 +39,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord FastStringableTest_javaStringPropertyTest;
@@ -44,12 +58,21 @@ public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Objec
         }
         String charSequence0 = (decoder).readString();
         FastStringableTest_javaStringPropertyTest.put(0, charSequence0);
+<<<<<<< HEAD
         populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (decoder));
         populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (decoder));
         return FastStringableTest_javaStringPropertyTest;
     }
 
     private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, Decoder decoder)
+=======
+        populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -91,12 +114,17 @@ private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord F
         FastStringableTest_javaStringPropertyTest.put(2, testStringArray1);
     }
 
+<<<<<<< HEAD
     private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, Decoder decoder)
+=======
+    private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<String, String> testStringMap1 = null;
         long chunkLen1 = (decoder.readMapStart());
         if (chunkLen1 > 0) {
+<<<<<<< HEAD
             Map<String, String> testStringMapReuse0 = null;
             Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
             if (oldMap0 instanceof Map) {
@@ -107,6 +135,22 @@ private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord F
                 testStringMap1 = testStringMapReuse0;
             } else {
                 testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
@@ -117,7 +161,15 @@ private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord F
                 chunkLen1 = (decoder.mapNext());
             } while (chunkLen1 > 0);
         } else {
+<<<<<<< HEAD
             testStringMap1 = new HashMap<String, String>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         FastStringableTest_javaStringPropertyTest.put(3, testStringMap1);
     }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
index 3e4b13f88..3379b8ac0 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
@@ -14,6 +14,10 @@
 import com.linkedin.avro.api.PrimitiveLongList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.TestEnum;
 import com.linkedin.avro.fastserde.generated.avro.TestFixed;
 import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
@@ -37,12 +41,17 @@ public Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978(Schema reade
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder)
+=======
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
             if ((reuse) instanceof Map) {
                 mapReuse0 = ((Map)(reuse));
@@ -52,21 +61,52 @@ public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserial
                 map0 = mapReuse0;
             } else {
                 map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     map0 .put(key0, deserializeTestRecord0(null, (decoder)));
+=======
+                    map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         return map0;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
@@ -76,6 +116,7 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
             TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
         }
         TestRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_TestRecord0((TestRecord), (decoder));
         populate_TestRecord1((TestRecord), (decoder));
         populate_TestRecord2((TestRecord), (decoder));
@@ -99,6 +140,31 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
     }
 
     private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -115,7 +181,11 @@ private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(2, (decoder.readLong()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -132,7 +202,11 @@ private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(4, (decoder.readDouble()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -149,7 +223,11 @@ private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(6, (decoder.readFloat()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -166,7 +244,11 @@ private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(8, (decoder.readBoolean()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -190,7 +272,11 @@ private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(10, byteBuffer0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -221,7 +307,11 @@ private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(12, charSequence0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
@@ -255,7 +345,11 @@ private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(14, testFixed1);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex7 = (decoder.readIndex());
@@ -315,7 +409,11 @@ private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(16, testFixedArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedUnionArray0 = null;
@@ -365,7 +463,11 @@ private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex9 = (decoder.readIndex());
@@ -401,7 +503,11 @@ private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(20, testEnumArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<TestEnum> testEnumUnionArray0 = null;
@@ -444,14 +550,22 @@ private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(22, null);
         } else {
             if (unionIndex11 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder)));
+=======
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
             }
         }
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
@@ -478,11 +592,19 @@ public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord
                 throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
             }
         }
+<<<<<<< HEAD
         populate_SubRecord0((SubRecord), (decoder));
         return SubRecord;
     }
 
     private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, Decoder decoder)
+=======
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex13 = (decoder.readIndex());
@@ -505,10 +627,17 @@ private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubR
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
         throws IOException
     {
         TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder)));
+=======
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
         long chunkLen5 = (decoder.readArrayStart());
         Object oldArray4 = TestRecord.get(24);
@@ -528,19 +657,28 @@ private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.Te
                 if (oldArray4 instanceof GenericArray) {
                     recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
                 }
+<<<<<<< HEAD
                 recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen5 = (decoder.arrayNext());
         }
         TestRecord.put(24, recordsArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
         long chunkLen6 = (decoder.readMapStart());
         if (chunkLen6 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
             Object oldMap0 = TestRecord.get(25);
             if (oldMap0 instanceof Map) {
@@ -551,16 +689,44 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMap0 = recordsMapReuse0;
             } else {
                 recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
                     Utf8 key1 = (decoder.readString(null));
+<<<<<<< HEAD
                     recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder)));
+=======
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen6 = (decoder.mapNext());
             } while (chunkLen6 > 0);
         } else {
+<<<<<<< HEAD
             recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(25, recordsMap0);
         int unionIndex14 = (decoder.readIndex());
@@ -594,7 +760,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                             recordsArrayUnionOption0 .add(null);
                         } else {
                             if (unionIndex15 == 1) {
+<<<<<<< HEAD
                                 recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder)));
+=======
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             } else {
                                 throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
                             }
@@ -609,7 +779,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex16 = (decoder.readIndex());
@@ -621,6 +795,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
                 long chunkLen8 = (decoder.readMapStart());
                 if (chunkLen8 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
                     Object oldMap1 = TestRecord.get(27);
                     if (oldMap1 instanceof Map) {
@@ -631,6 +806,22 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
                     } else {
                         recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
@@ -641,7 +832,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapUnionOption0 .put(key2, null);
                             } else {
                                 if (unionIndex17 == 1) {
+<<<<<<< HEAD
                                     recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
                                 }
@@ -650,7 +845,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen8 = (decoder.mapNext());
                     } while (chunkLen8 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(27, recordsMapUnionOption0);
             } else {
@@ -679,6 +882,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
                 long chunkLen10 = (decoder.readMapStart());
                 if (chunkLen10 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
                     if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
                         recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
@@ -688,6 +892,21 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsArrayMapElem0 = recordsArrayMapElemReuse0;
                     } else {
                         recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
@@ -698,7 +917,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapElem0 .put(key3, null);
                             } else {
                                 if (unionIndex18 == 1) {
+<<<<<<< HEAD
                                     recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
                                 }
@@ -707,7 +930,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen10 = (decoder.mapNext());
                     } while (chunkLen10 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 recordsArrayMap0 .add(recordsArrayMapElem0);
             }
@@ -716,12 +947,17 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(28, recordsArrayMap0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
         long chunkLen11 = (decoder.readMapStart());
         if (chunkLen11 > 0) {
+<<<<<<< HEAD
             Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
             Object oldMap2 = TestRecord.get(29);
             if (oldMap2 instanceof Map) {
@@ -732,6 +968,22 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMapArray0 = recordsMapArrayReuse0;
             } else {
                 recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
@@ -760,7 +1012,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapArrayValue0 .add(null);
                             } else {
                                 if (unionIndex19 == 1) {
+<<<<<<< HEAD
                                     recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder)));
+=======
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
                                 }
@@ -773,7 +1029,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 chunkLen11 = (decoder.mapNext());
             } while (chunkLen11 > 0);
         } else {
+<<<<<<< HEAD
             recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(29, recordsMapArray0);
         int unionIndex20 = (decoder.readIndex());
@@ -804,6 +1068,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
                         long chunkLen14 = (decoder.readMapStart());
                         if (chunkLen14 > 0) {
+<<<<<<< HEAD
                             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
                             if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
                                 recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
@@ -813,6 +1078,21 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
                             } else {
                                 recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                             do {
                                 for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
@@ -823,7 +1103,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsArrayMapUnionOptionElem0 .put(key5, null);
                                     } else {
                                         if (unionIndex21 == 1) {
+<<<<<<< HEAD
                                             recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder)));
+=======
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
                                         }
@@ -832,7 +1116,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 chunkLen14 = (decoder.mapNext());
                             } while (chunkLen14 > 0);
                         } else {
+<<<<<<< HEAD
                             recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
                     }
@@ -845,7 +1137,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex22 = (decoder.readIndex());
@@ -857,6 +1153,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
                 long chunkLen15 = (decoder.readMapStart());
                 if (chunkLen15 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
                     Object oldMap3 = TestRecord.get(31);
                     if (oldMap3 instanceof Map) {
@@ -867,6 +1164,22 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
                     } else {
                         recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
@@ -895,7 +1208,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsMapArrayUnionOptionValue0 .add(null);
                                     } else {
                                         if (unionIndex23 == 1) {
+<<<<<<< HEAD
                                             recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder)));
+=======
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
                                         }
@@ -908,7 +1225,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen15 = (decoder.mapNext());
                     } while (chunkLen15 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(31, recordsMapArrayUnionOption0);
             } else {
@@ -921,7 +1246,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(32, null);
         } else {
             if (unionIndex24 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder)));
+=======
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex24 == 2) {
                     Utf8 charSequence4;
@@ -943,7 +1272,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveBooleanList booleanArray0 = null;
@@ -980,7 +1313,11 @@ private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(34, doubleArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveFloatList floatArray0 = null;
@@ -1004,7 +1341,11 @@ private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(36, intArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveLongList longArray0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
index fa348963d..0f57f019e 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -26,12 +30,17 @@ public Map_of_UNION_GenericDeserializer_2140000109_2140000109(Schema readerSchem
         this.field0 = mapValueOptionSchema0 .getField("field").schema();
     }
 
+<<<<<<< HEAD
     public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder)
+=======
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, IndexedRecord> map0 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, IndexedRecord> mapReuse0 = null;
             if ((reuse) instanceof Map) {
                 mapReuse0 = ((Map)(reuse));
@@ -41,6 +50,21 @@ public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Deco
                 map0 = mapReuse0;
             } else {
                 map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -51,7 +75,11 @@ public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Deco
                         map0 .put(key0, null);
                     } else {
                         if (unionIndex0 == 1) {
+<<<<<<< HEAD
                             map0 .put(key0, deserializerecord0(null, (decoder)));
+=======
+                            map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         } else {
                             throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
                         }
@@ -60,12 +88,24 @@ public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Deco
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             map0 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         return map0;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_UNION_SpecificDeserializer_971650236_971650236.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
index a03953107..2698d5ebb 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
@@ -14,6 +14,10 @@
 import com.linkedin.avro.api.PrimitiveLongList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.TestEnum;
 import com.linkedin.avro.fastserde.generated.avro.TestFixed;
 import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
@@ -37,12 +41,17 @@ public Map_of_UNION_SpecificDeserializer_971650236_971650236(Schema readerSchema
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder)
+=======
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
             if ((reuse) instanceof Map) {
                 mapReuse0 = ((Map)(reuse));
@@ -52,6 +61,21 @@ public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserial
                 map0 = mapReuse0;
             } else {
                 map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -62,7 +86,11 @@ public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserial
                         map0 .put(key0, null);
                     } else {
                         if (unionIndex0 == 1) {
+<<<<<<< HEAD
                             map0 .put(key0, deserializeTestRecord0(null, (decoder)));
+=======
+                            map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         } else {
                             throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
                         }
@@ -71,12 +99,24 @@ public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserial
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         return map0;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
@@ -86,6 +126,7 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
             TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
         }
         TestRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_TestRecord0((TestRecord), (decoder));
         populate_TestRecord1((TestRecord), (decoder));
         populate_TestRecord2((TestRecord), (decoder));
@@ -109,6 +150,31 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
     }
 
     private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -125,7 +191,11 @@ private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(2, (decoder.readLong()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -142,7 +212,11 @@ private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(4, (decoder.readDouble()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -159,7 +233,11 @@ private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(6, (decoder.readFloat()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -176,7 +254,11 @@ private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(8, (decoder.readBoolean()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -200,7 +282,11 @@ private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(10, byteBuffer0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
@@ -231,7 +317,11 @@ private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(12, charSequence0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex7 = (decoder.readIndex());
@@ -265,7 +355,11 @@ private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(14, testFixed1);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex8 = (decoder.readIndex());
@@ -325,7 +419,11 @@ private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(16, testFixedArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedUnionArray0 = null;
@@ -375,7 +473,11 @@ private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex10 = (decoder.readIndex());
@@ -411,7 +513,11 @@ private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(20, testEnumArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<TestEnum> testEnumUnionArray0 = null;
@@ -454,14 +560,22 @@ private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(22, null);
         } else {
             if (unionIndex12 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder)));
+=======
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
             }
         }
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
@@ -488,11 +602,19 @@ public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord
                 throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
             }
         }
+<<<<<<< HEAD
         populate_SubRecord0((SubRecord), (decoder));
         return SubRecord;
     }
 
     private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, Decoder decoder)
+=======
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex14 = (decoder.readIndex());
@@ -515,10 +637,17 @@ private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubR
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
         throws IOException
     {
         TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder)));
+=======
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
         long chunkLen5 = (decoder.readArrayStart());
         Object oldArray4 = TestRecord.get(24);
@@ -538,19 +667,28 @@ private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.Te
                 if (oldArray4 instanceof GenericArray) {
                     recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
                 }
+<<<<<<< HEAD
                 recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen5 = (decoder.arrayNext());
         }
         TestRecord.put(24, recordsArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
         long chunkLen6 = (decoder.readMapStart());
         if (chunkLen6 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
             Object oldMap0 = TestRecord.get(25);
             if (oldMap0 instanceof Map) {
@@ -561,16 +699,44 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMap0 = recordsMapReuse0;
             } else {
                 recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
                     Utf8 key1 = (decoder.readString(null));
+<<<<<<< HEAD
                     recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder)));
+=======
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen6 = (decoder.mapNext());
             } while (chunkLen6 > 0);
         } else {
+<<<<<<< HEAD
             recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(25, recordsMap0);
         int unionIndex15 = (decoder.readIndex());
@@ -604,7 +770,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                             recordsArrayUnionOption0 .add(null);
                         } else {
                             if (unionIndex16 == 1) {
+<<<<<<< HEAD
                                 recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder)));
+=======
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             } else {
                                 throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
                             }
@@ -619,7 +789,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex17 = (decoder.readIndex());
@@ -631,6 +805,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
                 long chunkLen8 = (decoder.readMapStart());
                 if (chunkLen8 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
                     Object oldMap1 = TestRecord.get(27);
                     if (oldMap1 instanceof Map) {
@@ -641,6 +816,22 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
                     } else {
                         recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
@@ -651,7 +842,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapUnionOption0 .put(key2, null);
                             } else {
                                 if (unionIndex18 == 1) {
+<<<<<<< HEAD
                                     recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
                                 }
@@ -660,7 +855,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen8 = (decoder.mapNext());
                     } while (chunkLen8 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(27, recordsMapUnionOption0);
             } else {
@@ -689,6 +892,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
                 long chunkLen10 = (decoder.readMapStart());
                 if (chunkLen10 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
                     if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
                         recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
@@ -698,6 +902,21 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsArrayMapElem0 = recordsArrayMapElemReuse0;
                     } else {
                         recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
@@ -708,7 +927,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapElem0 .put(key3, null);
                             } else {
                                 if (unionIndex19 == 1) {
+<<<<<<< HEAD
                                     recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
                                 }
@@ -717,7 +940,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen10 = (decoder.mapNext());
                     } while (chunkLen10 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 recordsArrayMap0 .add(recordsArrayMapElem0);
             }
@@ -726,12 +957,17 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(28, recordsArrayMap0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
         long chunkLen11 = (decoder.readMapStart());
         if (chunkLen11 > 0) {
+<<<<<<< HEAD
             Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
             Object oldMap2 = TestRecord.get(29);
             if (oldMap2 instanceof Map) {
@@ -742,6 +978,22 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMapArray0 = recordsMapArrayReuse0;
             } else {
                 recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
@@ -770,7 +1022,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapArrayValue0 .add(null);
                             } else {
                                 if (unionIndex20 == 1) {
+<<<<<<< HEAD
                                     recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder)));
+=======
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
                                 }
@@ -783,7 +1039,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 chunkLen11 = (decoder.mapNext());
             } while (chunkLen11 > 0);
         } else {
+<<<<<<< HEAD
             recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(29, recordsMapArray0);
         int unionIndex21 = (decoder.readIndex());
@@ -814,6 +1078,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
                         long chunkLen14 = (decoder.readMapStart());
                         if (chunkLen14 > 0) {
+<<<<<<< HEAD
                             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
                             if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
                                 recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
@@ -823,6 +1088,21 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
                             } else {
                                 recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                             do {
                                 for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
@@ -833,7 +1113,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsArrayMapUnionOptionElem0 .put(key5, null);
                                     } else {
                                         if (unionIndex22 == 1) {
+<<<<<<< HEAD
                                             recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder)));
+=======
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
                                         }
@@ -842,7 +1126,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 chunkLen14 = (decoder.mapNext());
                             } while (chunkLen14 > 0);
                         } else {
+<<<<<<< HEAD
                             recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
                     }
@@ -855,7 +1147,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex23 = (decoder.readIndex());
@@ -867,6 +1163,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
                 long chunkLen15 = (decoder.readMapStart());
                 if (chunkLen15 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
                     Object oldMap3 = TestRecord.get(31);
                     if (oldMap3 instanceof Map) {
@@ -877,6 +1174,22 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
                     } else {
                         recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
@@ -905,7 +1218,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsMapArrayUnionOptionValue0 .add(null);
                                     } else {
                                         if (unionIndex24 == 1) {
+<<<<<<< HEAD
                                             recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder)));
+=======
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
                                         }
@@ -918,7 +1235,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen15 = (decoder.mapNext());
                     } while (chunkLen15 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(31, recordsMapArrayUnionOption0);
             } else {
@@ -931,7 +1256,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(32, null);
         } else {
             if (unionIndex25 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder)));
+=======
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex25 == 2) {
                     Utf8 charSequence4;
@@ -953,7 +1282,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveBooleanList booleanArray0 = null;
@@ -990,7 +1323,11 @@ private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(34, doubleArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveFloatList floatArray0 = null;
@@ -1014,7 +1351,11 @@ private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(36, intArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveLongList longArray0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_record_GenericDeserializer_1223705675_568621313.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_record_GenericDeserializer_1223705675_568621313.java
index 24f5dc5ce..8d4d4825a 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_record_GenericDeserializer_1223705675_568621313.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_record_GenericDeserializer_1223705675_568621313.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,7 +27,11 @@ public Map_of_record_GenericDeserializer_1223705675_568621313(Schema readerSchem
         this.unionOptionMapValueSchema0 = readerSchema.getValueType();
     }
 
+<<<<<<< HEAD
     public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder)
+=======
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -34,6 +42,7 @@ public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Deco
                 Map<Utf8, IndexedRecord> unionOption0 = null;
                 long chunkLen0 = (decoder.readMapStart());
                 if (chunkLen0 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
                     if ((reuse) instanceof Map) {
                         unionOptionReuse0 = ((Map)(reuse));
@@ -43,16 +52,43 @@ public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Deco
                         unionOption0 = unionOptionReuse0;
                     } else {
                         unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
+                        if ((reuse) instanceof Map) {
+                            unionOptionReuse0 = ((Map)(reuse));
+                        }
+                        if (unionOptionReuse0 != (null)) {
+                            unionOptionReuse0 .clear();
+                            unionOption0 = unionOptionReuse0;
+                        } else {
+                            unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
                             Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                             unionOption0 .put(key0, deserializerecord0(null, (decoder)));
+=======
+                            unionOption0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         chunkLen0 = (decoder.mapNext());
                     } while (chunkLen0 > 0);
                 } else {
+<<<<<<< HEAD
                     unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+                    } else {
+                        unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 return unionOption0;
             } else {
@@ -61,7 +97,11 @@ public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Deco
         }
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_record_GenericDeserializer_1677529043_1677529043.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_record_GenericDeserializer_1677529043_1677529043.java
index 6185ef7aa..445e9ad8a 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_record_GenericDeserializer_1677529043_1677529043.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/Map_of_record_GenericDeserializer_1677529043_1677529043.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,12 +28,17 @@ public Map_of_record_GenericDeserializer_1677529043_1677529043(Schema readerSche
         this.field0 = mapMapValueSchema0 .getField("field").schema();
     }
 
+<<<<<<< HEAD
     public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder)
+=======
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, IndexedRecord> map0 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, IndexedRecord> mapReuse0 = null;
             if ((reuse) instanceof Map) {
                 mapReuse0 = ((Map)(reuse));
@@ -39,21 +48,52 @@ public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Deco
                 map0 = mapReuse0;
             } else {
                 map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     map0 .put(key0, deserializerecord0(null, (decoder)));
+=======
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             map0 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         return map0;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
index 25706d7ee..88be4cb8b 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.io.Decoder;
@@ -18,6 +22,7 @@ public RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609(Sche
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder)
         throws IOException
     {
@@ -25,6 +30,15 @@ public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField dese
     }
 
     public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRecordWithLargeUnionField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField RecordWithLargeUnionField;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
index effdb2b31..9246e05b8 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.io.Decoder;
 import org.apache.avro.util.Utf8;
@@ -17,6 +21,7 @@ public RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691(Schema re
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -24,6 +29,15 @@ public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deseria
     }
 
     public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
index dcbd0544d..613da9dc5 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.io.Decoder;
@@ -18,6 +22,7 @@ public RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691(Schema rea
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -25,6 +30,15 @@ public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deseria
     }
 
     public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
@@ -41,6 +55,7 @@ public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deseria
             charSequence0 = (decoder).readString(null);
         }
         RemovedTypesTestRecord.put(0, charSequence0);
+<<<<<<< HEAD
         populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (decoder));
         populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (decoder));
         populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (decoder));
@@ -57,6 +72,24 @@ public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deseria
     }
 
     private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+        populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord3((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord4((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord5((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord6((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord7((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord8((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord9((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord10((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord11((RemovedTypesTestRecord), (customization), (decoder));
+        return RemovedTypesTestRecord;
+    }
+
+    private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         decoder.skipBytes();
@@ -73,7 +106,11 @@ private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -98,7 +135,11 @@ private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         long chunkLen2 = (decoder.readArrayStart());
@@ -142,7 +183,11 @@ private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         decoder.skipFixed(1);
@@ -158,7 +203,11 @@ private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         long chunkLen4 = (decoder.readArrayStart());
@@ -184,7 +233,11 @@ private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         long chunkLen6 = (decoder.readArrayStart());
@@ -228,7 +281,11 @@ private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         decoder.readEnum();
@@ -244,7 +301,11 @@ private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         long chunkLen8 = (decoder.readArrayStart());
@@ -266,7 +327,11 @@ private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         long chunkLen10 = (decoder.readArrayStart());
@@ -310,29 +375,48 @@ private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.genera
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
         throws IOException
     {
         deserializeRemovedSubRecord0(null, (decoder));
+=======
+    private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializeRemovedSubRecord0(null, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         int unionIndex9 = (decoder.readIndex());
         if (unionIndex9 == 0) {
             decoder.readNull();
         } else {
             if (unionIndex9 == 1) {
+<<<<<<< HEAD
                 deserializeRemovedSubRecord0(null, (decoder));
+=======
+                deserializeRemovedSubRecord0(null, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'removedSubRecordUnion': "+ unionIndex9));
             }
         }
     }
 
+<<<<<<< HEAD
     public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder)
+=======
+    public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         decoder.skipString();
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         long chunkLen12 = (decoder.readArrayStart());
@@ -342,7 +426,11 @@ private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.gener
                 if (null instanceof GenericArray) {
                     removedSubRecordArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
                 }
+<<<<<<< HEAD
                 deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder));
+=======
+                deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen12 = (decoder.arrayNext());
         }
@@ -358,7 +446,11 @@ private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.gener
                     decoder.readNull();
                 } else {
                     if (unionIndex10 == 1) {
+<<<<<<< HEAD
                         deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder));
+=======
+                        deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     } else {
                         throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionArrayElem': "+ unionIndex10));
                     }
@@ -368,7 +460,11 @@ private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.gener
         }
     }
 
+<<<<<<< HEAD
     private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, Decoder decoder)
+=======
+    private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         long chunkLen14 = (decoder.readMapStart());
@@ -376,7 +472,11 @@ private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.gener
             do {
                 for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
                     Utf8 key6 = (decoder.readString(null));
+<<<<<<< HEAD
                     deserializeRemovedSubRecord0(null, (decoder));
+=======
+                    deserializeRemovedSubRecord0(null, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen14 = (decoder.mapNext());
             } while (chunkLen14 > 0);
@@ -391,7 +491,11 @@ private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.gener
                         decoder.readNull();
                     } else {
                         if (unionIndex11 == 1) {
+<<<<<<< HEAD
                             deserializeRemovedSubRecord0(null, (decoder));
+=======
+                            deserializeRemovedSubRecord0(null, (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         } else {
                             throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionMapValue': "+ unionIndex11));
                         }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
index bc6c0ce3f..7a39f813e 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
@@ -5,6 +5,10 @@
 import java.util.ArrayList;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public SplitRecordTest1_SpecificDeserializer_1718878379_595582209(Schema readerS
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(c
     }
 
     public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSplitRecordTest10(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSplitRecordTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1;
@@ -35,12 +49,21 @@ public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSp
         } else {
             SplitRecordTest1 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1();
         }
+<<<<<<< HEAD
         SplitRecordTest1 .put(0, deserializeFullRecord0(SplitRecordTest1 .get(0), (decoder)));
         populate_SplitRecordTest10((SplitRecordTest1), (decoder));
         return SplitRecordTest1;
     }
 
     public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord0(Object reuse, Decoder decoder)
+=======
+        SplitRecordTest1 .put(0, deserializeFullRecord0(SplitRecordTest1 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest10((SplitRecordTest1), (customization), (decoder));
+        return SplitRecordTest1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
@@ -71,10 +94,17 @@ public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullReco
         return FullRecord;
     }
 
+<<<<<<< HEAD
     private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1, Decoder decoder)
         throws IOException
     {
         SplitRecordTest1 .put(1, deserializeFullRecord1(SplitRecordTest1 .get(1), (decoder)));
+=======
+    private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest1 .put(1, deserializeFullRecord1(SplitRecordTest1 .get(1), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<com.linkedin.avro.fastserde.generated.avro.FullRecord> record30 = null;
         long chunkLen0 = (decoder.readArrayStart());
         Object oldArray0 = SplitRecordTest1 .get(2);
@@ -94,14 +124,22 @@ private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.av
                 if (oldArray0 instanceof GenericArray) {
                     record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
                 }
+<<<<<<< HEAD
                 record30 .add(deserializeFullRecord2(record3ArrayElementReuseVar0, (decoder)));
+=======
+                record30 .add(deserializeFullRecord2(record3ArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen0 = (decoder.arrayNext());
         }
         SplitRecordTest1 .put(2, record30);
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord1(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
@@ -125,7 +163,11 @@ public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullReco
         return FullRecord;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord2(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord2(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
@@ -152,11 +194,19 @@ public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullReco
                 throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
             }
         }
+<<<<<<< HEAD
         populate_FullRecord0((FullRecord), (decoder));
         return FullRecord;
     }
 
     private void populate_FullRecord0(com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord, Decoder decoder)
+=======
+        populate_FullRecord0((FullRecord), (customization), (decoder));
+        return FullRecord;
+    }
+
+    private void populate_FullRecord0(com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
index c9d12c196..5ebbdaf5b 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
@@ -5,6 +5,10 @@
 import java.util.ArrayList;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.FullRecord;
 import com.linkedin.avro.fastserde.generated.avro.StringRecord;
 import org.apache.avro.Schema;
@@ -22,6 +26,7 @@ public SplitRecordTest2_SpecificDeserializer_595582209_1718878379(Schema readerS
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 reuse, Decoder decoder)
         throws IOException
     {
@@ -29,6 +34,15 @@ public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(c
     }
 
     public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSplitRecordTest20(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest20((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSplitRecordTest20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2;
@@ -37,12 +51,21 @@ public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSp
         } else {
             SplitRecordTest2 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2();
         }
+<<<<<<< HEAD
         SplitRecordTest2 .put(0, deserializeStringRecord0(SplitRecordTest2 .get(0), (decoder)));
         populate_SplitRecordTest20((SplitRecordTest2), (decoder));
         return SplitRecordTest2;
     }
 
     public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder)
+=======
+        SplitRecordTest2 .put(0, deserializeStringRecord0(SplitRecordTest2 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest20((SplitRecordTest2), (customization), (decoder));
+        return SplitRecordTest2;
+    }
+
+    public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         StringRecord IntRecord;
@@ -69,11 +92,19 @@ public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder)
                 throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
             }
         }
+<<<<<<< HEAD
         populate_IntRecord0((IntRecord), (decoder));
         return IntRecord;
     }
 
     private void populate_IntRecord0(StringRecord IntRecord, Decoder decoder)
+=======
+        populate_IntRecord0((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord0(StringRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -88,10 +119,17 @@ private void populate_IntRecord0(StringRecord IntRecord, Decoder decoder)
         }
     }
 
+<<<<<<< HEAD
     private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2, Decoder decoder)
         throws IOException
     {
         SplitRecordTest2 .put(1, deserializeIntRecord0(SplitRecordTest2 .get(1), (decoder)));
+=======
+    private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest2 .put(1, deserializeIntRecord0(SplitRecordTest2 .get(1), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<FullRecord> record30 = null;
         long chunkLen0 = (decoder.readArrayStart());
         Object oldArray0 = SplitRecordTest2 .get(2);
@@ -111,14 +149,22 @@ private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.av
                 if (oldArray0 instanceof GenericArray) {
                     record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
                 }
+<<<<<<< HEAD
                 record30 .add(deserializeFullRecord0(record3ArrayElementReuseVar0, (decoder)));
+=======
+                record30 .add(deserializeFullRecord0(record3ArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen0 = (decoder.arrayNext());
         }
         SplitRecordTest2 .put(2, record30);
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord;
@@ -137,11 +183,19 @@ public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord
                 throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
             }
         }
+<<<<<<< HEAD
         populate_IntRecord1((IntRecord), (decoder));
         return IntRecord;
     }
 
     private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord, Decoder decoder)
+=======
+        populate_IntRecord1((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -157,7 +211,11 @@ private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntR
         }
     }
 
+<<<<<<< HEAD
     public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder)
+=======
+    public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         FullRecord IntRecord;
@@ -184,11 +242,19 @@ public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder)
                 throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex4));
             }
         }
+<<<<<<< HEAD
         populate_IntRecord2((IntRecord), (decoder));
         return IntRecord;
     }
 
     private void populate_IntRecord2(FullRecord IntRecord, Decoder decoder)
+=======
+        populate_IntRecord2((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord2(FullRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/StringableRecord_SpecificDeserializer_842267318_842267318.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/StringableRecord_SpecificDeserializer_842267318_842267318.java
index e9ab6defe..baa117c2b 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/StringableRecord_SpecificDeserializer_842267318_842267318.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/StringableRecord_SpecificDeserializer_842267318_842267318.java
@@ -14,6 +14,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroRuntimeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
@@ -30,11 +34,19 @@ public StringableRecord_SpecificDeserializer_842267318_842267318(Schema readerSc
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder)
         throws IOException
     {
         try {
             return deserializeStringableRecord0((reuse), (decoder));
+=======
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        try {
+            return deserializeStringableRecord0((reuse), (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         } catch (NumberFormatException e) {
             throw new AvroRuntimeException(e);
         } catch (MalformedURLException e) {
@@ -44,7 +56,11 @@ public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(c
         }
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
     {
         com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord;
@@ -55,6 +71,7 @@ public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeSt
         }
         BigInteger charSequence0 = new BigInteger((decoder.readString()));
         StringableRecord.put(0, charSequence0);
+<<<<<<< HEAD
         populate_StringableRecord0((StringableRecord), (decoder));
         populate_StringableRecord1((StringableRecord), (decoder));
         populate_StringableRecord2((StringableRecord), (decoder));
@@ -64,6 +81,17 @@ public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeSt
     }
 
     private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, Decoder decoder)
+=======
+        populate_StringableRecord0((StringableRecord), (customization), (decoder));
+        populate_StringableRecord1((StringableRecord), (customization), (decoder));
+        populate_StringableRecord2((StringableRecord), (customization), (decoder));
+        populate_StringableRecord3((StringableRecord), (customization), (decoder));
+        populate_StringableRecord4((StringableRecord), (customization), (decoder));
+        return StringableRecord;
+    }
+
+    private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException, NumberFormatException, URISyntaxException
     {
         BigDecimal charSequence1 = new BigDecimal((decoder.readString()));
@@ -72,7 +100,11 @@ private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.av
         StringableRecord.put(2, charSequence2);
     }
 
+<<<<<<< HEAD
     private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, Decoder decoder)
+=======
+    private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
     {
         URL charSequence3 = new URL((decoder.readString()));
@@ -81,7 +113,11 @@ private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.av
         StringableRecord.put(4, charSequence4);
     }
 
+<<<<<<< HEAD
     private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, Decoder decoder)
+=======
+    private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
     {
         List<URL> urlArray0 = null;
@@ -112,6 +148,7 @@ private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.av
         Map<URL, BigInteger> urlMap0 = null;
         long chunkLen1 = (decoder.readMapStart());
         if (chunkLen1 > 0) {
+<<<<<<< HEAD
             Map<URL, BigInteger> urlMapReuse0 = null;
             Object oldMap0 = StringableRecord.get(6);
             if (oldMap0 instanceof Map) {
@@ -122,6 +159,22 @@ private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.av
                 urlMap0 = urlMapReuse0;
             } else {
                 urlMap0 = new HashMap<URL, BigInteger>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), ((int) chunkLen1)));
+            } else {
+                Map<URL, BigInteger> urlMapReuse0 = null;
+                Object oldMap0 = StringableRecord.get(6);
+                if (oldMap0 instanceof Map) {
+                    urlMapReuse0 = ((Map) oldMap0);
+                }
+                if (urlMapReuse0 != (null)) {
+                    urlMapReuse0 .clear();
+                    urlMap0 = urlMapReuse0;
+                } else {
+                    urlMap0 = new HashMap<URL, BigInteger>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
@@ -132,11 +185,20 @@ private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.av
                 chunkLen1 = (decoder.mapNext());
             } while (chunkLen1 > 0);
         } else {
+<<<<<<< HEAD
             urlMap0 = new HashMap<URL, BigInteger>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), 0));
+            } else {
+                urlMap0 = new HashMap<URL, BigInteger>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         StringableRecord.put(6, urlMap0);
     }
 
+<<<<<<< HEAD
     private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, Decoder decoder)
         throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
     {
@@ -145,6 +207,16 @@ private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.av
     }
 
     public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder)
+=======
+    private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        StringableRecord.put(7, deserializeStringableSubRecord0(StringableRecord.get(7), (decoder), (customization)));
+        StringableRecord.put(8, deserializeAnotherSubRecord0(StringableRecord.get(8), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException, URISyntaxException
     {
         com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord;
@@ -155,11 +227,19 @@ public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializ
         }
         URI charSequence7 = new URI((decoder.readString()));
         StringableSubRecord.put(0, charSequence7);
+<<<<<<< HEAD
         populate_StringableSubRecord0((StringableSubRecord), (decoder));
         return StringableSubRecord;
     }
 
     private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, Decoder decoder)
+=======
+        populate_StringableSubRecord0((StringableSubRecord), (customization), (decoder));
+        return StringableSubRecord;
+    }
+
+    private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException, URISyntaxException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -186,7 +266,11 @@ private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated
         }
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException, URISyntaxException
     {
         com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord AnotherSubRecord;
@@ -195,11 +279,19 @@ public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAn
         } else {
             AnotherSubRecord = new com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord();
         }
+<<<<<<< HEAD
         AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder)));
         return AnotherSubRecord;
     }
 
     private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, Decoder decoder)
+=======
+        AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder), (customization)));
+        return AnotherSubRecord;
+    }
+
+    private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
     {
         int unionIndex1 = (decoder.readIndex());
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
index 6aa9a2730..6367ff26c 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
@@ -5,6 +5,10 @@
 import com.linkedin.avro.api.PrimitiveFloatList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -21,6 +25,7 @@ public TestArrayOfFloats_GenericDeserializer_1408566797_1408566797(Schema reader
         this.array_of_float0 = readerSchema.getField("array_of_float").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -28,6 +33,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestArrayOfFloats0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord TestArrayOfFloats;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_GenericDeserializer_473555078_473555078.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_GenericDeserializer_473555078_473555078.java
index 0200ae69f..9e2170563 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_GenericDeserializer_473555078_473555078.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_GenericDeserializer_473555078_473555078.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -22,6 +26,7 @@ public TestRecord_GenericDeserializer_473555078_473555078(Schema readerSchema) {
         this.map_field0 = readerSchema.getField("map_field").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -29,6 +34,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord TestRecord;
@@ -40,6 +54,7 @@ public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder)
         Map<Utf8, Utf8> map_field1 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Utf8> map_fieldReuse0 = null;
             Object oldMap0 = TestRecord.get(0);
             if (oldMap0 instanceof Map) {
@@ -50,6 +65,22 @@ public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder)
                 map_field1 = map_fieldReuse0;
             } else {
                 map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Utf8> map_fieldReuse0 = null;
+                Object oldMap0 = TestRecord.get(0);
+                if (oldMap0 instanceof Map) {
+                    map_fieldReuse0 = ((Map) oldMap0);
+                }
+                if (map_fieldReuse0 != (null)) {
+                    map_fieldReuse0 .clear();
+                    map_field1 = map_fieldReuse0;
+                } else {
+                    map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -60,7 +91,15 @@ public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder)
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             map_field1 = new HashMap<Utf8, Utf8>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), 0));
+            } else {
+                map_field1 = new HashMap<Utf8, Utf8>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(0, map_field1);
         return TestRecord;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_1898726132_553331077.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_1898726132_553331077.java
index 80878a014..a5b35454b 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_1898726132_553331077.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_1898726132_553331077.java
@@ -9,6 +9,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.TestEnum;
 import com.linkedin.avro.fastserde.generated.avro.TestFixed;
 import com.linkedin.avroutil1.Enums;
@@ -61,6 +65,7 @@ public TestRecord_SpecificDeserializer_1898726132_553331077(Schema readerSchema)
         this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -68,6 +73,15 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.lin
     }
 
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
@@ -77,6 +91,7 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
             TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
         }
         TestRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_TestRecord0((TestRecord), (decoder));
         populate_TestRecord1((TestRecord), (decoder));
         populate_TestRecord2((TestRecord), (decoder));
@@ -94,6 +109,25 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
         populate_TestRecord14((TestRecord), (decoder));
         populate_TestRecord15((TestRecord), (decoder));
         populate_TestRecord16((TestRecord), (decoder));
+=======
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
         TestRecord.put(33, defaultArray0);
         ArrayList<Double> defaultArray1 = new ArrayList<Double>();
@@ -109,7 +143,11 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
         return TestRecord;
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -126,7 +164,11 @@ private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(2, (decoder.readLong()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -143,7 +185,11 @@ private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(4, (decoder.readDouble()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -160,7 +206,11 @@ private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(6, (decoder.readFloat()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -177,7 +227,11 @@ private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(8, (decoder.readBoolean()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -201,7 +255,11 @@ private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(10, byteBuffer0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -232,7 +290,11 @@ private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(12, charSequence0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
@@ -265,7 +327,11 @@ private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.Tes
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         byte[] testFixed0;
@@ -302,7 +368,11 @@ private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.Tes
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedArray0 = null;
@@ -385,7 +455,11 @@ private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(17, testFixedUnionArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int enumIndex0 = (decoder.readEnum());
@@ -426,7 +500,11 @@ private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.Tes
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<TestEnum> testEnumArray0 = null;
@@ -509,7 +587,11 @@ private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(21, testEnumUnionArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex12 = (decoder.readIndex());
@@ -518,15 +600,26 @@ private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(22, null);
         } else {
             if (unionIndex12 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder)));
+=======
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
             }
         }
+<<<<<<< HEAD
         TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder)));
     }
 
     public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder)
+=======
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
@@ -553,11 +646,19 @@ public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord
                 throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
             }
         }
+<<<<<<< HEAD
         populate_SubRecord0((SubRecord), (decoder));
         return SubRecord;
     }
 
     private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, Decoder decoder)
+=======
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex14 = (decoder.readIndex());
@@ -590,7 +691,11 @@ private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubR
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
@@ -612,7 +717,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 if (oldArray4 instanceof GenericArray) {
                     recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
                 }
+<<<<<<< HEAD
                 recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen4 = (decoder.arrayNext());
         }
@@ -620,6 +729,7 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
         long chunkLen5 = (decoder.readMapStart());
         if (chunkLen5 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
             Object oldMap0 = TestRecord.get(25);
             if (oldMap0 instanceof Map) {
@@ -630,21 +740,53 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMap0 = recordsMapReuse0;
             } else {
                 recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder)));
+=======
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen5 = (decoder.mapNext());
             } while (chunkLen5 > 0);
         } else {
+<<<<<<< HEAD
             recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(25, recordsMap0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex16 = (decoder.readIndex());
@@ -678,7 +820,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                             recordsArrayUnionOption0 .add(null);
                         } else {
                             if (unionIndex17 == 1) {
+<<<<<<< HEAD
                                 recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder)));
+=======
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             } else {
                                 throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
                             }
@@ -700,6 +846,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
                 long chunkLen7 = (decoder.readMapStart());
                 if (chunkLen7 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
                     Object oldMap1 = TestRecord.get(27);
                     if (oldMap1 instanceof Map) {
@@ -710,6 +857,22 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
                     } else {
                         recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
@@ -720,7 +883,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapUnionOption0 .put(key1, null);
                             } else {
                                 if (unionIndex19 == 1) {
+<<<<<<< HEAD
                                     recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
                                 }
@@ -729,7 +896,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen7 = (decoder.mapNext());
                     } while (chunkLen7 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(27, recordsMapUnionOption0);
             } else {
@@ -738,7 +913,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
@@ -763,6 +942,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
                 long chunkLen9 = (decoder.readMapStart());
                 if (chunkLen9 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
                     if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
                         recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
@@ -772,6 +952,21 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsArrayMapElem0 = recordsArrayMapElemReuse0;
                     } else {
                         recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
@@ -782,7 +977,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapElem0 .put(key2, null);
                             } else {
                                 if (unionIndex20 == 1) {
+<<<<<<< HEAD
                                     recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
                                 }
@@ -791,7 +990,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen9 = (decoder.mapNext());
                     } while (chunkLen9 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 recordsArrayMap0 .add(recordsArrayMapElem0);
             }
@@ -801,6 +1008,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
         Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
         long chunkLen10 = (decoder.readMapStart());
         if (chunkLen10 > 0) {
+<<<<<<< HEAD
             Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
             Object oldMap2 = TestRecord.get(29);
             if (oldMap2 instanceof Map) {
@@ -811,6 +1019,22 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMapArray0 = recordsMapArrayReuse0;
             } else {
                 recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
@@ -839,7 +1063,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapArrayValue0 .add(null);
                             } else {
                                 if (unionIndex21 == 1) {
+<<<<<<< HEAD
                                     recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder)));
+=======
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
                                 }
@@ -852,12 +1080,24 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 chunkLen10 = (decoder.mapNext());
             } while (chunkLen10 > 0);
         } else {
+<<<<<<< HEAD
             recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(29, recordsMapArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex22 = (decoder.readIndex());
@@ -888,6 +1128,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
                         long chunkLen13 = (decoder.readMapStart());
                         if (chunkLen13 > 0) {
+<<<<<<< HEAD
                             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
                             if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
                                 recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
@@ -897,6 +1138,21 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
                             } else {
                                 recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                             do {
                                 for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
@@ -907,7 +1163,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsArrayMapUnionOptionElem0 .put(key4, null);
                                     } else {
                                         if (unionIndex23 == 1) {
+<<<<<<< HEAD
                                             recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder)));
+=======
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
                                         }
@@ -916,7 +1176,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                 chunkLen13 = (decoder.mapNext());
                             } while (chunkLen13 > 0);
                         } else {
+<<<<<<< HEAD
                             recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
                     }
@@ -936,6 +1204,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
                 long chunkLen14 = (decoder.readMapStart());
                 if (chunkLen14 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
                     Object oldMap3 = TestRecord.get(31);
                     if (oldMap3 instanceof Map) {
@@ -946,6 +1215,22 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
                     } else {
                         recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
@@ -974,7 +1259,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsMapArrayUnionOptionValue0 .add(null);
                                     } else {
                                         if (unionIndex25 == 1) {
+<<<<<<< HEAD
                                             recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder)));
+=======
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
                                         }
@@ -987,7 +1276,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen14 = (decoder.mapNext());
                     } while (chunkLen14 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(31, recordsMapArrayUnionOption0);
             } else {
@@ -996,7 +1293,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex26 = (decoder.readIndex());
@@ -1005,7 +1306,11 @@ private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(32, null);
         } else {
             if (unionIndex26 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder)));
+=======
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex26 == 2) {
                     Utf8 charSequence4;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_1991094399_553331077.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_1991094399_553331077.java
index 4fb1c2f90..1d08f83bf 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_1991094399_553331077.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_1991094399_553331077.java
@@ -9,6 +9,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.TestEnum;
 import com.linkedin.avro.fastserde.generated.avro.TestFixed;
 import com.linkedin.avroutil1.Enums;
@@ -65,6 +69,7 @@ public TestRecord_SpecificDeserializer_1991094399_553331077(Schema readerSchema)
         this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -72,6 +77,15 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.lin
     }
 
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
@@ -81,6 +95,7 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
             TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
         }
         TestRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_TestRecord0((TestRecord), (decoder));
         populate_TestRecord1((TestRecord), (decoder));
         populate_TestRecord2((TestRecord), (decoder));
@@ -98,6 +113,25 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
         populate_TestRecord14((TestRecord), (decoder));
         populate_TestRecord15((TestRecord), (decoder));
         populate_TestRecord16((TestRecord), (decoder));
+=======
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
         TestRecord.put(33, defaultArray0);
         ArrayList<Double> defaultArray1 = new ArrayList<Double>();
@@ -113,7 +147,11 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
         return TestRecord;
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -130,7 +168,11 @@ private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(2, (decoder.readLong()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -147,7 +189,11 @@ private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(4, (decoder.readDouble()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -164,7 +210,11 @@ private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(6, (decoder.readFloat()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -181,7 +231,11 @@ private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(8, (decoder.readBoolean()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -205,7 +259,11 @@ private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(10, byteBuffer0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -236,7 +294,11 @@ private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(12, charSequence0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
@@ -269,7 +331,11 @@ private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.Tes
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         byte[] testFixed0;
@@ -306,7 +372,11 @@ private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.Tes
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedArray0 = null;
@@ -389,7 +459,11 @@ private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(17, testFixedUnionArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int enumIndex0 = (decoder.readEnum());
@@ -430,7 +504,11 @@ private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.Tes
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<TestEnum> testEnumArray0 = null;
@@ -513,7 +591,11 @@ private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(21, testEnumUnionArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex12 = (decoder.readIndex());
@@ -522,15 +604,26 @@ private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(22, null);
         } else {
             if (unionIndex12 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder)));
+=======
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
             }
         }
+<<<<<<< HEAD
         TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder)));
     }
 
     public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder)
+=======
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
@@ -557,11 +650,19 @@ public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord
                 throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
             }
         }
+<<<<<<< HEAD
         populate_SubRecord0((SubRecord), (decoder));
         return SubRecord;
     }
 
     private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, Decoder decoder)
+=======
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex14 = (decoder.readIndex());
@@ -594,7 +695,11 @@ private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubR
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
@@ -616,7 +721,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 if (oldArray4 instanceof GenericArray) {
                     recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
                 }
+<<<<<<< HEAD
                 recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen4 = (decoder.arrayNext());
         }
@@ -624,6 +733,7 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
         long chunkLen5 = (decoder.readMapStart());
         if (chunkLen5 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
             Object oldMap0 = TestRecord.get(25);
             if (oldMap0 instanceof Map) {
@@ -634,21 +744,53 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMap0 = recordsMapReuse0;
             } else {
                 recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder)));
+=======
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen5 = (decoder.mapNext());
             } while (chunkLen5 > 0);
         } else {
+<<<<<<< HEAD
             recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(25, recordsMap0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex16 = (decoder.readIndex());
@@ -682,7 +824,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                             recordsArrayUnionOption0 .add(null);
                         } else {
                             if (unionIndex17 == 1) {
+<<<<<<< HEAD
                                 recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder)));
+=======
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             } else {
                                 throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
                             }
@@ -704,6 +850,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
                 long chunkLen7 = (decoder.readMapStart());
                 if (chunkLen7 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
                     Object oldMap1 = TestRecord.get(27);
                     if (oldMap1 instanceof Map) {
@@ -714,6 +861,22 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
                     } else {
                         recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
@@ -724,7 +887,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapUnionOption0 .put(key1, null);
                             } else {
                                 if (unionIndex19 == 1) {
+<<<<<<< HEAD
                                     recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
                                 }
@@ -733,7 +900,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen7 = (decoder.mapNext());
                     } while (chunkLen7 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(27, recordsMapUnionOption0);
             } else {
@@ -742,7 +917,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
@@ -767,6 +946,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
                 long chunkLen9 = (decoder.readMapStart());
                 if (chunkLen9 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
                     if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
                         recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
@@ -776,6 +956,21 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsArrayMapElem0 = recordsArrayMapElemReuse0;
                     } else {
                         recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
@@ -786,7 +981,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapElem0 .put(key2, null);
                             } else {
                                 if (unionIndex20 == 1) {
+<<<<<<< HEAD
                                     recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
                                 }
@@ -795,7 +994,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen9 = (decoder.mapNext());
                     } while (chunkLen9 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 recordsArrayMap0 .add(recordsArrayMapElem0);
             }
@@ -805,6 +1012,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
         Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
         long chunkLen10 = (decoder.readMapStart());
         if (chunkLen10 > 0) {
+<<<<<<< HEAD
             Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
             Object oldMap2 = TestRecord.get(29);
             if (oldMap2 instanceof Map) {
@@ -815,6 +1023,22 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMapArray0 = recordsMapArrayReuse0;
             } else {
                 recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
@@ -843,7 +1067,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapArrayValue0 .add(null);
                             } else {
                                 if (unionIndex21 == 1) {
+<<<<<<< HEAD
                                     recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder)));
+=======
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
                                 }
@@ -856,12 +1084,24 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 chunkLen10 = (decoder.mapNext());
             } while (chunkLen10 > 0);
         } else {
+<<<<<<< HEAD
             recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(29, recordsMapArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex22 = (decoder.readIndex());
@@ -892,6 +1132,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
                         long chunkLen13 = (decoder.readMapStart());
                         if (chunkLen13 > 0) {
+<<<<<<< HEAD
                             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
                             if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
                                 recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
@@ -901,6 +1142,21 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
                             } else {
                                 recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                             do {
                                 for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
@@ -911,7 +1167,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsArrayMapUnionOptionElem0 .put(key4, null);
                                     } else {
                                         if (unionIndex23 == 1) {
+<<<<<<< HEAD
                                             recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder)));
+=======
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
                                         }
@@ -920,7 +1180,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                 chunkLen13 = (decoder.mapNext());
                             } while (chunkLen13 > 0);
                         } else {
+<<<<<<< HEAD
                             recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
                     }
@@ -940,6 +1208,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
                 long chunkLen14 = (decoder.readMapStart());
                 if (chunkLen14 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
                     Object oldMap3 = TestRecord.get(31);
                     if (oldMap3 instanceof Map) {
@@ -950,6 +1219,22 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
                     } else {
                         recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
@@ -978,7 +1263,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsMapArrayUnionOptionValue0 .add(null);
                                     } else {
                                         if (unionIndex25 == 1) {
+<<<<<<< HEAD
                                             recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder)));
+=======
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
                                         }
@@ -991,7 +1280,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen14 = (decoder.mapNext());
                     } while (chunkLen14 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(31, recordsMapArrayUnionOption0);
             } else {
@@ -1000,7 +1297,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex26 = (decoder.readIndex());
@@ -1009,7 +1310,11 @@ private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(32, null);
         } else {
             if (unionIndex26 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder)));
+=======
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex26 == 2) {
                     Utf8 charSequence4;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_553331077_553331077.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_553331077_553331077.java
index 0a2b911d9..e0a7bb095 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_553331077_553331077.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/TestRecord_SpecificDeserializer_553331077_553331077.java
@@ -14,6 +14,10 @@
 import com.linkedin.avro.api.PrimitiveLongList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.TestEnum;
 import com.linkedin.avro.fastserde.generated.avro.TestFixed;
 import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
@@ -37,6 +41,7 @@ public TestRecord_SpecificDeserializer_553331077_553331077(Schema readerSchema)
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -44,6 +49,15 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.lin
     }
 
     public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
@@ -53,6 +67,7 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
             TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
         }
         TestRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_TestRecord0((TestRecord), (decoder));
         populate_TestRecord1((TestRecord), (decoder));
         populate_TestRecord2((TestRecord), (decoder));
@@ -76,6 +91,31 @@ public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestReco
     }
 
     private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -92,7 +132,11 @@ private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(2, (decoder.readLong()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex1 = (decoder.readIndex());
@@ -109,7 +153,11 @@ private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(4, (decoder.readDouble()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex2 = (decoder.readIndex());
@@ -126,7 +174,11 @@ private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(6, (decoder.readFloat()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex3 = (decoder.readIndex());
@@ -143,7 +195,11 @@ private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(8, (decoder.readBoolean()));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex4 = (decoder.readIndex());
@@ -167,7 +223,11 @@ private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(10, byteBuffer0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex5 = (decoder.readIndex());
@@ -198,7 +258,11 @@ private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(12, charSequence0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex6 = (decoder.readIndex());
@@ -232,7 +296,11 @@ private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(14, testFixed1);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex7 = (decoder.readIndex());
@@ -292,7 +360,11 @@ private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(16, testFixedArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedUnionArray0 = null;
@@ -342,7 +414,11 @@ private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex9 = (decoder.readIndex());
@@ -378,7 +454,11 @@ private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.Tes
         TestRecord.put(20, testEnumArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<TestEnum> testEnumUnionArray0 = null;
@@ -421,14 +501,22 @@ private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(22, null);
         } else {
             if (unionIndex11 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder)));
+=======
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
             }
         }
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
@@ -455,11 +543,19 @@ public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord
                 throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
             }
         }
+<<<<<<< HEAD
         populate_SubRecord0((SubRecord), (decoder));
         return SubRecord;
     }
 
     private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, Decoder decoder)
+=======
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex13 = (decoder.readIndex());
@@ -482,10 +578,17 @@ private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubR
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
         throws IOException
     {
         TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder)));
+=======
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
         long chunkLen4 = (decoder.readArrayStart());
         Object oldArray4 = TestRecord.get(24);
@@ -505,19 +608,28 @@ private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.Te
                 if (oldArray4 instanceof GenericArray) {
                     recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
                 }
+<<<<<<< HEAD
                 recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder)));
+=======
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen4 = (decoder.arrayNext());
         }
         TestRecord.put(24, recordsArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
         long chunkLen5 = (decoder.readMapStart());
         if (chunkLen5 > 0) {
+<<<<<<< HEAD
             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
             Object oldMap0 = TestRecord.get(25);
             if (oldMap0 instanceof Map) {
@@ -528,16 +640,44 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMap0 = recordsMapReuse0;
             } else {
                 recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder)));
+=======
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen5 = (decoder.mapNext());
             } while (chunkLen5 > 0);
         } else {
+<<<<<<< HEAD
             recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(25, recordsMap0);
         int unionIndex14 = (decoder.readIndex());
@@ -571,7 +711,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
                             recordsArrayUnionOption0 .add(null);
                         } else {
                             if (unionIndex15 == 1) {
+<<<<<<< HEAD
                                 recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder)));
+=======
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             } else {
                                 throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
                             }
@@ -586,7 +730,11 @@ private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex16 = (decoder.readIndex());
@@ -598,6 +746,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
                 long chunkLen7 = (decoder.readMapStart());
                 if (chunkLen7 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
                     Object oldMap1 = TestRecord.get(27);
                     if (oldMap1 instanceof Map) {
@@ -608,6 +757,22 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
                     } else {
                         recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
@@ -618,7 +783,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapUnionOption0 .put(key1, null);
                             } else {
                                 if (unionIndex17 == 1) {
+<<<<<<< HEAD
                                     recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
                                 }
@@ -627,7 +796,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen7 = (decoder.mapNext());
                     } while (chunkLen7 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(27, recordsMapUnionOption0);
             } else {
@@ -656,6 +833,7 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
                 long chunkLen9 = (decoder.readMapStart());
                 if (chunkLen9 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
                     if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
                         recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
@@ -665,6 +843,21 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsArrayMapElem0 = recordsArrayMapElemReuse0;
                     } else {
                         recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
@@ -675,7 +868,11 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapElem0 .put(key2, null);
                             } else {
                                 if (unionIndex18 == 1) {
+<<<<<<< HEAD
                                     recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder)));
+=======
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
                                 }
@@ -684,7 +881,15 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen9 = (decoder.mapNext());
                     } while (chunkLen9 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 recordsArrayMap0 .add(recordsArrayMapElem0);
             }
@@ -693,12 +898,17 @@ private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(28, recordsArrayMap0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
         long chunkLen10 = (decoder.readMapStart());
         if (chunkLen10 > 0) {
+<<<<<<< HEAD
             Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
             Object oldMap2 = TestRecord.get(29);
             if (oldMap2 instanceof Map) {
@@ -709,6 +919,22 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 recordsMapArray0 = recordsMapArrayReuse0;
             } else {
                 recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
@@ -737,7 +963,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsMapArrayValue0 .add(null);
                             } else {
                                 if (unionIndex19 == 1) {
+<<<<<<< HEAD
                                     recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder)));
+=======
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                 } else {
                                     throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
                                 }
@@ -750,7 +980,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                 chunkLen10 = (decoder.mapNext());
             } while (chunkLen10 > 0);
         } else {
+<<<<<<< HEAD
             recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         TestRecord.put(29, recordsMapArray0);
         int unionIndex20 = (decoder.readIndex());
@@ -781,6 +1019,7 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                         Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
                         long chunkLen13 = (decoder.readMapStart());
                         if (chunkLen13 > 0) {
+<<<<<<< HEAD
                             Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
                             if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
                                 recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
@@ -790,6 +1029,21 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
                             } else {
                                 recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                             do {
                                 for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
@@ -800,7 +1054,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsArrayMapUnionOptionElem0 .put(key4, null);
                                     } else {
                                         if (unionIndex21 == 1) {
+<<<<<<< HEAD
                                             recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder)));
+=======
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
                                         }
@@ -809,7 +1067,15 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
                                 chunkLen13 = (decoder.mapNext());
                             } while (chunkLen13 > 0);
                         } else {
+<<<<<<< HEAD
                             recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+=======
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         }
                         recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
                     }
@@ -822,7 +1088,11 @@ private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex22 = (decoder.readIndex());
@@ -834,6 +1104,7 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                 Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
                 long chunkLen14 = (decoder.readMapStart());
                 if (chunkLen14 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
                     Object oldMap3 = TestRecord.get(31);
                     if (oldMap3 instanceof Map) {
@@ -844,6 +1115,22 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
                     } else {
                         recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
@@ -872,7 +1159,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                                         recordsMapArrayUnionOptionValue0 .add(null);
                                     } else {
                                         if (unionIndex23 == 1) {
+<<<<<<< HEAD
                                             recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder)));
+=======
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                         } else {
                                             throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
                                         }
@@ -885,7 +1176,15 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
                         chunkLen14 = (decoder.mapNext());
                     } while (chunkLen14 > 0);
                 } else {
+<<<<<<< HEAD
                     recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 TestRecord.put(31, recordsMapArrayUnionOption0);
             } else {
@@ -898,7 +1197,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
             TestRecord.put(32, null);
         } else {
             if (unionIndex24 == 1) {
+<<<<<<< HEAD
                 TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder)));
+=======
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (unionIndex24 == 2) {
                     Utf8 charSequence4;
@@ -920,7 +1223,11 @@ private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.Te
         }
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveBooleanList booleanArray0 = null;
@@ -957,7 +1264,11 @@ private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(34, doubleArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveFloatList floatArray0 = null;
@@ -981,7 +1292,11 @@ private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.Te
         TestRecord.put(36, intArray0);
     }
 
+<<<<<<< HEAD
     private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, Decoder decoder)
+=======
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         PrimitiveLongList longArray0 = null;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_1971822364_1672473580.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_1971822364_1672473580.java
index 015ae6741..6cfaa8cb6 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_1971822364_1672473580.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_1971822364_1672473580.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -19,6 +23,7 @@ public UNION_GenericDeserializer_1971822364_1672473580(Schema readerSchema) {
         this.recordRecordSchema0 = readerSchema.getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -26,6 +31,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_2018567528_1606337179.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_2018567528_1606337179.java
index 2aa1beb3d..8d91c50e4 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_2018567528_1606337179.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_2018567528_1606337179.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericArray;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,7 +27,11 @@ public UNION_GenericDeserializer_2018567528_1606337179(Schema readerSchema) {
         this.arrayArrayElemSchema0 = arrayArraySchema0 .getElementType();
     }
 
+<<<<<<< HEAD
     public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder)
+=======
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<IndexedRecord> array0 = null;
@@ -44,14 +52,22 @@ public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decode
                 if ((reuse) instanceof GenericArray) {
                     arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
                 }
+<<<<<<< HEAD
                 array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder)));
+=======
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             chunkLen0 = (decoder.arrayNext());
         }
         return array0;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_568621313_1223705675.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_568621313_1223705675.java
index 368ca98dc..0a08ef15c 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_568621313_1223705675.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UNION_GenericDeserializer_568621313_1223705675.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,12 +28,17 @@ public UNION_GenericDeserializer_568621313_1223705675(Schema readerSchema) {
         this.mapMapValueSchema0 = mapMapSchema0 .getValueType();
     }
 
+<<<<<<< HEAD
     public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder)
+=======
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<Utf8, IndexedRecord> map0 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, IndexedRecord> mapReuse0 = null;
             if ((reuse) instanceof Map) {
                 mapReuse0 = ((Map)(reuse));
@@ -39,21 +48,52 @@ public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Deco
                 map0 = mapReuse0;
             } else {
                 map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
                     Utf8 key0 = (decoder.readString(null));
+<<<<<<< HEAD
                     map0 .put(key0, deserializerecord0(null, (decoder)));
+=======
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             map0 = new HashMap<Utf8, IndexedRecord>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         return map0;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
index 41683188a..2b27c9a21 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.MyEnumV1;
 import com.linkedin.avro.fastserde.generated.avro.MyEnumV2;
 import com.linkedin.avroutil1.Enums;
@@ -19,6 +23,7 @@ public UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_13416
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder)
         throws IOException
     {
@@ -26,6 +31,15 @@ public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnum
     }
 
     public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeUnionOfRecordsWithSameNameEnumField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField UnionOfRecordsWithSameNameEnumField;
@@ -36,10 +50,17 @@ public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnum
         }
         int unionIndex0 = (decoder.readIndex());
         if (unionIndex0 == 0) {
+<<<<<<< HEAD
             UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder)));
         } else {
             if (unionIndex0 == 1) {
                 UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder)));
+=======
+            UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
             }
@@ -47,7 +68,11 @@ public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnum
         return UnionOfRecordsWithSameNameEnumField;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.MyRecordV1 MyRecordV1;
@@ -60,7 +85,11 @@ public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecord
         return MyRecordV1;
     }
 
+<<<<<<< HEAD
     public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder)
+=======
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         com.linkedin.avro.fastserde.generated.avro.MyRecordV2 MyRecordV2;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/recordName_GenericDeserializer_1743054079_1743054079.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/recordName_GenericDeserializer_1743054079_1743054079.java
index cc8f3086e..9722cf5b4 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/recordName_GenericDeserializer_1743054079_1743054079.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/recordName_GenericDeserializer_1743054079_1743054079.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -20,6 +24,7 @@ public recordName_GenericDeserializer_1743054079_1743054079(Schema readerSchema)
         this.unionField0 = readerSchema.getField("unionField").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecordName0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord recordName;
@@ -43,11 +57,19 @@ public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder)
             charSequence0 = (decoder).readString(null);
         }
         recordName.put(0, charSequence0);
+<<<<<<< HEAD
         populate_recordName0((recordName), (decoder));
         return recordName;
     }
 
     private void populate_recordName0(IndexedRecord recordName, Decoder decoder)
+=======
+        populate_recordName0((recordName), (customization), (decoder));
+        return recordName;
+    }
+
+    private void populate_recordName0(IndexedRecord recordName, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -56,7 +78,11 @@ private void populate_recordName0(IndexedRecord recordName, Decoder decoder)
             recordName.put(1, null);
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 recordName.put(1, deserializerecordName0(recordName.get(1), (decoder)));
+=======
+                recordName.put(1, deserializerecordName0(recordName.get(1), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
             }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1025741720_1557256887.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1025741720_1557256887.java
index 6224c4290..7cd2013ab 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1025741720_1557256887.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1025741720_1557256887.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,6 +27,7 @@ public record_GenericDeserializer_1025741720_1557256887(Schema readerSchema) {
         this.someInts0 = readerSchema.getField("someInts").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
@@ -46,6 +60,7 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                 Map<Utf8, Integer> someIntsOption0 = null;
                 long chunkLen0 = (decoder.readMapStart());
                 if (chunkLen0 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, Integer> someIntsOptionReuse0 = null;
                     Object oldMap0 = record.get(0);
                     if (oldMap0 instanceof Map) {
@@ -56,6 +71,22 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                         someIntsOption0 = someIntsOptionReuse0;
                     } else {
                         someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -74,7 +105,15 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                         chunkLen0 = (decoder.mapNext());
                     } while (chunkLen0 > 0);
                 } else {
+<<<<<<< HEAD
                     someIntsOption0 = new HashMap<Utf8, Integer>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 record.put(0, someIntsOption0);
             } else {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1126840752_2099305627.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1126840752_2099305627.java
index 4c47a76a1..38bae15ca 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1126840752_2099305627.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1126840752_2099305627.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -18,6 +22,7 @@ public record_GenericDeserializer_1126840752_2099305627(Schema readerSchema) {
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -25,6 +30,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1191367445_653449771.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1191367445_653449771.java
index ae69adb4a..b0ed38d09 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1191367445_653449771.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1191367445_653449771.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
@@ -22,6 +26,7 @@ public record_GenericDeserializer_1191367445_653449771(Schema readerSchema) {
         this.someInts0 = readerSchema.getField("someInts").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -29,6 +34,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1373882843_1971822364.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1373882843_1971822364.java
index a93e5083c..a907b46e1 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1373882843_1971822364.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1373882843_1971822364.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -17,6 +21,7 @@ public record_GenericDeserializer_1373882843_1971822364(Schema readerSchema) {
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -24,6 +29,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1556659421_711533897.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1556659421_711533897.java
index 3c6a0ba16..9617847b8 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1556659421_711533897.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1556659421_711533897.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -20,6 +24,7 @@ public record_GenericDeserializer_1556659421_711533897(Schema readerSchema) {
         this.subRecord0 = readerSchema.getField("subRecord").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -27,6 +32,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
@@ -40,7 +54,11 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
             throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"subRecord\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"subRecord\",\"fields\":[{\"name\":\"someInt1\",\"type\":\"int\",\"doc\":\"\"},{\"name\":\"someInt2\",\"type\":\"int\",\"doc\":\"\"}]}");
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 record.put(0, deserializesubRecord0(record.get(0), (decoder)));
+=======
+                record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex0));
             }
@@ -48,7 +66,11 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
         return record;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -58,11 +80,19 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
             subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
         }
         subRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_subRecord0((subRecord), (decoder));
         return subRecord;
     }
 
     private void populate_subRecord0(IndexedRecord subRecord, Decoder decoder)
+=======
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         subRecord.put(1, (decoder.readInt()));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1557256887_1025741720.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1557256887_1025741720.java
index bf4f60a0c..d10446eb0 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1557256887_1025741720.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1557256887_1025741720.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -26,6 +30,7 @@ public record_GenericDeserializer_1557256887_1025741720(Schema readerSchema) {
         this.someIntsMapValueSchema0 = someIntsMapSchema0 .getValueType();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -33,6 +38,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
@@ -44,6 +58,7 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
         Map<Utf8, Integer> someInts1 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Integer> someIntsReuse0 = null;
             Object oldMap0 = record.get(0);
             if (oldMap0 instanceof Map) {
@@ -54,6 +69,22 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                 someInts1 = someIntsReuse0;
             } else {
                 someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -63,7 +94,15 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             someInts1 = new HashMap<Utf8, Integer>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         record.put(0, someInts1);
         return record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1557256887_753570467.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1557256887_753570467.java
index f74b88097..701cceb59 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1557256887_753570467.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1557256887_753570467.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,6 +28,7 @@ public record_GenericDeserializer_1557256887_753570467(Schema readerSchema) {
         this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -31,6 +36,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
@@ -42,6 +56,7 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
         Map<Utf8, Integer> someInts1 = null;
         long chunkLen0 = (decoder.readMapStart());
         if (chunkLen0 > 0) {
+<<<<<<< HEAD
             Map<Utf8, Integer> someIntsReuse0 = null;
             Object oldMap0 = record.get(0);
             if (oldMap0 instanceof Map) {
@@ -52,6 +67,22 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                 someInts1 = someIntsReuse0;
             } else {
                 someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
             do {
                 for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -61,7 +92,15 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                 chunkLen0 = (decoder.mapNext());
             } while (chunkLen0 > 0);
         } else {
+<<<<<<< HEAD
             someInts1 = new HashMap<Utf8, Integer>(0);
+=======
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         }
         record.put(0, someInts1);
         return record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1672473580_1971822364.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1672473580_1971822364.java
index 34b30b0b5..eb9c39d8d 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1672473580_1971822364.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1672473580_1971822364.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -18,7 +22,11 @@ public record_GenericDeserializer_1672473580_1971822364(Schema readerSchema) {
         this.readerSchema = readerSchema;
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int unionIndex0 = (decoder.readIndex());
@@ -26,14 +34,22 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
             throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}");
         } else {
             if (unionIndex0 == 1) {
+<<<<<<< HEAD
                 return deserializerecord0((reuse), (decoder));
+=======
+                return deserializerecord0((reuse), (decoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
             }
         }
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1971822364_1373882843.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1971822364_1373882843.java
index 65297d224..15c1169ca 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1971822364_1373882843.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_1971822364_1373882843.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -19,6 +23,7 @@ public record_GenericDeserializer_1971822364_1373882843(Schema readerSchema) {
         this.someInt0 = readerSchema.getField("someInt").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -26,6 +31,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_653449771_1191367445.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_653449771_1191367445.java
index 5d235c52a..89c2755bd 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_653449771_1191367445.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_653449771_1191367445.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,6 +27,7 @@ public record_GenericDeserializer_653449771_1191367445(Schema readerSchema) {
         this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_653449771_813379571.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_653449771_813379571.java
index 7f229c2e6..6ce4a9533 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_653449771_813379571.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_653449771_813379571.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -24,6 +28,7 @@ public record_GenericDeserializer_653449771_813379571(Schema readerSchema) {
         this.someIntsArrayElemSchema0 = someIntsArraySchema0 .getElementType();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -31,6 +36,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_711533897_1556659421.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_711533897_1556659421.java
index 57c1517b4..69aeb45ab 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_711533897_1556659421.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_711533897_1556659421.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Decoder;
@@ -21,6 +25,7 @@ public record_GenericDeserializer_711533897_1556659421(Schema readerSchema) {
         this.subRecordRecordSchema0 = subRecord0 .getTypes().get(1);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -28,6 +33,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
@@ -36,11 +50,19 @@ record = ((IndexedRecord)(reuse));
         } else {
             record = new org.apache.avro.generic.GenericData.Record(readerSchema);
         }
+<<<<<<< HEAD
         record.put(0, deserializesubRecord0(record.get(0), (decoder)));
         return record;
     }
 
     public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
+=======
+        record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord subRecord;
@@ -50,11 +72,19 @@ public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder)
             subRecord = new org.apache.avro.generic.GenericData.Record(subRecordRecordSchema0);
         }
         subRecord.put(0, (decoder.readInt()));
+<<<<<<< HEAD
         populate_subRecord0((subRecord), (decoder));
         return subRecord;
     }
 
     private void populate_subRecord0(IndexedRecord subRecord, Decoder decoder)
+=======
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         subRecord.put(1, (decoder.readInt()));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_753570467_1557256887.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_753570467_1557256887.java
index 693567e25..45495acf3 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_753570467_1557256887.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_753570467_1557256887.java
@@ -5,6 +5,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -23,6 +27,7 @@ public record_GenericDeserializer_753570467_1557256887(Schema readerSchema) {
         this.someInts0 = readerSchema.getField("someInts").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
@@ -46,6 +60,7 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                 Map<Utf8, Integer> someIntsOption0 = null;
                 long chunkLen0 = (decoder.readMapStart());
                 if (chunkLen0 > 0) {
+<<<<<<< HEAD
                     Map<Utf8, Integer> someIntsOptionReuse0 = null;
                     Object oldMap0 = record.get(0);
                     if (oldMap0 instanceof Map) {
@@ -56,6 +71,22 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                         someIntsOption0 = someIntsOptionReuse0;
                     } else {
                         someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                     do {
                         for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
@@ -65,7 +96,15 @@ record = new org.apache.avro.generic.GenericData.Record(readerSchema);
                         chunkLen0 = (decoder.mapNext());
                     } while (chunkLen0 > 0);
                 } else {
+<<<<<<< HEAD
                     someIntsOption0 = new HashMap<Utf8, Integer>(0);
+=======
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
                 record.put(0, someIntsOption0);
             } else {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_813379571_653449771.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_813379571_653449771.java
index ea4ff8093..72f8d19ca 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_813379571_653449771.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/record_GenericDeserializer_813379571_653449771.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
@@ -23,6 +27,7 @@ public record_GenericDeserializer_813379571_653449771(Schema readerSchema) {
         this.someInts0 = readerSchema.getField("someInts").schema();
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -30,6 +35,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializerecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/testRecord_GenericDeserializer_1146484089_1256982207.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/testRecord_GenericDeserializer_1146484089_1256982207.java
index 5f36ad64b..460846579 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/testRecord_GenericDeserializer_1146484089_1256982207.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_11/testRecord_GenericDeserializer_1146484089_1256982207.java
@@ -6,6 +6,10 @@
 import java.util.HashMap;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastDeserializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.AvroTypeException;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericEnumSymbol;
@@ -30,6 +34,7 @@ public testRecord_GenericDeserializer_1146484089_1256982207(Schema readerSchema)
         this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
     }
 
+<<<<<<< HEAD
     public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
         throws IOException
     {
@@ -37,6 +42,15 @@ public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder)
     }
 
     public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder)
+=======
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializetestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord testRecord;
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_BOOLEAN_GenericSerializer_869749973.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_BOOLEAN_GenericSerializer_869749973.java
index e4dd3fc12..328559a7f 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_BOOLEAN_GenericSerializer_869749973.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_BOOLEAN_GenericSerializer_869749973.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import com.linkedin.avro.api.PrimitiveBooleanList;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.io.Encoder;
 
 public class Array_of_BOOLEAN_GenericSerializer_869749973
@@ -12,7 +16,11 @@ public class Array_of_BOOLEAN_GenericSerializer_869749973
 {
 
 
+<<<<<<< HEAD
     public void serialize(List<Boolean> data, Encoder encoder)
+=======
+    public void serialize(List<Boolean> data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeArrayStart();
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_DOUBLE_GenericSerializer_18760307.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_DOUBLE_GenericSerializer_18760307.java
index 48816d57e..621c75486 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_DOUBLE_GenericSerializer_18760307.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_DOUBLE_GenericSerializer_18760307.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import com.linkedin.avro.api.PrimitiveDoubleList;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.io.Encoder;
 
 public class Array_of_DOUBLE_GenericSerializer_18760307
@@ -12,7 +16,11 @@ public class Array_of_DOUBLE_GenericSerializer_18760307
 {
 
 
+<<<<<<< HEAD
     public void serialize(List<Double> data, Encoder encoder)
+=======
+    public void serialize(List<Double> data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeArrayStart();
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_FLOAT_GenericSerializer_1012670397.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_FLOAT_GenericSerializer_1012670397.java
index 52bb9253b..ed4b0fa73 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_FLOAT_GenericSerializer_1012670397.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_FLOAT_GenericSerializer_1012670397.java
@@ -6,6 +6,10 @@
 import com.linkedin.avro.api.PrimitiveFloatList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.io.Encoder;
 
 public class Array_of_FLOAT_GenericSerializer_1012670397
@@ -13,7 +17,11 @@ public class Array_of_FLOAT_GenericSerializer_1012670397
 {
 
 
+<<<<<<< HEAD
     public void serialize(List<Float> data, Encoder encoder)
+=======
+    public void serialize(List<Float> data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeArrayStart();
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_INT_GenericSerializer_1012089072.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_INT_GenericSerializer_1012089072.java
index 8185166fd..bebd8704d 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_INT_GenericSerializer_1012089072.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_INT_GenericSerializer_1012089072.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.io.Encoder;
 
 public class Array_of_INT_GenericSerializer_1012089072
@@ -12,7 +16,11 @@ public class Array_of_INT_GenericSerializer_1012089072
 {
 
 
+<<<<<<< HEAD
     public void serialize(List<Integer> data, Encoder encoder)
+=======
+    public void serialize(List<Integer> data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeArrayStart();
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_LONG_GenericSerializer_325099267.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_LONG_GenericSerializer_325099267.java
index efccd52e4..131f38714 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_LONG_GenericSerializer_325099267.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_LONG_GenericSerializer_325099267.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import com.linkedin.avro.api.PrimitiveLongList;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.io.Encoder;
 
 public class Array_of_LONG_GenericSerializer_325099267
@@ -12,7 +16,11 @@ public class Array_of_LONG_GenericSerializer_325099267
 {
 
 
+<<<<<<< HEAD
     public void serialize(List<Long> data, Encoder encoder)
+=======
+    public void serialize(List<Long> data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeArrayStart();
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_UNION_GenericSerializer_777827233.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_UNION_GenericSerializer_777827233.java
index b34eb1e05..eb90c02aa 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_UNION_GenericSerializer_777827233.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_UNION_GenericSerializer_777827233.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -13,7 +17,11 @@ public class Array_of_UNION_GenericSerializer_777827233
 {
 
 
+<<<<<<< HEAD
     public void serialize(List<IndexedRecord> data, Encoder encoder)
+=======
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeArrayStart();
@@ -31,7 +39,11 @@ public void serialize(List<IndexedRecord> data, Encoder encoder)
                 } else {
                     if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
                         (encoder).writeIndex(1);
+<<<<<<< HEAD
                         serializeRecord0(((IndexedRecord) union0), (encoder));
+=======
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                 }
             }
@@ -40,7 +52,11 @@ public void serialize(List<IndexedRecord> data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     public void serializeRecord0(IndexedRecord data, Encoder encoder)
+=======
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence field0 = ((CharSequence) data.get(0));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_record_GenericSerializer_477614132.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_record_GenericSerializer_477614132.java
index 8aa0633f7..f55fcd687 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_record_GenericSerializer_477614132.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Array_of_record_GenericSerializer_477614132.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -13,7 +17,11 @@ public class Array_of_record_GenericSerializer_477614132
 {
 
 
+<<<<<<< HEAD
     public void serialize(List<IndexedRecord> data, Encoder encoder)
+=======
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeArrayStart();
@@ -25,14 +33,22 @@ public void serialize(List<IndexedRecord> data, Encoder encoder)
                 (encoder).startItem();
                 IndexedRecord record0 = null;
                 record0 = ((List<IndexedRecord> ) data).get(counter0);
+<<<<<<< HEAD
                 serializeRecord0(record0, (encoder));
+=======
+                serializeRecord0(record0, (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
         }
         (encoder).writeArrayEnd();
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     public void serializeRecord0(IndexedRecord data, Encoder encoder)
+=======
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence field0 = ((CharSequence) data.get(0));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
index 015350bae..3ac059366 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 
@@ -11,6 +15,7 @@ public class FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_Gener
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -526,6 +531,523 @@ public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeReco
 
     @SuppressWarnings("unchecked")
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(1)));
@@ -533,7 +1055,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(3)));
@@ -541,7 +1067,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(5)));
@@ -549,7 +1079,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(7)));
@@ -557,7 +1091,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(9)));
@@ -565,7 +1103,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(11)));
@@ -573,7 +1115,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(13)));
@@ -581,7 +1127,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(15)));
@@ -589,7 +1139,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(17)));
@@ -597,7 +1151,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(19)));
@@ -605,7 +1163,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(21)));
@@ -613,7 +1175,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(23)));
@@ -621,7 +1187,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(25)));
@@ -629,7 +1199,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(27)));
@@ -637,7 +1211,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(29)));
@@ -645,7 +1223,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(31)));
@@ -653,7 +1235,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(33)));
@@ -661,7 +1247,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(35)));
@@ -669,7 +1259,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(37)));
@@ -677,7 +1271,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(39)));
@@ -685,7 +1283,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(41)));
@@ -693,7 +1295,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(43)));
@@ -701,7 +1307,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(45)));
@@ -709,7 +1319,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(47)));
@@ -717,7 +1331,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(49)));
@@ -725,7 +1343,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(51)));
@@ -733,7 +1355,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(53)));
@@ -741,7 +1367,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(55)));
@@ -749,7 +1379,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(57)));
@@ -757,7 +1391,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(59)));
@@ -765,7 +1403,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(61)));
@@ -773,7 +1415,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(63)));
@@ -781,7 +1427,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(65)));
@@ -789,7 +1439,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(67)));
@@ -797,7 +1451,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(69)));
@@ -805,7 +1463,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(71)));
@@ -813,7 +1475,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(73)));
@@ -821,7 +1487,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(75)));
@@ -829,7 +1499,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(77)));
@@ -837,7 +1511,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(79)));
@@ -845,7 +1523,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(81)));
@@ -853,7 +1535,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(83)));
@@ -861,7 +1547,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(85)));
@@ -869,7 +1559,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(87)));
@@ -877,7 +1571,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(89)));
@@ -885,7 +1583,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(91)));
@@ -893,7 +1595,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(93)));
@@ -901,7 +1607,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(95)));
@@ -909,7 +1619,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(97)));
@@ -917,7 +1631,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(99)));
@@ -925,7 +1643,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(101)));
@@ -933,7 +1655,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(103)));
@@ -941,7 +1667,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(105)));
@@ -949,7 +1679,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(107)));
@@ -957,7 +1691,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(109)));
@@ -965,7 +1703,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(111)));
@@ -973,7 +1715,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(113)));
@@ -981,7 +1727,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(115)));
@@ -989,7 +1739,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(117)));
@@ -997,7 +1751,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(119)));
@@ -1005,7 +1763,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(121)));
@@ -1013,7 +1775,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(123)));
@@ -1021,7 +1787,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(125)));
@@ -1029,7 +1799,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(127)));
@@ -1037,7 +1811,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(129)));
@@ -1045,7 +1823,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(131)));
@@ -1053,7 +1835,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(133)));
@@ -1061,7 +1847,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(135)));
@@ -1069,7 +1859,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(137)));
@@ -1077,7 +1871,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(139)));
@@ -1085,7 +1883,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(141)));
@@ -1093,7 +1895,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(143)));
@@ -1101,7 +1907,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(145)));
@@ -1109,7 +1919,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(147)));
@@ -1117,7 +1931,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(149)));
@@ -1125,7 +1943,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(151)));
@@ -1133,7 +1955,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(153)));
@@ -1141,7 +1967,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(155)));
@@ -1149,7 +1979,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(157)));
@@ -1157,7 +1991,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(159)));
@@ -1165,7 +2003,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(161)));
@@ -1173,7 +2015,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(163)));
@@ -1181,7 +2027,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(165)));
@@ -1189,7 +2039,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(167)));
@@ -1197,7 +2051,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(169)));
@@ -1205,7 +2063,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(171)));
@@ -1213,7 +2075,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(173)));
@@ -1221,7 +2087,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(175)));
@@ -1229,7 +2099,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(177)));
@@ -1237,7 +2111,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(179)));
@@ -1245,7 +2123,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(181)));
@@ -1253,7 +2135,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(183)));
@@ -1261,7 +2147,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(185)));
@@ -1269,7 +2159,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(187)));
@@ -1277,7 +2171,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(189)));
@@ -1285,7 +2183,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(191)));
@@ -1293,7 +2195,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(193)));
@@ -1301,7 +2207,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(195)));
@@ -1309,7 +2219,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(197)));
@@ -1317,7 +2231,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(199)));
@@ -1325,7 +2243,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(201)));
@@ -1333,7 +2255,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(203)));
@@ -1341,7 +2267,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(205)));
@@ -1349,7 +2279,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(207)));
@@ -1357,7 +2291,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(209)));
@@ -1365,7 +2303,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(211)));
@@ -1373,7 +2315,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(213)));
@@ -1381,7 +2327,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(215)));
@@ -1389,7 +2339,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(217)));
@@ -1397,7 +2351,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(219)));
@@ -1405,7 +2363,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(221)));
@@ -1413,7 +2375,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(223)));
@@ -1421,7 +2387,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(225)));
@@ -1429,7 +2399,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(227)));
@@ -1437,7 +2411,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(229)));
@@ -1445,7 +2423,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(231)));
@@ -1453,7 +2435,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(233)));
@@ -1461,7 +2447,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(235)));
@@ -1469,7 +2459,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(237)));
@@ -1477,7 +2471,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(239)));
@@ -1485,7 +2483,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(241)));
@@ -1493,7 +2495,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(243)));
@@ -1501,7 +2507,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(245)));
@@ -1509,7 +2519,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(247)));
@@ -1517,7 +2531,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(249)));
@@ -1525,7 +2543,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(251)));
@@ -1533,7 +2555,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(253)));
@@ -1541,7 +2567,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(255)));
@@ -1549,7 +2579,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(257)));
@@ -1557,7 +2591,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(259)));
@@ -1565,7 +2603,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(261)));
@@ -1573,7 +2615,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(263)));
@@ -1581,7 +2627,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(265)));
@@ -1589,7 +2639,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(267)));
@@ -1597,7 +2651,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(269)));
@@ -1605,7 +2663,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(271)));
@@ -1613,7 +2675,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(273)));
@@ -1621,7 +2687,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(275)));
@@ -1629,7 +2699,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(277)));
@@ -1637,7 +2711,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(279)));
@@ -1645,7 +2723,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(281)));
@@ -1653,7 +2735,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(283)));
@@ -1661,7 +2747,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(285)));
@@ -1669,7 +2759,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(287)));
@@ -1677,7 +2771,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(289)));
@@ -1685,7 +2783,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(291)));
@@ -1693,7 +2795,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(293)));
@@ -1701,7 +2807,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(295)));
@@ -1709,7 +2819,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(297)));
@@ -1717,7 +2831,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(299)));
@@ -1725,7 +2843,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(301)));
@@ -1733,7 +2855,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(303)));
@@ -1741,7 +2867,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(305)));
@@ -1749,7 +2879,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(307)));
@@ -1757,7 +2891,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(309)));
@@ -1765,7 +2903,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(311)));
@@ -1773,7 +2915,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(313)));
@@ -1781,7 +2927,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(315)));
@@ -1789,7 +2939,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(317)));
@@ -1797,7 +2951,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(319)));
@@ -1805,7 +2963,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(321)));
@@ -1813,7 +2975,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(323)));
@@ -1821,7 +2987,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(325)));
@@ -1829,7 +2999,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(327)));
@@ -1837,7 +3011,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(329)));
@@ -1845,7 +3023,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(331)));
@@ -1853,7 +3035,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(333)));
@@ -1861,7 +3047,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(335)));
@@ -1869,7 +3059,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(337)));
@@ -1877,7 +3071,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(339)));
@@ -1885,7 +3083,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(341)));
@@ -1893,7 +3095,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(343)));
@@ -1901,7 +3107,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(345)));
@@ -1909,7 +3119,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(347)));
@@ -1917,7 +3131,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(349)));
@@ -1925,7 +3143,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(351)));
@@ -1933,7 +3155,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(353)));
@@ -1941,7 +3167,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(355)));
@@ -1949,7 +3179,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(357)));
@@ -1957,7 +3191,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(359)));
@@ -1965,7 +3203,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(361)));
@@ -1973,7 +3215,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(363)));
@@ -1981,7 +3227,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(365)));
@@ -1989,7 +3239,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(367)));
@@ -1997,7 +3251,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(369)));
@@ -2005,7 +3263,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(371)));
@@ -2013,7 +3275,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(373)));
@@ -2021,7 +3287,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(375)));
@@ -2029,7 +3299,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(377)));
@@ -2037,7 +3311,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(379)));
@@ -2045,7 +3323,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(381)));
@@ -2053,7 +3335,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(383)));
@@ -2061,7 +3347,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(385)));
@@ -2069,7 +3359,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(387)));
@@ -2077,7 +3371,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(389)));
@@ -2085,7 +3383,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(391)));
@@ -2093,7 +3395,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(393)));
@@ -2101,7 +3407,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(395)));
@@ -2109,7 +3419,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(397)));
@@ -2117,7 +3431,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(399)));
@@ -2125,7 +3443,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(401)));
@@ -2133,7 +3455,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(403)));
@@ -2141,7 +3467,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(405)));
@@ -2149,7 +3479,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(407)));
@@ -2157,7 +3491,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(409)));
@@ -2165,7 +3503,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(411)));
@@ -2173,7 +3515,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(413)));
@@ -2181,7 +3527,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(415)));
@@ -2189,7 +3539,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(417)));
@@ -2197,7 +3551,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(419)));
@@ -2205,7 +3563,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(421)));
@@ -2213,7 +3575,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(423)));
@@ -2221,7 +3587,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(425)));
@@ -2229,7 +3599,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(427)));
@@ -2237,7 +3611,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(429)));
@@ -2245,7 +3623,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(431)));
@@ -2253,7 +3635,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(433)));
@@ -2261,7 +3647,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(435)));
@@ -2269,7 +3659,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(437)));
@@ -2277,7 +3671,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(439)));
@@ -2285,7 +3683,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(441)));
@@ -2293,7 +3695,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(443)));
@@ -2301,7 +3707,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(445)));
@@ -2309,7 +3719,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(447)));
@@ -2317,7 +3731,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(449)));
@@ -2325,7 +3743,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(451)));
@@ -2333,7 +3755,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(453)));
@@ -2341,7 +3767,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(455)));
@@ -2349,7 +3779,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(457)));
@@ -2357,7 +3791,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(459)));
@@ -2365,7 +3803,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(461)));
@@ -2373,7 +3815,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(463)));
@@ -2381,7 +3827,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(465)));
@@ -2389,7 +3839,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(467)));
@@ -2397,7 +3851,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(469)));
@@ -2405,7 +3863,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(471)));
@@ -2413,7 +3875,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(473)));
@@ -2421,7 +3887,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(475)));
@@ -2429,7 +3899,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(477)));
@@ -2437,7 +3911,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(479)));
@@ -2445,7 +3923,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(481)));
@@ -2453,7 +3935,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(483)));
@@ -2461,7 +3947,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(485)));
@@ -2469,7 +3959,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(487)));
@@ -2477,7 +3971,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(489)));
@@ -2485,7 +3983,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(491)));
@@ -2493,7 +3995,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(493)));
@@ -2501,7 +4007,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(495)));
@@ -2509,7 +4019,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(497)));
@@ -2517,7 +4031,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(499)));
@@ -2525,7 +4043,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(501)));
@@ -2533,7 +4055,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(503)));
@@ -2541,7 +4067,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(505)));
@@ -2549,7 +4079,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(507)));
@@ -2557,7 +4091,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(509)));
@@ -2565,7 +4103,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(511)));
@@ -2573,7 +4115,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(513)));
@@ -2581,7 +4127,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(515)));
@@ -2589,7 +4139,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(517)));
@@ -2597,7 +4151,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(519)));
@@ -2605,7 +4163,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(521)));
@@ -2613,7 +4175,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(523)));
@@ -2621,7 +4187,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(525)));
@@ -2629,7 +4199,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(527)));
@@ -2637,7 +4211,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(529)));
@@ -2645,7 +4223,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(531)));
@@ -2653,7 +4235,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(533)));
@@ -2661,7 +4247,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(535)));
@@ -2669,7 +4259,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(537)));
@@ -2677,7 +4271,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(539)));
@@ -2685,7 +4283,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(541)));
@@ -2693,7 +4295,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(543)));
@@ -2701,7 +4307,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(545)));
@@ -2709,7 +4319,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(547)));
@@ -2717,7 +4331,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(549)));
@@ -2725,7 +4343,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(551)));
@@ -2733,7 +4355,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(553)));
@@ -2741,7 +4367,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(555)));
@@ -2749,7 +4379,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(557)));
@@ -2757,7 +4391,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(559)));
@@ -2765,7 +4403,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(561)));
@@ -2773,7 +4415,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(563)));
@@ -2781,7 +4427,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(565)));
@@ -2789,7 +4439,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(567)));
@@ -2797,7 +4451,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(569)));
@@ -2805,7 +4463,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(571)));
@@ -2813,7 +4475,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(573)));
@@ -2821,7 +4487,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(575)));
@@ -2829,7 +4499,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(577)));
@@ -2837,7 +4511,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(579)));
@@ -2845,7 +4523,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(581)));
@@ -2853,7 +4535,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(583)));
@@ -2861,7 +4547,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(585)));
@@ -2869,7 +4559,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(587)));
@@ -2877,7 +4571,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(589)));
@@ -2885,7 +4583,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(591)));
@@ -2893,7 +4595,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(593)));
@@ -2901,7 +4607,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(595)));
@@ -2909,7 +4619,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(597)));
@@ -2917,7 +4631,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(599)));
@@ -2925,7 +4643,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(601)));
@@ -2933,7 +4655,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(603)));
@@ -2941,7 +4667,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(605)));
@@ -2949,7 +4679,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(607)));
@@ -2957,7 +4691,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(609)));
@@ -2965,7 +4703,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(611)));
@@ -2973,7 +4715,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(613)));
@@ -2981,7 +4727,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(615)));
@@ -2989,7 +4739,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(617)));
@@ -2997,7 +4751,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(619)));
@@ -3005,7 +4763,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(621)));
@@ -3013,7 +4775,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(623)));
@@ -3021,7 +4787,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(625)));
@@ -3029,7 +4799,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(627)));
@@ -3037,7 +4811,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(629)));
@@ -3045,7 +4823,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(631)));
@@ -3053,7 +4835,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(633)));
@@ -3061,7 +4847,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(635)));
@@ -3069,7 +4859,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(637)));
@@ -3077,7 +4871,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(639)));
@@ -3085,7 +4883,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(641)));
@@ -3093,7 +4895,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(643)));
@@ -3101,7 +4907,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(645)));
@@ -3109,7 +4919,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(647)));
@@ -3117,7 +4931,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(649)));
@@ -3125,7 +4943,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(651)));
@@ -3133,7 +4955,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(653)));
@@ -3141,7 +4967,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(655)));
@@ -3149,7 +4979,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(657)));
@@ -3157,7 +4991,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(659)));
@@ -3165,7 +5003,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(661)));
@@ -3173,7 +5015,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(663)));
@@ -3181,7 +5027,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(665)));
@@ -3189,7 +5039,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(667)));
@@ -3197,7 +5051,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(669)));
@@ -3205,7 +5063,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(671)));
@@ -3213,7 +5075,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(673)));
@@ -3221,7 +5087,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(675)));
@@ -3229,7 +5099,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(677)));
@@ -3237,7 +5111,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(679)));
@@ -3245,7 +5123,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(681)));
@@ -3253,7 +5135,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(683)));
@@ -3261,7 +5147,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(685)));
@@ -3269,7 +5159,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(687)));
@@ -3277,7 +5171,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(689)));
@@ -3285,7 +5183,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(691)));
@@ -3293,7 +5195,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(693)));
@@ -3301,7 +5207,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(695)));
@@ -3309,7 +5219,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(697)));
@@ -3317,7 +5231,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(699)));
@@ -3325,7 +5243,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(701)));
@@ -3333,7 +5255,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(703)));
@@ -3341,7 +5267,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(705)));
@@ -3349,7 +5279,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(707)));
@@ -3357,7 +5291,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(709)));
@@ -3365,7 +5303,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(711)));
@@ -3373,7 +5315,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(713)));
@@ -3381,7 +5327,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(715)));
@@ -3389,7 +5339,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(717)));
@@ -3397,7 +5351,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(719)));
@@ -3405,7 +5363,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(721)));
@@ -3413,7 +5375,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(723)));
@@ -3421,7 +5387,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(725)));
@@ -3429,7 +5399,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(727)));
@@ -3437,7 +5411,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(729)));
@@ -3445,7 +5423,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(731)));
@@ -3453,7 +5435,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(733)));
@@ -3461,7 +5447,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(735)));
@@ -3469,7 +5459,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(737)));
@@ -3477,7 +5471,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(739)));
@@ -3485,7 +5483,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(741)));
@@ -3493,7 +5495,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(743)));
@@ -3501,7 +5507,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(745)));
@@ -3509,7 +5519,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(747)));
@@ -3517,7 +5531,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(749)));
@@ -3525,7 +5543,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(751)));
@@ -3533,7 +5555,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(753)));
@@ -3541,7 +5567,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(755)));
@@ -3549,7 +5579,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(757)));
@@ -3557,7 +5591,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(759)));
@@ -3565,7 +5603,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(761)));
@@ -3573,7 +5615,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(763)));
@@ -3581,7 +5627,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(765)));
@@ -3589,7 +5639,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(767)));
@@ -3597,7 +5651,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(769)));
@@ -3605,7 +5663,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(771)));
@@ -3613,7 +5675,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(773)));
@@ -3621,7 +5687,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(775)));
@@ -3629,7 +5699,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(777)));
@@ -3637,7 +5711,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(779)));
@@ -3645,7 +5723,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(781)));
@@ -3653,7 +5735,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(783)));
@@ -3661,7 +5747,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(785)));
@@ -3669,7 +5759,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(787)));
@@ -3677,7 +5771,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(789)));
@@ -3685,7 +5783,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(791)));
@@ -3693,7 +5795,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(793)));
@@ -3701,7 +5807,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(795)));
@@ -3709,7 +5819,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(797)));
@@ -3717,7 +5831,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(799)));
@@ -3725,7 +5843,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(801)));
@@ -3733,7 +5855,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(803)));
@@ -3741,7 +5867,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(805)));
@@ -3749,7 +5879,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(807)));
@@ -3757,7 +5891,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(809)));
@@ -3765,7 +5903,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(811)));
@@ -3773,7 +5915,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(813)));
@@ -3781,7 +5927,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(815)));
@@ -3789,7 +5939,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(817)));
@@ -3797,7 +5951,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(819)));
@@ -3805,7 +5963,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(821)));
@@ -3813,7 +5975,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(823)));
@@ -3821,7 +5987,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(825)));
@@ -3829,7 +5999,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(827)));
@@ -3837,7 +6011,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(829)));
@@ -3845,7 +6023,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(831)));
@@ -3853,7 +6035,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(833)));
@@ -3861,7 +6047,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(835)));
@@ -3869,7 +6059,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(837)));
@@ -3877,7 +6071,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(839)));
@@ -3885,7 +6083,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(841)));
@@ -3893,7 +6095,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(843)));
@@ -3901,7 +6107,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(845)));
@@ -3909,7 +6119,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(847)));
@@ -3917,7 +6131,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(849)));
@@ -3925,7 +6143,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(851)));
@@ -3933,7 +6155,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(853)));
@@ -3941,7 +6167,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(855)));
@@ -3949,7 +6179,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(857)));
@@ -3957,7 +6191,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(859)));
@@ -3965,7 +6203,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(861)));
@@ -3973,7 +6215,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(863)));
@@ -3981,7 +6227,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(865)));
@@ -3989,7 +6239,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(867)));
@@ -3997,7 +6251,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(869)));
@@ -4005,7 +6263,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(871)));
@@ -4013,7 +6275,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(873)));
@@ -4021,7 +6287,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(875)));
@@ -4029,7 +6299,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(877)));
@@ -4037,7 +6311,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(879)));
@@ -4045,7 +6323,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(881)));
@@ -4053,7 +6335,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(883)));
@@ -4061,7 +6347,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(885)));
@@ -4069,7 +6359,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(887)));
@@ -4077,7 +6371,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(889)));
@@ -4085,7 +6383,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(891)));
@@ -4093,7 +6395,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(893)));
@@ -4101,7 +6407,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(895)));
@@ -4109,7 +6419,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(897)));
@@ -4117,7 +6431,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(899)));
@@ -4125,7 +6443,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(901)));
@@ -4133,7 +6455,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(903)));
@@ -4141,7 +6467,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(905)));
@@ -4149,7 +6479,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(907)));
@@ -4157,7 +6491,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(909)));
@@ -4165,7 +6503,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(911)));
@@ -4173,7 +6515,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(913)));
@@ -4181,7 +6527,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(915)));
@@ -4189,7 +6539,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(917)));
@@ -4197,7 +6551,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(919)));
@@ -4205,7 +6563,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(921)));
@@ -4213,7 +6575,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(923)));
@@ -4221,7 +6587,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(925)));
@@ -4229,7 +6599,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(927)));
@@ -4237,7 +6611,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(929)));
@@ -4245,7 +6623,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(931)));
@@ -4253,7 +6635,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(933)));
@@ -4261,7 +6647,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(935)));
@@ -4269,7 +6659,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(937)));
@@ -4277,7 +6671,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(939)));
@@ -4285,7 +6683,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(941)));
@@ -4293,7 +6695,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(943)));
@@ -4301,7 +6707,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(945)));
@@ -4309,7 +6719,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(947)));
@@ -4317,7 +6731,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(949)));
@@ -4325,7 +6743,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(951)));
@@ -4333,7 +6755,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(953)));
@@ -4341,7 +6767,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(955)));
@@ -4349,7 +6779,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(957)));
@@ -4357,7 +6791,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(959)));
@@ -4365,7 +6803,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(961)));
@@ -4373,7 +6815,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(963)));
@@ -4381,7 +6827,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(965)));
@@ -4389,7 +6839,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(967)));
@@ -4397,7 +6851,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(969)));
@@ -4405,7 +6863,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(971)));
@@ -4413,7 +6875,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(973)));
@@ -4421,7 +6887,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(975)));
@@ -4429,7 +6899,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(977)));
@@ -4437,7 +6911,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(979)));
@@ -4445,7 +6923,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(981)));
@@ -4453,7 +6935,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(983)));
@@ -4461,7 +6947,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(985)));
@@ -4469,7 +6959,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(987)));
@@ -4477,7 +6971,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(989)));
@@ -4485,7 +6983,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(991)));
@@ -4493,7 +6995,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(993)));
@@ -4501,7 +7007,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(995)));
@@ -4509,7 +7019,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(997)));
@@ -4517,7 +7031,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRe
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(999)));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
index 66f7bc80c..95b814683 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.GenericEnumSymbol;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
@@ -13,6 +17,7 @@ public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnum
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -21,6 +26,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int valueToWrite0;
@@ -31,12 +46,21 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecord
             valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
         }
         (encoder).writeEnum(valueToWrite0);
+<<<<<<< HEAD
         serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder));
         serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder)
+=======
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         GenericEnumSymbol testEnumUnion0 = ((GenericEnumSymbol) data.get(1));
@@ -78,7 +102,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericReco
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericEnumSymbol> testEnumUnionArray0 = ((List<GenericEnumSymbol> ) data.get(3));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
index 5fce5b2df..849ca7496 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.GenericFixed;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
@@ -13,6 +17,7 @@ public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixe
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -30,6 +35,25 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecord
 
     @SuppressWarnings("unchecked")
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         GenericFixed testFixedUnion0 = ((GenericFixed) data.get(1));
@@ -57,7 +81,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericReco
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> testFixedUnionArray0 = ((List<GenericFixed> ) data.get(3));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
index f99a1a390..f03c7a8b7 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -12,6 +16,7 @@ public class FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_G
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -20,6 +25,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object union0 = ((Object) data.get(0));
@@ -29,7 +44,11 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoic
         } else {
             if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
                 (encoder).writeIndex(1);
+<<<<<<< HEAD
                 serializeSubRecord0(((IndexedRecord) union0), (encoder));
+=======
+                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             } else {
                 if (union0 instanceof CharSequence) {
                     (encoder).writeIndex(2);
@@ -49,7 +68,11 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoic
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     public void serializeSubRecord0(IndexedRecord data, Encoder encoder)
+=======
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence subField0 = ((CharSequence) data.get(0));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
index 5a6e2cf33..80ca6ccb8 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.nio.ByteBuffer;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -13,6 +17,7 @@ public class FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSer
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -35,6 +40,30 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(I
 
     @SuppressWarnings("unchecked")
     private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Integer testIntUnion0 = ((Integer) data.get(1));
@@ -56,7 +85,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         if (((CharSequence) data.get(3)) instanceof Utf8) {
@@ -79,7 +112,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeLong(((Long) data.get(5)));
@@ -94,7 +131,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeDouble(((Double) data.get(7)));
@@ -109,7 +150,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeFloat(((Float) data.get(9)));
@@ -124,7 +169,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeBoolean(((Boolean) data.get(11)));
@@ -139,7 +188,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeBytes(((ByteBuffer) data.get(13)));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
index 09834ebc2..3fc592a16 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -12,6 +16,7 @@ public class FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_Gener
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -20,6 +25,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object union_field0 = ((Object) data.get(0));
@@ -29,18 +44,30 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionInd
         } else {
             if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record1".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
                 (encoder).writeIndex(1);
+<<<<<<< HEAD
                 serializeRecord10(((IndexedRecord) union_field0), (encoder));
             } else {
                 if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
                     (encoder).writeIndex(2);
                     serializeRecord20(((IndexedRecord) union_field0), (encoder));
+=======
+                serializeRecord10(((IndexedRecord) union_field0), (encoder), (customization));
+            } else {
+                if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                    (encoder).writeIndex(2);
+                    serializeRecord20(((IndexedRecord) union_field0), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 }
             }
         }
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     public void serializeRecord10(IndexedRecord data, Encoder encoder)
+=======
+    public void serializeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         if (((CharSequence) data.get(0)) instanceof Utf8) {
@@ -51,7 +78,11 @@ public void serializeRecord10(IndexedRecord data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     public void serializeRecord20(IndexedRecord data, Encoder encoder)
+=======
+    public void serializeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         if (((CharSequence) data.get(0)) instanceof Utf8) {
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
index b518ccb6b..a0d4833fa 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -14,6 +18,7 @@ public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsF
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -22,6 +27,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<IndexedRecord> recordsArray0 = ((List<IndexedRecord> ) data.get(0));
@@ -34,6 +49,7 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordColl
                 (encoder).startItem();
                 IndexedRecord subRecord0 = null;
                 subRecord0 = ((List<IndexedRecord> ) recordsArray0).get(counter0);
+<<<<<<< HEAD
                 serializeSubRecord0(subRecord0, (encoder));
             }
         }
@@ -44,6 +60,18 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordColl
 
     @SuppressWarnings("unchecked")
     public void serializeSubRecord0(IndexedRecord data, Encoder encoder)
+=======
+                serializeSubRecord0(subRecord0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence subField0 = ((CharSequence) data.get(0));
@@ -61,10 +89,20 @@ public void serializeSubRecord0(IndexedRecord data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder)
         throws IOException
     {
         Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMap0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((recordsMap0 == null)||recordsMap0 .isEmpty()) {
             (encoder).setItemCount(0);
@@ -75,7 +113,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
                 (encoder).writeString(key0);
                 IndexedRecord subRecord1 = null;
                 subRecord1 = ((Map<CharSequence, IndexedRecord> ) recordsMap0).get(key0);
+<<<<<<< HEAD
                 serializeSubRecord0(subRecord1, (encoder));
+=======
+                serializeSubRecord0(subRecord1, (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
         }
         (encoder).writeMapEnd();
@@ -101,7 +143,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
                         } else {
                             if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
                                 (encoder).writeIndex(1);
+<<<<<<< HEAD
                                 serializeSubRecord0(((IndexedRecord) union0), (encoder));
+=======
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                         }
                     }
@@ -112,7 +158,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<CharSequence, IndexedRecord> recordsMapUnion0 = ((Map<CharSequence, IndexedRecord> ) data.get(3));
@@ -122,6 +172,12 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
         } else {
             if (recordsMapUnion0 instanceof Map) {
                 (encoder).writeIndex(1);
+<<<<<<< HEAD
+=======
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 (encoder).writeMapStart();
                 if ((((Map<CharSequence, IndexedRecord> ) recordsMapUnion0) == null)||((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).isEmpty()) {
                     (encoder).setItemCount(0);
@@ -138,7 +194,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
                         } else {
                             if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
                                 (encoder).writeIndex(1);
+<<<<<<< HEAD
                                 serializeSubRecord0(((IndexedRecord) union1), (encoder));
+=======
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                         }
                     }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
index e75b442cd..6c0c14788 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -14,6 +18,7 @@ public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexColle
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -22,6 +27,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<Map<CharSequence, IndexedRecord>> recordsArrayMap0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(0));
@@ -34,6 +49,12 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComp
                 (encoder).startItem();
                 Map<CharSequence, IndexedRecord> map0 = null;
                 map0 = ((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMap0).get(counter0);
+<<<<<<< HEAD
+=======
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(map0);
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 (encoder).writeMapStart();
                 if ((map0 == null)||map0 .isEmpty()) {
                     (encoder).setItemCount(0);
@@ -50,7 +71,11 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComp
                         } else {
                             if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
                                 (encoder).writeIndex(1);
+<<<<<<< HEAD
                                 serializeSubRecord0(((IndexedRecord) union0), (encoder));
+=======
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                         }
                     }
@@ -59,12 +84,21 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComp
             }
         }
         (encoder).writeArrayEnd();
+<<<<<<< HEAD
         serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder));
         serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     public void serializeSubRecord0(IndexedRecord data, Encoder encoder)
+=======
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence subField0 = ((CharSequence) data.get(0));
@@ -82,10 +116,20 @@ public void serializeSubRecord0(IndexedRecord data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder)
         throws IOException
     {
         Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMapArray0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((recordsMapArray0 == null)||recordsMapArray0 .isEmpty()) {
             (encoder).setItemCount(0);
@@ -111,7 +155,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
                         } else {
                             if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
                                 (encoder).writeIndex(1);
+<<<<<<< HEAD
                                 serializeSubRecord0(((IndexedRecord) union1), (encoder));
+=======
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                             }
                         }
                     }
@@ -136,6 +184,12 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
                         (encoder).startItem();
                         Map<CharSequence, IndexedRecord> map1 = null;
                         map1 = ((List<Map<CharSequence, IndexedRecord>> )((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0)).get(counter2);
+<<<<<<< HEAD
+=======
+                        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                            (customization).getCheckMapTypeFunction().apply(map1);
+                        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                         (encoder).writeMapStart();
                         if ((map1 == null)||map1 .isEmpty()) {
                             (encoder).setItemCount(0);
@@ -152,7 +206,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
                                 } else {
                                     if ((union2 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union2).getSchema().getFullName())) {
                                         (encoder).writeIndex(1);
+<<<<<<< HEAD
                                         serializeSubRecord0(((IndexedRecord) union2), (encoder));
+=======
+                                        serializeSubRecord0(((IndexedRecord) union2), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                     }
                                 }
                             }
@@ -166,7 +224,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Map<CharSequence, List<IndexedRecord>> recordsMapArrayUnion0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(3));
@@ -176,6 +238,12 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
         } else {
             if (recordsMapArrayUnion0 instanceof Map) {
                 (encoder).writeIndex(1);
+<<<<<<< HEAD
+=======
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 (encoder).writeMapStart();
                 if ((((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0) == null)||((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).isEmpty()) {
                     (encoder).setItemCount(0);
@@ -201,7 +269,11 @@ private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCo
                                 } else {
                                     if ((union3 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union3).getSchema().getFullName())) {
                                         (encoder).writeIndex(1);
+<<<<<<< HEAD
                                         serializeSubRecord0(((IndexedRecord) union3), (encoder));
+=======
+                                        serializeSubRecord0(((IndexedRecord) union3), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                                     }
                                 }
                             }
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
index f2ec5530a..76f7df6a4 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
@@ -3,6 +3,10 @@
 
 import java.io.IOException;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -12,6 +16,7 @@ public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_Generi
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -20,6 +25,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         IndexedRecord record0 = ((IndexedRecord) data.get(0));
@@ -29,6 +44,7 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordFiel
         } else {
             if ((record0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) record0).getSchema().getFullName())) {
                 (encoder).writeIndex(1);
+<<<<<<< HEAD
                 serializeSubRecord0(((IndexedRecord) record0), (encoder));
             }
         }
@@ -37,6 +53,16 @@ public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordFiel
 
     @SuppressWarnings("unchecked")
     public void serializeSubRecord0(IndexedRecord data, Encoder encoder)
+=======
+                serializeSubRecord0(((IndexedRecord) record0), (encoder), (customization));
+            }
+        }
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence subField0 = ((CharSequence) data.get(0));
@@ -54,11 +80,19 @@ public void serializeSubRecord0(IndexedRecord data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder)
         throws IOException
     {
         IndexedRecord record10 = ((IndexedRecord) data.get(1));
         serializeSubRecord0(record10, (encoder));
+=======
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record10 = ((IndexedRecord) data.get(1));
+        serializeSubRecord0(record10, (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         CharSequence field0 = ((CharSequence) data.get(2));
         if (field0 == null) {
             (encoder).writeIndex(0);
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeEnums_GenericSerializer_957378572.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeEnums_GenericSerializer_957378572.java
index f249b3c5d..a885ec20d 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeEnums_GenericSerializer_957378572.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeEnums_GenericSerializer_957378572.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.GenericEnumSymbol;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
@@ -14,6 +18,7 @@ public class FastSerdeEnums_GenericSerializer_957378572
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -22,6 +27,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         int valueToWrite0;
@@ -32,11 +47,19 @@ public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder)
             valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
         }
         (encoder).writeEnum(valueToWrite0);
+<<<<<<< HEAD
         serialize_FastSerdeEnums0(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder)
+=======
+        serialize_FastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericEnumSymbol> arrayOfEnums0 = ((List<GenericEnumSymbol> ) data.get(1));
@@ -67,6 +90,12 @@ private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder)
             }
         }
         Map<CharSequence, GenericEnumSymbol> mapOfEnums0 = ((Map<CharSequence, GenericEnumSymbol> ) data.get(2));
+<<<<<<< HEAD
+=======
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfEnums0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((mapOfEnums0 == null)||mapOfEnums0 .isEmpty()) {
             (encoder).setItemCount(0);
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeFixed_GenericSerializer_504108934.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeFixed_GenericSerializer_504108934.java
index 23e5625fc..9916ccee2 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeFixed_GenericSerializer_504108934.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeFixed_GenericSerializer_504108934.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.GenericFixed;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
@@ -14,6 +18,7 @@ public class FastSerdeFixed_GenericSerializer_504108934
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -30,6 +35,24 @@ public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<GenericFixed> arrayOfFixed0 = ((List<GenericFixed> ) data.get(1));
@@ -53,6 +76,12 @@ private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder)
             }
         }
         Map<CharSequence, GenericFixed> mapOfFixed0 = ((Map<CharSequence, GenericFixed> ) data.get(2));
+<<<<<<< HEAD
+=======
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfFixed0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((mapOfFixed0 == null)||mapOfFixed0 .isEmpty()) {
             (encoder).setItemCount(0);
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java
index 93551504e..3d5480de0 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java
@@ -6,6 +6,10 @@
 import java.time.LocalDate;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Conversions;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -22,6 +26,7 @@ public class FastSerdeLogicalTypesDefined_GenericSerializer_229156053
     private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
     private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -30,16 +35,34 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastSerdeLogicalTypesDefined0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesDefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue0 = data.get(0);
         convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
         (encoder).writeInt(((Integer) convertedValue0));
+<<<<<<< HEAD
         serialize_FastSerdeLogicalTypesDefined0(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     private void serialize_FastSerdeLogicalTypesDefined0(IndexedRecord data, Encoder encoder)
+=======
+        serialize_FastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesDefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue1 = data.get(1);
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java
index e3bb785c0..a556d9fbb 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java
@@ -6,6 +6,10 @@
 import java.time.LocalDate;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined;
 import org.apache.avro.Conversions;
 import org.apache.avro.Schema;
@@ -22,6 +26,7 @@ public class FastSerdeLogicalTypesDefined_SpecificSerializer_229156053
     private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
     private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
 
+<<<<<<< HEAD
     public void serialize(FastSerdeLogicalTypesDefined data, Encoder encoder)
         throws IOException
     {
@@ -30,16 +35,34 @@ public void serialize(FastSerdeLogicalTypesDefined data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastSerdeLogicalTypesDefined0(FastSerdeLogicalTypesDefined data, Encoder encoder)
+=======
+    public void serialize(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesDefined0(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue0 = data.get(0);
         convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
         (encoder).writeInt(((Integer) convertedValue0));
+<<<<<<< HEAD
         serialize_FastSerdeLogicalTypesDefined0(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     private void serialize_FastSerdeLogicalTypesDefined0(FastSerdeLogicalTypesDefined data, Encoder encoder)
+=======
+        serialize_FastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesDefined0(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue1 = data.get(1);
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java
index c0c98c372..d91f3cb40 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java
@@ -12,6 +12,10 @@
 import java.util.Map;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.Conversions;
 import org.apache.avro.Schema;
 import org.apache.avro.generic.IndexedRecord;
@@ -39,6 +43,7 @@ public class FastSerdeLogicalTypesTest1_GenericSerializer_1007574890
     private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
     private final Schema logicalTypeSchema__250645780 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"local-timestamp-millis\"}");
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -47,6 +52,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastSerdeLogicalTypesTest10(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesTest10(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesTest10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object unionOfArrayAndMap0 = ((Object) data.get(0));
@@ -79,6 +94,12 @@ public void serializeFastSerdeLogicalTypesTest10(IndexedRecord data, Encoder enc
         } else {
             if (unionOfArrayAndMap0 instanceof Map) {
                 (encoder).writeIndex(1);
+<<<<<<< HEAD
+=======
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 (encoder).writeMapStart();
                 if ((((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0) == null)||((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).isEmpty()) {
                     (encoder).setItemCount(0);
@@ -95,6 +116,7 @@ public void serializeFastSerdeLogicalTypesTest10(IndexedRecord data, Encoder enc
                 (encoder).writeMapEnd();
             }
         }
+<<<<<<< HEAD
         serialize_FastSerdeLogicalTypesTest10(data, (encoder));
         serialize_FastSerdeLogicalTypesTest11(data, (encoder));
         serialize_FastSerdeLogicalTypesTest12(data, (encoder));
@@ -108,6 +130,24 @@ private void serialize_FastSerdeLogicalTypesTest10(IndexedRecord data, Encoder e
         throws IOException
     {
         Map<CharSequence, Object> mapOfUnionsOfDateAndTimestampMillis0 = ((Map<CharSequence, Object> ) data.get(1));
+=======
+        serialize_FastSerdeLogicalTypesTest10(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest11(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest12(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest13(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest14(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest15(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, Object> mapOfUnionsOfDateAndTimestampMillis0 = ((Map<CharSequence, Object> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfUnionsOfDateAndTimestampMillis0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((mapOfUnionsOfDateAndTimestampMillis0 == null)||mapOfUnionsOfDateAndTimestampMillis0 .isEmpty()) {
             (encoder).setItemCount(0);
@@ -135,6 +175,12 @@ private void serialize_FastSerdeLogicalTypesTest10(IndexedRecord data, Encoder e
         }
         (encoder).writeMapEnd();
         Map<CharSequence, Instant> timestampMillisMap0 = ((Map<CharSequence, Instant> ) data.get(2));
+<<<<<<< HEAD
+=======
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(timestampMillisMap0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((timestampMillisMap0 == null)||timestampMillisMap0 .isEmpty()) {
             (encoder).setItemCount(0);
@@ -152,7 +198,11 @@ private void serialize_FastSerdeLogicalTypesTest10(IndexedRecord data, Encoder e
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest11(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<LocalDate> nullableArrayOfDates0 = ((List<LocalDate> ) data.get(3));
@@ -216,7 +266,11 @@ private void serialize_FastSerdeLogicalTypesTest11(IndexedRecord data, Encoder e
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest12(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object unionOfDecimalOrDate0 = ((Object) data.get(5));
@@ -243,7 +297,11 @@ private void serialize_FastSerdeLogicalTypesTest12(IndexedRecord data, Encoder e
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest13(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue13 = data.get(7);
@@ -255,7 +313,11 @@ private void serialize_FastSerdeLogicalTypesTest13(IndexedRecord data, Encoder e
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest14(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue15 = data.get(9);
@@ -267,29 +329,50 @@ private void serialize_FastSerdeLogicalTypesTest14(IndexedRecord data, Encoder e
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest15(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue17 = data.get(11);
         convertedValue17 = Conversions.convertToRawType(convertedValue17, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
         (encoder).writeInt(((Integer) convertedValue17));
         IndexedRecord nestedLocalTimestampMillis0 = ((IndexedRecord) data.get(12));
+<<<<<<< HEAD
         serializeLocalTimestampRecord0(nestedLocalTimestampMillis0, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     public void serializeLocalTimestampRecord0(IndexedRecord data, Encoder encoder)
+=======
+        serializeLocalTimestampRecord0(nestedLocalTimestampMillis0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeLocalTimestampRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue18 = data.get(0);
         convertedValue18 = Conversions.convertToRawType(convertedValue18, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
         (encoder).writeLong(((Long) convertedValue18));
+<<<<<<< HEAD
         serialize_LocalTimestampRecord0(data, (encoder));
         serialize_LocalTimestampRecord1(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     private void serialize_LocalTimestampRecord0(IndexedRecord data, Encoder encoder)
+=======
+        serialize_LocalTimestampRecord0(data, (encoder), (customization));
+        serialize_LocalTimestampRecord1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         LocalDateTime nullableNestedTimestamp0 = ((LocalDateTime) data.get(1));
@@ -324,7 +407,11 @@ private void serialize_LocalTimestampRecord0(IndexedRecord data, Encoder encoder
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_LocalTimestampRecord1(IndexedRecord data, Encoder encoder)
+=======
+    private void serialize_LocalTimestampRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object unionOfDateAndLocalTimestamp0 = ((Object) data.get(3));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java
index 3b701c99a..0436a4477 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java
@@ -12,6 +12,10 @@
 import java.util.Map;
 import com.linkedin.avro.api.PrimitiveIntList;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1;
 import com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord;
 import org.apache.avro.Conversions;
@@ -40,6 +44,7 @@ public class FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890
     private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
     private final Schema logicalTypeSchema__250645780 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"local-timestamp-millis\"}");
 
+<<<<<<< HEAD
     public void serialize(FastSerdeLogicalTypesTest1 data, Encoder encoder)
         throws IOException
     {
@@ -48,6 +53,16 @@ public void serialize(FastSerdeLogicalTypesTest1 data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data, Encoder encoder)
+=======
+    public void serialize(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesTest10(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object unionOfArrayAndMap0 = ((Object) data.get(0));
@@ -80,6 +95,12 @@ public void serializeFastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data
         } else {
             if (unionOfArrayAndMap0 instanceof Map) {
                 (encoder).writeIndex(1);
+<<<<<<< HEAD
+=======
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0));
+                }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                 (encoder).writeMapStart();
                 if ((((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0) == null)||((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).isEmpty()) {
                     (encoder).setItemCount(0);
@@ -96,6 +117,7 @@ public void serializeFastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data
                 (encoder).writeMapEnd();
             }
         }
+<<<<<<< HEAD
         serialize_FastSerdeLogicalTypesTest10(data, (encoder));
         serialize_FastSerdeLogicalTypesTest11(data, (encoder));
         serialize_FastSerdeLogicalTypesTest12(data, (encoder));
@@ -109,6 +131,24 @@ private void serialize_FastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 da
         throws IOException
     {
         Map<CharSequence, Object> mapOfUnionsOfDateAndTimestampMillis0 = ((Map<CharSequence, Object> ) data.get(1));
+=======
+        serialize_FastSerdeLogicalTypesTest10(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest11(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest12(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest13(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest14(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest15(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, Object> mapOfUnionsOfDateAndTimestampMillis0 = ((Map<CharSequence, Object> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfUnionsOfDateAndTimestampMillis0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((mapOfUnionsOfDateAndTimestampMillis0 == null)||mapOfUnionsOfDateAndTimestampMillis0 .isEmpty()) {
             (encoder).setItemCount(0);
@@ -136,6 +176,12 @@ private void serialize_FastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 da
         }
         (encoder).writeMapEnd();
         Map<CharSequence, Instant> timestampMillisMap0 = ((Map<CharSequence, Instant> ) data.get(2));
+<<<<<<< HEAD
+=======
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(timestampMillisMap0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((timestampMillisMap0 == null)||timestampMillisMap0 .isEmpty()) {
             (encoder).setItemCount(0);
@@ -153,7 +199,11 @@ private void serialize_FastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 da
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest11(FastSerdeLogicalTypesTest1 data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest11(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<LocalDate> nullableArrayOfDates0 = ((List<LocalDate> ) data.get(3));
@@ -217,7 +267,11 @@ private void serialize_FastSerdeLogicalTypesTest11(FastSerdeLogicalTypesTest1 da
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest12(FastSerdeLogicalTypesTest1 data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest12(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object unionOfDecimalOrDate0 = ((Object) data.get(5));
@@ -244,7 +298,11 @@ private void serialize_FastSerdeLogicalTypesTest12(FastSerdeLogicalTypesTest1 da
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest13(FastSerdeLogicalTypesTest1 data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest13(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue13 = data.get(7);
@@ -256,7 +314,11 @@ private void serialize_FastSerdeLogicalTypesTest13(FastSerdeLogicalTypesTest1 da
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest14(FastSerdeLogicalTypesTest1 data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest14(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue15 = data.get(9);
@@ -268,29 +330,50 @@ private void serialize_FastSerdeLogicalTypesTest14(FastSerdeLogicalTypesTest1 da
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastSerdeLogicalTypesTest15(FastSerdeLogicalTypesTest1 data, Encoder encoder)
+=======
+    private void serialize_FastSerdeLogicalTypesTest15(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue17 = data.get(11);
         convertedValue17 = Conversions.convertToRawType(convertedValue17, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
         (encoder).writeInt(((Integer) convertedValue17));
         LocalTimestampRecord nestedLocalTimestampMillis0 = ((LocalTimestampRecord) data.get(12));
+<<<<<<< HEAD
         serializeLocalTimestampRecord0(nestedLocalTimestampMillis0, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     public void serializeLocalTimestampRecord0(LocalTimestampRecord data, Encoder encoder)
+=======
+        serializeLocalTimestampRecord0(nestedLocalTimestampMillis0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeLocalTimestampRecord0(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object convertedValue18 = data.get(0);
         convertedValue18 = Conversions.convertToRawType(convertedValue18, this.logicalTypeSchema__250645780, this.logicalTypeSchema__250645780 .getLogicalType(), this.conversion_local_timestamp_millis);
         (encoder).writeLong(((Long) convertedValue18));
+<<<<<<< HEAD
         serialize_LocalTimestampRecord0(data, (encoder));
         serialize_LocalTimestampRecord1(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     private void serialize_LocalTimestampRecord0(LocalTimestampRecord data, Encoder encoder)
+=======
+        serialize_LocalTimestampRecord0(data, (encoder), (customization));
+        serialize_LocalTimestampRecord1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord0(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         LocalDateTime nullableNestedTimestamp0 = ((LocalDateTime) data.get(1));
@@ -325,7 +408,11 @@ private void serialize_LocalTimestampRecord0(LocalTimestampRecord data, Encoder
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_LocalTimestampRecord1(LocalTimestampRecord data, Encoder encoder)
+=======
+    private void serialize_LocalTimestampRecord1(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object unionOfDateAndLocalTimestamp0 = ((Object) data.get(3));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java
index e78fac629..2e909c8dc 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 
@@ -12,6 +16,7 @@ public class FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -28,6 +33,24 @@ public void serializeFastSerdeLogicalTypesUndefined0(IndexedRecord data, Encoder
 
     @SuppressWarnings("unchecked")
     private void serialize_FastSerdeLogicalTypesUndefined0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesUndefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesUndefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(1)));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java
index e4a31721e..1507515cf 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.List;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined;
 import org.apache.avro.io.Encoder;
 
@@ -12,6 +16,7 @@ public class FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418
 {
 
 
+<<<<<<< HEAD
     public void serialize(FastSerdeLogicalTypesUndefined data, Encoder encoder)
         throws IOException
     {
@@ -28,6 +33,24 @@ public void serializeFastSerdeLogicalTypesUndefined0(FastSerdeLogicalTypesUndefi
 
     @SuppressWarnings("unchecked")
     private void serialize_FastSerdeLogicalTypesUndefined0(FastSerdeLogicalTypesUndefined data, Encoder encoder)
+=======
+    public void serialize(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesUndefined0(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesUndefined0(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeInt(((Integer) data.get(1)));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
index ec3e8bbaa..b33ce74ed 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -14,6 +18,7 @@ public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSeri
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -22,6 +27,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         if (((CharSequence) data.get(0)) instanceof Utf8) {
@@ -29,12 +44,21 @@ public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(In
         } else {
             (encoder).writeString(((CharSequence) data.get(0)).toString());
         }
+<<<<<<< HEAD
         serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder));
         serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder)
+=======
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence testUnionString0 = ((CharSequence) data.get(1));
@@ -68,10 +92,20 @@ private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder)
         throws IOException
     {
         Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+=======
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
             (encoder).setItemCount(0);
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
index 475045cf9..efe8b543a 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
@@ -5,6 +5,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -14,6 +18,7 @@ public class FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -22,6 +27,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         if (((CharSequence) data.get(0)) instanceof Utf8) {
@@ -29,12 +44,21 @@ public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord da
         } else {
             (encoder).writeString(((CharSequence) data.get(0)).toString());
         }
+<<<<<<< HEAD
         serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder));
         serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder));
     }
 
     @SuppressWarnings("unchecked")
     private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder)
+=======
+        serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence testUnionString0 = ((CharSequence) data.get(1));
@@ -68,10 +92,20 @@ private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder)
         throws IOException
     {
         Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+=======
+    private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
             (encoder).setItemCount(0);
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Map_of_UNION_GenericSerializer_2140000109.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Map_of_UNION_GenericSerializer_2140000109.java
index 9aeca0f8a..6aa3df15e 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Map_of_UNION_GenericSerializer_2140000109.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Map_of_UNION_GenericSerializer_2140000109.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -13,9 +17,18 @@ public class Map_of_UNION_GenericSerializer_2140000109
 {
 
 
+<<<<<<< HEAD
     public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder)
         throws IOException
     {
+=======
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((data == null)||data.isEmpty()) {
             (encoder).setItemCount(0);
@@ -32,7 +45,11 @@ public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder)
                 } else {
                     if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
                         (encoder).writeIndex(1);
+<<<<<<< HEAD
                         serializeRecord0(((IndexedRecord) union0), (encoder));
+=======
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
                     }
                 }
             }
@@ -41,7 +58,11 @@ public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     public void serializeRecord0(IndexedRecord data, Encoder encoder)
+=======
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence field0 = ((CharSequence) data.get(0));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Map_of_record_GenericSerializer_1677529043.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Map_of_record_GenericSerializer_1677529043.java
index 6b4925efc..23c59e517 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Map_of_record_GenericSerializer_1677529043.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/Map_of_record_GenericSerializer_1677529043.java
@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 import org.apache.avro.util.Utf8;
@@ -13,9 +17,18 @@ public class Map_of_record_GenericSerializer_1677529043
 {
 
 
+<<<<<<< HEAD
     public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder)
         throws IOException
     {
+=======
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((data == null)||data.isEmpty()) {
             (encoder).setItemCount(0);
@@ -26,14 +39,22 @@ public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder)
                 (encoder).writeString(key0);
                 IndexedRecord record0 = null;
                 record0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+<<<<<<< HEAD
                 serializeRecord0(record0, (encoder));
+=======
+                serializeRecord0(record0, (encoder), (customization));
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
             }
         }
         (encoder).writeMapEnd();
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     public void serializeRecord0(IndexedRecord data, Encoder encoder)
+=======
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         CharSequence field0 = ((CharSequence) data.get(0));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/StringableRecord_SpecificSerializer_842267318.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/StringableRecord_SpecificSerializer_842267318.java
index af5c14728..240a87204 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/StringableRecord_SpecificSerializer_842267318.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/StringableRecord_SpecificSerializer_842267318.java
@@ -10,6 +10,10 @@
 import java.util.List;
 import java.util.Map;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord;
 import com.linkedin.avro.fastserde.generated.avro.StringableRecord;
 import com.linkedin.avro.fastserde.generated.avro.StringableSubRecord;
@@ -21,6 +25,7 @@ public class StringableRecord_SpecificSerializer_842267318
 {
 
 
+<<<<<<< HEAD
     public void serialize(StringableRecord data, Encoder encoder)
         throws IOException
     {
@@ -41,6 +46,28 @@ public void serializeStringableRecord0(StringableRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     private void serialize_StringableRecord0(StringableRecord data, Encoder encoder)
+=======
+    public void serialize(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeStringableRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigInteger) data.get(0)).toString());
+        serialize_StringableRecord0(data, (encoder), (customization));
+        serialize_StringableRecord1(data, (encoder), (customization));
+        serialize_StringableRecord2(data, (encoder), (customization));
+        serialize_StringableRecord3(data, (encoder), (customization));
+        serialize_StringableRecord4(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeString(((BigDecimal) data.get(1)).toString());
@@ -48,7 +75,11 @@ private void serialize_StringableRecord0(StringableRecord data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_StringableRecord1(StringableRecord data, Encoder encoder)
+=======
+    private void serialize_StringableRecord1(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         (encoder).writeString(((URL) data.get(3)).toString());
@@ -56,7 +87,11 @@ private void serialize_StringableRecord1(StringableRecord data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_StringableRecord2(StringableRecord data, Encoder encoder)
+=======
+    private void serialize_StringableRecord2(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<URL> urlArray0 = ((List<URL> ) data.get(5));
@@ -72,6 +107,12 @@ private void serialize_StringableRecord2(StringableRecord data, Encoder encoder)
         }
         (encoder).writeArrayEnd();
         Map<URL, BigInteger> urlMap0 = ((Map<URL, BigInteger> ) data.get(6));
+<<<<<<< HEAD
+=======
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(urlMap0);
+        }
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         (encoder).writeMapStart();
         if ((urlMap0 == null)||urlMap0 .isEmpty()) {
             (encoder).setItemCount(0);
@@ -88,6 +129,7 @@ private void serialize_StringableRecord2(StringableRecord data, Encoder encoder)
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     private void serialize_StringableRecord3(StringableRecord data, Encoder encoder)
         throws IOException
     {
@@ -107,6 +149,27 @@ public void serializeStringableSubRecord0(StringableSubRecord data, Encoder enco
 
     @SuppressWarnings("unchecked")
     private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder)
+=======
+    private void serialize_StringableRecord3(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord0 = ((StringableSubRecord) data.get(7));
+        serializeStringableSubRecord0(subRecord0, (encoder), (customization));
+        AnotherSubRecord subRecordWithSubRecord0 = ((AnotherSubRecord) data.get(8));
+        serializeAnotherSubRecord0(subRecordWithSubRecord0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URI) data.get(0)).toString());
+        serialize_StringableSubRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         Object nullStringIntUnion0 = ((Object) data.get(1));
@@ -131,6 +194,7 @@ private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder en
     }
 
     @SuppressWarnings("unchecked")
+<<<<<<< HEAD
     public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder)
         throws IOException
     {
@@ -140,6 +204,17 @@ public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     private void serialize_StringableRecord4(StringableRecord data, Encoder encoder)
+=======
+    public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord1 = ((StringableSubRecord) data.get(0));
+        serializeStringableSubRecord0(subRecord1, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord4(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         String stringUnion0 = ((String) data.get(9));
diff --git a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/TestArrayOfFloats_GenericSerializer_1408566797.java b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/TestArrayOfFloats_GenericSerializer_1408566797.java
index 90b8bcd9d..dc4e065d1 100644
--- a/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/TestArrayOfFloats_GenericSerializer_1408566797.java
+++ b/fastserde/avro-fastserde-tests111/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_11/TestArrayOfFloats_GenericSerializer_1408566797.java
@@ -6,6 +6,10 @@
 import com.linkedin.avro.api.PrimitiveFloatList;
 import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
 import com.linkedin.avro.fastserde.FastSerializer;
+<<<<<<< HEAD
+=======
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.avro.io.Encoder;
 
@@ -14,6 +18,7 @@ public class TestArrayOfFloats_GenericSerializer_1408566797
 {
 
 
+<<<<<<< HEAD
     public void serialize(IndexedRecord data, Encoder encoder)
         throws IOException
     {
@@ -22,6 +27,16 @@ public void serialize(IndexedRecord data, Encoder encoder)
 
     @SuppressWarnings("unchecked")
     public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder)
+=======
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeTestArrayOfFloats0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+>>>>>>> 6f03f254 (Added generated test classes temporarily)
         throws IOException
     {
         List<Float> array_of_float0 = ((List<Float> ) data.get(0));
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
new file mode 100644
index 000000000..2051ec56a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_BOOLEAN_GenericDeserializer_869749973_869749973
+    implements FastDeserializer<List<Boolean>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_BOOLEAN_GenericDeserializer_869749973_869749973(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveBooleanList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveBooleanList) {
+            array0 = ((PrimitiveBooleanList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveBooleanArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
new file mode 100644
index 000000000..e3e5d5dc9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_DOUBLE_GenericDeserializer_18760307_18760307
+    implements FastDeserializer<List<Double>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_DOUBLE_GenericDeserializer_18760307_18760307(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Double> deserialize(List<Double> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveDoubleList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveDoubleList) {
+            array0 = ((PrimitiveDoubleList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveDoubleArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
new file mode 100644
index 000000000..f37bdd1a1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
@@ -0,0 +1,31 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_FLOAT_GenericDeserializer_1012670397_1012670397
+    implements FastDeserializer<List<Float>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_FLOAT_GenericDeserializer_1012670397_1012670397(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Float> deserialize(List<Float> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveFloatList array0 = null;
+        array0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray((reuse), (decoder)));
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_INT_GenericDeserializer_1012089072_1012089072.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
new file mode 100644
index 000000000..6a3c60063
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_INT_GenericDeserializer_1012089072_1012089072
+    implements FastDeserializer<List<Integer>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_INT_GenericDeserializer_1012089072_1012089072(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Integer> deserialize(List<Integer> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveIntList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveIntList) {
+            array0 = ((PrimitiveIntList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_LONG_GenericDeserializer_325099267_325099267.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_LONG_GenericDeserializer_325099267_325099267.java
new file mode 100644
index 000000000..d8945bb4e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_LONG_GenericDeserializer_325099267_325099267.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_LONG_GenericDeserializer_325099267_325099267
+    implements FastDeserializer<List<Long>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_LONG_GenericDeserializer_325099267_325099267(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Long> deserialize(List<Long> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveLongList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveLongList) {
+            array0 = ((PrimitiveLongList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveLongArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_TestRecord_SpecificDeserializer_1347912411_1347912411.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_TestRecord_SpecificDeserializer_1347912411_1347912411.java
new file mode 100644
index 000000000..e89dc42b9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_TestRecord_SpecificDeserializer_1347912411_1347912411.java
@@ -0,0 +1,1058 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_TestRecord_SpecificDeserializer_1347912411_1347912411
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_TestRecord_SpecificDeserializer_1347912411_1347912411(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_UNION_GenericDeserializer_777827233_777827233.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_UNION_GenericDeserializer_777827233_777827233.java
new file mode 100644
index 000000000..7ddf4f08e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_UNION_GenericDeserializer_777827233_777827233.java
@@ -0,0 +1,94 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericDeserializer_777827233_777827233
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema arrayElemOptionSchema0;
+    private final Schema field0;
+
+    public Array_of_UNION_GenericDeserializer_777827233_777827233(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.arrayElemOptionSchema0 = arrayArrayElemSchema0 .getTypes().get(1);
+        this.field0 = arrayElemOptionSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayElemOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayElemOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_UNION_SpecificDeserializer_1813090821_1813090821.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_UNION_SpecificDeserializer_1813090821_1813090821.java
new file mode 100644
index 000000000..883305c53
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_UNION_SpecificDeserializer_1813090821_1813090821.java
@@ -0,0 +1,1068 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_SpecificDeserializer_1813090821_1813090821
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_UNION_SpecificDeserializer_1813090821_1813090821(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_record_GenericDeserializer_1606337179_2018567528.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_record_GenericDeserializer_1606337179_2018567528.java
new file mode 100644
index 000000000..4458b7fa8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_record_GenericDeserializer_1606337179_2018567528.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_record_GenericDeserializer_1606337179_2018567528
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionArrayElemSchema0;
+
+    public Array_of_record_GenericDeserializer_1606337179_2018567528(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionArrayElemSchema0 = readerSchema.getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                List<IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                if ((reuse) instanceof List) {
+                    unionOption0 = ((List)(reuse));
+                    unionOption0 .clear();
+                } else {
+                    unionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object unionOptionArrayElementReuseVar0 = null;
+                        if ((reuse) instanceof GenericArray) {
+                            unionOptionArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                        }
+                        unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder), (customization)));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_record_GenericDeserializer_477614132_477614132.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_record_GenericDeserializer_477614132_477614132.java
new file mode 100644
index 000000000..2ca2ff5ad
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Array_of_record_GenericDeserializer_477614132_477614132.java
@@ -0,0 +1,82 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericDeserializer_477614132_477614132
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema field0;
+
+    public Array_of_record_GenericDeserializer_477614132_477614132(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.field0 = arrayArrayElemSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
new file mode 100644
index 000000000..974e5d379
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
@@ -0,0 +1,23040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema f00;
+    private final Schema f10;
+    private final Schema f20;
+    private final Schema f30;
+    private final Schema f40;
+    private final Schema f50;
+    private final Schema f60;
+    private final Schema f70;
+    private final Schema f80;
+    private final Schema f90;
+    private final Schema f100;
+    private final Schema f110;
+    private final Schema f120;
+    private final Schema f130;
+    private final Schema f140;
+    private final Schema f150;
+    private final Schema f160;
+    private final Schema f170;
+    private final Schema f180;
+    private final Schema f190;
+    private final Schema f200;
+    private final Schema f210;
+    private final Schema f220;
+    private final Schema f230;
+    private final Schema f240;
+    private final Schema f250;
+    private final Schema f260;
+    private final Schema f270;
+    private final Schema f280;
+    private final Schema f290;
+    private final Schema f300;
+    private final Schema f310;
+    private final Schema f320;
+    private final Schema f330;
+    private final Schema f340;
+    private final Schema f350;
+    private final Schema f360;
+    private final Schema f370;
+    private final Schema f380;
+    private final Schema f390;
+    private final Schema f400;
+    private final Schema f410;
+    private final Schema f420;
+    private final Schema f430;
+    private final Schema f440;
+    private final Schema f450;
+    private final Schema f460;
+    private final Schema f470;
+    private final Schema f480;
+    private final Schema f490;
+    private final Schema f500;
+    private final Schema f510;
+    private final Schema f520;
+    private final Schema f530;
+    private final Schema f540;
+    private final Schema f550;
+    private final Schema f560;
+    private final Schema f570;
+    private final Schema f580;
+    private final Schema f590;
+    private final Schema f600;
+    private final Schema f610;
+    private final Schema f620;
+    private final Schema f630;
+    private final Schema f640;
+    private final Schema f650;
+    private final Schema f660;
+    private final Schema f670;
+    private final Schema f680;
+    private final Schema f690;
+    private final Schema f700;
+    private final Schema f710;
+    private final Schema f720;
+    private final Schema f730;
+    private final Schema f740;
+    private final Schema f750;
+    private final Schema f760;
+    private final Schema f770;
+    private final Schema f780;
+    private final Schema f790;
+    private final Schema f800;
+    private final Schema f810;
+    private final Schema f820;
+    private final Schema f830;
+    private final Schema f840;
+    private final Schema f850;
+    private final Schema f860;
+    private final Schema f870;
+    private final Schema f880;
+    private final Schema f890;
+    private final Schema f900;
+    private final Schema f910;
+    private final Schema f920;
+    private final Schema f930;
+    private final Schema f940;
+    private final Schema f950;
+    private final Schema f960;
+    private final Schema f970;
+    private final Schema f980;
+    private final Schema f990;
+    private final Schema f1000;
+    private final Schema f1010;
+    private final Schema f1020;
+    private final Schema f1030;
+    private final Schema f1040;
+    private final Schema f1050;
+    private final Schema f1060;
+    private final Schema f1070;
+    private final Schema f1080;
+    private final Schema f1090;
+    private final Schema f1100;
+    private final Schema f1110;
+    private final Schema f1120;
+    private final Schema f1130;
+    private final Schema f1140;
+    private final Schema f1150;
+    private final Schema f1160;
+    private final Schema f1170;
+    private final Schema f1180;
+    private final Schema f1190;
+    private final Schema f1200;
+    private final Schema f1210;
+    private final Schema f1220;
+    private final Schema f1230;
+    private final Schema f1240;
+    private final Schema f1250;
+    private final Schema f1260;
+    private final Schema f1270;
+    private final Schema f1280;
+    private final Schema f1290;
+    private final Schema f1300;
+    private final Schema f1310;
+    private final Schema f1320;
+    private final Schema f1330;
+    private final Schema f1340;
+    private final Schema f1350;
+    private final Schema f1360;
+    private final Schema f1370;
+    private final Schema f1380;
+    private final Schema f1390;
+    private final Schema f1400;
+    private final Schema f1410;
+    private final Schema f1420;
+    private final Schema f1430;
+    private final Schema f1440;
+    private final Schema f1450;
+    private final Schema f1460;
+    private final Schema f1470;
+    private final Schema f1480;
+    private final Schema f1490;
+    private final Schema f1500;
+    private final Schema f1510;
+    private final Schema f1520;
+    private final Schema f1530;
+    private final Schema f1540;
+    private final Schema f1550;
+    private final Schema f1560;
+    private final Schema f1570;
+    private final Schema f1580;
+    private final Schema f1590;
+    private final Schema f1600;
+    private final Schema f1610;
+    private final Schema f1620;
+    private final Schema f1630;
+    private final Schema f1640;
+    private final Schema f1650;
+    private final Schema f1660;
+    private final Schema f1670;
+    private final Schema f1680;
+    private final Schema f1690;
+    private final Schema f1700;
+    private final Schema f1710;
+    private final Schema f1720;
+    private final Schema f1730;
+    private final Schema f1740;
+    private final Schema f1750;
+    private final Schema f1760;
+    private final Schema f1770;
+    private final Schema f1780;
+    private final Schema f1790;
+    private final Schema f1800;
+    private final Schema f1810;
+    private final Schema f1820;
+    private final Schema f1830;
+    private final Schema f1840;
+    private final Schema f1850;
+    private final Schema f1860;
+    private final Schema f1870;
+    private final Schema f1880;
+    private final Schema f1890;
+    private final Schema f1900;
+    private final Schema f1910;
+    private final Schema f1920;
+    private final Schema f1930;
+    private final Schema f1940;
+    private final Schema f1950;
+    private final Schema f1960;
+    private final Schema f1970;
+    private final Schema f1980;
+    private final Schema f1990;
+    private final Schema f2000;
+    private final Schema f2010;
+    private final Schema f2020;
+    private final Schema f2030;
+    private final Schema f2040;
+    private final Schema f2050;
+    private final Schema f2060;
+    private final Schema f2070;
+    private final Schema f2080;
+    private final Schema f2090;
+    private final Schema f2100;
+    private final Schema f2110;
+    private final Schema f2120;
+    private final Schema f2130;
+    private final Schema f2140;
+    private final Schema f2150;
+    private final Schema f2160;
+    private final Schema f2170;
+    private final Schema f2180;
+    private final Schema f2190;
+    private final Schema f2200;
+    private final Schema f2210;
+    private final Schema f2220;
+    private final Schema f2230;
+    private final Schema f2240;
+    private final Schema f2250;
+    private final Schema f2260;
+    private final Schema f2270;
+    private final Schema f2280;
+    private final Schema f2290;
+    private final Schema f2300;
+    private final Schema f2310;
+    private final Schema f2320;
+    private final Schema f2330;
+    private final Schema f2340;
+    private final Schema f2350;
+    private final Schema f2360;
+    private final Schema f2370;
+    private final Schema f2380;
+    private final Schema f2390;
+    private final Schema f2400;
+    private final Schema f2410;
+    private final Schema f2420;
+    private final Schema f2430;
+    private final Schema f2440;
+    private final Schema f2450;
+    private final Schema f2460;
+    private final Schema f2470;
+    private final Schema f2480;
+    private final Schema f2490;
+    private final Schema f2500;
+    private final Schema f2510;
+    private final Schema f2520;
+    private final Schema f2530;
+    private final Schema f2540;
+    private final Schema f2550;
+    private final Schema f2560;
+    private final Schema f2570;
+    private final Schema f2580;
+    private final Schema f2590;
+    private final Schema f2600;
+    private final Schema f2610;
+    private final Schema f2620;
+    private final Schema f2630;
+    private final Schema f2640;
+    private final Schema f2650;
+    private final Schema f2660;
+    private final Schema f2670;
+    private final Schema f2680;
+    private final Schema f2690;
+    private final Schema f2700;
+    private final Schema f2710;
+    private final Schema f2720;
+    private final Schema f2730;
+    private final Schema f2740;
+    private final Schema f2750;
+    private final Schema f2760;
+    private final Schema f2770;
+    private final Schema f2780;
+    private final Schema f2790;
+    private final Schema f2800;
+    private final Schema f2810;
+    private final Schema f2820;
+    private final Schema f2830;
+    private final Schema f2840;
+    private final Schema f2850;
+    private final Schema f2860;
+    private final Schema f2870;
+    private final Schema f2880;
+    private final Schema f2890;
+    private final Schema f2900;
+    private final Schema f2910;
+    private final Schema f2920;
+    private final Schema f2930;
+    private final Schema f2940;
+    private final Schema f2950;
+    private final Schema f2960;
+    private final Schema f2970;
+    private final Schema f2980;
+    private final Schema f2990;
+    private final Schema f3000;
+    private final Schema f3010;
+    private final Schema f3020;
+    private final Schema f3030;
+    private final Schema f3040;
+    private final Schema f3050;
+    private final Schema f3060;
+    private final Schema f3070;
+    private final Schema f3080;
+    private final Schema f3090;
+    private final Schema f3100;
+    private final Schema f3110;
+    private final Schema f3120;
+    private final Schema f3130;
+    private final Schema f3140;
+    private final Schema f3150;
+    private final Schema f3160;
+    private final Schema f3170;
+    private final Schema f3180;
+    private final Schema f3190;
+    private final Schema f3200;
+    private final Schema f3210;
+    private final Schema f3220;
+    private final Schema f3230;
+    private final Schema f3240;
+    private final Schema f3250;
+    private final Schema f3260;
+    private final Schema f3270;
+    private final Schema f3280;
+    private final Schema f3290;
+    private final Schema f3300;
+    private final Schema f3310;
+    private final Schema f3320;
+    private final Schema f3330;
+    private final Schema f3340;
+    private final Schema f3350;
+    private final Schema f3360;
+    private final Schema f3370;
+    private final Schema f3380;
+    private final Schema f3390;
+    private final Schema f3400;
+    private final Schema f3410;
+    private final Schema f3420;
+    private final Schema f3430;
+    private final Schema f3440;
+    private final Schema f3450;
+    private final Schema f3460;
+    private final Schema f3470;
+    private final Schema f3480;
+    private final Schema f3490;
+    private final Schema f3500;
+    private final Schema f3510;
+    private final Schema f3520;
+    private final Schema f3530;
+    private final Schema f3540;
+    private final Schema f3550;
+    private final Schema f3560;
+    private final Schema f3570;
+    private final Schema f3580;
+    private final Schema f3590;
+    private final Schema f3600;
+    private final Schema f3610;
+    private final Schema f3620;
+    private final Schema f3630;
+    private final Schema f3640;
+    private final Schema f3650;
+    private final Schema f3660;
+    private final Schema f3670;
+    private final Schema f3680;
+    private final Schema f3690;
+    private final Schema f3700;
+    private final Schema f3710;
+    private final Schema f3720;
+    private final Schema f3730;
+    private final Schema f3740;
+    private final Schema f3750;
+    private final Schema f3760;
+    private final Schema f3770;
+    private final Schema f3780;
+    private final Schema f3790;
+    private final Schema f3800;
+    private final Schema f3810;
+    private final Schema f3820;
+    private final Schema f3830;
+    private final Schema f3840;
+    private final Schema f3850;
+    private final Schema f3860;
+    private final Schema f3870;
+    private final Schema f3880;
+    private final Schema f3890;
+    private final Schema f3900;
+    private final Schema f3910;
+    private final Schema f3920;
+    private final Schema f3930;
+    private final Schema f3940;
+    private final Schema f3950;
+    private final Schema f3960;
+    private final Schema f3970;
+    private final Schema f3980;
+    private final Schema f3990;
+    private final Schema f4000;
+    private final Schema f4010;
+    private final Schema f4020;
+    private final Schema f4030;
+    private final Schema f4040;
+    private final Schema f4050;
+    private final Schema f4060;
+    private final Schema f4070;
+    private final Schema f4080;
+    private final Schema f4090;
+    private final Schema f4100;
+    private final Schema f4110;
+    private final Schema f4120;
+    private final Schema f4130;
+    private final Schema f4140;
+    private final Schema f4150;
+    private final Schema f4160;
+    private final Schema f4170;
+    private final Schema f4180;
+    private final Schema f4190;
+    private final Schema f4200;
+    private final Schema f4210;
+    private final Schema f4220;
+    private final Schema f4230;
+    private final Schema f4240;
+    private final Schema f4250;
+    private final Schema f4260;
+    private final Schema f4270;
+    private final Schema f4280;
+    private final Schema f4290;
+    private final Schema f4300;
+    private final Schema f4310;
+    private final Schema f4320;
+    private final Schema f4330;
+    private final Schema f4340;
+    private final Schema f4350;
+    private final Schema f4360;
+    private final Schema f4370;
+    private final Schema f4380;
+    private final Schema f4390;
+    private final Schema f4400;
+    private final Schema f4410;
+    private final Schema f4420;
+    private final Schema f4430;
+    private final Schema f4440;
+    private final Schema f4450;
+    private final Schema f4460;
+    private final Schema f4470;
+    private final Schema f4480;
+    private final Schema f4490;
+    private final Schema f4500;
+    private final Schema f4510;
+    private final Schema f4520;
+    private final Schema f4530;
+    private final Schema f4540;
+    private final Schema f4550;
+    private final Schema f4560;
+    private final Schema f4570;
+    private final Schema f4580;
+    private final Schema f4590;
+    private final Schema f4600;
+    private final Schema f4610;
+    private final Schema f4620;
+    private final Schema f4630;
+    private final Schema f4640;
+    private final Schema f4650;
+    private final Schema f4660;
+    private final Schema f4670;
+    private final Schema f4680;
+    private final Schema f4690;
+    private final Schema f4700;
+    private final Schema f4710;
+    private final Schema f4720;
+    private final Schema f4730;
+    private final Schema f4740;
+    private final Schema f4750;
+    private final Schema f4760;
+    private final Schema f4770;
+    private final Schema f4780;
+    private final Schema f4790;
+    private final Schema f4800;
+    private final Schema f4810;
+    private final Schema f4820;
+    private final Schema f4830;
+    private final Schema f4840;
+    private final Schema f4850;
+    private final Schema f4860;
+    private final Schema f4870;
+    private final Schema f4880;
+    private final Schema f4890;
+    private final Schema f4900;
+    private final Schema f4910;
+    private final Schema f4920;
+    private final Schema f4930;
+    private final Schema f4940;
+    private final Schema f4950;
+    private final Schema f4960;
+    private final Schema f4970;
+    private final Schema f4980;
+    private final Schema f4990;
+    private final Schema f5000;
+    private final Schema f5010;
+    private final Schema f5020;
+    private final Schema f5030;
+    private final Schema f5040;
+    private final Schema f5050;
+    private final Schema f5060;
+    private final Schema f5070;
+    private final Schema f5080;
+    private final Schema f5090;
+    private final Schema f5100;
+    private final Schema f5110;
+    private final Schema f5120;
+    private final Schema f5130;
+    private final Schema f5140;
+    private final Schema f5150;
+    private final Schema f5160;
+    private final Schema f5170;
+    private final Schema f5180;
+    private final Schema f5190;
+    private final Schema f5200;
+    private final Schema f5210;
+    private final Schema f5220;
+    private final Schema f5230;
+    private final Schema f5240;
+    private final Schema f5250;
+    private final Schema f5260;
+    private final Schema f5270;
+    private final Schema f5280;
+    private final Schema f5290;
+    private final Schema f5300;
+    private final Schema f5310;
+    private final Schema f5320;
+    private final Schema f5330;
+    private final Schema f5340;
+    private final Schema f5350;
+    private final Schema f5360;
+    private final Schema f5370;
+    private final Schema f5380;
+    private final Schema f5390;
+    private final Schema f5400;
+    private final Schema f5410;
+    private final Schema f5420;
+    private final Schema f5430;
+    private final Schema f5440;
+    private final Schema f5450;
+    private final Schema f5460;
+    private final Schema f5470;
+    private final Schema f5480;
+    private final Schema f5490;
+    private final Schema f5500;
+    private final Schema f5510;
+    private final Schema f5520;
+    private final Schema f5530;
+    private final Schema f5540;
+    private final Schema f5550;
+    private final Schema f5560;
+    private final Schema f5570;
+    private final Schema f5580;
+    private final Schema f5590;
+    private final Schema f5600;
+    private final Schema f5610;
+    private final Schema f5620;
+    private final Schema f5630;
+    private final Schema f5640;
+    private final Schema f5650;
+    private final Schema f5660;
+    private final Schema f5670;
+    private final Schema f5680;
+    private final Schema f5690;
+    private final Schema f5700;
+    private final Schema f5710;
+    private final Schema f5720;
+    private final Schema f5730;
+    private final Schema f5740;
+    private final Schema f5750;
+    private final Schema f5760;
+    private final Schema f5770;
+    private final Schema f5780;
+    private final Schema f5790;
+    private final Schema f5800;
+    private final Schema f5810;
+    private final Schema f5820;
+    private final Schema f5830;
+    private final Schema f5840;
+    private final Schema f5850;
+    private final Schema f5860;
+    private final Schema f5870;
+    private final Schema f5880;
+    private final Schema f5890;
+    private final Schema f5900;
+    private final Schema f5910;
+    private final Schema f5920;
+    private final Schema f5930;
+    private final Schema f5940;
+    private final Schema f5950;
+    private final Schema f5960;
+    private final Schema f5970;
+    private final Schema f5980;
+    private final Schema f5990;
+    private final Schema f6000;
+    private final Schema f6010;
+    private final Schema f6020;
+    private final Schema f6030;
+    private final Schema f6040;
+    private final Schema f6050;
+    private final Schema f6060;
+    private final Schema f6070;
+    private final Schema f6080;
+    private final Schema f6090;
+    private final Schema f6100;
+    private final Schema f6110;
+    private final Schema f6120;
+    private final Schema f6130;
+    private final Schema f6140;
+    private final Schema f6150;
+    private final Schema f6160;
+    private final Schema f6170;
+    private final Schema f6180;
+    private final Schema f6190;
+    private final Schema f6200;
+    private final Schema f6210;
+    private final Schema f6220;
+    private final Schema f6230;
+    private final Schema f6240;
+    private final Schema f6250;
+    private final Schema f6260;
+    private final Schema f6270;
+    private final Schema f6280;
+    private final Schema f6290;
+    private final Schema f6300;
+    private final Schema f6310;
+    private final Schema f6320;
+    private final Schema f6330;
+    private final Schema f6340;
+    private final Schema f6350;
+    private final Schema f6360;
+    private final Schema f6370;
+    private final Schema f6380;
+    private final Schema f6390;
+    private final Schema f6400;
+    private final Schema f6410;
+    private final Schema f6420;
+    private final Schema f6430;
+    private final Schema f6440;
+    private final Schema f6450;
+    private final Schema f6460;
+    private final Schema f6470;
+    private final Schema f6480;
+    private final Schema f6490;
+    private final Schema f6500;
+    private final Schema f6510;
+    private final Schema f6520;
+    private final Schema f6530;
+    private final Schema f6540;
+    private final Schema f6550;
+    private final Schema f6560;
+    private final Schema f6570;
+    private final Schema f6580;
+    private final Schema f6590;
+    private final Schema f6600;
+    private final Schema f6610;
+    private final Schema f6620;
+    private final Schema f6630;
+    private final Schema f6640;
+    private final Schema f6650;
+    private final Schema f6660;
+    private final Schema f6670;
+    private final Schema f6680;
+    private final Schema f6690;
+    private final Schema f6700;
+    private final Schema f6710;
+    private final Schema f6720;
+    private final Schema f6730;
+    private final Schema f6740;
+    private final Schema f6750;
+    private final Schema f6760;
+    private final Schema f6770;
+    private final Schema f6780;
+    private final Schema f6790;
+    private final Schema f6800;
+    private final Schema f6810;
+    private final Schema f6820;
+    private final Schema f6830;
+    private final Schema f6840;
+    private final Schema f6850;
+    private final Schema f6860;
+    private final Schema f6870;
+    private final Schema f6880;
+    private final Schema f6890;
+    private final Schema f6900;
+    private final Schema f6910;
+    private final Schema f6920;
+    private final Schema f6930;
+    private final Schema f6940;
+    private final Schema f6950;
+    private final Schema f6960;
+    private final Schema f6970;
+    private final Schema f6980;
+    private final Schema f6990;
+    private final Schema f7000;
+    private final Schema f7010;
+    private final Schema f7020;
+    private final Schema f7030;
+    private final Schema f7040;
+    private final Schema f7050;
+    private final Schema f7060;
+    private final Schema f7070;
+    private final Schema f7080;
+    private final Schema f7090;
+    private final Schema f7100;
+    private final Schema f7110;
+    private final Schema f7120;
+    private final Schema f7130;
+    private final Schema f7140;
+    private final Schema f7150;
+    private final Schema f7160;
+    private final Schema f7170;
+    private final Schema f7180;
+    private final Schema f7190;
+    private final Schema f7200;
+    private final Schema f7210;
+    private final Schema f7220;
+    private final Schema f7230;
+    private final Schema f7240;
+    private final Schema f7250;
+    private final Schema f7260;
+    private final Schema f7270;
+    private final Schema f7280;
+    private final Schema f7290;
+    private final Schema f7300;
+    private final Schema f7310;
+    private final Schema f7320;
+    private final Schema f7330;
+    private final Schema f7340;
+    private final Schema f7350;
+    private final Schema f7360;
+    private final Schema f7370;
+    private final Schema f7380;
+    private final Schema f7390;
+    private final Schema f7400;
+    private final Schema f7410;
+    private final Schema f7420;
+    private final Schema f7430;
+    private final Schema f7440;
+    private final Schema f7450;
+    private final Schema f7460;
+    private final Schema f7470;
+    private final Schema f7480;
+    private final Schema f7490;
+    private final Schema f7500;
+    private final Schema f7510;
+    private final Schema f7520;
+    private final Schema f7530;
+    private final Schema f7540;
+    private final Schema f7550;
+    private final Schema f7560;
+    private final Schema f7570;
+    private final Schema f7580;
+    private final Schema f7590;
+    private final Schema f7600;
+    private final Schema f7610;
+    private final Schema f7620;
+    private final Schema f7630;
+    private final Schema f7640;
+    private final Schema f7650;
+    private final Schema f7660;
+    private final Schema f7670;
+    private final Schema f7680;
+    private final Schema f7690;
+    private final Schema f7700;
+    private final Schema f7710;
+    private final Schema f7720;
+    private final Schema f7730;
+    private final Schema f7740;
+    private final Schema f7750;
+    private final Schema f7760;
+    private final Schema f7770;
+    private final Schema f7780;
+    private final Schema f7790;
+    private final Schema f7800;
+    private final Schema f7810;
+    private final Schema f7820;
+    private final Schema f7830;
+    private final Schema f7840;
+    private final Schema f7850;
+    private final Schema f7860;
+    private final Schema f7870;
+    private final Schema f7880;
+    private final Schema f7890;
+    private final Schema f7900;
+    private final Schema f7910;
+    private final Schema f7920;
+    private final Schema f7930;
+    private final Schema f7940;
+    private final Schema f7950;
+    private final Schema f7960;
+    private final Schema f7970;
+    private final Schema f7980;
+    private final Schema f7990;
+    private final Schema f8000;
+    private final Schema f8010;
+    private final Schema f8020;
+    private final Schema f8030;
+    private final Schema f8040;
+    private final Schema f8050;
+    private final Schema f8060;
+    private final Schema f8070;
+    private final Schema f8080;
+    private final Schema f8090;
+    private final Schema f8100;
+    private final Schema f8110;
+    private final Schema f8120;
+    private final Schema f8130;
+    private final Schema f8140;
+    private final Schema f8150;
+    private final Schema f8160;
+    private final Schema f8170;
+    private final Schema f8180;
+    private final Schema f8190;
+    private final Schema f8200;
+    private final Schema f8210;
+    private final Schema f8220;
+    private final Schema f8230;
+    private final Schema f8240;
+    private final Schema f8250;
+    private final Schema f8260;
+    private final Schema f8270;
+    private final Schema f8280;
+    private final Schema f8290;
+    private final Schema f8300;
+    private final Schema f8310;
+    private final Schema f8320;
+    private final Schema f8330;
+    private final Schema f8340;
+    private final Schema f8350;
+    private final Schema f8360;
+    private final Schema f8370;
+    private final Schema f8380;
+    private final Schema f8390;
+    private final Schema f8400;
+    private final Schema f8410;
+    private final Schema f8420;
+    private final Schema f8430;
+    private final Schema f8440;
+    private final Schema f8450;
+    private final Schema f8460;
+    private final Schema f8470;
+    private final Schema f8480;
+    private final Schema f8490;
+    private final Schema f8500;
+    private final Schema f8510;
+    private final Schema f8520;
+    private final Schema f8530;
+    private final Schema f8540;
+    private final Schema f8550;
+    private final Schema f8560;
+    private final Schema f8570;
+    private final Schema f8580;
+    private final Schema f8590;
+    private final Schema f8600;
+    private final Schema f8610;
+    private final Schema f8620;
+    private final Schema f8630;
+    private final Schema f8640;
+    private final Schema f8650;
+    private final Schema f8660;
+    private final Schema f8670;
+    private final Schema f8680;
+    private final Schema f8690;
+    private final Schema f8700;
+    private final Schema f8710;
+    private final Schema f8720;
+    private final Schema f8730;
+    private final Schema f8740;
+    private final Schema f8750;
+    private final Schema f8760;
+    private final Schema f8770;
+    private final Schema f8780;
+    private final Schema f8790;
+    private final Schema f8800;
+    private final Schema f8810;
+    private final Schema f8820;
+    private final Schema f8830;
+    private final Schema f8840;
+    private final Schema f8850;
+    private final Schema f8860;
+    private final Schema f8870;
+    private final Schema f8880;
+    private final Schema f8890;
+    private final Schema f8900;
+    private final Schema f8910;
+    private final Schema f8920;
+    private final Schema f8930;
+    private final Schema f8940;
+    private final Schema f8950;
+    private final Schema f8960;
+    private final Schema f8970;
+    private final Schema f8980;
+    private final Schema f8990;
+    private final Schema f9000;
+    private final Schema f9010;
+    private final Schema f9020;
+    private final Schema f9030;
+    private final Schema f9040;
+    private final Schema f9050;
+    private final Schema f9060;
+    private final Schema f9070;
+    private final Schema f9080;
+    private final Schema f9090;
+    private final Schema f9100;
+    private final Schema f9110;
+    private final Schema f9120;
+    private final Schema f9130;
+    private final Schema f9140;
+    private final Schema f9150;
+    private final Schema f9160;
+    private final Schema f9170;
+    private final Schema f9180;
+    private final Schema f9190;
+    private final Schema f9200;
+    private final Schema f9210;
+    private final Schema f9220;
+    private final Schema f9230;
+    private final Schema f9240;
+    private final Schema f9250;
+    private final Schema f9260;
+    private final Schema f9270;
+    private final Schema f9280;
+    private final Schema f9290;
+    private final Schema f9300;
+    private final Schema f9310;
+    private final Schema f9320;
+    private final Schema f9330;
+    private final Schema f9340;
+    private final Schema f9350;
+    private final Schema f9360;
+    private final Schema f9370;
+    private final Schema f9380;
+    private final Schema f9390;
+    private final Schema f9400;
+    private final Schema f9410;
+    private final Schema f9420;
+    private final Schema f9430;
+    private final Schema f9440;
+    private final Schema f9450;
+    private final Schema f9460;
+    private final Schema f9470;
+    private final Schema f9480;
+    private final Schema f9490;
+    private final Schema f9500;
+    private final Schema f9510;
+    private final Schema f9520;
+    private final Schema f9530;
+    private final Schema f9540;
+    private final Schema f9550;
+    private final Schema f9560;
+    private final Schema f9570;
+    private final Schema f9580;
+    private final Schema f9590;
+    private final Schema f9600;
+    private final Schema f9610;
+    private final Schema f9620;
+    private final Schema f9630;
+    private final Schema f9640;
+    private final Schema f9650;
+    private final Schema f9660;
+    private final Schema f9670;
+    private final Schema f9680;
+    private final Schema f9690;
+    private final Schema f9700;
+    private final Schema f9710;
+    private final Schema f9720;
+    private final Schema f9730;
+    private final Schema f9740;
+    private final Schema f9750;
+    private final Schema f9760;
+    private final Schema f9770;
+    private final Schema f9780;
+    private final Schema f9790;
+    private final Schema f9800;
+    private final Schema f9810;
+    private final Schema f9820;
+    private final Schema f9830;
+    private final Schema f9840;
+    private final Schema f9850;
+    private final Schema f9860;
+    private final Schema f9870;
+    private final Schema f9880;
+    private final Schema f9890;
+    private final Schema f9900;
+    private final Schema f9910;
+    private final Schema f9920;
+    private final Schema f9930;
+    private final Schema f9940;
+    private final Schema f9950;
+    private final Schema f9960;
+    private final Schema f9970;
+    private final Schema f9980;
+    private final Schema f9990;
+
+    public FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.f00 = readerSchema.getField("F0").schema();
+        this.f10 = readerSchema.getField("F1").schema();
+        this.f20 = readerSchema.getField("F2").schema();
+        this.f30 = readerSchema.getField("F3").schema();
+        this.f40 = readerSchema.getField("F4").schema();
+        this.f50 = readerSchema.getField("F5").schema();
+        this.f60 = readerSchema.getField("F6").schema();
+        this.f70 = readerSchema.getField("F7").schema();
+        this.f80 = readerSchema.getField("F8").schema();
+        this.f90 = readerSchema.getField("F9").schema();
+        this.f100 = readerSchema.getField("F10").schema();
+        this.f110 = readerSchema.getField("F11").schema();
+        this.f120 = readerSchema.getField("F12").schema();
+        this.f130 = readerSchema.getField("F13").schema();
+        this.f140 = readerSchema.getField("F14").schema();
+        this.f150 = readerSchema.getField("F15").schema();
+        this.f160 = readerSchema.getField("F16").schema();
+        this.f170 = readerSchema.getField("F17").schema();
+        this.f180 = readerSchema.getField("F18").schema();
+        this.f190 = readerSchema.getField("F19").schema();
+        this.f200 = readerSchema.getField("F20").schema();
+        this.f210 = readerSchema.getField("F21").schema();
+        this.f220 = readerSchema.getField("F22").schema();
+        this.f230 = readerSchema.getField("F23").schema();
+        this.f240 = readerSchema.getField("F24").schema();
+        this.f250 = readerSchema.getField("F25").schema();
+        this.f260 = readerSchema.getField("F26").schema();
+        this.f270 = readerSchema.getField("F27").schema();
+        this.f280 = readerSchema.getField("F28").schema();
+        this.f290 = readerSchema.getField("F29").schema();
+        this.f300 = readerSchema.getField("F30").schema();
+        this.f310 = readerSchema.getField("F31").schema();
+        this.f320 = readerSchema.getField("F32").schema();
+        this.f330 = readerSchema.getField("F33").schema();
+        this.f340 = readerSchema.getField("F34").schema();
+        this.f350 = readerSchema.getField("F35").schema();
+        this.f360 = readerSchema.getField("F36").schema();
+        this.f370 = readerSchema.getField("F37").schema();
+        this.f380 = readerSchema.getField("F38").schema();
+        this.f390 = readerSchema.getField("F39").schema();
+        this.f400 = readerSchema.getField("F40").schema();
+        this.f410 = readerSchema.getField("F41").schema();
+        this.f420 = readerSchema.getField("F42").schema();
+        this.f430 = readerSchema.getField("F43").schema();
+        this.f440 = readerSchema.getField("F44").schema();
+        this.f450 = readerSchema.getField("F45").schema();
+        this.f460 = readerSchema.getField("F46").schema();
+        this.f470 = readerSchema.getField("F47").schema();
+        this.f480 = readerSchema.getField("F48").schema();
+        this.f490 = readerSchema.getField("F49").schema();
+        this.f500 = readerSchema.getField("F50").schema();
+        this.f510 = readerSchema.getField("F51").schema();
+        this.f520 = readerSchema.getField("F52").schema();
+        this.f530 = readerSchema.getField("F53").schema();
+        this.f540 = readerSchema.getField("F54").schema();
+        this.f550 = readerSchema.getField("F55").schema();
+        this.f560 = readerSchema.getField("F56").schema();
+        this.f570 = readerSchema.getField("F57").schema();
+        this.f580 = readerSchema.getField("F58").schema();
+        this.f590 = readerSchema.getField("F59").schema();
+        this.f600 = readerSchema.getField("F60").schema();
+        this.f610 = readerSchema.getField("F61").schema();
+        this.f620 = readerSchema.getField("F62").schema();
+        this.f630 = readerSchema.getField("F63").schema();
+        this.f640 = readerSchema.getField("F64").schema();
+        this.f650 = readerSchema.getField("F65").schema();
+        this.f660 = readerSchema.getField("F66").schema();
+        this.f670 = readerSchema.getField("F67").schema();
+        this.f680 = readerSchema.getField("F68").schema();
+        this.f690 = readerSchema.getField("F69").schema();
+        this.f700 = readerSchema.getField("F70").schema();
+        this.f710 = readerSchema.getField("F71").schema();
+        this.f720 = readerSchema.getField("F72").schema();
+        this.f730 = readerSchema.getField("F73").schema();
+        this.f740 = readerSchema.getField("F74").schema();
+        this.f750 = readerSchema.getField("F75").schema();
+        this.f760 = readerSchema.getField("F76").schema();
+        this.f770 = readerSchema.getField("F77").schema();
+        this.f780 = readerSchema.getField("F78").schema();
+        this.f790 = readerSchema.getField("F79").schema();
+        this.f800 = readerSchema.getField("F80").schema();
+        this.f810 = readerSchema.getField("F81").schema();
+        this.f820 = readerSchema.getField("F82").schema();
+        this.f830 = readerSchema.getField("F83").schema();
+        this.f840 = readerSchema.getField("F84").schema();
+        this.f850 = readerSchema.getField("F85").schema();
+        this.f860 = readerSchema.getField("F86").schema();
+        this.f870 = readerSchema.getField("F87").schema();
+        this.f880 = readerSchema.getField("F88").schema();
+        this.f890 = readerSchema.getField("F89").schema();
+        this.f900 = readerSchema.getField("F90").schema();
+        this.f910 = readerSchema.getField("F91").schema();
+        this.f920 = readerSchema.getField("F92").schema();
+        this.f930 = readerSchema.getField("F93").schema();
+        this.f940 = readerSchema.getField("F94").schema();
+        this.f950 = readerSchema.getField("F95").schema();
+        this.f960 = readerSchema.getField("F96").schema();
+        this.f970 = readerSchema.getField("F97").schema();
+        this.f980 = readerSchema.getField("F98").schema();
+        this.f990 = readerSchema.getField("F99").schema();
+        this.f1000 = readerSchema.getField("F100").schema();
+        this.f1010 = readerSchema.getField("F101").schema();
+        this.f1020 = readerSchema.getField("F102").schema();
+        this.f1030 = readerSchema.getField("F103").schema();
+        this.f1040 = readerSchema.getField("F104").schema();
+        this.f1050 = readerSchema.getField("F105").schema();
+        this.f1060 = readerSchema.getField("F106").schema();
+        this.f1070 = readerSchema.getField("F107").schema();
+        this.f1080 = readerSchema.getField("F108").schema();
+        this.f1090 = readerSchema.getField("F109").schema();
+        this.f1100 = readerSchema.getField("F110").schema();
+        this.f1110 = readerSchema.getField("F111").schema();
+        this.f1120 = readerSchema.getField("F112").schema();
+        this.f1130 = readerSchema.getField("F113").schema();
+        this.f1140 = readerSchema.getField("F114").schema();
+        this.f1150 = readerSchema.getField("F115").schema();
+        this.f1160 = readerSchema.getField("F116").schema();
+        this.f1170 = readerSchema.getField("F117").schema();
+        this.f1180 = readerSchema.getField("F118").schema();
+        this.f1190 = readerSchema.getField("F119").schema();
+        this.f1200 = readerSchema.getField("F120").schema();
+        this.f1210 = readerSchema.getField("F121").schema();
+        this.f1220 = readerSchema.getField("F122").schema();
+        this.f1230 = readerSchema.getField("F123").schema();
+        this.f1240 = readerSchema.getField("F124").schema();
+        this.f1250 = readerSchema.getField("F125").schema();
+        this.f1260 = readerSchema.getField("F126").schema();
+        this.f1270 = readerSchema.getField("F127").schema();
+        this.f1280 = readerSchema.getField("F128").schema();
+        this.f1290 = readerSchema.getField("F129").schema();
+        this.f1300 = readerSchema.getField("F130").schema();
+        this.f1310 = readerSchema.getField("F131").schema();
+        this.f1320 = readerSchema.getField("F132").schema();
+        this.f1330 = readerSchema.getField("F133").schema();
+        this.f1340 = readerSchema.getField("F134").schema();
+        this.f1350 = readerSchema.getField("F135").schema();
+        this.f1360 = readerSchema.getField("F136").schema();
+        this.f1370 = readerSchema.getField("F137").schema();
+        this.f1380 = readerSchema.getField("F138").schema();
+        this.f1390 = readerSchema.getField("F139").schema();
+        this.f1400 = readerSchema.getField("F140").schema();
+        this.f1410 = readerSchema.getField("F141").schema();
+        this.f1420 = readerSchema.getField("F142").schema();
+        this.f1430 = readerSchema.getField("F143").schema();
+        this.f1440 = readerSchema.getField("F144").schema();
+        this.f1450 = readerSchema.getField("F145").schema();
+        this.f1460 = readerSchema.getField("F146").schema();
+        this.f1470 = readerSchema.getField("F147").schema();
+        this.f1480 = readerSchema.getField("F148").schema();
+        this.f1490 = readerSchema.getField("F149").schema();
+        this.f1500 = readerSchema.getField("F150").schema();
+        this.f1510 = readerSchema.getField("F151").schema();
+        this.f1520 = readerSchema.getField("F152").schema();
+        this.f1530 = readerSchema.getField("F153").schema();
+        this.f1540 = readerSchema.getField("F154").schema();
+        this.f1550 = readerSchema.getField("F155").schema();
+        this.f1560 = readerSchema.getField("F156").schema();
+        this.f1570 = readerSchema.getField("F157").schema();
+        this.f1580 = readerSchema.getField("F158").schema();
+        this.f1590 = readerSchema.getField("F159").schema();
+        this.f1600 = readerSchema.getField("F160").schema();
+        this.f1610 = readerSchema.getField("F161").schema();
+        this.f1620 = readerSchema.getField("F162").schema();
+        this.f1630 = readerSchema.getField("F163").schema();
+        this.f1640 = readerSchema.getField("F164").schema();
+        this.f1650 = readerSchema.getField("F165").schema();
+        this.f1660 = readerSchema.getField("F166").schema();
+        this.f1670 = readerSchema.getField("F167").schema();
+        this.f1680 = readerSchema.getField("F168").schema();
+        this.f1690 = readerSchema.getField("F169").schema();
+        this.f1700 = readerSchema.getField("F170").schema();
+        this.f1710 = readerSchema.getField("F171").schema();
+        this.f1720 = readerSchema.getField("F172").schema();
+        this.f1730 = readerSchema.getField("F173").schema();
+        this.f1740 = readerSchema.getField("F174").schema();
+        this.f1750 = readerSchema.getField("F175").schema();
+        this.f1760 = readerSchema.getField("F176").schema();
+        this.f1770 = readerSchema.getField("F177").schema();
+        this.f1780 = readerSchema.getField("F178").schema();
+        this.f1790 = readerSchema.getField("F179").schema();
+        this.f1800 = readerSchema.getField("F180").schema();
+        this.f1810 = readerSchema.getField("F181").schema();
+        this.f1820 = readerSchema.getField("F182").schema();
+        this.f1830 = readerSchema.getField("F183").schema();
+        this.f1840 = readerSchema.getField("F184").schema();
+        this.f1850 = readerSchema.getField("F185").schema();
+        this.f1860 = readerSchema.getField("F186").schema();
+        this.f1870 = readerSchema.getField("F187").schema();
+        this.f1880 = readerSchema.getField("F188").schema();
+        this.f1890 = readerSchema.getField("F189").schema();
+        this.f1900 = readerSchema.getField("F190").schema();
+        this.f1910 = readerSchema.getField("F191").schema();
+        this.f1920 = readerSchema.getField("F192").schema();
+        this.f1930 = readerSchema.getField("F193").schema();
+        this.f1940 = readerSchema.getField("F194").schema();
+        this.f1950 = readerSchema.getField("F195").schema();
+        this.f1960 = readerSchema.getField("F196").schema();
+        this.f1970 = readerSchema.getField("F197").schema();
+        this.f1980 = readerSchema.getField("F198").schema();
+        this.f1990 = readerSchema.getField("F199").schema();
+        this.f2000 = readerSchema.getField("F200").schema();
+        this.f2010 = readerSchema.getField("F201").schema();
+        this.f2020 = readerSchema.getField("F202").schema();
+        this.f2030 = readerSchema.getField("F203").schema();
+        this.f2040 = readerSchema.getField("F204").schema();
+        this.f2050 = readerSchema.getField("F205").schema();
+        this.f2060 = readerSchema.getField("F206").schema();
+        this.f2070 = readerSchema.getField("F207").schema();
+        this.f2080 = readerSchema.getField("F208").schema();
+        this.f2090 = readerSchema.getField("F209").schema();
+        this.f2100 = readerSchema.getField("F210").schema();
+        this.f2110 = readerSchema.getField("F211").schema();
+        this.f2120 = readerSchema.getField("F212").schema();
+        this.f2130 = readerSchema.getField("F213").schema();
+        this.f2140 = readerSchema.getField("F214").schema();
+        this.f2150 = readerSchema.getField("F215").schema();
+        this.f2160 = readerSchema.getField("F216").schema();
+        this.f2170 = readerSchema.getField("F217").schema();
+        this.f2180 = readerSchema.getField("F218").schema();
+        this.f2190 = readerSchema.getField("F219").schema();
+        this.f2200 = readerSchema.getField("F220").schema();
+        this.f2210 = readerSchema.getField("F221").schema();
+        this.f2220 = readerSchema.getField("F222").schema();
+        this.f2230 = readerSchema.getField("F223").schema();
+        this.f2240 = readerSchema.getField("F224").schema();
+        this.f2250 = readerSchema.getField("F225").schema();
+        this.f2260 = readerSchema.getField("F226").schema();
+        this.f2270 = readerSchema.getField("F227").schema();
+        this.f2280 = readerSchema.getField("F228").schema();
+        this.f2290 = readerSchema.getField("F229").schema();
+        this.f2300 = readerSchema.getField("F230").schema();
+        this.f2310 = readerSchema.getField("F231").schema();
+        this.f2320 = readerSchema.getField("F232").schema();
+        this.f2330 = readerSchema.getField("F233").schema();
+        this.f2340 = readerSchema.getField("F234").schema();
+        this.f2350 = readerSchema.getField("F235").schema();
+        this.f2360 = readerSchema.getField("F236").schema();
+        this.f2370 = readerSchema.getField("F237").schema();
+        this.f2380 = readerSchema.getField("F238").schema();
+        this.f2390 = readerSchema.getField("F239").schema();
+        this.f2400 = readerSchema.getField("F240").schema();
+        this.f2410 = readerSchema.getField("F241").schema();
+        this.f2420 = readerSchema.getField("F242").schema();
+        this.f2430 = readerSchema.getField("F243").schema();
+        this.f2440 = readerSchema.getField("F244").schema();
+        this.f2450 = readerSchema.getField("F245").schema();
+        this.f2460 = readerSchema.getField("F246").schema();
+        this.f2470 = readerSchema.getField("F247").schema();
+        this.f2480 = readerSchema.getField("F248").schema();
+        this.f2490 = readerSchema.getField("F249").schema();
+        this.f2500 = readerSchema.getField("F250").schema();
+        this.f2510 = readerSchema.getField("F251").schema();
+        this.f2520 = readerSchema.getField("F252").schema();
+        this.f2530 = readerSchema.getField("F253").schema();
+        this.f2540 = readerSchema.getField("F254").schema();
+        this.f2550 = readerSchema.getField("F255").schema();
+        this.f2560 = readerSchema.getField("F256").schema();
+        this.f2570 = readerSchema.getField("F257").schema();
+        this.f2580 = readerSchema.getField("F258").schema();
+        this.f2590 = readerSchema.getField("F259").schema();
+        this.f2600 = readerSchema.getField("F260").schema();
+        this.f2610 = readerSchema.getField("F261").schema();
+        this.f2620 = readerSchema.getField("F262").schema();
+        this.f2630 = readerSchema.getField("F263").schema();
+        this.f2640 = readerSchema.getField("F264").schema();
+        this.f2650 = readerSchema.getField("F265").schema();
+        this.f2660 = readerSchema.getField("F266").schema();
+        this.f2670 = readerSchema.getField("F267").schema();
+        this.f2680 = readerSchema.getField("F268").schema();
+        this.f2690 = readerSchema.getField("F269").schema();
+        this.f2700 = readerSchema.getField("F270").schema();
+        this.f2710 = readerSchema.getField("F271").schema();
+        this.f2720 = readerSchema.getField("F272").schema();
+        this.f2730 = readerSchema.getField("F273").schema();
+        this.f2740 = readerSchema.getField("F274").schema();
+        this.f2750 = readerSchema.getField("F275").schema();
+        this.f2760 = readerSchema.getField("F276").schema();
+        this.f2770 = readerSchema.getField("F277").schema();
+        this.f2780 = readerSchema.getField("F278").schema();
+        this.f2790 = readerSchema.getField("F279").schema();
+        this.f2800 = readerSchema.getField("F280").schema();
+        this.f2810 = readerSchema.getField("F281").schema();
+        this.f2820 = readerSchema.getField("F282").schema();
+        this.f2830 = readerSchema.getField("F283").schema();
+        this.f2840 = readerSchema.getField("F284").schema();
+        this.f2850 = readerSchema.getField("F285").schema();
+        this.f2860 = readerSchema.getField("F286").schema();
+        this.f2870 = readerSchema.getField("F287").schema();
+        this.f2880 = readerSchema.getField("F288").schema();
+        this.f2890 = readerSchema.getField("F289").schema();
+        this.f2900 = readerSchema.getField("F290").schema();
+        this.f2910 = readerSchema.getField("F291").schema();
+        this.f2920 = readerSchema.getField("F292").schema();
+        this.f2930 = readerSchema.getField("F293").schema();
+        this.f2940 = readerSchema.getField("F294").schema();
+        this.f2950 = readerSchema.getField("F295").schema();
+        this.f2960 = readerSchema.getField("F296").schema();
+        this.f2970 = readerSchema.getField("F297").schema();
+        this.f2980 = readerSchema.getField("F298").schema();
+        this.f2990 = readerSchema.getField("F299").schema();
+        this.f3000 = readerSchema.getField("F300").schema();
+        this.f3010 = readerSchema.getField("F301").schema();
+        this.f3020 = readerSchema.getField("F302").schema();
+        this.f3030 = readerSchema.getField("F303").schema();
+        this.f3040 = readerSchema.getField("F304").schema();
+        this.f3050 = readerSchema.getField("F305").schema();
+        this.f3060 = readerSchema.getField("F306").schema();
+        this.f3070 = readerSchema.getField("F307").schema();
+        this.f3080 = readerSchema.getField("F308").schema();
+        this.f3090 = readerSchema.getField("F309").schema();
+        this.f3100 = readerSchema.getField("F310").schema();
+        this.f3110 = readerSchema.getField("F311").schema();
+        this.f3120 = readerSchema.getField("F312").schema();
+        this.f3130 = readerSchema.getField("F313").schema();
+        this.f3140 = readerSchema.getField("F314").schema();
+        this.f3150 = readerSchema.getField("F315").schema();
+        this.f3160 = readerSchema.getField("F316").schema();
+        this.f3170 = readerSchema.getField("F317").schema();
+        this.f3180 = readerSchema.getField("F318").schema();
+        this.f3190 = readerSchema.getField("F319").schema();
+        this.f3200 = readerSchema.getField("F320").schema();
+        this.f3210 = readerSchema.getField("F321").schema();
+        this.f3220 = readerSchema.getField("F322").schema();
+        this.f3230 = readerSchema.getField("F323").schema();
+        this.f3240 = readerSchema.getField("F324").schema();
+        this.f3250 = readerSchema.getField("F325").schema();
+        this.f3260 = readerSchema.getField("F326").schema();
+        this.f3270 = readerSchema.getField("F327").schema();
+        this.f3280 = readerSchema.getField("F328").schema();
+        this.f3290 = readerSchema.getField("F329").schema();
+        this.f3300 = readerSchema.getField("F330").schema();
+        this.f3310 = readerSchema.getField("F331").schema();
+        this.f3320 = readerSchema.getField("F332").schema();
+        this.f3330 = readerSchema.getField("F333").schema();
+        this.f3340 = readerSchema.getField("F334").schema();
+        this.f3350 = readerSchema.getField("F335").schema();
+        this.f3360 = readerSchema.getField("F336").schema();
+        this.f3370 = readerSchema.getField("F337").schema();
+        this.f3380 = readerSchema.getField("F338").schema();
+        this.f3390 = readerSchema.getField("F339").schema();
+        this.f3400 = readerSchema.getField("F340").schema();
+        this.f3410 = readerSchema.getField("F341").schema();
+        this.f3420 = readerSchema.getField("F342").schema();
+        this.f3430 = readerSchema.getField("F343").schema();
+        this.f3440 = readerSchema.getField("F344").schema();
+        this.f3450 = readerSchema.getField("F345").schema();
+        this.f3460 = readerSchema.getField("F346").schema();
+        this.f3470 = readerSchema.getField("F347").schema();
+        this.f3480 = readerSchema.getField("F348").schema();
+        this.f3490 = readerSchema.getField("F349").schema();
+        this.f3500 = readerSchema.getField("F350").schema();
+        this.f3510 = readerSchema.getField("F351").schema();
+        this.f3520 = readerSchema.getField("F352").schema();
+        this.f3530 = readerSchema.getField("F353").schema();
+        this.f3540 = readerSchema.getField("F354").schema();
+        this.f3550 = readerSchema.getField("F355").schema();
+        this.f3560 = readerSchema.getField("F356").schema();
+        this.f3570 = readerSchema.getField("F357").schema();
+        this.f3580 = readerSchema.getField("F358").schema();
+        this.f3590 = readerSchema.getField("F359").schema();
+        this.f3600 = readerSchema.getField("F360").schema();
+        this.f3610 = readerSchema.getField("F361").schema();
+        this.f3620 = readerSchema.getField("F362").schema();
+        this.f3630 = readerSchema.getField("F363").schema();
+        this.f3640 = readerSchema.getField("F364").schema();
+        this.f3650 = readerSchema.getField("F365").schema();
+        this.f3660 = readerSchema.getField("F366").schema();
+        this.f3670 = readerSchema.getField("F367").schema();
+        this.f3680 = readerSchema.getField("F368").schema();
+        this.f3690 = readerSchema.getField("F369").schema();
+        this.f3700 = readerSchema.getField("F370").schema();
+        this.f3710 = readerSchema.getField("F371").schema();
+        this.f3720 = readerSchema.getField("F372").schema();
+        this.f3730 = readerSchema.getField("F373").schema();
+        this.f3740 = readerSchema.getField("F374").schema();
+        this.f3750 = readerSchema.getField("F375").schema();
+        this.f3760 = readerSchema.getField("F376").schema();
+        this.f3770 = readerSchema.getField("F377").schema();
+        this.f3780 = readerSchema.getField("F378").schema();
+        this.f3790 = readerSchema.getField("F379").schema();
+        this.f3800 = readerSchema.getField("F380").schema();
+        this.f3810 = readerSchema.getField("F381").schema();
+        this.f3820 = readerSchema.getField("F382").schema();
+        this.f3830 = readerSchema.getField("F383").schema();
+        this.f3840 = readerSchema.getField("F384").schema();
+        this.f3850 = readerSchema.getField("F385").schema();
+        this.f3860 = readerSchema.getField("F386").schema();
+        this.f3870 = readerSchema.getField("F387").schema();
+        this.f3880 = readerSchema.getField("F388").schema();
+        this.f3890 = readerSchema.getField("F389").schema();
+        this.f3900 = readerSchema.getField("F390").schema();
+        this.f3910 = readerSchema.getField("F391").schema();
+        this.f3920 = readerSchema.getField("F392").schema();
+        this.f3930 = readerSchema.getField("F393").schema();
+        this.f3940 = readerSchema.getField("F394").schema();
+        this.f3950 = readerSchema.getField("F395").schema();
+        this.f3960 = readerSchema.getField("F396").schema();
+        this.f3970 = readerSchema.getField("F397").schema();
+        this.f3980 = readerSchema.getField("F398").schema();
+        this.f3990 = readerSchema.getField("F399").schema();
+        this.f4000 = readerSchema.getField("F400").schema();
+        this.f4010 = readerSchema.getField("F401").schema();
+        this.f4020 = readerSchema.getField("F402").schema();
+        this.f4030 = readerSchema.getField("F403").schema();
+        this.f4040 = readerSchema.getField("F404").schema();
+        this.f4050 = readerSchema.getField("F405").schema();
+        this.f4060 = readerSchema.getField("F406").schema();
+        this.f4070 = readerSchema.getField("F407").schema();
+        this.f4080 = readerSchema.getField("F408").schema();
+        this.f4090 = readerSchema.getField("F409").schema();
+        this.f4100 = readerSchema.getField("F410").schema();
+        this.f4110 = readerSchema.getField("F411").schema();
+        this.f4120 = readerSchema.getField("F412").schema();
+        this.f4130 = readerSchema.getField("F413").schema();
+        this.f4140 = readerSchema.getField("F414").schema();
+        this.f4150 = readerSchema.getField("F415").schema();
+        this.f4160 = readerSchema.getField("F416").schema();
+        this.f4170 = readerSchema.getField("F417").schema();
+        this.f4180 = readerSchema.getField("F418").schema();
+        this.f4190 = readerSchema.getField("F419").schema();
+        this.f4200 = readerSchema.getField("F420").schema();
+        this.f4210 = readerSchema.getField("F421").schema();
+        this.f4220 = readerSchema.getField("F422").schema();
+        this.f4230 = readerSchema.getField("F423").schema();
+        this.f4240 = readerSchema.getField("F424").schema();
+        this.f4250 = readerSchema.getField("F425").schema();
+        this.f4260 = readerSchema.getField("F426").schema();
+        this.f4270 = readerSchema.getField("F427").schema();
+        this.f4280 = readerSchema.getField("F428").schema();
+        this.f4290 = readerSchema.getField("F429").schema();
+        this.f4300 = readerSchema.getField("F430").schema();
+        this.f4310 = readerSchema.getField("F431").schema();
+        this.f4320 = readerSchema.getField("F432").schema();
+        this.f4330 = readerSchema.getField("F433").schema();
+        this.f4340 = readerSchema.getField("F434").schema();
+        this.f4350 = readerSchema.getField("F435").schema();
+        this.f4360 = readerSchema.getField("F436").schema();
+        this.f4370 = readerSchema.getField("F437").schema();
+        this.f4380 = readerSchema.getField("F438").schema();
+        this.f4390 = readerSchema.getField("F439").schema();
+        this.f4400 = readerSchema.getField("F440").schema();
+        this.f4410 = readerSchema.getField("F441").schema();
+        this.f4420 = readerSchema.getField("F442").schema();
+        this.f4430 = readerSchema.getField("F443").schema();
+        this.f4440 = readerSchema.getField("F444").schema();
+        this.f4450 = readerSchema.getField("F445").schema();
+        this.f4460 = readerSchema.getField("F446").schema();
+        this.f4470 = readerSchema.getField("F447").schema();
+        this.f4480 = readerSchema.getField("F448").schema();
+        this.f4490 = readerSchema.getField("F449").schema();
+        this.f4500 = readerSchema.getField("F450").schema();
+        this.f4510 = readerSchema.getField("F451").schema();
+        this.f4520 = readerSchema.getField("F452").schema();
+        this.f4530 = readerSchema.getField("F453").schema();
+        this.f4540 = readerSchema.getField("F454").schema();
+        this.f4550 = readerSchema.getField("F455").schema();
+        this.f4560 = readerSchema.getField("F456").schema();
+        this.f4570 = readerSchema.getField("F457").schema();
+        this.f4580 = readerSchema.getField("F458").schema();
+        this.f4590 = readerSchema.getField("F459").schema();
+        this.f4600 = readerSchema.getField("F460").schema();
+        this.f4610 = readerSchema.getField("F461").schema();
+        this.f4620 = readerSchema.getField("F462").schema();
+        this.f4630 = readerSchema.getField("F463").schema();
+        this.f4640 = readerSchema.getField("F464").schema();
+        this.f4650 = readerSchema.getField("F465").schema();
+        this.f4660 = readerSchema.getField("F466").schema();
+        this.f4670 = readerSchema.getField("F467").schema();
+        this.f4680 = readerSchema.getField("F468").schema();
+        this.f4690 = readerSchema.getField("F469").schema();
+        this.f4700 = readerSchema.getField("F470").schema();
+        this.f4710 = readerSchema.getField("F471").schema();
+        this.f4720 = readerSchema.getField("F472").schema();
+        this.f4730 = readerSchema.getField("F473").schema();
+        this.f4740 = readerSchema.getField("F474").schema();
+        this.f4750 = readerSchema.getField("F475").schema();
+        this.f4760 = readerSchema.getField("F476").schema();
+        this.f4770 = readerSchema.getField("F477").schema();
+        this.f4780 = readerSchema.getField("F478").schema();
+        this.f4790 = readerSchema.getField("F479").schema();
+        this.f4800 = readerSchema.getField("F480").schema();
+        this.f4810 = readerSchema.getField("F481").schema();
+        this.f4820 = readerSchema.getField("F482").schema();
+        this.f4830 = readerSchema.getField("F483").schema();
+        this.f4840 = readerSchema.getField("F484").schema();
+        this.f4850 = readerSchema.getField("F485").schema();
+        this.f4860 = readerSchema.getField("F486").schema();
+        this.f4870 = readerSchema.getField("F487").schema();
+        this.f4880 = readerSchema.getField("F488").schema();
+        this.f4890 = readerSchema.getField("F489").schema();
+        this.f4900 = readerSchema.getField("F490").schema();
+        this.f4910 = readerSchema.getField("F491").schema();
+        this.f4920 = readerSchema.getField("F492").schema();
+        this.f4930 = readerSchema.getField("F493").schema();
+        this.f4940 = readerSchema.getField("F494").schema();
+        this.f4950 = readerSchema.getField("F495").schema();
+        this.f4960 = readerSchema.getField("F496").schema();
+        this.f4970 = readerSchema.getField("F497").schema();
+        this.f4980 = readerSchema.getField("F498").schema();
+        this.f4990 = readerSchema.getField("F499").schema();
+        this.f5000 = readerSchema.getField("F500").schema();
+        this.f5010 = readerSchema.getField("F501").schema();
+        this.f5020 = readerSchema.getField("F502").schema();
+        this.f5030 = readerSchema.getField("F503").schema();
+        this.f5040 = readerSchema.getField("F504").schema();
+        this.f5050 = readerSchema.getField("F505").schema();
+        this.f5060 = readerSchema.getField("F506").schema();
+        this.f5070 = readerSchema.getField("F507").schema();
+        this.f5080 = readerSchema.getField("F508").schema();
+        this.f5090 = readerSchema.getField("F509").schema();
+        this.f5100 = readerSchema.getField("F510").schema();
+        this.f5110 = readerSchema.getField("F511").schema();
+        this.f5120 = readerSchema.getField("F512").schema();
+        this.f5130 = readerSchema.getField("F513").schema();
+        this.f5140 = readerSchema.getField("F514").schema();
+        this.f5150 = readerSchema.getField("F515").schema();
+        this.f5160 = readerSchema.getField("F516").schema();
+        this.f5170 = readerSchema.getField("F517").schema();
+        this.f5180 = readerSchema.getField("F518").schema();
+        this.f5190 = readerSchema.getField("F519").schema();
+        this.f5200 = readerSchema.getField("F520").schema();
+        this.f5210 = readerSchema.getField("F521").schema();
+        this.f5220 = readerSchema.getField("F522").schema();
+        this.f5230 = readerSchema.getField("F523").schema();
+        this.f5240 = readerSchema.getField("F524").schema();
+        this.f5250 = readerSchema.getField("F525").schema();
+        this.f5260 = readerSchema.getField("F526").schema();
+        this.f5270 = readerSchema.getField("F527").schema();
+        this.f5280 = readerSchema.getField("F528").schema();
+        this.f5290 = readerSchema.getField("F529").schema();
+        this.f5300 = readerSchema.getField("F530").schema();
+        this.f5310 = readerSchema.getField("F531").schema();
+        this.f5320 = readerSchema.getField("F532").schema();
+        this.f5330 = readerSchema.getField("F533").schema();
+        this.f5340 = readerSchema.getField("F534").schema();
+        this.f5350 = readerSchema.getField("F535").schema();
+        this.f5360 = readerSchema.getField("F536").schema();
+        this.f5370 = readerSchema.getField("F537").schema();
+        this.f5380 = readerSchema.getField("F538").schema();
+        this.f5390 = readerSchema.getField("F539").schema();
+        this.f5400 = readerSchema.getField("F540").schema();
+        this.f5410 = readerSchema.getField("F541").schema();
+        this.f5420 = readerSchema.getField("F542").schema();
+        this.f5430 = readerSchema.getField("F543").schema();
+        this.f5440 = readerSchema.getField("F544").schema();
+        this.f5450 = readerSchema.getField("F545").schema();
+        this.f5460 = readerSchema.getField("F546").schema();
+        this.f5470 = readerSchema.getField("F547").schema();
+        this.f5480 = readerSchema.getField("F548").schema();
+        this.f5490 = readerSchema.getField("F549").schema();
+        this.f5500 = readerSchema.getField("F550").schema();
+        this.f5510 = readerSchema.getField("F551").schema();
+        this.f5520 = readerSchema.getField("F552").schema();
+        this.f5530 = readerSchema.getField("F553").schema();
+        this.f5540 = readerSchema.getField("F554").schema();
+        this.f5550 = readerSchema.getField("F555").schema();
+        this.f5560 = readerSchema.getField("F556").schema();
+        this.f5570 = readerSchema.getField("F557").schema();
+        this.f5580 = readerSchema.getField("F558").schema();
+        this.f5590 = readerSchema.getField("F559").schema();
+        this.f5600 = readerSchema.getField("F560").schema();
+        this.f5610 = readerSchema.getField("F561").schema();
+        this.f5620 = readerSchema.getField("F562").schema();
+        this.f5630 = readerSchema.getField("F563").schema();
+        this.f5640 = readerSchema.getField("F564").schema();
+        this.f5650 = readerSchema.getField("F565").schema();
+        this.f5660 = readerSchema.getField("F566").schema();
+        this.f5670 = readerSchema.getField("F567").schema();
+        this.f5680 = readerSchema.getField("F568").schema();
+        this.f5690 = readerSchema.getField("F569").schema();
+        this.f5700 = readerSchema.getField("F570").schema();
+        this.f5710 = readerSchema.getField("F571").schema();
+        this.f5720 = readerSchema.getField("F572").schema();
+        this.f5730 = readerSchema.getField("F573").schema();
+        this.f5740 = readerSchema.getField("F574").schema();
+        this.f5750 = readerSchema.getField("F575").schema();
+        this.f5760 = readerSchema.getField("F576").schema();
+        this.f5770 = readerSchema.getField("F577").schema();
+        this.f5780 = readerSchema.getField("F578").schema();
+        this.f5790 = readerSchema.getField("F579").schema();
+        this.f5800 = readerSchema.getField("F580").schema();
+        this.f5810 = readerSchema.getField("F581").schema();
+        this.f5820 = readerSchema.getField("F582").schema();
+        this.f5830 = readerSchema.getField("F583").schema();
+        this.f5840 = readerSchema.getField("F584").schema();
+        this.f5850 = readerSchema.getField("F585").schema();
+        this.f5860 = readerSchema.getField("F586").schema();
+        this.f5870 = readerSchema.getField("F587").schema();
+        this.f5880 = readerSchema.getField("F588").schema();
+        this.f5890 = readerSchema.getField("F589").schema();
+        this.f5900 = readerSchema.getField("F590").schema();
+        this.f5910 = readerSchema.getField("F591").schema();
+        this.f5920 = readerSchema.getField("F592").schema();
+        this.f5930 = readerSchema.getField("F593").schema();
+        this.f5940 = readerSchema.getField("F594").schema();
+        this.f5950 = readerSchema.getField("F595").schema();
+        this.f5960 = readerSchema.getField("F596").schema();
+        this.f5970 = readerSchema.getField("F597").schema();
+        this.f5980 = readerSchema.getField("F598").schema();
+        this.f5990 = readerSchema.getField("F599").schema();
+        this.f6000 = readerSchema.getField("F600").schema();
+        this.f6010 = readerSchema.getField("F601").schema();
+        this.f6020 = readerSchema.getField("F602").schema();
+        this.f6030 = readerSchema.getField("F603").schema();
+        this.f6040 = readerSchema.getField("F604").schema();
+        this.f6050 = readerSchema.getField("F605").schema();
+        this.f6060 = readerSchema.getField("F606").schema();
+        this.f6070 = readerSchema.getField("F607").schema();
+        this.f6080 = readerSchema.getField("F608").schema();
+        this.f6090 = readerSchema.getField("F609").schema();
+        this.f6100 = readerSchema.getField("F610").schema();
+        this.f6110 = readerSchema.getField("F611").schema();
+        this.f6120 = readerSchema.getField("F612").schema();
+        this.f6130 = readerSchema.getField("F613").schema();
+        this.f6140 = readerSchema.getField("F614").schema();
+        this.f6150 = readerSchema.getField("F615").schema();
+        this.f6160 = readerSchema.getField("F616").schema();
+        this.f6170 = readerSchema.getField("F617").schema();
+        this.f6180 = readerSchema.getField("F618").schema();
+        this.f6190 = readerSchema.getField("F619").schema();
+        this.f6200 = readerSchema.getField("F620").schema();
+        this.f6210 = readerSchema.getField("F621").schema();
+        this.f6220 = readerSchema.getField("F622").schema();
+        this.f6230 = readerSchema.getField("F623").schema();
+        this.f6240 = readerSchema.getField("F624").schema();
+        this.f6250 = readerSchema.getField("F625").schema();
+        this.f6260 = readerSchema.getField("F626").schema();
+        this.f6270 = readerSchema.getField("F627").schema();
+        this.f6280 = readerSchema.getField("F628").schema();
+        this.f6290 = readerSchema.getField("F629").schema();
+        this.f6300 = readerSchema.getField("F630").schema();
+        this.f6310 = readerSchema.getField("F631").schema();
+        this.f6320 = readerSchema.getField("F632").schema();
+        this.f6330 = readerSchema.getField("F633").schema();
+        this.f6340 = readerSchema.getField("F634").schema();
+        this.f6350 = readerSchema.getField("F635").schema();
+        this.f6360 = readerSchema.getField("F636").schema();
+        this.f6370 = readerSchema.getField("F637").schema();
+        this.f6380 = readerSchema.getField("F638").schema();
+        this.f6390 = readerSchema.getField("F639").schema();
+        this.f6400 = readerSchema.getField("F640").schema();
+        this.f6410 = readerSchema.getField("F641").schema();
+        this.f6420 = readerSchema.getField("F642").schema();
+        this.f6430 = readerSchema.getField("F643").schema();
+        this.f6440 = readerSchema.getField("F644").schema();
+        this.f6450 = readerSchema.getField("F645").schema();
+        this.f6460 = readerSchema.getField("F646").schema();
+        this.f6470 = readerSchema.getField("F647").schema();
+        this.f6480 = readerSchema.getField("F648").schema();
+        this.f6490 = readerSchema.getField("F649").schema();
+        this.f6500 = readerSchema.getField("F650").schema();
+        this.f6510 = readerSchema.getField("F651").schema();
+        this.f6520 = readerSchema.getField("F652").schema();
+        this.f6530 = readerSchema.getField("F653").schema();
+        this.f6540 = readerSchema.getField("F654").schema();
+        this.f6550 = readerSchema.getField("F655").schema();
+        this.f6560 = readerSchema.getField("F656").schema();
+        this.f6570 = readerSchema.getField("F657").schema();
+        this.f6580 = readerSchema.getField("F658").schema();
+        this.f6590 = readerSchema.getField("F659").schema();
+        this.f6600 = readerSchema.getField("F660").schema();
+        this.f6610 = readerSchema.getField("F661").schema();
+        this.f6620 = readerSchema.getField("F662").schema();
+        this.f6630 = readerSchema.getField("F663").schema();
+        this.f6640 = readerSchema.getField("F664").schema();
+        this.f6650 = readerSchema.getField("F665").schema();
+        this.f6660 = readerSchema.getField("F666").schema();
+        this.f6670 = readerSchema.getField("F667").schema();
+        this.f6680 = readerSchema.getField("F668").schema();
+        this.f6690 = readerSchema.getField("F669").schema();
+        this.f6700 = readerSchema.getField("F670").schema();
+        this.f6710 = readerSchema.getField("F671").schema();
+        this.f6720 = readerSchema.getField("F672").schema();
+        this.f6730 = readerSchema.getField("F673").schema();
+        this.f6740 = readerSchema.getField("F674").schema();
+        this.f6750 = readerSchema.getField("F675").schema();
+        this.f6760 = readerSchema.getField("F676").schema();
+        this.f6770 = readerSchema.getField("F677").schema();
+        this.f6780 = readerSchema.getField("F678").schema();
+        this.f6790 = readerSchema.getField("F679").schema();
+        this.f6800 = readerSchema.getField("F680").schema();
+        this.f6810 = readerSchema.getField("F681").schema();
+        this.f6820 = readerSchema.getField("F682").schema();
+        this.f6830 = readerSchema.getField("F683").schema();
+        this.f6840 = readerSchema.getField("F684").schema();
+        this.f6850 = readerSchema.getField("F685").schema();
+        this.f6860 = readerSchema.getField("F686").schema();
+        this.f6870 = readerSchema.getField("F687").schema();
+        this.f6880 = readerSchema.getField("F688").schema();
+        this.f6890 = readerSchema.getField("F689").schema();
+        this.f6900 = readerSchema.getField("F690").schema();
+        this.f6910 = readerSchema.getField("F691").schema();
+        this.f6920 = readerSchema.getField("F692").schema();
+        this.f6930 = readerSchema.getField("F693").schema();
+        this.f6940 = readerSchema.getField("F694").schema();
+        this.f6950 = readerSchema.getField("F695").schema();
+        this.f6960 = readerSchema.getField("F696").schema();
+        this.f6970 = readerSchema.getField("F697").schema();
+        this.f6980 = readerSchema.getField("F698").schema();
+        this.f6990 = readerSchema.getField("F699").schema();
+        this.f7000 = readerSchema.getField("F700").schema();
+        this.f7010 = readerSchema.getField("F701").schema();
+        this.f7020 = readerSchema.getField("F702").schema();
+        this.f7030 = readerSchema.getField("F703").schema();
+        this.f7040 = readerSchema.getField("F704").schema();
+        this.f7050 = readerSchema.getField("F705").schema();
+        this.f7060 = readerSchema.getField("F706").schema();
+        this.f7070 = readerSchema.getField("F707").schema();
+        this.f7080 = readerSchema.getField("F708").schema();
+        this.f7090 = readerSchema.getField("F709").schema();
+        this.f7100 = readerSchema.getField("F710").schema();
+        this.f7110 = readerSchema.getField("F711").schema();
+        this.f7120 = readerSchema.getField("F712").schema();
+        this.f7130 = readerSchema.getField("F713").schema();
+        this.f7140 = readerSchema.getField("F714").schema();
+        this.f7150 = readerSchema.getField("F715").schema();
+        this.f7160 = readerSchema.getField("F716").schema();
+        this.f7170 = readerSchema.getField("F717").schema();
+        this.f7180 = readerSchema.getField("F718").schema();
+        this.f7190 = readerSchema.getField("F719").schema();
+        this.f7200 = readerSchema.getField("F720").schema();
+        this.f7210 = readerSchema.getField("F721").schema();
+        this.f7220 = readerSchema.getField("F722").schema();
+        this.f7230 = readerSchema.getField("F723").schema();
+        this.f7240 = readerSchema.getField("F724").schema();
+        this.f7250 = readerSchema.getField("F725").schema();
+        this.f7260 = readerSchema.getField("F726").schema();
+        this.f7270 = readerSchema.getField("F727").schema();
+        this.f7280 = readerSchema.getField("F728").schema();
+        this.f7290 = readerSchema.getField("F729").schema();
+        this.f7300 = readerSchema.getField("F730").schema();
+        this.f7310 = readerSchema.getField("F731").schema();
+        this.f7320 = readerSchema.getField("F732").schema();
+        this.f7330 = readerSchema.getField("F733").schema();
+        this.f7340 = readerSchema.getField("F734").schema();
+        this.f7350 = readerSchema.getField("F735").schema();
+        this.f7360 = readerSchema.getField("F736").schema();
+        this.f7370 = readerSchema.getField("F737").schema();
+        this.f7380 = readerSchema.getField("F738").schema();
+        this.f7390 = readerSchema.getField("F739").schema();
+        this.f7400 = readerSchema.getField("F740").schema();
+        this.f7410 = readerSchema.getField("F741").schema();
+        this.f7420 = readerSchema.getField("F742").schema();
+        this.f7430 = readerSchema.getField("F743").schema();
+        this.f7440 = readerSchema.getField("F744").schema();
+        this.f7450 = readerSchema.getField("F745").schema();
+        this.f7460 = readerSchema.getField("F746").schema();
+        this.f7470 = readerSchema.getField("F747").schema();
+        this.f7480 = readerSchema.getField("F748").schema();
+        this.f7490 = readerSchema.getField("F749").schema();
+        this.f7500 = readerSchema.getField("F750").schema();
+        this.f7510 = readerSchema.getField("F751").schema();
+        this.f7520 = readerSchema.getField("F752").schema();
+        this.f7530 = readerSchema.getField("F753").schema();
+        this.f7540 = readerSchema.getField("F754").schema();
+        this.f7550 = readerSchema.getField("F755").schema();
+        this.f7560 = readerSchema.getField("F756").schema();
+        this.f7570 = readerSchema.getField("F757").schema();
+        this.f7580 = readerSchema.getField("F758").schema();
+        this.f7590 = readerSchema.getField("F759").schema();
+        this.f7600 = readerSchema.getField("F760").schema();
+        this.f7610 = readerSchema.getField("F761").schema();
+        this.f7620 = readerSchema.getField("F762").schema();
+        this.f7630 = readerSchema.getField("F763").schema();
+        this.f7640 = readerSchema.getField("F764").schema();
+        this.f7650 = readerSchema.getField("F765").schema();
+        this.f7660 = readerSchema.getField("F766").schema();
+        this.f7670 = readerSchema.getField("F767").schema();
+        this.f7680 = readerSchema.getField("F768").schema();
+        this.f7690 = readerSchema.getField("F769").schema();
+        this.f7700 = readerSchema.getField("F770").schema();
+        this.f7710 = readerSchema.getField("F771").schema();
+        this.f7720 = readerSchema.getField("F772").schema();
+        this.f7730 = readerSchema.getField("F773").schema();
+        this.f7740 = readerSchema.getField("F774").schema();
+        this.f7750 = readerSchema.getField("F775").schema();
+        this.f7760 = readerSchema.getField("F776").schema();
+        this.f7770 = readerSchema.getField("F777").schema();
+        this.f7780 = readerSchema.getField("F778").schema();
+        this.f7790 = readerSchema.getField("F779").schema();
+        this.f7800 = readerSchema.getField("F780").schema();
+        this.f7810 = readerSchema.getField("F781").schema();
+        this.f7820 = readerSchema.getField("F782").schema();
+        this.f7830 = readerSchema.getField("F783").schema();
+        this.f7840 = readerSchema.getField("F784").schema();
+        this.f7850 = readerSchema.getField("F785").schema();
+        this.f7860 = readerSchema.getField("F786").schema();
+        this.f7870 = readerSchema.getField("F787").schema();
+        this.f7880 = readerSchema.getField("F788").schema();
+        this.f7890 = readerSchema.getField("F789").schema();
+        this.f7900 = readerSchema.getField("F790").schema();
+        this.f7910 = readerSchema.getField("F791").schema();
+        this.f7920 = readerSchema.getField("F792").schema();
+        this.f7930 = readerSchema.getField("F793").schema();
+        this.f7940 = readerSchema.getField("F794").schema();
+        this.f7950 = readerSchema.getField("F795").schema();
+        this.f7960 = readerSchema.getField("F796").schema();
+        this.f7970 = readerSchema.getField("F797").schema();
+        this.f7980 = readerSchema.getField("F798").schema();
+        this.f7990 = readerSchema.getField("F799").schema();
+        this.f8000 = readerSchema.getField("F800").schema();
+        this.f8010 = readerSchema.getField("F801").schema();
+        this.f8020 = readerSchema.getField("F802").schema();
+        this.f8030 = readerSchema.getField("F803").schema();
+        this.f8040 = readerSchema.getField("F804").schema();
+        this.f8050 = readerSchema.getField("F805").schema();
+        this.f8060 = readerSchema.getField("F806").schema();
+        this.f8070 = readerSchema.getField("F807").schema();
+        this.f8080 = readerSchema.getField("F808").schema();
+        this.f8090 = readerSchema.getField("F809").schema();
+        this.f8100 = readerSchema.getField("F810").schema();
+        this.f8110 = readerSchema.getField("F811").schema();
+        this.f8120 = readerSchema.getField("F812").schema();
+        this.f8130 = readerSchema.getField("F813").schema();
+        this.f8140 = readerSchema.getField("F814").schema();
+        this.f8150 = readerSchema.getField("F815").schema();
+        this.f8160 = readerSchema.getField("F816").schema();
+        this.f8170 = readerSchema.getField("F817").schema();
+        this.f8180 = readerSchema.getField("F818").schema();
+        this.f8190 = readerSchema.getField("F819").schema();
+        this.f8200 = readerSchema.getField("F820").schema();
+        this.f8210 = readerSchema.getField("F821").schema();
+        this.f8220 = readerSchema.getField("F822").schema();
+        this.f8230 = readerSchema.getField("F823").schema();
+        this.f8240 = readerSchema.getField("F824").schema();
+        this.f8250 = readerSchema.getField("F825").schema();
+        this.f8260 = readerSchema.getField("F826").schema();
+        this.f8270 = readerSchema.getField("F827").schema();
+        this.f8280 = readerSchema.getField("F828").schema();
+        this.f8290 = readerSchema.getField("F829").schema();
+        this.f8300 = readerSchema.getField("F830").schema();
+        this.f8310 = readerSchema.getField("F831").schema();
+        this.f8320 = readerSchema.getField("F832").schema();
+        this.f8330 = readerSchema.getField("F833").schema();
+        this.f8340 = readerSchema.getField("F834").schema();
+        this.f8350 = readerSchema.getField("F835").schema();
+        this.f8360 = readerSchema.getField("F836").schema();
+        this.f8370 = readerSchema.getField("F837").schema();
+        this.f8380 = readerSchema.getField("F838").schema();
+        this.f8390 = readerSchema.getField("F839").schema();
+        this.f8400 = readerSchema.getField("F840").schema();
+        this.f8410 = readerSchema.getField("F841").schema();
+        this.f8420 = readerSchema.getField("F842").schema();
+        this.f8430 = readerSchema.getField("F843").schema();
+        this.f8440 = readerSchema.getField("F844").schema();
+        this.f8450 = readerSchema.getField("F845").schema();
+        this.f8460 = readerSchema.getField("F846").schema();
+        this.f8470 = readerSchema.getField("F847").schema();
+        this.f8480 = readerSchema.getField("F848").schema();
+        this.f8490 = readerSchema.getField("F849").schema();
+        this.f8500 = readerSchema.getField("F850").schema();
+        this.f8510 = readerSchema.getField("F851").schema();
+        this.f8520 = readerSchema.getField("F852").schema();
+        this.f8530 = readerSchema.getField("F853").schema();
+        this.f8540 = readerSchema.getField("F854").schema();
+        this.f8550 = readerSchema.getField("F855").schema();
+        this.f8560 = readerSchema.getField("F856").schema();
+        this.f8570 = readerSchema.getField("F857").schema();
+        this.f8580 = readerSchema.getField("F858").schema();
+        this.f8590 = readerSchema.getField("F859").schema();
+        this.f8600 = readerSchema.getField("F860").schema();
+        this.f8610 = readerSchema.getField("F861").schema();
+        this.f8620 = readerSchema.getField("F862").schema();
+        this.f8630 = readerSchema.getField("F863").schema();
+        this.f8640 = readerSchema.getField("F864").schema();
+        this.f8650 = readerSchema.getField("F865").schema();
+        this.f8660 = readerSchema.getField("F866").schema();
+        this.f8670 = readerSchema.getField("F867").schema();
+        this.f8680 = readerSchema.getField("F868").schema();
+        this.f8690 = readerSchema.getField("F869").schema();
+        this.f8700 = readerSchema.getField("F870").schema();
+        this.f8710 = readerSchema.getField("F871").schema();
+        this.f8720 = readerSchema.getField("F872").schema();
+        this.f8730 = readerSchema.getField("F873").schema();
+        this.f8740 = readerSchema.getField("F874").schema();
+        this.f8750 = readerSchema.getField("F875").schema();
+        this.f8760 = readerSchema.getField("F876").schema();
+        this.f8770 = readerSchema.getField("F877").schema();
+        this.f8780 = readerSchema.getField("F878").schema();
+        this.f8790 = readerSchema.getField("F879").schema();
+        this.f8800 = readerSchema.getField("F880").schema();
+        this.f8810 = readerSchema.getField("F881").schema();
+        this.f8820 = readerSchema.getField("F882").schema();
+        this.f8830 = readerSchema.getField("F883").schema();
+        this.f8840 = readerSchema.getField("F884").schema();
+        this.f8850 = readerSchema.getField("F885").schema();
+        this.f8860 = readerSchema.getField("F886").schema();
+        this.f8870 = readerSchema.getField("F887").schema();
+        this.f8880 = readerSchema.getField("F888").schema();
+        this.f8890 = readerSchema.getField("F889").schema();
+        this.f8900 = readerSchema.getField("F890").schema();
+        this.f8910 = readerSchema.getField("F891").schema();
+        this.f8920 = readerSchema.getField("F892").schema();
+        this.f8930 = readerSchema.getField("F893").schema();
+        this.f8940 = readerSchema.getField("F894").schema();
+        this.f8950 = readerSchema.getField("F895").schema();
+        this.f8960 = readerSchema.getField("F896").schema();
+        this.f8970 = readerSchema.getField("F897").schema();
+        this.f8980 = readerSchema.getField("F898").schema();
+        this.f8990 = readerSchema.getField("F899").schema();
+        this.f9000 = readerSchema.getField("F900").schema();
+        this.f9010 = readerSchema.getField("F901").schema();
+        this.f9020 = readerSchema.getField("F902").schema();
+        this.f9030 = readerSchema.getField("F903").schema();
+        this.f9040 = readerSchema.getField("F904").schema();
+        this.f9050 = readerSchema.getField("F905").schema();
+        this.f9060 = readerSchema.getField("F906").schema();
+        this.f9070 = readerSchema.getField("F907").schema();
+        this.f9080 = readerSchema.getField("F908").schema();
+        this.f9090 = readerSchema.getField("F909").schema();
+        this.f9100 = readerSchema.getField("F910").schema();
+        this.f9110 = readerSchema.getField("F911").schema();
+        this.f9120 = readerSchema.getField("F912").schema();
+        this.f9130 = readerSchema.getField("F913").schema();
+        this.f9140 = readerSchema.getField("F914").schema();
+        this.f9150 = readerSchema.getField("F915").schema();
+        this.f9160 = readerSchema.getField("F916").schema();
+        this.f9170 = readerSchema.getField("F917").schema();
+        this.f9180 = readerSchema.getField("F918").schema();
+        this.f9190 = readerSchema.getField("F919").schema();
+        this.f9200 = readerSchema.getField("F920").schema();
+        this.f9210 = readerSchema.getField("F921").schema();
+        this.f9220 = readerSchema.getField("F922").schema();
+        this.f9230 = readerSchema.getField("F923").schema();
+        this.f9240 = readerSchema.getField("F924").schema();
+        this.f9250 = readerSchema.getField("F925").schema();
+        this.f9260 = readerSchema.getField("F926").schema();
+        this.f9270 = readerSchema.getField("F927").schema();
+        this.f9280 = readerSchema.getField("F928").schema();
+        this.f9290 = readerSchema.getField("F929").schema();
+        this.f9300 = readerSchema.getField("F930").schema();
+        this.f9310 = readerSchema.getField("F931").schema();
+        this.f9320 = readerSchema.getField("F932").schema();
+        this.f9330 = readerSchema.getField("F933").schema();
+        this.f9340 = readerSchema.getField("F934").schema();
+        this.f9350 = readerSchema.getField("F935").schema();
+        this.f9360 = readerSchema.getField("F936").schema();
+        this.f9370 = readerSchema.getField("F937").schema();
+        this.f9380 = readerSchema.getField("F938").schema();
+        this.f9390 = readerSchema.getField("F939").schema();
+        this.f9400 = readerSchema.getField("F940").schema();
+        this.f9410 = readerSchema.getField("F941").schema();
+        this.f9420 = readerSchema.getField("F942").schema();
+        this.f9430 = readerSchema.getField("F943").schema();
+        this.f9440 = readerSchema.getField("F944").schema();
+        this.f9450 = readerSchema.getField("F945").schema();
+        this.f9460 = readerSchema.getField("F946").schema();
+        this.f9470 = readerSchema.getField("F947").schema();
+        this.f9480 = readerSchema.getField("F948").schema();
+        this.f9490 = readerSchema.getField("F949").schema();
+        this.f9500 = readerSchema.getField("F950").schema();
+        this.f9510 = readerSchema.getField("F951").schema();
+        this.f9520 = readerSchema.getField("F952").schema();
+        this.f9530 = readerSchema.getField("F953").schema();
+        this.f9540 = readerSchema.getField("F954").schema();
+        this.f9550 = readerSchema.getField("F955").schema();
+        this.f9560 = readerSchema.getField("F956").schema();
+        this.f9570 = readerSchema.getField("F957").schema();
+        this.f9580 = readerSchema.getField("F958").schema();
+        this.f9590 = readerSchema.getField("F959").schema();
+        this.f9600 = readerSchema.getField("F960").schema();
+        this.f9610 = readerSchema.getField("F961").schema();
+        this.f9620 = readerSchema.getField("F962").schema();
+        this.f9630 = readerSchema.getField("F963").schema();
+        this.f9640 = readerSchema.getField("F964").schema();
+        this.f9650 = readerSchema.getField("F965").schema();
+        this.f9660 = readerSchema.getField("F966").schema();
+        this.f9670 = readerSchema.getField("F967").schema();
+        this.f9680 = readerSchema.getField("F968").schema();
+        this.f9690 = readerSchema.getField("F969").schema();
+        this.f9700 = readerSchema.getField("F970").schema();
+        this.f9710 = readerSchema.getField("F971").schema();
+        this.f9720 = readerSchema.getField("F972").schema();
+        this.f9730 = readerSchema.getField("F973").schema();
+        this.f9740 = readerSchema.getField("F974").schema();
+        this.f9750 = readerSchema.getField("F975").schema();
+        this.f9760 = readerSchema.getField("F976").schema();
+        this.f9770 = readerSchema.getField("F977").schema();
+        this.f9780 = readerSchema.getField("F978").schema();
+        this.f9790 = readerSchema.getField("F979").schema();
+        this.f9800 = readerSchema.getField("F980").schema();
+        this.f9810 = readerSchema.getField("F981").schema();
+        this.f9820 = readerSchema.getField("F982").schema();
+        this.f9830 = readerSchema.getField("F983").schema();
+        this.f9840 = readerSchema.getField("F984").schema();
+        this.f9850 = readerSchema.getField("F985").schema();
+        this.f9860 = readerSchema.getField("F986").schema();
+        this.f9870 = readerSchema.getField("F987").schema();
+        this.f9880 = readerSchema.getField("F988").schema();
+        this.f9890 = readerSchema.getField("F989").schema();
+        this.f9900 = readerSchema.getField("F990").schema();
+        this.f9910 = readerSchema.getField("F991").schema();
+        this.f9920 = readerSchema.getField("F992").schema();
+        this.f9930 = readerSchema.getField("F993").schema();
+        this.f9940 = readerSchema.getField("F994").schema();
+        this.f9950 = readerSchema.getField("F995").schema();
+        this.f9960 = readerSchema.getField("F996").schema();
+        this.f9970 = readerSchema.getField("F997").schema();
+        this.f9980 = readerSchema.getField("F998").schema();
+        this.f9990 = readerSchema.getField("F999").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F0': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F1': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(2);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(3);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F3': "+ unionIndex3));
+            }
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence4;
+                Object oldString4 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(4);
+                if (oldString4 instanceof Utf8) {
+                    charSequence4 = (decoder).readString(((Utf8) oldString4));
+                } else {
+                    charSequence4 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, charSequence4);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F4': "+ unionIndex4));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Utf8 charSequence5;
+                Object oldString5 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(5);
+                if (oldString5 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) oldString5));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, charSequence5);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F5': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence6;
+                Object oldString6 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(6);
+                if (oldString6 instanceof Utf8) {
+                    charSequence6 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence6 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, charSequence6);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F6': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence7;
+                Object oldString7 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(7);
+                if (oldString7 instanceof Utf8) {
+                    charSequence7 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence7 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, charSequence7);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F7': "+ unionIndex7));
+            }
+        }
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, null);
+        } else {
+            if (unionIndex8 == 1) {
+                Utf8 charSequence8;
+                Object oldString8 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(8);
+                if (oldString8 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString8));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, charSequence8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F8': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, null);
+        } else {
+            if (unionIndex9 == 1) {
+                Utf8 charSequence9;
+                Object oldString9 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(9);
+                if (oldString9 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString9));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F9': "+ unionIndex9));
+            }
+        }
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, null);
+        } else {
+            if (unionIndex10 == 1) {
+                Utf8 charSequence10;
+                Object oldString10 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(10);
+                if (oldString10 instanceof Utf8) {
+                    charSequence10 = (decoder).readString(((Utf8) oldString10));
+                } else {
+                    charSequence10 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, charSequence10);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F10': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, null);
+        } else {
+            if (unionIndex11 == 1) {
+                Utf8 charSequence11;
+                Object oldString11 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(11);
+                if (oldString11 instanceof Utf8) {
+                    charSequence11 = (decoder).readString(((Utf8) oldString11));
+                } else {
+                    charSequence11 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, charSequence11);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F11': "+ unionIndex11));
+            }
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence12;
+                Object oldString12 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(12);
+                if (oldString12 instanceof Utf8) {
+                    charSequence12 = (decoder).readString(((Utf8) oldString12));
+                } else {
+                    charSequence12 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, charSequence12);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F12': "+ unionIndex12));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence13;
+                Object oldString13 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(13);
+                if (oldString13 instanceof Utf8) {
+                    charSequence13 = (decoder).readString(((Utf8) oldString13));
+                } else {
+                    charSequence13 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, charSequence13);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F13': "+ unionIndex13));
+            }
+        }
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence14;
+                Object oldString14 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(14);
+                if (oldString14 instanceof Utf8) {
+                    charSequence14 = (decoder).readString(((Utf8) oldString14));
+                } else {
+                    charSequence14 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, charSequence14);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F14': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence15;
+                Object oldString15 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(15);
+                if (oldString15 instanceof Utf8) {
+                    charSequence15 = (decoder).readString(((Utf8) oldString15));
+                } else {
+                    charSequence15 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, charSequence15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F15': "+ unionIndex15));
+            }
+        }
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Utf8 charSequence16;
+                Object oldString16 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(16);
+                if (oldString16 instanceof Utf8) {
+                    charSequence16 = (decoder).readString(((Utf8) oldString16));
+                } else {
+                    charSequence16 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, charSequence16);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F16': "+ unionIndex16));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Utf8 charSequence17;
+                Object oldString17 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(17);
+                if (oldString17 instanceof Utf8) {
+                    charSequence17 = (decoder).readString(((Utf8) oldString17));
+                } else {
+                    charSequence17 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, charSequence17);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F17': "+ unionIndex17));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Utf8 charSequence18;
+                Object oldString18 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(18);
+                if (oldString18 instanceof Utf8) {
+                    charSequence18 = (decoder).readString(((Utf8) oldString18));
+                } else {
+                    charSequence18 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, charSequence18);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F18': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex19 = (decoder.readIndex());
+        if (unionIndex19 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, null);
+        } else {
+            if (unionIndex19 == 1) {
+                Utf8 charSequence19;
+                Object oldString19 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(19);
+                if (oldString19 instanceof Utf8) {
+                    charSequence19 = (decoder).readString(((Utf8) oldString19));
+                } else {
+                    charSequence19 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, charSequence19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F19': "+ unionIndex19));
+            }
+        }
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, null);
+        } else {
+            if (unionIndex20 == 1) {
+                Utf8 charSequence20;
+                Object oldString20 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(20);
+                if (oldString20 instanceof Utf8) {
+                    charSequence20 = (decoder).readString(((Utf8) oldString20));
+                } else {
+                    charSequence20 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, charSequence20);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F20': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, null);
+        } else {
+            if (unionIndex21 == 1) {
+                Utf8 charSequence21;
+                Object oldString21 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(21);
+                if (oldString21 instanceof Utf8) {
+                    charSequence21 = (decoder).readString(((Utf8) oldString21));
+                } else {
+                    charSequence21 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, charSequence21);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F21': "+ unionIndex21));
+            }
+        }
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Utf8 charSequence22;
+                Object oldString22 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(22);
+                if (oldString22 instanceof Utf8) {
+                    charSequence22 = (decoder).readString(((Utf8) oldString22));
+                } else {
+                    charSequence22 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, charSequence22);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F22': "+ unionIndex22));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Utf8 charSequence23;
+                Object oldString23 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(23);
+                if (oldString23 instanceof Utf8) {
+                    charSequence23 = (decoder).readString(((Utf8) oldString23));
+                } else {
+                    charSequence23 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, charSequence23);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F23': "+ unionIndex23));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Utf8 charSequence24;
+                Object oldString24 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(24);
+                if (oldString24 instanceof Utf8) {
+                    charSequence24 = (decoder).readString(((Utf8) oldString24));
+                } else {
+                    charSequence24 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, charSequence24);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F24': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, null);
+        } else {
+            if (unionIndex25 == 1) {
+                Utf8 charSequence25;
+                Object oldString25 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(25);
+                if (oldString25 instanceof Utf8) {
+                    charSequence25 = (decoder).readString(((Utf8) oldString25));
+                } else {
+                    charSequence25 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, charSequence25);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F25': "+ unionIndex25));
+            }
+        }
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, null);
+        } else {
+            if (unionIndex26 == 1) {
+                Utf8 charSequence26;
+                Object oldString26 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(26);
+                if (oldString26 instanceof Utf8) {
+                    charSequence26 = (decoder).readString(((Utf8) oldString26));
+                } else {
+                    charSequence26 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, charSequence26);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F26': "+ unionIndex26));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex27 = (decoder.readIndex());
+        if (unionIndex27 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, null);
+        } else {
+            if (unionIndex27 == 1) {
+                Utf8 charSequence27;
+                Object oldString27 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(27);
+                if (oldString27 instanceof Utf8) {
+                    charSequence27 = (decoder).readString(((Utf8) oldString27));
+                } else {
+                    charSequence27 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, charSequence27);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F27': "+ unionIndex27));
+            }
+        }
+        int unionIndex28 = (decoder.readIndex());
+        if (unionIndex28 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, null);
+        } else {
+            if (unionIndex28 == 1) {
+                Utf8 charSequence28;
+                Object oldString28 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(28);
+                if (oldString28 instanceof Utf8) {
+                    charSequence28 = (decoder).readString(((Utf8) oldString28));
+                } else {
+                    charSequence28 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, charSequence28);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F28': "+ unionIndex28));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex29 = (decoder.readIndex());
+        if (unionIndex29 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, null);
+        } else {
+            if (unionIndex29 == 1) {
+                Utf8 charSequence29;
+                Object oldString29 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(29);
+                if (oldString29 instanceof Utf8) {
+                    charSequence29 = (decoder).readString(((Utf8) oldString29));
+                } else {
+                    charSequence29 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, charSequence29);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F29': "+ unionIndex29));
+            }
+        }
+        int unionIndex30 = (decoder.readIndex());
+        if (unionIndex30 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, null);
+        } else {
+            if (unionIndex30 == 1) {
+                Utf8 charSequence30;
+                Object oldString30 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(30);
+                if (oldString30 instanceof Utf8) {
+                    charSequence30 = (decoder).readString(((Utf8) oldString30));
+                } else {
+                    charSequence30 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, charSequence30);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F30': "+ unionIndex30));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex31 = (decoder.readIndex());
+        if (unionIndex31 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, null);
+        } else {
+            if (unionIndex31 == 1) {
+                Utf8 charSequence31;
+                Object oldString31 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(31);
+                if (oldString31 instanceof Utf8) {
+                    charSequence31 = (decoder).readString(((Utf8) oldString31));
+                } else {
+                    charSequence31 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, charSequence31);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F31': "+ unionIndex31));
+            }
+        }
+        int unionIndex32 = (decoder.readIndex());
+        if (unionIndex32 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, null);
+        } else {
+            if (unionIndex32 == 1) {
+                Utf8 charSequence32;
+                Object oldString32 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(32);
+                if (oldString32 instanceof Utf8) {
+                    charSequence32 = (decoder).readString(((Utf8) oldString32));
+                } else {
+                    charSequence32 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, charSequence32);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F32': "+ unionIndex32));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex33 = (decoder.readIndex());
+        if (unionIndex33 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, null);
+        } else {
+            if (unionIndex33 == 1) {
+                Utf8 charSequence33;
+                Object oldString33 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(33);
+                if (oldString33 instanceof Utf8) {
+                    charSequence33 = (decoder).readString(((Utf8) oldString33));
+                } else {
+                    charSequence33 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, charSequence33);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F33': "+ unionIndex33));
+            }
+        }
+        int unionIndex34 = (decoder.readIndex());
+        if (unionIndex34 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, null);
+        } else {
+            if (unionIndex34 == 1) {
+                Utf8 charSequence34;
+                Object oldString34 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(34);
+                if (oldString34 instanceof Utf8) {
+                    charSequence34 = (decoder).readString(((Utf8) oldString34));
+                } else {
+                    charSequence34 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, charSequence34);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F34': "+ unionIndex34));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex35 = (decoder.readIndex());
+        if (unionIndex35 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, null);
+        } else {
+            if (unionIndex35 == 1) {
+                Utf8 charSequence35;
+                Object oldString35 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(35);
+                if (oldString35 instanceof Utf8) {
+                    charSequence35 = (decoder).readString(((Utf8) oldString35));
+                } else {
+                    charSequence35 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, charSequence35);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F35': "+ unionIndex35));
+            }
+        }
+        int unionIndex36 = (decoder.readIndex());
+        if (unionIndex36 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, null);
+        } else {
+            if (unionIndex36 == 1) {
+                Utf8 charSequence36;
+                Object oldString36 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(36);
+                if (oldString36 instanceof Utf8) {
+                    charSequence36 = (decoder).readString(((Utf8) oldString36));
+                } else {
+                    charSequence36 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, charSequence36);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F36': "+ unionIndex36));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex37 = (decoder.readIndex());
+        if (unionIndex37 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, null);
+        } else {
+            if (unionIndex37 == 1) {
+                Utf8 charSequence37;
+                Object oldString37 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(37);
+                if (oldString37 instanceof Utf8) {
+                    charSequence37 = (decoder).readString(((Utf8) oldString37));
+                } else {
+                    charSequence37 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, charSequence37);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F37': "+ unionIndex37));
+            }
+        }
+        int unionIndex38 = (decoder.readIndex());
+        if (unionIndex38 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, null);
+        } else {
+            if (unionIndex38 == 1) {
+                Utf8 charSequence38;
+                Object oldString38 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(38);
+                if (oldString38 instanceof Utf8) {
+                    charSequence38 = (decoder).readString(((Utf8) oldString38));
+                } else {
+                    charSequence38 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, charSequence38);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F38': "+ unionIndex38));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex39 = (decoder.readIndex());
+        if (unionIndex39 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, null);
+        } else {
+            if (unionIndex39 == 1) {
+                Utf8 charSequence39;
+                Object oldString39 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(39);
+                if (oldString39 instanceof Utf8) {
+                    charSequence39 = (decoder).readString(((Utf8) oldString39));
+                } else {
+                    charSequence39 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, charSequence39);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F39': "+ unionIndex39));
+            }
+        }
+        int unionIndex40 = (decoder.readIndex());
+        if (unionIndex40 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, null);
+        } else {
+            if (unionIndex40 == 1) {
+                Utf8 charSequence40;
+                Object oldString40 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(40);
+                if (oldString40 instanceof Utf8) {
+                    charSequence40 = (decoder).readString(((Utf8) oldString40));
+                } else {
+                    charSequence40 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, charSequence40);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F40': "+ unionIndex40));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex41 = (decoder.readIndex());
+        if (unionIndex41 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, null);
+        } else {
+            if (unionIndex41 == 1) {
+                Utf8 charSequence41;
+                Object oldString41 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(41);
+                if (oldString41 instanceof Utf8) {
+                    charSequence41 = (decoder).readString(((Utf8) oldString41));
+                } else {
+                    charSequence41 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, charSequence41);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F41': "+ unionIndex41));
+            }
+        }
+        int unionIndex42 = (decoder.readIndex());
+        if (unionIndex42 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, null);
+        } else {
+            if (unionIndex42 == 1) {
+                Utf8 charSequence42;
+                Object oldString42 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(42);
+                if (oldString42 instanceof Utf8) {
+                    charSequence42 = (decoder).readString(((Utf8) oldString42));
+                } else {
+                    charSequence42 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, charSequence42);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F42': "+ unionIndex42));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex43 = (decoder.readIndex());
+        if (unionIndex43 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, null);
+        } else {
+            if (unionIndex43 == 1) {
+                Utf8 charSequence43;
+                Object oldString43 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(43);
+                if (oldString43 instanceof Utf8) {
+                    charSequence43 = (decoder).readString(((Utf8) oldString43));
+                } else {
+                    charSequence43 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, charSequence43);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F43': "+ unionIndex43));
+            }
+        }
+        int unionIndex44 = (decoder.readIndex());
+        if (unionIndex44 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, null);
+        } else {
+            if (unionIndex44 == 1) {
+                Utf8 charSequence44;
+                Object oldString44 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(44);
+                if (oldString44 instanceof Utf8) {
+                    charSequence44 = (decoder).readString(((Utf8) oldString44));
+                } else {
+                    charSequence44 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, charSequence44);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F44': "+ unionIndex44));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex45 = (decoder.readIndex());
+        if (unionIndex45 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, null);
+        } else {
+            if (unionIndex45 == 1) {
+                Utf8 charSequence45;
+                Object oldString45 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(45);
+                if (oldString45 instanceof Utf8) {
+                    charSequence45 = (decoder).readString(((Utf8) oldString45));
+                } else {
+                    charSequence45 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, charSequence45);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F45': "+ unionIndex45));
+            }
+        }
+        int unionIndex46 = (decoder.readIndex());
+        if (unionIndex46 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, null);
+        } else {
+            if (unionIndex46 == 1) {
+                Utf8 charSequence46;
+                Object oldString46 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(46);
+                if (oldString46 instanceof Utf8) {
+                    charSequence46 = (decoder).readString(((Utf8) oldString46));
+                } else {
+                    charSequence46 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, charSequence46);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F46': "+ unionIndex46));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex47 = (decoder.readIndex());
+        if (unionIndex47 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, null);
+        } else {
+            if (unionIndex47 == 1) {
+                Utf8 charSequence47;
+                Object oldString47 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(47);
+                if (oldString47 instanceof Utf8) {
+                    charSequence47 = (decoder).readString(((Utf8) oldString47));
+                } else {
+                    charSequence47 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, charSequence47);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F47': "+ unionIndex47));
+            }
+        }
+        int unionIndex48 = (decoder.readIndex());
+        if (unionIndex48 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, null);
+        } else {
+            if (unionIndex48 == 1) {
+                Utf8 charSequence48;
+                Object oldString48 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(48);
+                if (oldString48 instanceof Utf8) {
+                    charSequence48 = (decoder).readString(((Utf8) oldString48));
+                } else {
+                    charSequence48 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, charSequence48);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F48': "+ unionIndex48));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex49 = (decoder.readIndex());
+        if (unionIndex49 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, null);
+        } else {
+            if (unionIndex49 == 1) {
+                Utf8 charSequence49;
+                Object oldString49 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(49);
+                if (oldString49 instanceof Utf8) {
+                    charSequence49 = (decoder).readString(((Utf8) oldString49));
+                } else {
+                    charSequence49 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, charSequence49);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F49': "+ unionIndex49));
+            }
+        }
+        int unionIndex50 = (decoder.readIndex());
+        if (unionIndex50 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, null);
+        } else {
+            if (unionIndex50 == 1) {
+                Utf8 charSequence50;
+                Object oldString50 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(50);
+                if (oldString50 instanceof Utf8) {
+                    charSequence50 = (decoder).readString(((Utf8) oldString50));
+                } else {
+                    charSequence50 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, charSequence50);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F50': "+ unionIndex50));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex51 = (decoder.readIndex());
+        if (unionIndex51 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, null);
+        } else {
+            if (unionIndex51 == 1) {
+                Utf8 charSequence51;
+                Object oldString51 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(51);
+                if (oldString51 instanceof Utf8) {
+                    charSequence51 = (decoder).readString(((Utf8) oldString51));
+                } else {
+                    charSequence51 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, charSequence51);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F51': "+ unionIndex51));
+            }
+        }
+        int unionIndex52 = (decoder.readIndex());
+        if (unionIndex52 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, null);
+        } else {
+            if (unionIndex52 == 1) {
+                Utf8 charSequence52;
+                Object oldString52 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(52);
+                if (oldString52 instanceof Utf8) {
+                    charSequence52 = (decoder).readString(((Utf8) oldString52));
+                } else {
+                    charSequence52 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, charSequence52);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F52': "+ unionIndex52));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex53 = (decoder.readIndex());
+        if (unionIndex53 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, null);
+        } else {
+            if (unionIndex53 == 1) {
+                Utf8 charSequence53;
+                Object oldString53 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(53);
+                if (oldString53 instanceof Utf8) {
+                    charSequence53 = (decoder).readString(((Utf8) oldString53));
+                } else {
+                    charSequence53 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, charSequence53);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F53': "+ unionIndex53));
+            }
+        }
+        int unionIndex54 = (decoder.readIndex());
+        if (unionIndex54 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, null);
+        } else {
+            if (unionIndex54 == 1) {
+                Utf8 charSequence54;
+                Object oldString54 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(54);
+                if (oldString54 instanceof Utf8) {
+                    charSequence54 = (decoder).readString(((Utf8) oldString54));
+                } else {
+                    charSequence54 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, charSequence54);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F54': "+ unionIndex54));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex55 = (decoder.readIndex());
+        if (unionIndex55 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, null);
+        } else {
+            if (unionIndex55 == 1) {
+                Utf8 charSequence55;
+                Object oldString55 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(55);
+                if (oldString55 instanceof Utf8) {
+                    charSequence55 = (decoder).readString(((Utf8) oldString55));
+                } else {
+                    charSequence55 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, charSequence55);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F55': "+ unionIndex55));
+            }
+        }
+        int unionIndex56 = (decoder.readIndex());
+        if (unionIndex56 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, null);
+        } else {
+            if (unionIndex56 == 1) {
+                Utf8 charSequence56;
+                Object oldString56 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(56);
+                if (oldString56 instanceof Utf8) {
+                    charSequence56 = (decoder).readString(((Utf8) oldString56));
+                } else {
+                    charSequence56 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, charSequence56);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F56': "+ unionIndex56));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex57 = (decoder.readIndex());
+        if (unionIndex57 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, null);
+        } else {
+            if (unionIndex57 == 1) {
+                Utf8 charSequence57;
+                Object oldString57 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(57);
+                if (oldString57 instanceof Utf8) {
+                    charSequence57 = (decoder).readString(((Utf8) oldString57));
+                } else {
+                    charSequence57 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, charSequence57);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F57': "+ unionIndex57));
+            }
+        }
+        int unionIndex58 = (decoder.readIndex());
+        if (unionIndex58 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, null);
+        } else {
+            if (unionIndex58 == 1) {
+                Utf8 charSequence58;
+                Object oldString58 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(58);
+                if (oldString58 instanceof Utf8) {
+                    charSequence58 = (decoder).readString(((Utf8) oldString58));
+                } else {
+                    charSequence58 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, charSequence58);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F58': "+ unionIndex58));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex59 = (decoder.readIndex());
+        if (unionIndex59 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, null);
+        } else {
+            if (unionIndex59 == 1) {
+                Utf8 charSequence59;
+                Object oldString59 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(59);
+                if (oldString59 instanceof Utf8) {
+                    charSequence59 = (decoder).readString(((Utf8) oldString59));
+                } else {
+                    charSequence59 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, charSequence59);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F59': "+ unionIndex59));
+            }
+        }
+        int unionIndex60 = (decoder.readIndex());
+        if (unionIndex60 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, null);
+        } else {
+            if (unionIndex60 == 1) {
+                Utf8 charSequence60;
+                Object oldString60 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(60);
+                if (oldString60 instanceof Utf8) {
+                    charSequence60 = (decoder).readString(((Utf8) oldString60));
+                } else {
+                    charSequence60 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, charSequence60);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F60': "+ unionIndex60));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex61 = (decoder.readIndex());
+        if (unionIndex61 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, null);
+        } else {
+            if (unionIndex61 == 1) {
+                Utf8 charSequence61;
+                Object oldString61 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(61);
+                if (oldString61 instanceof Utf8) {
+                    charSequence61 = (decoder).readString(((Utf8) oldString61));
+                } else {
+                    charSequence61 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, charSequence61);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F61': "+ unionIndex61));
+            }
+        }
+        int unionIndex62 = (decoder.readIndex());
+        if (unionIndex62 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, null);
+        } else {
+            if (unionIndex62 == 1) {
+                Utf8 charSequence62;
+                Object oldString62 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(62);
+                if (oldString62 instanceof Utf8) {
+                    charSequence62 = (decoder).readString(((Utf8) oldString62));
+                } else {
+                    charSequence62 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, charSequence62);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F62': "+ unionIndex62));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex63 = (decoder.readIndex());
+        if (unionIndex63 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, null);
+        } else {
+            if (unionIndex63 == 1) {
+                Utf8 charSequence63;
+                Object oldString63 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(63);
+                if (oldString63 instanceof Utf8) {
+                    charSequence63 = (decoder).readString(((Utf8) oldString63));
+                } else {
+                    charSequence63 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, charSequence63);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F63': "+ unionIndex63));
+            }
+        }
+        int unionIndex64 = (decoder.readIndex());
+        if (unionIndex64 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, null);
+        } else {
+            if (unionIndex64 == 1) {
+                Utf8 charSequence64;
+                Object oldString64 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(64);
+                if (oldString64 instanceof Utf8) {
+                    charSequence64 = (decoder).readString(((Utf8) oldString64));
+                } else {
+                    charSequence64 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, charSequence64);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F64': "+ unionIndex64));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex65 = (decoder.readIndex());
+        if (unionIndex65 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, null);
+        } else {
+            if (unionIndex65 == 1) {
+                Utf8 charSequence65;
+                Object oldString65 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(65);
+                if (oldString65 instanceof Utf8) {
+                    charSequence65 = (decoder).readString(((Utf8) oldString65));
+                } else {
+                    charSequence65 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, charSequence65);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F65': "+ unionIndex65));
+            }
+        }
+        int unionIndex66 = (decoder.readIndex());
+        if (unionIndex66 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, null);
+        } else {
+            if (unionIndex66 == 1) {
+                Utf8 charSequence66;
+                Object oldString66 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(66);
+                if (oldString66 instanceof Utf8) {
+                    charSequence66 = (decoder).readString(((Utf8) oldString66));
+                } else {
+                    charSequence66 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, charSequence66);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F66': "+ unionIndex66));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex67 = (decoder.readIndex());
+        if (unionIndex67 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, null);
+        } else {
+            if (unionIndex67 == 1) {
+                Utf8 charSequence67;
+                Object oldString67 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(67);
+                if (oldString67 instanceof Utf8) {
+                    charSequence67 = (decoder).readString(((Utf8) oldString67));
+                } else {
+                    charSequence67 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, charSequence67);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F67': "+ unionIndex67));
+            }
+        }
+        int unionIndex68 = (decoder.readIndex());
+        if (unionIndex68 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, null);
+        } else {
+            if (unionIndex68 == 1) {
+                Utf8 charSequence68;
+                Object oldString68 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(68);
+                if (oldString68 instanceof Utf8) {
+                    charSequence68 = (decoder).readString(((Utf8) oldString68));
+                } else {
+                    charSequence68 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, charSequence68);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F68': "+ unionIndex68));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex69 = (decoder.readIndex());
+        if (unionIndex69 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, null);
+        } else {
+            if (unionIndex69 == 1) {
+                Utf8 charSequence69;
+                Object oldString69 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(69);
+                if (oldString69 instanceof Utf8) {
+                    charSequence69 = (decoder).readString(((Utf8) oldString69));
+                } else {
+                    charSequence69 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, charSequence69);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F69': "+ unionIndex69));
+            }
+        }
+        int unionIndex70 = (decoder.readIndex());
+        if (unionIndex70 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, null);
+        } else {
+            if (unionIndex70 == 1) {
+                Utf8 charSequence70;
+                Object oldString70 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(70);
+                if (oldString70 instanceof Utf8) {
+                    charSequence70 = (decoder).readString(((Utf8) oldString70));
+                } else {
+                    charSequence70 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, charSequence70);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F70': "+ unionIndex70));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex71 = (decoder.readIndex());
+        if (unionIndex71 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, null);
+        } else {
+            if (unionIndex71 == 1) {
+                Utf8 charSequence71;
+                Object oldString71 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(71);
+                if (oldString71 instanceof Utf8) {
+                    charSequence71 = (decoder).readString(((Utf8) oldString71));
+                } else {
+                    charSequence71 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, charSequence71);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F71': "+ unionIndex71));
+            }
+        }
+        int unionIndex72 = (decoder.readIndex());
+        if (unionIndex72 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, null);
+        } else {
+            if (unionIndex72 == 1) {
+                Utf8 charSequence72;
+                Object oldString72 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(72);
+                if (oldString72 instanceof Utf8) {
+                    charSequence72 = (decoder).readString(((Utf8) oldString72));
+                } else {
+                    charSequence72 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, charSequence72);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F72': "+ unionIndex72));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex73 = (decoder.readIndex());
+        if (unionIndex73 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, null);
+        } else {
+            if (unionIndex73 == 1) {
+                Utf8 charSequence73;
+                Object oldString73 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(73);
+                if (oldString73 instanceof Utf8) {
+                    charSequence73 = (decoder).readString(((Utf8) oldString73));
+                } else {
+                    charSequence73 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, charSequence73);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F73': "+ unionIndex73));
+            }
+        }
+        int unionIndex74 = (decoder.readIndex());
+        if (unionIndex74 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, null);
+        } else {
+            if (unionIndex74 == 1) {
+                Utf8 charSequence74;
+                Object oldString74 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(74);
+                if (oldString74 instanceof Utf8) {
+                    charSequence74 = (decoder).readString(((Utf8) oldString74));
+                } else {
+                    charSequence74 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, charSequence74);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F74': "+ unionIndex74));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex75 = (decoder.readIndex());
+        if (unionIndex75 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, null);
+        } else {
+            if (unionIndex75 == 1) {
+                Utf8 charSequence75;
+                Object oldString75 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(75);
+                if (oldString75 instanceof Utf8) {
+                    charSequence75 = (decoder).readString(((Utf8) oldString75));
+                } else {
+                    charSequence75 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, charSequence75);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F75': "+ unionIndex75));
+            }
+        }
+        int unionIndex76 = (decoder.readIndex());
+        if (unionIndex76 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, null);
+        } else {
+            if (unionIndex76 == 1) {
+                Utf8 charSequence76;
+                Object oldString76 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(76);
+                if (oldString76 instanceof Utf8) {
+                    charSequence76 = (decoder).readString(((Utf8) oldString76));
+                } else {
+                    charSequence76 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, charSequence76);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F76': "+ unionIndex76));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex77 = (decoder.readIndex());
+        if (unionIndex77 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, null);
+        } else {
+            if (unionIndex77 == 1) {
+                Utf8 charSequence77;
+                Object oldString77 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(77);
+                if (oldString77 instanceof Utf8) {
+                    charSequence77 = (decoder).readString(((Utf8) oldString77));
+                } else {
+                    charSequence77 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, charSequence77);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F77': "+ unionIndex77));
+            }
+        }
+        int unionIndex78 = (decoder.readIndex());
+        if (unionIndex78 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, null);
+        } else {
+            if (unionIndex78 == 1) {
+                Utf8 charSequence78;
+                Object oldString78 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(78);
+                if (oldString78 instanceof Utf8) {
+                    charSequence78 = (decoder).readString(((Utf8) oldString78));
+                } else {
+                    charSequence78 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, charSequence78);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F78': "+ unionIndex78));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex79 = (decoder.readIndex());
+        if (unionIndex79 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, null);
+        } else {
+            if (unionIndex79 == 1) {
+                Utf8 charSequence79;
+                Object oldString79 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(79);
+                if (oldString79 instanceof Utf8) {
+                    charSequence79 = (decoder).readString(((Utf8) oldString79));
+                } else {
+                    charSequence79 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, charSequence79);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F79': "+ unionIndex79));
+            }
+        }
+        int unionIndex80 = (decoder.readIndex());
+        if (unionIndex80 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, null);
+        } else {
+            if (unionIndex80 == 1) {
+                Utf8 charSequence80;
+                Object oldString80 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(80);
+                if (oldString80 instanceof Utf8) {
+                    charSequence80 = (decoder).readString(((Utf8) oldString80));
+                } else {
+                    charSequence80 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, charSequence80);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F80': "+ unionIndex80));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex81 = (decoder.readIndex());
+        if (unionIndex81 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, null);
+        } else {
+            if (unionIndex81 == 1) {
+                Utf8 charSequence81;
+                Object oldString81 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(81);
+                if (oldString81 instanceof Utf8) {
+                    charSequence81 = (decoder).readString(((Utf8) oldString81));
+                } else {
+                    charSequence81 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, charSequence81);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F81': "+ unionIndex81));
+            }
+        }
+        int unionIndex82 = (decoder.readIndex());
+        if (unionIndex82 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, null);
+        } else {
+            if (unionIndex82 == 1) {
+                Utf8 charSequence82;
+                Object oldString82 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(82);
+                if (oldString82 instanceof Utf8) {
+                    charSequence82 = (decoder).readString(((Utf8) oldString82));
+                } else {
+                    charSequence82 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, charSequence82);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F82': "+ unionIndex82));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex83 = (decoder.readIndex());
+        if (unionIndex83 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, null);
+        } else {
+            if (unionIndex83 == 1) {
+                Utf8 charSequence83;
+                Object oldString83 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(83);
+                if (oldString83 instanceof Utf8) {
+                    charSequence83 = (decoder).readString(((Utf8) oldString83));
+                } else {
+                    charSequence83 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, charSequence83);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F83': "+ unionIndex83));
+            }
+        }
+        int unionIndex84 = (decoder.readIndex());
+        if (unionIndex84 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, null);
+        } else {
+            if (unionIndex84 == 1) {
+                Utf8 charSequence84;
+                Object oldString84 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(84);
+                if (oldString84 instanceof Utf8) {
+                    charSequence84 = (decoder).readString(((Utf8) oldString84));
+                } else {
+                    charSequence84 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, charSequence84);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F84': "+ unionIndex84));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex85 = (decoder.readIndex());
+        if (unionIndex85 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, null);
+        } else {
+            if (unionIndex85 == 1) {
+                Utf8 charSequence85;
+                Object oldString85 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(85);
+                if (oldString85 instanceof Utf8) {
+                    charSequence85 = (decoder).readString(((Utf8) oldString85));
+                } else {
+                    charSequence85 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, charSequence85);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F85': "+ unionIndex85));
+            }
+        }
+        int unionIndex86 = (decoder.readIndex());
+        if (unionIndex86 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, null);
+        } else {
+            if (unionIndex86 == 1) {
+                Utf8 charSequence86;
+                Object oldString86 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(86);
+                if (oldString86 instanceof Utf8) {
+                    charSequence86 = (decoder).readString(((Utf8) oldString86));
+                } else {
+                    charSequence86 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, charSequence86);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F86': "+ unionIndex86));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex87 = (decoder.readIndex());
+        if (unionIndex87 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, null);
+        } else {
+            if (unionIndex87 == 1) {
+                Utf8 charSequence87;
+                Object oldString87 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(87);
+                if (oldString87 instanceof Utf8) {
+                    charSequence87 = (decoder).readString(((Utf8) oldString87));
+                } else {
+                    charSequence87 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, charSequence87);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F87': "+ unionIndex87));
+            }
+        }
+        int unionIndex88 = (decoder.readIndex());
+        if (unionIndex88 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, null);
+        } else {
+            if (unionIndex88 == 1) {
+                Utf8 charSequence88;
+                Object oldString88 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(88);
+                if (oldString88 instanceof Utf8) {
+                    charSequence88 = (decoder).readString(((Utf8) oldString88));
+                } else {
+                    charSequence88 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, charSequence88);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F88': "+ unionIndex88));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex89 = (decoder.readIndex());
+        if (unionIndex89 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, null);
+        } else {
+            if (unionIndex89 == 1) {
+                Utf8 charSequence89;
+                Object oldString89 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(89);
+                if (oldString89 instanceof Utf8) {
+                    charSequence89 = (decoder).readString(((Utf8) oldString89));
+                } else {
+                    charSequence89 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, charSequence89);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F89': "+ unionIndex89));
+            }
+        }
+        int unionIndex90 = (decoder.readIndex());
+        if (unionIndex90 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, null);
+        } else {
+            if (unionIndex90 == 1) {
+                Utf8 charSequence90;
+                Object oldString90 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(90);
+                if (oldString90 instanceof Utf8) {
+                    charSequence90 = (decoder).readString(((Utf8) oldString90));
+                } else {
+                    charSequence90 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, charSequence90);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F90': "+ unionIndex90));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex91 = (decoder.readIndex());
+        if (unionIndex91 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, null);
+        } else {
+            if (unionIndex91 == 1) {
+                Utf8 charSequence91;
+                Object oldString91 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(91);
+                if (oldString91 instanceof Utf8) {
+                    charSequence91 = (decoder).readString(((Utf8) oldString91));
+                } else {
+                    charSequence91 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, charSequence91);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F91': "+ unionIndex91));
+            }
+        }
+        int unionIndex92 = (decoder.readIndex());
+        if (unionIndex92 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, null);
+        } else {
+            if (unionIndex92 == 1) {
+                Utf8 charSequence92;
+                Object oldString92 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(92);
+                if (oldString92 instanceof Utf8) {
+                    charSequence92 = (decoder).readString(((Utf8) oldString92));
+                } else {
+                    charSequence92 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, charSequence92);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F92': "+ unionIndex92));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex93 = (decoder.readIndex());
+        if (unionIndex93 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, null);
+        } else {
+            if (unionIndex93 == 1) {
+                Utf8 charSequence93;
+                Object oldString93 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(93);
+                if (oldString93 instanceof Utf8) {
+                    charSequence93 = (decoder).readString(((Utf8) oldString93));
+                } else {
+                    charSequence93 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, charSequence93);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F93': "+ unionIndex93));
+            }
+        }
+        int unionIndex94 = (decoder.readIndex());
+        if (unionIndex94 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, null);
+        } else {
+            if (unionIndex94 == 1) {
+                Utf8 charSequence94;
+                Object oldString94 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(94);
+                if (oldString94 instanceof Utf8) {
+                    charSequence94 = (decoder).readString(((Utf8) oldString94));
+                } else {
+                    charSequence94 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, charSequence94);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F94': "+ unionIndex94));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex95 = (decoder.readIndex());
+        if (unionIndex95 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, null);
+        } else {
+            if (unionIndex95 == 1) {
+                Utf8 charSequence95;
+                Object oldString95 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(95);
+                if (oldString95 instanceof Utf8) {
+                    charSequence95 = (decoder).readString(((Utf8) oldString95));
+                } else {
+                    charSequence95 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, charSequence95);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F95': "+ unionIndex95));
+            }
+        }
+        int unionIndex96 = (decoder.readIndex());
+        if (unionIndex96 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, null);
+        } else {
+            if (unionIndex96 == 1) {
+                Utf8 charSequence96;
+                Object oldString96 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(96);
+                if (oldString96 instanceof Utf8) {
+                    charSequence96 = (decoder).readString(((Utf8) oldString96));
+                } else {
+                    charSequence96 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, charSequence96);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F96': "+ unionIndex96));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex97 = (decoder.readIndex());
+        if (unionIndex97 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, null);
+        } else {
+            if (unionIndex97 == 1) {
+                Utf8 charSequence97;
+                Object oldString97 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(97);
+                if (oldString97 instanceof Utf8) {
+                    charSequence97 = (decoder).readString(((Utf8) oldString97));
+                } else {
+                    charSequence97 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, charSequence97);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F97': "+ unionIndex97));
+            }
+        }
+        int unionIndex98 = (decoder.readIndex());
+        if (unionIndex98 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, null);
+        } else {
+            if (unionIndex98 == 1) {
+                Utf8 charSequence98;
+                Object oldString98 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(98);
+                if (oldString98 instanceof Utf8) {
+                    charSequence98 = (decoder).readString(((Utf8) oldString98));
+                } else {
+                    charSequence98 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, charSequence98);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F98': "+ unionIndex98));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex99 = (decoder.readIndex());
+        if (unionIndex99 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, null);
+        } else {
+            if (unionIndex99 == 1) {
+                Utf8 charSequence99;
+                Object oldString99 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(99);
+                if (oldString99 instanceof Utf8) {
+                    charSequence99 = (decoder).readString(((Utf8) oldString99));
+                } else {
+                    charSequence99 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, charSequence99);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F99': "+ unionIndex99));
+            }
+        }
+        int unionIndex100 = (decoder.readIndex());
+        if (unionIndex100 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, null);
+        } else {
+            if (unionIndex100 == 1) {
+                Utf8 charSequence100;
+                Object oldString100 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(100);
+                if (oldString100 instanceof Utf8) {
+                    charSequence100 = (decoder).readString(((Utf8) oldString100));
+                } else {
+                    charSequence100 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, charSequence100);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F100': "+ unionIndex100));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex101 = (decoder.readIndex());
+        if (unionIndex101 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, null);
+        } else {
+            if (unionIndex101 == 1) {
+                Utf8 charSequence101;
+                Object oldString101 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(101);
+                if (oldString101 instanceof Utf8) {
+                    charSequence101 = (decoder).readString(((Utf8) oldString101));
+                } else {
+                    charSequence101 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, charSequence101);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F101': "+ unionIndex101));
+            }
+        }
+        int unionIndex102 = (decoder.readIndex());
+        if (unionIndex102 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, null);
+        } else {
+            if (unionIndex102 == 1) {
+                Utf8 charSequence102;
+                Object oldString102 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(102);
+                if (oldString102 instanceof Utf8) {
+                    charSequence102 = (decoder).readString(((Utf8) oldString102));
+                } else {
+                    charSequence102 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, charSequence102);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F102': "+ unionIndex102));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex103 = (decoder.readIndex());
+        if (unionIndex103 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, null);
+        } else {
+            if (unionIndex103 == 1) {
+                Utf8 charSequence103;
+                Object oldString103 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(103);
+                if (oldString103 instanceof Utf8) {
+                    charSequence103 = (decoder).readString(((Utf8) oldString103));
+                } else {
+                    charSequence103 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, charSequence103);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F103': "+ unionIndex103));
+            }
+        }
+        int unionIndex104 = (decoder.readIndex());
+        if (unionIndex104 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, null);
+        } else {
+            if (unionIndex104 == 1) {
+                Utf8 charSequence104;
+                Object oldString104 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(104);
+                if (oldString104 instanceof Utf8) {
+                    charSequence104 = (decoder).readString(((Utf8) oldString104));
+                } else {
+                    charSequence104 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, charSequence104);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F104': "+ unionIndex104));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex105 = (decoder.readIndex());
+        if (unionIndex105 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, null);
+        } else {
+            if (unionIndex105 == 1) {
+                Utf8 charSequence105;
+                Object oldString105 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(105);
+                if (oldString105 instanceof Utf8) {
+                    charSequence105 = (decoder).readString(((Utf8) oldString105));
+                } else {
+                    charSequence105 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, charSequence105);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F105': "+ unionIndex105));
+            }
+        }
+        int unionIndex106 = (decoder.readIndex());
+        if (unionIndex106 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, null);
+        } else {
+            if (unionIndex106 == 1) {
+                Utf8 charSequence106;
+                Object oldString106 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(106);
+                if (oldString106 instanceof Utf8) {
+                    charSequence106 = (decoder).readString(((Utf8) oldString106));
+                } else {
+                    charSequence106 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, charSequence106);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F106': "+ unionIndex106));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex107 = (decoder.readIndex());
+        if (unionIndex107 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, null);
+        } else {
+            if (unionIndex107 == 1) {
+                Utf8 charSequence107;
+                Object oldString107 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(107);
+                if (oldString107 instanceof Utf8) {
+                    charSequence107 = (decoder).readString(((Utf8) oldString107));
+                } else {
+                    charSequence107 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, charSequence107);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F107': "+ unionIndex107));
+            }
+        }
+        int unionIndex108 = (decoder.readIndex());
+        if (unionIndex108 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, null);
+        } else {
+            if (unionIndex108 == 1) {
+                Utf8 charSequence108;
+                Object oldString108 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(108);
+                if (oldString108 instanceof Utf8) {
+                    charSequence108 = (decoder).readString(((Utf8) oldString108));
+                } else {
+                    charSequence108 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, charSequence108);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F108': "+ unionIndex108));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex109 = (decoder.readIndex());
+        if (unionIndex109 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, null);
+        } else {
+            if (unionIndex109 == 1) {
+                Utf8 charSequence109;
+                Object oldString109 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(109);
+                if (oldString109 instanceof Utf8) {
+                    charSequence109 = (decoder).readString(((Utf8) oldString109));
+                } else {
+                    charSequence109 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, charSequence109);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F109': "+ unionIndex109));
+            }
+        }
+        int unionIndex110 = (decoder.readIndex());
+        if (unionIndex110 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, null);
+        } else {
+            if (unionIndex110 == 1) {
+                Utf8 charSequence110;
+                Object oldString110 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(110);
+                if (oldString110 instanceof Utf8) {
+                    charSequence110 = (decoder).readString(((Utf8) oldString110));
+                } else {
+                    charSequence110 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, charSequence110);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F110': "+ unionIndex110));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex111 = (decoder.readIndex());
+        if (unionIndex111 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, null);
+        } else {
+            if (unionIndex111 == 1) {
+                Utf8 charSequence111;
+                Object oldString111 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(111);
+                if (oldString111 instanceof Utf8) {
+                    charSequence111 = (decoder).readString(((Utf8) oldString111));
+                } else {
+                    charSequence111 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, charSequence111);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F111': "+ unionIndex111));
+            }
+        }
+        int unionIndex112 = (decoder.readIndex());
+        if (unionIndex112 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, null);
+        } else {
+            if (unionIndex112 == 1) {
+                Utf8 charSequence112;
+                Object oldString112 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(112);
+                if (oldString112 instanceof Utf8) {
+                    charSequence112 = (decoder).readString(((Utf8) oldString112));
+                } else {
+                    charSequence112 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, charSequence112);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F112': "+ unionIndex112));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex113 = (decoder.readIndex());
+        if (unionIndex113 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, null);
+        } else {
+            if (unionIndex113 == 1) {
+                Utf8 charSequence113;
+                Object oldString113 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(113);
+                if (oldString113 instanceof Utf8) {
+                    charSequence113 = (decoder).readString(((Utf8) oldString113));
+                } else {
+                    charSequence113 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, charSequence113);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F113': "+ unionIndex113));
+            }
+        }
+        int unionIndex114 = (decoder.readIndex());
+        if (unionIndex114 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, null);
+        } else {
+            if (unionIndex114 == 1) {
+                Utf8 charSequence114;
+                Object oldString114 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(114);
+                if (oldString114 instanceof Utf8) {
+                    charSequence114 = (decoder).readString(((Utf8) oldString114));
+                } else {
+                    charSequence114 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, charSequence114);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F114': "+ unionIndex114));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex115 = (decoder.readIndex());
+        if (unionIndex115 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, null);
+        } else {
+            if (unionIndex115 == 1) {
+                Utf8 charSequence115;
+                Object oldString115 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(115);
+                if (oldString115 instanceof Utf8) {
+                    charSequence115 = (decoder).readString(((Utf8) oldString115));
+                } else {
+                    charSequence115 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, charSequence115);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F115': "+ unionIndex115));
+            }
+        }
+        int unionIndex116 = (decoder.readIndex());
+        if (unionIndex116 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, null);
+        } else {
+            if (unionIndex116 == 1) {
+                Utf8 charSequence116;
+                Object oldString116 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(116);
+                if (oldString116 instanceof Utf8) {
+                    charSequence116 = (decoder).readString(((Utf8) oldString116));
+                } else {
+                    charSequence116 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, charSequence116);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F116': "+ unionIndex116));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex117 = (decoder.readIndex());
+        if (unionIndex117 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, null);
+        } else {
+            if (unionIndex117 == 1) {
+                Utf8 charSequence117;
+                Object oldString117 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(117);
+                if (oldString117 instanceof Utf8) {
+                    charSequence117 = (decoder).readString(((Utf8) oldString117));
+                } else {
+                    charSequence117 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, charSequence117);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F117': "+ unionIndex117));
+            }
+        }
+        int unionIndex118 = (decoder.readIndex());
+        if (unionIndex118 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, null);
+        } else {
+            if (unionIndex118 == 1) {
+                Utf8 charSequence118;
+                Object oldString118 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(118);
+                if (oldString118 instanceof Utf8) {
+                    charSequence118 = (decoder).readString(((Utf8) oldString118));
+                } else {
+                    charSequence118 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, charSequence118);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F118': "+ unionIndex118));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex119 = (decoder.readIndex());
+        if (unionIndex119 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, null);
+        } else {
+            if (unionIndex119 == 1) {
+                Utf8 charSequence119;
+                Object oldString119 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(119);
+                if (oldString119 instanceof Utf8) {
+                    charSequence119 = (decoder).readString(((Utf8) oldString119));
+                } else {
+                    charSequence119 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, charSequence119);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F119': "+ unionIndex119));
+            }
+        }
+        int unionIndex120 = (decoder.readIndex());
+        if (unionIndex120 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, null);
+        } else {
+            if (unionIndex120 == 1) {
+                Utf8 charSequence120;
+                Object oldString120 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(120);
+                if (oldString120 instanceof Utf8) {
+                    charSequence120 = (decoder).readString(((Utf8) oldString120));
+                } else {
+                    charSequence120 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, charSequence120);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F120': "+ unionIndex120));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex121 = (decoder.readIndex());
+        if (unionIndex121 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, null);
+        } else {
+            if (unionIndex121 == 1) {
+                Utf8 charSequence121;
+                Object oldString121 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(121);
+                if (oldString121 instanceof Utf8) {
+                    charSequence121 = (decoder).readString(((Utf8) oldString121));
+                } else {
+                    charSequence121 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, charSequence121);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F121': "+ unionIndex121));
+            }
+        }
+        int unionIndex122 = (decoder.readIndex());
+        if (unionIndex122 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, null);
+        } else {
+            if (unionIndex122 == 1) {
+                Utf8 charSequence122;
+                Object oldString122 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(122);
+                if (oldString122 instanceof Utf8) {
+                    charSequence122 = (decoder).readString(((Utf8) oldString122));
+                } else {
+                    charSequence122 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, charSequence122);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F122': "+ unionIndex122));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex123 = (decoder.readIndex());
+        if (unionIndex123 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, null);
+        } else {
+            if (unionIndex123 == 1) {
+                Utf8 charSequence123;
+                Object oldString123 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(123);
+                if (oldString123 instanceof Utf8) {
+                    charSequence123 = (decoder).readString(((Utf8) oldString123));
+                } else {
+                    charSequence123 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, charSequence123);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F123': "+ unionIndex123));
+            }
+        }
+        int unionIndex124 = (decoder.readIndex());
+        if (unionIndex124 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, null);
+        } else {
+            if (unionIndex124 == 1) {
+                Utf8 charSequence124;
+                Object oldString124 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(124);
+                if (oldString124 instanceof Utf8) {
+                    charSequence124 = (decoder).readString(((Utf8) oldString124));
+                } else {
+                    charSequence124 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, charSequence124);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F124': "+ unionIndex124));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex125 = (decoder.readIndex());
+        if (unionIndex125 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, null);
+        } else {
+            if (unionIndex125 == 1) {
+                Utf8 charSequence125;
+                Object oldString125 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(125);
+                if (oldString125 instanceof Utf8) {
+                    charSequence125 = (decoder).readString(((Utf8) oldString125));
+                } else {
+                    charSequence125 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, charSequence125);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F125': "+ unionIndex125));
+            }
+        }
+        int unionIndex126 = (decoder.readIndex());
+        if (unionIndex126 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, null);
+        } else {
+            if (unionIndex126 == 1) {
+                Utf8 charSequence126;
+                Object oldString126 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(126);
+                if (oldString126 instanceof Utf8) {
+                    charSequence126 = (decoder).readString(((Utf8) oldString126));
+                } else {
+                    charSequence126 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, charSequence126);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F126': "+ unionIndex126));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex127 = (decoder.readIndex());
+        if (unionIndex127 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, null);
+        } else {
+            if (unionIndex127 == 1) {
+                Utf8 charSequence127;
+                Object oldString127 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(127);
+                if (oldString127 instanceof Utf8) {
+                    charSequence127 = (decoder).readString(((Utf8) oldString127));
+                } else {
+                    charSequence127 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, charSequence127);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F127': "+ unionIndex127));
+            }
+        }
+        int unionIndex128 = (decoder.readIndex());
+        if (unionIndex128 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, null);
+        } else {
+            if (unionIndex128 == 1) {
+                Utf8 charSequence128;
+                Object oldString128 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(128);
+                if (oldString128 instanceof Utf8) {
+                    charSequence128 = (decoder).readString(((Utf8) oldString128));
+                } else {
+                    charSequence128 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, charSequence128);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F128': "+ unionIndex128));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex129 = (decoder.readIndex());
+        if (unionIndex129 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, null);
+        } else {
+            if (unionIndex129 == 1) {
+                Utf8 charSequence129;
+                Object oldString129 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(129);
+                if (oldString129 instanceof Utf8) {
+                    charSequence129 = (decoder).readString(((Utf8) oldString129));
+                } else {
+                    charSequence129 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, charSequence129);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F129': "+ unionIndex129));
+            }
+        }
+        int unionIndex130 = (decoder.readIndex());
+        if (unionIndex130 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, null);
+        } else {
+            if (unionIndex130 == 1) {
+                Utf8 charSequence130;
+                Object oldString130 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(130);
+                if (oldString130 instanceof Utf8) {
+                    charSequence130 = (decoder).readString(((Utf8) oldString130));
+                } else {
+                    charSequence130 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, charSequence130);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F130': "+ unionIndex130));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex131 = (decoder.readIndex());
+        if (unionIndex131 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, null);
+        } else {
+            if (unionIndex131 == 1) {
+                Utf8 charSequence131;
+                Object oldString131 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(131);
+                if (oldString131 instanceof Utf8) {
+                    charSequence131 = (decoder).readString(((Utf8) oldString131));
+                } else {
+                    charSequence131 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, charSequence131);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F131': "+ unionIndex131));
+            }
+        }
+        int unionIndex132 = (decoder.readIndex());
+        if (unionIndex132 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, null);
+        } else {
+            if (unionIndex132 == 1) {
+                Utf8 charSequence132;
+                Object oldString132 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(132);
+                if (oldString132 instanceof Utf8) {
+                    charSequence132 = (decoder).readString(((Utf8) oldString132));
+                } else {
+                    charSequence132 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, charSequence132);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F132': "+ unionIndex132));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex133 = (decoder.readIndex());
+        if (unionIndex133 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, null);
+        } else {
+            if (unionIndex133 == 1) {
+                Utf8 charSequence133;
+                Object oldString133 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(133);
+                if (oldString133 instanceof Utf8) {
+                    charSequence133 = (decoder).readString(((Utf8) oldString133));
+                } else {
+                    charSequence133 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, charSequence133);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F133': "+ unionIndex133));
+            }
+        }
+        int unionIndex134 = (decoder.readIndex());
+        if (unionIndex134 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, null);
+        } else {
+            if (unionIndex134 == 1) {
+                Utf8 charSequence134;
+                Object oldString134 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(134);
+                if (oldString134 instanceof Utf8) {
+                    charSequence134 = (decoder).readString(((Utf8) oldString134));
+                } else {
+                    charSequence134 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, charSequence134);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F134': "+ unionIndex134));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex135 = (decoder.readIndex());
+        if (unionIndex135 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, null);
+        } else {
+            if (unionIndex135 == 1) {
+                Utf8 charSequence135;
+                Object oldString135 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(135);
+                if (oldString135 instanceof Utf8) {
+                    charSequence135 = (decoder).readString(((Utf8) oldString135));
+                } else {
+                    charSequence135 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, charSequence135);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F135': "+ unionIndex135));
+            }
+        }
+        int unionIndex136 = (decoder.readIndex());
+        if (unionIndex136 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, null);
+        } else {
+            if (unionIndex136 == 1) {
+                Utf8 charSequence136;
+                Object oldString136 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(136);
+                if (oldString136 instanceof Utf8) {
+                    charSequence136 = (decoder).readString(((Utf8) oldString136));
+                } else {
+                    charSequence136 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, charSequence136);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F136': "+ unionIndex136));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex137 = (decoder.readIndex());
+        if (unionIndex137 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, null);
+        } else {
+            if (unionIndex137 == 1) {
+                Utf8 charSequence137;
+                Object oldString137 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(137);
+                if (oldString137 instanceof Utf8) {
+                    charSequence137 = (decoder).readString(((Utf8) oldString137));
+                } else {
+                    charSequence137 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, charSequence137);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F137': "+ unionIndex137));
+            }
+        }
+        int unionIndex138 = (decoder.readIndex());
+        if (unionIndex138 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, null);
+        } else {
+            if (unionIndex138 == 1) {
+                Utf8 charSequence138;
+                Object oldString138 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(138);
+                if (oldString138 instanceof Utf8) {
+                    charSequence138 = (decoder).readString(((Utf8) oldString138));
+                } else {
+                    charSequence138 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, charSequence138);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F138': "+ unionIndex138));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex139 = (decoder.readIndex());
+        if (unionIndex139 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, null);
+        } else {
+            if (unionIndex139 == 1) {
+                Utf8 charSequence139;
+                Object oldString139 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(139);
+                if (oldString139 instanceof Utf8) {
+                    charSequence139 = (decoder).readString(((Utf8) oldString139));
+                } else {
+                    charSequence139 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, charSequence139);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F139': "+ unionIndex139));
+            }
+        }
+        int unionIndex140 = (decoder.readIndex());
+        if (unionIndex140 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, null);
+        } else {
+            if (unionIndex140 == 1) {
+                Utf8 charSequence140;
+                Object oldString140 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(140);
+                if (oldString140 instanceof Utf8) {
+                    charSequence140 = (decoder).readString(((Utf8) oldString140));
+                } else {
+                    charSequence140 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, charSequence140);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F140': "+ unionIndex140));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex141 = (decoder.readIndex());
+        if (unionIndex141 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, null);
+        } else {
+            if (unionIndex141 == 1) {
+                Utf8 charSequence141;
+                Object oldString141 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(141);
+                if (oldString141 instanceof Utf8) {
+                    charSequence141 = (decoder).readString(((Utf8) oldString141));
+                } else {
+                    charSequence141 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, charSequence141);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F141': "+ unionIndex141));
+            }
+        }
+        int unionIndex142 = (decoder.readIndex());
+        if (unionIndex142 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, null);
+        } else {
+            if (unionIndex142 == 1) {
+                Utf8 charSequence142;
+                Object oldString142 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(142);
+                if (oldString142 instanceof Utf8) {
+                    charSequence142 = (decoder).readString(((Utf8) oldString142));
+                } else {
+                    charSequence142 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, charSequence142);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F142': "+ unionIndex142));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex143 = (decoder.readIndex());
+        if (unionIndex143 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, null);
+        } else {
+            if (unionIndex143 == 1) {
+                Utf8 charSequence143;
+                Object oldString143 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(143);
+                if (oldString143 instanceof Utf8) {
+                    charSequence143 = (decoder).readString(((Utf8) oldString143));
+                } else {
+                    charSequence143 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, charSequence143);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F143': "+ unionIndex143));
+            }
+        }
+        int unionIndex144 = (decoder.readIndex());
+        if (unionIndex144 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, null);
+        } else {
+            if (unionIndex144 == 1) {
+                Utf8 charSequence144;
+                Object oldString144 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(144);
+                if (oldString144 instanceof Utf8) {
+                    charSequence144 = (decoder).readString(((Utf8) oldString144));
+                } else {
+                    charSequence144 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, charSequence144);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F144': "+ unionIndex144));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex145 = (decoder.readIndex());
+        if (unionIndex145 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, null);
+        } else {
+            if (unionIndex145 == 1) {
+                Utf8 charSequence145;
+                Object oldString145 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(145);
+                if (oldString145 instanceof Utf8) {
+                    charSequence145 = (decoder).readString(((Utf8) oldString145));
+                } else {
+                    charSequence145 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, charSequence145);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F145': "+ unionIndex145));
+            }
+        }
+        int unionIndex146 = (decoder.readIndex());
+        if (unionIndex146 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, null);
+        } else {
+            if (unionIndex146 == 1) {
+                Utf8 charSequence146;
+                Object oldString146 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(146);
+                if (oldString146 instanceof Utf8) {
+                    charSequence146 = (decoder).readString(((Utf8) oldString146));
+                } else {
+                    charSequence146 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, charSequence146);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F146': "+ unionIndex146));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex147 = (decoder.readIndex());
+        if (unionIndex147 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, null);
+        } else {
+            if (unionIndex147 == 1) {
+                Utf8 charSequence147;
+                Object oldString147 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(147);
+                if (oldString147 instanceof Utf8) {
+                    charSequence147 = (decoder).readString(((Utf8) oldString147));
+                } else {
+                    charSequence147 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, charSequence147);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F147': "+ unionIndex147));
+            }
+        }
+        int unionIndex148 = (decoder.readIndex());
+        if (unionIndex148 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, null);
+        } else {
+            if (unionIndex148 == 1) {
+                Utf8 charSequence148;
+                Object oldString148 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(148);
+                if (oldString148 instanceof Utf8) {
+                    charSequence148 = (decoder).readString(((Utf8) oldString148));
+                } else {
+                    charSequence148 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, charSequence148);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F148': "+ unionIndex148));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex149 = (decoder.readIndex());
+        if (unionIndex149 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, null);
+        } else {
+            if (unionIndex149 == 1) {
+                Utf8 charSequence149;
+                Object oldString149 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(149);
+                if (oldString149 instanceof Utf8) {
+                    charSequence149 = (decoder).readString(((Utf8) oldString149));
+                } else {
+                    charSequence149 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, charSequence149);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F149': "+ unionIndex149));
+            }
+        }
+        int unionIndex150 = (decoder.readIndex());
+        if (unionIndex150 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, null);
+        } else {
+            if (unionIndex150 == 1) {
+                Utf8 charSequence150;
+                Object oldString150 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(150);
+                if (oldString150 instanceof Utf8) {
+                    charSequence150 = (decoder).readString(((Utf8) oldString150));
+                } else {
+                    charSequence150 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, charSequence150);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F150': "+ unionIndex150));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex151 = (decoder.readIndex());
+        if (unionIndex151 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, null);
+        } else {
+            if (unionIndex151 == 1) {
+                Utf8 charSequence151;
+                Object oldString151 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(151);
+                if (oldString151 instanceof Utf8) {
+                    charSequence151 = (decoder).readString(((Utf8) oldString151));
+                } else {
+                    charSequence151 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, charSequence151);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F151': "+ unionIndex151));
+            }
+        }
+        int unionIndex152 = (decoder.readIndex());
+        if (unionIndex152 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, null);
+        } else {
+            if (unionIndex152 == 1) {
+                Utf8 charSequence152;
+                Object oldString152 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(152);
+                if (oldString152 instanceof Utf8) {
+                    charSequence152 = (decoder).readString(((Utf8) oldString152));
+                } else {
+                    charSequence152 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, charSequence152);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F152': "+ unionIndex152));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex153 = (decoder.readIndex());
+        if (unionIndex153 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, null);
+        } else {
+            if (unionIndex153 == 1) {
+                Utf8 charSequence153;
+                Object oldString153 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(153);
+                if (oldString153 instanceof Utf8) {
+                    charSequence153 = (decoder).readString(((Utf8) oldString153));
+                } else {
+                    charSequence153 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, charSequence153);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F153': "+ unionIndex153));
+            }
+        }
+        int unionIndex154 = (decoder.readIndex());
+        if (unionIndex154 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, null);
+        } else {
+            if (unionIndex154 == 1) {
+                Utf8 charSequence154;
+                Object oldString154 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(154);
+                if (oldString154 instanceof Utf8) {
+                    charSequence154 = (decoder).readString(((Utf8) oldString154));
+                } else {
+                    charSequence154 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, charSequence154);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F154': "+ unionIndex154));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex155 = (decoder.readIndex());
+        if (unionIndex155 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, null);
+        } else {
+            if (unionIndex155 == 1) {
+                Utf8 charSequence155;
+                Object oldString155 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(155);
+                if (oldString155 instanceof Utf8) {
+                    charSequence155 = (decoder).readString(((Utf8) oldString155));
+                } else {
+                    charSequence155 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, charSequence155);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F155': "+ unionIndex155));
+            }
+        }
+        int unionIndex156 = (decoder.readIndex());
+        if (unionIndex156 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, null);
+        } else {
+            if (unionIndex156 == 1) {
+                Utf8 charSequence156;
+                Object oldString156 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(156);
+                if (oldString156 instanceof Utf8) {
+                    charSequence156 = (decoder).readString(((Utf8) oldString156));
+                } else {
+                    charSequence156 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, charSequence156);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F156': "+ unionIndex156));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex157 = (decoder.readIndex());
+        if (unionIndex157 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, null);
+        } else {
+            if (unionIndex157 == 1) {
+                Utf8 charSequence157;
+                Object oldString157 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(157);
+                if (oldString157 instanceof Utf8) {
+                    charSequence157 = (decoder).readString(((Utf8) oldString157));
+                } else {
+                    charSequence157 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, charSequence157);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F157': "+ unionIndex157));
+            }
+        }
+        int unionIndex158 = (decoder.readIndex());
+        if (unionIndex158 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, null);
+        } else {
+            if (unionIndex158 == 1) {
+                Utf8 charSequence158;
+                Object oldString158 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(158);
+                if (oldString158 instanceof Utf8) {
+                    charSequence158 = (decoder).readString(((Utf8) oldString158));
+                } else {
+                    charSequence158 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, charSequence158);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F158': "+ unionIndex158));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex159 = (decoder.readIndex());
+        if (unionIndex159 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, null);
+        } else {
+            if (unionIndex159 == 1) {
+                Utf8 charSequence159;
+                Object oldString159 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(159);
+                if (oldString159 instanceof Utf8) {
+                    charSequence159 = (decoder).readString(((Utf8) oldString159));
+                } else {
+                    charSequence159 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, charSequence159);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F159': "+ unionIndex159));
+            }
+        }
+        int unionIndex160 = (decoder.readIndex());
+        if (unionIndex160 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, null);
+        } else {
+            if (unionIndex160 == 1) {
+                Utf8 charSequence160;
+                Object oldString160 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(160);
+                if (oldString160 instanceof Utf8) {
+                    charSequence160 = (decoder).readString(((Utf8) oldString160));
+                } else {
+                    charSequence160 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, charSequence160);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F160': "+ unionIndex160));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex161 = (decoder.readIndex());
+        if (unionIndex161 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, null);
+        } else {
+            if (unionIndex161 == 1) {
+                Utf8 charSequence161;
+                Object oldString161 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(161);
+                if (oldString161 instanceof Utf8) {
+                    charSequence161 = (decoder).readString(((Utf8) oldString161));
+                } else {
+                    charSequence161 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, charSequence161);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F161': "+ unionIndex161));
+            }
+        }
+        int unionIndex162 = (decoder.readIndex());
+        if (unionIndex162 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, null);
+        } else {
+            if (unionIndex162 == 1) {
+                Utf8 charSequence162;
+                Object oldString162 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(162);
+                if (oldString162 instanceof Utf8) {
+                    charSequence162 = (decoder).readString(((Utf8) oldString162));
+                } else {
+                    charSequence162 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, charSequence162);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F162': "+ unionIndex162));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex163 = (decoder.readIndex());
+        if (unionIndex163 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, null);
+        } else {
+            if (unionIndex163 == 1) {
+                Utf8 charSequence163;
+                Object oldString163 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(163);
+                if (oldString163 instanceof Utf8) {
+                    charSequence163 = (decoder).readString(((Utf8) oldString163));
+                } else {
+                    charSequence163 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, charSequence163);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F163': "+ unionIndex163));
+            }
+        }
+        int unionIndex164 = (decoder.readIndex());
+        if (unionIndex164 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, null);
+        } else {
+            if (unionIndex164 == 1) {
+                Utf8 charSequence164;
+                Object oldString164 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(164);
+                if (oldString164 instanceof Utf8) {
+                    charSequence164 = (decoder).readString(((Utf8) oldString164));
+                } else {
+                    charSequence164 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, charSequence164);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F164': "+ unionIndex164));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex165 = (decoder.readIndex());
+        if (unionIndex165 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, null);
+        } else {
+            if (unionIndex165 == 1) {
+                Utf8 charSequence165;
+                Object oldString165 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(165);
+                if (oldString165 instanceof Utf8) {
+                    charSequence165 = (decoder).readString(((Utf8) oldString165));
+                } else {
+                    charSequence165 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, charSequence165);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F165': "+ unionIndex165));
+            }
+        }
+        int unionIndex166 = (decoder.readIndex());
+        if (unionIndex166 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, null);
+        } else {
+            if (unionIndex166 == 1) {
+                Utf8 charSequence166;
+                Object oldString166 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(166);
+                if (oldString166 instanceof Utf8) {
+                    charSequence166 = (decoder).readString(((Utf8) oldString166));
+                } else {
+                    charSequence166 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, charSequence166);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F166': "+ unionIndex166));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex167 = (decoder.readIndex());
+        if (unionIndex167 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, null);
+        } else {
+            if (unionIndex167 == 1) {
+                Utf8 charSequence167;
+                Object oldString167 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(167);
+                if (oldString167 instanceof Utf8) {
+                    charSequence167 = (decoder).readString(((Utf8) oldString167));
+                } else {
+                    charSequence167 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, charSequence167);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F167': "+ unionIndex167));
+            }
+        }
+        int unionIndex168 = (decoder.readIndex());
+        if (unionIndex168 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, null);
+        } else {
+            if (unionIndex168 == 1) {
+                Utf8 charSequence168;
+                Object oldString168 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(168);
+                if (oldString168 instanceof Utf8) {
+                    charSequence168 = (decoder).readString(((Utf8) oldString168));
+                } else {
+                    charSequence168 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, charSequence168);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F168': "+ unionIndex168));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex169 = (decoder.readIndex());
+        if (unionIndex169 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, null);
+        } else {
+            if (unionIndex169 == 1) {
+                Utf8 charSequence169;
+                Object oldString169 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(169);
+                if (oldString169 instanceof Utf8) {
+                    charSequence169 = (decoder).readString(((Utf8) oldString169));
+                } else {
+                    charSequence169 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, charSequence169);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F169': "+ unionIndex169));
+            }
+        }
+        int unionIndex170 = (decoder.readIndex());
+        if (unionIndex170 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, null);
+        } else {
+            if (unionIndex170 == 1) {
+                Utf8 charSequence170;
+                Object oldString170 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(170);
+                if (oldString170 instanceof Utf8) {
+                    charSequence170 = (decoder).readString(((Utf8) oldString170));
+                } else {
+                    charSequence170 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, charSequence170);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F170': "+ unionIndex170));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex171 = (decoder.readIndex());
+        if (unionIndex171 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, null);
+        } else {
+            if (unionIndex171 == 1) {
+                Utf8 charSequence171;
+                Object oldString171 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(171);
+                if (oldString171 instanceof Utf8) {
+                    charSequence171 = (decoder).readString(((Utf8) oldString171));
+                } else {
+                    charSequence171 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, charSequence171);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F171': "+ unionIndex171));
+            }
+        }
+        int unionIndex172 = (decoder.readIndex());
+        if (unionIndex172 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, null);
+        } else {
+            if (unionIndex172 == 1) {
+                Utf8 charSequence172;
+                Object oldString172 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(172);
+                if (oldString172 instanceof Utf8) {
+                    charSequence172 = (decoder).readString(((Utf8) oldString172));
+                } else {
+                    charSequence172 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, charSequence172);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F172': "+ unionIndex172));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex173 = (decoder.readIndex());
+        if (unionIndex173 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, null);
+        } else {
+            if (unionIndex173 == 1) {
+                Utf8 charSequence173;
+                Object oldString173 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(173);
+                if (oldString173 instanceof Utf8) {
+                    charSequence173 = (decoder).readString(((Utf8) oldString173));
+                } else {
+                    charSequence173 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, charSequence173);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F173': "+ unionIndex173));
+            }
+        }
+        int unionIndex174 = (decoder.readIndex());
+        if (unionIndex174 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, null);
+        } else {
+            if (unionIndex174 == 1) {
+                Utf8 charSequence174;
+                Object oldString174 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(174);
+                if (oldString174 instanceof Utf8) {
+                    charSequence174 = (decoder).readString(((Utf8) oldString174));
+                } else {
+                    charSequence174 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, charSequence174);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F174': "+ unionIndex174));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex175 = (decoder.readIndex());
+        if (unionIndex175 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, null);
+        } else {
+            if (unionIndex175 == 1) {
+                Utf8 charSequence175;
+                Object oldString175 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(175);
+                if (oldString175 instanceof Utf8) {
+                    charSequence175 = (decoder).readString(((Utf8) oldString175));
+                } else {
+                    charSequence175 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, charSequence175);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F175': "+ unionIndex175));
+            }
+        }
+        int unionIndex176 = (decoder.readIndex());
+        if (unionIndex176 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, null);
+        } else {
+            if (unionIndex176 == 1) {
+                Utf8 charSequence176;
+                Object oldString176 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(176);
+                if (oldString176 instanceof Utf8) {
+                    charSequence176 = (decoder).readString(((Utf8) oldString176));
+                } else {
+                    charSequence176 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, charSequence176);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F176': "+ unionIndex176));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex177 = (decoder.readIndex());
+        if (unionIndex177 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, null);
+        } else {
+            if (unionIndex177 == 1) {
+                Utf8 charSequence177;
+                Object oldString177 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(177);
+                if (oldString177 instanceof Utf8) {
+                    charSequence177 = (decoder).readString(((Utf8) oldString177));
+                } else {
+                    charSequence177 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, charSequence177);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F177': "+ unionIndex177));
+            }
+        }
+        int unionIndex178 = (decoder.readIndex());
+        if (unionIndex178 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, null);
+        } else {
+            if (unionIndex178 == 1) {
+                Utf8 charSequence178;
+                Object oldString178 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(178);
+                if (oldString178 instanceof Utf8) {
+                    charSequence178 = (decoder).readString(((Utf8) oldString178));
+                } else {
+                    charSequence178 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, charSequence178);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F178': "+ unionIndex178));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex179 = (decoder.readIndex());
+        if (unionIndex179 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, null);
+        } else {
+            if (unionIndex179 == 1) {
+                Utf8 charSequence179;
+                Object oldString179 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(179);
+                if (oldString179 instanceof Utf8) {
+                    charSequence179 = (decoder).readString(((Utf8) oldString179));
+                } else {
+                    charSequence179 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, charSequence179);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F179': "+ unionIndex179));
+            }
+        }
+        int unionIndex180 = (decoder.readIndex());
+        if (unionIndex180 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, null);
+        } else {
+            if (unionIndex180 == 1) {
+                Utf8 charSequence180;
+                Object oldString180 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(180);
+                if (oldString180 instanceof Utf8) {
+                    charSequence180 = (decoder).readString(((Utf8) oldString180));
+                } else {
+                    charSequence180 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, charSequence180);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F180': "+ unionIndex180));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex181 = (decoder.readIndex());
+        if (unionIndex181 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, null);
+        } else {
+            if (unionIndex181 == 1) {
+                Utf8 charSequence181;
+                Object oldString181 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(181);
+                if (oldString181 instanceof Utf8) {
+                    charSequence181 = (decoder).readString(((Utf8) oldString181));
+                } else {
+                    charSequence181 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, charSequence181);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F181': "+ unionIndex181));
+            }
+        }
+        int unionIndex182 = (decoder.readIndex());
+        if (unionIndex182 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, null);
+        } else {
+            if (unionIndex182 == 1) {
+                Utf8 charSequence182;
+                Object oldString182 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(182);
+                if (oldString182 instanceof Utf8) {
+                    charSequence182 = (decoder).readString(((Utf8) oldString182));
+                } else {
+                    charSequence182 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, charSequence182);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F182': "+ unionIndex182));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex183 = (decoder.readIndex());
+        if (unionIndex183 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, null);
+        } else {
+            if (unionIndex183 == 1) {
+                Utf8 charSequence183;
+                Object oldString183 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(183);
+                if (oldString183 instanceof Utf8) {
+                    charSequence183 = (decoder).readString(((Utf8) oldString183));
+                } else {
+                    charSequence183 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, charSequence183);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F183': "+ unionIndex183));
+            }
+        }
+        int unionIndex184 = (decoder.readIndex());
+        if (unionIndex184 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, null);
+        } else {
+            if (unionIndex184 == 1) {
+                Utf8 charSequence184;
+                Object oldString184 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(184);
+                if (oldString184 instanceof Utf8) {
+                    charSequence184 = (decoder).readString(((Utf8) oldString184));
+                } else {
+                    charSequence184 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, charSequence184);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F184': "+ unionIndex184));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex185 = (decoder.readIndex());
+        if (unionIndex185 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, null);
+        } else {
+            if (unionIndex185 == 1) {
+                Utf8 charSequence185;
+                Object oldString185 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(185);
+                if (oldString185 instanceof Utf8) {
+                    charSequence185 = (decoder).readString(((Utf8) oldString185));
+                } else {
+                    charSequence185 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, charSequence185);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F185': "+ unionIndex185));
+            }
+        }
+        int unionIndex186 = (decoder.readIndex());
+        if (unionIndex186 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, null);
+        } else {
+            if (unionIndex186 == 1) {
+                Utf8 charSequence186;
+                Object oldString186 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(186);
+                if (oldString186 instanceof Utf8) {
+                    charSequence186 = (decoder).readString(((Utf8) oldString186));
+                } else {
+                    charSequence186 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, charSequence186);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F186': "+ unionIndex186));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex187 = (decoder.readIndex());
+        if (unionIndex187 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, null);
+        } else {
+            if (unionIndex187 == 1) {
+                Utf8 charSequence187;
+                Object oldString187 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(187);
+                if (oldString187 instanceof Utf8) {
+                    charSequence187 = (decoder).readString(((Utf8) oldString187));
+                } else {
+                    charSequence187 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, charSequence187);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F187': "+ unionIndex187));
+            }
+        }
+        int unionIndex188 = (decoder.readIndex());
+        if (unionIndex188 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, null);
+        } else {
+            if (unionIndex188 == 1) {
+                Utf8 charSequence188;
+                Object oldString188 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(188);
+                if (oldString188 instanceof Utf8) {
+                    charSequence188 = (decoder).readString(((Utf8) oldString188));
+                } else {
+                    charSequence188 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, charSequence188);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F188': "+ unionIndex188));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex189 = (decoder.readIndex());
+        if (unionIndex189 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, null);
+        } else {
+            if (unionIndex189 == 1) {
+                Utf8 charSequence189;
+                Object oldString189 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(189);
+                if (oldString189 instanceof Utf8) {
+                    charSequence189 = (decoder).readString(((Utf8) oldString189));
+                } else {
+                    charSequence189 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, charSequence189);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F189': "+ unionIndex189));
+            }
+        }
+        int unionIndex190 = (decoder.readIndex());
+        if (unionIndex190 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, null);
+        } else {
+            if (unionIndex190 == 1) {
+                Utf8 charSequence190;
+                Object oldString190 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(190);
+                if (oldString190 instanceof Utf8) {
+                    charSequence190 = (decoder).readString(((Utf8) oldString190));
+                } else {
+                    charSequence190 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, charSequence190);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F190': "+ unionIndex190));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex191 = (decoder.readIndex());
+        if (unionIndex191 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, null);
+        } else {
+            if (unionIndex191 == 1) {
+                Utf8 charSequence191;
+                Object oldString191 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(191);
+                if (oldString191 instanceof Utf8) {
+                    charSequence191 = (decoder).readString(((Utf8) oldString191));
+                } else {
+                    charSequence191 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, charSequence191);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F191': "+ unionIndex191));
+            }
+        }
+        int unionIndex192 = (decoder.readIndex());
+        if (unionIndex192 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, null);
+        } else {
+            if (unionIndex192 == 1) {
+                Utf8 charSequence192;
+                Object oldString192 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(192);
+                if (oldString192 instanceof Utf8) {
+                    charSequence192 = (decoder).readString(((Utf8) oldString192));
+                } else {
+                    charSequence192 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, charSequence192);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F192': "+ unionIndex192));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex193 = (decoder.readIndex());
+        if (unionIndex193 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, null);
+        } else {
+            if (unionIndex193 == 1) {
+                Utf8 charSequence193;
+                Object oldString193 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(193);
+                if (oldString193 instanceof Utf8) {
+                    charSequence193 = (decoder).readString(((Utf8) oldString193));
+                } else {
+                    charSequence193 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, charSequence193);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F193': "+ unionIndex193));
+            }
+        }
+        int unionIndex194 = (decoder.readIndex());
+        if (unionIndex194 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, null);
+        } else {
+            if (unionIndex194 == 1) {
+                Utf8 charSequence194;
+                Object oldString194 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(194);
+                if (oldString194 instanceof Utf8) {
+                    charSequence194 = (decoder).readString(((Utf8) oldString194));
+                } else {
+                    charSequence194 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, charSequence194);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F194': "+ unionIndex194));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex195 = (decoder.readIndex());
+        if (unionIndex195 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, null);
+        } else {
+            if (unionIndex195 == 1) {
+                Utf8 charSequence195;
+                Object oldString195 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(195);
+                if (oldString195 instanceof Utf8) {
+                    charSequence195 = (decoder).readString(((Utf8) oldString195));
+                } else {
+                    charSequence195 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, charSequence195);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F195': "+ unionIndex195));
+            }
+        }
+        int unionIndex196 = (decoder.readIndex());
+        if (unionIndex196 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, null);
+        } else {
+            if (unionIndex196 == 1) {
+                Utf8 charSequence196;
+                Object oldString196 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(196);
+                if (oldString196 instanceof Utf8) {
+                    charSequence196 = (decoder).readString(((Utf8) oldString196));
+                } else {
+                    charSequence196 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, charSequence196);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F196': "+ unionIndex196));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex197 = (decoder.readIndex());
+        if (unionIndex197 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, null);
+        } else {
+            if (unionIndex197 == 1) {
+                Utf8 charSequence197;
+                Object oldString197 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(197);
+                if (oldString197 instanceof Utf8) {
+                    charSequence197 = (decoder).readString(((Utf8) oldString197));
+                } else {
+                    charSequence197 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, charSequence197);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F197': "+ unionIndex197));
+            }
+        }
+        int unionIndex198 = (decoder.readIndex());
+        if (unionIndex198 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, null);
+        } else {
+            if (unionIndex198 == 1) {
+                Utf8 charSequence198;
+                Object oldString198 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(198);
+                if (oldString198 instanceof Utf8) {
+                    charSequence198 = (decoder).readString(((Utf8) oldString198));
+                } else {
+                    charSequence198 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, charSequence198);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F198': "+ unionIndex198));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex199 = (decoder.readIndex());
+        if (unionIndex199 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, null);
+        } else {
+            if (unionIndex199 == 1) {
+                Utf8 charSequence199;
+                Object oldString199 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(199);
+                if (oldString199 instanceof Utf8) {
+                    charSequence199 = (decoder).readString(((Utf8) oldString199));
+                } else {
+                    charSequence199 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, charSequence199);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F199': "+ unionIndex199));
+            }
+        }
+        int unionIndex200 = (decoder.readIndex());
+        if (unionIndex200 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, null);
+        } else {
+            if (unionIndex200 == 1) {
+                Utf8 charSequence200;
+                Object oldString200 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(200);
+                if (oldString200 instanceof Utf8) {
+                    charSequence200 = (decoder).readString(((Utf8) oldString200));
+                } else {
+                    charSequence200 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, charSequence200);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F200': "+ unionIndex200));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex201 = (decoder.readIndex());
+        if (unionIndex201 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, null);
+        } else {
+            if (unionIndex201 == 1) {
+                Utf8 charSequence201;
+                Object oldString201 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(201);
+                if (oldString201 instanceof Utf8) {
+                    charSequence201 = (decoder).readString(((Utf8) oldString201));
+                } else {
+                    charSequence201 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, charSequence201);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F201': "+ unionIndex201));
+            }
+        }
+        int unionIndex202 = (decoder.readIndex());
+        if (unionIndex202 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, null);
+        } else {
+            if (unionIndex202 == 1) {
+                Utf8 charSequence202;
+                Object oldString202 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(202);
+                if (oldString202 instanceof Utf8) {
+                    charSequence202 = (decoder).readString(((Utf8) oldString202));
+                } else {
+                    charSequence202 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, charSequence202);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F202': "+ unionIndex202));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex203 = (decoder.readIndex());
+        if (unionIndex203 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, null);
+        } else {
+            if (unionIndex203 == 1) {
+                Utf8 charSequence203;
+                Object oldString203 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(203);
+                if (oldString203 instanceof Utf8) {
+                    charSequence203 = (decoder).readString(((Utf8) oldString203));
+                } else {
+                    charSequence203 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, charSequence203);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F203': "+ unionIndex203));
+            }
+        }
+        int unionIndex204 = (decoder.readIndex());
+        if (unionIndex204 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, null);
+        } else {
+            if (unionIndex204 == 1) {
+                Utf8 charSequence204;
+                Object oldString204 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(204);
+                if (oldString204 instanceof Utf8) {
+                    charSequence204 = (decoder).readString(((Utf8) oldString204));
+                } else {
+                    charSequence204 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, charSequence204);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F204': "+ unionIndex204));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex205 = (decoder.readIndex());
+        if (unionIndex205 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, null);
+        } else {
+            if (unionIndex205 == 1) {
+                Utf8 charSequence205;
+                Object oldString205 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(205);
+                if (oldString205 instanceof Utf8) {
+                    charSequence205 = (decoder).readString(((Utf8) oldString205));
+                } else {
+                    charSequence205 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, charSequence205);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F205': "+ unionIndex205));
+            }
+        }
+        int unionIndex206 = (decoder.readIndex());
+        if (unionIndex206 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, null);
+        } else {
+            if (unionIndex206 == 1) {
+                Utf8 charSequence206;
+                Object oldString206 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(206);
+                if (oldString206 instanceof Utf8) {
+                    charSequence206 = (decoder).readString(((Utf8) oldString206));
+                } else {
+                    charSequence206 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, charSequence206);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F206': "+ unionIndex206));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex207 = (decoder.readIndex());
+        if (unionIndex207 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, null);
+        } else {
+            if (unionIndex207 == 1) {
+                Utf8 charSequence207;
+                Object oldString207 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(207);
+                if (oldString207 instanceof Utf8) {
+                    charSequence207 = (decoder).readString(((Utf8) oldString207));
+                } else {
+                    charSequence207 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, charSequence207);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F207': "+ unionIndex207));
+            }
+        }
+        int unionIndex208 = (decoder.readIndex());
+        if (unionIndex208 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, null);
+        } else {
+            if (unionIndex208 == 1) {
+                Utf8 charSequence208;
+                Object oldString208 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(208);
+                if (oldString208 instanceof Utf8) {
+                    charSequence208 = (decoder).readString(((Utf8) oldString208));
+                } else {
+                    charSequence208 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, charSequence208);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F208': "+ unionIndex208));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex209 = (decoder.readIndex());
+        if (unionIndex209 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, null);
+        } else {
+            if (unionIndex209 == 1) {
+                Utf8 charSequence209;
+                Object oldString209 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(209);
+                if (oldString209 instanceof Utf8) {
+                    charSequence209 = (decoder).readString(((Utf8) oldString209));
+                } else {
+                    charSequence209 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, charSequence209);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F209': "+ unionIndex209));
+            }
+        }
+        int unionIndex210 = (decoder.readIndex());
+        if (unionIndex210 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, null);
+        } else {
+            if (unionIndex210 == 1) {
+                Utf8 charSequence210;
+                Object oldString210 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(210);
+                if (oldString210 instanceof Utf8) {
+                    charSequence210 = (decoder).readString(((Utf8) oldString210));
+                } else {
+                    charSequence210 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, charSequence210);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F210': "+ unionIndex210));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex211 = (decoder.readIndex());
+        if (unionIndex211 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, null);
+        } else {
+            if (unionIndex211 == 1) {
+                Utf8 charSequence211;
+                Object oldString211 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(211);
+                if (oldString211 instanceof Utf8) {
+                    charSequence211 = (decoder).readString(((Utf8) oldString211));
+                } else {
+                    charSequence211 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, charSequence211);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F211': "+ unionIndex211));
+            }
+        }
+        int unionIndex212 = (decoder.readIndex());
+        if (unionIndex212 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, null);
+        } else {
+            if (unionIndex212 == 1) {
+                Utf8 charSequence212;
+                Object oldString212 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(212);
+                if (oldString212 instanceof Utf8) {
+                    charSequence212 = (decoder).readString(((Utf8) oldString212));
+                } else {
+                    charSequence212 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, charSequence212);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F212': "+ unionIndex212));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex213 = (decoder.readIndex());
+        if (unionIndex213 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, null);
+        } else {
+            if (unionIndex213 == 1) {
+                Utf8 charSequence213;
+                Object oldString213 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(213);
+                if (oldString213 instanceof Utf8) {
+                    charSequence213 = (decoder).readString(((Utf8) oldString213));
+                } else {
+                    charSequence213 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, charSequence213);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F213': "+ unionIndex213));
+            }
+        }
+        int unionIndex214 = (decoder.readIndex());
+        if (unionIndex214 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, null);
+        } else {
+            if (unionIndex214 == 1) {
+                Utf8 charSequence214;
+                Object oldString214 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(214);
+                if (oldString214 instanceof Utf8) {
+                    charSequence214 = (decoder).readString(((Utf8) oldString214));
+                } else {
+                    charSequence214 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, charSequence214);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F214': "+ unionIndex214));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex215 = (decoder.readIndex());
+        if (unionIndex215 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, null);
+        } else {
+            if (unionIndex215 == 1) {
+                Utf8 charSequence215;
+                Object oldString215 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(215);
+                if (oldString215 instanceof Utf8) {
+                    charSequence215 = (decoder).readString(((Utf8) oldString215));
+                } else {
+                    charSequence215 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, charSequence215);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F215': "+ unionIndex215));
+            }
+        }
+        int unionIndex216 = (decoder.readIndex());
+        if (unionIndex216 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, null);
+        } else {
+            if (unionIndex216 == 1) {
+                Utf8 charSequence216;
+                Object oldString216 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(216);
+                if (oldString216 instanceof Utf8) {
+                    charSequence216 = (decoder).readString(((Utf8) oldString216));
+                } else {
+                    charSequence216 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, charSequence216);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F216': "+ unionIndex216));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex217 = (decoder.readIndex());
+        if (unionIndex217 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, null);
+        } else {
+            if (unionIndex217 == 1) {
+                Utf8 charSequence217;
+                Object oldString217 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(217);
+                if (oldString217 instanceof Utf8) {
+                    charSequence217 = (decoder).readString(((Utf8) oldString217));
+                } else {
+                    charSequence217 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, charSequence217);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F217': "+ unionIndex217));
+            }
+        }
+        int unionIndex218 = (decoder.readIndex());
+        if (unionIndex218 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, null);
+        } else {
+            if (unionIndex218 == 1) {
+                Utf8 charSequence218;
+                Object oldString218 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(218);
+                if (oldString218 instanceof Utf8) {
+                    charSequence218 = (decoder).readString(((Utf8) oldString218));
+                } else {
+                    charSequence218 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, charSequence218);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F218': "+ unionIndex218));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex219 = (decoder.readIndex());
+        if (unionIndex219 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, null);
+        } else {
+            if (unionIndex219 == 1) {
+                Utf8 charSequence219;
+                Object oldString219 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(219);
+                if (oldString219 instanceof Utf8) {
+                    charSequence219 = (decoder).readString(((Utf8) oldString219));
+                } else {
+                    charSequence219 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, charSequence219);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F219': "+ unionIndex219));
+            }
+        }
+        int unionIndex220 = (decoder.readIndex());
+        if (unionIndex220 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, null);
+        } else {
+            if (unionIndex220 == 1) {
+                Utf8 charSequence220;
+                Object oldString220 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(220);
+                if (oldString220 instanceof Utf8) {
+                    charSequence220 = (decoder).readString(((Utf8) oldString220));
+                } else {
+                    charSequence220 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, charSequence220);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F220': "+ unionIndex220));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex221 = (decoder.readIndex());
+        if (unionIndex221 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, null);
+        } else {
+            if (unionIndex221 == 1) {
+                Utf8 charSequence221;
+                Object oldString221 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(221);
+                if (oldString221 instanceof Utf8) {
+                    charSequence221 = (decoder).readString(((Utf8) oldString221));
+                } else {
+                    charSequence221 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, charSequence221);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F221': "+ unionIndex221));
+            }
+        }
+        int unionIndex222 = (decoder.readIndex());
+        if (unionIndex222 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, null);
+        } else {
+            if (unionIndex222 == 1) {
+                Utf8 charSequence222;
+                Object oldString222 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(222);
+                if (oldString222 instanceof Utf8) {
+                    charSequence222 = (decoder).readString(((Utf8) oldString222));
+                } else {
+                    charSequence222 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, charSequence222);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F222': "+ unionIndex222));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex223 = (decoder.readIndex());
+        if (unionIndex223 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, null);
+        } else {
+            if (unionIndex223 == 1) {
+                Utf8 charSequence223;
+                Object oldString223 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(223);
+                if (oldString223 instanceof Utf8) {
+                    charSequence223 = (decoder).readString(((Utf8) oldString223));
+                } else {
+                    charSequence223 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, charSequence223);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F223': "+ unionIndex223));
+            }
+        }
+        int unionIndex224 = (decoder.readIndex());
+        if (unionIndex224 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, null);
+        } else {
+            if (unionIndex224 == 1) {
+                Utf8 charSequence224;
+                Object oldString224 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(224);
+                if (oldString224 instanceof Utf8) {
+                    charSequence224 = (decoder).readString(((Utf8) oldString224));
+                } else {
+                    charSequence224 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, charSequence224);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F224': "+ unionIndex224));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex225 = (decoder.readIndex());
+        if (unionIndex225 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, null);
+        } else {
+            if (unionIndex225 == 1) {
+                Utf8 charSequence225;
+                Object oldString225 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(225);
+                if (oldString225 instanceof Utf8) {
+                    charSequence225 = (decoder).readString(((Utf8) oldString225));
+                } else {
+                    charSequence225 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, charSequence225);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F225': "+ unionIndex225));
+            }
+        }
+        int unionIndex226 = (decoder.readIndex());
+        if (unionIndex226 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, null);
+        } else {
+            if (unionIndex226 == 1) {
+                Utf8 charSequence226;
+                Object oldString226 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(226);
+                if (oldString226 instanceof Utf8) {
+                    charSequence226 = (decoder).readString(((Utf8) oldString226));
+                } else {
+                    charSequence226 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, charSequence226);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F226': "+ unionIndex226));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex227 = (decoder.readIndex());
+        if (unionIndex227 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, null);
+        } else {
+            if (unionIndex227 == 1) {
+                Utf8 charSequence227;
+                Object oldString227 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(227);
+                if (oldString227 instanceof Utf8) {
+                    charSequence227 = (decoder).readString(((Utf8) oldString227));
+                } else {
+                    charSequence227 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, charSequence227);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F227': "+ unionIndex227));
+            }
+        }
+        int unionIndex228 = (decoder.readIndex());
+        if (unionIndex228 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, null);
+        } else {
+            if (unionIndex228 == 1) {
+                Utf8 charSequence228;
+                Object oldString228 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(228);
+                if (oldString228 instanceof Utf8) {
+                    charSequence228 = (decoder).readString(((Utf8) oldString228));
+                } else {
+                    charSequence228 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, charSequence228);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F228': "+ unionIndex228));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex229 = (decoder.readIndex());
+        if (unionIndex229 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, null);
+        } else {
+            if (unionIndex229 == 1) {
+                Utf8 charSequence229;
+                Object oldString229 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(229);
+                if (oldString229 instanceof Utf8) {
+                    charSequence229 = (decoder).readString(((Utf8) oldString229));
+                } else {
+                    charSequence229 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, charSequence229);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F229': "+ unionIndex229));
+            }
+        }
+        int unionIndex230 = (decoder.readIndex());
+        if (unionIndex230 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, null);
+        } else {
+            if (unionIndex230 == 1) {
+                Utf8 charSequence230;
+                Object oldString230 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(230);
+                if (oldString230 instanceof Utf8) {
+                    charSequence230 = (decoder).readString(((Utf8) oldString230));
+                } else {
+                    charSequence230 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, charSequence230);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F230': "+ unionIndex230));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex231 = (decoder.readIndex());
+        if (unionIndex231 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, null);
+        } else {
+            if (unionIndex231 == 1) {
+                Utf8 charSequence231;
+                Object oldString231 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(231);
+                if (oldString231 instanceof Utf8) {
+                    charSequence231 = (decoder).readString(((Utf8) oldString231));
+                } else {
+                    charSequence231 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, charSequence231);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F231': "+ unionIndex231));
+            }
+        }
+        int unionIndex232 = (decoder.readIndex());
+        if (unionIndex232 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, null);
+        } else {
+            if (unionIndex232 == 1) {
+                Utf8 charSequence232;
+                Object oldString232 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(232);
+                if (oldString232 instanceof Utf8) {
+                    charSequence232 = (decoder).readString(((Utf8) oldString232));
+                } else {
+                    charSequence232 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, charSequence232);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F232': "+ unionIndex232));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex233 = (decoder.readIndex());
+        if (unionIndex233 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, null);
+        } else {
+            if (unionIndex233 == 1) {
+                Utf8 charSequence233;
+                Object oldString233 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(233);
+                if (oldString233 instanceof Utf8) {
+                    charSequence233 = (decoder).readString(((Utf8) oldString233));
+                } else {
+                    charSequence233 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, charSequence233);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F233': "+ unionIndex233));
+            }
+        }
+        int unionIndex234 = (decoder.readIndex());
+        if (unionIndex234 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, null);
+        } else {
+            if (unionIndex234 == 1) {
+                Utf8 charSequence234;
+                Object oldString234 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(234);
+                if (oldString234 instanceof Utf8) {
+                    charSequence234 = (decoder).readString(((Utf8) oldString234));
+                } else {
+                    charSequence234 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, charSequence234);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F234': "+ unionIndex234));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex235 = (decoder.readIndex());
+        if (unionIndex235 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, null);
+        } else {
+            if (unionIndex235 == 1) {
+                Utf8 charSequence235;
+                Object oldString235 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(235);
+                if (oldString235 instanceof Utf8) {
+                    charSequence235 = (decoder).readString(((Utf8) oldString235));
+                } else {
+                    charSequence235 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, charSequence235);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F235': "+ unionIndex235));
+            }
+        }
+        int unionIndex236 = (decoder.readIndex());
+        if (unionIndex236 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, null);
+        } else {
+            if (unionIndex236 == 1) {
+                Utf8 charSequence236;
+                Object oldString236 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(236);
+                if (oldString236 instanceof Utf8) {
+                    charSequence236 = (decoder).readString(((Utf8) oldString236));
+                } else {
+                    charSequence236 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, charSequence236);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F236': "+ unionIndex236));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex237 = (decoder.readIndex());
+        if (unionIndex237 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, null);
+        } else {
+            if (unionIndex237 == 1) {
+                Utf8 charSequence237;
+                Object oldString237 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(237);
+                if (oldString237 instanceof Utf8) {
+                    charSequence237 = (decoder).readString(((Utf8) oldString237));
+                } else {
+                    charSequence237 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, charSequence237);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F237': "+ unionIndex237));
+            }
+        }
+        int unionIndex238 = (decoder.readIndex());
+        if (unionIndex238 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, null);
+        } else {
+            if (unionIndex238 == 1) {
+                Utf8 charSequence238;
+                Object oldString238 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(238);
+                if (oldString238 instanceof Utf8) {
+                    charSequence238 = (decoder).readString(((Utf8) oldString238));
+                } else {
+                    charSequence238 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, charSequence238);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F238': "+ unionIndex238));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex239 = (decoder.readIndex());
+        if (unionIndex239 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, null);
+        } else {
+            if (unionIndex239 == 1) {
+                Utf8 charSequence239;
+                Object oldString239 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(239);
+                if (oldString239 instanceof Utf8) {
+                    charSequence239 = (decoder).readString(((Utf8) oldString239));
+                } else {
+                    charSequence239 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, charSequence239);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F239': "+ unionIndex239));
+            }
+        }
+        int unionIndex240 = (decoder.readIndex());
+        if (unionIndex240 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, null);
+        } else {
+            if (unionIndex240 == 1) {
+                Utf8 charSequence240;
+                Object oldString240 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(240);
+                if (oldString240 instanceof Utf8) {
+                    charSequence240 = (decoder).readString(((Utf8) oldString240));
+                } else {
+                    charSequence240 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, charSequence240);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F240': "+ unionIndex240));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex241 = (decoder.readIndex());
+        if (unionIndex241 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, null);
+        } else {
+            if (unionIndex241 == 1) {
+                Utf8 charSequence241;
+                Object oldString241 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(241);
+                if (oldString241 instanceof Utf8) {
+                    charSequence241 = (decoder).readString(((Utf8) oldString241));
+                } else {
+                    charSequence241 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, charSequence241);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F241': "+ unionIndex241));
+            }
+        }
+        int unionIndex242 = (decoder.readIndex());
+        if (unionIndex242 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, null);
+        } else {
+            if (unionIndex242 == 1) {
+                Utf8 charSequence242;
+                Object oldString242 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(242);
+                if (oldString242 instanceof Utf8) {
+                    charSequence242 = (decoder).readString(((Utf8) oldString242));
+                } else {
+                    charSequence242 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, charSequence242);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F242': "+ unionIndex242));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex243 = (decoder.readIndex());
+        if (unionIndex243 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, null);
+        } else {
+            if (unionIndex243 == 1) {
+                Utf8 charSequence243;
+                Object oldString243 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(243);
+                if (oldString243 instanceof Utf8) {
+                    charSequence243 = (decoder).readString(((Utf8) oldString243));
+                } else {
+                    charSequence243 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, charSequence243);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F243': "+ unionIndex243));
+            }
+        }
+        int unionIndex244 = (decoder.readIndex());
+        if (unionIndex244 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, null);
+        } else {
+            if (unionIndex244 == 1) {
+                Utf8 charSequence244;
+                Object oldString244 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(244);
+                if (oldString244 instanceof Utf8) {
+                    charSequence244 = (decoder).readString(((Utf8) oldString244));
+                } else {
+                    charSequence244 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, charSequence244);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F244': "+ unionIndex244));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex245 = (decoder.readIndex());
+        if (unionIndex245 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, null);
+        } else {
+            if (unionIndex245 == 1) {
+                Utf8 charSequence245;
+                Object oldString245 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(245);
+                if (oldString245 instanceof Utf8) {
+                    charSequence245 = (decoder).readString(((Utf8) oldString245));
+                } else {
+                    charSequence245 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, charSequence245);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F245': "+ unionIndex245));
+            }
+        }
+        int unionIndex246 = (decoder.readIndex());
+        if (unionIndex246 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, null);
+        } else {
+            if (unionIndex246 == 1) {
+                Utf8 charSequence246;
+                Object oldString246 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(246);
+                if (oldString246 instanceof Utf8) {
+                    charSequence246 = (decoder).readString(((Utf8) oldString246));
+                } else {
+                    charSequence246 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, charSequence246);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F246': "+ unionIndex246));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex247 = (decoder.readIndex());
+        if (unionIndex247 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, null);
+        } else {
+            if (unionIndex247 == 1) {
+                Utf8 charSequence247;
+                Object oldString247 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(247);
+                if (oldString247 instanceof Utf8) {
+                    charSequence247 = (decoder).readString(((Utf8) oldString247));
+                } else {
+                    charSequence247 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, charSequence247);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F247': "+ unionIndex247));
+            }
+        }
+        int unionIndex248 = (decoder.readIndex());
+        if (unionIndex248 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, null);
+        } else {
+            if (unionIndex248 == 1) {
+                Utf8 charSequence248;
+                Object oldString248 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(248);
+                if (oldString248 instanceof Utf8) {
+                    charSequence248 = (decoder).readString(((Utf8) oldString248));
+                } else {
+                    charSequence248 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, charSequence248);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F248': "+ unionIndex248));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex249 = (decoder.readIndex());
+        if (unionIndex249 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, null);
+        } else {
+            if (unionIndex249 == 1) {
+                Utf8 charSequence249;
+                Object oldString249 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(249);
+                if (oldString249 instanceof Utf8) {
+                    charSequence249 = (decoder).readString(((Utf8) oldString249));
+                } else {
+                    charSequence249 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, charSequence249);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F249': "+ unionIndex249));
+            }
+        }
+        int unionIndex250 = (decoder.readIndex());
+        if (unionIndex250 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, null);
+        } else {
+            if (unionIndex250 == 1) {
+                Utf8 charSequence250;
+                Object oldString250 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(250);
+                if (oldString250 instanceof Utf8) {
+                    charSequence250 = (decoder).readString(((Utf8) oldString250));
+                } else {
+                    charSequence250 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, charSequence250);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F250': "+ unionIndex250));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex251 = (decoder.readIndex());
+        if (unionIndex251 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, null);
+        } else {
+            if (unionIndex251 == 1) {
+                Utf8 charSequence251;
+                Object oldString251 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(251);
+                if (oldString251 instanceof Utf8) {
+                    charSequence251 = (decoder).readString(((Utf8) oldString251));
+                } else {
+                    charSequence251 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, charSequence251);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F251': "+ unionIndex251));
+            }
+        }
+        int unionIndex252 = (decoder.readIndex());
+        if (unionIndex252 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, null);
+        } else {
+            if (unionIndex252 == 1) {
+                Utf8 charSequence252;
+                Object oldString252 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(252);
+                if (oldString252 instanceof Utf8) {
+                    charSequence252 = (decoder).readString(((Utf8) oldString252));
+                } else {
+                    charSequence252 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, charSequence252);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F252': "+ unionIndex252));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex253 = (decoder.readIndex());
+        if (unionIndex253 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, null);
+        } else {
+            if (unionIndex253 == 1) {
+                Utf8 charSequence253;
+                Object oldString253 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(253);
+                if (oldString253 instanceof Utf8) {
+                    charSequence253 = (decoder).readString(((Utf8) oldString253));
+                } else {
+                    charSequence253 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, charSequence253);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F253': "+ unionIndex253));
+            }
+        }
+        int unionIndex254 = (decoder.readIndex());
+        if (unionIndex254 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, null);
+        } else {
+            if (unionIndex254 == 1) {
+                Utf8 charSequence254;
+                Object oldString254 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(254);
+                if (oldString254 instanceof Utf8) {
+                    charSequence254 = (decoder).readString(((Utf8) oldString254));
+                } else {
+                    charSequence254 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, charSequence254);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F254': "+ unionIndex254));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex255 = (decoder.readIndex());
+        if (unionIndex255 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, null);
+        } else {
+            if (unionIndex255 == 1) {
+                Utf8 charSequence255;
+                Object oldString255 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(255);
+                if (oldString255 instanceof Utf8) {
+                    charSequence255 = (decoder).readString(((Utf8) oldString255));
+                } else {
+                    charSequence255 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, charSequence255);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F255': "+ unionIndex255));
+            }
+        }
+        int unionIndex256 = (decoder.readIndex());
+        if (unionIndex256 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, null);
+        } else {
+            if (unionIndex256 == 1) {
+                Utf8 charSequence256;
+                Object oldString256 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(256);
+                if (oldString256 instanceof Utf8) {
+                    charSequence256 = (decoder).readString(((Utf8) oldString256));
+                } else {
+                    charSequence256 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, charSequence256);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F256': "+ unionIndex256));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex257 = (decoder.readIndex());
+        if (unionIndex257 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, null);
+        } else {
+            if (unionIndex257 == 1) {
+                Utf8 charSequence257;
+                Object oldString257 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(257);
+                if (oldString257 instanceof Utf8) {
+                    charSequence257 = (decoder).readString(((Utf8) oldString257));
+                } else {
+                    charSequence257 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, charSequence257);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F257': "+ unionIndex257));
+            }
+        }
+        int unionIndex258 = (decoder.readIndex());
+        if (unionIndex258 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, null);
+        } else {
+            if (unionIndex258 == 1) {
+                Utf8 charSequence258;
+                Object oldString258 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(258);
+                if (oldString258 instanceof Utf8) {
+                    charSequence258 = (decoder).readString(((Utf8) oldString258));
+                } else {
+                    charSequence258 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, charSequence258);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F258': "+ unionIndex258));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex259 = (decoder.readIndex());
+        if (unionIndex259 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, null);
+        } else {
+            if (unionIndex259 == 1) {
+                Utf8 charSequence259;
+                Object oldString259 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(259);
+                if (oldString259 instanceof Utf8) {
+                    charSequence259 = (decoder).readString(((Utf8) oldString259));
+                } else {
+                    charSequence259 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, charSequence259);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F259': "+ unionIndex259));
+            }
+        }
+        int unionIndex260 = (decoder.readIndex());
+        if (unionIndex260 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, null);
+        } else {
+            if (unionIndex260 == 1) {
+                Utf8 charSequence260;
+                Object oldString260 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(260);
+                if (oldString260 instanceof Utf8) {
+                    charSequence260 = (decoder).readString(((Utf8) oldString260));
+                } else {
+                    charSequence260 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, charSequence260);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F260': "+ unionIndex260));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex261 = (decoder.readIndex());
+        if (unionIndex261 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, null);
+        } else {
+            if (unionIndex261 == 1) {
+                Utf8 charSequence261;
+                Object oldString261 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(261);
+                if (oldString261 instanceof Utf8) {
+                    charSequence261 = (decoder).readString(((Utf8) oldString261));
+                } else {
+                    charSequence261 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, charSequence261);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F261': "+ unionIndex261));
+            }
+        }
+        int unionIndex262 = (decoder.readIndex());
+        if (unionIndex262 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, null);
+        } else {
+            if (unionIndex262 == 1) {
+                Utf8 charSequence262;
+                Object oldString262 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(262);
+                if (oldString262 instanceof Utf8) {
+                    charSequence262 = (decoder).readString(((Utf8) oldString262));
+                } else {
+                    charSequence262 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, charSequence262);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F262': "+ unionIndex262));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex263 = (decoder.readIndex());
+        if (unionIndex263 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, null);
+        } else {
+            if (unionIndex263 == 1) {
+                Utf8 charSequence263;
+                Object oldString263 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(263);
+                if (oldString263 instanceof Utf8) {
+                    charSequence263 = (decoder).readString(((Utf8) oldString263));
+                } else {
+                    charSequence263 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, charSequence263);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F263': "+ unionIndex263));
+            }
+        }
+        int unionIndex264 = (decoder.readIndex());
+        if (unionIndex264 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, null);
+        } else {
+            if (unionIndex264 == 1) {
+                Utf8 charSequence264;
+                Object oldString264 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(264);
+                if (oldString264 instanceof Utf8) {
+                    charSequence264 = (decoder).readString(((Utf8) oldString264));
+                } else {
+                    charSequence264 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, charSequence264);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F264': "+ unionIndex264));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex265 = (decoder.readIndex());
+        if (unionIndex265 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, null);
+        } else {
+            if (unionIndex265 == 1) {
+                Utf8 charSequence265;
+                Object oldString265 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(265);
+                if (oldString265 instanceof Utf8) {
+                    charSequence265 = (decoder).readString(((Utf8) oldString265));
+                } else {
+                    charSequence265 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, charSequence265);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F265': "+ unionIndex265));
+            }
+        }
+        int unionIndex266 = (decoder.readIndex());
+        if (unionIndex266 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, null);
+        } else {
+            if (unionIndex266 == 1) {
+                Utf8 charSequence266;
+                Object oldString266 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(266);
+                if (oldString266 instanceof Utf8) {
+                    charSequence266 = (decoder).readString(((Utf8) oldString266));
+                } else {
+                    charSequence266 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, charSequence266);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F266': "+ unionIndex266));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex267 = (decoder.readIndex());
+        if (unionIndex267 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, null);
+        } else {
+            if (unionIndex267 == 1) {
+                Utf8 charSequence267;
+                Object oldString267 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(267);
+                if (oldString267 instanceof Utf8) {
+                    charSequence267 = (decoder).readString(((Utf8) oldString267));
+                } else {
+                    charSequence267 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, charSequence267);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F267': "+ unionIndex267));
+            }
+        }
+        int unionIndex268 = (decoder.readIndex());
+        if (unionIndex268 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, null);
+        } else {
+            if (unionIndex268 == 1) {
+                Utf8 charSequence268;
+                Object oldString268 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(268);
+                if (oldString268 instanceof Utf8) {
+                    charSequence268 = (decoder).readString(((Utf8) oldString268));
+                } else {
+                    charSequence268 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, charSequence268);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F268': "+ unionIndex268));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex269 = (decoder.readIndex());
+        if (unionIndex269 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, null);
+        } else {
+            if (unionIndex269 == 1) {
+                Utf8 charSequence269;
+                Object oldString269 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(269);
+                if (oldString269 instanceof Utf8) {
+                    charSequence269 = (decoder).readString(((Utf8) oldString269));
+                } else {
+                    charSequence269 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, charSequence269);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F269': "+ unionIndex269));
+            }
+        }
+        int unionIndex270 = (decoder.readIndex());
+        if (unionIndex270 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, null);
+        } else {
+            if (unionIndex270 == 1) {
+                Utf8 charSequence270;
+                Object oldString270 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(270);
+                if (oldString270 instanceof Utf8) {
+                    charSequence270 = (decoder).readString(((Utf8) oldString270));
+                } else {
+                    charSequence270 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, charSequence270);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F270': "+ unionIndex270));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex271 = (decoder.readIndex());
+        if (unionIndex271 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, null);
+        } else {
+            if (unionIndex271 == 1) {
+                Utf8 charSequence271;
+                Object oldString271 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(271);
+                if (oldString271 instanceof Utf8) {
+                    charSequence271 = (decoder).readString(((Utf8) oldString271));
+                } else {
+                    charSequence271 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, charSequence271);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F271': "+ unionIndex271));
+            }
+        }
+        int unionIndex272 = (decoder.readIndex());
+        if (unionIndex272 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, null);
+        } else {
+            if (unionIndex272 == 1) {
+                Utf8 charSequence272;
+                Object oldString272 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(272);
+                if (oldString272 instanceof Utf8) {
+                    charSequence272 = (decoder).readString(((Utf8) oldString272));
+                } else {
+                    charSequence272 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, charSequence272);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F272': "+ unionIndex272));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex273 = (decoder.readIndex());
+        if (unionIndex273 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, null);
+        } else {
+            if (unionIndex273 == 1) {
+                Utf8 charSequence273;
+                Object oldString273 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(273);
+                if (oldString273 instanceof Utf8) {
+                    charSequence273 = (decoder).readString(((Utf8) oldString273));
+                } else {
+                    charSequence273 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, charSequence273);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F273': "+ unionIndex273));
+            }
+        }
+        int unionIndex274 = (decoder.readIndex());
+        if (unionIndex274 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, null);
+        } else {
+            if (unionIndex274 == 1) {
+                Utf8 charSequence274;
+                Object oldString274 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(274);
+                if (oldString274 instanceof Utf8) {
+                    charSequence274 = (decoder).readString(((Utf8) oldString274));
+                } else {
+                    charSequence274 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, charSequence274);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F274': "+ unionIndex274));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex275 = (decoder.readIndex());
+        if (unionIndex275 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, null);
+        } else {
+            if (unionIndex275 == 1) {
+                Utf8 charSequence275;
+                Object oldString275 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(275);
+                if (oldString275 instanceof Utf8) {
+                    charSequence275 = (decoder).readString(((Utf8) oldString275));
+                } else {
+                    charSequence275 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, charSequence275);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F275': "+ unionIndex275));
+            }
+        }
+        int unionIndex276 = (decoder.readIndex());
+        if (unionIndex276 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, null);
+        } else {
+            if (unionIndex276 == 1) {
+                Utf8 charSequence276;
+                Object oldString276 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(276);
+                if (oldString276 instanceof Utf8) {
+                    charSequence276 = (decoder).readString(((Utf8) oldString276));
+                } else {
+                    charSequence276 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, charSequence276);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F276': "+ unionIndex276));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex277 = (decoder.readIndex());
+        if (unionIndex277 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, null);
+        } else {
+            if (unionIndex277 == 1) {
+                Utf8 charSequence277;
+                Object oldString277 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(277);
+                if (oldString277 instanceof Utf8) {
+                    charSequence277 = (decoder).readString(((Utf8) oldString277));
+                } else {
+                    charSequence277 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, charSequence277);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F277': "+ unionIndex277));
+            }
+        }
+        int unionIndex278 = (decoder.readIndex());
+        if (unionIndex278 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, null);
+        } else {
+            if (unionIndex278 == 1) {
+                Utf8 charSequence278;
+                Object oldString278 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(278);
+                if (oldString278 instanceof Utf8) {
+                    charSequence278 = (decoder).readString(((Utf8) oldString278));
+                } else {
+                    charSequence278 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, charSequence278);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F278': "+ unionIndex278));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex279 = (decoder.readIndex());
+        if (unionIndex279 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, null);
+        } else {
+            if (unionIndex279 == 1) {
+                Utf8 charSequence279;
+                Object oldString279 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(279);
+                if (oldString279 instanceof Utf8) {
+                    charSequence279 = (decoder).readString(((Utf8) oldString279));
+                } else {
+                    charSequence279 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, charSequence279);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F279': "+ unionIndex279));
+            }
+        }
+        int unionIndex280 = (decoder.readIndex());
+        if (unionIndex280 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, null);
+        } else {
+            if (unionIndex280 == 1) {
+                Utf8 charSequence280;
+                Object oldString280 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(280);
+                if (oldString280 instanceof Utf8) {
+                    charSequence280 = (decoder).readString(((Utf8) oldString280));
+                } else {
+                    charSequence280 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, charSequence280);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F280': "+ unionIndex280));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex281 = (decoder.readIndex());
+        if (unionIndex281 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, null);
+        } else {
+            if (unionIndex281 == 1) {
+                Utf8 charSequence281;
+                Object oldString281 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(281);
+                if (oldString281 instanceof Utf8) {
+                    charSequence281 = (decoder).readString(((Utf8) oldString281));
+                } else {
+                    charSequence281 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, charSequence281);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F281': "+ unionIndex281));
+            }
+        }
+        int unionIndex282 = (decoder.readIndex());
+        if (unionIndex282 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, null);
+        } else {
+            if (unionIndex282 == 1) {
+                Utf8 charSequence282;
+                Object oldString282 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(282);
+                if (oldString282 instanceof Utf8) {
+                    charSequence282 = (decoder).readString(((Utf8) oldString282));
+                } else {
+                    charSequence282 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, charSequence282);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F282': "+ unionIndex282));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex283 = (decoder.readIndex());
+        if (unionIndex283 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, null);
+        } else {
+            if (unionIndex283 == 1) {
+                Utf8 charSequence283;
+                Object oldString283 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(283);
+                if (oldString283 instanceof Utf8) {
+                    charSequence283 = (decoder).readString(((Utf8) oldString283));
+                } else {
+                    charSequence283 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, charSequence283);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F283': "+ unionIndex283));
+            }
+        }
+        int unionIndex284 = (decoder.readIndex());
+        if (unionIndex284 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, null);
+        } else {
+            if (unionIndex284 == 1) {
+                Utf8 charSequence284;
+                Object oldString284 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(284);
+                if (oldString284 instanceof Utf8) {
+                    charSequence284 = (decoder).readString(((Utf8) oldString284));
+                } else {
+                    charSequence284 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, charSequence284);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F284': "+ unionIndex284));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex285 = (decoder.readIndex());
+        if (unionIndex285 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, null);
+        } else {
+            if (unionIndex285 == 1) {
+                Utf8 charSequence285;
+                Object oldString285 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(285);
+                if (oldString285 instanceof Utf8) {
+                    charSequence285 = (decoder).readString(((Utf8) oldString285));
+                } else {
+                    charSequence285 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, charSequence285);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F285': "+ unionIndex285));
+            }
+        }
+        int unionIndex286 = (decoder.readIndex());
+        if (unionIndex286 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, null);
+        } else {
+            if (unionIndex286 == 1) {
+                Utf8 charSequence286;
+                Object oldString286 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(286);
+                if (oldString286 instanceof Utf8) {
+                    charSequence286 = (decoder).readString(((Utf8) oldString286));
+                } else {
+                    charSequence286 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, charSequence286);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F286': "+ unionIndex286));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex287 = (decoder.readIndex());
+        if (unionIndex287 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, null);
+        } else {
+            if (unionIndex287 == 1) {
+                Utf8 charSequence287;
+                Object oldString287 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(287);
+                if (oldString287 instanceof Utf8) {
+                    charSequence287 = (decoder).readString(((Utf8) oldString287));
+                } else {
+                    charSequence287 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, charSequence287);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F287': "+ unionIndex287));
+            }
+        }
+        int unionIndex288 = (decoder.readIndex());
+        if (unionIndex288 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, null);
+        } else {
+            if (unionIndex288 == 1) {
+                Utf8 charSequence288;
+                Object oldString288 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(288);
+                if (oldString288 instanceof Utf8) {
+                    charSequence288 = (decoder).readString(((Utf8) oldString288));
+                } else {
+                    charSequence288 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, charSequence288);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F288': "+ unionIndex288));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex289 = (decoder.readIndex());
+        if (unionIndex289 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, null);
+        } else {
+            if (unionIndex289 == 1) {
+                Utf8 charSequence289;
+                Object oldString289 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(289);
+                if (oldString289 instanceof Utf8) {
+                    charSequence289 = (decoder).readString(((Utf8) oldString289));
+                } else {
+                    charSequence289 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, charSequence289);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F289': "+ unionIndex289));
+            }
+        }
+        int unionIndex290 = (decoder.readIndex());
+        if (unionIndex290 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, null);
+        } else {
+            if (unionIndex290 == 1) {
+                Utf8 charSequence290;
+                Object oldString290 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(290);
+                if (oldString290 instanceof Utf8) {
+                    charSequence290 = (decoder).readString(((Utf8) oldString290));
+                } else {
+                    charSequence290 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, charSequence290);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F290': "+ unionIndex290));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex291 = (decoder.readIndex());
+        if (unionIndex291 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, null);
+        } else {
+            if (unionIndex291 == 1) {
+                Utf8 charSequence291;
+                Object oldString291 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(291);
+                if (oldString291 instanceof Utf8) {
+                    charSequence291 = (decoder).readString(((Utf8) oldString291));
+                } else {
+                    charSequence291 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, charSequence291);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F291': "+ unionIndex291));
+            }
+        }
+        int unionIndex292 = (decoder.readIndex());
+        if (unionIndex292 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, null);
+        } else {
+            if (unionIndex292 == 1) {
+                Utf8 charSequence292;
+                Object oldString292 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(292);
+                if (oldString292 instanceof Utf8) {
+                    charSequence292 = (decoder).readString(((Utf8) oldString292));
+                } else {
+                    charSequence292 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, charSequence292);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F292': "+ unionIndex292));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex293 = (decoder.readIndex());
+        if (unionIndex293 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, null);
+        } else {
+            if (unionIndex293 == 1) {
+                Utf8 charSequence293;
+                Object oldString293 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(293);
+                if (oldString293 instanceof Utf8) {
+                    charSequence293 = (decoder).readString(((Utf8) oldString293));
+                } else {
+                    charSequence293 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, charSequence293);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F293': "+ unionIndex293));
+            }
+        }
+        int unionIndex294 = (decoder.readIndex());
+        if (unionIndex294 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, null);
+        } else {
+            if (unionIndex294 == 1) {
+                Utf8 charSequence294;
+                Object oldString294 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(294);
+                if (oldString294 instanceof Utf8) {
+                    charSequence294 = (decoder).readString(((Utf8) oldString294));
+                } else {
+                    charSequence294 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, charSequence294);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F294': "+ unionIndex294));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex295 = (decoder.readIndex());
+        if (unionIndex295 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, null);
+        } else {
+            if (unionIndex295 == 1) {
+                Utf8 charSequence295;
+                Object oldString295 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(295);
+                if (oldString295 instanceof Utf8) {
+                    charSequence295 = (decoder).readString(((Utf8) oldString295));
+                } else {
+                    charSequence295 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, charSequence295);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F295': "+ unionIndex295));
+            }
+        }
+        int unionIndex296 = (decoder.readIndex());
+        if (unionIndex296 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, null);
+        } else {
+            if (unionIndex296 == 1) {
+                Utf8 charSequence296;
+                Object oldString296 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(296);
+                if (oldString296 instanceof Utf8) {
+                    charSequence296 = (decoder).readString(((Utf8) oldString296));
+                } else {
+                    charSequence296 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, charSequence296);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F296': "+ unionIndex296));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex297 = (decoder.readIndex());
+        if (unionIndex297 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, null);
+        } else {
+            if (unionIndex297 == 1) {
+                Utf8 charSequence297;
+                Object oldString297 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(297);
+                if (oldString297 instanceof Utf8) {
+                    charSequence297 = (decoder).readString(((Utf8) oldString297));
+                } else {
+                    charSequence297 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, charSequence297);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F297': "+ unionIndex297));
+            }
+        }
+        int unionIndex298 = (decoder.readIndex());
+        if (unionIndex298 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, null);
+        } else {
+            if (unionIndex298 == 1) {
+                Utf8 charSequence298;
+                Object oldString298 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(298);
+                if (oldString298 instanceof Utf8) {
+                    charSequence298 = (decoder).readString(((Utf8) oldString298));
+                } else {
+                    charSequence298 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, charSequence298);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F298': "+ unionIndex298));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex299 = (decoder.readIndex());
+        if (unionIndex299 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, null);
+        } else {
+            if (unionIndex299 == 1) {
+                Utf8 charSequence299;
+                Object oldString299 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(299);
+                if (oldString299 instanceof Utf8) {
+                    charSequence299 = (decoder).readString(((Utf8) oldString299));
+                } else {
+                    charSequence299 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, charSequence299);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F299': "+ unionIndex299));
+            }
+        }
+        int unionIndex300 = (decoder.readIndex());
+        if (unionIndex300 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, null);
+        } else {
+            if (unionIndex300 == 1) {
+                Utf8 charSequence300;
+                Object oldString300 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(300);
+                if (oldString300 instanceof Utf8) {
+                    charSequence300 = (decoder).readString(((Utf8) oldString300));
+                } else {
+                    charSequence300 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, charSequence300);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F300': "+ unionIndex300));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex301 = (decoder.readIndex());
+        if (unionIndex301 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, null);
+        } else {
+            if (unionIndex301 == 1) {
+                Utf8 charSequence301;
+                Object oldString301 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(301);
+                if (oldString301 instanceof Utf8) {
+                    charSequence301 = (decoder).readString(((Utf8) oldString301));
+                } else {
+                    charSequence301 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, charSequence301);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F301': "+ unionIndex301));
+            }
+        }
+        int unionIndex302 = (decoder.readIndex());
+        if (unionIndex302 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, null);
+        } else {
+            if (unionIndex302 == 1) {
+                Utf8 charSequence302;
+                Object oldString302 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(302);
+                if (oldString302 instanceof Utf8) {
+                    charSequence302 = (decoder).readString(((Utf8) oldString302));
+                } else {
+                    charSequence302 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, charSequence302);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F302': "+ unionIndex302));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex303 = (decoder.readIndex());
+        if (unionIndex303 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, null);
+        } else {
+            if (unionIndex303 == 1) {
+                Utf8 charSequence303;
+                Object oldString303 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(303);
+                if (oldString303 instanceof Utf8) {
+                    charSequence303 = (decoder).readString(((Utf8) oldString303));
+                } else {
+                    charSequence303 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, charSequence303);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F303': "+ unionIndex303));
+            }
+        }
+        int unionIndex304 = (decoder.readIndex());
+        if (unionIndex304 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, null);
+        } else {
+            if (unionIndex304 == 1) {
+                Utf8 charSequence304;
+                Object oldString304 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(304);
+                if (oldString304 instanceof Utf8) {
+                    charSequence304 = (decoder).readString(((Utf8) oldString304));
+                } else {
+                    charSequence304 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, charSequence304);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F304': "+ unionIndex304));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex305 = (decoder.readIndex());
+        if (unionIndex305 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, null);
+        } else {
+            if (unionIndex305 == 1) {
+                Utf8 charSequence305;
+                Object oldString305 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(305);
+                if (oldString305 instanceof Utf8) {
+                    charSequence305 = (decoder).readString(((Utf8) oldString305));
+                } else {
+                    charSequence305 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, charSequence305);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F305': "+ unionIndex305));
+            }
+        }
+        int unionIndex306 = (decoder.readIndex());
+        if (unionIndex306 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, null);
+        } else {
+            if (unionIndex306 == 1) {
+                Utf8 charSequence306;
+                Object oldString306 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(306);
+                if (oldString306 instanceof Utf8) {
+                    charSequence306 = (decoder).readString(((Utf8) oldString306));
+                } else {
+                    charSequence306 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, charSequence306);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F306': "+ unionIndex306));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex307 = (decoder.readIndex());
+        if (unionIndex307 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, null);
+        } else {
+            if (unionIndex307 == 1) {
+                Utf8 charSequence307;
+                Object oldString307 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(307);
+                if (oldString307 instanceof Utf8) {
+                    charSequence307 = (decoder).readString(((Utf8) oldString307));
+                } else {
+                    charSequence307 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, charSequence307);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F307': "+ unionIndex307));
+            }
+        }
+        int unionIndex308 = (decoder.readIndex());
+        if (unionIndex308 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, null);
+        } else {
+            if (unionIndex308 == 1) {
+                Utf8 charSequence308;
+                Object oldString308 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(308);
+                if (oldString308 instanceof Utf8) {
+                    charSequence308 = (decoder).readString(((Utf8) oldString308));
+                } else {
+                    charSequence308 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, charSequence308);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F308': "+ unionIndex308));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex309 = (decoder.readIndex());
+        if (unionIndex309 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, null);
+        } else {
+            if (unionIndex309 == 1) {
+                Utf8 charSequence309;
+                Object oldString309 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(309);
+                if (oldString309 instanceof Utf8) {
+                    charSequence309 = (decoder).readString(((Utf8) oldString309));
+                } else {
+                    charSequence309 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, charSequence309);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F309': "+ unionIndex309));
+            }
+        }
+        int unionIndex310 = (decoder.readIndex());
+        if (unionIndex310 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, null);
+        } else {
+            if (unionIndex310 == 1) {
+                Utf8 charSequence310;
+                Object oldString310 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(310);
+                if (oldString310 instanceof Utf8) {
+                    charSequence310 = (decoder).readString(((Utf8) oldString310));
+                } else {
+                    charSequence310 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, charSequence310);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F310': "+ unionIndex310));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex311 = (decoder.readIndex());
+        if (unionIndex311 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, null);
+        } else {
+            if (unionIndex311 == 1) {
+                Utf8 charSequence311;
+                Object oldString311 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(311);
+                if (oldString311 instanceof Utf8) {
+                    charSequence311 = (decoder).readString(((Utf8) oldString311));
+                } else {
+                    charSequence311 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, charSequence311);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F311': "+ unionIndex311));
+            }
+        }
+        int unionIndex312 = (decoder.readIndex());
+        if (unionIndex312 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, null);
+        } else {
+            if (unionIndex312 == 1) {
+                Utf8 charSequence312;
+                Object oldString312 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(312);
+                if (oldString312 instanceof Utf8) {
+                    charSequence312 = (decoder).readString(((Utf8) oldString312));
+                } else {
+                    charSequence312 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, charSequence312);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F312': "+ unionIndex312));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex313 = (decoder.readIndex());
+        if (unionIndex313 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, null);
+        } else {
+            if (unionIndex313 == 1) {
+                Utf8 charSequence313;
+                Object oldString313 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(313);
+                if (oldString313 instanceof Utf8) {
+                    charSequence313 = (decoder).readString(((Utf8) oldString313));
+                } else {
+                    charSequence313 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, charSequence313);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F313': "+ unionIndex313));
+            }
+        }
+        int unionIndex314 = (decoder.readIndex());
+        if (unionIndex314 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, null);
+        } else {
+            if (unionIndex314 == 1) {
+                Utf8 charSequence314;
+                Object oldString314 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(314);
+                if (oldString314 instanceof Utf8) {
+                    charSequence314 = (decoder).readString(((Utf8) oldString314));
+                } else {
+                    charSequence314 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, charSequence314);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F314': "+ unionIndex314));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex315 = (decoder.readIndex());
+        if (unionIndex315 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, null);
+        } else {
+            if (unionIndex315 == 1) {
+                Utf8 charSequence315;
+                Object oldString315 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(315);
+                if (oldString315 instanceof Utf8) {
+                    charSequence315 = (decoder).readString(((Utf8) oldString315));
+                } else {
+                    charSequence315 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, charSequence315);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F315': "+ unionIndex315));
+            }
+        }
+        int unionIndex316 = (decoder.readIndex());
+        if (unionIndex316 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, null);
+        } else {
+            if (unionIndex316 == 1) {
+                Utf8 charSequence316;
+                Object oldString316 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(316);
+                if (oldString316 instanceof Utf8) {
+                    charSequence316 = (decoder).readString(((Utf8) oldString316));
+                } else {
+                    charSequence316 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, charSequence316);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F316': "+ unionIndex316));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex317 = (decoder.readIndex());
+        if (unionIndex317 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, null);
+        } else {
+            if (unionIndex317 == 1) {
+                Utf8 charSequence317;
+                Object oldString317 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(317);
+                if (oldString317 instanceof Utf8) {
+                    charSequence317 = (decoder).readString(((Utf8) oldString317));
+                } else {
+                    charSequence317 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, charSequence317);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F317': "+ unionIndex317));
+            }
+        }
+        int unionIndex318 = (decoder.readIndex());
+        if (unionIndex318 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, null);
+        } else {
+            if (unionIndex318 == 1) {
+                Utf8 charSequence318;
+                Object oldString318 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(318);
+                if (oldString318 instanceof Utf8) {
+                    charSequence318 = (decoder).readString(((Utf8) oldString318));
+                } else {
+                    charSequence318 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, charSequence318);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F318': "+ unionIndex318));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex319 = (decoder.readIndex());
+        if (unionIndex319 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, null);
+        } else {
+            if (unionIndex319 == 1) {
+                Utf8 charSequence319;
+                Object oldString319 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(319);
+                if (oldString319 instanceof Utf8) {
+                    charSequence319 = (decoder).readString(((Utf8) oldString319));
+                } else {
+                    charSequence319 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, charSequence319);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F319': "+ unionIndex319));
+            }
+        }
+        int unionIndex320 = (decoder.readIndex());
+        if (unionIndex320 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, null);
+        } else {
+            if (unionIndex320 == 1) {
+                Utf8 charSequence320;
+                Object oldString320 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(320);
+                if (oldString320 instanceof Utf8) {
+                    charSequence320 = (decoder).readString(((Utf8) oldString320));
+                } else {
+                    charSequence320 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, charSequence320);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F320': "+ unionIndex320));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex321 = (decoder.readIndex());
+        if (unionIndex321 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, null);
+        } else {
+            if (unionIndex321 == 1) {
+                Utf8 charSequence321;
+                Object oldString321 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(321);
+                if (oldString321 instanceof Utf8) {
+                    charSequence321 = (decoder).readString(((Utf8) oldString321));
+                } else {
+                    charSequence321 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, charSequence321);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F321': "+ unionIndex321));
+            }
+        }
+        int unionIndex322 = (decoder.readIndex());
+        if (unionIndex322 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, null);
+        } else {
+            if (unionIndex322 == 1) {
+                Utf8 charSequence322;
+                Object oldString322 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(322);
+                if (oldString322 instanceof Utf8) {
+                    charSequence322 = (decoder).readString(((Utf8) oldString322));
+                } else {
+                    charSequence322 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, charSequence322);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F322': "+ unionIndex322));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex323 = (decoder.readIndex());
+        if (unionIndex323 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, null);
+        } else {
+            if (unionIndex323 == 1) {
+                Utf8 charSequence323;
+                Object oldString323 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(323);
+                if (oldString323 instanceof Utf8) {
+                    charSequence323 = (decoder).readString(((Utf8) oldString323));
+                } else {
+                    charSequence323 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, charSequence323);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F323': "+ unionIndex323));
+            }
+        }
+        int unionIndex324 = (decoder.readIndex());
+        if (unionIndex324 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, null);
+        } else {
+            if (unionIndex324 == 1) {
+                Utf8 charSequence324;
+                Object oldString324 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(324);
+                if (oldString324 instanceof Utf8) {
+                    charSequence324 = (decoder).readString(((Utf8) oldString324));
+                } else {
+                    charSequence324 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, charSequence324);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F324': "+ unionIndex324));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex325 = (decoder.readIndex());
+        if (unionIndex325 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, null);
+        } else {
+            if (unionIndex325 == 1) {
+                Utf8 charSequence325;
+                Object oldString325 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(325);
+                if (oldString325 instanceof Utf8) {
+                    charSequence325 = (decoder).readString(((Utf8) oldString325));
+                } else {
+                    charSequence325 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, charSequence325);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F325': "+ unionIndex325));
+            }
+        }
+        int unionIndex326 = (decoder.readIndex());
+        if (unionIndex326 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, null);
+        } else {
+            if (unionIndex326 == 1) {
+                Utf8 charSequence326;
+                Object oldString326 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(326);
+                if (oldString326 instanceof Utf8) {
+                    charSequence326 = (decoder).readString(((Utf8) oldString326));
+                } else {
+                    charSequence326 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, charSequence326);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F326': "+ unionIndex326));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex327 = (decoder.readIndex());
+        if (unionIndex327 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, null);
+        } else {
+            if (unionIndex327 == 1) {
+                Utf8 charSequence327;
+                Object oldString327 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(327);
+                if (oldString327 instanceof Utf8) {
+                    charSequence327 = (decoder).readString(((Utf8) oldString327));
+                } else {
+                    charSequence327 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, charSequence327);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F327': "+ unionIndex327));
+            }
+        }
+        int unionIndex328 = (decoder.readIndex());
+        if (unionIndex328 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, null);
+        } else {
+            if (unionIndex328 == 1) {
+                Utf8 charSequence328;
+                Object oldString328 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(328);
+                if (oldString328 instanceof Utf8) {
+                    charSequence328 = (decoder).readString(((Utf8) oldString328));
+                } else {
+                    charSequence328 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, charSequence328);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F328': "+ unionIndex328));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex329 = (decoder.readIndex());
+        if (unionIndex329 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, null);
+        } else {
+            if (unionIndex329 == 1) {
+                Utf8 charSequence329;
+                Object oldString329 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(329);
+                if (oldString329 instanceof Utf8) {
+                    charSequence329 = (decoder).readString(((Utf8) oldString329));
+                } else {
+                    charSequence329 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, charSequence329);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F329': "+ unionIndex329));
+            }
+        }
+        int unionIndex330 = (decoder.readIndex());
+        if (unionIndex330 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, null);
+        } else {
+            if (unionIndex330 == 1) {
+                Utf8 charSequence330;
+                Object oldString330 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(330);
+                if (oldString330 instanceof Utf8) {
+                    charSequence330 = (decoder).readString(((Utf8) oldString330));
+                } else {
+                    charSequence330 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, charSequence330);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F330': "+ unionIndex330));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex331 = (decoder.readIndex());
+        if (unionIndex331 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, null);
+        } else {
+            if (unionIndex331 == 1) {
+                Utf8 charSequence331;
+                Object oldString331 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(331);
+                if (oldString331 instanceof Utf8) {
+                    charSequence331 = (decoder).readString(((Utf8) oldString331));
+                } else {
+                    charSequence331 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, charSequence331);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F331': "+ unionIndex331));
+            }
+        }
+        int unionIndex332 = (decoder.readIndex());
+        if (unionIndex332 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, null);
+        } else {
+            if (unionIndex332 == 1) {
+                Utf8 charSequence332;
+                Object oldString332 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(332);
+                if (oldString332 instanceof Utf8) {
+                    charSequence332 = (decoder).readString(((Utf8) oldString332));
+                } else {
+                    charSequence332 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, charSequence332);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F332': "+ unionIndex332));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex333 = (decoder.readIndex());
+        if (unionIndex333 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, null);
+        } else {
+            if (unionIndex333 == 1) {
+                Utf8 charSequence333;
+                Object oldString333 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(333);
+                if (oldString333 instanceof Utf8) {
+                    charSequence333 = (decoder).readString(((Utf8) oldString333));
+                } else {
+                    charSequence333 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, charSequence333);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F333': "+ unionIndex333));
+            }
+        }
+        int unionIndex334 = (decoder.readIndex());
+        if (unionIndex334 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, null);
+        } else {
+            if (unionIndex334 == 1) {
+                Utf8 charSequence334;
+                Object oldString334 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(334);
+                if (oldString334 instanceof Utf8) {
+                    charSequence334 = (decoder).readString(((Utf8) oldString334));
+                } else {
+                    charSequence334 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, charSequence334);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F334': "+ unionIndex334));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex335 = (decoder.readIndex());
+        if (unionIndex335 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, null);
+        } else {
+            if (unionIndex335 == 1) {
+                Utf8 charSequence335;
+                Object oldString335 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(335);
+                if (oldString335 instanceof Utf8) {
+                    charSequence335 = (decoder).readString(((Utf8) oldString335));
+                } else {
+                    charSequence335 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, charSequence335);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F335': "+ unionIndex335));
+            }
+        }
+        int unionIndex336 = (decoder.readIndex());
+        if (unionIndex336 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, null);
+        } else {
+            if (unionIndex336 == 1) {
+                Utf8 charSequence336;
+                Object oldString336 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(336);
+                if (oldString336 instanceof Utf8) {
+                    charSequence336 = (decoder).readString(((Utf8) oldString336));
+                } else {
+                    charSequence336 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, charSequence336);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F336': "+ unionIndex336));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex337 = (decoder.readIndex());
+        if (unionIndex337 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, null);
+        } else {
+            if (unionIndex337 == 1) {
+                Utf8 charSequence337;
+                Object oldString337 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(337);
+                if (oldString337 instanceof Utf8) {
+                    charSequence337 = (decoder).readString(((Utf8) oldString337));
+                } else {
+                    charSequence337 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, charSequence337);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F337': "+ unionIndex337));
+            }
+        }
+        int unionIndex338 = (decoder.readIndex());
+        if (unionIndex338 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, null);
+        } else {
+            if (unionIndex338 == 1) {
+                Utf8 charSequence338;
+                Object oldString338 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(338);
+                if (oldString338 instanceof Utf8) {
+                    charSequence338 = (decoder).readString(((Utf8) oldString338));
+                } else {
+                    charSequence338 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, charSequence338);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F338': "+ unionIndex338));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex339 = (decoder.readIndex());
+        if (unionIndex339 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, null);
+        } else {
+            if (unionIndex339 == 1) {
+                Utf8 charSequence339;
+                Object oldString339 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(339);
+                if (oldString339 instanceof Utf8) {
+                    charSequence339 = (decoder).readString(((Utf8) oldString339));
+                } else {
+                    charSequence339 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, charSequence339);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F339': "+ unionIndex339));
+            }
+        }
+        int unionIndex340 = (decoder.readIndex());
+        if (unionIndex340 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, null);
+        } else {
+            if (unionIndex340 == 1) {
+                Utf8 charSequence340;
+                Object oldString340 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(340);
+                if (oldString340 instanceof Utf8) {
+                    charSequence340 = (decoder).readString(((Utf8) oldString340));
+                } else {
+                    charSequence340 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, charSequence340);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F340': "+ unionIndex340));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex341 = (decoder.readIndex());
+        if (unionIndex341 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, null);
+        } else {
+            if (unionIndex341 == 1) {
+                Utf8 charSequence341;
+                Object oldString341 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(341);
+                if (oldString341 instanceof Utf8) {
+                    charSequence341 = (decoder).readString(((Utf8) oldString341));
+                } else {
+                    charSequence341 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, charSequence341);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F341': "+ unionIndex341));
+            }
+        }
+        int unionIndex342 = (decoder.readIndex());
+        if (unionIndex342 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, null);
+        } else {
+            if (unionIndex342 == 1) {
+                Utf8 charSequence342;
+                Object oldString342 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(342);
+                if (oldString342 instanceof Utf8) {
+                    charSequence342 = (decoder).readString(((Utf8) oldString342));
+                } else {
+                    charSequence342 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, charSequence342);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F342': "+ unionIndex342));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex343 = (decoder.readIndex());
+        if (unionIndex343 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, null);
+        } else {
+            if (unionIndex343 == 1) {
+                Utf8 charSequence343;
+                Object oldString343 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(343);
+                if (oldString343 instanceof Utf8) {
+                    charSequence343 = (decoder).readString(((Utf8) oldString343));
+                } else {
+                    charSequence343 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, charSequence343);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F343': "+ unionIndex343));
+            }
+        }
+        int unionIndex344 = (decoder.readIndex());
+        if (unionIndex344 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, null);
+        } else {
+            if (unionIndex344 == 1) {
+                Utf8 charSequence344;
+                Object oldString344 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(344);
+                if (oldString344 instanceof Utf8) {
+                    charSequence344 = (decoder).readString(((Utf8) oldString344));
+                } else {
+                    charSequence344 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, charSequence344);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F344': "+ unionIndex344));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex345 = (decoder.readIndex());
+        if (unionIndex345 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, null);
+        } else {
+            if (unionIndex345 == 1) {
+                Utf8 charSequence345;
+                Object oldString345 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(345);
+                if (oldString345 instanceof Utf8) {
+                    charSequence345 = (decoder).readString(((Utf8) oldString345));
+                } else {
+                    charSequence345 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, charSequence345);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F345': "+ unionIndex345));
+            }
+        }
+        int unionIndex346 = (decoder.readIndex());
+        if (unionIndex346 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, null);
+        } else {
+            if (unionIndex346 == 1) {
+                Utf8 charSequence346;
+                Object oldString346 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(346);
+                if (oldString346 instanceof Utf8) {
+                    charSequence346 = (decoder).readString(((Utf8) oldString346));
+                } else {
+                    charSequence346 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, charSequence346);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F346': "+ unionIndex346));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex347 = (decoder.readIndex());
+        if (unionIndex347 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, null);
+        } else {
+            if (unionIndex347 == 1) {
+                Utf8 charSequence347;
+                Object oldString347 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(347);
+                if (oldString347 instanceof Utf8) {
+                    charSequence347 = (decoder).readString(((Utf8) oldString347));
+                } else {
+                    charSequence347 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, charSequence347);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F347': "+ unionIndex347));
+            }
+        }
+        int unionIndex348 = (decoder.readIndex());
+        if (unionIndex348 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, null);
+        } else {
+            if (unionIndex348 == 1) {
+                Utf8 charSequence348;
+                Object oldString348 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(348);
+                if (oldString348 instanceof Utf8) {
+                    charSequence348 = (decoder).readString(((Utf8) oldString348));
+                } else {
+                    charSequence348 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, charSequence348);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F348': "+ unionIndex348));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex349 = (decoder.readIndex());
+        if (unionIndex349 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, null);
+        } else {
+            if (unionIndex349 == 1) {
+                Utf8 charSequence349;
+                Object oldString349 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(349);
+                if (oldString349 instanceof Utf8) {
+                    charSequence349 = (decoder).readString(((Utf8) oldString349));
+                } else {
+                    charSequence349 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, charSequence349);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F349': "+ unionIndex349));
+            }
+        }
+        int unionIndex350 = (decoder.readIndex());
+        if (unionIndex350 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, null);
+        } else {
+            if (unionIndex350 == 1) {
+                Utf8 charSequence350;
+                Object oldString350 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(350);
+                if (oldString350 instanceof Utf8) {
+                    charSequence350 = (decoder).readString(((Utf8) oldString350));
+                } else {
+                    charSequence350 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, charSequence350);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F350': "+ unionIndex350));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex351 = (decoder.readIndex());
+        if (unionIndex351 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, null);
+        } else {
+            if (unionIndex351 == 1) {
+                Utf8 charSequence351;
+                Object oldString351 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(351);
+                if (oldString351 instanceof Utf8) {
+                    charSequence351 = (decoder).readString(((Utf8) oldString351));
+                } else {
+                    charSequence351 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, charSequence351);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F351': "+ unionIndex351));
+            }
+        }
+        int unionIndex352 = (decoder.readIndex());
+        if (unionIndex352 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, null);
+        } else {
+            if (unionIndex352 == 1) {
+                Utf8 charSequence352;
+                Object oldString352 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(352);
+                if (oldString352 instanceof Utf8) {
+                    charSequence352 = (decoder).readString(((Utf8) oldString352));
+                } else {
+                    charSequence352 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, charSequence352);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F352': "+ unionIndex352));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex353 = (decoder.readIndex());
+        if (unionIndex353 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, null);
+        } else {
+            if (unionIndex353 == 1) {
+                Utf8 charSequence353;
+                Object oldString353 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(353);
+                if (oldString353 instanceof Utf8) {
+                    charSequence353 = (decoder).readString(((Utf8) oldString353));
+                } else {
+                    charSequence353 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, charSequence353);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F353': "+ unionIndex353));
+            }
+        }
+        int unionIndex354 = (decoder.readIndex());
+        if (unionIndex354 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, null);
+        } else {
+            if (unionIndex354 == 1) {
+                Utf8 charSequence354;
+                Object oldString354 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(354);
+                if (oldString354 instanceof Utf8) {
+                    charSequence354 = (decoder).readString(((Utf8) oldString354));
+                } else {
+                    charSequence354 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, charSequence354);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F354': "+ unionIndex354));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex355 = (decoder.readIndex());
+        if (unionIndex355 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, null);
+        } else {
+            if (unionIndex355 == 1) {
+                Utf8 charSequence355;
+                Object oldString355 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(355);
+                if (oldString355 instanceof Utf8) {
+                    charSequence355 = (decoder).readString(((Utf8) oldString355));
+                } else {
+                    charSequence355 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, charSequence355);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F355': "+ unionIndex355));
+            }
+        }
+        int unionIndex356 = (decoder.readIndex());
+        if (unionIndex356 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, null);
+        } else {
+            if (unionIndex356 == 1) {
+                Utf8 charSequence356;
+                Object oldString356 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(356);
+                if (oldString356 instanceof Utf8) {
+                    charSequence356 = (decoder).readString(((Utf8) oldString356));
+                } else {
+                    charSequence356 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, charSequence356);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F356': "+ unionIndex356));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex357 = (decoder.readIndex());
+        if (unionIndex357 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, null);
+        } else {
+            if (unionIndex357 == 1) {
+                Utf8 charSequence357;
+                Object oldString357 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(357);
+                if (oldString357 instanceof Utf8) {
+                    charSequence357 = (decoder).readString(((Utf8) oldString357));
+                } else {
+                    charSequence357 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, charSequence357);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F357': "+ unionIndex357));
+            }
+        }
+        int unionIndex358 = (decoder.readIndex());
+        if (unionIndex358 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, null);
+        } else {
+            if (unionIndex358 == 1) {
+                Utf8 charSequence358;
+                Object oldString358 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(358);
+                if (oldString358 instanceof Utf8) {
+                    charSequence358 = (decoder).readString(((Utf8) oldString358));
+                } else {
+                    charSequence358 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, charSequence358);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F358': "+ unionIndex358));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex359 = (decoder.readIndex());
+        if (unionIndex359 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, null);
+        } else {
+            if (unionIndex359 == 1) {
+                Utf8 charSequence359;
+                Object oldString359 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(359);
+                if (oldString359 instanceof Utf8) {
+                    charSequence359 = (decoder).readString(((Utf8) oldString359));
+                } else {
+                    charSequence359 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, charSequence359);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F359': "+ unionIndex359));
+            }
+        }
+        int unionIndex360 = (decoder.readIndex());
+        if (unionIndex360 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, null);
+        } else {
+            if (unionIndex360 == 1) {
+                Utf8 charSequence360;
+                Object oldString360 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(360);
+                if (oldString360 instanceof Utf8) {
+                    charSequence360 = (decoder).readString(((Utf8) oldString360));
+                } else {
+                    charSequence360 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, charSequence360);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F360': "+ unionIndex360));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex361 = (decoder.readIndex());
+        if (unionIndex361 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, null);
+        } else {
+            if (unionIndex361 == 1) {
+                Utf8 charSequence361;
+                Object oldString361 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(361);
+                if (oldString361 instanceof Utf8) {
+                    charSequence361 = (decoder).readString(((Utf8) oldString361));
+                } else {
+                    charSequence361 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, charSequence361);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F361': "+ unionIndex361));
+            }
+        }
+        int unionIndex362 = (decoder.readIndex());
+        if (unionIndex362 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, null);
+        } else {
+            if (unionIndex362 == 1) {
+                Utf8 charSequence362;
+                Object oldString362 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(362);
+                if (oldString362 instanceof Utf8) {
+                    charSequence362 = (decoder).readString(((Utf8) oldString362));
+                } else {
+                    charSequence362 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, charSequence362);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F362': "+ unionIndex362));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex363 = (decoder.readIndex());
+        if (unionIndex363 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, null);
+        } else {
+            if (unionIndex363 == 1) {
+                Utf8 charSequence363;
+                Object oldString363 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(363);
+                if (oldString363 instanceof Utf8) {
+                    charSequence363 = (decoder).readString(((Utf8) oldString363));
+                } else {
+                    charSequence363 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, charSequence363);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F363': "+ unionIndex363));
+            }
+        }
+        int unionIndex364 = (decoder.readIndex());
+        if (unionIndex364 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, null);
+        } else {
+            if (unionIndex364 == 1) {
+                Utf8 charSequence364;
+                Object oldString364 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(364);
+                if (oldString364 instanceof Utf8) {
+                    charSequence364 = (decoder).readString(((Utf8) oldString364));
+                } else {
+                    charSequence364 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, charSequence364);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F364': "+ unionIndex364));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex365 = (decoder.readIndex());
+        if (unionIndex365 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, null);
+        } else {
+            if (unionIndex365 == 1) {
+                Utf8 charSequence365;
+                Object oldString365 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(365);
+                if (oldString365 instanceof Utf8) {
+                    charSequence365 = (decoder).readString(((Utf8) oldString365));
+                } else {
+                    charSequence365 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, charSequence365);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F365': "+ unionIndex365));
+            }
+        }
+        int unionIndex366 = (decoder.readIndex());
+        if (unionIndex366 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, null);
+        } else {
+            if (unionIndex366 == 1) {
+                Utf8 charSequence366;
+                Object oldString366 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(366);
+                if (oldString366 instanceof Utf8) {
+                    charSequence366 = (decoder).readString(((Utf8) oldString366));
+                } else {
+                    charSequence366 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, charSequence366);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F366': "+ unionIndex366));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex367 = (decoder.readIndex());
+        if (unionIndex367 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, null);
+        } else {
+            if (unionIndex367 == 1) {
+                Utf8 charSequence367;
+                Object oldString367 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(367);
+                if (oldString367 instanceof Utf8) {
+                    charSequence367 = (decoder).readString(((Utf8) oldString367));
+                } else {
+                    charSequence367 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, charSequence367);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F367': "+ unionIndex367));
+            }
+        }
+        int unionIndex368 = (decoder.readIndex());
+        if (unionIndex368 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, null);
+        } else {
+            if (unionIndex368 == 1) {
+                Utf8 charSequence368;
+                Object oldString368 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(368);
+                if (oldString368 instanceof Utf8) {
+                    charSequence368 = (decoder).readString(((Utf8) oldString368));
+                } else {
+                    charSequence368 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, charSequence368);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F368': "+ unionIndex368));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex369 = (decoder.readIndex());
+        if (unionIndex369 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, null);
+        } else {
+            if (unionIndex369 == 1) {
+                Utf8 charSequence369;
+                Object oldString369 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(369);
+                if (oldString369 instanceof Utf8) {
+                    charSequence369 = (decoder).readString(((Utf8) oldString369));
+                } else {
+                    charSequence369 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, charSequence369);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F369': "+ unionIndex369));
+            }
+        }
+        int unionIndex370 = (decoder.readIndex());
+        if (unionIndex370 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, null);
+        } else {
+            if (unionIndex370 == 1) {
+                Utf8 charSequence370;
+                Object oldString370 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(370);
+                if (oldString370 instanceof Utf8) {
+                    charSequence370 = (decoder).readString(((Utf8) oldString370));
+                } else {
+                    charSequence370 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, charSequence370);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F370': "+ unionIndex370));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex371 = (decoder.readIndex());
+        if (unionIndex371 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, null);
+        } else {
+            if (unionIndex371 == 1) {
+                Utf8 charSequence371;
+                Object oldString371 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(371);
+                if (oldString371 instanceof Utf8) {
+                    charSequence371 = (decoder).readString(((Utf8) oldString371));
+                } else {
+                    charSequence371 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, charSequence371);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F371': "+ unionIndex371));
+            }
+        }
+        int unionIndex372 = (decoder.readIndex());
+        if (unionIndex372 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, null);
+        } else {
+            if (unionIndex372 == 1) {
+                Utf8 charSequence372;
+                Object oldString372 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(372);
+                if (oldString372 instanceof Utf8) {
+                    charSequence372 = (decoder).readString(((Utf8) oldString372));
+                } else {
+                    charSequence372 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, charSequence372);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F372': "+ unionIndex372));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex373 = (decoder.readIndex());
+        if (unionIndex373 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, null);
+        } else {
+            if (unionIndex373 == 1) {
+                Utf8 charSequence373;
+                Object oldString373 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(373);
+                if (oldString373 instanceof Utf8) {
+                    charSequence373 = (decoder).readString(((Utf8) oldString373));
+                } else {
+                    charSequence373 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, charSequence373);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F373': "+ unionIndex373));
+            }
+        }
+        int unionIndex374 = (decoder.readIndex());
+        if (unionIndex374 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, null);
+        } else {
+            if (unionIndex374 == 1) {
+                Utf8 charSequence374;
+                Object oldString374 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(374);
+                if (oldString374 instanceof Utf8) {
+                    charSequence374 = (decoder).readString(((Utf8) oldString374));
+                } else {
+                    charSequence374 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, charSequence374);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F374': "+ unionIndex374));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex375 = (decoder.readIndex());
+        if (unionIndex375 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, null);
+        } else {
+            if (unionIndex375 == 1) {
+                Utf8 charSequence375;
+                Object oldString375 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(375);
+                if (oldString375 instanceof Utf8) {
+                    charSequence375 = (decoder).readString(((Utf8) oldString375));
+                } else {
+                    charSequence375 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, charSequence375);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F375': "+ unionIndex375));
+            }
+        }
+        int unionIndex376 = (decoder.readIndex());
+        if (unionIndex376 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, null);
+        } else {
+            if (unionIndex376 == 1) {
+                Utf8 charSequence376;
+                Object oldString376 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(376);
+                if (oldString376 instanceof Utf8) {
+                    charSequence376 = (decoder).readString(((Utf8) oldString376));
+                } else {
+                    charSequence376 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, charSequence376);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F376': "+ unionIndex376));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex377 = (decoder.readIndex());
+        if (unionIndex377 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, null);
+        } else {
+            if (unionIndex377 == 1) {
+                Utf8 charSequence377;
+                Object oldString377 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(377);
+                if (oldString377 instanceof Utf8) {
+                    charSequence377 = (decoder).readString(((Utf8) oldString377));
+                } else {
+                    charSequence377 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, charSequence377);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F377': "+ unionIndex377));
+            }
+        }
+        int unionIndex378 = (decoder.readIndex());
+        if (unionIndex378 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, null);
+        } else {
+            if (unionIndex378 == 1) {
+                Utf8 charSequence378;
+                Object oldString378 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(378);
+                if (oldString378 instanceof Utf8) {
+                    charSequence378 = (decoder).readString(((Utf8) oldString378));
+                } else {
+                    charSequence378 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, charSequence378);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F378': "+ unionIndex378));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex379 = (decoder.readIndex());
+        if (unionIndex379 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, null);
+        } else {
+            if (unionIndex379 == 1) {
+                Utf8 charSequence379;
+                Object oldString379 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(379);
+                if (oldString379 instanceof Utf8) {
+                    charSequence379 = (decoder).readString(((Utf8) oldString379));
+                } else {
+                    charSequence379 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, charSequence379);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F379': "+ unionIndex379));
+            }
+        }
+        int unionIndex380 = (decoder.readIndex());
+        if (unionIndex380 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, null);
+        } else {
+            if (unionIndex380 == 1) {
+                Utf8 charSequence380;
+                Object oldString380 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(380);
+                if (oldString380 instanceof Utf8) {
+                    charSequence380 = (decoder).readString(((Utf8) oldString380));
+                } else {
+                    charSequence380 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, charSequence380);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F380': "+ unionIndex380));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex381 = (decoder.readIndex());
+        if (unionIndex381 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, null);
+        } else {
+            if (unionIndex381 == 1) {
+                Utf8 charSequence381;
+                Object oldString381 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(381);
+                if (oldString381 instanceof Utf8) {
+                    charSequence381 = (decoder).readString(((Utf8) oldString381));
+                } else {
+                    charSequence381 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, charSequence381);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F381': "+ unionIndex381));
+            }
+        }
+        int unionIndex382 = (decoder.readIndex());
+        if (unionIndex382 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, null);
+        } else {
+            if (unionIndex382 == 1) {
+                Utf8 charSequence382;
+                Object oldString382 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(382);
+                if (oldString382 instanceof Utf8) {
+                    charSequence382 = (decoder).readString(((Utf8) oldString382));
+                } else {
+                    charSequence382 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, charSequence382);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F382': "+ unionIndex382));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex383 = (decoder.readIndex());
+        if (unionIndex383 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, null);
+        } else {
+            if (unionIndex383 == 1) {
+                Utf8 charSequence383;
+                Object oldString383 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(383);
+                if (oldString383 instanceof Utf8) {
+                    charSequence383 = (decoder).readString(((Utf8) oldString383));
+                } else {
+                    charSequence383 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, charSequence383);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F383': "+ unionIndex383));
+            }
+        }
+        int unionIndex384 = (decoder.readIndex());
+        if (unionIndex384 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, null);
+        } else {
+            if (unionIndex384 == 1) {
+                Utf8 charSequence384;
+                Object oldString384 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(384);
+                if (oldString384 instanceof Utf8) {
+                    charSequence384 = (decoder).readString(((Utf8) oldString384));
+                } else {
+                    charSequence384 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, charSequence384);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F384': "+ unionIndex384));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex385 = (decoder.readIndex());
+        if (unionIndex385 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, null);
+        } else {
+            if (unionIndex385 == 1) {
+                Utf8 charSequence385;
+                Object oldString385 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(385);
+                if (oldString385 instanceof Utf8) {
+                    charSequence385 = (decoder).readString(((Utf8) oldString385));
+                } else {
+                    charSequence385 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, charSequence385);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F385': "+ unionIndex385));
+            }
+        }
+        int unionIndex386 = (decoder.readIndex());
+        if (unionIndex386 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, null);
+        } else {
+            if (unionIndex386 == 1) {
+                Utf8 charSequence386;
+                Object oldString386 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(386);
+                if (oldString386 instanceof Utf8) {
+                    charSequence386 = (decoder).readString(((Utf8) oldString386));
+                } else {
+                    charSequence386 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, charSequence386);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F386': "+ unionIndex386));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex387 = (decoder.readIndex());
+        if (unionIndex387 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, null);
+        } else {
+            if (unionIndex387 == 1) {
+                Utf8 charSequence387;
+                Object oldString387 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(387);
+                if (oldString387 instanceof Utf8) {
+                    charSequence387 = (decoder).readString(((Utf8) oldString387));
+                } else {
+                    charSequence387 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, charSequence387);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F387': "+ unionIndex387));
+            }
+        }
+        int unionIndex388 = (decoder.readIndex());
+        if (unionIndex388 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, null);
+        } else {
+            if (unionIndex388 == 1) {
+                Utf8 charSequence388;
+                Object oldString388 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(388);
+                if (oldString388 instanceof Utf8) {
+                    charSequence388 = (decoder).readString(((Utf8) oldString388));
+                } else {
+                    charSequence388 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, charSequence388);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F388': "+ unionIndex388));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex389 = (decoder.readIndex());
+        if (unionIndex389 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, null);
+        } else {
+            if (unionIndex389 == 1) {
+                Utf8 charSequence389;
+                Object oldString389 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(389);
+                if (oldString389 instanceof Utf8) {
+                    charSequence389 = (decoder).readString(((Utf8) oldString389));
+                } else {
+                    charSequence389 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, charSequence389);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F389': "+ unionIndex389));
+            }
+        }
+        int unionIndex390 = (decoder.readIndex());
+        if (unionIndex390 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, null);
+        } else {
+            if (unionIndex390 == 1) {
+                Utf8 charSequence390;
+                Object oldString390 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(390);
+                if (oldString390 instanceof Utf8) {
+                    charSequence390 = (decoder).readString(((Utf8) oldString390));
+                } else {
+                    charSequence390 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, charSequence390);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F390': "+ unionIndex390));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex391 = (decoder.readIndex());
+        if (unionIndex391 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, null);
+        } else {
+            if (unionIndex391 == 1) {
+                Utf8 charSequence391;
+                Object oldString391 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(391);
+                if (oldString391 instanceof Utf8) {
+                    charSequence391 = (decoder).readString(((Utf8) oldString391));
+                } else {
+                    charSequence391 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, charSequence391);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F391': "+ unionIndex391));
+            }
+        }
+        int unionIndex392 = (decoder.readIndex());
+        if (unionIndex392 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, null);
+        } else {
+            if (unionIndex392 == 1) {
+                Utf8 charSequence392;
+                Object oldString392 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(392);
+                if (oldString392 instanceof Utf8) {
+                    charSequence392 = (decoder).readString(((Utf8) oldString392));
+                } else {
+                    charSequence392 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, charSequence392);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F392': "+ unionIndex392));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex393 = (decoder.readIndex());
+        if (unionIndex393 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, null);
+        } else {
+            if (unionIndex393 == 1) {
+                Utf8 charSequence393;
+                Object oldString393 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(393);
+                if (oldString393 instanceof Utf8) {
+                    charSequence393 = (decoder).readString(((Utf8) oldString393));
+                } else {
+                    charSequence393 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, charSequence393);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F393': "+ unionIndex393));
+            }
+        }
+        int unionIndex394 = (decoder.readIndex());
+        if (unionIndex394 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, null);
+        } else {
+            if (unionIndex394 == 1) {
+                Utf8 charSequence394;
+                Object oldString394 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(394);
+                if (oldString394 instanceof Utf8) {
+                    charSequence394 = (decoder).readString(((Utf8) oldString394));
+                } else {
+                    charSequence394 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, charSequence394);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F394': "+ unionIndex394));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex395 = (decoder.readIndex());
+        if (unionIndex395 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, null);
+        } else {
+            if (unionIndex395 == 1) {
+                Utf8 charSequence395;
+                Object oldString395 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(395);
+                if (oldString395 instanceof Utf8) {
+                    charSequence395 = (decoder).readString(((Utf8) oldString395));
+                } else {
+                    charSequence395 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, charSequence395);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F395': "+ unionIndex395));
+            }
+        }
+        int unionIndex396 = (decoder.readIndex());
+        if (unionIndex396 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, null);
+        } else {
+            if (unionIndex396 == 1) {
+                Utf8 charSequence396;
+                Object oldString396 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(396);
+                if (oldString396 instanceof Utf8) {
+                    charSequence396 = (decoder).readString(((Utf8) oldString396));
+                } else {
+                    charSequence396 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, charSequence396);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F396': "+ unionIndex396));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex397 = (decoder.readIndex());
+        if (unionIndex397 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, null);
+        } else {
+            if (unionIndex397 == 1) {
+                Utf8 charSequence397;
+                Object oldString397 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(397);
+                if (oldString397 instanceof Utf8) {
+                    charSequence397 = (decoder).readString(((Utf8) oldString397));
+                } else {
+                    charSequence397 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, charSequence397);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F397': "+ unionIndex397));
+            }
+        }
+        int unionIndex398 = (decoder.readIndex());
+        if (unionIndex398 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, null);
+        } else {
+            if (unionIndex398 == 1) {
+                Utf8 charSequence398;
+                Object oldString398 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(398);
+                if (oldString398 instanceof Utf8) {
+                    charSequence398 = (decoder).readString(((Utf8) oldString398));
+                } else {
+                    charSequence398 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, charSequence398);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F398': "+ unionIndex398));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex399 = (decoder.readIndex());
+        if (unionIndex399 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, null);
+        } else {
+            if (unionIndex399 == 1) {
+                Utf8 charSequence399;
+                Object oldString399 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(399);
+                if (oldString399 instanceof Utf8) {
+                    charSequence399 = (decoder).readString(((Utf8) oldString399));
+                } else {
+                    charSequence399 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, charSequence399);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F399': "+ unionIndex399));
+            }
+        }
+        int unionIndex400 = (decoder.readIndex());
+        if (unionIndex400 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, null);
+        } else {
+            if (unionIndex400 == 1) {
+                Utf8 charSequence400;
+                Object oldString400 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(400);
+                if (oldString400 instanceof Utf8) {
+                    charSequence400 = (decoder).readString(((Utf8) oldString400));
+                } else {
+                    charSequence400 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, charSequence400);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F400': "+ unionIndex400));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex401 = (decoder.readIndex());
+        if (unionIndex401 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, null);
+        } else {
+            if (unionIndex401 == 1) {
+                Utf8 charSequence401;
+                Object oldString401 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(401);
+                if (oldString401 instanceof Utf8) {
+                    charSequence401 = (decoder).readString(((Utf8) oldString401));
+                } else {
+                    charSequence401 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, charSequence401);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F401': "+ unionIndex401));
+            }
+        }
+        int unionIndex402 = (decoder.readIndex());
+        if (unionIndex402 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, null);
+        } else {
+            if (unionIndex402 == 1) {
+                Utf8 charSequence402;
+                Object oldString402 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(402);
+                if (oldString402 instanceof Utf8) {
+                    charSequence402 = (decoder).readString(((Utf8) oldString402));
+                } else {
+                    charSequence402 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, charSequence402);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F402': "+ unionIndex402));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex403 = (decoder.readIndex());
+        if (unionIndex403 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, null);
+        } else {
+            if (unionIndex403 == 1) {
+                Utf8 charSequence403;
+                Object oldString403 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(403);
+                if (oldString403 instanceof Utf8) {
+                    charSequence403 = (decoder).readString(((Utf8) oldString403));
+                } else {
+                    charSequence403 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, charSequence403);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F403': "+ unionIndex403));
+            }
+        }
+        int unionIndex404 = (decoder.readIndex());
+        if (unionIndex404 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, null);
+        } else {
+            if (unionIndex404 == 1) {
+                Utf8 charSequence404;
+                Object oldString404 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(404);
+                if (oldString404 instanceof Utf8) {
+                    charSequence404 = (decoder).readString(((Utf8) oldString404));
+                } else {
+                    charSequence404 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, charSequence404);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F404': "+ unionIndex404));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex405 = (decoder.readIndex());
+        if (unionIndex405 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, null);
+        } else {
+            if (unionIndex405 == 1) {
+                Utf8 charSequence405;
+                Object oldString405 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(405);
+                if (oldString405 instanceof Utf8) {
+                    charSequence405 = (decoder).readString(((Utf8) oldString405));
+                } else {
+                    charSequence405 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, charSequence405);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F405': "+ unionIndex405));
+            }
+        }
+        int unionIndex406 = (decoder.readIndex());
+        if (unionIndex406 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, null);
+        } else {
+            if (unionIndex406 == 1) {
+                Utf8 charSequence406;
+                Object oldString406 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(406);
+                if (oldString406 instanceof Utf8) {
+                    charSequence406 = (decoder).readString(((Utf8) oldString406));
+                } else {
+                    charSequence406 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, charSequence406);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F406': "+ unionIndex406));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex407 = (decoder.readIndex());
+        if (unionIndex407 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, null);
+        } else {
+            if (unionIndex407 == 1) {
+                Utf8 charSequence407;
+                Object oldString407 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(407);
+                if (oldString407 instanceof Utf8) {
+                    charSequence407 = (decoder).readString(((Utf8) oldString407));
+                } else {
+                    charSequence407 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, charSequence407);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F407': "+ unionIndex407));
+            }
+        }
+        int unionIndex408 = (decoder.readIndex());
+        if (unionIndex408 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, null);
+        } else {
+            if (unionIndex408 == 1) {
+                Utf8 charSequence408;
+                Object oldString408 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(408);
+                if (oldString408 instanceof Utf8) {
+                    charSequence408 = (decoder).readString(((Utf8) oldString408));
+                } else {
+                    charSequence408 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, charSequence408);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F408': "+ unionIndex408));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex409 = (decoder.readIndex());
+        if (unionIndex409 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, null);
+        } else {
+            if (unionIndex409 == 1) {
+                Utf8 charSequence409;
+                Object oldString409 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(409);
+                if (oldString409 instanceof Utf8) {
+                    charSequence409 = (decoder).readString(((Utf8) oldString409));
+                } else {
+                    charSequence409 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, charSequence409);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F409': "+ unionIndex409));
+            }
+        }
+        int unionIndex410 = (decoder.readIndex());
+        if (unionIndex410 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, null);
+        } else {
+            if (unionIndex410 == 1) {
+                Utf8 charSequence410;
+                Object oldString410 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(410);
+                if (oldString410 instanceof Utf8) {
+                    charSequence410 = (decoder).readString(((Utf8) oldString410));
+                } else {
+                    charSequence410 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, charSequence410);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F410': "+ unionIndex410));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex411 = (decoder.readIndex());
+        if (unionIndex411 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, null);
+        } else {
+            if (unionIndex411 == 1) {
+                Utf8 charSequence411;
+                Object oldString411 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(411);
+                if (oldString411 instanceof Utf8) {
+                    charSequence411 = (decoder).readString(((Utf8) oldString411));
+                } else {
+                    charSequence411 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, charSequence411);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F411': "+ unionIndex411));
+            }
+        }
+        int unionIndex412 = (decoder.readIndex());
+        if (unionIndex412 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, null);
+        } else {
+            if (unionIndex412 == 1) {
+                Utf8 charSequence412;
+                Object oldString412 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(412);
+                if (oldString412 instanceof Utf8) {
+                    charSequence412 = (decoder).readString(((Utf8) oldString412));
+                } else {
+                    charSequence412 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, charSequence412);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F412': "+ unionIndex412));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex413 = (decoder.readIndex());
+        if (unionIndex413 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, null);
+        } else {
+            if (unionIndex413 == 1) {
+                Utf8 charSequence413;
+                Object oldString413 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(413);
+                if (oldString413 instanceof Utf8) {
+                    charSequence413 = (decoder).readString(((Utf8) oldString413));
+                } else {
+                    charSequence413 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, charSequence413);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F413': "+ unionIndex413));
+            }
+        }
+        int unionIndex414 = (decoder.readIndex());
+        if (unionIndex414 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, null);
+        } else {
+            if (unionIndex414 == 1) {
+                Utf8 charSequence414;
+                Object oldString414 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(414);
+                if (oldString414 instanceof Utf8) {
+                    charSequence414 = (decoder).readString(((Utf8) oldString414));
+                } else {
+                    charSequence414 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, charSequence414);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F414': "+ unionIndex414));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex415 = (decoder.readIndex());
+        if (unionIndex415 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, null);
+        } else {
+            if (unionIndex415 == 1) {
+                Utf8 charSequence415;
+                Object oldString415 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(415);
+                if (oldString415 instanceof Utf8) {
+                    charSequence415 = (decoder).readString(((Utf8) oldString415));
+                } else {
+                    charSequence415 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, charSequence415);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F415': "+ unionIndex415));
+            }
+        }
+        int unionIndex416 = (decoder.readIndex());
+        if (unionIndex416 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, null);
+        } else {
+            if (unionIndex416 == 1) {
+                Utf8 charSequence416;
+                Object oldString416 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(416);
+                if (oldString416 instanceof Utf8) {
+                    charSequence416 = (decoder).readString(((Utf8) oldString416));
+                } else {
+                    charSequence416 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, charSequence416);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F416': "+ unionIndex416));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex417 = (decoder.readIndex());
+        if (unionIndex417 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, null);
+        } else {
+            if (unionIndex417 == 1) {
+                Utf8 charSequence417;
+                Object oldString417 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(417);
+                if (oldString417 instanceof Utf8) {
+                    charSequence417 = (decoder).readString(((Utf8) oldString417));
+                } else {
+                    charSequence417 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, charSequence417);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F417': "+ unionIndex417));
+            }
+        }
+        int unionIndex418 = (decoder.readIndex());
+        if (unionIndex418 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, null);
+        } else {
+            if (unionIndex418 == 1) {
+                Utf8 charSequence418;
+                Object oldString418 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(418);
+                if (oldString418 instanceof Utf8) {
+                    charSequence418 = (decoder).readString(((Utf8) oldString418));
+                } else {
+                    charSequence418 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, charSequence418);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F418': "+ unionIndex418));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex419 = (decoder.readIndex());
+        if (unionIndex419 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, null);
+        } else {
+            if (unionIndex419 == 1) {
+                Utf8 charSequence419;
+                Object oldString419 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(419);
+                if (oldString419 instanceof Utf8) {
+                    charSequence419 = (decoder).readString(((Utf8) oldString419));
+                } else {
+                    charSequence419 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, charSequence419);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F419': "+ unionIndex419));
+            }
+        }
+        int unionIndex420 = (decoder.readIndex());
+        if (unionIndex420 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, null);
+        } else {
+            if (unionIndex420 == 1) {
+                Utf8 charSequence420;
+                Object oldString420 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(420);
+                if (oldString420 instanceof Utf8) {
+                    charSequence420 = (decoder).readString(((Utf8) oldString420));
+                } else {
+                    charSequence420 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, charSequence420);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F420': "+ unionIndex420));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex421 = (decoder.readIndex());
+        if (unionIndex421 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, null);
+        } else {
+            if (unionIndex421 == 1) {
+                Utf8 charSequence421;
+                Object oldString421 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(421);
+                if (oldString421 instanceof Utf8) {
+                    charSequence421 = (decoder).readString(((Utf8) oldString421));
+                } else {
+                    charSequence421 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, charSequence421);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F421': "+ unionIndex421));
+            }
+        }
+        int unionIndex422 = (decoder.readIndex());
+        if (unionIndex422 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, null);
+        } else {
+            if (unionIndex422 == 1) {
+                Utf8 charSequence422;
+                Object oldString422 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(422);
+                if (oldString422 instanceof Utf8) {
+                    charSequence422 = (decoder).readString(((Utf8) oldString422));
+                } else {
+                    charSequence422 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, charSequence422);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F422': "+ unionIndex422));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex423 = (decoder.readIndex());
+        if (unionIndex423 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, null);
+        } else {
+            if (unionIndex423 == 1) {
+                Utf8 charSequence423;
+                Object oldString423 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(423);
+                if (oldString423 instanceof Utf8) {
+                    charSequence423 = (decoder).readString(((Utf8) oldString423));
+                } else {
+                    charSequence423 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, charSequence423);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F423': "+ unionIndex423));
+            }
+        }
+        int unionIndex424 = (decoder.readIndex());
+        if (unionIndex424 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, null);
+        } else {
+            if (unionIndex424 == 1) {
+                Utf8 charSequence424;
+                Object oldString424 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(424);
+                if (oldString424 instanceof Utf8) {
+                    charSequence424 = (decoder).readString(((Utf8) oldString424));
+                } else {
+                    charSequence424 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, charSequence424);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F424': "+ unionIndex424));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex425 = (decoder.readIndex());
+        if (unionIndex425 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, null);
+        } else {
+            if (unionIndex425 == 1) {
+                Utf8 charSequence425;
+                Object oldString425 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(425);
+                if (oldString425 instanceof Utf8) {
+                    charSequence425 = (decoder).readString(((Utf8) oldString425));
+                } else {
+                    charSequence425 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, charSequence425);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F425': "+ unionIndex425));
+            }
+        }
+        int unionIndex426 = (decoder.readIndex());
+        if (unionIndex426 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, null);
+        } else {
+            if (unionIndex426 == 1) {
+                Utf8 charSequence426;
+                Object oldString426 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(426);
+                if (oldString426 instanceof Utf8) {
+                    charSequence426 = (decoder).readString(((Utf8) oldString426));
+                } else {
+                    charSequence426 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, charSequence426);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F426': "+ unionIndex426));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex427 = (decoder.readIndex());
+        if (unionIndex427 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, null);
+        } else {
+            if (unionIndex427 == 1) {
+                Utf8 charSequence427;
+                Object oldString427 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(427);
+                if (oldString427 instanceof Utf8) {
+                    charSequence427 = (decoder).readString(((Utf8) oldString427));
+                } else {
+                    charSequence427 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, charSequence427);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F427': "+ unionIndex427));
+            }
+        }
+        int unionIndex428 = (decoder.readIndex());
+        if (unionIndex428 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, null);
+        } else {
+            if (unionIndex428 == 1) {
+                Utf8 charSequence428;
+                Object oldString428 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(428);
+                if (oldString428 instanceof Utf8) {
+                    charSequence428 = (decoder).readString(((Utf8) oldString428));
+                } else {
+                    charSequence428 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, charSequence428);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F428': "+ unionIndex428));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex429 = (decoder.readIndex());
+        if (unionIndex429 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, null);
+        } else {
+            if (unionIndex429 == 1) {
+                Utf8 charSequence429;
+                Object oldString429 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(429);
+                if (oldString429 instanceof Utf8) {
+                    charSequence429 = (decoder).readString(((Utf8) oldString429));
+                } else {
+                    charSequence429 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, charSequence429);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F429': "+ unionIndex429));
+            }
+        }
+        int unionIndex430 = (decoder.readIndex());
+        if (unionIndex430 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, null);
+        } else {
+            if (unionIndex430 == 1) {
+                Utf8 charSequence430;
+                Object oldString430 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(430);
+                if (oldString430 instanceof Utf8) {
+                    charSequence430 = (decoder).readString(((Utf8) oldString430));
+                } else {
+                    charSequence430 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, charSequence430);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F430': "+ unionIndex430));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex431 = (decoder.readIndex());
+        if (unionIndex431 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, null);
+        } else {
+            if (unionIndex431 == 1) {
+                Utf8 charSequence431;
+                Object oldString431 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(431);
+                if (oldString431 instanceof Utf8) {
+                    charSequence431 = (decoder).readString(((Utf8) oldString431));
+                } else {
+                    charSequence431 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, charSequence431);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F431': "+ unionIndex431));
+            }
+        }
+        int unionIndex432 = (decoder.readIndex());
+        if (unionIndex432 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, null);
+        } else {
+            if (unionIndex432 == 1) {
+                Utf8 charSequence432;
+                Object oldString432 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(432);
+                if (oldString432 instanceof Utf8) {
+                    charSequence432 = (decoder).readString(((Utf8) oldString432));
+                } else {
+                    charSequence432 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, charSequence432);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F432': "+ unionIndex432));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex433 = (decoder.readIndex());
+        if (unionIndex433 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, null);
+        } else {
+            if (unionIndex433 == 1) {
+                Utf8 charSequence433;
+                Object oldString433 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(433);
+                if (oldString433 instanceof Utf8) {
+                    charSequence433 = (decoder).readString(((Utf8) oldString433));
+                } else {
+                    charSequence433 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, charSequence433);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F433': "+ unionIndex433));
+            }
+        }
+        int unionIndex434 = (decoder.readIndex());
+        if (unionIndex434 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, null);
+        } else {
+            if (unionIndex434 == 1) {
+                Utf8 charSequence434;
+                Object oldString434 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(434);
+                if (oldString434 instanceof Utf8) {
+                    charSequence434 = (decoder).readString(((Utf8) oldString434));
+                } else {
+                    charSequence434 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, charSequence434);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F434': "+ unionIndex434));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex435 = (decoder.readIndex());
+        if (unionIndex435 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, null);
+        } else {
+            if (unionIndex435 == 1) {
+                Utf8 charSequence435;
+                Object oldString435 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(435);
+                if (oldString435 instanceof Utf8) {
+                    charSequence435 = (decoder).readString(((Utf8) oldString435));
+                } else {
+                    charSequence435 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, charSequence435);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F435': "+ unionIndex435));
+            }
+        }
+        int unionIndex436 = (decoder.readIndex());
+        if (unionIndex436 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, null);
+        } else {
+            if (unionIndex436 == 1) {
+                Utf8 charSequence436;
+                Object oldString436 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(436);
+                if (oldString436 instanceof Utf8) {
+                    charSequence436 = (decoder).readString(((Utf8) oldString436));
+                } else {
+                    charSequence436 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, charSequence436);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F436': "+ unionIndex436));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex437 = (decoder.readIndex());
+        if (unionIndex437 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, null);
+        } else {
+            if (unionIndex437 == 1) {
+                Utf8 charSequence437;
+                Object oldString437 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(437);
+                if (oldString437 instanceof Utf8) {
+                    charSequence437 = (decoder).readString(((Utf8) oldString437));
+                } else {
+                    charSequence437 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, charSequence437);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F437': "+ unionIndex437));
+            }
+        }
+        int unionIndex438 = (decoder.readIndex());
+        if (unionIndex438 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, null);
+        } else {
+            if (unionIndex438 == 1) {
+                Utf8 charSequence438;
+                Object oldString438 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(438);
+                if (oldString438 instanceof Utf8) {
+                    charSequence438 = (decoder).readString(((Utf8) oldString438));
+                } else {
+                    charSequence438 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, charSequence438);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F438': "+ unionIndex438));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex439 = (decoder.readIndex());
+        if (unionIndex439 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, null);
+        } else {
+            if (unionIndex439 == 1) {
+                Utf8 charSequence439;
+                Object oldString439 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(439);
+                if (oldString439 instanceof Utf8) {
+                    charSequence439 = (decoder).readString(((Utf8) oldString439));
+                } else {
+                    charSequence439 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, charSequence439);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F439': "+ unionIndex439));
+            }
+        }
+        int unionIndex440 = (decoder.readIndex());
+        if (unionIndex440 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, null);
+        } else {
+            if (unionIndex440 == 1) {
+                Utf8 charSequence440;
+                Object oldString440 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(440);
+                if (oldString440 instanceof Utf8) {
+                    charSequence440 = (decoder).readString(((Utf8) oldString440));
+                } else {
+                    charSequence440 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, charSequence440);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F440': "+ unionIndex440));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex441 = (decoder.readIndex());
+        if (unionIndex441 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, null);
+        } else {
+            if (unionIndex441 == 1) {
+                Utf8 charSequence441;
+                Object oldString441 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(441);
+                if (oldString441 instanceof Utf8) {
+                    charSequence441 = (decoder).readString(((Utf8) oldString441));
+                } else {
+                    charSequence441 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, charSequence441);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F441': "+ unionIndex441));
+            }
+        }
+        int unionIndex442 = (decoder.readIndex());
+        if (unionIndex442 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, null);
+        } else {
+            if (unionIndex442 == 1) {
+                Utf8 charSequence442;
+                Object oldString442 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(442);
+                if (oldString442 instanceof Utf8) {
+                    charSequence442 = (decoder).readString(((Utf8) oldString442));
+                } else {
+                    charSequence442 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, charSequence442);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F442': "+ unionIndex442));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex443 = (decoder.readIndex());
+        if (unionIndex443 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, null);
+        } else {
+            if (unionIndex443 == 1) {
+                Utf8 charSequence443;
+                Object oldString443 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(443);
+                if (oldString443 instanceof Utf8) {
+                    charSequence443 = (decoder).readString(((Utf8) oldString443));
+                } else {
+                    charSequence443 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, charSequence443);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F443': "+ unionIndex443));
+            }
+        }
+        int unionIndex444 = (decoder.readIndex());
+        if (unionIndex444 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, null);
+        } else {
+            if (unionIndex444 == 1) {
+                Utf8 charSequence444;
+                Object oldString444 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(444);
+                if (oldString444 instanceof Utf8) {
+                    charSequence444 = (decoder).readString(((Utf8) oldString444));
+                } else {
+                    charSequence444 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, charSequence444);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F444': "+ unionIndex444));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex445 = (decoder.readIndex());
+        if (unionIndex445 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, null);
+        } else {
+            if (unionIndex445 == 1) {
+                Utf8 charSequence445;
+                Object oldString445 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(445);
+                if (oldString445 instanceof Utf8) {
+                    charSequence445 = (decoder).readString(((Utf8) oldString445));
+                } else {
+                    charSequence445 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, charSequence445);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F445': "+ unionIndex445));
+            }
+        }
+        int unionIndex446 = (decoder.readIndex());
+        if (unionIndex446 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, null);
+        } else {
+            if (unionIndex446 == 1) {
+                Utf8 charSequence446;
+                Object oldString446 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(446);
+                if (oldString446 instanceof Utf8) {
+                    charSequence446 = (decoder).readString(((Utf8) oldString446));
+                } else {
+                    charSequence446 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, charSequence446);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F446': "+ unionIndex446));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex447 = (decoder.readIndex());
+        if (unionIndex447 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, null);
+        } else {
+            if (unionIndex447 == 1) {
+                Utf8 charSequence447;
+                Object oldString447 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(447);
+                if (oldString447 instanceof Utf8) {
+                    charSequence447 = (decoder).readString(((Utf8) oldString447));
+                } else {
+                    charSequence447 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, charSequence447);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F447': "+ unionIndex447));
+            }
+        }
+        int unionIndex448 = (decoder.readIndex());
+        if (unionIndex448 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, null);
+        } else {
+            if (unionIndex448 == 1) {
+                Utf8 charSequence448;
+                Object oldString448 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(448);
+                if (oldString448 instanceof Utf8) {
+                    charSequence448 = (decoder).readString(((Utf8) oldString448));
+                } else {
+                    charSequence448 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, charSequence448);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F448': "+ unionIndex448));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex449 = (decoder.readIndex());
+        if (unionIndex449 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, null);
+        } else {
+            if (unionIndex449 == 1) {
+                Utf8 charSequence449;
+                Object oldString449 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(449);
+                if (oldString449 instanceof Utf8) {
+                    charSequence449 = (decoder).readString(((Utf8) oldString449));
+                } else {
+                    charSequence449 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, charSequence449);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F449': "+ unionIndex449));
+            }
+        }
+        int unionIndex450 = (decoder.readIndex());
+        if (unionIndex450 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, null);
+        } else {
+            if (unionIndex450 == 1) {
+                Utf8 charSequence450;
+                Object oldString450 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(450);
+                if (oldString450 instanceof Utf8) {
+                    charSequence450 = (decoder).readString(((Utf8) oldString450));
+                } else {
+                    charSequence450 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, charSequence450);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F450': "+ unionIndex450));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex451 = (decoder.readIndex());
+        if (unionIndex451 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, null);
+        } else {
+            if (unionIndex451 == 1) {
+                Utf8 charSequence451;
+                Object oldString451 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(451);
+                if (oldString451 instanceof Utf8) {
+                    charSequence451 = (decoder).readString(((Utf8) oldString451));
+                } else {
+                    charSequence451 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, charSequence451);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F451': "+ unionIndex451));
+            }
+        }
+        int unionIndex452 = (decoder.readIndex());
+        if (unionIndex452 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, null);
+        } else {
+            if (unionIndex452 == 1) {
+                Utf8 charSequence452;
+                Object oldString452 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(452);
+                if (oldString452 instanceof Utf8) {
+                    charSequence452 = (decoder).readString(((Utf8) oldString452));
+                } else {
+                    charSequence452 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, charSequence452);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F452': "+ unionIndex452));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex453 = (decoder.readIndex());
+        if (unionIndex453 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, null);
+        } else {
+            if (unionIndex453 == 1) {
+                Utf8 charSequence453;
+                Object oldString453 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(453);
+                if (oldString453 instanceof Utf8) {
+                    charSequence453 = (decoder).readString(((Utf8) oldString453));
+                } else {
+                    charSequence453 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, charSequence453);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F453': "+ unionIndex453));
+            }
+        }
+        int unionIndex454 = (decoder.readIndex());
+        if (unionIndex454 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, null);
+        } else {
+            if (unionIndex454 == 1) {
+                Utf8 charSequence454;
+                Object oldString454 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(454);
+                if (oldString454 instanceof Utf8) {
+                    charSequence454 = (decoder).readString(((Utf8) oldString454));
+                } else {
+                    charSequence454 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, charSequence454);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F454': "+ unionIndex454));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex455 = (decoder.readIndex());
+        if (unionIndex455 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, null);
+        } else {
+            if (unionIndex455 == 1) {
+                Utf8 charSequence455;
+                Object oldString455 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(455);
+                if (oldString455 instanceof Utf8) {
+                    charSequence455 = (decoder).readString(((Utf8) oldString455));
+                } else {
+                    charSequence455 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, charSequence455);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F455': "+ unionIndex455));
+            }
+        }
+        int unionIndex456 = (decoder.readIndex());
+        if (unionIndex456 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, null);
+        } else {
+            if (unionIndex456 == 1) {
+                Utf8 charSequence456;
+                Object oldString456 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(456);
+                if (oldString456 instanceof Utf8) {
+                    charSequence456 = (decoder).readString(((Utf8) oldString456));
+                } else {
+                    charSequence456 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, charSequence456);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F456': "+ unionIndex456));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex457 = (decoder.readIndex());
+        if (unionIndex457 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, null);
+        } else {
+            if (unionIndex457 == 1) {
+                Utf8 charSequence457;
+                Object oldString457 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(457);
+                if (oldString457 instanceof Utf8) {
+                    charSequence457 = (decoder).readString(((Utf8) oldString457));
+                } else {
+                    charSequence457 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, charSequence457);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F457': "+ unionIndex457));
+            }
+        }
+        int unionIndex458 = (decoder.readIndex());
+        if (unionIndex458 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, null);
+        } else {
+            if (unionIndex458 == 1) {
+                Utf8 charSequence458;
+                Object oldString458 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(458);
+                if (oldString458 instanceof Utf8) {
+                    charSequence458 = (decoder).readString(((Utf8) oldString458));
+                } else {
+                    charSequence458 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, charSequence458);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F458': "+ unionIndex458));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex459 = (decoder.readIndex());
+        if (unionIndex459 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, null);
+        } else {
+            if (unionIndex459 == 1) {
+                Utf8 charSequence459;
+                Object oldString459 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(459);
+                if (oldString459 instanceof Utf8) {
+                    charSequence459 = (decoder).readString(((Utf8) oldString459));
+                } else {
+                    charSequence459 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, charSequence459);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F459': "+ unionIndex459));
+            }
+        }
+        int unionIndex460 = (decoder.readIndex());
+        if (unionIndex460 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, null);
+        } else {
+            if (unionIndex460 == 1) {
+                Utf8 charSequence460;
+                Object oldString460 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(460);
+                if (oldString460 instanceof Utf8) {
+                    charSequence460 = (decoder).readString(((Utf8) oldString460));
+                } else {
+                    charSequence460 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, charSequence460);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F460': "+ unionIndex460));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex461 = (decoder.readIndex());
+        if (unionIndex461 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, null);
+        } else {
+            if (unionIndex461 == 1) {
+                Utf8 charSequence461;
+                Object oldString461 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(461);
+                if (oldString461 instanceof Utf8) {
+                    charSequence461 = (decoder).readString(((Utf8) oldString461));
+                } else {
+                    charSequence461 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, charSequence461);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F461': "+ unionIndex461));
+            }
+        }
+        int unionIndex462 = (decoder.readIndex());
+        if (unionIndex462 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, null);
+        } else {
+            if (unionIndex462 == 1) {
+                Utf8 charSequence462;
+                Object oldString462 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(462);
+                if (oldString462 instanceof Utf8) {
+                    charSequence462 = (decoder).readString(((Utf8) oldString462));
+                } else {
+                    charSequence462 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, charSequence462);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F462': "+ unionIndex462));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex463 = (decoder.readIndex());
+        if (unionIndex463 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, null);
+        } else {
+            if (unionIndex463 == 1) {
+                Utf8 charSequence463;
+                Object oldString463 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(463);
+                if (oldString463 instanceof Utf8) {
+                    charSequence463 = (decoder).readString(((Utf8) oldString463));
+                } else {
+                    charSequence463 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, charSequence463);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F463': "+ unionIndex463));
+            }
+        }
+        int unionIndex464 = (decoder.readIndex());
+        if (unionIndex464 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, null);
+        } else {
+            if (unionIndex464 == 1) {
+                Utf8 charSequence464;
+                Object oldString464 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(464);
+                if (oldString464 instanceof Utf8) {
+                    charSequence464 = (decoder).readString(((Utf8) oldString464));
+                } else {
+                    charSequence464 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, charSequence464);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F464': "+ unionIndex464));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex465 = (decoder.readIndex());
+        if (unionIndex465 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, null);
+        } else {
+            if (unionIndex465 == 1) {
+                Utf8 charSequence465;
+                Object oldString465 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(465);
+                if (oldString465 instanceof Utf8) {
+                    charSequence465 = (decoder).readString(((Utf8) oldString465));
+                } else {
+                    charSequence465 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, charSequence465);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F465': "+ unionIndex465));
+            }
+        }
+        int unionIndex466 = (decoder.readIndex());
+        if (unionIndex466 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, null);
+        } else {
+            if (unionIndex466 == 1) {
+                Utf8 charSequence466;
+                Object oldString466 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(466);
+                if (oldString466 instanceof Utf8) {
+                    charSequence466 = (decoder).readString(((Utf8) oldString466));
+                } else {
+                    charSequence466 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, charSequence466);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F466': "+ unionIndex466));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex467 = (decoder.readIndex());
+        if (unionIndex467 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, null);
+        } else {
+            if (unionIndex467 == 1) {
+                Utf8 charSequence467;
+                Object oldString467 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(467);
+                if (oldString467 instanceof Utf8) {
+                    charSequence467 = (decoder).readString(((Utf8) oldString467));
+                } else {
+                    charSequence467 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, charSequence467);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F467': "+ unionIndex467));
+            }
+        }
+        int unionIndex468 = (decoder.readIndex());
+        if (unionIndex468 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, null);
+        } else {
+            if (unionIndex468 == 1) {
+                Utf8 charSequence468;
+                Object oldString468 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(468);
+                if (oldString468 instanceof Utf8) {
+                    charSequence468 = (decoder).readString(((Utf8) oldString468));
+                } else {
+                    charSequence468 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, charSequence468);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F468': "+ unionIndex468));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex469 = (decoder.readIndex());
+        if (unionIndex469 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, null);
+        } else {
+            if (unionIndex469 == 1) {
+                Utf8 charSequence469;
+                Object oldString469 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(469);
+                if (oldString469 instanceof Utf8) {
+                    charSequence469 = (decoder).readString(((Utf8) oldString469));
+                } else {
+                    charSequence469 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, charSequence469);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F469': "+ unionIndex469));
+            }
+        }
+        int unionIndex470 = (decoder.readIndex());
+        if (unionIndex470 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, null);
+        } else {
+            if (unionIndex470 == 1) {
+                Utf8 charSequence470;
+                Object oldString470 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(470);
+                if (oldString470 instanceof Utf8) {
+                    charSequence470 = (decoder).readString(((Utf8) oldString470));
+                } else {
+                    charSequence470 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, charSequence470);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F470': "+ unionIndex470));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex471 = (decoder.readIndex());
+        if (unionIndex471 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, null);
+        } else {
+            if (unionIndex471 == 1) {
+                Utf8 charSequence471;
+                Object oldString471 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(471);
+                if (oldString471 instanceof Utf8) {
+                    charSequence471 = (decoder).readString(((Utf8) oldString471));
+                } else {
+                    charSequence471 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, charSequence471);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F471': "+ unionIndex471));
+            }
+        }
+        int unionIndex472 = (decoder.readIndex());
+        if (unionIndex472 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, null);
+        } else {
+            if (unionIndex472 == 1) {
+                Utf8 charSequence472;
+                Object oldString472 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(472);
+                if (oldString472 instanceof Utf8) {
+                    charSequence472 = (decoder).readString(((Utf8) oldString472));
+                } else {
+                    charSequence472 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, charSequence472);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F472': "+ unionIndex472));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex473 = (decoder.readIndex());
+        if (unionIndex473 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, null);
+        } else {
+            if (unionIndex473 == 1) {
+                Utf8 charSequence473;
+                Object oldString473 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(473);
+                if (oldString473 instanceof Utf8) {
+                    charSequence473 = (decoder).readString(((Utf8) oldString473));
+                } else {
+                    charSequence473 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, charSequence473);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F473': "+ unionIndex473));
+            }
+        }
+        int unionIndex474 = (decoder.readIndex());
+        if (unionIndex474 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, null);
+        } else {
+            if (unionIndex474 == 1) {
+                Utf8 charSequence474;
+                Object oldString474 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(474);
+                if (oldString474 instanceof Utf8) {
+                    charSequence474 = (decoder).readString(((Utf8) oldString474));
+                } else {
+                    charSequence474 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, charSequence474);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F474': "+ unionIndex474));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex475 = (decoder.readIndex());
+        if (unionIndex475 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, null);
+        } else {
+            if (unionIndex475 == 1) {
+                Utf8 charSequence475;
+                Object oldString475 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(475);
+                if (oldString475 instanceof Utf8) {
+                    charSequence475 = (decoder).readString(((Utf8) oldString475));
+                } else {
+                    charSequence475 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, charSequence475);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F475': "+ unionIndex475));
+            }
+        }
+        int unionIndex476 = (decoder.readIndex());
+        if (unionIndex476 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, null);
+        } else {
+            if (unionIndex476 == 1) {
+                Utf8 charSequence476;
+                Object oldString476 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(476);
+                if (oldString476 instanceof Utf8) {
+                    charSequence476 = (decoder).readString(((Utf8) oldString476));
+                } else {
+                    charSequence476 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, charSequence476);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F476': "+ unionIndex476));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex477 = (decoder.readIndex());
+        if (unionIndex477 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, null);
+        } else {
+            if (unionIndex477 == 1) {
+                Utf8 charSequence477;
+                Object oldString477 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(477);
+                if (oldString477 instanceof Utf8) {
+                    charSequence477 = (decoder).readString(((Utf8) oldString477));
+                } else {
+                    charSequence477 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, charSequence477);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F477': "+ unionIndex477));
+            }
+        }
+        int unionIndex478 = (decoder.readIndex());
+        if (unionIndex478 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, null);
+        } else {
+            if (unionIndex478 == 1) {
+                Utf8 charSequence478;
+                Object oldString478 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(478);
+                if (oldString478 instanceof Utf8) {
+                    charSequence478 = (decoder).readString(((Utf8) oldString478));
+                } else {
+                    charSequence478 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, charSequence478);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F478': "+ unionIndex478));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex479 = (decoder.readIndex());
+        if (unionIndex479 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, null);
+        } else {
+            if (unionIndex479 == 1) {
+                Utf8 charSequence479;
+                Object oldString479 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(479);
+                if (oldString479 instanceof Utf8) {
+                    charSequence479 = (decoder).readString(((Utf8) oldString479));
+                } else {
+                    charSequence479 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, charSequence479);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F479': "+ unionIndex479));
+            }
+        }
+        int unionIndex480 = (decoder.readIndex());
+        if (unionIndex480 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, null);
+        } else {
+            if (unionIndex480 == 1) {
+                Utf8 charSequence480;
+                Object oldString480 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(480);
+                if (oldString480 instanceof Utf8) {
+                    charSequence480 = (decoder).readString(((Utf8) oldString480));
+                } else {
+                    charSequence480 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, charSequence480);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F480': "+ unionIndex480));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex481 = (decoder.readIndex());
+        if (unionIndex481 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, null);
+        } else {
+            if (unionIndex481 == 1) {
+                Utf8 charSequence481;
+                Object oldString481 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(481);
+                if (oldString481 instanceof Utf8) {
+                    charSequence481 = (decoder).readString(((Utf8) oldString481));
+                } else {
+                    charSequence481 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, charSequence481);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F481': "+ unionIndex481));
+            }
+        }
+        int unionIndex482 = (decoder.readIndex());
+        if (unionIndex482 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, null);
+        } else {
+            if (unionIndex482 == 1) {
+                Utf8 charSequence482;
+                Object oldString482 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(482);
+                if (oldString482 instanceof Utf8) {
+                    charSequence482 = (decoder).readString(((Utf8) oldString482));
+                } else {
+                    charSequence482 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, charSequence482);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F482': "+ unionIndex482));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex483 = (decoder.readIndex());
+        if (unionIndex483 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, null);
+        } else {
+            if (unionIndex483 == 1) {
+                Utf8 charSequence483;
+                Object oldString483 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(483);
+                if (oldString483 instanceof Utf8) {
+                    charSequence483 = (decoder).readString(((Utf8) oldString483));
+                } else {
+                    charSequence483 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, charSequence483);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F483': "+ unionIndex483));
+            }
+        }
+        int unionIndex484 = (decoder.readIndex());
+        if (unionIndex484 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, null);
+        } else {
+            if (unionIndex484 == 1) {
+                Utf8 charSequence484;
+                Object oldString484 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(484);
+                if (oldString484 instanceof Utf8) {
+                    charSequence484 = (decoder).readString(((Utf8) oldString484));
+                } else {
+                    charSequence484 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, charSequence484);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F484': "+ unionIndex484));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex485 = (decoder.readIndex());
+        if (unionIndex485 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, null);
+        } else {
+            if (unionIndex485 == 1) {
+                Utf8 charSequence485;
+                Object oldString485 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(485);
+                if (oldString485 instanceof Utf8) {
+                    charSequence485 = (decoder).readString(((Utf8) oldString485));
+                } else {
+                    charSequence485 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, charSequence485);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F485': "+ unionIndex485));
+            }
+        }
+        int unionIndex486 = (decoder.readIndex());
+        if (unionIndex486 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, null);
+        } else {
+            if (unionIndex486 == 1) {
+                Utf8 charSequence486;
+                Object oldString486 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(486);
+                if (oldString486 instanceof Utf8) {
+                    charSequence486 = (decoder).readString(((Utf8) oldString486));
+                } else {
+                    charSequence486 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, charSequence486);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F486': "+ unionIndex486));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex487 = (decoder.readIndex());
+        if (unionIndex487 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, null);
+        } else {
+            if (unionIndex487 == 1) {
+                Utf8 charSequence487;
+                Object oldString487 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(487);
+                if (oldString487 instanceof Utf8) {
+                    charSequence487 = (decoder).readString(((Utf8) oldString487));
+                } else {
+                    charSequence487 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, charSequence487);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F487': "+ unionIndex487));
+            }
+        }
+        int unionIndex488 = (decoder.readIndex());
+        if (unionIndex488 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, null);
+        } else {
+            if (unionIndex488 == 1) {
+                Utf8 charSequence488;
+                Object oldString488 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(488);
+                if (oldString488 instanceof Utf8) {
+                    charSequence488 = (decoder).readString(((Utf8) oldString488));
+                } else {
+                    charSequence488 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, charSequence488);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F488': "+ unionIndex488));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex489 = (decoder.readIndex());
+        if (unionIndex489 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, null);
+        } else {
+            if (unionIndex489 == 1) {
+                Utf8 charSequence489;
+                Object oldString489 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(489);
+                if (oldString489 instanceof Utf8) {
+                    charSequence489 = (decoder).readString(((Utf8) oldString489));
+                } else {
+                    charSequence489 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, charSequence489);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F489': "+ unionIndex489));
+            }
+        }
+        int unionIndex490 = (decoder.readIndex());
+        if (unionIndex490 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, null);
+        } else {
+            if (unionIndex490 == 1) {
+                Utf8 charSequence490;
+                Object oldString490 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(490);
+                if (oldString490 instanceof Utf8) {
+                    charSequence490 = (decoder).readString(((Utf8) oldString490));
+                } else {
+                    charSequence490 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, charSequence490);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F490': "+ unionIndex490));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex491 = (decoder.readIndex());
+        if (unionIndex491 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, null);
+        } else {
+            if (unionIndex491 == 1) {
+                Utf8 charSequence491;
+                Object oldString491 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(491);
+                if (oldString491 instanceof Utf8) {
+                    charSequence491 = (decoder).readString(((Utf8) oldString491));
+                } else {
+                    charSequence491 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, charSequence491);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F491': "+ unionIndex491));
+            }
+        }
+        int unionIndex492 = (decoder.readIndex());
+        if (unionIndex492 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, null);
+        } else {
+            if (unionIndex492 == 1) {
+                Utf8 charSequence492;
+                Object oldString492 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(492);
+                if (oldString492 instanceof Utf8) {
+                    charSequence492 = (decoder).readString(((Utf8) oldString492));
+                } else {
+                    charSequence492 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, charSequence492);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F492': "+ unionIndex492));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex493 = (decoder.readIndex());
+        if (unionIndex493 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, null);
+        } else {
+            if (unionIndex493 == 1) {
+                Utf8 charSequence493;
+                Object oldString493 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(493);
+                if (oldString493 instanceof Utf8) {
+                    charSequence493 = (decoder).readString(((Utf8) oldString493));
+                } else {
+                    charSequence493 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, charSequence493);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F493': "+ unionIndex493));
+            }
+        }
+        int unionIndex494 = (decoder.readIndex());
+        if (unionIndex494 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, null);
+        } else {
+            if (unionIndex494 == 1) {
+                Utf8 charSequence494;
+                Object oldString494 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(494);
+                if (oldString494 instanceof Utf8) {
+                    charSequence494 = (decoder).readString(((Utf8) oldString494));
+                } else {
+                    charSequence494 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, charSequence494);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F494': "+ unionIndex494));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex495 = (decoder.readIndex());
+        if (unionIndex495 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, null);
+        } else {
+            if (unionIndex495 == 1) {
+                Utf8 charSequence495;
+                Object oldString495 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(495);
+                if (oldString495 instanceof Utf8) {
+                    charSequence495 = (decoder).readString(((Utf8) oldString495));
+                } else {
+                    charSequence495 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, charSequence495);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F495': "+ unionIndex495));
+            }
+        }
+        int unionIndex496 = (decoder.readIndex());
+        if (unionIndex496 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, null);
+        } else {
+            if (unionIndex496 == 1) {
+                Utf8 charSequence496;
+                Object oldString496 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(496);
+                if (oldString496 instanceof Utf8) {
+                    charSequence496 = (decoder).readString(((Utf8) oldString496));
+                } else {
+                    charSequence496 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, charSequence496);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F496': "+ unionIndex496));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex497 = (decoder.readIndex());
+        if (unionIndex497 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, null);
+        } else {
+            if (unionIndex497 == 1) {
+                Utf8 charSequence497;
+                Object oldString497 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(497);
+                if (oldString497 instanceof Utf8) {
+                    charSequence497 = (decoder).readString(((Utf8) oldString497));
+                } else {
+                    charSequence497 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, charSequence497);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F497': "+ unionIndex497));
+            }
+        }
+        int unionIndex498 = (decoder.readIndex());
+        if (unionIndex498 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, null);
+        } else {
+            if (unionIndex498 == 1) {
+                Utf8 charSequence498;
+                Object oldString498 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(498);
+                if (oldString498 instanceof Utf8) {
+                    charSequence498 = (decoder).readString(((Utf8) oldString498));
+                } else {
+                    charSequence498 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, charSequence498);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F498': "+ unionIndex498));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex499 = (decoder.readIndex());
+        if (unionIndex499 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, null);
+        } else {
+            if (unionIndex499 == 1) {
+                Utf8 charSequence499;
+                Object oldString499 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(499);
+                if (oldString499 instanceof Utf8) {
+                    charSequence499 = (decoder).readString(((Utf8) oldString499));
+                } else {
+                    charSequence499 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, charSequence499);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F499': "+ unionIndex499));
+            }
+        }
+        int unionIndex500 = (decoder.readIndex());
+        if (unionIndex500 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, null);
+        } else {
+            if (unionIndex500 == 1) {
+                Utf8 charSequence500;
+                Object oldString500 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(500);
+                if (oldString500 instanceof Utf8) {
+                    charSequence500 = (decoder).readString(((Utf8) oldString500));
+                } else {
+                    charSequence500 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, charSequence500);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F500': "+ unionIndex500));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex501 = (decoder.readIndex());
+        if (unionIndex501 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, null);
+        } else {
+            if (unionIndex501 == 1) {
+                Utf8 charSequence501;
+                Object oldString501 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(501);
+                if (oldString501 instanceof Utf8) {
+                    charSequence501 = (decoder).readString(((Utf8) oldString501));
+                } else {
+                    charSequence501 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, charSequence501);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F501': "+ unionIndex501));
+            }
+        }
+        int unionIndex502 = (decoder.readIndex());
+        if (unionIndex502 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, null);
+        } else {
+            if (unionIndex502 == 1) {
+                Utf8 charSequence502;
+                Object oldString502 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(502);
+                if (oldString502 instanceof Utf8) {
+                    charSequence502 = (decoder).readString(((Utf8) oldString502));
+                } else {
+                    charSequence502 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, charSequence502);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F502': "+ unionIndex502));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex503 = (decoder.readIndex());
+        if (unionIndex503 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, null);
+        } else {
+            if (unionIndex503 == 1) {
+                Utf8 charSequence503;
+                Object oldString503 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(503);
+                if (oldString503 instanceof Utf8) {
+                    charSequence503 = (decoder).readString(((Utf8) oldString503));
+                } else {
+                    charSequence503 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, charSequence503);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F503': "+ unionIndex503));
+            }
+        }
+        int unionIndex504 = (decoder.readIndex());
+        if (unionIndex504 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, null);
+        } else {
+            if (unionIndex504 == 1) {
+                Utf8 charSequence504;
+                Object oldString504 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(504);
+                if (oldString504 instanceof Utf8) {
+                    charSequence504 = (decoder).readString(((Utf8) oldString504));
+                } else {
+                    charSequence504 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, charSequence504);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F504': "+ unionIndex504));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex505 = (decoder.readIndex());
+        if (unionIndex505 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, null);
+        } else {
+            if (unionIndex505 == 1) {
+                Utf8 charSequence505;
+                Object oldString505 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(505);
+                if (oldString505 instanceof Utf8) {
+                    charSequence505 = (decoder).readString(((Utf8) oldString505));
+                } else {
+                    charSequence505 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, charSequence505);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F505': "+ unionIndex505));
+            }
+        }
+        int unionIndex506 = (decoder.readIndex());
+        if (unionIndex506 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, null);
+        } else {
+            if (unionIndex506 == 1) {
+                Utf8 charSequence506;
+                Object oldString506 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(506);
+                if (oldString506 instanceof Utf8) {
+                    charSequence506 = (decoder).readString(((Utf8) oldString506));
+                } else {
+                    charSequence506 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, charSequence506);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F506': "+ unionIndex506));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex507 = (decoder.readIndex());
+        if (unionIndex507 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, null);
+        } else {
+            if (unionIndex507 == 1) {
+                Utf8 charSequence507;
+                Object oldString507 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(507);
+                if (oldString507 instanceof Utf8) {
+                    charSequence507 = (decoder).readString(((Utf8) oldString507));
+                } else {
+                    charSequence507 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, charSequence507);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F507': "+ unionIndex507));
+            }
+        }
+        int unionIndex508 = (decoder.readIndex());
+        if (unionIndex508 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, null);
+        } else {
+            if (unionIndex508 == 1) {
+                Utf8 charSequence508;
+                Object oldString508 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(508);
+                if (oldString508 instanceof Utf8) {
+                    charSequence508 = (decoder).readString(((Utf8) oldString508));
+                } else {
+                    charSequence508 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, charSequence508);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F508': "+ unionIndex508));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex509 = (decoder.readIndex());
+        if (unionIndex509 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, null);
+        } else {
+            if (unionIndex509 == 1) {
+                Utf8 charSequence509;
+                Object oldString509 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(509);
+                if (oldString509 instanceof Utf8) {
+                    charSequence509 = (decoder).readString(((Utf8) oldString509));
+                } else {
+                    charSequence509 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, charSequence509);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F509': "+ unionIndex509));
+            }
+        }
+        int unionIndex510 = (decoder.readIndex());
+        if (unionIndex510 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, null);
+        } else {
+            if (unionIndex510 == 1) {
+                Utf8 charSequence510;
+                Object oldString510 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(510);
+                if (oldString510 instanceof Utf8) {
+                    charSequence510 = (decoder).readString(((Utf8) oldString510));
+                } else {
+                    charSequence510 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, charSequence510);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F510': "+ unionIndex510));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex511 = (decoder.readIndex());
+        if (unionIndex511 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, null);
+        } else {
+            if (unionIndex511 == 1) {
+                Utf8 charSequence511;
+                Object oldString511 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(511);
+                if (oldString511 instanceof Utf8) {
+                    charSequence511 = (decoder).readString(((Utf8) oldString511));
+                } else {
+                    charSequence511 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, charSequence511);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F511': "+ unionIndex511));
+            }
+        }
+        int unionIndex512 = (decoder.readIndex());
+        if (unionIndex512 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, null);
+        } else {
+            if (unionIndex512 == 1) {
+                Utf8 charSequence512;
+                Object oldString512 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(512);
+                if (oldString512 instanceof Utf8) {
+                    charSequence512 = (decoder).readString(((Utf8) oldString512));
+                } else {
+                    charSequence512 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, charSequence512);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F512': "+ unionIndex512));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex513 = (decoder.readIndex());
+        if (unionIndex513 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, null);
+        } else {
+            if (unionIndex513 == 1) {
+                Utf8 charSequence513;
+                Object oldString513 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(513);
+                if (oldString513 instanceof Utf8) {
+                    charSequence513 = (decoder).readString(((Utf8) oldString513));
+                } else {
+                    charSequence513 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, charSequence513);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F513': "+ unionIndex513));
+            }
+        }
+        int unionIndex514 = (decoder.readIndex());
+        if (unionIndex514 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, null);
+        } else {
+            if (unionIndex514 == 1) {
+                Utf8 charSequence514;
+                Object oldString514 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(514);
+                if (oldString514 instanceof Utf8) {
+                    charSequence514 = (decoder).readString(((Utf8) oldString514));
+                } else {
+                    charSequence514 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, charSequence514);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F514': "+ unionIndex514));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex515 = (decoder.readIndex());
+        if (unionIndex515 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, null);
+        } else {
+            if (unionIndex515 == 1) {
+                Utf8 charSequence515;
+                Object oldString515 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(515);
+                if (oldString515 instanceof Utf8) {
+                    charSequence515 = (decoder).readString(((Utf8) oldString515));
+                } else {
+                    charSequence515 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, charSequence515);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F515': "+ unionIndex515));
+            }
+        }
+        int unionIndex516 = (decoder.readIndex());
+        if (unionIndex516 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, null);
+        } else {
+            if (unionIndex516 == 1) {
+                Utf8 charSequence516;
+                Object oldString516 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(516);
+                if (oldString516 instanceof Utf8) {
+                    charSequence516 = (decoder).readString(((Utf8) oldString516));
+                } else {
+                    charSequence516 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, charSequence516);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F516': "+ unionIndex516));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex517 = (decoder.readIndex());
+        if (unionIndex517 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, null);
+        } else {
+            if (unionIndex517 == 1) {
+                Utf8 charSequence517;
+                Object oldString517 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(517);
+                if (oldString517 instanceof Utf8) {
+                    charSequence517 = (decoder).readString(((Utf8) oldString517));
+                } else {
+                    charSequence517 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, charSequence517);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F517': "+ unionIndex517));
+            }
+        }
+        int unionIndex518 = (decoder.readIndex());
+        if (unionIndex518 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, null);
+        } else {
+            if (unionIndex518 == 1) {
+                Utf8 charSequence518;
+                Object oldString518 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(518);
+                if (oldString518 instanceof Utf8) {
+                    charSequence518 = (decoder).readString(((Utf8) oldString518));
+                } else {
+                    charSequence518 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, charSequence518);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F518': "+ unionIndex518));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex519 = (decoder.readIndex());
+        if (unionIndex519 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, null);
+        } else {
+            if (unionIndex519 == 1) {
+                Utf8 charSequence519;
+                Object oldString519 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(519);
+                if (oldString519 instanceof Utf8) {
+                    charSequence519 = (decoder).readString(((Utf8) oldString519));
+                } else {
+                    charSequence519 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, charSequence519);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F519': "+ unionIndex519));
+            }
+        }
+        int unionIndex520 = (decoder.readIndex());
+        if (unionIndex520 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, null);
+        } else {
+            if (unionIndex520 == 1) {
+                Utf8 charSequence520;
+                Object oldString520 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(520);
+                if (oldString520 instanceof Utf8) {
+                    charSequence520 = (decoder).readString(((Utf8) oldString520));
+                } else {
+                    charSequence520 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, charSequence520);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F520': "+ unionIndex520));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex521 = (decoder.readIndex());
+        if (unionIndex521 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, null);
+        } else {
+            if (unionIndex521 == 1) {
+                Utf8 charSequence521;
+                Object oldString521 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(521);
+                if (oldString521 instanceof Utf8) {
+                    charSequence521 = (decoder).readString(((Utf8) oldString521));
+                } else {
+                    charSequence521 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, charSequence521);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F521': "+ unionIndex521));
+            }
+        }
+        int unionIndex522 = (decoder.readIndex());
+        if (unionIndex522 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, null);
+        } else {
+            if (unionIndex522 == 1) {
+                Utf8 charSequence522;
+                Object oldString522 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(522);
+                if (oldString522 instanceof Utf8) {
+                    charSequence522 = (decoder).readString(((Utf8) oldString522));
+                } else {
+                    charSequence522 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, charSequence522);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F522': "+ unionIndex522));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex523 = (decoder.readIndex());
+        if (unionIndex523 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, null);
+        } else {
+            if (unionIndex523 == 1) {
+                Utf8 charSequence523;
+                Object oldString523 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(523);
+                if (oldString523 instanceof Utf8) {
+                    charSequence523 = (decoder).readString(((Utf8) oldString523));
+                } else {
+                    charSequence523 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, charSequence523);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F523': "+ unionIndex523));
+            }
+        }
+        int unionIndex524 = (decoder.readIndex());
+        if (unionIndex524 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, null);
+        } else {
+            if (unionIndex524 == 1) {
+                Utf8 charSequence524;
+                Object oldString524 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(524);
+                if (oldString524 instanceof Utf8) {
+                    charSequence524 = (decoder).readString(((Utf8) oldString524));
+                } else {
+                    charSequence524 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, charSequence524);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F524': "+ unionIndex524));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex525 = (decoder.readIndex());
+        if (unionIndex525 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, null);
+        } else {
+            if (unionIndex525 == 1) {
+                Utf8 charSequence525;
+                Object oldString525 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(525);
+                if (oldString525 instanceof Utf8) {
+                    charSequence525 = (decoder).readString(((Utf8) oldString525));
+                } else {
+                    charSequence525 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, charSequence525);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F525': "+ unionIndex525));
+            }
+        }
+        int unionIndex526 = (decoder.readIndex());
+        if (unionIndex526 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, null);
+        } else {
+            if (unionIndex526 == 1) {
+                Utf8 charSequence526;
+                Object oldString526 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(526);
+                if (oldString526 instanceof Utf8) {
+                    charSequence526 = (decoder).readString(((Utf8) oldString526));
+                } else {
+                    charSequence526 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, charSequence526);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F526': "+ unionIndex526));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex527 = (decoder.readIndex());
+        if (unionIndex527 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, null);
+        } else {
+            if (unionIndex527 == 1) {
+                Utf8 charSequence527;
+                Object oldString527 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(527);
+                if (oldString527 instanceof Utf8) {
+                    charSequence527 = (decoder).readString(((Utf8) oldString527));
+                } else {
+                    charSequence527 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, charSequence527);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F527': "+ unionIndex527));
+            }
+        }
+        int unionIndex528 = (decoder.readIndex());
+        if (unionIndex528 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, null);
+        } else {
+            if (unionIndex528 == 1) {
+                Utf8 charSequence528;
+                Object oldString528 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(528);
+                if (oldString528 instanceof Utf8) {
+                    charSequence528 = (decoder).readString(((Utf8) oldString528));
+                } else {
+                    charSequence528 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, charSequence528);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F528': "+ unionIndex528));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex529 = (decoder.readIndex());
+        if (unionIndex529 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, null);
+        } else {
+            if (unionIndex529 == 1) {
+                Utf8 charSequence529;
+                Object oldString529 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(529);
+                if (oldString529 instanceof Utf8) {
+                    charSequence529 = (decoder).readString(((Utf8) oldString529));
+                } else {
+                    charSequence529 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, charSequence529);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F529': "+ unionIndex529));
+            }
+        }
+        int unionIndex530 = (decoder.readIndex());
+        if (unionIndex530 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, null);
+        } else {
+            if (unionIndex530 == 1) {
+                Utf8 charSequence530;
+                Object oldString530 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(530);
+                if (oldString530 instanceof Utf8) {
+                    charSequence530 = (decoder).readString(((Utf8) oldString530));
+                } else {
+                    charSequence530 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, charSequence530);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F530': "+ unionIndex530));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex531 = (decoder.readIndex());
+        if (unionIndex531 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, null);
+        } else {
+            if (unionIndex531 == 1) {
+                Utf8 charSequence531;
+                Object oldString531 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(531);
+                if (oldString531 instanceof Utf8) {
+                    charSequence531 = (decoder).readString(((Utf8) oldString531));
+                } else {
+                    charSequence531 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, charSequence531);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F531': "+ unionIndex531));
+            }
+        }
+        int unionIndex532 = (decoder.readIndex());
+        if (unionIndex532 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, null);
+        } else {
+            if (unionIndex532 == 1) {
+                Utf8 charSequence532;
+                Object oldString532 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(532);
+                if (oldString532 instanceof Utf8) {
+                    charSequence532 = (decoder).readString(((Utf8) oldString532));
+                } else {
+                    charSequence532 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, charSequence532);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F532': "+ unionIndex532));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex533 = (decoder.readIndex());
+        if (unionIndex533 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, null);
+        } else {
+            if (unionIndex533 == 1) {
+                Utf8 charSequence533;
+                Object oldString533 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(533);
+                if (oldString533 instanceof Utf8) {
+                    charSequence533 = (decoder).readString(((Utf8) oldString533));
+                } else {
+                    charSequence533 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, charSequence533);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F533': "+ unionIndex533));
+            }
+        }
+        int unionIndex534 = (decoder.readIndex());
+        if (unionIndex534 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, null);
+        } else {
+            if (unionIndex534 == 1) {
+                Utf8 charSequence534;
+                Object oldString534 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(534);
+                if (oldString534 instanceof Utf8) {
+                    charSequence534 = (decoder).readString(((Utf8) oldString534));
+                } else {
+                    charSequence534 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, charSequence534);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F534': "+ unionIndex534));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex535 = (decoder.readIndex());
+        if (unionIndex535 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, null);
+        } else {
+            if (unionIndex535 == 1) {
+                Utf8 charSequence535;
+                Object oldString535 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(535);
+                if (oldString535 instanceof Utf8) {
+                    charSequence535 = (decoder).readString(((Utf8) oldString535));
+                } else {
+                    charSequence535 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, charSequence535);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F535': "+ unionIndex535));
+            }
+        }
+        int unionIndex536 = (decoder.readIndex());
+        if (unionIndex536 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, null);
+        } else {
+            if (unionIndex536 == 1) {
+                Utf8 charSequence536;
+                Object oldString536 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(536);
+                if (oldString536 instanceof Utf8) {
+                    charSequence536 = (decoder).readString(((Utf8) oldString536));
+                } else {
+                    charSequence536 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, charSequence536);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F536': "+ unionIndex536));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex537 = (decoder.readIndex());
+        if (unionIndex537 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, null);
+        } else {
+            if (unionIndex537 == 1) {
+                Utf8 charSequence537;
+                Object oldString537 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(537);
+                if (oldString537 instanceof Utf8) {
+                    charSequence537 = (decoder).readString(((Utf8) oldString537));
+                } else {
+                    charSequence537 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, charSequence537);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F537': "+ unionIndex537));
+            }
+        }
+        int unionIndex538 = (decoder.readIndex());
+        if (unionIndex538 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, null);
+        } else {
+            if (unionIndex538 == 1) {
+                Utf8 charSequence538;
+                Object oldString538 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(538);
+                if (oldString538 instanceof Utf8) {
+                    charSequence538 = (decoder).readString(((Utf8) oldString538));
+                } else {
+                    charSequence538 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, charSequence538);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F538': "+ unionIndex538));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex539 = (decoder.readIndex());
+        if (unionIndex539 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, null);
+        } else {
+            if (unionIndex539 == 1) {
+                Utf8 charSequence539;
+                Object oldString539 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(539);
+                if (oldString539 instanceof Utf8) {
+                    charSequence539 = (decoder).readString(((Utf8) oldString539));
+                } else {
+                    charSequence539 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, charSequence539);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F539': "+ unionIndex539));
+            }
+        }
+        int unionIndex540 = (decoder.readIndex());
+        if (unionIndex540 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, null);
+        } else {
+            if (unionIndex540 == 1) {
+                Utf8 charSequence540;
+                Object oldString540 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(540);
+                if (oldString540 instanceof Utf8) {
+                    charSequence540 = (decoder).readString(((Utf8) oldString540));
+                } else {
+                    charSequence540 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, charSequence540);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F540': "+ unionIndex540));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex541 = (decoder.readIndex());
+        if (unionIndex541 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, null);
+        } else {
+            if (unionIndex541 == 1) {
+                Utf8 charSequence541;
+                Object oldString541 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(541);
+                if (oldString541 instanceof Utf8) {
+                    charSequence541 = (decoder).readString(((Utf8) oldString541));
+                } else {
+                    charSequence541 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, charSequence541);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F541': "+ unionIndex541));
+            }
+        }
+        int unionIndex542 = (decoder.readIndex());
+        if (unionIndex542 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, null);
+        } else {
+            if (unionIndex542 == 1) {
+                Utf8 charSequence542;
+                Object oldString542 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(542);
+                if (oldString542 instanceof Utf8) {
+                    charSequence542 = (decoder).readString(((Utf8) oldString542));
+                } else {
+                    charSequence542 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, charSequence542);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F542': "+ unionIndex542));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex543 = (decoder.readIndex());
+        if (unionIndex543 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, null);
+        } else {
+            if (unionIndex543 == 1) {
+                Utf8 charSequence543;
+                Object oldString543 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(543);
+                if (oldString543 instanceof Utf8) {
+                    charSequence543 = (decoder).readString(((Utf8) oldString543));
+                } else {
+                    charSequence543 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, charSequence543);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F543': "+ unionIndex543));
+            }
+        }
+        int unionIndex544 = (decoder.readIndex());
+        if (unionIndex544 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, null);
+        } else {
+            if (unionIndex544 == 1) {
+                Utf8 charSequence544;
+                Object oldString544 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(544);
+                if (oldString544 instanceof Utf8) {
+                    charSequence544 = (decoder).readString(((Utf8) oldString544));
+                } else {
+                    charSequence544 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, charSequence544);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F544': "+ unionIndex544));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex545 = (decoder.readIndex());
+        if (unionIndex545 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, null);
+        } else {
+            if (unionIndex545 == 1) {
+                Utf8 charSequence545;
+                Object oldString545 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(545);
+                if (oldString545 instanceof Utf8) {
+                    charSequence545 = (decoder).readString(((Utf8) oldString545));
+                } else {
+                    charSequence545 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, charSequence545);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F545': "+ unionIndex545));
+            }
+        }
+        int unionIndex546 = (decoder.readIndex());
+        if (unionIndex546 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, null);
+        } else {
+            if (unionIndex546 == 1) {
+                Utf8 charSequence546;
+                Object oldString546 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(546);
+                if (oldString546 instanceof Utf8) {
+                    charSequence546 = (decoder).readString(((Utf8) oldString546));
+                } else {
+                    charSequence546 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, charSequence546);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F546': "+ unionIndex546));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex547 = (decoder.readIndex());
+        if (unionIndex547 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, null);
+        } else {
+            if (unionIndex547 == 1) {
+                Utf8 charSequence547;
+                Object oldString547 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(547);
+                if (oldString547 instanceof Utf8) {
+                    charSequence547 = (decoder).readString(((Utf8) oldString547));
+                } else {
+                    charSequence547 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, charSequence547);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F547': "+ unionIndex547));
+            }
+        }
+        int unionIndex548 = (decoder.readIndex());
+        if (unionIndex548 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, null);
+        } else {
+            if (unionIndex548 == 1) {
+                Utf8 charSequence548;
+                Object oldString548 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(548);
+                if (oldString548 instanceof Utf8) {
+                    charSequence548 = (decoder).readString(((Utf8) oldString548));
+                } else {
+                    charSequence548 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, charSequence548);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F548': "+ unionIndex548));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex549 = (decoder.readIndex());
+        if (unionIndex549 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, null);
+        } else {
+            if (unionIndex549 == 1) {
+                Utf8 charSequence549;
+                Object oldString549 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(549);
+                if (oldString549 instanceof Utf8) {
+                    charSequence549 = (decoder).readString(((Utf8) oldString549));
+                } else {
+                    charSequence549 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, charSequence549);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F549': "+ unionIndex549));
+            }
+        }
+        int unionIndex550 = (decoder.readIndex());
+        if (unionIndex550 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, null);
+        } else {
+            if (unionIndex550 == 1) {
+                Utf8 charSequence550;
+                Object oldString550 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(550);
+                if (oldString550 instanceof Utf8) {
+                    charSequence550 = (decoder).readString(((Utf8) oldString550));
+                } else {
+                    charSequence550 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, charSequence550);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F550': "+ unionIndex550));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex551 = (decoder.readIndex());
+        if (unionIndex551 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, null);
+        } else {
+            if (unionIndex551 == 1) {
+                Utf8 charSequence551;
+                Object oldString551 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(551);
+                if (oldString551 instanceof Utf8) {
+                    charSequence551 = (decoder).readString(((Utf8) oldString551));
+                } else {
+                    charSequence551 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, charSequence551);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F551': "+ unionIndex551));
+            }
+        }
+        int unionIndex552 = (decoder.readIndex());
+        if (unionIndex552 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, null);
+        } else {
+            if (unionIndex552 == 1) {
+                Utf8 charSequence552;
+                Object oldString552 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(552);
+                if (oldString552 instanceof Utf8) {
+                    charSequence552 = (decoder).readString(((Utf8) oldString552));
+                } else {
+                    charSequence552 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, charSequence552);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F552': "+ unionIndex552));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex553 = (decoder.readIndex());
+        if (unionIndex553 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, null);
+        } else {
+            if (unionIndex553 == 1) {
+                Utf8 charSequence553;
+                Object oldString553 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(553);
+                if (oldString553 instanceof Utf8) {
+                    charSequence553 = (decoder).readString(((Utf8) oldString553));
+                } else {
+                    charSequence553 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, charSequence553);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F553': "+ unionIndex553));
+            }
+        }
+        int unionIndex554 = (decoder.readIndex());
+        if (unionIndex554 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, null);
+        } else {
+            if (unionIndex554 == 1) {
+                Utf8 charSequence554;
+                Object oldString554 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(554);
+                if (oldString554 instanceof Utf8) {
+                    charSequence554 = (decoder).readString(((Utf8) oldString554));
+                } else {
+                    charSequence554 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, charSequence554);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F554': "+ unionIndex554));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex555 = (decoder.readIndex());
+        if (unionIndex555 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, null);
+        } else {
+            if (unionIndex555 == 1) {
+                Utf8 charSequence555;
+                Object oldString555 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(555);
+                if (oldString555 instanceof Utf8) {
+                    charSequence555 = (decoder).readString(((Utf8) oldString555));
+                } else {
+                    charSequence555 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, charSequence555);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F555': "+ unionIndex555));
+            }
+        }
+        int unionIndex556 = (decoder.readIndex());
+        if (unionIndex556 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, null);
+        } else {
+            if (unionIndex556 == 1) {
+                Utf8 charSequence556;
+                Object oldString556 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(556);
+                if (oldString556 instanceof Utf8) {
+                    charSequence556 = (decoder).readString(((Utf8) oldString556));
+                } else {
+                    charSequence556 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, charSequence556);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F556': "+ unionIndex556));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex557 = (decoder.readIndex());
+        if (unionIndex557 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, null);
+        } else {
+            if (unionIndex557 == 1) {
+                Utf8 charSequence557;
+                Object oldString557 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(557);
+                if (oldString557 instanceof Utf8) {
+                    charSequence557 = (decoder).readString(((Utf8) oldString557));
+                } else {
+                    charSequence557 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, charSequence557);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F557': "+ unionIndex557));
+            }
+        }
+        int unionIndex558 = (decoder.readIndex());
+        if (unionIndex558 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, null);
+        } else {
+            if (unionIndex558 == 1) {
+                Utf8 charSequence558;
+                Object oldString558 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(558);
+                if (oldString558 instanceof Utf8) {
+                    charSequence558 = (decoder).readString(((Utf8) oldString558));
+                } else {
+                    charSequence558 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, charSequence558);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F558': "+ unionIndex558));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex559 = (decoder.readIndex());
+        if (unionIndex559 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, null);
+        } else {
+            if (unionIndex559 == 1) {
+                Utf8 charSequence559;
+                Object oldString559 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(559);
+                if (oldString559 instanceof Utf8) {
+                    charSequence559 = (decoder).readString(((Utf8) oldString559));
+                } else {
+                    charSequence559 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, charSequence559);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F559': "+ unionIndex559));
+            }
+        }
+        int unionIndex560 = (decoder.readIndex());
+        if (unionIndex560 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, null);
+        } else {
+            if (unionIndex560 == 1) {
+                Utf8 charSequence560;
+                Object oldString560 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(560);
+                if (oldString560 instanceof Utf8) {
+                    charSequence560 = (decoder).readString(((Utf8) oldString560));
+                } else {
+                    charSequence560 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, charSequence560);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F560': "+ unionIndex560));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex561 = (decoder.readIndex());
+        if (unionIndex561 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, null);
+        } else {
+            if (unionIndex561 == 1) {
+                Utf8 charSequence561;
+                Object oldString561 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(561);
+                if (oldString561 instanceof Utf8) {
+                    charSequence561 = (decoder).readString(((Utf8) oldString561));
+                } else {
+                    charSequence561 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, charSequence561);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F561': "+ unionIndex561));
+            }
+        }
+        int unionIndex562 = (decoder.readIndex());
+        if (unionIndex562 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, null);
+        } else {
+            if (unionIndex562 == 1) {
+                Utf8 charSequence562;
+                Object oldString562 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(562);
+                if (oldString562 instanceof Utf8) {
+                    charSequence562 = (decoder).readString(((Utf8) oldString562));
+                } else {
+                    charSequence562 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, charSequence562);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F562': "+ unionIndex562));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex563 = (decoder.readIndex());
+        if (unionIndex563 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, null);
+        } else {
+            if (unionIndex563 == 1) {
+                Utf8 charSequence563;
+                Object oldString563 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(563);
+                if (oldString563 instanceof Utf8) {
+                    charSequence563 = (decoder).readString(((Utf8) oldString563));
+                } else {
+                    charSequence563 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, charSequence563);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F563': "+ unionIndex563));
+            }
+        }
+        int unionIndex564 = (decoder.readIndex());
+        if (unionIndex564 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, null);
+        } else {
+            if (unionIndex564 == 1) {
+                Utf8 charSequence564;
+                Object oldString564 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(564);
+                if (oldString564 instanceof Utf8) {
+                    charSequence564 = (decoder).readString(((Utf8) oldString564));
+                } else {
+                    charSequence564 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, charSequence564);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F564': "+ unionIndex564));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex565 = (decoder.readIndex());
+        if (unionIndex565 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, null);
+        } else {
+            if (unionIndex565 == 1) {
+                Utf8 charSequence565;
+                Object oldString565 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(565);
+                if (oldString565 instanceof Utf8) {
+                    charSequence565 = (decoder).readString(((Utf8) oldString565));
+                } else {
+                    charSequence565 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, charSequence565);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F565': "+ unionIndex565));
+            }
+        }
+        int unionIndex566 = (decoder.readIndex());
+        if (unionIndex566 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, null);
+        } else {
+            if (unionIndex566 == 1) {
+                Utf8 charSequence566;
+                Object oldString566 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(566);
+                if (oldString566 instanceof Utf8) {
+                    charSequence566 = (decoder).readString(((Utf8) oldString566));
+                } else {
+                    charSequence566 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, charSequence566);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F566': "+ unionIndex566));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex567 = (decoder.readIndex());
+        if (unionIndex567 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, null);
+        } else {
+            if (unionIndex567 == 1) {
+                Utf8 charSequence567;
+                Object oldString567 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(567);
+                if (oldString567 instanceof Utf8) {
+                    charSequence567 = (decoder).readString(((Utf8) oldString567));
+                } else {
+                    charSequence567 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, charSequence567);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F567': "+ unionIndex567));
+            }
+        }
+        int unionIndex568 = (decoder.readIndex());
+        if (unionIndex568 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, null);
+        } else {
+            if (unionIndex568 == 1) {
+                Utf8 charSequence568;
+                Object oldString568 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(568);
+                if (oldString568 instanceof Utf8) {
+                    charSequence568 = (decoder).readString(((Utf8) oldString568));
+                } else {
+                    charSequence568 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, charSequence568);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F568': "+ unionIndex568));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex569 = (decoder.readIndex());
+        if (unionIndex569 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, null);
+        } else {
+            if (unionIndex569 == 1) {
+                Utf8 charSequence569;
+                Object oldString569 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(569);
+                if (oldString569 instanceof Utf8) {
+                    charSequence569 = (decoder).readString(((Utf8) oldString569));
+                } else {
+                    charSequence569 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, charSequence569);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F569': "+ unionIndex569));
+            }
+        }
+        int unionIndex570 = (decoder.readIndex());
+        if (unionIndex570 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, null);
+        } else {
+            if (unionIndex570 == 1) {
+                Utf8 charSequence570;
+                Object oldString570 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(570);
+                if (oldString570 instanceof Utf8) {
+                    charSequence570 = (decoder).readString(((Utf8) oldString570));
+                } else {
+                    charSequence570 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, charSequence570);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F570': "+ unionIndex570));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex571 = (decoder.readIndex());
+        if (unionIndex571 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, null);
+        } else {
+            if (unionIndex571 == 1) {
+                Utf8 charSequence571;
+                Object oldString571 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(571);
+                if (oldString571 instanceof Utf8) {
+                    charSequence571 = (decoder).readString(((Utf8) oldString571));
+                } else {
+                    charSequence571 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, charSequence571);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F571': "+ unionIndex571));
+            }
+        }
+        int unionIndex572 = (decoder.readIndex());
+        if (unionIndex572 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, null);
+        } else {
+            if (unionIndex572 == 1) {
+                Utf8 charSequence572;
+                Object oldString572 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(572);
+                if (oldString572 instanceof Utf8) {
+                    charSequence572 = (decoder).readString(((Utf8) oldString572));
+                } else {
+                    charSequence572 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, charSequence572);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F572': "+ unionIndex572));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex573 = (decoder.readIndex());
+        if (unionIndex573 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, null);
+        } else {
+            if (unionIndex573 == 1) {
+                Utf8 charSequence573;
+                Object oldString573 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(573);
+                if (oldString573 instanceof Utf8) {
+                    charSequence573 = (decoder).readString(((Utf8) oldString573));
+                } else {
+                    charSequence573 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, charSequence573);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F573': "+ unionIndex573));
+            }
+        }
+        int unionIndex574 = (decoder.readIndex());
+        if (unionIndex574 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, null);
+        } else {
+            if (unionIndex574 == 1) {
+                Utf8 charSequence574;
+                Object oldString574 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(574);
+                if (oldString574 instanceof Utf8) {
+                    charSequence574 = (decoder).readString(((Utf8) oldString574));
+                } else {
+                    charSequence574 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, charSequence574);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F574': "+ unionIndex574));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex575 = (decoder.readIndex());
+        if (unionIndex575 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, null);
+        } else {
+            if (unionIndex575 == 1) {
+                Utf8 charSequence575;
+                Object oldString575 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(575);
+                if (oldString575 instanceof Utf8) {
+                    charSequence575 = (decoder).readString(((Utf8) oldString575));
+                } else {
+                    charSequence575 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, charSequence575);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F575': "+ unionIndex575));
+            }
+        }
+        int unionIndex576 = (decoder.readIndex());
+        if (unionIndex576 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, null);
+        } else {
+            if (unionIndex576 == 1) {
+                Utf8 charSequence576;
+                Object oldString576 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(576);
+                if (oldString576 instanceof Utf8) {
+                    charSequence576 = (decoder).readString(((Utf8) oldString576));
+                } else {
+                    charSequence576 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, charSequence576);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F576': "+ unionIndex576));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex577 = (decoder.readIndex());
+        if (unionIndex577 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, null);
+        } else {
+            if (unionIndex577 == 1) {
+                Utf8 charSequence577;
+                Object oldString577 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(577);
+                if (oldString577 instanceof Utf8) {
+                    charSequence577 = (decoder).readString(((Utf8) oldString577));
+                } else {
+                    charSequence577 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, charSequence577);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F577': "+ unionIndex577));
+            }
+        }
+        int unionIndex578 = (decoder.readIndex());
+        if (unionIndex578 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, null);
+        } else {
+            if (unionIndex578 == 1) {
+                Utf8 charSequence578;
+                Object oldString578 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(578);
+                if (oldString578 instanceof Utf8) {
+                    charSequence578 = (decoder).readString(((Utf8) oldString578));
+                } else {
+                    charSequence578 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, charSequence578);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F578': "+ unionIndex578));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex579 = (decoder.readIndex());
+        if (unionIndex579 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, null);
+        } else {
+            if (unionIndex579 == 1) {
+                Utf8 charSequence579;
+                Object oldString579 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(579);
+                if (oldString579 instanceof Utf8) {
+                    charSequence579 = (decoder).readString(((Utf8) oldString579));
+                } else {
+                    charSequence579 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, charSequence579);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F579': "+ unionIndex579));
+            }
+        }
+        int unionIndex580 = (decoder.readIndex());
+        if (unionIndex580 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, null);
+        } else {
+            if (unionIndex580 == 1) {
+                Utf8 charSequence580;
+                Object oldString580 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(580);
+                if (oldString580 instanceof Utf8) {
+                    charSequence580 = (decoder).readString(((Utf8) oldString580));
+                } else {
+                    charSequence580 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, charSequence580);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F580': "+ unionIndex580));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex581 = (decoder.readIndex());
+        if (unionIndex581 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, null);
+        } else {
+            if (unionIndex581 == 1) {
+                Utf8 charSequence581;
+                Object oldString581 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(581);
+                if (oldString581 instanceof Utf8) {
+                    charSequence581 = (decoder).readString(((Utf8) oldString581));
+                } else {
+                    charSequence581 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, charSequence581);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F581': "+ unionIndex581));
+            }
+        }
+        int unionIndex582 = (decoder.readIndex());
+        if (unionIndex582 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, null);
+        } else {
+            if (unionIndex582 == 1) {
+                Utf8 charSequence582;
+                Object oldString582 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(582);
+                if (oldString582 instanceof Utf8) {
+                    charSequence582 = (decoder).readString(((Utf8) oldString582));
+                } else {
+                    charSequence582 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, charSequence582);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F582': "+ unionIndex582));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex583 = (decoder.readIndex());
+        if (unionIndex583 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, null);
+        } else {
+            if (unionIndex583 == 1) {
+                Utf8 charSequence583;
+                Object oldString583 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(583);
+                if (oldString583 instanceof Utf8) {
+                    charSequence583 = (decoder).readString(((Utf8) oldString583));
+                } else {
+                    charSequence583 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, charSequence583);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F583': "+ unionIndex583));
+            }
+        }
+        int unionIndex584 = (decoder.readIndex());
+        if (unionIndex584 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, null);
+        } else {
+            if (unionIndex584 == 1) {
+                Utf8 charSequence584;
+                Object oldString584 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(584);
+                if (oldString584 instanceof Utf8) {
+                    charSequence584 = (decoder).readString(((Utf8) oldString584));
+                } else {
+                    charSequence584 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, charSequence584);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F584': "+ unionIndex584));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex585 = (decoder.readIndex());
+        if (unionIndex585 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, null);
+        } else {
+            if (unionIndex585 == 1) {
+                Utf8 charSequence585;
+                Object oldString585 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(585);
+                if (oldString585 instanceof Utf8) {
+                    charSequence585 = (decoder).readString(((Utf8) oldString585));
+                } else {
+                    charSequence585 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, charSequence585);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F585': "+ unionIndex585));
+            }
+        }
+        int unionIndex586 = (decoder.readIndex());
+        if (unionIndex586 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, null);
+        } else {
+            if (unionIndex586 == 1) {
+                Utf8 charSequence586;
+                Object oldString586 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(586);
+                if (oldString586 instanceof Utf8) {
+                    charSequence586 = (decoder).readString(((Utf8) oldString586));
+                } else {
+                    charSequence586 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, charSequence586);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F586': "+ unionIndex586));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex587 = (decoder.readIndex());
+        if (unionIndex587 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, null);
+        } else {
+            if (unionIndex587 == 1) {
+                Utf8 charSequence587;
+                Object oldString587 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(587);
+                if (oldString587 instanceof Utf8) {
+                    charSequence587 = (decoder).readString(((Utf8) oldString587));
+                } else {
+                    charSequence587 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, charSequence587);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F587': "+ unionIndex587));
+            }
+        }
+        int unionIndex588 = (decoder.readIndex());
+        if (unionIndex588 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, null);
+        } else {
+            if (unionIndex588 == 1) {
+                Utf8 charSequence588;
+                Object oldString588 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(588);
+                if (oldString588 instanceof Utf8) {
+                    charSequence588 = (decoder).readString(((Utf8) oldString588));
+                } else {
+                    charSequence588 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, charSequence588);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F588': "+ unionIndex588));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex589 = (decoder.readIndex());
+        if (unionIndex589 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, null);
+        } else {
+            if (unionIndex589 == 1) {
+                Utf8 charSequence589;
+                Object oldString589 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(589);
+                if (oldString589 instanceof Utf8) {
+                    charSequence589 = (decoder).readString(((Utf8) oldString589));
+                } else {
+                    charSequence589 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, charSequence589);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F589': "+ unionIndex589));
+            }
+        }
+        int unionIndex590 = (decoder.readIndex());
+        if (unionIndex590 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, null);
+        } else {
+            if (unionIndex590 == 1) {
+                Utf8 charSequence590;
+                Object oldString590 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(590);
+                if (oldString590 instanceof Utf8) {
+                    charSequence590 = (decoder).readString(((Utf8) oldString590));
+                } else {
+                    charSequence590 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, charSequence590);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F590': "+ unionIndex590));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex591 = (decoder.readIndex());
+        if (unionIndex591 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, null);
+        } else {
+            if (unionIndex591 == 1) {
+                Utf8 charSequence591;
+                Object oldString591 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(591);
+                if (oldString591 instanceof Utf8) {
+                    charSequence591 = (decoder).readString(((Utf8) oldString591));
+                } else {
+                    charSequence591 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, charSequence591);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F591': "+ unionIndex591));
+            }
+        }
+        int unionIndex592 = (decoder.readIndex());
+        if (unionIndex592 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, null);
+        } else {
+            if (unionIndex592 == 1) {
+                Utf8 charSequence592;
+                Object oldString592 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(592);
+                if (oldString592 instanceof Utf8) {
+                    charSequence592 = (decoder).readString(((Utf8) oldString592));
+                } else {
+                    charSequence592 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, charSequence592);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F592': "+ unionIndex592));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex593 = (decoder.readIndex());
+        if (unionIndex593 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, null);
+        } else {
+            if (unionIndex593 == 1) {
+                Utf8 charSequence593;
+                Object oldString593 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(593);
+                if (oldString593 instanceof Utf8) {
+                    charSequence593 = (decoder).readString(((Utf8) oldString593));
+                } else {
+                    charSequence593 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, charSequence593);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F593': "+ unionIndex593));
+            }
+        }
+        int unionIndex594 = (decoder.readIndex());
+        if (unionIndex594 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, null);
+        } else {
+            if (unionIndex594 == 1) {
+                Utf8 charSequence594;
+                Object oldString594 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(594);
+                if (oldString594 instanceof Utf8) {
+                    charSequence594 = (decoder).readString(((Utf8) oldString594));
+                } else {
+                    charSequence594 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, charSequence594);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F594': "+ unionIndex594));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex595 = (decoder.readIndex());
+        if (unionIndex595 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, null);
+        } else {
+            if (unionIndex595 == 1) {
+                Utf8 charSequence595;
+                Object oldString595 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(595);
+                if (oldString595 instanceof Utf8) {
+                    charSequence595 = (decoder).readString(((Utf8) oldString595));
+                } else {
+                    charSequence595 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, charSequence595);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F595': "+ unionIndex595));
+            }
+        }
+        int unionIndex596 = (decoder.readIndex());
+        if (unionIndex596 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, null);
+        } else {
+            if (unionIndex596 == 1) {
+                Utf8 charSequence596;
+                Object oldString596 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(596);
+                if (oldString596 instanceof Utf8) {
+                    charSequence596 = (decoder).readString(((Utf8) oldString596));
+                } else {
+                    charSequence596 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, charSequence596);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F596': "+ unionIndex596));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex597 = (decoder.readIndex());
+        if (unionIndex597 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, null);
+        } else {
+            if (unionIndex597 == 1) {
+                Utf8 charSequence597;
+                Object oldString597 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(597);
+                if (oldString597 instanceof Utf8) {
+                    charSequence597 = (decoder).readString(((Utf8) oldString597));
+                } else {
+                    charSequence597 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, charSequence597);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F597': "+ unionIndex597));
+            }
+        }
+        int unionIndex598 = (decoder.readIndex());
+        if (unionIndex598 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, null);
+        } else {
+            if (unionIndex598 == 1) {
+                Utf8 charSequence598;
+                Object oldString598 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(598);
+                if (oldString598 instanceof Utf8) {
+                    charSequence598 = (decoder).readString(((Utf8) oldString598));
+                } else {
+                    charSequence598 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, charSequence598);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F598': "+ unionIndex598));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex599 = (decoder.readIndex());
+        if (unionIndex599 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, null);
+        } else {
+            if (unionIndex599 == 1) {
+                Utf8 charSequence599;
+                Object oldString599 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(599);
+                if (oldString599 instanceof Utf8) {
+                    charSequence599 = (decoder).readString(((Utf8) oldString599));
+                } else {
+                    charSequence599 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, charSequence599);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F599': "+ unionIndex599));
+            }
+        }
+        int unionIndex600 = (decoder.readIndex());
+        if (unionIndex600 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, null);
+        } else {
+            if (unionIndex600 == 1) {
+                Utf8 charSequence600;
+                Object oldString600 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(600);
+                if (oldString600 instanceof Utf8) {
+                    charSequence600 = (decoder).readString(((Utf8) oldString600));
+                } else {
+                    charSequence600 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, charSequence600);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F600': "+ unionIndex600));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex601 = (decoder.readIndex());
+        if (unionIndex601 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, null);
+        } else {
+            if (unionIndex601 == 1) {
+                Utf8 charSequence601;
+                Object oldString601 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(601);
+                if (oldString601 instanceof Utf8) {
+                    charSequence601 = (decoder).readString(((Utf8) oldString601));
+                } else {
+                    charSequence601 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, charSequence601);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F601': "+ unionIndex601));
+            }
+        }
+        int unionIndex602 = (decoder.readIndex());
+        if (unionIndex602 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, null);
+        } else {
+            if (unionIndex602 == 1) {
+                Utf8 charSequence602;
+                Object oldString602 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(602);
+                if (oldString602 instanceof Utf8) {
+                    charSequence602 = (decoder).readString(((Utf8) oldString602));
+                } else {
+                    charSequence602 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, charSequence602);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F602': "+ unionIndex602));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex603 = (decoder.readIndex());
+        if (unionIndex603 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, null);
+        } else {
+            if (unionIndex603 == 1) {
+                Utf8 charSequence603;
+                Object oldString603 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(603);
+                if (oldString603 instanceof Utf8) {
+                    charSequence603 = (decoder).readString(((Utf8) oldString603));
+                } else {
+                    charSequence603 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, charSequence603);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F603': "+ unionIndex603));
+            }
+        }
+        int unionIndex604 = (decoder.readIndex());
+        if (unionIndex604 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, null);
+        } else {
+            if (unionIndex604 == 1) {
+                Utf8 charSequence604;
+                Object oldString604 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(604);
+                if (oldString604 instanceof Utf8) {
+                    charSequence604 = (decoder).readString(((Utf8) oldString604));
+                } else {
+                    charSequence604 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, charSequence604);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F604': "+ unionIndex604));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex605 = (decoder.readIndex());
+        if (unionIndex605 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, null);
+        } else {
+            if (unionIndex605 == 1) {
+                Utf8 charSequence605;
+                Object oldString605 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(605);
+                if (oldString605 instanceof Utf8) {
+                    charSequence605 = (decoder).readString(((Utf8) oldString605));
+                } else {
+                    charSequence605 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, charSequence605);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F605': "+ unionIndex605));
+            }
+        }
+        int unionIndex606 = (decoder.readIndex());
+        if (unionIndex606 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, null);
+        } else {
+            if (unionIndex606 == 1) {
+                Utf8 charSequence606;
+                Object oldString606 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(606);
+                if (oldString606 instanceof Utf8) {
+                    charSequence606 = (decoder).readString(((Utf8) oldString606));
+                } else {
+                    charSequence606 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, charSequence606);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F606': "+ unionIndex606));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex607 = (decoder.readIndex());
+        if (unionIndex607 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, null);
+        } else {
+            if (unionIndex607 == 1) {
+                Utf8 charSequence607;
+                Object oldString607 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(607);
+                if (oldString607 instanceof Utf8) {
+                    charSequence607 = (decoder).readString(((Utf8) oldString607));
+                } else {
+                    charSequence607 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, charSequence607);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F607': "+ unionIndex607));
+            }
+        }
+        int unionIndex608 = (decoder.readIndex());
+        if (unionIndex608 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, null);
+        } else {
+            if (unionIndex608 == 1) {
+                Utf8 charSequence608;
+                Object oldString608 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(608);
+                if (oldString608 instanceof Utf8) {
+                    charSequence608 = (decoder).readString(((Utf8) oldString608));
+                } else {
+                    charSequence608 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, charSequence608);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F608': "+ unionIndex608));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex609 = (decoder.readIndex());
+        if (unionIndex609 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, null);
+        } else {
+            if (unionIndex609 == 1) {
+                Utf8 charSequence609;
+                Object oldString609 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(609);
+                if (oldString609 instanceof Utf8) {
+                    charSequence609 = (decoder).readString(((Utf8) oldString609));
+                } else {
+                    charSequence609 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, charSequence609);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F609': "+ unionIndex609));
+            }
+        }
+        int unionIndex610 = (decoder.readIndex());
+        if (unionIndex610 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, null);
+        } else {
+            if (unionIndex610 == 1) {
+                Utf8 charSequence610;
+                Object oldString610 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(610);
+                if (oldString610 instanceof Utf8) {
+                    charSequence610 = (decoder).readString(((Utf8) oldString610));
+                } else {
+                    charSequence610 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, charSequence610);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F610': "+ unionIndex610));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex611 = (decoder.readIndex());
+        if (unionIndex611 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, null);
+        } else {
+            if (unionIndex611 == 1) {
+                Utf8 charSequence611;
+                Object oldString611 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(611);
+                if (oldString611 instanceof Utf8) {
+                    charSequence611 = (decoder).readString(((Utf8) oldString611));
+                } else {
+                    charSequence611 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, charSequence611);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F611': "+ unionIndex611));
+            }
+        }
+        int unionIndex612 = (decoder.readIndex());
+        if (unionIndex612 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, null);
+        } else {
+            if (unionIndex612 == 1) {
+                Utf8 charSequence612;
+                Object oldString612 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(612);
+                if (oldString612 instanceof Utf8) {
+                    charSequence612 = (decoder).readString(((Utf8) oldString612));
+                } else {
+                    charSequence612 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, charSequence612);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F612': "+ unionIndex612));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex613 = (decoder.readIndex());
+        if (unionIndex613 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, null);
+        } else {
+            if (unionIndex613 == 1) {
+                Utf8 charSequence613;
+                Object oldString613 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(613);
+                if (oldString613 instanceof Utf8) {
+                    charSequence613 = (decoder).readString(((Utf8) oldString613));
+                } else {
+                    charSequence613 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, charSequence613);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F613': "+ unionIndex613));
+            }
+        }
+        int unionIndex614 = (decoder.readIndex());
+        if (unionIndex614 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, null);
+        } else {
+            if (unionIndex614 == 1) {
+                Utf8 charSequence614;
+                Object oldString614 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(614);
+                if (oldString614 instanceof Utf8) {
+                    charSequence614 = (decoder).readString(((Utf8) oldString614));
+                } else {
+                    charSequence614 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, charSequence614);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F614': "+ unionIndex614));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex615 = (decoder.readIndex());
+        if (unionIndex615 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, null);
+        } else {
+            if (unionIndex615 == 1) {
+                Utf8 charSequence615;
+                Object oldString615 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(615);
+                if (oldString615 instanceof Utf8) {
+                    charSequence615 = (decoder).readString(((Utf8) oldString615));
+                } else {
+                    charSequence615 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, charSequence615);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F615': "+ unionIndex615));
+            }
+        }
+        int unionIndex616 = (decoder.readIndex());
+        if (unionIndex616 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, null);
+        } else {
+            if (unionIndex616 == 1) {
+                Utf8 charSequence616;
+                Object oldString616 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(616);
+                if (oldString616 instanceof Utf8) {
+                    charSequence616 = (decoder).readString(((Utf8) oldString616));
+                } else {
+                    charSequence616 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, charSequence616);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F616': "+ unionIndex616));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex617 = (decoder.readIndex());
+        if (unionIndex617 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, null);
+        } else {
+            if (unionIndex617 == 1) {
+                Utf8 charSequence617;
+                Object oldString617 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(617);
+                if (oldString617 instanceof Utf8) {
+                    charSequence617 = (decoder).readString(((Utf8) oldString617));
+                } else {
+                    charSequence617 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, charSequence617);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F617': "+ unionIndex617));
+            }
+        }
+        int unionIndex618 = (decoder.readIndex());
+        if (unionIndex618 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, null);
+        } else {
+            if (unionIndex618 == 1) {
+                Utf8 charSequence618;
+                Object oldString618 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(618);
+                if (oldString618 instanceof Utf8) {
+                    charSequence618 = (decoder).readString(((Utf8) oldString618));
+                } else {
+                    charSequence618 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, charSequence618);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F618': "+ unionIndex618));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex619 = (decoder.readIndex());
+        if (unionIndex619 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, null);
+        } else {
+            if (unionIndex619 == 1) {
+                Utf8 charSequence619;
+                Object oldString619 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(619);
+                if (oldString619 instanceof Utf8) {
+                    charSequence619 = (decoder).readString(((Utf8) oldString619));
+                } else {
+                    charSequence619 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, charSequence619);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F619': "+ unionIndex619));
+            }
+        }
+        int unionIndex620 = (decoder.readIndex());
+        if (unionIndex620 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, null);
+        } else {
+            if (unionIndex620 == 1) {
+                Utf8 charSequence620;
+                Object oldString620 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(620);
+                if (oldString620 instanceof Utf8) {
+                    charSequence620 = (decoder).readString(((Utf8) oldString620));
+                } else {
+                    charSequence620 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, charSequence620);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F620': "+ unionIndex620));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex621 = (decoder.readIndex());
+        if (unionIndex621 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, null);
+        } else {
+            if (unionIndex621 == 1) {
+                Utf8 charSequence621;
+                Object oldString621 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(621);
+                if (oldString621 instanceof Utf8) {
+                    charSequence621 = (decoder).readString(((Utf8) oldString621));
+                } else {
+                    charSequence621 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, charSequence621);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F621': "+ unionIndex621));
+            }
+        }
+        int unionIndex622 = (decoder.readIndex());
+        if (unionIndex622 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, null);
+        } else {
+            if (unionIndex622 == 1) {
+                Utf8 charSequence622;
+                Object oldString622 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(622);
+                if (oldString622 instanceof Utf8) {
+                    charSequence622 = (decoder).readString(((Utf8) oldString622));
+                } else {
+                    charSequence622 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, charSequence622);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F622': "+ unionIndex622));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex623 = (decoder.readIndex());
+        if (unionIndex623 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, null);
+        } else {
+            if (unionIndex623 == 1) {
+                Utf8 charSequence623;
+                Object oldString623 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(623);
+                if (oldString623 instanceof Utf8) {
+                    charSequence623 = (decoder).readString(((Utf8) oldString623));
+                } else {
+                    charSequence623 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, charSequence623);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F623': "+ unionIndex623));
+            }
+        }
+        int unionIndex624 = (decoder.readIndex());
+        if (unionIndex624 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, null);
+        } else {
+            if (unionIndex624 == 1) {
+                Utf8 charSequence624;
+                Object oldString624 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(624);
+                if (oldString624 instanceof Utf8) {
+                    charSequence624 = (decoder).readString(((Utf8) oldString624));
+                } else {
+                    charSequence624 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, charSequence624);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F624': "+ unionIndex624));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex625 = (decoder.readIndex());
+        if (unionIndex625 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, null);
+        } else {
+            if (unionIndex625 == 1) {
+                Utf8 charSequence625;
+                Object oldString625 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(625);
+                if (oldString625 instanceof Utf8) {
+                    charSequence625 = (decoder).readString(((Utf8) oldString625));
+                } else {
+                    charSequence625 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, charSequence625);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F625': "+ unionIndex625));
+            }
+        }
+        int unionIndex626 = (decoder.readIndex());
+        if (unionIndex626 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, null);
+        } else {
+            if (unionIndex626 == 1) {
+                Utf8 charSequence626;
+                Object oldString626 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(626);
+                if (oldString626 instanceof Utf8) {
+                    charSequence626 = (decoder).readString(((Utf8) oldString626));
+                } else {
+                    charSequence626 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, charSequence626);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F626': "+ unionIndex626));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex627 = (decoder.readIndex());
+        if (unionIndex627 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, null);
+        } else {
+            if (unionIndex627 == 1) {
+                Utf8 charSequence627;
+                Object oldString627 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(627);
+                if (oldString627 instanceof Utf8) {
+                    charSequence627 = (decoder).readString(((Utf8) oldString627));
+                } else {
+                    charSequence627 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, charSequence627);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F627': "+ unionIndex627));
+            }
+        }
+        int unionIndex628 = (decoder.readIndex());
+        if (unionIndex628 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, null);
+        } else {
+            if (unionIndex628 == 1) {
+                Utf8 charSequence628;
+                Object oldString628 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(628);
+                if (oldString628 instanceof Utf8) {
+                    charSequence628 = (decoder).readString(((Utf8) oldString628));
+                } else {
+                    charSequence628 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, charSequence628);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F628': "+ unionIndex628));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex629 = (decoder.readIndex());
+        if (unionIndex629 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, null);
+        } else {
+            if (unionIndex629 == 1) {
+                Utf8 charSequence629;
+                Object oldString629 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(629);
+                if (oldString629 instanceof Utf8) {
+                    charSequence629 = (decoder).readString(((Utf8) oldString629));
+                } else {
+                    charSequence629 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, charSequence629);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F629': "+ unionIndex629));
+            }
+        }
+        int unionIndex630 = (decoder.readIndex());
+        if (unionIndex630 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, null);
+        } else {
+            if (unionIndex630 == 1) {
+                Utf8 charSequence630;
+                Object oldString630 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(630);
+                if (oldString630 instanceof Utf8) {
+                    charSequence630 = (decoder).readString(((Utf8) oldString630));
+                } else {
+                    charSequence630 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, charSequence630);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F630': "+ unionIndex630));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex631 = (decoder.readIndex());
+        if (unionIndex631 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, null);
+        } else {
+            if (unionIndex631 == 1) {
+                Utf8 charSequence631;
+                Object oldString631 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(631);
+                if (oldString631 instanceof Utf8) {
+                    charSequence631 = (decoder).readString(((Utf8) oldString631));
+                } else {
+                    charSequence631 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, charSequence631);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F631': "+ unionIndex631));
+            }
+        }
+        int unionIndex632 = (decoder.readIndex());
+        if (unionIndex632 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, null);
+        } else {
+            if (unionIndex632 == 1) {
+                Utf8 charSequence632;
+                Object oldString632 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(632);
+                if (oldString632 instanceof Utf8) {
+                    charSequence632 = (decoder).readString(((Utf8) oldString632));
+                } else {
+                    charSequence632 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, charSequence632);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F632': "+ unionIndex632));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex633 = (decoder.readIndex());
+        if (unionIndex633 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, null);
+        } else {
+            if (unionIndex633 == 1) {
+                Utf8 charSequence633;
+                Object oldString633 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(633);
+                if (oldString633 instanceof Utf8) {
+                    charSequence633 = (decoder).readString(((Utf8) oldString633));
+                } else {
+                    charSequence633 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, charSequence633);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F633': "+ unionIndex633));
+            }
+        }
+        int unionIndex634 = (decoder.readIndex());
+        if (unionIndex634 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, null);
+        } else {
+            if (unionIndex634 == 1) {
+                Utf8 charSequence634;
+                Object oldString634 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(634);
+                if (oldString634 instanceof Utf8) {
+                    charSequence634 = (decoder).readString(((Utf8) oldString634));
+                } else {
+                    charSequence634 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, charSequence634);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F634': "+ unionIndex634));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex635 = (decoder.readIndex());
+        if (unionIndex635 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, null);
+        } else {
+            if (unionIndex635 == 1) {
+                Utf8 charSequence635;
+                Object oldString635 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(635);
+                if (oldString635 instanceof Utf8) {
+                    charSequence635 = (decoder).readString(((Utf8) oldString635));
+                } else {
+                    charSequence635 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, charSequence635);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F635': "+ unionIndex635));
+            }
+        }
+        int unionIndex636 = (decoder.readIndex());
+        if (unionIndex636 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, null);
+        } else {
+            if (unionIndex636 == 1) {
+                Utf8 charSequence636;
+                Object oldString636 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(636);
+                if (oldString636 instanceof Utf8) {
+                    charSequence636 = (decoder).readString(((Utf8) oldString636));
+                } else {
+                    charSequence636 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, charSequence636);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F636': "+ unionIndex636));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex637 = (decoder.readIndex());
+        if (unionIndex637 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, null);
+        } else {
+            if (unionIndex637 == 1) {
+                Utf8 charSequence637;
+                Object oldString637 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(637);
+                if (oldString637 instanceof Utf8) {
+                    charSequence637 = (decoder).readString(((Utf8) oldString637));
+                } else {
+                    charSequence637 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, charSequence637);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F637': "+ unionIndex637));
+            }
+        }
+        int unionIndex638 = (decoder.readIndex());
+        if (unionIndex638 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, null);
+        } else {
+            if (unionIndex638 == 1) {
+                Utf8 charSequence638;
+                Object oldString638 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(638);
+                if (oldString638 instanceof Utf8) {
+                    charSequence638 = (decoder).readString(((Utf8) oldString638));
+                } else {
+                    charSequence638 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, charSequence638);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F638': "+ unionIndex638));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex639 = (decoder.readIndex());
+        if (unionIndex639 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, null);
+        } else {
+            if (unionIndex639 == 1) {
+                Utf8 charSequence639;
+                Object oldString639 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(639);
+                if (oldString639 instanceof Utf8) {
+                    charSequence639 = (decoder).readString(((Utf8) oldString639));
+                } else {
+                    charSequence639 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, charSequence639);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F639': "+ unionIndex639));
+            }
+        }
+        int unionIndex640 = (decoder.readIndex());
+        if (unionIndex640 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, null);
+        } else {
+            if (unionIndex640 == 1) {
+                Utf8 charSequence640;
+                Object oldString640 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(640);
+                if (oldString640 instanceof Utf8) {
+                    charSequence640 = (decoder).readString(((Utf8) oldString640));
+                } else {
+                    charSequence640 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, charSequence640);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F640': "+ unionIndex640));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex641 = (decoder.readIndex());
+        if (unionIndex641 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, null);
+        } else {
+            if (unionIndex641 == 1) {
+                Utf8 charSequence641;
+                Object oldString641 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(641);
+                if (oldString641 instanceof Utf8) {
+                    charSequence641 = (decoder).readString(((Utf8) oldString641));
+                } else {
+                    charSequence641 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, charSequence641);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F641': "+ unionIndex641));
+            }
+        }
+        int unionIndex642 = (decoder.readIndex());
+        if (unionIndex642 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, null);
+        } else {
+            if (unionIndex642 == 1) {
+                Utf8 charSequence642;
+                Object oldString642 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(642);
+                if (oldString642 instanceof Utf8) {
+                    charSequence642 = (decoder).readString(((Utf8) oldString642));
+                } else {
+                    charSequence642 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, charSequence642);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F642': "+ unionIndex642));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex643 = (decoder.readIndex());
+        if (unionIndex643 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, null);
+        } else {
+            if (unionIndex643 == 1) {
+                Utf8 charSequence643;
+                Object oldString643 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(643);
+                if (oldString643 instanceof Utf8) {
+                    charSequence643 = (decoder).readString(((Utf8) oldString643));
+                } else {
+                    charSequence643 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, charSequence643);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F643': "+ unionIndex643));
+            }
+        }
+        int unionIndex644 = (decoder.readIndex());
+        if (unionIndex644 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, null);
+        } else {
+            if (unionIndex644 == 1) {
+                Utf8 charSequence644;
+                Object oldString644 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(644);
+                if (oldString644 instanceof Utf8) {
+                    charSequence644 = (decoder).readString(((Utf8) oldString644));
+                } else {
+                    charSequence644 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, charSequence644);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F644': "+ unionIndex644));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex645 = (decoder.readIndex());
+        if (unionIndex645 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, null);
+        } else {
+            if (unionIndex645 == 1) {
+                Utf8 charSequence645;
+                Object oldString645 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(645);
+                if (oldString645 instanceof Utf8) {
+                    charSequence645 = (decoder).readString(((Utf8) oldString645));
+                } else {
+                    charSequence645 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, charSequence645);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F645': "+ unionIndex645));
+            }
+        }
+        int unionIndex646 = (decoder.readIndex());
+        if (unionIndex646 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, null);
+        } else {
+            if (unionIndex646 == 1) {
+                Utf8 charSequence646;
+                Object oldString646 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(646);
+                if (oldString646 instanceof Utf8) {
+                    charSequence646 = (decoder).readString(((Utf8) oldString646));
+                } else {
+                    charSequence646 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, charSequence646);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F646': "+ unionIndex646));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex647 = (decoder.readIndex());
+        if (unionIndex647 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, null);
+        } else {
+            if (unionIndex647 == 1) {
+                Utf8 charSequence647;
+                Object oldString647 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(647);
+                if (oldString647 instanceof Utf8) {
+                    charSequence647 = (decoder).readString(((Utf8) oldString647));
+                } else {
+                    charSequence647 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, charSequence647);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F647': "+ unionIndex647));
+            }
+        }
+        int unionIndex648 = (decoder.readIndex());
+        if (unionIndex648 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, null);
+        } else {
+            if (unionIndex648 == 1) {
+                Utf8 charSequence648;
+                Object oldString648 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(648);
+                if (oldString648 instanceof Utf8) {
+                    charSequence648 = (decoder).readString(((Utf8) oldString648));
+                } else {
+                    charSequence648 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, charSequence648);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F648': "+ unionIndex648));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex649 = (decoder.readIndex());
+        if (unionIndex649 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, null);
+        } else {
+            if (unionIndex649 == 1) {
+                Utf8 charSequence649;
+                Object oldString649 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(649);
+                if (oldString649 instanceof Utf8) {
+                    charSequence649 = (decoder).readString(((Utf8) oldString649));
+                } else {
+                    charSequence649 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, charSequence649);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F649': "+ unionIndex649));
+            }
+        }
+        int unionIndex650 = (decoder.readIndex());
+        if (unionIndex650 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, null);
+        } else {
+            if (unionIndex650 == 1) {
+                Utf8 charSequence650;
+                Object oldString650 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(650);
+                if (oldString650 instanceof Utf8) {
+                    charSequence650 = (decoder).readString(((Utf8) oldString650));
+                } else {
+                    charSequence650 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, charSequence650);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F650': "+ unionIndex650));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex651 = (decoder.readIndex());
+        if (unionIndex651 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, null);
+        } else {
+            if (unionIndex651 == 1) {
+                Utf8 charSequence651;
+                Object oldString651 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(651);
+                if (oldString651 instanceof Utf8) {
+                    charSequence651 = (decoder).readString(((Utf8) oldString651));
+                } else {
+                    charSequence651 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, charSequence651);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F651': "+ unionIndex651));
+            }
+        }
+        int unionIndex652 = (decoder.readIndex());
+        if (unionIndex652 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, null);
+        } else {
+            if (unionIndex652 == 1) {
+                Utf8 charSequence652;
+                Object oldString652 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(652);
+                if (oldString652 instanceof Utf8) {
+                    charSequence652 = (decoder).readString(((Utf8) oldString652));
+                } else {
+                    charSequence652 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, charSequence652);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F652': "+ unionIndex652));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex653 = (decoder.readIndex());
+        if (unionIndex653 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, null);
+        } else {
+            if (unionIndex653 == 1) {
+                Utf8 charSequence653;
+                Object oldString653 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(653);
+                if (oldString653 instanceof Utf8) {
+                    charSequence653 = (decoder).readString(((Utf8) oldString653));
+                } else {
+                    charSequence653 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, charSequence653);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F653': "+ unionIndex653));
+            }
+        }
+        int unionIndex654 = (decoder.readIndex());
+        if (unionIndex654 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, null);
+        } else {
+            if (unionIndex654 == 1) {
+                Utf8 charSequence654;
+                Object oldString654 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(654);
+                if (oldString654 instanceof Utf8) {
+                    charSequence654 = (decoder).readString(((Utf8) oldString654));
+                } else {
+                    charSequence654 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, charSequence654);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F654': "+ unionIndex654));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex655 = (decoder.readIndex());
+        if (unionIndex655 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, null);
+        } else {
+            if (unionIndex655 == 1) {
+                Utf8 charSequence655;
+                Object oldString655 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(655);
+                if (oldString655 instanceof Utf8) {
+                    charSequence655 = (decoder).readString(((Utf8) oldString655));
+                } else {
+                    charSequence655 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, charSequence655);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F655': "+ unionIndex655));
+            }
+        }
+        int unionIndex656 = (decoder.readIndex());
+        if (unionIndex656 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, null);
+        } else {
+            if (unionIndex656 == 1) {
+                Utf8 charSequence656;
+                Object oldString656 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(656);
+                if (oldString656 instanceof Utf8) {
+                    charSequence656 = (decoder).readString(((Utf8) oldString656));
+                } else {
+                    charSequence656 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, charSequence656);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F656': "+ unionIndex656));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex657 = (decoder.readIndex());
+        if (unionIndex657 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, null);
+        } else {
+            if (unionIndex657 == 1) {
+                Utf8 charSequence657;
+                Object oldString657 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(657);
+                if (oldString657 instanceof Utf8) {
+                    charSequence657 = (decoder).readString(((Utf8) oldString657));
+                } else {
+                    charSequence657 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, charSequence657);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F657': "+ unionIndex657));
+            }
+        }
+        int unionIndex658 = (decoder.readIndex());
+        if (unionIndex658 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, null);
+        } else {
+            if (unionIndex658 == 1) {
+                Utf8 charSequence658;
+                Object oldString658 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(658);
+                if (oldString658 instanceof Utf8) {
+                    charSequence658 = (decoder).readString(((Utf8) oldString658));
+                } else {
+                    charSequence658 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, charSequence658);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F658': "+ unionIndex658));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex659 = (decoder.readIndex());
+        if (unionIndex659 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, null);
+        } else {
+            if (unionIndex659 == 1) {
+                Utf8 charSequence659;
+                Object oldString659 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(659);
+                if (oldString659 instanceof Utf8) {
+                    charSequence659 = (decoder).readString(((Utf8) oldString659));
+                } else {
+                    charSequence659 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, charSequence659);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F659': "+ unionIndex659));
+            }
+        }
+        int unionIndex660 = (decoder.readIndex());
+        if (unionIndex660 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, null);
+        } else {
+            if (unionIndex660 == 1) {
+                Utf8 charSequence660;
+                Object oldString660 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(660);
+                if (oldString660 instanceof Utf8) {
+                    charSequence660 = (decoder).readString(((Utf8) oldString660));
+                } else {
+                    charSequence660 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, charSequence660);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F660': "+ unionIndex660));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex661 = (decoder.readIndex());
+        if (unionIndex661 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, null);
+        } else {
+            if (unionIndex661 == 1) {
+                Utf8 charSequence661;
+                Object oldString661 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(661);
+                if (oldString661 instanceof Utf8) {
+                    charSequence661 = (decoder).readString(((Utf8) oldString661));
+                } else {
+                    charSequence661 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, charSequence661);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F661': "+ unionIndex661));
+            }
+        }
+        int unionIndex662 = (decoder.readIndex());
+        if (unionIndex662 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, null);
+        } else {
+            if (unionIndex662 == 1) {
+                Utf8 charSequence662;
+                Object oldString662 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(662);
+                if (oldString662 instanceof Utf8) {
+                    charSequence662 = (decoder).readString(((Utf8) oldString662));
+                } else {
+                    charSequence662 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, charSequence662);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F662': "+ unionIndex662));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex663 = (decoder.readIndex());
+        if (unionIndex663 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, null);
+        } else {
+            if (unionIndex663 == 1) {
+                Utf8 charSequence663;
+                Object oldString663 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(663);
+                if (oldString663 instanceof Utf8) {
+                    charSequence663 = (decoder).readString(((Utf8) oldString663));
+                } else {
+                    charSequence663 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, charSequence663);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F663': "+ unionIndex663));
+            }
+        }
+        int unionIndex664 = (decoder.readIndex());
+        if (unionIndex664 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, null);
+        } else {
+            if (unionIndex664 == 1) {
+                Utf8 charSequence664;
+                Object oldString664 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(664);
+                if (oldString664 instanceof Utf8) {
+                    charSequence664 = (decoder).readString(((Utf8) oldString664));
+                } else {
+                    charSequence664 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, charSequence664);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F664': "+ unionIndex664));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex665 = (decoder.readIndex());
+        if (unionIndex665 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, null);
+        } else {
+            if (unionIndex665 == 1) {
+                Utf8 charSequence665;
+                Object oldString665 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(665);
+                if (oldString665 instanceof Utf8) {
+                    charSequence665 = (decoder).readString(((Utf8) oldString665));
+                } else {
+                    charSequence665 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, charSequence665);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F665': "+ unionIndex665));
+            }
+        }
+        int unionIndex666 = (decoder.readIndex());
+        if (unionIndex666 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, null);
+        } else {
+            if (unionIndex666 == 1) {
+                Utf8 charSequence666;
+                Object oldString666 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(666);
+                if (oldString666 instanceof Utf8) {
+                    charSequence666 = (decoder).readString(((Utf8) oldString666));
+                } else {
+                    charSequence666 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, charSequence666);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F666': "+ unionIndex666));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex667 = (decoder.readIndex());
+        if (unionIndex667 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, null);
+        } else {
+            if (unionIndex667 == 1) {
+                Utf8 charSequence667;
+                Object oldString667 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(667);
+                if (oldString667 instanceof Utf8) {
+                    charSequence667 = (decoder).readString(((Utf8) oldString667));
+                } else {
+                    charSequence667 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, charSequence667);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F667': "+ unionIndex667));
+            }
+        }
+        int unionIndex668 = (decoder.readIndex());
+        if (unionIndex668 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, null);
+        } else {
+            if (unionIndex668 == 1) {
+                Utf8 charSequence668;
+                Object oldString668 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(668);
+                if (oldString668 instanceof Utf8) {
+                    charSequence668 = (decoder).readString(((Utf8) oldString668));
+                } else {
+                    charSequence668 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, charSequence668);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F668': "+ unionIndex668));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex669 = (decoder.readIndex());
+        if (unionIndex669 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, null);
+        } else {
+            if (unionIndex669 == 1) {
+                Utf8 charSequence669;
+                Object oldString669 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(669);
+                if (oldString669 instanceof Utf8) {
+                    charSequence669 = (decoder).readString(((Utf8) oldString669));
+                } else {
+                    charSequence669 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, charSequence669);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F669': "+ unionIndex669));
+            }
+        }
+        int unionIndex670 = (decoder.readIndex());
+        if (unionIndex670 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, null);
+        } else {
+            if (unionIndex670 == 1) {
+                Utf8 charSequence670;
+                Object oldString670 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(670);
+                if (oldString670 instanceof Utf8) {
+                    charSequence670 = (decoder).readString(((Utf8) oldString670));
+                } else {
+                    charSequence670 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, charSequence670);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F670': "+ unionIndex670));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex671 = (decoder.readIndex());
+        if (unionIndex671 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, null);
+        } else {
+            if (unionIndex671 == 1) {
+                Utf8 charSequence671;
+                Object oldString671 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(671);
+                if (oldString671 instanceof Utf8) {
+                    charSequence671 = (decoder).readString(((Utf8) oldString671));
+                } else {
+                    charSequence671 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, charSequence671);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F671': "+ unionIndex671));
+            }
+        }
+        int unionIndex672 = (decoder.readIndex());
+        if (unionIndex672 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, null);
+        } else {
+            if (unionIndex672 == 1) {
+                Utf8 charSequence672;
+                Object oldString672 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(672);
+                if (oldString672 instanceof Utf8) {
+                    charSequence672 = (decoder).readString(((Utf8) oldString672));
+                } else {
+                    charSequence672 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, charSequence672);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F672': "+ unionIndex672));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex673 = (decoder.readIndex());
+        if (unionIndex673 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, null);
+        } else {
+            if (unionIndex673 == 1) {
+                Utf8 charSequence673;
+                Object oldString673 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(673);
+                if (oldString673 instanceof Utf8) {
+                    charSequence673 = (decoder).readString(((Utf8) oldString673));
+                } else {
+                    charSequence673 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, charSequence673);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F673': "+ unionIndex673));
+            }
+        }
+        int unionIndex674 = (decoder.readIndex());
+        if (unionIndex674 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, null);
+        } else {
+            if (unionIndex674 == 1) {
+                Utf8 charSequence674;
+                Object oldString674 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(674);
+                if (oldString674 instanceof Utf8) {
+                    charSequence674 = (decoder).readString(((Utf8) oldString674));
+                } else {
+                    charSequence674 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, charSequence674);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F674': "+ unionIndex674));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex675 = (decoder.readIndex());
+        if (unionIndex675 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, null);
+        } else {
+            if (unionIndex675 == 1) {
+                Utf8 charSequence675;
+                Object oldString675 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(675);
+                if (oldString675 instanceof Utf8) {
+                    charSequence675 = (decoder).readString(((Utf8) oldString675));
+                } else {
+                    charSequence675 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, charSequence675);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F675': "+ unionIndex675));
+            }
+        }
+        int unionIndex676 = (decoder.readIndex());
+        if (unionIndex676 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, null);
+        } else {
+            if (unionIndex676 == 1) {
+                Utf8 charSequence676;
+                Object oldString676 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(676);
+                if (oldString676 instanceof Utf8) {
+                    charSequence676 = (decoder).readString(((Utf8) oldString676));
+                } else {
+                    charSequence676 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, charSequence676);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F676': "+ unionIndex676));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex677 = (decoder.readIndex());
+        if (unionIndex677 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, null);
+        } else {
+            if (unionIndex677 == 1) {
+                Utf8 charSequence677;
+                Object oldString677 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(677);
+                if (oldString677 instanceof Utf8) {
+                    charSequence677 = (decoder).readString(((Utf8) oldString677));
+                } else {
+                    charSequence677 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, charSequence677);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F677': "+ unionIndex677));
+            }
+        }
+        int unionIndex678 = (decoder.readIndex());
+        if (unionIndex678 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, null);
+        } else {
+            if (unionIndex678 == 1) {
+                Utf8 charSequence678;
+                Object oldString678 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(678);
+                if (oldString678 instanceof Utf8) {
+                    charSequence678 = (decoder).readString(((Utf8) oldString678));
+                } else {
+                    charSequence678 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, charSequence678);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F678': "+ unionIndex678));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex679 = (decoder.readIndex());
+        if (unionIndex679 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, null);
+        } else {
+            if (unionIndex679 == 1) {
+                Utf8 charSequence679;
+                Object oldString679 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(679);
+                if (oldString679 instanceof Utf8) {
+                    charSequence679 = (decoder).readString(((Utf8) oldString679));
+                } else {
+                    charSequence679 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, charSequence679);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F679': "+ unionIndex679));
+            }
+        }
+        int unionIndex680 = (decoder.readIndex());
+        if (unionIndex680 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, null);
+        } else {
+            if (unionIndex680 == 1) {
+                Utf8 charSequence680;
+                Object oldString680 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(680);
+                if (oldString680 instanceof Utf8) {
+                    charSequence680 = (decoder).readString(((Utf8) oldString680));
+                } else {
+                    charSequence680 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, charSequence680);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F680': "+ unionIndex680));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex681 = (decoder.readIndex());
+        if (unionIndex681 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, null);
+        } else {
+            if (unionIndex681 == 1) {
+                Utf8 charSequence681;
+                Object oldString681 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(681);
+                if (oldString681 instanceof Utf8) {
+                    charSequence681 = (decoder).readString(((Utf8) oldString681));
+                } else {
+                    charSequence681 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, charSequence681);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F681': "+ unionIndex681));
+            }
+        }
+        int unionIndex682 = (decoder.readIndex());
+        if (unionIndex682 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, null);
+        } else {
+            if (unionIndex682 == 1) {
+                Utf8 charSequence682;
+                Object oldString682 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(682);
+                if (oldString682 instanceof Utf8) {
+                    charSequence682 = (decoder).readString(((Utf8) oldString682));
+                } else {
+                    charSequence682 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, charSequence682);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F682': "+ unionIndex682));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex683 = (decoder.readIndex());
+        if (unionIndex683 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, null);
+        } else {
+            if (unionIndex683 == 1) {
+                Utf8 charSequence683;
+                Object oldString683 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(683);
+                if (oldString683 instanceof Utf8) {
+                    charSequence683 = (decoder).readString(((Utf8) oldString683));
+                } else {
+                    charSequence683 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, charSequence683);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F683': "+ unionIndex683));
+            }
+        }
+        int unionIndex684 = (decoder.readIndex());
+        if (unionIndex684 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, null);
+        } else {
+            if (unionIndex684 == 1) {
+                Utf8 charSequence684;
+                Object oldString684 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(684);
+                if (oldString684 instanceof Utf8) {
+                    charSequence684 = (decoder).readString(((Utf8) oldString684));
+                } else {
+                    charSequence684 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, charSequence684);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F684': "+ unionIndex684));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex685 = (decoder.readIndex());
+        if (unionIndex685 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, null);
+        } else {
+            if (unionIndex685 == 1) {
+                Utf8 charSequence685;
+                Object oldString685 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(685);
+                if (oldString685 instanceof Utf8) {
+                    charSequence685 = (decoder).readString(((Utf8) oldString685));
+                } else {
+                    charSequence685 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, charSequence685);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F685': "+ unionIndex685));
+            }
+        }
+        int unionIndex686 = (decoder.readIndex());
+        if (unionIndex686 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, null);
+        } else {
+            if (unionIndex686 == 1) {
+                Utf8 charSequence686;
+                Object oldString686 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(686);
+                if (oldString686 instanceof Utf8) {
+                    charSequence686 = (decoder).readString(((Utf8) oldString686));
+                } else {
+                    charSequence686 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, charSequence686);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F686': "+ unionIndex686));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex687 = (decoder.readIndex());
+        if (unionIndex687 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, null);
+        } else {
+            if (unionIndex687 == 1) {
+                Utf8 charSequence687;
+                Object oldString687 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(687);
+                if (oldString687 instanceof Utf8) {
+                    charSequence687 = (decoder).readString(((Utf8) oldString687));
+                } else {
+                    charSequence687 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, charSequence687);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F687': "+ unionIndex687));
+            }
+        }
+        int unionIndex688 = (decoder.readIndex());
+        if (unionIndex688 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, null);
+        } else {
+            if (unionIndex688 == 1) {
+                Utf8 charSequence688;
+                Object oldString688 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(688);
+                if (oldString688 instanceof Utf8) {
+                    charSequence688 = (decoder).readString(((Utf8) oldString688));
+                } else {
+                    charSequence688 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, charSequence688);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F688': "+ unionIndex688));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex689 = (decoder.readIndex());
+        if (unionIndex689 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, null);
+        } else {
+            if (unionIndex689 == 1) {
+                Utf8 charSequence689;
+                Object oldString689 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(689);
+                if (oldString689 instanceof Utf8) {
+                    charSequence689 = (decoder).readString(((Utf8) oldString689));
+                } else {
+                    charSequence689 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, charSequence689);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F689': "+ unionIndex689));
+            }
+        }
+        int unionIndex690 = (decoder.readIndex());
+        if (unionIndex690 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, null);
+        } else {
+            if (unionIndex690 == 1) {
+                Utf8 charSequence690;
+                Object oldString690 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(690);
+                if (oldString690 instanceof Utf8) {
+                    charSequence690 = (decoder).readString(((Utf8) oldString690));
+                } else {
+                    charSequence690 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, charSequence690);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F690': "+ unionIndex690));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex691 = (decoder.readIndex());
+        if (unionIndex691 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, null);
+        } else {
+            if (unionIndex691 == 1) {
+                Utf8 charSequence691;
+                Object oldString691 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(691);
+                if (oldString691 instanceof Utf8) {
+                    charSequence691 = (decoder).readString(((Utf8) oldString691));
+                } else {
+                    charSequence691 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, charSequence691);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F691': "+ unionIndex691));
+            }
+        }
+        int unionIndex692 = (decoder.readIndex());
+        if (unionIndex692 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, null);
+        } else {
+            if (unionIndex692 == 1) {
+                Utf8 charSequence692;
+                Object oldString692 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(692);
+                if (oldString692 instanceof Utf8) {
+                    charSequence692 = (decoder).readString(((Utf8) oldString692));
+                } else {
+                    charSequence692 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, charSequence692);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F692': "+ unionIndex692));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex693 = (decoder.readIndex());
+        if (unionIndex693 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, null);
+        } else {
+            if (unionIndex693 == 1) {
+                Utf8 charSequence693;
+                Object oldString693 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(693);
+                if (oldString693 instanceof Utf8) {
+                    charSequence693 = (decoder).readString(((Utf8) oldString693));
+                } else {
+                    charSequence693 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, charSequence693);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F693': "+ unionIndex693));
+            }
+        }
+        int unionIndex694 = (decoder.readIndex());
+        if (unionIndex694 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, null);
+        } else {
+            if (unionIndex694 == 1) {
+                Utf8 charSequence694;
+                Object oldString694 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(694);
+                if (oldString694 instanceof Utf8) {
+                    charSequence694 = (decoder).readString(((Utf8) oldString694));
+                } else {
+                    charSequence694 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, charSequence694);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F694': "+ unionIndex694));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex695 = (decoder.readIndex());
+        if (unionIndex695 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, null);
+        } else {
+            if (unionIndex695 == 1) {
+                Utf8 charSequence695;
+                Object oldString695 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(695);
+                if (oldString695 instanceof Utf8) {
+                    charSequence695 = (decoder).readString(((Utf8) oldString695));
+                } else {
+                    charSequence695 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, charSequence695);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F695': "+ unionIndex695));
+            }
+        }
+        int unionIndex696 = (decoder.readIndex());
+        if (unionIndex696 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, null);
+        } else {
+            if (unionIndex696 == 1) {
+                Utf8 charSequence696;
+                Object oldString696 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(696);
+                if (oldString696 instanceof Utf8) {
+                    charSequence696 = (decoder).readString(((Utf8) oldString696));
+                } else {
+                    charSequence696 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, charSequence696);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F696': "+ unionIndex696));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex697 = (decoder.readIndex());
+        if (unionIndex697 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, null);
+        } else {
+            if (unionIndex697 == 1) {
+                Utf8 charSequence697;
+                Object oldString697 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(697);
+                if (oldString697 instanceof Utf8) {
+                    charSequence697 = (decoder).readString(((Utf8) oldString697));
+                } else {
+                    charSequence697 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, charSequence697);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F697': "+ unionIndex697));
+            }
+        }
+        int unionIndex698 = (decoder.readIndex());
+        if (unionIndex698 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, null);
+        } else {
+            if (unionIndex698 == 1) {
+                Utf8 charSequence698;
+                Object oldString698 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(698);
+                if (oldString698 instanceof Utf8) {
+                    charSequence698 = (decoder).readString(((Utf8) oldString698));
+                } else {
+                    charSequence698 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, charSequence698);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F698': "+ unionIndex698));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex699 = (decoder.readIndex());
+        if (unionIndex699 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, null);
+        } else {
+            if (unionIndex699 == 1) {
+                Utf8 charSequence699;
+                Object oldString699 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(699);
+                if (oldString699 instanceof Utf8) {
+                    charSequence699 = (decoder).readString(((Utf8) oldString699));
+                } else {
+                    charSequence699 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, charSequence699);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F699': "+ unionIndex699));
+            }
+        }
+        int unionIndex700 = (decoder.readIndex());
+        if (unionIndex700 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, null);
+        } else {
+            if (unionIndex700 == 1) {
+                Utf8 charSequence700;
+                Object oldString700 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(700);
+                if (oldString700 instanceof Utf8) {
+                    charSequence700 = (decoder).readString(((Utf8) oldString700));
+                } else {
+                    charSequence700 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, charSequence700);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F700': "+ unionIndex700));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex701 = (decoder.readIndex());
+        if (unionIndex701 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, null);
+        } else {
+            if (unionIndex701 == 1) {
+                Utf8 charSequence701;
+                Object oldString701 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(701);
+                if (oldString701 instanceof Utf8) {
+                    charSequence701 = (decoder).readString(((Utf8) oldString701));
+                } else {
+                    charSequence701 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, charSequence701);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F701': "+ unionIndex701));
+            }
+        }
+        int unionIndex702 = (decoder.readIndex());
+        if (unionIndex702 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, null);
+        } else {
+            if (unionIndex702 == 1) {
+                Utf8 charSequence702;
+                Object oldString702 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(702);
+                if (oldString702 instanceof Utf8) {
+                    charSequence702 = (decoder).readString(((Utf8) oldString702));
+                } else {
+                    charSequence702 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, charSequence702);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F702': "+ unionIndex702));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex703 = (decoder.readIndex());
+        if (unionIndex703 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, null);
+        } else {
+            if (unionIndex703 == 1) {
+                Utf8 charSequence703;
+                Object oldString703 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(703);
+                if (oldString703 instanceof Utf8) {
+                    charSequence703 = (decoder).readString(((Utf8) oldString703));
+                } else {
+                    charSequence703 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, charSequence703);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F703': "+ unionIndex703));
+            }
+        }
+        int unionIndex704 = (decoder.readIndex());
+        if (unionIndex704 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, null);
+        } else {
+            if (unionIndex704 == 1) {
+                Utf8 charSequence704;
+                Object oldString704 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(704);
+                if (oldString704 instanceof Utf8) {
+                    charSequence704 = (decoder).readString(((Utf8) oldString704));
+                } else {
+                    charSequence704 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, charSequence704);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F704': "+ unionIndex704));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex705 = (decoder.readIndex());
+        if (unionIndex705 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, null);
+        } else {
+            if (unionIndex705 == 1) {
+                Utf8 charSequence705;
+                Object oldString705 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(705);
+                if (oldString705 instanceof Utf8) {
+                    charSequence705 = (decoder).readString(((Utf8) oldString705));
+                } else {
+                    charSequence705 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, charSequence705);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F705': "+ unionIndex705));
+            }
+        }
+        int unionIndex706 = (decoder.readIndex());
+        if (unionIndex706 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, null);
+        } else {
+            if (unionIndex706 == 1) {
+                Utf8 charSequence706;
+                Object oldString706 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(706);
+                if (oldString706 instanceof Utf8) {
+                    charSequence706 = (decoder).readString(((Utf8) oldString706));
+                } else {
+                    charSequence706 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, charSequence706);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F706': "+ unionIndex706));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex707 = (decoder.readIndex());
+        if (unionIndex707 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, null);
+        } else {
+            if (unionIndex707 == 1) {
+                Utf8 charSequence707;
+                Object oldString707 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(707);
+                if (oldString707 instanceof Utf8) {
+                    charSequence707 = (decoder).readString(((Utf8) oldString707));
+                } else {
+                    charSequence707 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, charSequence707);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F707': "+ unionIndex707));
+            }
+        }
+        int unionIndex708 = (decoder.readIndex());
+        if (unionIndex708 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, null);
+        } else {
+            if (unionIndex708 == 1) {
+                Utf8 charSequence708;
+                Object oldString708 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(708);
+                if (oldString708 instanceof Utf8) {
+                    charSequence708 = (decoder).readString(((Utf8) oldString708));
+                } else {
+                    charSequence708 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, charSequence708);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F708': "+ unionIndex708));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex709 = (decoder.readIndex());
+        if (unionIndex709 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, null);
+        } else {
+            if (unionIndex709 == 1) {
+                Utf8 charSequence709;
+                Object oldString709 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(709);
+                if (oldString709 instanceof Utf8) {
+                    charSequence709 = (decoder).readString(((Utf8) oldString709));
+                } else {
+                    charSequence709 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, charSequence709);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F709': "+ unionIndex709));
+            }
+        }
+        int unionIndex710 = (decoder.readIndex());
+        if (unionIndex710 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, null);
+        } else {
+            if (unionIndex710 == 1) {
+                Utf8 charSequence710;
+                Object oldString710 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(710);
+                if (oldString710 instanceof Utf8) {
+                    charSequence710 = (decoder).readString(((Utf8) oldString710));
+                } else {
+                    charSequence710 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, charSequence710);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F710': "+ unionIndex710));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex711 = (decoder.readIndex());
+        if (unionIndex711 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, null);
+        } else {
+            if (unionIndex711 == 1) {
+                Utf8 charSequence711;
+                Object oldString711 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(711);
+                if (oldString711 instanceof Utf8) {
+                    charSequence711 = (decoder).readString(((Utf8) oldString711));
+                } else {
+                    charSequence711 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, charSequence711);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F711': "+ unionIndex711));
+            }
+        }
+        int unionIndex712 = (decoder.readIndex());
+        if (unionIndex712 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, null);
+        } else {
+            if (unionIndex712 == 1) {
+                Utf8 charSequence712;
+                Object oldString712 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(712);
+                if (oldString712 instanceof Utf8) {
+                    charSequence712 = (decoder).readString(((Utf8) oldString712));
+                } else {
+                    charSequence712 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, charSequence712);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F712': "+ unionIndex712));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex713 = (decoder.readIndex());
+        if (unionIndex713 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, null);
+        } else {
+            if (unionIndex713 == 1) {
+                Utf8 charSequence713;
+                Object oldString713 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(713);
+                if (oldString713 instanceof Utf8) {
+                    charSequence713 = (decoder).readString(((Utf8) oldString713));
+                } else {
+                    charSequence713 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, charSequence713);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F713': "+ unionIndex713));
+            }
+        }
+        int unionIndex714 = (decoder.readIndex());
+        if (unionIndex714 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, null);
+        } else {
+            if (unionIndex714 == 1) {
+                Utf8 charSequence714;
+                Object oldString714 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(714);
+                if (oldString714 instanceof Utf8) {
+                    charSequence714 = (decoder).readString(((Utf8) oldString714));
+                } else {
+                    charSequence714 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, charSequence714);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F714': "+ unionIndex714));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex715 = (decoder.readIndex());
+        if (unionIndex715 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, null);
+        } else {
+            if (unionIndex715 == 1) {
+                Utf8 charSequence715;
+                Object oldString715 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(715);
+                if (oldString715 instanceof Utf8) {
+                    charSequence715 = (decoder).readString(((Utf8) oldString715));
+                } else {
+                    charSequence715 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, charSequence715);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F715': "+ unionIndex715));
+            }
+        }
+        int unionIndex716 = (decoder.readIndex());
+        if (unionIndex716 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, null);
+        } else {
+            if (unionIndex716 == 1) {
+                Utf8 charSequence716;
+                Object oldString716 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(716);
+                if (oldString716 instanceof Utf8) {
+                    charSequence716 = (decoder).readString(((Utf8) oldString716));
+                } else {
+                    charSequence716 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, charSequence716);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F716': "+ unionIndex716));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex717 = (decoder.readIndex());
+        if (unionIndex717 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, null);
+        } else {
+            if (unionIndex717 == 1) {
+                Utf8 charSequence717;
+                Object oldString717 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(717);
+                if (oldString717 instanceof Utf8) {
+                    charSequence717 = (decoder).readString(((Utf8) oldString717));
+                } else {
+                    charSequence717 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, charSequence717);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F717': "+ unionIndex717));
+            }
+        }
+        int unionIndex718 = (decoder.readIndex());
+        if (unionIndex718 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, null);
+        } else {
+            if (unionIndex718 == 1) {
+                Utf8 charSequence718;
+                Object oldString718 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(718);
+                if (oldString718 instanceof Utf8) {
+                    charSequence718 = (decoder).readString(((Utf8) oldString718));
+                } else {
+                    charSequence718 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, charSequence718);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F718': "+ unionIndex718));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex719 = (decoder.readIndex());
+        if (unionIndex719 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, null);
+        } else {
+            if (unionIndex719 == 1) {
+                Utf8 charSequence719;
+                Object oldString719 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(719);
+                if (oldString719 instanceof Utf8) {
+                    charSequence719 = (decoder).readString(((Utf8) oldString719));
+                } else {
+                    charSequence719 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, charSequence719);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F719': "+ unionIndex719));
+            }
+        }
+        int unionIndex720 = (decoder.readIndex());
+        if (unionIndex720 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, null);
+        } else {
+            if (unionIndex720 == 1) {
+                Utf8 charSequence720;
+                Object oldString720 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(720);
+                if (oldString720 instanceof Utf8) {
+                    charSequence720 = (decoder).readString(((Utf8) oldString720));
+                } else {
+                    charSequence720 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, charSequence720);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F720': "+ unionIndex720));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex721 = (decoder.readIndex());
+        if (unionIndex721 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, null);
+        } else {
+            if (unionIndex721 == 1) {
+                Utf8 charSequence721;
+                Object oldString721 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(721);
+                if (oldString721 instanceof Utf8) {
+                    charSequence721 = (decoder).readString(((Utf8) oldString721));
+                } else {
+                    charSequence721 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, charSequence721);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F721': "+ unionIndex721));
+            }
+        }
+        int unionIndex722 = (decoder.readIndex());
+        if (unionIndex722 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, null);
+        } else {
+            if (unionIndex722 == 1) {
+                Utf8 charSequence722;
+                Object oldString722 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(722);
+                if (oldString722 instanceof Utf8) {
+                    charSequence722 = (decoder).readString(((Utf8) oldString722));
+                } else {
+                    charSequence722 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, charSequence722);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F722': "+ unionIndex722));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex723 = (decoder.readIndex());
+        if (unionIndex723 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, null);
+        } else {
+            if (unionIndex723 == 1) {
+                Utf8 charSequence723;
+                Object oldString723 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(723);
+                if (oldString723 instanceof Utf8) {
+                    charSequence723 = (decoder).readString(((Utf8) oldString723));
+                } else {
+                    charSequence723 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, charSequence723);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F723': "+ unionIndex723));
+            }
+        }
+        int unionIndex724 = (decoder.readIndex());
+        if (unionIndex724 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, null);
+        } else {
+            if (unionIndex724 == 1) {
+                Utf8 charSequence724;
+                Object oldString724 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(724);
+                if (oldString724 instanceof Utf8) {
+                    charSequence724 = (decoder).readString(((Utf8) oldString724));
+                } else {
+                    charSequence724 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, charSequence724);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F724': "+ unionIndex724));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex725 = (decoder.readIndex());
+        if (unionIndex725 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, null);
+        } else {
+            if (unionIndex725 == 1) {
+                Utf8 charSequence725;
+                Object oldString725 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(725);
+                if (oldString725 instanceof Utf8) {
+                    charSequence725 = (decoder).readString(((Utf8) oldString725));
+                } else {
+                    charSequence725 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, charSequence725);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F725': "+ unionIndex725));
+            }
+        }
+        int unionIndex726 = (decoder.readIndex());
+        if (unionIndex726 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, null);
+        } else {
+            if (unionIndex726 == 1) {
+                Utf8 charSequence726;
+                Object oldString726 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(726);
+                if (oldString726 instanceof Utf8) {
+                    charSequence726 = (decoder).readString(((Utf8) oldString726));
+                } else {
+                    charSequence726 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, charSequence726);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F726': "+ unionIndex726));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex727 = (decoder.readIndex());
+        if (unionIndex727 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, null);
+        } else {
+            if (unionIndex727 == 1) {
+                Utf8 charSequence727;
+                Object oldString727 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(727);
+                if (oldString727 instanceof Utf8) {
+                    charSequence727 = (decoder).readString(((Utf8) oldString727));
+                } else {
+                    charSequence727 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, charSequence727);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F727': "+ unionIndex727));
+            }
+        }
+        int unionIndex728 = (decoder.readIndex());
+        if (unionIndex728 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, null);
+        } else {
+            if (unionIndex728 == 1) {
+                Utf8 charSequence728;
+                Object oldString728 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(728);
+                if (oldString728 instanceof Utf8) {
+                    charSequence728 = (decoder).readString(((Utf8) oldString728));
+                } else {
+                    charSequence728 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, charSequence728);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F728': "+ unionIndex728));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex729 = (decoder.readIndex());
+        if (unionIndex729 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, null);
+        } else {
+            if (unionIndex729 == 1) {
+                Utf8 charSequence729;
+                Object oldString729 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(729);
+                if (oldString729 instanceof Utf8) {
+                    charSequence729 = (decoder).readString(((Utf8) oldString729));
+                } else {
+                    charSequence729 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, charSequence729);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F729': "+ unionIndex729));
+            }
+        }
+        int unionIndex730 = (decoder.readIndex());
+        if (unionIndex730 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, null);
+        } else {
+            if (unionIndex730 == 1) {
+                Utf8 charSequence730;
+                Object oldString730 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(730);
+                if (oldString730 instanceof Utf8) {
+                    charSequence730 = (decoder).readString(((Utf8) oldString730));
+                } else {
+                    charSequence730 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, charSequence730);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F730': "+ unionIndex730));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex731 = (decoder.readIndex());
+        if (unionIndex731 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, null);
+        } else {
+            if (unionIndex731 == 1) {
+                Utf8 charSequence731;
+                Object oldString731 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(731);
+                if (oldString731 instanceof Utf8) {
+                    charSequence731 = (decoder).readString(((Utf8) oldString731));
+                } else {
+                    charSequence731 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, charSequence731);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F731': "+ unionIndex731));
+            }
+        }
+        int unionIndex732 = (decoder.readIndex());
+        if (unionIndex732 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, null);
+        } else {
+            if (unionIndex732 == 1) {
+                Utf8 charSequence732;
+                Object oldString732 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(732);
+                if (oldString732 instanceof Utf8) {
+                    charSequence732 = (decoder).readString(((Utf8) oldString732));
+                } else {
+                    charSequence732 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, charSequence732);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F732': "+ unionIndex732));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex733 = (decoder.readIndex());
+        if (unionIndex733 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, null);
+        } else {
+            if (unionIndex733 == 1) {
+                Utf8 charSequence733;
+                Object oldString733 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(733);
+                if (oldString733 instanceof Utf8) {
+                    charSequence733 = (decoder).readString(((Utf8) oldString733));
+                } else {
+                    charSequence733 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, charSequence733);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F733': "+ unionIndex733));
+            }
+        }
+        int unionIndex734 = (decoder.readIndex());
+        if (unionIndex734 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, null);
+        } else {
+            if (unionIndex734 == 1) {
+                Utf8 charSequence734;
+                Object oldString734 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(734);
+                if (oldString734 instanceof Utf8) {
+                    charSequence734 = (decoder).readString(((Utf8) oldString734));
+                } else {
+                    charSequence734 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, charSequence734);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F734': "+ unionIndex734));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex735 = (decoder.readIndex());
+        if (unionIndex735 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, null);
+        } else {
+            if (unionIndex735 == 1) {
+                Utf8 charSequence735;
+                Object oldString735 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(735);
+                if (oldString735 instanceof Utf8) {
+                    charSequence735 = (decoder).readString(((Utf8) oldString735));
+                } else {
+                    charSequence735 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, charSequence735);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F735': "+ unionIndex735));
+            }
+        }
+        int unionIndex736 = (decoder.readIndex());
+        if (unionIndex736 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, null);
+        } else {
+            if (unionIndex736 == 1) {
+                Utf8 charSequence736;
+                Object oldString736 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(736);
+                if (oldString736 instanceof Utf8) {
+                    charSequence736 = (decoder).readString(((Utf8) oldString736));
+                } else {
+                    charSequence736 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, charSequence736);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F736': "+ unionIndex736));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex737 = (decoder.readIndex());
+        if (unionIndex737 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, null);
+        } else {
+            if (unionIndex737 == 1) {
+                Utf8 charSequence737;
+                Object oldString737 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(737);
+                if (oldString737 instanceof Utf8) {
+                    charSequence737 = (decoder).readString(((Utf8) oldString737));
+                } else {
+                    charSequence737 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, charSequence737);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F737': "+ unionIndex737));
+            }
+        }
+        int unionIndex738 = (decoder.readIndex());
+        if (unionIndex738 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, null);
+        } else {
+            if (unionIndex738 == 1) {
+                Utf8 charSequence738;
+                Object oldString738 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(738);
+                if (oldString738 instanceof Utf8) {
+                    charSequence738 = (decoder).readString(((Utf8) oldString738));
+                } else {
+                    charSequence738 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, charSequence738);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F738': "+ unionIndex738));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex739 = (decoder.readIndex());
+        if (unionIndex739 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, null);
+        } else {
+            if (unionIndex739 == 1) {
+                Utf8 charSequence739;
+                Object oldString739 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(739);
+                if (oldString739 instanceof Utf8) {
+                    charSequence739 = (decoder).readString(((Utf8) oldString739));
+                } else {
+                    charSequence739 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, charSequence739);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F739': "+ unionIndex739));
+            }
+        }
+        int unionIndex740 = (decoder.readIndex());
+        if (unionIndex740 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, null);
+        } else {
+            if (unionIndex740 == 1) {
+                Utf8 charSequence740;
+                Object oldString740 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(740);
+                if (oldString740 instanceof Utf8) {
+                    charSequence740 = (decoder).readString(((Utf8) oldString740));
+                } else {
+                    charSequence740 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, charSequence740);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F740': "+ unionIndex740));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex741 = (decoder.readIndex());
+        if (unionIndex741 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, null);
+        } else {
+            if (unionIndex741 == 1) {
+                Utf8 charSequence741;
+                Object oldString741 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(741);
+                if (oldString741 instanceof Utf8) {
+                    charSequence741 = (decoder).readString(((Utf8) oldString741));
+                } else {
+                    charSequence741 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, charSequence741);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F741': "+ unionIndex741));
+            }
+        }
+        int unionIndex742 = (decoder.readIndex());
+        if (unionIndex742 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, null);
+        } else {
+            if (unionIndex742 == 1) {
+                Utf8 charSequence742;
+                Object oldString742 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(742);
+                if (oldString742 instanceof Utf8) {
+                    charSequence742 = (decoder).readString(((Utf8) oldString742));
+                } else {
+                    charSequence742 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, charSequence742);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F742': "+ unionIndex742));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex743 = (decoder.readIndex());
+        if (unionIndex743 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, null);
+        } else {
+            if (unionIndex743 == 1) {
+                Utf8 charSequence743;
+                Object oldString743 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(743);
+                if (oldString743 instanceof Utf8) {
+                    charSequence743 = (decoder).readString(((Utf8) oldString743));
+                } else {
+                    charSequence743 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, charSequence743);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F743': "+ unionIndex743));
+            }
+        }
+        int unionIndex744 = (decoder.readIndex());
+        if (unionIndex744 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, null);
+        } else {
+            if (unionIndex744 == 1) {
+                Utf8 charSequence744;
+                Object oldString744 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(744);
+                if (oldString744 instanceof Utf8) {
+                    charSequence744 = (decoder).readString(((Utf8) oldString744));
+                } else {
+                    charSequence744 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, charSequence744);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F744': "+ unionIndex744));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex745 = (decoder.readIndex());
+        if (unionIndex745 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, null);
+        } else {
+            if (unionIndex745 == 1) {
+                Utf8 charSequence745;
+                Object oldString745 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(745);
+                if (oldString745 instanceof Utf8) {
+                    charSequence745 = (decoder).readString(((Utf8) oldString745));
+                } else {
+                    charSequence745 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, charSequence745);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F745': "+ unionIndex745));
+            }
+        }
+        int unionIndex746 = (decoder.readIndex());
+        if (unionIndex746 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, null);
+        } else {
+            if (unionIndex746 == 1) {
+                Utf8 charSequence746;
+                Object oldString746 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(746);
+                if (oldString746 instanceof Utf8) {
+                    charSequence746 = (decoder).readString(((Utf8) oldString746));
+                } else {
+                    charSequence746 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, charSequence746);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F746': "+ unionIndex746));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex747 = (decoder.readIndex());
+        if (unionIndex747 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, null);
+        } else {
+            if (unionIndex747 == 1) {
+                Utf8 charSequence747;
+                Object oldString747 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(747);
+                if (oldString747 instanceof Utf8) {
+                    charSequence747 = (decoder).readString(((Utf8) oldString747));
+                } else {
+                    charSequence747 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, charSequence747);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F747': "+ unionIndex747));
+            }
+        }
+        int unionIndex748 = (decoder.readIndex());
+        if (unionIndex748 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, null);
+        } else {
+            if (unionIndex748 == 1) {
+                Utf8 charSequence748;
+                Object oldString748 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(748);
+                if (oldString748 instanceof Utf8) {
+                    charSequence748 = (decoder).readString(((Utf8) oldString748));
+                } else {
+                    charSequence748 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, charSequence748);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F748': "+ unionIndex748));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex749 = (decoder.readIndex());
+        if (unionIndex749 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, null);
+        } else {
+            if (unionIndex749 == 1) {
+                Utf8 charSequence749;
+                Object oldString749 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(749);
+                if (oldString749 instanceof Utf8) {
+                    charSequence749 = (decoder).readString(((Utf8) oldString749));
+                } else {
+                    charSequence749 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, charSequence749);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F749': "+ unionIndex749));
+            }
+        }
+        int unionIndex750 = (decoder.readIndex());
+        if (unionIndex750 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, null);
+        } else {
+            if (unionIndex750 == 1) {
+                Utf8 charSequence750;
+                Object oldString750 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(750);
+                if (oldString750 instanceof Utf8) {
+                    charSequence750 = (decoder).readString(((Utf8) oldString750));
+                } else {
+                    charSequence750 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, charSequence750);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F750': "+ unionIndex750));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex751 = (decoder.readIndex());
+        if (unionIndex751 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, null);
+        } else {
+            if (unionIndex751 == 1) {
+                Utf8 charSequence751;
+                Object oldString751 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(751);
+                if (oldString751 instanceof Utf8) {
+                    charSequence751 = (decoder).readString(((Utf8) oldString751));
+                } else {
+                    charSequence751 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, charSequence751);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F751': "+ unionIndex751));
+            }
+        }
+        int unionIndex752 = (decoder.readIndex());
+        if (unionIndex752 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, null);
+        } else {
+            if (unionIndex752 == 1) {
+                Utf8 charSequence752;
+                Object oldString752 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(752);
+                if (oldString752 instanceof Utf8) {
+                    charSequence752 = (decoder).readString(((Utf8) oldString752));
+                } else {
+                    charSequence752 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, charSequence752);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F752': "+ unionIndex752));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex753 = (decoder.readIndex());
+        if (unionIndex753 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, null);
+        } else {
+            if (unionIndex753 == 1) {
+                Utf8 charSequence753;
+                Object oldString753 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(753);
+                if (oldString753 instanceof Utf8) {
+                    charSequence753 = (decoder).readString(((Utf8) oldString753));
+                } else {
+                    charSequence753 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, charSequence753);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F753': "+ unionIndex753));
+            }
+        }
+        int unionIndex754 = (decoder.readIndex());
+        if (unionIndex754 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, null);
+        } else {
+            if (unionIndex754 == 1) {
+                Utf8 charSequence754;
+                Object oldString754 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(754);
+                if (oldString754 instanceof Utf8) {
+                    charSequence754 = (decoder).readString(((Utf8) oldString754));
+                } else {
+                    charSequence754 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, charSequence754);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F754': "+ unionIndex754));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex755 = (decoder.readIndex());
+        if (unionIndex755 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, null);
+        } else {
+            if (unionIndex755 == 1) {
+                Utf8 charSequence755;
+                Object oldString755 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(755);
+                if (oldString755 instanceof Utf8) {
+                    charSequence755 = (decoder).readString(((Utf8) oldString755));
+                } else {
+                    charSequence755 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, charSequence755);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F755': "+ unionIndex755));
+            }
+        }
+        int unionIndex756 = (decoder.readIndex());
+        if (unionIndex756 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, null);
+        } else {
+            if (unionIndex756 == 1) {
+                Utf8 charSequence756;
+                Object oldString756 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(756);
+                if (oldString756 instanceof Utf8) {
+                    charSequence756 = (decoder).readString(((Utf8) oldString756));
+                } else {
+                    charSequence756 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, charSequence756);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F756': "+ unionIndex756));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex757 = (decoder.readIndex());
+        if (unionIndex757 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, null);
+        } else {
+            if (unionIndex757 == 1) {
+                Utf8 charSequence757;
+                Object oldString757 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(757);
+                if (oldString757 instanceof Utf8) {
+                    charSequence757 = (decoder).readString(((Utf8) oldString757));
+                } else {
+                    charSequence757 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, charSequence757);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F757': "+ unionIndex757));
+            }
+        }
+        int unionIndex758 = (decoder.readIndex());
+        if (unionIndex758 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, null);
+        } else {
+            if (unionIndex758 == 1) {
+                Utf8 charSequence758;
+                Object oldString758 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(758);
+                if (oldString758 instanceof Utf8) {
+                    charSequence758 = (decoder).readString(((Utf8) oldString758));
+                } else {
+                    charSequence758 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, charSequence758);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F758': "+ unionIndex758));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex759 = (decoder.readIndex());
+        if (unionIndex759 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, null);
+        } else {
+            if (unionIndex759 == 1) {
+                Utf8 charSequence759;
+                Object oldString759 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(759);
+                if (oldString759 instanceof Utf8) {
+                    charSequence759 = (decoder).readString(((Utf8) oldString759));
+                } else {
+                    charSequence759 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, charSequence759);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F759': "+ unionIndex759));
+            }
+        }
+        int unionIndex760 = (decoder.readIndex());
+        if (unionIndex760 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, null);
+        } else {
+            if (unionIndex760 == 1) {
+                Utf8 charSequence760;
+                Object oldString760 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(760);
+                if (oldString760 instanceof Utf8) {
+                    charSequence760 = (decoder).readString(((Utf8) oldString760));
+                } else {
+                    charSequence760 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, charSequence760);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F760': "+ unionIndex760));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex761 = (decoder.readIndex());
+        if (unionIndex761 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, null);
+        } else {
+            if (unionIndex761 == 1) {
+                Utf8 charSequence761;
+                Object oldString761 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(761);
+                if (oldString761 instanceof Utf8) {
+                    charSequence761 = (decoder).readString(((Utf8) oldString761));
+                } else {
+                    charSequence761 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, charSequence761);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F761': "+ unionIndex761));
+            }
+        }
+        int unionIndex762 = (decoder.readIndex());
+        if (unionIndex762 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, null);
+        } else {
+            if (unionIndex762 == 1) {
+                Utf8 charSequence762;
+                Object oldString762 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(762);
+                if (oldString762 instanceof Utf8) {
+                    charSequence762 = (decoder).readString(((Utf8) oldString762));
+                } else {
+                    charSequence762 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, charSequence762);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F762': "+ unionIndex762));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex763 = (decoder.readIndex());
+        if (unionIndex763 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, null);
+        } else {
+            if (unionIndex763 == 1) {
+                Utf8 charSequence763;
+                Object oldString763 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(763);
+                if (oldString763 instanceof Utf8) {
+                    charSequence763 = (decoder).readString(((Utf8) oldString763));
+                } else {
+                    charSequence763 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, charSequence763);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F763': "+ unionIndex763));
+            }
+        }
+        int unionIndex764 = (decoder.readIndex());
+        if (unionIndex764 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, null);
+        } else {
+            if (unionIndex764 == 1) {
+                Utf8 charSequence764;
+                Object oldString764 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(764);
+                if (oldString764 instanceof Utf8) {
+                    charSequence764 = (decoder).readString(((Utf8) oldString764));
+                } else {
+                    charSequence764 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, charSequence764);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F764': "+ unionIndex764));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex765 = (decoder.readIndex());
+        if (unionIndex765 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, null);
+        } else {
+            if (unionIndex765 == 1) {
+                Utf8 charSequence765;
+                Object oldString765 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(765);
+                if (oldString765 instanceof Utf8) {
+                    charSequence765 = (decoder).readString(((Utf8) oldString765));
+                } else {
+                    charSequence765 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, charSequence765);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F765': "+ unionIndex765));
+            }
+        }
+        int unionIndex766 = (decoder.readIndex());
+        if (unionIndex766 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, null);
+        } else {
+            if (unionIndex766 == 1) {
+                Utf8 charSequence766;
+                Object oldString766 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(766);
+                if (oldString766 instanceof Utf8) {
+                    charSequence766 = (decoder).readString(((Utf8) oldString766));
+                } else {
+                    charSequence766 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, charSequence766);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F766': "+ unionIndex766));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex767 = (decoder.readIndex());
+        if (unionIndex767 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, null);
+        } else {
+            if (unionIndex767 == 1) {
+                Utf8 charSequence767;
+                Object oldString767 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(767);
+                if (oldString767 instanceof Utf8) {
+                    charSequence767 = (decoder).readString(((Utf8) oldString767));
+                } else {
+                    charSequence767 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, charSequence767);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F767': "+ unionIndex767));
+            }
+        }
+        int unionIndex768 = (decoder.readIndex());
+        if (unionIndex768 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, null);
+        } else {
+            if (unionIndex768 == 1) {
+                Utf8 charSequence768;
+                Object oldString768 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(768);
+                if (oldString768 instanceof Utf8) {
+                    charSequence768 = (decoder).readString(((Utf8) oldString768));
+                } else {
+                    charSequence768 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, charSequence768);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F768': "+ unionIndex768));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex769 = (decoder.readIndex());
+        if (unionIndex769 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, null);
+        } else {
+            if (unionIndex769 == 1) {
+                Utf8 charSequence769;
+                Object oldString769 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(769);
+                if (oldString769 instanceof Utf8) {
+                    charSequence769 = (decoder).readString(((Utf8) oldString769));
+                } else {
+                    charSequence769 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, charSequence769);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F769': "+ unionIndex769));
+            }
+        }
+        int unionIndex770 = (decoder.readIndex());
+        if (unionIndex770 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, null);
+        } else {
+            if (unionIndex770 == 1) {
+                Utf8 charSequence770;
+                Object oldString770 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(770);
+                if (oldString770 instanceof Utf8) {
+                    charSequence770 = (decoder).readString(((Utf8) oldString770));
+                } else {
+                    charSequence770 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, charSequence770);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F770': "+ unionIndex770));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex771 = (decoder.readIndex());
+        if (unionIndex771 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, null);
+        } else {
+            if (unionIndex771 == 1) {
+                Utf8 charSequence771;
+                Object oldString771 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(771);
+                if (oldString771 instanceof Utf8) {
+                    charSequence771 = (decoder).readString(((Utf8) oldString771));
+                } else {
+                    charSequence771 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, charSequence771);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F771': "+ unionIndex771));
+            }
+        }
+        int unionIndex772 = (decoder.readIndex());
+        if (unionIndex772 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, null);
+        } else {
+            if (unionIndex772 == 1) {
+                Utf8 charSequence772;
+                Object oldString772 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(772);
+                if (oldString772 instanceof Utf8) {
+                    charSequence772 = (decoder).readString(((Utf8) oldString772));
+                } else {
+                    charSequence772 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, charSequence772);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F772': "+ unionIndex772));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex773 = (decoder.readIndex());
+        if (unionIndex773 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, null);
+        } else {
+            if (unionIndex773 == 1) {
+                Utf8 charSequence773;
+                Object oldString773 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(773);
+                if (oldString773 instanceof Utf8) {
+                    charSequence773 = (decoder).readString(((Utf8) oldString773));
+                } else {
+                    charSequence773 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, charSequence773);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F773': "+ unionIndex773));
+            }
+        }
+        int unionIndex774 = (decoder.readIndex());
+        if (unionIndex774 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, null);
+        } else {
+            if (unionIndex774 == 1) {
+                Utf8 charSequence774;
+                Object oldString774 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(774);
+                if (oldString774 instanceof Utf8) {
+                    charSequence774 = (decoder).readString(((Utf8) oldString774));
+                } else {
+                    charSequence774 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, charSequence774);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F774': "+ unionIndex774));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex775 = (decoder.readIndex());
+        if (unionIndex775 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, null);
+        } else {
+            if (unionIndex775 == 1) {
+                Utf8 charSequence775;
+                Object oldString775 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(775);
+                if (oldString775 instanceof Utf8) {
+                    charSequence775 = (decoder).readString(((Utf8) oldString775));
+                } else {
+                    charSequence775 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, charSequence775);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F775': "+ unionIndex775));
+            }
+        }
+        int unionIndex776 = (decoder.readIndex());
+        if (unionIndex776 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, null);
+        } else {
+            if (unionIndex776 == 1) {
+                Utf8 charSequence776;
+                Object oldString776 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(776);
+                if (oldString776 instanceof Utf8) {
+                    charSequence776 = (decoder).readString(((Utf8) oldString776));
+                } else {
+                    charSequence776 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, charSequence776);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F776': "+ unionIndex776));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex777 = (decoder.readIndex());
+        if (unionIndex777 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, null);
+        } else {
+            if (unionIndex777 == 1) {
+                Utf8 charSequence777;
+                Object oldString777 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(777);
+                if (oldString777 instanceof Utf8) {
+                    charSequence777 = (decoder).readString(((Utf8) oldString777));
+                } else {
+                    charSequence777 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, charSequence777);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F777': "+ unionIndex777));
+            }
+        }
+        int unionIndex778 = (decoder.readIndex());
+        if (unionIndex778 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, null);
+        } else {
+            if (unionIndex778 == 1) {
+                Utf8 charSequence778;
+                Object oldString778 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(778);
+                if (oldString778 instanceof Utf8) {
+                    charSequence778 = (decoder).readString(((Utf8) oldString778));
+                } else {
+                    charSequence778 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, charSequence778);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F778': "+ unionIndex778));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex779 = (decoder.readIndex());
+        if (unionIndex779 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, null);
+        } else {
+            if (unionIndex779 == 1) {
+                Utf8 charSequence779;
+                Object oldString779 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(779);
+                if (oldString779 instanceof Utf8) {
+                    charSequence779 = (decoder).readString(((Utf8) oldString779));
+                } else {
+                    charSequence779 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, charSequence779);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F779': "+ unionIndex779));
+            }
+        }
+        int unionIndex780 = (decoder.readIndex());
+        if (unionIndex780 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, null);
+        } else {
+            if (unionIndex780 == 1) {
+                Utf8 charSequence780;
+                Object oldString780 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(780);
+                if (oldString780 instanceof Utf8) {
+                    charSequence780 = (decoder).readString(((Utf8) oldString780));
+                } else {
+                    charSequence780 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, charSequence780);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F780': "+ unionIndex780));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex781 = (decoder.readIndex());
+        if (unionIndex781 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, null);
+        } else {
+            if (unionIndex781 == 1) {
+                Utf8 charSequence781;
+                Object oldString781 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(781);
+                if (oldString781 instanceof Utf8) {
+                    charSequence781 = (decoder).readString(((Utf8) oldString781));
+                } else {
+                    charSequence781 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, charSequence781);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F781': "+ unionIndex781));
+            }
+        }
+        int unionIndex782 = (decoder.readIndex());
+        if (unionIndex782 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, null);
+        } else {
+            if (unionIndex782 == 1) {
+                Utf8 charSequence782;
+                Object oldString782 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(782);
+                if (oldString782 instanceof Utf8) {
+                    charSequence782 = (decoder).readString(((Utf8) oldString782));
+                } else {
+                    charSequence782 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, charSequence782);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F782': "+ unionIndex782));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex783 = (decoder.readIndex());
+        if (unionIndex783 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, null);
+        } else {
+            if (unionIndex783 == 1) {
+                Utf8 charSequence783;
+                Object oldString783 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(783);
+                if (oldString783 instanceof Utf8) {
+                    charSequence783 = (decoder).readString(((Utf8) oldString783));
+                } else {
+                    charSequence783 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, charSequence783);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F783': "+ unionIndex783));
+            }
+        }
+        int unionIndex784 = (decoder.readIndex());
+        if (unionIndex784 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, null);
+        } else {
+            if (unionIndex784 == 1) {
+                Utf8 charSequence784;
+                Object oldString784 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(784);
+                if (oldString784 instanceof Utf8) {
+                    charSequence784 = (decoder).readString(((Utf8) oldString784));
+                } else {
+                    charSequence784 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, charSequence784);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F784': "+ unionIndex784));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex785 = (decoder.readIndex());
+        if (unionIndex785 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, null);
+        } else {
+            if (unionIndex785 == 1) {
+                Utf8 charSequence785;
+                Object oldString785 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(785);
+                if (oldString785 instanceof Utf8) {
+                    charSequence785 = (decoder).readString(((Utf8) oldString785));
+                } else {
+                    charSequence785 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, charSequence785);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F785': "+ unionIndex785));
+            }
+        }
+        int unionIndex786 = (decoder.readIndex());
+        if (unionIndex786 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, null);
+        } else {
+            if (unionIndex786 == 1) {
+                Utf8 charSequence786;
+                Object oldString786 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(786);
+                if (oldString786 instanceof Utf8) {
+                    charSequence786 = (decoder).readString(((Utf8) oldString786));
+                } else {
+                    charSequence786 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, charSequence786);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F786': "+ unionIndex786));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex787 = (decoder.readIndex());
+        if (unionIndex787 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, null);
+        } else {
+            if (unionIndex787 == 1) {
+                Utf8 charSequence787;
+                Object oldString787 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(787);
+                if (oldString787 instanceof Utf8) {
+                    charSequence787 = (decoder).readString(((Utf8) oldString787));
+                } else {
+                    charSequence787 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, charSequence787);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F787': "+ unionIndex787));
+            }
+        }
+        int unionIndex788 = (decoder.readIndex());
+        if (unionIndex788 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, null);
+        } else {
+            if (unionIndex788 == 1) {
+                Utf8 charSequence788;
+                Object oldString788 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(788);
+                if (oldString788 instanceof Utf8) {
+                    charSequence788 = (decoder).readString(((Utf8) oldString788));
+                } else {
+                    charSequence788 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, charSequence788);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F788': "+ unionIndex788));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex789 = (decoder.readIndex());
+        if (unionIndex789 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, null);
+        } else {
+            if (unionIndex789 == 1) {
+                Utf8 charSequence789;
+                Object oldString789 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(789);
+                if (oldString789 instanceof Utf8) {
+                    charSequence789 = (decoder).readString(((Utf8) oldString789));
+                } else {
+                    charSequence789 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, charSequence789);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F789': "+ unionIndex789));
+            }
+        }
+        int unionIndex790 = (decoder.readIndex());
+        if (unionIndex790 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, null);
+        } else {
+            if (unionIndex790 == 1) {
+                Utf8 charSequence790;
+                Object oldString790 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(790);
+                if (oldString790 instanceof Utf8) {
+                    charSequence790 = (decoder).readString(((Utf8) oldString790));
+                } else {
+                    charSequence790 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, charSequence790);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F790': "+ unionIndex790));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex791 = (decoder.readIndex());
+        if (unionIndex791 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, null);
+        } else {
+            if (unionIndex791 == 1) {
+                Utf8 charSequence791;
+                Object oldString791 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(791);
+                if (oldString791 instanceof Utf8) {
+                    charSequence791 = (decoder).readString(((Utf8) oldString791));
+                } else {
+                    charSequence791 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, charSequence791);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F791': "+ unionIndex791));
+            }
+        }
+        int unionIndex792 = (decoder.readIndex());
+        if (unionIndex792 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, null);
+        } else {
+            if (unionIndex792 == 1) {
+                Utf8 charSequence792;
+                Object oldString792 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(792);
+                if (oldString792 instanceof Utf8) {
+                    charSequence792 = (decoder).readString(((Utf8) oldString792));
+                } else {
+                    charSequence792 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, charSequence792);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F792': "+ unionIndex792));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex793 = (decoder.readIndex());
+        if (unionIndex793 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, null);
+        } else {
+            if (unionIndex793 == 1) {
+                Utf8 charSequence793;
+                Object oldString793 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(793);
+                if (oldString793 instanceof Utf8) {
+                    charSequence793 = (decoder).readString(((Utf8) oldString793));
+                } else {
+                    charSequence793 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, charSequence793);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F793': "+ unionIndex793));
+            }
+        }
+        int unionIndex794 = (decoder.readIndex());
+        if (unionIndex794 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, null);
+        } else {
+            if (unionIndex794 == 1) {
+                Utf8 charSequence794;
+                Object oldString794 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(794);
+                if (oldString794 instanceof Utf8) {
+                    charSequence794 = (decoder).readString(((Utf8) oldString794));
+                } else {
+                    charSequence794 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, charSequence794);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F794': "+ unionIndex794));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex795 = (decoder.readIndex());
+        if (unionIndex795 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, null);
+        } else {
+            if (unionIndex795 == 1) {
+                Utf8 charSequence795;
+                Object oldString795 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(795);
+                if (oldString795 instanceof Utf8) {
+                    charSequence795 = (decoder).readString(((Utf8) oldString795));
+                } else {
+                    charSequence795 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, charSequence795);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F795': "+ unionIndex795));
+            }
+        }
+        int unionIndex796 = (decoder.readIndex());
+        if (unionIndex796 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, null);
+        } else {
+            if (unionIndex796 == 1) {
+                Utf8 charSequence796;
+                Object oldString796 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(796);
+                if (oldString796 instanceof Utf8) {
+                    charSequence796 = (decoder).readString(((Utf8) oldString796));
+                } else {
+                    charSequence796 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, charSequence796);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F796': "+ unionIndex796));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex797 = (decoder.readIndex());
+        if (unionIndex797 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, null);
+        } else {
+            if (unionIndex797 == 1) {
+                Utf8 charSequence797;
+                Object oldString797 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(797);
+                if (oldString797 instanceof Utf8) {
+                    charSequence797 = (decoder).readString(((Utf8) oldString797));
+                } else {
+                    charSequence797 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, charSequence797);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F797': "+ unionIndex797));
+            }
+        }
+        int unionIndex798 = (decoder.readIndex());
+        if (unionIndex798 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, null);
+        } else {
+            if (unionIndex798 == 1) {
+                Utf8 charSequence798;
+                Object oldString798 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(798);
+                if (oldString798 instanceof Utf8) {
+                    charSequence798 = (decoder).readString(((Utf8) oldString798));
+                } else {
+                    charSequence798 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, charSequence798);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F798': "+ unionIndex798));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex799 = (decoder.readIndex());
+        if (unionIndex799 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, null);
+        } else {
+            if (unionIndex799 == 1) {
+                Utf8 charSequence799;
+                Object oldString799 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(799);
+                if (oldString799 instanceof Utf8) {
+                    charSequence799 = (decoder).readString(((Utf8) oldString799));
+                } else {
+                    charSequence799 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, charSequence799);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F799': "+ unionIndex799));
+            }
+        }
+        int unionIndex800 = (decoder.readIndex());
+        if (unionIndex800 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, null);
+        } else {
+            if (unionIndex800 == 1) {
+                Utf8 charSequence800;
+                Object oldString800 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(800);
+                if (oldString800 instanceof Utf8) {
+                    charSequence800 = (decoder).readString(((Utf8) oldString800));
+                } else {
+                    charSequence800 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, charSequence800);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F800': "+ unionIndex800));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex801 = (decoder.readIndex());
+        if (unionIndex801 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, null);
+        } else {
+            if (unionIndex801 == 1) {
+                Utf8 charSequence801;
+                Object oldString801 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(801);
+                if (oldString801 instanceof Utf8) {
+                    charSequence801 = (decoder).readString(((Utf8) oldString801));
+                } else {
+                    charSequence801 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, charSequence801);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F801': "+ unionIndex801));
+            }
+        }
+        int unionIndex802 = (decoder.readIndex());
+        if (unionIndex802 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, null);
+        } else {
+            if (unionIndex802 == 1) {
+                Utf8 charSequence802;
+                Object oldString802 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(802);
+                if (oldString802 instanceof Utf8) {
+                    charSequence802 = (decoder).readString(((Utf8) oldString802));
+                } else {
+                    charSequence802 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, charSequence802);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F802': "+ unionIndex802));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex803 = (decoder.readIndex());
+        if (unionIndex803 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, null);
+        } else {
+            if (unionIndex803 == 1) {
+                Utf8 charSequence803;
+                Object oldString803 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(803);
+                if (oldString803 instanceof Utf8) {
+                    charSequence803 = (decoder).readString(((Utf8) oldString803));
+                } else {
+                    charSequence803 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, charSequence803);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F803': "+ unionIndex803));
+            }
+        }
+        int unionIndex804 = (decoder.readIndex());
+        if (unionIndex804 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, null);
+        } else {
+            if (unionIndex804 == 1) {
+                Utf8 charSequence804;
+                Object oldString804 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(804);
+                if (oldString804 instanceof Utf8) {
+                    charSequence804 = (decoder).readString(((Utf8) oldString804));
+                } else {
+                    charSequence804 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, charSequence804);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F804': "+ unionIndex804));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex805 = (decoder.readIndex());
+        if (unionIndex805 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, null);
+        } else {
+            if (unionIndex805 == 1) {
+                Utf8 charSequence805;
+                Object oldString805 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(805);
+                if (oldString805 instanceof Utf8) {
+                    charSequence805 = (decoder).readString(((Utf8) oldString805));
+                } else {
+                    charSequence805 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, charSequence805);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F805': "+ unionIndex805));
+            }
+        }
+        int unionIndex806 = (decoder.readIndex());
+        if (unionIndex806 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, null);
+        } else {
+            if (unionIndex806 == 1) {
+                Utf8 charSequence806;
+                Object oldString806 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(806);
+                if (oldString806 instanceof Utf8) {
+                    charSequence806 = (decoder).readString(((Utf8) oldString806));
+                } else {
+                    charSequence806 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, charSequence806);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F806': "+ unionIndex806));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex807 = (decoder.readIndex());
+        if (unionIndex807 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, null);
+        } else {
+            if (unionIndex807 == 1) {
+                Utf8 charSequence807;
+                Object oldString807 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(807);
+                if (oldString807 instanceof Utf8) {
+                    charSequence807 = (decoder).readString(((Utf8) oldString807));
+                } else {
+                    charSequence807 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, charSequence807);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F807': "+ unionIndex807));
+            }
+        }
+        int unionIndex808 = (decoder.readIndex());
+        if (unionIndex808 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, null);
+        } else {
+            if (unionIndex808 == 1) {
+                Utf8 charSequence808;
+                Object oldString808 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(808);
+                if (oldString808 instanceof Utf8) {
+                    charSequence808 = (decoder).readString(((Utf8) oldString808));
+                } else {
+                    charSequence808 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, charSequence808);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F808': "+ unionIndex808));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex809 = (decoder.readIndex());
+        if (unionIndex809 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, null);
+        } else {
+            if (unionIndex809 == 1) {
+                Utf8 charSequence809;
+                Object oldString809 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(809);
+                if (oldString809 instanceof Utf8) {
+                    charSequence809 = (decoder).readString(((Utf8) oldString809));
+                } else {
+                    charSequence809 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, charSequence809);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F809': "+ unionIndex809));
+            }
+        }
+        int unionIndex810 = (decoder.readIndex());
+        if (unionIndex810 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, null);
+        } else {
+            if (unionIndex810 == 1) {
+                Utf8 charSequence810;
+                Object oldString810 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(810);
+                if (oldString810 instanceof Utf8) {
+                    charSequence810 = (decoder).readString(((Utf8) oldString810));
+                } else {
+                    charSequence810 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, charSequence810);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F810': "+ unionIndex810));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex811 = (decoder.readIndex());
+        if (unionIndex811 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, null);
+        } else {
+            if (unionIndex811 == 1) {
+                Utf8 charSequence811;
+                Object oldString811 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(811);
+                if (oldString811 instanceof Utf8) {
+                    charSequence811 = (decoder).readString(((Utf8) oldString811));
+                } else {
+                    charSequence811 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, charSequence811);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F811': "+ unionIndex811));
+            }
+        }
+        int unionIndex812 = (decoder.readIndex());
+        if (unionIndex812 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, null);
+        } else {
+            if (unionIndex812 == 1) {
+                Utf8 charSequence812;
+                Object oldString812 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(812);
+                if (oldString812 instanceof Utf8) {
+                    charSequence812 = (decoder).readString(((Utf8) oldString812));
+                } else {
+                    charSequence812 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, charSequence812);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F812': "+ unionIndex812));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex813 = (decoder.readIndex());
+        if (unionIndex813 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, null);
+        } else {
+            if (unionIndex813 == 1) {
+                Utf8 charSequence813;
+                Object oldString813 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(813);
+                if (oldString813 instanceof Utf8) {
+                    charSequence813 = (decoder).readString(((Utf8) oldString813));
+                } else {
+                    charSequence813 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, charSequence813);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F813': "+ unionIndex813));
+            }
+        }
+        int unionIndex814 = (decoder.readIndex());
+        if (unionIndex814 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, null);
+        } else {
+            if (unionIndex814 == 1) {
+                Utf8 charSequence814;
+                Object oldString814 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(814);
+                if (oldString814 instanceof Utf8) {
+                    charSequence814 = (decoder).readString(((Utf8) oldString814));
+                } else {
+                    charSequence814 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, charSequence814);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F814': "+ unionIndex814));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex815 = (decoder.readIndex());
+        if (unionIndex815 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, null);
+        } else {
+            if (unionIndex815 == 1) {
+                Utf8 charSequence815;
+                Object oldString815 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(815);
+                if (oldString815 instanceof Utf8) {
+                    charSequence815 = (decoder).readString(((Utf8) oldString815));
+                } else {
+                    charSequence815 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, charSequence815);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F815': "+ unionIndex815));
+            }
+        }
+        int unionIndex816 = (decoder.readIndex());
+        if (unionIndex816 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, null);
+        } else {
+            if (unionIndex816 == 1) {
+                Utf8 charSequence816;
+                Object oldString816 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(816);
+                if (oldString816 instanceof Utf8) {
+                    charSequence816 = (decoder).readString(((Utf8) oldString816));
+                } else {
+                    charSequence816 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, charSequence816);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F816': "+ unionIndex816));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex817 = (decoder.readIndex());
+        if (unionIndex817 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, null);
+        } else {
+            if (unionIndex817 == 1) {
+                Utf8 charSequence817;
+                Object oldString817 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(817);
+                if (oldString817 instanceof Utf8) {
+                    charSequence817 = (decoder).readString(((Utf8) oldString817));
+                } else {
+                    charSequence817 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, charSequence817);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F817': "+ unionIndex817));
+            }
+        }
+        int unionIndex818 = (decoder.readIndex());
+        if (unionIndex818 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, null);
+        } else {
+            if (unionIndex818 == 1) {
+                Utf8 charSequence818;
+                Object oldString818 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(818);
+                if (oldString818 instanceof Utf8) {
+                    charSequence818 = (decoder).readString(((Utf8) oldString818));
+                } else {
+                    charSequence818 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, charSequence818);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F818': "+ unionIndex818));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex819 = (decoder.readIndex());
+        if (unionIndex819 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, null);
+        } else {
+            if (unionIndex819 == 1) {
+                Utf8 charSequence819;
+                Object oldString819 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(819);
+                if (oldString819 instanceof Utf8) {
+                    charSequence819 = (decoder).readString(((Utf8) oldString819));
+                } else {
+                    charSequence819 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, charSequence819);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F819': "+ unionIndex819));
+            }
+        }
+        int unionIndex820 = (decoder.readIndex());
+        if (unionIndex820 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, null);
+        } else {
+            if (unionIndex820 == 1) {
+                Utf8 charSequence820;
+                Object oldString820 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(820);
+                if (oldString820 instanceof Utf8) {
+                    charSequence820 = (decoder).readString(((Utf8) oldString820));
+                } else {
+                    charSequence820 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, charSequence820);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F820': "+ unionIndex820));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex821 = (decoder.readIndex());
+        if (unionIndex821 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, null);
+        } else {
+            if (unionIndex821 == 1) {
+                Utf8 charSequence821;
+                Object oldString821 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(821);
+                if (oldString821 instanceof Utf8) {
+                    charSequence821 = (decoder).readString(((Utf8) oldString821));
+                } else {
+                    charSequence821 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, charSequence821);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F821': "+ unionIndex821));
+            }
+        }
+        int unionIndex822 = (decoder.readIndex());
+        if (unionIndex822 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, null);
+        } else {
+            if (unionIndex822 == 1) {
+                Utf8 charSequence822;
+                Object oldString822 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(822);
+                if (oldString822 instanceof Utf8) {
+                    charSequence822 = (decoder).readString(((Utf8) oldString822));
+                } else {
+                    charSequence822 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, charSequence822);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F822': "+ unionIndex822));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex823 = (decoder.readIndex());
+        if (unionIndex823 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, null);
+        } else {
+            if (unionIndex823 == 1) {
+                Utf8 charSequence823;
+                Object oldString823 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(823);
+                if (oldString823 instanceof Utf8) {
+                    charSequence823 = (decoder).readString(((Utf8) oldString823));
+                } else {
+                    charSequence823 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, charSequence823);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F823': "+ unionIndex823));
+            }
+        }
+        int unionIndex824 = (decoder.readIndex());
+        if (unionIndex824 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, null);
+        } else {
+            if (unionIndex824 == 1) {
+                Utf8 charSequence824;
+                Object oldString824 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(824);
+                if (oldString824 instanceof Utf8) {
+                    charSequence824 = (decoder).readString(((Utf8) oldString824));
+                } else {
+                    charSequence824 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, charSequence824);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F824': "+ unionIndex824));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex825 = (decoder.readIndex());
+        if (unionIndex825 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, null);
+        } else {
+            if (unionIndex825 == 1) {
+                Utf8 charSequence825;
+                Object oldString825 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(825);
+                if (oldString825 instanceof Utf8) {
+                    charSequence825 = (decoder).readString(((Utf8) oldString825));
+                } else {
+                    charSequence825 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, charSequence825);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F825': "+ unionIndex825));
+            }
+        }
+        int unionIndex826 = (decoder.readIndex());
+        if (unionIndex826 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, null);
+        } else {
+            if (unionIndex826 == 1) {
+                Utf8 charSequence826;
+                Object oldString826 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(826);
+                if (oldString826 instanceof Utf8) {
+                    charSequence826 = (decoder).readString(((Utf8) oldString826));
+                } else {
+                    charSequence826 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, charSequence826);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F826': "+ unionIndex826));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex827 = (decoder.readIndex());
+        if (unionIndex827 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, null);
+        } else {
+            if (unionIndex827 == 1) {
+                Utf8 charSequence827;
+                Object oldString827 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(827);
+                if (oldString827 instanceof Utf8) {
+                    charSequence827 = (decoder).readString(((Utf8) oldString827));
+                } else {
+                    charSequence827 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, charSequence827);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F827': "+ unionIndex827));
+            }
+        }
+        int unionIndex828 = (decoder.readIndex());
+        if (unionIndex828 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, null);
+        } else {
+            if (unionIndex828 == 1) {
+                Utf8 charSequence828;
+                Object oldString828 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(828);
+                if (oldString828 instanceof Utf8) {
+                    charSequence828 = (decoder).readString(((Utf8) oldString828));
+                } else {
+                    charSequence828 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, charSequence828);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F828': "+ unionIndex828));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex829 = (decoder.readIndex());
+        if (unionIndex829 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, null);
+        } else {
+            if (unionIndex829 == 1) {
+                Utf8 charSequence829;
+                Object oldString829 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(829);
+                if (oldString829 instanceof Utf8) {
+                    charSequence829 = (decoder).readString(((Utf8) oldString829));
+                } else {
+                    charSequence829 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, charSequence829);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F829': "+ unionIndex829));
+            }
+        }
+        int unionIndex830 = (decoder.readIndex());
+        if (unionIndex830 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, null);
+        } else {
+            if (unionIndex830 == 1) {
+                Utf8 charSequence830;
+                Object oldString830 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(830);
+                if (oldString830 instanceof Utf8) {
+                    charSequence830 = (decoder).readString(((Utf8) oldString830));
+                } else {
+                    charSequence830 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, charSequence830);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F830': "+ unionIndex830));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex831 = (decoder.readIndex());
+        if (unionIndex831 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, null);
+        } else {
+            if (unionIndex831 == 1) {
+                Utf8 charSequence831;
+                Object oldString831 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(831);
+                if (oldString831 instanceof Utf8) {
+                    charSequence831 = (decoder).readString(((Utf8) oldString831));
+                } else {
+                    charSequence831 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, charSequence831);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F831': "+ unionIndex831));
+            }
+        }
+        int unionIndex832 = (decoder.readIndex());
+        if (unionIndex832 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, null);
+        } else {
+            if (unionIndex832 == 1) {
+                Utf8 charSequence832;
+                Object oldString832 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(832);
+                if (oldString832 instanceof Utf8) {
+                    charSequence832 = (decoder).readString(((Utf8) oldString832));
+                } else {
+                    charSequence832 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, charSequence832);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F832': "+ unionIndex832));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex833 = (decoder.readIndex());
+        if (unionIndex833 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, null);
+        } else {
+            if (unionIndex833 == 1) {
+                Utf8 charSequence833;
+                Object oldString833 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(833);
+                if (oldString833 instanceof Utf8) {
+                    charSequence833 = (decoder).readString(((Utf8) oldString833));
+                } else {
+                    charSequence833 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, charSequence833);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F833': "+ unionIndex833));
+            }
+        }
+        int unionIndex834 = (decoder.readIndex());
+        if (unionIndex834 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, null);
+        } else {
+            if (unionIndex834 == 1) {
+                Utf8 charSequence834;
+                Object oldString834 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(834);
+                if (oldString834 instanceof Utf8) {
+                    charSequence834 = (decoder).readString(((Utf8) oldString834));
+                } else {
+                    charSequence834 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, charSequence834);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F834': "+ unionIndex834));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex835 = (decoder.readIndex());
+        if (unionIndex835 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, null);
+        } else {
+            if (unionIndex835 == 1) {
+                Utf8 charSequence835;
+                Object oldString835 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(835);
+                if (oldString835 instanceof Utf8) {
+                    charSequence835 = (decoder).readString(((Utf8) oldString835));
+                } else {
+                    charSequence835 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, charSequence835);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F835': "+ unionIndex835));
+            }
+        }
+        int unionIndex836 = (decoder.readIndex());
+        if (unionIndex836 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, null);
+        } else {
+            if (unionIndex836 == 1) {
+                Utf8 charSequence836;
+                Object oldString836 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(836);
+                if (oldString836 instanceof Utf8) {
+                    charSequence836 = (decoder).readString(((Utf8) oldString836));
+                } else {
+                    charSequence836 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, charSequence836);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F836': "+ unionIndex836));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex837 = (decoder.readIndex());
+        if (unionIndex837 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, null);
+        } else {
+            if (unionIndex837 == 1) {
+                Utf8 charSequence837;
+                Object oldString837 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(837);
+                if (oldString837 instanceof Utf8) {
+                    charSequence837 = (decoder).readString(((Utf8) oldString837));
+                } else {
+                    charSequence837 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, charSequence837);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F837': "+ unionIndex837));
+            }
+        }
+        int unionIndex838 = (decoder.readIndex());
+        if (unionIndex838 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, null);
+        } else {
+            if (unionIndex838 == 1) {
+                Utf8 charSequence838;
+                Object oldString838 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(838);
+                if (oldString838 instanceof Utf8) {
+                    charSequence838 = (decoder).readString(((Utf8) oldString838));
+                } else {
+                    charSequence838 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, charSequence838);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F838': "+ unionIndex838));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex839 = (decoder.readIndex());
+        if (unionIndex839 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, null);
+        } else {
+            if (unionIndex839 == 1) {
+                Utf8 charSequence839;
+                Object oldString839 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(839);
+                if (oldString839 instanceof Utf8) {
+                    charSequence839 = (decoder).readString(((Utf8) oldString839));
+                } else {
+                    charSequence839 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, charSequence839);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F839': "+ unionIndex839));
+            }
+        }
+        int unionIndex840 = (decoder.readIndex());
+        if (unionIndex840 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, null);
+        } else {
+            if (unionIndex840 == 1) {
+                Utf8 charSequence840;
+                Object oldString840 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(840);
+                if (oldString840 instanceof Utf8) {
+                    charSequence840 = (decoder).readString(((Utf8) oldString840));
+                } else {
+                    charSequence840 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, charSequence840);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F840': "+ unionIndex840));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex841 = (decoder.readIndex());
+        if (unionIndex841 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, null);
+        } else {
+            if (unionIndex841 == 1) {
+                Utf8 charSequence841;
+                Object oldString841 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(841);
+                if (oldString841 instanceof Utf8) {
+                    charSequence841 = (decoder).readString(((Utf8) oldString841));
+                } else {
+                    charSequence841 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, charSequence841);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F841': "+ unionIndex841));
+            }
+        }
+        int unionIndex842 = (decoder.readIndex());
+        if (unionIndex842 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, null);
+        } else {
+            if (unionIndex842 == 1) {
+                Utf8 charSequence842;
+                Object oldString842 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(842);
+                if (oldString842 instanceof Utf8) {
+                    charSequence842 = (decoder).readString(((Utf8) oldString842));
+                } else {
+                    charSequence842 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, charSequence842);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F842': "+ unionIndex842));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex843 = (decoder.readIndex());
+        if (unionIndex843 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, null);
+        } else {
+            if (unionIndex843 == 1) {
+                Utf8 charSequence843;
+                Object oldString843 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(843);
+                if (oldString843 instanceof Utf8) {
+                    charSequence843 = (decoder).readString(((Utf8) oldString843));
+                } else {
+                    charSequence843 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, charSequence843);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F843': "+ unionIndex843));
+            }
+        }
+        int unionIndex844 = (decoder.readIndex());
+        if (unionIndex844 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, null);
+        } else {
+            if (unionIndex844 == 1) {
+                Utf8 charSequence844;
+                Object oldString844 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(844);
+                if (oldString844 instanceof Utf8) {
+                    charSequence844 = (decoder).readString(((Utf8) oldString844));
+                } else {
+                    charSequence844 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, charSequence844);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F844': "+ unionIndex844));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex845 = (decoder.readIndex());
+        if (unionIndex845 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, null);
+        } else {
+            if (unionIndex845 == 1) {
+                Utf8 charSequence845;
+                Object oldString845 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(845);
+                if (oldString845 instanceof Utf8) {
+                    charSequence845 = (decoder).readString(((Utf8) oldString845));
+                } else {
+                    charSequence845 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, charSequence845);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F845': "+ unionIndex845));
+            }
+        }
+        int unionIndex846 = (decoder.readIndex());
+        if (unionIndex846 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, null);
+        } else {
+            if (unionIndex846 == 1) {
+                Utf8 charSequence846;
+                Object oldString846 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(846);
+                if (oldString846 instanceof Utf8) {
+                    charSequence846 = (decoder).readString(((Utf8) oldString846));
+                } else {
+                    charSequence846 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, charSequence846);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F846': "+ unionIndex846));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex847 = (decoder.readIndex());
+        if (unionIndex847 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, null);
+        } else {
+            if (unionIndex847 == 1) {
+                Utf8 charSequence847;
+                Object oldString847 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(847);
+                if (oldString847 instanceof Utf8) {
+                    charSequence847 = (decoder).readString(((Utf8) oldString847));
+                } else {
+                    charSequence847 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, charSequence847);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F847': "+ unionIndex847));
+            }
+        }
+        int unionIndex848 = (decoder.readIndex());
+        if (unionIndex848 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, null);
+        } else {
+            if (unionIndex848 == 1) {
+                Utf8 charSequence848;
+                Object oldString848 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(848);
+                if (oldString848 instanceof Utf8) {
+                    charSequence848 = (decoder).readString(((Utf8) oldString848));
+                } else {
+                    charSequence848 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, charSequence848);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F848': "+ unionIndex848));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex849 = (decoder.readIndex());
+        if (unionIndex849 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, null);
+        } else {
+            if (unionIndex849 == 1) {
+                Utf8 charSequence849;
+                Object oldString849 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(849);
+                if (oldString849 instanceof Utf8) {
+                    charSequence849 = (decoder).readString(((Utf8) oldString849));
+                } else {
+                    charSequence849 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, charSequence849);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F849': "+ unionIndex849));
+            }
+        }
+        int unionIndex850 = (decoder.readIndex());
+        if (unionIndex850 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, null);
+        } else {
+            if (unionIndex850 == 1) {
+                Utf8 charSequence850;
+                Object oldString850 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(850);
+                if (oldString850 instanceof Utf8) {
+                    charSequence850 = (decoder).readString(((Utf8) oldString850));
+                } else {
+                    charSequence850 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, charSequence850);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F850': "+ unionIndex850));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex851 = (decoder.readIndex());
+        if (unionIndex851 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, null);
+        } else {
+            if (unionIndex851 == 1) {
+                Utf8 charSequence851;
+                Object oldString851 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(851);
+                if (oldString851 instanceof Utf8) {
+                    charSequence851 = (decoder).readString(((Utf8) oldString851));
+                } else {
+                    charSequence851 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, charSequence851);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F851': "+ unionIndex851));
+            }
+        }
+        int unionIndex852 = (decoder.readIndex());
+        if (unionIndex852 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, null);
+        } else {
+            if (unionIndex852 == 1) {
+                Utf8 charSequence852;
+                Object oldString852 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(852);
+                if (oldString852 instanceof Utf8) {
+                    charSequence852 = (decoder).readString(((Utf8) oldString852));
+                } else {
+                    charSequence852 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, charSequence852);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F852': "+ unionIndex852));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex853 = (decoder.readIndex());
+        if (unionIndex853 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, null);
+        } else {
+            if (unionIndex853 == 1) {
+                Utf8 charSequence853;
+                Object oldString853 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(853);
+                if (oldString853 instanceof Utf8) {
+                    charSequence853 = (decoder).readString(((Utf8) oldString853));
+                } else {
+                    charSequence853 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, charSequence853);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F853': "+ unionIndex853));
+            }
+        }
+        int unionIndex854 = (decoder.readIndex());
+        if (unionIndex854 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, null);
+        } else {
+            if (unionIndex854 == 1) {
+                Utf8 charSequence854;
+                Object oldString854 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(854);
+                if (oldString854 instanceof Utf8) {
+                    charSequence854 = (decoder).readString(((Utf8) oldString854));
+                } else {
+                    charSequence854 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, charSequence854);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F854': "+ unionIndex854));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex855 = (decoder.readIndex());
+        if (unionIndex855 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, null);
+        } else {
+            if (unionIndex855 == 1) {
+                Utf8 charSequence855;
+                Object oldString855 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(855);
+                if (oldString855 instanceof Utf8) {
+                    charSequence855 = (decoder).readString(((Utf8) oldString855));
+                } else {
+                    charSequence855 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, charSequence855);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F855': "+ unionIndex855));
+            }
+        }
+        int unionIndex856 = (decoder.readIndex());
+        if (unionIndex856 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, null);
+        } else {
+            if (unionIndex856 == 1) {
+                Utf8 charSequence856;
+                Object oldString856 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(856);
+                if (oldString856 instanceof Utf8) {
+                    charSequence856 = (decoder).readString(((Utf8) oldString856));
+                } else {
+                    charSequence856 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, charSequence856);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F856': "+ unionIndex856));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex857 = (decoder.readIndex());
+        if (unionIndex857 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, null);
+        } else {
+            if (unionIndex857 == 1) {
+                Utf8 charSequence857;
+                Object oldString857 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(857);
+                if (oldString857 instanceof Utf8) {
+                    charSequence857 = (decoder).readString(((Utf8) oldString857));
+                } else {
+                    charSequence857 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, charSequence857);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F857': "+ unionIndex857));
+            }
+        }
+        int unionIndex858 = (decoder.readIndex());
+        if (unionIndex858 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, null);
+        } else {
+            if (unionIndex858 == 1) {
+                Utf8 charSequence858;
+                Object oldString858 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(858);
+                if (oldString858 instanceof Utf8) {
+                    charSequence858 = (decoder).readString(((Utf8) oldString858));
+                } else {
+                    charSequence858 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, charSequence858);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F858': "+ unionIndex858));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex859 = (decoder.readIndex());
+        if (unionIndex859 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, null);
+        } else {
+            if (unionIndex859 == 1) {
+                Utf8 charSequence859;
+                Object oldString859 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(859);
+                if (oldString859 instanceof Utf8) {
+                    charSequence859 = (decoder).readString(((Utf8) oldString859));
+                } else {
+                    charSequence859 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, charSequence859);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F859': "+ unionIndex859));
+            }
+        }
+        int unionIndex860 = (decoder.readIndex());
+        if (unionIndex860 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, null);
+        } else {
+            if (unionIndex860 == 1) {
+                Utf8 charSequence860;
+                Object oldString860 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(860);
+                if (oldString860 instanceof Utf8) {
+                    charSequence860 = (decoder).readString(((Utf8) oldString860));
+                } else {
+                    charSequence860 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, charSequence860);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F860': "+ unionIndex860));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex861 = (decoder.readIndex());
+        if (unionIndex861 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, null);
+        } else {
+            if (unionIndex861 == 1) {
+                Utf8 charSequence861;
+                Object oldString861 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(861);
+                if (oldString861 instanceof Utf8) {
+                    charSequence861 = (decoder).readString(((Utf8) oldString861));
+                } else {
+                    charSequence861 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, charSequence861);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F861': "+ unionIndex861));
+            }
+        }
+        int unionIndex862 = (decoder.readIndex());
+        if (unionIndex862 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, null);
+        } else {
+            if (unionIndex862 == 1) {
+                Utf8 charSequence862;
+                Object oldString862 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(862);
+                if (oldString862 instanceof Utf8) {
+                    charSequence862 = (decoder).readString(((Utf8) oldString862));
+                } else {
+                    charSequence862 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, charSequence862);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F862': "+ unionIndex862));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex863 = (decoder.readIndex());
+        if (unionIndex863 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, null);
+        } else {
+            if (unionIndex863 == 1) {
+                Utf8 charSequence863;
+                Object oldString863 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(863);
+                if (oldString863 instanceof Utf8) {
+                    charSequence863 = (decoder).readString(((Utf8) oldString863));
+                } else {
+                    charSequence863 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, charSequence863);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F863': "+ unionIndex863));
+            }
+        }
+        int unionIndex864 = (decoder.readIndex());
+        if (unionIndex864 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, null);
+        } else {
+            if (unionIndex864 == 1) {
+                Utf8 charSequence864;
+                Object oldString864 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(864);
+                if (oldString864 instanceof Utf8) {
+                    charSequence864 = (decoder).readString(((Utf8) oldString864));
+                } else {
+                    charSequence864 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, charSequence864);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F864': "+ unionIndex864));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex865 = (decoder.readIndex());
+        if (unionIndex865 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, null);
+        } else {
+            if (unionIndex865 == 1) {
+                Utf8 charSequence865;
+                Object oldString865 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(865);
+                if (oldString865 instanceof Utf8) {
+                    charSequence865 = (decoder).readString(((Utf8) oldString865));
+                } else {
+                    charSequence865 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, charSequence865);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F865': "+ unionIndex865));
+            }
+        }
+        int unionIndex866 = (decoder.readIndex());
+        if (unionIndex866 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, null);
+        } else {
+            if (unionIndex866 == 1) {
+                Utf8 charSequence866;
+                Object oldString866 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(866);
+                if (oldString866 instanceof Utf8) {
+                    charSequence866 = (decoder).readString(((Utf8) oldString866));
+                } else {
+                    charSequence866 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, charSequence866);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F866': "+ unionIndex866));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex867 = (decoder.readIndex());
+        if (unionIndex867 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, null);
+        } else {
+            if (unionIndex867 == 1) {
+                Utf8 charSequence867;
+                Object oldString867 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(867);
+                if (oldString867 instanceof Utf8) {
+                    charSequence867 = (decoder).readString(((Utf8) oldString867));
+                } else {
+                    charSequence867 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, charSequence867);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F867': "+ unionIndex867));
+            }
+        }
+        int unionIndex868 = (decoder.readIndex());
+        if (unionIndex868 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, null);
+        } else {
+            if (unionIndex868 == 1) {
+                Utf8 charSequence868;
+                Object oldString868 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(868);
+                if (oldString868 instanceof Utf8) {
+                    charSequence868 = (decoder).readString(((Utf8) oldString868));
+                } else {
+                    charSequence868 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, charSequence868);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F868': "+ unionIndex868));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex869 = (decoder.readIndex());
+        if (unionIndex869 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, null);
+        } else {
+            if (unionIndex869 == 1) {
+                Utf8 charSequence869;
+                Object oldString869 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(869);
+                if (oldString869 instanceof Utf8) {
+                    charSequence869 = (decoder).readString(((Utf8) oldString869));
+                } else {
+                    charSequence869 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, charSequence869);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F869': "+ unionIndex869));
+            }
+        }
+        int unionIndex870 = (decoder.readIndex());
+        if (unionIndex870 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, null);
+        } else {
+            if (unionIndex870 == 1) {
+                Utf8 charSequence870;
+                Object oldString870 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(870);
+                if (oldString870 instanceof Utf8) {
+                    charSequence870 = (decoder).readString(((Utf8) oldString870));
+                } else {
+                    charSequence870 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, charSequence870);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F870': "+ unionIndex870));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex871 = (decoder.readIndex());
+        if (unionIndex871 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, null);
+        } else {
+            if (unionIndex871 == 1) {
+                Utf8 charSequence871;
+                Object oldString871 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(871);
+                if (oldString871 instanceof Utf8) {
+                    charSequence871 = (decoder).readString(((Utf8) oldString871));
+                } else {
+                    charSequence871 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, charSequence871);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F871': "+ unionIndex871));
+            }
+        }
+        int unionIndex872 = (decoder.readIndex());
+        if (unionIndex872 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, null);
+        } else {
+            if (unionIndex872 == 1) {
+                Utf8 charSequence872;
+                Object oldString872 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(872);
+                if (oldString872 instanceof Utf8) {
+                    charSequence872 = (decoder).readString(((Utf8) oldString872));
+                } else {
+                    charSequence872 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, charSequence872);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F872': "+ unionIndex872));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex873 = (decoder.readIndex());
+        if (unionIndex873 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, null);
+        } else {
+            if (unionIndex873 == 1) {
+                Utf8 charSequence873;
+                Object oldString873 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(873);
+                if (oldString873 instanceof Utf8) {
+                    charSequence873 = (decoder).readString(((Utf8) oldString873));
+                } else {
+                    charSequence873 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, charSequence873);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F873': "+ unionIndex873));
+            }
+        }
+        int unionIndex874 = (decoder.readIndex());
+        if (unionIndex874 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, null);
+        } else {
+            if (unionIndex874 == 1) {
+                Utf8 charSequence874;
+                Object oldString874 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(874);
+                if (oldString874 instanceof Utf8) {
+                    charSequence874 = (decoder).readString(((Utf8) oldString874));
+                } else {
+                    charSequence874 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, charSequence874);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F874': "+ unionIndex874));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex875 = (decoder.readIndex());
+        if (unionIndex875 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, null);
+        } else {
+            if (unionIndex875 == 1) {
+                Utf8 charSequence875;
+                Object oldString875 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(875);
+                if (oldString875 instanceof Utf8) {
+                    charSequence875 = (decoder).readString(((Utf8) oldString875));
+                } else {
+                    charSequence875 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, charSequence875);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F875': "+ unionIndex875));
+            }
+        }
+        int unionIndex876 = (decoder.readIndex());
+        if (unionIndex876 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, null);
+        } else {
+            if (unionIndex876 == 1) {
+                Utf8 charSequence876;
+                Object oldString876 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(876);
+                if (oldString876 instanceof Utf8) {
+                    charSequence876 = (decoder).readString(((Utf8) oldString876));
+                } else {
+                    charSequence876 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, charSequence876);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F876': "+ unionIndex876));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex877 = (decoder.readIndex());
+        if (unionIndex877 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, null);
+        } else {
+            if (unionIndex877 == 1) {
+                Utf8 charSequence877;
+                Object oldString877 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(877);
+                if (oldString877 instanceof Utf8) {
+                    charSequence877 = (decoder).readString(((Utf8) oldString877));
+                } else {
+                    charSequence877 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, charSequence877);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F877': "+ unionIndex877));
+            }
+        }
+        int unionIndex878 = (decoder.readIndex());
+        if (unionIndex878 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, null);
+        } else {
+            if (unionIndex878 == 1) {
+                Utf8 charSequence878;
+                Object oldString878 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(878);
+                if (oldString878 instanceof Utf8) {
+                    charSequence878 = (decoder).readString(((Utf8) oldString878));
+                } else {
+                    charSequence878 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, charSequence878);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F878': "+ unionIndex878));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex879 = (decoder.readIndex());
+        if (unionIndex879 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, null);
+        } else {
+            if (unionIndex879 == 1) {
+                Utf8 charSequence879;
+                Object oldString879 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(879);
+                if (oldString879 instanceof Utf8) {
+                    charSequence879 = (decoder).readString(((Utf8) oldString879));
+                } else {
+                    charSequence879 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, charSequence879);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F879': "+ unionIndex879));
+            }
+        }
+        int unionIndex880 = (decoder.readIndex());
+        if (unionIndex880 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, null);
+        } else {
+            if (unionIndex880 == 1) {
+                Utf8 charSequence880;
+                Object oldString880 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(880);
+                if (oldString880 instanceof Utf8) {
+                    charSequence880 = (decoder).readString(((Utf8) oldString880));
+                } else {
+                    charSequence880 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, charSequence880);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F880': "+ unionIndex880));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex881 = (decoder.readIndex());
+        if (unionIndex881 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, null);
+        } else {
+            if (unionIndex881 == 1) {
+                Utf8 charSequence881;
+                Object oldString881 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(881);
+                if (oldString881 instanceof Utf8) {
+                    charSequence881 = (decoder).readString(((Utf8) oldString881));
+                } else {
+                    charSequence881 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, charSequence881);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F881': "+ unionIndex881));
+            }
+        }
+        int unionIndex882 = (decoder.readIndex());
+        if (unionIndex882 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, null);
+        } else {
+            if (unionIndex882 == 1) {
+                Utf8 charSequence882;
+                Object oldString882 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(882);
+                if (oldString882 instanceof Utf8) {
+                    charSequence882 = (decoder).readString(((Utf8) oldString882));
+                } else {
+                    charSequence882 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, charSequence882);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F882': "+ unionIndex882));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex883 = (decoder.readIndex());
+        if (unionIndex883 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, null);
+        } else {
+            if (unionIndex883 == 1) {
+                Utf8 charSequence883;
+                Object oldString883 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(883);
+                if (oldString883 instanceof Utf8) {
+                    charSequence883 = (decoder).readString(((Utf8) oldString883));
+                } else {
+                    charSequence883 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, charSequence883);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F883': "+ unionIndex883));
+            }
+        }
+        int unionIndex884 = (decoder.readIndex());
+        if (unionIndex884 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, null);
+        } else {
+            if (unionIndex884 == 1) {
+                Utf8 charSequence884;
+                Object oldString884 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(884);
+                if (oldString884 instanceof Utf8) {
+                    charSequence884 = (decoder).readString(((Utf8) oldString884));
+                } else {
+                    charSequence884 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, charSequence884);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F884': "+ unionIndex884));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex885 = (decoder.readIndex());
+        if (unionIndex885 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, null);
+        } else {
+            if (unionIndex885 == 1) {
+                Utf8 charSequence885;
+                Object oldString885 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(885);
+                if (oldString885 instanceof Utf8) {
+                    charSequence885 = (decoder).readString(((Utf8) oldString885));
+                } else {
+                    charSequence885 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, charSequence885);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F885': "+ unionIndex885));
+            }
+        }
+        int unionIndex886 = (decoder.readIndex());
+        if (unionIndex886 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, null);
+        } else {
+            if (unionIndex886 == 1) {
+                Utf8 charSequence886;
+                Object oldString886 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(886);
+                if (oldString886 instanceof Utf8) {
+                    charSequence886 = (decoder).readString(((Utf8) oldString886));
+                } else {
+                    charSequence886 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, charSequence886);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F886': "+ unionIndex886));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex887 = (decoder.readIndex());
+        if (unionIndex887 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, null);
+        } else {
+            if (unionIndex887 == 1) {
+                Utf8 charSequence887;
+                Object oldString887 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(887);
+                if (oldString887 instanceof Utf8) {
+                    charSequence887 = (decoder).readString(((Utf8) oldString887));
+                } else {
+                    charSequence887 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, charSequence887);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F887': "+ unionIndex887));
+            }
+        }
+        int unionIndex888 = (decoder.readIndex());
+        if (unionIndex888 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, null);
+        } else {
+            if (unionIndex888 == 1) {
+                Utf8 charSequence888;
+                Object oldString888 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(888);
+                if (oldString888 instanceof Utf8) {
+                    charSequence888 = (decoder).readString(((Utf8) oldString888));
+                } else {
+                    charSequence888 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, charSequence888);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F888': "+ unionIndex888));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex889 = (decoder.readIndex());
+        if (unionIndex889 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, null);
+        } else {
+            if (unionIndex889 == 1) {
+                Utf8 charSequence889;
+                Object oldString889 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(889);
+                if (oldString889 instanceof Utf8) {
+                    charSequence889 = (decoder).readString(((Utf8) oldString889));
+                } else {
+                    charSequence889 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, charSequence889);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F889': "+ unionIndex889));
+            }
+        }
+        int unionIndex890 = (decoder.readIndex());
+        if (unionIndex890 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, null);
+        } else {
+            if (unionIndex890 == 1) {
+                Utf8 charSequence890;
+                Object oldString890 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(890);
+                if (oldString890 instanceof Utf8) {
+                    charSequence890 = (decoder).readString(((Utf8) oldString890));
+                } else {
+                    charSequence890 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, charSequence890);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F890': "+ unionIndex890));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex891 = (decoder.readIndex());
+        if (unionIndex891 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, null);
+        } else {
+            if (unionIndex891 == 1) {
+                Utf8 charSequence891;
+                Object oldString891 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(891);
+                if (oldString891 instanceof Utf8) {
+                    charSequence891 = (decoder).readString(((Utf8) oldString891));
+                } else {
+                    charSequence891 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, charSequence891);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F891': "+ unionIndex891));
+            }
+        }
+        int unionIndex892 = (decoder.readIndex());
+        if (unionIndex892 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, null);
+        } else {
+            if (unionIndex892 == 1) {
+                Utf8 charSequence892;
+                Object oldString892 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(892);
+                if (oldString892 instanceof Utf8) {
+                    charSequence892 = (decoder).readString(((Utf8) oldString892));
+                } else {
+                    charSequence892 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, charSequence892);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F892': "+ unionIndex892));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex893 = (decoder.readIndex());
+        if (unionIndex893 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, null);
+        } else {
+            if (unionIndex893 == 1) {
+                Utf8 charSequence893;
+                Object oldString893 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(893);
+                if (oldString893 instanceof Utf8) {
+                    charSequence893 = (decoder).readString(((Utf8) oldString893));
+                } else {
+                    charSequence893 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, charSequence893);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F893': "+ unionIndex893));
+            }
+        }
+        int unionIndex894 = (decoder.readIndex());
+        if (unionIndex894 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, null);
+        } else {
+            if (unionIndex894 == 1) {
+                Utf8 charSequence894;
+                Object oldString894 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(894);
+                if (oldString894 instanceof Utf8) {
+                    charSequence894 = (decoder).readString(((Utf8) oldString894));
+                } else {
+                    charSequence894 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, charSequence894);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F894': "+ unionIndex894));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex895 = (decoder.readIndex());
+        if (unionIndex895 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, null);
+        } else {
+            if (unionIndex895 == 1) {
+                Utf8 charSequence895;
+                Object oldString895 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(895);
+                if (oldString895 instanceof Utf8) {
+                    charSequence895 = (decoder).readString(((Utf8) oldString895));
+                } else {
+                    charSequence895 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, charSequence895);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F895': "+ unionIndex895));
+            }
+        }
+        int unionIndex896 = (decoder.readIndex());
+        if (unionIndex896 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, null);
+        } else {
+            if (unionIndex896 == 1) {
+                Utf8 charSequence896;
+                Object oldString896 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(896);
+                if (oldString896 instanceof Utf8) {
+                    charSequence896 = (decoder).readString(((Utf8) oldString896));
+                } else {
+                    charSequence896 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, charSequence896);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F896': "+ unionIndex896));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex897 = (decoder.readIndex());
+        if (unionIndex897 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, null);
+        } else {
+            if (unionIndex897 == 1) {
+                Utf8 charSequence897;
+                Object oldString897 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(897);
+                if (oldString897 instanceof Utf8) {
+                    charSequence897 = (decoder).readString(((Utf8) oldString897));
+                } else {
+                    charSequence897 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, charSequence897);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F897': "+ unionIndex897));
+            }
+        }
+        int unionIndex898 = (decoder.readIndex());
+        if (unionIndex898 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, null);
+        } else {
+            if (unionIndex898 == 1) {
+                Utf8 charSequence898;
+                Object oldString898 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(898);
+                if (oldString898 instanceof Utf8) {
+                    charSequence898 = (decoder).readString(((Utf8) oldString898));
+                } else {
+                    charSequence898 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, charSequence898);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F898': "+ unionIndex898));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex899 = (decoder.readIndex());
+        if (unionIndex899 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, null);
+        } else {
+            if (unionIndex899 == 1) {
+                Utf8 charSequence899;
+                Object oldString899 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(899);
+                if (oldString899 instanceof Utf8) {
+                    charSequence899 = (decoder).readString(((Utf8) oldString899));
+                } else {
+                    charSequence899 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, charSequence899);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F899': "+ unionIndex899));
+            }
+        }
+        int unionIndex900 = (decoder.readIndex());
+        if (unionIndex900 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, null);
+        } else {
+            if (unionIndex900 == 1) {
+                Utf8 charSequence900;
+                Object oldString900 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(900);
+                if (oldString900 instanceof Utf8) {
+                    charSequence900 = (decoder).readString(((Utf8) oldString900));
+                } else {
+                    charSequence900 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, charSequence900);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F900': "+ unionIndex900));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex901 = (decoder.readIndex());
+        if (unionIndex901 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, null);
+        } else {
+            if (unionIndex901 == 1) {
+                Utf8 charSequence901;
+                Object oldString901 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(901);
+                if (oldString901 instanceof Utf8) {
+                    charSequence901 = (decoder).readString(((Utf8) oldString901));
+                } else {
+                    charSequence901 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, charSequence901);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F901': "+ unionIndex901));
+            }
+        }
+        int unionIndex902 = (decoder.readIndex());
+        if (unionIndex902 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, null);
+        } else {
+            if (unionIndex902 == 1) {
+                Utf8 charSequence902;
+                Object oldString902 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(902);
+                if (oldString902 instanceof Utf8) {
+                    charSequence902 = (decoder).readString(((Utf8) oldString902));
+                } else {
+                    charSequence902 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, charSequence902);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F902': "+ unionIndex902));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex903 = (decoder.readIndex());
+        if (unionIndex903 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, null);
+        } else {
+            if (unionIndex903 == 1) {
+                Utf8 charSequence903;
+                Object oldString903 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(903);
+                if (oldString903 instanceof Utf8) {
+                    charSequence903 = (decoder).readString(((Utf8) oldString903));
+                } else {
+                    charSequence903 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, charSequence903);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F903': "+ unionIndex903));
+            }
+        }
+        int unionIndex904 = (decoder.readIndex());
+        if (unionIndex904 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, null);
+        } else {
+            if (unionIndex904 == 1) {
+                Utf8 charSequence904;
+                Object oldString904 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(904);
+                if (oldString904 instanceof Utf8) {
+                    charSequence904 = (decoder).readString(((Utf8) oldString904));
+                } else {
+                    charSequence904 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, charSequence904);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F904': "+ unionIndex904));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex905 = (decoder.readIndex());
+        if (unionIndex905 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, null);
+        } else {
+            if (unionIndex905 == 1) {
+                Utf8 charSequence905;
+                Object oldString905 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(905);
+                if (oldString905 instanceof Utf8) {
+                    charSequence905 = (decoder).readString(((Utf8) oldString905));
+                } else {
+                    charSequence905 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, charSequence905);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F905': "+ unionIndex905));
+            }
+        }
+        int unionIndex906 = (decoder.readIndex());
+        if (unionIndex906 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, null);
+        } else {
+            if (unionIndex906 == 1) {
+                Utf8 charSequence906;
+                Object oldString906 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(906);
+                if (oldString906 instanceof Utf8) {
+                    charSequence906 = (decoder).readString(((Utf8) oldString906));
+                } else {
+                    charSequence906 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, charSequence906);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F906': "+ unionIndex906));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex907 = (decoder.readIndex());
+        if (unionIndex907 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, null);
+        } else {
+            if (unionIndex907 == 1) {
+                Utf8 charSequence907;
+                Object oldString907 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(907);
+                if (oldString907 instanceof Utf8) {
+                    charSequence907 = (decoder).readString(((Utf8) oldString907));
+                } else {
+                    charSequence907 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, charSequence907);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F907': "+ unionIndex907));
+            }
+        }
+        int unionIndex908 = (decoder.readIndex());
+        if (unionIndex908 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, null);
+        } else {
+            if (unionIndex908 == 1) {
+                Utf8 charSequence908;
+                Object oldString908 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(908);
+                if (oldString908 instanceof Utf8) {
+                    charSequence908 = (decoder).readString(((Utf8) oldString908));
+                } else {
+                    charSequence908 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, charSequence908);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F908': "+ unionIndex908));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex909 = (decoder.readIndex());
+        if (unionIndex909 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, null);
+        } else {
+            if (unionIndex909 == 1) {
+                Utf8 charSequence909;
+                Object oldString909 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(909);
+                if (oldString909 instanceof Utf8) {
+                    charSequence909 = (decoder).readString(((Utf8) oldString909));
+                } else {
+                    charSequence909 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, charSequence909);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F909': "+ unionIndex909));
+            }
+        }
+        int unionIndex910 = (decoder.readIndex());
+        if (unionIndex910 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, null);
+        } else {
+            if (unionIndex910 == 1) {
+                Utf8 charSequence910;
+                Object oldString910 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(910);
+                if (oldString910 instanceof Utf8) {
+                    charSequence910 = (decoder).readString(((Utf8) oldString910));
+                } else {
+                    charSequence910 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, charSequence910);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F910': "+ unionIndex910));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex911 = (decoder.readIndex());
+        if (unionIndex911 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, null);
+        } else {
+            if (unionIndex911 == 1) {
+                Utf8 charSequence911;
+                Object oldString911 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(911);
+                if (oldString911 instanceof Utf8) {
+                    charSequence911 = (decoder).readString(((Utf8) oldString911));
+                } else {
+                    charSequence911 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, charSequence911);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F911': "+ unionIndex911));
+            }
+        }
+        int unionIndex912 = (decoder.readIndex());
+        if (unionIndex912 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, null);
+        } else {
+            if (unionIndex912 == 1) {
+                Utf8 charSequence912;
+                Object oldString912 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(912);
+                if (oldString912 instanceof Utf8) {
+                    charSequence912 = (decoder).readString(((Utf8) oldString912));
+                } else {
+                    charSequence912 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, charSequence912);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F912': "+ unionIndex912));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex913 = (decoder.readIndex());
+        if (unionIndex913 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, null);
+        } else {
+            if (unionIndex913 == 1) {
+                Utf8 charSequence913;
+                Object oldString913 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(913);
+                if (oldString913 instanceof Utf8) {
+                    charSequence913 = (decoder).readString(((Utf8) oldString913));
+                } else {
+                    charSequence913 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, charSequence913);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F913': "+ unionIndex913));
+            }
+        }
+        int unionIndex914 = (decoder.readIndex());
+        if (unionIndex914 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, null);
+        } else {
+            if (unionIndex914 == 1) {
+                Utf8 charSequence914;
+                Object oldString914 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(914);
+                if (oldString914 instanceof Utf8) {
+                    charSequence914 = (decoder).readString(((Utf8) oldString914));
+                } else {
+                    charSequence914 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, charSequence914);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F914': "+ unionIndex914));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex915 = (decoder.readIndex());
+        if (unionIndex915 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, null);
+        } else {
+            if (unionIndex915 == 1) {
+                Utf8 charSequence915;
+                Object oldString915 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(915);
+                if (oldString915 instanceof Utf8) {
+                    charSequence915 = (decoder).readString(((Utf8) oldString915));
+                } else {
+                    charSequence915 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, charSequence915);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F915': "+ unionIndex915));
+            }
+        }
+        int unionIndex916 = (decoder.readIndex());
+        if (unionIndex916 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, null);
+        } else {
+            if (unionIndex916 == 1) {
+                Utf8 charSequence916;
+                Object oldString916 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(916);
+                if (oldString916 instanceof Utf8) {
+                    charSequence916 = (decoder).readString(((Utf8) oldString916));
+                } else {
+                    charSequence916 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, charSequence916);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F916': "+ unionIndex916));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex917 = (decoder.readIndex());
+        if (unionIndex917 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, null);
+        } else {
+            if (unionIndex917 == 1) {
+                Utf8 charSequence917;
+                Object oldString917 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(917);
+                if (oldString917 instanceof Utf8) {
+                    charSequence917 = (decoder).readString(((Utf8) oldString917));
+                } else {
+                    charSequence917 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, charSequence917);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F917': "+ unionIndex917));
+            }
+        }
+        int unionIndex918 = (decoder.readIndex());
+        if (unionIndex918 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, null);
+        } else {
+            if (unionIndex918 == 1) {
+                Utf8 charSequence918;
+                Object oldString918 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(918);
+                if (oldString918 instanceof Utf8) {
+                    charSequence918 = (decoder).readString(((Utf8) oldString918));
+                } else {
+                    charSequence918 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, charSequence918);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F918': "+ unionIndex918));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex919 = (decoder.readIndex());
+        if (unionIndex919 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, null);
+        } else {
+            if (unionIndex919 == 1) {
+                Utf8 charSequence919;
+                Object oldString919 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(919);
+                if (oldString919 instanceof Utf8) {
+                    charSequence919 = (decoder).readString(((Utf8) oldString919));
+                } else {
+                    charSequence919 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, charSequence919);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F919': "+ unionIndex919));
+            }
+        }
+        int unionIndex920 = (decoder.readIndex());
+        if (unionIndex920 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, null);
+        } else {
+            if (unionIndex920 == 1) {
+                Utf8 charSequence920;
+                Object oldString920 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(920);
+                if (oldString920 instanceof Utf8) {
+                    charSequence920 = (decoder).readString(((Utf8) oldString920));
+                } else {
+                    charSequence920 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, charSequence920);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F920': "+ unionIndex920));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex921 = (decoder.readIndex());
+        if (unionIndex921 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, null);
+        } else {
+            if (unionIndex921 == 1) {
+                Utf8 charSequence921;
+                Object oldString921 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(921);
+                if (oldString921 instanceof Utf8) {
+                    charSequence921 = (decoder).readString(((Utf8) oldString921));
+                } else {
+                    charSequence921 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, charSequence921);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F921': "+ unionIndex921));
+            }
+        }
+        int unionIndex922 = (decoder.readIndex());
+        if (unionIndex922 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, null);
+        } else {
+            if (unionIndex922 == 1) {
+                Utf8 charSequence922;
+                Object oldString922 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(922);
+                if (oldString922 instanceof Utf8) {
+                    charSequence922 = (decoder).readString(((Utf8) oldString922));
+                } else {
+                    charSequence922 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, charSequence922);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F922': "+ unionIndex922));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex923 = (decoder.readIndex());
+        if (unionIndex923 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, null);
+        } else {
+            if (unionIndex923 == 1) {
+                Utf8 charSequence923;
+                Object oldString923 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(923);
+                if (oldString923 instanceof Utf8) {
+                    charSequence923 = (decoder).readString(((Utf8) oldString923));
+                } else {
+                    charSequence923 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, charSequence923);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F923': "+ unionIndex923));
+            }
+        }
+        int unionIndex924 = (decoder.readIndex());
+        if (unionIndex924 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, null);
+        } else {
+            if (unionIndex924 == 1) {
+                Utf8 charSequence924;
+                Object oldString924 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(924);
+                if (oldString924 instanceof Utf8) {
+                    charSequence924 = (decoder).readString(((Utf8) oldString924));
+                } else {
+                    charSequence924 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, charSequence924);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F924': "+ unionIndex924));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex925 = (decoder.readIndex());
+        if (unionIndex925 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, null);
+        } else {
+            if (unionIndex925 == 1) {
+                Utf8 charSequence925;
+                Object oldString925 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(925);
+                if (oldString925 instanceof Utf8) {
+                    charSequence925 = (decoder).readString(((Utf8) oldString925));
+                } else {
+                    charSequence925 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, charSequence925);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F925': "+ unionIndex925));
+            }
+        }
+        int unionIndex926 = (decoder.readIndex());
+        if (unionIndex926 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, null);
+        } else {
+            if (unionIndex926 == 1) {
+                Utf8 charSequence926;
+                Object oldString926 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(926);
+                if (oldString926 instanceof Utf8) {
+                    charSequence926 = (decoder).readString(((Utf8) oldString926));
+                } else {
+                    charSequence926 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, charSequence926);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F926': "+ unionIndex926));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex927 = (decoder.readIndex());
+        if (unionIndex927 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, null);
+        } else {
+            if (unionIndex927 == 1) {
+                Utf8 charSequence927;
+                Object oldString927 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(927);
+                if (oldString927 instanceof Utf8) {
+                    charSequence927 = (decoder).readString(((Utf8) oldString927));
+                } else {
+                    charSequence927 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, charSequence927);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F927': "+ unionIndex927));
+            }
+        }
+        int unionIndex928 = (decoder.readIndex());
+        if (unionIndex928 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, null);
+        } else {
+            if (unionIndex928 == 1) {
+                Utf8 charSequence928;
+                Object oldString928 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(928);
+                if (oldString928 instanceof Utf8) {
+                    charSequence928 = (decoder).readString(((Utf8) oldString928));
+                } else {
+                    charSequence928 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, charSequence928);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F928': "+ unionIndex928));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex929 = (decoder.readIndex());
+        if (unionIndex929 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, null);
+        } else {
+            if (unionIndex929 == 1) {
+                Utf8 charSequence929;
+                Object oldString929 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(929);
+                if (oldString929 instanceof Utf8) {
+                    charSequence929 = (decoder).readString(((Utf8) oldString929));
+                } else {
+                    charSequence929 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, charSequence929);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F929': "+ unionIndex929));
+            }
+        }
+        int unionIndex930 = (decoder.readIndex());
+        if (unionIndex930 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, null);
+        } else {
+            if (unionIndex930 == 1) {
+                Utf8 charSequence930;
+                Object oldString930 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(930);
+                if (oldString930 instanceof Utf8) {
+                    charSequence930 = (decoder).readString(((Utf8) oldString930));
+                } else {
+                    charSequence930 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, charSequence930);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F930': "+ unionIndex930));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex931 = (decoder.readIndex());
+        if (unionIndex931 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, null);
+        } else {
+            if (unionIndex931 == 1) {
+                Utf8 charSequence931;
+                Object oldString931 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(931);
+                if (oldString931 instanceof Utf8) {
+                    charSequence931 = (decoder).readString(((Utf8) oldString931));
+                } else {
+                    charSequence931 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, charSequence931);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F931': "+ unionIndex931));
+            }
+        }
+        int unionIndex932 = (decoder.readIndex());
+        if (unionIndex932 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, null);
+        } else {
+            if (unionIndex932 == 1) {
+                Utf8 charSequence932;
+                Object oldString932 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(932);
+                if (oldString932 instanceof Utf8) {
+                    charSequence932 = (decoder).readString(((Utf8) oldString932));
+                } else {
+                    charSequence932 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, charSequence932);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F932': "+ unionIndex932));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex933 = (decoder.readIndex());
+        if (unionIndex933 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, null);
+        } else {
+            if (unionIndex933 == 1) {
+                Utf8 charSequence933;
+                Object oldString933 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(933);
+                if (oldString933 instanceof Utf8) {
+                    charSequence933 = (decoder).readString(((Utf8) oldString933));
+                } else {
+                    charSequence933 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, charSequence933);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F933': "+ unionIndex933));
+            }
+        }
+        int unionIndex934 = (decoder.readIndex());
+        if (unionIndex934 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, null);
+        } else {
+            if (unionIndex934 == 1) {
+                Utf8 charSequence934;
+                Object oldString934 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(934);
+                if (oldString934 instanceof Utf8) {
+                    charSequence934 = (decoder).readString(((Utf8) oldString934));
+                } else {
+                    charSequence934 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, charSequence934);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F934': "+ unionIndex934));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex935 = (decoder.readIndex());
+        if (unionIndex935 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, null);
+        } else {
+            if (unionIndex935 == 1) {
+                Utf8 charSequence935;
+                Object oldString935 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(935);
+                if (oldString935 instanceof Utf8) {
+                    charSequence935 = (decoder).readString(((Utf8) oldString935));
+                } else {
+                    charSequence935 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, charSequence935);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F935': "+ unionIndex935));
+            }
+        }
+        int unionIndex936 = (decoder.readIndex());
+        if (unionIndex936 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, null);
+        } else {
+            if (unionIndex936 == 1) {
+                Utf8 charSequence936;
+                Object oldString936 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(936);
+                if (oldString936 instanceof Utf8) {
+                    charSequence936 = (decoder).readString(((Utf8) oldString936));
+                } else {
+                    charSequence936 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, charSequence936);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F936': "+ unionIndex936));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex937 = (decoder.readIndex());
+        if (unionIndex937 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, null);
+        } else {
+            if (unionIndex937 == 1) {
+                Utf8 charSequence937;
+                Object oldString937 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(937);
+                if (oldString937 instanceof Utf8) {
+                    charSequence937 = (decoder).readString(((Utf8) oldString937));
+                } else {
+                    charSequence937 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, charSequence937);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F937': "+ unionIndex937));
+            }
+        }
+        int unionIndex938 = (decoder.readIndex());
+        if (unionIndex938 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, null);
+        } else {
+            if (unionIndex938 == 1) {
+                Utf8 charSequence938;
+                Object oldString938 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(938);
+                if (oldString938 instanceof Utf8) {
+                    charSequence938 = (decoder).readString(((Utf8) oldString938));
+                } else {
+                    charSequence938 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, charSequence938);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F938': "+ unionIndex938));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex939 = (decoder.readIndex());
+        if (unionIndex939 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, null);
+        } else {
+            if (unionIndex939 == 1) {
+                Utf8 charSequence939;
+                Object oldString939 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(939);
+                if (oldString939 instanceof Utf8) {
+                    charSequence939 = (decoder).readString(((Utf8) oldString939));
+                } else {
+                    charSequence939 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, charSequence939);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F939': "+ unionIndex939));
+            }
+        }
+        int unionIndex940 = (decoder.readIndex());
+        if (unionIndex940 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, null);
+        } else {
+            if (unionIndex940 == 1) {
+                Utf8 charSequence940;
+                Object oldString940 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(940);
+                if (oldString940 instanceof Utf8) {
+                    charSequence940 = (decoder).readString(((Utf8) oldString940));
+                } else {
+                    charSequence940 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, charSequence940);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F940': "+ unionIndex940));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex941 = (decoder.readIndex());
+        if (unionIndex941 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, null);
+        } else {
+            if (unionIndex941 == 1) {
+                Utf8 charSequence941;
+                Object oldString941 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(941);
+                if (oldString941 instanceof Utf8) {
+                    charSequence941 = (decoder).readString(((Utf8) oldString941));
+                } else {
+                    charSequence941 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, charSequence941);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F941': "+ unionIndex941));
+            }
+        }
+        int unionIndex942 = (decoder.readIndex());
+        if (unionIndex942 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, null);
+        } else {
+            if (unionIndex942 == 1) {
+                Utf8 charSequence942;
+                Object oldString942 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(942);
+                if (oldString942 instanceof Utf8) {
+                    charSequence942 = (decoder).readString(((Utf8) oldString942));
+                } else {
+                    charSequence942 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, charSequence942);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F942': "+ unionIndex942));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex943 = (decoder.readIndex());
+        if (unionIndex943 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, null);
+        } else {
+            if (unionIndex943 == 1) {
+                Utf8 charSequence943;
+                Object oldString943 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(943);
+                if (oldString943 instanceof Utf8) {
+                    charSequence943 = (decoder).readString(((Utf8) oldString943));
+                } else {
+                    charSequence943 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, charSequence943);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F943': "+ unionIndex943));
+            }
+        }
+        int unionIndex944 = (decoder.readIndex());
+        if (unionIndex944 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, null);
+        } else {
+            if (unionIndex944 == 1) {
+                Utf8 charSequence944;
+                Object oldString944 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(944);
+                if (oldString944 instanceof Utf8) {
+                    charSequence944 = (decoder).readString(((Utf8) oldString944));
+                } else {
+                    charSequence944 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, charSequence944);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F944': "+ unionIndex944));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex945 = (decoder.readIndex());
+        if (unionIndex945 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, null);
+        } else {
+            if (unionIndex945 == 1) {
+                Utf8 charSequence945;
+                Object oldString945 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(945);
+                if (oldString945 instanceof Utf8) {
+                    charSequence945 = (decoder).readString(((Utf8) oldString945));
+                } else {
+                    charSequence945 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, charSequence945);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F945': "+ unionIndex945));
+            }
+        }
+        int unionIndex946 = (decoder.readIndex());
+        if (unionIndex946 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, null);
+        } else {
+            if (unionIndex946 == 1) {
+                Utf8 charSequence946;
+                Object oldString946 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(946);
+                if (oldString946 instanceof Utf8) {
+                    charSequence946 = (decoder).readString(((Utf8) oldString946));
+                } else {
+                    charSequence946 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, charSequence946);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F946': "+ unionIndex946));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex947 = (decoder.readIndex());
+        if (unionIndex947 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, null);
+        } else {
+            if (unionIndex947 == 1) {
+                Utf8 charSequence947;
+                Object oldString947 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(947);
+                if (oldString947 instanceof Utf8) {
+                    charSequence947 = (decoder).readString(((Utf8) oldString947));
+                } else {
+                    charSequence947 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, charSequence947);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F947': "+ unionIndex947));
+            }
+        }
+        int unionIndex948 = (decoder.readIndex());
+        if (unionIndex948 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, null);
+        } else {
+            if (unionIndex948 == 1) {
+                Utf8 charSequence948;
+                Object oldString948 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(948);
+                if (oldString948 instanceof Utf8) {
+                    charSequence948 = (decoder).readString(((Utf8) oldString948));
+                } else {
+                    charSequence948 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, charSequence948);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F948': "+ unionIndex948));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex949 = (decoder.readIndex());
+        if (unionIndex949 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, null);
+        } else {
+            if (unionIndex949 == 1) {
+                Utf8 charSequence949;
+                Object oldString949 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(949);
+                if (oldString949 instanceof Utf8) {
+                    charSequence949 = (decoder).readString(((Utf8) oldString949));
+                } else {
+                    charSequence949 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, charSequence949);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F949': "+ unionIndex949));
+            }
+        }
+        int unionIndex950 = (decoder.readIndex());
+        if (unionIndex950 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, null);
+        } else {
+            if (unionIndex950 == 1) {
+                Utf8 charSequence950;
+                Object oldString950 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(950);
+                if (oldString950 instanceof Utf8) {
+                    charSequence950 = (decoder).readString(((Utf8) oldString950));
+                } else {
+                    charSequence950 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, charSequence950);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F950': "+ unionIndex950));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex951 = (decoder.readIndex());
+        if (unionIndex951 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, null);
+        } else {
+            if (unionIndex951 == 1) {
+                Utf8 charSequence951;
+                Object oldString951 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(951);
+                if (oldString951 instanceof Utf8) {
+                    charSequence951 = (decoder).readString(((Utf8) oldString951));
+                } else {
+                    charSequence951 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, charSequence951);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F951': "+ unionIndex951));
+            }
+        }
+        int unionIndex952 = (decoder.readIndex());
+        if (unionIndex952 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, null);
+        } else {
+            if (unionIndex952 == 1) {
+                Utf8 charSequence952;
+                Object oldString952 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(952);
+                if (oldString952 instanceof Utf8) {
+                    charSequence952 = (decoder).readString(((Utf8) oldString952));
+                } else {
+                    charSequence952 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, charSequence952);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F952': "+ unionIndex952));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex953 = (decoder.readIndex());
+        if (unionIndex953 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, null);
+        } else {
+            if (unionIndex953 == 1) {
+                Utf8 charSequence953;
+                Object oldString953 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(953);
+                if (oldString953 instanceof Utf8) {
+                    charSequence953 = (decoder).readString(((Utf8) oldString953));
+                } else {
+                    charSequence953 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, charSequence953);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F953': "+ unionIndex953));
+            }
+        }
+        int unionIndex954 = (decoder.readIndex());
+        if (unionIndex954 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, null);
+        } else {
+            if (unionIndex954 == 1) {
+                Utf8 charSequence954;
+                Object oldString954 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(954);
+                if (oldString954 instanceof Utf8) {
+                    charSequence954 = (decoder).readString(((Utf8) oldString954));
+                } else {
+                    charSequence954 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, charSequence954);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F954': "+ unionIndex954));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex955 = (decoder.readIndex());
+        if (unionIndex955 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, null);
+        } else {
+            if (unionIndex955 == 1) {
+                Utf8 charSequence955;
+                Object oldString955 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(955);
+                if (oldString955 instanceof Utf8) {
+                    charSequence955 = (decoder).readString(((Utf8) oldString955));
+                } else {
+                    charSequence955 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, charSequence955);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F955': "+ unionIndex955));
+            }
+        }
+        int unionIndex956 = (decoder.readIndex());
+        if (unionIndex956 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, null);
+        } else {
+            if (unionIndex956 == 1) {
+                Utf8 charSequence956;
+                Object oldString956 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(956);
+                if (oldString956 instanceof Utf8) {
+                    charSequence956 = (decoder).readString(((Utf8) oldString956));
+                } else {
+                    charSequence956 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, charSequence956);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F956': "+ unionIndex956));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex957 = (decoder.readIndex());
+        if (unionIndex957 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, null);
+        } else {
+            if (unionIndex957 == 1) {
+                Utf8 charSequence957;
+                Object oldString957 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(957);
+                if (oldString957 instanceof Utf8) {
+                    charSequence957 = (decoder).readString(((Utf8) oldString957));
+                } else {
+                    charSequence957 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, charSequence957);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F957': "+ unionIndex957));
+            }
+        }
+        int unionIndex958 = (decoder.readIndex());
+        if (unionIndex958 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, null);
+        } else {
+            if (unionIndex958 == 1) {
+                Utf8 charSequence958;
+                Object oldString958 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(958);
+                if (oldString958 instanceof Utf8) {
+                    charSequence958 = (decoder).readString(((Utf8) oldString958));
+                } else {
+                    charSequence958 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, charSequence958);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F958': "+ unionIndex958));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex959 = (decoder.readIndex());
+        if (unionIndex959 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, null);
+        } else {
+            if (unionIndex959 == 1) {
+                Utf8 charSequence959;
+                Object oldString959 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(959);
+                if (oldString959 instanceof Utf8) {
+                    charSequence959 = (decoder).readString(((Utf8) oldString959));
+                } else {
+                    charSequence959 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, charSequence959);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F959': "+ unionIndex959));
+            }
+        }
+        int unionIndex960 = (decoder.readIndex());
+        if (unionIndex960 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, null);
+        } else {
+            if (unionIndex960 == 1) {
+                Utf8 charSequence960;
+                Object oldString960 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(960);
+                if (oldString960 instanceof Utf8) {
+                    charSequence960 = (decoder).readString(((Utf8) oldString960));
+                } else {
+                    charSequence960 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, charSequence960);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F960': "+ unionIndex960));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex961 = (decoder.readIndex());
+        if (unionIndex961 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, null);
+        } else {
+            if (unionIndex961 == 1) {
+                Utf8 charSequence961;
+                Object oldString961 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(961);
+                if (oldString961 instanceof Utf8) {
+                    charSequence961 = (decoder).readString(((Utf8) oldString961));
+                } else {
+                    charSequence961 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, charSequence961);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F961': "+ unionIndex961));
+            }
+        }
+        int unionIndex962 = (decoder.readIndex());
+        if (unionIndex962 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, null);
+        } else {
+            if (unionIndex962 == 1) {
+                Utf8 charSequence962;
+                Object oldString962 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(962);
+                if (oldString962 instanceof Utf8) {
+                    charSequence962 = (decoder).readString(((Utf8) oldString962));
+                } else {
+                    charSequence962 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, charSequence962);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F962': "+ unionIndex962));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex963 = (decoder.readIndex());
+        if (unionIndex963 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, null);
+        } else {
+            if (unionIndex963 == 1) {
+                Utf8 charSequence963;
+                Object oldString963 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(963);
+                if (oldString963 instanceof Utf8) {
+                    charSequence963 = (decoder).readString(((Utf8) oldString963));
+                } else {
+                    charSequence963 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, charSequence963);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F963': "+ unionIndex963));
+            }
+        }
+        int unionIndex964 = (decoder.readIndex());
+        if (unionIndex964 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, null);
+        } else {
+            if (unionIndex964 == 1) {
+                Utf8 charSequence964;
+                Object oldString964 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(964);
+                if (oldString964 instanceof Utf8) {
+                    charSequence964 = (decoder).readString(((Utf8) oldString964));
+                } else {
+                    charSequence964 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, charSequence964);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F964': "+ unionIndex964));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex965 = (decoder.readIndex());
+        if (unionIndex965 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, null);
+        } else {
+            if (unionIndex965 == 1) {
+                Utf8 charSequence965;
+                Object oldString965 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(965);
+                if (oldString965 instanceof Utf8) {
+                    charSequence965 = (decoder).readString(((Utf8) oldString965));
+                } else {
+                    charSequence965 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, charSequence965);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F965': "+ unionIndex965));
+            }
+        }
+        int unionIndex966 = (decoder.readIndex());
+        if (unionIndex966 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, null);
+        } else {
+            if (unionIndex966 == 1) {
+                Utf8 charSequence966;
+                Object oldString966 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(966);
+                if (oldString966 instanceof Utf8) {
+                    charSequence966 = (decoder).readString(((Utf8) oldString966));
+                } else {
+                    charSequence966 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, charSequence966);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F966': "+ unionIndex966));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex967 = (decoder.readIndex());
+        if (unionIndex967 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, null);
+        } else {
+            if (unionIndex967 == 1) {
+                Utf8 charSequence967;
+                Object oldString967 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(967);
+                if (oldString967 instanceof Utf8) {
+                    charSequence967 = (decoder).readString(((Utf8) oldString967));
+                } else {
+                    charSequence967 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, charSequence967);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F967': "+ unionIndex967));
+            }
+        }
+        int unionIndex968 = (decoder.readIndex());
+        if (unionIndex968 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, null);
+        } else {
+            if (unionIndex968 == 1) {
+                Utf8 charSequence968;
+                Object oldString968 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(968);
+                if (oldString968 instanceof Utf8) {
+                    charSequence968 = (decoder).readString(((Utf8) oldString968));
+                } else {
+                    charSequence968 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, charSequence968);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F968': "+ unionIndex968));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex969 = (decoder.readIndex());
+        if (unionIndex969 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, null);
+        } else {
+            if (unionIndex969 == 1) {
+                Utf8 charSequence969;
+                Object oldString969 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(969);
+                if (oldString969 instanceof Utf8) {
+                    charSequence969 = (decoder).readString(((Utf8) oldString969));
+                } else {
+                    charSequence969 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, charSequence969);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F969': "+ unionIndex969));
+            }
+        }
+        int unionIndex970 = (decoder.readIndex());
+        if (unionIndex970 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, null);
+        } else {
+            if (unionIndex970 == 1) {
+                Utf8 charSequence970;
+                Object oldString970 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(970);
+                if (oldString970 instanceof Utf8) {
+                    charSequence970 = (decoder).readString(((Utf8) oldString970));
+                } else {
+                    charSequence970 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, charSequence970);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F970': "+ unionIndex970));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex971 = (decoder.readIndex());
+        if (unionIndex971 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, null);
+        } else {
+            if (unionIndex971 == 1) {
+                Utf8 charSequence971;
+                Object oldString971 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(971);
+                if (oldString971 instanceof Utf8) {
+                    charSequence971 = (decoder).readString(((Utf8) oldString971));
+                } else {
+                    charSequence971 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, charSequence971);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F971': "+ unionIndex971));
+            }
+        }
+        int unionIndex972 = (decoder.readIndex());
+        if (unionIndex972 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, null);
+        } else {
+            if (unionIndex972 == 1) {
+                Utf8 charSequence972;
+                Object oldString972 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(972);
+                if (oldString972 instanceof Utf8) {
+                    charSequence972 = (decoder).readString(((Utf8) oldString972));
+                } else {
+                    charSequence972 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, charSequence972);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F972': "+ unionIndex972));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex973 = (decoder.readIndex());
+        if (unionIndex973 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, null);
+        } else {
+            if (unionIndex973 == 1) {
+                Utf8 charSequence973;
+                Object oldString973 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(973);
+                if (oldString973 instanceof Utf8) {
+                    charSequence973 = (decoder).readString(((Utf8) oldString973));
+                } else {
+                    charSequence973 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, charSequence973);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F973': "+ unionIndex973));
+            }
+        }
+        int unionIndex974 = (decoder.readIndex());
+        if (unionIndex974 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, null);
+        } else {
+            if (unionIndex974 == 1) {
+                Utf8 charSequence974;
+                Object oldString974 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(974);
+                if (oldString974 instanceof Utf8) {
+                    charSequence974 = (decoder).readString(((Utf8) oldString974));
+                } else {
+                    charSequence974 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, charSequence974);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F974': "+ unionIndex974));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex975 = (decoder.readIndex());
+        if (unionIndex975 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, null);
+        } else {
+            if (unionIndex975 == 1) {
+                Utf8 charSequence975;
+                Object oldString975 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(975);
+                if (oldString975 instanceof Utf8) {
+                    charSequence975 = (decoder).readString(((Utf8) oldString975));
+                } else {
+                    charSequence975 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, charSequence975);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F975': "+ unionIndex975));
+            }
+        }
+        int unionIndex976 = (decoder.readIndex());
+        if (unionIndex976 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, null);
+        } else {
+            if (unionIndex976 == 1) {
+                Utf8 charSequence976;
+                Object oldString976 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(976);
+                if (oldString976 instanceof Utf8) {
+                    charSequence976 = (decoder).readString(((Utf8) oldString976));
+                } else {
+                    charSequence976 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, charSequence976);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F976': "+ unionIndex976));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex977 = (decoder.readIndex());
+        if (unionIndex977 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, null);
+        } else {
+            if (unionIndex977 == 1) {
+                Utf8 charSequence977;
+                Object oldString977 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(977);
+                if (oldString977 instanceof Utf8) {
+                    charSequence977 = (decoder).readString(((Utf8) oldString977));
+                } else {
+                    charSequence977 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, charSequence977);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F977': "+ unionIndex977));
+            }
+        }
+        int unionIndex978 = (decoder.readIndex());
+        if (unionIndex978 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, null);
+        } else {
+            if (unionIndex978 == 1) {
+                Utf8 charSequence978;
+                Object oldString978 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(978);
+                if (oldString978 instanceof Utf8) {
+                    charSequence978 = (decoder).readString(((Utf8) oldString978));
+                } else {
+                    charSequence978 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, charSequence978);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F978': "+ unionIndex978));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex979 = (decoder.readIndex());
+        if (unionIndex979 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, null);
+        } else {
+            if (unionIndex979 == 1) {
+                Utf8 charSequence979;
+                Object oldString979 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(979);
+                if (oldString979 instanceof Utf8) {
+                    charSequence979 = (decoder).readString(((Utf8) oldString979));
+                } else {
+                    charSequence979 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, charSequence979);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F979': "+ unionIndex979));
+            }
+        }
+        int unionIndex980 = (decoder.readIndex());
+        if (unionIndex980 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, null);
+        } else {
+            if (unionIndex980 == 1) {
+                Utf8 charSequence980;
+                Object oldString980 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(980);
+                if (oldString980 instanceof Utf8) {
+                    charSequence980 = (decoder).readString(((Utf8) oldString980));
+                } else {
+                    charSequence980 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, charSequence980);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F980': "+ unionIndex980));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex981 = (decoder.readIndex());
+        if (unionIndex981 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, null);
+        } else {
+            if (unionIndex981 == 1) {
+                Utf8 charSequence981;
+                Object oldString981 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(981);
+                if (oldString981 instanceof Utf8) {
+                    charSequence981 = (decoder).readString(((Utf8) oldString981));
+                } else {
+                    charSequence981 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, charSequence981);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F981': "+ unionIndex981));
+            }
+        }
+        int unionIndex982 = (decoder.readIndex());
+        if (unionIndex982 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, null);
+        } else {
+            if (unionIndex982 == 1) {
+                Utf8 charSequence982;
+                Object oldString982 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(982);
+                if (oldString982 instanceof Utf8) {
+                    charSequence982 = (decoder).readString(((Utf8) oldString982));
+                } else {
+                    charSequence982 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, charSequence982);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F982': "+ unionIndex982));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex983 = (decoder.readIndex());
+        if (unionIndex983 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, null);
+        } else {
+            if (unionIndex983 == 1) {
+                Utf8 charSequence983;
+                Object oldString983 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(983);
+                if (oldString983 instanceof Utf8) {
+                    charSequence983 = (decoder).readString(((Utf8) oldString983));
+                } else {
+                    charSequence983 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, charSequence983);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F983': "+ unionIndex983));
+            }
+        }
+        int unionIndex984 = (decoder.readIndex());
+        if (unionIndex984 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, null);
+        } else {
+            if (unionIndex984 == 1) {
+                Utf8 charSequence984;
+                Object oldString984 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(984);
+                if (oldString984 instanceof Utf8) {
+                    charSequence984 = (decoder).readString(((Utf8) oldString984));
+                } else {
+                    charSequence984 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, charSequence984);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F984': "+ unionIndex984));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex985 = (decoder.readIndex());
+        if (unionIndex985 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, null);
+        } else {
+            if (unionIndex985 == 1) {
+                Utf8 charSequence985;
+                Object oldString985 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(985);
+                if (oldString985 instanceof Utf8) {
+                    charSequence985 = (decoder).readString(((Utf8) oldString985));
+                } else {
+                    charSequence985 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, charSequence985);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F985': "+ unionIndex985));
+            }
+        }
+        int unionIndex986 = (decoder.readIndex());
+        if (unionIndex986 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, null);
+        } else {
+            if (unionIndex986 == 1) {
+                Utf8 charSequence986;
+                Object oldString986 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(986);
+                if (oldString986 instanceof Utf8) {
+                    charSequence986 = (decoder).readString(((Utf8) oldString986));
+                } else {
+                    charSequence986 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, charSequence986);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F986': "+ unionIndex986));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex987 = (decoder.readIndex());
+        if (unionIndex987 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, null);
+        } else {
+            if (unionIndex987 == 1) {
+                Utf8 charSequence987;
+                Object oldString987 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(987);
+                if (oldString987 instanceof Utf8) {
+                    charSequence987 = (decoder).readString(((Utf8) oldString987));
+                } else {
+                    charSequence987 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, charSequence987);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F987': "+ unionIndex987));
+            }
+        }
+        int unionIndex988 = (decoder.readIndex());
+        if (unionIndex988 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, null);
+        } else {
+            if (unionIndex988 == 1) {
+                Utf8 charSequence988;
+                Object oldString988 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(988);
+                if (oldString988 instanceof Utf8) {
+                    charSequence988 = (decoder).readString(((Utf8) oldString988));
+                } else {
+                    charSequence988 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, charSequence988);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F988': "+ unionIndex988));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex989 = (decoder.readIndex());
+        if (unionIndex989 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, null);
+        } else {
+            if (unionIndex989 == 1) {
+                Utf8 charSequence989;
+                Object oldString989 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(989);
+                if (oldString989 instanceof Utf8) {
+                    charSequence989 = (decoder).readString(((Utf8) oldString989));
+                } else {
+                    charSequence989 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, charSequence989);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F989': "+ unionIndex989));
+            }
+        }
+        int unionIndex990 = (decoder.readIndex());
+        if (unionIndex990 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, null);
+        } else {
+            if (unionIndex990 == 1) {
+                Utf8 charSequence990;
+                Object oldString990 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(990);
+                if (oldString990 instanceof Utf8) {
+                    charSequence990 = (decoder).readString(((Utf8) oldString990));
+                } else {
+                    charSequence990 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, charSequence990);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F990': "+ unionIndex990));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex991 = (decoder.readIndex());
+        if (unionIndex991 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, null);
+        } else {
+            if (unionIndex991 == 1) {
+                Utf8 charSequence991;
+                Object oldString991 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(991);
+                if (oldString991 instanceof Utf8) {
+                    charSequence991 = (decoder).readString(((Utf8) oldString991));
+                } else {
+                    charSequence991 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, charSequence991);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F991': "+ unionIndex991));
+            }
+        }
+        int unionIndex992 = (decoder.readIndex());
+        if (unionIndex992 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, null);
+        } else {
+            if (unionIndex992 == 1) {
+                Utf8 charSequence992;
+                Object oldString992 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(992);
+                if (oldString992 instanceof Utf8) {
+                    charSequence992 = (decoder).readString(((Utf8) oldString992));
+                } else {
+                    charSequence992 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, charSequence992);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F992': "+ unionIndex992));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex993 = (decoder.readIndex());
+        if (unionIndex993 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, null);
+        } else {
+            if (unionIndex993 == 1) {
+                Utf8 charSequence993;
+                Object oldString993 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(993);
+                if (oldString993 instanceof Utf8) {
+                    charSequence993 = (decoder).readString(((Utf8) oldString993));
+                } else {
+                    charSequence993 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, charSequence993);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F993': "+ unionIndex993));
+            }
+        }
+        int unionIndex994 = (decoder.readIndex());
+        if (unionIndex994 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, null);
+        } else {
+            if (unionIndex994 == 1) {
+                Utf8 charSequence994;
+                Object oldString994 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(994);
+                if (oldString994 instanceof Utf8) {
+                    charSequence994 = (decoder).readString(((Utf8) oldString994));
+                } else {
+                    charSequence994 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, charSequence994);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F994': "+ unionIndex994));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex995 = (decoder.readIndex());
+        if (unionIndex995 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, null);
+        } else {
+            if (unionIndex995 == 1) {
+                Utf8 charSequence995;
+                Object oldString995 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(995);
+                if (oldString995 instanceof Utf8) {
+                    charSequence995 = (decoder).readString(((Utf8) oldString995));
+                } else {
+                    charSequence995 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, charSequence995);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F995': "+ unionIndex995));
+            }
+        }
+        int unionIndex996 = (decoder.readIndex());
+        if (unionIndex996 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, null);
+        } else {
+            if (unionIndex996 == 1) {
+                Utf8 charSequence996;
+                Object oldString996 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(996);
+                if (oldString996 instanceof Utf8) {
+                    charSequence996 = (decoder).readString(((Utf8) oldString996));
+                } else {
+                    charSequence996 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, charSequence996);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F996': "+ unionIndex996));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex997 = (decoder.readIndex());
+        if (unionIndex997 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, null);
+        } else {
+            if (unionIndex997 == 1) {
+                Utf8 charSequence997;
+                Object oldString997 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(997);
+                if (oldString997 instanceof Utf8) {
+                    charSequence997 = (decoder).readString(((Utf8) oldString997));
+                } else {
+                    charSequence997 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, charSequence997);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F997': "+ unionIndex997));
+            }
+        }
+        int unionIndex998 = (decoder.readIndex());
+        if (unionIndex998 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, null);
+        } else {
+            if (unionIndex998 == 1) {
+                Utf8 charSequence998;
+                Object oldString998 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(998);
+                if (oldString998 instanceof Utf8) {
+                    charSequence998 = (decoder).readString(((Utf8) oldString998));
+                } else {
+                    charSequence998 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, charSequence998);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F998': "+ unionIndex998));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex999 = (decoder.readIndex());
+        if (unionIndex999 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, null);
+        } else {
+            if (unionIndex999 == 1) {
+                Utf8 charSequence999;
+                Object oldString999 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(999);
+                if (oldString999 instanceof Utf8) {
+                    charSequence999 = (decoder).readString(((Utf8) oldString999));
+                } else {
+                    charSequence999 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, charSequence999);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F999': "+ unionIndex999));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
new file mode 100644
index 000000000..7ce9e779a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
@@ -0,0 +1,122 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Schema testEnumUnion0;
+    private final Schema testEnumArray0;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(0, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                testEnumArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        testEnumUnionArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
new file mode 100644
index 000000000..0898aafa1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testFixed0;
+    private final Schema testFixedUnion0;
+    private final Schema testFixedArray0;
+    private final Schema testFixedUnionArray0;
+    private final Schema testFixedUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testFixed0 = readerSchema.getField("testFixed").schema();
+        this.testFixedUnion0 = readerSchema.getField("testFixedUnion").schema();
+        this.testFixedArray0 = readerSchema.getField("testFixedArray").schema();
+        this.testFixedUnionArray0 = readerSchema.getField("testFixedUnionArray").schema();
+        this.testFixedUnionArrayArrayElemSchema0 = testFixedUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        byte[] testFixed1;
+        Object oldFixed0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(0);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (2))) {
+            testFixed1 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed1 = ( new byte[2]);
+        }
+        decoder.readFixed(testFixed1);
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(0, new org.apache.avro.generic.GenericData.Fixed(testFixed1));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadFixed;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(1);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (2))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed2);
+                FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, new org.apache.avro.generic.GenericData.Fixed(testFixed2));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericFixed> testFixedArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(2);
+        if (oldArray0 instanceof List) {
+            testFixedArray1 = ((List) oldArray0);
+            testFixedArray1 .clear();
+        } else {
+            testFixedArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen0), testFixedArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed3;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (2))) {
+                    testFixed3 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed3 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed3);
+                testFixedArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed3));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(2, testFixedArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(3);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray1 = ((List) oldArray1);
+            testFixedUnionArray1 .clear();
+        } else {
+            testFixedUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen1), testFixedUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        byte[] testFixed4;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (2))) {
+                            testFixed4 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed4 = ( new byte[2]);
+                        }
+                        decoder.readFixed(testFixed4);
+                        testFixedUnionArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed4));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(3, testFixedUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
new file mode 100644
index 000000000..00697777f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
@@ -0,0 +1,102 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema union0;
+    private final Schema unionOptionSchema0;
+    private final Schema subField0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.union0 = readerSchema.getField("union").schema();
+        this.unionOptionSchema0 = union0 .getTypes().get(1);
+        this.subField0 = unionOptionSchema0 .getField("subField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence1;
+                    Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0);
+                    if (oldString1 instanceof Utf8) {
+                        charSequence1 = (decoder).readString(((Utf8) oldString1));
+                    } else {
+                        charSequence1 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, charSequence1);
+                } else {
+                    if (unionIndex0 == 3) {
+                        FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+                    }
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(unionOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
new file mode 100644
index 000000000..fd7ad9856
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
@@ -0,0 +1,129 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapField0;
+    private final Schema mapFieldMapValueSchema0;
+    private final Schema mapFieldValueMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapField0 = readerSchema.getField("mapField").schema();
+        this.mapFieldMapValueSchema0 = mapField0 .getValueType();
+        this.mapFieldValueMapValueSchema0 = mapFieldMapValueSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Map<Utf8, List<Integer>>> mapField1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
+                if (oldMap0 instanceof Map) {
+                    mapFieldReuse0 = ((Map) oldMap0);
+                }
+                if (mapFieldReuse0 != (null)) {
+                    mapFieldReuse0 .clear();
+                    mapField1 = mapFieldReuse0;
+                } else {
+                    mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Map<Utf8, List<Integer>> mapFieldValue0 = null;
+                    long chunkLen1 = (decoder.readMapStart());
+                    if (chunkLen1 > 0) {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, ((int) chunkLen1)));
+                        } else {
+                            Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
+                            if (null instanceof Map) {
+                                mapFieldValueReuse0 = ((Map) null);
+                            }
+                            if (mapFieldValueReuse0 != (null)) {
+                                mapFieldValueReuse0 .clear();
+                                mapFieldValue0 = mapFieldValueReuse0;
+                            } else {
+                                mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                            }
+                        }
+                        do {
+                            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                                Utf8 key1 = (decoder.readString(null));
+                                PrimitiveIntList mapFieldValueValue0 = null;
+                                long chunkLen2 = (decoder.readArrayStart());
+                                if (null instanceof PrimitiveIntList) {
+                                    mapFieldValueValue0 = ((PrimitiveIntList) null);
+                                    mapFieldValueValue0 .clear();
+                                } else {
+                                    mapFieldValueValue0 = new PrimitiveIntArrayList(((int) chunkLen2));
+                                }
+                                while (chunkLen2 > 0) {
+                                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                                        mapFieldValueValue0 .addPrimitive((decoder.readInt()));
+                                    }
+                                    chunkLen2 = (decoder.arrayNext());
+                                }
+                                mapFieldValue0 .put(key1, mapFieldValueValue0);
+                            }
+                            chunkLen1 = (decoder.mapNext());
+                        } while (chunkLen1 > 0);
+                    } else {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, 0));
+                        } else {
+                            mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+                        }
+                    }
+                    mapField1 .put(key0, mapFieldValue0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), 0));
+            } else {
+                mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadNestedMap.put(0, mapField1);
+        return FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
new file mode 100644
index 000000000..dd43e9b88
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
@@ -0,0 +1,206 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(1));
+        tempEnumMapping0 .put(new Integer(1), new Integer(0));
+        tempEnumMapping0 .put(new Integer(2), new Integer(4));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(1));
+        tempEnumMapping1 .put(new Integer(1), new Integer(0));
+        tempEnumMapping1 .put(new Integer(2), new Integer(4));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(1));
+        tempEnumMapping2 .put(new Integer(1), new Integer(0));
+        tempEnumMapping2 .put(new Integer(2), new Integer(4));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(1));
+        tempEnumMapping3 .put(new Integer(1), new Integer(0));
+        tempEnumMapping3 .put(new Integer(2), new Integer(4));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
new file mode 100644
index 000000000..9d6bf3a40
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
@@ -0,0 +1,209 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testIntUnion0;
+    private final Schema testStringUnion0;
+    private final Schema testLongUnion0;
+    private final Schema testDoubleUnion0;
+    private final Schema testFloatUnion0;
+    private final Schema testBooleanUnion0;
+    private final Schema testBytesUnion0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testIntUnion0 = readerSchema.getField("testIntUnion").schema();
+        this.testStringUnion0 = readerSchema.getField("testStringUnion").schema();
+        this.testLongUnion0 = readerSchema.getField("testLongUnion").schema();
+        this.testDoubleUnion0 = readerSchema.getField("testDoubleUnion").schema();
+        this.testFloatUnion0 = readerSchema.getField("testFloatUnion").schema();
+        this.testBooleanUnion0 = readerSchema.getField("testBooleanUnion").schema();
+        this.testBytesUnion0 = readerSchema.getField("testBytesUnion").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(0, (decoder.readInt()));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(2);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(2, charSequence0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(3);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex1));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(4, (decoder.readLong()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(6, (decoder.readDouble()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(8, (decoder.readFloat()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(10, (decoder.readBoolean()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(12);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(12, byteBuffer0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(13);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
new file mode 100644
index 000000000..7baa181ec
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
@@ -0,0 +1,160 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema intFieldField0;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.intFieldField0 = record10 .getField("intField").schema();
+        this.intField0 = record10 .getField("intField").schema();
+        this.subField1 = record10 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = aliasedSubRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(1, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        aliasedSubRecord.put(0, null);
+        return aliasedSubRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                subRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex1));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = subRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
new file mode 100644
index 000000000..9ad00f45a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
@@ -0,0 +1,175 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema record20;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.record20 = readerSchema.getField("record2").schema();
+        this.intField0 = record20 .getField("intField").schema();
+        this.subField1 = record20 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex0));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record20)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record20);
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                subRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex2));
+            }
+        }
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = subRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
new file mode 100644
index 000000000..6a8e0a0eb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArray0;
+    private final Schema recordsArrayArrayElemSchema0;
+    private final Schema subField0;
+    private final Schema recordsMap0;
+    private final Schema recordsArrayUnion0;
+    private final Schema recordsArrayUnionOptionSchema0;
+    private final Schema recordsArrayUnionOptionArrayElemSchema0;
+    private final Schema recordsMapUnion0;
+    private final Schema recordsMapUnionOptionSchema0;
+    private final Schema recordsMapUnionOptionMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArray0 = readerSchema.getField("recordsArray").schema();
+        this.recordsArrayArrayElemSchema0 = recordsArray0 .getElementType();
+        this.subField0 = recordsArrayArrayElemSchema0 .getField("subField").schema();
+        this.recordsMap0 = readerSchema.getField("recordsMap").schema();
+        this.recordsArrayUnion0 = readerSchema.getField("recordsArrayUnion").schema();
+        this.recordsArrayUnionOptionSchema0 = recordsArrayUnion0 .getTypes().get(1);
+        this.recordsArrayUnionOptionArrayElemSchema0 = recordsArrayUnionOptionSchema0 .getElementType();
+        this.recordsMapUnion0 = readerSchema.getField("recordsMapUnion").schema();
+        this.recordsMapUnionOptionSchema0 = recordsMapUnion0 .getTypes().get(1);
+        this.recordsMapUnionOptionMapValueSchema0 = recordsMapUnionOptionSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<IndexedRecord> recordsArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArray1 = ((List) oldArray0);
+            recordsArray1 .clear();
+        } else {
+            recordsArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordsArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(0, recordsArray1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayArrayElemSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> recordsMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap1 = recordsMapReuse0;
+                } else {
+                    recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), 0));
+            } else {
+                recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(1, recordsMap1);
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, null);
+        } else {
+            if (unionIndex1 == 1) {
+                List<IndexedRecord> recordsArrayUnionOption0 = null;
+                long chunkLen2 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray1);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen2), recordsArrayUnionOptionSchema0);
+                }
+                while (chunkLen2 > 0) {
+                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        int unionIndex2 = (decoder.readIndex());
+                        if (unionIndex2 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex2 == 1) {
+                                recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex2));
+                            }
+                        }
+                    }
+                    chunkLen2 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Map<Utf8, IndexedRecord> recordsMapUnionOption0 = null;
+                long chunkLen3 = (decoder.readMapStart());
+                if (chunkLen3 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), ((int) chunkLen3)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex4 = (decoder.readIndex());
+                            if (unionIndex4 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex4 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex4));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.mapNext());
+                    } while (chunkLen3 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
new file mode 100644
index 000000000..dc99989e8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
@@ -0,0 +1,378 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArrayMap0;
+    private final Schema recordsArrayMapArrayElemSchema0;
+    private final Schema recordsArrayMapElemMapValueSchema0;
+    private final Schema recordsArrayMapElemValueOptionSchema0;
+    private final Schema subField0;
+    private final Schema recordsMapArray0;
+    private final Schema recordsMapArrayMapValueSchema0;
+    private final Schema recordsMapArrayValueArrayElemSchema0;
+    private final Schema recordsArrayMapUnion0;
+    private final Schema recordsArrayMapUnionOptionArrayElemSchema0;
+    private final Schema recordsArrayMapUnionOptionElemMapValueSchema0;
+    private final Schema recordsMapArrayUnion0;
+    private final Schema recordsMapArrayUnionOptionSchema0;
+    private final Schema recordsMapArrayUnionOptionValueArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArrayMap0 = readerSchema.getField("recordsArrayMap").schema();
+        this.recordsArrayMapArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapElemMapValueSchema0 = recordsArrayMapArrayElemSchema0 .getValueType();
+        this.recordsArrayMapElemValueOptionSchema0 = recordsArrayMapElemMapValueSchema0 .getTypes().get(1);
+        this.subField0 = recordsArrayMapElemValueOptionSchema0 .getField("subField").schema();
+        this.recordsMapArray0 = readerSchema.getField("recordsMapArray").schema();
+        this.recordsMapArrayMapValueSchema0 = recordsMapArray0 .getValueType();
+        this.recordsMapArrayValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+        this.recordsArrayMapUnion0 = readerSchema.getField("recordsArrayMapUnion").schema();
+        this.recordsArrayMapUnionOptionArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapUnionOptionElemMapValueSchema0 = recordsArrayMapUnionOptionArrayElemSchema0 .getValueType();
+        this.recordsMapArrayUnion0 = readerSchema.getField("recordsMapArrayUnion").schema();
+        this.recordsMapArrayUnionOptionSchema0 = recordsMapArrayUnion0 .getTypes().get(1);
+        this.recordsMapArrayUnionOptionValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Map<Utf8, IndexedRecord>> recordsArrayMap1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArrayMap1 = ((List) oldArray0);
+            recordsArrayMap1 .clear();
+        } else {
+            recordsArrayMap1 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen0), recordsArrayMap0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Map<Utf8, IndexedRecord> recordsArrayMapElem0 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex0 = (decoder.readIndex());
+                            if (unionIndex0 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key0, null);
+                            } else {
+                                if (unionIndex0 == 1) {
+                                    recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex0));
+                                }
+                            }
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                recordsArrayMap1 .add(recordsArrayMapElem0);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(0, recordsArrayMap1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayMapElemValueOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayMapElemValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<IndexedRecord>> recordsMapArray1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray1 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    List<IndexedRecord> recordsMapArrayValue0 = null;
+                    long chunkLen3 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen3), recordsMapArrayMapValueSchema0);
+                    }
+                    while (chunkLen3 > 0) {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex2 = (decoder.readIndex());
+                            if (unionIndex2 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex2 == 1) {
+                                    recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex2));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.arrayNext());
+                    }
+                    recordsMapArray1 .put(key1, recordsMapArrayValue0);
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), 0));
+            } else {
+                recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(1, recordsMapArray1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                List<Map<Utf8, IndexedRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray1);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen4), recordsArrayMap0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen5 = (decoder.readMapStart());
+                        if (chunkLen5 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen5)));
+                            } else {
+                                Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                                    Utf8 key2 = (decoder.readString(null));
+                                    int unionIndex4 = (decoder.readIndex());
+                                    if (unionIndex4 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key2, null);
+                                    } else {
+                                        if (unionIndex4 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex4));
+                                        }
+                                    }
+                                }
+                                chunkLen5 = (decoder.mapNext());
+                            } while (chunkLen5 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readMapStart());
+                if (chunkLen6 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), ((int) chunkLen6)));
+                    } else {
+                        Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            List<IndexedRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen7 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen7), recordsMapArrayMapValueSchema0);
+                            }
+                            while (chunkLen7 > 0) {
+                                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex6 = (decoder.readIndex());
+                                    if (unionIndex6 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex6 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex6));
+                                        }
+                                    }
+                                }
+                                chunkLen7 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key3, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen6 = (decoder.mapNext());
+                    } while (chunkLen6 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
new file mode 100644
index 000000000..15243ea4c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record0;
+    private final Schema recordOptionSchema0;
+    private final Schema subField0;
+    private final Schema field0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record0 = readerSchema.getField("record").schema();
+        this.recordOptionSchema0 = record0 .getTypes().get(1);
+        this.subField0 = recordOptionSchema0 .getField("subField").schema();
+        this.field0 = readerSchema.getField("field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'record': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder), (customization)));
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(2);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
new file mode 100644
index 000000000..a2ab07fb6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testNotRemoved0;
+    private final Schema testNotRemoved20;
+    private final Schema subRecord0;
+    private final Schema subRecordOptionSchema0;
+    private final Schema testNotRemoved1;
+    private final Schema testNotRemoved21;
+    private final Schema subRecordMap0;
+    private final Schema subRecordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testNotRemoved0 = readerSchema.getField("testNotRemoved").schema();
+        this.testNotRemoved20 = readerSchema.getField("testNotRemoved2").schema();
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordOptionSchema0 = subRecord0 .getTypes().get(1);
+        this.testNotRemoved1 = subRecordOptionSchema0 .getField("testNotRemoved").schema();
+        this.testNotRemoved21 = subRecordOptionSchema0 .getField("testNotRemoved2").schema();
+        this.subRecordMap0 = readerSchema.getField("subRecordMap").schema();
+        this.subRecordArray0 = readerSchema.getField("subRecordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex3));
+            }
+        }
+        Map<Utf8, IndexedRecord> subRecordMap1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
+                if (oldMap0 instanceof Map) {
+                    subRecordMapReuse0 = ((Map) oldMap0);
+                }
+                if (subRecordMapReuse0 != (null)) {
+                    subRecordMapReuse0 .clear();
+                    subRecordMap1 = subRecordMapReuse0;
+                } else {
+                    subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), 0));
+            } else {
+                subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(3, subRecordMap1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordOptionSchema0);
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = subRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex4));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex5 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = subRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<IndexedRecord> subRecordArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(4);
+        if (oldArray0 instanceof List) {
+            subRecordArray1 = ((List) oldArray0);
+            subRecordArray1 .clear();
+        } else {
+            subRecordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen1), subRecordArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object subRecordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    subRecordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(4, subRecordArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
new file mode 100644
index 000000000..c472f5b8f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder), (customization)));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubSubRecord0(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subSubRecord0((decoder));
+    }
+
+    private void populate_subSubRecord0(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
new file mode 100644
index 000000000..9332a081a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord10;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord10 = readerSchema.getField("subRecord1").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord10);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubRecord20(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubRecord20(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subRecord20((decoder));
+    }
+
+    private void populate_subRecord20(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder), (customization)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
new file mode 100644
index 000000000..55ef790c8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
new file mode 100644
index 000000000..4d5e38fbb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
new file mode 100644
index 000000000..fa64819c4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException("Found \"long\", expecting [\"null\", \"string\"]");
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
new file mode 100644
index 000000000..6b8ca1934
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
new file mode 100644
index 000000000..98253664f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
new file mode 100644
index 000000000..30e3c0f55
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
new file mode 100644
index 000000000..178228213
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
new file mode 100644
index 000000000..28b7e80c6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
new file mode 100644
index 000000000..a7447161b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
new file mode 100644
index 000000000..b98a176f9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
new file mode 100644
index 000000000..a8f50fd4b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
new file mode 100644
index 000000000..d2c0b518a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
new file mode 100644
index 000000000..1c322d246
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
new file mode 100644
index 000000000..5bfd91b66
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
new file mode 100644
index 000000000..ac7afbd0f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
new file mode 100644
index 000000000..c4997b90c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
new file mode 100644
index 000000000..02287883e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
new file mode 100644
index 000000000..f8cf6603b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
new file mode 100644
index 000000000..1b2fb0279
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
new file mode 100644
index 000000000..993ebabf6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
new file mode 100644
index 000000000..9d619103b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(2);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
new file mode 100644
index 000000000..76b0994d8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
new file mode 100644
index 000000000..2d65b1355
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(2);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
new file mode 100644
index 000000000..6b7514a8a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
new file mode 100644
index 000000000..caf76e31a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
new file mode 100644
index 000000000..4e91bf33f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
new file mode 100644
index 000000000..3c16528b8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_TestRecord_SpecificDeserializer_627532877_627532877.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_TestRecord_SpecificDeserializer_627532877_627532877.java
new file mode 100644
index 000000000..8397e3bf9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_TestRecord_SpecificDeserializer_627532877_627532877.java
@@ -0,0 +1,1071 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_TestRecord_SpecificDeserializer_627532877_627532877
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_TestRecord_SpecificDeserializer_627532877_627532877(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
new file mode 100644
index 000000000..31aafcf83
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericDeserializer_2140000109_2140000109
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema mapValueOptionSchema0;
+    private final Schema field0;
+
+    public Map_of_UNION_GenericDeserializer_2140000109_2140000109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.mapValueOptionSchema0 = mapMapValueSchema0 .getTypes().get(1);
+        this.field0 = mapValueOptionSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapValueOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_UNION_SpecificDeserializer_1258242403_1258242403.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_UNION_SpecificDeserializer_1258242403_1258242403.java
new file mode 100644
index 000000000..a332b8da7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_UNION_SpecificDeserializer_1258242403_1258242403.java
@@ -0,0 +1,1081 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_SpecificDeserializer_1258242403_1258242403
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_UNION_SpecificDeserializer_1258242403_1258242403(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_record_GenericDeserializer_1223705675_568621313.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_record_GenericDeserializer_1223705675_568621313.java
new file mode 100644
index 000000000..19a5ebef3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_record_GenericDeserializer_1223705675_568621313.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1223705675_568621313
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionMapValueSchema0;
+
+    public Map_of_record_GenericDeserializer_1223705675_568621313(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionMapValueSchema0 = readerSchema.getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
+                        if ((reuse) instanceof Map) {
+                            unionOptionReuse0 = ((Map)(reuse));
+                        }
+                        if (unionOptionReuse0 != (null)) {
+                            unionOptionReuse0 .clear();
+                            unionOption0 = unionOptionReuse0;
+                        } else {
+                            unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            unionOption0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+                    } else {
+                        unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_record_GenericDeserializer_1677529043_1677529043.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_record_GenericDeserializer_1677529043_1677529043.java
new file mode 100644
index 000000000..e3022984c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/Map_of_record_GenericDeserializer_1677529043_1677529043.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1677529043_1677529043
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema field0;
+
+    public Map_of_record_GenericDeserializer_1677529043_1677529043(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.field0 = mapMapValueSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
new file mode 100644
index 000000000..b893cd06f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField>
+{
+
+    private final Schema readerSchema;
+
+    public RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRecordWithLargeUnionField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField RecordWithLargeUnionField;
+        if ((reuse)!= null) {
+            RecordWithLargeUnionField = ((com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField)(reuse));
+        } else {
+            RecordWithLargeUnionField = new com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Utf8 charSequence0;
+            Object oldString0 = RecordWithLargeUnionField.get(0);
+            if (oldString0 instanceof Utf8) {
+                charSequence0 = (decoder).readString(((Utf8) oldString0));
+            } else {
+                charSequence0 = (decoder).readString(null);
+            }
+            RecordWithLargeUnionField.put(0, charSequence0);
+        } else {
+            if (unionIndex0 == 1) {
+                RecordWithLargeUnionField.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException(new StringBuilder().append("Found").append(" \"byt").append("es\", ").append("expec").append("ting ").append("[\"str").append("ing\",").append(" \"int").append("\"]").toString());
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+                }
+            }
+        }
+        return RecordWithLargeUnionField;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
new file mode 100644
index 000000000..d8b84bb11
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        return RemovedTypesTestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
new file mode 100644
index 000000000..a4d28dce0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
@@ -0,0 +1,406 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord3((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord4((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord5((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord6((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord7((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord8((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord9((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord10((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord11((RemovedTypesTestRecord), (customization), (decoder));
+        return RemovedTypesTestRecord;
+    }
+
+    private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipBytes();
+        long chunkLen0 = (decoder.readArrayStart());
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object removedBytesArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipBytes();
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.skipBytes();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedBytesUnion': "+ unionIndex0));
+            }
+        }
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    decoder.skipBytes();
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen2 = (decoder.readArrayStart());
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object removedBytesUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex1 == 1) {
+                        decoder.skipBytes();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedBytesUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex2 = (decoder.readIndex());
+                    if (unionIndex2 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex2 == 1) {
+                            decoder.skipBytes();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedBytesUnionMapValue': "+ unionIndex2));
+                        }
+                    }
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipFixed(1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex3 == 1) {
+                decoder.skipFixed(1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedFixedUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen4 = (decoder.readArrayStart());
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object removedFixedArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipFixed(1);
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    decoder.skipFixed(1);
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen6 = (decoder.readArrayStart());
+        while (chunkLen6 > 0) {
+            for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                Object removedFixedUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex4 = (decoder.readIndex());
+                if (unionIndex4 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex4 == 1) {
+                        decoder.skipFixed(1);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedFixedUnionArrayElem': "+ unionIndex4));
+                    }
+                }
+            }
+            chunkLen6 = (decoder.arrayNext());
+        }
+        long chunkLen7 = (decoder.readMapStart());
+        if (chunkLen7 > 0) {
+            do {
+                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    int unionIndex5 = (decoder.readIndex());
+                    if (unionIndex5 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex5 == 1) {
+                            decoder.skipFixed(1);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedFixedUnionMapValue': "+ unionIndex5));
+                        }
+                    }
+                }
+                chunkLen7 = (decoder.mapNext());
+            } while (chunkLen7 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.readEnum();
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.readEnum();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedEnumUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen8 = (decoder.readArrayStart());
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                decoder.readEnum();
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        long chunkLen9 = (decoder.readMapStart());
+        if (chunkLen9 > 0) {
+            do {
+                for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    decoder.readEnum();
+                }
+                chunkLen9 = (decoder.mapNext());
+            } while (chunkLen9 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen10 = (decoder.readArrayStart());
+        while (chunkLen10 > 0) {
+            for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                Object removedEnumUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex7 = (decoder.readIndex());
+                if (unionIndex7 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex7 == 1) {
+                        decoder.readEnum();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedEnumUnionArrayElem': "+ unionIndex7));
+                    }
+                }
+            }
+            chunkLen10 = (decoder.arrayNext());
+        }
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key5 = (decoder.readString(null));
+                    int unionIndex8 = (decoder.readIndex());
+                    if (unionIndex8 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex8 == 1) {
+                            decoder.readEnum();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedEnumUnionMapValue': "+ unionIndex8));
+                        }
+                    }
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializeRemovedSubRecord0(null, (decoder), (customization));
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex9 == 1) {
+                deserializeRemovedSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedSubRecordUnion': "+ unionIndex9));
+            }
+        }
+    }
+
+    public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen12 = (decoder.readArrayStart());
+        while (chunkLen12 > 0) {
+            for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                Object removedSubRecordArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder), (customization));
+            }
+            chunkLen12 = (decoder.arrayNext());
+        }
+        long chunkLen13 = (decoder.readArrayStart());
+        while (chunkLen13 > 0) {
+            for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                Object removedSubRecordUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex10 == 1) {
+                        deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder), (customization));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen13 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen14 = (decoder.readMapStart());
+        if (chunkLen14 > 0) {
+            do {
+                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                    Utf8 key6 = (decoder.readString(null));
+                    deserializeRemovedSubRecord0(null, (decoder), (customization));
+                }
+                chunkLen14 = (decoder.mapNext());
+            } while (chunkLen14 > 0);
+        }
+        long chunkLen15 = (decoder.readMapStart());
+        if (chunkLen15 > 0) {
+            do {
+                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                    Utf8 key7 = (decoder.readString(null));
+                    int unionIndex11 = (decoder.readIndex());
+                    if (unionIndex11 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex11 == 1) {
+                            deserializeRemovedSubRecord0(null, (decoder), (customization));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionMapValue': "+ unionIndex11));
+                        }
+                    }
+                }
+                chunkLen15 = (decoder.mapNext());
+            } while (chunkLen15 > 0);
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/StringableRecord_SpecificDeserializer_842267318_842267318.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/StringableRecord_SpecificDeserializer_842267318_842267318.java
new file mode 100644
index 000000000..ea14ef545
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/StringableRecord_SpecificDeserializer_842267318_842267318.java
@@ -0,0 +1,255 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificDeserializer_842267318_842267318
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.StringableRecord>
+{
+
+    private final Schema readerSchema;
+
+    public StringableRecord_SpecificDeserializer_842267318_842267318(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeStringableRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord;
+        if ((reuse)!= null) {
+            StringableRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableRecord)(reuse));
+        } else {
+            StringableRecord = new com.linkedin.avro.fastserde.generated.avro.StringableRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = StringableRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        StringableRecord.put(0, charSequence0);
+        populate_StringableRecord0((StringableRecord), (customization), (decoder));
+        populate_StringableRecord1((StringableRecord), (customization), (decoder));
+        populate_StringableRecord2((StringableRecord), (customization), (decoder));
+        populate_StringableRecord3((StringableRecord), (customization), (decoder));
+        populate_StringableRecord4((StringableRecord), (customization), (decoder));
+        return StringableRecord;
+    }
+
+    private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = StringableRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        StringableRecord.put(1, charSequence1);
+        Utf8 charSequence2;
+        Object oldString2 = StringableRecord.get(2);
+        if (oldString2 instanceof Utf8) {
+            charSequence2 = (decoder).readString(((Utf8) oldString2));
+        } else {
+            charSequence2 = (decoder).readString(null);
+        }
+        StringableRecord.put(2, charSequence2);
+    }
+
+    private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence3;
+        Object oldString3 = StringableRecord.get(3);
+        if (oldString3 instanceof Utf8) {
+            charSequence3 = (decoder).readString(((Utf8) oldString3));
+        } else {
+            charSequence3 = (decoder).readString(null);
+        }
+        StringableRecord.put(3, charSequence3);
+        Utf8 charSequence4;
+        Object oldString4 = StringableRecord.get(4);
+        if (oldString4 instanceof Utf8) {
+            charSequence4 = (decoder).readString(((Utf8) oldString4));
+        } else {
+            charSequence4 = (decoder).readString(null);
+        }
+        StringableRecord.put(4, charSequence4);
+    }
+
+    private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Utf8> urlArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = StringableRecord.get(5);
+        if (oldArray0 instanceof List) {
+            urlArray0 = ((List) oldArray0);
+            urlArray0 .clear();
+        } else {
+            urlArray0 = new ArrayList<Utf8>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object urlArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    urlArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence5;
+                if (urlArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) urlArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                urlArray0 .add(charSequence5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        StringableRecord.put(5, urlArray0);
+        Map<Utf8, Utf8> urlMap0 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> urlMapReuse0 = null;
+                Object oldMap0 = StringableRecord.get(6);
+                if (oldMap0 instanceof Map) {
+                    urlMapReuse0 = ((Map) oldMap0);
+                }
+                if (urlMapReuse0 != (null)) {
+                    urlMapReuse0 .clear();
+                    urlMap0 = urlMapReuse0;
+                } else {
+                    urlMap0 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence6 = (decoder).readString(null);
+                    urlMap0 .put(key0, charSequence6);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), 0));
+            } else {
+                urlMap0 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        StringableRecord.put(6, urlMap0);
+    }
+
+    private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        StringableRecord.put(7, deserializeStringableSubRecord0(StringableRecord.get(7), (decoder), (customization)));
+        StringableRecord.put(8, deserializeAnotherSubRecord0(StringableRecord.get(8), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord;
+        if ((reuse)!= null) {
+            StringableSubRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableSubRecord)(reuse));
+        } else {
+            StringableSubRecord = new com.linkedin.avro.fastserde.generated.avro.StringableSubRecord();
+        }
+        Utf8 charSequence7;
+        Object oldString5 = StringableSubRecord.get(0);
+        if (oldString5 instanceof Utf8) {
+            charSequence7 = (decoder).readString(((Utf8) oldString5));
+        } else {
+            charSequence7 = (decoder).readString(null);
+        }
+        StringableSubRecord.put(0, charSequence7);
+        populate_StringableSubRecord0((StringableSubRecord), (customization), (decoder));
+        return StringableSubRecord;
+    }
+
+    private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            StringableSubRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence8;
+                Object oldString6 = StringableSubRecord.get(1);
+                if (oldString6 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                StringableSubRecord.put(1, charSequence8);
+            } else {
+                if (unionIndex0 == 2) {
+                    StringableSubRecord.put(1, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullStringIntUnion': "+ unionIndex0));
+                }
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord AnotherSubRecord;
+        if ((reuse)!= null) {
+            AnotherSubRecord = ((com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord)(reuse));
+        } else {
+            AnotherSubRecord = new com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord();
+        }
+        AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder), (customization)));
+        return AnotherSubRecord;
+    }
+
+    private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            StringableRecord.put(9, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence9;
+                Object oldString7 = StringableRecord.get(9);
+                if (oldString7 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                StringableRecord.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'stringUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
new file mode 100644
index 000000000..5d05b2bf2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
@@ -0,0 +1,46 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class TestArrayOfFloats_GenericDeserializer_1408566797_1408566797
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema array_of_float0;
+
+    public TestArrayOfFloats_GenericDeserializer_1408566797_1408566797(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.array_of_float0 = readerSchema.getField("array_of_float").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestArrayOfFloats0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestArrayOfFloats;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestArrayOfFloats = ((IndexedRecord)(reuse));
+        } else {
+            TestArrayOfFloats = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveFloatList array_of_float1 = null;
+        array_of_float1 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestArrayOfFloats.get(0), (decoder)));
+        TestArrayOfFloats.put(0, array_of_float1);
+        return TestArrayOfFloats;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_GenericDeserializer_473555078_473555078.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_GenericDeserializer_473555078_473555078.java
new file mode 100644
index 000000000..576802c40
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_GenericDeserializer_473555078_473555078.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_GenericDeserializer_473555078_473555078
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema map_field0;
+
+    public TestRecord_GenericDeserializer_473555078_473555078(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.map_field0 = readerSchema.getField("map_field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestRecord = ((IndexedRecord)(reuse));
+        } else {
+            TestRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Utf8> map_field1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Utf8> map_fieldReuse0 = null;
+                Object oldMap0 = TestRecord.get(0);
+                if (oldMap0 instanceof Map) {
+                    map_fieldReuse0 = ((Map) oldMap0);
+                }
+                if (map_fieldReuse0 != (null)) {
+                    map_fieldReuse0 .clear();
+                    map_field1 = map_fieldReuse0;
+                } else {
+                    map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence0 = (decoder).readString(null);
+                    map_field1 .put(key0, charSequence0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), 0));
+            } else {
+                map_field1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        TestRecord.put(0, map_field1);
+        return TestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_1898726132_28900457.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_1898726132_28900457.java
new file mode 100644
index 000000000..604fac5cc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_1898726132_28900457.java
@@ -0,0 +1,1032 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1898726132_28900457
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1898726132_28900457(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        TestRecord.put(13, null);
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringAlias': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = SubRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(1);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence3;
+                    Object oldString3 = TestRecord.get(32);
+                    if (oldString3 instanceof Utf8) {
+                        charSequence3 = (decoder).readString(((Utf8) oldString3));
+                    } else {
+                        charSequence3 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence3);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_1991094399_28900457.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_1991094399_28900457.java
new file mode 100644
index 000000000..654482b9b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_1991094399_28900457.java
@@ -0,0 +1,1036 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1991094399_28900457
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1991094399_28900457(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(6);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        tempEnumMapping0 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(6);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        tempEnumMapping1 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(6);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        tempEnumMapping2 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(6);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        tempEnumMapping3 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        TestRecord.put(13, null);
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringAlias': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = SubRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(1);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence3;
+                    Object oldString3 = TestRecord.get(32);
+                    if (oldString3 instanceof Utf8) {
+                        charSequence3 = (decoder).readString(((Utf8) oldString3));
+                    } else {
+                        charSequence3 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence3);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_28900457_28900457.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_28900457_28900457.java
new file mode 100644
index 000000000..dcea56ff0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/TestRecord_SpecificDeserializer_28900457_28900457.java
@@ -0,0 +1,1040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_28900457_28900457
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public TestRecord_SpecificDeserializer_28900457_28900457(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen16 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen16));
+        }
+        while (chunkLen16 > 0) {
+            for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen16 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_1971822364_1672473580.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_1971822364_1672473580.java
new file mode 100644
index 000000000..227b19616
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_1971822364_1672473580.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_1971822364_1672473580
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordRecordSchema0;
+
+    public UNION_GenericDeserializer_1971822364_1672473580(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordRecordSchema0 = readerSchema.getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordRecordSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(recordRecordSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_2018567528_1606337179.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_2018567528_1606337179.java
new file mode 100644
index 000000000..05b0d826a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_2018567528_1606337179.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_2018567528_1606337179
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArraySchema0;
+    private final Schema arrayArrayElemSchema0;
+
+    public UNION_GenericDeserializer_2018567528_1606337179(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArraySchema0 = readerSchema.getTypes().get(1);
+        this.arrayArrayElemSchema0 = arrayArraySchema0 .getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), arrayArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_568621313_1223705675.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_568621313_1223705675.java
new file mode 100644
index 000000000..abbe1704e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UNION_GenericDeserializer_568621313_1223705675.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class UNION_GenericDeserializer_568621313_1223705675
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapSchema0;
+    private final Schema mapMapValueSchema0;
+
+    public UNION_GenericDeserializer_568621313_1223705675(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapSchema0 = readerSchema.getTypes().get(1);
+        this.mapMapValueSchema0 = mapMapSchema0 .getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
new file mode 100644
index 000000000..fe24b6b3b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV1;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV2;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField>
+{
+
+    private final Schema readerSchema;
+
+    public UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeUnionOfRecordsWithSameNameEnumField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField UnionOfRecordsWithSameNameEnumField;
+        if ((reuse)!= null) {
+            UnionOfRecordsWithSameNameEnumField = ((com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField)(reuse));
+        } else {
+            UnionOfRecordsWithSameNameEnumField = new com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+        return UnionOfRecordsWithSameNameEnumField;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV1 MyRecordV1;
+        if ((reuse)!= null) {
+            MyRecordV1 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV1)(reuse));
+        } else {
+            MyRecordV1 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV1();
+        }
+        MyRecordV1 .put(0, Enums.getConstant(MyEnumV1 .class, (decoder.readEnum())));
+        return MyRecordV1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV2 MyRecordV2;
+        if ((reuse)!= null) {
+            MyRecordV2 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV2)(reuse));
+        } else {
+            MyRecordV2 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV2();
+        }
+        MyRecordV2 .put(0, Enums.getConstant(MyEnumV2 .class, (decoder.readEnum())));
+        return MyRecordV2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/recordName_GenericDeserializer_1743054079_1743054079.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/recordName_GenericDeserializer_1743054079_1743054079.java
new file mode 100644
index 000000000..ea1db6b68
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/recordName_GenericDeserializer_1743054079_1743054079.java
@@ -0,0 +1,67 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class recordName_GenericDeserializer_1743054079_1743054079
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionField0;
+
+    public recordName_GenericDeserializer_1743054079_1743054079(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionField0 = readerSchema.getField("unionField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecordName0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord recordName;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            recordName = ((IndexedRecord)(reuse));
+        } else {
+            recordName = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = recordName.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        recordName.put(0, charSequence0);
+        populate_recordName0((recordName), (customization), (decoder));
+        return recordName;
+    }
+
+    private void populate_recordName0(IndexedRecord recordName, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            recordName.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                recordName.put(1, deserializerecordName0(recordName.get(1), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1025741720_1557256887.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1025741720_1557256887.java
new file mode 100644
index 000000000..544f762bf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1025741720_1557256887.java
@@ -0,0 +1,96 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1025741720_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1025741720_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex1 = (decoder.readIndex());
+                            if (unionIndex1 == 0) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                if (unionIndex1 == 1) {
+                                    someIntsOption0 .put(key0, (decoder.readInt()));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'someIntsOptionValue': "+ unionIndex1));
+                                }
+                            }
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1126840752_2099305627.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1126840752_2099305627.java
new file mode 100644
index 000000000..45768f7cc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1126840752_2099305627.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1126840752_2099305627
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1126840752_2099305627(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            if (unionIndex0 == 1) {
+                throw new AvroTypeException("Found \"string\", expecting \"int\"");
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someField': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1191367445_653449771.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1191367445_653449771.java
new file mode 100644
index 000000000..dbfbf1730
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1191367445_653449771.java
@@ -0,0 +1,69 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1191367445_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1191367445_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        someIntsOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1373882843_1971822364.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1373882843_1971822364.java
new file mode 100644
index 000000000..9de06b209
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1373882843_1971822364.java
@@ -0,0 +1,45 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1373882843_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1373882843_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            throw new RuntimeException(("Illegal union index for 'someInt': "+ unionIndex0));
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1556659421_711533897.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1556659421_711533897.java
new file mode 100644
index 000000000..53cd8133d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1556659421_711533897.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1556659421_711533897
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public record_GenericDeserializer_1556659421_711533897(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"subRecord\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"fields\":[{\"name\":\"someInt1\",\"type\":\"int\",\"doc\":\"\"},{\"name\":\"someInt2\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1557256887_1025741720.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1557256887_1025741720.java
new file mode 100644
index 000000000..226e32cb7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1557256887_1025741720.java
@@ -0,0 +1,81 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_1025741720
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+    private final Schema someIntsMapValueSchema0;
+
+    public record_GenericDeserializer_1557256887_1025741720(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+        this.someIntsMapValueSchema0 = someIntsMapSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1557256887_753570467.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1557256887_753570467.java
new file mode 100644
index 000000000..ae2e29a2a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1557256887_753570467.java
@@ -0,0 +1,79 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_753570467
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+
+    public record_GenericDeserializer_1557256887_753570467(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1672473580_1971822364.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1672473580_1971822364.java
new file mode 100644
index 000000000..5690fb8cf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1672473580_1971822364.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1672473580_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1672473580_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                return deserializerecord0((reuse), (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1971822364_1373882843.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1971822364_1373882843.java
new file mode 100644
index 000000000..74ed534c2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_1971822364_1373882843.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1971822364_1373882843
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInt0;
+
+    public record_GenericDeserializer_1971822364_1373882843(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInt0 = readerSchema.getField("someInt").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_653449771_1191367445.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_653449771_1191367445.java
new file mode 100644
index 000000000..5a60fc65e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_653449771_1191367445.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_1191367445
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+
+    public record_GenericDeserializer_653449771_1191367445(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveIntList someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof PrimitiveIntList) {
+            someInts1 = ((PrimitiveIntList) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_653449771_813379571.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_653449771_813379571.java
new file mode 100644
index 000000000..e380bfee5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_653449771_813379571.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_813379571
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+    private final Schema someIntsArrayElemSchema0;
+
+    public record_GenericDeserializer_653449771_813379571(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+        this.someIntsArrayElemSchema0 = someIntsArraySchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof List) {
+            someInts1 = ((List) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new org.apache.avro.generic.GenericData.Array<Integer>(((int) chunkLen0), someIntsArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .add((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_711533897_1556659421.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_711533897_1556659421.java
new file mode 100644
index 000000000..7bfdb4e3a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_711533897_1556659421.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_711533897_1556659421
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+    private final Schema subRecordRecordSchema0;
+
+    public record_GenericDeserializer_711533897_1556659421(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordRecordSchema0 = subRecord0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordRecordSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordRecordSchema0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_753570467_1557256887.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_753570467_1557256887.java
new file mode 100644
index 000000000..beb208efe
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_753570467_1557256887.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_753570467_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_753570467_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            someIntsOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_813379571_653449771.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_813379571_653449771.java
new file mode 100644
index 000000000..0dd9c84df
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/record_GenericDeserializer_813379571_653449771.java
@@ -0,0 +1,83 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_813379571_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_813379571_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object someIntsOptionArrayElementReuseVar0 = null;
+                        if (oldArray0 instanceof GenericArray) {
+                            someIntsOptionArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                        }
+                        int unionIndex1 = (decoder.readIndex());
+                        if (unionIndex1 == 0) {
+                            someIntsOption0 .addPrimitive((decoder.readInt()));
+                        } else {
+                            if (unionIndex1 == 1) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'someIntsOptionElem': "+ unionIndex1));
+                            }
+                        }
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/testRecord_GenericDeserializer_1146484089_1256982207.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/testRecord_GenericDeserializer_1146484089_1256982207.java
new file mode 100644
index 000000000..add3ee76c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_4/testRecord_GenericDeserializer_1146484089_1256982207.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class testRecord_GenericDeserializer_1146484089_1256982207
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+
+    public testRecord_GenericDeserializer_1146484089_1256982207(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.testEnum: No match for C"));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializetestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord testRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            testRecord = ((IndexedRecord)(reuse));
+        } else {
+            testRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        testRecord.put(0, enumValue0);
+        return testRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_BOOLEAN_GenericSerializer_869749973.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_BOOLEAN_GenericSerializer_869749973.java
new file mode 100644
index 000000000..90a276a2d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_BOOLEAN_GenericSerializer_869749973.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_BOOLEAN_GenericSerializer_869749973
+    implements FastSerializer<List<Boolean>>
+{
+
+
+    public void serialize(List<Boolean> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveBooleanList) {
+                PrimitiveBooleanList primitiveList0 = ((PrimitiveBooleanList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_DOUBLE_GenericSerializer_18760307.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_DOUBLE_GenericSerializer_18760307.java
new file mode 100644
index 000000000..337aef403
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_DOUBLE_GenericSerializer_18760307.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_DOUBLE_GenericSerializer_18760307
+    implements FastSerializer<List<Double>>
+{
+
+
+    public void serialize(List<Double> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveDoubleList) {
+                PrimitiveDoubleList primitiveList0 = ((PrimitiveDoubleList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_FLOAT_GenericSerializer_1012670397.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_FLOAT_GenericSerializer_1012670397.java
new file mode 100644
index 000000000..9e6d51e3d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_FLOAT_GenericSerializer_1012670397.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_FLOAT_GenericSerializer_1012670397
+    implements FastSerializer<List<Float>>
+{
+
+
+    public void serialize(List<Float> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_INT_GenericSerializer_1012089072.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_INT_GenericSerializer_1012089072.java
new file mode 100644
index 000000000..8198c9d51
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_INT_GenericSerializer_1012089072.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_INT_GenericSerializer_1012089072
+    implements FastSerializer<List<Integer>>
+{
+
+
+    public void serialize(List<Integer> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_LONG_GenericSerializer_325099267.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_LONG_GenericSerializer_325099267.java
new file mode 100644
index 000000000..15fc14ba2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_LONG_GenericSerializer_325099267.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_LONG_GenericSerializer_325099267
+    implements FastSerializer<List<Long>>
+{
+
+
+    public void serialize(List<Long> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveLongList) {
+                PrimitiveLongList primitiveList0 = ((PrimitiveLongList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_UNION_GenericSerializer_777827233.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_UNION_GenericSerializer_777827233.java
new file mode 100644
index 000000000..386dd5717
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_UNION_GenericSerializer_777827233.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericSerializer_777827233
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord union0 = null;
+                union0 = ((List<IndexedRecord> ) data).get(counter0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_record_GenericSerializer_477614132.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_record_GenericSerializer_477614132.java
new file mode 100644
index 000000000..28759ebc3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Array_of_record_GenericSerializer_477614132.java
@@ -0,0 +1,53 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericSerializer_477614132
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord record0 = null;
+                record0 = ((List<IndexedRecord> ) data).get(counter0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
new file mode 100644
index 000000000..edcddeea2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
@@ -0,0 +1,4527 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        (encoder).writeInt(((Integer) data.get(2)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(3)));
+        (encoder).writeInt(((Integer) data.get(4)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(5)));
+        (encoder).writeInt(((Integer) data.get(6)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(7)));
+        (encoder).writeInt(((Integer) data.get(8)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(9)));
+        (encoder).writeInt(((Integer) data.get(10)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(11)));
+        (encoder).writeInt(((Integer) data.get(12)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(13)));
+        (encoder).writeInt(((Integer) data.get(14)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(15)));
+        (encoder).writeInt(((Integer) data.get(16)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(17)));
+        (encoder).writeInt(((Integer) data.get(18)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(19)));
+        (encoder).writeInt(((Integer) data.get(20)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(21)));
+        (encoder).writeInt(((Integer) data.get(22)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(23)));
+        (encoder).writeInt(((Integer) data.get(24)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(25)));
+        (encoder).writeInt(((Integer) data.get(26)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(27)));
+        (encoder).writeInt(((Integer) data.get(28)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(29)));
+        (encoder).writeInt(((Integer) data.get(30)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(31)));
+        (encoder).writeInt(((Integer) data.get(32)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(33)));
+        (encoder).writeInt(((Integer) data.get(34)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(35)));
+        (encoder).writeInt(((Integer) data.get(36)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(37)));
+        (encoder).writeInt(((Integer) data.get(38)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(39)));
+        (encoder).writeInt(((Integer) data.get(40)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(41)));
+        (encoder).writeInt(((Integer) data.get(42)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(43)));
+        (encoder).writeInt(((Integer) data.get(44)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(45)));
+        (encoder).writeInt(((Integer) data.get(46)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(47)));
+        (encoder).writeInt(((Integer) data.get(48)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(49)));
+        (encoder).writeInt(((Integer) data.get(50)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(51)));
+        (encoder).writeInt(((Integer) data.get(52)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(53)));
+        (encoder).writeInt(((Integer) data.get(54)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(55)));
+        (encoder).writeInt(((Integer) data.get(56)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(57)));
+        (encoder).writeInt(((Integer) data.get(58)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(59)));
+        (encoder).writeInt(((Integer) data.get(60)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(61)));
+        (encoder).writeInt(((Integer) data.get(62)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(63)));
+        (encoder).writeInt(((Integer) data.get(64)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(65)));
+        (encoder).writeInt(((Integer) data.get(66)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(67)));
+        (encoder).writeInt(((Integer) data.get(68)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(69)));
+        (encoder).writeInt(((Integer) data.get(70)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(71)));
+        (encoder).writeInt(((Integer) data.get(72)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(73)));
+        (encoder).writeInt(((Integer) data.get(74)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(75)));
+        (encoder).writeInt(((Integer) data.get(76)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(77)));
+        (encoder).writeInt(((Integer) data.get(78)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(79)));
+        (encoder).writeInt(((Integer) data.get(80)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(81)));
+        (encoder).writeInt(((Integer) data.get(82)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(83)));
+        (encoder).writeInt(((Integer) data.get(84)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(85)));
+        (encoder).writeInt(((Integer) data.get(86)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(87)));
+        (encoder).writeInt(((Integer) data.get(88)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(89)));
+        (encoder).writeInt(((Integer) data.get(90)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(91)));
+        (encoder).writeInt(((Integer) data.get(92)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(93)));
+        (encoder).writeInt(((Integer) data.get(94)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(95)));
+        (encoder).writeInt(((Integer) data.get(96)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(97)));
+        (encoder).writeInt(((Integer) data.get(98)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(99)));
+        (encoder).writeInt(((Integer) data.get(100)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(101)));
+        (encoder).writeInt(((Integer) data.get(102)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(103)));
+        (encoder).writeInt(((Integer) data.get(104)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(105)));
+        (encoder).writeInt(((Integer) data.get(106)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(107)));
+        (encoder).writeInt(((Integer) data.get(108)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(109)));
+        (encoder).writeInt(((Integer) data.get(110)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(111)));
+        (encoder).writeInt(((Integer) data.get(112)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(113)));
+        (encoder).writeInt(((Integer) data.get(114)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(115)));
+        (encoder).writeInt(((Integer) data.get(116)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(117)));
+        (encoder).writeInt(((Integer) data.get(118)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(119)));
+        (encoder).writeInt(((Integer) data.get(120)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(121)));
+        (encoder).writeInt(((Integer) data.get(122)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(123)));
+        (encoder).writeInt(((Integer) data.get(124)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(125)));
+        (encoder).writeInt(((Integer) data.get(126)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(127)));
+        (encoder).writeInt(((Integer) data.get(128)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(129)));
+        (encoder).writeInt(((Integer) data.get(130)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(131)));
+        (encoder).writeInt(((Integer) data.get(132)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(133)));
+        (encoder).writeInt(((Integer) data.get(134)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(135)));
+        (encoder).writeInt(((Integer) data.get(136)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(137)));
+        (encoder).writeInt(((Integer) data.get(138)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(139)));
+        (encoder).writeInt(((Integer) data.get(140)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(141)));
+        (encoder).writeInt(((Integer) data.get(142)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(143)));
+        (encoder).writeInt(((Integer) data.get(144)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(145)));
+        (encoder).writeInt(((Integer) data.get(146)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(147)));
+        (encoder).writeInt(((Integer) data.get(148)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(149)));
+        (encoder).writeInt(((Integer) data.get(150)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(151)));
+        (encoder).writeInt(((Integer) data.get(152)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(153)));
+        (encoder).writeInt(((Integer) data.get(154)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(155)));
+        (encoder).writeInt(((Integer) data.get(156)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(157)));
+        (encoder).writeInt(((Integer) data.get(158)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(159)));
+        (encoder).writeInt(((Integer) data.get(160)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(161)));
+        (encoder).writeInt(((Integer) data.get(162)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(163)));
+        (encoder).writeInt(((Integer) data.get(164)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(165)));
+        (encoder).writeInt(((Integer) data.get(166)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(167)));
+        (encoder).writeInt(((Integer) data.get(168)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(169)));
+        (encoder).writeInt(((Integer) data.get(170)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(171)));
+        (encoder).writeInt(((Integer) data.get(172)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(173)));
+        (encoder).writeInt(((Integer) data.get(174)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(175)));
+        (encoder).writeInt(((Integer) data.get(176)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(177)));
+        (encoder).writeInt(((Integer) data.get(178)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(179)));
+        (encoder).writeInt(((Integer) data.get(180)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(181)));
+        (encoder).writeInt(((Integer) data.get(182)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(183)));
+        (encoder).writeInt(((Integer) data.get(184)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(185)));
+        (encoder).writeInt(((Integer) data.get(186)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(187)));
+        (encoder).writeInt(((Integer) data.get(188)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(189)));
+        (encoder).writeInt(((Integer) data.get(190)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(191)));
+        (encoder).writeInt(((Integer) data.get(192)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(193)));
+        (encoder).writeInt(((Integer) data.get(194)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(195)));
+        (encoder).writeInt(((Integer) data.get(196)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(197)));
+        (encoder).writeInt(((Integer) data.get(198)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(199)));
+        (encoder).writeInt(((Integer) data.get(200)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(201)));
+        (encoder).writeInt(((Integer) data.get(202)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(203)));
+        (encoder).writeInt(((Integer) data.get(204)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(205)));
+        (encoder).writeInt(((Integer) data.get(206)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(207)));
+        (encoder).writeInt(((Integer) data.get(208)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(209)));
+        (encoder).writeInt(((Integer) data.get(210)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(211)));
+        (encoder).writeInt(((Integer) data.get(212)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(213)));
+        (encoder).writeInt(((Integer) data.get(214)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(215)));
+        (encoder).writeInt(((Integer) data.get(216)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(217)));
+        (encoder).writeInt(((Integer) data.get(218)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(219)));
+        (encoder).writeInt(((Integer) data.get(220)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(221)));
+        (encoder).writeInt(((Integer) data.get(222)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(223)));
+        (encoder).writeInt(((Integer) data.get(224)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(225)));
+        (encoder).writeInt(((Integer) data.get(226)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(227)));
+        (encoder).writeInt(((Integer) data.get(228)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(229)));
+        (encoder).writeInt(((Integer) data.get(230)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(231)));
+        (encoder).writeInt(((Integer) data.get(232)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(233)));
+        (encoder).writeInt(((Integer) data.get(234)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(235)));
+        (encoder).writeInt(((Integer) data.get(236)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(237)));
+        (encoder).writeInt(((Integer) data.get(238)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(239)));
+        (encoder).writeInt(((Integer) data.get(240)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(241)));
+        (encoder).writeInt(((Integer) data.get(242)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(243)));
+        (encoder).writeInt(((Integer) data.get(244)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(245)));
+        (encoder).writeInt(((Integer) data.get(246)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(247)));
+        (encoder).writeInt(((Integer) data.get(248)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(249)));
+        (encoder).writeInt(((Integer) data.get(250)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(251)));
+        (encoder).writeInt(((Integer) data.get(252)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(253)));
+        (encoder).writeInt(((Integer) data.get(254)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(255)));
+        (encoder).writeInt(((Integer) data.get(256)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(257)));
+        (encoder).writeInt(((Integer) data.get(258)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(259)));
+        (encoder).writeInt(((Integer) data.get(260)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(261)));
+        (encoder).writeInt(((Integer) data.get(262)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(263)));
+        (encoder).writeInt(((Integer) data.get(264)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(265)));
+        (encoder).writeInt(((Integer) data.get(266)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(267)));
+        (encoder).writeInt(((Integer) data.get(268)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(269)));
+        (encoder).writeInt(((Integer) data.get(270)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(271)));
+        (encoder).writeInt(((Integer) data.get(272)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(273)));
+        (encoder).writeInt(((Integer) data.get(274)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(275)));
+        (encoder).writeInt(((Integer) data.get(276)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(277)));
+        (encoder).writeInt(((Integer) data.get(278)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(279)));
+        (encoder).writeInt(((Integer) data.get(280)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(281)));
+        (encoder).writeInt(((Integer) data.get(282)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(283)));
+        (encoder).writeInt(((Integer) data.get(284)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(285)));
+        (encoder).writeInt(((Integer) data.get(286)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(287)));
+        (encoder).writeInt(((Integer) data.get(288)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(289)));
+        (encoder).writeInt(((Integer) data.get(290)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(291)));
+        (encoder).writeInt(((Integer) data.get(292)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(293)));
+        (encoder).writeInt(((Integer) data.get(294)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(295)));
+        (encoder).writeInt(((Integer) data.get(296)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(297)));
+        (encoder).writeInt(((Integer) data.get(298)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(299)));
+        (encoder).writeInt(((Integer) data.get(300)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(301)));
+        (encoder).writeInt(((Integer) data.get(302)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(303)));
+        (encoder).writeInt(((Integer) data.get(304)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(305)));
+        (encoder).writeInt(((Integer) data.get(306)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(307)));
+        (encoder).writeInt(((Integer) data.get(308)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(309)));
+        (encoder).writeInt(((Integer) data.get(310)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(311)));
+        (encoder).writeInt(((Integer) data.get(312)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(313)));
+        (encoder).writeInt(((Integer) data.get(314)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(315)));
+        (encoder).writeInt(((Integer) data.get(316)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(317)));
+        (encoder).writeInt(((Integer) data.get(318)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(319)));
+        (encoder).writeInt(((Integer) data.get(320)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(321)));
+        (encoder).writeInt(((Integer) data.get(322)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(323)));
+        (encoder).writeInt(((Integer) data.get(324)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(325)));
+        (encoder).writeInt(((Integer) data.get(326)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(327)));
+        (encoder).writeInt(((Integer) data.get(328)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(329)));
+        (encoder).writeInt(((Integer) data.get(330)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(331)));
+        (encoder).writeInt(((Integer) data.get(332)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(333)));
+        (encoder).writeInt(((Integer) data.get(334)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(335)));
+        (encoder).writeInt(((Integer) data.get(336)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(337)));
+        (encoder).writeInt(((Integer) data.get(338)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(339)));
+        (encoder).writeInt(((Integer) data.get(340)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(341)));
+        (encoder).writeInt(((Integer) data.get(342)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(343)));
+        (encoder).writeInt(((Integer) data.get(344)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(345)));
+        (encoder).writeInt(((Integer) data.get(346)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(347)));
+        (encoder).writeInt(((Integer) data.get(348)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(349)));
+        (encoder).writeInt(((Integer) data.get(350)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(351)));
+        (encoder).writeInt(((Integer) data.get(352)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(353)));
+        (encoder).writeInt(((Integer) data.get(354)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(355)));
+        (encoder).writeInt(((Integer) data.get(356)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(357)));
+        (encoder).writeInt(((Integer) data.get(358)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(359)));
+        (encoder).writeInt(((Integer) data.get(360)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(361)));
+        (encoder).writeInt(((Integer) data.get(362)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(363)));
+        (encoder).writeInt(((Integer) data.get(364)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(365)));
+        (encoder).writeInt(((Integer) data.get(366)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(367)));
+        (encoder).writeInt(((Integer) data.get(368)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(369)));
+        (encoder).writeInt(((Integer) data.get(370)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(371)));
+        (encoder).writeInt(((Integer) data.get(372)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(373)));
+        (encoder).writeInt(((Integer) data.get(374)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(375)));
+        (encoder).writeInt(((Integer) data.get(376)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(377)));
+        (encoder).writeInt(((Integer) data.get(378)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(379)));
+        (encoder).writeInt(((Integer) data.get(380)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(381)));
+        (encoder).writeInt(((Integer) data.get(382)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(383)));
+        (encoder).writeInt(((Integer) data.get(384)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(385)));
+        (encoder).writeInt(((Integer) data.get(386)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(387)));
+        (encoder).writeInt(((Integer) data.get(388)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(389)));
+        (encoder).writeInt(((Integer) data.get(390)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(391)));
+        (encoder).writeInt(((Integer) data.get(392)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(393)));
+        (encoder).writeInt(((Integer) data.get(394)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(395)));
+        (encoder).writeInt(((Integer) data.get(396)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(397)));
+        (encoder).writeInt(((Integer) data.get(398)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(399)));
+        (encoder).writeInt(((Integer) data.get(400)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(401)));
+        (encoder).writeInt(((Integer) data.get(402)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(403)));
+        (encoder).writeInt(((Integer) data.get(404)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(405)));
+        (encoder).writeInt(((Integer) data.get(406)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(407)));
+        (encoder).writeInt(((Integer) data.get(408)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(409)));
+        (encoder).writeInt(((Integer) data.get(410)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(411)));
+        (encoder).writeInt(((Integer) data.get(412)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(413)));
+        (encoder).writeInt(((Integer) data.get(414)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(415)));
+        (encoder).writeInt(((Integer) data.get(416)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(417)));
+        (encoder).writeInt(((Integer) data.get(418)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(419)));
+        (encoder).writeInt(((Integer) data.get(420)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(421)));
+        (encoder).writeInt(((Integer) data.get(422)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(423)));
+        (encoder).writeInt(((Integer) data.get(424)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(425)));
+        (encoder).writeInt(((Integer) data.get(426)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(427)));
+        (encoder).writeInt(((Integer) data.get(428)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(429)));
+        (encoder).writeInt(((Integer) data.get(430)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(431)));
+        (encoder).writeInt(((Integer) data.get(432)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(433)));
+        (encoder).writeInt(((Integer) data.get(434)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(435)));
+        (encoder).writeInt(((Integer) data.get(436)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(437)));
+        (encoder).writeInt(((Integer) data.get(438)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(439)));
+        (encoder).writeInt(((Integer) data.get(440)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(441)));
+        (encoder).writeInt(((Integer) data.get(442)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(443)));
+        (encoder).writeInt(((Integer) data.get(444)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(445)));
+        (encoder).writeInt(((Integer) data.get(446)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(447)));
+        (encoder).writeInt(((Integer) data.get(448)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(449)));
+        (encoder).writeInt(((Integer) data.get(450)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(451)));
+        (encoder).writeInt(((Integer) data.get(452)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(453)));
+        (encoder).writeInt(((Integer) data.get(454)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(455)));
+        (encoder).writeInt(((Integer) data.get(456)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(457)));
+        (encoder).writeInt(((Integer) data.get(458)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(459)));
+        (encoder).writeInt(((Integer) data.get(460)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(461)));
+        (encoder).writeInt(((Integer) data.get(462)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(463)));
+        (encoder).writeInt(((Integer) data.get(464)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(465)));
+        (encoder).writeInt(((Integer) data.get(466)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(467)));
+        (encoder).writeInt(((Integer) data.get(468)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(469)));
+        (encoder).writeInt(((Integer) data.get(470)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(471)));
+        (encoder).writeInt(((Integer) data.get(472)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(473)));
+        (encoder).writeInt(((Integer) data.get(474)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(475)));
+        (encoder).writeInt(((Integer) data.get(476)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(477)));
+        (encoder).writeInt(((Integer) data.get(478)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(479)));
+        (encoder).writeInt(((Integer) data.get(480)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(481)));
+        (encoder).writeInt(((Integer) data.get(482)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(483)));
+        (encoder).writeInt(((Integer) data.get(484)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(485)));
+        (encoder).writeInt(((Integer) data.get(486)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(487)));
+        (encoder).writeInt(((Integer) data.get(488)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(489)));
+        (encoder).writeInt(((Integer) data.get(490)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(491)));
+        (encoder).writeInt(((Integer) data.get(492)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(493)));
+        (encoder).writeInt(((Integer) data.get(494)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(495)));
+        (encoder).writeInt(((Integer) data.get(496)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(497)));
+        (encoder).writeInt(((Integer) data.get(498)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(499)));
+        (encoder).writeInt(((Integer) data.get(500)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(501)));
+        (encoder).writeInt(((Integer) data.get(502)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(503)));
+        (encoder).writeInt(((Integer) data.get(504)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(505)));
+        (encoder).writeInt(((Integer) data.get(506)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(507)));
+        (encoder).writeInt(((Integer) data.get(508)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(509)));
+        (encoder).writeInt(((Integer) data.get(510)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(511)));
+        (encoder).writeInt(((Integer) data.get(512)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(513)));
+        (encoder).writeInt(((Integer) data.get(514)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(515)));
+        (encoder).writeInt(((Integer) data.get(516)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(517)));
+        (encoder).writeInt(((Integer) data.get(518)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(519)));
+        (encoder).writeInt(((Integer) data.get(520)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(521)));
+        (encoder).writeInt(((Integer) data.get(522)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(523)));
+        (encoder).writeInt(((Integer) data.get(524)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(525)));
+        (encoder).writeInt(((Integer) data.get(526)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(527)));
+        (encoder).writeInt(((Integer) data.get(528)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(529)));
+        (encoder).writeInt(((Integer) data.get(530)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(531)));
+        (encoder).writeInt(((Integer) data.get(532)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(533)));
+        (encoder).writeInt(((Integer) data.get(534)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(535)));
+        (encoder).writeInt(((Integer) data.get(536)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(537)));
+        (encoder).writeInt(((Integer) data.get(538)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(539)));
+        (encoder).writeInt(((Integer) data.get(540)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(541)));
+        (encoder).writeInt(((Integer) data.get(542)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(543)));
+        (encoder).writeInt(((Integer) data.get(544)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(545)));
+        (encoder).writeInt(((Integer) data.get(546)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(547)));
+        (encoder).writeInt(((Integer) data.get(548)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(549)));
+        (encoder).writeInt(((Integer) data.get(550)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(551)));
+        (encoder).writeInt(((Integer) data.get(552)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(553)));
+        (encoder).writeInt(((Integer) data.get(554)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(555)));
+        (encoder).writeInt(((Integer) data.get(556)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(557)));
+        (encoder).writeInt(((Integer) data.get(558)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(559)));
+        (encoder).writeInt(((Integer) data.get(560)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(561)));
+        (encoder).writeInt(((Integer) data.get(562)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(563)));
+        (encoder).writeInt(((Integer) data.get(564)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(565)));
+        (encoder).writeInt(((Integer) data.get(566)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(567)));
+        (encoder).writeInt(((Integer) data.get(568)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(569)));
+        (encoder).writeInt(((Integer) data.get(570)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(571)));
+        (encoder).writeInt(((Integer) data.get(572)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(573)));
+        (encoder).writeInt(((Integer) data.get(574)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(575)));
+        (encoder).writeInt(((Integer) data.get(576)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(577)));
+        (encoder).writeInt(((Integer) data.get(578)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(579)));
+        (encoder).writeInt(((Integer) data.get(580)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(581)));
+        (encoder).writeInt(((Integer) data.get(582)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(583)));
+        (encoder).writeInt(((Integer) data.get(584)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(585)));
+        (encoder).writeInt(((Integer) data.get(586)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(587)));
+        (encoder).writeInt(((Integer) data.get(588)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(589)));
+        (encoder).writeInt(((Integer) data.get(590)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(591)));
+        (encoder).writeInt(((Integer) data.get(592)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(593)));
+        (encoder).writeInt(((Integer) data.get(594)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(595)));
+        (encoder).writeInt(((Integer) data.get(596)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(597)));
+        (encoder).writeInt(((Integer) data.get(598)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(599)));
+        (encoder).writeInt(((Integer) data.get(600)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(601)));
+        (encoder).writeInt(((Integer) data.get(602)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(603)));
+        (encoder).writeInt(((Integer) data.get(604)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(605)));
+        (encoder).writeInt(((Integer) data.get(606)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(607)));
+        (encoder).writeInt(((Integer) data.get(608)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(609)));
+        (encoder).writeInt(((Integer) data.get(610)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(611)));
+        (encoder).writeInt(((Integer) data.get(612)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(613)));
+        (encoder).writeInt(((Integer) data.get(614)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(615)));
+        (encoder).writeInt(((Integer) data.get(616)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(617)));
+        (encoder).writeInt(((Integer) data.get(618)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(619)));
+        (encoder).writeInt(((Integer) data.get(620)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(621)));
+        (encoder).writeInt(((Integer) data.get(622)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(623)));
+        (encoder).writeInt(((Integer) data.get(624)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(625)));
+        (encoder).writeInt(((Integer) data.get(626)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(627)));
+        (encoder).writeInt(((Integer) data.get(628)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(629)));
+        (encoder).writeInt(((Integer) data.get(630)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(631)));
+        (encoder).writeInt(((Integer) data.get(632)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(633)));
+        (encoder).writeInt(((Integer) data.get(634)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(635)));
+        (encoder).writeInt(((Integer) data.get(636)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(637)));
+        (encoder).writeInt(((Integer) data.get(638)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(639)));
+        (encoder).writeInt(((Integer) data.get(640)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(641)));
+        (encoder).writeInt(((Integer) data.get(642)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(643)));
+        (encoder).writeInt(((Integer) data.get(644)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(645)));
+        (encoder).writeInt(((Integer) data.get(646)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(647)));
+        (encoder).writeInt(((Integer) data.get(648)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(649)));
+        (encoder).writeInt(((Integer) data.get(650)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(651)));
+        (encoder).writeInt(((Integer) data.get(652)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(653)));
+        (encoder).writeInt(((Integer) data.get(654)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(655)));
+        (encoder).writeInt(((Integer) data.get(656)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(657)));
+        (encoder).writeInt(((Integer) data.get(658)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(659)));
+        (encoder).writeInt(((Integer) data.get(660)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(661)));
+        (encoder).writeInt(((Integer) data.get(662)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(663)));
+        (encoder).writeInt(((Integer) data.get(664)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(665)));
+        (encoder).writeInt(((Integer) data.get(666)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(667)));
+        (encoder).writeInt(((Integer) data.get(668)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(669)));
+        (encoder).writeInt(((Integer) data.get(670)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(671)));
+        (encoder).writeInt(((Integer) data.get(672)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(673)));
+        (encoder).writeInt(((Integer) data.get(674)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(675)));
+        (encoder).writeInt(((Integer) data.get(676)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(677)));
+        (encoder).writeInt(((Integer) data.get(678)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(679)));
+        (encoder).writeInt(((Integer) data.get(680)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(681)));
+        (encoder).writeInt(((Integer) data.get(682)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(683)));
+        (encoder).writeInt(((Integer) data.get(684)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(685)));
+        (encoder).writeInt(((Integer) data.get(686)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(687)));
+        (encoder).writeInt(((Integer) data.get(688)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(689)));
+        (encoder).writeInt(((Integer) data.get(690)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(691)));
+        (encoder).writeInt(((Integer) data.get(692)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(693)));
+        (encoder).writeInt(((Integer) data.get(694)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(695)));
+        (encoder).writeInt(((Integer) data.get(696)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(697)));
+        (encoder).writeInt(((Integer) data.get(698)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(699)));
+        (encoder).writeInt(((Integer) data.get(700)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(701)));
+        (encoder).writeInt(((Integer) data.get(702)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(703)));
+        (encoder).writeInt(((Integer) data.get(704)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(705)));
+        (encoder).writeInt(((Integer) data.get(706)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(707)));
+        (encoder).writeInt(((Integer) data.get(708)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(709)));
+        (encoder).writeInt(((Integer) data.get(710)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(711)));
+        (encoder).writeInt(((Integer) data.get(712)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(713)));
+        (encoder).writeInt(((Integer) data.get(714)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(715)));
+        (encoder).writeInt(((Integer) data.get(716)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(717)));
+        (encoder).writeInt(((Integer) data.get(718)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(719)));
+        (encoder).writeInt(((Integer) data.get(720)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(721)));
+        (encoder).writeInt(((Integer) data.get(722)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(723)));
+        (encoder).writeInt(((Integer) data.get(724)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(725)));
+        (encoder).writeInt(((Integer) data.get(726)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(727)));
+        (encoder).writeInt(((Integer) data.get(728)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(729)));
+        (encoder).writeInt(((Integer) data.get(730)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(731)));
+        (encoder).writeInt(((Integer) data.get(732)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(733)));
+        (encoder).writeInt(((Integer) data.get(734)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(735)));
+        (encoder).writeInt(((Integer) data.get(736)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(737)));
+        (encoder).writeInt(((Integer) data.get(738)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(739)));
+        (encoder).writeInt(((Integer) data.get(740)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(741)));
+        (encoder).writeInt(((Integer) data.get(742)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(743)));
+        (encoder).writeInt(((Integer) data.get(744)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(745)));
+        (encoder).writeInt(((Integer) data.get(746)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(747)));
+        (encoder).writeInt(((Integer) data.get(748)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(749)));
+        (encoder).writeInt(((Integer) data.get(750)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(751)));
+        (encoder).writeInt(((Integer) data.get(752)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(753)));
+        (encoder).writeInt(((Integer) data.get(754)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(755)));
+        (encoder).writeInt(((Integer) data.get(756)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(757)));
+        (encoder).writeInt(((Integer) data.get(758)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(759)));
+        (encoder).writeInt(((Integer) data.get(760)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(761)));
+        (encoder).writeInt(((Integer) data.get(762)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(763)));
+        (encoder).writeInt(((Integer) data.get(764)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(765)));
+        (encoder).writeInt(((Integer) data.get(766)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(767)));
+        (encoder).writeInt(((Integer) data.get(768)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(769)));
+        (encoder).writeInt(((Integer) data.get(770)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(771)));
+        (encoder).writeInt(((Integer) data.get(772)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(773)));
+        (encoder).writeInt(((Integer) data.get(774)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(775)));
+        (encoder).writeInt(((Integer) data.get(776)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(777)));
+        (encoder).writeInt(((Integer) data.get(778)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(779)));
+        (encoder).writeInt(((Integer) data.get(780)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(781)));
+        (encoder).writeInt(((Integer) data.get(782)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(783)));
+        (encoder).writeInt(((Integer) data.get(784)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(785)));
+        (encoder).writeInt(((Integer) data.get(786)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(787)));
+        (encoder).writeInt(((Integer) data.get(788)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(789)));
+        (encoder).writeInt(((Integer) data.get(790)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(791)));
+        (encoder).writeInt(((Integer) data.get(792)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(793)));
+        (encoder).writeInt(((Integer) data.get(794)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(795)));
+        (encoder).writeInt(((Integer) data.get(796)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(797)));
+        (encoder).writeInt(((Integer) data.get(798)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(799)));
+        (encoder).writeInt(((Integer) data.get(800)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(801)));
+        (encoder).writeInt(((Integer) data.get(802)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(803)));
+        (encoder).writeInt(((Integer) data.get(804)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(805)));
+        (encoder).writeInt(((Integer) data.get(806)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(807)));
+        (encoder).writeInt(((Integer) data.get(808)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(809)));
+        (encoder).writeInt(((Integer) data.get(810)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(811)));
+        (encoder).writeInt(((Integer) data.get(812)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(813)));
+        (encoder).writeInt(((Integer) data.get(814)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(815)));
+        (encoder).writeInt(((Integer) data.get(816)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(817)));
+        (encoder).writeInt(((Integer) data.get(818)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(819)));
+        (encoder).writeInt(((Integer) data.get(820)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(821)));
+        (encoder).writeInt(((Integer) data.get(822)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(823)));
+        (encoder).writeInt(((Integer) data.get(824)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(825)));
+        (encoder).writeInt(((Integer) data.get(826)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(827)));
+        (encoder).writeInt(((Integer) data.get(828)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(829)));
+        (encoder).writeInt(((Integer) data.get(830)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(831)));
+        (encoder).writeInt(((Integer) data.get(832)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(833)));
+        (encoder).writeInt(((Integer) data.get(834)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(835)));
+        (encoder).writeInt(((Integer) data.get(836)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(837)));
+        (encoder).writeInt(((Integer) data.get(838)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(839)));
+        (encoder).writeInt(((Integer) data.get(840)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(841)));
+        (encoder).writeInt(((Integer) data.get(842)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(843)));
+        (encoder).writeInt(((Integer) data.get(844)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(845)));
+        (encoder).writeInt(((Integer) data.get(846)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(847)));
+        (encoder).writeInt(((Integer) data.get(848)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(849)));
+        (encoder).writeInt(((Integer) data.get(850)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(851)));
+        (encoder).writeInt(((Integer) data.get(852)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(853)));
+        (encoder).writeInt(((Integer) data.get(854)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(855)));
+        (encoder).writeInt(((Integer) data.get(856)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(857)));
+        (encoder).writeInt(((Integer) data.get(858)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(859)));
+        (encoder).writeInt(((Integer) data.get(860)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(861)));
+        (encoder).writeInt(((Integer) data.get(862)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(863)));
+        (encoder).writeInt(((Integer) data.get(864)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(865)));
+        (encoder).writeInt(((Integer) data.get(866)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(867)));
+        (encoder).writeInt(((Integer) data.get(868)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(869)));
+        (encoder).writeInt(((Integer) data.get(870)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(871)));
+        (encoder).writeInt(((Integer) data.get(872)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(873)));
+        (encoder).writeInt(((Integer) data.get(874)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(875)));
+        (encoder).writeInt(((Integer) data.get(876)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(877)));
+        (encoder).writeInt(((Integer) data.get(878)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(879)));
+        (encoder).writeInt(((Integer) data.get(880)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(881)));
+        (encoder).writeInt(((Integer) data.get(882)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(883)));
+        (encoder).writeInt(((Integer) data.get(884)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(885)));
+        (encoder).writeInt(((Integer) data.get(886)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(887)));
+        (encoder).writeInt(((Integer) data.get(888)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(889)));
+        (encoder).writeInt(((Integer) data.get(890)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(891)));
+        (encoder).writeInt(((Integer) data.get(892)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(893)));
+        (encoder).writeInt(((Integer) data.get(894)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(895)));
+        (encoder).writeInt(((Integer) data.get(896)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(897)));
+        (encoder).writeInt(((Integer) data.get(898)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(899)));
+        (encoder).writeInt(((Integer) data.get(900)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(901)));
+        (encoder).writeInt(((Integer) data.get(902)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(903)));
+        (encoder).writeInt(((Integer) data.get(904)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(905)));
+        (encoder).writeInt(((Integer) data.get(906)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(907)));
+        (encoder).writeInt(((Integer) data.get(908)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(909)));
+        (encoder).writeInt(((Integer) data.get(910)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(911)));
+        (encoder).writeInt(((Integer) data.get(912)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(913)));
+        (encoder).writeInt(((Integer) data.get(914)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(915)));
+        (encoder).writeInt(((Integer) data.get(916)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(917)));
+        (encoder).writeInt(((Integer) data.get(918)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(919)));
+        (encoder).writeInt(((Integer) data.get(920)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(921)));
+        (encoder).writeInt(((Integer) data.get(922)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(923)));
+        (encoder).writeInt(((Integer) data.get(924)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(925)));
+        (encoder).writeInt(((Integer) data.get(926)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(927)));
+        (encoder).writeInt(((Integer) data.get(928)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(929)));
+        (encoder).writeInt(((Integer) data.get(930)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(931)));
+        (encoder).writeInt(((Integer) data.get(932)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(933)));
+        (encoder).writeInt(((Integer) data.get(934)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(935)));
+        (encoder).writeInt(((Integer) data.get(936)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(937)));
+        (encoder).writeInt(((Integer) data.get(938)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(939)));
+        (encoder).writeInt(((Integer) data.get(940)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(941)));
+        (encoder).writeInt(((Integer) data.get(942)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(943)));
+        (encoder).writeInt(((Integer) data.get(944)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(945)));
+        (encoder).writeInt(((Integer) data.get(946)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(947)));
+        (encoder).writeInt(((Integer) data.get(948)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(949)));
+        (encoder).writeInt(((Integer) data.get(950)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(951)));
+        (encoder).writeInt(((Integer) data.get(952)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(953)));
+        (encoder).writeInt(((Integer) data.get(954)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(955)));
+        (encoder).writeInt(((Integer) data.get(956)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(957)));
+        (encoder).writeInt(((Integer) data.get(958)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(959)));
+        (encoder).writeInt(((Integer) data.get(960)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(961)));
+        (encoder).writeInt(((Integer) data.get(962)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(963)));
+        (encoder).writeInt(((Integer) data.get(964)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(965)));
+        (encoder).writeInt(((Integer) data.get(966)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(967)));
+        (encoder).writeInt(((Integer) data.get(968)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(969)));
+        (encoder).writeInt(((Integer) data.get(970)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(971)));
+        (encoder).writeInt(((Integer) data.get(972)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(973)));
+        (encoder).writeInt(((Integer) data.get(974)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(975)));
+        (encoder).writeInt(((Integer) data.get(976)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(977)));
+        (encoder).writeInt(((Integer) data.get(978)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(979)));
+        (encoder).writeInt(((Integer) data.get(980)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(981)));
+        (encoder).writeInt(((Integer) data.get(982)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(983)));
+        (encoder).writeInt(((Integer) data.get(984)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(985)));
+        (encoder).writeInt(((Integer) data.get(986)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(987)));
+        (encoder).writeInt(((Integer) data.get(988)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(989)));
+        (encoder).writeInt(((Integer) data.get(990)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(991)));
+        (encoder).writeInt(((Integer) data.get(992)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(993)));
+        (encoder).writeInt(((Integer) data.get(994)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(995)));
+        (encoder).writeInt(((Integer) data.get(996)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(997)));
+        (encoder).writeInt(((Integer) data.get(998)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(999)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
new file mode 100644
index 000000000..ab682d45a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239
+    implements FastSerializer<IndexedRecord>
+{
+
+    private final Schema testEnumEnumSchema0 = Schema.parse("{\"type\":\"enum\",\"name\":\"testEnum\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"symbols\":[\"A\",\"B\"]}");
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = testEnumEnumSchema0 .getEnumOrdinal(((GenericEnumSymbol) data.get(0)).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericEnumSymbol testEnumUnion0 = ((GenericEnumSymbol) data.get(1));
+        if (testEnumUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            int valueToWrite1;
+            Object enumValue1 = testEnumUnion0;
+            if (enumValue1 instanceof Enum) {
+                valueToWrite1 = ((Enum) enumValue1).ordinal();
+            } else {
+                valueToWrite1 = testEnumEnumSchema0 .getEnumOrdinal(((GenericEnumSymbol) testEnumUnion0).toString());
+            }
+            (encoder).writeEnum(valueToWrite1);
+        }
+        List<GenericEnumSymbol> testEnumArray0 = ((List<GenericEnumSymbol> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testEnumArray0 == null)||testEnumArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumArray0 .size());
+            for (int counter0 = 0; (counter0 <testEnumArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                int valueToWrite2;
+                Object enumValue2 = testEnumArray0 .get(counter0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = testEnumEnumSchema0 .getEnumOrdinal(((GenericEnumSymbol) testEnumArray0 .get(counter0)).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray0 = ((List<GenericEnumSymbol> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testEnumUnionArray0 == null)||testEnumUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testEnumUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericEnumSymbol union0 = null;
+                union0 = ((List<GenericEnumSymbol> ) testEnumUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    (encoder).writeIndex(1);
+                    int valueToWrite3;
+                    Object enumValue3 = union0;
+                    if (enumValue3 instanceof Enum) {
+                        valueToWrite3 = ((Enum) enumValue3).ordinal();
+                    } else {
+                        valueToWrite3 = testEnumEnumSchema0 .getEnumOrdinal(((GenericEnumSymbol) union0).toString());
+                    }
+                    (encoder).writeEnum(valueToWrite3);
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
new file mode 100644
index 000000000..f011d2592
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
@@ -0,0 +1,84 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericFixed testFixedUnion0 = ((GenericFixed) data.get(1));
+        if (testFixedUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeFixed(((GenericFixed) testFixedUnion0).bytes());
+        }
+        List<GenericFixed> testFixedArray0 = ((List<GenericFixed> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testFixedArray0 == null)||testFixedArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedArray0 .size());
+            for (int counter0 = 0; (counter0 <testFixedArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeFixed(((GenericFixed) testFixedArray0 .get(counter0)).bytes());
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = ((List<GenericFixed> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testFixedUnionArray0 == null)||testFixedUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testFixedUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericFixed union0 = null;
+                union0 = ((List<GenericFixed> ) testFixedUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    (encoder).writeIndex(1);
+                    (encoder).writeFixed(((GenericFixed) union0).bytes());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
new file mode 100644
index 000000000..80e33e620
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
@@ -0,0 +1,70 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union0 = ((Object) data.get(0));
+        if (union0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+            } else {
+                if (union0 instanceof CharSequence) {
+                    (encoder).writeIndex(2);
+                    if (((CharSequence) union0) instanceof Utf8) {
+                        (encoder).writeString(((Utf8)((CharSequence) union0)));
+                    } else {
+                        (encoder).writeString(((CharSequence) union0).toString());
+                    }
+                } else {
+                    if (union0 instanceof Integer) {
+                        (encoder).writeIndex(3);
+                        (encoder).writeInt(((Integer) union0));
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
new file mode 100644
index 000000000..d9db78804
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
@@ -0,0 +1,157 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Integer testIntUnion0 = ((Integer) data.get(1));
+        if (testIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeInt(((Integer) testIntUnion0));
+        }
+        Integer testFlippedIntUnion0 = ((Integer) data.get(2));
+        if (testFlippedIntUnion0 == null) {
+            (encoder).writeIndex(1);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(0);
+            (encoder).writeInt(((Integer) testFlippedIntUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        CharSequence testStringUnion0 = ((CharSequence) data.get(4));
+        if (testStringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testStringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testStringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) testStringUnion0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(5)));
+        Long testLongUnion0 = ((Long) data.get(6));
+        if (testLongUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) testLongUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeDouble(((Double) data.get(7)));
+        Double testDoubleUnion0 = ((Double) data.get(8));
+        if (testDoubleUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeDouble(((Double) testDoubleUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFloat(((Float) data.get(9)));
+        Float testFloatUnion0 = ((Float) data.get(10));
+        if (testFloatUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeFloat(((Float) testFloatUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBoolean(((Boolean) data.get(11)));
+        Boolean testBooleanUnion0 = ((Boolean) data.get(12));
+        if (testBooleanUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBoolean(((Boolean) testBooleanUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBytes(((ByteBuffer) data.get(13)));
+        ByteBuffer testBytesUnion0 = ((ByteBuffer) data.get(14));
+        if (testBytesUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBytes(((ByteBuffer) testBytesUnion0));
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
new file mode 100644
index 000000000..e12a1dac5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union_field0 = ((Object) data.get(0));
+        if (union_field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record1".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeRecord10(((IndexedRecord) union_field0), (encoder), (customization));
+            } else {
+                if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                    (encoder).writeIndex(2);
+                    serializeRecord20(((IndexedRecord) union_field0), (encoder), (customization));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
new file mode 100644
index 000000000..338a34abc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> recordsArray0 = ((List<IndexedRecord> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArray0 == null)||recordsArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArray0 .size());
+            for (int counter0 = 0; (counter0 <recordsArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord subRecord0 = null;
+                subRecord0 = ((List<IndexedRecord> ) recordsArray0).get(counter0);
+                serializeSubRecord0(subRecord0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMap0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMap0 == null)||recordsMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) recordsMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord subRecord1 = null;
+                subRecord1 = ((Map<CharSequence, IndexedRecord> ) recordsMap0).get(key0);
+                serializeSubRecord0(subRecord1, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+        List<IndexedRecord> recordsArrayUnion0 = ((List<IndexedRecord> ) data.get(2));
+        if (recordsArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<IndexedRecord> ) recordsArrayUnion0) == null)||((List<IndexedRecord> ) recordsArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<IndexedRecord> ) recordsArrayUnion0).size());
+                    for (int counter1 = 0; (counter1 <((List<IndexedRecord> ) recordsArrayUnion0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union0 = null;
+                        union0 = ((List<IndexedRecord> )((List<IndexedRecord> ) recordsArrayUnion0)).get(counter1);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMapUnion0 = ((Map<CharSequence, IndexedRecord> ) data.get(3));
+        if (recordsMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, IndexedRecord> ) recordsMapUnion0) == null)||((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).size());
+                    for (CharSequence key1 : ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key1);
+                        IndexedRecord union1 = null;
+                        union1 = ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).get(key1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
new file mode 100644
index 000000000..1cfcf0a2f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
@@ -0,0 +1,230 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMap0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArrayMap0 == null)||recordsArrayMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArrayMap0 .size());
+            for (int counter0 = 0; (counter0 <recordsArrayMap0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Map<CharSequence, IndexedRecord> map0 = null;
+                map0 = ((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMap0).get(counter0);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(map0);
+                }
+                (encoder).writeMapStart();
+                if ((map0 == null)||map0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(map0 .size());
+                    for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) map0).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        IndexedRecord union0 = null;
+                        union0 = ((Map<CharSequence, IndexedRecord> ) map0).get(key0);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMapArray0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMapArray0 == null)||recordsMapArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMapArray0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                List<IndexedRecord> array0 = null;
+                array0 = ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).get(key1);
+                (encoder).writeArrayStart();
+                if ((array0 == null)||array0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(array0 .size());
+                    for (int counter1 = 0; (counter1 <array0 .size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union1 = null;
+                        union1 = ((List<IndexedRecord> ) array0).get(counter1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        (encoder).writeMapEnd();
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMapUnion0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(2));
+        if (recordsArrayMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayMapUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0) == null)||((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size());
+                    for (int counter2 = 0; (counter2 <((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size()); counter2 ++) {
+                        (encoder).startItem();
+                        Map<CharSequence, IndexedRecord> map1 = null;
+                        map1 = ((List<Map<CharSequence, IndexedRecord>> )((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0)).get(counter2);
+                        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                            (customization).getCheckMapTypeFunction().apply(map1);
+                        }
+                        (encoder).writeMapStart();
+                        if ((map1 == null)||map1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(map1 .size());
+                            for (CharSequence key2 : ((Map<CharSequence, IndexedRecord> ) map1).keySet()) {
+                                (encoder).startItem();
+                                (encoder).writeString(key2);
+                                IndexedRecord union2 = null;
+                                union2 = ((Map<CharSequence, IndexedRecord> ) map1).get(key2);
+                                if (union2 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union2 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union2).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union2), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeMapEnd();
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArrayUnion0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(3));
+        if (recordsMapArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapArrayUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0) == null)||((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).size());
+                    for (CharSequence key3 : ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key3);
+                        List<IndexedRecord> array1 = null;
+                        array1 = ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).get(key3);
+                        (encoder).writeArrayStart();
+                        if ((array1 == null)||array1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(array1 .size());
+                            for (int counter3 = 0; (counter3 <array1 .size()); counter3 ++) {
+                                (encoder).startItem();
+                                IndexedRecord union3 = null;
+                                union3 = ((List<IndexedRecord> ) array1).get(counter3);
+                                if (union3 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union3 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union3).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union3), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeArrayEnd();
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
new file mode 100644
index 000000000..b397ad2c2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record0 = ((IndexedRecord) data.get(0));
+        if (record0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((record0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) record0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) record0), (encoder), (customization));
+            }
+        }
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record10 = ((IndexedRecord) data.get(1));
+        serializeSubRecord0(record10, (encoder), (customization));
+        CharSequence field0 = ((CharSequence) data.get(2));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastSerdeEnums_GenericSerializer_808559686.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastSerdeEnums_GenericSerializer_808559686.java
new file mode 100644
index 000000000..11c38e78b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastSerdeEnums_GenericSerializer_808559686.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeEnums_GenericSerializer_808559686
+    implements FastSerializer<IndexedRecord>
+{
+
+    private final Schema justSimpleEnumEnumSchema0 = Schema.parse("{\"type\":\"enum\",\"name\":\"JustSimpleEnum\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"symbols\":[\"E1\",\"E2\",\"E3\",\"E4\",\"E5\"]}");
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = justSimpleEnumEnumSchema0 .getEnumOrdinal(((GenericEnumSymbol) data.get(0)).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> arrayOfEnums0 = ((List<GenericEnumSymbol> ) data.get(1));
+        if (arrayOfEnums0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfEnums0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericEnumSymbol> ) arrayOfEnums0) == null)||((List<GenericEnumSymbol> ) arrayOfEnums0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericEnumSymbol> ) arrayOfEnums0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericEnumSymbol> ) arrayOfEnums0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        int valueToWrite1;
+                        Object enumValue1 = ((List<GenericEnumSymbol> ) arrayOfEnums0).get(counter0);
+                        if (enumValue1 instanceof Enum) {
+                            valueToWrite1 = ((Enum) enumValue1).ordinal();
+                        } else {
+                            valueToWrite1 = justSimpleEnumEnumSchema0 .getEnumOrdinal(((GenericEnumSymbol)((List<GenericEnumSymbol> ) arrayOfEnums0).get(counter0)).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite1);
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericEnumSymbol> mapOfEnums0 = ((Map<CharSequence, GenericEnumSymbol> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfEnums0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfEnums0 == null)||mapOfEnums0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfEnums0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericEnumSymbol> ) mapOfEnums0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                int valueToWrite2;
+                Object enumValue2 = mapOfEnums0 .get(key0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = justSimpleEnumEnumSchema0 .getEnumOrdinal(((GenericEnumSymbol) mapOfEnums0 .get(key0)).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastSerdeFixed_GenericSerializer_2095283755.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastSerdeFixed_GenericSerializer_2095283755.java
new file mode 100644
index 000000000..70165e18d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastSerdeFixed_GenericSerializer_2095283755.java
@@ -0,0 +1,74 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeFixed_GenericSerializer_2095283755
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> arrayOfFixed0 = ((List<GenericFixed> ) data.get(1));
+        if (arrayOfFixed0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfFixed0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericFixed> ) arrayOfFixed0) == null)||((List<GenericFixed> ) arrayOfFixed0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericFixed> ) arrayOfFixed0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericFixed> ) arrayOfFixed0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFixed(((GenericFixed)((List<GenericFixed> ) arrayOfFixed0).get(counter0)).bytes());
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericFixed> mapOfFixed0 = ((Map<CharSequence, GenericFixed> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfFixed0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfFixed0 == null)||mapOfFixed0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfFixed0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericFixed> ) mapOfFixed0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                (encoder).writeFixed(((GenericFixed) mapOfFixed0 .get(key0)).bytes());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
new file mode 100644
index 000000000..e819ac442
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
new file mode 100644
index 000000000..0bf8a2132
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Map_of_UNION_GenericSerializer_2140000109.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Map_of_UNION_GenericSerializer_2140000109.java
new file mode 100644
index 000000000..5ec091b84
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Map_of_UNION_GenericSerializer_2140000109.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericSerializer_2140000109
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord union0 = null;
+                union0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Map_of_record_GenericSerializer_1677529043.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Map_of_record_GenericSerializer_1677529043.java
new file mode 100644
index 000000000..7487d7de9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/Map_of_record_GenericSerializer_1677529043.java
@@ -0,0 +1,57 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericSerializer_1677529043
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord record0 = null;
+                record0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/StringableRecord_SpecificSerializer_842267318.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/StringableRecord_SpecificSerializer_842267318.java
new file mode 100644
index 000000000..0af8bddb2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/StringableRecord_SpecificSerializer_842267318.java
@@ -0,0 +1,189 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableSubRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificSerializer_842267318
+    implements FastSerializer<StringableRecord>
+{
+
+
+    public void serialize(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeStringableRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_StringableRecord0(data, (encoder), (customization));
+        serialize_StringableRecord1(data, (encoder), (customization));
+        serialize_StringableRecord2(data, (encoder), (customization));
+        serialize_StringableRecord3(data, (encoder), (customization));
+        serialize_StringableRecord4(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(1)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(1))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(1)).toString());
+        }
+        if (((CharSequence) data.get(2)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(2))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(2)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord1(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        if (((CharSequence) data.get(4)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(4))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(4)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord2(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<CharSequence> urlArray0 = ((List<CharSequence> ) data.get(5));
+        (encoder).writeArrayStart();
+        if ((urlArray0 == null)||urlArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlArray0 .size());
+            for (int counter0 = 0; (counter0 <urlArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (urlArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) urlArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(urlArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+        Map<CharSequence, CharSequence> urlMap0 = ((Map<CharSequence, CharSequence> ) data.get(6));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(urlMap0);
+        }
+        (encoder).writeMapStart();
+        if ((urlMap0 == null)||urlMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) urlMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) urlMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) urlMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) urlMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord3(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord0 = ((StringableSubRecord) data.get(7));
+        serializeStringableSubRecord0(subRecord0, (encoder), (customization));
+        AnotherSubRecord subRecordWithSubRecord0 = ((AnotherSubRecord) data.get(8));
+        serializeAnotherSubRecord0(subRecordWithSubRecord0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_StringableSubRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object nullStringIntUnion0 = ((Object) data.get(1));
+        if (nullStringIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullStringIntUnion0 instanceof CharSequence) {
+                (encoder).writeIndex(1);
+                if (((CharSequence) nullStringIntUnion0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) nullStringIntUnion0)));
+                } else {
+                    (encoder).writeString(((CharSequence) nullStringIntUnion0).toString());
+                }
+            } else {
+                if (nullStringIntUnion0 instanceof Integer) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeInt(((Integer) nullStringIntUnion0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord1 = ((StringableSubRecord) data.get(0));
+        serializeStringableSubRecord0(subRecord1, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord4(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence stringUnion0 = ((CharSequence) data.get(9));
+        if (stringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) stringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) stringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) stringUnion0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/TestArrayOfFloats_GenericSerializer_1408566797.java b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/TestArrayOfFloats_GenericSerializer_1408566797.java
new file mode 100644
index 000000000..af4f0ee77
--- /dev/null
+++ b/fastserde/avro-fastserde-tests14/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_4/TestArrayOfFloats_GenericSerializer_1408566797.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_4;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class TestArrayOfFloats_GenericSerializer_1408566797
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeTestArrayOfFloats0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Float> array_of_float0 = ((List<Float> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((array_of_float0 == null)||array_of_float0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(array_of_float0 .size());
+            Object array0 = array_of_float0;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <array_of_float0 .size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(array_of_float0 .get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
new file mode 100644
index 000000000..c3b848d97
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_BOOLEAN_GenericDeserializer_869749973_869749973
+    implements FastDeserializer<List<Boolean>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_BOOLEAN_GenericDeserializer_869749973_869749973(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveBooleanList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveBooleanList) {
+            array0 = ((PrimitiveBooleanList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveBooleanArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
new file mode 100644
index 000000000..61af4ffa9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_DOUBLE_GenericDeserializer_18760307_18760307
+    implements FastDeserializer<List<Double>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_DOUBLE_GenericDeserializer_18760307_18760307(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Double> deserialize(List<Double> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveDoubleList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveDoubleList) {
+            array0 = ((PrimitiveDoubleList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveDoubleArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
new file mode 100644
index 000000000..593dc4ef4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
@@ -0,0 +1,31 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_FLOAT_GenericDeserializer_1012670397_1012670397
+    implements FastDeserializer<List<Float>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_FLOAT_GenericDeserializer_1012670397_1012670397(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Float> deserialize(List<Float> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveFloatList array0 = null;
+        array0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray((reuse), (decoder)));
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_INT_GenericDeserializer_1012089072_1012089072.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
new file mode 100644
index 000000000..2051604a4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_INT_GenericDeserializer_1012089072_1012089072
+    implements FastDeserializer<List<Integer>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_INT_GenericDeserializer_1012089072_1012089072(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Integer> deserialize(List<Integer> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveIntList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveIntList) {
+            array0 = ((PrimitiveIntList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_LONG_GenericDeserializer_325099267_325099267.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_LONG_GenericDeserializer_325099267_325099267.java
new file mode 100644
index 000000000..b9e02d25d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_LONG_GenericDeserializer_325099267_325099267.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_LONG_GenericDeserializer_325099267_325099267
+    implements FastDeserializer<List<Long>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_LONG_GenericDeserializer_325099267_325099267(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Long> deserialize(List<Long> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveLongList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveLongList) {
+            array0 = ((PrimitiveLongList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveLongArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
new file mode 100644
index 000000000..b718bcefb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
@@ -0,0 +1,1058 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_UNION_GenericDeserializer_777827233_777827233.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_UNION_GenericDeserializer_777827233_777827233.java
new file mode 100644
index 000000000..c792b1b85
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_UNION_GenericDeserializer_777827233_777827233.java
@@ -0,0 +1,94 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericDeserializer_777827233_777827233
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema arrayElemOptionSchema0;
+    private final Schema field0;
+
+    public Array_of_UNION_GenericDeserializer_777827233_777827233(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.arrayElemOptionSchema0 = arrayArrayElemSchema0 .getTypes().get(1);
+        this.field0 = arrayElemOptionSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayElemOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayElemOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
new file mode 100644
index 000000000..e80122ba9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
@@ -0,0 +1,1068 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_SpecificDeserializer_1277939469_1277939469
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_UNION_SpecificDeserializer_1277939469_1277939469(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_record_GenericDeserializer_1606337179_2018567528.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_record_GenericDeserializer_1606337179_2018567528.java
new file mode 100644
index 000000000..35dd80538
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_record_GenericDeserializer_1606337179_2018567528.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_record_GenericDeserializer_1606337179_2018567528
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionArrayElemSchema0;
+
+    public Array_of_record_GenericDeserializer_1606337179_2018567528(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionArrayElemSchema0 = readerSchema.getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                List<IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                if ((reuse) instanceof List) {
+                    unionOption0 = ((List)(reuse));
+                    unionOption0 .clear();
+                } else {
+                    unionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object unionOptionArrayElementReuseVar0 = null;
+                        if ((reuse) instanceof GenericArray) {
+                            unionOptionArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                        }
+                        unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder), (customization)));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_record_GenericDeserializer_477614132_477614132.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_record_GenericDeserializer_477614132_477614132.java
new file mode 100644
index 000000000..97d4dd614
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Array_of_record_GenericDeserializer_477614132_477614132.java
@@ -0,0 +1,82 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericDeserializer_477614132_477614132
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema field0;
+
+    public Array_of_record_GenericDeserializer_477614132_477614132(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.field0 = arrayArrayElemSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
new file mode 100644
index 000000000..a12d99500
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
@@ -0,0 +1,23040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema f00;
+    private final Schema f10;
+    private final Schema f20;
+    private final Schema f30;
+    private final Schema f40;
+    private final Schema f50;
+    private final Schema f60;
+    private final Schema f70;
+    private final Schema f80;
+    private final Schema f90;
+    private final Schema f100;
+    private final Schema f110;
+    private final Schema f120;
+    private final Schema f130;
+    private final Schema f140;
+    private final Schema f150;
+    private final Schema f160;
+    private final Schema f170;
+    private final Schema f180;
+    private final Schema f190;
+    private final Schema f200;
+    private final Schema f210;
+    private final Schema f220;
+    private final Schema f230;
+    private final Schema f240;
+    private final Schema f250;
+    private final Schema f260;
+    private final Schema f270;
+    private final Schema f280;
+    private final Schema f290;
+    private final Schema f300;
+    private final Schema f310;
+    private final Schema f320;
+    private final Schema f330;
+    private final Schema f340;
+    private final Schema f350;
+    private final Schema f360;
+    private final Schema f370;
+    private final Schema f380;
+    private final Schema f390;
+    private final Schema f400;
+    private final Schema f410;
+    private final Schema f420;
+    private final Schema f430;
+    private final Schema f440;
+    private final Schema f450;
+    private final Schema f460;
+    private final Schema f470;
+    private final Schema f480;
+    private final Schema f490;
+    private final Schema f500;
+    private final Schema f510;
+    private final Schema f520;
+    private final Schema f530;
+    private final Schema f540;
+    private final Schema f550;
+    private final Schema f560;
+    private final Schema f570;
+    private final Schema f580;
+    private final Schema f590;
+    private final Schema f600;
+    private final Schema f610;
+    private final Schema f620;
+    private final Schema f630;
+    private final Schema f640;
+    private final Schema f650;
+    private final Schema f660;
+    private final Schema f670;
+    private final Schema f680;
+    private final Schema f690;
+    private final Schema f700;
+    private final Schema f710;
+    private final Schema f720;
+    private final Schema f730;
+    private final Schema f740;
+    private final Schema f750;
+    private final Schema f760;
+    private final Schema f770;
+    private final Schema f780;
+    private final Schema f790;
+    private final Schema f800;
+    private final Schema f810;
+    private final Schema f820;
+    private final Schema f830;
+    private final Schema f840;
+    private final Schema f850;
+    private final Schema f860;
+    private final Schema f870;
+    private final Schema f880;
+    private final Schema f890;
+    private final Schema f900;
+    private final Schema f910;
+    private final Schema f920;
+    private final Schema f930;
+    private final Schema f940;
+    private final Schema f950;
+    private final Schema f960;
+    private final Schema f970;
+    private final Schema f980;
+    private final Schema f990;
+    private final Schema f1000;
+    private final Schema f1010;
+    private final Schema f1020;
+    private final Schema f1030;
+    private final Schema f1040;
+    private final Schema f1050;
+    private final Schema f1060;
+    private final Schema f1070;
+    private final Schema f1080;
+    private final Schema f1090;
+    private final Schema f1100;
+    private final Schema f1110;
+    private final Schema f1120;
+    private final Schema f1130;
+    private final Schema f1140;
+    private final Schema f1150;
+    private final Schema f1160;
+    private final Schema f1170;
+    private final Schema f1180;
+    private final Schema f1190;
+    private final Schema f1200;
+    private final Schema f1210;
+    private final Schema f1220;
+    private final Schema f1230;
+    private final Schema f1240;
+    private final Schema f1250;
+    private final Schema f1260;
+    private final Schema f1270;
+    private final Schema f1280;
+    private final Schema f1290;
+    private final Schema f1300;
+    private final Schema f1310;
+    private final Schema f1320;
+    private final Schema f1330;
+    private final Schema f1340;
+    private final Schema f1350;
+    private final Schema f1360;
+    private final Schema f1370;
+    private final Schema f1380;
+    private final Schema f1390;
+    private final Schema f1400;
+    private final Schema f1410;
+    private final Schema f1420;
+    private final Schema f1430;
+    private final Schema f1440;
+    private final Schema f1450;
+    private final Schema f1460;
+    private final Schema f1470;
+    private final Schema f1480;
+    private final Schema f1490;
+    private final Schema f1500;
+    private final Schema f1510;
+    private final Schema f1520;
+    private final Schema f1530;
+    private final Schema f1540;
+    private final Schema f1550;
+    private final Schema f1560;
+    private final Schema f1570;
+    private final Schema f1580;
+    private final Schema f1590;
+    private final Schema f1600;
+    private final Schema f1610;
+    private final Schema f1620;
+    private final Schema f1630;
+    private final Schema f1640;
+    private final Schema f1650;
+    private final Schema f1660;
+    private final Schema f1670;
+    private final Schema f1680;
+    private final Schema f1690;
+    private final Schema f1700;
+    private final Schema f1710;
+    private final Schema f1720;
+    private final Schema f1730;
+    private final Schema f1740;
+    private final Schema f1750;
+    private final Schema f1760;
+    private final Schema f1770;
+    private final Schema f1780;
+    private final Schema f1790;
+    private final Schema f1800;
+    private final Schema f1810;
+    private final Schema f1820;
+    private final Schema f1830;
+    private final Schema f1840;
+    private final Schema f1850;
+    private final Schema f1860;
+    private final Schema f1870;
+    private final Schema f1880;
+    private final Schema f1890;
+    private final Schema f1900;
+    private final Schema f1910;
+    private final Schema f1920;
+    private final Schema f1930;
+    private final Schema f1940;
+    private final Schema f1950;
+    private final Schema f1960;
+    private final Schema f1970;
+    private final Schema f1980;
+    private final Schema f1990;
+    private final Schema f2000;
+    private final Schema f2010;
+    private final Schema f2020;
+    private final Schema f2030;
+    private final Schema f2040;
+    private final Schema f2050;
+    private final Schema f2060;
+    private final Schema f2070;
+    private final Schema f2080;
+    private final Schema f2090;
+    private final Schema f2100;
+    private final Schema f2110;
+    private final Schema f2120;
+    private final Schema f2130;
+    private final Schema f2140;
+    private final Schema f2150;
+    private final Schema f2160;
+    private final Schema f2170;
+    private final Schema f2180;
+    private final Schema f2190;
+    private final Schema f2200;
+    private final Schema f2210;
+    private final Schema f2220;
+    private final Schema f2230;
+    private final Schema f2240;
+    private final Schema f2250;
+    private final Schema f2260;
+    private final Schema f2270;
+    private final Schema f2280;
+    private final Schema f2290;
+    private final Schema f2300;
+    private final Schema f2310;
+    private final Schema f2320;
+    private final Schema f2330;
+    private final Schema f2340;
+    private final Schema f2350;
+    private final Schema f2360;
+    private final Schema f2370;
+    private final Schema f2380;
+    private final Schema f2390;
+    private final Schema f2400;
+    private final Schema f2410;
+    private final Schema f2420;
+    private final Schema f2430;
+    private final Schema f2440;
+    private final Schema f2450;
+    private final Schema f2460;
+    private final Schema f2470;
+    private final Schema f2480;
+    private final Schema f2490;
+    private final Schema f2500;
+    private final Schema f2510;
+    private final Schema f2520;
+    private final Schema f2530;
+    private final Schema f2540;
+    private final Schema f2550;
+    private final Schema f2560;
+    private final Schema f2570;
+    private final Schema f2580;
+    private final Schema f2590;
+    private final Schema f2600;
+    private final Schema f2610;
+    private final Schema f2620;
+    private final Schema f2630;
+    private final Schema f2640;
+    private final Schema f2650;
+    private final Schema f2660;
+    private final Schema f2670;
+    private final Schema f2680;
+    private final Schema f2690;
+    private final Schema f2700;
+    private final Schema f2710;
+    private final Schema f2720;
+    private final Schema f2730;
+    private final Schema f2740;
+    private final Schema f2750;
+    private final Schema f2760;
+    private final Schema f2770;
+    private final Schema f2780;
+    private final Schema f2790;
+    private final Schema f2800;
+    private final Schema f2810;
+    private final Schema f2820;
+    private final Schema f2830;
+    private final Schema f2840;
+    private final Schema f2850;
+    private final Schema f2860;
+    private final Schema f2870;
+    private final Schema f2880;
+    private final Schema f2890;
+    private final Schema f2900;
+    private final Schema f2910;
+    private final Schema f2920;
+    private final Schema f2930;
+    private final Schema f2940;
+    private final Schema f2950;
+    private final Schema f2960;
+    private final Schema f2970;
+    private final Schema f2980;
+    private final Schema f2990;
+    private final Schema f3000;
+    private final Schema f3010;
+    private final Schema f3020;
+    private final Schema f3030;
+    private final Schema f3040;
+    private final Schema f3050;
+    private final Schema f3060;
+    private final Schema f3070;
+    private final Schema f3080;
+    private final Schema f3090;
+    private final Schema f3100;
+    private final Schema f3110;
+    private final Schema f3120;
+    private final Schema f3130;
+    private final Schema f3140;
+    private final Schema f3150;
+    private final Schema f3160;
+    private final Schema f3170;
+    private final Schema f3180;
+    private final Schema f3190;
+    private final Schema f3200;
+    private final Schema f3210;
+    private final Schema f3220;
+    private final Schema f3230;
+    private final Schema f3240;
+    private final Schema f3250;
+    private final Schema f3260;
+    private final Schema f3270;
+    private final Schema f3280;
+    private final Schema f3290;
+    private final Schema f3300;
+    private final Schema f3310;
+    private final Schema f3320;
+    private final Schema f3330;
+    private final Schema f3340;
+    private final Schema f3350;
+    private final Schema f3360;
+    private final Schema f3370;
+    private final Schema f3380;
+    private final Schema f3390;
+    private final Schema f3400;
+    private final Schema f3410;
+    private final Schema f3420;
+    private final Schema f3430;
+    private final Schema f3440;
+    private final Schema f3450;
+    private final Schema f3460;
+    private final Schema f3470;
+    private final Schema f3480;
+    private final Schema f3490;
+    private final Schema f3500;
+    private final Schema f3510;
+    private final Schema f3520;
+    private final Schema f3530;
+    private final Schema f3540;
+    private final Schema f3550;
+    private final Schema f3560;
+    private final Schema f3570;
+    private final Schema f3580;
+    private final Schema f3590;
+    private final Schema f3600;
+    private final Schema f3610;
+    private final Schema f3620;
+    private final Schema f3630;
+    private final Schema f3640;
+    private final Schema f3650;
+    private final Schema f3660;
+    private final Schema f3670;
+    private final Schema f3680;
+    private final Schema f3690;
+    private final Schema f3700;
+    private final Schema f3710;
+    private final Schema f3720;
+    private final Schema f3730;
+    private final Schema f3740;
+    private final Schema f3750;
+    private final Schema f3760;
+    private final Schema f3770;
+    private final Schema f3780;
+    private final Schema f3790;
+    private final Schema f3800;
+    private final Schema f3810;
+    private final Schema f3820;
+    private final Schema f3830;
+    private final Schema f3840;
+    private final Schema f3850;
+    private final Schema f3860;
+    private final Schema f3870;
+    private final Schema f3880;
+    private final Schema f3890;
+    private final Schema f3900;
+    private final Schema f3910;
+    private final Schema f3920;
+    private final Schema f3930;
+    private final Schema f3940;
+    private final Schema f3950;
+    private final Schema f3960;
+    private final Schema f3970;
+    private final Schema f3980;
+    private final Schema f3990;
+    private final Schema f4000;
+    private final Schema f4010;
+    private final Schema f4020;
+    private final Schema f4030;
+    private final Schema f4040;
+    private final Schema f4050;
+    private final Schema f4060;
+    private final Schema f4070;
+    private final Schema f4080;
+    private final Schema f4090;
+    private final Schema f4100;
+    private final Schema f4110;
+    private final Schema f4120;
+    private final Schema f4130;
+    private final Schema f4140;
+    private final Schema f4150;
+    private final Schema f4160;
+    private final Schema f4170;
+    private final Schema f4180;
+    private final Schema f4190;
+    private final Schema f4200;
+    private final Schema f4210;
+    private final Schema f4220;
+    private final Schema f4230;
+    private final Schema f4240;
+    private final Schema f4250;
+    private final Schema f4260;
+    private final Schema f4270;
+    private final Schema f4280;
+    private final Schema f4290;
+    private final Schema f4300;
+    private final Schema f4310;
+    private final Schema f4320;
+    private final Schema f4330;
+    private final Schema f4340;
+    private final Schema f4350;
+    private final Schema f4360;
+    private final Schema f4370;
+    private final Schema f4380;
+    private final Schema f4390;
+    private final Schema f4400;
+    private final Schema f4410;
+    private final Schema f4420;
+    private final Schema f4430;
+    private final Schema f4440;
+    private final Schema f4450;
+    private final Schema f4460;
+    private final Schema f4470;
+    private final Schema f4480;
+    private final Schema f4490;
+    private final Schema f4500;
+    private final Schema f4510;
+    private final Schema f4520;
+    private final Schema f4530;
+    private final Schema f4540;
+    private final Schema f4550;
+    private final Schema f4560;
+    private final Schema f4570;
+    private final Schema f4580;
+    private final Schema f4590;
+    private final Schema f4600;
+    private final Schema f4610;
+    private final Schema f4620;
+    private final Schema f4630;
+    private final Schema f4640;
+    private final Schema f4650;
+    private final Schema f4660;
+    private final Schema f4670;
+    private final Schema f4680;
+    private final Schema f4690;
+    private final Schema f4700;
+    private final Schema f4710;
+    private final Schema f4720;
+    private final Schema f4730;
+    private final Schema f4740;
+    private final Schema f4750;
+    private final Schema f4760;
+    private final Schema f4770;
+    private final Schema f4780;
+    private final Schema f4790;
+    private final Schema f4800;
+    private final Schema f4810;
+    private final Schema f4820;
+    private final Schema f4830;
+    private final Schema f4840;
+    private final Schema f4850;
+    private final Schema f4860;
+    private final Schema f4870;
+    private final Schema f4880;
+    private final Schema f4890;
+    private final Schema f4900;
+    private final Schema f4910;
+    private final Schema f4920;
+    private final Schema f4930;
+    private final Schema f4940;
+    private final Schema f4950;
+    private final Schema f4960;
+    private final Schema f4970;
+    private final Schema f4980;
+    private final Schema f4990;
+    private final Schema f5000;
+    private final Schema f5010;
+    private final Schema f5020;
+    private final Schema f5030;
+    private final Schema f5040;
+    private final Schema f5050;
+    private final Schema f5060;
+    private final Schema f5070;
+    private final Schema f5080;
+    private final Schema f5090;
+    private final Schema f5100;
+    private final Schema f5110;
+    private final Schema f5120;
+    private final Schema f5130;
+    private final Schema f5140;
+    private final Schema f5150;
+    private final Schema f5160;
+    private final Schema f5170;
+    private final Schema f5180;
+    private final Schema f5190;
+    private final Schema f5200;
+    private final Schema f5210;
+    private final Schema f5220;
+    private final Schema f5230;
+    private final Schema f5240;
+    private final Schema f5250;
+    private final Schema f5260;
+    private final Schema f5270;
+    private final Schema f5280;
+    private final Schema f5290;
+    private final Schema f5300;
+    private final Schema f5310;
+    private final Schema f5320;
+    private final Schema f5330;
+    private final Schema f5340;
+    private final Schema f5350;
+    private final Schema f5360;
+    private final Schema f5370;
+    private final Schema f5380;
+    private final Schema f5390;
+    private final Schema f5400;
+    private final Schema f5410;
+    private final Schema f5420;
+    private final Schema f5430;
+    private final Schema f5440;
+    private final Schema f5450;
+    private final Schema f5460;
+    private final Schema f5470;
+    private final Schema f5480;
+    private final Schema f5490;
+    private final Schema f5500;
+    private final Schema f5510;
+    private final Schema f5520;
+    private final Schema f5530;
+    private final Schema f5540;
+    private final Schema f5550;
+    private final Schema f5560;
+    private final Schema f5570;
+    private final Schema f5580;
+    private final Schema f5590;
+    private final Schema f5600;
+    private final Schema f5610;
+    private final Schema f5620;
+    private final Schema f5630;
+    private final Schema f5640;
+    private final Schema f5650;
+    private final Schema f5660;
+    private final Schema f5670;
+    private final Schema f5680;
+    private final Schema f5690;
+    private final Schema f5700;
+    private final Schema f5710;
+    private final Schema f5720;
+    private final Schema f5730;
+    private final Schema f5740;
+    private final Schema f5750;
+    private final Schema f5760;
+    private final Schema f5770;
+    private final Schema f5780;
+    private final Schema f5790;
+    private final Schema f5800;
+    private final Schema f5810;
+    private final Schema f5820;
+    private final Schema f5830;
+    private final Schema f5840;
+    private final Schema f5850;
+    private final Schema f5860;
+    private final Schema f5870;
+    private final Schema f5880;
+    private final Schema f5890;
+    private final Schema f5900;
+    private final Schema f5910;
+    private final Schema f5920;
+    private final Schema f5930;
+    private final Schema f5940;
+    private final Schema f5950;
+    private final Schema f5960;
+    private final Schema f5970;
+    private final Schema f5980;
+    private final Schema f5990;
+    private final Schema f6000;
+    private final Schema f6010;
+    private final Schema f6020;
+    private final Schema f6030;
+    private final Schema f6040;
+    private final Schema f6050;
+    private final Schema f6060;
+    private final Schema f6070;
+    private final Schema f6080;
+    private final Schema f6090;
+    private final Schema f6100;
+    private final Schema f6110;
+    private final Schema f6120;
+    private final Schema f6130;
+    private final Schema f6140;
+    private final Schema f6150;
+    private final Schema f6160;
+    private final Schema f6170;
+    private final Schema f6180;
+    private final Schema f6190;
+    private final Schema f6200;
+    private final Schema f6210;
+    private final Schema f6220;
+    private final Schema f6230;
+    private final Schema f6240;
+    private final Schema f6250;
+    private final Schema f6260;
+    private final Schema f6270;
+    private final Schema f6280;
+    private final Schema f6290;
+    private final Schema f6300;
+    private final Schema f6310;
+    private final Schema f6320;
+    private final Schema f6330;
+    private final Schema f6340;
+    private final Schema f6350;
+    private final Schema f6360;
+    private final Schema f6370;
+    private final Schema f6380;
+    private final Schema f6390;
+    private final Schema f6400;
+    private final Schema f6410;
+    private final Schema f6420;
+    private final Schema f6430;
+    private final Schema f6440;
+    private final Schema f6450;
+    private final Schema f6460;
+    private final Schema f6470;
+    private final Schema f6480;
+    private final Schema f6490;
+    private final Schema f6500;
+    private final Schema f6510;
+    private final Schema f6520;
+    private final Schema f6530;
+    private final Schema f6540;
+    private final Schema f6550;
+    private final Schema f6560;
+    private final Schema f6570;
+    private final Schema f6580;
+    private final Schema f6590;
+    private final Schema f6600;
+    private final Schema f6610;
+    private final Schema f6620;
+    private final Schema f6630;
+    private final Schema f6640;
+    private final Schema f6650;
+    private final Schema f6660;
+    private final Schema f6670;
+    private final Schema f6680;
+    private final Schema f6690;
+    private final Schema f6700;
+    private final Schema f6710;
+    private final Schema f6720;
+    private final Schema f6730;
+    private final Schema f6740;
+    private final Schema f6750;
+    private final Schema f6760;
+    private final Schema f6770;
+    private final Schema f6780;
+    private final Schema f6790;
+    private final Schema f6800;
+    private final Schema f6810;
+    private final Schema f6820;
+    private final Schema f6830;
+    private final Schema f6840;
+    private final Schema f6850;
+    private final Schema f6860;
+    private final Schema f6870;
+    private final Schema f6880;
+    private final Schema f6890;
+    private final Schema f6900;
+    private final Schema f6910;
+    private final Schema f6920;
+    private final Schema f6930;
+    private final Schema f6940;
+    private final Schema f6950;
+    private final Schema f6960;
+    private final Schema f6970;
+    private final Schema f6980;
+    private final Schema f6990;
+    private final Schema f7000;
+    private final Schema f7010;
+    private final Schema f7020;
+    private final Schema f7030;
+    private final Schema f7040;
+    private final Schema f7050;
+    private final Schema f7060;
+    private final Schema f7070;
+    private final Schema f7080;
+    private final Schema f7090;
+    private final Schema f7100;
+    private final Schema f7110;
+    private final Schema f7120;
+    private final Schema f7130;
+    private final Schema f7140;
+    private final Schema f7150;
+    private final Schema f7160;
+    private final Schema f7170;
+    private final Schema f7180;
+    private final Schema f7190;
+    private final Schema f7200;
+    private final Schema f7210;
+    private final Schema f7220;
+    private final Schema f7230;
+    private final Schema f7240;
+    private final Schema f7250;
+    private final Schema f7260;
+    private final Schema f7270;
+    private final Schema f7280;
+    private final Schema f7290;
+    private final Schema f7300;
+    private final Schema f7310;
+    private final Schema f7320;
+    private final Schema f7330;
+    private final Schema f7340;
+    private final Schema f7350;
+    private final Schema f7360;
+    private final Schema f7370;
+    private final Schema f7380;
+    private final Schema f7390;
+    private final Schema f7400;
+    private final Schema f7410;
+    private final Schema f7420;
+    private final Schema f7430;
+    private final Schema f7440;
+    private final Schema f7450;
+    private final Schema f7460;
+    private final Schema f7470;
+    private final Schema f7480;
+    private final Schema f7490;
+    private final Schema f7500;
+    private final Schema f7510;
+    private final Schema f7520;
+    private final Schema f7530;
+    private final Schema f7540;
+    private final Schema f7550;
+    private final Schema f7560;
+    private final Schema f7570;
+    private final Schema f7580;
+    private final Schema f7590;
+    private final Schema f7600;
+    private final Schema f7610;
+    private final Schema f7620;
+    private final Schema f7630;
+    private final Schema f7640;
+    private final Schema f7650;
+    private final Schema f7660;
+    private final Schema f7670;
+    private final Schema f7680;
+    private final Schema f7690;
+    private final Schema f7700;
+    private final Schema f7710;
+    private final Schema f7720;
+    private final Schema f7730;
+    private final Schema f7740;
+    private final Schema f7750;
+    private final Schema f7760;
+    private final Schema f7770;
+    private final Schema f7780;
+    private final Schema f7790;
+    private final Schema f7800;
+    private final Schema f7810;
+    private final Schema f7820;
+    private final Schema f7830;
+    private final Schema f7840;
+    private final Schema f7850;
+    private final Schema f7860;
+    private final Schema f7870;
+    private final Schema f7880;
+    private final Schema f7890;
+    private final Schema f7900;
+    private final Schema f7910;
+    private final Schema f7920;
+    private final Schema f7930;
+    private final Schema f7940;
+    private final Schema f7950;
+    private final Schema f7960;
+    private final Schema f7970;
+    private final Schema f7980;
+    private final Schema f7990;
+    private final Schema f8000;
+    private final Schema f8010;
+    private final Schema f8020;
+    private final Schema f8030;
+    private final Schema f8040;
+    private final Schema f8050;
+    private final Schema f8060;
+    private final Schema f8070;
+    private final Schema f8080;
+    private final Schema f8090;
+    private final Schema f8100;
+    private final Schema f8110;
+    private final Schema f8120;
+    private final Schema f8130;
+    private final Schema f8140;
+    private final Schema f8150;
+    private final Schema f8160;
+    private final Schema f8170;
+    private final Schema f8180;
+    private final Schema f8190;
+    private final Schema f8200;
+    private final Schema f8210;
+    private final Schema f8220;
+    private final Schema f8230;
+    private final Schema f8240;
+    private final Schema f8250;
+    private final Schema f8260;
+    private final Schema f8270;
+    private final Schema f8280;
+    private final Schema f8290;
+    private final Schema f8300;
+    private final Schema f8310;
+    private final Schema f8320;
+    private final Schema f8330;
+    private final Schema f8340;
+    private final Schema f8350;
+    private final Schema f8360;
+    private final Schema f8370;
+    private final Schema f8380;
+    private final Schema f8390;
+    private final Schema f8400;
+    private final Schema f8410;
+    private final Schema f8420;
+    private final Schema f8430;
+    private final Schema f8440;
+    private final Schema f8450;
+    private final Schema f8460;
+    private final Schema f8470;
+    private final Schema f8480;
+    private final Schema f8490;
+    private final Schema f8500;
+    private final Schema f8510;
+    private final Schema f8520;
+    private final Schema f8530;
+    private final Schema f8540;
+    private final Schema f8550;
+    private final Schema f8560;
+    private final Schema f8570;
+    private final Schema f8580;
+    private final Schema f8590;
+    private final Schema f8600;
+    private final Schema f8610;
+    private final Schema f8620;
+    private final Schema f8630;
+    private final Schema f8640;
+    private final Schema f8650;
+    private final Schema f8660;
+    private final Schema f8670;
+    private final Schema f8680;
+    private final Schema f8690;
+    private final Schema f8700;
+    private final Schema f8710;
+    private final Schema f8720;
+    private final Schema f8730;
+    private final Schema f8740;
+    private final Schema f8750;
+    private final Schema f8760;
+    private final Schema f8770;
+    private final Schema f8780;
+    private final Schema f8790;
+    private final Schema f8800;
+    private final Schema f8810;
+    private final Schema f8820;
+    private final Schema f8830;
+    private final Schema f8840;
+    private final Schema f8850;
+    private final Schema f8860;
+    private final Schema f8870;
+    private final Schema f8880;
+    private final Schema f8890;
+    private final Schema f8900;
+    private final Schema f8910;
+    private final Schema f8920;
+    private final Schema f8930;
+    private final Schema f8940;
+    private final Schema f8950;
+    private final Schema f8960;
+    private final Schema f8970;
+    private final Schema f8980;
+    private final Schema f8990;
+    private final Schema f9000;
+    private final Schema f9010;
+    private final Schema f9020;
+    private final Schema f9030;
+    private final Schema f9040;
+    private final Schema f9050;
+    private final Schema f9060;
+    private final Schema f9070;
+    private final Schema f9080;
+    private final Schema f9090;
+    private final Schema f9100;
+    private final Schema f9110;
+    private final Schema f9120;
+    private final Schema f9130;
+    private final Schema f9140;
+    private final Schema f9150;
+    private final Schema f9160;
+    private final Schema f9170;
+    private final Schema f9180;
+    private final Schema f9190;
+    private final Schema f9200;
+    private final Schema f9210;
+    private final Schema f9220;
+    private final Schema f9230;
+    private final Schema f9240;
+    private final Schema f9250;
+    private final Schema f9260;
+    private final Schema f9270;
+    private final Schema f9280;
+    private final Schema f9290;
+    private final Schema f9300;
+    private final Schema f9310;
+    private final Schema f9320;
+    private final Schema f9330;
+    private final Schema f9340;
+    private final Schema f9350;
+    private final Schema f9360;
+    private final Schema f9370;
+    private final Schema f9380;
+    private final Schema f9390;
+    private final Schema f9400;
+    private final Schema f9410;
+    private final Schema f9420;
+    private final Schema f9430;
+    private final Schema f9440;
+    private final Schema f9450;
+    private final Schema f9460;
+    private final Schema f9470;
+    private final Schema f9480;
+    private final Schema f9490;
+    private final Schema f9500;
+    private final Schema f9510;
+    private final Schema f9520;
+    private final Schema f9530;
+    private final Schema f9540;
+    private final Schema f9550;
+    private final Schema f9560;
+    private final Schema f9570;
+    private final Schema f9580;
+    private final Schema f9590;
+    private final Schema f9600;
+    private final Schema f9610;
+    private final Schema f9620;
+    private final Schema f9630;
+    private final Schema f9640;
+    private final Schema f9650;
+    private final Schema f9660;
+    private final Schema f9670;
+    private final Schema f9680;
+    private final Schema f9690;
+    private final Schema f9700;
+    private final Schema f9710;
+    private final Schema f9720;
+    private final Schema f9730;
+    private final Schema f9740;
+    private final Schema f9750;
+    private final Schema f9760;
+    private final Schema f9770;
+    private final Schema f9780;
+    private final Schema f9790;
+    private final Schema f9800;
+    private final Schema f9810;
+    private final Schema f9820;
+    private final Schema f9830;
+    private final Schema f9840;
+    private final Schema f9850;
+    private final Schema f9860;
+    private final Schema f9870;
+    private final Schema f9880;
+    private final Schema f9890;
+    private final Schema f9900;
+    private final Schema f9910;
+    private final Schema f9920;
+    private final Schema f9930;
+    private final Schema f9940;
+    private final Schema f9950;
+    private final Schema f9960;
+    private final Schema f9970;
+    private final Schema f9980;
+    private final Schema f9990;
+
+    public FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.f00 = readerSchema.getField("F0").schema();
+        this.f10 = readerSchema.getField("F1").schema();
+        this.f20 = readerSchema.getField("F2").schema();
+        this.f30 = readerSchema.getField("F3").schema();
+        this.f40 = readerSchema.getField("F4").schema();
+        this.f50 = readerSchema.getField("F5").schema();
+        this.f60 = readerSchema.getField("F6").schema();
+        this.f70 = readerSchema.getField("F7").schema();
+        this.f80 = readerSchema.getField("F8").schema();
+        this.f90 = readerSchema.getField("F9").schema();
+        this.f100 = readerSchema.getField("F10").schema();
+        this.f110 = readerSchema.getField("F11").schema();
+        this.f120 = readerSchema.getField("F12").schema();
+        this.f130 = readerSchema.getField("F13").schema();
+        this.f140 = readerSchema.getField("F14").schema();
+        this.f150 = readerSchema.getField("F15").schema();
+        this.f160 = readerSchema.getField("F16").schema();
+        this.f170 = readerSchema.getField("F17").schema();
+        this.f180 = readerSchema.getField("F18").schema();
+        this.f190 = readerSchema.getField("F19").schema();
+        this.f200 = readerSchema.getField("F20").schema();
+        this.f210 = readerSchema.getField("F21").schema();
+        this.f220 = readerSchema.getField("F22").schema();
+        this.f230 = readerSchema.getField("F23").schema();
+        this.f240 = readerSchema.getField("F24").schema();
+        this.f250 = readerSchema.getField("F25").schema();
+        this.f260 = readerSchema.getField("F26").schema();
+        this.f270 = readerSchema.getField("F27").schema();
+        this.f280 = readerSchema.getField("F28").schema();
+        this.f290 = readerSchema.getField("F29").schema();
+        this.f300 = readerSchema.getField("F30").schema();
+        this.f310 = readerSchema.getField("F31").schema();
+        this.f320 = readerSchema.getField("F32").schema();
+        this.f330 = readerSchema.getField("F33").schema();
+        this.f340 = readerSchema.getField("F34").schema();
+        this.f350 = readerSchema.getField("F35").schema();
+        this.f360 = readerSchema.getField("F36").schema();
+        this.f370 = readerSchema.getField("F37").schema();
+        this.f380 = readerSchema.getField("F38").schema();
+        this.f390 = readerSchema.getField("F39").schema();
+        this.f400 = readerSchema.getField("F40").schema();
+        this.f410 = readerSchema.getField("F41").schema();
+        this.f420 = readerSchema.getField("F42").schema();
+        this.f430 = readerSchema.getField("F43").schema();
+        this.f440 = readerSchema.getField("F44").schema();
+        this.f450 = readerSchema.getField("F45").schema();
+        this.f460 = readerSchema.getField("F46").schema();
+        this.f470 = readerSchema.getField("F47").schema();
+        this.f480 = readerSchema.getField("F48").schema();
+        this.f490 = readerSchema.getField("F49").schema();
+        this.f500 = readerSchema.getField("F50").schema();
+        this.f510 = readerSchema.getField("F51").schema();
+        this.f520 = readerSchema.getField("F52").schema();
+        this.f530 = readerSchema.getField("F53").schema();
+        this.f540 = readerSchema.getField("F54").schema();
+        this.f550 = readerSchema.getField("F55").schema();
+        this.f560 = readerSchema.getField("F56").schema();
+        this.f570 = readerSchema.getField("F57").schema();
+        this.f580 = readerSchema.getField("F58").schema();
+        this.f590 = readerSchema.getField("F59").schema();
+        this.f600 = readerSchema.getField("F60").schema();
+        this.f610 = readerSchema.getField("F61").schema();
+        this.f620 = readerSchema.getField("F62").schema();
+        this.f630 = readerSchema.getField("F63").schema();
+        this.f640 = readerSchema.getField("F64").schema();
+        this.f650 = readerSchema.getField("F65").schema();
+        this.f660 = readerSchema.getField("F66").schema();
+        this.f670 = readerSchema.getField("F67").schema();
+        this.f680 = readerSchema.getField("F68").schema();
+        this.f690 = readerSchema.getField("F69").schema();
+        this.f700 = readerSchema.getField("F70").schema();
+        this.f710 = readerSchema.getField("F71").schema();
+        this.f720 = readerSchema.getField("F72").schema();
+        this.f730 = readerSchema.getField("F73").schema();
+        this.f740 = readerSchema.getField("F74").schema();
+        this.f750 = readerSchema.getField("F75").schema();
+        this.f760 = readerSchema.getField("F76").schema();
+        this.f770 = readerSchema.getField("F77").schema();
+        this.f780 = readerSchema.getField("F78").schema();
+        this.f790 = readerSchema.getField("F79").schema();
+        this.f800 = readerSchema.getField("F80").schema();
+        this.f810 = readerSchema.getField("F81").schema();
+        this.f820 = readerSchema.getField("F82").schema();
+        this.f830 = readerSchema.getField("F83").schema();
+        this.f840 = readerSchema.getField("F84").schema();
+        this.f850 = readerSchema.getField("F85").schema();
+        this.f860 = readerSchema.getField("F86").schema();
+        this.f870 = readerSchema.getField("F87").schema();
+        this.f880 = readerSchema.getField("F88").schema();
+        this.f890 = readerSchema.getField("F89").schema();
+        this.f900 = readerSchema.getField("F90").schema();
+        this.f910 = readerSchema.getField("F91").schema();
+        this.f920 = readerSchema.getField("F92").schema();
+        this.f930 = readerSchema.getField("F93").schema();
+        this.f940 = readerSchema.getField("F94").schema();
+        this.f950 = readerSchema.getField("F95").schema();
+        this.f960 = readerSchema.getField("F96").schema();
+        this.f970 = readerSchema.getField("F97").schema();
+        this.f980 = readerSchema.getField("F98").schema();
+        this.f990 = readerSchema.getField("F99").schema();
+        this.f1000 = readerSchema.getField("F100").schema();
+        this.f1010 = readerSchema.getField("F101").schema();
+        this.f1020 = readerSchema.getField("F102").schema();
+        this.f1030 = readerSchema.getField("F103").schema();
+        this.f1040 = readerSchema.getField("F104").schema();
+        this.f1050 = readerSchema.getField("F105").schema();
+        this.f1060 = readerSchema.getField("F106").schema();
+        this.f1070 = readerSchema.getField("F107").schema();
+        this.f1080 = readerSchema.getField("F108").schema();
+        this.f1090 = readerSchema.getField("F109").schema();
+        this.f1100 = readerSchema.getField("F110").schema();
+        this.f1110 = readerSchema.getField("F111").schema();
+        this.f1120 = readerSchema.getField("F112").schema();
+        this.f1130 = readerSchema.getField("F113").schema();
+        this.f1140 = readerSchema.getField("F114").schema();
+        this.f1150 = readerSchema.getField("F115").schema();
+        this.f1160 = readerSchema.getField("F116").schema();
+        this.f1170 = readerSchema.getField("F117").schema();
+        this.f1180 = readerSchema.getField("F118").schema();
+        this.f1190 = readerSchema.getField("F119").schema();
+        this.f1200 = readerSchema.getField("F120").schema();
+        this.f1210 = readerSchema.getField("F121").schema();
+        this.f1220 = readerSchema.getField("F122").schema();
+        this.f1230 = readerSchema.getField("F123").schema();
+        this.f1240 = readerSchema.getField("F124").schema();
+        this.f1250 = readerSchema.getField("F125").schema();
+        this.f1260 = readerSchema.getField("F126").schema();
+        this.f1270 = readerSchema.getField("F127").schema();
+        this.f1280 = readerSchema.getField("F128").schema();
+        this.f1290 = readerSchema.getField("F129").schema();
+        this.f1300 = readerSchema.getField("F130").schema();
+        this.f1310 = readerSchema.getField("F131").schema();
+        this.f1320 = readerSchema.getField("F132").schema();
+        this.f1330 = readerSchema.getField("F133").schema();
+        this.f1340 = readerSchema.getField("F134").schema();
+        this.f1350 = readerSchema.getField("F135").schema();
+        this.f1360 = readerSchema.getField("F136").schema();
+        this.f1370 = readerSchema.getField("F137").schema();
+        this.f1380 = readerSchema.getField("F138").schema();
+        this.f1390 = readerSchema.getField("F139").schema();
+        this.f1400 = readerSchema.getField("F140").schema();
+        this.f1410 = readerSchema.getField("F141").schema();
+        this.f1420 = readerSchema.getField("F142").schema();
+        this.f1430 = readerSchema.getField("F143").schema();
+        this.f1440 = readerSchema.getField("F144").schema();
+        this.f1450 = readerSchema.getField("F145").schema();
+        this.f1460 = readerSchema.getField("F146").schema();
+        this.f1470 = readerSchema.getField("F147").schema();
+        this.f1480 = readerSchema.getField("F148").schema();
+        this.f1490 = readerSchema.getField("F149").schema();
+        this.f1500 = readerSchema.getField("F150").schema();
+        this.f1510 = readerSchema.getField("F151").schema();
+        this.f1520 = readerSchema.getField("F152").schema();
+        this.f1530 = readerSchema.getField("F153").schema();
+        this.f1540 = readerSchema.getField("F154").schema();
+        this.f1550 = readerSchema.getField("F155").schema();
+        this.f1560 = readerSchema.getField("F156").schema();
+        this.f1570 = readerSchema.getField("F157").schema();
+        this.f1580 = readerSchema.getField("F158").schema();
+        this.f1590 = readerSchema.getField("F159").schema();
+        this.f1600 = readerSchema.getField("F160").schema();
+        this.f1610 = readerSchema.getField("F161").schema();
+        this.f1620 = readerSchema.getField("F162").schema();
+        this.f1630 = readerSchema.getField("F163").schema();
+        this.f1640 = readerSchema.getField("F164").schema();
+        this.f1650 = readerSchema.getField("F165").schema();
+        this.f1660 = readerSchema.getField("F166").schema();
+        this.f1670 = readerSchema.getField("F167").schema();
+        this.f1680 = readerSchema.getField("F168").schema();
+        this.f1690 = readerSchema.getField("F169").schema();
+        this.f1700 = readerSchema.getField("F170").schema();
+        this.f1710 = readerSchema.getField("F171").schema();
+        this.f1720 = readerSchema.getField("F172").schema();
+        this.f1730 = readerSchema.getField("F173").schema();
+        this.f1740 = readerSchema.getField("F174").schema();
+        this.f1750 = readerSchema.getField("F175").schema();
+        this.f1760 = readerSchema.getField("F176").schema();
+        this.f1770 = readerSchema.getField("F177").schema();
+        this.f1780 = readerSchema.getField("F178").schema();
+        this.f1790 = readerSchema.getField("F179").schema();
+        this.f1800 = readerSchema.getField("F180").schema();
+        this.f1810 = readerSchema.getField("F181").schema();
+        this.f1820 = readerSchema.getField("F182").schema();
+        this.f1830 = readerSchema.getField("F183").schema();
+        this.f1840 = readerSchema.getField("F184").schema();
+        this.f1850 = readerSchema.getField("F185").schema();
+        this.f1860 = readerSchema.getField("F186").schema();
+        this.f1870 = readerSchema.getField("F187").schema();
+        this.f1880 = readerSchema.getField("F188").schema();
+        this.f1890 = readerSchema.getField("F189").schema();
+        this.f1900 = readerSchema.getField("F190").schema();
+        this.f1910 = readerSchema.getField("F191").schema();
+        this.f1920 = readerSchema.getField("F192").schema();
+        this.f1930 = readerSchema.getField("F193").schema();
+        this.f1940 = readerSchema.getField("F194").schema();
+        this.f1950 = readerSchema.getField("F195").schema();
+        this.f1960 = readerSchema.getField("F196").schema();
+        this.f1970 = readerSchema.getField("F197").schema();
+        this.f1980 = readerSchema.getField("F198").schema();
+        this.f1990 = readerSchema.getField("F199").schema();
+        this.f2000 = readerSchema.getField("F200").schema();
+        this.f2010 = readerSchema.getField("F201").schema();
+        this.f2020 = readerSchema.getField("F202").schema();
+        this.f2030 = readerSchema.getField("F203").schema();
+        this.f2040 = readerSchema.getField("F204").schema();
+        this.f2050 = readerSchema.getField("F205").schema();
+        this.f2060 = readerSchema.getField("F206").schema();
+        this.f2070 = readerSchema.getField("F207").schema();
+        this.f2080 = readerSchema.getField("F208").schema();
+        this.f2090 = readerSchema.getField("F209").schema();
+        this.f2100 = readerSchema.getField("F210").schema();
+        this.f2110 = readerSchema.getField("F211").schema();
+        this.f2120 = readerSchema.getField("F212").schema();
+        this.f2130 = readerSchema.getField("F213").schema();
+        this.f2140 = readerSchema.getField("F214").schema();
+        this.f2150 = readerSchema.getField("F215").schema();
+        this.f2160 = readerSchema.getField("F216").schema();
+        this.f2170 = readerSchema.getField("F217").schema();
+        this.f2180 = readerSchema.getField("F218").schema();
+        this.f2190 = readerSchema.getField("F219").schema();
+        this.f2200 = readerSchema.getField("F220").schema();
+        this.f2210 = readerSchema.getField("F221").schema();
+        this.f2220 = readerSchema.getField("F222").schema();
+        this.f2230 = readerSchema.getField("F223").schema();
+        this.f2240 = readerSchema.getField("F224").schema();
+        this.f2250 = readerSchema.getField("F225").schema();
+        this.f2260 = readerSchema.getField("F226").schema();
+        this.f2270 = readerSchema.getField("F227").schema();
+        this.f2280 = readerSchema.getField("F228").schema();
+        this.f2290 = readerSchema.getField("F229").schema();
+        this.f2300 = readerSchema.getField("F230").schema();
+        this.f2310 = readerSchema.getField("F231").schema();
+        this.f2320 = readerSchema.getField("F232").schema();
+        this.f2330 = readerSchema.getField("F233").schema();
+        this.f2340 = readerSchema.getField("F234").schema();
+        this.f2350 = readerSchema.getField("F235").schema();
+        this.f2360 = readerSchema.getField("F236").schema();
+        this.f2370 = readerSchema.getField("F237").schema();
+        this.f2380 = readerSchema.getField("F238").schema();
+        this.f2390 = readerSchema.getField("F239").schema();
+        this.f2400 = readerSchema.getField("F240").schema();
+        this.f2410 = readerSchema.getField("F241").schema();
+        this.f2420 = readerSchema.getField("F242").schema();
+        this.f2430 = readerSchema.getField("F243").schema();
+        this.f2440 = readerSchema.getField("F244").schema();
+        this.f2450 = readerSchema.getField("F245").schema();
+        this.f2460 = readerSchema.getField("F246").schema();
+        this.f2470 = readerSchema.getField("F247").schema();
+        this.f2480 = readerSchema.getField("F248").schema();
+        this.f2490 = readerSchema.getField("F249").schema();
+        this.f2500 = readerSchema.getField("F250").schema();
+        this.f2510 = readerSchema.getField("F251").schema();
+        this.f2520 = readerSchema.getField("F252").schema();
+        this.f2530 = readerSchema.getField("F253").schema();
+        this.f2540 = readerSchema.getField("F254").schema();
+        this.f2550 = readerSchema.getField("F255").schema();
+        this.f2560 = readerSchema.getField("F256").schema();
+        this.f2570 = readerSchema.getField("F257").schema();
+        this.f2580 = readerSchema.getField("F258").schema();
+        this.f2590 = readerSchema.getField("F259").schema();
+        this.f2600 = readerSchema.getField("F260").schema();
+        this.f2610 = readerSchema.getField("F261").schema();
+        this.f2620 = readerSchema.getField("F262").schema();
+        this.f2630 = readerSchema.getField("F263").schema();
+        this.f2640 = readerSchema.getField("F264").schema();
+        this.f2650 = readerSchema.getField("F265").schema();
+        this.f2660 = readerSchema.getField("F266").schema();
+        this.f2670 = readerSchema.getField("F267").schema();
+        this.f2680 = readerSchema.getField("F268").schema();
+        this.f2690 = readerSchema.getField("F269").schema();
+        this.f2700 = readerSchema.getField("F270").schema();
+        this.f2710 = readerSchema.getField("F271").schema();
+        this.f2720 = readerSchema.getField("F272").schema();
+        this.f2730 = readerSchema.getField("F273").schema();
+        this.f2740 = readerSchema.getField("F274").schema();
+        this.f2750 = readerSchema.getField("F275").schema();
+        this.f2760 = readerSchema.getField("F276").schema();
+        this.f2770 = readerSchema.getField("F277").schema();
+        this.f2780 = readerSchema.getField("F278").schema();
+        this.f2790 = readerSchema.getField("F279").schema();
+        this.f2800 = readerSchema.getField("F280").schema();
+        this.f2810 = readerSchema.getField("F281").schema();
+        this.f2820 = readerSchema.getField("F282").schema();
+        this.f2830 = readerSchema.getField("F283").schema();
+        this.f2840 = readerSchema.getField("F284").schema();
+        this.f2850 = readerSchema.getField("F285").schema();
+        this.f2860 = readerSchema.getField("F286").schema();
+        this.f2870 = readerSchema.getField("F287").schema();
+        this.f2880 = readerSchema.getField("F288").schema();
+        this.f2890 = readerSchema.getField("F289").schema();
+        this.f2900 = readerSchema.getField("F290").schema();
+        this.f2910 = readerSchema.getField("F291").schema();
+        this.f2920 = readerSchema.getField("F292").schema();
+        this.f2930 = readerSchema.getField("F293").schema();
+        this.f2940 = readerSchema.getField("F294").schema();
+        this.f2950 = readerSchema.getField("F295").schema();
+        this.f2960 = readerSchema.getField("F296").schema();
+        this.f2970 = readerSchema.getField("F297").schema();
+        this.f2980 = readerSchema.getField("F298").schema();
+        this.f2990 = readerSchema.getField("F299").schema();
+        this.f3000 = readerSchema.getField("F300").schema();
+        this.f3010 = readerSchema.getField("F301").schema();
+        this.f3020 = readerSchema.getField("F302").schema();
+        this.f3030 = readerSchema.getField("F303").schema();
+        this.f3040 = readerSchema.getField("F304").schema();
+        this.f3050 = readerSchema.getField("F305").schema();
+        this.f3060 = readerSchema.getField("F306").schema();
+        this.f3070 = readerSchema.getField("F307").schema();
+        this.f3080 = readerSchema.getField("F308").schema();
+        this.f3090 = readerSchema.getField("F309").schema();
+        this.f3100 = readerSchema.getField("F310").schema();
+        this.f3110 = readerSchema.getField("F311").schema();
+        this.f3120 = readerSchema.getField("F312").schema();
+        this.f3130 = readerSchema.getField("F313").schema();
+        this.f3140 = readerSchema.getField("F314").schema();
+        this.f3150 = readerSchema.getField("F315").schema();
+        this.f3160 = readerSchema.getField("F316").schema();
+        this.f3170 = readerSchema.getField("F317").schema();
+        this.f3180 = readerSchema.getField("F318").schema();
+        this.f3190 = readerSchema.getField("F319").schema();
+        this.f3200 = readerSchema.getField("F320").schema();
+        this.f3210 = readerSchema.getField("F321").schema();
+        this.f3220 = readerSchema.getField("F322").schema();
+        this.f3230 = readerSchema.getField("F323").schema();
+        this.f3240 = readerSchema.getField("F324").schema();
+        this.f3250 = readerSchema.getField("F325").schema();
+        this.f3260 = readerSchema.getField("F326").schema();
+        this.f3270 = readerSchema.getField("F327").schema();
+        this.f3280 = readerSchema.getField("F328").schema();
+        this.f3290 = readerSchema.getField("F329").schema();
+        this.f3300 = readerSchema.getField("F330").schema();
+        this.f3310 = readerSchema.getField("F331").schema();
+        this.f3320 = readerSchema.getField("F332").schema();
+        this.f3330 = readerSchema.getField("F333").schema();
+        this.f3340 = readerSchema.getField("F334").schema();
+        this.f3350 = readerSchema.getField("F335").schema();
+        this.f3360 = readerSchema.getField("F336").schema();
+        this.f3370 = readerSchema.getField("F337").schema();
+        this.f3380 = readerSchema.getField("F338").schema();
+        this.f3390 = readerSchema.getField("F339").schema();
+        this.f3400 = readerSchema.getField("F340").schema();
+        this.f3410 = readerSchema.getField("F341").schema();
+        this.f3420 = readerSchema.getField("F342").schema();
+        this.f3430 = readerSchema.getField("F343").schema();
+        this.f3440 = readerSchema.getField("F344").schema();
+        this.f3450 = readerSchema.getField("F345").schema();
+        this.f3460 = readerSchema.getField("F346").schema();
+        this.f3470 = readerSchema.getField("F347").schema();
+        this.f3480 = readerSchema.getField("F348").schema();
+        this.f3490 = readerSchema.getField("F349").schema();
+        this.f3500 = readerSchema.getField("F350").schema();
+        this.f3510 = readerSchema.getField("F351").schema();
+        this.f3520 = readerSchema.getField("F352").schema();
+        this.f3530 = readerSchema.getField("F353").schema();
+        this.f3540 = readerSchema.getField("F354").schema();
+        this.f3550 = readerSchema.getField("F355").schema();
+        this.f3560 = readerSchema.getField("F356").schema();
+        this.f3570 = readerSchema.getField("F357").schema();
+        this.f3580 = readerSchema.getField("F358").schema();
+        this.f3590 = readerSchema.getField("F359").schema();
+        this.f3600 = readerSchema.getField("F360").schema();
+        this.f3610 = readerSchema.getField("F361").schema();
+        this.f3620 = readerSchema.getField("F362").schema();
+        this.f3630 = readerSchema.getField("F363").schema();
+        this.f3640 = readerSchema.getField("F364").schema();
+        this.f3650 = readerSchema.getField("F365").schema();
+        this.f3660 = readerSchema.getField("F366").schema();
+        this.f3670 = readerSchema.getField("F367").schema();
+        this.f3680 = readerSchema.getField("F368").schema();
+        this.f3690 = readerSchema.getField("F369").schema();
+        this.f3700 = readerSchema.getField("F370").schema();
+        this.f3710 = readerSchema.getField("F371").schema();
+        this.f3720 = readerSchema.getField("F372").schema();
+        this.f3730 = readerSchema.getField("F373").schema();
+        this.f3740 = readerSchema.getField("F374").schema();
+        this.f3750 = readerSchema.getField("F375").schema();
+        this.f3760 = readerSchema.getField("F376").schema();
+        this.f3770 = readerSchema.getField("F377").schema();
+        this.f3780 = readerSchema.getField("F378").schema();
+        this.f3790 = readerSchema.getField("F379").schema();
+        this.f3800 = readerSchema.getField("F380").schema();
+        this.f3810 = readerSchema.getField("F381").schema();
+        this.f3820 = readerSchema.getField("F382").schema();
+        this.f3830 = readerSchema.getField("F383").schema();
+        this.f3840 = readerSchema.getField("F384").schema();
+        this.f3850 = readerSchema.getField("F385").schema();
+        this.f3860 = readerSchema.getField("F386").schema();
+        this.f3870 = readerSchema.getField("F387").schema();
+        this.f3880 = readerSchema.getField("F388").schema();
+        this.f3890 = readerSchema.getField("F389").schema();
+        this.f3900 = readerSchema.getField("F390").schema();
+        this.f3910 = readerSchema.getField("F391").schema();
+        this.f3920 = readerSchema.getField("F392").schema();
+        this.f3930 = readerSchema.getField("F393").schema();
+        this.f3940 = readerSchema.getField("F394").schema();
+        this.f3950 = readerSchema.getField("F395").schema();
+        this.f3960 = readerSchema.getField("F396").schema();
+        this.f3970 = readerSchema.getField("F397").schema();
+        this.f3980 = readerSchema.getField("F398").schema();
+        this.f3990 = readerSchema.getField("F399").schema();
+        this.f4000 = readerSchema.getField("F400").schema();
+        this.f4010 = readerSchema.getField("F401").schema();
+        this.f4020 = readerSchema.getField("F402").schema();
+        this.f4030 = readerSchema.getField("F403").schema();
+        this.f4040 = readerSchema.getField("F404").schema();
+        this.f4050 = readerSchema.getField("F405").schema();
+        this.f4060 = readerSchema.getField("F406").schema();
+        this.f4070 = readerSchema.getField("F407").schema();
+        this.f4080 = readerSchema.getField("F408").schema();
+        this.f4090 = readerSchema.getField("F409").schema();
+        this.f4100 = readerSchema.getField("F410").schema();
+        this.f4110 = readerSchema.getField("F411").schema();
+        this.f4120 = readerSchema.getField("F412").schema();
+        this.f4130 = readerSchema.getField("F413").schema();
+        this.f4140 = readerSchema.getField("F414").schema();
+        this.f4150 = readerSchema.getField("F415").schema();
+        this.f4160 = readerSchema.getField("F416").schema();
+        this.f4170 = readerSchema.getField("F417").schema();
+        this.f4180 = readerSchema.getField("F418").schema();
+        this.f4190 = readerSchema.getField("F419").schema();
+        this.f4200 = readerSchema.getField("F420").schema();
+        this.f4210 = readerSchema.getField("F421").schema();
+        this.f4220 = readerSchema.getField("F422").schema();
+        this.f4230 = readerSchema.getField("F423").schema();
+        this.f4240 = readerSchema.getField("F424").schema();
+        this.f4250 = readerSchema.getField("F425").schema();
+        this.f4260 = readerSchema.getField("F426").schema();
+        this.f4270 = readerSchema.getField("F427").schema();
+        this.f4280 = readerSchema.getField("F428").schema();
+        this.f4290 = readerSchema.getField("F429").schema();
+        this.f4300 = readerSchema.getField("F430").schema();
+        this.f4310 = readerSchema.getField("F431").schema();
+        this.f4320 = readerSchema.getField("F432").schema();
+        this.f4330 = readerSchema.getField("F433").schema();
+        this.f4340 = readerSchema.getField("F434").schema();
+        this.f4350 = readerSchema.getField("F435").schema();
+        this.f4360 = readerSchema.getField("F436").schema();
+        this.f4370 = readerSchema.getField("F437").schema();
+        this.f4380 = readerSchema.getField("F438").schema();
+        this.f4390 = readerSchema.getField("F439").schema();
+        this.f4400 = readerSchema.getField("F440").schema();
+        this.f4410 = readerSchema.getField("F441").schema();
+        this.f4420 = readerSchema.getField("F442").schema();
+        this.f4430 = readerSchema.getField("F443").schema();
+        this.f4440 = readerSchema.getField("F444").schema();
+        this.f4450 = readerSchema.getField("F445").schema();
+        this.f4460 = readerSchema.getField("F446").schema();
+        this.f4470 = readerSchema.getField("F447").schema();
+        this.f4480 = readerSchema.getField("F448").schema();
+        this.f4490 = readerSchema.getField("F449").schema();
+        this.f4500 = readerSchema.getField("F450").schema();
+        this.f4510 = readerSchema.getField("F451").schema();
+        this.f4520 = readerSchema.getField("F452").schema();
+        this.f4530 = readerSchema.getField("F453").schema();
+        this.f4540 = readerSchema.getField("F454").schema();
+        this.f4550 = readerSchema.getField("F455").schema();
+        this.f4560 = readerSchema.getField("F456").schema();
+        this.f4570 = readerSchema.getField("F457").schema();
+        this.f4580 = readerSchema.getField("F458").schema();
+        this.f4590 = readerSchema.getField("F459").schema();
+        this.f4600 = readerSchema.getField("F460").schema();
+        this.f4610 = readerSchema.getField("F461").schema();
+        this.f4620 = readerSchema.getField("F462").schema();
+        this.f4630 = readerSchema.getField("F463").schema();
+        this.f4640 = readerSchema.getField("F464").schema();
+        this.f4650 = readerSchema.getField("F465").schema();
+        this.f4660 = readerSchema.getField("F466").schema();
+        this.f4670 = readerSchema.getField("F467").schema();
+        this.f4680 = readerSchema.getField("F468").schema();
+        this.f4690 = readerSchema.getField("F469").schema();
+        this.f4700 = readerSchema.getField("F470").schema();
+        this.f4710 = readerSchema.getField("F471").schema();
+        this.f4720 = readerSchema.getField("F472").schema();
+        this.f4730 = readerSchema.getField("F473").schema();
+        this.f4740 = readerSchema.getField("F474").schema();
+        this.f4750 = readerSchema.getField("F475").schema();
+        this.f4760 = readerSchema.getField("F476").schema();
+        this.f4770 = readerSchema.getField("F477").schema();
+        this.f4780 = readerSchema.getField("F478").schema();
+        this.f4790 = readerSchema.getField("F479").schema();
+        this.f4800 = readerSchema.getField("F480").schema();
+        this.f4810 = readerSchema.getField("F481").schema();
+        this.f4820 = readerSchema.getField("F482").schema();
+        this.f4830 = readerSchema.getField("F483").schema();
+        this.f4840 = readerSchema.getField("F484").schema();
+        this.f4850 = readerSchema.getField("F485").schema();
+        this.f4860 = readerSchema.getField("F486").schema();
+        this.f4870 = readerSchema.getField("F487").schema();
+        this.f4880 = readerSchema.getField("F488").schema();
+        this.f4890 = readerSchema.getField("F489").schema();
+        this.f4900 = readerSchema.getField("F490").schema();
+        this.f4910 = readerSchema.getField("F491").schema();
+        this.f4920 = readerSchema.getField("F492").schema();
+        this.f4930 = readerSchema.getField("F493").schema();
+        this.f4940 = readerSchema.getField("F494").schema();
+        this.f4950 = readerSchema.getField("F495").schema();
+        this.f4960 = readerSchema.getField("F496").schema();
+        this.f4970 = readerSchema.getField("F497").schema();
+        this.f4980 = readerSchema.getField("F498").schema();
+        this.f4990 = readerSchema.getField("F499").schema();
+        this.f5000 = readerSchema.getField("F500").schema();
+        this.f5010 = readerSchema.getField("F501").schema();
+        this.f5020 = readerSchema.getField("F502").schema();
+        this.f5030 = readerSchema.getField("F503").schema();
+        this.f5040 = readerSchema.getField("F504").schema();
+        this.f5050 = readerSchema.getField("F505").schema();
+        this.f5060 = readerSchema.getField("F506").schema();
+        this.f5070 = readerSchema.getField("F507").schema();
+        this.f5080 = readerSchema.getField("F508").schema();
+        this.f5090 = readerSchema.getField("F509").schema();
+        this.f5100 = readerSchema.getField("F510").schema();
+        this.f5110 = readerSchema.getField("F511").schema();
+        this.f5120 = readerSchema.getField("F512").schema();
+        this.f5130 = readerSchema.getField("F513").schema();
+        this.f5140 = readerSchema.getField("F514").schema();
+        this.f5150 = readerSchema.getField("F515").schema();
+        this.f5160 = readerSchema.getField("F516").schema();
+        this.f5170 = readerSchema.getField("F517").schema();
+        this.f5180 = readerSchema.getField("F518").schema();
+        this.f5190 = readerSchema.getField("F519").schema();
+        this.f5200 = readerSchema.getField("F520").schema();
+        this.f5210 = readerSchema.getField("F521").schema();
+        this.f5220 = readerSchema.getField("F522").schema();
+        this.f5230 = readerSchema.getField("F523").schema();
+        this.f5240 = readerSchema.getField("F524").schema();
+        this.f5250 = readerSchema.getField("F525").schema();
+        this.f5260 = readerSchema.getField("F526").schema();
+        this.f5270 = readerSchema.getField("F527").schema();
+        this.f5280 = readerSchema.getField("F528").schema();
+        this.f5290 = readerSchema.getField("F529").schema();
+        this.f5300 = readerSchema.getField("F530").schema();
+        this.f5310 = readerSchema.getField("F531").schema();
+        this.f5320 = readerSchema.getField("F532").schema();
+        this.f5330 = readerSchema.getField("F533").schema();
+        this.f5340 = readerSchema.getField("F534").schema();
+        this.f5350 = readerSchema.getField("F535").schema();
+        this.f5360 = readerSchema.getField("F536").schema();
+        this.f5370 = readerSchema.getField("F537").schema();
+        this.f5380 = readerSchema.getField("F538").schema();
+        this.f5390 = readerSchema.getField("F539").schema();
+        this.f5400 = readerSchema.getField("F540").schema();
+        this.f5410 = readerSchema.getField("F541").schema();
+        this.f5420 = readerSchema.getField("F542").schema();
+        this.f5430 = readerSchema.getField("F543").schema();
+        this.f5440 = readerSchema.getField("F544").schema();
+        this.f5450 = readerSchema.getField("F545").schema();
+        this.f5460 = readerSchema.getField("F546").schema();
+        this.f5470 = readerSchema.getField("F547").schema();
+        this.f5480 = readerSchema.getField("F548").schema();
+        this.f5490 = readerSchema.getField("F549").schema();
+        this.f5500 = readerSchema.getField("F550").schema();
+        this.f5510 = readerSchema.getField("F551").schema();
+        this.f5520 = readerSchema.getField("F552").schema();
+        this.f5530 = readerSchema.getField("F553").schema();
+        this.f5540 = readerSchema.getField("F554").schema();
+        this.f5550 = readerSchema.getField("F555").schema();
+        this.f5560 = readerSchema.getField("F556").schema();
+        this.f5570 = readerSchema.getField("F557").schema();
+        this.f5580 = readerSchema.getField("F558").schema();
+        this.f5590 = readerSchema.getField("F559").schema();
+        this.f5600 = readerSchema.getField("F560").schema();
+        this.f5610 = readerSchema.getField("F561").schema();
+        this.f5620 = readerSchema.getField("F562").schema();
+        this.f5630 = readerSchema.getField("F563").schema();
+        this.f5640 = readerSchema.getField("F564").schema();
+        this.f5650 = readerSchema.getField("F565").schema();
+        this.f5660 = readerSchema.getField("F566").schema();
+        this.f5670 = readerSchema.getField("F567").schema();
+        this.f5680 = readerSchema.getField("F568").schema();
+        this.f5690 = readerSchema.getField("F569").schema();
+        this.f5700 = readerSchema.getField("F570").schema();
+        this.f5710 = readerSchema.getField("F571").schema();
+        this.f5720 = readerSchema.getField("F572").schema();
+        this.f5730 = readerSchema.getField("F573").schema();
+        this.f5740 = readerSchema.getField("F574").schema();
+        this.f5750 = readerSchema.getField("F575").schema();
+        this.f5760 = readerSchema.getField("F576").schema();
+        this.f5770 = readerSchema.getField("F577").schema();
+        this.f5780 = readerSchema.getField("F578").schema();
+        this.f5790 = readerSchema.getField("F579").schema();
+        this.f5800 = readerSchema.getField("F580").schema();
+        this.f5810 = readerSchema.getField("F581").schema();
+        this.f5820 = readerSchema.getField("F582").schema();
+        this.f5830 = readerSchema.getField("F583").schema();
+        this.f5840 = readerSchema.getField("F584").schema();
+        this.f5850 = readerSchema.getField("F585").schema();
+        this.f5860 = readerSchema.getField("F586").schema();
+        this.f5870 = readerSchema.getField("F587").schema();
+        this.f5880 = readerSchema.getField("F588").schema();
+        this.f5890 = readerSchema.getField("F589").schema();
+        this.f5900 = readerSchema.getField("F590").schema();
+        this.f5910 = readerSchema.getField("F591").schema();
+        this.f5920 = readerSchema.getField("F592").schema();
+        this.f5930 = readerSchema.getField("F593").schema();
+        this.f5940 = readerSchema.getField("F594").schema();
+        this.f5950 = readerSchema.getField("F595").schema();
+        this.f5960 = readerSchema.getField("F596").schema();
+        this.f5970 = readerSchema.getField("F597").schema();
+        this.f5980 = readerSchema.getField("F598").schema();
+        this.f5990 = readerSchema.getField("F599").schema();
+        this.f6000 = readerSchema.getField("F600").schema();
+        this.f6010 = readerSchema.getField("F601").schema();
+        this.f6020 = readerSchema.getField("F602").schema();
+        this.f6030 = readerSchema.getField("F603").schema();
+        this.f6040 = readerSchema.getField("F604").schema();
+        this.f6050 = readerSchema.getField("F605").schema();
+        this.f6060 = readerSchema.getField("F606").schema();
+        this.f6070 = readerSchema.getField("F607").schema();
+        this.f6080 = readerSchema.getField("F608").schema();
+        this.f6090 = readerSchema.getField("F609").schema();
+        this.f6100 = readerSchema.getField("F610").schema();
+        this.f6110 = readerSchema.getField("F611").schema();
+        this.f6120 = readerSchema.getField("F612").schema();
+        this.f6130 = readerSchema.getField("F613").schema();
+        this.f6140 = readerSchema.getField("F614").schema();
+        this.f6150 = readerSchema.getField("F615").schema();
+        this.f6160 = readerSchema.getField("F616").schema();
+        this.f6170 = readerSchema.getField("F617").schema();
+        this.f6180 = readerSchema.getField("F618").schema();
+        this.f6190 = readerSchema.getField("F619").schema();
+        this.f6200 = readerSchema.getField("F620").schema();
+        this.f6210 = readerSchema.getField("F621").schema();
+        this.f6220 = readerSchema.getField("F622").schema();
+        this.f6230 = readerSchema.getField("F623").schema();
+        this.f6240 = readerSchema.getField("F624").schema();
+        this.f6250 = readerSchema.getField("F625").schema();
+        this.f6260 = readerSchema.getField("F626").schema();
+        this.f6270 = readerSchema.getField("F627").schema();
+        this.f6280 = readerSchema.getField("F628").schema();
+        this.f6290 = readerSchema.getField("F629").schema();
+        this.f6300 = readerSchema.getField("F630").schema();
+        this.f6310 = readerSchema.getField("F631").schema();
+        this.f6320 = readerSchema.getField("F632").schema();
+        this.f6330 = readerSchema.getField("F633").schema();
+        this.f6340 = readerSchema.getField("F634").schema();
+        this.f6350 = readerSchema.getField("F635").schema();
+        this.f6360 = readerSchema.getField("F636").schema();
+        this.f6370 = readerSchema.getField("F637").schema();
+        this.f6380 = readerSchema.getField("F638").schema();
+        this.f6390 = readerSchema.getField("F639").schema();
+        this.f6400 = readerSchema.getField("F640").schema();
+        this.f6410 = readerSchema.getField("F641").schema();
+        this.f6420 = readerSchema.getField("F642").schema();
+        this.f6430 = readerSchema.getField("F643").schema();
+        this.f6440 = readerSchema.getField("F644").schema();
+        this.f6450 = readerSchema.getField("F645").schema();
+        this.f6460 = readerSchema.getField("F646").schema();
+        this.f6470 = readerSchema.getField("F647").schema();
+        this.f6480 = readerSchema.getField("F648").schema();
+        this.f6490 = readerSchema.getField("F649").schema();
+        this.f6500 = readerSchema.getField("F650").schema();
+        this.f6510 = readerSchema.getField("F651").schema();
+        this.f6520 = readerSchema.getField("F652").schema();
+        this.f6530 = readerSchema.getField("F653").schema();
+        this.f6540 = readerSchema.getField("F654").schema();
+        this.f6550 = readerSchema.getField("F655").schema();
+        this.f6560 = readerSchema.getField("F656").schema();
+        this.f6570 = readerSchema.getField("F657").schema();
+        this.f6580 = readerSchema.getField("F658").schema();
+        this.f6590 = readerSchema.getField("F659").schema();
+        this.f6600 = readerSchema.getField("F660").schema();
+        this.f6610 = readerSchema.getField("F661").schema();
+        this.f6620 = readerSchema.getField("F662").schema();
+        this.f6630 = readerSchema.getField("F663").schema();
+        this.f6640 = readerSchema.getField("F664").schema();
+        this.f6650 = readerSchema.getField("F665").schema();
+        this.f6660 = readerSchema.getField("F666").schema();
+        this.f6670 = readerSchema.getField("F667").schema();
+        this.f6680 = readerSchema.getField("F668").schema();
+        this.f6690 = readerSchema.getField("F669").schema();
+        this.f6700 = readerSchema.getField("F670").schema();
+        this.f6710 = readerSchema.getField("F671").schema();
+        this.f6720 = readerSchema.getField("F672").schema();
+        this.f6730 = readerSchema.getField("F673").schema();
+        this.f6740 = readerSchema.getField("F674").schema();
+        this.f6750 = readerSchema.getField("F675").schema();
+        this.f6760 = readerSchema.getField("F676").schema();
+        this.f6770 = readerSchema.getField("F677").schema();
+        this.f6780 = readerSchema.getField("F678").schema();
+        this.f6790 = readerSchema.getField("F679").schema();
+        this.f6800 = readerSchema.getField("F680").schema();
+        this.f6810 = readerSchema.getField("F681").schema();
+        this.f6820 = readerSchema.getField("F682").schema();
+        this.f6830 = readerSchema.getField("F683").schema();
+        this.f6840 = readerSchema.getField("F684").schema();
+        this.f6850 = readerSchema.getField("F685").schema();
+        this.f6860 = readerSchema.getField("F686").schema();
+        this.f6870 = readerSchema.getField("F687").schema();
+        this.f6880 = readerSchema.getField("F688").schema();
+        this.f6890 = readerSchema.getField("F689").schema();
+        this.f6900 = readerSchema.getField("F690").schema();
+        this.f6910 = readerSchema.getField("F691").schema();
+        this.f6920 = readerSchema.getField("F692").schema();
+        this.f6930 = readerSchema.getField("F693").schema();
+        this.f6940 = readerSchema.getField("F694").schema();
+        this.f6950 = readerSchema.getField("F695").schema();
+        this.f6960 = readerSchema.getField("F696").schema();
+        this.f6970 = readerSchema.getField("F697").schema();
+        this.f6980 = readerSchema.getField("F698").schema();
+        this.f6990 = readerSchema.getField("F699").schema();
+        this.f7000 = readerSchema.getField("F700").schema();
+        this.f7010 = readerSchema.getField("F701").schema();
+        this.f7020 = readerSchema.getField("F702").schema();
+        this.f7030 = readerSchema.getField("F703").schema();
+        this.f7040 = readerSchema.getField("F704").schema();
+        this.f7050 = readerSchema.getField("F705").schema();
+        this.f7060 = readerSchema.getField("F706").schema();
+        this.f7070 = readerSchema.getField("F707").schema();
+        this.f7080 = readerSchema.getField("F708").schema();
+        this.f7090 = readerSchema.getField("F709").schema();
+        this.f7100 = readerSchema.getField("F710").schema();
+        this.f7110 = readerSchema.getField("F711").schema();
+        this.f7120 = readerSchema.getField("F712").schema();
+        this.f7130 = readerSchema.getField("F713").schema();
+        this.f7140 = readerSchema.getField("F714").schema();
+        this.f7150 = readerSchema.getField("F715").schema();
+        this.f7160 = readerSchema.getField("F716").schema();
+        this.f7170 = readerSchema.getField("F717").schema();
+        this.f7180 = readerSchema.getField("F718").schema();
+        this.f7190 = readerSchema.getField("F719").schema();
+        this.f7200 = readerSchema.getField("F720").schema();
+        this.f7210 = readerSchema.getField("F721").schema();
+        this.f7220 = readerSchema.getField("F722").schema();
+        this.f7230 = readerSchema.getField("F723").schema();
+        this.f7240 = readerSchema.getField("F724").schema();
+        this.f7250 = readerSchema.getField("F725").schema();
+        this.f7260 = readerSchema.getField("F726").schema();
+        this.f7270 = readerSchema.getField("F727").schema();
+        this.f7280 = readerSchema.getField("F728").schema();
+        this.f7290 = readerSchema.getField("F729").schema();
+        this.f7300 = readerSchema.getField("F730").schema();
+        this.f7310 = readerSchema.getField("F731").schema();
+        this.f7320 = readerSchema.getField("F732").schema();
+        this.f7330 = readerSchema.getField("F733").schema();
+        this.f7340 = readerSchema.getField("F734").schema();
+        this.f7350 = readerSchema.getField("F735").schema();
+        this.f7360 = readerSchema.getField("F736").schema();
+        this.f7370 = readerSchema.getField("F737").schema();
+        this.f7380 = readerSchema.getField("F738").schema();
+        this.f7390 = readerSchema.getField("F739").schema();
+        this.f7400 = readerSchema.getField("F740").schema();
+        this.f7410 = readerSchema.getField("F741").schema();
+        this.f7420 = readerSchema.getField("F742").schema();
+        this.f7430 = readerSchema.getField("F743").schema();
+        this.f7440 = readerSchema.getField("F744").schema();
+        this.f7450 = readerSchema.getField("F745").schema();
+        this.f7460 = readerSchema.getField("F746").schema();
+        this.f7470 = readerSchema.getField("F747").schema();
+        this.f7480 = readerSchema.getField("F748").schema();
+        this.f7490 = readerSchema.getField("F749").schema();
+        this.f7500 = readerSchema.getField("F750").schema();
+        this.f7510 = readerSchema.getField("F751").schema();
+        this.f7520 = readerSchema.getField("F752").schema();
+        this.f7530 = readerSchema.getField("F753").schema();
+        this.f7540 = readerSchema.getField("F754").schema();
+        this.f7550 = readerSchema.getField("F755").schema();
+        this.f7560 = readerSchema.getField("F756").schema();
+        this.f7570 = readerSchema.getField("F757").schema();
+        this.f7580 = readerSchema.getField("F758").schema();
+        this.f7590 = readerSchema.getField("F759").schema();
+        this.f7600 = readerSchema.getField("F760").schema();
+        this.f7610 = readerSchema.getField("F761").schema();
+        this.f7620 = readerSchema.getField("F762").schema();
+        this.f7630 = readerSchema.getField("F763").schema();
+        this.f7640 = readerSchema.getField("F764").schema();
+        this.f7650 = readerSchema.getField("F765").schema();
+        this.f7660 = readerSchema.getField("F766").schema();
+        this.f7670 = readerSchema.getField("F767").schema();
+        this.f7680 = readerSchema.getField("F768").schema();
+        this.f7690 = readerSchema.getField("F769").schema();
+        this.f7700 = readerSchema.getField("F770").schema();
+        this.f7710 = readerSchema.getField("F771").schema();
+        this.f7720 = readerSchema.getField("F772").schema();
+        this.f7730 = readerSchema.getField("F773").schema();
+        this.f7740 = readerSchema.getField("F774").schema();
+        this.f7750 = readerSchema.getField("F775").schema();
+        this.f7760 = readerSchema.getField("F776").schema();
+        this.f7770 = readerSchema.getField("F777").schema();
+        this.f7780 = readerSchema.getField("F778").schema();
+        this.f7790 = readerSchema.getField("F779").schema();
+        this.f7800 = readerSchema.getField("F780").schema();
+        this.f7810 = readerSchema.getField("F781").schema();
+        this.f7820 = readerSchema.getField("F782").schema();
+        this.f7830 = readerSchema.getField("F783").schema();
+        this.f7840 = readerSchema.getField("F784").schema();
+        this.f7850 = readerSchema.getField("F785").schema();
+        this.f7860 = readerSchema.getField("F786").schema();
+        this.f7870 = readerSchema.getField("F787").schema();
+        this.f7880 = readerSchema.getField("F788").schema();
+        this.f7890 = readerSchema.getField("F789").schema();
+        this.f7900 = readerSchema.getField("F790").schema();
+        this.f7910 = readerSchema.getField("F791").schema();
+        this.f7920 = readerSchema.getField("F792").schema();
+        this.f7930 = readerSchema.getField("F793").schema();
+        this.f7940 = readerSchema.getField("F794").schema();
+        this.f7950 = readerSchema.getField("F795").schema();
+        this.f7960 = readerSchema.getField("F796").schema();
+        this.f7970 = readerSchema.getField("F797").schema();
+        this.f7980 = readerSchema.getField("F798").schema();
+        this.f7990 = readerSchema.getField("F799").schema();
+        this.f8000 = readerSchema.getField("F800").schema();
+        this.f8010 = readerSchema.getField("F801").schema();
+        this.f8020 = readerSchema.getField("F802").schema();
+        this.f8030 = readerSchema.getField("F803").schema();
+        this.f8040 = readerSchema.getField("F804").schema();
+        this.f8050 = readerSchema.getField("F805").schema();
+        this.f8060 = readerSchema.getField("F806").schema();
+        this.f8070 = readerSchema.getField("F807").schema();
+        this.f8080 = readerSchema.getField("F808").schema();
+        this.f8090 = readerSchema.getField("F809").schema();
+        this.f8100 = readerSchema.getField("F810").schema();
+        this.f8110 = readerSchema.getField("F811").schema();
+        this.f8120 = readerSchema.getField("F812").schema();
+        this.f8130 = readerSchema.getField("F813").schema();
+        this.f8140 = readerSchema.getField("F814").schema();
+        this.f8150 = readerSchema.getField("F815").schema();
+        this.f8160 = readerSchema.getField("F816").schema();
+        this.f8170 = readerSchema.getField("F817").schema();
+        this.f8180 = readerSchema.getField("F818").schema();
+        this.f8190 = readerSchema.getField("F819").schema();
+        this.f8200 = readerSchema.getField("F820").schema();
+        this.f8210 = readerSchema.getField("F821").schema();
+        this.f8220 = readerSchema.getField("F822").schema();
+        this.f8230 = readerSchema.getField("F823").schema();
+        this.f8240 = readerSchema.getField("F824").schema();
+        this.f8250 = readerSchema.getField("F825").schema();
+        this.f8260 = readerSchema.getField("F826").schema();
+        this.f8270 = readerSchema.getField("F827").schema();
+        this.f8280 = readerSchema.getField("F828").schema();
+        this.f8290 = readerSchema.getField("F829").schema();
+        this.f8300 = readerSchema.getField("F830").schema();
+        this.f8310 = readerSchema.getField("F831").schema();
+        this.f8320 = readerSchema.getField("F832").schema();
+        this.f8330 = readerSchema.getField("F833").schema();
+        this.f8340 = readerSchema.getField("F834").schema();
+        this.f8350 = readerSchema.getField("F835").schema();
+        this.f8360 = readerSchema.getField("F836").schema();
+        this.f8370 = readerSchema.getField("F837").schema();
+        this.f8380 = readerSchema.getField("F838").schema();
+        this.f8390 = readerSchema.getField("F839").schema();
+        this.f8400 = readerSchema.getField("F840").schema();
+        this.f8410 = readerSchema.getField("F841").schema();
+        this.f8420 = readerSchema.getField("F842").schema();
+        this.f8430 = readerSchema.getField("F843").schema();
+        this.f8440 = readerSchema.getField("F844").schema();
+        this.f8450 = readerSchema.getField("F845").schema();
+        this.f8460 = readerSchema.getField("F846").schema();
+        this.f8470 = readerSchema.getField("F847").schema();
+        this.f8480 = readerSchema.getField("F848").schema();
+        this.f8490 = readerSchema.getField("F849").schema();
+        this.f8500 = readerSchema.getField("F850").schema();
+        this.f8510 = readerSchema.getField("F851").schema();
+        this.f8520 = readerSchema.getField("F852").schema();
+        this.f8530 = readerSchema.getField("F853").schema();
+        this.f8540 = readerSchema.getField("F854").schema();
+        this.f8550 = readerSchema.getField("F855").schema();
+        this.f8560 = readerSchema.getField("F856").schema();
+        this.f8570 = readerSchema.getField("F857").schema();
+        this.f8580 = readerSchema.getField("F858").schema();
+        this.f8590 = readerSchema.getField("F859").schema();
+        this.f8600 = readerSchema.getField("F860").schema();
+        this.f8610 = readerSchema.getField("F861").schema();
+        this.f8620 = readerSchema.getField("F862").schema();
+        this.f8630 = readerSchema.getField("F863").schema();
+        this.f8640 = readerSchema.getField("F864").schema();
+        this.f8650 = readerSchema.getField("F865").schema();
+        this.f8660 = readerSchema.getField("F866").schema();
+        this.f8670 = readerSchema.getField("F867").schema();
+        this.f8680 = readerSchema.getField("F868").schema();
+        this.f8690 = readerSchema.getField("F869").schema();
+        this.f8700 = readerSchema.getField("F870").schema();
+        this.f8710 = readerSchema.getField("F871").schema();
+        this.f8720 = readerSchema.getField("F872").schema();
+        this.f8730 = readerSchema.getField("F873").schema();
+        this.f8740 = readerSchema.getField("F874").schema();
+        this.f8750 = readerSchema.getField("F875").schema();
+        this.f8760 = readerSchema.getField("F876").schema();
+        this.f8770 = readerSchema.getField("F877").schema();
+        this.f8780 = readerSchema.getField("F878").schema();
+        this.f8790 = readerSchema.getField("F879").schema();
+        this.f8800 = readerSchema.getField("F880").schema();
+        this.f8810 = readerSchema.getField("F881").schema();
+        this.f8820 = readerSchema.getField("F882").schema();
+        this.f8830 = readerSchema.getField("F883").schema();
+        this.f8840 = readerSchema.getField("F884").schema();
+        this.f8850 = readerSchema.getField("F885").schema();
+        this.f8860 = readerSchema.getField("F886").schema();
+        this.f8870 = readerSchema.getField("F887").schema();
+        this.f8880 = readerSchema.getField("F888").schema();
+        this.f8890 = readerSchema.getField("F889").schema();
+        this.f8900 = readerSchema.getField("F890").schema();
+        this.f8910 = readerSchema.getField("F891").schema();
+        this.f8920 = readerSchema.getField("F892").schema();
+        this.f8930 = readerSchema.getField("F893").schema();
+        this.f8940 = readerSchema.getField("F894").schema();
+        this.f8950 = readerSchema.getField("F895").schema();
+        this.f8960 = readerSchema.getField("F896").schema();
+        this.f8970 = readerSchema.getField("F897").schema();
+        this.f8980 = readerSchema.getField("F898").schema();
+        this.f8990 = readerSchema.getField("F899").schema();
+        this.f9000 = readerSchema.getField("F900").schema();
+        this.f9010 = readerSchema.getField("F901").schema();
+        this.f9020 = readerSchema.getField("F902").schema();
+        this.f9030 = readerSchema.getField("F903").schema();
+        this.f9040 = readerSchema.getField("F904").schema();
+        this.f9050 = readerSchema.getField("F905").schema();
+        this.f9060 = readerSchema.getField("F906").schema();
+        this.f9070 = readerSchema.getField("F907").schema();
+        this.f9080 = readerSchema.getField("F908").schema();
+        this.f9090 = readerSchema.getField("F909").schema();
+        this.f9100 = readerSchema.getField("F910").schema();
+        this.f9110 = readerSchema.getField("F911").schema();
+        this.f9120 = readerSchema.getField("F912").schema();
+        this.f9130 = readerSchema.getField("F913").schema();
+        this.f9140 = readerSchema.getField("F914").schema();
+        this.f9150 = readerSchema.getField("F915").schema();
+        this.f9160 = readerSchema.getField("F916").schema();
+        this.f9170 = readerSchema.getField("F917").schema();
+        this.f9180 = readerSchema.getField("F918").schema();
+        this.f9190 = readerSchema.getField("F919").schema();
+        this.f9200 = readerSchema.getField("F920").schema();
+        this.f9210 = readerSchema.getField("F921").schema();
+        this.f9220 = readerSchema.getField("F922").schema();
+        this.f9230 = readerSchema.getField("F923").schema();
+        this.f9240 = readerSchema.getField("F924").schema();
+        this.f9250 = readerSchema.getField("F925").schema();
+        this.f9260 = readerSchema.getField("F926").schema();
+        this.f9270 = readerSchema.getField("F927").schema();
+        this.f9280 = readerSchema.getField("F928").schema();
+        this.f9290 = readerSchema.getField("F929").schema();
+        this.f9300 = readerSchema.getField("F930").schema();
+        this.f9310 = readerSchema.getField("F931").schema();
+        this.f9320 = readerSchema.getField("F932").schema();
+        this.f9330 = readerSchema.getField("F933").schema();
+        this.f9340 = readerSchema.getField("F934").schema();
+        this.f9350 = readerSchema.getField("F935").schema();
+        this.f9360 = readerSchema.getField("F936").schema();
+        this.f9370 = readerSchema.getField("F937").schema();
+        this.f9380 = readerSchema.getField("F938").schema();
+        this.f9390 = readerSchema.getField("F939").schema();
+        this.f9400 = readerSchema.getField("F940").schema();
+        this.f9410 = readerSchema.getField("F941").schema();
+        this.f9420 = readerSchema.getField("F942").schema();
+        this.f9430 = readerSchema.getField("F943").schema();
+        this.f9440 = readerSchema.getField("F944").schema();
+        this.f9450 = readerSchema.getField("F945").schema();
+        this.f9460 = readerSchema.getField("F946").schema();
+        this.f9470 = readerSchema.getField("F947").schema();
+        this.f9480 = readerSchema.getField("F948").schema();
+        this.f9490 = readerSchema.getField("F949").schema();
+        this.f9500 = readerSchema.getField("F950").schema();
+        this.f9510 = readerSchema.getField("F951").schema();
+        this.f9520 = readerSchema.getField("F952").schema();
+        this.f9530 = readerSchema.getField("F953").schema();
+        this.f9540 = readerSchema.getField("F954").schema();
+        this.f9550 = readerSchema.getField("F955").schema();
+        this.f9560 = readerSchema.getField("F956").schema();
+        this.f9570 = readerSchema.getField("F957").schema();
+        this.f9580 = readerSchema.getField("F958").schema();
+        this.f9590 = readerSchema.getField("F959").schema();
+        this.f9600 = readerSchema.getField("F960").schema();
+        this.f9610 = readerSchema.getField("F961").schema();
+        this.f9620 = readerSchema.getField("F962").schema();
+        this.f9630 = readerSchema.getField("F963").schema();
+        this.f9640 = readerSchema.getField("F964").schema();
+        this.f9650 = readerSchema.getField("F965").schema();
+        this.f9660 = readerSchema.getField("F966").schema();
+        this.f9670 = readerSchema.getField("F967").schema();
+        this.f9680 = readerSchema.getField("F968").schema();
+        this.f9690 = readerSchema.getField("F969").schema();
+        this.f9700 = readerSchema.getField("F970").schema();
+        this.f9710 = readerSchema.getField("F971").schema();
+        this.f9720 = readerSchema.getField("F972").schema();
+        this.f9730 = readerSchema.getField("F973").schema();
+        this.f9740 = readerSchema.getField("F974").schema();
+        this.f9750 = readerSchema.getField("F975").schema();
+        this.f9760 = readerSchema.getField("F976").schema();
+        this.f9770 = readerSchema.getField("F977").schema();
+        this.f9780 = readerSchema.getField("F978").schema();
+        this.f9790 = readerSchema.getField("F979").schema();
+        this.f9800 = readerSchema.getField("F980").schema();
+        this.f9810 = readerSchema.getField("F981").schema();
+        this.f9820 = readerSchema.getField("F982").schema();
+        this.f9830 = readerSchema.getField("F983").schema();
+        this.f9840 = readerSchema.getField("F984").schema();
+        this.f9850 = readerSchema.getField("F985").schema();
+        this.f9860 = readerSchema.getField("F986").schema();
+        this.f9870 = readerSchema.getField("F987").schema();
+        this.f9880 = readerSchema.getField("F988").schema();
+        this.f9890 = readerSchema.getField("F989").schema();
+        this.f9900 = readerSchema.getField("F990").schema();
+        this.f9910 = readerSchema.getField("F991").schema();
+        this.f9920 = readerSchema.getField("F992").schema();
+        this.f9930 = readerSchema.getField("F993").schema();
+        this.f9940 = readerSchema.getField("F994").schema();
+        this.f9950 = readerSchema.getField("F995").schema();
+        this.f9960 = readerSchema.getField("F996").schema();
+        this.f9970 = readerSchema.getField("F997").schema();
+        this.f9980 = readerSchema.getField("F998").schema();
+        this.f9990 = readerSchema.getField("F999").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F0': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F1': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(2);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(3);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F3': "+ unionIndex3));
+            }
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence4;
+                Object oldString4 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(4);
+                if (oldString4 instanceof Utf8) {
+                    charSequence4 = (decoder).readString(((Utf8) oldString4));
+                } else {
+                    charSequence4 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, charSequence4);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F4': "+ unionIndex4));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Utf8 charSequence5;
+                Object oldString5 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(5);
+                if (oldString5 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) oldString5));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, charSequence5);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F5': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence6;
+                Object oldString6 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(6);
+                if (oldString6 instanceof Utf8) {
+                    charSequence6 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence6 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, charSequence6);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F6': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence7;
+                Object oldString7 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(7);
+                if (oldString7 instanceof Utf8) {
+                    charSequence7 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence7 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, charSequence7);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F7': "+ unionIndex7));
+            }
+        }
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, null);
+        } else {
+            if (unionIndex8 == 1) {
+                Utf8 charSequence8;
+                Object oldString8 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(8);
+                if (oldString8 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString8));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, charSequence8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F8': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, null);
+        } else {
+            if (unionIndex9 == 1) {
+                Utf8 charSequence9;
+                Object oldString9 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(9);
+                if (oldString9 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString9));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F9': "+ unionIndex9));
+            }
+        }
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, null);
+        } else {
+            if (unionIndex10 == 1) {
+                Utf8 charSequence10;
+                Object oldString10 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(10);
+                if (oldString10 instanceof Utf8) {
+                    charSequence10 = (decoder).readString(((Utf8) oldString10));
+                } else {
+                    charSequence10 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, charSequence10);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F10': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, null);
+        } else {
+            if (unionIndex11 == 1) {
+                Utf8 charSequence11;
+                Object oldString11 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(11);
+                if (oldString11 instanceof Utf8) {
+                    charSequence11 = (decoder).readString(((Utf8) oldString11));
+                } else {
+                    charSequence11 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, charSequence11);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F11': "+ unionIndex11));
+            }
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence12;
+                Object oldString12 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(12);
+                if (oldString12 instanceof Utf8) {
+                    charSequence12 = (decoder).readString(((Utf8) oldString12));
+                } else {
+                    charSequence12 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, charSequence12);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F12': "+ unionIndex12));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence13;
+                Object oldString13 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(13);
+                if (oldString13 instanceof Utf8) {
+                    charSequence13 = (decoder).readString(((Utf8) oldString13));
+                } else {
+                    charSequence13 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, charSequence13);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F13': "+ unionIndex13));
+            }
+        }
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence14;
+                Object oldString14 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(14);
+                if (oldString14 instanceof Utf8) {
+                    charSequence14 = (decoder).readString(((Utf8) oldString14));
+                } else {
+                    charSequence14 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, charSequence14);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F14': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence15;
+                Object oldString15 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(15);
+                if (oldString15 instanceof Utf8) {
+                    charSequence15 = (decoder).readString(((Utf8) oldString15));
+                } else {
+                    charSequence15 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, charSequence15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F15': "+ unionIndex15));
+            }
+        }
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Utf8 charSequence16;
+                Object oldString16 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(16);
+                if (oldString16 instanceof Utf8) {
+                    charSequence16 = (decoder).readString(((Utf8) oldString16));
+                } else {
+                    charSequence16 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, charSequence16);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F16': "+ unionIndex16));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Utf8 charSequence17;
+                Object oldString17 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(17);
+                if (oldString17 instanceof Utf8) {
+                    charSequence17 = (decoder).readString(((Utf8) oldString17));
+                } else {
+                    charSequence17 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, charSequence17);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F17': "+ unionIndex17));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Utf8 charSequence18;
+                Object oldString18 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(18);
+                if (oldString18 instanceof Utf8) {
+                    charSequence18 = (decoder).readString(((Utf8) oldString18));
+                } else {
+                    charSequence18 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, charSequence18);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F18': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex19 = (decoder.readIndex());
+        if (unionIndex19 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, null);
+        } else {
+            if (unionIndex19 == 1) {
+                Utf8 charSequence19;
+                Object oldString19 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(19);
+                if (oldString19 instanceof Utf8) {
+                    charSequence19 = (decoder).readString(((Utf8) oldString19));
+                } else {
+                    charSequence19 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, charSequence19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F19': "+ unionIndex19));
+            }
+        }
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, null);
+        } else {
+            if (unionIndex20 == 1) {
+                Utf8 charSequence20;
+                Object oldString20 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(20);
+                if (oldString20 instanceof Utf8) {
+                    charSequence20 = (decoder).readString(((Utf8) oldString20));
+                } else {
+                    charSequence20 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, charSequence20);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F20': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, null);
+        } else {
+            if (unionIndex21 == 1) {
+                Utf8 charSequence21;
+                Object oldString21 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(21);
+                if (oldString21 instanceof Utf8) {
+                    charSequence21 = (decoder).readString(((Utf8) oldString21));
+                } else {
+                    charSequence21 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, charSequence21);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F21': "+ unionIndex21));
+            }
+        }
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Utf8 charSequence22;
+                Object oldString22 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(22);
+                if (oldString22 instanceof Utf8) {
+                    charSequence22 = (decoder).readString(((Utf8) oldString22));
+                } else {
+                    charSequence22 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, charSequence22);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F22': "+ unionIndex22));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Utf8 charSequence23;
+                Object oldString23 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(23);
+                if (oldString23 instanceof Utf8) {
+                    charSequence23 = (decoder).readString(((Utf8) oldString23));
+                } else {
+                    charSequence23 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, charSequence23);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F23': "+ unionIndex23));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Utf8 charSequence24;
+                Object oldString24 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(24);
+                if (oldString24 instanceof Utf8) {
+                    charSequence24 = (decoder).readString(((Utf8) oldString24));
+                } else {
+                    charSequence24 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, charSequence24);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F24': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, null);
+        } else {
+            if (unionIndex25 == 1) {
+                Utf8 charSequence25;
+                Object oldString25 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(25);
+                if (oldString25 instanceof Utf8) {
+                    charSequence25 = (decoder).readString(((Utf8) oldString25));
+                } else {
+                    charSequence25 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, charSequence25);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F25': "+ unionIndex25));
+            }
+        }
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, null);
+        } else {
+            if (unionIndex26 == 1) {
+                Utf8 charSequence26;
+                Object oldString26 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(26);
+                if (oldString26 instanceof Utf8) {
+                    charSequence26 = (decoder).readString(((Utf8) oldString26));
+                } else {
+                    charSequence26 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, charSequence26);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F26': "+ unionIndex26));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex27 = (decoder.readIndex());
+        if (unionIndex27 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, null);
+        } else {
+            if (unionIndex27 == 1) {
+                Utf8 charSequence27;
+                Object oldString27 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(27);
+                if (oldString27 instanceof Utf8) {
+                    charSequence27 = (decoder).readString(((Utf8) oldString27));
+                } else {
+                    charSequence27 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, charSequence27);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F27': "+ unionIndex27));
+            }
+        }
+        int unionIndex28 = (decoder.readIndex());
+        if (unionIndex28 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, null);
+        } else {
+            if (unionIndex28 == 1) {
+                Utf8 charSequence28;
+                Object oldString28 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(28);
+                if (oldString28 instanceof Utf8) {
+                    charSequence28 = (decoder).readString(((Utf8) oldString28));
+                } else {
+                    charSequence28 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, charSequence28);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F28': "+ unionIndex28));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex29 = (decoder.readIndex());
+        if (unionIndex29 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, null);
+        } else {
+            if (unionIndex29 == 1) {
+                Utf8 charSequence29;
+                Object oldString29 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(29);
+                if (oldString29 instanceof Utf8) {
+                    charSequence29 = (decoder).readString(((Utf8) oldString29));
+                } else {
+                    charSequence29 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, charSequence29);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F29': "+ unionIndex29));
+            }
+        }
+        int unionIndex30 = (decoder.readIndex());
+        if (unionIndex30 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, null);
+        } else {
+            if (unionIndex30 == 1) {
+                Utf8 charSequence30;
+                Object oldString30 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(30);
+                if (oldString30 instanceof Utf8) {
+                    charSequence30 = (decoder).readString(((Utf8) oldString30));
+                } else {
+                    charSequence30 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, charSequence30);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F30': "+ unionIndex30));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex31 = (decoder.readIndex());
+        if (unionIndex31 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, null);
+        } else {
+            if (unionIndex31 == 1) {
+                Utf8 charSequence31;
+                Object oldString31 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(31);
+                if (oldString31 instanceof Utf8) {
+                    charSequence31 = (decoder).readString(((Utf8) oldString31));
+                } else {
+                    charSequence31 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, charSequence31);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F31': "+ unionIndex31));
+            }
+        }
+        int unionIndex32 = (decoder.readIndex());
+        if (unionIndex32 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, null);
+        } else {
+            if (unionIndex32 == 1) {
+                Utf8 charSequence32;
+                Object oldString32 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(32);
+                if (oldString32 instanceof Utf8) {
+                    charSequence32 = (decoder).readString(((Utf8) oldString32));
+                } else {
+                    charSequence32 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, charSequence32);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F32': "+ unionIndex32));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex33 = (decoder.readIndex());
+        if (unionIndex33 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, null);
+        } else {
+            if (unionIndex33 == 1) {
+                Utf8 charSequence33;
+                Object oldString33 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(33);
+                if (oldString33 instanceof Utf8) {
+                    charSequence33 = (decoder).readString(((Utf8) oldString33));
+                } else {
+                    charSequence33 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, charSequence33);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F33': "+ unionIndex33));
+            }
+        }
+        int unionIndex34 = (decoder.readIndex());
+        if (unionIndex34 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, null);
+        } else {
+            if (unionIndex34 == 1) {
+                Utf8 charSequence34;
+                Object oldString34 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(34);
+                if (oldString34 instanceof Utf8) {
+                    charSequence34 = (decoder).readString(((Utf8) oldString34));
+                } else {
+                    charSequence34 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, charSequence34);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F34': "+ unionIndex34));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex35 = (decoder.readIndex());
+        if (unionIndex35 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, null);
+        } else {
+            if (unionIndex35 == 1) {
+                Utf8 charSequence35;
+                Object oldString35 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(35);
+                if (oldString35 instanceof Utf8) {
+                    charSequence35 = (decoder).readString(((Utf8) oldString35));
+                } else {
+                    charSequence35 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, charSequence35);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F35': "+ unionIndex35));
+            }
+        }
+        int unionIndex36 = (decoder.readIndex());
+        if (unionIndex36 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, null);
+        } else {
+            if (unionIndex36 == 1) {
+                Utf8 charSequence36;
+                Object oldString36 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(36);
+                if (oldString36 instanceof Utf8) {
+                    charSequence36 = (decoder).readString(((Utf8) oldString36));
+                } else {
+                    charSequence36 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, charSequence36);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F36': "+ unionIndex36));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex37 = (decoder.readIndex());
+        if (unionIndex37 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, null);
+        } else {
+            if (unionIndex37 == 1) {
+                Utf8 charSequence37;
+                Object oldString37 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(37);
+                if (oldString37 instanceof Utf8) {
+                    charSequence37 = (decoder).readString(((Utf8) oldString37));
+                } else {
+                    charSequence37 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, charSequence37);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F37': "+ unionIndex37));
+            }
+        }
+        int unionIndex38 = (decoder.readIndex());
+        if (unionIndex38 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, null);
+        } else {
+            if (unionIndex38 == 1) {
+                Utf8 charSequence38;
+                Object oldString38 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(38);
+                if (oldString38 instanceof Utf8) {
+                    charSequence38 = (decoder).readString(((Utf8) oldString38));
+                } else {
+                    charSequence38 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, charSequence38);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F38': "+ unionIndex38));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex39 = (decoder.readIndex());
+        if (unionIndex39 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, null);
+        } else {
+            if (unionIndex39 == 1) {
+                Utf8 charSequence39;
+                Object oldString39 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(39);
+                if (oldString39 instanceof Utf8) {
+                    charSequence39 = (decoder).readString(((Utf8) oldString39));
+                } else {
+                    charSequence39 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, charSequence39);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F39': "+ unionIndex39));
+            }
+        }
+        int unionIndex40 = (decoder.readIndex());
+        if (unionIndex40 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, null);
+        } else {
+            if (unionIndex40 == 1) {
+                Utf8 charSequence40;
+                Object oldString40 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(40);
+                if (oldString40 instanceof Utf8) {
+                    charSequence40 = (decoder).readString(((Utf8) oldString40));
+                } else {
+                    charSequence40 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, charSequence40);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F40': "+ unionIndex40));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex41 = (decoder.readIndex());
+        if (unionIndex41 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, null);
+        } else {
+            if (unionIndex41 == 1) {
+                Utf8 charSequence41;
+                Object oldString41 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(41);
+                if (oldString41 instanceof Utf8) {
+                    charSequence41 = (decoder).readString(((Utf8) oldString41));
+                } else {
+                    charSequence41 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, charSequence41);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F41': "+ unionIndex41));
+            }
+        }
+        int unionIndex42 = (decoder.readIndex());
+        if (unionIndex42 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, null);
+        } else {
+            if (unionIndex42 == 1) {
+                Utf8 charSequence42;
+                Object oldString42 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(42);
+                if (oldString42 instanceof Utf8) {
+                    charSequence42 = (decoder).readString(((Utf8) oldString42));
+                } else {
+                    charSequence42 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, charSequence42);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F42': "+ unionIndex42));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex43 = (decoder.readIndex());
+        if (unionIndex43 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, null);
+        } else {
+            if (unionIndex43 == 1) {
+                Utf8 charSequence43;
+                Object oldString43 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(43);
+                if (oldString43 instanceof Utf8) {
+                    charSequence43 = (decoder).readString(((Utf8) oldString43));
+                } else {
+                    charSequence43 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, charSequence43);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F43': "+ unionIndex43));
+            }
+        }
+        int unionIndex44 = (decoder.readIndex());
+        if (unionIndex44 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, null);
+        } else {
+            if (unionIndex44 == 1) {
+                Utf8 charSequence44;
+                Object oldString44 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(44);
+                if (oldString44 instanceof Utf8) {
+                    charSequence44 = (decoder).readString(((Utf8) oldString44));
+                } else {
+                    charSequence44 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, charSequence44);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F44': "+ unionIndex44));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex45 = (decoder.readIndex());
+        if (unionIndex45 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, null);
+        } else {
+            if (unionIndex45 == 1) {
+                Utf8 charSequence45;
+                Object oldString45 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(45);
+                if (oldString45 instanceof Utf8) {
+                    charSequence45 = (decoder).readString(((Utf8) oldString45));
+                } else {
+                    charSequence45 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, charSequence45);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F45': "+ unionIndex45));
+            }
+        }
+        int unionIndex46 = (decoder.readIndex());
+        if (unionIndex46 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, null);
+        } else {
+            if (unionIndex46 == 1) {
+                Utf8 charSequence46;
+                Object oldString46 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(46);
+                if (oldString46 instanceof Utf8) {
+                    charSequence46 = (decoder).readString(((Utf8) oldString46));
+                } else {
+                    charSequence46 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, charSequence46);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F46': "+ unionIndex46));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex47 = (decoder.readIndex());
+        if (unionIndex47 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, null);
+        } else {
+            if (unionIndex47 == 1) {
+                Utf8 charSequence47;
+                Object oldString47 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(47);
+                if (oldString47 instanceof Utf8) {
+                    charSequence47 = (decoder).readString(((Utf8) oldString47));
+                } else {
+                    charSequence47 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, charSequence47);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F47': "+ unionIndex47));
+            }
+        }
+        int unionIndex48 = (decoder.readIndex());
+        if (unionIndex48 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, null);
+        } else {
+            if (unionIndex48 == 1) {
+                Utf8 charSequence48;
+                Object oldString48 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(48);
+                if (oldString48 instanceof Utf8) {
+                    charSequence48 = (decoder).readString(((Utf8) oldString48));
+                } else {
+                    charSequence48 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, charSequence48);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F48': "+ unionIndex48));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex49 = (decoder.readIndex());
+        if (unionIndex49 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, null);
+        } else {
+            if (unionIndex49 == 1) {
+                Utf8 charSequence49;
+                Object oldString49 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(49);
+                if (oldString49 instanceof Utf8) {
+                    charSequence49 = (decoder).readString(((Utf8) oldString49));
+                } else {
+                    charSequence49 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, charSequence49);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F49': "+ unionIndex49));
+            }
+        }
+        int unionIndex50 = (decoder.readIndex());
+        if (unionIndex50 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, null);
+        } else {
+            if (unionIndex50 == 1) {
+                Utf8 charSequence50;
+                Object oldString50 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(50);
+                if (oldString50 instanceof Utf8) {
+                    charSequence50 = (decoder).readString(((Utf8) oldString50));
+                } else {
+                    charSequence50 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, charSequence50);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F50': "+ unionIndex50));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex51 = (decoder.readIndex());
+        if (unionIndex51 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, null);
+        } else {
+            if (unionIndex51 == 1) {
+                Utf8 charSequence51;
+                Object oldString51 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(51);
+                if (oldString51 instanceof Utf8) {
+                    charSequence51 = (decoder).readString(((Utf8) oldString51));
+                } else {
+                    charSequence51 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, charSequence51);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F51': "+ unionIndex51));
+            }
+        }
+        int unionIndex52 = (decoder.readIndex());
+        if (unionIndex52 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, null);
+        } else {
+            if (unionIndex52 == 1) {
+                Utf8 charSequence52;
+                Object oldString52 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(52);
+                if (oldString52 instanceof Utf8) {
+                    charSequence52 = (decoder).readString(((Utf8) oldString52));
+                } else {
+                    charSequence52 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, charSequence52);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F52': "+ unionIndex52));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex53 = (decoder.readIndex());
+        if (unionIndex53 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, null);
+        } else {
+            if (unionIndex53 == 1) {
+                Utf8 charSequence53;
+                Object oldString53 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(53);
+                if (oldString53 instanceof Utf8) {
+                    charSequence53 = (decoder).readString(((Utf8) oldString53));
+                } else {
+                    charSequence53 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, charSequence53);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F53': "+ unionIndex53));
+            }
+        }
+        int unionIndex54 = (decoder.readIndex());
+        if (unionIndex54 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, null);
+        } else {
+            if (unionIndex54 == 1) {
+                Utf8 charSequence54;
+                Object oldString54 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(54);
+                if (oldString54 instanceof Utf8) {
+                    charSequence54 = (decoder).readString(((Utf8) oldString54));
+                } else {
+                    charSequence54 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, charSequence54);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F54': "+ unionIndex54));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex55 = (decoder.readIndex());
+        if (unionIndex55 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, null);
+        } else {
+            if (unionIndex55 == 1) {
+                Utf8 charSequence55;
+                Object oldString55 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(55);
+                if (oldString55 instanceof Utf8) {
+                    charSequence55 = (decoder).readString(((Utf8) oldString55));
+                } else {
+                    charSequence55 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, charSequence55);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F55': "+ unionIndex55));
+            }
+        }
+        int unionIndex56 = (decoder.readIndex());
+        if (unionIndex56 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, null);
+        } else {
+            if (unionIndex56 == 1) {
+                Utf8 charSequence56;
+                Object oldString56 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(56);
+                if (oldString56 instanceof Utf8) {
+                    charSequence56 = (decoder).readString(((Utf8) oldString56));
+                } else {
+                    charSequence56 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, charSequence56);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F56': "+ unionIndex56));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex57 = (decoder.readIndex());
+        if (unionIndex57 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, null);
+        } else {
+            if (unionIndex57 == 1) {
+                Utf8 charSequence57;
+                Object oldString57 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(57);
+                if (oldString57 instanceof Utf8) {
+                    charSequence57 = (decoder).readString(((Utf8) oldString57));
+                } else {
+                    charSequence57 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, charSequence57);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F57': "+ unionIndex57));
+            }
+        }
+        int unionIndex58 = (decoder.readIndex());
+        if (unionIndex58 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, null);
+        } else {
+            if (unionIndex58 == 1) {
+                Utf8 charSequence58;
+                Object oldString58 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(58);
+                if (oldString58 instanceof Utf8) {
+                    charSequence58 = (decoder).readString(((Utf8) oldString58));
+                } else {
+                    charSequence58 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, charSequence58);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F58': "+ unionIndex58));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex59 = (decoder.readIndex());
+        if (unionIndex59 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, null);
+        } else {
+            if (unionIndex59 == 1) {
+                Utf8 charSequence59;
+                Object oldString59 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(59);
+                if (oldString59 instanceof Utf8) {
+                    charSequence59 = (decoder).readString(((Utf8) oldString59));
+                } else {
+                    charSequence59 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, charSequence59);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F59': "+ unionIndex59));
+            }
+        }
+        int unionIndex60 = (decoder.readIndex());
+        if (unionIndex60 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, null);
+        } else {
+            if (unionIndex60 == 1) {
+                Utf8 charSequence60;
+                Object oldString60 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(60);
+                if (oldString60 instanceof Utf8) {
+                    charSequence60 = (decoder).readString(((Utf8) oldString60));
+                } else {
+                    charSequence60 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, charSequence60);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F60': "+ unionIndex60));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex61 = (decoder.readIndex());
+        if (unionIndex61 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, null);
+        } else {
+            if (unionIndex61 == 1) {
+                Utf8 charSequence61;
+                Object oldString61 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(61);
+                if (oldString61 instanceof Utf8) {
+                    charSequence61 = (decoder).readString(((Utf8) oldString61));
+                } else {
+                    charSequence61 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, charSequence61);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F61': "+ unionIndex61));
+            }
+        }
+        int unionIndex62 = (decoder.readIndex());
+        if (unionIndex62 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, null);
+        } else {
+            if (unionIndex62 == 1) {
+                Utf8 charSequence62;
+                Object oldString62 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(62);
+                if (oldString62 instanceof Utf8) {
+                    charSequence62 = (decoder).readString(((Utf8) oldString62));
+                } else {
+                    charSequence62 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, charSequence62);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F62': "+ unionIndex62));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex63 = (decoder.readIndex());
+        if (unionIndex63 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, null);
+        } else {
+            if (unionIndex63 == 1) {
+                Utf8 charSequence63;
+                Object oldString63 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(63);
+                if (oldString63 instanceof Utf8) {
+                    charSequence63 = (decoder).readString(((Utf8) oldString63));
+                } else {
+                    charSequence63 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, charSequence63);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F63': "+ unionIndex63));
+            }
+        }
+        int unionIndex64 = (decoder.readIndex());
+        if (unionIndex64 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, null);
+        } else {
+            if (unionIndex64 == 1) {
+                Utf8 charSequence64;
+                Object oldString64 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(64);
+                if (oldString64 instanceof Utf8) {
+                    charSequence64 = (decoder).readString(((Utf8) oldString64));
+                } else {
+                    charSequence64 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, charSequence64);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F64': "+ unionIndex64));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex65 = (decoder.readIndex());
+        if (unionIndex65 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, null);
+        } else {
+            if (unionIndex65 == 1) {
+                Utf8 charSequence65;
+                Object oldString65 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(65);
+                if (oldString65 instanceof Utf8) {
+                    charSequence65 = (decoder).readString(((Utf8) oldString65));
+                } else {
+                    charSequence65 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, charSequence65);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F65': "+ unionIndex65));
+            }
+        }
+        int unionIndex66 = (decoder.readIndex());
+        if (unionIndex66 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, null);
+        } else {
+            if (unionIndex66 == 1) {
+                Utf8 charSequence66;
+                Object oldString66 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(66);
+                if (oldString66 instanceof Utf8) {
+                    charSequence66 = (decoder).readString(((Utf8) oldString66));
+                } else {
+                    charSequence66 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, charSequence66);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F66': "+ unionIndex66));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex67 = (decoder.readIndex());
+        if (unionIndex67 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, null);
+        } else {
+            if (unionIndex67 == 1) {
+                Utf8 charSequence67;
+                Object oldString67 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(67);
+                if (oldString67 instanceof Utf8) {
+                    charSequence67 = (decoder).readString(((Utf8) oldString67));
+                } else {
+                    charSequence67 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, charSequence67);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F67': "+ unionIndex67));
+            }
+        }
+        int unionIndex68 = (decoder.readIndex());
+        if (unionIndex68 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, null);
+        } else {
+            if (unionIndex68 == 1) {
+                Utf8 charSequence68;
+                Object oldString68 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(68);
+                if (oldString68 instanceof Utf8) {
+                    charSequence68 = (decoder).readString(((Utf8) oldString68));
+                } else {
+                    charSequence68 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, charSequence68);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F68': "+ unionIndex68));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex69 = (decoder.readIndex());
+        if (unionIndex69 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, null);
+        } else {
+            if (unionIndex69 == 1) {
+                Utf8 charSequence69;
+                Object oldString69 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(69);
+                if (oldString69 instanceof Utf8) {
+                    charSequence69 = (decoder).readString(((Utf8) oldString69));
+                } else {
+                    charSequence69 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, charSequence69);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F69': "+ unionIndex69));
+            }
+        }
+        int unionIndex70 = (decoder.readIndex());
+        if (unionIndex70 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, null);
+        } else {
+            if (unionIndex70 == 1) {
+                Utf8 charSequence70;
+                Object oldString70 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(70);
+                if (oldString70 instanceof Utf8) {
+                    charSequence70 = (decoder).readString(((Utf8) oldString70));
+                } else {
+                    charSequence70 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, charSequence70);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F70': "+ unionIndex70));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex71 = (decoder.readIndex());
+        if (unionIndex71 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, null);
+        } else {
+            if (unionIndex71 == 1) {
+                Utf8 charSequence71;
+                Object oldString71 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(71);
+                if (oldString71 instanceof Utf8) {
+                    charSequence71 = (decoder).readString(((Utf8) oldString71));
+                } else {
+                    charSequence71 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, charSequence71);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F71': "+ unionIndex71));
+            }
+        }
+        int unionIndex72 = (decoder.readIndex());
+        if (unionIndex72 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, null);
+        } else {
+            if (unionIndex72 == 1) {
+                Utf8 charSequence72;
+                Object oldString72 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(72);
+                if (oldString72 instanceof Utf8) {
+                    charSequence72 = (decoder).readString(((Utf8) oldString72));
+                } else {
+                    charSequence72 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, charSequence72);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F72': "+ unionIndex72));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex73 = (decoder.readIndex());
+        if (unionIndex73 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, null);
+        } else {
+            if (unionIndex73 == 1) {
+                Utf8 charSequence73;
+                Object oldString73 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(73);
+                if (oldString73 instanceof Utf8) {
+                    charSequence73 = (decoder).readString(((Utf8) oldString73));
+                } else {
+                    charSequence73 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, charSequence73);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F73': "+ unionIndex73));
+            }
+        }
+        int unionIndex74 = (decoder.readIndex());
+        if (unionIndex74 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, null);
+        } else {
+            if (unionIndex74 == 1) {
+                Utf8 charSequence74;
+                Object oldString74 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(74);
+                if (oldString74 instanceof Utf8) {
+                    charSequence74 = (decoder).readString(((Utf8) oldString74));
+                } else {
+                    charSequence74 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, charSequence74);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F74': "+ unionIndex74));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex75 = (decoder.readIndex());
+        if (unionIndex75 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, null);
+        } else {
+            if (unionIndex75 == 1) {
+                Utf8 charSequence75;
+                Object oldString75 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(75);
+                if (oldString75 instanceof Utf8) {
+                    charSequence75 = (decoder).readString(((Utf8) oldString75));
+                } else {
+                    charSequence75 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, charSequence75);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F75': "+ unionIndex75));
+            }
+        }
+        int unionIndex76 = (decoder.readIndex());
+        if (unionIndex76 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, null);
+        } else {
+            if (unionIndex76 == 1) {
+                Utf8 charSequence76;
+                Object oldString76 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(76);
+                if (oldString76 instanceof Utf8) {
+                    charSequence76 = (decoder).readString(((Utf8) oldString76));
+                } else {
+                    charSequence76 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, charSequence76);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F76': "+ unionIndex76));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex77 = (decoder.readIndex());
+        if (unionIndex77 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, null);
+        } else {
+            if (unionIndex77 == 1) {
+                Utf8 charSequence77;
+                Object oldString77 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(77);
+                if (oldString77 instanceof Utf8) {
+                    charSequence77 = (decoder).readString(((Utf8) oldString77));
+                } else {
+                    charSequence77 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, charSequence77);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F77': "+ unionIndex77));
+            }
+        }
+        int unionIndex78 = (decoder.readIndex());
+        if (unionIndex78 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, null);
+        } else {
+            if (unionIndex78 == 1) {
+                Utf8 charSequence78;
+                Object oldString78 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(78);
+                if (oldString78 instanceof Utf8) {
+                    charSequence78 = (decoder).readString(((Utf8) oldString78));
+                } else {
+                    charSequence78 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, charSequence78);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F78': "+ unionIndex78));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex79 = (decoder.readIndex());
+        if (unionIndex79 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, null);
+        } else {
+            if (unionIndex79 == 1) {
+                Utf8 charSequence79;
+                Object oldString79 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(79);
+                if (oldString79 instanceof Utf8) {
+                    charSequence79 = (decoder).readString(((Utf8) oldString79));
+                } else {
+                    charSequence79 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, charSequence79);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F79': "+ unionIndex79));
+            }
+        }
+        int unionIndex80 = (decoder.readIndex());
+        if (unionIndex80 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, null);
+        } else {
+            if (unionIndex80 == 1) {
+                Utf8 charSequence80;
+                Object oldString80 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(80);
+                if (oldString80 instanceof Utf8) {
+                    charSequence80 = (decoder).readString(((Utf8) oldString80));
+                } else {
+                    charSequence80 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, charSequence80);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F80': "+ unionIndex80));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex81 = (decoder.readIndex());
+        if (unionIndex81 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, null);
+        } else {
+            if (unionIndex81 == 1) {
+                Utf8 charSequence81;
+                Object oldString81 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(81);
+                if (oldString81 instanceof Utf8) {
+                    charSequence81 = (decoder).readString(((Utf8) oldString81));
+                } else {
+                    charSequence81 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, charSequence81);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F81': "+ unionIndex81));
+            }
+        }
+        int unionIndex82 = (decoder.readIndex());
+        if (unionIndex82 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, null);
+        } else {
+            if (unionIndex82 == 1) {
+                Utf8 charSequence82;
+                Object oldString82 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(82);
+                if (oldString82 instanceof Utf8) {
+                    charSequence82 = (decoder).readString(((Utf8) oldString82));
+                } else {
+                    charSequence82 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, charSequence82);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F82': "+ unionIndex82));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex83 = (decoder.readIndex());
+        if (unionIndex83 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, null);
+        } else {
+            if (unionIndex83 == 1) {
+                Utf8 charSequence83;
+                Object oldString83 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(83);
+                if (oldString83 instanceof Utf8) {
+                    charSequence83 = (decoder).readString(((Utf8) oldString83));
+                } else {
+                    charSequence83 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, charSequence83);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F83': "+ unionIndex83));
+            }
+        }
+        int unionIndex84 = (decoder.readIndex());
+        if (unionIndex84 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, null);
+        } else {
+            if (unionIndex84 == 1) {
+                Utf8 charSequence84;
+                Object oldString84 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(84);
+                if (oldString84 instanceof Utf8) {
+                    charSequence84 = (decoder).readString(((Utf8) oldString84));
+                } else {
+                    charSequence84 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, charSequence84);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F84': "+ unionIndex84));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex85 = (decoder.readIndex());
+        if (unionIndex85 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, null);
+        } else {
+            if (unionIndex85 == 1) {
+                Utf8 charSequence85;
+                Object oldString85 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(85);
+                if (oldString85 instanceof Utf8) {
+                    charSequence85 = (decoder).readString(((Utf8) oldString85));
+                } else {
+                    charSequence85 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, charSequence85);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F85': "+ unionIndex85));
+            }
+        }
+        int unionIndex86 = (decoder.readIndex());
+        if (unionIndex86 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, null);
+        } else {
+            if (unionIndex86 == 1) {
+                Utf8 charSequence86;
+                Object oldString86 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(86);
+                if (oldString86 instanceof Utf8) {
+                    charSequence86 = (decoder).readString(((Utf8) oldString86));
+                } else {
+                    charSequence86 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, charSequence86);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F86': "+ unionIndex86));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex87 = (decoder.readIndex());
+        if (unionIndex87 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, null);
+        } else {
+            if (unionIndex87 == 1) {
+                Utf8 charSequence87;
+                Object oldString87 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(87);
+                if (oldString87 instanceof Utf8) {
+                    charSequence87 = (decoder).readString(((Utf8) oldString87));
+                } else {
+                    charSequence87 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, charSequence87);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F87': "+ unionIndex87));
+            }
+        }
+        int unionIndex88 = (decoder.readIndex());
+        if (unionIndex88 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, null);
+        } else {
+            if (unionIndex88 == 1) {
+                Utf8 charSequence88;
+                Object oldString88 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(88);
+                if (oldString88 instanceof Utf8) {
+                    charSequence88 = (decoder).readString(((Utf8) oldString88));
+                } else {
+                    charSequence88 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, charSequence88);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F88': "+ unionIndex88));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex89 = (decoder.readIndex());
+        if (unionIndex89 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, null);
+        } else {
+            if (unionIndex89 == 1) {
+                Utf8 charSequence89;
+                Object oldString89 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(89);
+                if (oldString89 instanceof Utf8) {
+                    charSequence89 = (decoder).readString(((Utf8) oldString89));
+                } else {
+                    charSequence89 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, charSequence89);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F89': "+ unionIndex89));
+            }
+        }
+        int unionIndex90 = (decoder.readIndex());
+        if (unionIndex90 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, null);
+        } else {
+            if (unionIndex90 == 1) {
+                Utf8 charSequence90;
+                Object oldString90 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(90);
+                if (oldString90 instanceof Utf8) {
+                    charSequence90 = (decoder).readString(((Utf8) oldString90));
+                } else {
+                    charSequence90 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, charSequence90);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F90': "+ unionIndex90));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex91 = (decoder.readIndex());
+        if (unionIndex91 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, null);
+        } else {
+            if (unionIndex91 == 1) {
+                Utf8 charSequence91;
+                Object oldString91 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(91);
+                if (oldString91 instanceof Utf8) {
+                    charSequence91 = (decoder).readString(((Utf8) oldString91));
+                } else {
+                    charSequence91 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, charSequence91);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F91': "+ unionIndex91));
+            }
+        }
+        int unionIndex92 = (decoder.readIndex());
+        if (unionIndex92 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, null);
+        } else {
+            if (unionIndex92 == 1) {
+                Utf8 charSequence92;
+                Object oldString92 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(92);
+                if (oldString92 instanceof Utf8) {
+                    charSequence92 = (decoder).readString(((Utf8) oldString92));
+                } else {
+                    charSequence92 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, charSequence92);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F92': "+ unionIndex92));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex93 = (decoder.readIndex());
+        if (unionIndex93 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, null);
+        } else {
+            if (unionIndex93 == 1) {
+                Utf8 charSequence93;
+                Object oldString93 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(93);
+                if (oldString93 instanceof Utf8) {
+                    charSequence93 = (decoder).readString(((Utf8) oldString93));
+                } else {
+                    charSequence93 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, charSequence93);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F93': "+ unionIndex93));
+            }
+        }
+        int unionIndex94 = (decoder.readIndex());
+        if (unionIndex94 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, null);
+        } else {
+            if (unionIndex94 == 1) {
+                Utf8 charSequence94;
+                Object oldString94 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(94);
+                if (oldString94 instanceof Utf8) {
+                    charSequence94 = (decoder).readString(((Utf8) oldString94));
+                } else {
+                    charSequence94 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, charSequence94);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F94': "+ unionIndex94));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex95 = (decoder.readIndex());
+        if (unionIndex95 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, null);
+        } else {
+            if (unionIndex95 == 1) {
+                Utf8 charSequence95;
+                Object oldString95 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(95);
+                if (oldString95 instanceof Utf8) {
+                    charSequence95 = (decoder).readString(((Utf8) oldString95));
+                } else {
+                    charSequence95 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, charSequence95);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F95': "+ unionIndex95));
+            }
+        }
+        int unionIndex96 = (decoder.readIndex());
+        if (unionIndex96 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, null);
+        } else {
+            if (unionIndex96 == 1) {
+                Utf8 charSequence96;
+                Object oldString96 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(96);
+                if (oldString96 instanceof Utf8) {
+                    charSequence96 = (decoder).readString(((Utf8) oldString96));
+                } else {
+                    charSequence96 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, charSequence96);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F96': "+ unionIndex96));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex97 = (decoder.readIndex());
+        if (unionIndex97 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, null);
+        } else {
+            if (unionIndex97 == 1) {
+                Utf8 charSequence97;
+                Object oldString97 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(97);
+                if (oldString97 instanceof Utf8) {
+                    charSequence97 = (decoder).readString(((Utf8) oldString97));
+                } else {
+                    charSequence97 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, charSequence97);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F97': "+ unionIndex97));
+            }
+        }
+        int unionIndex98 = (decoder.readIndex());
+        if (unionIndex98 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, null);
+        } else {
+            if (unionIndex98 == 1) {
+                Utf8 charSequence98;
+                Object oldString98 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(98);
+                if (oldString98 instanceof Utf8) {
+                    charSequence98 = (decoder).readString(((Utf8) oldString98));
+                } else {
+                    charSequence98 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, charSequence98);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F98': "+ unionIndex98));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex99 = (decoder.readIndex());
+        if (unionIndex99 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, null);
+        } else {
+            if (unionIndex99 == 1) {
+                Utf8 charSequence99;
+                Object oldString99 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(99);
+                if (oldString99 instanceof Utf8) {
+                    charSequence99 = (decoder).readString(((Utf8) oldString99));
+                } else {
+                    charSequence99 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, charSequence99);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F99': "+ unionIndex99));
+            }
+        }
+        int unionIndex100 = (decoder.readIndex());
+        if (unionIndex100 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, null);
+        } else {
+            if (unionIndex100 == 1) {
+                Utf8 charSequence100;
+                Object oldString100 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(100);
+                if (oldString100 instanceof Utf8) {
+                    charSequence100 = (decoder).readString(((Utf8) oldString100));
+                } else {
+                    charSequence100 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, charSequence100);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F100': "+ unionIndex100));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex101 = (decoder.readIndex());
+        if (unionIndex101 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, null);
+        } else {
+            if (unionIndex101 == 1) {
+                Utf8 charSequence101;
+                Object oldString101 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(101);
+                if (oldString101 instanceof Utf8) {
+                    charSequence101 = (decoder).readString(((Utf8) oldString101));
+                } else {
+                    charSequence101 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, charSequence101);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F101': "+ unionIndex101));
+            }
+        }
+        int unionIndex102 = (decoder.readIndex());
+        if (unionIndex102 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, null);
+        } else {
+            if (unionIndex102 == 1) {
+                Utf8 charSequence102;
+                Object oldString102 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(102);
+                if (oldString102 instanceof Utf8) {
+                    charSequence102 = (decoder).readString(((Utf8) oldString102));
+                } else {
+                    charSequence102 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, charSequence102);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F102': "+ unionIndex102));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex103 = (decoder.readIndex());
+        if (unionIndex103 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, null);
+        } else {
+            if (unionIndex103 == 1) {
+                Utf8 charSequence103;
+                Object oldString103 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(103);
+                if (oldString103 instanceof Utf8) {
+                    charSequence103 = (decoder).readString(((Utf8) oldString103));
+                } else {
+                    charSequence103 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, charSequence103);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F103': "+ unionIndex103));
+            }
+        }
+        int unionIndex104 = (decoder.readIndex());
+        if (unionIndex104 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, null);
+        } else {
+            if (unionIndex104 == 1) {
+                Utf8 charSequence104;
+                Object oldString104 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(104);
+                if (oldString104 instanceof Utf8) {
+                    charSequence104 = (decoder).readString(((Utf8) oldString104));
+                } else {
+                    charSequence104 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, charSequence104);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F104': "+ unionIndex104));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex105 = (decoder.readIndex());
+        if (unionIndex105 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, null);
+        } else {
+            if (unionIndex105 == 1) {
+                Utf8 charSequence105;
+                Object oldString105 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(105);
+                if (oldString105 instanceof Utf8) {
+                    charSequence105 = (decoder).readString(((Utf8) oldString105));
+                } else {
+                    charSequence105 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, charSequence105);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F105': "+ unionIndex105));
+            }
+        }
+        int unionIndex106 = (decoder.readIndex());
+        if (unionIndex106 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, null);
+        } else {
+            if (unionIndex106 == 1) {
+                Utf8 charSequence106;
+                Object oldString106 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(106);
+                if (oldString106 instanceof Utf8) {
+                    charSequence106 = (decoder).readString(((Utf8) oldString106));
+                } else {
+                    charSequence106 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, charSequence106);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F106': "+ unionIndex106));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex107 = (decoder.readIndex());
+        if (unionIndex107 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, null);
+        } else {
+            if (unionIndex107 == 1) {
+                Utf8 charSequence107;
+                Object oldString107 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(107);
+                if (oldString107 instanceof Utf8) {
+                    charSequence107 = (decoder).readString(((Utf8) oldString107));
+                } else {
+                    charSequence107 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, charSequence107);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F107': "+ unionIndex107));
+            }
+        }
+        int unionIndex108 = (decoder.readIndex());
+        if (unionIndex108 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, null);
+        } else {
+            if (unionIndex108 == 1) {
+                Utf8 charSequence108;
+                Object oldString108 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(108);
+                if (oldString108 instanceof Utf8) {
+                    charSequence108 = (decoder).readString(((Utf8) oldString108));
+                } else {
+                    charSequence108 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, charSequence108);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F108': "+ unionIndex108));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex109 = (decoder.readIndex());
+        if (unionIndex109 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, null);
+        } else {
+            if (unionIndex109 == 1) {
+                Utf8 charSequence109;
+                Object oldString109 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(109);
+                if (oldString109 instanceof Utf8) {
+                    charSequence109 = (decoder).readString(((Utf8) oldString109));
+                } else {
+                    charSequence109 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, charSequence109);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F109': "+ unionIndex109));
+            }
+        }
+        int unionIndex110 = (decoder.readIndex());
+        if (unionIndex110 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, null);
+        } else {
+            if (unionIndex110 == 1) {
+                Utf8 charSequence110;
+                Object oldString110 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(110);
+                if (oldString110 instanceof Utf8) {
+                    charSequence110 = (decoder).readString(((Utf8) oldString110));
+                } else {
+                    charSequence110 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, charSequence110);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F110': "+ unionIndex110));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex111 = (decoder.readIndex());
+        if (unionIndex111 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, null);
+        } else {
+            if (unionIndex111 == 1) {
+                Utf8 charSequence111;
+                Object oldString111 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(111);
+                if (oldString111 instanceof Utf8) {
+                    charSequence111 = (decoder).readString(((Utf8) oldString111));
+                } else {
+                    charSequence111 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, charSequence111);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F111': "+ unionIndex111));
+            }
+        }
+        int unionIndex112 = (decoder.readIndex());
+        if (unionIndex112 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, null);
+        } else {
+            if (unionIndex112 == 1) {
+                Utf8 charSequence112;
+                Object oldString112 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(112);
+                if (oldString112 instanceof Utf8) {
+                    charSequence112 = (decoder).readString(((Utf8) oldString112));
+                } else {
+                    charSequence112 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, charSequence112);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F112': "+ unionIndex112));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex113 = (decoder.readIndex());
+        if (unionIndex113 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, null);
+        } else {
+            if (unionIndex113 == 1) {
+                Utf8 charSequence113;
+                Object oldString113 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(113);
+                if (oldString113 instanceof Utf8) {
+                    charSequence113 = (decoder).readString(((Utf8) oldString113));
+                } else {
+                    charSequence113 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, charSequence113);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F113': "+ unionIndex113));
+            }
+        }
+        int unionIndex114 = (decoder.readIndex());
+        if (unionIndex114 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, null);
+        } else {
+            if (unionIndex114 == 1) {
+                Utf8 charSequence114;
+                Object oldString114 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(114);
+                if (oldString114 instanceof Utf8) {
+                    charSequence114 = (decoder).readString(((Utf8) oldString114));
+                } else {
+                    charSequence114 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, charSequence114);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F114': "+ unionIndex114));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex115 = (decoder.readIndex());
+        if (unionIndex115 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, null);
+        } else {
+            if (unionIndex115 == 1) {
+                Utf8 charSequence115;
+                Object oldString115 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(115);
+                if (oldString115 instanceof Utf8) {
+                    charSequence115 = (decoder).readString(((Utf8) oldString115));
+                } else {
+                    charSequence115 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, charSequence115);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F115': "+ unionIndex115));
+            }
+        }
+        int unionIndex116 = (decoder.readIndex());
+        if (unionIndex116 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, null);
+        } else {
+            if (unionIndex116 == 1) {
+                Utf8 charSequence116;
+                Object oldString116 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(116);
+                if (oldString116 instanceof Utf8) {
+                    charSequence116 = (decoder).readString(((Utf8) oldString116));
+                } else {
+                    charSequence116 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, charSequence116);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F116': "+ unionIndex116));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex117 = (decoder.readIndex());
+        if (unionIndex117 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, null);
+        } else {
+            if (unionIndex117 == 1) {
+                Utf8 charSequence117;
+                Object oldString117 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(117);
+                if (oldString117 instanceof Utf8) {
+                    charSequence117 = (decoder).readString(((Utf8) oldString117));
+                } else {
+                    charSequence117 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, charSequence117);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F117': "+ unionIndex117));
+            }
+        }
+        int unionIndex118 = (decoder.readIndex());
+        if (unionIndex118 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, null);
+        } else {
+            if (unionIndex118 == 1) {
+                Utf8 charSequence118;
+                Object oldString118 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(118);
+                if (oldString118 instanceof Utf8) {
+                    charSequence118 = (decoder).readString(((Utf8) oldString118));
+                } else {
+                    charSequence118 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, charSequence118);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F118': "+ unionIndex118));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex119 = (decoder.readIndex());
+        if (unionIndex119 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, null);
+        } else {
+            if (unionIndex119 == 1) {
+                Utf8 charSequence119;
+                Object oldString119 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(119);
+                if (oldString119 instanceof Utf8) {
+                    charSequence119 = (decoder).readString(((Utf8) oldString119));
+                } else {
+                    charSequence119 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, charSequence119);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F119': "+ unionIndex119));
+            }
+        }
+        int unionIndex120 = (decoder.readIndex());
+        if (unionIndex120 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, null);
+        } else {
+            if (unionIndex120 == 1) {
+                Utf8 charSequence120;
+                Object oldString120 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(120);
+                if (oldString120 instanceof Utf8) {
+                    charSequence120 = (decoder).readString(((Utf8) oldString120));
+                } else {
+                    charSequence120 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, charSequence120);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F120': "+ unionIndex120));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex121 = (decoder.readIndex());
+        if (unionIndex121 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, null);
+        } else {
+            if (unionIndex121 == 1) {
+                Utf8 charSequence121;
+                Object oldString121 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(121);
+                if (oldString121 instanceof Utf8) {
+                    charSequence121 = (decoder).readString(((Utf8) oldString121));
+                } else {
+                    charSequence121 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, charSequence121);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F121': "+ unionIndex121));
+            }
+        }
+        int unionIndex122 = (decoder.readIndex());
+        if (unionIndex122 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, null);
+        } else {
+            if (unionIndex122 == 1) {
+                Utf8 charSequence122;
+                Object oldString122 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(122);
+                if (oldString122 instanceof Utf8) {
+                    charSequence122 = (decoder).readString(((Utf8) oldString122));
+                } else {
+                    charSequence122 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, charSequence122);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F122': "+ unionIndex122));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex123 = (decoder.readIndex());
+        if (unionIndex123 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, null);
+        } else {
+            if (unionIndex123 == 1) {
+                Utf8 charSequence123;
+                Object oldString123 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(123);
+                if (oldString123 instanceof Utf8) {
+                    charSequence123 = (decoder).readString(((Utf8) oldString123));
+                } else {
+                    charSequence123 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, charSequence123);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F123': "+ unionIndex123));
+            }
+        }
+        int unionIndex124 = (decoder.readIndex());
+        if (unionIndex124 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, null);
+        } else {
+            if (unionIndex124 == 1) {
+                Utf8 charSequence124;
+                Object oldString124 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(124);
+                if (oldString124 instanceof Utf8) {
+                    charSequence124 = (decoder).readString(((Utf8) oldString124));
+                } else {
+                    charSequence124 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, charSequence124);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F124': "+ unionIndex124));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex125 = (decoder.readIndex());
+        if (unionIndex125 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, null);
+        } else {
+            if (unionIndex125 == 1) {
+                Utf8 charSequence125;
+                Object oldString125 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(125);
+                if (oldString125 instanceof Utf8) {
+                    charSequence125 = (decoder).readString(((Utf8) oldString125));
+                } else {
+                    charSequence125 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, charSequence125);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F125': "+ unionIndex125));
+            }
+        }
+        int unionIndex126 = (decoder.readIndex());
+        if (unionIndex126 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, null);
+        } else {
+            if (unionIndex126 == 1) {
+                Utf8 charSequence126;
+                Object oldString126 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(126);
+                if (oldString126 instanceof Utf8) {
+                    charSequence126 = (decoder).readString(((Utf8) oldString126));
+                } else {
+                    charSequence126 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, charSequence126);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F126': "+ unionIndex126));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex127 = (decoder.readIndex());
+        if (unionIndex127 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, null);
+        } else {
+            if (unionIndex127 == 1) {
+                Utf8 charSequence127;
+                Object oldString127 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(127);
+                if (oldString127 instanceof Utf8) {
+                    charSequence127 = (decoder).readString(((Utf8) oldString127));
+                } else {
+                    charSequence127 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, charSequence127);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F127': "+ unionIndex127));
+            }
+        }
+        int unionIndex128 = (decoder.readIndex());
+        if (unionIndex128 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, null);
+        } else {
+            if (unionIndex128 == 1) {
+                Utf8 charSequence128;
+                Object oldString128 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(128);
+                if (oldString128 instanceof Utf8) {
+                    charSequence128 = (decoder).readString(((Utf8) oldString128));
+                } else {
+                    charSequence128 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, charSequence128);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F128': "+ unionIndex128));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex129 = (decoder.readIndex());
+        if (unionIndex129 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, null);
+        } else {
+            if (unionIndex129 == 1) {
+                Utf8 charSequence129;
+                Object oldString129 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(129);
+                if (oldString129 instanceof Utf8) {
+                    charSequence129 = (decoder).readString(((Utf8) oldString129));
+                } else {
+                    charSequence129 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, charSequence129);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F129': "+ unionIndex129));
+            }
+        }
+        int unionIndex130 = (decoder.readIndex());
+        if (unionIndex130 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, null);
+        } else {
+            if (unionIndex130 == 1) {
+                Utf8 charSequence130;
+                Object oldString130 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(130);
+                if (oldString130 instanceof Utf8) {
+                    charSequence130 = (decoder).readString(((Utf8) oldString130));
+                } else {
+                    charSequence130 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, charSequence130);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F130': "+ unionIndex130));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex131 = (decoder.readIndex());
+        if (unionIndex131 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, null);
+        } else {
+            if (unionIndex131 == 1) {
+                Utf8 charSequence131;
+                Object oldString131 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(131);
+                if (oldString131 instanceof Utf8) {
+                    charSequence131 = (decoder).readString(((Utf8) oldString131));
+                } else {
+                    charSequence131 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, charSequence131);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F131': "+ unionIndex131));
+            }
+        }
+        int unionIndex132 = (decoder.readIndex());
+        if (unionIndex132 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, null);
+        } else {
+            if (unionIndex132 == 1) {
+                Utf8 charSequence132;
+                Object oldString132 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(132);
+                if (oldString132 instanceof Utf8) {
+                    charSequence132 = (decoder).readString(((Utf8) oldString132));
+                } else {
+                    charSequence132 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, charSequence132);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F132': "+ unionIndex132));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex133 = (decoder.readIndex());
+        if (unionIndex133 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, null);
+        } else {
+            if (unionIndex133 == 1) {
+                Utf8 charSequence133;
+                Object oldString133 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(133);
+                if (oldString133 instanceof Utf8) {
+                    charSequence133 = (decoder).readString(((Utf8) oldString133));
+                } else {
+                    charSequence133 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, charSequence133);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F133': "+ unionIndex133));
+            }
+        }
+        int unionIndex134 = (decoder.readIndex());
+        if (unionIndex134 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, null);
+        } else {
+            if (unionIndex134 == 1) {
+                Utf8 charSequence134;
+                Object oldString134 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(134);
+                if (oldString134 instanceof Utf8) {
+                    charSequence134 = (decoder).readString(((Utf8) oldString134));
+                } else {
+                    charSequence134 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, charSequence134);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F134': "+ unionIndex134));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex135 = (decoder.readIndex());
+        if (unionIndex135 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, null);
+        } else {
+            if (unionIndex135 == 1) {
+                Utf8 charSequence135;
+                Object oldString135 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(135);
+                if (oldString135 instanceof Utf8) {
+                    charSequence135 = (decoder).readString(((Utf8) oldString135));
+                } else {
+                    charSequence135 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, charSequence135);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F135': "+ unionIndex135));
+            }
+        }
+        int unionIndex136 = (decoder.readIndex());
+        if (unionIndex136 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, null);
+        } else {
+            if (unionIndex136 == 1) {
+                Utf8 charSequence136;
+                Object oldString136 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(136);
+                if (oldString136 instanceof Utf8) {
+                    charSequence136 = (decoder).readString(((Utf8) oldString136));
+                } else {
+                    charSequence136 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, charSequence136);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F136': "+ unionIndex136));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex137 = (decoder.readIndex());
+        if (unionIndex137 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, null);
+        } else {
+            if (unionIndex137 == 1) {
+                Utf8 charSequence137;
+                Object oldString137 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(137);
+                if (oldString137 instanceof Utf8) {
+                    charSequence137 = (decoder).readString(((Utf8) oldString137));
+                } else {
+                    charSequence137 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, charSequence137);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F137': "+ unionIndex137));
+            }
+        }
+        int unionIndex138 = (decoder.readIndex());
+        if (unionIndex138 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, null);
+        } else {
+            if (unionIndex138 == 1) {
+                Utf8 charSequence138;
+                Object oldString138 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(138);
+                if (oldString138 instanceof Utf8) {
+                    charSequence138 = (decoder).readString(((Utf8) oldString138));
+                } else {
+                    charSequence138 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, charSequence138);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F138': "+ unionIndex138));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex139 = (decoder.readIndex());
+        if (unionIndex139 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, null);
+        } else {
+            if (unionIndex139 == 1) {
+                Utf8 charSequence139;
+                Object oldString139 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(139);
+                if (oldString139 instanceof Utf8) {
+                    charSequence139 = (decoder).readString(((Utf8) oldString139));
+                } else {
+                    charSequence139 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, charSequence139);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F139': "+ unionIndex139));
+            }
+        }
+        int unionIndex140 = (decoder.readIndex());
+        if (unionIndex140 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, null);
+        } else {
+            if (unionIndex140 == 1) {
+                Utf8 charSequence140;
+                Object oldString140 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(140);
+                if (oldString140 instanceof Utf8) {
+                    charSequence140 = (decoder).readString(((Utf8) oldString140));
+                } else {
+                    charSequence140 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, charSequence140);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F140': "+ unionIndex140));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex141 = (decoder.readIndex());
+        if (unionIndex141 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, null);
+        } else {
+            if (unionIndex141 == 1) {
+                Utf8 charSequence141;
+                Object oldString141 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(141);
+                if (oldString141 instanceof Utf8) {
+                    charSequence141 = (decoder).readString(((Utf8) oldString141));
+                } else {
+                    charSequence141 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, charSequence141);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F141': "+ unionIndex141));
+            }
+        }
+        int unionIndex142 = (decoder.readIndex());
+        if (unionIndex142 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, null);
+        } else {
+            if (unionIndex142 == 1) {
+                Utf8 charSequence142;
+                Object oldString142 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(142);
+                if (oldString142 instanceof Utf8) {
+                    charSequence142 = (decoder).readString(((Utf8) oldString142));
+                } else {
+                    charSequence142 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, charSequence142);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F142': "+ unionIndex142));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex143 = (decoder.readIndex());
+        if (unionIndex143 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, null);
+        } else {
+            if (unionIndex143 == 1) {
+                Utf8 charSequence143;
+                Object oldString143 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(143);
+                if (oldString143 instanceof Utf8) {
+                    charSequence143 = (decoder).readString(((Utf8) oldString143));
+                } else {
+                    charSequence143 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, charSequence143);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F143': "+ unionIndex143));
+            }
+        }
+        int unionIndex144 = (decoder.readIndex());
+        if (unionIndex144 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, null);
+        } else {
+            if (unionIndex144 == 1) {
+                Utf8 charSequence144;
+                Object oldString144 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(144);
+                if (oldString144 instanceof Utf8) {
+                    charSequence144 = (decoder).readString(((Utf8) oldString144));
+                } else {
+                    charSequence144 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, charSequence144);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F144': "+ unionIndex144));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex145 = (decoder.readIndex());
+        if (unionIndex145 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, null);
+        } else {
+            if (unionIndex145 == 1) {
+                Utf8 charSequence145;
+                Object oldString145 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(145);
+                if (oldString145 instanceof Utf8) {
+                    charSequence145 = (decoder).readString(((Utf8) oldString145));
+                } else {
+                    charSequence145 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, charSequence145);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F145': "+ unionIndex145));
+            }
+        }
+        int unionIndex146 = (decoder.readIndex());
+        if (unionIndex146 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, null);
+        } else {
+            if (unionIndex146 == 1) {
+                Utf8 charSequence146;
+                Object oldString146 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(146);
+                if (oldString146 instanceof Utf8) {
+                    charSequence146 = (decoder).readString(((Utf8) oldString146));
+                } else {
+                    charSequence146 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, charSequence146);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F146': "+ unionIndex146));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex147 = (decoder.readIndex());
+        if (unionIndex147 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, null);
+        } else {
+            if (unionIndex147 == 1) {
+                Utf8 charSequence147;
+                Object oldString147 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(147);
+                if (oldString147 instanceof Utf8) {
+                    charSequence147 = (decoder).readString(((Utf8) oldString147));
+                } else {
+                    charSequence147 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, charSequence147);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F147': "+ unionIndex147));
+            }
+        }
+        int unionIndex148 = (decoder.readIndex());
+        if (unionIndex148 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, null);
+        } else {
+            if (unionIndex148 == 1) {
+                Utf8 charSequence148;
+                Object oldString148 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(148);
+                if (oldString148 instanceof Utf8) {
+                    charSequence148 = (decoder).readString(((Utf8) oldString148));
+                } else {
+                    charSequence148 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, charSequence148);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F148': "+ unionIndex148));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex149 = (decoder.readIndex());
+        if (unionIndex149 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, null);
+        } else {
+            if (unionIndex149 == 1) {
+                Utf8 charSequence149;
+                Object oldString149 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(149);
+                if (oldString149 instanceof Utf8) {
+                    charSequence149 = (decoder).readString(((Utf8) oldString149));
+                } else {
+                    charSequence149 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, charSequence149);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F149': "+ unionIndex149));
+            }
+        }
+        int unionIndex150 = (decoder.readIndex());
+        if (unionIndex150 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, null);
+        } else {
+            if (unionIndex150 == 1) {
+                Utf8 charSequence150;
+                Object oldString150 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(150);
+                if (oldString150 instanceof Utf8) {
+                    charSequence150 = (decoder).readString(((Utf8) oldString150));
+                } else {
+                    charSequence150 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, charSequence150);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F150': "+ unionIndex150));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex151 = (decoder.readIndex());
+        if (unionIndex151 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, null);
+        } else {
+            if (unionIndex151 == 1) {
+                Utf8 charSequence151;
+                Object oldString151 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(151);
+                if (oldString151 instanceof Utf8) {
+                    charSequence151 = (decoder).readString(((Utf8) oldString151));
+                } else {
+                    charSequence151 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, charSequence151);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F151': "+ unionIndex151));
+            }
+        }
+        int unionIndex152 = (decoder.readIndex());
+        if (unionIndex152 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, null);
+        } else {
+            if (unionIndex152 == 1) {
+                Utf8 charSequence152;
+                Object oldString152 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(152);
+                if (oldString152 instanceof Utf8) {
+                    charSequence152 = (decoder).readString(((Utf8) oldString152));
+                } else {
+                    charSequence152 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, charSequence152);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F152': "+ unionIndex152));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex153 = (decoder.readIndex());
+        if (unionIndex153 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, null);
+        } else {
+            if (unionIndex153 == 1) {
+                Utf8 charSequence153;
+                Object oldString153 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(153);
+                if (oldString153 instanceof Utf8) {
+                    charSequence153 = (decoder).readString(((Utf8) oldString153));
+                } else {
+                    charSequence153 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, charSequence153);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F153': "+ unionIndex153));
+            }
+        }
+        int unionIndex154 = (decoder.readIndex());
+        if (unionIndex154 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, null);
+        } else {
+            if (unionIndex154 == 1) {
+                Utf8 charSequence154;
+                Object oldString154 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(154);
+                if (oldString154 instanceof Utf8) {
+                    charSequence154 = (decoder).readString(((Utf8) oldString154));
+                } else {
+                    charSequence154 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, charSequence154);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F154': "+ unionIndex154));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex155 = (decoder.readIndex());
+        if (unionIndex155 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, null);
+        } else {
+            if (unionIndex155 == 1) {
+                Utf8 charSequence155;
+                Object oldString155 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(155);
+                if (oldString155 instanceof Utf8) {
+                    charSequence155 = (decoder).readString(((Utf8) oldString155));
+                } else {
+                    charSequence155 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, charSequence155);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F155': "+ unionIndex155));
+            }
+        }
+        int unionIndex156 = (decoder.readIndex());
+        if (unionIndex156 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, null);
+        } else {
+            if (unionIndex156 == 1) {
+                Utf8 charSequence156;
+                Object oldString156 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(156);
+                if (oldString156 instanceof Utf8) {
+                    charSequence156 = (decoder).readString(((Utf8) oldString156));
+                } else {
+                    charSequence156 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, charSequence156);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F156': "+ unionIndex156));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex157 = (decoder.readIndex());
+        if (unionIndex157 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, null);
+        } else {
+            if (unionIndex157 == 1) {
+                Utf8 charSequence157;
+                Object oldString157 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(157);
+                if (oldString157 instanceof Utf8) {
+                    charSequence157 = (decoder).readString(((Utf8) oldString157));
+                } else {
+                    charSequence157 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, charSequence157);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F157': "+ unionIndex157));
+            }
+        }
+        int unionIndex158 = (decoder.readIndex());
+        if (unionIndex158 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, null);
+        } else {
+            if (unionIndex158 == 1) {
+                Utf8 charSequence158;
+                Object oldString158 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(158);
+                if (oldString158 instanceof Utf8) {
+                    charSequence158 = (decoder).readString(((Utf8) oldString158));
+                } else {
+                    charSequence158 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, charSequence158);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F158': "+ unionIndex158));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex159 = (decoder.readIndex());
+        if (unionIndex159 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, null);
+        } else {
+            if (unionIndex159 == 1) {
+                Utf8 charSequence159;
+                Object oldString159 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(159);
+                if (oldString159 instanceof Utf8) {
+                    charSequence159 = (decoder).readString(((Utf8) oldString159));
+                } else {
+                    charSequence159 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, charSequence159);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F159': "+ unionIndex159));
+            }
+        }
+        int unionIndex160 = (decoder.readIndex());
+        if (unionIndex160 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, null);
+        } else {
+            if (unionIndex160 == 1) {
+                Utf8 charSequence160;
+                Object oldString160 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(160);
+                if (oldString160 instanceof Utf8) {
+                    charSequence160 = (decoder).readString(((Utf8) oldString160));
+                } else {
+                    charSequence160 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, charSequence160);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F160': "+ unionIndex160));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex161 = (decoder.readIndex());
+        if (unionIndex161 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, null);
+        } else {
+            if (unionIndex161 == 1) {
+                Utf8 charSequence161;
+                Object oldString161 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(161);
+                if (oldString161 instanceof Utf8) {
+                    charSequence161 = (decoder).readString(((Utf8) oldString161));
+                } else {
+                    charSequence161 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, charSequence161);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F161': "+ unionIndex161));
+            }
+        }
+        int unionIndex162 = (decoder.readIndex());
+        if (unionIndex162 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, null);
+        } else {
+            if (unionIndex162 == 1) {
+                Utf8 charSequence162;
+                Object oldString162 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(162);
+                if (oldString162 instanceof Utf8) {
+                    charSequence162 = (decoder).readString(((Utf8) oldString162));
+                } else {
+                    charSequence162 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, charSequence162);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F162': "+ unionIndex162));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex163 = (decoder.readIndex());
+        if (unionIndex163 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, null);
+        } else {
+            if (unionIndex163 == 1) {
+                Utf8 charSequence163;
+                Object oldString163 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(163);
+                if (oldString163 instanceof Utf8) {
+                    charSequence163 = (decoder).readString(((Utf8) oldString163));
+                } else {
+                    charSequence163 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, charSequence163);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F163': "+ unionIndex163));
+            }
+        }
+        int unionIndex164 = (decoder.readIndex());
+        if (unionIndex164 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, null);
+        } else {
+            if (unionIndex164 == 1) {
+                Utf8 charSequence164;
+                Object oldString164 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(164);
+                if (oldString164 instanceof Utf8) {
+                    charSequence164 = (decoder).readString(((Utf8) oldString164));
+                } else {
+                    charSequence164 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, charSequence164);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F164': "+ unionIndex164));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex165 = (decoder.readIndex());
+        if (unionIndex165 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, null);
+        } else {
+            if (unionIndex165 == 1) {
+                Utf8 charSequence165;
+                Object oldString165 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(165);
+                if (oldString165 instanceof Utf8) {
+                    charSequence165 = (decoder).readString(((Utf8) oldString165));
+                } else {
+                    charSequence165 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, charSequence165);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F165': "+ unionIndex165));
+            }
+        }
+        int unionIndex166 = (decoder.readIndex());
+        if (unionIndex166 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, null);
+        } else {
+            if (unionIndex166 == 1) {
+                Utf8 charSequence166;
+                Object oldString166 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(166);
+                if (oldString166 instanceof Utf8) {
+                    charSequence166 = (decoder).readString(((Utf8) oldString166));
+                } else {
+                    charSequence166 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, charSequence166);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F166': "+ unionIndex166));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex167 = (decoder.readIndex());
+        if (unionIndex167 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, null);
+        } else {
+            if (unionIndex167 == 1) {
+                Utf8 charSequence167;
+                Object oldString167 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(167);
+                if (oldString167 instanceof Utf8) {
+                    charSequence167 = (decoder).readString(((Utf8) oldString167));
+                } else {
+                    charSequence167 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, charSequence167);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F167': "+ unionIndex167));
+            }
+        }
+        int unionIndex168 = (decoder.readIndex());
+        if (unionIndex168 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, null);
+        } else {
+            if (unionIndex168 == 1) {
+                Utf8 charSequence168;
+                Object oldString168 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(168);
+                if (oldString168 instanceof Utf8) {
+                    charSequence168 = (decoder).readString(((Utf8) oldString168));
+                } else {
+                    charSequence168 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, charSequence168);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F168': "+ unionIndex168));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex169 = (decoder.readIndex());
+        if (unionIndex169 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, null);
+        } else {
+            if (unionIndex169 == 1) {
+                Utf8 charSequence169;
+                Object oldString169 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(169);
+                if (oldString169 instanceof Utf8) {
+                    charSequence169 = (decoder).readString(((Utf8) oldString169));
+                } else {
+                    charSequence169 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, charSequence169);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F169': "+ unionIndex169));
+            }
+        }
+        int unionIndex170 = (decoder.readIndex());
+        if (unionIndex170 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, null);
+        } else {
+            if (unionIndex170 == 1) {
+                Utf8 charSequence170;
+                Object oldString170 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(170);
+                if (oldString170 instanceof Utf8) {
+                    charSequence170 = (decoder).readString(((Utf8) oldString170));
+                } else {
+                    charSequence170 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, charSequence170);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F170': "+ unionIndex170));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex171 = (decoder.readIndex());
+        if (unionIndex171 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, null);
+        } else {
+            if (unionIndex171 == 1) {
+                Utf8 charSequence171;
+                Object oldString171 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(171);
+                if (oldString171 instanceof Utf8) {
+                    charSequence171 = (decoder).readString(((Utf8) oldString171));
+                } else {
+                    charSequence171 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, charSequence171);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F171': "+ unionIndex171));
+            }
+        }
+        int unionIndex172 = (decoder.readIndex());
+        if (unionIndex172 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, null);
+        } else {
+            if (unionIndex172 == 1) {
+                Utf8 charSequence172;
+                Object oldString172 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(172);
+                if (oldString172 instanceof Utf8) {
+                    charSequence172 = (decoder).readString(((Utf8) oldString172));
+                } else {
+                    charSequence172 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, charSequence172);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F172': "+ unionIndex172));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex173 = (decoder.readIndex());
+        if (unionIndex173 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, null);
+        } else {
+            if (unionIndex173 == 1) {
+                Utf8 charSequence173;
+                Object oldString173 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(173);
+                if (oldString173 instanceof Utf8) {
+                    charSequence173 = (decoder).readString(((Utf8) oldString173));
+                } else {
+                    charSequence173 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, charSequence173);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F173': "+ unionIndex173));
+            }
+        }
+        int unionIndex174 = (decoder.readIndex());
+        if (unionIndex174 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, null);
+        } else {
+            if (unionIndex174 == 1) {
+                Utf8 charSequence174;
+                Object oldString174 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(174);
+                if (oldString174 instanceof Utf8) {
+                    charSequence174 = (decoder).readString(((Utf8) oldString174));
+                } else {
+                    charSequence174 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, charSequence174);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F174': "+ unionIndex174));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex175 = (decoder.readIndex());
+        if (unionIndex175 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, null);
+        } else {
+            if (unionIndex175 == 1) {
+                Utf8 charSequence175;
+                Object oldString175 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(175);
+                if (oldString175 instanceof Utf8) {
+                    charSequence175 = (decoder).readString(((Utf8) oldString175));
+                } else {
+                    charSequence175 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, charSequence175);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F175': "+ unionIndex175));
+            }
+        }
+        int unionIndex176 = (decoder.readIndex());
+        if (unionIndex176 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, null);
+        } else {
+            if (unionIndex176 == 1) {
+                Utf8 charSequence176;
+                Object oldString176 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(176);
+                if (oldString176 instanceof Utf8) {
+                    charSequence176 = (decoder).readString(((Utf8) oldString176));
+                } else {
+                    charSequence176 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, charSequence176);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F176': "+ unionIndex176));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex177 = (decoder.readIndex());
+        if (unionIndex177 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, null);
+        } else {
+            if (unionIndex177 == 1) {
+                Utf8 charSequence177;
+                Object oldString177 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(177);
+                if (oldString177 instanceof Utf8) {
+                    charSequence177 = (decoder).readString(((Utf8) oldString177));
+                } else {
+                    charSequence177 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, charSequence177);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F177': "+ unionIndex177));
+            }
+        }
+        int unionIndex178 = (decoder.readIndex());
+        if (unionIndex178 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, null);
+        } else {
+            if (unionIndex178 == 1) {
+                Utf8 charSequence178;
+                Object oldString178 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(178);
+                if (oldString178 instanceof Utf8) {
+                    charSequence178 = (decoder).readString(((Utf8) oldString178));
+                } else {
+                    charSequence178 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, charSequence178);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F178': "+ unionIndex178));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex179 = (decoder.readIndex());
+        if (unionIndex179 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, null);
+        } else {
+            if (unionIndex179 == 1) {
+                Utf8 charSequence179;
+                Object oldString179 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(179);
+                if (oldString179 instanceof Utf8) {
+                    charSequence179 = (decoder).readString(((Utf8) oldString179));
+                } else {
+                    charSequence179 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, charSequence179);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F179': "+ unionIndex179));
+            }
+        }
+        int unionIndex180 = (decoder.readIndex());
+        if (unionIndex180 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, null);
+        } else {
+            if (unionIndex180 == 1) {
+                Utf8 charSequence180;
+                Object oldString180 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(180);
+                if (oldString180 instanceof Utf8) {
+                    charSequence180 = (decoder).readString(((Utf8) oldString180));
+                } else {
+                    charSequence180 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, charSequence180);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F180': "+ unionIndex180));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex181 = (decoder.readIndex());
+        if (unionIndex181 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, null);
+        } else {
+            if (unionIndex181 == 1) {
+                Utf8 charSequence181;
+                Object oldString181 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(181);
+                if (oldString181 instanceof Utf8) {
+                    charSequence181 = (decoder).readString(((Utf8) oldString181));
+                } else {
+                    charSequence181 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, charSequence181);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F181': "+ unionIndex181));
+            }
+        }
+        int unionIndex182 = (decoder.readIndex());
+        if (unionIndex182 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, null);
+        } else {
+            if (unionIndex182 == 1) {
+                Utf8 charSequence182;
+                Object oldString182 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(182);
+                if (oldString182 instanceof Utf8) {
+                    charSequence182 = (decoder).readString(((Utf8) oldString182));
+                } else {
+                    charSequence182 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, charSequence182);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F182': "+ unionIndex182));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex183 = (decoder.readIndex());
+        if (unionIndex183 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, null);
+        } else {
+            if (unionIndex183 == 1) {
+                Utf8 charSequence183;
+                Object oldString183 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(183);
+                if (oldString183 instanceof Utf8) {
+                    charSequence183 = (decoder).readString(((Utf8) oldString183));
+                } else {
+                    charSequence183 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, charSequence183);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F183': "+ unionIndex183));
+            }
+        }
+        int unionIndex184 = (decoder.readIndex());
+        if (unionIndex184 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, null);
+        } else {
+            if (unionIndex184 == 1) {
+                Utf8 charSequence184;
+                Object oldString184 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(184);
+                if (oldString184 instanceof Utf8) {
+                    charSequence184 = (decoder).readString(((Utf8) oldString184));
+                } else {
+                    charSequence184 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, charSequence184);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F184': "+ unionIndex184));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex185 = (decoder.readIndex());
+        if (unionIndex185 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, null);
+        } else {
+            if (unionIndex185 == 1) {
+                Utf8 charSequence185;
+                Object oldString185 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(185);
+                if (oldString185 instanceof Utf8) {
+                    charSequence185 = (decoder).readString(((Utf8) oldString185));
+                } else {
+                    charSequence185 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, charSequence185);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F185': "+ unionIndex185));
+            }
+        }
+        int unionIndex186 = (decoder.readIndex());
+        if (unionIndex186 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, null);
+        } else {
+            if (unionIndex186 == 1) {
+                Utf8 charSequence186;
+                Object oldString186 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(186);
+                if (oldString186 instanceof Utf8) {
+                    charSequence186 = (decoder).readString(((Utf8) oldString186));
+                } else {
+                    charSequence186 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, charSequence186);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F186': "+ unionIndex186));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex187 = (decoder.readIndex());
+        if (unionIndex187 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, null);
+        } else {
+            if (unionIndex187 == 1) {
+                Utf8 charSequence187;
+                Object oldString187 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(187);
+                if (oldString187 instanceof Utf8) {
+                    charSequence187 = (decoder).readString(((Utf8) oldString187));
+                } else {
+                    charSequence187 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, charSequence187);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F187': "+ unionIndex187));
+            }
+        }
+        int unionIndex188 = (decoder.readIndex());
+        if (unionIndex188 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, null);
+        } else {
+            if (unionIndex188 == 1) {
+                Utf8 charSequence188;
+                Object oldString188 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(188);
+                if (oldString188 instanceof Utf8) {
+                    charSequence188 = (decoder).readString(((Utf8) oldString188));
+                } else {
+                    charSequence188 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, charSequence188);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F188': "+ unionIndex188));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex189 = (decoder.readIndex());
+        if (unionIndex189 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, null);
+        } else {
+            if (unionIndex189 == 1) {
+                Utf8 charSequence189;
+                Object oldString189 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(189);
+                if (oldString189 instanceof Utf8) {
+                    charSequence189 = (decoder).readString(((Utf8) oldString189));
+                } else {
+                    charSequence189 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, charSequence189);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F189': "+ unionIndex189));
+            }
+        }
+        int unionIndex190 = (decoder.readIndex());
+        if (unionIndex190 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, null);
+        } else {
+            if (unionIndex190 == 1) {
+                Utf8 charSequence190;
+                Object oldString190 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(190);
+                if (oldString190 instanceof Utf8) {
+                    charSequence190 = (decoder).readString(((Utf8) oldString190));
+                } else {
+                    charSequence190 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, charSequence190);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F190': "+ unionIndex190));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex191 = (decoder.readIndex());
+        if (unionIndex191 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, null);
+        } else {
+            if (unionIndex191 == 1) {
+                Utf8 charSequence191;
+                Object oldString191 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(191);
+                if (oldString191 instanceof Utf8) {
+                    charSequence191 = (decoder).readString(((Utf8) oldString191));
+                } else {
+                    charSequence191 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, charSequence191);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F191': "+ unionIndex191));
+            }
+        }
+        int unionIndex192 = (decoder.readIndex());
+        if (unionIndex192 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, null);
+        } else {
+            if (unionIndex192 == 1) {
+                Utf8 charSequence192;
+                Object oldString192 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(192);
+                if (oldString192 instanceof Utf8) {
+                    charSequence192 = (decoder).readString(((Utf8) oldString192));
+                } else {
+                    charSequence192 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, charSequence192);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F192': "+ unionIndex192));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex193 = (decoder.readIndex());
+        if (unionIndex193 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, null);
+        } else {
+            if (unionIndex193 == 1) {
+                Utf8 charSequence193;
+                Object oldString193 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(193);
+                if (oldString193 instanceof Utf8) {
+                    charSequence193 = (decoder).readString(((Utf8) oldString193));
+                } else {
+                    charSequence193 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, charSequence193);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F193': "+ unionIndex193));
+            }
+        }
+        int unionIndex194 = (decoder.readIndex());
+        if (unionIndex194 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, null);
+        } else {
+            if (unionIndex194 == 1) {
+                Utf8 charSequence194;
+                Object oldString194 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(194);
+                if (oldString194 instanceof Utf8) {
+                    charSequence194 = (decoder).readString(((Utf8) oldString194));
+                } else {
+                    charSequence194 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, charSequence194);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F194': "+ unionIndex194));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex195 = (decoder.readIndex());
+        if (unionIndex195 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, null);
+        } else {
+            if (unionIndex195 == 1) {
+                Utf8 charSequence195;
+                Object oldString195 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(195);
+                if (oldString195 instanceof Utf8) {
+                    charSequence195 = (decoder).readString(((Utf8) oldString195));
+                } else {
+                    charSequence195 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, charSequence195);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F195': "+ unionIndex195));
+            }
+        }
+        int unionIndex196 = (decoder.readIndex());
+        if (unionIndex196 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, null);
+        } else {
+            if (unionIndex196 == 1) {
+                Utf8 charSequence196;
+                Object oldString196 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(196);
+                if (oldString196 instanceof Utf8) {
+                    charSequence196 = (decoder).readString(((Utf8) oldString196));
+                } else {
+                    charSequence196 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, charSequence196);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F196': "+ unionIndex196));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex197 = (decoder.readIndex());
+        if (unionIndex197 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, null);
+        } else {
+            if (unionIndex197 == 1) {
+                Utf8 charSequence197;
+                Object oldString197 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(197);
+                if (oldString197 instanceof Utf8) {
+                    charSequence197 = (decoder).readString(((Utf8) oldString197));
+                } else {
+                    charSequence197 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, charSequence197);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F197': "+ unionIndex197));
+            }
+        }
+        int unionIndex198 = (decoder.readIndex());
+        if (unionIndex198 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, null);
+        } else {
+            if (unionIndex198 == 1) {
+                Utf8 charSequence198;
+                Object oldString198 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(198);
+                if (oldString198 instanceof Utf8) {
+                    charSequence198 = (decoder).readString(((Utf8) oldString198));
+                } else {
+                    charSequence198 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, charSequence198);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F198': "+ unionIndex198));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex199 = (decoder.readIndex());
+        if (unionIndex199 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, null);
+        } else {
+            if (unionIndex199 == 1) {
+                Utf8 charSequence199;
+                Object oldString199 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(199);
+                if (oldString199 instanceof Utf8) {
+                    charSequence199 = (decoder).readString(((Utf8) oldString199));
+                } else {
+                    charSequence199 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, charSequence199);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F199': "+ unionIndex199));
+            }
+        }
+        int unionIndex200 = (decoder.readIndex());
+        if (unionIndex200 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, null);
+        } else {
+            if (unionIndex200 == 1) {
+                Utf8 charSequence200;
+                Object oldString200 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(200);
+                if (oldString200 instanceof Utf8) {
+                    charSequence200 = (decoder).readString(((Utf8) oldString200));
+                } else {
+                    charSequence200 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, charSequence200);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F200': "+ unionIndex200));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex201 = (decoder.readIndex());
+        if (unionIndex201 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, null);
+        } else {
+            if (unionIndex201 == 1) {
+                Utf8 charSequence201;
+                Object oldString201 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(201);
+                if (oldString201 instanceof Utf8) {
+                    charSequence201 = (decoder).readString(((Utf8) oldString201));
+                } else {
+                    charSequence201 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, charSequence201);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F201': "+ unionIndex201));
+            }
+        }
+        int unionIndex202 = (decoder.readIndex());
+        if (unionIndex202 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, null);
+        } else {
+            if (unionIndex202 == 1) {
+                Utf8 charSequence202;
+                Object oldString202 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(202);
+                if (oldString202 instanceof Utf8) {
+                    charSequence202 = (decoder).readString(((Utf8) oldString202));
+                } else {
+                    charSequence202 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, charSequence202);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F202': "+ unionIndex202));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex203 = (decoder.readIndex());
+        if (unionIndex203 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, null);
+        } else {
+            if (unionIndex203 == 1) {
+                Utf8 charSequence203;
+                Object oldString203 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(203);
+                if (oldString203 instanceof Utf8) {
+                    charSequence203 = (decoder).readString(((Utf8) oldString203));
+                } else {
+                    charSequence203 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, charSequence203);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F203': "+ unionIndex203));
+            }
+        }
+        int unionIndex204 = (decoder.readIndex());
+        if (unionIndex204 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, null);
+        } else {
+            if (unionIndex204 == 1) {
+                Utf8 charSequence204;
+                Object oldString204 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(204);
+                if (oldString204 instanceof Utf8) {
+                    charSequence204 = (decoder).readString(((Utf8) oldString204));
+                } else {
+                    charSequence204 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, charSequence204);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F204': "+ unionIndex204));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex205 = (decoder.readIndex());
+        if (unionIndex205 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, null);
+        } else {
+            if (unionIndex205 == 1) {
+                Utf8 charSequence205;
+                Object oldString205 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(205);
+                if (oldString205 instanceof Utf8) {
+                    charSequence205 = (decoder).readString(((Utf8) oldString205));
+                } else {
+                    charSequence205 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, charSequence205);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F205': "+ unionIndex205));
+            }
+        }
+        int unionIndex206 = (decoder.readIndex());
+        if (unionIndex206 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, null);
+        } else {
+            if (unionIndex206 == 1) {
+                Utf8 charSequence206;
+                Object oldString206 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(206);
+                if (oldString206 instanceof Utf8) {
+                    charSequence206 = (decoder).readString(((Utf8) oldString206));
+                } else {
+                    charSequence206 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, charSequence206);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F206': "+ unionIndex206));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex207 = (decoder.readIndex());
+        if (unionIndex207 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, null);
+        } else {
+            if (unionIndex207 == 1) {
+                Utf8 charSequence207;
+                Object oldString207 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(207);
+                if (oldString207 instanceof Utf8) {
+                    charSequence207 = (decoder).readString(((Utf8) oldString207));
+                } else {
+                    charSequence207 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, charSequence207);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F207': "+ unionIndex207));
+            }
+        }
+        int unionIndex208 = (decoder.readIndex());
+        if (unionIndex208 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, null);
+        } else {
+            if (unionIndex208 == 1) {
+                Utf8 charSequence208;
+                Object oldString208 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(208);
+                if (oldString208 instanceof Utf8) {
+                    charSequence208 = (decoder).readString(((Utf8) oldString208));
+                } else {
+                    charSequence208 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, charSequence208);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F208': "+ unionIndex208));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex209 = (decoder.readIndex());
+        if (unionIndex209 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, null);
+        } else {
+            if (unionIndex209 == 1) {
+                Utf8 charSequence209;
+                Object oldString209 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(209);
+                if (oldString209 instanceof Utf8) {
+                    charSequence209 = (decoder).readString(((Utf8) oldString209));
+                } else {
+                    charSequence209 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, charSequence209);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F209': "+ unionIndex209));
+            }
+        }
+        int unionIndex210 = (decoder.readIndex());
+        if (unionIndex210 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, null);
+        } else {
+            if (unionIndex210 == 1) {
+                Utf8 charSequence210;
+                Object oldString210 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(210);
+                if (oldString210 instanceof Utf8) {
+                    charSequence210 = (decoder).readString(((Utf8) oldString210));
+                } else {
+                    charSequence210 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, charSequence210);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F210': "+ unionIndex210));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex211 = (decoder.readIndex());
+        if (unionIndex211 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, null);
+        } else {
+            if (unionIndex211 == 1) {
+                Utf8 charSequence211;
+                Object oldString211 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(211);
+                if (oldString211 instanceof Utf8) {
+                    charSequence211 = (decoder).readString(((Utf8) oldString211));
+                } else {
+                    charSequence211 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, charSequence211);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F211': "+ unionIndex211));
+            }
+        }
+        int unionIndex212 = (decoder.readIndex());
+        if (unionIndex212 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, null);
+        } else {
+            if (unionIndex212 == 1) {
+                Utf8 charSequence212;
+                Object oldString212 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(212);
+                if (oldString212 instanceof Utf8) {
+                    charSequence212 = (decoder).readString(((Utf8) oldString212));
+                } else {
+                    charSequence212 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, charSequence212);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F212': "+ unionIndex212));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex213 = (decoder.readIndex());
+        if (unionIndex213 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, null);
+        } else {
+            if (unionIndex213 == 1) {
+                Utf8 charSequence213;
+                Object oldString213 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(213);
+                if (oldString213 instanceof Utf8) {
+                    charSequence213 = (decoder).readString(((Utf8) oldString213));
+                } else {
+                    charSequence213 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, charSequence213);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F213': "+ unionIndex213));
+            }
+        }
+        int unionIndex214 = (decoder.readIndex());
+        if (unionIndex214 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, null);
+        } else {
+            if (unionIndex214 == 1) {
+                Utf8 charSequence214;
+                Object oldString214 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(214);
+                if (oldString214 instanceof Utf8) {
+                    charSequence214 = (decoder).readString(((Utf8) oldString214));
+                } else {
+                    charSequence214 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, charSequence214);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F214': "+ unionIndex214));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex215 = (decoder.readIndex());
+        if (unionIndex215 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, null);
+        } else {
+            if (unionIndex215 == 1) {
+                Utf8 charSequence215;
+                Object oldString215 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(215);
+                if (oldString215 instanceof Utf8) {
+                    charSequence215 = (decoder).readString(((Utf8) oldString215));
+                } else {
+                    charSequence215 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, charSequence215);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F215': "+ unionIndex215));
+            }
+        }
+        int unionIndex216 = (decoder.readIndex());
+        if (unionIndex216 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, null);
+        } else {
+            if (unionIndex216 == 1) {
+                Utf8 charSequence216;
+                Object oldString216 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(216);
+                if (oldString216 instanceof Utf8) {
+                    charSequence216 = (decoder).readString(((Utf8) oldString216));
+                } else {
+                    charSequence216 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, charSequence216);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F216': "+ unionIndex216));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex217 = (decoder.readIndex());
+        if (unionIndex217 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, null);
+        } else {
+            if (unionIndex217 == 1) {
+                Utf8 charSequence217;
+                Object oldString217 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(217);
+                if (oldString217 instanceof Utf8) {
+                    charSequence217 = (decoder).readString(((Utf8) oldString217));
+                } else {
+                    charSequence217 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, charSequence217);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F217': "+ unionIndex217));
+            }
+        }
+        int unionIndex218 = (decoder.readIndex());
+        if (unionIndex218 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, null);
+        } else {
+            if (unionIndex218 == 1) {
+                Utf8 charSequence218;
+                Object oldString218 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(218);
+                if (oldString218 instanceof Utf8) {
+                    charSequence218 = (decoder).readString(((Utf8) oldString218));
+                } else {
+                    charSequence218 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, charSequence218);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F218': "+ unionIndex218));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex219 = (decoder.readIndex());
+        if (unionIndex219 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, null);
+        } else {
+            if (unionIndex219 == 1) {
+                Utf8 charSequence219;
+                Object oldString219 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(219);
+                if (oldString219 instanceof Utf8) {
+                    charSequence219 = (decoder).readString(((Utf8) oldString219));
+                } else {
+                    charSequence219 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, charSequence219);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F219': "+ unionIndex219));
+            }
+        }
+        int unionIndex220 = (decoder.readIndex());
+        if (unionIndex220 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, null);
+        } else {
+            if (unionIndex220 == 1) {
+                Utf8 charSequence220;
+                Object oldString220 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(220);
+                if (oldString220 instanceof Utf8) {
+                    charSequence220 = (decoder).readString(((Utf8) oldString220));
+                } else {
+                    charSequence220 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, charSequence220);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F220': "+ unionIndex220));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex221 = (decoder.readIndex());
+        if (unionIndex221 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, null);
+        } else {
+            if (unionIndex221 == 1) {
+                Utf8 charSequence221;
+                Object oldString221 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(221);
+                if (oldString221 instanceof Utf8) {
+                    charSequence221 = (decoder).readString(((Utf8) oldString221));
+                } else {
+                    charSequence221 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, charSequence221);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F221': "+ unionIndex221));
+            }
+        }
+        int unionIndex222 = (decoder.readIndex());
+        if (unionIndex222 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, null);
+        } else {
+            if (unionIndex222 == 1) {
+                Utf8 charSequence222;
+                Object oldString222 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(222);
+                if (oldString222 instanceof Utf8) {
+                    charSequence222 = (decoder).readString(((Utf8) oldString222));
+                } else {
+                    charSequence222 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, charSequence222);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F222': "+ unionIndex222));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex223 = (decoder.readIndex());
+        if (unionIndex223 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, null);
+        } else {
+            if (unionIndex223 == 1) {
+                Utf8 charSequence223;
+                Object oldString223 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(223);
+                if (oldString223 instanceof Utf8) {
+                    charSequence223 = (decoder).readString(((Utf8) oldString223));
+                } else {
+                    charSequence223 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, charSequence223);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F223': "+ unionIndex223));
+            }
+        }
+        int unionIndex224 = (decoder.readIndex());
+        if (unionIndex224 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, null);
+        } else {
+            if (unionIndex224 == 1) {
+                Utf8 charSequence224;
+                Object oldString224 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(224);
+                if (oldString224 instanceof Utf8) {
+                    charSequence224 = (decoder).readString(((Utf8) oldString224));
+                } else {
+                    charSequence224 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, charSequence224);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F224': "+ unionIndex224));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex225 = (decoder.readIndex());
+        if (unionIndex225 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, null);
+        } else {
+            if (unionIndex225 == 1) {
+                Utf8 charSequence225;
+                Object oldString225 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(225);
+                if (oldString225 instanceof Utf8) {
+                    charSequence225 = (decoder).readString(((Utf8) oldString225));
+                } else {
+                    charSequence225 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, charSequence225);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F225': "+ unionIndex225));
+            }
+        }
+        int unionIndex226 = (decoder.readIndex());
+        if (unionIndex226 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, null);
+        } else {
+            if (unionIndex226 == 1) {
+                Utf8 charSequence226;
+                Object oldString226 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(226);
+                if (oldString226 instanceof Utf8) {
+                    charSequence226 = (decoder).readString(((Utf8) oldString226));
+                } else {
+                    charSequence226 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, charSequence226);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F226': "+ unionIndex226));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex227 = (decoder.readIndex());
+        if (unionIndex227 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, null);
+        } else {
+            if (unionIndex227 == 1) {
+                Utf8 charSequence227;
+                Object oldString227 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(227);
+                if (oldString227 instanceof Utf8) {
+                    charSequence227 = (decoder).readString(((Utf8) oldString227));
+                } else {
+                    charSequence227 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, charSequence227);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F227': "+ unionIndex227));
+            }
+        }
+        int unionIndex228 = (decoder.readIndex());
+        if (unionIndex228 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, null);
+        } else {
+            if (unionIndex228 == 1) {
+                Utf8 charSequence228;
+                Object oldString228 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(228);
+                if (oldString228 instanceof Utf8) {
+                    charSequence228 = (decoder).readString(((Utf8) oldString228));
+                } else {
+                    charSequence228 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, charSequence228);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F228': "+ unionIndex228));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex229 = (decoder.readIndex());
+        if (unionIndex229 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, null);
+        } else {
+            if (unionIndex229 == 1) {
+                Utf8 charSequence229;
+                Object oldString229 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(229);
+                if (oldString229 instanceof Utf8) {
+                    charSequence229 = (decoder).readString(((Utf8) oldString229));
+                } else {
+                    charSequence229 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, charSequence229);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F229': "+ unionIndex229));
+            }
+        }
+        int unionIndex230 = (decoder.readIndex());
+        if (unionIndex230 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, null);
+        } else {
+            if (unionIndex230 == 1) {
+                Utf8 charSequence230;
+                Object oldString230 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(230);
+                if (oldString230 instanceof Utf8) {
+                    charSequence230 = (decoder).readString(((Utf8) oldString230));
+                } else {
+                    charSequence230 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, charSequence230);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F230': "+ unionIndex230));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex231 = (decoder.readIndex());
+        if (unionIndex231 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, null);
+        } else {
+            if (unionIndex231 == 1) {
+                Utf8 charSequence231;
+                Object oldString231 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(231);
+                if (oldString231 instanceof Utf8) {
+                    charSequence231 = (decoder).readString(((Utf8) oldString231));
+                } else {
+                    charSequence231 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, charSequence231);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F231': "+ unionIndex231));
+            }
+        }
+        int unionIndex232 = (decoder.readIndex());
+        if (unionIndex232 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, null);
+        } else {
+            if (unionIndex232 == 1) {
+                Utf8 charSequence232;
+                Object oldString232 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(232);
+                if (oldString232 instanceof Utf8) {
+                    charSequence232 = (decoder).readString(((Utf8) oldString232));
+                } else {
+                    charSequence232 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, charSequence232);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F232': "+ unionIndex232));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex233 = (decoder.readIndex());
+        if (unionIndex233 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, null);
+        } else {
+            if (unionIndex233 == 1) {
+                Utf8 charSequence233;
+                Object oldString233 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(233);
+                if (oldString233 instanceof Utf8) {
+                    charSequence233 = (decoder).readString(((Utf8) oldString233));
+                } else {
+                    charSequence233 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, charSequence233);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F233': "+ unionIndex233));
+            }
+        }
+        int unionIndex234 = (decoder.readIndex());
+        if (unionIndex234 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, null);
+        } else {
+            if (unionIndex234 == 1) {
+                Utf8 charSequence234;
+                Object oldString234 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(234);
+                if (oldString234 instanceof Utf8) {
+                    charSequence234 = (decoder).readString(((Utf8) oldString234));
+                } else {
+                    charSequence234 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, charSequence234);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F234': "+ unionIndex234));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex235 = (decoder.readIndex());
+        if (unionIndex235 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, null);
+        } else {
+            if (unionIndex235 == 1) {
+                Utf8 charSequence235;
+                Object oldString235 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(235);
+                if (oldString235 instanceof Utf8) {
+                    charSequence235 = (decoder).readString(((Utf8) oldString235));
+                } else {
+                    charSequence235 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, charSequence235);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F235': "+ unionIndex235));
+            }
+        }
+        int unionIndex236 = (decoder.readIndex());
+        if (unionIndex236 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, null);
+        } else {
+            if (unionIndex236 == 1) {
+                Utf8 charSequence236;
+                Object oldString236 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(236);
+                if (oldString236 instanceof Utf8) {
+                    charSequence236 = (decoder).readString(((Utf8) oldString236));
+                } else {
+                    charSequence236 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, charSequence236);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F236': "+ unionIndex236));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex237 = (decoder.readIndex());
+        if (unionIndex237 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, null);
+        } else {
+            if (unionIndex237 == 1) {
+                Utf8 charSequence237;
+                Object oldString237 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(237);
+                if (oldString237 instanceof Utf8) {
+                    charSequence237 = (decoder).readString(((Utf8) oldString237));
+                } else {
+                    charSequence237 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, charSequence237);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F237': "+ unionIndex237));
+            }
+        }
+        int unionIndex238 = (decoder.readIndex());
+        if (unionIndex238 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, null);
+        } else {
+            if (unionIndex238 == 1) {
+                Utf8 charSequence238;
+                Object oldString238 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(238);
+                if (oldString238 instanceof Utf8) {
+                    charSequence238 = (decoder).readString(((Utf8) oldString238));
+                } else {
+                    charSequence238 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, charSequence238);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F238': "+ unionIndex238));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex239 = (decoder.readIndex());
+        if (unionIndex239 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, null);
+        } else {
+            if (unionIndex239 == 1) {
+                Utf8 charSequence239;
+                Object oldString239 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(239);
+                if (oldString239 instanceof Utf8) {
+                    charSequence239 = (decoder).readString(((Utf8) oldString239));
+                } else {
+                    charSequence239 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, charSequence239);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F239': "+ unionIndex239));
+            }
+        }
+        int unionIndex240 = (decoder.readIndex());
+        if (unionIndex240 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, null);
+        } else {
+            if (unionIndex240 == 1) {
+                Utf8 charSequence240;
+                Object oldString240 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(240);
+                if (oldString240 instanceof Utf8) {
+                    charSequence240 = (decoder).readString(((Utf8) oldString240));
+                } else {
+                    charSequence240 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, charSequence240);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F240': "+ unionIndex240));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex241 = (decoder.readIndex());
+        if (unionIndex241 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, null);
+        } else {
+            if (unionIndex241 == 1) {
+                Utf8 charSequence241;
+                Object oldString241 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(241);
+                if (oldString241 instanceof Utf8) {
+                    charSequence241 = (decoder).readString(((Utf8) oldString241));
+                } else {
+                    charSequence241 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, charSequence241);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F241': "+ unionIndex241));
+            }
+        }
+        int unionIndex242 = (decoder.readIndex());
+        if (unionIndex242 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, null);
+        } else {
+            if (unionIndex242 == 1) {
+                Utf8 charSequence242;
+                Object oldString242 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(242);
+                if (oldString242 instanceof Utf8) {
+                    charSequence242 = (decoder).readString(((Utf8) oldString242));
+                } else {
+                    charSequence242 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, charSequence242);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F242': "+ unionIndex242));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex243 = (decoder.readIndex());
+        if (unionIndex243 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, null);
+        } else {
+            if (unionIndex243 == 1) {
+                Utf8 charSequence243;
+                Object oldString243 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(243);
+                if (oldString243 instanceof Utf8) {
+                    charSequence243 = (decoder).readString(((Utf8) oldString243));
+                } else {
+                    charSequence243 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, charSequence243);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F243': "+ unionIndex243));
+            }
+        }
+        int unionIndex244 = (decoder.readIndex());
+        if (unionIndex244 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, null);
+        } else {
+            if (unionIndex244 == 1) {
+                Utf8 charSequence244;
+                Object oldString244 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(244);
+                if (oldString244 instanceof Utf8) {
+                    charSequence244 = (decoder).readString(((Utf8) oldString244));
+                } else {
+                    charSequence244 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, charSequence244);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F244': "+ unionIndex244));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex245 = (decoder.readIndex());
+        if (unionIndex245 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, null);
+        } else {
+            if (unionIndex245 == 1) {
+                Utf8 charSequence245;
+                Object oldString245 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(245);
+                if (oldString245 instanceof Utf8) {
+                    charSequence245 = (decoder).readString(((Utf8) oldString245));
+                } else {
+                    charSequence245 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, charSequence245);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F245': "+ unionIndex245));
+            }
+        }
+        int unionIndex246 = (decoder.readIndex());
+        if (unionIndex246 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, null);
+        } else {
+            if (unionIndex246 == 1) {
+                Utf8 charSequence246;
+                Object oldString246 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(246);
+                if (oldString246 instanceof Utf8) {
+                    charSequence246 = (decoder).readString(((Utf8) oldString246));
+                } else {
+                    charSequence246 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, charSequence246);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F246': "+ unionIndex246));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex247 = (decoder.readIndex());
+        if (unionIndex247 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, null);
+        } else {
+            if (unionIndex247 == 1) {
+                Utf8 charSequence247;
+                Object oldString247 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(247);
+                if (oldString247 instanceof Utf8) {
+                    charSequence247 = (decoder).readString(((Utf8) oldString247));
+                } else {
+                    charSequence247 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, charSequence247);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F247': "+ unionIndex247));
+            }
+        }
+        int unionIndex248 = (decoder.readIndex());
+        if (unionIndex248 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, null);
+        } else {
+            if (unionIndex248 == 1) {
+                Utf8 charSequence248;
+                Object oldString248 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(248);
+                if (oldString248 instanceof Utf8) {
+                    charSequence248 = (decoder).readString(((Utf8) oldString248));
+                } else {
+                    charSequence248 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, charSequence248);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F248': "+ unionIndex248));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex249 = (decoder.readIndex());
+        if (unionIndex249 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, null);
+        } else {
+            if (unionIndex249 == 1) {
+                Utf8 charSequence249;
+                Object oldString249 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(249);
+                if (oldString249 instanceof Utf8) {
+                    charSequence249 = (decoder).readString(((Utf8) oldString249));
+                } else {
+                    charSequence249 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, charSequence249);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F249': "+ unionIndex249));
+            }
+        }
+        int unionIndex250 = (decoder.readIndex());
+        if (unionIndex250 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, null);
+        } else {
+            if (unionIndex250 == 1) {
+                Utf8 charSequence250;
+                Object oldString250 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(250);
+                if (oldString250 instanceof Utf8) {
+                    charSequence250 = (decoder).readString(((Utf8) oldString250));
+                } else {
+                    charSequence250 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, charSequence250);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F250': "+ unionIndex250));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex251 = (decoder.readIndex());
+        if (unionIndex251 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, null);
+        } else {
+            if (unionIndex251 == 1) {
+                Utf8 charSequence251;
+                Object oldString251 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(251);
+                if (oldString251 instanceof Utf8) {
+                    charSequence251 = (decoder).readString(((Utf8) oldString251));
+                } else {
+                    charSequence251 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, charSequence251);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F251': "+ unionIndex251));
+            }
+        }
+        int unionIndex252 = (decoder.readIndex());
+        if (unionIndex252 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, null);
+        } else {
+            if (unionIndex252 == 1) {
+                Utf8 charSequence252;
+                Object oldString252 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(252);
+                if (oldString252 instanceof Utf8) {
+                    charSequence252 = (decoder).readString(((Utf8) oldString252));
+                } else {
+                    charSequence252 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, charSequence252);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F252': "+ unionIndex252));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex253 = (decoder.readIndex());
+        if (unionIndex253 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, null);
+        } else {
+            if (unionIndex253 == 1) {
+                Utf8 charSequence253;
+                Object oldString253 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(253);
+                if (oldString253 instanceof Utf8) {
+                    charSequence253 = (decoder).readString(((Utf8) oldString253));
+                } else {
+                    charSequence253 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, charSequence253);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F253': "+ unionIndex253));
+            }
+        }
+        int unionIndex254 = (decoder.readIndex());
+        if (unionIndex254 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, null);
+        } else {
+            if (unionIndex254 == 1) {
+                Utf8 charSequence254;
+                Object oldString254 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(254);
+                if (oldString254 instanceof Utf8) {
+                    charSequence254 = (decoder).readString(((Utf8) oldString254));
+                } else {
+                    charSequence254 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, charSequence254);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F254': "+ unionIndex254));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex255 = (decoder.readIndex());
+        if (unionIndex255 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, null);
+        } else {
+            if (unionIndex255 == 1) {
+                Utf8 charSequence255;
+                Object oldString255 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(255);
+                if (oldString255 instanceof Utf8) {
+                    charSequence255 = (decoder).readString(((Utf8) oldString255));
+                } else {
+                    charSequence255 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, charSequence255);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F255': "+ unionIndex255));
+            }
+        }
+        int unionIndex256 = (decoder.readIndex());
+        if (unionIndex256 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, null);
+        } else {
+            if (unionIndex256 == 1) {
+                Utf8 charSequence256;
+                Object oldString256 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(256);
+                if (oldString256 instanceof Utf8) {
+                    charSequence256 = (decoder).readString(((Utf8) oldString256));
+                } else {
+                    charSequence256 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, charSequence256);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F256': "+ unionIndex256));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex257 = (decoder.readIndex());
+        if (unionIndex257 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, null);
+        } else {
+            if (unionIndex257 == 1) {
+                Utf8 charSequence257;
+                Object oldString257 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(257);
+                if (oldString257 instanceof Utf8) {
+                    charSequence257 = (decoder).readString(((Utf8) oldString257));
+                } else {
+                    charSequence257 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, charSequence257);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F257': "+ unionIndex257));
+            }
+        }
+        int unionIndex258 = (decoder.readIndex());
+        if (unionIndex258 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, null);
+        } else {
+            if (unionIndex258 == 1) {
+                Utf8 charSequence258;
+                Object oldString258 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(258);
+                if (oldString258 instanceof Utf8) {
+                    charSequence258 = (decoder).readString(((Utf8) oldString258));
+                } else {
+                    charSequence258 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, charSequence258);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F258': "+ unionIndex258));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex259 = (decoder.readIndex());
+        if (unionIndex259 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, null);
+        } else {
+            if (unionIndex259 == 1) {
+                Utf8 charSequence259;
+                Object oldString259 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(259);
+                if (oldString259 instanceof Utf8) {
+                    charSequence259 = (decoder).readString(((Utf8) oldString259));
+                } else {
+                    charSequence259 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, charSequence259);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F259': "+ unionIndex259));
+            }
+        }
+        int unionIndex260 = (decoder.readIndex());
+        if (unionIndex260 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, null);
+        } else {
+            if (unionIndex260 == 1) {
+                Utf8 charSequence260;
+                Object oldString260 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(260);
+                if (oldString260 instanceof Utf8) {
+                    charSequence260 = (decoder).readString(((Utf8) oldString260));
+                } else {
+                    charSequence260 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, charSequence260);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F260': "+ unionIndex260));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex261 = (decoder.readIndex());
+        if (unionIndex261 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, null);
+        } else {
+            if (unionIndex261 == 1) {
+                Utf8 charSequence261;
+                Object oldString261 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(261);
+                if (oldString261 instanceof Utf8) {
+                    charSequence261 = (decoder).readString(((Utf8) oldString261));
+                } else {
+                    charSequence261 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, charSequence261);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F261': "+ unionIndex261));
+            }
+        }
+        int unionIndex262 = (decoder.readIndex());
+        if (unionIndex262 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, null);
+        } else {
+            if (unionIndex262 == 1) {
+                Utf8 charSequence262;
+                Object oldString262 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(262);
+                if (oldString262 instanceof Utf8) {
+                    charSequence262 = (decoder).readString(((Utf8) oldString262));
+                } else {
+                    charSequence262 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, charSequence262);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F262': "+ unionIndex262));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex263 = (decoder.readIndex());
+        if (unionIndex263 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, null);
+        } else {
+            if (unionIndex263 == 1) {
+                Utf8 charSequence263;
+                Object oldString263 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(263);
+                if (oldString263 instanceof Utf8) {
+                    charSequence263 = (decoder).readString(((Utf8) oldString263));
+                } else {
+                    charSequence263 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, charSequence263);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F263': "+ unionIndex263));
+            }
+        }
+        int unionIndex264 = (decoder.readIndex());
+        if (unionIndex264 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, null);
+        } else {
+            if (unionIndex264 == 1) {
+                Utf8 charSequence264;
+                Object oldString264 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(264);
+                if (oldString264 instanceof Utf8) {
+                    charSequence264 = (decoder).readString(((Utf8) oldString264));
+                } else {
+                    charSequence264 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, charSequence264);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F264': "+ unionIndex264));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex265 = (decoder.readIndex());
+        if (unionIndex265 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, null);
+        } else {
+            if (unionIndex265 == 1) {
+                Utf8 charSequence265;
+                Object oldString265 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(265);
+                if (oldString265 instanceof Utf8) {
+                    charSequence265 = (decoder).readString(((Utf8) oldString265));
+                } else {
+                    charSequence265 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, charSequence265);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F265': "+ unionIndex265));
+            }
+        }
+        int unionIndex266 = (decoder.readIndex());
+        if (unionIndex266 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, null);
+        } else {
+            if (unionIndex266 == 1) {
+                Utf8 charSequence266;
+                Object oldString266 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(266);
+                if (oldString266 instanceof Utf8) {
+                    charSequence266 = (decoder).readString(((Utf8) oldString266));
+                } else {
+                    charSequence266 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, charSequence266);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F266': "+ unionIndex266));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex267 = (decoder.readIndex());
+        if (unionIndex267 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, null);
+        } else {
+            if (unionIndex267 == 1) {
+                Utf8 charSequence267;
+                Object oldString267 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(267);
+                if (oldString267 instanceof Utf8) {
+                    charSequence267 = (decoder).readString(((Utf8) oldString267));
+                } else {
+                    charSequence267 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, charSequence267);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F267': "+ unionIndex267));
+            }
+        }
+        int unionIndex268 = (decoder.readIndex());
+        if (unionIndex268 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, null);
+        } else {
+            if (unionIndex268 == 1) {
+                Utf8 charSequence268;
+                Object oldString268 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(268);
+                if (oldString268 instanceof Utf8) {
+                    charSequence268 = (decoder).readString(((Utf8) oldString268));
+                } else {
+                    charSequence268 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, charSequence268);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F268': "+ unionIndex268));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex269 = (decoder.readIndex());
+        if (unionIndex269 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, null);
+        } else {
+            if (unionIndex269 == 1) {
+                Utf8 charSequence269;
+                Object oldString269 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(269);
+                if (oldString269 instanceof Utf8) {
+                    charSequence269 = (decoder).readString(((Utf8) oldString269));
+                } else {
+                    charSequence269 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, charSequence269);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F269': "+ unionIndex269));
+            }
+        }
+        int unionIndex270 = (decoder.readIndex());
+        if (unionIndex270 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, null);
+        } else {
+            if (unionIndex270 == 1) {
+                Utf8 charSequence270;
+                Object oldString270 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(270);
+                if (oldString270 instanceof Utf8) {
+                    charSequence270 = (decoder).readString(((Utf8) oldString270));
+                } else {
+                    charSequence270 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, charSequence270);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F270': "+ unionIndex270));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex271 = (decoder.readIndex());
+        if (unionIndex271 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, null);
+        } else {
+            if (unionIndex271 == 1) {
+                Utf8 charSequence271;
+                Object oldString271 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(271);
+                if (oldString271 instanceof Utf8) {
+                    charSequence271 = (decoder).readString(((Utf8) oldString271));
+                } else {
+                    charSequence271 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, charSequence271);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F271': "+ unionIndex271));
+            }
+        }
+        int unionIndex272 = (decoder.readIndex());
+        if (unionIndex272 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, null);
+        } else {
+            if (unionIndex272 == 1) {
+                Utf8 charSequence272;
+                Object oldString272 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(272);
+                if (oldString272 instanceof Utf8) {
+                    charSequence272 = (decoder).readString(((Utf8) oldString272));
+                } else {
+                    charSequence272 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, charSequence272);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F272': "+ unionIndex272));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex273 = (decoder.readIndex());
+        if (unionIndex273 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, null);
+        } else {
+            if (unionIndex273 == 1) {
+                Utf8 charSequence273;
+                Object oldString273 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(273);
+                if (oldString273 instanceof Utf8) {
+                    charSequence273 = (decoder).readString(((Utf8) oldString273));
+                } else {
+                    charSequence273 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, charSequence273);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F273': "+ unionIndex273));
+            }
+        }
+        int unionIndex274 = (decoder.readIndex());
+        if (unionIndex274 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, null);
+        } else {
+            if (unionIndex274 == 1) {
+                Utf8 charSequence274;
+                Object oldString274 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(274);
+                if (oldString274 instanceof Utf8) {
+                    charSequence274 = (decoder).readString(((Utf8) oldString274));
+                } else {
+                    charSequence274 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, charSequence274);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F274': "+ unionIndex274));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex275 = (decoder.readIndex());
+        if (unionIndex275 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, null);
+        } else {
+            if (unionIndex275 == 1) {
+                Utf8 charSequence275;
+                Object oldString275 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(275);
+                if (oldString275 instanceof Utf8) {
+                    charSequence275 = (decoder).readString(((Utf8) oldString275));
+                } else {
+                    charSequence275 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, charSequence275);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F275': "+ unionIndex275));
+            }
+        }
+        int unionIndex276 = (decoder.readIndex());
+        if (unionIndex276 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, null);
+        } else {
+            if (unionIndex276 == 1) {
+                Utf8 charSequence276;
+                Object oldString276 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(276);
+                if (oldString276 instanceof Utf8) {
+                    charSequence276 = (decoder).readString(((Utf8) oldString276));
+                } else {
+                    charSequence276 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, charSequence276);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F276': "+ unionIndex276));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex277 = (decoder.readIndex());
+        if (unionIndex277 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, null);
+        } else {
+            if (unionIndex277 == 1) {
+                Utf8 charSequence277;
+                Object oldString277 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(277);
+                if (oldString277 instanceof Utf8) {
+                    charSequence277 = (decoder).readString(((Utf8) oldString277));
+                } else {
+                    charSequence277 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, charSequence277);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F277': "+ unionIndex277));
+            }
+        }
+        int unionIndex278 = (decoder.readIndex());
+        if (unionIndex278 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, null);
+        } else {
+            if (unionIndex278 == 1) {
+                Utf8 charSequence278;
+                Object oldString278 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(278);
+                if (oldString278 instanceof Utf8) {
+                    charSequence278 = (decoder).readString(((Utf8) oldString278));
+                } else {
+                    charSequence278 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, charSequence278);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F278': "+ unionIndex278));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex279 = (decoder.readIndex());
+        if (unionIndex279 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, null);
+        } else {
+            if (unionIndex279 == 1) {
+                Utf8 charSequence279;
+                Object oldString279 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(279);
+                if (oldString279 instanceof Utf8) {
+                    charSequence279 = (decoder).readString(((Utf8) oldString279));
+                } else {
+                    charSequence279 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, charSequence279);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F279': "+ unionIndex279));
+            }
+        }
+        int unionIndex280 = (decoder.readIndex());
+        if (unionIndex280 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, null);
+        } else {
+            if (unionIndex280 == 1) {
+                Utf8 charSequence280;
+                Object oldString280 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(280);
+                if (oldString280 instanceof Utf8) {
+                    charSequence280 = (decoder).readString(((Utf8) oldString280));
+                } else {
+                    charSequence280 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, charSequence280);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F280': "+ unionIndex280));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex281 = (decoder.readIndex());
+        if (unionIndex281 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, null);
+        } else {
+            if (unionIndex281 == 1) {
+                Utf8 charSequence281;
+                Object oldString281 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(281);
+                if (oldString281 instanceof Utf8) {
+                    charSequence281 = (decoder).readString(((Utf8) oldString281));
+                } else {
+                    charSequence281 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, charSequence281);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F281': "+ unionIndex281));
+            }
+        }
+        int unionIndex282 = (decoder.readIndex());
+        if (unionIndex282 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, null);
+        } else {
+            if (unionIndex282 == 1) {
+                Utf8 charSequence282;
+                Object oldString282 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(282);
+                if (oldString282 instanceof Utf8) {
+                    charSequence282 = (decoder).readString(((Utf8) oldString282));
+                } else {
+                    charSequence282 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, charSequence282);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F282': "+ unionIndex282));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex283 = (decoder.readIndex());
+        if (unionIndex283 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, null);
+        } else {
+            if (unionIndex283 == 1) {
+                Utf8 charSequence283;
+                Object oldString283 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(283);
+                if (oldString283 instanceof Utf8) {
+                    charSequence283 = (decoder).readString(((Utf8) oldString283));
+                } else {
+                    charSequence283 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, charSequence283);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F283': "+ unionIndex283));
+            }
+        }
+        int unionIndex284 = (decoder.readIndex());
+        if (unionIndex284 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, null);
+        } else {
+            if (unionIndex284 == 1) {
+                Utf8 charSequence284;
+                Object oldString284 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(284);
+                if (oldString284 instanceof Utf8) {
+                    charSequence284 = (decoder).readString(((Utf8) oldString284));
+                } else {
+                    charSequence284 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, charSequence284);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F284': "+ unionIndex284));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex285 = (decoder.readIndex());
+        if (unionIndex285 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, null);
+        } else {
+            if (unionIndex285 == 1) {
+                Utf8 charSequence285;
+                Object oldString285 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(285);
+                if (oldString285 instanceof Utf8) {
+                    charSequence285 = (decoder).readString(((Utf8) oldString285));
+                } else {
+                    charSequence285 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, charSequence285);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F285': "+ unionIndex285));
+            }
+        }
+        int unionIndex286 = (decoder.readIndex());
+        if (unionIndex286 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, null);
+        } else {
+            if (unionIndex286 == 1) {
+                Utf8 charSequence286;
+                Object oldString286 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(286);
+                if (oldString286 instanceof Utf8) {
+                    charSequence286 = (decoder).readString(((Utf8) oldString286));
+                } else {
+                    charSequence286 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, charSequence286);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F286': "+ unionIndex286));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex287 = (decoder.readIndex());
+        if (unionIndex287 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, null);
+        } else {
+            if (unionIndex287 == 1) {
+                Utf8 charSequence287;
+                Object oldString287 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(287);
+                if (oldString287 instanceof Utf8) {
+                    charSequence287 = (decoder).readString(((Utf8) oldString287));
+                } else {
+                    charSequence287 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, charSequence287);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F287': "+ unionIndex287));
+            }
+        }
+        int unionIndex288 = (decoder.readIndex());
+        if (unionIndex288 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, null);
+        } else {
+            if (unionIndex288 == 1) {
+                Utf8 charSequence288;
+                Object oldString288 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(288);
+                if (oldString288 instanceof Utf8) {
+                    charSequence288 = (decoder).readString(((Utf8) oldString288));
+                } else {
+                    charSequence288 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, charSequence288);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F288': "+ unionIndex288));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex289 = (decoder.readIndex());
+        if (unionIndex289 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, null);
+        } else {
+            if (unionIndex289 == 1) {
+                Utf8 charSequence289;
+                Object oldString289 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(289);
+                if (oldString289 instanceof Utf8) {
+                    charSequence289 = (decoder).readString(((Utf8) oldString289));
+                } else {
+                    charSequence289 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, charSequence289);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F289': "+ unionIndex289));
+            }
+        }
+        int unionIndex290 = (decoder.readIndex());
+        if (unionIndex290 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, null);
+        } else {
+            if (unionIndex290 == 1) {
+                Utf8 charSequence290;
+                Object oldString290 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(290);
+                if (oldString290 instanceof Utf8) {
+                    charSequence290 = (decoder).readString(((Utf8) oldString290));
+                } else {
+                    charSequence290 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, charSequence290);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F290': "+ unionIndex290));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex291 = (decoder.readIndex());
+        if (unionIndex291 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, null);
+        } else {
+            if (unionIndex291 == 1) {
+                Utf8 charSequence291;
+                Object oldString291 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(291);
+                if (oldString291 instanceof Utf8) {
+                    charSequence291 = (decoder).readString(((Utf8) oldString291));
+                } else {
+                    charSequence291 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, charSequence291);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F291': "+ unionIndex291));
+            }
+        }
+        int unionIndex292 = (decoder.readIndex());
+        if (unionIndex292 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, null);
+        } else {
+            if (unionIndex292 == 1) {
+                Utf8 charSequence292;
+                Object oldString292 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(292);
+                if (oldString292 instanceof Utf8) {
+                    charSequence292 = (decoder).readString(((Utf8) oldString292));
+                } else {
+                    charSequence292 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, charSequence292);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F292': "+ unionIndex292));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex293 = (decoder.readIndex());
+        if (unionIndex293 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, null);
+        } else {
+            if (unionIndex293 == 1) {
+                Utf8 charSequence293;
+                Object oldString293 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(293);
+                if (oldString293 instanceof Utf8) {
+                    charSequence293 = (decoder).readString(((Utf8) oldString293));
+                } else {
+                    charSequence293 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, charSequence293);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F293': "+ unionIndex293));
+            }
+        }
+        int unionIndex294 = (decoder.readIndex());
+        if (unionIndex294 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, null);
+        } else {
+            if (unionIndex294 == 1) {
+                Utf8 charSequence294;
+                Object oldString294 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(294);
+                if (oldString294 instanceof Utf8) {
+                    charSequence294 = (decoder).readString(((Utf8) oldString294));
+                } else {
+                    charSequence294 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, charSequence294);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F294': "+ unionIndex294));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex295 = (decoder.readIndex());
+        if (unionIndex295 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, null);
+        } else {
+            if (unionIndex295 == 1) {
+                Utf8 charSequence295;
+                Object oldString295 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(295);
+                if (oldString295 instanceof Utf8) {
+                    charSequence295 = (decoder).readString(((Utf8) oldString295));
+                } else {
+                    charSequence295 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, charSequence295);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F295': "+ unionIndex295));
+            }
+        }
+        int unionIndex296 = (decoder.readIndex());
+        if (unionIndex296 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, null);
+        } else {
+            if (unionIndex296 == 1) {
+                Utf8 charSequence296;
+                Object oldString296 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(296);
+                if (oldString296 instanceof Utf8) {
+                    charSequence296 = (decoder).readString(((Utf8) oldString296));
+                } else {
+                    charSequence296 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, charSequence296);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F296': "+ unionIndex296));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex297 = (decoder.readIndex());
+        if (unionIndex297 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, null);
+        } else {
+            if (unionIndex297 == 1) {
+                Utf8 charSequence297;
+                Object oldString297 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(297);
+                if (oldString297 instanceof Utf8) {
+                    charSequence297 = (decoder).readString(((Utf8) oldString297));
+                } else {
+                    charSequence297 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, charSequence297);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F297': "+ unionIndex297));
+            }
+        }
+        int unionIndex298 = (decoder.readIndex());
+        if (unionIndex298 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, null);
+        } else {
+            if (unionIndex298 == 1) {
+                Utf8 charSequence298;
+                Object oldString298 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(298);
+                if (oldString298 instanceof Utf8) {
+                    charSequence298 = (decoder).readString(((Utf8) oldString298));
+                } else {
+                    charSequence298 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, charSequence298);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F298': "+ unionIndex298));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex299 = (decoder.readIndex());
+        if (unionIndex299 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, null);
+        } else {
+            if (unionIndex299 == 1) {
+                Utf8 charSequence299;
+                Object oldString299 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(299);
+                if (oldString299 instanceof Utf8) {
+                    charSequence299 = (decoder).readString(((Utf8) oldString299));
+                } else {
+                    charSequence299 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, charSequence299);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F299': "+ unionIndex299));
+            }
+        }
+        int unionIndex300 = (decoder.readIndex());
+        if (unionIndex300 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, null);
+        } else {
+            if (unionIndex300 == 1) {
+                Utf8 charSequence300;
+                Object oldString300 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(300);
+                if (oldString300 instanceof Utf8) {
+                    charSequence300 = (decoder).readString(((Utf8) oldString300));
+                } else {
+                    charSequence300 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, charSequence300);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F300': "+ unionIndex300));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex301 = (decoder.readIndex());
+        if (unionIndex301 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, null);
+        } else {
+            if (unionIndex301 == 1) {
+                Utf8 charSequence301;
+                Object oldString301 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(301);
+                if (oldString301 instanceof Utf8) {
+                    charSequence301 = (decoder).readString(((Utf8) oldString301));
+                } else {
+                    charSequence301 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, charSequence301);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F301': "+ unionIndex301));
+            }
+        }
+        int unionIndex302 = (decoder.readIndex());
+        if (unionIndex302 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, null);
+        } else {
+            if (unionIndex302 == 1) {
+                Utf8 charSequence302;
+                Object oldString302 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(302);
+                if (oldString302 instanceof Utf8) {
+                    charSequence302 = (decoder).readString(((Utf8) oldString302));
+                } else {
+                    charSequence302 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, charSequence302);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F302': "+ unionIndex302));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex303 = (decoder.readIndex());
+        if (unionIndex303 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, null);
+        } else {
+            if (unionIndex303 == 1) {
+                Utf8 charSequence303;
+                Object oldString303 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(303);
+                if (oldString303 instanceof Utf8) {
+                    charSequence303 = (decoder).readString(((Utf8) oldString303));
+                } else {
+                    charSequence303 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, charSequence303);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F303': "+ unionIndex303));
+            }
+        }
+        int unionIndex304 = (decoder.readIndex());
+        if (unionIndex304 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, null);
+        } else {
+            if (unionIndex304 == 1) {
+                Utf8 charSequence304;
+                Object oldString304 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(304);
+                if (oldString304 instanceof Utf8) {
+                    charSequence304 = (decoder).readString(((Utf8) oldString304));
+                } else {
+                    charSequence304 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, charSequence304);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F304': "+ unionIndex304));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex305 = (decoder.readIndex());
+        if (unionIndex305 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, null);
+        } else {
+            if (unionIndex305 == 1) {
+                Utf8 charSequence305;
+                Object oldString305 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(305);
+                if (oldString305 instanceof Utf8) {
+                    charSequence305 = (decoder).readString(((Utf8) oldString305));
+                } else {
+                    charSequence305 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, charSequence305);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F305': "+ unionIndex305));
+            }
+        }
+        int unionIndex306 = (decoder.readIndex());
+        if (unionIndex306 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, null);
+        } else {
+            if (unionIndex306 == 1) {
+                Utf8 charSequence306;
+                Object oldString306 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(306);
+                if (oldString306 instanceof Utf8) {
+                    charSequence306 = (decoder).readString(((Utf8) oldString306));
+                } else {
+                    charSequence306 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, charSequence306);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F306': "+ unionIndex306));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex307 = (decoder.readIndex());
+        if (unionIndex307 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, null);
+        } else {
+            if (unionIndex307 == 1) {
+                Utf8 charSequence307;
+                Object oldString307 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(307);
+                if (oldString307 instanceof Utf8) {
+                    charSequence307 = (decoder).readString(((Utf8) oldString307));
+                } else {
+                    charSequence307 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, charSequence307);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F307': "+ unionIndex307));
+            }
+        }
+        int unionIndex308 = (decoder.readIndex());
+        if (unionIndex308 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, null);
+        } else {
+            if (unionIndex308 == 1) {
+                Utf8 charSequence308;
+                Object oldString308 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(308);
+                if (oldString308 instanceof Utf8) {
+                    charSequence308 = (decoder).readString(((Utf8) oldString308));
+                } else {
+                    charSequence308 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, charSequence308);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F308': "+ unionIndex308));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex309 = (decoder.readIndex());
+        if (unionIndex309 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, null);
+        } else {
+            if (unionIndex309 == 1) {
+                Utf8 charSequence309;
+                Object oldString309 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(309);
+                if (oldString309 instanceof Utf8) {
+                    charSequence309 = (decoder).readString(((Utf8) oldString309));
+                } else {
+                    charSequence309 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, charSequence309);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F309': "+ unionIndex309));
+            }
+        }
+        int unionIndex310 = (decoder.readIndex());
+        if (unionIndex310 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, null);
+        } else {
+            if (unionIndex310 == 1) {
+                Utf8 charSequence310;
+                Object oldString310 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(310);
+                if (oldString310 instanceof Utf8) {
+                    charSequence310 = (decoder).readString(((Utf8) oldString310));
+                } else {
+                    charSequence310 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, charSequence310);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F310': "+ unionIndex310));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex311 = (decoder.readIndex());
+        if (unionIndex311 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, null);
+        } else {
+            if (unionIndex311 == 1) {
+                Utf8 charSequence311;
+                Object oldString311 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(311);
+                if (oldString311 instanceof Utf8) {
+                    charSequence311 = (decoder).readString(((Utf8) oldString311));
+                } else {
+                    charSequence311 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, charSequence311);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F311': "+ unionIndex311));
+            }
+        }
+        int unionIndex312 = (decoder.readIndex());
+        if (unionIndex312 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, null);
+        } else {
+            if (unionIndex312 == 1) {
+                Utf8 charSequence312;
+                Object oldString312 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(312);
+                if (oldString312 instanceof Utf8) {
+                    charSequence312 = (decoder).readString(((Utf8) oldString312));
+                } else {
+                    charSequence312 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, charSequence312);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F312': "+ unionIndex312));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex313 = (decoder.readIndex());
+        if (unionIndex313 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, null);
+        } else {
+            if (unionIndex313 == 1) {
+                Utf8 charSequence313;
+                Object oldString313 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(313);
+                if (oldString313 instanceof Utf8) {
+                    charSequence313 = (decoder).readString(((Utf8) oldString313));
+                } else {
+                    charSequence313 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, charSequence313);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F313': "+ unionIndex313));
+            }
+        }
+        int unionIndex314 = (decoder.readIndex());
+        if (unionIndex314 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, null);
+        } else {
+            if (unionIndex314 == 1) {
+                Utf8 charSequence314;
+                Object oldString314 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(314);
+                if (oldString314 instanceof Utf8) {
+                    charSequence314 = (decoder).readString(((Utf8) oldString314));
+                } else {
+                    charSequence314 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, charSequence314);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F314': "+ unionIndex314));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex315 = (decoder.readIndex());
+        if (unionIndex315 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, null);
+        } else {
+            if (unionIndex315 == 1) {
+                Utf8 charSequence315;
+                Object oldString315 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(315);
+                if (oldString315 instanceof Utf8) {
+                    charSequence315 = (decoder).readString(((Utf8) oldString315));
+                } else {
+                    charSequence315 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, charSequence315);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F315': "+ unionIndex315));
+            }
+        }
+        int unionIndex316 = (decoder.readIndex());
+        if (unionIndex316 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, null);
+        } else {
+            if (unionIndex316 == 1) {
+                Utf8 charSequence316;
+                Object oldString316 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(316);
+                if (oldString316 instanceof Utf8) {
+                    charSequence316 = (decoder).readString(((Utf8) oldString316));
+                } else {
+                    charSequence316 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, charSequence316);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F316': "+ unionIndex316));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex317 = (decoder.readIndex());
+        if (unionIndex317 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, null);
+        } else {
+            if (unionIndex317 == 1) {
+                Utf8 charSequence317;
+                Object oldString317 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(317);
+                if (oldString317 instanceof Utf8) {
+                    charSequence317 = (decoder).readString(((Utf8) oldString317));
+                } else {
+                    charSequence317 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, charSequence317);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F317': "+ unionIndex317));
+            }
+        }
+        int unionIndex318 = (decoder.readIndex());
+        if (unionIndex318 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, null);
+        } else {
+            if (unionIndex318 == 1) {
+                Utf8 charSequence318;
+                Object oldString318 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(318);
+                if (oldString318 instanceof Utf8) {
+                    charSequence318 = (decoder).readString(((Utf8) oldString318));
+                } else {
+                    charSequence318 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, charSequence318);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F318': "+ unionIndex318));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex319 = (decoder.readIndex());
+        if (unionIndex319 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, null);
+        } else {
+            if (unionIndex319 == 1) {
+                Utf8 charSequence319;
+                Object oldString319 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(319);
+                if (oldString319 instanceof Utf8) {
+                    charSequence319 = (decoder).readString(((Utf8) oldString319));
+                } else {
+                    charSequence319 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, charSequence319);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F319': "+ unionIndex319));
+            }
+        }
+        int unionIndex320 = (decoder.readIndex());
+        if (unionIndex320 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, null);
+        } else {
+            if (unionIndex320 == 1) {
+                Utf8 charSequence320;
+                Object oldString320 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(320);
+                if (oldString320 instanceof Utf8) {
+                    charSequence320 = (decoder).readString(((Utf8) oldString320));
+                } else {
+                    charSequence320 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, charSequence320);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F320': "+ unionIndex320));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex321 = (decoder.readIndex());
+        if (unionIndex321 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, null);
+        } else {
+            if (unionIndex321 == 1) {
+                Utf8 charSequence321;
+                Object oldString321 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(321);
+                if (oldString321 instanceof Utf8) {
+                    charSequence321 = (decoder).readString(((Utf8) oldString321));
+                } else {
+                    charSequence321 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, charSequence321);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F321': "+ unionIndex321));
+            }
+        }
+        int unionIndex322 = (decoder.readIndex());
+        if (unionIndex322 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, null);
+        } else {
+            if (unionIndex322 == 1) {
+                Utf8 charSequence322;
+                Object oldString322 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(322);
+                if (oldString322 instanceof Utf8) {
+                    charSequence322 = (decoder).readString(((Utf8) oldString322));
+                } else {
+                    charSequence322 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, charSequence322);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F322': "+ unionIndex322));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex323 = (decoder.readIndex());
+        if (unionIndex323 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, null);
+        } else {
+            if (unionIndex323 == 1) {
+                Utf8 charSequence323;
+                Object oldString323 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(323);
+                if (oldString323 instanceof Utf8) {
+                    charSequence323 = (decoder).readString(((Utf8) oldString323));
+                } else {
+                    charSequence323 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, charSequence323);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F323': "+ unionIndex323));
+            }
+        }
+        int unionIndex324 = (decoder.readIndex());
+        if (unionIndex324 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, null);
+        } else {
+            if (unionIndex324 == 1) {
+                Utf8 charSequence324;
+                Object oldString324 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(324);
+                if (oldString324 instanceof Utf8) {
+                    charSequence324 = (decoder).readString(((Utf8) oldString324));
+                } else {
+                    charSequence324 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, charSequence324);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F324': "+ unionIndex324));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex325 = (decoder.readIndex());
+        if (unionIndex325 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, null);
+        } else {
+            if (unionIndex325 == 1) {
+                Utf8 charSequence325;
+                Object oldString325 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(325);
+                if (oldString325 instanceof Utf8) {
+                    charSequence325 = (decoder).readString(((Utf8) oldString325));
+                } else {
+                    charSequence325 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, charSequence325);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F325': "+ unionIndex325));
+            }
+        }
+        int unionIndex326 = (decoder.readIndex());
+        if (unionIndex326 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, null);
+        } else {
+            if (unionIndex326 == 1) {
+                Utf8 charSequence326;
+                Object oldString326 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(326);
+                if (oldString326 instanceof Utf8) {
+                    charSequence326 = (decoder).readString(((Utf8) oldString326));
+                } else {
+                    charSequence326 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, charSequence326);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F326': "+ unionIndex326));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex327 = (decoder.readIndex());
+        if (unionIndex327 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, null);
+        } else {
+            if (unionIndex327 == 1) {
+                Utf8 charSequence327;
+                Object oldString327 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(327);
+                if (oldString327 instanceof Utf8) {
+                    charSequence327 = (decoder).readString(((Utf8) oldString327));
+                } else {
+                    charSequence327 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, charSequence327);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F327': "+ unionIndex327));
+            }
+        }
+        int unionIndex328 = (decoder.readIndex());
+        if (unionIndex328 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, null);
+        } else {
+            if (unionIndex328 == 1) {
+                Utf8 charSequence328;
+                Object oldString328 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(328);
+                if (oldString328 instanceof Utf8) {
+                    charSequence328 = (decoder).readString(((Utf8) oldString328));
+                } else {
+                    charSequence328 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, charSequence328);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F328': "+ unionIndex328));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex329 = (decoder.readIndex());
+        if (unionIndex329 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, null);
+        } else {
+            if (unionIndex329 == 1) {
+                Utf8 charSequence329;
+                Object oldString329 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(329);
+                if (oldString329 instanceof Utf8) {
+                    charSequence329 = (decoder).readString(((Utf8) oldString329));
+                } else {
+                    charSequence329 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, charSequence329);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F329': "+ unionIndex329));
+            }
+        }
+        int unionIndex330 = (decoder.readIndex());
+        if (unionIndex330 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, null);
+        } else {
+            if (unionIndex330 == 1) {
+                Utf8 charSequence330;
+                Object oldString330 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(330);
+                if (oldString330 instanceof Utf8) {
+                    charSequence330 = (decoder).readString(((Utf8) oldString330));
+                } else {
+                    charSequence330 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, charSequence330);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F330': "+ unionIndex330));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex331 = (decoder.readIndex());
+        if (unionIndex331 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, null);
+        } else {
+            if (unionIndex331 == 1) {
+                Utf8 charSequence331;
+                Object oldString331 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(331);
+                if (oldString331 instanceof Utf8) {
+                    charSequence331 = (decoder).readString(((Utf8) oldString331));
+                } else {
+                    charSequence331 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, charSequence331);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F331': "+ unionIndex331));
+            }
+        }
+        int unionIndex332 = (decoder.readIndex());
+        if (unionIndex332 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, null);
+        } else {
+            if (unionIndex332 == 1) {
+                Utf8 charSequence332;
+                Object oldString332 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(332);
+                if (oldString332 instanceof Utf8) {
+                    charSequence332 = (decoder).readString(((Utf8) oldString332));
+                } else {
+                    charSequence332 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, charSequence332);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F332': "+ unionIndex332));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex333 = (decoder.readIndex());
+        if (unionIndex333 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, null);
+        } else {
+            if (unionIndex333 == 1) {
+                Utf8 charSequence333;
+                Object oldString333 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(333);
+                if (oldString333 instanceof Utf8) {
+                    charSequence333 = (decoder).readString(((Utf8) oldString333));
+                } else {
+                    charSequence333 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, charSequence333);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F333': "+ unionIndex333));
+            }
+        }
+        int unionIndex334 = (decoder.readIndex());
+        if (unionIndex334 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, null);
+        } else {
+            if (unionIndex334 == 1) {
+                Utf8 charSequence334;
+                Object oldString334 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(334);
+                if (oldString334 instanceof Utf8) {
+                    charSequence334 = (decoder).readString(((Utf8) oldString334));
+                } else {
+                    charSequence334 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, charSequence334);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F334': "+ unionIndex334));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex335 = (decoder.readIndex());
+        if (unionIndex335 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, null);
+        } else {
+            if (unionIndex335 == 1) {
+                Utf8 charSequence335;
+                Object oldString335 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(335);
+                if (oldString335 instanceof Utf8) {
+                    charSequence335 = (decoder).readString(((Utf8) oldString335));
+                } else {
+                    charSequence335 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, charSequence335);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F335': "+ unionIndex335));
+            }
+        }
+        int unionIndex336 = (decoder.readIndex());
+        if (unionIndex336 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, null);
+        } else {
+            if (unionIndex336 == 1) {
+                Utf8 charSequence336;
+                Object oldString336 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(336);
+                if (oldString336 instanceof Utf8) {
+                    charSequence336 = (decoder).readString(((Utf8) oldString336));
+                } else {
+                    charSequence336 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, charSequence336);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F336': "+ unionIndex336));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex337 = (decoder.readIndex());
+        if (unionIndex337 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, null);
+        } else {
+            if (unionIndex337 == 1) {
+                Utf8 charSequence337;
+                Object oldString337 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(337);
+                if (oldString337 instanceof Utf8) {
+                    charSequence337 = (decoder).readString(((Utf8) oldString337));
+                } else {
+                    charSequence337 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, charSequence337);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F337': "+ unionIndex337));
+            }
+        }
+        int unionIndex338 = (decoder.readIndex());
+        if (unionIndex338 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, null);
+        } else {
+            if (unionIndex338 == 1) {
+                Utf8 charSequence338;
+                Object oldString338 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(338);
+                if (oldString338 instanceof Utf8) {
+                    charSequence338 = (decoder).readString(((Utf8) oldString338));
+                } else {
+                    charSequence338 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, charSequence338);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F338': "+ unionIndex338));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex339 = (decoder.readIndex());
+        if (unionIndex339 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, null);
+        } else {
+            if (unionIndex339 == 1) {
+                Utf8 charSequence339;
+                Object oldString339 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(339);
+                if (oldString339 instanceof Utf8) {
+                    charSequence339 = (decoder).readString(((Utf8) oldString339));
+                } else {
+                    charSequence339 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, charSequence339);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F339': "+ unionIndex339));
+            }
+        }
+        int unionIndex340 = (decoder.readIndex());
+        if (unionIndex340 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, null);
+        } else {
+            if (unionIndex340 == 1) {
+                Utf8 charSequence340;
+                Object oldString340 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(340);
+                if (oldString340 instanceof Utf8) {
+                    charSequence340 = (decoder).readString(((Utf8) oldString340));
+                } else {
+                    charSequence340 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, charSequence340);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F340': "+ unionIndex340));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex341 = (decoder.readIndex());
+        if (unionIndex341 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, null);
+        } else {
+            if (unionIndex341 == 1) {
+                Utf8 charSequence341;
+                Object oldString341 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(341);
+                if (oldString341 instanceof Utf8) {
+                    charSequence341 = (decoder).readString(((Utf8) oldString341));
+                } else {
+                    charSequence341 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, charSequence341);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F341': "+ unionIndex341));
+            }
+        }
+        int unionIndex342 = (decoder.readIndex());
+        if (unionIndex342 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, null);
+        } else {
+            if (unionIndex342 == 1) {
+                Utf8 charSequence342;
+                Object oldString342 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(342);
+                if (oldString342 instanceof Utf8) {
+                    charSequence342 = (decoder).readString(((Utf8) oldString342));
+                } else {
+                    charSequence342 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, charSequence342);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F342': "+ unionIndex342));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex343 = (decoder.readIndex());
+        if (unionIndex343 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, null);
+        } else {
+            if (unionIndex343 == 1) {
+                Utf8 charSequence343;
+                Object oldString343 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(343);
+                if (oldString343 instanceof Utf8) {
+                    charSequence343 = (decoder).readString(((Utf8) oldString343));
+                } else {
+                    charSequence343 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, charSequence343);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F343': "+ unionIndex343));
+            }
+        }
+        int unionIndex344 = (decoder.readIndex());
+        if (unionIndex344 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, null);
+        } else {
+            if (unionIndex344 == 1) {
+                Utf8 charSequence344;
+                Object oldString344 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(344);
+                if (oldString344 instanceof Utf8) {
+                    charSequence344 = (decoder).readString(((Utf8) oldString344));
+                } else {
+                    charSequence344 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, charSequence344);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F344': "+ unionIndex344));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex345 = (decoder.readIndex());
+        if (unionIndex345 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, null);
+        } else {
+            if (unionIndex345 == 1) {
+                Utf8 charSequence345;
+                Object oldString345 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(345);
+                if (oldString345 instanceof Utf8) {
+                    charSequence345 = (decoder).readString(((Utf8) oldString345));
+                } else {
+                    charSequence345 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, charSequence345);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F345': "+ unionIndex345));
+            }
+        }
+        int unionIndex346 = (decoder.readIndex());
+        if (unionIndex346 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, null);
+        } else {
+            if (unionIndex346 == 1) {
+                Utf8 charSequence346;
+                Object oldString346 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(346);
+                if (oldString346 instanceof Utf8) {
+                    charSequence346 = (decoder).readString(((Utf8) oldString346));
+                } else {
+                    charSequence346 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, charSequence346);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F346': "+ unionIndex346));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex347 = (decoder.readIndex());
+        if (unionIndex347 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, null);
+        } else {
+            if (unionIndex347 == 1) {
+                Utf8 charSequence347;
+                Object oldString347 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(347);
+                if (oldString347 instanceof Utf8) {
+                    charSequence347 = (decoder).readString(((Utf8) oldString347));
+                } else {
+                    charSequence347 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, charSequence347);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F347': "+ unionIndex347));
+            }
+        }
+        int unionIndex348 = (decoder.readIndex());
+        if (unionIndex348 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, null);
+        } else {
+            if (unionIndex348 == 1) {
+                Utf8 charSequence348;
+                Object oldString348 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(348);
+                if (oldString348 instanceof Utf8) {
+                    charSequence348 = (decoder).readString(((Utf8) oldString348));
+                } else {
+                    charSequence348 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, charSequence348);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F348': "+ unionIndex348));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex349 = (decoder.readIndex());
+        if (unionIndex349 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, null);
+        } else {
+            if (unionIndex349 == 1) {
+                Utf8 charSequence349;
+                Object oldString349 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(349);
+                if (oldString349 instanceof Utf8) {
+                    charSequence349 = (decoder).readString(((Utf8) oldString349));
+                } else {
+                    charSequence349 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, charSequence349);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F349': "+ unionIndex349));
+            }
+        }
+        int unionIndex350 = (decoder.readIndex());
+        if (unionIndex350 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, null);
+        } else {
+            if (unionIndex350 == 1) {
+                Utf8 charSequence350;
+                Object oldString350 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(350);
+                if (oldString350 instanceof Utf8) {
+                    charSequence350 = (decoder).readString(((Utf8) oldString350));
+                } else {
+                    charSequence350 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, charSequence350);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F350': "+ unionIndex350));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex351 = (decoder.readIndex());
+        if (unionIndex351 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, null);
+        } else {
+            if (unionIndex351 == 1) {
+                Utf8 charSequence351;
+                Object oldString351 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(351);
+                if (oldString351 instanceof Utf8) {
+                    charSequence351 = (decoder).readString(((Utf8) oldString351));
+                } else {
+                    charSequence351 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, charSequence351);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F351': "+ unionIndex351));
+            }
+        }
+        int unionIndex352 = (decoder.readIndex());
+        if (unionIndex352 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, null);
+        } else {
+            if (unionIndex352 == 1) {
+                Utf8 charSequence352;
+                Object oldString352 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(352);
+                if (oldString352 instanceof Utf8) {
+                    charSequence352 = (decoder).readString(((Utf8) oldString352));
+                } else {
+                    charSequence352 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, charSequence352);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F352': "+ unionIndex352));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex353 = (decoder.readIndex());
+        if (unionIndex353 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, null);
+        } else {
+            if (unionIndex353 == 1) {
+                Utf8 charSequence353;
+                Object oldString353 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(353);
+                if (oldString353 instanceof Utf8) {
+                    charSequence353 = (decoder).readString(((Utf8) oldString353));
+                } else {
+                    charSequence353 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, charSequence353);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F353': "+ unionIndex353));
+            }
+        }
+        int unionIndex354 = (decoder.readIndex());
+        if (unionIndex354 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, null);
+        } else {
+            if (unionIndex354 == 1) {
+                Utf8 charSequence354;
+                Object oldString354 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(354);
+                if (oldString354 instanceof Utf8) {
+                    charSequence354 = (decoder).readString(((Utf8) oldString354));
+                } else {
+                    charSequence354 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, charSequence354);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F354': "+ unionIndex354));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex355 = (decoder.readIndex());
+        if (unionIndex355 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, null);
+        } else {
+            if (unionIndex355 == 1) {
+                Utf8 charSequence355;
+                Object oldString355 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(355);
+                if (oldString355 instanceof Utf8) {
+                    charSequence355 = (decoder).readString(((Utf8) oldString355));
+                } else {
+                    charSequence355 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, charSequence355);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F355': "+ unionIndex355));
+            }
+        }
+        int unionIndex356 = (decoder.readIndex());
+        if (unionIndex356 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, null);
+        } else {
+            if (unionIndex356 == 1) {
+                Utf8 charSequence356;
+                Object oldString356 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(356);
+                if (oldString356 instanceof Utf8) {
+                    charSequence356 = (decoder).readString(((Utf8) oldString356));
+                } else {
+                    charSequence356 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, charSequence356);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F356': "+ unionIndex356));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex357 = (decoder.readIndex());
+        if (unionIndex357 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, null);
+        } else {
+            if (unionIndex357 == 1) {
+                Utf8 charSequence357;
+                Object oldString357 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(357);
+                if (oldString357 instanceof Utf8) {
+                    charSequence357 = (decoder).readString(((Utf8) oldString357));
+                } else {
+                    charSequence357 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, charSequence357);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F357': "+ unionIndex357));
+            }
+        }
+        int unionIndex358 = (decoder.readIndex());
+        if (unionIndex358 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, null);
+        } else {
+            if (unionIndex358 == 1) {
+                Utf8 charSequence358;
+                Object oldString358 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(358);
+                if (oldString358 instanceof Utf8) {
+                    charSequence358 = (decoder).readString(((Utf8) oldString358));
+                } else {
+                    charSequence358 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, charSequence358);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F358': "+ unionIndex358));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex359 = (decoder.readIndex());
+        if (unionIndex359 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, null);
+        } else {
+            if (unionIndex359 == 1) {
+                Utf8 charSequence359;
+                Object oldString359 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(359);
+                if (oldString359 instanceof Utf8) {
+                    charSequence359 = (decoder).readString(((Utf8) oldString359));
+                } else {
+                    charSequence359 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, charSequence359);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F359': "+ unionIndex359));
+            }
+        }
+        int unionIndex360 = (decoder.readIndex());
+        if (unionIndex360 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, null);
+        } else {
+            if (unionIndex360 == 1) {
+                Utf8 charSequence360;
+                Object oldString360 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(360);
+                if (oldString360 instanceof Utf8) {
+                    charSequence360 = (decoder).readString(((Utf8) oldString360));
+                } else {
+                    charSequence360 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, charSequence360);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F360': "+ unionIndex360));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex361 = (decoder.readIndex());
+        if (unionIndex361 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, null);
+        } else {
+            if (unionIndex361 == 1) {
+                Utf8 charSequence361;
+                Object oldString361 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(361);
+                if (oldString361 instanceof Utf8) {
+                    charSequence361 = (decoder).readString(((Utf8) oldString361));
+                } else {
+                    charSequence361 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, charSequence361);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F361': "+ unionIndex361));
+            }
+        }
+        int unionIndex362 = (decoder.readIndex());
+        if (unionIndex362 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, null);
+        } else {
+            if (unionIndex362 == 1) {
+                Utf8 charSequence362;
+                Object oldString362 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(362);
+                if (oldString362 instanceof Utf8) {
+                    charSequence362 = (decoder).readString(((Utf8) oldString362));
+                } else {
+                    charSequence362 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, charSequence362);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F362': "+ unionIndex362));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex363 = (decoder.readIndex());
+        if (unionIndex363 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, null);
+        } else {
+            if (unionIndex363 == 1) {
+                Utf8 charSequence363;
+                Object oldString363 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(363);
+                if (oldString363 instanceof Utf8) {
+                    charSequence363 = (decoder).readString(((Utf8) oldString363));
+                } else {
+                    charSequence363 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, charSequence363);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F363': "+ unionIndex363));
+            }
+        }
+        int unionIndex364 = (decoder.readIndex());
+        if (unionIndex364 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, null);
+        } else {
+            if (unionIndex364 == 1) {
+                Utf8 charSequence364;
+                Object oldString364 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(364);
+                if (oldString364 instanceof Utf8) {
+                    charSequence364 = (decoder).readString(((Utf8) oldString364));
+                } else {
+                    charSequence364 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, charSequence364);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F364': "+ unionIndex364));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex365 = (decoder.readIndex());
+        if (unionIndex365 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, null);
+        } else {
+            if (unionIndex365 == 1) {
+                Utf8 charSequence365;
+                Object oldString365 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(365);
+                if (oldString365 instanceof Utf8) {
+                    charSequence365 = (decoder).readString(((Utf8) oldString365));
+                } else {
+                    charSequence365 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, charSequence365);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F365': "+ unionIndex365));
+            }
+        }
+        int unionIndex366 = (decoder.readIndex());
+        if (unionIndex366 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, null);
+        } else {
+            if (unionIndex366 == 1) {
+                Utf8 charSequence366;
+                Object oldString366 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(366);
+                if (oldString366 instanceof Utf8) {
+                    charSequence366 = (decoder).readString(((Utf8) oldString366));
+                } else {
+                    charSequence366 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, charSequence366);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F366': "+ unionIndex366));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex367 = (decoder.readIndex());
+        if (unionIndex367 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, null);
+        } else {
+            if (unionIndex367 == 1) {
+                Utf8 charSequence367;
+                Object oldString367 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(367);
+                if (oldString367 instanceof Utf8) {
+                    charSequence367 = (decoder).readString(((Utf8) oldString367));
+                } else {
+                    charSequence367 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, charSequence367);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F367': "+ unionIndex367));
+            }
+        }
+        int unionIndex368 = (decoder.readIndex());
+        if (unionIndex368 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, null);
+        } else {
+            if (unionIndex368 == 1) {
+                Utf8 charSequence368;
+                Object oldString368 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(368);
+                if (oldString368 instanceof Utf8) {
+                    charSequence368 = (decoder).readString(((Utf8) oldString368));
+                } else {
+                    charSequence368 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, charSequence368);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F368': "+ unionIndex368));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex369 = (decoder.readIndex());
+        if (unionIndex369 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, null);
+        } else {
+            if (unionIndex369 == 1) {
+                Utf8 charSequence369;
+                Object oldString369 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(369);
+                if (oldString369 instanceof Utf8) {
+                    charSequence369 = (decoder).readString(((Utf8) oldString369));
+                } else {
+                    charSequence369 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, charSequence369);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F369': "+ unionIndex369));
+            }
+        }
+        int unionIndex370 = (decoder.readIndex());
+        if (unionIndex370 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, null);
+        } else {
+            if (unionIndex370 == 1) {
+                Utf8 charSequence370;
+                Object oldString370 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(370);
+                if (oldString370 instanceof Utf8) {
+                    charSequence370 = (decoder).readString(((Utf8) oldString370));
+                } else {
+                    charSequence370 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, charSequence370);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F370': "+ unionIndex370));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex371 = (decoder.readIndex());
+        if (unionIndex371 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, null);
+        } else {
+            if (unionIndex371 == 1) {
+                Utf8 charSequence371;
+                Object oldString371 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(371);
+                if (oldString371 instanceof Utf8) {
+                    charSequence371 = (decoder).readString(((Utf8) oldString371));
+                } else {
+                    charSequence371 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, charSequence371);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F371': "+ unionIndex371));
+            }
+        }
+        int unionIndex372 = (decoder.readIndex());
+        if (unionIndex372 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, null);
+        } else {
+            if (unionIndex372 == 1) {
+                Utf8 charSequence372;
+                Object oldString372 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(372);
+                if (oldString372 instanceof Utf8) {
+                    charSequence372 = (decoder).readString(((Utf8) oldString372));
+                } else {
+                    charSequence372 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, charSequence372);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F372': "+ unionIndex372));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex373 = (decoder.readIndex());
+        if (unionIndex373 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, null);
+        } else {
+            if (unionIndex373 == 1) {
+                Utf8 charSequence373;
+                Object oldString373 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(373);
+                if (oldString373 instanceof Utf8) {
+                    charSequence373 = (decoder).readString(((Utf8) oldString373));
+                } else {
+                    charSequence373 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, charSequence373);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F373': "+ unionIndex373));
+            }
+        }
+        int unionIndex374 = (decoder.readIndex());
+        if (unionIndex374 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, null);
+        } else {
+            if (unionIndex374 == 1) {
+                Utf8 charSequence374;
+                Object oldString374 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(374);
+                if (oldString374 instanceof Utf8) {
+                    charSequence374 = (decoder).readString(((Utf8) oldString374));
+                } else {
+                    charSequence374 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, charSequence374);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F374': "+ unionIndex374));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex375 = (decoder.readIndex());
+        if (unionIndex375 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, null);
+        } else {
+            if (unionIndex375 == 1) {
+                Utf8 charSequence375;
+                Object oldString375 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(375);
+                if (oldString375 instanceof Utf8) {
+                    charSequence375 = (decoder).readString(((Utf8) oldString375));
+                } else {
+                    charSequence375 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, charSequence375);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F375': "+ unionIndex375));
+            }
+        }
+        int unionIndex376 = (decoder.readIndex());
+        if (unionIndex376 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, null);
+        } else {
+            if (unionIndex376 == 1) {
+                Utf8 charSequence376;
+                Object oldString376 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(376);
+                if (oldString376 instanceof Utf8) {
+                    charSequence376 = (decoder).readString(((Utf8) oldString376));
+                } else {
+                    charSequence376 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, charSequence376);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F376': "+ unionIndex376));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex377 = (decoder.readIndex());
+        if (unionIndex377 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, null);
+        } else {
+            if (unionIndex377 == 1) {
+                Utf8 charSequence377;
+                Object oldString377 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(377);
+                if (oldString377 instanceof Utf8) {
+                    charSequence377 = (decoder).readString(((Utf8) oldString377));
+                } else {
+                    charSequence377 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, charSequence377);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F377': "+ unionIndex377));
+            }
+        }
+        int unionIndex378 = (decoder.readIndex());
+        if (unionIndex378 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, null);
+        } else {
+            if (unionIndex378 == 1) {
+                Utf8 charSequence378;
+                Object oldString378 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(378);
+                if (oldString378 instanceof Utf8) {
+                    charSequence378 = (decoder).readString(((Utf8) oldString378));
+                } else {
+                    charSequence378 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, charSequence378);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F378': "+ unionIndex378));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex379 = (decoder.readIndex());
+        if (unionIndex379 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, null);
+        } else {
+            if (unionIndex379 == 1) {
+                Utf8 charSequence379;
+                Object oldString379 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(379);
+                if (oldString379 instanceof Utf8) {
+                    charSequence379 = (decoder).readString(((Utf8) oldString379));
+                } else {
+                    charSequence379 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, charSequence379);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F379': "+ unionIndex379));
+            }
+        }
+        int unionIndex380 = (decoder.readIndex());
+        if (unionIndex380 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, null);
+        } else {
+            if (unionIndex380 == 1) {
+                Utf8 charSequence380;
+                Object oldString380 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(380);
+                if (oldString380 instanceof Utf8) {
+                    charSequence380 = (decoder).readString(((Utf8) oldString380));
+                } else {
+                    charSequence380 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, charSequence380);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F380': "+ unionIndex380));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex381 = (decoder.readIndex());
+        if (unionIndex381 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, null);
+        } else {
+            if (unionIndex381 == 1) {
+                Utf8 charSequence381;
+                Object oldString381 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(381);
+                if (oldString381 instanceof Utf8) {
+                    charSequence381 = (decoder).readString(((Utf8) oldString381));
+                } else {
+                    charSequence381 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, charSequence381);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F381': "+ unionIndex381));
+            }
+        }
+        int unionIndex382 = (decoder.readIndex());
+        if (unionIndex382 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, null);
+        } else {
+            if (unionIndex382 == 1) {
+                Utf8 charSequence382;
+                Object oldString382 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(382);
+                if (oldString382 instanceof Utf8) {
+                    charSequence382 = (decoder).readString(((Utf8) oldString382));
+                } else {
+                    charSequence382 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, charSequence382);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F382': "+ unionIndex382));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex383 = (decoder.readIndex());
+        if (unionIndex383 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, null);
+        } else {
+            if (unionIndex383 == 1) {
+                Utf8 charSequence383;
+                Object oldString383 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(383);
+                if (oldString383 instanceof Utf8) {
+                    charSequence383 = (decoder).readString(((Utf8) oldString383));
+                } else {
+                    charSequence383 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, charSequence383);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F383': "+ unionIndex383));
+            }
+        }
+        int unionIndex384 = (decoder.readIndex());
+        if (unionIndex384 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, null);
+        } else {
+            if (unionIndex384 == 1) {
+                Utf8 charSequence384;
+                Object oldString384 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(384);
+                if (oldString384 instanceof Utf8) {
+                    charSequence384 = (decoder).readString(((Utf8) oldString384));
+                } else {
+                    charSequence384 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, charSequence384);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F384': "+ unionIndex384));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex385 = (decoder.readIndex());
+        if (unionIndex385 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, null);
+        } else {
+            if (unionIndex385 == 1) {
+                Utf8 charSequence385;
+                Object oldString385 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(385);
+                if (oldString385 instanceof Utf8) {
+                    charSequence385 = (decoder).readString(((Utf8) oldString385));
+                } else {
+                    charSequence385 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, charSequence385);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F385': "+ unionIndex385));
+            }
+        }
+        int unionIndex386 = (decoder.readIndex());
+        if (unionIndex386 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, null);
+        } else {
+            if (unionIndex386 == 1) {
+                Utf8 charSequence386;
+                Object oldString386 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(386);
+                if (oldString386 instanceof Utf8) {
+                    charSequence386 = (decoder).readString(((Utf8) oldString386));
+                } else {
+                    charSequence386 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, charSequence386);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F386': "+ unionIndex386));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex387 = (decoder.readIndex());
+        if (unionIndex387 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, null);
+        } else {
+            if (unionIndex387 == 1) {
+                Utf8 charSequence387;
+                Object oldString387 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(387);
+                if (oldString387 instanceof Utf8) {
+                    charSequence387 = (decoder).readString(((Utf8) oldString387));
+                } else {
+                    charSequence387 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, charSequence387);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F387': "+ unionIndex387));
+            }
+        }
+        int unionIndex388 = (decoder.readIndex());
+        if (unionIndex388 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, null);
+        } else {
+            if (unionIndex388 == 1) {
+                Utf8 charSequence388;
+                Object oldString388 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(388);
+                if (oldString388 instanceof Utf8) {
+                    charSequence388 = (decoder).readString(((Utf8) oldString388));
+                } else {
+                    charSequence388 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, charSequence388);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F388': "+ unionIndex388));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex389 = (decoder.readIndex());
+        if (unionIndex389 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, null);
+        } else {
+            if (unionIndex389 == 1) {
+                Utf8 charSequence389;
+                Object oldString389 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(389);
+                if (oldString389 instanceof Utf8) {
+                    charSequence389 = (decoder).readString(((Utf8) oldString389));
+                } else {
+                    charSequence389 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, charSequence389);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F389': "+ unionIndex389));
+            }
+        }
+        int unionIndex390 = (decoder.readIndex());
+        if (unionIndex390 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, null);
+        } else {
+            if (unionIndex390 == 1) {
+                Utf8 charSequence390;
+                Object oldString390 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(390);
+                if (oldString390 instanceof Utf8) {
+                    charSequence390 = (decoder).readString(((Utf8) oldString390));
+                } else {
+                    charSequence390 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, charSequence390);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F390': "+ unionIndex390));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex391 = (decoder.readIndex());
+        if (unionIndex391 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, null);
+        } else {
+            if (unionIndex391 == 1) {
+                Utf8 charSequence391;
+                Object oldString391 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(391);
+                if (oldString391 instanceof Utf8) {
+                    charSequence391 = (decoder).readString(((Utf8) oldString391));
+                } else {
+                    charSequence391 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, charSequence391);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F391': "+ unionIndex391));
+            }
+        }
+        int unionIndex392 = (decoder.readIndex());
+        if (unionIndex392 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, null);
+        } else {
+            if (unionIndex392 == 1) {
+                Utf8 charSequence392;
+                Object oldString392 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(392);
+                if (oldString392 instanceof Utf8) {
+                    charSequence392 = (decoder).readString(((Utf8) oldString392));
+                } else {
+                    charSequence392 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, charSequence392);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F392': "+ unionIndex392));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex393 = (decoder.readIndex());
+        if (unionIndex393 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, null);
+        } else {
+            if (unionIndex393 == 1) {
+                Utf8 charSequence393;
+                Object oldString393 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(393);
+                if (oldString393 instanceof Utf8) {
+                    charSequence393 = (decoder).readString(((Utf8) oldString393));
+                } else {
+                    charSequence393 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, charSequence393);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F393': "+ unionIndex393));
+            }
+        }
+        int unionIndex394 = (decoder.readIndex());
+        if (unionIndex394 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, null);
+        } else {
+            if (unionIndex394 == 1) {
+                Utf8 charSequence394;
+                Object oldString394 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(394);
+                if (oldString394 instanceof Utf8) {
+                    charSequence394 = (decoder).readString(((Utf8) oldString394));
+                } else {
+                    charSequence394 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, charSequence394);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F394': "+ unionIndex394));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex395 = (decoder.readIndex());
+        if (unionIndex395 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, null);
+        } else {
+            if (unionIndex395 == 1) {
+                Utf8 charSequence395;
+                Object oldString395 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(395);
+                if (oldString395 instanceof Utf8) {
+                    charSequence395 = (decoder).readString(((Utf8) oldString395));
+                } else {
+                    charSequence395 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, charSequence395);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F395': "+ unionIndex395));
+            }
+        }
+        int unionIndex396 = (decoder.readIndex());
+        if (unionIndex396 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, null);
+        } else {
+            if (unionIndex396 == 1) {
+                Utf8 charSequence396;
+                Object oldString396 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(396);
+                if (oldString396 instanceof Utf8) {
+                    charSequence396 = (decoder).readString(((Utf8) oldString396));
+                } else {
+                    charSequence396 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, charSequence396);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F396': "+ unionIndex396));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex397 = (decoder.readIndex());
+        if (unionIndex397 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, null);
+        } else {
+            if (unionIndex397 == 1) {
+                Utf8 charSequence397;
+                Object oldString397 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(397);
+                if (oldString397 instanceof Utf8) {
+                    charSequence397 = (decoder).readString(((Utf8) oldString397));
+                } else {
+                    charSequence397 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, charSequence397);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F397': "+ unionIndex397));
+            }
+        }
+        int unionIndex398 = (decoder.readIndex());
+        if (unionIndex398 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, null);
+        } else {
+            if (unionIndex398 == 1) {
+                Utf8 charSequence398;
+                Object oldString398 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(398);
+                if (oldString398 instanceof Utf8) {
+                    charSequence398 = (decoder).readString(((Utf8) oldString398));
+                } else {
+                    charSequence398 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, charSequence398);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F398': "+ unionIndex398));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex399 = (decoder.readIndex());
+        if (unionIndex399 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, null);
+        } else {
+            if (unionIndex399 == 1) {
+                Utf8 charSequence399;
+                Object oldString399 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(399);
+                if (oldString399 instanceof Utf8) {
+                    charSequence399 = (decoder).readString(((Utf8) oldString399));
+                } else {
+                    charSequence399 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, charSequence399);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F399': "+ unionIndex399));
+            }
+        }
+        int unionIndex400 = (decoder.readIndex());
+        if (unionIndex400 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, null);
+        } else {
+            if (unionIndex400 == 1) {
+                Utf8 charSequence400;
+                Object oldString400 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(400);
+                if (oldString400 instanceof Utf8) {
+                    charSequence400 = (decoder).readString(((Utf8) oldString400));
+                } else {
+                    charSequence400 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, charSequence400);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F400': "+ unionIndex400));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex401 = (decoder.readIndex());
+        if (unionIndex401 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, null);
+        } else {
+            if (unionIndex401 == 1) {
+                Utf8 charSequence401;
+                Object oldString401 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(401);
+                if (oldString401 instanceof Utf8) {
+                    charSequence401 = (decoder).readString(((Utf8) oldString401));
+                } else {
+                    charSequence401 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, charSequence401);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F401': "+ unionIndex401));
+            }
+        }
+        int unionIndex402 = (decoder.readIndex());
+        if (unionIndex402 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, null);
+        } else {
+            if (unionIndex402 == 1) {
+                Utf8 charSequence402;
+                Object oldString402 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(402);
+                if (oldString402 instanceof Utf8) {
+                    charSequence402 = (decoder).readString(((Utf8) oldString402));
+                } else {
+                    charSequence402 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, charSequence402);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F402': "+ unionIndex402));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex403 = (decoder.readIndex());
+        if (unionIndex403 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, null);
+        } else {
+            if (unionIndex403 == 1) {
+                Utf8 charSequence403;
+                Object oldString403 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(403);
+                if (oldString403 instanceof Utf8) {
+                    charSequence403 = (decoder).readString(((Utf8) oldString403));
+                } else {
+                    charSequence403 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, charSequence403);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F403': "+ unionIndex403));
+            }
+        }
+        int unionIndex404 = (decoder.readIndex());
+        if (unionIndex404 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, null);
+        } else {
+            if (unionIndex404 == 1) {
+                Utf8 charSequence404;
+                Object oldString404 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(404);
+                if (oldString404 instanceof Utf8) {
+                    charSequence404 = (decoder).readString(((Utf8) oldString404));
+                } else {
+                    charSequence404 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, charSequence404);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F404': "+ unionIndex404));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex405 = (decoder.readIndex());
+        if (unionIndex405 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, null);
+        } else {
+            if (unionIndex405 == 1) {
+                Utf8 charSequence405;
+                Object oldString405 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(405);
+                if (oldString405 instanceof Utf8) {
+                    charSequence405 = (decoder).readString(((Utf8) oldString405));
+                } else {
+                    charSequence405 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, charSequence405);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F405': "+ unionIndex405));
+            }
+        }
+        int unionIndex406 = (decoder.readIndex());
+        if (unionIndex406 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, null);
+        } else {
+            if (unionIndex406 == 1) {
+                Utf8 charSequence406;
+                Object oldString406 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(406);
+                if (oldString406 instanceof Utf8) {
+                    charSequence406 = (decoder).readString(((Utf8) oldString406));
+                } else {
+                    charSequence406 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, charSequence406);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F406': "+ unionIndex406));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex407 = (decoder.readIndex());
+        if (unionIndex407 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, null);
+        } else {
+            if (unionIndex407 == 1) {
+                Utf8 charSequence407;
+                Object oldString407 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(407);
+                if (oldString407 instanceof Utf8) {
+                    charSequence407 = (decoder).readString(((Utf8) oldString407));
+                } else {
+                    charSequence407 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, charSequence407);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F407': "+ unionIndex407));
+            }
+        }
+        int unionIndex408 = (decoder.readIndex());
+        if (unionIndex408 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, null);
+        } else {
+            if (unionIndex408 == 1) {
+                Utf8 charSequence408;
+                Object oldString408 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(408);
+                if (oldString408 instanceof Utf8) {
+                    charSequence408 = (decoder).readString(((Utf8) oldString408));
+                } else {
+                    charSequence408 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, charSequence408);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F408': "+ unionIndex408));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex409 = (decoder.readIndex());
+        if (unionIndex409 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, null);
+        } else {
+            if (unionIndex409 == 1) {
+                Utf8 charSequence409;
+                Object oldString409 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(409);
+                if (oldString409 instanceof Utf8) {
+                    charSequence409 = (decoder).readString(((Utf8) oldString409));
+                } else {
+                    charSequence409 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, charSequence409);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F409': "+ unionIndex409));
+            }
+        }
+        int unionIndex410 = (decoder.readIndex());
+        if (unionIndex410 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, null);
+        } else {
+            if (unionIndex410 == 1) {
+                Utf8 charSequence410;
+                Object oldString410 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(410);
+                if (oldString410 instanceof Utf8) {
+                    charSequence410 = (decoder).readString(((Utf8) oldString410));
+                } else {
+                    charSequence410 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, charSequence410);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F410': "+ unionIndex410));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex411 = (decoder.readIndex());
+        if (unionIndex411 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, null);
+        } else {
+            if (unionIndex411 == 1) {
+                Utf8 charSequence411;
+                Object oldString411 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(411);
+                if (oldString411 instanceof Utf8) {
+                    charSequence411 = (decoder).readString(((Utf8) oldString411));
+                } else {
+                    charSequence411 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, charSequence411);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F411': "+ unionIndex411));
+            }
+        }
+        int unionIndex412 = (decoder.readIndex());
+        if (unionIndex412 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, null);
+        } else {
+            if (unionIndex412 == 1) {
+                Utf8 charSequence412;
+                Object oldString412 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(412);
+                if (oldString412 instanceof Utf8) {
+                    charSequence412 = (decoder).readString(((Utf8) oldString412));
+                } else {
+                    charSequence412 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, charSequence412);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F412': "+ unionIndex412));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex413 = (decoder.readIndex());
+        if (unionIndex413 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, null);
+        } else {
+            if (unionIndex413 == 1) {
+                Utf8 charSequence413;
+                Object oldString413 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(413);
+                if (oldString413 instanceof Utf8) {
+                    charSequence413 = (decoder).readString(((Utf8) oldString413));
+                } else {
+                    charSequence413 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, charSequence413);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F413': "+ unionIndex413));
+            }
+        }
+        int unionIndex414 = (decoder.readIndex());
+        if (unionIndex414 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, null);
+        } else {
+            if (unionIndex414 == 1) {
+                Utf8 charSequence414;
+                Object oldString414 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(414);
+                if (oldString414 instanceof Utf8) {
+                    charSequence414 = (decoder).readString(((Utf8) oldString414));
+                } else {
+                    charSequence414 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, charSequence414);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F414': "+ unionIndex414));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex415 = (decoder.readIndex());
+        if (unionIndex415 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, null);
+        } else {
+            if (unionIndex415 == 1) {
+                Utf8 charSequence415;
+                Object oldString415 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(415);
+                if (oldString415 instanceof Utf8) {
+                    charSequence415 = (decoder).readString(((Utf8) oldString415));
+                } else {
+                    charSequence415 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, charSequence415);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F415': "+ unionIndex415));
+            }
+        }
+        int unionIndex416 = (decoder.readIndex());
+        if (unionIndex416 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, null);
+        } else {
+            if (unionIndex416 == 1) {
+                Utf8 charSequence416;
+                Object oldString416 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(416);
+                if (oldString416 instanceof Utf8) {
+                    charSequence416 = (decoder).readString(((Utf8) oldString416));
+                } else {
+                    charSequence416 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, charSequence416);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F416': "+ unionIndex416));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex417 = (decoder.readIndex());
+        if (unionIndex417 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, null);
+        } else {
+            if (unionIndex417 == 1) {
+                Utf8 charSequence417;
+                Object oldString417 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(417);
+                if (oldString417 instanceof Utf8) {
+                    charSequence417 = (decoder).readString(((Utf8) oldString417));
+                } else {
+                    charSequence417 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, charSequence417);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F417': "+ unionIndex417));
+            }
+        }
+        int unionIndex418 = (decoder.readIndex());
+        if (unionIndex418 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, null);
+        } else {
+            if (unionIndex418 == 1) {
+                Utf8 charSequence418;
+                Object oldString418 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(418);
+                if (oldString418 instanceof Utf8) {
+                    charSequence418 = (decoder).readString(((Utf8) oldString418));
+                } else {
+                    charSequence418 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, charSequence418);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F418': "+ unionIndex418));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex419 = (decoder.readIndex());
+        if (unionIndex419 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, null);
+        } else {
+            if (unionIndex419 == 1) {
+                Utf8 charSequence419;
+                Object oldString419 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(419);
+                if (oldString419 instanceof Utf8) {
+                    charSequence419 = (decoder).readString(((Utf8) oldString419));
+                } else {
+                    charSequence419 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, charSequence419);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F419': "+ unionIndex419));
+            }
+        }
+        int unionIndex420 = (decoder.readIndex());
+        if (unionIndex420 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, null);
+        } else {
+            if (unionIndex420 == 1) {
+                Utf8 charSequence420;
+                Object oldString420 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(420);
+                if (oldString420 instanceof Utf8) {
+                    charSequence420 = (decoder).readString(((Utf8) oldString420));
+                } else {
+                    charSequence420 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, charSequence420);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F420': "+ unionIndex420));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex421 = (decoder.readIndex());
+        if (unionIndex421 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, null);
+        } else {
+            if (unionIndex421 == 1) {
+                Utf8 charSequence421;
+                Object oldString421 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(421);
+                if (oldString421 instanceof Utf8) {
+                    charSequence421 = (decoder).readString(((Utf8) oldString421));
+                } else {
+                    charSequence421 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, charSequence421);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F421': "+ unionIndex421));
+            }
+        }
+        int unionIndex422 = (decoder.readIndex());
+        if (unionIndex422 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, null);
+        } else {
+            if (unionIndex422 == 1) {
+                Utf8 charSequence422;
+                Object oldString422 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(422);
+                if (oldString422 instanceof Utf8) {
+                    charSequence422 = (decoder).readString(((Utf8) oldString422));
+                } else {
+                    charSequence422 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, charSequence422);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F422': "+ unionIndex422));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex423 = (decoder.readIndex());
+        if (unionIndex423 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, null);
+        } else {
+            if (unionIndex423 == 1) {
+                Utf8 charSequence423;
+                Object oldString423 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(423);
+                if (oldString423 instanceof Utf8) {
+                    charSequence423 = (decoder).readString(((Utf8) oldString423));
+                } else {
+                    charSequence423 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, charSequence423);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F423': "+ unionIndex423));
+            }
+        }
+        int unionIndex424 = (decoder.readIndex());
+        if (unionIndex424 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, null);
+        } else {
+            if (unionIndex424 == 1) {
+                Utf8 charSequence424;
+                Object oldString424 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(424);
+                if (oldString424 instanceof Utf8) {
+                    charSequence424 = (decoder).readString(((Utf8) oldString424));
+                } else {
+                    charSequence424 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, charSequence424);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F424': "+ unionIndex424));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex425 = (decoder.readIndex());
+        if (unionIndex425 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, null);
+        } else {
+            if (unionIndex425 == 1) {
+                Utf8 charSequence425;
+                Object oldString425 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(425);
+                if (oldString425 instanceof Utf8) {
+                    charSequence425 = (decoder).readString(((Utf8) oldString425));
+                } else {
+                    charSequence425 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, charSequence425);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F425': "+ unionIndex425));
+            }
+        }
+        int unionIndex426 = (decoder.readIndex());
+        if (unionIndex426 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, null);
+        } else {
+            if (unionIndex426 == 1) {
+                Utf8 charSequence426;
+                Object oldString426 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(426);
+                if (oldString426 instanceof Utf8) {
+                    charSequence426 = (decoder).readString(((Utf8) oldString426));
+                } else {
+                    charSequence426 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, charSequence426);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F426': "+ unionIndex426));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex427 = (decoder.readIndex());
+        if (unionIndex427 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, null);
+        } else {
+            if (unionIndex427 == 1) {
+                Utf8 charSequence427;
+                Object oldString427 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(427);
+                if (oldString427 instanceof Utf8) {
+                    charSequence427 = (decoder).readString(((Utf8) oldString427));
+                } else {
+                    charSequence427 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, charSequence427);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F427': "+ unionIndex427));
+            }
+        }
+        int unionIndex428 = (decoder.readIndex());
+        if (unionIndex428 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, null);
+        } else {
+            if (unionIndex428 == 1) {
+                Utf8 charSequence428;
+                Object oldString428 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(428);
+                if (oldString428 instanceof Utf8) {
+                    charSequence428 = (decoder).readString(((Utf8) oldString428));
+                } else {
+                    charSequence428 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, charSequence428);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F428': "+ unionIndex428));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex429 = (decoder.readIndex());
+        if (unionIndex429 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, null);
+        } else {
+            if (unionIndex429 == 1) {
+                Utf8 charSequence429;
+                Object oldString429 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(429);
+                if (oldString429 instanceof Utf8) {
+                    charSequence429 = (decoder).readString(((Utf8) oldString429));
+                } else {
+                    charSequence429 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, charSequence429);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F429': "+ unionIndex429));
+            }
+        }
+        int unionIndex430 = (decoder.readIndex());
+        if (unionIndex430 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, null);
+        } else {
+            if (unionIndex430 == 1) {
+                Utf8 charSequence430;
+                Object oldString430 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(430);
+                if (oldString430 instanceof Utf8) {
+                    charSequence430 = (decoder).readString(((Utf8) oldString430));
+                } else {
+                    charSequence430 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, charSequence430);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F430': "+ unionIndex430));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex431 = (decoder.readIndex());
+        if (unionIndex431 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, null);
+        } else {
+            if (unionIndex431 == 1) {
+                Utf8 charSequence431;
+                Object oldString431 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(431);
+                if (oldString431 instanceof Utf8) {
+                    charSequence431 = (decoder).readString(((Utf8) oldString431));
+                } else {
+                    charSequence431 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, charSequence431);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F431': "+ unionIndex431));
+            }
+        }
+        int unionIndex432 = (decoder.readIndex());
+        if (unionIndex432 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, null);
+        } else {
+            if (unionIndex432 == 1) {
+                Utf8 charSequence432;
+                Object oldString432 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(432);
+                if (oldString432 instanceof Utf8) {
+                    charSequence432 = (decoder).readString(((Utf8) oldString432));
+                } else {
+                    charSequence432 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, charSequence432);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F432': "+ unionIndex432));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex433 = (decoder.readIndex());
+        if (unionIndex433 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, null);
+        } else {
+            if (unionIndex433 == 1) {
+                Utf8 charSequence433;
+                Object oldString433 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(433);
+                if (oldString433 instanceof Utf8) {
+                    charSequence433 = (decoder).readString(((Utf8) oldString433));
+                } else {
+                    charSequence433 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, charSequence433);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F433': "+ unionIndex433));
+            }
+        }
+        int unionIndex434 = (decoder.readIndex());
+        if (unionIndex434 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, null);
+        } else {
+            if (unionIndex434 == 1) {
+                Utf8 charSequence434;
+                Object oldString434 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(434);
+                if (oldString434 instanceof Utf8) {
+                    charSequence434 = (decoder).readString(((Utf8) oldString434));
+                } else {
+                    charSequence434 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, charSequence434);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F434': "+ unionIndex434));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex435 = (decoder.readIndex());
+        if (unionIndex435 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, null);
+        } else {
+            if (unionIndex435 == 1) {
+                Utf8 charSequence435;
+                Object oldString435 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(435);
+                if (oldString435 instanceof Utf8) {
+                    charSequence435 = (decoder).readString(((Utf8) oldString435));
+                } else {
+                    charSequence435 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, charSequence435);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F435': "+ unionIndex435));
+            }
+        }
+        int unionIndex436 = (decoder.readIndex());
+        if (unionIndex436 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, null);
+        } else {
+            if (unionIndex436 == 1) {
+                Utf8 charSequence436;
+                Object oldString436 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(436);
+                if (oldString436 instanceof Utf8) {
+                    charSequence436 = (decoder).readString(((Utf8) oldString436));
+                } else {
+                    charSequence436 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, charSequence436);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F436': "+ unionIndex436));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex437 = (decoder.readIndex());
+        if (unionIndex437 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, null);
+        } else {
+            if (unionIndex437 == 1) {
+                Utf8 charSequence437;
+                Object oldString437 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(437);
+                if (oldString437 instanceof Utf8) {
+                    charSequence437 = (decoder).readString(((Utf8) oldString437));
+                } else {
+                    charSequence437 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, charSequence437);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F437': "+ unionIndex437));
+            }
+        }
+        int unionIndex438 = (decoder.readIndex());
+        if (unionIndex438 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, null);
+        } else {
+            if (unionIndex438 == 1) {
+                Utf8 charSequence438;
+                Object oldString438 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(438);
+                if (oldString438 instanceof Utf8) {
+                    charSequence438 = (decoder).readString(((Utf8) oldString438));
+                } else {
+                    charSequence438 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, charSequence438);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F438': "+ unionIndex438));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex439 = (decoder.readIndex());
+        if (unionIndex439 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, null);
+        } else {
+            if (unionIndex439 == 1) {
+                Utf8 charSequence439;
+                Object oldString439 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(439);
+                if (oldString439 instanceof Utf8) {
+                    charSequence439 = (decoder).readString(((Utf8) oldString439));
+                } else {
+                    charSequence439 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, charSequence439);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F439': "+ unionIndex439));
+            }
+        }
+        int unionIndex440 = (decoder.readIndex());
+        if (unionIndex440 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, null);
+        } else {
+            if (unionIndex440 == 1) {
+                Utf8 charSequence440;
+                Object oldString440 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(440);
+                if (oldString440 instanceof Utf8) {
+                    charSequence440 = (decoder).readString(((Utf8) oldString440));
+                } else {
+                    charSequence440 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, charSequence440);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F440': "+ unionIndex440));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex441 = (decoder.readIndex());
+        if (unionIndex441 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, null);
+        } else {
+            if (unionIndex441 == 1) {
+                Utf8 charSequence441;
+                Object oldString441 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(441);
+                if (oldString441 instanceof Utf8) {
+                    charSequence441 = (decoder).readString(((Utf8) oldString441));
+                } else {
+                    charSequence441 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, charSequence441);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F441': "+ unionIndex441));
+            }
+        }
+        int unionIndex442 = (decoder.readIndex());
+        if (unionIndex442 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, null);
+        } else {
+            if (unionIndex442 == 1) {
+                Utf8 charSequence442;
+                Object oldString442 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(442);
+                if (oldString442 instanceof Utf8) {
+                    charSequence442 = (decoder).readString(((Utf8) oldString442));
+                } else {
+                    charSequence442 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, charSequence442);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F442': "+ unionIndex442));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex443 = (decoder.readIndex());
+        if (unionIndex443 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, null);
+        } else {
+            if (unionIndex443 == 1) {
+                Utf8 charSequence443;
+                Object oldString443 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(443);
+                if (oldString443 instanceof Utf8) {
+                    charSequence443 = (decoder).readString(((Utf8) oldString443));
+                } else {
+                    charSequence443 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, charSequence443);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F443': "+ unionIndex443));
+            }
+        }
+        int unionIndex444 = (decoder.readIndex());
+        if (unionIndex444 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, null);
+        } else {
+            if (unionIndex444 == 1) {
+                Utf8 charSequence444;
+                Object oldString444 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(444);
+                if (oldString444 instanceof Utf8) {
+                    charSequence444 = (decoder).readString(((Utf8) oldString444));
+                } else {
+                    charSequence444 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, charSequence444);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F444': "+ unionIndex444));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex445 = (decoder.readIndex());
+        if (unionIndex445 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, null);
+        } else {
+            if (unionIndex445 == 1) {
+                Utf8 charSequence445;
+                Object oldString445 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(445);
+                if (oldString445 instanceof Utf8) {
+                    charSequence445 = (decoder).readString(((Utf8) oldString445));
+                } else {
+                    charSequence445 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, charSequence445);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F445': "+ unionIndex445));
+            }
+        }
+        int unionIndex446 = (decoder.readIndex());
+        if (unionIndex446 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, null);
+        } else {
+            if (unionIndex446 == 1) {
+                Utf8 charSequence446;
+                Object oldString446 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(446);
+                if (oldString446 instanceof Utf8) {
+                    charSequence446 = (decoder).readString(((Utf8) oldString446));
+                } else {
+                    charSequence446 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, charSequence446);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F446': "+ unionIndex446));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex447 = (decoder.readIndex());
+        if (unionIndex447 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, null);
+        } else {
+            if (unionIndex447 == 1) {
+                Utf8 charSequence447;
+                Object oldString447 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(447);
+                if (oldString447 instanceof Utf8) {
+                    charSequence447 = (decoder).readString(((Utf8) oldString447));
+                } else {
+                    charSequence447 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, charSequence447);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F447': "+ unionIndex447));
+            }
+        }
+        int unionIndex448 = (decoder.readIndex());
+        if (unionIndex448 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, null);
+        } else {
+            if (unionIndex448 == 1) {
+                Utf8 charSequence448;
+                Object oldString448 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(448);
+                if (oldString448 instanceof Utf8) {
+                    charSequence448 = (decoder).readString(((Utf8) oldString448));
+                } else {
+                    charSequence448 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, charSequence448);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F448': "+ unionIndex448));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex449 = (decoder.readIndex());
+        if (unionIndex449 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, null);
+        } else {
+            if (unionIndex449 == 1) {
+                Utf8 charSequence449;
+                Object oldString449 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(449);
+                if (oldString449 instanceof Utf8) {
+                    charSequence449 = (decoder).readString(((Utf8) oldString449));
+                } else {
+                    charSequence449 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, charSequence449);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F449': "+ unionIndex449));
+            }
+        }
+        int unionIndex450 = (decoder.readIndex());
+        if (unionIndex450 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, null);
+        } else {
+            if (unionIndex450 == 1) {
+                Utf8 charSequence450;
+                Object oldString450 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(450);
+                if (oldString450 instanceof Utf8) {
+                    charSequence450 = (decoder).readString(((Utf8) oldString450));
+                } else {
+                    charSequence450 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, charSequence450);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F450': "+ unionIndex450));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex451 = (decoder.readIndex());
+        if (unionIndex451 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, null);
+        } else {
+            if (unionIndex451 == 1) {
+                Utf8 charSequence451;
+                Object oldString451 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(451);
+                if (oldString451 instanceof Utf8) {
+                    charSequence451 = (decoder).readString(((Utf8) oldString451));
+                } else {
+                    charSequence451 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, charSequence451);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F451': "+ unionIndex451));
+            }
+        }
+        int unionIndex452 = (decoder.readIndex());
+        if (unionIndex452 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, null);
+        } else {
+            if (unionIndex452 == 1) {
+                Utf8 charSequence452;
+                Object oldString452 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(452);
+                if (oldString452 instanceof Utf8) {
+                    charSequence452 = (decoder).readString(((Utf8) oldString452));
+                } else {
+                    charSequence452 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, charSequence452);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F452': "+ unionIndex452));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex453 = (decoder.readIndex());
+        if (unionIndex453 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, null);
+        } else {
+            if (unionIndex453 == 1) {
+                Utf8 charSequence453;
+                Object oldString453 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(453);
+                if (oldString453 instanceof Utf8) {
+                    charSequence453 = (decoder).readString(((Utf8) oldString453));
+                } else {
+                    charSequence453 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, charSequence453);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F453': "+ unionIndex453));
+            }
+        }
+        int unionIndex454 = (decoder.readIndex());
+        if (unionIndex454 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, null);
+        } else {
+            if (unionIndex454 == 1) {
+                Utf8 charSequence454;
+                Object oldString454 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(454);
+                if (oldString454 instanceof Utf8) {
+                    charSequence454 = (decoder).readString(((Utf8) oldString454));
+                } else {
+                    charSequence454 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, charSequence454);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F454': "+ unionIndex454));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex455 = (decoder.readIndex());
+        if (unionIndex455 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, null);
+        } else {
+            if (unionIndex455 == 1) {
+                Utf8 charSequence455;
+                Object oldString455 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(455);
+                if (oldString455 instanceof Utf8) {
+                    charSequence455 = (decoder).readString(((Utf8) oldString455));
+                } else {
+                    charSequence455 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, charSequence455);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F455': "+ unionIndex455));
+            }
+        }
+        int unionIndex456 = (decoder.readIndex());
+        if (unionIndex456 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, null);
+        } else {
+            if (unionIndex456 == 1) {
+                Utf8 charSequence456;
+                Object oldString456 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(456);
+                if (oldString456 instanceof Utf8) {
+                    charSequence456 = (decoder).readString(((Utf8) oldString456));
+                } else {
+                    charSequence456 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, charSequence456);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F456': "+ unionIndex456));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex457 = (decoder.readIndex());
+        if (unionIndex457 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, null);
+        } else {
+            if (unionIndex457 == 1) {
+                Utf8 charSequence457;
+                Object oldString457 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(457);
+                if (oldString457 instanceof Utf8) {
+                    charSequence457 = (decoder).readString(((Utf8) oldString457));
+                } else {
+                    charSequence457 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, charSequence457);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F457': "+ unionIndex457));
+            }
+        }
+        int unionIndex458 = (decoder.readIndex());
+        if (unionIndex458 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, null);
+        } else {
+            if (unionIndex458 == 1) {
+                Utf8 charSequence458;
+                Object oldString458 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(458);
+                if (oldString458 instanceof Utf8) {
+                    charSequence458 = (decoder).readString(((Utf8) oldString458));
+                } else {
+                    charSequence458 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, charSequence458);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F458': "+ unionIndex458));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex459 = (decoder.readIndex());
+        if (unionIndex459 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, null);
+        } else {
+            if (unionIndex459 == 1) {
+                Utf8 charSequence459;
+                Object oldString459 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(459);
+                if (oldString459 instanceof Utf8) {
+                    charSequence459 = (decoder).readString(((Utf8) oldString459));
+                } else {
+                    charSequence459 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, charSequence459);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F459': "+ unionIndex459));
+            }
+        }
+        int unionIndex460 = (decoder.readIndex());
+        if (unionIndex460 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, null);
+        } else {
+            if (unionIndex460 == 1) {
+                Utf8 charSequence460;
+                Object oldString460 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(460);
+                if (oldString460 instanceof Utf8) {
+                    charSequence460 = (decoder).readString(((Utf8) oldString460));
+                } else {
+                    charSequence460 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, charSequence460);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F460': "+ unionIndex460));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex461 = (decoder.readIndex());
+        if (unionIndex461 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, null);
+        } else {
+            if (unionIndex461 == 1) {
+                Utf8 charSequence461;
+                Object oldString461 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(461);
+                if (oldString461 instanceof Utf8) {
+                    charSequence461 = (decoder).readString(((Utf8) oldString461));
+                } else {
+                    charSequence461 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, charSequence461);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F461': "+ unionIndex461));
+            }
+        }
+        int unionIndex462 = (decoder.readIndex());
+        if (unionIndex462 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, null);
+        } else {
+            if (unionIndex462 == 1) {
+                Utf8 charSequence462;
+                Object oldString462 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(462);
+                if (oldString462 instanceof Utf8) {
+                    charSequence462 = (decoder).readString(((Utf8) oldString462));
+                } else {
+                    charSequence462 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, charSequence462);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F462': "+ unionIndex462));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex463 = (decoder.readIndex());
+        if (unionIndex463 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, null);
+        } else {
+            if (unionIndex463 == 1) {
+                Utf8 charSequence463;
+                Object oldString463 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(463);
+                if (oldString463 instanceof Utf8) {
+                    charSequence463 = (decoder).readString(((Utf8) oldString463));
+                } else {
+                    charSequence463 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, charSequence463);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F463': "+ unionIndex463));
+            }
+        }
+        int unionIndex464 = (decoder.readIndex());
+        if (unionIndex464 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, null);
+        } else {
+            if (unionIndex464 == 1) {
+                Utf8 charSequence464;
+                Object oldString464 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(464);
+                if (oldString464 instanceof Utf8) {
+                    charSequence464 = (decoder).readString(((Utf8) oldString464));
+                } else {
+                    charSequence464 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, charSequence464);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F464': "+ unionIndex464));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex465 = (decoder.readIndex());
+        if (unionIndex465 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, null);
+        } else {
+            if (unionIndex465 == 1) {
+                Utf8 charSequence465;
+                Object oldString465 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(465);
+                if (oldString465 instanceof Utf8) {
+                    charSequence465 = (decoder).readString(((Utf8) oldString465));
+                } else {
+                    charSequence465 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, charSequence465);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F465': "+ unionIndex465));
+            }
+        }
+        int unionIndex466 = (decoder.readIndex());
+        if (unionIndex466 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, null);
+        } else {
+            if (unionIndex466 == 1) {
+                Utf8 charSequence466;
+                Object oldString466 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(466);
+                if (oldString466 instanceof Utf8) {
+                    charSequence466 = (decoder).readString(((Utf8) oldString466));
+                } else {
+                    charSequence466 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, charSequence466);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F466': "+ unionIndex466));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex467 = (decoder.readIndex());
+        if (unionIndex467 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, null);
+        } else {
+            if (unionIndex467 == 1) {
+                Utf8 charSequence467;
+                Object oldString467 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(467);
+                if (oldString467 instanceof Utf8) {
+                    charSequence467 = (decoder).readString(((Utf8) oldString467));
+                } else {
+                    charSequence467 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, charSequence467);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F467': "+ unionIndex467));
+            }
+        }
+        int unionIndex468 = (decoder.readIndex());
+        if (unionIndex468 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, null);
+        } else {
+            if (unionIndex468 == 1) {
+                Utf8 charSequence468;
+                Object oldString468 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(468);
+                if (oldString468 instanceof Utf8) {
+                    charSequence468 = (decoder).readString(((Utf8) oldString468));
+                } else {
+                    charSequence468 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, charSequence468);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F468': "+ unionIndex468));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex469 = (decoder.readIndex());
+        if (unionIndex469 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, null);
+        } else {
+            if (unionIndex469 == 1) {
+                Utf8 charSequence469;
+                Object oldString469 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(469);
+                if (oldString469 instanceof Utf8) {
+                    charSequence469 = (decoder).readString(((Utf8) oldString469));
+                } else {
+                    charSequence469 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, charSequence469);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F469': "+ unionIndex469));
+            }
+        }
+        int unionIndex470 = (decoder.readIndex());
+        if (unionIndex470 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, null);
+        } else {
+            if (unionIndex470 == 1) {
+                Utf8 charSequence470;
+                Object oldString470 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(470);
+                if (oldString470 instanceof Utf8) {
+                    charSequence470 = (decoder).readString(((Utf8) oldString470));
+                } else {
+                    charSequence470 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, charSequence470);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F470': "+ unionIndex470));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex471 = (decoder.readIndex());
+        if (unionIndex471 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, null);
+        } else {
+            if (unionIndex471 == 1) {
+                Utf8 charSequence471;
+                Object oldString471 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(471);
+                if (oldString471 instanceof Utf8) {
+                    charSequence471 = (decoder).readString(((Utf8) oldString471));
+                } else {
+                    charSequence471 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, charSequence471);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F471': "+ unionIndex471));
+            }
+        }
+        int unionIndex472 = (decoder.readIndex());
+        if (unionIndex472 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, null);
+        } else {
+            if (unionIndex472 == 1) {
+                Utf8 charSequence472;
+                Object oldString472 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(472);
+                if (oldString472 instanceof Utf8) {
+                    charSequence472 = (decoder).readString(((Utf8) oldString472));
+                } else {
+                    charSequence472 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, charSequence472);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F472': "+ unionIndex472));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex473 = (decoder.readIndex());
+        if (unionIndex473 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, null);
+        } else {
+            if (unionIndex473 == 1) {
+                Utf8 charSequence473;
+                Object oldString473 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(473);
+                if (oldString473 instanceof Utf8) {
+                    charSequence473 = (decoder).readString(((Utf8) oldString473));
+                } else {
+                    charSequence473 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, charSequence473);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F473': "+ unionIndex473));
+            }
+        }
+        int unionIndex474 = (decoder.readIndex());
+        if (unionIndex474 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, null);
+        } else {
+            if (unionIndex474 == 1) {
+                Utf8 charSequence474;
+                Object oldString474 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(474);
+                if (oldString474 instanceof Utf8) {
+                    charSequence474 = (decoder).readString(((Utf8) oldString474));
+                } else {
+                    charSequence474 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, charSequence474);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F474': "+ unionIndex474));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex475 = (decoder.readIndex());
+        if (unionIndex475 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, null);
+        } else {
+            if (unionIndex475 == 1) {
+                Utf8 charSequence475;
+                Object oldString475 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(475);
+                if (oldString475 instanceof Utf8) {
+                    charSequence475 = (decoder).readString(((Utf8) oldString475));
+                } else {
+                    charSequence475 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, charSequence475);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F475': "+ unionIndex475));
+            }
+        }
+        int unionIndex476 = (decoder.readIndex());
+        if (unionIndex476 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, null);
+        } else {
+            if (unionIndex476 == 1) {
+                Utf8 charSequence476;
+                Object oldString476 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(476);
+                if (oldString476 instanceof Utf8) {
+                    charSequence476 = (decoder).readString(((Utf8) oldString476));
+                } else {
+                    charSequence476 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, charSequence476);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F476': "+ unionIndex476));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex477 = (decoder.readIndex());
+        if (unionIndex477 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, null);
+        } else {
+            if (unionIndex477 == 1) {
+                Utf8 charSequence477;
+                Object oldString477 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(477);
+                if (oldString477 instanceof Utf8) {
+                    charSequence477 = (decoder).readString(((Utf8) oldString477));
+                } else {
+                    charSequence477 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, charSequence477);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F477': "+ unionIndex477));
+            }
+        }
+        int unionIndex478 = (decoder.readIndex());
+        if (unionIndex478 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, null);
+        } else {
+            if (unionIndex478 == 1) {
+                Utf8 charSequence478;
+                Object oldString478 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(478);
+                if (oldString478 instanceof Utf8) {
+                    charSequence478 = (decoder).readString(((Utf8) oldString478));
+                } else {
+                    charSequence478 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, charSequence478);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F478': "+ unionIndex478));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex479 = (decoder.readIndex());
+        if (unionIndex479 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, null);
+        } else {
+            if (unionIndex479 == 1) {
+                Utf8 charSequence479;
+                Object oldString479 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(479);
+                if (oldString479 instanceof Utf8) {
+                    charSequence479 = (decoder).readString(((Utf8) oldString479));
+                } else {
+                    charSequence479 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, charSequence479);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F479': "+ unionIndex479));
+            }
+        }
+        int unionIndex480 = (decoder.readIndex());
+        if (unionIndex480 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, null);
+        } else {
+            if (unionIndex480 == 1) {
+                Utf8 charSequence480;
+                Object oldString480 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(480);
+                if (oldString480 instanceof Utf8) {
+                    charSequence480 = (decoder).readString(((Utf8) oldString480));
+                } else {
+                    charSequence480 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, charSequence480);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F480': "+ unionIndex480));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex481 = (decoder.readIndex());
+        if (unionIndex481 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, null);
+        } else {
+            if (unionIndex481 == 1) {
+                Utf8 charSequence481;
+                Object oldString481 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(481);
+                if (oldString481 instanceof Utf8) {
+                    charSequence481 = (decoder).readString(((Utf8) oldString481));
+                } else {
+                    charSequence481 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, charSequence481);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F481': "+ unionIndex481));
+            }
+        }
+        int unionIndex482 = (decoder.readIndex());
+        if (unionIndex482 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, null);
+        } else {
+            if (unionIndex482 == 1) {
+                Utf8 charSequence482;
+                Object oldString482 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(482);
+                if (oldString482 instanceof Utf8) {
+                    charSequence482 = (decoder).readString(((Utf8) oldString482));
+                } else {
+                    charSequence482 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, charSequence482);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F482': "+ unionIndex482));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex483 = (decoder.readIndex());
+        if (unionIndex483 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, null);
+        } else {
+            if (unionIndex483 == 1) {
+                Utf8 charSequence483;
+                Object oldString483 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(483);
+                if (oldString483 instanceof Utf8) {
+                    charSequence483 = (decoder).readString(((Utf8) oldString483));
+                } else {
+                    charSequence483 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, charSequence483);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F483': "+ unionIndex483));
+            }
+        }
+        int unionIndex484 = (decoder.readIndex());
+        if (unionIndex484 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, null);
+        } else {
+            if (unionIndex484 == 1) {
+                Utf8 charSequence484;
+                Object oldString484 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(484);
+                if (oldString484 instanceof Utf8) {
+                    charSequence484 = (decoder).readString(((Utf8) oldString484));
+                } else {
+                    charSequence484 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, charSequence484);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F484': "+ unionIndex484));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex485 = (decoder.readIndex());
+        if (unionIndex485 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, null);
+        } else {
+            if (unionIndex485 == 1) {
+                Utf8 charSequence485;
+                Object oldString485 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(485);
+                if (oldString485 instanceof Utf8) {
+                    charSequence485 = (decoder).readString(((Utf8) oldString485));
+                } else {
+                    charSequence485 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, charSequence485);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F485': "+ unionIndex485));
+            }
+        }
+        int unionIndex486 = (decoder.readIndex());
+        if (unionIndex486 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, null);
+        } else {
+            if (unionIndex486 == 1) {
+                Utf8 charSequence486;
+                Object oldString486 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(486);
+                if (oldString486 instanceof Utf8) {
+                    charSequence486 = (decoder).readString(((Utf8) oldString486));
+                } else {
+                    charSequence486 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, charSequence486);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F486': "+ unionIndex486));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex487 = (decoder.readIndex());
+        if (unionIndex487 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, null);
+        } else {
+            if (unionIndex487 == 1) {
+                Utf8 charSequence487;
+                Object oldString487 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(487);
+                if (oldString487 instanceof Utf8) {
+                    charSequence487 = (decoder).readString(((Utf8) oldString487));
+                } else {
+                    charSequence487 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, charSequence487);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F487': "+ unionIndex487));
+            }
+        }
+        int unionIndex488 = (decoder.readIndex());
+        if (unionIndex488 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, null);
+        } else {
+            if (unionIndex488 == 1) {
+                Utf8 charSequence488;
+                Object oldString488 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(488);
+                if (oldString488 instanceof Utf8) {
+                    charSequence488 = (decoder).readString(((Utf8) oldString488));
+                } else {
+                    charSequence488 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, charSequence488);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F488': "+ unionIndex488));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex489 = (decoder.readIndex());
+        if (unionIndex489 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, null);
+        } else {
+            if (unionIndex489 == 1) {
+                Utf8 charSequence489;
+                Object oldString489 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(489);
+                if (oldString489 instanceof Utf8) {
+                    charSequence489 = (decoder).readString(((Utf8) oldString489));
+                } else {
+                    charSequence489 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, charSequence489);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F489': "+ unionIndex489));
+            }
+        }
+        int unionIndex490 = (decoder.readIndex());
+        if (unionIndex490 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, null);
+        } else {
+            if (unionIndex490 == 1) {
+                Utf8 charSequence490;
+                Object oldString490 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(490);
+                if (oldString490 instanceof Utf8) {
+                    charSequence490 = (decoder).readString(((Utf8) oldString490));
+                } else {
+                    charSequence490 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, charSequence490);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F490': "+ unionIndex490));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex491 = (decoder.readIndex());
+        if (unionIndex491 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, null);
+        } else {
+            if (unionIndex491 == 1) {
+                Utf8 charSequence491;
+                Object oldString491 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(491);
+                if (oldString491 instanceof Utf8) {
+                    charSequence491 = (decoder).readString(((Utf8) oldString491));
+                } else {
+                    charSequence491 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, charSequence491);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F491': "+ unionIndex491));
+            }
+        }
+        int unionIndex492 = (decoder.readIndex());
+        if (unionIndex492 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, null);
+        } else {
+            if (unionIndex492 == 1) {
+                Utf8 charSequence492;
+                Object oldString492 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(492);
+                if (oldString492 instanceof Utf8) {
+                    charSequence492 = (decoder).readString(((Utf8) oldString492));
+                } else {
+                    charSequence492 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, charSequence492);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F492': "+ unionIndex492));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex493 = (decoder.readIndex());
+        if (unionIndex493 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, null);
+        } else {
+            if (unionIndex493 == 1) {
+                Utf8 charSequence493;
+                Object oldString493 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(493);
+                if (oldString493 instanceof Utf8) {
+                    charSequence493 = (decoder).readString(((Utf8) oldString493));
+                } else {
+                    charSequence493 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, charSequence493);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F493': "+ unionIndex493));
+            }
+        }
+        int unionIndex494 = (decoder.readIndex());
+        if (unionIndex494 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, null);
+        } else {
+            if (unionIndex494 == 1) {
+                Utf8 charSequence494;
+                Object oldString494 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(494);
+                if (oldString494 instanceof Utf8) {
+                    charSequence494 = (decoder).readString(((Utf8) oldString494));
+                } else {
+                    charSequence494 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, charSequence494);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F494': "+ unionIndex494));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex495 = (decoder.readIndex());
+        if (unionIndex495 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, null);
+        } else {
+            if (unionIndex495 == 1) {
+                Utf8 charSequence495;
+                Object oldString495 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(495);
+                if (oldString495 instanceof Utf8) {
+                    charSequence495 = (decoder).readString(((Utf8) oldString495));
+                } else {
+                    charSequence495 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, charSequence495);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F495': "+ unionIndex495));
+            }
+        }
+        int unionIndex496 = (decoder.readIndex());
+        if (unionIndex496 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, null);
+        } else {
+            if (unionIndex496 == 1) {
+                Utf8 charSequence496;
+                Object oldString496 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(496);
+                if (oldString496 instanceof Utf8) {
+                    charSequence496 = (decoder).readString(((Utf8) oldString496));
+                } else {
+                    charSequence496 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, charSequence496);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F496': "+ unionIndex496));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex497 = (decoder.readIndex());
+        if (unionIndex497 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, null);
+        } else {
+            if (unionIndex497 == 1) {
+                Utf8 charSequence497;
+                Object oldString497 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(497);
+                if (oldString497 instanceof Utf8) {
+                    charSequence497 = (decoder).readString(((Utf8) oldString497));
+                } else {
+                    charSequence497 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, charSequence497);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F497': "+ unionIndex497));
+            }
+        }
+        int unionIndex498 = (decoder.readIndex());
+        if (unionIndex498 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, null);
+        } else {
+            if (unionIndex498 == 1) {
+                Utf8 charSequence498;
+                Object oldString498 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(498);
+                if (oldString498 instanceof Utf8) {
+                    charSequence498 = (decoder).readString(((Utf8) oldString498));
+                } else {
+                    charSequence498 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, charSequence498);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F498': "+ unionIndex498));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex499 = (decoder.readIndex());
+        if (unionIndex499 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, null);
+        } else {
+            if (unionIndex499 == 1) {
+                Utf8 charSequence499;
+                Object oldString499 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(499);
+                if (oldString499 instanceof Utf8) {
+                    charSequence499 = (decoder).readString(((Utf8) oldString499));
+                } else {
+                    charSequence499 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, charSequence499);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F499': "+ unionIndex499));
+            }
+        }
+        int unionIndex500 = (decoder.readIndex());
+        if (unionIndex500 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, null);
+        } else {
+            if (unionIndex500 == 1) {
+                Utf8 charSequence500;
+                Object oldString500 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(500);
+                if (oldString500 instanceof Utf8) {
+                    charSequence500 = (decoder).readString(((Utf8) oldString500));
+                } else {
+                    charSequence500 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, charSequence500);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F500': "+ unionIndex500));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex501 = (decoder.readIndex());
+        if (unionIndex501 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, null);
+        } else {
+            if (unionIndex501 == 1) {
+                Utf8 charSequence501;
+                Object oldString501 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(501);
+                if (oldString501 instanceof Utf8) {
+                    charSequence501 = (decoder).readString(((Utf8) oldString501));
+                } else {
+                    charSequence501 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, charSequence501);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F501': "+ unionIndex501));
+            }
+        }
+        int unionIndex502 = (decoder.readIndex());
+        if (unionIndex502 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, null);
+        } else {
+            if (unionIndex502 == 1) {
+                Utf8 charSequence502;
+                Object oldString502 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(502);
+                if (oldString502 instanceof Utf8) {
+                    charSequence502 = (decoder).readString(((Utf8) oldString502));
+                } else {
+                    charSequence502 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, charSequence502);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F502': "+ unionIndex502));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex503 = (decoder.readIndex());
+        if (unionIndex503 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, null);
+        } else {
+            if (unionIndex503 == 1) {
+                Utf8 charSequence503;
+                Object oldString503 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(503);
+                if (oldString503 instanceof Utf8) {
+                    charSequence503 = (decoder).readString(((Utf8) oldString503));
+                } else {
+                    charSequence503 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, charSequence503);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F503': "+ unionIndex503));
+            }
+        }
+        int unionIndex504 = (decoder.readIndex());
+        if (unionIndex504 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, null);
+        } else {
+            if (unionIndex504 == 1) {
+                Utf8 charSequence504;
+                Object oldString504 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(504);
+                if (oldString504 instanceof Utf8) {
+                    charSequence504 = (decoder).readString(((Utf8) oldString504));
+                } else {
+                    charSequence504 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, charSequence504);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F504': "+ unionIndex504));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex505 = (decoder.readIndex());
+        if (unionIndex505 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, null);
+        } else {
+            if (unionIndex505 == 1) {
+                Utf8 charSequence505;
+                Object oldString505 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(505);
+                if (oldString505 instanceof Utf8) {
+                    charSequence505 = (decoder).readString(((Utf8) oldString505));
+                } else {
+                    charSequence505 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, charSequence505);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F505': "+ unionIndex505));
+            }
+        }
+        int unionIndex506 = (decoder.readIndex());
+        if (unionIndex506 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, null);
+        } else {
+            if (unionIndex506 == 1) {
+                Utf8 charSequence506;
+                Object oldString506 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(506);
+                if (oldString506 instanceof Utf8) {
+                    charSequence506 = (decoder).readString(((Utf8) oldString506));
+                } else {
+                    charSequence506 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, charSequence506);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F506': "+ unionIndex506));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex507 = (decoder.readIndex());
+        if (unionIndex507 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, null);
+        } else {
+            if (unionIndex507 == 1) {
+                Utf8 charSequence507;
+                Object oldString507 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(507);
+                if (oldString507 instanceof Utf8) {
+                    charSequence507 = (decoder).readString(((Utf8) oldString507));
+                } else {
+                    charSequence507 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, charSequence507);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F507': "+ unionIndex507));
+            }
+        }
+        int unionIndex508 = (decoder.readIndex());
+        if (unionIndex508 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, null);
+        } else {
+            if (unionIndex508 == 1) {
+                Utf8 charSequence508;
+                Object oldString508 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(508);
+                if (oldString508 instanceof Utf8) {
+                    charSequence508 = (decoder).readString(((Utf8) oldString508));
+                } else {
+                    charSequence508 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, charSequence508);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F508': "+ unionIndex508));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex509 = (decoder.readIndex());
+        if (unionIndex509 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, null);
+        } else {
+            if (unionIndex509 == 1) {
+                Utf8 charSequence509;
+                Object oldString509 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(509);
+                if (oldString509 instanceof Utf8) {
+                    charSequence509 = (decoder).readString(((Utf8) oldString509));
+                } else {
+                    charSequence509 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, charSequence509);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F509': "+ unionIndex509));
+            }
+        }
+        int unionIndex510 = (decoder.readIndex());
+        if (unionIndex510 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, null);
+        } else {
+            if (unionIndex510 == 1) {
+                Utf8 charSequence510;
+                Object oldString510 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(510);
+                if (oldString510 instanceof Utf8) {
+                    charSequence510 = (decoder).readString(((Utf8) oldString510));
+                } else {
+                    charSequence510 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, charSequence510);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F510': "+ unionIndex510));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex511 = (decoder.readIndex());
+        if (unionIndex511 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, null);
+        } else {
+            if (unionIndex511 == 1) {
+                Utf8 charSequence511;
+                Object oldString511 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(511);
+                if (oldString511 instanceof Utf8) {
+                    charSequence511 = (decoder).readString(((Utf8) oldString511));
+                } else {
+                    charSequence511 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, charSequence511);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F511': "+ unionIndex511));
+            }
+        }
+        int unionIndex512 = (decoder.readIndex());
+        if (unionIndex512 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, null);
+        } else {
+            if (unionIndex512 == 1) {
+                Utf8 charSequence512;
+                Object oldString512 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(512);
+                if (oldString512 instanceof Utf8) {
+                    charSequence512 = (decoder).readString(((Utf8) oldString512));
+                } else {
+                    charSequence512 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, charSequence512);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F512': "+ unionIndex512));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex513 = (decoder.readIndex());
+        if (unionIndex513 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, null);
+        } else {
+            if (unionIndex513 == 1) {
+                Utf8 charSequence513;
+                Object oldString513 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(513);
+                if (oldString513 instanceof Utf8) {
+                    charSequence513 = (decoder).readString(((Utf8) oldString513));
+                } else {
+                    charSequence513 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, charSequence513);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F513': "+ unionIndex513));
+            }
+        }
+        int unionIndex514 = (decoder.readIndex());
+        if (unionIndex514 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, null);
+        } else {
+            if (unionIndex514 == 1) {
+                Utf8 charSequence514;
+                Object oldString514 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(514);
+                if (oldString514 instanceof Utf8) {
+                    charSequence514 = (decoder).readString(((Utf8) oldString514));
+                } else {
+                    charSequence514 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, charSequence514);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F514': "+ unionIndex514));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex515 = (decoder.readIndex());
+        if (unionIndex515 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, null);
+        } else {
+            if (unionIndex515 == 1) {
+                Utf8 charSequence515;
+                Object oldString515 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(515);
+                if (oldString515 instanceof Utf8) {
+                    charSequence515 = (decoder).readString(((Utf8) oldString515));
+                } else {
+                    charSequence515 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, charSequence515);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F515': "+ unionIndex515));
+            }
+        }
+        int unionIndex516 = (decoder.readIndex());
+        if (unionIndex516 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, null);
+        } else {
+            if (unionIndex516 == 1) {
+                Utf8 charSequence516;
+                Object oldString516 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(516);
+                if (oldString516 instanceof Utf8) {
+                    charSequence516 = (decoder).readString(((Utf8) oldString516));
+                } else {
+                    charSequence516 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, charSequence516);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F516': "+ unionIndex516));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex517 = (decoder.readIndex());
+        if (unionIndex517 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, null);
+        } else {
+            if (unionIndex517 == 1) {
+                Utf8 charSequence517;
+                Object oldString517 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(517);
+                if (oldString517 instanceof Utf8) {
+                    charSequence517 = (decoder).readString(((Utf8) oldString517));
+                } else {
+                    charSequence517 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, charSequence517);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F517': "+ unionIndex517));
+            }
+        }
+        int unionIndex518 = (decoder.readIndex());
+        if (unionIndex518 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, null);
+        } else {
+            if (unionIndex518 == 1) {
+                Utf8 charSequence518;
+                Object oldString518 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(518);
+                if (oldString518 instanceof Utf8) {
+                    charSequence518 = (decoder).readString(((Utf8) oldString518));
+                } else {
+                    charSequence518 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, charSequence518);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F518': "+ unionIndex518));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex519 = (decoder.readIndex());
+        if (unionIndex519 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, null);
+        } else {
+            if (unionIndex519 == 1) {
+                Utf8 charSequence519;
+                Object oldString519 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(519);
+                if (oldString519 instanceof Utf8) {
+                    charSequence519 = (decoder).readString(((Utf8) oldString519));
+                } else {
+                    charSequence519 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, charSequence519);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F519': "+ unionIndex519));
+            }
+        }
+        int unionIndex520 = (decoder.readIndex());
+        if (unionIndex520 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, null);
+        } else {
+            if (unionIndex520 == 1) {
+                Utf8 charSequence520;
+                Object oldString520 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(520);
+                if (oldString520 instanceof Utf8) {
+                    charSequence520 = (decoder).readString(((Utf8) oldString520));
+                } else {
+                    charSequence520 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, charSequence520);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F520': "+ unionIndex520));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex521 = (decoder.readIndex());
+        if (unionIndex521 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, null);
+        } else {
+            if (unionIndex521 == 1) {
+                Utf8 charSequence521;
+                Object oldString521 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(521);
+                if (oldString521 instanceof Utf8) {
+                    charSequence521 = (decoder).readString(((Utf8) oldString521));
+                } else {
+                    charSequence521 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, charSequence521);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F521': "+ unionIndex521));
+            }
+        }
+        int unionIndex522 = (decoder.readIndex());
+        if (unionIndex522 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, null);
+        } else {
+            if (unionIndex522 == 1) {
+                Utf8 charSequence522;
+                Object oldString522 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(522);
+                if (oldString522 instanceof Utf8) {
+                    charSequence522 = (decoder).readString(((Utf8) oldString522));
+                } else {
+                    charSequence522 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, charSequence522);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F522': "+ unionIndex522));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex523 = (decoder.readIndex());
+        if (unionIndex523 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, null);
+        } else {
+            if (unionIndex523 == 1) {
+                Utf8 charSequence523;
+                Object oldString523 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(523);
+                if (oldString523 instanceof Utf8) {
+                    charSequence523 = (decoder).readString(((Utf8) oldString523));
+                } else {
+                    charSequence523 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, charSequence523);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F523': "+ unionIndex523));
+            }
+        }
+        int unionIndex524 = (decoder.readIndex());
+        if (unionIndex524 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, null);
+        } else {
+            if (unionIndex524 == 1) {
+                Utf8 charSequence524;
+                Object oldString524 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(524);
+                if (oldString524 instanceof Utf8) {
+                    charSequence524 = (decoder).readString(((Utf8) oldString524));
+                } else {
+                    charSequence524 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, charSequence524);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F524': "+ unionIndex524));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex525 = (decoder.readIndex());
+        if (unionIndex525 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, null);
+        } else {
+            if (unionIndex525 == 1) {
+                Utf8 charSequence525;
+                Object oldString525 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(525);
+                if (oldString525 instanceof Utf8) {
+                    charSequence525 = (decoder).readString(((Utf8) oldString525));
+                } else {
+                    charSequence525 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, charSequence525);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F525': "+ unionIndex525));
+            }
+        }
+        int unionIndex526 = (decoder.readIndex());
+        if (unionIndex526 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, null);
+        } else {
+            if (unionIndex526 == 1) {
+                Utf8 charSequence526;
+                Object oldString526 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(526);
+                if (oldString526 instanceof Utf8) {
+                    charSequence526 = (decoder).readString(((Utf8) oldString526));
+                } else {
+                    charSequence526 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, charSequence526);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F526': "+ unionIndex526));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex527 = (decoder.readIndex());
+        if (unionIndex527 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, null);
+        } else {
+            if (unionIndex527 == 1) {
+                Utf8 charSequence527;
+                Object oldString527 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(527);
+                if (oldString527 instanceof Utf8) {
+                    charSequence527 = (decoder).readString(((Utf8) oldString527));
+                } else {
+                    charSequence527 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, charSequence527);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F527': "+ unionIndex527));
+            }
+        }
+        int unionIndex528 = (decoder.readIndex());
+        if (unionIndex528 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, null);
+        } else {
+            if (unionIndex528 == 1) {
+                Utf8 charSequence528;
+                Object oldString528 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(528);
+                if (oldString528 instanceof Utf8) {
+                    charSequence528 = (decoder).readString(((Utf8) oldString528));
+                } else {
+                    charSequence528 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, charSequence528);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F528': "+ unionIndex528));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex529 = (decoder.readIndex());
+        if (unionIndex529 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, null);
+        } else {
+            if (unionIndex529 == 1) {
+                Utf8 charSequence529;
+                Object oldString529 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(529);
+                if (oldString529 instanceof Utf8) {
+                    charSequence529 = (decoder).readString(((Utf8) oldString529));
+                } else {
+                    charSequence529 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, charSequence529);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F529': "+ unionIndex529));
+            }
+        }
+        int unionIndex530 = (decoder.readIndex());
+        if (unionIndex530 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, null);
+        } else {
+            if (unionIndex530 == 1) {
+                Utf8 charSequence530;
+                Object oldString530 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(530);
+                if (oldString530 instanceof Utf8) {
+                    charSequence530 = (decoder).readString(((Utf8) oldString530));
+                } else {
+                    charSequence530 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, charSequence530);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F530': "+ unionIndex530));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex531 = (decoder.readIndex());
+        if (unionIndex531 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, null);
+        } else {
+            if (unionIndex531 == 1) {
+                Utf8 charSequence531;
+                Object oldString531 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(531);
+                if (oldString531 instanceof Utf8) {
+                    charSequence531 = (decoder).readString(((Utf8) oldString531));
+                } else {
+                    charSequence531 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, charSequence531);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F531': "+ unionIndex531));
+            }
+        }
+        int unionIndex532 = (decoder.readIndex());
+        if (unionIndex532 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, null);
+        } else {
+            if (unionIndex532 == 1) {
+                Utf8 charSequence532;
+                Object oldString532 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(532);
+                if (oldString532 instanceof Utf8) {
+                    charSequence532 = (decoder).readString(((Utf8) oldString532));
+                } else {
+                    charSequence532 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, charSequence532);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F532': "+ unionIndex532));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex533 = (decoder.readIndex());
+        if (unionIndex533 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, null);
+        } else {
+            if (unionIndex533 == 1) {
+                Utf8 charSequence533;
+                Object oldString533 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(533);
+                if (oldString533 instanceof Utf8) {
+                    charSequence533 = (decoder).readString(((Utf8) oldString533));
+                } else {
+                    charSequence533 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, charSequence533);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F533': "+ unionIndex533));
+            }
+        }
+        int unionIndex534 = (decoder.readIndex());
+        if (unionIndex534 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, null);
+        } else {
+            if (unionIndex534 == 1) {
+                Utf8 charSequence534;
+                Object oldString534 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(534);
+                if (oldString534 instanceof Utf8) {
+                    charSequence534 = (decoder).readString(((Utf8) oldString534));
+                } else {
+                    charSequence534 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, charSequence534);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F534': "+ unionIndex534));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex535 = (decoder.readIndex());
+        if (unionIndex535 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, null);
+        } else {
+            if (unionIndex535 == 1) {
+                Utf8 charSequence535;
+                Object oldString535 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(535);
+                if (oldString535 instanceof Utf8) {
+                    charSequence535 = (decoder).readString(((Utf8) oldString535));
+                } else {
+                    charSequence535 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, charSequence535);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F535': "+ unionIndex535));
+            }
+        }
+        int unionIndex536 = (decoder.readIndex());
+        if (unionIndex536 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, null);
+        } else {
+            if (unionIndex536 == 1) {
+                Utf8 charSequence536;
+                Object oldString536 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(536);
+                if (oldString536 instanceof Utf8) {
+                    charSequence536 = (decoder).readString(((Utf8) oldString536));
+                } else {
+                    charSequence536 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, charSequence536);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F536': "+ unionIndex536));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex537 = (decoder.readIndex());
+        if (unionIndex537 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, null);
+        } else {
+            if (unionIndex537 == 1) {
+                Utf8 charSequence537;
+                Object oldString537 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(537);
+                if (oldString537 instanceof Utf8) {
+                    charSequence537 = (decoder).readString(((Utf8) oldString537));
+                } else {
+                    charSequence537 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, charSequence537);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F537': "+ unionIndex537));
+            }
+        }
+        int unionIndex538 = (decoder.readIndex());
+        if (unionIndex538 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, null);
+        } else {
+            if (unionIndex538 == 1) {
+                Utf8 charSequence538;
+                Object oldString538 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(538);
+                if (oldString538 instanceof Utf8) {
+                    charSequence538 = (decoder).readString(((Utf8) oldString538));
+                } else {
+                    charSequence538 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, charSequence538);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F538': "+ unionIndex538));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex539 = (decoder.readIndex());
+        if (unionIndex539 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, null);
+        } else {
+            if (unionIndex539 == 1) {
+                Utf8 charSequence539;
+                Object oldString539 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(539);
+                if (oldString539 instanceof Utf8) {
+                    charSequence539 = (decoder).readString(((Utf8) oldString539));
+                } else {
+                    charSequence539 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, charSequence539);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F539': "+ unionIndex539));
+            }
+        }
+        int unionIndex540 = (decoder.readIndex());
+        if (unionIndex540 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, null);
+        } else {
+            if (unionIndex540 == 1) {
+                Utf8 charSequence540;
+                Object oldString540 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(540);
+                if (oldString540 instanceof Utf8) {
+                    charSequence540 = (decoder).readString(((Utf8) oldString540));
+                } else {
+                    charSequence540 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, charSequence540);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F540': "+ unionIndex540));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex541 = (decoder.readIndex());
+        if (unionIndex541 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, null);
+        } else {
+            if (unionIndex541 == 1) {
+                Utf8 charSequence541;
+                Object oldString541 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(541);
+                if (oldString541 instanceof Utf8) {
+                    charSequence541 = (decoder).readString(((Utf8) oldString541));
+                } else {
+                    charSequence541 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, charSequence541);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F541': "+ unionIndex541));
+            }
+        }
+        int unionIndex542 = (decoder.readIndex());
+        if (unionIndex542 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, null);
+        } else {
+            if (unionIndex542 == 1) {
+                Utf8 charSequence542;
+                Object oldString542 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(542);
+                if (oldString542 instanceof Utf8) {
+                    charSequence542 = (decoder).readString(((Utf8) oldString542));
+                } else {
+                    charSequence542 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, charSequence542);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F542': "+ unionIndex542));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex543 = (decoder.readIndex());
+        if (unionIndex543 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, null);
+        } else {
+            if (unionIndex543 == 1) {
+                Utf8 charSequence543;
+                Object oldString543 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(543);
+                if (oldString543 instanceof Utf8) {
+                    charSequence543 = (decoder).readString(((Utf8) oldString543));
+                } else {
+                    charSequence543 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, charSequence543);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F543': "+ unionIndex543));
+            }
+        }
+        int unionIndex544 = (decoder.readIndex());
+        if (unionIndex544 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, null);
+        } else {
+            if (unionIndex544 == 1) {
+                Utf8 charSequence544;
+                Object oldString544 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(544);
+                if (oldString544 instanceof Utf8) {
+                    charSequence544 = (decoder).readString(((Utf8) oldString544));
+                } else {
+                    charSequence544 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, charSequence544);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F544': "+ unionIndex544));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex545 = (decoder.readIndex());
+        if (unionIndex545 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, null);
+        } else {
+            if (unionIndex545 == 1) {
+                Utf8 charSequence545;
+                Object oldString545 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(545);
+                if (oldString545 instanceof Utf8) {
+                    charSequence545 = (decoder).readString(((Utf8) oldString545));
+                } else {
+                    charSequence545 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, charSequence545);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F545': "+ unionIndex545));
+            }
+        }
+        int unionIndex546 = (decoder.readIndex());
+        if (unionIndex546 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, null);
+        } else {
+            if (unionIndex546 == 1) {
+                Utf8 charSequence546;
+                Object oldString546 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(546);
+                if (oldString546 instanceof Utf8) {
+                    charSequence546 = (decoder).readString(((Utf8) oldString546));
+                } else {
+                    charSequence546 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, charSequence546);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F546': "+ unionIndex546));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex547 = (decoder.readIndex());
+        if (unionIndex547 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, null);
+        } else {
+            if (unionIndex547 == 1) {
+                Utf8 charSequence547;
+                Object oldString547 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(547);
+                if (oldString547 instanceof Utf8) {
+                    charSequence547 = (decoder).readString(((Utf8) oldString547));
+                } else {
+                    charSequence547 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, charSequence547);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F547': "+ unionIndex547));
+            }
+        }
+        int unionIndex548 = (decoder.readIndex());
+        if (unionIndex548 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, null);
+        } else {
+            if (unionIndex548 == 1) {
+                Utf8 charSequence548;
+                Object oldString548 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(548);
+                if (oldString548 instanceof Utf8) {
+                    charSequence548 = (decoder).readString(((Utf8) oldString548));
+                } else {
+                    charSequence548 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, charSequence548);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F548': "+ unionIndex548));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex549 = (decoder.readIndex());
+        if (unionIndex549 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, null);
+        } else {
+            if (unionIndex549 == 1) {
+                Utf8 charSequence549;
+                Object oldString549 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(549);
+                if (oldString549 instanceof Utf8) {
+                    charSequence549 = (decoder).readString(((Utf8) oldString549));
+                } else {
+                    charSequence549 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, charSequence549);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F549': "+ unionIndex549));
+            }
+        }
+        int unionIndex550 = (decoder.readIndex());
+        if (unionIndex550 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, null);
+        } else {
+            if (unionIndex550 == 1) {
+                Utf8 charSequence550;
+                Object oldString550 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(550);
+                if (oldString550 instanceof Utf8) {
+                    charSequence550 = (decoder).readString(((Utf8) oldString550));
+                } else {
+                    charSequence550 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, charSequence550);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F550': "+ unionIndex550));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex551 = (decoder.readIndex());
+        if (unionIndex551 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, null);
+        } else {
+            if (unionIndex551 == 1) {
+                Utf8 charSequence551;
+                Object oldString551 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(551);
+                if (oldString551 instanceof Utf8) {
+                    charSequence551 = (decoder).readString(((Utf8) oldString551));
+                } else {
+                    charSequence551 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, charSequence551);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F551': "+ unionIndex551));
+            }
+        }
+        int unionIndex552 = (decoder.readIndex());
+        if (unionIndex552 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, null);
+        } else {
+            if (unionIndex552 == 1) {
+                Utf8 charSequence552;
+                Object oldString552 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(552);
+                if (oldString552 instanceof Utf8) {
+                    charSequence552 = (decoder).readString(((Utf8) oldString552));
+                } else {
+                    charSequence552 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, charSequence552);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F552': "+ unionIndex552));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex553 = (decoder.readIndex());
+        if (unionIndex553 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, null);
+        } else {
+            if (unionIndex553 == 1) {
+                Utf8 charSequence553;
+                Object oldString553 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(553);
+                if (oldString553 instanceof Utf8) {
+                    charSequence553 = (decoder).readString(((Utf8) oldString553));
+                } else {
+                    charSequence553 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, charSequence553);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F553': "+ unionIndex553));
+            }
+        }
+        int unionIndex554 = (decoder.readIndex());
+        if (unionIndex554 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, null);
+        } else {
+            if (unionIndex554 == 1) {
+                Utf8 charSequence554;
+                Object oldString554 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(554);
+                if (oldString554 instanceof Utf8) {
+                    charSequence554 = (decoder).readString(((Utf8) oldString554));
+                } else {
+                    charSequence554 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, charSequence554);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F554': "+ unionIndex554));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex555 = (decoder.readIndex());
+        if (unionIndex555 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, null);
+        } else {
+            if (unionIndex555 == 1) {
+                Utf8 charSequence555;
+                Object oldString555 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(555);
+                if (oldString555 instanceof Utf8) {
+                    charSequence555 = (decoder).readString(((Utf8) oldString555));
+                } else {
+                    charSequence555 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, charSequence555);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F555': "+ unionIndex555));
+            }
+        }
+        int unionIndex556 = (decoder.readIndex());
+        if (unionIndex556 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, null);
+        } else {
+            if (unionIndex556 == 1) {
+                Utf8 charSequence556;
+                Object oldString556 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(556);
+                if (oldString556 instanceof Utf8) {
+                    charSequence556 = (decoder).readString(((Utf8) oldString556));
+                } else {
+                    charSequence556 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, charSequence556);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F556': "+ unionIndex556));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex557 = (decoder.readIndex());
+        if (unionIndex557 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, null);
+        } else {
+            if (unionIndex557 == 1) {
+                Utf8 charSequence557;
+                Object oldString557 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(557);
+                if (oldString557 instanceof Utf8) {
+                    charSequence557 = (decoder).readString(((Utf8) oldString557));
+                } else {
+                    charSequence557 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, charSequence557);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F557': "+ unionIndex557));
+            }
+        }
+        int unionIndex558 = (decoder.readIndex());
+        if (unionIndex558 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, null);
+        } else {
+            if (unionIndex558 == 1) {
+                Utf8 charSequence558;
+                Object oldString558 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(558);
+                if (oldString558 instanceof Utf8) {
+                    charSequence558 = (decoder).readString(((Utf8) oldString558));
+                } else {
+                    charSequence558 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, charSequence558);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F558': "+ unionIndex558));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex559 = (decoder.readIndex());
+        if (unionIndex559 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, null);
+        } else {
+            if (unionIndex559 == 1) {
+                Utf8 charSequence559;
+                Object oldString559 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(559);
+                if (oldString559 instanceof Utf8) {
+                    charSequence559 = (decoder).readString(((Utf8) oldString559));
+                } else {
+                    charSequence559 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, charSequence559);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F559': "+ unionIndex559));
+            }
+        }
+        int unionIndex560 = (decoder.readIndex());
+        if (unionIndex560 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, null);
+        } else {
+            if (unionIndex560 == 1) {
+                Utf8 charSequence560;
+                Object oldString560 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(560);
+                if (oldString560 instanceof Utf8) {
+                    charSequence560 = (decoder).readString(((Utf8) oldString560));
+                } else {
+                    charSequence560 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, charSequence560);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F560': "+ unionIndex560));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex561 = (decoder.readIndex());
+        if (unionIndex561 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, null);
+        } else {
+            if (unionIndex561 == 1) {
+                Utf8 charSequence561;
+                Object oldString561 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(561);
+                if (oldString561 instanceof Utf8) {
+                    charSequence561 = (decoder).readString(((Utf8) oldString561));
+                } else {
+                    charSequence561 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, charSequence561);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F561': "+ unionIndex561));
+            }
+        }
+        int unionIndex562 = (decoder.readIndex());
+        if (unionIndex562 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, null);
+        } else {
+            if (unionIndex562 == 1) {
+                Utf8 charSequence562;
+                Object oldString562 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(562);
+                if (oldString562 instanceof Utf8) {
+                    charSequence562 = (decoder).readString(((Utf8) oldString562));
+                } else {
+                    charSequence562 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, charSequence562);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F562': "+ unionIndex562));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex563 = (decoder.readIndex());
+        if (unionIndex563 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, null);
+        } else {
+            if (unionIndex563 == 1) {
+                Utf8 charSequence563;
+                Object oldString563 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(563);
+                if (oldString563 instanceof Utf8) {
+                    charSequence563 = (decoder).readString(((Utf8) oldString563));
+                } else {
+                    charSequence563 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, charSequence563);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F563': "+ unionIndex563));
+            }
+        }
+        int unionIndex564 = (decoder.readIndex());
+        if (unionIndex564 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, null);
+        } else {
+            if (unionIndex564 == 1) {
+                Utf8 charSequence564;
+                Object oldString564 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(564);
+                if (oldString564 instanceof Utf8) {
+                    charSequence564 = (decoder).readString(((Utf8) oldString564));
+                } else {
+                    charSequence564 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, charSequence564);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F564': "+ unionIndex564));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex565 = (decoder.readIndex());
+        if (unionIndex565 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, null);
+        } else {
+            if (unionIndex565 == 1) {
+                Utf8 charSequence565;
+                Object oldString565 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(565);
+                if (oldString565 instanceof Utf8) {
+                    charSequence565 = (decoder).readString(((Utf8) oldString565));
+                } else {
+                    charSequence565 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, charSequence565);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F565': "+ unionIndex565));
+            }
+        }
+        int unionIndex566 = (decoder.readIndex());
+        if (unionIndex566 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, null);
+        } else {
+            if (unionIndex566 == 1) {
+                Utf8 charSequence566;
+                Object oldString566 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(566);
+                if (oldString566 instanceof Utf8) {
+                    charSequence566 = (decoder).readString(((Utf8) oldString566));
+                } else {
+                    charSequence566 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, charSequence566);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F566': "+ unionIndex566));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex567 = (decoder.readIndex());
+        if (unionIndex567 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, null);
+        } else {
+            if (unionIndex567 == 1) {
+                Utf8 charSequence567;
+                Object oldString567 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(567);
+                if (oldString567 instanceof Utf8) {
+                    charSequence567 = (decoder).readString(((Utf8) oldString567));
+                } else {
+                    charSequence567 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, charSequence567);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F567': "+ unionIndex567));
+            }
+        }
+        int unionIndex568 = (decoder.readIndex());
+        if (unionIndex568 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, null);
+        } else {
+            if (unionIndex568 == 1) {
+                Utf8 charSequence568;
+                Object oldString568 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(568);
+                if (oldString568 instanceof Utf8) {
+                    charSequence568 = (decoder).readString(((Utf8) oldString568));
+                } else {
+                    charSequence568 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, charSequence568);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F568': "+ unionIndex568));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex569 = (decoder.readIndex());
+        if (unionIndex569 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, null);
+        } else {
+            if (unionIndex569 == 1) {
+                Utf8 charSequence569;
+                Object oldString569 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(569);
+                if (oldString569 instanceof Utf8) {
+                    charSequence569 = (decoder).readString(((Utf8) oldString569));
+                } else {
+                    charSequence569 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, charSequence569);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F569': "+ unionIndex569));
+            }
+        }
+        int unionIndex570 = (decoder.readIndex());
+        if (unionIndex570 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, null);
+        } else {
+            if (unionIndex570 == 1) {
+                Utf8 charSequence570;
+                Object oldString570 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(570);
+                if (oldString570 instanceof Utf8) {
+                    charSequence570 = (decoder).readString(((Utf8) oldString570));
+                } else {
+                    charSequence570 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, charSequence570);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F570': "+ unionIndex570));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex571 = (decoder.readIndex());
+        if (unionIndex571 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, null);
+        } else {
+            if (unionIndex571 == 1) {
+                Utf8 charSequence571;
+                Object oldString571 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(571);
+                if (oldString571 instanceof Utf8) {
+                    charSequence571 = (decoder).readString(((Utf8) oldString571));
+                } else {
+                    charSequence571 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, charSequence571);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F571': "+ unionIndex571));
+            }
+        }
+        int unionIndex572 = (decoder.readIndex());
+        if (unionIndex572 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, null);
+        } else {
+            if (unionIndex572 == 1) {
+                Utf8 charSequence572;
+                Object oldString572 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(572);
+                if (oldString572 instanceof Utf8) {
+                    charSequence572 = (decoder).readString(((Utf8) oldString572));
+                } else {
+                    charSequence572 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, charSequence572);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F572': "+ unionIndex572));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex573 = (decoder.readIndex());
+        if (unionIndex573 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, null);
+        } else {
+            if (unionIndex573 == 1) {
+                Utf8 charSequence573;
+                Object oldString573 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(573);
+                if (oldString573 instanceof Utf8) {
+                    charSequence573 = (decoder).readString(((Utf8) oldString573));
+                } else {
+                    charSequence573 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, charSequence573);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F573': "+ unionIndex573));
+            }
+        }
+        int unionIndex574 = (decoder.readIndex());
+        if (unionIndex574 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, null);
+        } else {
+            if (unionIndex574 == 1) {
+                Utf8 charSequence574;
+                Object oldString574 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(574);
+                if (oldString574 instanceof Utf8) {
+                    charSequence574 = (decoder).readString(((Utf8) oldString574));
+                } else {
+                    charSequence574 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, charSequence574);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F574': "+ unionIndex574));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex575 = (decoder.readIndex());
+        if (unionIndex575 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, null);
+        } else {
+            if (unionIndex575 == 1) {
+                Utf8 charSequence575;
+                Object oldString575 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(575);
+                if (oldString575 instanceof Utf8) {
+                    charSequence575 = (decoder).readString(((Utf8) oldString575));
+                } else {
+                    charSequence575 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, charSequence575);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F575': "+ unionIndex575));
+            }
+        }
+        int unionIndex576 = (decoder.readIndex());
+        if (unionIndex576 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, null);
+        } else {
+            if (unionIndex576 == 1) {
+                Utf8 charSequence576;
+                Object oldString576 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(576);
+                if (oldString576 instanceof Utf8) {
+                    charSequence576 = (decoder).readString(((Utf8) oldString576));
+                } else {
+                    charSequence576 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, charSequence576);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F576': "+ unionIndex576));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex577 = (decoder.readIndex());
+        if (unionIndex577 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, null);
+        } else {
+            if (unionIndex577 == 1) {
+                Utf8 charSequence577;
+                Object oldString577 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(577);
+                if (oldString577 instanceof Utf8) {
+                    charSequence577 = (decoder).readString(((Utf8) oldString577));
+                } else {
+                    charSequence577 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, charSequence577);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F577': "+ unionIndex577));
+            }
+        }
+        int unionIndex578 = (decoder.readIndex());
+        if (unionIndex578 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, null);
+        } else {
+            if (unionIndex578 == 1) {
+                Utf8 charSequence578;
+                Object oldString578 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(578);
+                if (oldString578 instanceof Utf8) {
+                    charSequence578 = (decoder).readString(((Utf8) oldString578));
+                } else {
+                    charSequence578 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, charSequence578);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F578': "+ unionIndex578));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex579 = (decoder.readIndex());
+        if (unionIndex579 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, null);
+        } else {
+            if (unionIndex579 == 1) {
+                Utf8 charSequence579;
+                Object oldString579 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(579);
+                if (oldString579 instanceof Utf8) {
+                    charSequence579 = (decoder).readString(((Utf8) oldString579));
+                } else {
+                    charSequence579 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, charSequence579);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F579': "+ unionIndex579));
+            }
+        }
+        int unionIndex580 = (decoder.readIndex());
+        if (unionIndex580 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, null);
+        } else {
+            if (unionIndex580 == 1) {
+                Utf8 charSequence580;
+                Object oldString580 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(580);
+                if (oldString580 instanceof Utf8) {
+                    charSequence580 = (decoder).readString(((Utf8) oldString580));
+                } else {
+                    charSequence580 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, charSequence580);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F580': "+ unionIndex580));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex581 = (decoder.readIndex());
+        if (unionIndex581 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, null);
+        } else {
+            if (unionIndex581 == 1) {
+                Utf8 charSequence581;
+                Object oldString581 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(581);
+                if (oldString581 instanceof Utf8) {
+                    charSequence581 = (decoder).readString(((Utf8) oldString581));
+                } else {
+                    charSequence581 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, charSequence581);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F581': "+ unionIndex581));
+            }
+        }
+        int unionIndex582 = (decoder.readIndex());
+        if (unionIndex582 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, null);
+        } else {
+            if (unionIndex582 == 1) {
+                Utf8 charSequence582;
+                Object oldString582 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(582);
+                if (oldString582 instanceof Utf8) {
+                    charSequence582 = (decoder).readString(((Utf8) oldString582));
+                } else {
+                    charSequence582 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, charSequence582);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F582': "+ unionIndex582));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex583 = (decoder.readIndex());
+        if (unionIndex583 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, null);
+        } else {
+            if (unionIndex583 == 1) {
+                Utf8 charSequence583;
+                Object oldString583 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(583);
+                if (oldString583 instanceof Utf8) {
+                    charSequence583 = (decoder).readString(((Utf8) oldString583));
+                } else {
+                    charSequence583 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, charSequence583);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F583': "+ unionIndex583));
+            }
+        }
+        int unionIndex584 = (decoder.readIndex());
+        if (unionIndex584 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, null);
+        } else {
+            if (unionIndex584 == 1) {
+                Utf8 charSequence584;
+                Object oldString584 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(584);
+                if (oldString584 instanceof Utf8) {
+                    charSequence584 = (decoder).readString(((Utf8) oldString584));
+                } else {
+                    charSequence584 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, charSequence584);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F584': "+ unionIndex584));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex585 = (decoder.readIndex());
+        if (unionIndex585 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, null);
+        } else {
+            if (unionIndex585 == 1) {
+                Utf8 charSequence585;
+                Object oldString585 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(585);
+                if (oldString585 instanceof Utf8) {
+                    charSequence585 = (decoder).readString(((Utf8) oldString585));
+                } else {
+                    charSequence585 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, charSequence585);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F585': "+ unionIndex585));
+            }
+        }
+        int unionIndex586 = (decoder.readIndex());
+        if (unionIndex586 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, null);
+        } else {
+            if (unionIndex586 == 1) {
+                Utf8 charSequence586;
+                Object oldString586 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(586);
+                if (oldString586 instanceof Utf8) {
+                    charSequence586 = (decoder).readString(((Utf8) oldString586));
+                } else {
+                    charSequence586 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, charSequence586);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F586': "+ unionIndex586));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex587 = (decoder.readIndex());
+        if (unionIndex587 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, null);
+        } else {
+            if (unionIndex587 == 1) {
+                Utf8 charSequence587;
+                Object oldString587 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(587);
+                if (oldString587 instanceof Utf8) {
+                    charSequence587 = (decoder).readString(((Utf8) oldString587));
+                } else {
+                    charSequence587 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, charSequence587);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F587': "+ unionIndex587));
+            }
+        }
+        int unionIndex588 = (decoder.readIndex());
+        if (unionIndex588 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, null);
+        } else {
+            if (unionIndex588 == 1) {
+                Utf8 charSequence588;
+                Object oldString588 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(588);
+                if (oldString588 instanceof Utf8) {
+                    charSequence588 = (decoder).readString(((Utf8) oldString588));
+                } else {
+                    charSequence588 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, charSequence588);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F588': "+ unionIndex588));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex589 = (decoder.readIndex());
+        if (unionIndex589 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, null);
+        } else {
+            if (unionIndex589 == 1) {
+                Utf8 charSequence589;
+                Object oldString589 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(589);
+                if (oldString589 instanceof Utf8) {
+                    charSequence589 = (decoder).readString(((Utf8) oldString589));
+                } else {
+                    charSequence589 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, charSequence589);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F589': "+ unionIndex589));
+            }
+        }
+        int unionIndex590 = (decoder.readIndex());
+        if (unionIndex590 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, null);
+        } else {
+            if (unionIndex590 == 1) {
+                Utf8 charSequence590;
+                Object oldString590 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(590);
+                if (oldString590 instanceof Utf8) {
+                    charSequence590 = (decoder).readString(((Utf8) oldString590));
+                } else {
+                    charSequence590 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, charSequence590);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F590': "+ unionIndex590));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex591 = (decoder.readIndex());
+        if (unionIndex591 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, null);
+        } else {
+            if (unionIndex591 == 1) {
+                Utf8 charSequence591;
+                Object oldString591 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(591);
+                if (oldString591 instanceof Utf8) {
+                    charSequence591 = (decoder).readString(((Utf8) oldString591));
+                } else {
+                    charSequence591 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, charSequence591);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F591': "+ unionIndex591));
+            }
+        }
+        int unionIndex592 = (decoder.readIndex());
+        if (unionIndex592 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, null);
+        } else {
+            if (unionIndex592 == 1) {
+                Utf8 charSequence592;
+                Object oldString592 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(592);
+                if (oldString592 instanceof Utf8) {
+                    charSequence592 = (decoder).readString(((Utf8) oldString592));
+                } else {
+                    charSequence592 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, charSequence592);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F592': "+ unionIndex592));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex593 = (decoder.readIndex());
+        if (unionIndex593 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, null);
+        } else {
+            if (unionIndex593 == 1) {
+                Utf8 charSequence593;
+                Object oldString593 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(593);
+                if (oldString593 instanceof Utf8) {
+                    charSequence593 = (decoder).readString(((Utf8) oldString593));
+                } else {
+                    charSequence593 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, charSequence593);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F593': "+ unionIndex593));
+            }
+        }
+        int unionIndex594 = (decoder.readIndex());
+        if (unionIndex594 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, null);
+        } else {
+            if (unionIndex594 == 1) {
+                Utf8 charSequence594;
+                Object oldString594 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(594);
+                if (oldString594 instanceof Utf8) {
+                    charSequence594 = (decoder).readString(((Utf8) oldString594));
+                } else {
+                    charSequence594 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, charSequence594);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F594': "+ unionIndex594));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex595 = (decoder.readIndex());
+        if (unionIndex595 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, null);
+        } else {
+            if (unionIndex595 == 1) {
+                Utf8 charSequence595;
+                Object oldString595 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(595);
+                if (oldString595 instanceof Utf8) {
+                    charSequence595 = (decoder).readString(((Utf8) oldString595));
+                } else {
+                    charSequence595 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, charSequence595);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F595': "+ unionIndex595));
+            }
+        }
+        int unionIndex596 = (decoder.readIndex());
+        if (unionIndex596 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, null);
+        } else {
+            if (unionIndex596 == 1) {
+                Utf8 charSequence596;
+                Object oldString596 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(596);
+                if (oldString596 instanceof Utf8) {
+                    charSequence596 = (decoder).readString(((Utf8) oldString596));
+                } else {
+                    charSequence596 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, charSequence596);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F596': "+ unionIndex596));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex597 = (decoder.readIndex());
+        if (unionIndex597 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, null);
+        } else {
+            if (unionIndex597 == 1) {
+                Utf8 charSequence597;
+                Object oldString597 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(597);
+                if (oldString597 instanceof Utf8) {
+                    charSequence597 = (decoder).readString(((Utf8) oldString597));
+                } else {
+                    charSequence597 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, charSequence597);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F597': "+ unionIndex597));
+            }
+        }
+        int unionIndex598 = (decoder.readIndex());
+        if (unionIndex598 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, null);
+        } else {
+            if (unionIndex598 == 1) {
+                Utf8 charSequence598;
+                Object oldString598 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(598);
+                if (oldString598 instanceof Utf8) {
+                    charSequence598 = (decoder).readString(((Utf8) oldString598));
+                } else {
+                    charSequence598 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, charSequence598);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F598': "+ unionIndex598));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex599 = (decoder.readIndex());
+        if (unionIndex599 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, null);
+        } else {
+            if (unionIndex599 == 1) {
+                Utf8 charSequence599;
+                Object oldString599 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(599);
+                if (oldString599 instanceof Utf8) {
+                    charSequence599 = (decoder).readString(((Utf8) oldString599));
+                } else {
+                    charSequence599 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, charSequence599);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F599': "+ unionIndex599));
+            }
+        }
+        int unionIndex600 = (decoder.readIndex());
+        if (unionIndex600 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, null);
+        } else {
+            if (unionIndex600 == 1) {
+                Utf8 charSequence600;
+                Object oldString600 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(600);
+                if (oldString600 instanceof Utf8) {
+                    charSequence600 = (decoder).readString(((Utf8) oldString600));
+                } else {
+                    charSequence600 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, charSequence600);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F600': "+ unionIndex600));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex601 = (decoder.readIndex());
+        if (unionIndex601 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, null);
+        } else {
+            if (unionIndex601 == 1) {
+                Utf8 charSequence601;
+                Object oldString601 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(601);
+                if (oldString601 instanceof Utf8) {
+                    charSequence601 = (decoder).readString(((Utf8) oldString601));
+                } else {
+                    charSequence601 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, charSequence601);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F601': "+ unionIndex601));
+            }
+        }
+        int unionIndex602 = (decoder.readIndex());
+        if (unionIndex602 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, null);
+        } else {
+            if (unionIndex602 == 1) {
+                Utf8 charSequence602;
+                Object oldString602 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(602);
+                if (oldString602 instanceof Utf8) {
+                    charSequence602 = (decoder).readString(((Utf8) oldString602));
+                } else {
+                    charSequence602 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, charSequence602);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F602': "+ unionIndex602));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex603 = (decoder.readIndex());
+        if (unionIndex603 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, null);
+        } else {
+            if (unionIndex603 == 1) {
+                Utf8 charSequence603;
+                Object oldString603 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(603);
+                if (oldString603 instanceof Utf8) {
+                    charSequence603 = (decoder).readString(((Utf8) oldString603));
+                } else {
+                    charSequence603 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, charSequence603);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F603': "+ unionIndex603));
+            }
+        }
+        int unionIndex604 = (decoder.readIndex());
+        if (unionIndex604 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, null);
+        } else {
+            if (unionIndex604 == 1) {
+                Utf8 charSequence604;
+                Object oldString604 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(604);
+                if (oldString604 instanceof Utf8) {
+                    charSequence604 = (decoder).readString(((Utf8) oldString604));
+                } else {
+                    charSequence604 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, charSequence604);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F604': "+ unionIndex604));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex605 = (decoder.readIndex());
+        if (unionIndex605 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, null);
+        } else {
+            if (unionIndex605 == 1) {
+                Utf8 charSequence605;
+                Object oldString605 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(605);
+                if (oldString605 instanceof Utf8) {
+                    charSequence605 = (decoder).readString(((Utf8) oldString605));
+                } else {
+                    charSequence605 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, charSequence605);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F605': "+ unionIndex605));
+            }
+        }
+        int unionIndex606 = (decoder.readIndex());
+        if (unionIndex606 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, null);
+        } else {
+            if (unionIndex606 == 1) {
+                Utf8 charSequence606;
+                Object oldString606 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(606);
+                if (oldString606 instanceof Utf8) {
+                    charSequence606 = (decoder).readString(((Utf8) oldString606));
+                } else {
+                    charSequence606 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, charSequence606);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F606': "+ unionIndex606));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex607 = (decoder.readIndex());
+        if (unionIndex607 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, null);
+        } else {
+            if (unionIndex607 == 1) {
+                Utf8 charSequence607;
+                Object oldString607 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(607);
+                if (oldString607 instanceof Utf8) {
+                    charSequence607 = (decoder).readString(((Utf8) oldString607));
+                } else {
+                    charSequence607 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, charSequence607);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F607': "+ unionIndex607));
+            }
+        }
+        int unionIndex608 = (decoder.readIndex());
+        if (unionIndex608 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, null);
+        } else {
+            if (unionIndex608 == 1) {
+                Utf8 charSequence608;
+                Object oldString608 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(608);
+                if (oldString608 instanceof Utf8) {
+                    charSequence608 = (decoder).readString(((Utf8) oldString608));
+                } else {
+                    charSequence608 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, charSequence608);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F608': "+ unionIndex608));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex609 = (decoder.readIndex());
+        if (unionIndex609 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, null);
+        } else {
+            if (unionIndex609 == 1) {
+                Utf8 charSequence609;
+                Object oldString609 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(609);
+                if (oldString609 instanceof Utf8) {
+                    charSequence609 = (decoder).readString(((Utf8) oldString609));
+                } else {
+                    charSequence609 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, charSequence609);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F609': "+ unionIndex609));
+            }
+        }
+        int unionIndex610 = (decoder.readIndex());
+        if (unionIndex610 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, null);
+        } else {
+            if (unionIndex610 == 1) {
+                Utf8 charSequence610;
+                Object oldString610 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(610);
+                if (oldString610 instanceof Utf8) {
+                    charSequence610 = (decoder).readString(((Utf8) oldString610));
+                } else {
+                    charSequence610 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, charSequence610);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F610': "+ unionIndex610));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex611 = (decoder.readIndex());
+        if (unionIndex611 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, null);
+        } else {
+            if (unionIndex611 == 1) {
+                Utf8 charSequence611;
+                Object oldString611 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(611);
+                if (oldString611 instanceof Utf8) {
+                    charSequence611 = (decoder).readString(((Utf8) oldString611));
+                } else {
+                    charSequence611 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, charSequence611);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F611': "+ unionIndex611));
+            }
+        }
+        int unionIndex612 = (decoder.readIndex());
+        if (unionIndex612 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, null);
+        } else {
+            if (unionIndex612 == 1) {
+                Utf8 charSequence612;
+                Object oldString612 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(612);
+                if (oldString612 instanceof Utf8) {
+                    charSequence612 = (decoder).readString(((Utf8) oldString612));
+                } else {
+                    charSequence612 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, charSequence612);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F612': "+ unionIndex612));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex613 = (decoder.readIndex());
+        if (unionIndex613 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, null);
+        } else {
+            if (unionIndex613 == 1) {
+                Utf8 charSequence613;
+                Object oldString613 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(613);
+                if (oldString613 instanceof Utf8) {
+                    charSequence613 = (decoder).readString(((Utf8) oldString613));
+                } else {
+                    charSequence613 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, charSequence613);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F613': "+ unionIndex613));
+            }
+        }
+        int unionIndex614 = (decoder.readIndex());
+        if (unionIndex614 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, null);
+        } else {
+            if (unionIndex614 == 1) {
+                Utf8 charSequence614;
+                Object oldString614 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(614);
+                if (oldString614 instanceof Utf8) {
+                    charSequence614 = (decoder).readString(((Utf8) oldString614));
+                } else {
+                    charSequence614 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, charSequence614);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F614': "+ unionIndex614));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex615 = (decoder.readIndex());
+        if (unionIndex615 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, null);
+        } else {
+            if (unionIndex615 == 1) {
+                Utf8 charSequence615;
+                Object oldString615 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(615);
+                if (oldString615 instanceof Utf8) {
+                    charSequence615 = (decoder).readString(((Utf8) oldString615));
+                } else {
+                    charSequence615 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, charSequence615);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F615': "+ unionIndex615));
+            }
+        }
+        int unionIndex616 = (decoder.readIndex());
+        if (unionIndex616 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, null);
+        } else {
+            if (unionIndex616 == 1) {
+                Utf8 charSequence616;
+                Object oldString616 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(616);
+                if (oldString616 instanceof Utf8) {
+                    charSequence616 = (decoder).readString(((Utf8) oldString616));
+                } else {
+                    charSequence616 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, charSequence616);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F616': "+ unionIndex616));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex617 = (decoder.readIndex());
+        if (unionIndex617 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, null);
+        } else {
+            if (unionIndex617 == 1) {
+                Utf8 charSequence617;
+                Object oldString617 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(617);
+                if (oldString617 instanceof Utf8) {
+                    charSequence617 = (decoder).readString(((Utf8) oldString617));
+                } else {
+                    charSequence617 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, charSequence617);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F617': "+ unionIndex617));
+            }
+        }
+        int unionIndex618 = (decoder.readIndex());
+        if (unionIndex618 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, null);
+        } else {
+            if (unionIndex618 == 1) {
+                Utf8 charSequence618;
+                Object oldString618 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(618);
+                if (oldString618 instanceof Utf8) {
+                    charSequence618 = (decoder).readString(((Utf8) oldString618));
+                } else {
+                    charSequence618 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, charSequence618);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F618': "+ unionIndex618));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex619 = (decoder.readIndex());
+        if (unionIndex619 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, null);
+        } else {
+            if (unionIndex619 == 1) {
+                Utf8 charSequence619;
+                Object oldString619 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(619);
+                if (oldString619 instanceof Utf8) {
+                    charSequence619 = (decoder).readString(((Utf8) oldString619));
+                } else {
+                    charSequence619 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, charSequence619);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F619': "+ unionIndex619));
+            }
+        }
+        int unionIndex620 = (decoder.readIndex());
+        if (unionIndex620 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, null);
+        } else {
+            if (unionIndex620 == 1) {
+                Utf8 charSequence620;
+                Object oldString620 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(620);
+                if (oldString620 instanceof Utf8) {
+                    charSequence620 = (decoder).readString(((Utf8) oldString620));
+                } else {
+                    charSequence620 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, charSequence620);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F620': "+ unionIndex620));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex621 = (decoder.readIndex());
+        if (unionIndex621 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, null);
+        } else {
+            if (unionIndex621 == 1) {
+                Utf8 charSequence621;
+                Object oldString621 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(621);
+                if (oldString621 instanceof Utf8) {
+                    charSequence621 = (decoder).readString(((Utf8) oldString621));
+                } else {
+                    charSequence621 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, charSequence621);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F621': "+ unionIndex621));
+            }
+        }
+        int unionIndex622 = (decoder.readIndex());
+        if (unionIndex622 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, null);
+        } else {
+            if (unionIndex622 == 1) {
+                Utf8 charSequence622;
+                Object oldString622 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(622);
+                if (oldString622 instanceof Utf8) {
+                    charSequence622 = (decoder).readString(((Utf8) oldString622));
+                } else {
+                    charSequence622 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, charSequence622);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F622': "+ unionIndex622));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex623 = (decoder.readIndex());
+        if (unionIndex623 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, null);
+        } else {
+            if (unionIndex623 == 1) {
+                Utf8 charSequence623;
+                Object oldString623 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(623);
+                if (oldString623 instanceof Utf8) {
+                    charSequence623 = (decoder).readString(((Utf8) oldString623));
+                } else {
+                    charSequence623 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, charSequence623);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F623': "+ unionIndex623));
+            }
+        }
+        int unionIndex624 = (decoder.readIndex());
+        if (unionIndex624 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, null);
+        } else {
+            if (unionIndex624 == 1) {
+                Utf8 charSequence624;
+                Object oldString624 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(624);
+                if (oldString624 instanceof Utf8) {
+                    charSequence624 = (decoder).readString(((Utf8) oldString624));
+                } else {
+                    charSequence624 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, charSequence624);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F624': "+ unionIndex624));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex625 = (decoder.readIndex());
+        if (unionIndex625 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, null);
+        } else {
+            if (unionIndex625 == 1) {
+                Utf8 charSequence625;
+                Object oldString625 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(625);
+                if (oldString625 instanceof Utf8) {
+                    charSequence625 = (decoder).readString(((Utf8) oldString625));
+                } else {
+                    charSequence625 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, charSequence625);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F625': "+ unionIndex625));
+            }
+        }
+        int unionIndex626 = (decoder.readIndex());
+        if (unionIndex626 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, null);
+        } else {
+            if (unionIndex626 == 1) {
+                Utf8 charSequence626;
+                Object oldString626 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(626);
+                if (oldString626 instanceof Utf8) {
+                    charSequence626 = (decoder).readString(((Utf8) oldString626));
+                } else {
+                    charSequence626 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, charSequence626);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F626': "+ unionIndex626));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex627 = (decoder.readIndex());
+        if (unionIndex627 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, null);
+        } else {
+            if (unionIndex627 == 1) {
+                Utf8 charSequence627;
+                Object oldString627 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(627);
+                if (oldString627 instanceof Utf8) {
+                    charSequence627 = (decoder).readString(((Utf8) oldString627));
+                } else {
+                    charSequence627 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, charSequence627);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F627': "+ unionIndex627));
+            }
+        }
+        int unionIndex628 = (decoder.readIndex());
+        if (unionIndex628 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, null);
+        } else {
+            if (unionIndex628 == 1) {
+                Utf8 charSequence628;
+                Object oldString628 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(628);
+                if (oldString628 instanceof Utf8) {
+                    charSequence628 = (decoder).readString(((Utf8) oldString628));
+                } else {
+                    charSequence628 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, charSequence628);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F628': "+ unionIndex628));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex629 = (decoder.readIndex());
+        if (unionIndex629 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, null);
+        } else {
+            if (unionIndex629 == 1) {
+                Utf8 charSequence629;
+                Object oldString629 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(629);
+                if (oldString629 instanceof Utf8) {
+                    charSequence629 = (decoder).readString(((Utf8) oldString629));
+                } else {
+                    charSequence629 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, charSequence629);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F629': "+ unionIndex629));
+            }
+        }
+        int unionIndex630 = (decoder.readIndex());
+        if (unionIndex630 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, null);
+        } else {
+            if (unionIndex630 == 1) {
+                Utf8 charSequence630;
+                Object oldString630 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(630);
+                if (oldString630 instanceof Utf8) {
+                    charSequence630 = (decoder).readString(((Utf8) oldString630));
+                } else {
+                    charSequence630 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, charSequence630);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F630': "+ unionIndex630));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex631 = (decoder.readIndex());
+        if (unionIndex631 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, null);
+        } else {
+            if (unionIndex631 == 1) {
+                Utf8 charSequence631;
+                Object oldString631 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(631);
+                if (oldString631 instanceof Utf8) {
+                    charSequence631 = (decoder).readString(((Utf8) oldString631));
+                } else {
+                    charSequence631 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, charSequence631);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F631': "+ unionIndex631));
+            }
+        }
+        int unionIndex632 = (decoder.readIndex());
+        if (unionIndex632 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, null);
+        } else {
+            if (unionIndex632 == 1) {
+                Utf8 charSequence632;
+                Object oldString632 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(632);
+                if (oldString632 instanceof Utf8) {
+                    charSequence632 = (decoder).readString(((Utf8) oldString632));
+                } else {
+                    charSequence632 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, charSequence632);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F632': "+ unionIndex632));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex633 = (decoder.readIndex());
+        if (unionIndex633 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, null);
+        } else {
+            if (unionIndex633 == 1) {
+                Utf8 charSequence633;
+                Object oldString633 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(633);
+                if (oldString633 instanceof Utf8) {
+                    charSequence633 = (decoder).readString(((Utf8) oldString633));
+                } else {
+                    charSequence633 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, charSequence633);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F633': "+ unionIndex633));
+            }
+        }
+        int unionIndex634 = (decoder.readIndex());
+        if (unionIndex634 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, null);
+        } else {
+            if (unionIndex634 == 1) {
+                Utf8 charSequence634;
+                Object oldString634 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(634);
+                if (oldString634 instanceof Utf8) {
+                    charSequence634 = (decoder).readString(((Utf8) oldString634));
+                } else {
+                    charSequence634 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, charSequence634);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F634': "+ unionIndex634));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex635 = (decoder.readIndex());
+        if (unionIndex635 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, null);
+        } else {
+            if (unionIndex635 == 1) {
+                Utf8 charSequence635;
+                Object oldString635 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(635);
+                if (oldString635 instanceof Utf8) {
+                    charSequence635 = (decoder).readString(((Utf8) oldString635));
+                } else {
+                    charSequence635 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, charSequence635);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F635': "+ unionIndex635));
+            }
+        }
+        int unionIndex636 = (decoder.readIndex());
+        if (unionIndex636 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, null);
+        } else {
+            if (unionIndex636 == 1) {
+                Utf8 charSequence636;
+                Object oldString636 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(636);
+                if (oldString636 instanceof Utf8) {
+                    charSequence636 = (decoder).readString(((Utf8) oldString636));
+                } else {
+                    charSequence636 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, charSequence636);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F636': "+ unionIndex636));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex637 = (decoder.readIndex());
+        if (unionIndex637 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, null);
+        } else {
+            if (unionIndex637 == 1) {
+                Utf8 charSequence637;
+                Object oldString637 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(637);
+                if (oldString637 instanceof Utf8) {
+                    charSequence637 = (decoder).readString(((Utf8) oldString637));
+                } else {
+                    charSequence637 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, charSequence637);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F637': "+ unionIndex637));
+            }
+        }
+        int unionIndex638 = (decoder.readIndex());
+        if (unionIndex638 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, null);
+        } else {
+            if (unionIndex638 == 1) {
+                Utf8 charSequence638;
+                Object oldString638 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(638);
+                if (oldString638 instanceof Utf8) {
+                    charSequence638 = (decoder).readString(((Utf8) oldString638));
+                } else {
+                    charSequence638 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, charSequence638);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F638': "+ unionIndex638));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex639 = (decoder.readIndex());
+        if (unionIndex639 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, null);
+        } else {
+            if (unionIndex639 == 1) {
+                Utf8 charSequence639;
+                Object oldString639 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(639);
+                if (oldString639 instanceof Utf8) {
+                    charSequence639 = (decoder).readString(((Utf8) oldString639));
+                } else {
+                    charSequence639 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, charSequence639);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F639': "+ unionIndex639));
+            }
+        }
+        int unionIndex640 = (decoder.readIndex());
+        if (unionIndex640 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, null);
+        } else {
+            if (unionIndex640 == 1) {
+                Utf8 charSequence640;
+                Object oldString640 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(640);
+                if (oldString640 instanceof Utf8) {
+                    charSequence640 = (decoder).readString(((Utf8) oldString640));
+                } else {
+                    charSequence640 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, charSequence640);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F640': "+ unionIndex640));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex641 = (decoder.readIndex());
+        if (unionIndex641 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, null);
+        } else {
+            if (unionIndex641 == 1) {
+                Utf8 charSequence641;
+                Object oldString641 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(641);
+                if (oldString641 instanceof Utf8) {
+                    charSequence641 = (decoder).readString(((Utf8) oldString641));
+                } else {
+                    charSequence641 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, charSequence641);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F641': "+ unionIndex641));
+            }
+        }
+        int unionIndex642 = (decoder.readIndex());
+        if (unionIndex642 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, null);
+        } else {
+            if (unionIndex642 == 1) {
+                Utf8 charSequence642;
+                Object oldString642 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(642);
+                if (oldString642 instanceof Utf8) {
+                    charSequence642 = (decoder).readString(((Utf8) oldString642));
+                } else {
+                    charSequence642 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, charSequence642);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F642': "+ unionIndex642));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex643 = (decoder.readIndex());
+        if (unionIndex643 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, null);
+        } else {
+            if (unionIndex643 == 1) {
+                Utf8 charSequence643;
+                Object oldString643 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(643);
+                if (oldString643 instanceof Utf8) {
+                    charSequence643 = (decoder).readString(((Utf8) oldString643));
+                } else {
+                    charSequence643 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, charSequence643);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F643': "+ unionIndex643));
+            }
+        }
+        int unionIndex644 = (decoder.readIndex());
+        if (unionIndex644 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, null);
+        } else {
+            if (unionIndex644 == 1) {
+                Utf8 charSequence644;
+                Object oldString644 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(644);
+                if (oldString644 instanceof Utf8) {
+                    charSequence644 = (decoder).readString(((Utf8) oldString644));
+                } else {
+                    charSequence644 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, charSequence644);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F644': "+ unionIndex644));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex645 = (decoder.readIndex());
+        if (unionIndex645 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, null);
+        } else {
+            if (unionIndex645 == 1) {
+                Utf8 charSequence645;
+                Object oldString645 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(645);
+                if (oldString645 instanceof Utf8) {
+                    charSequence645 = (decoder).readString(((Utf8) oldString645));
+                } else {
+                    charSequence645 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, charSequence645);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F645': "+ unionIndex645));
+            }
+        }
+        int unionIndex646 = (decoder.readIndex());
+        if (unionIndex646 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, null);
+        } else {
+            if (unionIndex646 == 1) {
+                Utf8 charSequence646;
+                Object oldString646 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(646);
+                if (oldString646 instanceof Utf8) {
+                    charSequence646 = (decoder).readString(((Utf8) oldString646));
+                } else {
+                    charSequence646 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, charSequence646);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F646': "+ unionIndex646));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex647 = (decoder.readIndex());
+        if (unionIndex647 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, null);
+        } else {
+            if (unionIndex647 == 1) {
+                Utf8 charSequence647;
+                Object oldString647 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(647);
+                if (oldString647 instanceof Utf8) {
+                    charSequence647 = (decoder).readString(((Utf8) oldString647));
+                } else {
+                    charSequence647 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, charSequence647);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F647': "+ unionIndex647));
+            }
+        }
+        int unionIndex648 = (decoder.readIndex());
+        if (unionIndex648 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, null);
+        } else {
+            if (unionIndex648 == 1) {
+                Utf8 charSequence648;
+                Object oldString648 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(648);
+                if (oldString648 instanceof Utf8) {
+                    charSequence648 = (decoder).readString(((Utf8) oldString648));
+                } else {
+                    charSequence648 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, charSequence648);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F648': "+ unionIndex648));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex649 = (decoder.readIndex());
+        if (unionIndex649 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, null);
+        } else {
+            if (unionIndex649 == 1) {
+                Utf8 charSequence649;
+                Object oldString649 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(649);
+                if (oldString649 instanceof Utf8) {
+                    charSequence649 = (decoder).readString(((Utf8) oldString649));
+                } else {
+                    charSequence649 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, charSequence649);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F649': "+ unionIndex649));
+            }
+        }
+        int unionIndex650 = (decoder.readIndex());
+        if (unionIndex650 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, null);
+        } else {
+            if (unionIndex650 == 1) {
+                Utf8 charSequence650;
+                Object oldString650 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(650);
+                if (oldString650 instanceof Utf8) {
+                    charSequence650 = (decoder).readString(((Utf8) oldString650));
+                } else {
+                    charSequence650 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, charSequence650);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F650': "+ unionIndex650));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex651 = (decoder.readIndex());
+        if (unionIndex651 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, null);
+        } else {
+            if (unionIndex651 == 1) {
+                Utf8 charSequence651;
+                Object oldString651 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(651);
+                if (oldString651 instanceof Utf8) {
+                    charSequence651 = (decoder).readString(((Utf8) oldString651));
+                } else {
+                    charSequence651 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, charSequence651);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F651': "+ unionIndex651));
+            }
+        }
+        int unionIndex652 = (decoder.readIndex());
+        if (unionIndex652 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, null);
+        } else {
+            if (unionIndex652 == 1) {
+                Utf8 charSequence652;
+                Object oldString652 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(652);
+                if (oldString652 instanceof Utf8) {
+                    charSequence652 = (decoder).readString(((Utf8) oldString652));
+                } else {
+                    charSequence652 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, charSequence652);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F652': "+ unionIndex652));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex653 = (decoder.readIndex());
+        if (unionIndex653 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, null);
+        } else {
+            if (unionIndex653 == 1) {
+                Utf8 charSequence653;
+                Object oldString653 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(653);
+                if (oldString653 instanceof Utf8) {
+                    charSequence653 = (decoder).readString(((Utf8) oldString653));
+                } else {
+                    charSequence653 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, charSequence653);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F653': "+ unionIndex653));
+            }
+        }
+        int unionIndex654 = (decoder.readIndex());
+        if (unionIndex654 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, null);
+        } else {
+            if (unionIndex654 == 1) {
+                Utf8 charSequence654;
+                Object oldString654 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(654);
+                if (oldString654 instanceof Utf8) {
+                    charSequence654 = (decoder).readString(((Utf8) oldString654));
+                } else {
+                    charSequence654 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, charSequence654);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F654': "+ unionIndex654));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex655 = (decoder.readIndex());
+        if (unionIndex655 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, null);
+        } else {
+            if (unionIndex655 == 1) {
+                Utf8 charSequence655;
+                Object oldString655 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(655);
+                if (oldString655 instanceof Utf8) {
+                    charSequence655 = (decoder).readString(((Utf8) oldString655));
+                } else {
+                    charSequence655 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, charSequence655);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F655': "+ unionIndex655));
+            }
+        }
+        int unionIndex656 = (decoder.readIndex());
+        if (unionIndex656 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, null);
+        } else {
+            if (unionIndex656 == 1) {
+                Utf8 charSequence656;
+                Object oldString656 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(656);
+                if (oldString656 instanceof Utf8) {
+                    charSequence656 = (decoder).readString(((Utf8) oldString656));
+                } else {
+                    charSequence656 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, charSequence656);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F656': "+ unionIndex656));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex657 = (decoder.readIndex());
+        if (unionIndex657 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, null);
+        } else {
+            if (unionIndex657 == 1) {
+                Utf8 charSequence657;
+                Object oldString657 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(657);
+                if (oldString657 instanceof Utf8) {
+                    charSequence657 = (decoder).readString(((Utf8) oldString657));
+                } else {
+                    charSequence657 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, charSequence657);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F657': "+ unionIndex657));
+            }
+        }
+        int unionIndex658 = (decoder.readIndex());
+        if (unionIndex658 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, null);
+        } else {
+            if (unionIndex658 == 1) {
+                Utf8 charSequence658;
+                Object oldString658 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(658);
+                if (oldString658 instanceof Utf8) {
+                    charSequence658 = (decoder).readString(((Utf8) oldString658));
+                } else {
+                    charSequence658 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, charSequence658);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F658': "+ unionIndex658));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex659 = (decoder.readIndex());
+        if (unionIndex659 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, null);
+        } else {
+            if (unionIndex659 == 1) {
+                Utf8 charSequence659;
+                Object oldString659 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(659);
+                if (oldString659 instanceof Utf8) {
+                    charSequence659 = (decoder).readString(((Utf8) oldString659));
+                } else {
+                    charSequence659 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, charSequence659);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F659': "+ unionIndex659));
+            }
+        }
+        int unionIndex660 = (decoder.readIndex());
+        if (unionIndex660 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, null);
+        } else {
+            if (unionIndex660 == 1) {
+                Utf8 charSequence660;
+                Object oldString660 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(660);
+                if (oldString660 instanceof Utf8) {
+                    charSequence660 = (decoder).readString(((Utf8) oldString660));
+                } else {
+                    charSequence660 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, charSequence660);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F660': "+ unionIndex660));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex661 = (decoder.readIndex());
+        if (unionIndex661 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, null);
+        } else {
+            if (unionIndex661 == 1) {
+                Utf8 charSequence661;
+                Object oldString661 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(661);
+                if (oldString661 instanceof Utf8) {
+                    charSequence661 = (decoder).readString(((Utf8) oldString661));
+                } else {
+                    charSequence661 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, charSequence661);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F661': "+ unionIndex661));
+            }
+        }
+        int unionIndex662 = (decoder.readIndex());
+        if (unionIndex662 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, null);
+        } else {
+            if (unionIndex662 == 1) {
+                Utf8 charSequence662;
+                Object oldString662 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(662);
+                if (oldString662 instanceof Utf8) {
+                    charSequence662 = (decoder).readString(((Utf8) oldString662));
+                } else {
+                    charSequence662 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, charSequence662);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F662': "+ unionIndex662));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex663 = (decoder.readIndex());
+        if (unionIndex663 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, null);
+        } else {
+            if (unionIndex663 == 1) {
+                Utf8 charSequence663;
+                Object oldString663 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(663);
+                if (oldString663 instanceof Utf8) {
+                    charSequence663 = (decoder).readString(((Utf8) oldString663));
+                } else {
+                    charSequence663 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, charSequence663);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F663': "+ unionIndex663));
+            }
+        }
+        int unionIndex664 = (decoder.readIndex());
+        if (unionIndex664 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, null);
+        } else {
+            if (unionIndex664 == 1) {
+                Utf8 charSequence664;
+                Object oldString664 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(664);
+                if (oldString664 instanceof Utf8) {
+                    charSequence664 = (decoder).readString(((Utf8) oldString664));
+                } else {
+                    charSequence664 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, charSequence664);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F664': "+ unionIndex664));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex665 = (decoder.readIndex());
+        if (unionIndex665 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, null);
+        } else {
+            if (unionIndex665 == 1) {
+                Utf8 charSequence665;
+                Object oldString665 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(665);
+                if (oldString665 instanceof Utf8) {
+                    charSequence665 = (decoder).readString(((Utf8) oldString665));
+                } else {
+                    charSequence665 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, charSequence665);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F665': "+ unionIndex665));
+            }
+        }
+        int unionIndex666 = (decoder.readIndex());
+        if (unionIndex666 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, null);
+        } else {
+            if (unionIndex666 == 1) {
+                Utf8 charSequence666;
+                Object oldString666 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(666);
+                if (oldString666 instanceof Utf8) {
+                    charSequence666 = (decoder).readString(((Utf8) oldString666));
+                } else {
+                    charSequence666 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, charSequence666);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F666': "+ unionIndex666));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex667 = (decoder.readIndex());
+        if (unionIndex667 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, null);
+        } else {
+            if (unionIndex667 == 1) {
+                Utf8 charSequence667;
+                Object oldString667 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(667);
+                if (oldString667 instanceof Utf8) {
+                    charSequence667 = (decoder).readString(((Utf8) oldString667));
+                } else {
+                    charSequence667 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, charSequence667);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F667': "+ unionIndex667));
+            }
+        }
+        int unionIndex668 = (decoder.readIndex());
+        if (unionIndex668 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, null);
+        } else {
+            if (unionIndex668 == 1) {
+                Utf8 charSequence668;
+                Object oldString668 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(668);
+                if (oldString668 instanceof Utf8) {
+                    charSequence668 = (decoder).readString(((Utf8) oldString668));
+                } else {
+                    charSequence668 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, charSequence668);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F668': "+ unionIndex668));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex669 = (decoder.readIndex());
+        if (unionIndex669 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, null);
+        } else {
+            if (unionIndex669 == 1) {
+                Utf8 charSequence669;
+                Object oldString669 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(669);
+                if (oldString669 instanceof Utf8) {
+                    charSequence669 = (decoder).readString(((Utf8) oldString669));
+                } else {
+                    charSequence669 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, charSequence669);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F669': "+ unionIndex669));
+            }
+        }
+        int unionIndex670 = (decoder.readIndex());
+        if (unionIndex670 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, null);
+        } else {
+            if (unionIndex670 == 1) {
+                Utf8 charSequence670;
+                Object oldString670 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(670);
+                if (oldString670 instanceof Utf8) {
+                    charSequence670 = (decoder).readString(((Utf8) oldString670));
+                } else {
+                    charSequence670 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, charSequence670);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F670': "+ unionIndex670));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex671 = (decoder.readIndex());
+        if (unionIndex671 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, null);
+        } else {
+            if (unionIndex671 == 1) {
+                Utf8 charSequence671;
+                Object oldString671 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(671);
+                if (oldString671 instanceof Utf8) {
+                    charSequence671 = (decoder).readString(((Utf8) oldString671));
+                } else {
+                    charSequence671 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, charSequence671);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F671': "+ unionIndex671));
+            }
+        }
+        int unionIndex672 = (decoder.readIndex());
+        if (unionIndex672 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, null);
+        } else {
+            if (unionIndex672 == 1) {
+                Utf8 charSequence672;
+                Object oldString672 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(672);
+                if (oldString672 instanceof Utf8) {
+                    charSequence672 = (decoder).readString(((Utf8) oldString672));
+                } else {
+                    charSequence672 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, charSequence672);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F672': "+ unionIndex672));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex673 = (decoder.readIndex());
+        if (unionIndex673 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, null);
+        } else {
+            if (unionIndex673 == 1) {
+                Utf8 charSequence673;
+                Object oldString673 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(673);
+                if (oldString673 instanceof Utf8) {
+                    charSequence673 = (decoder).readString(((Utf8) oldString673));
+                } else {
+                    charSequence673 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, charSequence673);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F673': "+ unionIndex673));
+            }
+        }
+        int unionIndex674 = (decoder.readIndex());
+        if (unionIndex674 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, null);
+        } else {
+            if (unionIndex674 == 1) {
+                Utf8 charSequence674;
+                Object oldString674 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(674);
+                if (oldString674 instanceof Utf8) {
+                    charSequence674 = (decoder).readString(((Utf8) oldString674));
+                } else {
+                    charSequence674 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, charSequence674);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F674': "+ unionIndex674));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex675 = (decoder.readIndex());
+        if (unionIndex675 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, null);
+        } else {
+            if (unionIndex675 == 1) {
+                Utf8 charSequence675;
+                Object oldString675 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(675);
+                if (oldString675 instanceof Utf8) {
+                    charSequence675 = (decoder).readString(((Utf8) oldString675));
+                } else {
+                    charSequence675 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, charSequence675);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F675': "+ unionIndex675));
+            }
+        }
+        int unionIndex676 = (decoder.readIndex());
+        if (unionIndex676 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, null);
+        } else {
+            if (unionIndex676 == 1) {
+                Utf8 charSequence676;
+                Object oldString676 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(676);
+                if (oldString676 instanceof Utf8) {
+                    charSequence676 = (decoder).readString(((Utf8) oldString676));
+                } else {
+                    charSequence676 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, charSequence676);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F676': "+ unionIndex676));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex677 = (decoder.readIndex());
+        if (unionIndex677 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, null);
+        } else {
+            if (unionIndex677 == 1) {
+                Utf8 charSequence677;
+                Object oldString677 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(677);
+                if (oldString677 instanceof Utf8) {
+                    charSequence677 = (decoder).readString(((Utf8) oldString677));
+                } else {
+                    charSequence677 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, charSequence677);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F677': "+ unionIndex677));
+            }
+        }
+        int unionIndex678 = (decoder.readIndex());
+        if (unionIndex678 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, null);
+        } else {
+            if (unionIndex678 == 1) {
+                Utf8 charSequence678;
+                Object oldString678 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(678);
+                if (oldString678 instanceof Utf8) {
+                    charSequence678 = (decoder).readString(((Utf8) oldString678));
+                } else {
+                    charSequence678 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, charSequence678);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F678': "+ unionIndex678));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex679 = (decoder.readIndex());
+        if (unionIndex679 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, null);
+        } else {
+            if (unionIndex679 == 1) {
+                Utf8 charSequence679;
+                Object oldString679 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(679);
+                if (oldString679 instanceof Utf8) {
+                    charSequence679 = (decoder).readString(((Utf8) oldString679));
+                } else {
+                    charSequence679 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, charSequence679);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F679': "+ unionIndex679));
+            }
+        }
+        int unionIndex680 = (decoder.readIndex());
+        if (unionIndex680 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, null);
+        } else {
+            if (unionIndex680 == 1) {
+                Utf8 charSequence680;
+                Object oldString680 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(680);
+                if (oldString680 instanceof Utf8) {
+                    charSequence680 = (decoder).readString(((Utf8) oldString680));
+                } else {
+                    charSequence680 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, charSequence680);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F680': "+ unionIndex680));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex681 = (decoder.readIndex());
+        if (unionIndex681 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, null);
+        } else {
+            if (unionIndex681 == 1) {
+                Utf8 charSequence681;
+                Object oldString681 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(681);
+                if (oldString681 instanceof Utf8) {
+                    charSequence681 = (decoder).readString(((Utf8) oldString681));
+                } else {
+                    charSequence681 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, charSequence681);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F681': "+ unionIndex681));
+            }
+        }
+        int unionIndex682 = (decoder.readIndex());
+        if (unionIndex682 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, null);
+        } else {
+            if (unionIndex682 == 1) {
+                Utf8 charSequence682;
+                Object oldString682 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(682);
+                if (oldString682 instanceof Utf8) {
+                    charSequence682 = (decoder).readString(((Utf8) oldString682));
+                } else {
+                    charSequence682 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, charSequence682);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F682': "+ unionIndex682));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex683 = (decoder.readIndex());
+        if (unionIndex683 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, null);
+        } else {
+            if (unionIndex683 == 1) {
+                Utf8 charSequence683;
+                Object oldString683 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(683);
+                if (oldString683 instanceof Utf8) {
+                    charSequence683 = (decoder).readString(((Utf8) oldString683));
+                } else {
+                    charSequence683 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, charSequence683);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F683': "+ unionIndex683));
+            }
+        }
+        int unionIndex684 = (decoder.readIndex());
+        if (unionIndex684 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, null);
+        } else {
+            if (unionIndex684 == 1) {
+                Utf8 charSequence684;
+                Object oldString684 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(684);
+                if (oldString684 instanceof Utf8) {
+                    charSequence684 = (decoder).readString(((Utf8) oldString684));
+                } else {
+                    charSequence684 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, charSequence684);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F684': "+ unionIndex684));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex685 = (decoder.readIndex());
+        if (unionIndex685 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, null);
+        } else {
+            if (unionIndex685 == 1) {
+                Utf8 charSequence685;
+                Object oldString685 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(685);
+                if (oldString685 instanceof Utf8) {
+                    charSequence685 = (decoder).readString(((Utf8) oldString685));
+                } else {
+                    charSequence685 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, charSequence685);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F685': "+ unionIndex685));
+            }
+        }
+        int unionIndex686 = (decoder.readIndex());
+        if (unionIndex686 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, null);
+        } else {
+            if (unionIndex686 == 1) {
+                Utf8 charSequence686;
+                Object oldString686 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(686);
+                if (oldString686 instanceof Utf8) {
+                    charSequence686 = (decoder).readString(((Utf8) oldString686));
+                } else {
+                    charSequence686 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, charSequence686);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F686': "+ unionIndex686));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex687 = (decoder.readIndex());
+        if (unionIndex687 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, null);
+        } else {
+            if (unionIndex687 == 1) {
+                Utf8 charSequence687;
+                Object oldString687 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(687);
+                if (oldString687 instanceof Utf8) {
+                    charSequence687 = (decoder).readString(((Utf8) oldString687));
+                } else {
+                    charSequence687 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, charSequence687);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F687': "+ unionIndex687));
+            }
+        }
+        int unionIndex688 = (decoder.readIndex());
+        if (unionIndex688 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, null);
+        } else {
+            if (unionIndex688 == 1) {
+                Utf8 charSequence688;
+                Object oldString688 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(688);
+                if (oldString688 instanceof Utf8) {
+                    charSequence688 = (decoder).readString(((Utf8) oldString688));
+                } else {
+                    charSequence688 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, charSequence688);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F688': "+ unionIndex688));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex689 = (decoder.readIndex());
+        if (unionIndex689 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, null);
+        } else {
+            if (unionIndex689 == 1) {
+                Utf8 charSequence689;
+                Object oldString689 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(689);
+                if (oldString689 instanceof Utf8) {
+                    charSequence689 = (decoder).readString(((Utf8) oldString689));
+                } else {
+                    charSequence689 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, charSequence689);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F689': "+ unionIndex689));
+            }
+        }
+        int unionIndex690 = (decoder.readIndex());
+        if (unionIndex690 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, null);
+        } else {
+            if (unionIndex690 == 1) {
+                Utf8 charSequence690;
+                Object oldString690 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(690);
+                if (oldString690 instanceof Utf8) {
+                    charSequence690 = (decoder).readString(((Utf8) oldString690));
+                } else {
+                    charSequence690 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, charSequence690);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F690': "+ unionIndex690));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex691 = (decoder.readIndex());
+        if (unionIndex691 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, null);
+        } else {
+            if (unionIndex691 == 1) {
+                Utf8 charSequence691;
+                Object oldString691 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(691);
+                if (oldString691 instanceof Utf8) {
+                    charSequence691 = (decoder).readString(((Utf8) oldString691));
+                } else {
+                    charSequence691 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, charSequence691);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F691': "+ unionIndex691));
+            }
+        }
+        int unionIndex692 = (decoder.readIndex());
+        if (unionIndex692 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, null);
+        } else {
+            if (unionIndex692 == 1) {
+                Utf8 charSequence692;
+                Object oldString692 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(692);
+                if (oldString692 instanceof Utf8) {
+                    charSequence692 = (decoder).readString(((Utf8) oldString692));
+                } else {
+                    charSequence692 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, charSequence692);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F692': "+ unionIndex692));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex693 = (decoder.readIndex());
+        if (unionIndex693 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, null);
+        } else {
+            if (unionIndex693 == 1) {
+                Utf8 charSequence693;
+                Object oldString693 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(693);
+                if (oldString693 instanceof Utf8) {
+                    charSequence693 = (decoder).readString(((Utf8) oldString693));
+                } else {
+                    charSequence693 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, charSequence693);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F693': "+ unionIndex693));
+            }
+        }
+        int unionIndex694 = (decoder.readIndex());
+        if (unionIndex694 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, null);
+        } else {
+            if (unionIndex694 == 1) {
+                Utf8 charSequence694;
+                Object oldString694 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(694);
+                if (oldString694 instanceof Utf8) {
+                    charSequence694 = (decoder).readString(((Utf8) oldString694));
+                } else {
+                    charSequence694 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, charSequence694);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F694': "+ unionIndex694));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex695 = (decoder.readIndex());
+        if (unionIndex695 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, null);
+        } else {
+            if (unionIndex695 == 1) {
+                Utf8 charSequence695;
+                Object oldString695 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(695);
+                if (oldString695 instanceof Utf8) {
+                    charSequence695 = (decoder).readString(((Utf8) oldString695));
+                } else {
+                    charSequence695 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, charSequence695);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F695': "+ unionIndex695));
+            }
+        }
+        int unionIndex696 = (decoder.readIndex());
+        if (unionIndex696 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, null);
+        } else {
+            if (unionIndex696 == 1) {
+                Utf8 charSequence696;
+                Object oldString696 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(696);
+                if (oldString696 instanceof Utf8) {
+                    charSequence696 = (decoder).readString(((Utf8) oldString696));
+                } else {
+                    charSequence696 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, charSequence696);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F696': "+ unionIndex696));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex697 = (decoder.readIndex());
+        if (unionIndex697 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, null);
+        } else {
+            if (unionIndex697 == 1) {
+                Utf8 charSequence697;
+                Object oldString697 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(697);
+                if (oldString697 instanceof Utf8) {
+                    charSequence697 = (decoder).readString(((Utf8) oldString697));
+                } else {
+                    charSequence697 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, charSequence697);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F697': "+ unionIndex697));
+            }
+        }
+        int unionIndex698 = (decoder.readIndex());
+        if (unionIndex698 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, null);
+        } else {
+            if (unionIndex698 == 1) {
+                Utf8 charSequence698;
+                Object oldString698 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(698);
+                if (oldString698 instanceof Utf8) {
+                    charSequence698 = (decoder).readString(((Utf8) oldString698));
+                } else {
+                    charSequence698 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, charSequence698);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F698': "+ unionIndex698));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex699 = (decoder.readIndex());
+        if (unionIndex699 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, null);
+        } else {
+            if (unionIndex699 == 1) {
+                Utf8 charSequence699;
+                Object oldString699 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(699);
+                if (oldString699 instanceof Utf8) {
+                    charSequence699 = (decoder).readString(((Utf8) oldString699));
+                } else {
+                    charSequence699 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, charSequence699);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F699': "+ unionIndex699));
+            }
+        }
+        int unionIndex700 = (decoder.readIndex());
+        if (unionIndex700 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, null);
+        } else {
+            if (unionIndex700 == 1) {
+                Utf8 charSequence700;
+                Object oldString700 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(700);
+                if (oldString700 instanceof Utf8) {
+                    charSequence700 = (decoder).readString(((Utf8) oldString700));
+                } else {
+                    charSequence700 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, charSequence700);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F700': "+ unionIndex700));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex701 = (decoder.readIndex());
+        if (unionIndex701 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, null);
+        } else {
+            if (unionIndex701 == 1) {
+                Utf8 charSequence701;
+                Object oldString701 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(701);
+                if (oldString701 instanceof Utf8) {
+                    charSequence701 = (decoder).readString(((Utf8) oldString701));
+                } else {
+                    charSequence701 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, charSequence701);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F701': "+ unionIndex701));
+            }
+        }
+        int unionIndex702 = (decoder.readIndex());
+        if (unionIndex702 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, null);
+        } else {
+            if (unionIndex702 == 1) {
+                Utf8 charSequence702;
+                Object oldString702 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(702);
+                if (oldString702 instanceof Utf8) {
+                    charSequence702 = (decoder).readString(((Utf8) oldString702));
+                } else {
+                    charSequence702 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, charSequence702);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F702': "+ unionIndex702));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex703 = (decoder.readIndex());
+        if (unionIndex703 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, null);
+        } else {
+            if (unionIndex703 == 1) {
+                Utf8 charSequence703;
+                Object oldString703 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(703);
+                if (oldString703 instanceof Utf8) {
+                    charSequence703 = (decoder).readString(((Utf8) oldString703));
+                } else {
+                    charSequence703 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, charSequence703);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F703': "+ unionIndex703));
+            }
+        }
+        int unionIndex704 = (decoder.readIndex());
+        if (unionIndex704 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, null);
+        } else {
+            if (unionIndex704 == 1) {
+                Utf8 charSequence704;
+                Object oldString704 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(704);
+                if (oldString704 instanceof Utf8) {
+                    charSequence704 = (decoder).readString(((Utf8) oldString704));
+                } else {
+                    charSequence704 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, charSequence704);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F704': "+ unionIndex704));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex705 = (decoder.readIndex());
+        if (unionIndex705 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, null);
+        } else {
+            if (unionIndex705 == 1) {
+                Utf8 charSequence705;
+                Object oldString705 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(705);
+                if (oldString705 instanceof Utf8) {
+                    charSequence705 = (decoder).readString(((Utf8) oldString705));
+                } else {
+                    charSequence705 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, charSequence705);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F705': "+ unionIndex705));
+            }
+        }
+        int unionIndex706 = (decoder.readIndex());
+        if (unionIndex706 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, null);
+        } else {
+            if (unionIndex706 == 1) {
+                Utf8 charSequence706;
+                Object oldString706 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(706);
+                if (oldString706 instanceof Utf8) {
+                    charSequence706 = (decoder).readString(((Utf8) oldString706));
+                } else {
+                    charSequence706 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, charSequence706);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F706': "+ unionIndex706));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex707 = (decoder.readIndex());
+        if (unionIndex707 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, null);
+        } else {
+            if (unionIndex707 == 1) {
+                Utf8 charSequence707;
+                Object oldString707 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(707);
+                if (oldString707 instanceof Utf8) {
+                    charSequence707 = (decoder).readString(((Utf8) oldString707));
+                } else {
+                    charSequence707 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, charSequence707);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F707': "+ unionIndex707));
+            }
+        }
+        int unionIndex708 = (decoder.readIndex());
+        if (unionIndex708 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, null);
+        } else {
+            if (unionIndex708 == 1) {
+                Utf8 charSequence708;
+                Object oldString708 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(708);
+                if (oldString708 instanceof Utf8) {
+                    charSequence708 = (decoder).readString(((Utf8) oldString708));
+                } else {
+                    charSequence708 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, charSequence708);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F708': "+ unionIndex708));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex709 = (decoder.readIndex());
+        if (unionIndex709 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, null);
+        } else {
+            if (unionIndex709 == 1) {
+                Utf8 charSequence709;
+                Object oldString709 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(709);
+                if (oldString709 instanceof Utf8) {
+                    charSequence709 = (decoder).readString(((Utf8) oldString709));
+                } else {
+                    charSequence709 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, charSequence709);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F709': "+ unionIndex709));
+            }
+        }
+        int unionIndex710 = (decoder.readIndex());
+        if (unionIndex710 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, null);
+        } else {
+            if (unionIndex710 == 1) {
+                Utf8 charSequence710;
+                Object oldString710 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(710);
+                if (oldString710 instanceof Utf8) {
+                    charSequence710 = (decoder).readString(((Utf8) oldString710));
+                } else {
+                    charSequence710 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, charSequence710);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F710': "+ unionIndex710));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex711 = (decoder.readIndex());
+        if (unionIndex711 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, null);
+        } else {
+            if (unionIndex711 == 1) {
+                Utf8 charSequence711;
+                Object oldString711 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(711);
+                if (oldString711 instanceof Utf8) {
+                    charSequence711 = (decoder).readString(((Utf8) oldString711));
+                } else {
+                    charSequence711 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, charSequence711);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F711': "+ unionIndex711));
+            }
+        }
+        int unionIndex712 = (decoder.readIndex());
+        if (unionIndex712 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, null);
+        } else {
+            if (unionIndex712 == 1) {
+                Utf8 charSequence712;
+                Object oldString712 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(712);
+                if (oldString712 instanceof Utf8) {
+                    charSequence712 = (decoder).readString(((Utf8) oldString712));
+                } else {
+                    charSequence712 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, charSequence712);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F712': "+ unionIndex712));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex713 = (decoder.readIndex());
+        if (unionIndex713 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, null);
+        } else {
+            if (unionIndex713 == 1) {
+                Utf8 charSequence713;
+                Object oldString713 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(713);
+                if (oldString713 instanceof Utf8) {
+                    charSequence713 = (decoder).readString(((Utf8) oldString713));
+                } else {
+                    charSequence713 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, charSequence713);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F713': "+ unionIndex713));
+            }
+        }
+        int unionIndex714 = (decoder.readIndex());
+        if (unionIndex714 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, null);
+        } else {
+            if (unionIndex714 == 1) {
+                Utf8 charSequence714;
+                Object oldString714 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(714);
+                if (oldString714 instanceof Utf8) {
+                    charSequence714 = (decoder).readString(((Utf8) oldString714));
+                } else {
+                    charSequence714 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, charSequence714);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F714': "+ unionIndex714));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex715 = (decoder.readIndex());
+        if (unionIndex715 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, null);
+        } else {
+            if (unionIndex715 == 1) {
+                Utf8 charSequence715;
+                Object oldString715 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(715);
+                if (oldString715 instanceof Utf8) {
+                    charSequence715 = (decoder).readString(((Utf8) oldString715));
+                } else {
+                    charSequence715 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, charSequence715);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F715': "+ unionIndex715));
+            }
+        }
+        int unionIndex716 = (decoder.readIndex());
+        if (unionIndex716 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, null);
+        } else {
+            if (unionIndex716 == 1) {
+                Utf8 charSequence716;
+                Object oldString716 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(716);
+                if (oldString716 instanceof Utf8) {
+                    charSequence716 = (decoder).readString(((Utf8) oldString716));
+                } else {
+                    charSequence716 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, charSequence716);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F716': "+ unionIndex716));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex717 = (decoder.readIndex());
+        if (unionIndex717 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, null);
+        } else {
+            if (unionIndex717 == 1) {
+                Utf8 charSequence717;
+                Object oldString717 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(717);
+                if (oldString717 instanceof Utf8) {
+                    charSequence717 = (decoder).readString(((Utf8) oldString717));
+                } else {
+                    charSequence717 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, charSequence717);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F717': "+ unionIndex717));
+            }
+        }
+        int unionIndex718 = (decoder.readIndex());
+        if (unionIndex718 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, null);
+        } else {
+            if (unionIndex718 == 1) {
+                Utf8 charSequence718;
+                Object oldString718 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(718);
+                if (oldString718 instanceof Utf8) {
+                    charSequence718 = (decoder).readString(((Utf8) oldString718));
+                } else {
+                    charSequence718 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, charSequence718);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F718': "+ unionIndex718));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex719 = (decoder.readIndex());
+        if (unionIndex719 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, null);
+        } else {
+            if (unionIndex719 == 1) {
+                Utf8 charSequence719;
+                Object oldString719 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(719);
+                if (oldString719 instanceof Utf8) {
+                    charSequence719 = (decoder).readString(((Utf8) oldString719));
+                } else {
+                    charSequence719 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, charSequence719);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F719': "+ unionIndex719));
+            }
+        }
+        int unionIndex720 = (decoder.readIndex());
+        if (unionIndex720 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, null);
+        } else {
+            if (unionIndex720 == 1) {
+                Utf8 charSequence720;
+                Object oldString720 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(720);
+                if (oldString720 instanceof Utf8) {
+                    charSequence720 = (decoder).readString(((Utf8) oldString720));
+                } else {
+                    charSequence720 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, charSequence720);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F720': "+ unionIndex720));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex721 = (decoder.readIndex());
+        if (unionIndex721 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, null);
+        } else {
+            if (unionIndex721 == 1) {
+                Utf8 charSequence721;
+                Object oldString721 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(721);
+                if (oldString721 instanceof Utf8) {
+                    charSequence721 = (decoder).readString(((Utf8) oldString721));
+                } else {
+                    charSequence721 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, charSequence721);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F721': "+ unionIndex721));
+            }
+        }
+        int unionIndex722 = (decoder.readIndex());
+        if (unionIndex722 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, null);
+        } else {
+            if (unionIndex722 == 1) {
+                Utf8 charSequence722;
+                Object oldString722 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(722);
+                if (oldString722 instanceof Utf8) {
+                    charSequence722 = (decoder).readString(((Utf8) oldString722));
+                } else {
+                    charSequence722 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, charSequence722);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F722': "+ unionIndex722));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex723 = (decoder.readIndex());
+        if (unionIndex723 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, null);
+        } else {
+            if (unionIndex723 == 1) {
+                Utf8 charSequence723;
+                Object oldString723 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(723);
+                if (oldString723 instanceof Utf8) {
+                    charSequence723 = (decoder).readString(((Utf8) oldString723));
+                } else {
+                    charSequence723 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, charSequence723);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F723': "+ unionIndex723));
+            }
+        }
+        int unionIndex724 = (decoder.readIndex());
+        if (unionIndex724 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, null);
+        } else {
+            if (unionIndex724 == 1) {
+                Utf8 charSequence724;
+                Object oldString724 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(724);
+                if (oldString724 instanceof Utf8) {
+                    charSequence724 = (decoder).readString(((Utf8) oldString724));
+                } else {
+                    charSequence724 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, charSequence724);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F724': "+ unionIndex724));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex725 = (decoder.readIndex());
+        if (unionIndex725 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, null);
+        } else {
+            if (unionIndex725 == 1) {
+                Utf8 charSequence725;
+                Object oldString725 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(725);
+                if (oldString725 instanceof Utf8) {
+                    charSequence725 = (decoder).readString(((Utf8) oldString725));
+                } else {
+                    charSequence725 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, charSequence725);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F725': "+ unionIndex725));
+            }
+        }
+        int unionIndex726 = (decoder.readIndex());
+        if (unionIndex726 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, null);
+        } else {
+            if (unionIndex726 == 1) {
+                Utf8 charSequence726;
+                Object oldString726 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(726);
+                if (oldString726 instanceof Utf8) {
+                    charSequence726 = (decoder).readString(((Utf8) oldString726));
+                } else {
+                    charSequence726 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, charSequence726);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F726': "+ unionIndex726));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex727 = (decoder.readIndex());
+        if (unionIndex727 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, null);
+        } else {
+            if (unionIndex727 == 1) {
+                Utf8 charSequence727;
+                Object oldString727 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(727);
+                if (oldString727 instanceof Utf8) {
+                    charSequence727 = (decoder).readString(((Utf8) oldString727));
+                } else {
+                    charSequence727 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, charSequence727);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F727': "+ unionIndex727));
+            }
+        }
+        int unionIndex728 = (decoder.readIndex());
+        if (unionIndex728 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, null);
+        } else {
+            if (unionIndex728 == 1) {
+                Utf8 charSequence728;
+                Object oldString728 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(728);
+                if (oldString728 instanceof Utf8) {
+                    charSequence728 = (decoder).readString(((Utf8) oldString728));
+                } else {
+                    charSequence728 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, charSequence728);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F728': "+ unionIndex728));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex729 = (decoder.readIndex());
+        if (unionIndex729 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, null);
+        } else {
+            if (unionIndex729 == 1) {
+                Utf8 charSequence729;
+                Object oldString729 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(729);
+                if (oldString729 instanceof Utf8) {
+                    charSequence729 = (decoder).readString(((Utf8) oldString729));
+                } else {
+                    charSequence729 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, charSequence729);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F729': "+ unionIndex729));
+            }
+        }
+        int unionIndex730 = (decoder.readIndex());
+        if (unionIndex730 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, null);
+        } else {
+            if (unionIndex730 == 1) {
+                Utf8 charSequence730;
+                Object oldString730 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(730);
+                if (oldString730 instanceof Utf8) {
+                    charSequence730 = (decoder).readString(((Utf8) oldString730));
+                } else {
+                    charSequence730 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, charSequence730);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F730': "+ unionIndex730));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex731 = (decoder.readIndex());
+        if (unionIndex731 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, null);
+        } else {
+            if (unionIndex731 == 1) {
+                Utf8 charSequence731;
+                Object oldString731 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(731);
+                if (oldString731 instanceof Utf8) {
+                    charSequence731 = (decoder).readString(((Utf8) oldString731));
+                } else {
+                    charSequence731 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, charSequence731);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F731': "+ unionIndex731));
+            }
+        }
+        int unionIndex732 = (decoder.readIndex());
+        if (unionIndex732 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, null);
+        } else {
+            if (unionIndex732 == 1) {
+                Utf8 charSequence732;
+                Object oldString732 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(732);
+                if (oldString732 instanceof Utf8) {
+                    charSequence732 = (decoder).readString(((Utf8) oldString732));
+                } else {
+                    charSequence732 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, charSequence732);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F732': "+ unionIndex732));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex733 = (decoder.readIndex());
+        if (unionIndex733 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, null);
+        } else {
+            if (unionIndex733 == 1) {
+                Utf8 charSequence733;
+                Object oldString733 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(733);
+                if (oldString733 instanceof Utf8) {
+                    charSequence733 = (decoder).readString(((Utf8) oldString733));
+                } else {
+                    charSequence733 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, charSequence733);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F733': "+ unionIndex733));
+            }
+        }
+        int unionIndex734 = (decoder.readIndex());
+        if (unionIndex734 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, null);
+        } else {
+            if (unionIndex734 == 1) {
+                Utf8 charSequence734;
+                Object oldString734 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(734);
+                if (oldString734 instanceof Utf8) {
+                    charSequence734 = (decoder).readString(((Utf8) oldString734));
+                } else {
+                    charSequence734 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, charSequence734);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F734': "+ unionIndex734));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex735 = (decoder.readIndex());
+        if (unionIndex735 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, null);
+        } else {
+            if (unionIndex735 == 1) {
+                Utf8 charSequence735;
+                Object oldString735 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(735);
+                if (oldString735 instanceof Utf8) {
+                    charSequence735 = (decoder).readString(((Utf8) oldString735));
+                } else {
+                    charSequence735 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, charSequence735);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F735': "+ unionIndex735));
+            }
+        }
+        int unionIndex736 = (decoder.readIndex());
+        if (unionIndex736 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, null);
+        } else {
+            if (unionIndex736 == 1) {
+                Utf8 charSequence736;
+                Object oldString736 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(736);
+                if (oldString736 instanceof Utf8) {
+                    charSequence736 = (decoder).readString(((Utf8) oldString736));
+                } else {
+                    charSequence736 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, charSequence736);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F736': "+ unionIndex736));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex737 = (decoder.readIndex());
+        if (unionIndex737 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, null);
+        } else {
+            if (unionIndex737 == 1) {
+                Utf8 charSequence737;
+                Object oldString737 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(737);
+                if (oldString737 instanceof Utf8) {
+                    charSequence737 = (decoder).readString(((Utf8) oldString737));
+                } else {
+                    charSequence737 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, charSequence737);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F737': "+ unionIndex737));
+            }
+        }
+        int unionIndex738 = (decoder.readIndex());
+        if (unionIndex738 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, null);
+        } else {
+            if (unionIndex738 == 1) {
+                Utf8 charSequence738;
+                Object oldString738 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(738);
+                if (oldString738 instanceof Utf8) {
+                    charSequence738 = (decoder).readString(((Utf8) oldString738));
+                } else {
+                    charSequence738 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, charSequence738);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F738': "+ unionIndex738));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex739 = (decoder.readIndex());
+        if (unionIndex739 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, null);
+        } else {
+            if (unionIndex739 == 1) {
+                Utf8 charSequence739;
+                Object oldString739 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(739);
+                if (oldString739 instanceof Utf8) {
+                    charSequence739 = (decoder).readString(((Utf8) oldString739));
+                } else {
+                    charSequence739 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, charSequence739);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F739': "+ unionIndex739));
+            }
+        }
+        int unionIndex740 = (decoder.readIndex());
+        if (unionIndex740 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, null);
+        } else {
+            if (unionIndex740 == 1) {
+                Utf8 charSequence740;
+                Object oldString740 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(740);
+                if (oldString740 instanceof Utf8) {
+                    charSequence740 = (decoder).readString(((Utf8) oldString740));
+                } else {
+                    charSequence740 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, charSequence740);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F740': "+ unionIndex740));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex741 = (decoder.readIndex());
+        if (unionIndex741 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, null);
+        } else {
+            if (unionIndex741 == 1) {
+                Utf8 charSequence741;
+                Object oldString741 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(741);
+                if (oldString741 instanceof Utf8) {
+                    charSequence741 = (decoder).readString(((Utf8) oldString741));
+                } else {
+                    charSequence741 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, charSequence741);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F741': "+ unionIndex741));
+            }
+        }
+        int unionIndex742 = (decoder.readIndex());
+        if (unionIndex742 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, null);
+        } else {
+            if (unionIndex742 == 1) {
+                Utf8 charSequence742;
+                Object oldString742 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(742);
+                if (oldString742 instanceof Utf8) {
+                    charSequence742 = (decoder).readString(((Utf8) oldString742));
+                } else {
+                    charSequence742 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, charSequence742);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F742': "+ unionIndex742));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex743 = (decoder.readIndex());
+        if (unionIndex743 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, null);
+        } else {
+            if (unionIndex743 == 1) {
+                Utf8 charSequence743;
+                Object oldString743 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(743);
+                if (oldString743 instanceof Utf8) {
+                    charSequence743 = (decoder).readString(((Utf8) oldString743));
+                } else {
+                    charSequence743 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, charSequence743);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F743': "+ unionIndex743));
+            }
+        }
+        int unionIndex744 = (decoder.readIndex());
+        if (unionIndex744 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, null);
+        } else {
+            if (unionIndex744 == 1) {
+                Utf8 charSequence744;
+                Object oldString744 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(744);
+                if (oldString744 instanceof Utf8) {
+                    charSequence744 = (decoder).readString(((Utf8) oldString744));
+                } else {
+                    charSequence744 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, charSequence744);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F744': "+ unionIndex744));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex745 = (decoder.readIndex());
+        if (unionIndex745 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, null);
+        } else {
+            if (unionIndex745 == 1) {
+                Utf8 charSequence745;
+                Object oldString745 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(745);
+                if (oldString745 instanceof Utf8) {
+                    charSequence745 = (decoder).readString(((Utf8) oldString745));
+                } else {
+                    charSequence745 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, charSequence745);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F745': "+ unionIndex745));
+            }
+        }
+        int unionIndex746 = (decoder.readIndex());
+        if (unionIndex746 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, null);
+        } else {
+            if (unionIndex746 == 1) {
+                Utf8 charSequence746;
+                Object oldString746 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(746);
+                if (oldString746 instanceof Utf8) {
+                    charSequence746 = (decoder).readString(((Utf8) oldString746));
+                } else {
+                    charSequence746 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, charSequence746);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F746': "+ unionIndex746));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex747 = (decoder.readIndex());
+        if (unionIndex747 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, null);
+        } else {
+            if (unionIndex747 == 1) {
+                Utf8 charSequence747;
+                Object oldString747 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(747);
+                if (oldString747 instanceof Utf8) {
+                    charSequence747 = (decoder).readString(((Utf8) oldString747));
+                } else {
+                    charSequence747 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, charSequence747);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F747': "+ unionIndex747));
+            }
+        }
+        int unionIndex748 = (decoder.readIndex());
+        if (unionIndex748 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, null);
+        } else {
+            if (unionIndex748 == 1) {
+                Utf8 charSequence748;
+                Object oldString748 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(748);
+                if (oldString748 instanceof Utf8) {
+                    charSequence748 = (decoder).readString(((Utf8) oldString748));
+                } else {
+                    charSequence748 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, charSequence748);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F748': "+ unionIndex748));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex749 = (decoder.readIndex());
+        if (unionIndex749 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, null);
+        } else {
+            if (unionIndex749 == 1) {
+                Utf8 charSequence749;
+                Object oldString749 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(749);
+                if (oldString749 instanceof Utf8) {
+                    charSequence749 = (decoder).readString(((Utf8) oldString749));
+                } else {
+                    charSequence749 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, charSequence749);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F749': "+ unionIndex749));
+            }
+        }
+        int unionIndex750 = (decoder.readIndex());
+        if (unionIndex750 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, null);
+        } else {
+            if (unionIndex750 == 1) {
+                Utf8 charSequence750;
+                Object oldString750 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(750);
+                if (oldString750 instanceof Utf8) {
+                    charSequence750 = (decoder).readString(((Utf8) oldString750));
+                } else {
+                    charSequence750 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, charSequence750);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F750': "+ unionIndex750));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex751 = (decoder.readIndex());
+        if (unionIndex751 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, null);
+        } else {
+            if (unionIndex751 == 1) {
+                Utf8 charSequence751;
+                Object oldString751 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(751);
+                if (oldString751 instanceof Utf8) {
+                    charSequence751 = (decoder).readString(((Utf8) oldString751));
+                } else {
+                    charSequence751 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, charSequence751);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F751': "+ unionIndex751));
+            }
+        }
+        int unionIndex752 = (decoder.readIndex());
+        if (unionIndex752 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, null);
+        } else {
+            if (unionIndex752 == 1) {
+                Utf8 charSequence752;
+                Object oldString752 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(752);
+                if (oldString752 instanceof Utf8) {
+                    charSequence752 = (decoder).readString(((Utf8) oldString752));
+                } else {
+                    charSequence752 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, charSequence752);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F752': "+ unionIndex752));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex753 = (decoder.readIndex());
+        if (unionIndex753 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, null);
+        } else {
+            if (unionIndex753 == 1) {
+                Utf8 charSequence753;
+                Object oldString753 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(753);
+                if (oldString753 instanceof Utf8) {
+                    charSequence753 = (decoder).readString(((Utf8) oldString753));
+                } else {
+                    charSequence753 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, charSequence753);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F753': "+ unionIndex753));
+            }
+        }
+        int unionIndex754 = (decoder.readIndex());
+        if (unionIndex754 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, null);
+        } else {
+            if (unionIndex754 == 1) {
+                Utf8 charSequence754;
+                Object oldString754 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(754);
+                if (oldString754 instanceof Utf8) {
+                    charSequence754 = (decoder).readString(((Utf8) oldString754));
+                } else {
+                    charSequence754 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, charSequence754);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F754': "+ unionIndex754));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex755 = (decoder.readIndex());
+        if (unionIndex755 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, null);
+        } else {
+            if (unionIndex755 == 1) {
+                Utf8 charSequence755;
+                Object oldString755 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(755);
+                if (oldString755 instanceof Utf8) {
+                    charSequence755 = (decoder).readString(((Utf8) oldString755));
+                } else {
+                    charSequence755 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, charSequence755);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F755': "+ unionIndex755));
+            }
+        }
+        int unionIndex756 = (decoder.readIndex());
+        if (unionIndex756 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, null);
+        } else {
+            if (unionIndex756 == 1) {
+                Utf8 charSequence756;
+                Object oldString756 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(756);
+                if (oldString756 instanceof Utf8) {
+                    charSequence756 = (decoder).readString(((Utf8) oldString756));
+                } else {
+                    charSequence756 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, charSequence756);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F756': "+ unionIndex756));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex757 = (decoder.readIndex());
+        if (unionIndex757 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, null);
+        } else {
+            if (unionIndex757 == 1) {
+                Utf8 charSequence757;
+                Object oldString757 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(757);
+                if (oldString757 instanceof Utf8) {
+                    charSequence757 = (decoder).readString(((Utf8) oldString757));
+                } else {
+                    charSequence757 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, charSequence757);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F757': "+ unionIndex757));
+            }
+        }
+        int unionIndex758 = (decoder.readIndex());
+        if (unionIndex758 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, null);
+        } else {
+            if (unionIndex758 == 1) {
+                Utf8 charSequence758;
+                Object oldString758 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(758);
+                if (oldString758 instanceof Utf8) {
+                    charSequence758 = (decoder).readString(((Utf8) oldString758));
+                } else {
+                    charSequence758 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, charSequence758);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F758': "+ unionIndex758));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex759 = (decoder.readIndex());
+        if (unionIndex759 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, null);
+        } else {
+            if (unionIndex759 == 1) {
+                Utf8 charSequence759;
+                Object oldString759 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(759);
+                if (oldString759 instanceof Utf8) {
+                    charSequence759 = (decoder).readString(((Utf8) oldString759));
+                } else {
+                    charSequence759 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, charSequence759);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F759': "+ unionIndex759));
+            }
+        }
+        int unionIndex760 = (decoder.readIndex());
+        if (unionIndex760 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, null);
+        } else {
+            if (unionIndex760 == 1) {
+                Utf8 charSequence760;
+                Object oldString760 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(760);
+                if (oldString760 instanceof Utf8) {
+                    charSequence760 = (decoder).readString(((Utf8) oldString760));
+                } else {
+                    charSequence760 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, charSequence760);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F760': "+ unionIndex760));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex761 = (decoder.readIndex());
+        if (unionIndex761 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, null);
+        } else {
+            if (unionIndex761 == 1) {
+                Utf8 charSequence761;
+                Object oldString761 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(761);
+                if (oldString761 instanceof Utf8) {
+                    charSequence761 = (decoder).readString(((Utf8) oldString761));
+                } else {
+                    charSequence761 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, charSequence761);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F761': "+ unionIndex761));
+            }
+        }
+        int unionIndex762 = (decoder.readIndex());
+        if (unionIndex762 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, null);
+        } else {
+            if (unionIndex762 == 1) {
+                Utf8 charSequence762;
+                Object oldString762 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(762);
+                if (oldString762 instanceof Utf8) {
+                    charSequence762 = (decoder).readString(((Utf8) oldString762));
+                } else {
+                    charSequence762 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, charSequence762);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F762': "+ unionIndex762));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex763 = (decoder.readIndex());
+        if (unionIndex763 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, null);
+        } else {
+            if (unionIndex763 == 1) {
+                Utf8 charSequence763;
+                Object oldString763 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(763);
+                if (oldString763 instanceof Utf8) {
+                    charSequence763 = (decoder).readString(((Utf8) oldString763));
+                } else {
+                    charSequence763 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, charSequence763);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F763': "+ unionIndex763));
+            }
+        }
+        int unionIndex764 = (decoder.readIndex());
+        if (unionIndex764 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, null);
+        } else {
+            if (unionIndex764 == 1) {
+                Utf8 charSequence764;
+                Object oldString764 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(764);
+                if (oldString764 instanceof Utf8) {
+                    charSequence764 = (decoder).readString(((Utf8) oldString764));
+                } else {
+                    charSequence764 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, charSequence764);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F764': "+ unionIndex764));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex765 = (decoder.readIndex());
+        if (unionIndex765 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, null);
+        } else {
+            if (unionIndex765 == 1) {
+                Utf8 charSequence765;
+                Object oldString765 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(765);
+                if (oldString765 instanceof Utf8) {
+                    charSequence765 = (decoder).readString(((Utf8) oldString765));
+                } else {
+                    charSequence765 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, charSequence765);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F765': "+ unionIndex765));
+            }
+        }
+        int unionIndex766 = (decoder.readIndex());
+        if (unionIndex766 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, null);
+        } else {
+            if (unionIndex766 == 1) {
+                Utf8 charSequence766;
+                Object oldString766 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(766);
+                if (oldString766 instanceof Utf8) {
+                    charSequence766 = (decoder).readString(((Utf8) oldString766));
+                } else {
+                    charSequence766 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, charSequence766);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F766': "+ unionIndex766));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex767 = (decoder.readIndex());
+        if (unionIndex767 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, null);
+        } else {
+            if (unionIndex767 == 1) {
+                Utf8 charSequence767;
+                Object oldString767 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(767);
+                if (oldString767 instanceof Utf8) {
+                    charSequence767 = (decoder).readString(((Utf8) oldString767));
+                } else {
+                    charSequence767 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, charSequence767);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F767': "+ unionIndex767));
+            }
+        }
+        int unionIndex768 = (decoder.readIndex());
+        if (unionIndex768 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, null);
+        } else {
+            if (unionIndex768 == 1) {
+                Utf8 charSequence768;
+                Object oldString768 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(768);
+                if (oldString768 instanceof Utf8) {
+                    charSequence768 = (decoder).readString(((Utf8) oldString768));
+                } else {
+                    charSequence768 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, charSequence768);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F768': "+ unionIndex768));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex769 = (decoder.readIndex());
+        if (unionIndex769 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, null);
+        } else {
+            if (unionIndex769 == 1) {
+                Utf8 charSequence769;
+                Object oldString769 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(769);
+                if (oldString769 instanceof Utf8) {
+                    charSequence769 = (decoder).readString(((Utf8) oldString769));
+                } else {
+                    charSequence769 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, charSequence769);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F769': "+ unionIndex769));
+            }
+        }
+        int unionIndex770 = (decoder.readIndex());
+        if (unionIndex770 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, null);
+        } else {
+            if (unionIndex770 == 1) {
+                Utf8 charSequence770;
+                Object oldString770 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(770);
+                if (oldString770 instanceof Utf8) {
+                    charSequence770 = (decoder).readString(((Utf8) oldString770));
+                } else {
+                    charSequence770 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, charSequence770);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F770': "+ unionIndex770));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex771 = (decoder.readIndex());
+        if (unionIndex771 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, null);
+        } else {
+            if (unionIndex771 == 1) {
+                Utf8 charSequence771;
+                Object oldString771 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(771);
+                if (oldString771 instanceof Utf8) {
+                    charSequence771 = (decoder).readString(((Utf8) oldString771));
+                } else {
+                    charSequence771 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, charSequence771);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F771': "+ unionIndex771));
+            }
+        }
+        int unionIndex772 = (decoder.readIndex());
+        if (unionIndex772 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, null);
+        } else {
+            if (unionIndex772 == 1) {
+                Utf8 charSequence772;
+                Object oldString772 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(772);
+                if (oldString772 instanceof Utf8) {
+                    charSequence772 = (decoder).readString(((Utf8) oldString772));
+                } else {
+                    charSequence772 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, charSequence772);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F772': "+ unionIndex772));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex773 = (decoder.readIndex());
+        if (unionIndex773 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, null);
+        } else {
+            if (unionIndex773 == 1) {
+                Utf8 charSequence773;
+                Object oldString773 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(773);
+                if (oldString773 instanceof Utf8) {
+                    charSequence773 = (decoder).readString(((Utf8) oldString773));
+                } else {
+                    charSequence773 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, charSequence773);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F773': "+ unionIndex773));
+            }
+        }
+        int unionIndex774 = (decoder.readIndex());
+        if (unionIndex774 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, null);
+        } else {
+            if (unionIndex774 == 1) {
+                Utf8 charSequence774;
+                Object oldString774 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(774);
+                if (oldString774 instanceof Utf8) {
+                    charSequence774 = (decoder).readString(((Utf8) oldString774));
+                } else {
+                    charSequence774 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, charSequence774);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F774': "+ unionIndex774));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex775 = (decoder.readIndex());
+        if (unionIndex775 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, null);
+        } else {
+            if (unionIndex775 == 1) {
+                Utf8 charSequence775;
+                Object oldString775 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(775);
+                if (oldString775 instanceof Utf8) {
+                    charSequence775 = (decoder).readString(((Utf8) oldString775));
+                } else {
+                    charSequence775 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, charSequence775);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F775': "+ unionIndex775));
+            }
+        }
+        int unionIndex776 = (decoder.readIndex());
+        if (unionIndex776 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, null);
+        } else {
+            if (unionIndex776 == 1) {
+                Utf8 charSequence776;
+                Object oldString776 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(776);
+                if (oldString776 instanceof Utf8) {
+                    charSequence776 = (decoder).readString(((Utf8) oldString776));
+                } else {
+                    charSequence776 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, charSequence776);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F776': "+ unionIndex776));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex777 = (decoder.readIndex());
+        if (unionIndex777 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, null);
+        } else {
+            if (unionIndex777 == 1) {
+                Utf8 charSequence777;
+                Object oldString777 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(777);
+                if (oldString777 instanceof Utf8) {
+                    charSequence777 = (decoder).readString(((Utf8) oldString777));
+                } else {
+                    charSequence777 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, charSequence777);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F777': "+ unionIndex777));
+            }
+        }
+        int unionIndex778 = (decoder.readIndex());
+        if (unionIndex778 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, null);
+        } else {
+            if (unionIndex778 == 1) {
+                Utf8 charSequence778;
+                Object oldString778 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(778);
+                if (oldString778 instanceof Utf8) {
+                    charSequence778 = (decoder).readString(((Utf8) oldString778));
+                } else {
+                    charSequence778 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, charSequence778);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F778': "+ unionIndex778));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex779 = (decoder.readIndex());
+        if (unionIndex779 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, null);
+        } else {
+            if (unionIndex779 == 1) {
+                Utf8 charSequence779;
+                Object oldString779 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(779);
+                if (oldString779 instanceof Utf8) {
+                    charSequence779 = (decoder).readString(((Utf8) oldString779));
+                } else {
+                    charSequence779 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, charSequence779);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F779': "+ unionIndex779));
+            }
+        }
+        int unionIndex780 = (decoder.readIndex());
+        if (unionIndex780 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, null);
+        } else {
+            if (unionIndex780 == 1) {
+                Utf8 charSequence780;
+                Object oldString780 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(780);
+                if (oldString780 instanceof Utf8) {
+                    charSequence780 = (decoder).readString(((Utf8) oldString780));
+                } else {
+                    charSequence780 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, charSequence780);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F780': "+ unionIndex780));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex781 = (decoder.readIndex());
+        if (unionIndex781 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, null);
+        } else {
+            if (unionIndex781 == 1) {
+                Utf8 charSequence781;
+                Object oldString781 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(781);
+                if (oldString781 instanceof Utf8) {
+                    charSequence781 = (decoder).readString(((Utf8) oldString781));
+                } else {
+                    charSequence781 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, charSequence781);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F781': "+ unionIndex781));
+            }
+        }
+        int unionIndex782 = (decoder.readIndex());
+        if (unionIndex782 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, null);
+        } else {
+            if (unionIndex782 == 1) {
+                Utf8 charSequence782;
+                Object oldString782 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(782);
+                if (oldString782 instanceof Utf8) {
+                    charSequence782 = (decoder).readString(((Utf8) oldString782));
+                } else {
+                    charSequence782 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, charSequence782);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F782': "+ unionIndex782));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex783 = (decoder.readIndex());
+        if (unionIndex783 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, null);
+        } else {
+            if (unionIndex783 == 1) {
+                Utf8 charSequence783;
+                Object oldString783 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(783);
+                if (oldString783 instanceof Utf8) {
+                    charSequence783 = (decoder).readString(((Utf8) oldString783));
+                } else {
+                    charSequence783 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, charSequence783);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F783': "+ unionIndex783));
+            }
+        }
+        int unionIndex784 = (decoder.readIndex());
+        if (unionIndex784 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, null);
+        } else {
+            if (unionIndex784 == 1) {
+                Utf8 charSequence784;
+                Object oldString784 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(784);
+                if (oldString784 instanceof Utf8) {
+                    charSequence784 = (decoder).readString(((Utf8) oldString784));
+                } else {
+                    charSequence784 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, charSequence784);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F784': "+ unionIndex784));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex785 = (decoder.readIndex());
+        if (unionIndex785 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, null);
+        } else {
+            if (unionIndex785 == 1) {
+                Utf8 charSequence785;
+                Object oldString785 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(785);
+                if (oldString785 instanceof Utf8) {
+                    charSequence785 = (decoder).readString(((Utf8) oldString785));
+                } else {
+                    charSequence785 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, charSequence785);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F785': "+ unionIndex785));
+            }
+        }
+        int unionIndex786 = (decoder.readIndex());
+        if (unionIndex786 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, null);
+        } else {
+            if (unionIndex786 == 1) {
+                Utf8 charSequence786;
+                Object oldString786 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(786);
+                if (oldString786 instanceof Utf8) {
+                    charSequence786 = (decoder).readString(((Utf8) oldString786));
+                } else {
+                    charSequence786 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, charSequence786);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F786': "+ unionIndex786));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex787 = (decoder.readIndex());
+        if (unionIndex787 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, null);
+        } else {
+            if (unionIndex787 == 1) {
+                Utf8 charSequence787;
+                Object oldString787 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(787);
+                if (oldString787 instanceof Utf8) {
+                    charSequence787 = (decoder).readString(((Utf8) oldString787));
+                } else {
+                    charSequence787 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, charSequence787);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F787': "+ unionIndex787));
+            }
+        }
+        int unionIndex788 = (decoder.readIndex());
+        if (unionIndex788 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, null);
+        } else {
+            if (unionIndex788 == 1) {
+                Utf8 charSequence788;
+                Object oldString788 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(788);
+                if (oldString788 instanceof Utf8) {
+                    charSequence788 = (decoder).readString(((Utf8) oldString788));
+                } else {
+                    charSequence788 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, charSequence788);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F788': "+ unionIndex788));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex789 = (decoder.readIndex());
+        if (unionIndex789 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, null);
+        } else {
+            if (unionIndex789 == 1) {
+                Utf8 charSequence789;
+                Object oldString789 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(789);
+                if (oldString789 instanceof Utf8) {
+                    charSequence789 = (decoder).readString(((Utf8) oldString789));
+                } else {
+                    charSequence789 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, charSequence789);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F789': "+ unionIndex789));
+            }
+        }
+        int unionIndex790 = (decoder.readIndex());
+        if (unionIndex790 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, null);
+        } else {
+            if (unionIndex790 == 1) {
+                Utf8 charSequence790;
+                Object oldString790 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(790);
+                if (oldString790 instanceof Utf8) {
+                    charSequence790 = (decoder).readString(((Utf8) oldString790));
+                } else {
+                    charSequence790 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, charSequence790);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F790': "+ unionIndex790));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex791 = (decoder.readIndex());
+        if (unionIndex791 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, null);
+        } else {
+            if (unionIndex791 == 1) {
+                Utf8 charSequence791;
+                Object oldString791 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(791);
+                if (oldString791 instanceof Utf8) {
+                    charSequence791 = (decoder).readString(((Utf8) oldString791));
+                } else {
+                    charSequence791 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, charSequence791);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F791': "+ unionIndex791));
+            }
+        }
+        int unionIndex792 = (decoder.readIndex());
+        if (unionIndex792 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, null);
+        } else {
+            if (unionIndex792 == 1) {
+                Utf8 charSequence792;
+                Object oldString792 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(792);
+                if (oldString792 instanceof Utf8) {
+                    charSequence792 = (decoder).readString(((Utf8) oldString792));
+                } else {
+                    charSequence792 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, charSequence792);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F792': "+ unionIndex792));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex793 = (decoder.readIndex());
+        if (unionIndex793 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, null);
+        } else {
+            if (unionIndex793 == 1) {
+                Utf8 charSequence793;
+                Object oldString793 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(793);
+                if (oldString793 instanceof Utf8) {
+                    charSequence793 = (decoder).readString(((Utf8) oldString793));
+                } else {
+                    charSequence793 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, charSequence793);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F793': "+ unionIndex793));
+            }
+        }
+        int unionIndex794 = (decoder.readIndex());
+        if (unionIndex794 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, null);
+        } else {
+            if (unionIndex794 == 1) {
+                Utf8 charSequence794;
+                Object oldString794 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(794);
+                if (oldString794 instanceof Utf8) {
+                    charSequence794 = (decoder).readString(((Utf8) oldString794));
+                } else {
+                    charSequence794 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, charSequence794);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F794': "+ unionIndex794));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex795 = (decoder.readIndex());
+        if (unionIndex795 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, null);
+        } else {
+            if (unionIndex795 == 1) {
+                Utf8 charSequence795;
+                Object oldString795 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(795);
+                if (oldString795 instanceof Utf8) {
+                    charSequence795 = (decoder).readString(((Utf8) oldString795));
+                } else {
+                    charSequence795 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, charSequence795);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F795': "+ unionIndex795));
+            }
+        }
+        int unionIndex796 = (decoder.readIndex());
+        if (unionIndex796 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, null);
+        } else {
+            if (unionIndex796 == 1) {
+                Utf8 charSequence796;
+                Object oldString796 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(796);
+                if (oldString796 instanceof Utf8) {
+                    charSequence796 = (decoder).readString(((Utf8) oldString796));
+                } else {
+                    charSequence796 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, charSequence796);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F796': "+ unionIndex796));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex797 = (decoder.readIndex());
+        if (unionIndex797 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, null);
+        } else {
+            if (unionIndex797 == 1) {
+                Utf8 charSequence797;
+                Object oldString797 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(797);
+                if (oldString797 instanceof Utf8) {
+                    charSequence797 = (decoder).readString(((Utf8) oldString797));
+                } else {
+                    charSequence797 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, charSequence797);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F797': "+ unionIndex797));
+            }
+        }
+        int unionIndex798 = (decoder.readIndex());
+        if (unionIndex798 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, null);
+        } else {
+            if (unionIndex798 == 1) {
+                Utf8 charSequence798;
+                Object oldString798 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(798);
+                if (oldString798 instanceof Utf8) {
+                    charSequence798 = (decoder).readString(((Utf8) oldString798));
+                } else {
+                    charSequence798 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, charSequence798);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F798': "+ unionIndex798));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex799 = (decoder.readIndex());
+        if (unionIndex799 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, null);
+        } else {
+            if (unionIndex799 == 1) {
+                Utf8 charSequence799;
+                Object oldString799 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(799);
+                if (oldString799 instanceof Utf8) {
+                    charSequence799 = (decoder).readString(((Utf8) oldString799));
+                } else {
+                    charSequence799 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, charSequence799);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F799': "+ unionIndex799));
+            }
+        }
+        int unionIndex800 = (decoder.readIndex());
+        if (unionIndex800 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, null);
+        } else {
+            if (unionIndex800 == 1) {
+                Utf8 charSequence800;
+                Object oldString800 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(800);
+                if (oldString800 instanceof Utf8) {
+                    charSequence800 = (decoder).readString(((Utf8) oldString800));
+                } else {
+                    charSequence800 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, charSequence800);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F800': "+ unionIndex800));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex801 = (decoder.readIndex());
+        if (unionIndex801 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, null);
+        } else {
+            if (unionIndex801 == 1) {
+                Utf8 charSequence801;
+                Object oldString801 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(801);
+                if (oldString801 instanceof Utf8) {
+                    charSequence801 = (decoder).readString(((Utf8) oldString801));
+                } else {
+                    charSequence801 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, charSequence801);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F801': "+ unionIndex801));
+            }
+        }
+        int unionIndex802 = (decoder.readIndex());
+        if (unionIndex802 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, null);
+        } else {
+            if (unionIndex802 == 1) {
+                Utf8 charSequence802;
+                Object oldString802 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(802);
+                if (oldString802 instanceof Utf8) {
+                    charSequence802 = (decoder).readString(((Utf8) oldString802));
+                } else {
+                    charSequence802 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, charSequence802);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F802': "+ unionIndex802));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex803 = (decoder.readIndex());
+        if (unionIndex803 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, null);
+        } else {
+            if (unionIndex803 == 1) {
+                Utf8 charSequence803;
+                Object oldString803 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(803);
+                if (oldString803 instanceof Utf8) {
+                    charSequence803 = (decoder).readString(((Utf8) oldString803));
+                } else {
+                    charSequence803 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, charSequence803);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F803': "+ unionIndex803));
+            }
+        }
+        int unionIndex804 = (decoder.readIndex());
+        if (unionIndex804 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, null);
+        } else {
+            if (unionIndex804 == 1) {
+                Utf8 charSequence804;
+                Object oldString804 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(804);
+                if (oldString804 instanceof Utf8) {
+                    charSequence804 = (decoder).readString(((Utf8) oldString804));
+                } else {
+                    charSequence804 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, charSequence804);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F804': "+ unionIndex804));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex805 = (decoder.readIndex());
+        if (unionIndex805 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, null);
+        } else {
+            if (unionIndex805 == 1) {
+                Utf8 charSequence805;
+                Object oldString805 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(805);
+                if (oldString805 instanceof Utf8) {
+                    charSequence805 = (decoder).readString(((Utf8) oldString805));
+                } else {
+                    charSequence805 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, charSequence805);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F805': "+ unionIndex805));
+            }
+        }
+        int unionIndex806 = (decoder.readIndex());
+        if (unionIndex806 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, null);
+        } else {
+            if (unionIndex806 == 1) {
+                Utf8 charSequence806;
+                Object oldString806 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(806);
+                if (oldString806 instanceof Utf8) {
+                    charSequence806 = (decoder).readString(((Utf8) oldString806));
+                } else {
+                    charSequence806 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, charSequence806);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F806': "+ unionIndex806));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex807 = (decoder.readIndex());
+        if (unionIndex807 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, null);
+        } else {
+            if (unionIndex807 == 1) {
+                Utf8 charSequence807;
+                Object oldString807 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(807);
+                if (oldString807 instanceof Utf8) {
+                    charSequence807 = (decoder).readString(((Utf8) oldString807));
+                } else {
+                    charSequence807 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, charSequence807);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F807': "+ unionIndex807));
+            }
+        }
+        int unionIndex808 = (decoder.readIndex());
+        if (unionIndex808 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, null);
+        } else {
+            if (unionIndex808 == 1) {
+                Utf8 charSequence808;
+                Object oldString808 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(808);
+                if (oldString808 instanceof Utf8) {
+                    charSequence808 = (decoder).readString(((Utf8) oldString808));
+                } else {
+                    charSequence808 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, charSequence808);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F808': "+ unionIndex808));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex809 = (decoder.readIndex());
+        if (unionIndex809 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, null);
+        } else {
+            if (unionIndex809 == 1) {
+                Utf8 charSequence809;
+                Object oldString809 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(809);
+                if (oldString809 instanceof Utf8) {
+                    charSequence809 = (decoder).readString(((Utf8) oldString809));
+                } else {
+                    charSequence809 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, charSequence809);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F809': "+ unionIndex809));
+            }
+        }
+        int unionIndex810 = (decoder.readIndex());
+        if (unionIndex810 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, null);
+        } else {
+            if (unionIndex810 == 1) {
+                Utf8 charSequence810;
+                Object oldString810 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(810);
+                if (oldString810 instanceof Utf8) {
+                    charSequence810 = (decoder).readString(((Utf8) oldString810));
+                } else {
+                    charSequence810 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, charSequence810);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F810': "+ unionIndex810));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex811 = (decoder.readIndex());
+        if (unionIndex811 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, null);
+        } else {
+            if (unionIndex811 == 1) {
+                Utf8 charSequence811;
+                Object oldString811 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(811);
+                if (oldString811 instanceof Utf8) {
+                    charSequence811 = (decoder).readString(((Utf8) oldString811));
+                } else {
+                    charSequence811 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, charSequence811);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F811': "+ unionIndex811));
+            }
+        }
+        int unionIndex812 = (decoder.readIndex());
+        if (unionIndex812 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, null);
+        } else {
+            if (unionIndex812 == 1) {
+                Utf8 charSequence812;
+                Object oldString812 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(812);
+                if (oldString812 instanceof Utf8) {
+                    charSequence812 = (decoder).readString(((Utf8) oldString812));
+                } else {
+                    charSequence812 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, charSequence812);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F812': "+ unionIndex812));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex813 = (decoder.readIndex());
+        if (unionIndex813 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, null);
+        } else {
+            if (unionIndex813 == 1) {
+                Utf8 charSequence813;
+                Object oldString813 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(813);
+                if (oldString813 instanceof Utf8) {
+                    charSequence813 = (decoder).readString(((Utf8) oldString813));
+                } else {
+                    charSequence813 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, charSequence813);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F813': "+ unionIndex813));
+            }
+        }
+        int unionIndex814 = (decoder.readIndex());
+        if (unionIndex814 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, null);
+        } else {
+            if (unionIndex814 == 1) {
+                Utf8 charSequence814;
+                Object oldString814 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(814);
+                if (oldString814 instanceof Utf8) {
+                    charSequence814 = (decoder).readString(((Utf8) oldString814));
+                } else {
+                    charSequence814 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, charSequence814);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F814': "+ unionIndex814));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex815 = (decoder.readIndex());
+        if (unionIndex815 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, null);
+        } else {
+            if (unionIndex815 == 1) {
+                Utf8 charSequence815;
+                Object oldString815 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(815);
+                if (oldString815 instanceof Utf8) {
+                    charSequence815 = (decoder).readString(((Utf8) oldString815));
+                } else {
+                    charSequence815 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, charSequence815);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F815': "+ unionIndex815));
+            }
+        }
+        int unionIndex816 = (decoder.readIndex());
+        if (unionIndex816 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, null);
+        } else {
+            if (unionIndex816 == 1) {
+                Utf8 charSequence816;
+                Object oldString816 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(816);
+                if (oldString816 instanceof Utf8) {
+                    charSequence816 = (decoder).readString(((Utf8) oldString816));
+                } else {
+                    charSequence816 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, charSequence816);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F816': "+ unionIndex816));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex817 = (decoder.readIndex());
+        if (unionIndex817 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, null);
+        } else {
+            if (unionIndex817 == 1) {
+                Utf8 charSequence817;
+                Object oldString817 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(817);
+                if (oldString817 instanceof Utf8) {
+                    charSequence817 = (decoder).readString(((Utf8) oldString817));
+                } else {
+                    charSequence817 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, charSequence817);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F817': "+ unionIndex817));
+            }
+        }
+        int unionIndex818 = (decoder.readIndex());
+        if (unionIndex818 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, null);
+        } else {
+            if (unionIndex818 == 1) {
+                Utf8 charSequence818;
+                Object oldString818 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(818);
+                if (oldString818 instanceof Utf8) {
+                    charSequence818 = (decoder).readString(((Utf8) oldString818));
+                } else {
+                    charSequence818 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, charSequence818);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F818': "+ unionIndex818));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex819 = (decoder.readIndex());
+        if (unionIndex819 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, null);
+        } else {
+            if (unionIndex819 == 1) {
+                Utf8 charSequence819;
+                Object oldString819 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(819);
+                if (oldString819 instanceof Utf8) {
+                    charSequence819 = (decoder).readString(((Utf8) oldString819));
+                } else {
+                    charSequence819 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, charSequence819);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F819': "+ unionIndex819));
+            }
+        }
+        int unionIndex820 = (decoder.readIndex());
+        if (unionIndex820 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, null);
+        } else {
+            if (unionIndex820 == 1) {
+                Utf8 charSequence820;
+                Object oldString820 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(820);
+                if (oldString820 instanceof Utf8) {
+                    charSequence820 = (decoder).readString(((Utf8) oldString820));
+                } else {
+                    charSequence820 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, charSequence820);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F820': "+ unionIndex820));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex821 = (decoder.readIndex());
+        if (unionIndex821 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, null);
+        } else {
+            if (unionIndex821 == 1) {
+                Utf8 charSequence821;
+                Object oldString821 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(821);
+                if (oldString821 instanceof Utf8) {
+                    charSequence821 = (decoder).readString(((Utf8) oldString821));
+                } else {
+                    charSequence821 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, charSequence821);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F821': "+ unionIndex821));
+            }
+        }
+        int unionIndex822 = (decoder.readIndex());
+        if (unionIndex822 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, null);
+        } else {
+            if (unionIndex822 == 1) {
+                Utf8 charSequence822;
+                Object oldString822 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(822);
+                if (oldString822 instanceof Utf8) {
+                    charSequence822 = (decoder).readString(((Utf8) oldString822));
+                } else {
+                    charSequence822 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, charSequence822);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F822': "+ unionIndex822));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex823 = (decoder.readIndex());
+        if (unionIndex823 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, null);
+        } else {
+            if (unionIndex823 == 1) {
+                Utf8 charSequence823;
+                Object oldString823 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(823);
+                if (oldString823 instanceof Utf8) {
+                    charSequence823 = (decoder).readString(((Utf8) oldString823));
+                } else {
+                    charSequence823 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, charSequence823);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F823': "+ unionIndex823));
+            }
+        }
+        int unionIndex824 = (decoder.readIndex());
+        if (unionIndex824 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, null);
+        } else {
+            if (unionIndex824 == 1) {
+                Utf8 charSequence824;
+                Object oldString824 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(824);
+                if (oldString824 instanceof Utf8) {
+                    charSequence824 = (decoder).readString(((Utf8) oldString824));
+                } else {
+                    charSequence824 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, charSequence824);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F824': "+ unionIndex824));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex825 = (decoder.readIndex());
+        if (unionIndex825 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, null);
+        } else {
+            if (unionIndex825 == 1) {
+                Utf8 charSequence825;
+                Object oldString825 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(825);
+                if (oldString825 instanceof Utf8) {
+                    charSequence825 = (decoder).readString(((Utf8) oldString825));
+                } else {
+                    charSequence825 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, charSequence825);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F825': "+ unionIndex825));
+            }
+        }
+        int unionIndex826 = (decoder.readIndex());
+        if (unionIndex826 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, null);
+        } else {
+            if (unionIndex826 == 1) {
+                Utf8 charSequence826;
+                Object oldString826 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(826);
+                if (oldString826 instanceof Utf8) {
+                    charSequence826 = (decoder).readString(((Utf8) oldString826));
+                } else {
+                    charSequence826 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, charSequence826);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F826': "+ unionIndex826));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex827 = (decoder.readIndex());
+        if (unionIndex827 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, null);
+        } else {
+            if (unionIndex827 == 1) {
+                Utf8 charSequence827;
+                Object oldString827 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(827);
+                if (oldString827 instanceof Utf8) {
+                    charSequence827 = (decoder).readString(((Utf8) oldString827));
+                } else {
+                    charSequence827 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, charSequence827);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F827': "+ unionIndex827));
+            }
+        }
+        int unionIndex828 = (decoder.readIndex());
+        if (unionIndex828 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, null);
+        } else {
+            if (unionIndex828 == 1) {
+                Utf8 charSequence828;
+                Object oldString828 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(828);
+                if (oldString828 instanceof Utf8) {
+                    charSequence828 = (decoder).readString(((Utf8) oldString828));
+                } else {
+                    charSequence828 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, charSequence828);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F828': "+ unionIndex828));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex829 = (decoder.readIndex());
+        if (unionIndex829 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, null);
+        } else {
+            if (unionIndex829 == 1) {
+                Utf8 charSequence829;
+                Object oldString829 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(829);
+                if (oldString829 instanceof Utf8) {
+                    charSequence829 = (decoder).readString(((Utf8) oldString829));
+                } else {
+                    charSequence829 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, charSequence829);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F829': "+ unionIndex829));
+            }
+        }
+        int unionIndex830 = (decoder.readIndex());
+        if (unionIndex830 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, null);
+        } else {
+            if (unionIndex830 == 1) {
+                Utf8 charSequence830;
+                Object oldString830 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(830);
+                if (oldString830 instanceof Utf8) {
+                    charSequence830 = (decoder).readString(((Utf8) oldString830));
+                } else {
+                    charSequence830 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, charSequence830);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F830': "+ unionIndex830));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex831 = (decoder.readIndex());
+        if (unionIndex831 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, null);
+        } else {
+            if (unionIndex831 == 1) {
+                Utf8 charSequence831;
+                Object oldString831 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(831);
+                if (oldString831 instanceof Utf8) {
+                    charSequence831 = (decoder).readString(((Utf8) oldString831));
+                } else {
+                    charSequence831 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, charSequence831);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F831': "+ unionIndex831));
+            }
+        }
+        int unionIndex832 = (decoder.readIndex());
+        if (unionIndex832 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, null);
+        } else {
+            if (unionIndex832 == 1) {
+                Utf8 charSequence832;
+                Object oldString832 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(832);
+                if (oldString832 instanceof Utf8) {
+                    charSequence832 = (decoder).readString(((Utf8) oldString832));
+                } else {
+                    charSequence832 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, charSequence832);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F832': "+ unionIndex832));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex833 = (decoder.readIndex());
+        if (unionIndex833 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, null);
+        } else {
+            if (unionIndex833 == 1) {
+                Utf8 charSequence833;
+                Object oldString833 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(833);
+                if (oldString833 instanceof Utf8) {
+                    charSequence833 = (decoder).readString(((Utf8) oldString833));
+                } else {
+                    charSequence833 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, charSequence833);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F833': "+ unionIndex833));
+            }
+        }
+        int unionIndex834 = (decoder.readIndex());
+        if (unionIndex834 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, null);
+        } else {
+            if (unionIndex834 == 1) {
+                Utf8 charSequence834;
+                Object oldString834 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(834);
+                if (oldString834 instanceof Utf8) {
+                    charSequence834 = (decoder).readString(((Utf8) oldString834));
+                } else {
+                    charSequence834 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, charSequence834);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F834': "+ unionIndex834));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex835 = (decoder.readIndex());
+        if (unionIndex835 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, null);
+        } else {
+            if (unionIndex835 == 1) {
+                Utf8 charSequence835;
+                Object oldString835 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(835);
+                if (oldString835 instanceof Utf8) {
+                    charSequence835 = (decoder).readString(((Utf8) oldString835));
+                } else {
+                    charSequence835 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, charSequence835);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F835': "+ unionIndex835));
+            }
+        }
+        int unionIndex836 = (decoder.readIndex());
+        if (unionIndex836 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, null);
+        } else {
+            if (unionIndex836 == 1) {
+                Utf8 charSequence836;
+                Object oldString836 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(836);
+                if (oldString836 instanceof Utf8) {
+                    charSequence836 = (decoder).readString(((Utf8) oldString836));
+                } else {
+                    charSequence836 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, charSequence836);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F836': "+ unionIndex836));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex837 = (decoder.readIndex());
+        if (unionIndex837 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, null);
+        } else {
+            if (unionIndex837 == 1) {
+                Utf8 charSequence837;
+                Object oldString837 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(837);
+                if (oldString837 instanceof Utf8) {
+                    charSequence837 = (decoder).readString(((Utf8) oldString837));
+                } else {
+                    charSequence837 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, charSequence837);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F837': "+ unionIndex837));
+            }
+        }
+        int unionIndex838 = (decoder.readIndex());
+        if (unionIndex838 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, null);
+        } else {
+            if (unionIndex838 == 1) {
+                Utf8 charSequence838;
+                Object oldString838 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(838);
+                if (oldString838 instanceof Utf8) {
+                    charSequence838 = (decoder).readString(((Utf8) oldString838));
+                } else {
+                    charSequence838 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, charSequence838);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F838': "+ unionIndex838));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex839 = (decoder.readIndex());
+        if (unionIndex839 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, null);
+        } else {
+            if (unionIndex839 == 1) {
+                Utf8 charSequence839;
+                Object oldString839 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(839);
+                if (oldString839 instanceof Utf8) {
+                    charSequence839 = (decoder).readString(((Utf8) oldString839));
+                } else {
+                    charSequence839 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, charSequence839);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F839': "+ unionIndex839));
+            }
+        }
+        int unionIndex840 = (decoder.readIndex());
+        if (unionIndex840 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, null);
+        } else {
+            if (unionIndex840 == 1) {
+                Utf8 charSequence840;
+                Object oldString840 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(840);
+                if (oldString840 instanceof Utf8) {
+                    charSequence840 = (decoder).readString(((Utf8) oldString840));
+                } else {
+                    charSequence840 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, charSequence840);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F840': "+ unionIndex840));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex841 = (decoder.readIndex());
+        if (unionIndex841 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, null);
+        } else {
+            if (unionIndex841 == 1) {
+                Utf8 charSequence841;
+                Object oldString841 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(841);
+                if (oldString841 instanceof Utf8) {
+                    charSequence841 = (decoder).readString(((Utf8) oldString841));
+                } else {
+                    charSequence841 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, charSequence841);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F841': "+ unionIndex841));
+            }
+        }
+        int unionIndex842 = (decoder.readIndex());
+        if (unionIndex842 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, null);
+        } else {
+            if (unionIndex842 == 1) {
+                Utf8 charSequence842;
+                Object oldString842 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(842);
+                if (oldString842 instanceof Utf8) {
+                    charSequence842 = (decoder).readString(((Utf8) oldString842));
+                } else {
+                    charSequence842 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, charSequence842);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F842': "+ unionIndex842));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex843 = (decoder.readIndex());
+        if (unionIndex843 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, null);
+        } else {
+            if (unionIndex843 == 1) {
+                Utf8 charSequence843;
+                Object oldString843 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(843);
+                if (oldString843 instanceof Utf8) {
+                    charSequence843 = (decoder).readString(((Utf8) oldString843));
+                } else {
+                    charSequence843 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, charSequence843);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F843': "+ unionIndex843));
+            }
+        }
+        int unionIndex844 = (decoder.readIndex());
+        if (unionIndex844 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, null);
+        } else {
+            if (unionIndex844 == 1) {
+                Utf8 charSequence844;
+                Object oldString844 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(844);
+                if (oldString844 instanceof Utf8) {
+                    charSequence844 = (decoder).readString(((Utf8) oldString844));
+                } else {
+                    charSequence844 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, charSequence844);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F844': "+ unionIndex844));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex845 = (decoder.readIndex());
+        if (unionIndex845 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, null);
+        } else {
+            if (unionIndex845 == 1) {
+                Utf8 charSequence845;
+                Object oldString845 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(845);
+                if (oldString845 instanceof Utf8) {
+                    charSequence845 = (decoder).readString(((Utf8) oldString845));
+                } else {
+                    charSequence845 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, charSequence845);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F845': "+ unionIndex845));
+            }
+        }
+        int unionIndex846 = (decoder.readIndex());
+        if (unionIndex846 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, null);
+        } else {
+            if (unionIndex846 == 1) {
+                Utf8 charSequence846;
+                Object oldString846 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(846);
+                if (oldString846 instanceof Utf8) {
+                    charSequence846 = (decoder).readString(((Utf8) oldString846));
+                } else {
+                    charSequence846 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, charSequence846);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F846': "+ unionIndex846));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex847 = (decoder.readIndex());
+        if (unionIndex847 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, null);
+        } else {
+            if (unionIndex847 == 1) {
+                Utf8 charSequence847;
+                Object oldString847 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(847);
+                if (oldString847 instanceof Utf8) {
+                    charSequence847 = (decoder).readString(((Utf8) oldString847));
+                } else {
+                    charSequence847 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, charSequence847);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F847': "+ unionIndex847));
+            }
+        }
+        int unionIndex848 = (decoder.readIndex());
+        if (unionIndex848 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, null);
+        } else {
+            if (unionIndex848 == 1) {
+                Utf8 charSequence848;
+                Object oldString848 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(848);
+                if (oldString848 instanceof Utf8) {
+                    charSequence848 = (decoder).readString(((Utf8) oldString848));
+                } else {
+                    charSequence848 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, charSequence848);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F848': "+ unionIndex848));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex849 = (decoder.readIndex());
+        if (unionIndex849 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, null);
+        } else {
+            if (unionIndex849 == 1) {
+                Utf8 charSequence849;
+                Object oldString849 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(849);
+                if (oldString849 instanceof Utf8) {
+                    charSequence849 = (decoder).readString(((Utf8) oldString849));
+                } else {
+                    charSequence849 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, charSequence849);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F849': "+ unionIndex849));
+            }
+        }
+        int unionIndex850 = (decoder.readIndex());
+        if (unionIndex850 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, null);
+        } else {
+            if (unionIndex850 == 1) {
+                Utf8 charSequence850;
+                Object oldString850 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(850);
+                if (oldString850 instanceof Utf8) {
+                    charSequence850 = (decoder).readString(((Utf8) oldString850));
+                } else {
+                    charSequence850 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, charSequence850);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F850': "+ unionIndex850));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex851 = (decoder.readIndex());
+        if (unionIndex851 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, null);
+        } else {
+            if (unionIndex851 == 1) {
+                Utf8 charSequence851;
+                Object oldString851 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(851);
+                if (oldString851 instanceof Utf8) {
+                    charSequence851 = (decoder).readString(((Utf8) oldString851));
+                } else {
+                    charSequence851 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, charSequence851);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F851': "+ unionIndex851));
+            }
+        }
+        int unionIndex852 = (decoder.readIndex());
+        if (unionIndex852 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, null);
+        } else {
+            if (unionIndex852 == 1) {
+                Utf8 charSequence852;
+                Object oldString852 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(852);
+                if (oldString852 instanceof Utf8) {
+                    charSequence852 = (decoder).readString(((Utf8) oldString852));
+                } else {
+                    charSequence852 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, charSequence852);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F852': "+ unionIndex852));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex853 = (decoder.readIndex());
+        if (unionIndex853 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, null);
+        } else {
+            if (unionIndex853 == 1) {
+                Utf8 charSequence853;
+                Object oldString853 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(853);
+                if (oldString853 instanceof Utf8) {
+                    charSequence853 = (decoder).readString(((Utf8) oldString853));
+                } else {
+                    charSequence853 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, charSequence853);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F853': "+ unionIndex853));
+            }
+        }
+        int unionIndex854 = (decoder.readIndex());
+        if (unionIndex854 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, null);
+        } else {
+            if (unionIndex854 == 1) {
+                Utf8 charSequence854;
+                Object oldString854 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(854);
+                if (oldString854 instanceof Utf8) {
+                    charSequence854 = (decoder).readString(((Utf8) oldString854));
+                } else {
+                    charSequence854 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, charSequence854);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F854': "+ unionIndex854));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex855 = (decoder.readIndex());
+        if (unionIndex855 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, null);
+        } else {
+            if (unionIndex855 == 1) {
+                Utf8 charSequence855;
+                Object oldString855 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(855);
+                if (oldString855 instanceof Utf8) {
+                    charSequence855 = (decoder).readString(((Utf8) oldString855));
+                } else {
+                    charSequence855 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, charSequence855);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F855': "+ unionIndex855));
+            }
+        }
+        int unionIndex856 = (decoder.readIndex());
+        if (unionIndex856 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, null);
+        } else {
+            if (unionIndex856 == 1) {
+                Utf8 charSequence856;
+                Object oldString856 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(856);
+                if (oldString856 instanceof Utf8) {
+                    charSequence856 = (decoder).readString(((Utf8) oldString856));
+                } else {
+                    charSequence856 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, charSequence856);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F856': "+ unionIndex856));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex857 = (decoder.readIndex());
+        if (unionIndex857 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, null);
+        } else {
+            if (unionIndex857 == 1) {
+                Utf8 charSequence857;
+                Object oldString857 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(857);
+                if (oldString857 instanceof Utf8) {
+                    charSequence857 = (decoder).readString(((Utf8) oldString857));
+                } else {
+                    charSequence857 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, charSequence857);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F857': "+ unionIndex857));
+            }
+        }
+        int unionIndex858 = (decoder.readIndex());
+        if (unionIndex858 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, null);
+        } else {
+            if (unionIndex858 == 1) {
+                Utf8 charSequence858;
+                Object oldString858 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(858);
+                if (oldString858 instanceof Utf8) {
+                    charSequence858 = (decoder).readString(((Utf8) oldString858));
+                } else {
+                    charSequence858 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, charSequence858);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F858': "+ unionIndex858));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex859 = (decoder.readIndex());
+        if (unionIndex859 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, null);
+        } else {
+            if (unionIndex859 == 1) {
+                Utf8 charSequence859;
+                Object oldString859 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(859);
+                if (oldString859 instanceof Utf8) {
+                    charSequence859 = (decoder).readString(((Utf8) oldString859));
+                } else {
+                    charSequence859 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, charSequence859);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F859': "+ unionIndex859));
+            }
+        }
+        int unionIndex860 = (decoder.readIndex());
+        if (unionIndex860 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, null);
+        } else {
+            if (unionIndex860 == 1) {
+                Utf8 charSequence860;
+                Object oldString860 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(860);
+                if (oldString860 instanceof Utf8) {
+                    charSequence860 = (decoder).readString(((Utf8) oldString860));
+                } else {
+                    charSequence860 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, charSequence860);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F860': "+ unionIndex860));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex861 = (decoder.readIndex());
+        if (unionIndex861 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, null);
+        } else {
+            if (unionIndex861 == 1) {
+                Utf8 charSequence861;
+                Object oldString861 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(861);
+                if (oldString861 instanceof Utf8) {
+                    charSequence861 = (decoder).readString(((Utf8) oldString861));
+                } else {
+                    charSequence861 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, charSequence861);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F861': "+ unionIndex861));
+            }
+        }
+        int unionIndex862 = (decoder.readIndex());
+        if (unionIndex862 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, null);
+        } else {
+            if (unionIndex862 == 1) {
+                Utf8 charSequence862;
+                Object oldString862 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(862);
+                if (oldString862 instanceof Utf8) {
+                    charSequence862 = (decoder).readString(((Utf8) oldString862));
+                } else {
+                    charSequence862 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, charSequence862);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F862': "+ unionIndex862));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex863 = (decoder.readIndex());
+        if (unionIndex863 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, null);
+        } else {
+            if (unionIndex863 == 1) {
+                Utf8 charSequence863;
+                Object oldString863 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(863);
+                if (oldString863 instanceof Utf8) {
+                    charSequence863 = (decoder).readString(((Utf8) oldString863));
+                } else {
+                    charSequence863 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, charSequence863);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F863': "+ unionIndex863));
+            }
+        }
+        int unionIndex864 = (decoder.readIndex());
+        if (unionIndex864 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, null);
+        } else {
+            if (unionIndex864 == 1) {
+                Utf8 charSequence864;
+                Object oldString864 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(864);
+                if (oldString864 instanceof Utf8) {
+                    charSequence864 = (decoder).readString(((Utf8) oldString864));
+                } else {
+                    charSequence864 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, charSequence864);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F864': "+ unionIndex864));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex865 = (decoder.readIndex());
+        if (unionIndex865 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, null);
+        } else {
+            if (unionIndex865 == 1) {
+                Utf8 charSequence865;
+                Object oldString865 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(865);
+                if (oldString865 instanceof Utf8) {
+                    charSequence865 = (decoder).readString(((Utf8) oldString865));
+                } else {
+                    charSequence865 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, charSequence865);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F865': "+ unionIndex865));
+            }
+        }
+        int unionIndex866 = (decoder.readIndex());
+        if (unionIndex866 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, null);
+        } else {
+            if (unionIndex866 == 1) {
+                Utf8 charSequence866;
+                Object oldString866 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(866);
+                if (oldString866 instanceof Utf8) {
+                    charSequence866 = (decoder).readString(((Utf8) oldString866));
+                } else {
+                    charSequence866 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, charSequence866);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F866': "+ unionIndex866));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex867 = (decoder.readIndex());
+        if (unionIndex867 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, null);
+        } else {
+            if (unionIndex867 == 1) {
+                Utf8 charSequence867;
+                Object oldString867 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(867);
+                if (oldString867 instanceof Utf8) {
+                    charSequence867 = (decoder).readString(((Utf8) oldString867));
+                } else {
+                    charSequence867 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, charSequence867);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F867': "+ unionIndex867));
+            }
+        }
+        int unionIndex868 = (decoder.readIndex());
+        if (unionIndex868 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, null);
+        } else {
+            if (unionIndex868 == 1) {
+                Utf8 charSequence868;
+                Object oldString868 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(868);
+                if (oldString868 instanceof Utf8) {
+                    charSequence868 = (decoder).readString(((Utf8) oldString868));
+                } else {
+                    charSequence868 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, charSequence868);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F868': "+ unionIndex868));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex869 = (decoder.readIndex());
+        if (unionIndex869 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, null);
+        } else {
+            if (unionIndex869 == 1) {
+                Utf8 charSequence869;
+                Object oldString869 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(869);
+                if (oldString869 instanceof Utf8) {
+                    charSequence869 = (decoder).readString(((Utf8) oldString869));
+                } else {
+                    charSequence869 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, charSequence869);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F869': "+ unionIndex869));
+            }
+        }
+        int unionIndex870 = (decoder.readIndex());
+        if (unionIndex870 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, null);
+        } else {
+            if (unionIndex870 == 1) {
+                Utf8 charSequence870;
+                Object oldString870 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(870);
+                if (oldString870 instanceof Utf8) {
+                    charSequence870 = (decoder).readString(((Utf8) oldString870));
+                } else {
+                    charSequence870 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, charSequence870);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F870': "+ unionIndex870));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex871 = (decoder.readIndex());
+        if (unionIndex871 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, null);
+        } else {
+            if (unionIndex871 == 1) {
+                Utf8 charSequence871;
+                Object oldString871 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(871);
+                if (oldString871 instanceof Utf8) {
+                    charSequence871 = (decoder).readString(((Utf8) oldString871));
+                } else {
+                    charSequence871 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, charSequence871);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F871': "+ unionIndex871));
+            }
+        }
+        int unionIndex872 = (decoder.readIndex());
+        if (unionIndex872 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, null);
+        } else {
+            if (unionIndex872 == 1) {
+                Utf8 charSequence872;
+                Object oldString872 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(872);
+                if (oldString872 instanceof Utf8) {
+                    charSequence872 = (decoder).readString(((Utf8) oldString872));
+                } else {
+                    charSequence872 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, charSequence872);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F872': "+ unionIndex872));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex873 = (decoder.readIndex());
+        if (unionIndex873 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, null);
+        } else {
+            if (unionIndex873 == 1) {
+                Utf8 charSequence873;
+                Object oldString873 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(873);
+                if (oldString873 instanceof Utf8) {
+                    charSequence873 = (decoder).readString(((Utf8) oldString873));
+                } else {
+                    charSequence873 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, charSequence873);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F873': "+ unionIndex873));
+            }
+        }
+        int unionIndex874 = (decoder.readIndex());
+        if (unionIndex874 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, null);
+        } else {
+            if (unionIndex874 == 1) {
+                Utf8 charSequence874;
+                Object oldString874 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(874);
+                if (oldString874 instanceof Utf8) {
+                    charSequence874 = (decoder).readString(((Utf8) oldString874));
+                } else {
+                    charSequence874 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, charSequence874);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F874': "+ unionIndex874));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex875 = (decoder.readIndex());
+        if (unionIndex875 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, null);
+        } else {
+            if (unionIndex875 == 1) {
+                Utf8 charSequence875;
+                Object oldString875 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(875);
+                if (oldString875 instanceof Utf8) {
+                    charSequence875 = (decoder).readString(((Utf8) oldString875));
+                } else {
+                    charSequence875 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, charSequence875);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F875': "+ unionIndex875));
+            }
+        }
+        int unionIndex876 = (decoder.readIndex());
+        if (unionIndex876 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, null);
+        } else {
+            if (unionIndex876 == 1) {
+                Utf8 charSequence876;
+                Object oldString876 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(876);
+                if (oldString876 instanceof Utf8) {
+                    charSequence876 = (decoder).readString(((Utf8) oldString876));
+                } else {
+                    charSequence876 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, charSequence876);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F876': "+ unionIndex876));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex877 = (decoder.readIndex());
+        if (unionIndex877 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, null);
+        } else {
+            if (unionIndex877 == 1) {
+                Utf8 charSequence877;
+                Object oldString877 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(877);
+                if (oldString877 instanceof Utf8) {
+                    charSequence877 = (decoder).readString(((Utf8) oldString877));
+                } else {
+                    charSequence877 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, charSequence877);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F877': "+ unionIndex877));
+            }
+        }
+        int unionIndex878 = (decoder.readIndex());
+        if (unionIndex878 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, null);
+        } else {
+            if (unionIndex878 == 1) {
+                Utf8 charSequence878;
+                Object oldString878 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(878);
+                if (oldString878 instanceof Utf8) {
+                    charSequence878 = (decoder).readString(((Utf8) oldString878));
+                } else {
+                    charSequence878 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, charSequence878);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F878': "+ unionIndex878));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex879 = (decoder.readIndex());
+        if (unionIndex879 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, null);
+        } else {
+            if (unionIndex879 == 1) {
+                Utf8 charSequence879;
+                Object oldString879 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(879);
+                if (oldString879 instanceof Utf8) {
+                    charSequence879 = (decoder).readString(((Utf8) oldString879));
+                } else {
+                    charSequence879 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, charSequence879);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F879': "+ unionIndex879));
+            }
+        }
+        int unionIndex880 = (decoder.readIndex());
+        if (unionIndex880 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, null);
+        } else {
+            if (unionIndex880 == 1) {
+                Utf8 charSequence880;
+                Object oldString880 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(880);
+                if (oldString880 instanceof Utf8) {
+                    charSequence880 = (decoder).readString(((Utf8) oldString880));
+                } else {
+                    charSequence880 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, charSequence880);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F880': "+ unionIndex880));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex881 = (decoder.readIndex());
+        if (unionIndex881 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, null);
+        } else {
+            if (unionIndex881 == 1) {
+                Utf8 charSequence881;
+                Object oldString881 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(881);
+                if (oldString881 instanceof Utf8) {
+                    charSequence881 = (decoder).readString(((Utf8) oldString881));
+                } else {
+                    charSequence881 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, charSequence881);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F881': "+ unionIndex881));
+            }
+        }
+        int unionIndex882 = (decoder.readIndex());
+        if (unionIndex882 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, null);
+        } else {
+            if (unionIndex882 == 1) {
+                Utf8 charSequence882;
+                Object oldString882 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(882);
+                if (oldString882 instanceof Utf8) {
+                    charSequence882 = (decoder).readString(((Utf8) oldString882));
+                } else {
+                    charSequence882 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, charSequence882);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F882': "+ unionIndex882));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex883 = (decoder.readIndex());
+        if (unionIndex883 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, null);
+        } else {
+            if (unionIndex883 == 1) {
+                Utf8 charSequence883;
+                Object oldString883 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(883);
+                if (oldString883 instanceof Utf8) {
+                    charSequence883 = (decoder).readString(((Utf8) oldString883));
+                } else {
+                    charSequence883 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, charSequence883);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F883': "+ unionIndex883));
+            }
+        }
+        int unionIndex884 = (decoder.readIndex());
+        if (unionIndex884 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, null);
+        } else {
+            if (unionIndex884 == 1) {
+                Utf8 charSequence884;
+                Object oldString884 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(884);
+                if (oldString884 instanceof Utf8) {
+                    charSequence884 = (decoder).readString(((Utf8) oldString884));
+                } else {
+                    charSequence884 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, charSequence884);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F884': "+ unionIndex884));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex885 = (decoder.readIndex());
+        if (unionIndex885 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, null);
+        } else {
+            if (unionIndex885 == 1) {
+                Utf8 charSequence885;
+                Object oldString885 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(885);
+                if (oldString885 instanceof Utf8) {
+                    charSequence885 = (decoder).readString(((Utf8) oldString885));
+                } else {
+                    charSequence885 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, charSequence885);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F885': "+ unionIndex885));
+            }
+        }
+        int unionIndex886 = (decoder.readIndex());
+        if (unionIndex886 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, null);
+        } else {
+            if (unionIndex886 == 1) {
+                Utf8 charSequence886;
+                Object oldString886 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(886);
+                if (oldString886 instanceof Utf8) {
+                    charSequence886 = (decoder).readString(((Utf8) oldString886));
+                } else {
+                    charSequence886 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, charSequence886);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F886': "+ unionIndex886));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex887 = (decoder.readIndex());
+        if (unionIndex887 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, null);
+        } else {
+            if (unionIndex887 == 1) {
+                Utf8 charSequence887;
+                Object oldString887 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(887);
+                if (oldString887 instanceof Utf8) {
+                    charSequence887 = (decoder).readString(((Utf8) oldString887));
+                } else {
+                    charSequence887 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, charSequence887);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F887': "+ unionIndex887));
+            }
+        }
+        int unionIndex888 = (decoder.readIndex());
+        if (unionIndex888 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, null);
+        } else {
+            if (unionIndex888 == 1) {
+                Utf8 charSequence888;
+                Object oldString888 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(888);
+                if (oldString888 instanceof Utf8) {
+                    charSequence888 = (decoder).readString(((Utf8) oldString888));
+                } else {
+                    charSequence888 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, charSequence888);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F888': "+ unionIndex888));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex889 = (decoder.readIndex());
+        if (unionIndex889 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, null);
+        } else {
+            if (unionIndex889 == 1) {
+                Utf8 charSequence889;
+                Object oldString889 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(889);
+                if (oldString889 instanceof Utf8) {
+                    charSequence889 = (decoder).readString(((Utf8) oldString889));
+                } else {
+                    charSequence889 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, charSequence889);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F889': "+ unionIndex889));
+            }
+        }
+        int unionIndex890 = (decoder.readIndex());
+        if (unionIndex890 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, null);
+        } else {
+            if (unionIndex890 == 1) {
+                Utf8 charSequence890;
+                Object oldString890 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(890);
+                if (oldString890 instanceof Utf8) {
+                    charSequence890 = (decoder).readString(((Utf8) oldString890));
+                } else {
+                    charSequence890 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, charSequence890);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F890': "+ unionIndex890));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex891 = (decoder.readIndex());
+        if (unionIndex891 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, null);
+        } else {
+            if (unionIndex891 == 1) {
+                Utf8 charSequence891;
+                Object oldString891 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(891);
+                if (oldString891 instanceof Utf8) {
+                    charSequence891 = (decoder).readString(((Utf8) oldString891));
+                } else {
+                    charSequence891 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, charSequence891);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F891': "+ unionIndex891));
+            }
+        }
+        int unionIndex892 = (decoder.readIndex());
+        if (unionIndex892 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, null);
+        } else {
+            if (unionIndex892 == 1) {
+                Utf8 charSequence892;
+                Object oldString892 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(892);
+                if (oldString892 instanceof Utf8) {
+                    charSequence892 = (decoder).readString(((Utf8) oldString892));
+                } else {
+                    charSequence892 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, charSequence892);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F892': "+ unionIndex892));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex893 = (decoder.readIndex());
+        if (unionIndex893 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, null);
+        } else {
+            if (unionIndex893 == 1) {
+                Utf8 charSequence893;
+                Object oldString893 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(893);
+                if (oldString893 instanceof Utf8) {
+                    charSequence893 = (decoder).readString(((Utf8) oldString893));
+                } else {
+                    charSequence893 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, charSequence893);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F893': "+ unionIndex893));
+            }
+        }
+        int unionIndex894 = (decoder.readIndex());
+        if (unionIndex894 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, null);
+        } else {
+            if (unionIndex894 == 1) {
+                Utf8 charSequence894;
+                Object oldString894 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(894);
+                if (oldString894 instanceof Utf8) {
+                    charSequence894 = (decoder).readString(((Utf8) oldString894));
+                } else {
+                    charSequence894 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, charSequence894);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F894': "+ unionIndex894));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex895 = (decoder.readIndex());
+        if (unionIndex895 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, null);
+        } else {
+            if (unionIndex895 == 1) {
+                Utf8 charSequence895;
+                Object oldString895 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(895);
+                if (oldString895 instanceof Utf8) {
+                    charSequence895 = (decoder).readString(((Utf8) oldString895));
+                } else {
+                    charSequence895 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, charSequence895);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F895': "+ unionIndex895));
+            }
+        }
+        int unionIndex896 = (decoder.readIndex());
+        if (unionIndex896 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, null);
+        } else {
+            if (unionIndex896 == 1) {
+                Utf8 charSequence896;
+                Object oldString896 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(896);
+                if (oldString896 instanceof Utf8) {
+                    charSequence896 = (decoder).readString(((Utf8) oldString896));
+                } else {
+                    charSequence896 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, charSequence896);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F896': "+ unionIndex896));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex897 = (decoder.readIndex());
+        if (unionIndex897 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, null);
+        } else {
+            if (unionIndex897 == 1) {
+                Utf8 charSequence897;
+                Object oldString897 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(897);
+                if (oldString897 instanceof Utf8) {
+                    charSequence897 = (decoder).readString(((Utf8) oldString897));
+                } else {
+                    charSequence897 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, charSequence897);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F897': "+ unionIndex897));
+            }
+        }
+        int unionIndex898 = (decoder.readIndex());
+        if (unionIndex898 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, null);
+        } else {
+            if (unionIndex898 == 1) {
+                Utf8 charSequence898;
+                Object oldString898 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(898);
+                if (oldString898 instanceof Utf8) {
+                    charSequence898 = (decoder).readString(((Utf8) oldString898));
+                } else {
+                    charSequence898 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, charSequence898);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F898': "+ unionIndex898));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex899 = (decoder.readIndex());
+        if (unionIndex899 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, null);
+        } else {
+            if (unionIndex899 == 1) {
+                Utf8 charSequence899;
+                Object oldString899 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(899);
+                if (oldString899 instanceof Utf8) {
+                    charSequence899 = (decoder).readString(((Utf8) oldString899));
+                } else {
+                    charSequence899 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, charSequence899);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F899': "+ unionIndex899));
+            }
+        }
+        int unionIndex900 = (decoder.readIndex());
+        if (unionIndex900 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, null);
+        } else {
+            if (unionIndex900 == 1) {
+                Utf8 charSequence900;
+                Object oldString900 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(900);
+                if (oldString900 instanceof Utf8) {
+                    charSequence900 = (decoder).readString(((Utf8) oldString900));
+                } else {
+                    charSequence900 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, charSequence900);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F900': "+ unionIndex900));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex901 = (decoder.readIndex());
+        if (unionIndex901 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, null);
+        } else {
+            if (unionIndex901 == 1) {
+                Utf8 charSequence901;
+                Object oldString901 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(901);
+                if (oldString901 instanceof Utf8) {
+                    charSequence901 = (decoder).readString(((Utf8) oldString901));
+                } else {
+                    charSequence901 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, charSequence901);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F901': "+ unionIndex901));
+            }
+        }
+        int unionIndex902 = (decoder.readIndex());
+        if (unionIndex902 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, null);
+        } else {
+            if (unionIndex902 == 1) {
+                Utf8 charSequence902;
+                Object oldString902 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(902);
+                if (oldString902 instanceof Utf8) {
+                    charSequence902 = (decoder).readString(((Utf8) oldString902));
+                } else {
+                    charSequence902 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, charSequence902);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F902': "+ unionIndex902));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex903 = (decoder.readIndex());
+        if (unionIndex903 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, null);
+        } else {
+            if (unionIndex903 == 1) {
+                Utf8 charSequence903;
+                Object oldString903 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(903);
+                if (oldString903 instanceof Utf8) {
+                    charSequence903 = (decoder).readString(((Utf8) oldString903));
+                } else {
+                    charSequence903 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, charSequence903);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F903': "+ unionIndex903));
+            }
+        }
+        int unionIndex904 = (decoder.readIndex());
+        if (unionIndex904 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, null);
+        } else {
+            if (unionIndex904 == 1) {
+                Utf8 charSequence904;
+                Object oldString904 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(904);
+                if (oldString904 instanceof Utf8) {
+                    charSequence904 = (decoder).readString(((Utf8) oldString904));
+                } else {
+                    charSequence904 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, charSequence904);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F904': "+ unionIndex904));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex905 = (decoder.readIndex());
+        if (unionIndex905 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, null);
+        } else {
+            if (unionIndex905 == 1) {
+                Utf8 charSequence905;
+                Object oldString905 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(905);
+                if (oldString905 instanceof Utf8) {
+                    charSequence905 = (decoder).readString(((Utf8) oldString905));
+                } else {
+                    charSequence905 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, charSequence905);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F905': "+ unionIndex905));
+            }
+        }
+        int unionIndex906 = (decoder.readIndex());
+        if (unionIndex906 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, null);
+        } else {
+            if (unionIndex906 == 1) {
+                Utf8 charSequence906;
+                Object oldString906 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(906);
+                if (oldString906 instanceof Utf8) {
+                    charSequence906 = (decoder).readString(((Utf8) oldString906));
+                } else {
+                    charSequence906 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, charSequence906);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F906': "+ unionIndex906));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex907 = (decoder.readIndex());
+        if (unionIndex907 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, null);
+        } else {
+            if (unionIndex907 == 1) {
+                Utf8 charSequence907;
+                Object oldString907 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(907);
+                if (oldString907 instanceof Utf8) {
+                    charSequence907 = (decoder).readString(((Utf8) oldString907));
+                } else {
+                    charSequence907 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, charSequence907);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F907': "+ unionIndex907));
+            }
+        }
+        int unionIndex908 = (decoder.readIndex());
+        if (unionIndex908 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, null);
+        } else {
+            if (unionIndex908 == 1) {
+                Utf8 charSequence908;
+                Object oldString908 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(908);
+                if (oldString908 instanceof Utf8) {
+                    charSequence908 = (decoder).readString(((Utf8) oldString908));
+                } else {
+                    charSequence908 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, charSequence908);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F908': "+ unionIndex908));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex909 = (decoder.readIndex());
+        if (unionIndex909 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, null);
+        } else {
+            if (unionIndex909 == 1) {
+                Utf8 charSequence909;
+                Object oldString909 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(909);
+                if (oldString909 instanceof Utf8) {
+                    charSequence909 = (decoder).readString(((Utf8) oldString909));
+                } else {
+                    charSequence909 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, charSequence909);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F909': "+ unionIndex909));
+            }
+        }
+        int unionIndex910 = (decoder.readIndex());
+        if (unionIndex910 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, null);
+        } else {
+            if (unionIndex910 == 1) {
+                Utf8 charSequence910;
+                Object oldString910 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(910);
+                if (oldString910 instanceof Utf8) {
+                    charSequence910 = (decoder).readString(((Utf8) oldString910));
+                } else {
+                    charSequence910 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, charSequence910);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F910': "+ unionIndex910));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex911 = (decoder.readIndex());
+        if (unionIndex911 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, null);
+        } else {
+            if (unionIndex911 == 1) {
+                Utf8 charSequence911;
+                Object oldString911 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(911);
+                if (oldString911 instanceof Utf8) {
+                    charSequence911 = (decoder).readString(((Utf8) oldString911));
+                } else {
+                    charSequence911 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, charSequence911);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F911': "+ unionIndex911));
+            }
+        }
+        int unionIndex912 = (decoder.readIndex());
+        if (unionIndex912 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, null);
+        } else {
+            if (unionIndex912 == 1) {
+                Utf8 charSequence912;
+                Object oldString912 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(912);
+                if (oldString912 instanceof Utf8) {
+                    charSequence912 = (decoder).readString(((Utf8) oldString912));
+                } else {
+                    charSequence912 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, charSequence912);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F912': "+ unionIndex912));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex913 = (decoder.readIndex());
+        if (unionIndex913 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, null);
+        } else {
+            if (unionIndex913 == 1) {
+                Utf8 charSequence913;
+                Object oldString913 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(913);
+                if (oldString913 instanceof Utf8) {
+                    charSequence913 = (decoder).readString(((Utf8) oldString913));
+                } else {
+                    charSequence913 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, charSequence913);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F913': "+ unionIndex913));
+            }
+        }
+        int unionIndex914 = (decoder.readIndex());
+        if (unionIndex914 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, null);
+        } else {
+            if (unionIndex914 == 1) {
+                Utf8 charSequence914;
+                Object oldString914 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(914);
+                if (oldString914 instanceof Utf8) {
+                    charSequence914 = (decoder).readString(((Utf8) oldString914));
+                } else {
+                    charSequence914 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, charSequence914);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F914': "+ unionIndex914));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex915 = (decoder.readIndex());
+        if (unionIndex915 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, null);
+        } else {
+            if (unionIndex915 == 1) {
+                Utf8 charSequence915;
+                Object oldString915 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(915);
+                if (oldString915 instanceof Utf8) {
+                    charSequence915 = (decoder).readString(((Utf8) oldString915));
+                } else {
+                    charSequence915 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, charSequence915);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F915': "+ unionIndex915));
+            }
+        }
+        int unionIndex916 = (decoder.readIndex());
+        if (unionIndex916 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, null);
+        } else {
+            if (unionIndex916 == 1) {
+                Utf8 charSequence916;
+                Object oldString916 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(916);
+                if (oldString916 instanceof Utf8) {
+                    charSequence916 = (decoder).readString(((Utf8) oldString916));
+                } else {
+                    charSequence916 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, charSequence916);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F916': "+ unionIndex916));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex917 = (decoder.readIndex());
+        if (unionIndex917 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, null);
+        } else {
+            if (unionIndex917 == 1) {
+                Utf8 charSequence917;
+                Object oldString917 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(917);
+                if (oldString917 instanceof Utf8) {
+                    charSequence917 = (decoder).readString(((Utf8) oldString917));
+                } else {
+                    charSequence917 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, charSequence917);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F917': "+ unionIndex917));
+            }
+        }
+        int unionIndex918 = (decoder.readIndex());
+        if (unionIndex918 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, null);
+        } else {
+            if (unionIndex918 == 1) {
+                Utf8 charSequence918;
+                Object oldString918 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(918);
+                if (oldString918 instanceof Utf8) {
+                    charSequence918 = (decoder).readString(((Utf8) oldString918));
+                } else {
+                    charSequence918 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, charSequence918);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F918': "+ unionIndex918));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex919 = (decoder.readIndex());
+        if (unionIndex919 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, null);
+        } else {
+            if (unionIndex919 == 1) {
+                Utf8 charSequence919;
+                Object oldString919 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(919);
+                if (oldString919 instanceof Utf8) {
+                    charSequence919 = (decoder).readString(((Utf8) oldString919));
+                } else {
+                    charSequence919 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, charSequence919);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F919': "+ unionIndex919));
+            }
+        }
+        int unionIndex920 = (decoder.readIndex());
+        if (unionIndex920 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, null);
+        } else {
+            if (unionIndex920 == 1) {
+                Utf8 charSequence920;
+                Object oldString920 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(920);
+                if (oldString920 instanceof Utf8) {
+                    charSequence920 = (decoder).readString(((Utf8) oldString920));
+                } else {
+                    charSequence920 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, charSequence920);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F920': "+ unionIndex920));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex921 = (decoder.readIndex());
+        if (unionIndex921 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, null);
+        } else {
+            if (unionIndex921 == 1) {
+                Utf8 charSequence921;
+                Object oldString921 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(921);
+                if (oldString921 instanceof Utf8) {
+                    charSequence921 = (decoder).readString(((Utf8) oldString921));
+                } else {
+                    charSequence921 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, charSequence921);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F921': "+ unionIndex921));
+            }
+        }
+        int unionIndex922 = (decoder.readIndex());
+        if (unionIndex922 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, null);
+        } else {
+            if (unionIndex922 == 1) {
+                Utf8 charSequence922;
+                Object oldString922 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(922);
+                if (oldString922 instanceof Utf8) {
+                    charSequence922 = (decoder).readString(((Utf8) oldString922));
+                } else {
+                    charSequence922 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, charSequence922);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F922': "+ unionIndex922));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex923 = (decoder.readIndex());
+        if (unionIndex923 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, null);
+        } else {
+            if (unionIndex923 == 1) {
+                Utf8 charSequence923;
+                Object oldString923 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(923);
+                if (oldString923 instanceof Utf8) {
+                    charSequence923 = (decoder).readString(((Utf8) oldString923));
+                } else {
+                    charSequence923 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, charSequence923);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F923': "+ unionIndex923));
+            }
+        }
+        int unionIndex924 = (decoder.readIndex());
+        if (unionIndex924 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, null);
+        } else {
+            if (unionIndex924 == 1) {
+                Utf8 charSequence924;
+                Object oldString924 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(924);
+                if (oldString924 instanceof Utf8) {
+                    charSequence924 = (decoder).readString(((Utf8) oldString924));
+                } else {
+                    charSequence924 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, charSequence924);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F924': "+ unionIndex924));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex925 = (decoder.readIndex());
+        if (unionIndex925 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, null);
+        } else {
+            if (unionIndex925 == 1) {
+                Utf8 charSequence925;
+                Object oldString925 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(925);
+                if (oldString925 instanceof Utf8) {
+                    charSequence925 = (decoder).readString(((Utf8) oldString925));
+                } else {
+                    charSequence925 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, charSequence925);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F925': "+ unionIndex925));
+            }
+        }
+        int unionIndex926 = (decoder.readIndex());
+        if (unionIndex926 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, null);
+        } else {
+            if (unionIndex926 == 1) {
+                Utf8 charSequence926;
+                Object oldString926 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(926);
+                if (oldString926 instanceof Utf8) {
+                    charSequence926 = (decoder).readString(((Utf8) oldString926));
+                } else {
+                    charSequence926 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, charSequence926);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F926': "+ unionIndex926));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex927 = (decoder.readIndex());
+        if (unionIndex927 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, null);
+        } else {
+            if (unionIndex927 == 1) {
+                Utf8 charSequence927;
+                Object oldString927 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(927);
+                if (oldString927 instanceof Utf8) {
+                    charSequence927 = (decoder).readString(((Utf8) oldString927));
+                } else {
+                    charSequence927 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, charSequence927);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F927': "+ unionIndex927));
+            }
+        }
+        int unionIndex928 = (decoder.readIndex());
+        if (unionIndex928 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, null);
+        } else {
+            if (unionIndex928 == 1) {
+                Utf8 charSequence928;
+                Object oldString928 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(928);
+                if (oldString928 instanceof Utf8) {
+                    charSequence928 = (decoder).readString(((Utf8) oldString928));
+                } else {
+                    charSequence928 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, charSequence928);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F928': "+ unionIndex928));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex929 = (decoder.readIndex());
+        if (unionIndex929 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, null);
+        } else {
+            if (unionIndex929 == 1) {
+                Utf8 charSequence929;
+                Object oldString929 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(929);
+                if (oldString929 instanceof Utf8) {
+                    charSequence929 = (decoder).readString(((Utf8) oldString929));
+                } else {
+                    charSequence929 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, charSequence929);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F929': "+ unionIndex929));
+            }
+        }
+        int unionIndex930 = (decoder.readIndex());
+        if (unionIndex930 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, null);
+        } else {
+            if (unionIndex930 == 1) {
+                Utf8 charSequence930;
+                Object oldString930 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(930);
+                if (oldString930 instanceof Utf8) {
+                    charSequence930 = (decoder).readString(((Utf8) oldString930));
+                } else {
+                    charSequence930 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, charSequence930);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F930': "+ unionIndex930));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex931 = (decoder.readIndex());
+        if (unionIndex931 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, null);
+        } else {
+            if (unionIndex931 == 1) {
+                Utf8 charSequence931;
+                Object oldString931 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(931);
+                if (oldString931 instanceof Utf8) {
+                    charSequence931 = (decoder).readString(((Utf8) oldString931));
+                } else {
+                    charSequence931 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, charSequence931);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F931': "+ unionIndex931));
+            }
+        }
+        int unionIndex932 = (decoder.readIndex());
+        if (unionIndex932 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, null);
+        } else {
+            if (unionIndex932 == 1) {
+                Utf8 charSequence932;
+                Object oldString932 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(932);
+                if (oldString932 instanceof Utf8) {
+                    charSequence932 = (decoder).readString(((Utf8) oldString932));
+                } else {
+                    charSequence932 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, charSequence932);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F932': "+ unionIndex932));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex933 = (decoder.readIndex());
+        if (unionIndex933 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, null);
+        } else {
+            if (unionIndex933 == 1) {
+                Utf8 charSequence933;
+                Object oldString933 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(933);
+                if (oldString933 instanceof Utf8) {
+                    charSequence933 = (decoder).readString(((Utf8) oldString933));
+                } else {
+                    charSequence933 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, charSequence933);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F933': "+ unionIndex933));
+            }
+        }
+        int unionIndex934 = (decoder.readIndex());
+        if (unionIndex934 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, null);
+        } else {
+            if (unionIndex934 == 1) {
+                Utf8 charSequence934;
+                Object oldString934 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(934);
+                if (oldString934 instanceof Utf8) {
+                    charSequence934 = (decoder).readString(((Utf8) oldString934));
+                } else {
+                    charSequence934 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, charSequence934);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F934': "+ unionIndex934));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex935 = (decoder.readIndex());
+        if (unionIndex935 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, null);
+        } else {
+            if (unionIndex935 == 1) {
+                Utf8 charSequence935;
+                Object oldString935 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(935);
+                if (oldString935 instanceof Utf8) {
+                    charSequence935 = (decoder).readString(((Utf8) oldString935));
+                } else {
+                    charSequence935 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, charSequence935);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F935': "+ unionIndex935));
+            }
+        }
+        int unionIndex936 = (decoder.readIndex());
+        if (unionIndex936 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, null);
+        } else {
+            if (unionIndex936 == 1) {
+                Utf8 charSequence936;
+                Object oldString936 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(936);
+                if (oldString936 instanceof Utf8) {
+                    charSequence936 = (decoder).readString(((Utf8) oldString936));
+                } else {
+                    charSequence936 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, charSequence936);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F936': "+ unionIndex936));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex937 = (decoder.readIndex());
+        if (unionIndex937 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, null);
+        } else {
+            if (unionIndex937 == 1) {
+                Utf8 charSequence937;
+                Object oldString937 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(937);
+                if (oldString937 instanceof Utf8) {
+                    charSequence937 = (decoder).readString(((Utf8) oldString937));
+                } else {
+                    charSequence937 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, charSequence937);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F937': "+ unionIndex937));
+            }
+        }
+        int unionIndex938 = (decoder.readIndex());
+        if (unionIndex938 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, null);
+        } else {
+            if (unionIndex938 == 1) {
+                Utf8 charSequence938;
+                Object oldString938 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(938);
+                if (oldString938 instanceof Utf8) {
+                    charSequence938 = (decoder).readString(((Utf8) oldString938));
+                } else {
+                    charSequence938 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, charSequence938);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F938': "+ unionIndex938));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex939 = (decoder.readIndex());
+        if (unionIndex939 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, null);
+        } else {
+            if (unionIndex939 == 1) {
+                Utf8 charSequence939;
+                Object oldString939 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(939);
+                if (oldString939 instanceof Utf8) {
+                    charSequence939 = (decoder).readString(((Utf8) oldString939));
+                } else {
+                    charSequence939 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, charSequence939);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F939': "+ unionIndex939));
+            }
+        }
+        int unionIndex940 = (decoder.readIndex());
+        if (unionIndex940 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, null);
+        } else {
+            if (unionIndex940 == 1) {
+                Utf8 charSequence940;
+                Object oldString940 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(940);
+                if (oldString940 instanceof Utf8) {
+                    charSequence940 = (decoder).readString(((Utf8) oldString940));
+                } else {
+                    charSequence940 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, charSequence940);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F940': "+ unionIndex940));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex941 = (decoder.readIndex());
+        if (unionIndex941 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, null);
+        } else {
+            if (unionIndex941 == 1) {
+                Utf8 charSequence941;
+                Object oldString941 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(941);
+                if (oldString941 instanceof Utf8) {
+                    charSequence941 = (decoder).readString(((Utf8) oldString941));
+                } else {
+                    charSequence941 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, charSequence941);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F941': "+ unionIndex941));
+            }
+        }
+        int unionIndex942 = (decoder.readIndex());
+        if (unionIndex942 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, null);
+        } else {
+            if (unionIndex942 == 1) {
+                Utf8 charSequence942;
+                Object oldString942 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(942);
+                if (oldString942 instanceof Utf8) {
+                    charSequence942 = (decoder).readString(((Utf8) oldString942));
+                } else {
+                    charSequence942 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, charSequence942);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F942': "+ unionIndex942));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex943 = (decoder.readIndex());
+        if (unionIndex943 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, null);
+        } else {
+            if (unionIndex943 == 1) {
+                Utf8 charSequence943;
+                Object oldString943 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(943);
+                if (oldString943 instanceof Utf8) {
+                    charSequence943 = (decoder).readString(((Utf8) oldString943));
+                } else {
+                    charSequence943 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, charSequence943);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F943': "+ unionIndex943));
+            }
+        }
+        int unionIndex944 = (decoder.readIndex());
+        if (unionIndex944 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, null);
+        } else {
+            if (unionIndex944 == 1) {
+                Utf8 charSequence944;
+                Object oldString944 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(944);
+                if (oldString944 instanceof Utf8) {
+                    charSequence944 = (decoder).readString(((Utf8) oldString944));
+                } else {
+                    charSequence944 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, charSequence944);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F944': "+ unionIndex944));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex945 = (decoder.readIndex());
+        if (unionIndex945 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, null);
+        } else {
+            if (unionIndex945 == 1) {
+                Utf8 charSequence945;
+                Object oldString945 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(945);
+                if (oldString945 instanceof Utf8) {
+                    charSequence945 = (decoder).readString(((Utf8) oldString945));
+                } else {
+                    charSequence945 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, charSequence945);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F945': "+ unionIndex945));
+            }
+        }
+        int unionIndex946 = (decoder.readIndex());
+        if (unionIndex946 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, null);
+        } else {
+            if (unionIndex946 == 1) {
+                Utf8 charSequence946;
+                Object oldString946 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(946);
+                if (oldString946 instanceof Utf8) {
+                    charSequence946 = (decoder).readString(((Utf8) oldString946));
+                } else {
+                    charSequence946 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, charSequence946);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F946': "+ unionIndex946));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex947 = (decoder.readIndex());
+        if (unionIndex947 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, null);
+        } else {
+            if (unionIndex947 == 1) {
+                Utf8 charSequence947;
+                Object oldString947 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(947);
+                if (oldString947 instanceof Utf8) {
+                    charSequence947 = (decoder).readString(((Utf8) oldString947));
+                } else {
+                    charSequence947 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, charSequence947);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F947': "+ unionIndex947));
+            }
+        }
+        int unionIndex948 = (decoder.readIndex());
+        if (unionIndex948 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, null);
+        } else {
+            if (unionIndex948 == 1) {
+                Utf8 charSequence948;
+                Object oldString948 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(948);
+                if (oldString948 instanceof Utf8) {
+                    charSequence948 = (decoder).readString(((Utf8) oldString948));
+                } else {
+                    charSequence948 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, charSequence948);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F948': "+ unionIndex948));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex949 = (decoder.readIndex());
+        if (unionIndex949 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, null);
+        } else {
+            if (unionIndex949 == 1) {
+                Utf8 charSequence949;
+                Object oldString949 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(949);
+                if (oldString949 instanceof Utf8) {
+                    charSequence949 = (decoder).readString(((Utf8) oldString949));
+                } else {
+                    charSequence949 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, charSequence949);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F949': "+ unionIndex949));
+            }
+        }
+        int unionIndex950 = (decoder.readIndex());
+        if (unionIndex950 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, null);
+        } else {
+            if (unionIndex950 == 1) {
+                Utf8 charSequence950;
+                Object oldString950 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(950);
+                if (oldString950 instanceof Utf8) {
+                    charSequence950 = (decoder).readString(((Utf8) oldString950));
+                } else {
+                    charSequence950 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, charSequence950);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F950': "+ unionIndex950));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex951 = (decoder.readIndex());
+        if (unionIndex951 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, null);
+        } else {
+            if (unionIndex951 == 1) {
+                Utf8 charSequence951;
+                Object oldString951 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(951);
+                if (oldString951 instanceof Utf8) {
+                    charSequence951 = (decoder).readString(((Utf8) oldString951));
+                } else {
+                    charSequence951 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, charSequence951);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F951': "+ unionIndex951));
+            }
+        }
+        int unionIndex952 = (decoder.readIndex());
+        if (unionIndex952 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, null);
+        } else {
+            if (unionIndex952 == 1) {
+                Utf8 charSequence952;
+                Object oldString952 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(952);
+                if (oldString952 instanceof Utf8) {
+                    charSequence952 = (decoder).readString(((Utf8) oldString952));
+                } else {
+                    charSequence952 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, charSequence952);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F952': "+ unionIndex952));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex953 = (decoder.readIndex());
+        if (unionIndex953 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, null);
+        } else {
+            if (unionIndex953 == 1) {
+                Utf8 charSequence953;
+                Object oldString953 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(953);
+                if (oldString953 instanceof Utf8) {
+                    charSequence953 = (decoder).readString(((Utf8) oldString953));
+                } else {
+                    charSequence953 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, charSequence953);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F953': "+ unionIndex953));
+            }
+        }
+        int unionIndex954 = (decoder.readIndex());
+        if (unionIndex954 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, null);
+        } else {
+            if (unionIndex954 == 1) {
+                Utf8 charSequence954;
+                Object oldString954 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(954);
+                if (oldString954 instanceof Utf8) {
+                    charSequence954 = (decoder).readString(((Utf8) oldString954));
+                } else {
+                    charSequence954 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, charSequence954);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F954': "+ unionIndex954));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex955 = (decoder.readIndex());
+        if (unionIndex955 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, null);
+        } else {
+            if (unionIndex955 == 1) {
+                Utf8 charSequence955;
+                Object oldString955 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(955);
+                if (oldString955 instanceof Utf8) {
+                    charSequence955 = (decoder).readString(((Utf8) oldString955));
+                } else {
+                    charSequence955 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, charSequence955);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F955': "+ unionIndex955));
+            }
+        }
+        int unionIndex956 = (decoder.readIndex());
+        if (unionIndex956 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, null);
+        } else {
+            if (unionIndex956 == 1) {
+                Utf8 charSequence956;
+                Object oldString956 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(956);
+                if (oldString956 instanceof Utf8) {
+                    charSequence956 = (decoder).readString(((Utf8) oldString956));
+                } else {
+                    charSequence956 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, charSequence956);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F956': "+ unionIndex956));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex957 = (decoder.readIndex());
+        if (unionIndex957 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, null);
+        } else {
+            if (unionIndex957 == 1) {
+                Utf8 charSequence957;
+                Object oldString957 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(957);
+                if (oldString957 instanceof Utf8) {
+                    charSequence957 = (decoder).readString(((Utf8) oldString957));
+                } else {
+                    charSequence957 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, charSequence957);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F957': "+ unionIndex957));
+            }
+        }
+        int unionIndex958 = (decoder.readIndex());
+        if (unionIndex958 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, null);
+        } else {
+            if (unionIndex958 == 1) {
+                Utf8 charSequence958;
+                Object oldString958 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(958);
+                if (oldString958 instanceof Utf8) {
+                    charSequence958 = (decoder).readString(((Utf8) oldString958));
+                } else {
+                    charSequence958 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, charSequence958);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F958': "+ unionIndex958));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex959 = (decoder.readIndex());
+        if (unionIndex959 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, null);
+        } else {
+            if (unionIndex959 == 1) {
+                Utf8 charSequence959;
+                Object oldString959 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(959);
+                if (oldString959 instanceof Utf8) {
+                    charSequence959 = (decoder).readString(((Utf8) oldString959));
+                } else {
+                    charSequence959 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, charSequence959);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F959': "+ unionIndex959));
+            }
+        }
+        int unionIndex960 = (decoder.readIndex());
+        if (unionIndex960 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, null);
+        } else {
+            if (unionIndex960 == 1) {
+                Utf8 charSequence960;
+                Object oldString960 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(960);
+                if (oldString960 instanceof Utf8) {
+                    charSequence960 = (decoder).readString(((Utf8) oldString960));
+                } else {
+                    charSequence960 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, charSequence960);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F960': "+ unionIndex960));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex961 = (decoder.readIndex());
+        if (unionIndex961 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, null);
+        } else {
+            if (unionIndex961 == 1) {
+                Utf8 charSequence961;
+                Object oldString961 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(961);
+                if (oldString961 instanceof Utf8) {
+                    charSequence961 = (decoder).readString(((Utf8) oldString961));
+                } else {
+                    charSequence961 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, charSequence961);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F961': "+ unionIndex961));
+            }
+        }
+        int unionIndex962 = (decoder.readIndex());
+        if (unionIndex962 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, null);
+        } else {
+            if (unionIndex962 == 1) {
+                Utf8 charSequence962;
+                Object oldString962 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(962);
+                if (oldString962 instanceof Utf8) {
+                    charSequence962 = (decoder).readString(((Utf8) oldString962));
+                } else {
+                    charSequence962 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, charSequence962);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F962': "+ unionIndex962));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex963 = (decoder.readIndex());
+        if (unionIndex963 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, null);
+        } else {
+            if (unionIndex963 == 1) {
+                Utf8 charSequence963;
+                Object oldString963 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(963);
+                if (oldString963 instanceof Utf8) {
+                    charSequence963 = (decoder).readString(((Utf8) oldString963));
+                } else {
+                    charSequence963 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, charSequence963);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F963': "+ unionIndex963));
+            }
+        }
+        int unionIndex964 = (decoder.readIndex());
+        if (unionIndex964 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, null);
+        } else {
+            if (unionIndex964 == 1) {
+                Utf8 charSequence964;
+                Object oldString964 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(964);
+                if (oldString964 instanceof Utf8) {
+                    charSequence964 = (decoder).readString(((Utf8) oldString964));
+                } else {
+                    charSequence964 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, charSequence964);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F964': "+ unionIndex964));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex965 = (decoder.readIndex());
+        if (unionIndex965 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, null);
+        } else {
+            if (unionIndex965 == 1) {
+                Utf8 charSequence965;
+                Object oldString965 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(965);
+                if (oldString965 instanceof Utf8) {
+                    charSequence965 = (decoder).readString(((Utf8) oldString965));
+                } else {
+                    charSequence965 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, charSequence965);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F965': "+ unionIndex965));
+            }
+        }
+        int unionIndex966 = (decoder.readIndex());
+        if (unionIndex966 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, null);
+        } else {
+            if (unionIndex966 == 1) {
+                Utf8 charSequence966;
+                Object oldString966 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(966);
+                if (oldString966 instanceof Utf8) {
+                    charSequence966 = (decoder).readString(((Utf8) oldString966));
+                } else {
+                    charSequence966 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, charSequence966);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F966': "+ unionIndex966));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex967 = (decoder.readIndex());
+        if (unionIndex967 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, null);
+        } else {
+            if (unionIndex967 == 1) {
+                Utf8 charSequence967;
+                Object oldString967 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(967);
+                if (oldString967 instanceof Utf8) {
+                    charSequence967 = (decoder).readString(((Utf8) oldString967));
+                } else {
+                    charSequence967 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, charSequence967);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F967': "+ unionIndex967));
+            }
+        }
+        int unionIndex968 = (decoder.readIndex());
+        if (unionIndex968 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, null);
+        } else {
+            if (unionIndex968 == 1) {
+                Utf8 charSequence968;
+                Object oldString968 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(968);
+                if (oldString968 instanceof Utf8) {
+                    charSequence968 = (decoder).readString(((Utf8) oldString968));
+                } else {
+                    charSequence968 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, charSequence968);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F968': "+ unionIndex968));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex969 = (decoder.readIndex());
+        if (unionIndex969 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, null);
+        } else {
+            if (unionIndex969 == 1) {
+                Utf8 charSequence969;
+                Object oldString969 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(969);
+                if (oldString969 instanceof Utf8) {
+                    charSequence969 = (decoder).readString(((Utf8) oldString969));
+                } else {
+                    charSequence969 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, charSequence969);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F969': "+ unionIndex969));
+            }
+        }
+        int unionIndex970 = (decoder.readIndex());
+        if (unionIndex970 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, null);
+        } else {
+            if (unionIndex970 == 1) {
+                Utf8 charSequence970;
+                Object oldString970 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(970);
+                if (oldString970 instanceof Utf8) {
+                    charSequence970 = (decoder).readString(((Utf8) oldString970));
+                } else {
+                    charSequence970 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, charSequence970);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F970': "+ unionIndex970));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex971 = (decoder.readIndex());
+        if (unionIndex971 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, null);
+        } else {
+            if (unionIndex971 == 1) {
+                Utf8 charSequence971;
+                Object oldString971 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(971);
+                if (oldString971 instanceof Utf8) {
+                    charSequence971 = (decoder).readString(((Utf8) oldString971));
+                } else {
+                    charSequence971 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, charSequence971);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F971': "+ unionIndex971));
+            }
+        }
+        int unionIndex972 = (decoder.readIndex());
+        if (unionIndex972 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, null);
+        } else {
+            if (unionIndex972 == 1) {
+                Utf8 charSequence972;
+                Object oldString972 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(972);
+                if (oldString972 instanceof Utf8) {
+                    charSequence972 = (decoder).readString(((Utf8) oldString972));
+                } else {
+                    charSequence972 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, charSequence972);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F972': "+ unionIndex972));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex973 = (decoder.readIndex());
+        if (unionIndex973 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, null);
+        } else {
+            if (unionIndex973 == 1) {
+                Utf8 charSequence973;
+                Object oldString973 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(973);
+                if (oldString973 instanceof Utf8) {
+                    charSequence973 = (decoder).readString(((Utf8) oldString973));
+                } else {
+                    charSequence973 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, charSequence973);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F973': "+ unionIndex973));
+            }
+        }
+        int unionIndex974 = (decoder.readIndex());
+        if (unionIndex974 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, null);
+        } else {
+            if (unionIndex974 == 1) {
+                Utf8 charSequence974;
+                Object oldString974 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(974);
+                if (oldString974 instanceof Utf8) {
+                    charSequence974 = (decoder).readString(((Utf8) oldString974));
+                } else {
+                    charSequence974 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, charSequence974);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F974': "+ unionIndex974));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex975 = (decoder.readIndex());
+        if (unionIndex975 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, null);
+        } else {
+            if (unionIndex975 == 1) {
+                Utf8 charSequence975;
+                Object oldString975 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(975);
+                if (oldString975 instanceof Utf8) {
+                    charSequence975 = (decoder).readString(((Utf8) oldString975));
+                } else {
+                    charSequence975 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, charSequence975);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F975': "+ unionIndex975));
+            }
+        }
+        int unionIndex976 = (decoder.readIndex());
+        if (unionIndex976 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, null);
+        } else {
+            if (unionIndex976 == 1) {
+                Utf8 charSequence976;
+                Object oldString976 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(976);
+                if (oldString976 instanceof Utf8) {
+                    charSequence976 = (decoder).readString(((Utf8) oldString976));
+                } else {
+                    charSequence976 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, charSequence976);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F976': "+ unionIndex976));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex977 = (decoder.readIndex());
+        if (unionIndex977 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, null);
+        } else {
+            if (unionIndex977 == 1) {
+                Utf8 charSequence977;
+                Object oldString977 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(977);
+                if (oldString977 instanceof Utf8) {
+                    charSequence977 = (decoder).readString(((Utf8) oldString977));
+                } else {
+                    charSequence977 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, charSequence977);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F977': "+ unionIndex977));
+            }
+        }
+        int unionIndex978 = (decoder.readIndex());
+        if (unionIndex978 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, null);
+        } else {
+            if (unionIndex978 == 1) {
+                Utf8 charSequence978;
+                Object oldString978 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(978);
+                if (oldString978 instanceof Utf8) {
+                    charSequence978 = (decoder).readString(((Utf8) oldString978));
+                } else {
+                    charSequence978 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, charSequence978);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F978': "+ unionIndex978));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex979 = (decoder.readIndex());
+        if (unionIndex979 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, null);
+        } else {
+            if (unionIndex979 == 1) {
+                Utf8 charSequence979;
+                Object oldString979 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(979);
+                if (oldString979 instanceof Utf8) {
+                    charSequence979 = (decoder).readString(((Utf8) oldString979));
+                } else {
+                    charSequence979 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, charSequence979);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F979': "+ unionIndex979));
+            }
+        }
+        int unionIndex980 = (decoder.readIndex());
+        if (unionIndex980 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, null);
+        } else {
+            if (unionIndex980 == 1) {
+                Utf8 charSequence980;
+                Object oldString980 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(980);
+                if (oldString980 instanceof Utf8) {
+                    charSequence980 = (decoder).readString(((Utf8) oldString980));
+                } else {
+                    charSequence980 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, charSequence980);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F980': "+ unionIndex980));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex981 = (decoder.readIndex());
+        if (unionIndex981 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, null);
+        } else {
+            if (unionIndex981 == 1) {
+                Utf8 charSequence981;
+                Object oldString981 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(981);
+                if (oldString981 instanceof Utf8) {
+                    charSequence981 = (decoder).readString(((Utf8) oldString981));
+                } else {
+                    charSequence981 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, charSequence981);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F981': "+ unionIndex981));
+            }
+        }
+        int unionIndex982 = (decoder.readIndex());
+        if (unionIndex982 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, null);
+        } else {
+            if (unionIndex982 == 1) {
+                Utf8 charSequence982;
+                Object oldString982 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(982);
+                if (oldString982 instanceof Utf8) {
+                    charSequence982 = (decoder).readString(((Utf8) oldString982));
+                } else {
+                    charSequence982 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, charSequence982);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F982': "+ unionIndex982));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex983 = (decoder.readIndex());
+        if (unionIndex983 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, null);
+        } else {
+            if (unionIndex983 == 1) {
+                Utf8 charSequence983;
+                Object oldString983 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(983);
+                if (oldString983 instanceof Utf8) {
+                    charSequence983 = (decoder).readString(((Utf8) oldString983));
+                } else {
+                    charSequence983 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, charSequence983);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F983': "+ unionIndex983));
+            }
+        }
+        int unionIndex984 = (decoder.readIndex());
+        if (unionIndex984 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, null);
+        } else {
+            if (unionIndex984 == 1) {
+                Utf8 charSequence984;
+                Object oldString984 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(984);
+                if (oldString984 instanceof Utf8) {
+                    charSequence984 = (decoder).readString(((Utf8) oldString984));
+                } else {
+                    charSequence984 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, charSequence984);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F984': "+ unionIndex984));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex985 = (decoder.readIndex());
+        if (unionIndex985 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, null);
+        } else {
+            if (unionIndex985 == 1) {
+                Utf8 charSequence985;
+                Object oldString985 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(985);
+                if (oldString985 instanceof Utf8) {
+                    charSequence985 = (decoder).readString(((Utf8) oldString985));
+                } else {
+                    charSequence985 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, charSequence985);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F985': "+ unionIndex985));
+            }
+        }
+        int unionIndex986 = (decoder.readIndex());
+        if (unionIndex986 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, null);
+        } else {
+            if (unionIndex986 == 1) {
+                Utf8 charSequence986;
+                Object oldString986 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(986);
+                if (oldString986 instanceof Utf8) {
+                    charSequence986 = (decoder).readString(((Utf8) oldString986));
+                } else {
+                    charSequence986 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, charSequence986);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F986': "+ unionIndex986));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex987 = (decoder.readIndex());
+        if (unionIndex987 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, null);
+        } else {
+            if (unionIndex987 == 1) {
+                Utf8 charSequence987;
+                Object oldString987 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(987);
+                if (oldString987 instanceof Utf8) {
+                    charSequence987 = (decoder).readString(((Utf8) oldString987));
+                } else {
+                    charSequence987 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, charSequence987);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F987': "+ unionIndex987));
+            }
+        }
+        int unionIndex988 = (decoder.readIndex());
+        if (unionIndex988 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, null);
+        } else {
+            if (unionIndex988 == 1) {
+                Utf8 charSequence988;
+                Object oldString988 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(988);
+                if (oldString988 instanceof Utf8) {
+                    charSequence988 = (decoder).readString(((Utf8) oldString988));
+                } else {
+                    charSequence988 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, charSequence988);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F988': "+ unionIndex988));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex989 = (decoder.readIndex());
+        if (unionIndex989 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, null);
+        } else {
+            if (unionIndex989 == 1) {
+                Utf8 charSequence989;
+                Object oldString989 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(989);
+                if (oldString989 instanceof Utf8) {
+                    charSequence989 = (decoder).readString(((Utf8) oldString989));
+                } else {
+                    charSequence989 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, charSequence989);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F989': "+ unionIndex989));
+            }
+        }
+        int unionIndex990 = (decoder.readIndex());
+        if (unionIndex990 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, null);
+        } else {
+            if (unionIndex990 == 1) {
+                Utf8 charSequence990;
+                Object oldString990 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(990);
+                if (oldString990 instanceof Utf8) {
+                    charSequence990 = (decoder).readString(((Utf8) oldString990));
+                } else {
+                    charSequence990 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, charSequence990);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F990': "+ unionIndex990));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex991 = (decoder.readIndex());
+        if (unionIndex991 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, null);
+        } else {
+            if (unionIndex991 == 1) {
+                Utf8 charSequence991;
+                Object oldString991 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(991);
+                if (oldString991 instanceof Utf8) {
+                    charSequence991 = (decoder).readString(((Utf8) oldString991));
+                } else {
+                    charSequence991 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, charSequence991);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F991': "+ unionIndex991));
+            }
+        }
+        int unionIndex992 = (decoder.readIndex());
+        if (unionIndex992 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, null);
+        } else {
+            if (unionIndex992 == 1) {
+                Utf8 charSequence992;
+                Object oldString992 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(992);
+                if (oldString992 instanceof Utf8) {
+                    charSequence992 = (decoder).readString(((Utf8) oldString992));
+                } else {
+                    charSequence992 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, charSequence992);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F992': "+ unionIndex992));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex993 = (decoder.readIndex());
+        if (unionIndex993 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, null);
+        } else {
+            if (unionIndex993 == 1) {
+                Utf8 charSequence993;
+                Object oldString993 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(993);
+                if (oldString993 instanceof Utf8) {
+                    charSequence993 = (decoder).readString(((Utf8) oldString993));
+                } else {
+                    charSequence993 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, charSequence993);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F993': "+ unionIndex993));
+            }
+        }
+        int unionIndex994 = (decoder.readIndex());
+        if (unionIndex994 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, null);
+        } else {
+            if (unionIndex994 == 1) {
+                Utf8 charSequence994;
+                Object oldString994 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(994);
+                if (oldString994 instanceof Utf8) {
+                    charSequence994 = (decoder).readString(((Utf8) oldString994));
+                } else {
+                    charSequence994 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, charSequence994);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F994': "+ unionIndex994));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex995 = (decoder.readIndex());
+        if (unionIndex995 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, null);
+        } else {
+            if (unionIndex995 == 1) {
+                Utf8 charSequence995;
+                Object oldString995 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(995);
+                if (oldString995 instanceof Utf8) {
+                    charSequence995 = (decoder).readString(((Utf8) oldString995));
+                } else {
+                    charSequence995 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, charSequence995);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F995': "+ unionIndex995));
+            }
+        }
+        int unionIndex996 = (decoder.readIndex());
+        if (unionIndex996 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, null);
+        } else {
+            if (unionIndex996 == 1) {
+                Utf8 charSequence996;
+                Object oldString996 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(996);
+                if (oldString996 instanceof Utf8) {
+                    charSequence996 = (decoder).readString(((Utf8) oldString996));
+                } else {
+                    charSequence996 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, charSequence996);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F996': "+ unionIndex996));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex997 = (decoder.readIndex());
+        if (unionIndex997 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, null);
+        } else {
+            if (unionIndex997 == 1) {
+                Utf8 charSequence997;
+                Object oldString997 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(997);
+                if (oldString997 instanceof Utf8) {
+                    charSequence997 = (decoder).readString(((Utf8) oldString997));
+                } else {
+                    charSequence997 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, charSequence997);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F997': "+ unionIndex997));
+            }
+        }
+        int unionIndex998 = (decoder.readIndex());
+        if (unionIndex998 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, null);
+        } else {
+            if (unionIndex998 == 1) {
+                Utf8 charSequence998;
+                Object oldString998 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(998);
+                if (oldString998 instanceof Utf8) {
+                    charSequence998 = (decoder).readString(((Utf8) oldString998));
+                } else {
+                    charSequence998 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, charSequence998);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F998': "+ unionIndex998));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex999 = (decoder.readIndex());
+        if (unionIndex999 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, null);
+        } else {
+            if (unionIndex999 == 1) {
+                Utf8 charSequence999;
+                Object oldString999 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(999);
+                if (oldString999 instanceof Utf8) {
+                    charSequence999 = (decoder).readString(((Utf8) oldString999));
+                } else {
+                    charSequence999 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, charSequence999);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F999': "+ unionIndex999));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
new file mode 100644
index 000000000..87ddf1dc8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testString0;
+    private final Schema testStringUnionAlias0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testString0 = readerSchema.getField("testString").schema();
+        this.testStringUnionAlias0 = readerSchema.getField("testStringUnionAlias").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testString': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0((FastGenericDeserializerGeneratorTest_shouldReadAliasedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnionAlias': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
new file mode 100644
index 000000000..4c0c0d382
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
@@ -0,0 +1,122 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Schema testEnumUnion0;
+    private final Schema testEnumArray0;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(0, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                testEnumArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        testEnumUnionArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
new file mode 100644
index 000000000..e52063027
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testFixed0;
+    private final Schema testFixedUnion0;
+    private final Schema testFixedArray0;
+    private final Schema testFixedUnionArray0;
+    private final Schema testFixedUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testFixed0 = readerSchema.getField("testFixed").schema();
+        this.testFixedUnion0 = readerSchema.getField("testFixedUnion").schema();
+        this.testFixedArray0 = readerSchema.getField("testFixedArray").schema();
+        this.testFixedUnionArray0 = readerSchema.getField("testFixedUnionArray").schema();
+        this.testFixedUnionArrayArrayElemSchema0 = testFixedUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        byte[] testFixed1;
+        Object oldFixed0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(0);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (2))) {
+            testFixed1 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed1 = ( new byte[2]);
+        }
+        decoder.readFixed(testFixed1);
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(0, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed1));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadFixed;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(1);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (2))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed2);
+                FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed2));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericFixed> testFixedArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(2);
+        if (oldArray0 instanceof List) {
+            testFixedArray1 = ((List) oldArray0);
+            testFixedArray1 .clear();
+        } else {
+            testFixedArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen0), testFixedArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed3;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (2))) {
+                    testFixed3 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed3 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed3);
+                testFixedArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed3));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(2, testFixedArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(3);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray1 = ((List) oldArray1);
+            testFixedUnionArray1 .clear();
+        } else {
+            testFixedUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen1), testFixedUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        byte[] testFixed4;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (2))) {
+                            testFixed4 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed4 = ( new byte[2]);
+                        }
+                        decoder.readFixed(testFixed4);
+                        testFixedUnionArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed4));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(3, testFixedUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
new file mode 100644
index 000000000..ee71141de
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
@@ -0,0 +1,102 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema union0;
+    private final Schema unionOptionSchema0;
+    private final Schema subField0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.union0 = readerSchema.getField("union").schema();
+        this.unionOptionSchema0 = union0 .getTypes().get(1);
+        this.subField0 = unionOptionSchema0 .getField("subField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence1;
+                    Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0);
+                    if (oldString1 instanceof Utf8) {
+                        charSequence1 = (decoder).readString(((Utf8) oldString1));
+                    } else {
+                        charSequence1 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, charSequence1);
+                } else {
+                    if (unionIndex0 == 3) {
+                        FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+                    }
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(unionOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
new file mode 100644
index 000000000..5ad3bab08
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
@@ -0,0 +1,129 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapField0;
+    private final Schema mapFieldMapValueSchema0;
+    private final Schema mapFieldValueMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapField0 = readerSchema.getField("mapField").schema();
+        this.mapFieldMapValueSchema0 = mapField0 .getValueType();
+        this.mapFieldValueMapValueSchema0 = mapFieldMapValueSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Map<Utf8, List<Integer>>> mapField1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
+                if (oldMap0 instanceof Map) {
+                    mapFieldReuse0 = ((Map) oldMap0);
+                }
+                if (mapFieldReuse0 != (null)) {
+                    mapFieldReuse0 .clear();
+                    mapField1 = mapFieldReuse0;
+                } else {
+                    mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Map<Utf8, List<Integer>> mapFieldValue0 = null;
+                    long chunkLen1 = (decoder.readMapStart());
+                    if (chunkLen1 > 0) {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, ((int) chunkLen1)));
+                        } else {
+                            Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
+                            if (null instanceof Map) {
+                                mapFieldValueReuse0 = ((Map) null);
+                            }
+                            if (mapFieldValueReuse0 != (null)) {
+                                mapFieldValueReuse0 .clear();
+                                mapFieldValue0 = mapFieldValueReuse0;
+                            } else {
+                                mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                            }
+                        }
+                        do {
+                            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                                Utf8 key1 = (decoder.readString(null));
+                                PrimitiveIntList mapFieldValueValue0 = null;
+                                long chunkLen2 = (decoder.readArrayStart());
+                                if (null instanceof PrimitiveIntList) {
+                                    mapFieldValueValue0 = ((PrimitiveIntList) null);
+                                    mapFieldValueValue0 .clear();
+                                } else {
+                                    mapFieldValueValue0 = new PrimitiveIntArrayList(((int) chunkLen2));
+                                }
+                                while (chunkLen2 > 0) {
+                                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                                        mapFieldValueValue0 .addPrimitive((decoder.readInt()));
+                                    }
+                                    chunkLen2 = (decoder.arrayNext());
+                                }
+                                mapFieldValue0 .put(key1, mapFieldValueValue0);
+                            }
+                            chunkLen1 = (decoder.mapNext());
+                        } while (chunkLen1 > 0);
+                    } else {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, 0));
+                        } else {
+                            mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+                        }
+                    }
+                    mapField1 .put(key0, mapFieldValue0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), 0));
+            } else {
+                mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadNestedMap.put(0, mapField1);
+        return FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
new file mode 100644
index 000000000..2ea455f6d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
@@ -0,0 +1,206 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(1));
+        tempEnumMapping0 .put(new Integer(1), new Integer(0));
+        tempEnumMapping0 .put(new Integer(2), new Integer(4));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(1));
+        tempEnumMapping1 .put(new Integer(1), new Integer(0));
+        tempEnumMapping1 .put(new Integer(2), new Integer(4));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(1));
+        tempEnumMapping2 .put(new Integer(1), new Integer(0));
+        tempEnumMapping2 .put(new Integer(2), new Integer(4));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(1));
+        tempEnumMapping3 .put(new Integer(1), new Integer(0));
+        tempEnumMapping3 .put(new Integer(2), new Integer(4));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
new file mode 100644
index 000000000..d66baa803
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
@@ -0,0 +1,209 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testIntUnion0;
+    private final Schema testStringUnion0;
+    private final Schema testLongUnion0;
+    private final Schema testDoubleUnion0;
+    private final Schema testFloatUnion0;
+    private final Schema testBooleanUnion0;
+    private final Schema testBytesUnion0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testIntUnion0 = readerSchema.getField("testIntUnion").schema();
+        this.testStringUnion0 = readerSchema.getField("testStringUnion").schema();
+        this.testLongUnion0 = readerSchema.getField("testLongUnion").schema();
+        this.testDoubleUnion0 = readerSchema.getField("testDoubleUnion").schema();
+        this.testFloatUnion0 = readerSchema.getField("testFloatUnion").schema();
+        this.testBooleanUnion0 = readerSchema.getField("testBooleanUnion").schema();
+        this.testBytesUnion0 = readerSchema.getField("testBytesUnion").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(0, (decoder.readInt()));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(2);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(2, charSequence0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(3);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex1));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(4, (decoder.readLong()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(6, (decoder.readDouble()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(8, (decoder.readFloat()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(10, (decoder.readBoolean()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(12);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(12, byteBuffer0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(13);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
new file mode 100644
index 000000000..32af4443d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
@@ -0,0 +1,160 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema intFieldField0;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.intFieldField0 = record10 .getField("intField").schema();
+        this.intField0 = record10 .getField("intField").schema();
+        this.subField1 = record10 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        subRecord.put(0, null);
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                subRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex1));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = subRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
new file mode 100644
index 000000000..901992ac8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
@@ -0,0 +1,175 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema record20;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.record20 = readerSchema.getField("record2").schema();
+        this.intField0 = record20 .getField("intField").schema();
+        this.subField1 = record20 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex0));
+            }
+        }
+        populate_aliasedSubRecord0((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = aliasedSubRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record20)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record20);
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                aliasedSubRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex2));
+            }
+        }
+        populate_aliasedSubRecord1((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord1(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = aliasedSubRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
new file mode 100644
index 000000000..fb6abdb9c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArray0;
+    private final Schema recordsArrayArrayElemSchema0;
+    private final Schema subField0;
+    private final Schema recordsMap0;
+    private final Schema recordsArrayUnion0;
+    private final Schema recordsArrayUnionOptionSchema0;
+    private final Schema recordsArrayUnionOptionArrayElemSchema0;
+    private final Schema recordsMapUnion0;
+    private final Schema recordsMapUnionOptionSchema0;
+    private final Schema recordsMapUnionOptionMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArray0 = readerSchema.getField("recordsArray").schema();
+        this.recordsArrayArrayElemSchema0 = recordsArray0 .getElementType();
+        this.subField0 = recordsArrayArrayElemSchema0 .getField("subField").schema();
+        this.recordsMap0 = readerSchema.getField("recordsMap").schema();
+        this.recordsArrayUnion0 = readerSchema.getField("recordsArrayUnion").schema();
+        this.recordsArrayUnionOptionSchema0 = recordsArrayUnion0 .getTypes().get(1);
+        this.recordsArrayUnionOptionArrayElemSchema0 = recordsArrayUnionOptionSchema0 .getElementType();
+        this.recordsMapUnion0 = readerSchema.getField("recordsMapUnion").schema();
+        this.recordsMapUnionOptionSchema0 = recordsMapUnion0 .getTypes().get(1);
+        this.recordsMapUnionOptionMapValueSchema0 = recordsMapUnionOptionSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<IndexedRecord> recordsArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArray1 = ((List) oldArray0);
+            recordsArray1 .clear();
+        } else {
+            recordsArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordsArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(0, recordsArray1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayArrayElemSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> recordsMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap1 = recordsMapReuse0;
+                } else {
+                    recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), 0));
+            } else {
+                recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(1, recordsMap1);
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, null);
+        } else {
+            if (unionIndex1 == 1) {
+                List<IndexedRecord> recordsArrayUnionOption0 = null;
+                long chunkLen2 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray1);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen2), recordsArrayUnionOptionSchema0);
+                }
+                while (chunkLen2 > 0) {
+                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        int unionIndex2 = (decoder.readIndex());
+                        if (unionIndex2 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex2 == 1) {
+                                recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex2));
+                            }
+                        }
+                    }
+                    chunkLen2 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Map<Utf8, IndexedRecord> recordsMapUnionOption0 = null;
+                long chunkLen3 = (decoder.readMapStart());
+                if (chunkLen3 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), ((int) chunkLen3)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex4 = (decoder.readIndex());
+                            if (unionIndex4 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex4 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex4));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.mapNext());
+                    } while (chunkLen3 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
new file mode 100644
index 000000000..6b47ada2c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
@@ -0,0 +1,378 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArrayMap0;
+    private final Schema recordsArrayMapArrayElemSchema0;
+    private final Schema recordsArrayMapElemMapValueSchema0;
+    private final Schema recordsArrayMapElemValueOptionSchema0;
+    private final Schema subField0;
+    private final Schema recordsMapArray0;
+    private final Schema recordsMapArrayMapValueSchema0;
+    private final Schema recordsMapArrayValueArrayElemSchema0;
+    private final Schema recordsArrayMapUnion0;
+    private final Schema recordsArrayMapUnionOptionArrayElemSchema0;
+    private final Schema recordsArrayMapUnionOptionElemMapValueSchema0;
+    private final Schema recordsMapArrayUnion0;
+    private final Schema recordsMapArrayUnionOptionSchema0;
+    private final Schema recordsMapArrayUnionOptionValueArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArrayMap0 = readerSchema.getField("recordsArrayMap").schema();
+        this.recordsArrayMapArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapElemMapValueSchema0 = recordsArrayMapArrayElemSchema0 .getValueType();
+        this.recordsArrayMapElemValueOptionSchema0 = recordsArrayMapElemMapValueSchema0 .getTypes().get(1);
+        this.subField0 = recordsArrayMapElemValueOptionSchema0 .getField("subField").schema();
+        this.recordsMapArray0 = readerSchema.getField("recordsMapArray").schema();
+        this.recordsMapArrayMapValueSchema0 = recordsMapArray0 .getValueType();
+        this.recordsMapArrayValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+        this.recordsArrayMapUnion0 = readerSchema.getField("recordsArrayMapUnion").schema();
+        this.recordsArrayMapUnionOptionArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapUnionOptionElemMapValueSchema0 = recordsArrayMapUnionOptionArrayElemSchema0 .getValueType();
+        this.recordsMapArrayUnion0 = readerSchema.getField("recordsMapArrayUnion").schema();
+        this.recordsMapArrayUnionOptionSchema0 = recordsMapArrayUnion0 .getTypes().get(1);
+        this.recordsMapArrayUnionOptionValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Map<Utf8, IndexedRecord>> recordsArrayMap1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArrayMap1 = ((List) oldArray0);
+            recordsArrayMap1 .clear();
+        } else {
+            recordsArrayMap1 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen0), recordsArrayMap0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Map<Utf8, IndexedRecord> recordsArrayMapElem0 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex0 = (decoder.readIndex());
+                            if (unionIndex0 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key0, null);
+                            } else {
+                                if (unionIndex0 == 1) {
+                                    recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex0));
+                                }
+                            }
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                recordsArrayMap1 .add(recordsArrayMapElem0);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(0, recordsArrayMap1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayMapElemValueOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayMapElemValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<IndexedRecord>> recordsMapArray1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray1 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    List<IndexedRecord> recordsMapArrayValue0 = null;
+                    long chunkLen3 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen3), recordsMapArrayMapValueSchema0);
+                    }
+                    while (chunkLen3 > 0) {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex2 = (decoder.readIndex());
+                            if (unionIndex2 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex2 == 1) {
+                                    recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex2));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.arrayNext());
+                    }
+                    recordsMapArray1 .put(key1, recordsMapArrayValue0);
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), 0));
+            } else {
+                recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(1, recordsMapArray1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                List<Map<Utf8, IndexedRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray1);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen4), recordsArrayMap0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen5 = (decoder.readMapStart());
+                        if (chunkLen5 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen5)));
+                            } else {
+                                Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                                    Utf8 key2 = (decoder.readString(null));
+                                    int unionIndex4 = (decoder.readIndex());
+                                    if (unionIndex4 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key2, null);
+                                    } else {
+                                        if (unionIndex4 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex4));
+                                        }
+                                    }
+                                }
+                                chunkLen5 = (decoder.mapNext());
+                            } while (chunkLen5 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readMapStart());
+                if (chunkLen6 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), ((int) chunkLen6)));
+                    } else {
+                        Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            List<IndexedRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen7 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen7), recordsMapArrayMapValueSchema0);
+                            }
+                            while (chunkLen7 > 0) {
+                                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex6 = (decoder.readIndex());
+                                    if (unionIndex6 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex6 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex6));
+                                        }
+                                    }
+                                }
+                                chunkLen7 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key3, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen6 = (decoder.mapNext());
+                    } while (chunkLen6 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
new file mode 100644
index 000000000..d6650febb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record0;
+    private final Schema recordOptionSchema0;
+    private final Schema subField0;
+    private final Schema field0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record0 = readerSchema.getField("record").schema();
+        this.recordOptionSchema0 = record0 .getTypes().get(1);
+        this.subField0 = recordOptionSchema0 .getField("subField").schema();
+        this.field0 = readerSchema.getField("field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'record': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder), (customization)));
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(2);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
new file mode 100644
index 000000000..c9d3d75a3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testNotRemoved0;
+    private final Schema testNotRemoved20;
+    private final Schema subRecord0;
+    private final Schema subRecordOptionSchema0;
+    private final Schema testNotRemoved1;
+    private final Schema testNotRemoved21;
+    private final Schema subRecordMap0;
+    private final Schema subRecordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testNotRemoved0 = readerSchema.getField("testNotRemoved").schema();
+        this.testNotRemoved20 = readerSchema.getField("testNotRemoved2").schema();
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordOptionSchema0 = subRecord0 .getTypes().get(1);
+        this.testNotRemoved1 = subRecordOptionSchema0 .getField("testNotRemoved").schema();
+        this.testNotRemoved21 = subRecordOptionSchema0 .getField("testNotRemoved2").schema();
+        this.subRecordMap0 = readerSchema.getField("subRecordMap").schema();
+        this.subRecordArray0 = readerSchema.getField("subRecordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex3));
+            }
+        }
+        Map<Utf8, IndexedRecord> subRecordMap1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
+                if (oldMap0 instanceof Map) {
+                    subRecordMapReuse0 = ((Map) oldMap0);
+                }
+                if (subRecordMapReuse0 != (null)) {
+                    subRecordMapReuse0 .clear();
+                    subRecordMap1 = subRecordMapReuse0;
+                } else {
+                    subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), 0));
+            } else {
+                subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(3, subRecordMap1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordOptionSchema0);
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = subRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex4));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex5 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = subRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<IndexedRecord> subRecordArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(4);
+        if (oldArray0 instanceof List) {
+            subRecordArray1 = ((List) oldArray0);
+            subRecordArray1 .clear();
+        } else {
+            subRecordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen1), subRecordArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object subRecordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    subRecordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(4, subRecordArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
new file mode 100644
index 000000000..e9cd9851f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder), (customization)));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubSubRecord0(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subSubRecord0((decoder));
+    }
+
+    private void populate_subSubRecord0(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
new file mode 100644
index 000000000..40522533e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord10;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord10 = readerSchema.getField("subRecord1").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord10);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubRecord20(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubRecord20(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subRecord20((decoder));
+    }
+
+    private void populate_subRecord20(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder), (customization)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
new file mode 100644
index 000000000..1a1f99e63
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
new file mode 100644
index 000000000..4e1c73700
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
new file mode 100644
index 000000000..f8ada0c46
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException("Found \"long\", expecting [\"null\", \"string\"]");
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
new file mode 100644
index 000000000..98351115b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
new file mode 100644
index 000000000..82064ecbd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
new file mode 100644
index 000000000..3819b56f8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
new file mode 100644
index 000000000..db4f82fb4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
new file mode 100644
index 000000000..e598b2928
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
new file mode 100644
index 000000000..d62297fc9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
new file mode 100644
index 000000000..62f447117
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
new file mode 100644
index 000000000..17efd5b49
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
new file mode 100644
index 000000000..d0d996cf9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
new file mode 100644
index 000000000..ccfcf6d0c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
new file mode 100644
index 000000000..ebf71fc34
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
new file mode 100644
index 000000000..17d936e1b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
new file mode 100644
index 000000000..acdefdd62
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
new file mode 100644
index 000000000..454fe8b7f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
new file mode 100644
index 000000000..7bbd80759
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
new file mode 100644
index 000000000..f80badf79
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
new file mode 100644
index 000000000..abf3b700d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
new file mode 100644
index 000000000..ba2c71da8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(2);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
new file mode 100644
index 000000000..dec4be8b0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
new file mode 100644
index 000000000..ac530ae30
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(2);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
new file mode 100644
index 000000000..2e518d354
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
new file mode 100644
index 000000000..5d05a4047
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
new file mode 100644
index 000000000..2b6ed8f8f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
new file mode 100644
index 000000000..6cbf0606e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
new file mode 100644
index 000000000..d1db1358a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
@@ -0,0 +1,1071 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
new file mode 100644
index 000000000..0b6c578c4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericDeserializer_2140000109_2140000109
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema mapValueOptionSchema0;
+    private final Schema field0;
+
+    public Map_of_UNION_GenericDeserializer_2140000109_2140000109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.mapValueOptionSchema0 = mapMapValueSchema0 .getTypes().get(1);
+        this.field0 = mapValueOptionSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapValueOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_UNION_SpecificDeserializer_971650236_971650236.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
new file mode 100644
index 000000000..448c4a1d1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
@@ -0,0 +1,1081 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_SpecificDeserializer_971650236_971650236
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_UNION_SpecificDeserializer_971650236_971650236(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_record_GenericDeserializer_1223705675_568621313.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_record_GenericDeserializer_1223705675_568621313.java
new file mode 100644
index 000000000..d77e81899
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_record_GenericDeserializer_1223705675_568621313.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1223705675_568621313
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionMapValueSchema0;
+
+    public Map_of_record_GenericDeserializer_1223705675_568621313(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionMapValueSchema0 = readerSchema.getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
+                        if ((reuse) instanceof Map) {
+                            unionOptionReuse0 = ((Map)(reuse));
+                        }
+                        if (unionOptionReuse0 != (null)) {
+                            unionOptionReuse0 .clear();
+                            unionOption0 = unionOptionReuse0;
+                        } else {
+                            unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            unionOption0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+                    } else {
+                        unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_record_GenericDeserializer_1677529043_1677529043.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_record_GenericDeserializer_1677529043_1677529043.java
new file mode 100644
index 000000000..93ec20996
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/Map_of_record_GenericDeserializer_1677529043_1677529043.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1677529043_1677529043
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema field0;
+
+    public Map_of_record_GenericDeserializer_1677529043_1677529043(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.field0 = mapMapValueSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
new file mode 100644
index 000000000..dc7862aa2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField>
+{
+
+    private final Schema readerSchema;
+
+    public RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRecordWithLargeUnionField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField RecordWithLargeUnionField;
+        if ((reuse)!= null) {
+            RecordWithLargeUnionField = ((com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField)(reuse));
+        } else {
+            RecordWithLargeUnionField = new com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Utf8 charSequence0;
+            Object oldString0 = RecordWithLargeUnionField.get(0);
+            if (oldString0 instanceof Utf8) {
+                charSequence0 = (decoder).readString(((Utf8) oldString0));
+            } else {
+                charSequence0 = (decoder).readString(null);
+            }
+            RecordWithLargeUnionField.put(0, charSequence0);
+        } else {
+            if (unionIndex0 == 1) {
+                RecordWithLargeUnionField.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException(new StringBuilder().append("Found").append(" \"byt").append("es\", ").append("expec").append("ting ").append("[\"str").append("ing\",").append(" \"int").append("\"]").toString());
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+                }
+            }
+        }
+        return RecordWithLargeUnionField;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
new file mode 100644
index 000000000..b1f22169e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        return RemovedTypesTestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
new file mode 100644
index 000000000..49f5c15e4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
@@ -0,0 +1,406 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord3((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord4((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord5((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord6((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord7((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord8((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord9((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord10((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord11((RemovedTypesTestRecord), (customization), (decoder));
+        return RemovedTypesTestRecord;
+    }
+
+    private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipBytes();
+        long chunkLen0 = (decoder.readArrayStart());
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object removedBytesArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipBytes();
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.skipBytes();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedBytesUnion': "+ unionIndex0));
+            }
+        }
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    decoder.skipBytes();
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen2 = (decoder.readArrayStart());
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object removedBytesUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex1 == 1) {
+                        decoder.skipBytes();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedBytesUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex2 = (decoder.readIndex());
+                    if (unionIndex2 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex2 == 1) {
+                            decoder.skipBytes();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedBytesUnionMapValue': "+ unionIndex2));
+                        }
+                    }
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipFixed(1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex3 == 1) {
+                decoder.skipFixed(1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedFixedUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen4 = (decoder.readArrayStart());
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object removedFixedArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipFixed(1);
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    decoder.skipFixed(1);
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen6 = (decoder.readArrayStart());
+        while (chunkLen6 > 0) {
+            for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                Object removedFixedUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex4 = (decoder.readIndex());
+                if (unionIndex4 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex4 == 1) {
+                        decoder.skipFixed(1);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedFixedUnionArrayElem': "+ unionIndex4));
+                    }
+                }
+            }
+            chunkLen6 = (decoder.arrayNext());
+        }
+        long chunkLen7 = (decoder.readMapStart());
+        if (chunkLen7 > 0) {
+            do {
+                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    int unionIndex5 = (decoder.readIndex());
+                    if (unionIndex5 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex5 == 1) {
+                            decoder.skipFixed(1);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedFixedUnionMapValue': "+ unionIndex5));
+                        }
+                    }
+                }
+                chunkLen7 = (decoder.mapNext());
+            } while (chunkLen7 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.readEnum();
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.readEnum();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedEnumUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen8 = (decoder.readArrayStart());
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                decoder.readEnum();
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        long chunkLen9 = (decoder.readMapStart());
+        if (chunkLen9 > 0) {
+            do {
+                for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    decoder.readEnum();
+                }
+                chunkLen9 = (decoder.mapNext());
+            } while (chunkLen9 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen10 = (decoder.readArrayStart());
+        while (chunkLen10 > 0) {
+            for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                Object removedEnumUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex7 = (decoder.readIndex());
+                if (unionIndex7 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex7 == 1) {
+                        decoder.readEnum();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedEnumUnionArrayElem': "+ unionIndex7));
+                    }
+                }
+            }
+            chunkLen10 = (decoder.arrayNext());
+        }
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key5 = (decoder.readString(null));
+                    int unionIndex8 = (decoder.readIndex());
+                    if (unionIndex8 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex8 == 1) {
+                            decoder.readEnum();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedEnumUnionMapValue': "+ unionIndex8));
+                        }
+                    }
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializeRemovedSubRecord0(null, (decoder), (customization));
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex9 == 1) {
+                deserializeRemovedSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedSubRecordUnion': "+ unionIndex9));
+            }
+        }
+    }
+
+    public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen12 = (decoder.readArrayStart());
+        while (chunkLen12 > 0) {
+            for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                Object removedSubRecordArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder), (customization));
+            }
+            chunkLen12 = (decoder.arrayNext());
+        }
+        long chunkLen13 = (decoder.readArrayStart());
+        while (chunkLen13 > 0) {
+            for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                Object removedSubRecordUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex10 == 1) {
+                        deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder), (customization));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen13 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen14 = (decoder.readMapStart());
+        if (chunkLen14 > 0) {
+            do {
+                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                    Utf8 key6 = (decoder.readString(null));
+                    deserializeRemovedSubRecord0(null, (decoder), (customization));
+                }
+                chunkLen14 = (decoder.mapNext());
+            } while (chunkLen14 > 0);
+        }
+        long chunkLen15 = (decoder.readMapStart());
+        if (chunkLen15 > 0) {
+            do {
+                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                    Utf8 key7 = (decoder.readString(null));
+                    int unionIndex11 = (decoder.readIndex());
+                    if (unionIndex11 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex11 == 1) {
+                            deserializeRemovedSubRecord0(null, (decoder), (customization));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionMapValue': "+ unionIndex11));
+                        }
+                    }
+                }
+                chunkLen15 = (decoder.mapNext());
+            } while (chunkLen15 > 0);
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
new file mode 100644
index 000000000..f5b8cd869
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
@@ -0,0 +1,172 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest1_SpecificDeserializer_1718878379_595582209
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest1_SpecificDeserializer_1718878379_595582209(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSplitRecordTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1;
+        if ((reuse)!= null) {
+            SplitRecordTest1 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1)(reuse));
+        } else {
+            SplitRecordTest1 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1();
+        }
+        SplitRecordTest1 .put(0, deserializeFullRecord0(SplitRecordTest1 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest10((SplitRecordTest1), (customization), (decoder));
+        return SplitRecordTest1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FullRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        FullRecord.put(1, null);
+        return FullRecord;
+    }
+
+    private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest1 .put(1, deserializeFullRecord1(SplitRecordTest1 .get(1), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest1 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            record30 .clear();
+        } else {
+            record30 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord2(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest1 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+        FullRecord.put(0, null);
+        return FullRecord;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord2(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FullRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_FullRecord0((FullRecord), (customization), (decoder));
+        return FullRecord;
+    }
+
+    private void populate_FullRecord0(com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
new file mode 100644
index 000000000..8bd1969c6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
@@ -0,0 +1,204 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FullRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringRecord;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest2_SpecificDeserializer_595582209_1718878379
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest2_SpecificDeserializer_595582209_1718878379(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest20((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSplitRecordTest20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2;
+        if ((reuse)!= null) {
+            SplitRecordTest2 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2)(reuse));
+        } else {
+            SplitRecordTest2 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2();
+        }
+        SplitRecordTest2 .put(0, deserializeStringRecord0(SplitRecordTest2 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest20((SplitRecordTest2), (customization), (decoder));
+        return SplitRecordTest2;
+    }
+
+    public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        StringRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((StringRecord)(reuse));
+        } else {
+            IntRecord = new StringRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = IntRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        populate_IntRecord0((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord0(StringRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest2 .put(1, deserializeIntRecord0(SplitRecordTest2 .get(1), (decoder), (customization)));
+        List<FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest2 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            record30 .clear();
+        } else {
+            record30 = new ArrayList<FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord0(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest2 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((com.linkedin.avro.fastserde.generated.avro.IntRecord)(reuse));
+        } else {
+            IntRecord = new com.linkedin.avro.fastserde.generated.avro.IntRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex2 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_IntRecord1((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex3 == 1) {
+                IntRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+    public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        FullRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((FullRecord)(reuse));
+        } else {
+            IntRecord = new FullRecord();
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = IntRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex4));
+            }
+        }
+        populate_IntRecord2((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord2(FullRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            IntRecord.put(1, null);
+        } else {
+            if (unionIndex5 == 1) {
+                IntRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/StringableRecord_SpecificDeserializer_842267318_842267318.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/StringableRecord_SpecificDeserializer_842267318_842267318.java
new file mode 100644
index 000000000..42dea84bf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/StringableRecord_SpecificDeserializer_842267318_842267318.java
@@ -0,0 +1,255 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificDeserializer_842267318_842267318
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.StringableRecord>
+{
+
+    private final Schema readerSchema;
+
+    public StringableRecord_SpecificDeserializer_842267318_842267318(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeStringableRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord;
+        if ((reuse)!= null) {
+            StringableRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableRecord)(reuse));
+        } else {
+            StringableRecord = new com.linkedin.avro.fastserde.generated.avro.StringableRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = StringableRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        StringableRecord.put(0, charSequence0);
+        populate_StringableRecord0((StringableRecord), (customization), (decoder));
+        populate_StringableRecord1((StringableRecord), (customization), (decoder));
+        populate_StringableRecord2((StringableRecord), (customization), (decoder));
+        populate_StringableRecord3((StringableRecord), (customization), (decoder));
+        populate_StringableRecord4((StringableRecord), (customization), (decoder));
+        return StringableRecord;
+    }
+
+    private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = StringableRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        StringableRecord.put(1, charSequence1);
+        Utf8 charSequence2;
+        Object oldString2 = StringableRecord.get(2);
+        if (oldString2 instanceof Utf8) {
+            charSequence2 = (decoder).readString(((Utf8) oldString2));
+        } else {
+            charSequence2 = (decoder).readString(null);
+        }
+        StringableRecord.put(2, charSequence2);
+    }
+
+    private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence3;
+        Object oldString3 = StringableRecord.get(3);
+        if (oldString3 instanceof Utf8) {
+            charSequence3 = (decoder).readString(((Utf8) oldString3));
+        } else {
+            charSequence3 = (decoder).readString(null);
+        }
+        StringableRecord.put(3, charSequence3);
+        Utf8 charSequence4;
+        Object oldString4 = StringableRecord.get(4);
+        if (oldString4 instanceof Utf8) {
+            charSequence4 = (decoder).readString(((Utf8) oldString4));
+        } else {
+            charSequence4 = (decoder).readString(null);
+        }
+        StringableRecord.put(4, charSequence4);
+    }
+
+    private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Utf8> urlArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = StringableRecord.get(5);
+        if (oldArray0 instanceof List) {
+            urlArray0 = ((List) oldArray0);
+            urlArray0 .clear();
+        } else {
+            urlArray0 = new ArrayList<Utf8>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object urlArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    urlArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence5;
+                if (urlArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) urlArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                urlArray0 .add(charSequence5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        StringableRecord.put(5, urlArray0);
+        Map<Utf8, Utf8> urlMap0 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> urlMapReuse0 = null;
+                Object oldMap0 = StringableRecord.get(6);
+                if (oldMap0 instanceof Map) {
+                    urlMapReuse0 = ((Map) oldMap0);
+                }
+                if (urlMapReuse0 != (null)) {
+                    urlMapReuse0 .clear();
+                    urlMap0 = urlMapReuse0;
+                } else {
+                    urlMap0 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence6 = (decoder).readString(null);
+                    urlMap0 .put(key0, charSequence6);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), 0));
+            } else {
+                urlMap0 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        StringableRecord.put(6, urlMap0);
+    }
+
+    private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        StringableRecord.put(7, deserializeStringableSubRecord0(StringableRecord.get(7), (decoder), (customization)));
+        StringableRecord.put(8, deserializeAnotherSubRecord0(StringableRecord.get(8), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord;
+        if ((reuse)!= null) {
+            StringableSubRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableSubRecord)(reuse));
+        } else {
+            StringableSubRecord = new com.linkedin.avro.fastserde.generated.avro.StringableSubRecord();
+        }
+        Utf8 charSequence7;
+        Object oldString5 = StringableSubRecord.get(0);
+        if (oldString5 instanceof Utf8) {
+            charSequence7 = (decoder).readString(((Utf8) oldString5));
+        } else {
+            charSequence7 = (decoder).readString(null);
+        }
+        StringableSubRecord.put(0, charSequence7);
+        populate_StringableSubRecord0((StringableSubRecord), (customization), (decoder));
+        return StringableSubRecord;
+    }
+
+    private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            StringableSubRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence8;
+                Object oldString6 = StringableSubRecord.get(1);
+                if (oldString6 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                StringableSubRecord.put(1, charSequence8);
+            } else {
+                if (unionIndex0 == 2) {
+                    StringableSubRecord.put(1, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullStringIntUnion': "+ unionIndex0));
+                }
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord AnotherSubRecord;
+        if ((reuse)!= null) {
+            AnotherSubRecord = ((com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord)(reuse));
+        } else {
+            AnotherSubRecord = new com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord();
+        }
+        AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder), (customization)));
+        return AnotherSubRecord;
+    }
+
+    private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            StringableRecord.put(9, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence9;
+                Object oldString7 = StringableRecord.get(9);
+                if (oldString7 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                StringableRecord.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'stringUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
new file mode 100644
index 000000000..85c29a78d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
@@ -0,0 +1,46 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class TestArrayOfFloats_GenericDeserializer_1408566797_1408566797
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema array_of_float0;
+
+    public TestArrayOfFloats_GenericDeserializer_1408566797_1408566797(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.array_of_float0 = readerSchema.getField("array_of_float").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestArrayOfFloats0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestArrayOfFloats;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestArrayOfFloats = ((IndexedRecord)(reuse));
+        } else {
+            TestArrayOfFloats = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveFloatList array_of_float1 = null;
+        array_of_float1 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestArrayOfFloats.get(0), (decoder)));
+        TestArrayOfFloats.put(0, array_of_float1);
+        return TestArrayOfFloats;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_GenericDeserializer_473555078_473555078.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_GenericDeserializer_473555078_473555078.java
new file mode 100644
index 000000000..9a9ffcffc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_GenericDeserializer_473555078_473555078.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_GenericDeserializer_473555078_473555078
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema map_field0;
+
+    public TestRecord_GenericDeserializer_473555078_473555078(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.map_field0 = readerSchema.getField("map_field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestRecord = ((IndexedRecord)(reuse));
+        } else {
+            TestRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Utf8> map_field1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Utf8> map_fieldReuse0 = null;
+                Object oldMap0 = TestRecord.get(0);
+                if (oldMap0 instanceof Map) {
+                    map_fieldReuse0 = ((Map) oldMap0);
+                }
+                if (map_fieldReuse0 != (null)) {
+                    map_fieldReuse0 .clear();
+                    map_field1 = map_fieldReuse0;
+                } else {
+                    map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence0 = (decoder).readString(null);
+                    map_field1 .put(key0, charSequence0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), 0));
+            } else {
+                map_field1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        TestRecord.put(0, map_field1);
+        return TestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_1898726132_553331077.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_1898726132_553331077.java
new file mode 100644
index 000000000..d9c18ac0c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_1898726132_553331077.java
@@ -0,0 +1,1039 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1898726132_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1898726132_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_1991094399_553331077.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_1991094399_553331077.java
new file mode 100644
index 000000000..378132bc2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_1991094399_553331077.java
@@ -0,0 +1,1043 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1991094399_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1991094399_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(6);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        tempEnumMapping0 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(6);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        tempEnumMapping1 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(6);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        tempEnumMapping2 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(6);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        tempEnumMapping3 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_553331077_553331077.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_553331077_553331077.java
new file mode 100644
index 000000000..bfa744a0a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/TestRecord_SpecificDeserializer_553331077_553331077.java
@@ -0,0 +1,1040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_553331077_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public TestRecord_SpecificDeserializer_553331077_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen16 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen16));
+        }
+        while (chunkLen16 > 0) {
+            for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen16 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_1971822364_1672473580.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_1971822364_1672473580.java
new file mode 100644
index 000000000..180024cee
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_1971822364_1672473580.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_1971822364_1672473580
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordRecordSchema0;
+
+    public UNION_GenericDeserializer_1971822364_1672473580(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordRecordSchema0 = readerSchema.getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordRecordSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(recordRecordSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_2018567528_1606337179.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_2018567528_1606337179.java
new file mode 100644
index 000000000..bd367f7a9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_2018567528_1606337179.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_2018567528_1606337179
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArraySchema0;
+    private final Schema arrayArrayElemSchema0;
+
+    public UNION_GenericDeserializer_2018567528_1606337179(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArraySchema0 = readerSchema.getTypes().get(1);
+        this.arrayArrayElemSchema0 = arrayArraySchema0 .getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), arrayArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_568621313_1223705675.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_568621313_1223705675.java
new file mode 100644
index 000000000..480e2b959
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UNION_GenericDeserializer_568621313_1223705675.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class UNION_GenericDeserializer_568621313_1223705675
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapSchema0;
+    private final Schema mapMapValueSchema0;
+
+    public UNION_GenericDeserializer_568621313_1223705675(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapSchema0 = readerSchema.getTypes().get(1);
+        this.mapMapValueSchema0 = mapMapSchema0 .getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
new file mode 100644
index 000000000..5ec95b1b8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV1;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV2;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField>
+{
+
+    private final Schema readerSchema;
+
+    public UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeUnionOfRecordsWithSameNameEnumField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField UnionOfRecordsWithSameNameEnumField;
+        if ((reuse)!= null) {
+            UnionOfRecordsWithSameNameEnumField = ((com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField)(reuse));
+        } else {
+            UnionOfRecordsWithSameNameEnumField = new com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+        return UnionOfRecordsWithSameNameEnumField;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV1 MyRecordV1;
+        if ((reuse)!= null) {
+            MyRecordV1 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV1)(reuse));
+        } else {
+            MyRecordV1 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV1();
+        }
+        MyRecordV1 .put(0, Enums.getConstant(MyEnumV1 .class, (decoder.readEnum())));
+        return MyRecordV1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV2 MyRecordV2;
+        if ((reuse)!= null) {
+            MyRecordV2 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV2)(reuse));
+        } else {
+            MyRecordV2 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV2();
+        }
+        MyRecordV2 .put(0, Enums.getConstant(MyEnumV2 .class, (decoder.readEnum())));
+        return MyRecordV2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/recordName_GenericDeserializer_1743054079_1743054079.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/recordName_GenericDeserializer_1743054079_1743054079.java
new file mode 100644
index 000000000..a0258db47
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/recordName_GenericDeserializer_1743054079_1743054079.java
@@ -0,0 +1,67 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class recordName_GenericDeserializer_1743054079_1743054079
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionField0;
+
+    public recordName_GenericDeserializer_1743054079_1743054079(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionField0 = readerSchema.getField("unionField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecordName0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord recordName;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            recordName = ((IndexedRecord)(reuse));
+        } else {
+            recordName = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = recordName.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        recordName.put(0, charSequence0);
+        populate_recordName0((recordName), (customization), (decoder));
+        return recordName;
+    }
+
+    private void populate_recordName0(IndexedRecord recordName, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            recordName.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                recordName.put(1, deserializerecordName0(recordName.get(1), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1025741720_1557256887.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1025741720_1557256887.java
new file mode 100644
index 000000000..8bb0d7b29
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1025741720_1557256887.java
@@ -0,0 +1,96 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1025741720_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1025741720_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex1 = (decoder.readIndex());
+                            if (unionIndex1 == 0) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                if (unionIndex1 == 1) {
+                                    someIntsOption0 .put(key0, (decoder.readInt()));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'someIntsOptionValue': "+ unionIndex1));
+                                }
+                            }
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1126840752_2099305627.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1126840752_2099305627.java
new file mode 100644
index 000000000..6d70acf77
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1126840752_2099305627.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1126840752_2099305627
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1126840752_2099305627(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            if (unionIndex0 == 1) {
+                throw new AvroTypeException("Found \"string\", expecting \"int\"");
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someField': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1191367445_653449771.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1191367445_653449771.java
new file mode 100644
index 000000000..fc41b2d78
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1191367445_653449771.java
@@ -0,0 +1,69 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1191367445_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1191367445_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        someIntsOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1373882843_1971822364.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1373882843_1971822364.java
new file mode 100644
index 000000000..5e0368c30
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1373882843_1971822364.java
@@ -0,0 +1,45 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1373882843_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1373882843_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            throw new RuntimeException(("Illegal union index for 'someInt': "+ unionIndex0));
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1556659421_711533897.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1556659421_711533897.java
new file mode 100644
index 000000000..dcee8e0ec
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1556659421_711533897.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1556659421_711533897
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public record_GenericDeserializer_1556659421_711533897(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"subRecord\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"subRecord\",\"fields\":[{\"name\":\"someInt1\",\"type\":\"int\",\"doc\":\"\"},{\"name\":\"someInt2\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1557256887_1025741720.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1557256887_1025741720.java
new file mode 100644
index 000000000..ffbef6a42
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1557256887_1025741720.java
@@ -0,0 +1,81 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_1025741720
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+    private final Schema someIntsMapValueSchema0;
+
+    public record_GenericDeserializer_1557256887_1025741720(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+        this.someIntsMapValueSchema0 = someIntsMapSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1557256887_753570467.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1557256887_753570467.java
new file mode 100644
index 000000000..4f4c7b19c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1557256887_753570467.java
@@ -0,0 +1,79 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_753570467
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+
+    public record_GenericDeserializer_1557256887_753570467(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1672473580_1971822364.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1672473580_1971822364.java
new file mode 100644
index 000000000..c7837d439
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1672473580_1971822364.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1672473580_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1672473580_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                return deserializerecord0((reuse), (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1971822364_1373882843.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1971822364_1373882843.java
new file mode 100644
index 000000000..59945519f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_1971822364_1373882843.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1971822364_1373882843
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInt0;
+
+    public record_GenericDeserializer_1971822364_1373882843(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInt0 = readerSchema.getField("someInt").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_653449771_1191367445.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_653449771_1191367445.java
new file mode 100644
index 000000000..fb662a7dd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_653449771_1191367445.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_1191367445
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+
+    public record_GenericDeserializer_653449771_1191367445(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveIntList someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof PrimitiveIntList) {
+            someInts1 = ((PrimitiveIntList) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_653449771_813379571.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_653449771_813379571.java
new file mode 100644
index 000000000..f80569d0c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_653449771_813379571.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_813379571
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+    private final Schema someIntsArrayElemSchema0;
+
+    public record_GenericDeserializer_653449771_813379571(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+        this.someIntsArrayElemSchema0 = someIntsArraySchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof List) {
+            someInts1 = ((List) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new org.apache.avro.generic.GenericData.Array<Integer>(((int) chunkLen0), someIntsArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .add((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_711533897_1556659421.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_711533897_1556659421.java
new file mode 100644
index 000000000..db813c795
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_711533897_1556659421.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_711533897_1556659421
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+    private final Schema subRecordRecordSchema0;
+
+    public record_GenericDeserializer_711533897_1556659421(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordRecordSchema0 = subRecord0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordRecordSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordRecordSchema0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_753570467_1557256887.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_753570467_1557256887.java
new file mode 100644
index 000000000..f3714a26b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_753570467_1557256887.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_753570467_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_753570467_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            someIntsOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_813379571_653449771.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_813379571_653449771.java
new file mode 100644
index 000000000..1e8a4ffe1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/record_GenericDeserializer_813379571_653449771.java
@@ -0,0 +1,83 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_813379571_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_813379571_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object someIntsOptionArrayElementReuseVar0 = null;
+                        if (oldArray0 instanceof GenericArray) {
+                            someIntsOptionArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                        }
+                        int unionIndex1 = (decoder.readIndex());
+                        if (unionIndex1 == 0) {
+                            someIntsOption0 .addPrimitive((decoder.readInt()));
+                        } else {
+                            if (unionIndex1 == 1) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'someIntsOptionElem': "+ unionIndex1));
+                            }
+                        }
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/testRecord_GenericDeserializer_1146484089_1256982207.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/testRecord_GenericDeserializer_1146484089_1256982207.java
new file mode 100644
index 000000000..daa4c0a2d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_5/testRecord_GenericDeserializer_1146484089_1256982207.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class testRecord_GenericDeserializer_1146484089_1256982207
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+
+    public testRecord_GenericDeserializer_1146484089_1256982207(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.testEnum: No match for C"));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializetestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord testRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            testRecord = ((IndexedRecord)(reuse));
+        } else {
+            testRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        testRecord.put(0, enumValue0);
+        return testRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_BOOLEAN_GenericSerializer_869749973.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_BOOLEAN_GenericSerializer_869749973.java
new file mode 100644
index 000000000..c29784185
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_BOOLEAN_GenericSerializer_869749973.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_BOOLEAN_GenericSerializer_869749973
+    implements FastSerializer<List<Boolean>>
+{
+
+
+    public void serialize(List<Boolean> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveBooleanList) {
+                PrimitiveBooleanList primitiveList0 = ((PrimitiveBooleanList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_DOUBLE_GenericSerializer_18760307.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_DOUBLE_GenericSerializer_18760307.java
new file mode 100644
index 000000000..9503a506a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_DOUBLE_GenericSerializer_18760307.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_DOUBLE_GenericSerializer_18760307
+    implements FastSerializer<List<Double>>
+{
+
+
+    public void serialize(List<Double> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveDoubleList) {
+                PrimitiveDoubleList primitiveList0 = ((PrimitiveDoubleList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_FLOAT_GenericSerializer_1012670397.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_FLOAT_GenericSerializer_1012670397.java
new file mode 100644
index 000000000..dad1198f6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_FLOAT_GenericSerializer_1012670397.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_FLOAT_GenericSerializer_1012670397
+    implements FastSerializer<List<Float>>
+{
+
+
+    public void serialize(List<Float> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_INT_GenericSerializer_1012089072.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_INT_GenericSerializer_1012089072.java
new file mode 100644
index 000000000..fae999c59
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_INT_GenericSerializer_1012089072.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_INT_GenericSerializer_1012089072
+    implements FastSerializer<List<Integer>>
+{
+
+
+    public void serialize(List<Integer> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_LONG_GenericSerializer_325099267.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_LONG_GenericSerializer_325099267.java
new file mode 100644
index 000000000..c38904924
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_LONG_GenericSerializer_325099267.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_LONG_GenericSerializer_325099267
+    implements FastSerializer<List<Long>>
+{
+
+
+    public void serialize(List<Long> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveLongList) {
+                PrimitiveLongList primitiveList0 = ((PrimitiveLongList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_UNION_GenericSerializer_777827233.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_UNION_GenericSerializer_777827233.java
new file mode 100644
index 000000000..a1d781988
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_UNION_GenericSerializer_777827233.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericSerializer_777827233
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord union0 = null;
+                union0 = ((List<IndexedRecord> ) data).get(counter0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_record_GenericSerializer_477614132.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_record_GenericSerializer_477614132.java
new file mode 100644
index 000000000..147e5bb59
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Array_of_record_GenericSerializer_477614132.java
@@ -0,0 +1,53 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericSerializer_477614132
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord record0 = null;
+                record0 = ((List<IndexedRecord> ) data).get(counter0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
new file mode 100644
index 000000000..06cfb40a8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
@@ -0,0 +1,4527 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        (encoder).writeInt(((Integer) data.get(2)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(3)));
+        (encoder).writeInt(((Integer) data.get(4)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(5)));
+        (encoder).writeInt(((Integer) data.get(6)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(7)));
+        (encoder).writeInt(((Integer) data.get(8)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(9)));
+        (encoder).writeInt(((Integer) data.get(10)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(11)));
+        (encoder).writeInt(((Integer) data.get(12)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(13)));
+        (encoder).writeInt(((Integer) data.get(14)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(15)));
+        (encoder).writeInt(((Integer) data.get(16)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(17)));
+        (encoder).writeInt(((Integer) data.get(18)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(19)));
+        (encoder).writeInt(((Integer) data.get(20)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(21)));
+        (encoder).writeInt(((Integer) data.get(22)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(23)));
+        (encoder).writeInt(((Integer) data.get(24)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(25)));
+        (encoder).writeInt(((Integer) data.get(26)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(27)));
+        (encoder).writeInt(((Integer) data.get(28)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(29)));
+        (encoder).writeInt(((Integer) data.get(30)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(31)));
+        (encoder).writeInt(((Integer) data.get(32)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(33)));
+        (encoder).writeInt(((Integer) data.get(34)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(35)));
+        (encoder).writeInt(((Integer) data.get(36)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(37)));
+        (encoder).writeInt(((Integer) data.get(38)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(39)));
+        (encoder).writeInt(((Integer) data.get(40)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(41)));
+        (encoder).writeInt(((Integer) data.get(42)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(43)));
+        (encoder).writeInt(((Integer) data.get(44)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(45)));
+        (encoder).writeInt(((Integer) data.get(46)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(47)));
+        (encoder).writeInt(((Integer) data.get(48)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(49)));
+        (encoder).writeInt(((Integer) data.get(50)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(51)));
+        (encoder).writeInt(((Integer) data.get(52)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(53)));
+        (encoder).writeInt(((Integer) data.get(54)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(55)));
+        (encoder).writeInt(((Integer) data.get(56)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(57)));
+        (encoder).writeInt(((Integer) data.get(58)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(59)));
+        (encoder).writeInt(((Integer) data.get(60)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(61)));
+        (encoder).writeInt(((Integer) data.get(62)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(63)));
+        (encoder).writeInt(((Integer) data.get(64)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(65)));
+        (encoder).writeInt(((Integer) data.get(66)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(67)));
+        (encoder).writeInt(((Integer) data.get(68)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(69)));
+        (encoder).writeInt(((Integer) data.get(70)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(71)));
+        (encoder).writeInt(((Integer) data.get(72)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(73)));
+        (encoder).writeInt(((Integer) data.get(74)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(75)));
+        (encoder).writeInt(((Integer) data.get(76)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(77)));
+        (encoder).writeInt(((Integer) data.get(78)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(79)));
+        (encoder).writeInt(((Integer) data.get(80)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(81)));
+        (encoder).writeInt(((Integer) data.get(82)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(83)));
+        (encoder).writeInt(((Integer) data.get(84)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(85)));
+        (encoder).writeInt(((Integer) data.get(86)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(87)));
+        (encoder).writeInt(((Integer) data.get(88)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(89)));
+        (encoder).writeInt(((Integer) data.get(90)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(91)));
+        (encoder).writeInt(((Integer) data.get(92)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(93)));
+        (encoder).writeInt(((Integer) data.get(94)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(95)));
+        (encoder).writeInt(((Integer) data.get(96)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(97)));
+        (encoder).writeInt(((Integer) data.get(98)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(99)));
+        (encoder).writeInt(((Integer) data.get(100)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(101)));
+        (encoder).writeInt(((Integer) data.get(102)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(103)));
+        (encoder).writeInt(((Integer) data.get(104)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(105)));
+        (encoder).writeInt(((Integer) data.get(106)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(107)));
+        (encoder).writeInt(((Integer) data.get(108)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(109)));
+        (encoder).writeInt(((Integer) data.get(110)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(111)));
+        (encoder).writeInt(((Integer) data.get(112)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(113)));
+        (encoder).writeInt(((Integer) data.get(114)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(115)));
+        (encoder).writeInt(((Integer) data.get(116)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(117)));
+        (encoder).writeInt(((Integer) data.get(118)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(119)));
+        (encoder).writeInt(((Integer) data.get(120)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(121)));
+        (encoder).writeInt(((Integer) data.get(122)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(123)));
+        (encoder).writeInt(((Integer) data.get(124)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(125)));
+        (encoder).writeInt(((Integer) data.get(126)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(127)));
+        (encoder).writeInt(((Integer) data.get(128)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(129)));
+        (encoder).writeInt(((Integer) data.get(130)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(131)));
+        (encoder).writeInt(((Integer) data.get(132)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(133)));
+        (encoder).writeInt(((Integer) data.get(134)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(135)));
+        (encoder).writeInt(((Integer) data.get(136)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(137)));
+        (encoder).writeInt(((Integer) data.get(138)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(139)));
+        (encoder).writeInt(((Integer) data.get(140)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(141)));
+        (encoder).writeInt(((Integer) data.get(142)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(143)));
+        (encoder).writeInt(((Integer) data.get(144)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(145)));
+        (encoder).writeInt(((Integer) data.get(146)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(147)));
+        (encoder).writeInt(((Integer) data.get(148)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(149)));
+        (encoder).writeInt(((Integer) data.get(150)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(151)));
+        (encoder).writeInt(((Integer) data.get(152)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(153)));
+        (encoder).writeInt(((Integer) data.get(154)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(155)));
+        (encoder).writeInt(((Integer) data.get(156)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(157)));
+        (encoder).writeInt(((Integer) data.get(158)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(159)));
+        (encoder).writeInt(((Integer) data.get(160)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(161)));
+        (encoder).writeInt(((Integer) data.get(162)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(163)));
+        (encoder).writeInt(((Integer) data.get(164)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(165)));
+        (encoder).writeInt(((Integer) data.get(166)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(167)));
+        (encoder).writeInt(((Integer) data.get(168)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(169)));
+        (encoder).writeInt(((Integer) data.get(170)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(171)));
+        (encoder).writeInt(((Integer) data.get(172)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(173)));
+        (encoder).writeInt(((Integer) data.get(174)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(175)));
+        (encoder).writeInt(((Integer) data.get(176)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(177)));
+        (encoder).writeInt(((Integer) data.get(178)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(179)));
+        (encoder).writeInt(((Integer) data.get(180)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(181)));
+        (encoder).writeInt(((Integer) data.get(182)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(183)));
+        (encoder).writeInt(((Integer) data.get(184)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(185)));
+        (encoder).writeInt(((Integer) data.get(186)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(187)));
+        (encoder).writeInt(((Integer) data.get(188)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(189)));
+        (encoder).writeInt(((Integer) data.get(190)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(191)));
+        (encoder).writeInt(((Integer) data.get(192)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(193)));
+        (encoder).writeInt(((Integer) data.get(194)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(195)));
+        (encoder).writeInt(((Integer) data.get(196)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(197)));
+        (encoder).writeInt(((Integer) data.get(198)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(199)));
+        (encoder).writeInt(((Integer) data.get(200)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(201)));
+        (encoder).writeInt(((Integer) data.get(202)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(203)));
+        (encoder).writeInt(((Integer) data.get(204)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(205)));
+        (encoder).writeInt(((Integer) data.get(206)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(207)));
+        (encoder).writeInt(((Integer) data.get(208)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(209)));
+        (encoder).writeInt(((Integer) data.get(210)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(211)));
+        (encoder).writeInt(((Integer) data.get(212)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(213)));
+        (encoder).writeInt(((Integer) data.get(214)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(215)));
+        (encoder).writeInt(((Integer) data.get(216)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(217)));
+        (encoder).writeInt(((Integer) data.get(218)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(219)));
+        (encoder).writeInt(((Integer) data.get(220)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(221)));
+        (encoder).writeInt(((Integer) data.get(222)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(223)));
+        (encoder).writeInt(((Integer) data.get(224)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(225)));
+        (encoder).writeInt(((Integer) data.get(226)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(227)));
+        (encoder).writeInt(((Integer) data.get(228)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(229)));
+        (encoder).writeInt(((Integer) data.get(230)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(231)));
+        (encoder).writeInt(((Integer) data.get(232)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(233)));
+        (encoder).writeInt(((Integer) data.get(234)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(235)));
+        (encoder).writeInt(((Integer) data.get(236)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(237)));
+        (encoder).writeInt(((Integer) data.get(238)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(239)));
+        (encoder).writeInt(((Integer) data.get(240)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(241)));
+        (encoder).writeInt(((Integer) data.get(242)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(243)));
+        (encoder).writeInt(((Integer) data.get(244)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(245)));
+        (encoder).writeInt(((Integer) data.get(246)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(247)));
+        (encoder).writeInt(((Integer) data.get(248)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(249)));
+        (encoder).writeInt(((Integer) data.get(250)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(251)));
+        (encoder).writeInt(((Integer) data.get(252)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(253)));
+        (encoder).writeInt(((Integer) data.get(254)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(255)));
+        (encoder).writeInt(((Integer) data.get(256)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(257)));
+        (encoder).writeInt(((Integer) data.get(258)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(259)));
+        (encoder).writeInt(((Integer) data.get(260)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(261)));
+        (encoder).writeInt(((Integer) data.get(262)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(263)));
+        (encoder).writeInt(((Integer) data.get(264)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(265)));
+        (encoder).writeInt(((Integer) data.get(266)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(267)));
+        (encoder).writeInt(((Integer) data.get(268)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(269)));
+        (encoder).writeInt(((Integer) data.get(270)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(271)));
+        (encoder).writeInt(((Integer) data.get(272)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(273)));
+        (encoder).writeInt(((Integer) data.get(274)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(275)));
+        (encoder).writeInt(((Integer) data.get(276)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(277)));
+        (encoder).writeInt(((Integer) data.get(278)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(279)));
+        (encoder).writeInt(((Integer) data.get(280)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(281)));
+        (encoder).writeInt(((Integer) data.get(282)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(283)));
+        (encoder).writeInt(((Integer) data.get(284)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(285)));
+        (encoder).writeInt(((Integer) data.get(286)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(287)));
+        (encoder).writeInt(((Integer) data.get(288)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(289)));
+        (encoder).writeInt(((Integer) data.get(290)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(291)));
+        (encoder).writeInt(((Integer) data.get(292)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(293)));
+        (encoder).writeInt(((Integer) data.get(294)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(295)));
+        (encoder).writeInt(((Integer) data.get(296)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(297)));
+        (encoder).writeInt(((Integer) data.get(298)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(299)));
+        (encoder).writeInt(((Integer) data.get(300)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(301)));
+        (encoder).writeInt(((Integer) data.get(302)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(303)));
+        (encoder).writeInt(((Integer) data.get(304)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(305)));
+        (encoder).writeInt(((Integer) data.get(306)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(307)));
+        (encoder).writeInt(((Integer) data.get(308)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(309)));
+        (encoder).writeInt(((Integer) data.get(310)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(311)));
+        (encoder).writeInt(((Integer) data.get(312)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(313)));
+        (encoder).writeInt(((Integer) data.get(314)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(315)));
+        (encoder).writeInt(((Integer) data.get(316)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(317)));
+        (encoder).writeInt(((Integer) data.get(318)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(319)));
+        (encoder).writeInt(((Integer) data.get(320)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(321)));
+        (encoder).writeInt(((Integer) data.get(322)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(323)));
+        (encoder).writeInt(((Integer) data.get(324)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(325)));
+        (encoder).writeInt(((Integer) data.get(326)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(327)));
+        (encoder).writeInt(((Integer) data.get(328)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(329)));
+        (encoder).writeInt(((Integer) data.get(330)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(331)));
+        (encoder).writeInt(((Integer) data.get(332)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(333)));
+        (encoder).writeInt(((Integer) data.get(334)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(335)));
+        (encoder).writeInt(((Integer) data.get(336)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(337)));
+        (encoder).writeInt(((Integer) data.get(338)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(339)));
+        (encoder).writeInt(((Integer) data.get(340)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(341)));
+        (encoder).writeInt(((Integer) data.get(342)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(343)));
+        (encoder).writeInt(((Integer) data.get(344)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(345)));
+        (encoder).writeInt(((Integer) data.get(346)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(347)));
+        (encoder).writeInt(((Integer) data.get(348)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(349)));
+        (encoder).writeInt(((Integer) data.get(350)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(351)));
+        (encoder).writeInt(((Integer) data.get(352)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(353)));
+        (encoder).writeInt(((Integer) data.get(354)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(355)));
+        (encoder).writeInt(((Integer) data.get(356)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(357)));
+        (encoder).writeInt(((Integer) data.get(358)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(359)));
+        (encoder).writeInt(((Integer) data.get(360)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(361)));
+        (encoder).writeInt(((Integer) data.get(362)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(363)));
+        (encoder).writeInt(((Integer) data.get(364)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(365)));
+        (encoder).writeInt(((Integer) data.get(366)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(367)));
+        (encoder).writeInt(((Integer) data.get(368)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(369)));
+        (encoder).writeInt(((Integer) data.get(370)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(371)));
+        (encoder).writeInt(((Integer) data.get(372)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(373)));
+        (encoder).writeInt(((Integer) data.get(374)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(375)));
+        (encoder).writeInt(((Integer) data.get(376)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(377)));
+        (encoder).writeInt(((Integer) data.get(378)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(379)));
+        (encoder).writeInt(((Integer) data.get(380)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(381)));
+        (encoder).writeInt(((Integer) data.get(382)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(383)));
+        (encoder).writeInt(((Integer) data.get(384)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(385)));
+        (encoder).writeInt(((Integer) data.get(386)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(387)));
+        (encoder).writeInt(((Integer) data.get(388)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(389)));
+        (encoder).writeInt(((Integer) data.get(390)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(391)));
+        (encoder).writeInt(((Integer) data.get(392)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(393)));
+        (encoder).writeInt(((Integer) data.get(394)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(395)));
+        (encoder).writeInt(((Integer) data.get(396)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(397)));
+        (encoder).writeInt(((Integer) data.get(398)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(399)));
+        (encoder).writeInt(((Integer) data.get(400)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(401)));
+        (encoder).writeInt(((Integer) data.get(402)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(403)));
+        (encoder).writeInt(((Integer) data.get(404)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(405)));
+        (encoder).writeInt(((Integer) data.get(406)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(407)));
+        (encoder).writeInt(((Integer) data.get(408)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(409)));
+        (encoder).writeInt(((Integer) data.get(410)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(411)));
+        (encoder).writeInt(((Integer) data.get(412)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(413)));
+        (encoder).writeInt(((Integer) data.get(414)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(415)));
+        (encoder).writeInt(((Integer) data.get(416)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(417)));
+        (encoder).writeInt(((Integer) data.get(418)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(419)));
+        (encoder).writeInt(((Integer) data.get(420)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(421)));
+        (encoder).writeInt(((Integer) data.get(422)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(423)));
+        (encoder).writeInt(((Integer) data.get(424)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(425)));
+        (encoder).writeInt(((Integer) data.get(426)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(427)));
+        (encoder).writeInt(((Integer) data.get(428)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(429)));
+        (encoder).writeInt(((Integer) data.get(430)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(431)));
+        (encoder).writeInt(((Integer) data.get(432)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(433)));
+        (encoder).writeInt(((Integer) data.get(434)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(435)));
+        (encoder).writeInt(((Integer) data.get(436)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(437)));
+        (encoder).writeInt(((Integer) data.get(438)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(439)));
+        (encoder).writeInt(((Integer) data.get(440)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(441)));
+        (encoder).writeInt(((Integer) data.get(442)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(443)));
+        (encoder).writeInt(((Integer) data.get(444)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(445)));
+        (encoder).writeInt(((Integer) data.get(446)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(447)));
+        (encoder).writeInt(((Integer) data.get(448)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(449)));
+        (encoder).writeInt(((Integer) data.get(450)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(451)));
+        (encoder).writeInt(((Integer) data.get(452)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(453)));
+        (encoder).writeInt(((Integer) data.get(454)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(455)));
+        (encoder).writeInt(((Integer) data.get(456)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(457)));
+        (encoder).writeInt(((Integer) data.get(458)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(459)));
+        (encoder).writeInt(((Integer) data.get(460)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(461)));
+        (encoder).writeInt(((Integer) data.get(462)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(463)));
+        (encoder).writeInt(((Integer) data.get(464)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(465)));
+        (encoder).writeInt(((Integer) data.get(466)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(467)));
+        (encoder).writeInt(((Integer) data.get(468)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(469)));
+        (encoder).writeInt(((Integer) data.get(470)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(471)));
+        (encoder).writeInt(((Integer) data.get(472)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(473)));
+        (encoder).writeInt(((Integer) data.get(474)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(475)));
+        (encoder).writeInt(((Integer) data.get(476)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(477)));
+        (encoder).writeInt(((Integer) data.get(478)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(479)));
+        (encoder).writeInt(((Integer) data.get(480)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(481)));
+        (encoder).writeInt(((Integer) data.get(482)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(483)));
+        (encoder).writeInt(((Integer) data.get(484)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(485)));
+        (encoder).writeInt(((Integer) data.get(486)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(487)));
+        (encoder).writeInt(((Integer) data.get(488)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(489)));
+        (encoder).writeInt(((Integer) data.get(490)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(491)));
+        (encoder).writeInt(((Integer) data.get(492)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(493)));
+        (encoder).writeInt(((Integer) data.get(494)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(495)));
+        (encoder).writeInt(((Integer) data.get(496)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(497)));
+        (encoder).writeInt(((Integer) data.get(498)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(499)));
+        (encoder).writeInt(((Integer) data.get(500)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(501)));
+        (encoder).writeInt(((Integer) data.get(502)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(503)));
+        (encoder).writeInt(((Integer) data.get(504)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(505)));
+        (encoder).writeInt(((Integer) data.get(506)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(507)));
+        (encoder).writeInt(((Integer) data.get(508)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(509)));
+        (encoder).writeInt(((Integer) data.get(510)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(511)));
+        (encoder).writeInt(((Integer) data.get(512)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(513)));
+        (encoder).writeInt(((Integer) data.get(514)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(515)));
+        (encoder).writeInt(((Integer) data.get(516)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(517)));
+        (encoder).writeInt(((Integer) data.get(518)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(519)));
+        (encoder).writeInt(((Integer) data.get(520)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(521)));
+        (encoder).writeInt(((Integer) data.get(522)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(523)));
+        (encoder).writeInt(((Integer) data.get(524)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(525)));
+        (encoder).writeInt(((Integer) data.get(526)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(527)));
+        (encoder).writeInt(((Integer) data.get(528)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(529)));
+        (encoder).writeInt(((Integer) data.get(530)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(531)));
+        (encoder).writeInt(((Integer) data.get(532)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(533)));
+        (encoder).writeInt(((Integer) data.get(534)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(535)));
+        (encoder).writeInt(((Integer) data.get(536)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(537)));
+        (encoder).writeInt(((Integer) data.get(538)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(539)));
+        (encoder).writeInt(((Integer) data.get(540)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(541)));
+        (encoder).writeInt(((Integer) data.get(542)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(543)));
+        (encoder).writeInt(((Integer) data.get(544)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(545)));
+        (encoder).writeInt(((Integer) data.get(546)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(547)));
+        (encoder).writeInt(((Integer) data.get(548)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(549)));
+        (encoder).writeInt(((Integer) data.get(550)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(551)));
+        (encoder).writeInt(((Integer) data.get(552)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(553)));
+        (encoder).writeInt(((Integer) data.get(554)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(555)));
+        (encoder).writeInt(((Integer) data.get(556)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(557)));
+        (encoder).writeInt(((Integer) data.get(558)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(559)));
+        (encoder).writeInt(((Integer) data.get(560)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(561)));
+        (encoder).writeInt(((Integer) data.get(562)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(563)));
+        (encoder).writeInt(((Integer) data.get(564)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(565)));
+        (encoder).writeInt(((Integer) data.get(566)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(567)));
+        (encoder).writeInt(((Integer) data.get(568)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(569)));
+        (encoder).writeInt(((Integer) data.get(570)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(571)));
+        (encoder).writeInt(((Integer) data.get(572)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(573)));
+        (encoder).writeInt(((Integer) data.get(574)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(575)));
+        (encoder).writeInt(((Integer) data.get(576)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(577)));
+        (encoder).writeInt(((Integer) data.get(578)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(579)));
+        (encoder).writeInt(((Integer) data.get(580)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(581)));
+        (encoder).writeInt(((Integer) data.get(582)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(583)));
+        (encoder).writeInt(((Integer) data.get(584)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(585)));
+        (encoder).writeInt(((Integer) data.get(586)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(587)));
+        (encoder).writeInt(((Integer) data.get(588)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(589)));
+        (encoder).writeInt(((Integer) data.get(590)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(591)));
+        (encoder).writeInt(((Integer) data.get(592)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(593)));
+        (encoder).writeInt(((Integer) data.get(594)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(595)));
+        (encoder).writeInt(((Integer) data.get(596)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(597)));
+        (encoder).writeInt(((Integer) data.get(598)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(599)));
+        (encoder).writeInt(((Integer) data.get(600)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(601)));
+        (encoder).writeInt(((Integer) data.get(602)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(603)));
+        (encoder).writeInt(((Integer) data.get(604)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(605)));
+        (encoder).writeInt(((Integer) data.get(606)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(607)));
+        (encoder).writeInt(((Integer) data.get(608)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(609)));
+        (encoder).writeInt(((Integer) data.get(610)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(611)));
+        (encoder).writeInt(((Integer) data.get(612)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(613)));
+        (encoder).writeInt(((Integer) data.get(614)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(615)));
+        (encoder).writeInt(((Integer) data.get(616)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(617)));
+        (encoder).writeInt(((Integer) data.get(618)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(619)));
+        (encoder).writeInt(((Integer) data.get(620)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(621)));
+        (encoder).writeInt(((Integer) data.get(622)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(623)));
+        (encoder).writeInt(((Integer) data.get(624)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(625)));
+        (encoder).writeInt(((Integer) data.get(626)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(627)));
+        (encoder).writeInt(((Integer) data.get(628)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(629)));
+        (encoder).writeInt(((Integer) data.get(630)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(631)));
+        (encoder).writeInt(((Integer) data.get(632)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(633)));
+        (encoder).writeInt(((Integer) data.get(634)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(635)));
+        (encoder).writeInt(((Integer) data.get(636)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(637)));
+        (encoder).writeInt(((Integer) data.get(638)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(639)));
+        (encoder).writeInt(((Integer) data.get(640)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(641)));
+        (encoder).writeInt(((Integer) data.get(642)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(643)));
+        (encoder).writeInt(((Integer) data.get(644)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(645)));
+        (encoder).writeInt(((Integer) data.get(646)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(647)));
+        (encoder).writeInt(((Integer) data.get(648)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(649)));
+        (encoder).writeInt(((Integer) data.get(650)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(651)));
+        (encoder).writeInt(((Integer) data.get(652)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(653)));
+        (encoder).writeInt(((Integer) data.get(654)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(655)));
+        (encoder).writeInt(((Integer) data.get(656)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(657)));
+        (encoder).writeInt(((Integer) data.get(658)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(659)));
+        (encoder).writeInt(((Integer) data.get(660)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(661)));
+        (encoder).writeInt(((Integer) data.get(662)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(663)));
+        (encoder).writeInt(((Integer) data.get(664)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(665)));
+        (encoder).writeInt(((Integer) data.get(666)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(667)));
+        (encoder).writeInt(((Integer) data.get(668)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(669)));
+        (encoder).writeInt(((Integer) data.get(670)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(671)));
+        (encoder).writeInt(((Integer) data.get(672)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(673)));
+        (encoder).writeInt(((Integer) data.get(674)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(675)));
+        (encoder).writeInt(((Integer) data.get(676)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(677)));
+        (encoder).writeInt(((Integer) data.get(678)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(679)));
+        (encoder).writeInt(((Integer) data.get(680)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(681)));
+        (encoder).writeInt(((Integer) data.get(682)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(683)));
+        (encoder).writeInt(((Integer) data.get(684)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(685)));
+        (encoder).writeInt(((Integer) data.get(686)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(687)));
+        (encoder).writeInt(((Integer) data.get(688)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(689)));
+        (encoder).writeInt(((Integer) data.get(690)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(691)));
+        (encoder).writeInt(((Integer) data.get(692)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(693)));
+        (encoder).writeInt(((Integer) data.get(694)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(695)));
+        (encoder).writeInt(((Integer) data.get(696)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(697)));
+        (encoder).writeInt(((Integer) data.get(698)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(699)));
+        (encoder).writeInt(((Integer) data.get(700)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(701)));
+        (encoder).writeInt(((Integer) data.get(702)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(703)));
+        (encoder).writeInt(((Integer) data.get(704)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(705)));
+        (encoder).writeInt(((Integer) data.get(706)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(707)));
+        (encoder).writeInt(((Integer) data.get(708)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(709)));
+        (encoder).writeInt(((Integer) data.get(710)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(711)));
+        (encoder).writeInt(((Integer) data.get(712)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(713)));
+        (encoder).writeInt(((Integer) data.get(714)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(715)));
+        (encoder).writeInt(((Integer) data.get(716)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(717)));
+        (encoder).writeInt(((Integer) data.get(718)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(719)));
+        (encoder).writeInt(((Integer) data.get(720)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(721)));
+        (encoder).writeInt(((Integer) data.get(722)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(723)));
+        (encoder).writeInt(((Integer) data.get(724)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(725)));
+        (encoder).writeInt(((Integer) data.get(726)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(727)));
+        (encoder).writeInt(((Integer) data.get(728)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(729)));
+        (encoder).writeInt(((Integer) data.get(730)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(731)));
+        (encoder).writeInt(((Integer) data.get(732)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(733)));
+        (encoder).writeInt(((Integer) data.get(734)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(735)));
+        (encoder).writeInt(((Integer) data.get(736)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(737)));
+        (encoder).writeInt(((Integer) data.get(738)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(739)));
+        (encoder).writeInt(((Integer) data.get(740)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(741)));
+        (encoder).writeInt(((Integer) data.get(742)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(743)));
+        (encoder).writeInt(((Integer) data.get(744)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(745)));
+        (encoder).writeInt(((Integer) data.get(746)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(747)));
+        (encoder).writeInt(((Integer) data.get(748)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(749)));
+        (encoder).writeInt(((Integer) data.get(750)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(751)));
+        (encoder).writeInt(((Integer) data.get(752)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(753)));
+        (encoder).writeInt(((Integer) data.get(754)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(755)));
+        (encoder).writeInt(((Integer) data.get(756)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(757)));
+        (encoder).writeInt(((Integer) data.get(758)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(759)));
+        (encoder).writeInt(((Integer) data.get(760)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(761)));
+        (encoder).writeInt(((Integer) data.get(762)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(763)));
+        (encoder).writeInt(((Integer) data.get(764)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(765)));
+        (encoder).writeInt(((Integer) data.get(766)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(767)));
+        (encoder).writeInt(((Integer) data.get(768)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(769)));
+        (encoder).writeInt(((Integer) data.get(770)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(771)));
+        (encoder).writeInt(((Integer) data.get(772)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(773)));
+        (encoder).writeInt(((Integer) data.get(774)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(775)));
+        (encoder).writeInt(((Integer) data.get(776)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(777)));
+        (encoder).writeInt(((Integer) data.get(778)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(779)));
+        (encoder).writeInt(((Integer) data.get(780)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(781)));
+        (encoder).writeInt(((Integer) data.get(782)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(783)));
+        (encoder).writeInt(((Integer) data.get(784)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(785)));
+        (encoder).writeInt(((Integer) data.get(786)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(787)));
+        (encoder).writeInt(((Integer) data.get(788)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(789)));
+        (encoder).writeInt(((Integer) data.get(790)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(791)));
+        (encoder).writeInt(((Integer) data.get(792)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(793)));
+        (encoder).writeInt(((Integer) data.get(794)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(795)));
+        (encoder).writeInt(((Integer) data.get(796)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(797)));
+        (encoder).writeInt(((Integer) data.get(798)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(799)));
+        (encoder).writeInt(((Integer) data.get(800)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(801)));
+        (encoder).writeInt(((Integer) data.get(802)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(803)));
+        (encoder).writeInt(((Integer) data.get(804)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(805)));
+        (encoder).writeInt(((Integer) data.get(806)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(807)));
+        (encoder).writeInt(((Integer) data.get(808)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(809)));
+        (encoder).writeInt(((Integer) data.get(810)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(811)));
+        (encoder).writeInt(((Integer) data.get(812)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(813)));
+        (encoder).writeInt(((Integer) data.get(814)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(815)));
+        (encoder).writeInt(((Integer) data.get(816)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(817)));
+        (encoder).writeInt(((Integer) data.get(818)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(819)));
+        (encoder).writeInt(((Integer) data.get(820)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(821)));
+        (encoder).writeInt(((Integer) data.get(822)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(823)));
+        (encoder).writeInt(((Integer) data.get(824)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(825)));
+        (encoder).writeInt(((Integer) data.get(826)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(827)));
+        (encoder).writeInt(((Integer) data.get(828)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(829)));
+        (encoder).writeInt(((Integer) data.get(830)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(831)));
+        (encoder).writeInt(((Integer) data.get(832)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(833)));
+        (encoder).writeInt(((Integer) data.get(834)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(835)));
+        (encoder).writeInt(((Integer) data.get(836)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(837)));
+        (encoder).writeInt(((Integer) data.get(838)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(839)));
+        (encoder).writeInt(((Integer) data.get(840)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(841)));
+        (encoder).writeInt(((Integer) data.get(842)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(843)));
+        (encoder).writeInt(((Integer) data.get(844)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(845)));
+        (encoder).writeInt(((Integer) data.get(846)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(847)));
+        (encoder).writeInt(((Integer) data.get(848)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(849)));
+        (encoder).writeInt(((Integer) data.get(850)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(851)));
+        (encoder).writeInt(((Integer) data.get(852)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(853)));
+        (encoder).writeInt(((Integer) data.get(854)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(855)));
+        (encoder).writeInt(((Integer) data.get(856)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(857)));
+        (encoder).writeInt(((Integer) data.get(858)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(859)));
+        (encoder).writeInt(((Integer) data.get(860)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(861)));
+        (encoder).writeInt(((Integer) data.get(862)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(863)));
+        (encoder).writeInt(((Integer) data.get(864)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(865)));
+        (encoder).writeInt(((Integer) data.get(866)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(867)));
+        (encoder).writeInt(((Integer) data.get(868)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(869)));
+        (encoder).writeInt(((Integer) data.get(870)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(871)));
+        (encoder).writeInt(((Integer) data.get(872)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(873)));
+        (encoder).writeInt(((Integer) data.get(874)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(875)));
+        (encoder).writeInt(((Integer) data.get(876)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(877)));
+        (encoder).writeInt(((Integer) data.get(878)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(879)));
+        (encoder).writeInt(((Integer) data.get(880)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(881)));
+        (encoder).writeInt(((Integer) data.get(882)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(883)));
+        (encoder).writeInt(((Integer) data.get(884)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(885)));
+        (encoder).writeInt(((Integer) data.get(886)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(887)));
+        (encoder).writeInt(((Integer) data.get(888)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(889)));
+        (encoder).writeInt(((Integer) data.get(890)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(891)));
+        (encoder).writeInt(((Integer) data.get(892)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(893)));
+        (encoder).writeInt(((Integer) data.get(894)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(895)));
+        (encoder).writeInt(((Integer) data.get(896)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(897)));
+        (encoder).writeInt(((Integer) data.get(898)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(899)));
+        (encoder).writeInt(((Integer) data.get(900)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(901)));
+        (encoder).writeInt(((Integer) data.get(902)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(903)));
+        (encoder).writeInt(((Integer) data.get(904)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(905)));
+        (encoder).writeInt(((Integer) data.get(906)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(907)));
+        (encoder).writeInt(((Integer) data.get(908)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(909)));
+        (encoder).writeInt(((Integer) data.get(910)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(911)));
+        (encoder).writeInt(((Integer) data.get(912)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(913)));
+        (encoder).writeInt(((Integer) data.get(914)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(915)));
+        (encoder).writeInt(((Integer) data.get(916)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(917)));
+        (encoder).writeInt(((Integer) data.get(918)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(919)));
+        (encoder).writeInt(((Integer) data.get(920)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(921)));
+        (encoder).writeInt(((Integer) data.get(922)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(923)));
+        (encoder).writeInt(((Integer) data.get(924)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(925)));
+        (encoder).writeInt(((Integer) data.get(926)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(927)));
+        (encoder).writeInt(((Integer) data.get(928)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(929)));
+        (encoder).writeInt(((Integer) data.get(930)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(931)));
+        (encoder).writeInt(((Integer) data.get(932)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(933)));
+        (encoder).writeInt(((Integer) data.get(934)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(935)));
+        (encoder).writeInt(((Integer) data.get(936)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(937)));
+        (encoder).writeInt(((Integer) data.get(938)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(939)));
+        (encoder).writeInt(((Integer) data.get(940)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(941)));
+        (encoder).writeInt(((Integer) data.get(942)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(943)));
+        (encoder).writeInt(((Integer) data.get(944)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(945)));
+        (encoder).writeInt(((Integer) data.get(946)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(947)));
+        (encoder).writeInt(((Integer) data.get(948)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(949)));
+        (encoder).writeInt(((Integer) data.get(950)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(951)));
+        (encoder).writeInt(((Integer) data.get(952)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(953)));
+        (encoder).writeInt(((Integer) data.get(954)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(955)));
+        (encoder).writeInt(((Integer) data.get(956)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(957)));
+        (encoder).writeInt(((Integer) data.get(958)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(959)));
+        (encoder).writeInt(((Integer) data.get(960)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(961)));
+        (encoder).writeInt(((Integer) data.get(962)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(963)));
+        (encoder).writeInt(((Integer) data.get(964)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(965)));
+        (encoder).writeInt(((Integer) data.get(966)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(967)));
+        (encoder).writeInt(((Integer) data.get(968)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(969)));
+        (encoder).writeInt(((Integer) data.get(970)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(971)));
+        (encoder).writeInt(((Integer) data.get(972)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(973)));
+        (encoder).writeInt(((Integer) data.get(974)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(975)));
+        (encoder).writeInt(((Integer) data.get(976)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(977)));
+        (encoder).writeInt(((Integer) data.get(978)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(979)));
+        (encoder).writeInt(((Integer) data.get(980)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(981)));
+        (encoder).writeInt(((Integer) data.get(982)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(983)));
+        (encoder).writeInt(((Integer) data.get(984)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(985)));
+        (encoder).writeInt(((Integer) data.get(986)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(987)));
+        (encoder).writeInt(((Integer) data.get(988)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(989)));
+        (encoder).writeInt(((Integer) data.get(990)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(991)));
+        (encoder).writeInt(((Integer) data.get(992)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(993)));
+        (encoder).writeInt(((Integer) data.get(994)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(995)));
+        (encoder).writeInt(((Integer) data.get(996)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(997)));
+        (encoder).writeInt(((Integer) data.get(998)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(999)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
new file mode 100644
index 000000000..4ae4e108c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
@@ -0,0 +1,116 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericEnumSymbol testEnumUnion0 = ((GenericEnumSymbol) data.get(1));
+        if (testEnumUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testEnumUnion0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) testEnumUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                int valueToWrite1;
+                Object enumValue1 = testEnumUnion0;
+                if (enumValue1 instanceof Enum) {
+                    valueToWrite1 = ((Enum) enumValue1).ordinal();
+                } else {
+                    valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                }
+                (encoder).writeEnum(valueToWrite1);
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray0 = ((List<GenericEnumSymbol> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testEnumArray0 == null)||testEnumArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumArray0 .size());
+            for (int counter0 = 0; (counter0 <testEnumArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                int valueToWrite2;
+                Object enumValue2 = testEnumArray0 .get(counter0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray0 = ((List<GenericEnumSymbol> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testEnumUnionArray0 == null)||testEnumUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testEnumUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericEnumSymbol union0 = null;
+                union0 = ((List<GenericEnumSymbol> ) testEnumUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        int valueToWrite3;
+                        Object enumValue3 = union0;
+                        if (enumValue3 instanceof Enum) {
+                            valueToWrite3 = ((Enum) enumValue3).ordinal();
+                        } else {
+                            valueToWrite3 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite3);
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
new file mode 100644
index 000000000..ec8422775
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
@@ -0,0 +1,88 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericFixed testFixedUnion0 = ((GenericFixed) data.get(1));
+        if (testFixedUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testFixedUnion0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) testFixedUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                (encoder).writeFixed(((GenericFixed) testFixedUnion0).bytes());
+            }
+        }
+        List<GenericFixed> testFixedArray0 = ((List<GenericFixed> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testFixedArray0 == null)||testFixedArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedArray0 .size());
+            for (int counter0 = 0; (counter0 <testFixedArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeFixed(((GenericFixed) testFixedArray0 .get(counter0)).bytes());
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = ((List<GenericFixed> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testFixedUnionArray0 == null)||testFixedUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testFixedUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericFixed union0 = null;
+                union0 = ((List<GenericFixed> ) testFixedUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeFixed(((GenericFixed) union0).bytes());
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
new file mode 100644
index 000000000..f0ade5ee6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
@@ -0,0 +1,70 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union0 = ((Object) data.get(0));
+        if (union0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+            } else {
+                if (union0 instanceof CharSequence) {
+                    (encoder).writeIndex(2);
+                    if (((CharSequence) union0) instanceof Utf8) {
+                        (encoder).writeString(((Utf8)((CharSequence) union0)));
+                    } else {
+                        (encoder).writeString(((CharSequence) union0).toString());
+                    }
+                } else {
+                    if (union0 instanceof Integer) {
+                        (encoder).writeIndex(3);
+                        (encoder).writeInt(((Integer) union0));
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
new file mode 100644
index 000000000..2b3d56844
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
@@ -0,0 +1,157 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Integer testIntUnion0 = ((Integer) data.get(1));
+        if (testIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeInt(((Integer) testIntUnion0));
+        }
+        Integer testFlippedIntUnion0 = ((Integer) data.get(2));
+        if (testFlippedIntUnion0 == null) {
+            (encoder).writeIndex(1);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(0);
+            (encoder).writeInt(((Integer) testFlippedIntUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        CharSequence testStringUnion0 = ((CharSequence) data.get(4));
+        if (testStringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testStringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testStringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) testStringUnion0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(5)));
+        Long testLongUnion0 = ((Long) data.get(6));
+        if (testLongUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) testLongUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeDouble(((Double) data.get(7)));
+        Double testDoubleUnion0 = ((Double) data.get(8));
+        if (testDoubleUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeDouble(((Double) testDoubleUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFloat(((Float) data.get(9)));
+        Float testFloatUnion0 = ((Float) data.get(10));
+        if (testFloatUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeFloat(((Float) testFloatUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBoolean(((Boolean) data.get(11)));
+        Boolean testBooleanUnion0 = ((Boolean) data.get(12));
+        if (testBooleanUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBoolean(((Boolean) testBooleanUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBytes(((ByteBuffer) data.get(13)));
+        ByteBuffer testBytesUnion0 = ((ByteBuffer) data.get(14));
+        if (testBytesUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBytes(((ByteBuffer) testBytesUnion0));
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
new file mode 100644
index 000000000..cfdf0ad77
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union_field0 = ((Object) data.get(0));
+        if (union_field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record1".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeRecord10(((IndexedRecord) union_field0), (encoder), (customization));
+            } else {
+                if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                    (encoder).writeIndex(2);
+                    serializeRecord20(((IndexedRecord) union_field0), (encoder), (customization));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
new file mode 100644
index 000000000..494b57134
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> recordsArray0 = ((List<IndexedRecord> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArray0 == null)||recordsArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArray0 .size());
+            for (int counter0 = 0; (counter0 <recordsArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord subRecord0 = null;
+                subRecord0 = ((List<IndexedRecord> ) recordsArray0).get(counter0);
+                serializeSubRecord0(subRecord0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMap0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMap0 == null)||recordsMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) recordsMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord subRecord1 = null;
+                subRecord1 = ((Map<CharSequence, IndexedRecord> ) recordsMap0).get(key0);
+                serializeSubRecord0(subRecord1, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+        List<IndexedRecord> recordsArrayUnion0 = ((List<IndexedRecord> ) data.get(2));
+        if (recordsArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<IndexedRecord> ) recordsArrayUnion0) == null)||((List<IndexedRecord> ) recordsArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<IndexedRecord> ) recordsArrayUnion0).size());
+                    for (int counter1 = 0; (counter1 <((List<IndexedRecord> ) recordsArrayUnion0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union0 = null;
+                        union0 = ((List<IndexedRecord> )((List<IndexedRecord> ) recordsArrayUnion0)).get(counter1);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMapUnion0 = ((Map<CharSequence, IndexedRecord> ) data.get(3));
+        if (recordsMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, IndexedRecord> ) recordsMapUnion0) == null)||((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).size());
+                    for (CharSequence key1 : ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key1);
+                        IndexedRecord union1 = null;
+                        union1 = ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).get(key1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
new file mode 100644
index 000000000..e1132ea20
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
@@ -0,0 +1,230 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMap0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArrayMap0 == null)||recordsArrayMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArrayMap0 .size());
+            for (int counter0 = 0; (counter0 <recordsArrayMap0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Map<CharSequence, IndexedRecord> map0 = null;
+                map0 = ((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMap0).get(counter0);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(map0);
+                }
+                (encoder).writeMapStart();
+                if ((map0 == null)||map0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(map0 .size());
+                    for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) map0).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        IndexedRecord union0 = null;
+                        union0 = ((Map<CharSequence, IndexedRecord> ) map0).get(key0);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMapArray0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMapArray0 == null)||recordsMapArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMapArray0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                List<IndexedRecord> array0 = null;
+                array0 = ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).get(key1);
+                (encoder).writeArrayStart();
+                if ((array0 == null)||array0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(array0 .size());
+                    for (int counter1 = 0; (counter1 <array0 .size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union1 = null;
+                        union1 = ((List<IndexedRecord> ) array0).get(counter1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        (encoder).writeMapEnd();
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMapUnion0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(2));
+        if (recordsArrayMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayMapUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0) == null)||((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size());
+                    for (int counter2 = 0; (counter2 <((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size()); counter2 ++) {
+                        (encoder).startItem();
+                        Map<CharSequence, IndexedRecord> map1 = null;
+                        map1 = ((List<Map<CharSequence, IndexedRecord>> )((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0)).get(counter2);
+                        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                            (customization).getCheckMapTypeFunction().apply(map1);
+                        }
+                        (encoder).writeMapStart();
+                        if ((map1 == null)||map1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(map1 .size());
+                            for (CharSequence key2 : ((Map<CharSequence, IndexedRecord> ) map1).keySet()) {
+                                (encoder).startItem();
+                                (encoder).writeString(key2);
+                                IndexedRecord union2 = null;
+                                union2 = ((Map<CharSequence, IndexedRecord> ) map1).get(key2);
+                                if (union2 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union2 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union2).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union2), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeMapEnd();
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArrayUnion0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(3));
+        if (recordsMapArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapArrayUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0) == null)||((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).size());
+                    for (CharSequence key3 : ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key3);
+                        List<IndexedRecord> array1 = null;
+                        array1 = ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).get(key3);
+                        (encoder).writeArrayStart();
+                        if ((array1 == null)||array1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(array1 .size());
+                            for (int counter3 = 0; (counter3 <array1 .size()); counter3 ++) {
+                                (encoder).startItem();
+                                IndexedRecord union3 = null;
+                                union3 = ((List<IndexedRecord> ) array1).get(counter3);
+                                if (union3 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union3 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union3).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union3), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeArrayEnd();
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
new file mode 100644
index 000000000..842de6e59
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record0 = ((IndexedRecord) data.get(0));
+        if (record0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((record0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) record0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) record0), (encoder), (customization));
+            }
+        }
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record10 = ((IndexedRecord) data.get(1));
+        serializeSubRecord0(record10, (encoder), (customization));
+        CharSequence field0 = ((CharSequence) data.get(2));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastSerdeEnums_GenericSerializer_957378572.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastSerdeEnums_GenericSerializer_957378572.java
new file mode 100644
index 000000000..a40332169
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastSerdeEnums_GenericSerializer_957378572.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeEnums_GenericSerializer_957378572
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> arrayOfEnums0 = ((List<GenericEnumSymbol> ) data.get(1));
+        if (arrayOfEnums0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfEnums0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericEnumSymbol> ) arrayOfEnums0) == null)||((List<GenericEnumSymbol> ) arrayOfEnums0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericEnumSymbol> ) arrayOfEnums0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericEnumSymbol> ) arrayOfEnums0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        int valueToWrite1;
+                        Object enumValue1 = ((List<GenericEnumSymbol> ) arrayOfEnums0).get(counter0);
+                        if (enumValue1 instanceof Enum) {
+                            valueToWrite1 = ((Enum) enumValue1).ordinal();
+                        } else {
+                            valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite1);
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericEnumSymbol> mapOfEnums0 = ((Map<CharSequence, GenericEnumSymbol> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfEnums0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfEnums0 == null)||mapOfEnums0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfEnums0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericEnumSymbol> ) mapOfEnums0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                int valueToWrite2;
+                Object enumValue2 = mapOfEnums0 .get(key0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastSerdeFixed_GenericSerializer_504108934.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastSerdeFixed_GenericSerializer_504108934.java
new file mode 100644
index 000000000..41699d954
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastSerdeFixed_GenericSerializer_504108934.java
@@ -0,0 +1,74 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeFixed_GenericSerializer_504108934
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> arrayOfFixed0 = ((List<GenericFixed> ) data.get(1));
+        if (arrayOfFixed0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfFixed0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericFixed> ) arrayOfFixed0) == null)||((List<GenericFixed> ) arrayOfFixed0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericFixed> ) arrayOfFixed0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericFixed> ) arrayOfFixed0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFixed(((GenericFixed)((List<GenericFixed> ) arrayOfFixed0).get(counter0)).bytes());
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericFixed> mapOfFixed0 = ((Map<CharSequence, GenericFixed> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfFixed0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfFixed0 == null)||mapOfFixed0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfFixed0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericFixed> ) mapOfFixed0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                (encoder).writeFixed(((GenericFixed) mapOfFixed0 .get(key0)).bytes());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
new file mode 100644
index 000000000..dae6fb2f8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
new file mode 100644
index 000000000..c93145ab5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Map_of_UNION_GenericSerializer_2140000109.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Map_of_UNION_GenericSerializer_2140000109.java
new file mode 100644
index 000000000..278a922f7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Map_of_UNION_GenericSerializer_2140000109.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericSerializer_2140000109
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord union0 = null;
+                union0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Map_of_record_GenericSerializer_1677529043.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Map_of_record_GenericSerializer_1677529043.java
new file mode 100644
index 000000000..f813fd327
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/Map_of_record_GenericSerializer_1677529043.java
@@ -0,0 +1,57 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericSerializer_1677529043
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord record0 = null;
+                record0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/StringableRecord_SpecificSerializer_842267318.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/StringableRecord_SpecificSerializer_842267318.java
new file mode 100644
index 000000000..5ed569362
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/StringableRecord_SpecificSerializer_842267318.java
@@ -0,0 +1,189 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableSubRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificSerializer_842267318
+    implements FastSerializer<StringableRecord>
+{
+
+
+    public void serialize(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeStringableRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_StringableRecord0(data, (encoder), (customization));
+        serialize_StringableRecord1(data, (encoder), (customization));
+        serialize_StringableRecord2(data, (encoder), (customization));
+        serialize_StringableRecord3(data, (encoder), (customization));
+        serialize_StringableRecord4(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(1)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(1))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(1)).toString());
+        }
+        if (((CharSequence) data.get(2)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(2))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(2)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord1(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        if (((CharSequence) data.get(4)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(4))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(4)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord2(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<CharSequence> urlArray0 = ((List<CharSequence> ) data.get(5));
+        (encoder).writeArrayStart();
+        if ((urlArray0 == null)||urlArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlArray0 .size());
+            for (int counter0 = 0; (counter0 <urlArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (urlArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) urlArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(urlArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+        Map<CharSequence, CharSequence> urlMap0 = ((Map<CharSequence, CharSequence> ) data.get(6));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(urlMap0);
+        }
+        (encoder).writeMapStart();
+        if ((urlMap0 == null)||urlMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) urlMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) urlMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) urlMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) urlMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord3(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord0 = ((StringableSubRecord) data.get(7));
+        serializeStringableSubRecord0(subRecord0, (encoder), (customization));
+        AnotherSubRecord subRecordWithSubRecord0 = ((AnotherSubRecord) data.get(8));
+        serializeAnotherSubRecord0(subRecordWithSubRecord0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_StringableSubRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object nullStringIntUnion0 = ((Object) data.get(1));
+        if (nullStringIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullStringIntUnion0 instanceof CharSequence) {
+                (encoder).writeIndex(1);
+                if (((CharSequence) nullStringIntUnion0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) nullStringIntUnion0)));
+                } else {
+                    (encoder).writeString(((CharSequence) nullStringIntUnion0).toString());
+                }
+            } else {
+                if (nullStringIntUnion0 instanceof Integer) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeInt(((Integer) nullStringIntUnion0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord1 = ((StringableSubRecord) data.get(0));
+        serializeStringableSubRecord0(subRecord1, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord4(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence stringUnion0 = ((CharSequence) data.get(9));
+        if (stringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) stringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) stringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) stringUnion0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/TestArrayOfFloats_GenericSerializer_1408566797.java b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/TestArrayOfFloats_GenericSerializer_1408566797.java
new file mode 100644
index 000000000..4a9ed2aab
--- /dev/null
+++ b/fastserde/avro-fastserde-tests15/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_5/TestArrayOfFloats_GenericSerializer_1408566797.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_5;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class TestArrayOfFloats_GenericSerializer_1408566797
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeTestArrayOfFloats0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Float> array_of_float0 = ((List<Float> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((array_of_float0 == null)||array_of_float0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(array_of_float0 .size());
+            Object array0 = array_of_float0;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <array_of_float0 .size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(array_of_float0 .get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
new file mode 100644
index 000000000..1f9b828f2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_BOOLEAN_GenericDeserializer_869749973_869749973
+    implements FastDeserializer<List<Boolean>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_BOOLEAN_GenericDeserializer_869749973_869749973(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveBooleanList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveBooleanList) {
+            array0 = ((PrimitiveBooleanList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveBooleanArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
new file mode 100644
index 000000000..4e5537728
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_DOUBLE_GenericDeserializer_18760307_18760307
+    implements FastDeserializer<List<Double>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_DOUBLE_GenericDeserializer_18760307_18760307(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Double> deserialize(List<Double> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveDoubleList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveDoubleList) {
+            array0 = ((PrimitiveDoubleList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveDoubleArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
new file mode 100644
index 000000000..291ed356d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
@@ -0,0 +1,31 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_FLOAT_GenericDeserializer_1012670397_1012670397
+    implements FastDeserializer<List<Float>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_FLOAT_GenericDeserializer_1012670397_1012670397(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Float> deserialize(List<Float> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveFloatList array0 = null;
+        array0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray((reuse), (decoder)));
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_INT_GenericDeserializer_1012089072_1012089072.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
new file mode 100644
index 000000000..6540132ce
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_INT_GenericDeserializer_1012089072_1012089072
+    implements FastDeserializer<List<Integer>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_INT_GenericDeserializer_1012089072_1012089072(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Integer> deserialize(List<Integer> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveIntList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveIntList) {
+            array0 = ((PrimitiveIntList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_LONG_GenericDeserializer_325099267_325099267.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_LONG_GenericDeserializer_325099267_325099267.java
new file mode 100644
index 000000000..cb19b49fd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_LONG_GenericDeserializer_325099267_325099267.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_LONG_GenericDeserializer_325099267_325099267
+    implements FastDeserializer<List<Long>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_LONG_GenericDeserializer_325099267_325099267(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Long> deserialize(List<Long> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveLongList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveLongList) {
+            array0 = ((PrimitiveLongList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveLongArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
new file mode 100644
index 000000000..7cc80e124
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
@@ -0,0 +1,1058 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_UNION_GenericDeserializer_777827233_777827233.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_UNION_GenericDeserializer_777827233_777827233.java
new file mode 100644
index 000000000..bed1666d9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_UNION_GenericDeserializer_777827233_777827233.java
@@ -0,0 +1,94 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericDeserializer_777827233_777827233
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema arrayElemOptionSchema0;
+    private final Schema field0;
+
+    public Array_of_UNION_GenericDeserializer_777827233_777827233(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.arrayElemOptionSchema0 = arrayArrayElemSchema0 .getTypes().get(1);
+        this.field0 = arrayElemOptionSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayElemOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayElemOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
new file mode 100644
index 000000000..e63ca8675
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
@@ -0,0 +1,1068 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_SpecificDeserializer_1277939469_1277939469
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_UNION_SpecificDeserializer_1277939469_1277939469(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_record_GenericDeserializer_1606337179_2018567528.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_record_GenericDeserializer_1606337179_2018567528.java
new file mode 100644
index 000000000..40af7d2f1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_record_GenericDeserializer_1606337179_2018567528.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_record_GenericDeserializer_1606337179_2018567528
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionArrayElemSchema0;
+
+    public Array_of_record_GenericDeserializer_1606337179_2018567528(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionArrayElemSchema0 = readerSchema.getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                List<IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                if ((reuse) instanceof List) {
+                    unionOption0 = ((List)(reuse));
+                    unionOption0 .clear();
+                } else {
+                    unionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object unionOptionArrayElementReuseVar0 = null;
+                        if ((reuse) instanceof GenericArray) {
+                            unionOptionArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                        }
+                        unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder), (customization)));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_record_GenericDeserializer_477614132_477614132.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_record_GenericDeserializer_477614132_477614132.java
new file mode 100644
index 000000000..473705cb4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Array_of_record_GenericDeserializer_477614132_477614132.java
@@ -0,0 +1,82 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericDeserializer_477614132_477614132
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema field0;
+
+    public Array_of_record_GenericDeserializer_477614132_477614132(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.field0 = arrayArrayElemSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
new file mode 100644
index 000000000..9a4091e9c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
@@ -0,0 +1,23040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema f00;
+    private final Schema f10;
+    private final Schema f20;
+    private final Schema f30;
+    private final Schema f40;
+    private final Schema f50;
+    private final Schema f60;
+    private final Schema f70;
+    private final Schema f80;
+    private final Schema f90;
+    private final Schema f100;
+    private final Schema f110;
+    private final Schema f120;
+    private final Schema f130;
+    private final Schema f140;
+    private final Schema f150;
+    private final Schema f160;
+    private final Schema f170;
+    private final Schema f180;
+    private final Schema f190;
+    private final Schema f200;
+    private final Schema f210;
+    private final Schema f220;
+    private final Schema f230;
+    private final Schema f240;
+    private final Schema f250;
+    private final Schema f260;
+    private final Schema f270;
+    private final Schema f280;
+    private final Schema f290;
+    private final Schema f300;
+    private final Schema f310;
+    private final Schema f320;
+    private final Schema f330;
+    private final Schema f340;
+    private final Schema f350;
+    private final Schema f360;
+    private final Schema f370;
+    private final Schema f380;
+    private final Schema f390;
+    private final Schema f400;
+    private final Schema f410;
+    private final Schema f420;
+    private final Schema f430;
+    private final Schema f440;
+    private final Schema f450;
+    private final Schema f460;
+    private final Schema f470;
+    private final Schema f480;
+    private final Schema f490;
+    private final Schema f500;
+    private final Schema f510;
+    private final Schema f520;
+    private final Schema f530;
+    private final Schema f540;
+    private final Schema f550;
+    private final Schema f560;
+    private final Schema f570;
+    private final Schema f580;
+    private final Schema f590;
+    private final Schema f600;
+    private final Schema f610;
+    private final Schema f620;
+    private final Schema f630;
+    private final Schema f640;
+    private final Schema f650;
+    private final Schema f660;
+    private final Schema f670;
+    private final Schema f680;
+    private final Schema f690;
+    private final Schema f700;
+    private final Schema f710;
+    private final Schema f720;
+    private final Schema f730;
+    private final Schema f740;
+    private final Schema f750;
+    private final Schema f760;
+    private final Schema f770;
+    private final Schema f780;
+    private final Schema f790;
+    private final Schema f800;
+    private final Schema f810;
+    private final Schema f820;
+    private final Schema f830;
+    private final Schema f840;
+    private final Schema f850;
+    private final Schema f860;
+    private final Schema f870;
+    private final Schema f880;
+    private final Schema f890;
+    private final Schema f900;
+    private final Schema f910;
+    private final Schema f920;
+    private final Schema f930;
+    private final Schema f940;
+    private final Schema f950;
+    private final Schema f960;
+    private final Schema f970;
+    private final Schema f980;
+    private final Schema f990;
+    private final Schema f1000;
+    private final Schema f1010;
+    private final Schema f1020;
+    private final Schema f1030;
+    private final Schema f1040;
+    private final Schema f1050;
+    private final Schema f1060;
+    private final Schema f1070;
+    private final Schema f1080;
+    private final Schema f1090;
+    private final Schema f1100;
+    private final Schema f1110;
+    private final Schema f1120;
+    private final Schema f1130;
+    private final Schema f1140;
+    private final Schema f1150;
+    private final Schema f1160;
+    private final Schema f1170;
+    private final Schema f1180;
+    private final Schema f1190;
+    private final Schema f1200;
+    private final Schema f1210;
+    private final Schema f1220;
+    private final Schema f1230;
+    private final Schema f1240;
+    private final Schema f1250;
+    private final Schema f1260;
+    private final Schema f1270;
+    private final Schema f1280;
+    private final Schema f1290;
+    private final Schema f1300;
+    private final Schema f1310;
+    private final Schema f1320;
+    private final Schema f1330;
+    private final Schema f1340;
+    private final Schema f1350;
+    private final Schema f1360;
+    private final Schema f1370;
+    private final Schema f1380;
+    private final Schema f1390;
+    private final Schema f1400;
+    private final Schema f1410;
+    private final Schema f1420;
+    private final Schema f1430;
+    private final Schema f1440;
+    private final Schema f1450;
+    private final Schema f1460;
+    private final Schema f1470;
+    private final Schema f1480;
+    private final Schema f1490;
+    private final Schema f1500;
+    private final Schema f1510;
+    private final Schema f1520;
+    private final Schema f1530;
+    private final Schema f1540;
+    private final Schema f1550;
+    private final Schema f1560;
+    private final Schema f1570;
+    private final Schema f1580;
+    private final Schema f1590;
+    private final Schema f1600;
+    private final Schema f1610;
+    private final Schema f1620;
+    private final Schema f1630;
+    private final Schema f1640;
+    private final Schema f1650;
+    private final Schema f1660;
+    private final Schema f1670;
+    private final Schema f1680;
+    private final Schema f1690;
+    private final Schema f1700;
+    private final Schema f1710;
+    private final Schema f1720;
+    private final Schema f1730;
+    private final Schema f1740;
+    private final Schema f1750;
+    private final Schema f1760;
+    private final Schema f1770;
+    private final Schema f1780;
+    private final Schema f1790;
+    private final Schema f1800;
+    private final Schema f1810;
+    private final Schema f1820;
+    private final Schema f1830;
+    private final Schema f1840;
+    private final Schema f1850;
+    private final Schema f1860;
+    private final Schema f1870;
+    private final Schema f1880;
+    private final Schema f1890;
+    private final Schema f1900;
+    private final Schema f1910;
+    private final Schema f1920;
+    private final Schema f1930;
+    private final Schema f1940;
+    private final Schema f1950;
+    private final Schema f1960;
+    private final Schema f1970;
+    private final Schema f1980;
+    private final Schema f1990;
+    private final Schema f2000;
+    private final Schema f2010;
+    private final Schema f2020;
+    private final Schema f2030;
+    private final Schema f2040;
+    private final Schema f2050;
+    private final Schema f2060;
+    private final Schema f2070;
+    private final Schema f2080;
+    private final Schema f2090;
+    private final Schema f2100;
+    private final Schema f2110;
+    private final Schema f2120;
+    private final Schema f2130;
+    private final Schema f2140;
+    private final Schema f2150;
+    private final Schema f2160;
+    private final Schema f2170;
+    private final Schema f2180;
+    private final Schema f2190;
+    private final Schema f2200;
+    private final Schema f2210;
+    private final Schema f2220;
+    private final Schema f2230;
+    private final Schema f2240;
+    private final Schema f2250;
+    private final Schema f2260;
+    private final Schema f2270;
+    private final Schema f2280;
+    private final Schema f2290;
+    private final Schema f2300;
+    private final Schema f2310;
+    private final Schema f2320;
+    private final Schema f2330;
+    private final Schema f2340;
+    private final Schema f2350;
+    private final Schema f2360;
+    private final Schema f2370;
+    private final Schema f2380;
+    private final Schema f2390;
+    private final Schema f2400;
+    private final Schema f2410;
+    private final Schema f2420;
+    private final Schema f2430;
+    private final Schema f2440;
+    private final Schema f2450;
+    private final Schema f2460;
+    private final Schema f2470;
+    private final Schema f2480;
+    private final Schema f2490;
+    private final Schema f2500;
+    private final Schema f2510;
+    private final Schema f2520;
+    private final Schema f2530;
+    private final Schema f2540;
+    private final Schema f2550;
+    private final Schema f2560;
+    private final Schema f2570;
+    private final Schema f2580;
+    private final Schema f2590;
+    private final Schema f2600;
+    private final Schema f2610;
+    private final Schema f2620;
+    private final Schema f2630;
+    private final Schema f2640;
+    private final Schema f2650;
+    private final Schema f2660;
+    private final Schema f2670;
+    private final Schema f2680;
+    private final Schema f2690;
+    private final Schema f2700;
+    private final Schema f2710;
+    private final Schema f2720;
+    private final Schema f2730;
+    private final Schema f2740;
+    private final Schema f2750;
+    private final Schema f2760;
+    private final Schema f2770;
+    private final Schema f2780;
+    private final Schema f2790;
+    private final Schema f2800;
+    private final Schema f2810;
+    private final Schema f2820;
+    private final Schema f2830;
+    private final Schema f2840;
+    private final Schema f2850;
+    private final Schema f2860;
+    private final Schema f2870;
+    private final Schema f2880;
+    private final Schema f2890;
+    private final Schema f2900;
+    private final Schema f2910;
+    private final Schema f2920;
+    private final Schema f2930;
+    private final Schema f2940;
+    private final Schema f2950;
+    private final Schema f2960;
+    private final Schema f2970;
+    private final Schema f2980;
+    private final Schema f2990;
+    private final Schema f3000;
+    private final Schema f3010;
+    private final Schema f3020;
+    private final Schema f3030;
+    private final Schema f3040;
+    private final Schema f3050;
+    private final Schema f3060;
+    private final Schema f3070;
+    private final Schema f3080;
+    private final Schema f3090;
+    private final Schema f3100;
+    private final Schema f3110;
+    private final Schema f3120;
+    private final Schema f3130;
+    private final Schema f3140;
+    private final Schema f3150;
+    private final Schema f3160;
+    private final Schema f3170;
+    private final Schema f3180;
+    private final Schema f3190;
+    private final Schema f3200;
+    private final Schema f3210;
+    private final Schema f3220;
+    private final Schema f3230;
+    private final Schema f3240;
+    private final Schema f3250;
+    private final Schema f3260;
+    private final Schema f3270;
+    private final Schema f3280;
+    private final Schema f3290;
+    private final Schema f3300;
+    private final Schema f3310;
+    private final Schema f3320;
+    private final Schema f3330;
+    private final Schema f3340;
+    private final Schema f3350;
+    private final Schema f3360;
+    private final Schema f3370;
+    private final Schema f3380;
+    private final Schema f3390;
+    private final Schema f3400;
+    private final Schema f3410;
+    private final Schema f3420;
+    private final Schema f3430;
+    private final Schema f3440;
+    private final Schema f3450;
+    private final Schema f3460;
+    private final Schema f3470;
+    private final Schema f3480;
+    private final Schema f3490;
+    private final Schema f3500;
+    private final Schema f3510;
+    private final Schema f3520;
+    private final Schema f3530;
+    private final Schema f3540;
+    private final Schema f3550;
+    private final Schema f3560;
+    private final Schema f3570;
+    private final Schema f3580;
+    private final Schema f3590;
+    private final Schema f3600;
+    private final Schema f3610;
+    private final Schema f3620;
+    private final Schema f3630;
+    private final Schema f3640;
+    private final Schema f3650;
+    private final Schema f3660;
+    private final Schema f3670;
+    private final Schema f3680;
+    private final Schema f3690;
+    private final Schema f3700;
+    private final Schema f3710;
+    private final Schema f3720;
+    private final Schema f3730;
+    private final Schema f3740;
+    private final Schema f3750;
+    private final Schema f3760;
+    private final Schema f3770;
+    private final Schema f3780;
+    private final Schema f3790;
+    private final Schema f3800;
+    private final Schema f3810;
+    private final Schema f3820;
+    private final Schema f3830;
+    private final Schema f3840;
+    private final Schema f3850;
+    private final Schema f3860;
+    private final Schema f3870;
+    private final Schema f3880;
+    private final Schema f3890;
+    private final Schema f3900;
+    private final Schema f3910;
+    private final Schema f3920;
+    private final Schema f3930;
+    private final Schema f3940;
+    private final Schema f3950;
+    private final Schema f3960;
+    private final Schema f3970;
+    private final Schema f3980;
+    private final Schema f3990;
+    private final Schema f4000;
+    private final Schema f4010;
+    private final Schema f4020;
+    private final Schema f4030;
+    private final Schema f4040;
+    private final Schema f4050;
+    private final Schema f4060;
+    private final Schema f4070;
+    private final Schema f4080;
+    private final Schema f4090;
+    private final Schema f4100;
+    private final Schema f4110;
+    private final Schema f4120;
+    private final Schema f4130;
+    private final Schema f4140;
+    private final Schema f4150;
+    private final Schema f4160;
+    private final Schema f4170;
+    private final Schema f4180;
+    private final Schema f4190;
+    private final Schema f4200;
+    private final Schema f4210;
+    private final Schema f4220;
+    private final Schema f4230;
+    private final Schema f4240;
+    private final Schema f4250;
+    private final Schema f4260;
+    private final Schema f4270;
+    private final Schema f4280;
+    private final Schema f4290;
+    private final Schema f4300;
+    private final Schema f4310;
+    private final Schema f4320;
+    private final Schema f4330;
+    private final Schema f4340;
+    private final Schema f4350;
+    private final Schema f4360;
+    private final Schema f4370;
+    private final Schema f4380;
+    private final Schema f4390;
+    private final Schema f4400;
+    private final Schema f4410;
+    private final Schema f4420;
+    private final Schema f4430;
+    private final Schema f4440;
+    private final Schema f4450;
+    private final Schema f4460;
+    private final Schema f4470;
+    private final Schema f4480;
+    private final Schema f4490;
+    private final Schema f4500;
+    private final Schema f4510;
+    private final Schema f4520;
+    private final Schema f4530;
+    private final Schema f4540;
+    private final Schema f4550;
+    private final Schema f4560;
+    private final Schema f4570;
+    private final Schema f4580;
+    private final Schema f4590;
+    private final Schema f4600;
+    private final Schema f4610;
+    private final Schema f4620;
+    private final Schema f4630;
+    private final Schema f4640;
+    private final Schema f4650;
+    private final Schema f4660;
+    private final Schema f4670;
+    private final Schema f4680;
+    private final Schema f4690;
+    private final Schema f4700;
+    private final Schema f4710;
+    private final Schema f4720;
+    private final Schema f4730;
+    private final Schema f4740;
+    private final Schema f4750;
+    private final Schema f4760;
+    private final Schema f4770;
+    private final Schema f4780;
+    private final Schema f4790;
+    private final Schema f4800;
+    private final Schema f4810;
+    private final Schema f4820;
+    private final Schema f4830;
+    private final Schema f4840;
+    private final Schema f4850;
+    private final Schema f4860;
+    private final Schema f4870;
+    private final Schema f4880;
+    private final Schema f4890;
+    private final Schema f4900;
+    private final Schema f4910;
+    private final Schema f4920;
+    private final Schema f4930;
+    private final Schema f4940;
+    private final Schema f4950;
+    private final Schema f4960;
+    private final Schema f4970;
+    private final Schema f4980;
+    private final Schema f4990;
+    private final Schema f5000;
+    private final Schema f5010;
+    private final Schema f5020;
+    private final Schema f5030;
+    private final Schema f5040;
+    private final Schema f5050;
+    private final Schema f5060;
+    private final Schema f5070;
+    private final Schema f5080;
+    private final Schema f5090;
+    private final Schema f5100;
+    private final Schema f5110;
+    private final Schema f5120;
+    private final Schema f5130;
+    private final Schema f5140;
+    private final Schema f5150;
+    private final Schema f5160;
+    private final Schema f5170;
+    private final Schema f5180;
+    private final Schema f5190;
+    private final Schema f5200;
+    private final Schema f5210;
+    private final Schema f5220;
+    private final Schema f5230;
+    private final Schema f5240;
+    private final Schema f5250;
+    private final Schema f5260;
+    private final Schema f5270;
+    private final Schema f5280;
+    private final Schema f5290;
+    private final Schema f5300;
+    private final Schema f5310;
+    private final Schema f5320;
+    private final Schema f5330;
+    private final Schema f5340;
+    private final Schema f5350;
+    private final Schema f5360;
+    private final Schema f5370;
+    private final Schema f5380;
+    private final Schema f5390;
+    private final Schema f5400;
+    private final Schema f5410;
+    private final Schema f5420;
+    private final Schema f5430;
+    private final Schema f5440;
+    private final Schema f5450;
+    private final Schema f5460;
+    private final Schema f5470;
+    private final Schema f5480;
+    private final Schema f5490;
+    private final Schema f5500;
+    private final Schema f5510;
+    private final Schema f5520;
+    private final Schema f5530;
+    private final Schema f5540;
+    private final Schema f5550;
+    private final Schema f5560;
+    private final Schema f5570;
+    private final Schema f5580;
+    private final Schema f5590;
+    private final Schema f5600;
+    private final Schema f5610;
+    private final Schema f5620;
+    private final Schema f5630;
+    private final Schema f5640;
+    private final Schema f5650;
+    private final Schema f5660;
+    private final Schema f5670;
+    private final Schema f5680;
+    private final Schema f5690;
+    private final Schema f5700;
+    private final Schema f5710;
+    private final Schema f5720;
+    private final Schema f5730;
+    private final Schema f5740;
+    private final Schema f5750;
+    private final Schema f5760;
+    private final Schema f5770;
+    private final Schema f5780;
+    private final Schema f5790;
+    private final Schema f5800;
+    private final Schema f5810;
+    private final Schema f5820;
+    private final Schema f5830;
+    private final Schema f5840;
+    private final Schema f5850;
+    private final Schema f5860;
+    private final Schema f5870;
+    private final Schema f5880;
+    private final Schema f5890;
+    private final Schema f5900;
+    private final Schema f5910;
+    private final Schema f5920;
+    private final Schema f5930;
+    private final Schema f5940;
+    private final Schema f5950;
+    private final Schema f5960;
+    private final Schema f5970;
+    private final Schema f5980;
+    private final Schema f5990;
+    private final Schema f6000;
+    private final Schema f6010;
+    private final Schema f6020;
+    private final Schema f6030;
+    private final Schema f6040;
+    private final Schema f6050;
+    private final Schema f6060;
+    private final Schema f6070;
+    private final Schema f6080;
+    private final Schema f6090;
+    private final Schema f6100;
+    private final Schema f6110;
+    private final Schema f6120;
+    private final Schema f6130;
+    private final Schema f6140;
+    private final Schema f6150;
+    private final Schema f6160;
+    private final Schema f6170;
+    private final Schema f6180;
+    private final Schema f6190;
+    private final Schema f6200;
+    private final Schema f6210;
+    private final Schema f6220;
+    private final Schema f6230;
+    private final Schema f6240;
+    private final Schema f6250;
+    private final Schema f6260;
+    private final Schema f6270;
+    private final Schema f6280;
+    private final Schema f6290;
+    private final Schema f6300;
+    private final Schema f6310;
+    private final Schema f6320;
+    private final Schema f6330;
+    private final Schema f6340;
+    private final Schema f6350;
+    private final Schema f6360;
+    private final Schema f6370;
+    private final Schema f6380;
+    private final Schema f6390;
+    private final Schema f6400;
+    private final Schema f6410;
+    private final Schema f6420;
+    private final Schema f6430;
+    private final Schema f6440;
+    private final Schema f6450;
+    private final Schema f6460;
+    private final Schema f6470;
+    private final Schema f6480;
+    private final Schema f6490;
+    private final Schema f6500;
+    private final Schema f6510;
+    private final Schema f6520;
+    private final Schema f6530;
+    private final Schema f6540;
+    private final Schema f6550;
+    private final Schema f6560;
+    private final Schema f6570;
+    private final Schema f6580;
+    private final Schema f6590;
+    private final Schema f6600;
+    private final Schema f6610;
+    private final Schema f6620;
+    private final Schema f6630;
+    private final Schema f6640;
+    private final Schema f6650;
+    private final Schema f6660;
+    private final Schema f6670;
+    private final Schema f6680;
+    private final Schema f6690;
+    private final Schema f6700;
+    private final Schema f6710;
+    private final Schema f6720;
+    private final Schema f6730;
+    private final Schema f6740;
+    private final Schema f6750;
+    private final Schema f6760;
+    private final Schema f6770;
+    private final Schema f6780;
+    private final Schema f6790;
+    private final Schema f6800;
+    private final Schema f6810;
+    private final Schema f6820;
+    private final Schema f6830;
+    private final Schema f6840;
+    private final Schema f6850;
+    private final Schema f6860;
+    private final Schema f6870;
+    private final Schema f6880;
+    private final Schema f6890;
+    private final Schema f6900;
+    private final Schema f6910;
+    private final Schema f6920;
+    private final Schema f6930;
+    private final Schema f6940;
+    private final Schema f6950;
+    private final Schema f6960;
+    private final Schema f6970;
+    private final Schema f6980;
+    private final Schema f6990;
+    private final Schema f7000;
+    private final Schema f7010;
+    private final Schema f7020;
+    private final Schema f7030;
+    private final Schema f7040;
+    private final Schema f7050;
+    private final Schema f7060;
+    private final Schema f7070;
+    private final Schema f7080;
+    private final Schema f7090;
+    private final Schema f7100;
+    private final Schema f7110;
+    private final Schema f7120;
+    private final Schema f7130;
+    private final Schema f7140;
+    private final Schema f7150;
+    private final Schema f7160;
+    private final Schema f7170;
+    private final Schema f7180;
+    private final Schema f7190;
+    private final Schema f7200;
+    private final Schema f7210;
+    private final Schema f7220;
+    private final Schema f7230;
+    private final Schema f7240;
+    private final Schema f7250;
+    private final Schema f7260;
+    private final Schema f7270;
+    private final Schema f7280;
+    private final Schema f7290;
+    private final Schema f7300;
+    private final Schema f7310;
+    private final Schema f7320;
+    private final Schema f7330;
+    private final Schema f7340;
+    private final Schema f7350;
+    private final Schema f7360;
+    private final Schema f7370;
+    private final Schema f7380;
+    private final Schema f7390;
+    private final Schema f7400;
+    private final Schema f7410;
+    private final Schema f7420;
+    private final Schema f7430;
+    private final Schema f7440;
+    private final Schema f7450;
+    private final Schema f7460;
+    private final Schema f7470;
+    private final Schema f7480;
+    private final Schema f7490;
+    private final Schema f7500;
+    private final Schema f7510;
+    private final Schema f7520;
+    private final Schema f7530;
+    private final Schema f7540;
+    private final Schema f7550;
+    private final Schema f7560;
+    private final Schema f7570;
+    private final Schema f7580;
+    private final Schema f7590;
+    private final Schema f7600;
+    private final Schema f7610;
+    private final Schema f7620;
+    private final Schema f7630;
+    private final Schema f7640;
+    private final Schema f7650;
+    private final Schema f7660;
+    private final Schema f7670;
+    private final Schema f7680;
+    private final Schema f7690;
+    private final Schema f7700;
+    private final Schema f7710;
+    private final Schema f7720;
+    private final Schema f7730;
+    private final Schema f7740;
+    private final Schema f7750;
+    private final Schema f7760;
+    private final Schema f7770;
+    private final Schema f7780;
+    private final Schema f7790;
+    private final Schema f7800;
+    private final Schema f7810;
+    private final Schema f7820;
+    private final Schema f7830;
+    private final Schema f7840;
+    private final Schema f7850;
+    private final Schema f7860;
+    private final Schema f7870;
+    private final Schema f7880;
+    private final Schema f7890;
+    private final Schema f7900;
+    private final Schema f7910;
+    private final Schema f7920;
+    private final Schema f7930;
+    private final Schema f7940;
+    private final Schema f7950;
+    private final Schema f7960;
+    private final Schema f7970;
+    private final Schema f7980;
+    private final Schema f7990;
+    private final Schema f8000;
+    private final Schema f8010;
+    private final Schema f8020;
+    private final Schema f8030;
+    private final Schema f8040;
+    private final Schema f8050;
+    private final Schema f8060;
+    private final Schema f8070;
+    private final Schema f8080;
+    private final Schema f8090;
+    private final Schema f8100;
+    private final Schema f8110;
+    private final Schema f8120;
+    private final Schema f8130;
+    private final Schema f8140;
+    private final Schema f8150;
+    private final Schema f8160;
+    private final Schema f8170;
+    private final Schema f8180;
+    private final Schema f8190;
+    private final Schema f8200;
+    private final Schema f8210;
+    private final Schema f8220;
+    private final Schema f8230;
+    private final Schema f8240;
+    private final Schema f8250;
+    private final Schema f8260;
+    private final Schema f8270;
+    private final Schema f8280;
+    private final Schema f8290;
+    private final Schema f8300;
+    private final Schema f8310;
+    private final Schema f8320;
+    private final Schema f8330;
+    private final Schema f8340;
+    private final Schema f8350;
+    private final Schema f8360;
+    private final Schema f8370;
+    private final Schema f8380;
+    private final Schema f8390;
+    private final Schema f8400;
+    private final Schema f8410;
+    private final Schema f8420;
+    private final Schema f8430;
+    private final Schema f8440;
+    private final Schema f8450;
+    private final Schema f8460;
+    private final Schema f8470;
+    private final Schema f8480;
+    private final Schema f8490;
+    private final Schema f8500;
+    private final Schema f8510;
+    private final Schema f8520;
+    private final Schema f8530;
+    private final Schema f8540;
+    private final Schema f8550;
+    private final Schema f8560;
+    private final Schema f8570;
+    private final Schema f8580;
+    private final Schema f8590;
+    private final Schema f8600;
+    private final Schema f8610;
+    private final Schema f8620;
+    private final Schema f8630;
+    private final Schema f8640;
+    private final Schema f8650;
+    private final Schema f8660;
+    private final Schema f8670;
+    private final Schema f8680;
+    private final Schema f8690;
+    private final Schema f8700;
+    private final Schema f8710;
+    private final Schema f8720;
+    private final Schema f8730;
+    private final Schema f8740;
+    private final Schema f8750;
+    private final Schema f8760;
+    private final Schema f8770;
+    private final Schema f8780;
+    private final Schema f8790;
+    private final Schema f8800;
+    private final Schema f8810;
+    private final Schema f8820;
+    private final Schema f8830;
+    private final Schema f8840;
+    private final Schema f8850;
+    private final Schema f8860;
+    private final Schema f8870;
+    private final Schema f8880;
+    private final Schema f8890;
+    private final Schema f8900;
+    private final Schema f8910;
+    private final Schema f8920;
+    private final Schema f8930;
+    private final Schema f8940;
+    private final Schema f8950;
+    private final Schema f8960;
+    private final Schema f8970;
+    private final Schema f8980;
+    private final Schema f8990;
+    private final Schema f9000;
+    private final Schema f9010;
+    private final Schema f9020;
+    private final Schema f9030;
+    private final Schema f9040;
+    private final Schema f9050;
+    private final Schema f9060;
+    private final Schema f9070;
+    private final Schema f9080;
+    private final Schema f9090;
+    private final Schema f9100;
+    private final Schema f9110;
+    private final Schema f9120;
+    private final Schema f9130;
+    private final Schema f9140;
+    private final Schema f9150;
+    private final Schema f9160;
+    private final Schema f9170;
+    private final Schema f9180;
+    private final Schema f9190;
+    private final Schema f9200;
+    private final Schema f9210;
+    private final Schema f9220;
+    private final Schema f9230;
+    private final Schema f9240;
+    private final Schema f9250;
+    private final Schema f9260;
+    private final Schema f9270;
+    private final Schema f9280;
+    private final Schema f9290;
+    private final Schema f9300;
+    private final Schema f9310;
+    private final Schema f9320;
+    private final Schema f9330;
+    private final Schema f9340;
+    private final Schema f9350;
+    private final Schema f9360;
+    private final Schema f9370;
+    private final Schema f9380;
+    private final Schema f9390;
+    private final Schema f9400;
+    private final Schema f9410;
+    private final Schema f9420;
+    private final Schema f9430;
+    private final Schema f9440;
+    private final Schema f9450;
+    private final Schema f9460;
+    private final Schema f9470;
+    private final Schema f9480;
+    private final Schema f9490;
+    private final Schema f9500;
+    private final Schema f9510;
+    private final Schema f9520;
+    private final Schema f9530;
+    private final Schema f9540;
+    private final Schema f9550;
+    private final Schema f9560;
+    private final Schema f9570;
+    private final Schema f9580;
+    private final Schema f9590;
+    private final Schema f9600;
+    private final Schema f9610;
+    private final Schema f9620;
+    private final Schema f9630;
+    private final Schema f9640;
+    private final Schema f9650;
+    private final Schema f9660;
+    private final Schema f9670;
+    private final Schema f9680;
+    private final Schema f9690;
+    private final Schema f9700;
+    private final Schema f9710;
+    private final Schema f9720;
+    private final Schema f9730;
+    private final Schema f9740;
+    private final Schema f9750;
+    private final Schema f9760;
+    private final Schema f9770;
+    private final Schema f9780;
+    private final Schema f9790;
+    private final Schema f9800;
+    private final Schema f9810;
+    private final Schema f9820;
+    private final Schema f9830;
+    private final Schema f9840;
+    private final Schema f9850;
+    private final Schema f9860;
+    private final Schema f9870;
+    private final Schema f9880;
+    private final Schema f9890;
+    private final Schema f9900;
+    private final Schema f9910;
+    private final Schema f9920;
+    private final Schema f9930;
+    private final Schema f9940;
+    private final Schema f9950;
+    private final Schema f9960;
+    private final Schema f9970;
+    private final Schema f9980;
+    private final Schema f9990;
+
+    public FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.f00 = readerSchema.getField("F0").schema();
+        this.f10 = readerSchema.getField("F1").schema();
+        this.f20 = readerSchema.getField("F2").schema();
+        this.f30 = readerSchema.getField("F3").schema();
+        this.f40 = readerSchema.getField("F4").schema();
+        this.f50 = readerSchema.getField("F5").schema();
+        this.f60 = readerSchema.getField("F6").schema();
+        this.f70 = readerSchema.getField("F7").schema();
+        this.f80 = readerSchema.getField("F8").schema();
+        this.f90 = readerSchema.getField("F9").schema();
+        this.f100 = readerSchema.getField("F10").schema();
+        this.f110 = readerSchema.getField("F11").schema();
+        this.f120 = readerSchema.getField("F12").schema();
+        this.f130 = readerSchema.getField("F13").schema();
+        this.f140 = readerSchema.getField("F14").schema();
+        this.f150 = readerSchema.getField("F15").schema();
+        this.f160 = readerSchema.getField("F16").schema();
+        this.f170 = readerSchema.getField("F17").schema();
+        this.f180 = readerSchema.getField("F18").schema();
+        this.f190 = readerSchema.getField("F19").schema();
+        this.f200 = readerSchema.getField("F20").schema();
+        this.f210 = readerSchema.getField("F21").schema();
+        this.f220 = readerSchema.getField("F22").schema();
+        this.f230 = readerSchema.getField("F23").schema();
+        this.f240 = readerSchema.getField("F24").schema();
+        this.f250 = readerSchema.getField("F25").schema();
+        this.f260 = readerSchema.getField("F26").schema();
+        this.f270 = readerSchema.getField("F27").schema();
+        this.f280 = readerSchema.getField("F28").schema();
+        this.f290 = readerSchema.getField("F29").schema();
+        this.f300 = readerSchema.getField("F30").schema();
+        this.f310 = readerSchema.getField("F31").schema();
+        this.f320 = readerSchema.getField("F32").schema();
+        this.f330 = readerSchema.getField("F33").schema();
+        this.f340 = readerSchema.getField("F34").schema();
+        this.f350 = readerSchema.getField("F35").schema();
+        this.f360 = readerSchema.getField("F36").schema();
+        this.f370 = readerSchema.getField("F37").schema();
+        this.f380 = readerSchema.getField("F38").schema();
+        this.f390 = readerSchema.getField("F39").schema();
+        this.f400 = readerSchema.getField("F40").schema();
+        this.f410 = readerSchema.getField("F41").schema();
+        this.f420 = readerSchema.getField("F42").schema();
+        this.f430 = readerSchema.getField("F43").schema();
+        this.f440 = readerSchema.getField("F44").schema();
+        this.f450 = readerSchema.getField("F45").schema();
+        this.f460 = readerSchema.getField("F46").schema();
+        this.f470 = readerSchema.getField("F47").schema();
+        this.f480 = readerSchema.getField("F48").schema();
+        this.f490 = readerSchema.getField("F49").schema();
+        this.f500 = readerSchema.getField("F50").schema();
+        this.f510 = readerSchema.getField("F51").schema();
+        this.f520 = readerSchema.getField("F52").schema();
+        this.f530 = readerSchema.getField("F53").schema();
+        this.f540 = readerSchema.getField("F54").schema();
+        this.f550 = readerSchema.getField("F55").schema();
+        this.f560 = readerSchema.getField("F56").schema();
+        this.f570 = readerSchema.getField("F57").schema();
+        this.f580 = readerSchema.getField("F58").schema();
+        this.f590 = readerSchema.getField("F59").schema();
+        this.f600 = readerSchema.getField("F60").schema();
+        this.f610 = readerSchema.getField("F61").schema();
+        this.f620 = readerSchema.getField("F62").schema();
+        this.f630 = readerSchema.getField("F63").schema();
+        this.f640 = readerSchema.getField("F64").schema();
+        this.f650 = readerSchema.getField("F65").schema();
+        this.f660 = readerSchema.getField("F66").schema();
+        this.f670 = readerSchema.getField("F67").schema();
+        this.f680 = readerSchema.getField("F68").schema();
+        this.f690 = readerSchema.getField("F69").schema();
+        this.f700 = readerSchema.getField("F70").schema();
+        this.f710 = readerSchema.getField("F71").schema();
+        this.f720 = readerSchema.getField("F72").schema();
+        this.f730 = readerSchema.getField("F73").schema();
+        this.f740 = readerSchema.getField("F74").schema();
+        this.f750 = readerSchema.getField("F75").schema();
+        this.f760 = readerSchema.getField("F76").schema();
+        this.f770 = readerSchema.getField("F77").schema();
+        this.f780 = readerSchema.getField("F78").schema();
+        this.f790 = readerSchema.getField("F79").schema();
+        this.f800 = readerSchema.getField("F80").schema();
+        this.f810 = readerSchema.getField("F81").schema();
+        this.f820 = readerSchema.getField("F82").schema();
+        this.f830 = readerSchema.getField("F83").schema();
+        this.f840 = readerSchema.getField("F84").schema();
+        this.f850 = readerSchema.getField("F85").schema();
+        this.f860 = readerSchema.getField("F86").schema();
+        this.f870 = readerSchema.getField("F87").schema();
+        this.f880 = readerSchema.getField("F88").schema();
+        this.f890 = readerSchema.getField("F89").schema();
+        this.f900 = readerSchema.getField("F90").schema();
+        this.f910 = readerSchema.getField("F91").schema();
+        this.f920 = readerSchema.getField("F92").schema();
+        this.f930 = readerSchema.getField("F93").schema();
+        this.f940 = readerSchema.getField("F94").schema();
+        this.f950 = readerSchema.getField("F95").schema();
+        this.f960 = readerSchema.getField("F96").schema();
+        this.f970 = readerSchema.getField("F97").schema();
+        this.f980 = readerSchema.getField("F98").schema();
+        this.f990 = readerSchema.getField("F99").schema();
+        this.f1000 = readerSchema.getField("F100").schema();
+        this.f1010 = readerSchema.getField("F101").schema();
+        this.f1020 = readerSchema.getField("F102").schema();
+        this.f1030 = readerSchema.getField("F103").schema();
+        this.f1040 = readerSchema.getField("F104").schema();
+        this.f1050 = readerSchema.getField("F105").schema();
+        this.f1060 = readerSchema.getField("F106").schema();
+        this.f1070 = readerSchema.getField("F107").schema();
+        this.f1080 = readerSchema.getField("F108").schema();
+        this.f1090 = readerSchema.getField("F109").schema();
+        this.f1100 = readerSchema.getField("F110").schema();
+        this.f1110 = readerSchema.getField("F111").schema();
+        this.f1120 = readerSchema.getField("F112").schema();
+        this.f1130 = readerSchema.getField("F113").schema();
+        this.f1140 = readerSchema.getField("F114").schema();
+        this.f1150 = readerSchema.getField("F115").schema();
+        this.f1160 = readerSchema.getField("F116").schema();
+        this.f1170 = readerSchema.getField("F117").schema();
+        this.f1180 = readerSchema.getField("F118").schema();
+        this.f1190 = readerSchema.getField("F119").schema();
+        this.f1200 = readerSchema.getField("F120").schema();
+        this.f1210 = readerSchema.getField("F121").schema();
+        this.f1220 = readerSchema.getField("F122").schema();
+        this.f1230 = readerSchema.getField("F123").schema();
+        this.f1240 = readerSchema.getField("F124").schema();
+        this.f1250 = readerSchema.getField("F125").schema();
+        this.f1260 = readerSchema.getField("F126").schema();
+        this.f1270 = readerSchema.getField("F127").schema();
+        this.f1280 = readerSchema.getField("F128").schema();
+        this.f1290 = readerSchema.getField("F129").schema();
+        this.f1300 = readerSchema.getField("F130").schema();
+        this.f1310 = readerSchema.getField("F131").schema();
+        this.f1320 = readerSchema.getField("F132").schema();
+        this.f1330 = readerSchema.getField("F133").schema();
+        this.f1340 = readerSchema.getField("F134").schema();
+        this.f1350 = readerSchema.getField("F135").schema();
+        this.f1360 = readerSchema.getField("F136").schema();
+        this.f1370 = readerSchema.getField("F137").schema();
+        this.f1380 = readerSchema.getField("F138").schema();
+        this.f1390 = readerSchema.getField("F139").schema();
+        this.f1400 = readerSchema.getField("F140").schema();
+        this.f1410 = readerSchema.getField("F141").schema();
+        this.f1420 = readerSchema.getField("F142").schema();
+        this.f1430 = readerSchema.getField("F143").schema();
+        this.f1440 = readerSchema.getField("F144").schema();
+        this.f1450 = readerSchema.getField("F145").schema();
+        this.f1460 = readerSchema.getField("F146").schema();
+        this.f1470 = readerSchema.getField("F147").schema();
+        this.f1480 = readerSchema.getField("F148").schema();
+        this.f1490 = readerSchema.getField("F149").schema();
+        this.f1500 = readerSchema.getField("F150").schema();
+        this.f1510 = readerSchema.getField("F151").schema();
+        this.f1520 = readerSchema.getField("F152").schema();
+        this.f1530 = readerSchema.getField("F153").schema();
+        this.f1540 = readerSchema.getField("F154").schema();
+        this.f1550 = readerSchema.getField("F155").schema();
+        this.f1560 = readerSchema.getField("F156").schema();
+        this.f1570 = readerSchema.getField("F157").schema();
+        this.f1580 = readerSchema.getField("F158").schema();
+        this.f1590 = readerSchema.getField("F159").schema();
+        this.f1600 = readerSchema.getField("F160").schema();
+        this.f1610 = readerSchema.getField("F161").schema();
+        this.f1620 = readerSchema.getField("F162").schema();
+        this.f1630 = readerSchema.getField("F163").schema();
+        this.f1640 = readerSchema.getField("F164").schema();
+        this.f1650 = readerSchema.getField("F165").schema();
+        this.f1660 = readerSchema.getField("F166").schema();
+        this.f1670 = readerSchema.getField("F167").schema();
+        this.f1680 = readerSchema.getField("F168").schema();
+        this.f1690 = readerSchema.getField("F169").schema();
+        this.f1700 = readerSchema.getField("F170").schema();
+        this.f1710 = readerSchema.getField("F171").schema();
+        this.f1720 = readerSchema.getField("F172").schema();
+        this.f1730 = readerSchema.getField("F173").schema();
+        this.f1740 = readerSchema.getField("F174").schema();
+        this.f1750 = readerSchema.getField("F175").schema();
+        this.f1760 = readerSchema.getField("F176").schema();
+        this.f1770 = readerSchema.getField("F177").schema();
+        this.f1780 = readerSchema.getField("F178").schema();
+        this.f1790 = readerSchema.getField("F179").schema();
+        this.f1800 = readerSchema.getField("F180").schema();
+        this.f1810 = readerSchema.getField("F181").schema();
+        this.f1820 = readerSchema.getField("F182").schema();
+        this.f1830 = readerSchema.getField("F183").schema();
+        this.f1840 = readerSchema.getField("F184").schema();
+        this.f1850 = readerSchema.getField("F185").schema();
+        this.f1860 = readerSchema.getField("F186").schema();
+        this.f1870 = readerSchema.getField("F187").schema();
+        this.f1880 = readerSchema.getField("F188").schema();
+        this.f1890 = readerSchema.getField("F189").schema();
+        this.f1900 = readerSchema.getField("F190").schema();
+        this.f1910 = readerSchema.getField("F191").schema();
+        this.f1920 = readerSchema.getField("F192").schema();
+        this.f1930 = readerSchema.getField("F193").schema();
+        this.f1940 = readerSchema.getField("F194").schema();
+        this.f1950 = readerSchema.getField("F195").schema();
+        this.f1960 = readerSchema.getField("F196").schema();
+        this.f1970 = readerSchema.getField("F197").schema();
+        this.f1980 = readerSchema.getField("F198").schema();
+        this.f1990 = readerSchema.getField("F199").schema();
+        this.f2000 = readerSchema.getField("F200").schema();
+        this.f2010 = readerSchema.getField("F201").schema();
+        this.f2020 = readerSchema.getField("F202").schema();
+        this.f2030 = readerSchema.getField("F203").schema();
+        this.f2040 = readerSchema.getField("F204").schema();
+        this.f2050 = readerSchema.getField("F205").schema();
+        this.f2060 = readerSchema.getField("F206").schema();
+        this.f2070 = readerSchema.getField("F207").schema();
+        this.f2080 = readerSchema.getField("F208").schema();
+        this.f2090 = readerSchema.getField("F209").schema();
+        this.f2100 = readerSchema.getField("F210").schema();
+        this.f2110 = readerSchema.getField("F211").schema();
+        this.f2120 = readerSchema.getField("F212").schema();
+        this.f2130 = readerSchema.getField("F213").schema();
+        this.f2140 = readerSchema.getField("F214").schema();
+        this.f2150 = readerSchema.getField("F215").schema();
+        this.f2160 = readerSchema.getField("F216").schema();
+        this.f2170 = readerSchema.getField("F217").schema();
+        this.f2180 = readerSchema.getField("F218").schema();
+        this.f2190 = readerSchema.getField("F219").schema();
+        this.f2200 = readerSchema.getField("F220").schema();
+        this.f2210 = readerSchema.getField("F221").schema();
+        this.f2220 = readerSchema.getField("F222").schema();
+        this.f2230 = readerSchema.getField("F223").schema();
+        this.f2240 = readerSchema.getField("F224").schema();
+        this.f2250 = readerSchema.getField("F225").schema();
+        this.f2260 = readerSchema.getField("F226").schema();
+        this.f2270 = readerSchema.getField("F227").schema();
+        this.f2280 = readerSchema.getField("F228").schema();
+        this.f2290 = readerSchema.getField("F229").schema();
+        this.f2300 = readerSchema.getField("F230").schema();
+        this.f2310 = readerSchema.getField("F231").schema();
+        this.f2320 = readerSchema.getField("F232").schema();
+        this.f2330 = readerSchema.getField("F233").schema();
+        this.f2340 = readerSchema.getField("F234").schema();
+        this.f2350 = readerSchema.getField("F235").schema();
+        this.f2360 = readerSchema.getField("F236").schema();
+        this.f2370 = readerSchema.getField("F237").schema();
+        this.f2380 = readerSchema.getField("F238").schema();
+        this.f2390 = readerSchema.getField("F239").schema();
+        this.f2400 = readerSchema.getField("F240").schema();
+        this.f2410 = readerSchema.getField("F241").schema();
+        this.f2420 = readerSchema.getField("F242").schema();
+        this.f2430 = readerSchema.getField("F243").schema();
+        this.f2440 = readerSchema.getField("F244").schema();
+        this.f2450 = readerSchema.getField("F245").schema();
+        this.f2460 = readerSchema.getField("F246").schema();
+        this.f2470 = readerSchema.getField("F247").schema();
+        this.f2480 = readerSchema.getField("F248").schema();
+        this.f2490 = readerSchema.getField("F249").schema();
+        this.f2500 = readerSchema.getField("F250").schema();
+        this.f2510 = readerSchema.getField("F251").schema();
+        this.f2520 = readerSchema.getField("F252").schema();
+        this.f2530 = readerSchema.getField("F253").schema();
+        this.f2540 = readerSchema.getField("F254").schema();
+        this.f2550 = readerSchema.getField("F255").schema();
+        this.f2560 = readerSchema.getField("F256").schema();
+        this.f2570 = readerSchema.getField("F257").schema();
+        this.f2580 = readerSchema.getField("F258").schema();
+        this.f2590 = readerSchema.getField("F259").schema();
+        this.f2600 = readerSchema.getField("F260").schema();
+        this.f2610 = readerSchema.getField("F261").schema();
+        this.f2620 = readerSchema.getField("F262").schema();
+        this.f2630 = readerSchema.getField("F263").schema();
+        this.f2640 = readerSchema.getField("F264").schema();
+        this.f2650 = readerSchema.getField("F265").schema();
+        this.f2660 = readerSchema.getField("F266").schema();
+        this.f2670 = readerSchema.getField("F267").schema();
+        this.f2680 = readerSchema.getField("F268").schema();
+        this.f2690 = readerSchema.getField("F269").schema();
+        this.f2700 = readerSchema.getField("F270").schema();
+        this.f2710 = readerSchema.getField("F271").schema();
+        this.f2720 = readerSchema.getField("F272").schema();
+        this.f2730 = readerSchema.getField("F273").schema();
+        this.f2740 = readerSchema.getField("F274").schema();
+        this.f2750 = readerSchema.getField("F275").schema();
+        this.f2760 = readerSchema.getField("F276").schema();
+        this.f2770 = readerSchema.getField("F277").schema();
+        this.f2780 = readerSchema.getField("F278").schema();
+        this.f2790 = readerSchema.getField("F279").schema();
+        this.f2800 = readerSchema.getField("F280").schema();
+        this.f2810 = readerSchema.getField("F281").schema();
+        this.f2820 = readerSchema.getField("F282").schema();
+        this.f2830 = readerSchema.getField("F283").schema();
+        this.f2840 = readerSchema.getField("F284").schema();
+        this.f2850 = readerSchema.getField("F285").schema();
+        this.f2860 = readerSchema.getField("F286").schema();
+        this.f2870 = readerSchema.getField("F287").schema();
+        this.f2880 = readerSchema.getField("F288").schema();
+        this.f2890 = readerSchema.getField("F289").schema();
+        this.f2900 = readerSchema.getField("F290").schema();
+        this.f2910 = readerSchema.getField("F291").schema();
+        this.f2920 = readerSchema.getField("F292").schema();
+        this.f2930 = readerSchema.getField("F293").schema();
+        this.f2940 = readerSchema.getField("F294").schema();
+        this.f2950 = readerSchema.getField("F295").schema();
+        this.f2960 = readerSchema.getField("F296").schema();
+        this.f2970 = readerSchema.getField("F297").schema();
+        this.f2980 = readerSchema.getField("F298").schema();
+        this.f2990 = readerSchema.getField("F299").schema();
+        this.f3000 = readerSchema.getField("F300").schema();
+        this.f3010 = readerSchema.getField("F301").schema();
+        this.f3020 = readerSchema.getField("F302").schema();
+        this.f3030 = readerSchema.getField("F303").schema();
+        this.f3040 = readerSchema.getField("F304").schema();
+        this.f3050 = readerSchema.getField("F305").schema();
+        this.f3060 = readerSchema.getField("F306").schema();
+        this.f3070 = readerSchema.getField("F307").schema();
+        this.f3080 = readerSchema.getField("F308").schema();
+        this.f3090 = readerSchema.getField("F309").schema();
+        this.f3100 = readerSchema.getField("F310").schema();
+        this.f3110 = readerSchema.getField("F311").schema();
+        this.f3120 = readerSchema.getField("F312").schema();
+        this.f3130 = readerSchema.getField("F313").schema();
+        this.f3140 = readerSchema.getField("F314").schema();
+        this.f3150 = readerSchema.getField("F315").schema();
+        this.f3160 = readerSchema.getField("F316").schema();
+        this.f3170 = readerSchema.getField("F317").schema();
+        this.f3180 = readerSchema.getField("F318").schema();
+        this.f3190 = readerSchema.getField("F319").schema();
+        this.f3200 = readerSchema.getField("F320").schema();
+        this.f3210 = readerSchema.getField("F321").schema();
+        this.f3220 = readerSchema.getField("F322").schema();
+        this.f3230 = readerSchema.getField("F323").schema();
+        this.f3240 = readerSchema.getField("F324").schema();
+        this.f3250 = readerSchema.getField("F325").schema();
+        this.f3260 = readerSchema.getField("F326").schema();
+        this.f3270 = readerSchema.getField("F327").schema();
+        this.f3280 = readerSchema.getField("F328").schema();
+        this.f3290 = readerSchema.getField("F329").schema();
+        this.f3300 = readerSchema.getField("F330").schema();
+        this.f3310 = readerSchema.getField("F331").schema();
+        this.f3320 = readerSchema.getField("F332").schema();
+        this.f3330 = readerSchema.getField("F333").schema();
+        this.f3340 = readerSchema.getField("F334").schema();
+        this.f3350 = readerSchema.getField("F335").schema();
+        this.f3360 = readerSchema.getField("F336").schema();
+        this.f3370 = readerSchema.getField("F337").schema();
+        this.f3380 = readerSchema.getField("F338").schema();
+        this.f3390 = readerSchema.getField("F339").schema();
+        this.f3400 = readerSchema.getField("F340").schema();
+        this.f3410 = readerSchema.getField("F341").schema();
+        this.f3420 = readerSchema.getField("F342").schema();
+        this.f3430 = readerSchema.getField("F343").schema();
+        this.f3440 = readerSchema.getField("F344").schema();
+        this.f3450 = readerSchema.getField("F345").schema();
+        this.f3460 = readerSchema.getField("F346").schema();
+        this.f3470 = readerSchema.getField("F347").schema();
+        this.f3480 = readerSchema.getField("F348").schema();
+        this.f3490 = readerSchema.getField("F349").schema();
+        this.f3500 = readerSchema.getField("F350").schema();
+        this.f3510 = readerSchema.getField("F351").schema();
+        this.f3520 = readerSchema.getField("F352").schema();
+        this.f3530 = readerSchema.getField("F353").schema();
+        this.f3540 = readerSchema.getField("F354").schema();
+        this.f3550 = readerSchema.getField("F355").schema();
+        this.f3560 = readerSchema.getField("F356").schema();
+        this.f3570 = readerSchema.getField("F357").schema();
+        this.f3580 = readerSchema.getField("F358").schema();
+        this.f3590 = readerSchema.getField("F359").schema();
+        this.f3600 = readerSchema.getField("F360").schema();
+        this.f3610 = readerSchema.getField("F361").schema();
+        this.f3620 = readerSchema.getField("F362").schema();
+        this.f3630 = readerSchema.getField("F363").schema();
+        this.f3640 = readerSchema.getField("F364").schema();
+        this.f3650 = readerSchema.getField("F365").schema();
+        this.f3660 = readerSchema.getField("F366").schema();
+        this.f3670 = readerSchema.getField("F367").schema();
+        this.f3680 = readerSchema.getField("F368").schema();
+        this.f3690 = readerSchema.getField("F369").schema();
+        this.f3700 = readerSchema.getField("F370").schema();
+        this.f3710 = readerSchema.getField("F371").schema();
+        this.f3720 = readerSchema.getField("F372").schema();
+        this.f3730 = readerSchema.getField("F373").schema();
+        this.f3740 = readerSchema.getField("F374").schema();
+        this.f3750 = readerSchema.getField("F375").schema();
+        this.f3760 = readerSchema.getField("F376").schema();
+        this.f3770 = readerSchema.getField("F377").schema();
+        this.f3780 = readerSchema.getField("F378").schema();
+        this.f3790 = readerSchema.getField("F379").schema();
+        this.f3800 = readerSchema.getField("F380").schema();
+        this.f3810 = readerSchema.getField("F381").schema();
+        this.f3820 = readerSchema.getField("F382").schema();
+        this.f3830 = readerSchema.getField("F383").schema();
+        this.f3840 = readerSchema.getField("F384").schema();
+        this.f3850 = readerSchema.getField("F385").schema();
+        this.f3860 = readerSchema.getField("F386").schema();
+        this.f3870 = readerSchema.getField("F387").schema();
+        this.f3880 = readerSchema.getField("F388").schema();
+        this.f3890 = readerSchema.getField("F389").schema();
+        this.f3900 = readerSchema.getField("F390").schema();
+        this.f3910 = readerSchema.getField("F391").schema();
+        this.f3920 = readerSchema.getField("F392").schema();
+        this.f3930 = readerSchema.getField("F393").schema();
+        this.f3940 = readerSchema.getField("F394").schema();
+        this.f3950 = readerSchema.getField("F395").schema();
+        this.f3960 = readerSchema.getField("F396").schema();
+        this.f3970 = readerSchema.getField("F397").schema();
+        this.f3980 = readerSchema.getField("F398").schema();
+        this.f3990 = readerSchema.getField("F399").schema();
+        this.f4000 = readerSchema.getField("F400").schema();
+        this.f4010 = readerSchema.getField("F401").schema();
+        this.f4020 = readerSchema.getField("F402").schema();
+        this.f4030 = readerSchema.getField("F403").schema();
+        this.f4040 = readerSchema.getField("F404").schema();
+        this.f4050 = readerSchema.getField("F405").schema();
+        this.f4060 = readerSchema.getField("F406").schema();
+        this.f4070 = readerSchema.getField("F407").schema();
+        this.f4080 = readerSchema.getField("F408").schema();
+        this.f4090 = readerSchema.getField("F409").schema();
+        this.f4100 = readerSchema.getField("F410").schema();
+        this.f4110 = readerSchema.getField("F411").schema();
+        this.f4120 = readerSchema.getField("F412").schema();
+        this.f4130 = readerSchema.getField("F413").schema();
+        this.f4140 = readerSchema.getField("F414").schema();
+        this.f4150 = readerSchema.getField("F415").schema();
+        this.f4160 = readerSchema.getField("F416").schema();
+        this.f4170 = readerSchema.getField("F417").schema();
+        this.f4180 = readerSchema.getField("F418").schema();
+        this.f4190 = readerSchema.getField("F419").schema();
+        this.f4200 = readerSchema.getField("F420").schema();
+        this.f4210 = readerSchema.getField("F421").schema();
+        this.f4220 = readerSchema.getField("F422").schema();
+        this.f4230 = readerSchema.getField("F423").schema();
+        this.f4240 = readerSchema.getField("F424").schema();
+        this.f4250 = readerSchema.getField("F425").schema();
+        this.f4260 = readerSchema.getField("F426").schema();
+        this.f4270 = readerSchema.getField("F427").schema();
+        this.f4280 = readerSchema.getField("F428").schema();
+        this.f4290 = readerSchema.getField("F429").schema();
+        this.f4300 = readerSchema.getField("F430").schema();
+        this.f4310 = readerSchema.getField("F431").schema();
+        this.f4320 = readerSchema.getField("F432").schema();
+        this.f4330 = readerSchema.getField("F433").schema();
+        this.f4340 = readerSchema.getField("F434").schema();
+        this.f4350 = readerSchema.getField("F435").schema();
+        this.f4360 = readerSchema.getField("F436").schema();
+        this.f4370 = readerSchema.getField("F437").schema();
+        this.f4380 = readerSchema.getField("F438").schema();
+        this.f4390 = readerSchema.getField("F439").schema();
+        this.f4400 = readerSchema.getField("F440").schema();
+        this.f4410 = readerSchema.getField("F441").schema();
+        this.f4420 = readerSchema.getField("F442").schema();
+        this.f4430 = readerSchema.getField("F443").schema();
+        this.f4440 = readerSchema.getField("F444").schema();
+        this.f4450 = readerSchema.getField("F445").schema();
+        this.f4460 = readerSchema.getField("F446").schema();
+        this.f4470 = readerSchema.getField("F447").schema();
+        this.f4480 = readerSchema.getField("F448").schema();
+        this.f4490 = readerSchema.getField("F449").schema();
+        this.f4500 = readerSchema.getField("F450").schema();
+        this.f4510 = readerSchema.getField("F451").schema();
+        this.f4520 = readerSchema.getField("F452").schema();
+        this.f4530 = readerSchema.getField("F453").schema();
+        this.f4540 = readerSchema.getField("F454").schema();
+        this.f4550 = readerSchema.getField("F455").schema();
+        this.f4560 = readerSchema.getField("F456").schema();
+        this.f4570 = readerSchema.getField("F457").schema();
+        this.f4580 = readerSchema.getField("F458").schema();
+        this.f4590 = readerSchema.getField("F459").schema();
+        this.f4600 = readerSchema.getField("F460").schema();
+        this.f4610 = readerSchema.getField("F461").schema();
+        this.f4620 = readerSchema.getField("F462").schema();
+        this.f4630 = readerSchema.getField("F463").schema();
+        this.f4640 = readerSchema.getField("F464").schema();
+        this.f4650 = readerSchema.getField("F465").schema();
+        this.f4660 = readerSchema.getField("F466").schema();
+        this.f4670 = readerSchema.getField("F467").schema();
+        this.f4680 = readerSchema.getField("F468").schema();
+        this.f4690 = readerSchema.getField("F469").schema();
+        this.f4700 = readerSchema.getField("F470").schema();
+        this.f4710 = readerSchema.getField("F471").schema();
+        this.f4720 = readerSchema.getField("F472").schema();
+        this.f4730 = readerSchema.getField("F473").schema();
+        this.f4740 = readerSchema.getField("F474").schema();
+        this.f4750 = readerSchema.getField("F475").schema();
+        this.f4760 = readerSchema.getField("F476").schema();
+        this.f4770 = readerSchema.getField("F477").schema();
+        this.f4780 = readerSchema.getField("F478").schema();
+        this.f4790 = readerSchema.getField("F479").schema();
+        this.f4800 = readerSchema.getField("F480").schema();
+        this.f4810 = readerSchema.getField("F481").schema();
+        this.f4820 = readerSchema.getField("F482").schema();
+        this.f4830 = readerSchema.getField("F483").schema();
+        this.f4840 = readerSchema.getField("F484").schema();
+        this.f4850 = readerSchema.getField("F485").schema();
+        this.f4860 = readerSchema.getField("F486").schema();
+        this.f4870 = readerSchema.getField("F487").schema();
+        this.f4880 = readerSchema.getField("F488").schema();
+        this.f4890 = readerSchema.getField("F489").schema();
+        this.f4900 = readerSchema.getField("F490").schema();
+        this.f4910 = readerSchema.getField("F491").schema();
+        this.f4920 = readerSchema.getField("F492").schema();
+        this.f4930 = readerSchema.getField("F493").schema();
+        this.f4940 = readerSchema.getField("F494").schema();
+        this.f4950 = readerSchema.getField("F495").schema();
+        this.f4960 = readerSchema.getField("F496").schema();
+        this.f4970 = readerSchema.getField("F497").schema();
+        this.f4980 = readerSchema.getField("F498").schema();
+        this.f4990 = readerSchema.getField("F499").schema();
+        this.f5000 = readerSchema.getField("F500").schema();
+        this.f5010 = readerSchema.getField("F501").schema();
+        this.f5020 = readerSchema.getField("F502").schema();
+        this.f5030 = readerSchema.getField("F503").schema();
+        this.f5040 = readerSchema.getField("F504").schema();
+        this.f5050 = readerSchema.getField("F505").schema();
+        this.f5060 = readerSchema.getField("F506").schema();
+        this.f5070 = readerSchema.getField("F507").schema();
+        this.f5080 = readerSchema.getField("F508").schema();
+        this.f5090 = readerSchema.getField("F509").schema();
+        this.f5100 = readerSchema.getField("F510").schema();
+        this.f5110 = readerSchema.getField("F511").schema();
+        this.f5120 = readerSchema.getField("F512").schema();
+        this.f5130 = readerSchema.getField("F513").schema();
+        this.f5140 = readerSchema.getField("F514").schema();
+        this.f5150 = readerSchema.getField("F515").schema();
+        this.f5160 = readerSchema.getField("F516").schema();
+        this.f5170 = readerSchema.getField("F517").schema();
+        this.f5180 = readerSchema.getField("F518").schema();
+        this.f5190 = readerSchema.getField("F519").schema();
+        this.f5200 = readerSchema.getField("F520").schema();
+        this.f5210 = readerSchema.getField("F521").schema();
+        this.f5220 = readerSchema.getField("F522").schema();
+        this.f5230 = readerSchema.getField("F523").schema();
+        this.f5240 = readerSchema.getField("F524").schema();
+        this.f5250 = readerSchema.getField("F525").schema();
+        this.f5260 = readerSchema.getField("F526").schema();
+        this.f5270 = readerSchema.getField("F527").schema();
+        this.f5280 = readerSchema.getField("F528").schema();
+        this.f5290 = readerSchema.getField("F529").schema();
+        this.f5300 = readerSchema.getField("F530").schema();
+        this.f5310 = readerSchema.getField("F531").schema();
+        this.f5320 = readerSchema.getField("F532").schema();
+        this.f5330 = readerSchema.getField("F533").schema();
+        this.f5340 = readerSchema.getField("F534").schema();
+        this.f5350 = readerSchema.getField("F535").schema();
+        this.f5360 = readerSchema.getField("F536").schema();
+        this.f5370 = readerSchema.getField("F537").schema();
+        this.f5380 = readerSchema.getField("F538").schema();
+        this.f5390 = readerSchema.getField("F539").schema();
+        this.f5400 = readerSchema.getField("F540").schema();
+        this.f5410 = readerSchema.getField("F541").schema();
+        this.f5420 = readerSchema.getField("F542").schema();
+        this.f5430 = readerSchema.getField("F543").schema();
+        this.f5440 = readerSchema.getField("F544").schema();
+        this.f5450 = readerSchema.getField("F545").schema();
+        this.f5460 = readerSchema.getField("F546").schema();
+        this.f5470 = readerSchema.getField("F547").schema();
+        this.f5480 = readerSchema.getField("F548").schema();
+        this.f5490 = readerSchema.getField("F549").schema();
+        this.f5500 = readerSchema.getField("F550").schema();
+        this.f5510 = readerSchema.getField("F551").schema();
+        this.f5520 = readerSchema.getField("F552").schema();
+        this.f5530 = readerSchema.getField("F553").schema();
+        this.f5540 = readerSchema.getField("F554").schema();
+        this.f5550 = readerSchema.getField("F555").schema();
+        this.f5560 = readerSchema.getField("F556").schema();
+        this.f5570 = readerSchema.getField("F557").schema();
+        this.f5580 = readerSchema.getField("F558").schema();
+        this.f5590 = readerSchema.getField("F559").schema();
+        this.f5600 = readerSchema.getField("F560").schema();
+        this.f5610 = readerSchema.getField("F561").schema();
+        this.f5620 = readerSchema.getField("F562").schema();
+        this.f5630 = readerSchema.getField("F563").schema();
+        this.f5640 = readerSchema.getField("F564").schema();
+        this.f5650 = readerSchema.getField("F565").schema();
+        this.f5660 = readerSchema.getField("F566").schema();
+        this.f5670 = readerSchema.getField("F567").schema();
+        this.f5680 = readerSchema.getField("F568").schema();
+        this.f5690 = readerSchema.getField("F569").schema();
+        this.f5700 = readerSchema.getField("F570").schema();
+        this.f5710 = readerSchema.getField("F571").schema();
+        this.f5720 = readerSchema.getField("F572").schema();
+        this.f5730 = readerSchema.getField("F573").schema();
+        this.f5740 = readerSchema.getField("F574").schema();
+        this.f5750 = readerSchema.getField("F575").schema();
+        this.f5760 = readerSchema.getField("F576").schema();
+        this.f5770 = readerSchema.getField("F577").schema();
+        this.f5780 = readerSchema.getField("F578").schema();
+        this.f5790 = readerSchema.getField("F579").schema();
+        this.f5800 = readerSchema.getField("F580").schema();
+        this.f5810 = readerSchema.getField("F581").schema();
+        this.f5820 = readerSchema.getField("F582").schema();
+        this.f5830 = readerSchema.getField("F583").schema();
+        this.f5840 = readerSchema.getField("F584").schema();
+        this.f5850 = readerSchema.getField("F585").schema();
+        this.f5860 = readerSchema.getField("F586").schema();
+        this.f5870 = readerSchema.getField("F587").schema();
+        this.f5880 = readerSchema.getField("F588").schema();
+        this.f5890 = readerSchema.getField("F589").schema();
+        this.f5900 = readerSchema.getField("F590").schema();
+        this.f5910 = readerSchema.getField("F591").schema();
+        this.f5920 = readerSchema.getField("F592").schema();
+        this.f5930 = readerSchema.getField("F593").schema();
+        this.f5940 = readerSchema.getField("F594").schema();
+        this.f5950 = readerSchema.getField("F595").schema();
+        this.f5960 = readerSchema.getField("F596").schema();
+        this.f5970 = readerSchema.getField("F597").schema();
+        this.f5980 = readerSchema.getField("F598").schema();
+        this.f5990 = readerSchema.getField("F599").schema();
+        this.f6000 = readerSchema.getField("F600").schema();
+        this.f6010 = readerSchema.getField("F601").schema();
+        this.f6020 = readerSchema.getField("F602").schema();
+        this.f6030 = readerSchema.getField("F603").schema();
+        this.f6040 = readerSchema.getField("F604").schema();
+        this.f6050 = readerSchema.getField("F605").schema();
+        this.f6060 = readerSchema.getField("F606").schema();
+        this.f6070 = readerSchema.getField("F607").schema();
+        this.f6080 = readerSchema.getField("F608").schema();
+        this.f6090 = readerSchema.getField("F609").schema();
+        this.f6100 = readerSchema.getField("F610").schema();
+        this.f6110 = readerSchema.getField("F611").schema();
+        this.f6120 = readerSchema.getField("F612").schema();
+        this.f6130 = readerSchema.getField("F613").schema();
+        this.f6140 = readerSchema.getField("F614").schema();
+        this.f6150 = readerSchema.getField("F615").schema();
+        this.f6160 = readerSchema.getField("F616").schema();
+        this.f6170 = readerSchema.getField("F617").schema();
+        this.f6180 = readerSchema.getField("F618").schema();
+        this.f6190 = readerSchema.getField("F619").schema();
+        this.f6200 = readerSchema.getField("F620").schema();
+        this.f6210 = readerSchema.getField("F621").schema();
+        this.f6220 = readerSchema.getField("F622").schema();
+        this.f6230 = readerSchema.getField("F623").schema();
+        this.f6240 = readerSchema.getField("F624").schema();
+        this.f6250 = readerSchema.getField("F625").schema();
+        this.f6260 = readerSchema.getField("F626").schema();
+        this.f6270 = readerSchema.getField("F627").schema();
+        this.f6280 = readerSchema.getField("F628").schema();
+        this.f6290 = readerSchema.getField("F629").schema();
+        this.f6300 = readerSchema.getField("F630").schema();
+        this.f6310 = readerSchema.getField("F631").schema();
+        this.f6320 = readerSchema.getField("F632").schema();
+        this.f6330 = readerSchema.getField("F633").schema();
+        this.f6340 = readerSchema.getField("F634").schema();
+        this.f6350 = readerSchema.getField("F635").schema();
+        this.f6360 = readerSchema.getField("F636").schema();
+        this.f6370 = readerSchema.getField("F637").schema();
+        this.f6380 = readerSchema.getField("F638").schema();
+        this.f6390 = readerSchema.getField("F639").schema();
+        this.f6400 = readerSchema.getField("F640").schema();
+        this.f6410 = readerSchema.getField("F641").schema();
+        this.f6420 = readerSchema.getField("F642").schema();
+        this.f6430 = readerSchema.getField("F643").schema();
+        this.f6440 = readerSchema.getField("F644").schema();
+        this.f6450 = readerSchema.getField("F645").schema();
+        this.f6460 = readerSchema.getField("F646").schema();
+        this.f6470 = readerSchema.getField("F647").schema();
+        this.f6480 = readerSchema.getField("F648").schema();
+        this.f6490 = readerSchema.getField("F649").schema();
+        this.f6500 = readerSchema.getField("F650").schema();
+        this.f6510 = readerSchema.getField("F651").schema();
+        this.f6520 = readerSchema.getField("F652").schema();
+        this.f6530 = readerSchema.getField("F653").schema();
+        this.f6540 = readerSchema.getField("F654").schema();
+        this.f6550 = readerSchema.getField("F655").schema();
+        this.f6560 = readerSchema.getField("F656").schema();
+        this.f6570 = readerSchema.getField("F657").schema();
+        this.f6580 = readerSchema.getField("F658").schema();
+        this.f6590 = readerSchema.getField("F659").schema();
+        this.f6600 = readerSchema.getField("F660").schema();
+        this.f6610 = readerSchema.getField("F661").schema();
+        this.f6620 = readerSchema.getField("F662").schema();
+        this.f6630 = readerSchema.getField("F663").schema();
+        this.f6640 = readerSchema.getField("F664").schema();
+        this.f6650 = readerSchema.getField("F665").schema();
+        this.f6660 = readerSchema.getField("F666").schema();
+        this.f6670 = readerSchema.getField("F667").schema();
+        this.f6680 = readerSchema.getField("F668").schema();
+        this.f6690 = readerSchema.getField("F669").schema();
+        this.f6700 = readerSchema.getField("F670").schema();
+        this.f6710 = readerSchema.getField("F671").schema();
+        this.f6720 = readerSchema.getField("F672").schema();
+        this.f6730 = readerSchema.getField("F673").schema();
+        this.f6740 = readerSchema.getField("F674").schema();
+        this.f6750 = readerSchema.getField("F675").schema();
+        this.f6760 = readerSchema.getField("F676").schema();
+        this.f6770 = readerSchema.getField("F677").schema();
+        this.f6780 = readerSchema.getField("F678").schema();
+        this.f6790 = readerSchema.getField("F679").schema();
+        this.f6800 = readerSchema.getField("F680").schema();
+        this.f6810 = readerSchema.getField("F681").schema();
+        this.f6820 = readerSchema.getField("F682").schema();
+        this.f6830 = readerSchema.getField("F683").schema();
+        this.f6840 = readerSchema.getField("F684").schema();
+        this.f6850 = readerSchema.getField("F685").schema();
+        this.f6860 = readerSchema.getField("F686").schema();
+        this.f6870 = readerSchema.getField("F687").schema();
+        this.f6880 = readerSchema.getField("F688").schema();
+        this.f6890 = readerSchema.getField("F689").schema();
+        this.f6900 = readerSchema.getField("F690").schema();
+        this.f6910 = readerSchema.getField("F691").schema();
+        this.f6920 = readerSchema.getField("F692").schema();
+        this.f6930 = readerSchema.getField("F693").schema();
+        this.f6940 = readerSchema.getField("F694").schema();
+        this.f6950 = readerSchema.getField("F695").schema();
+        this.f6960 = readerSchema.getField("F696").schema();
+        this.f6970 = readerSchema.getField("F697").schema();
+        this.f6980 = readerSchema.getField("F698").schema();
+        this.f6990 = readerSchema.getField("F699").schema();
+        this.f7000 = readerSchema.getField("F700").schema();
+        this.f7010 = readerSchema.getField("F701").schema();
+        this.f7020 = readerSchema.getField("F702").schema();
+        this.f7030 = readerSchema.getField("F703").schema();
+        this.f7040 = readerSchema.getField("F704").schema();
+        this.f7050 = readerSchema.getField("F705").schema();
+        this.f7060 = readerSchema.getField("F706").schema();
+        this.f7070 = readerSchema.getField("F707").schema();
+        this.f7080 = readerSchema.getField("F708").schema();
+        this.f7090 = readerSchema.getField("F709").schema();
+        this.f7100 = readerSchema.getField("F710").schema();
+        this.f7110 = readerSchema.getField("F711").schema();
+        this.f7120 = readerSchema.getField("F712").schema();
+        this.f7130 = readerSchema.getField("F713").schema();
+        this.f7140 = readerSchema.getField("F714").schema();
+        this.f7150 = readerSchema.getField("F715").schema();
+        this.f7160 = readerSchema.getField("F716").schema();
+        this.f7170 = readerSchema.getField("F717").schema();
+        this.f7180 = readerSchema.getField("F718").schema();
+        this.f7190 = readerSchema.getField("F719").schema();
+        this.f7200 = readerSchema.getField("F720").schema();
+        this.f7210 = readerSchema.getField("F721").schema();
+        this.f7220 = readerSchema.getField("F722").schema();
+        this.f7230 = readerSchema.getField("F723").schema();
+        this.f7240 = readerSchema.getField("F724").schema();
+        this.f7250 = readerSchema.getField("F725").schema();
+        this.f7260 = readerSchema.getField("F726").schema();
+        this.f7270 = readerSchema.getField("F727").schema();
+        this.f7280 = readerSchema.getField("F728").schema();
+        this.f7290 = readerSchema.getField("F729").schema();
+        this.f7300 = readerSchema.getField("F730").schema();
+        this.f7310 = readerSchema.getField("F731").schema();
+        this.f7320 = readerSchema.getField("F732").schema();
+        this.f7330 = readerSchema.getField("F733").schema();
+        this.f7340 = readerSchema.getField("F734").schema();
+        this.f7350 = readerSchema.getField("F735").schema();
+        this.f7360 = readerSchema.getField("F736").schema();
+        this.f7370 = readerSchema.getField("F737").schema();
+        this.f7380 = readerSchema.getField("F738").schema();
+        this.f7390 = readerSchema.getField("F739").schema();
+        this.f7400 = readerSchema.getField("F740").schema();
+        this.f7410 = readerSchema.getField("F741").schema();
+        this.f7420 = readerSchema.getField("F742").schema();
+        this.f7430 = readerSchema.getField("F743").schema();
+        this.f7440 = readerSchema.getField("F744").schema();
+        this.f7450 = readerSchema.getField("F745").schema();
+        this.f7460 = readerSchema.getField("F746").schema();
+        this.f7470 = readerSchema.getField("F747").schema();
+        this.f7480 = readerSchema.getField("F748").schema();
+        this.f7490 = readerSchema.getField("F749").schema();
+        this.f7500 = readerSchema.getField("F750").schema();
+        this.f7510 = readerSchema.getField("F751").schema();
+        this.f7520 = readerSchema.getField("F752").schema();
+        this.f7530 = readerSchema.getField("F753").schema();
+        this.f7540 = readerSchema.getField("F754").schema();
+        this.f7550 = readerSchema.getField("F755").schema();
+        this.f7560 = readerSchema.getField("F756").schema();
+        this.f7570 = readerSchema.getField("F757").schema();
+        this.f7580 = readerSchema.getField("F758").schema();
+        this.f7590 = readerSchema.getField("F759").schema();
+        this.f7600 = readerSchema.getField("F760").schema();
+        this.f7610 = readerSchema.getField("F761").schema();
+        this.f7620 = readerSchema.getField("F762").schema();
+        this.f7630 = readerSchema.getField("F763").schema();
+        this.f7640 = readerSchema.getField("F764").schema();
+        this.f7650 = readerSchema.getField("F765").schema();
+        this.f7660 = readerSchema.getField("F766").schema();
+        this.f7670 = readerSchema.getField("F767").schema();
+        this.f7680 = readerSchema.getField("F768").schema();
+        this.f7690 = readerSchema.getField("F769").schema();
+        this.f7700 = readerSchema.getField("F770").schema();
+        this.f7710 = readerSchema.getField("F771").schema();
+        this.f7720 = readerSchema.getField("F772").schema();
+        this.f7730 = readerSchema.getField("F773").schema();
+        this.f7740 = readerSchema.getField("F774").schema();
+        this.f7750 = readerSchema.getField("F775").schema();
+        this.f7760 = readerSchema.getField("F776").schema();
+        this.f7770 = readerSchema.getField("F777").schema();
+        this.f7780 = readerSchema.getField("F778").schema();
+        this.f7790 = readerSchema.getField("F779").schema();
+        this.f7800 = readerSchema.getField("F780").schema();
+        this.f7810 = readerSchema.getField("F781").schema();
+        this.f7820 = readerSchema.getField("F782").schema();
+        this.f7830 = readerSchema.getField("F783").schema();
+        this.f7840 = readerSchema.getField("F784").schema();
+        this.f7850 = readerSchema.getField("F785").schema();
+        this.f7860 = readerSchema.getField("F786").schema();
+        this.f7870 = readerSchema.getField("F787").schema();
+        this.f7880 = readerSchema.getField("F788").schema();
+        this.f7890 = readerSchema.getField("F789").schema();
+        this.f7900 = readerSchema.getField("F790").schema();
+        this.f7910 = readerSchema.getField("F791").schema();
+        this.f7920 = readerSchema.getField("F792").schema();
+        this.f7930 = readerSchema.getField("F793").schema();
+        this.f7940 = readerSchema.getField("F794").schema();
+        this.f7950 = readerSchema.getField("F795").schema();
+        this.f7960 = readerSchema.getField("F796").schema();
+        this.f7970 = readerSchema.getField("F797").schema();
+        this.f7980 = readerSchema.getField("F798").schema();
+        this.f7990 = readerSchema.getField("F799").schema();
+        this.f8000 = readerSchema.getField("F800").schema();
+        this.f8010 = readerSchema.getField("F801").schema();
+        this.f8020 = readerSchema.getField("F802").schema();
+        this.f8030 = readerSchema.getField("F803").schema();
+        this.f8040 = readerSchema.getField("F804").schema();
+        this.f8050 = readerSchema.getField("F805").schema();
+        this.f8060 = readerSchema.getField("F806").schema();
+        this.f8070 = readerSchema.getField("F807").schema();
+        this.f8080 = readerSchema.getField("F808").schema();
+        this.f8090 = readerSchema.getField("F809").schema();
+        this.f8100 = readerSchema.getField("F810").schema();
+        this.f8110 = readerSchema.getField("F811").schema();
+        this.f8120 = readerSchema.getField("F812").schema();
+        this.f8130 = readerSchema.getField("F813").schema();
+        this.f8140 = readerSchema.getField("F814").schema();
+        this.f8150 = readerSchema.getField("F815").schema();
+        this.f8160 = readerSchema.getField("F816").schema();
+        this.f8170 = readerSchema.getField("F817").schema();
+        this.f8180 = readerSchema.getField("F818").schema();
+        this.f8190 = readerSchema.getField("F819").schema();
+        this.f8200 = readerSchema.getField("F820").schema();
+        this.f8210 = readerSchema.getField("F821").schema();
+        this.f8220 = readerSchema.getField("F822").schema();
+        this.f8230 = readerSchema.getField("F823").schema();
+        this.f8240 = readerSchema.getField("F824").schema();
+        this.f8250 = readerSchema.getField("F825").schema();
+        this.f8260 = readerSchema.getField("F826").schema();
+        this.f8270 = readerSchema.getField("F827").schema();
+        this.f8280 = readerSchema.getField("F828").schema();
+        this.f8290 = readerSchema.getField("F829").schema();
+        this.f8300 = readerSchema.getField("F830").schema();
+        this.f8310 = readerSchema.getField("F831").schema();
+        this.f8320 = readerSchema.getField("F832").schema();
+        this.f8330 = readerSchema.getField("F833").schema();
+        this.f8340 = readerSchema.getField("F834").schema();
+        this.f8350 = readerSchema.getField("F835").schema();
+        this.f8360 = readerSchema.getField("F836").schema();
+        this.f8370 = readerSchema.getField("F837").schema();
+        this.f8380 = readerSchema.getField("F838").schema();
+        this.f8390 = readerSchema.getField("F839").schema();
+        this.f8400 = readerSchema.getField("F840").schema();
+        this.f8410 = readerSchema.getField("F841").schema();
+        this.f8420 = readerSchema.getField("F842").schema();
+        this.f8430 = readerSchema.getField("F843").schema();
+        this.f8440 = readerSchema.getField("F844").schema();
+        this.f8450 = readerSchema.getField("F845").schema();
+        this.f8460 = readerSchema.getField("F846").schema();
+        this.f8470 = readerSchema.getField("F847").schema();
+        this.f8480 = readerSchema.getField("F848").schema();
+        this.f8490 = readerSchema.getField("F849").schema();
+        this.f8500 = readerSchema.getField("F850").schema();
+        this.f8510 = readerSchema.getField("F851").schema();
+        this.f8520 = readerSchema.getField("F852").schema();
+        this.f8530 = readerSchema.getField("F853").schema();
+        this.f8540 = readerSchema.getField("F854").schema();
+        this.f8550 = readerSchema.getField("F855").schema();
+        this.f8560 = readerSchema.getField("F856").schema();
+        this.f8570 = readerSchema.getField("F857").schema();
+        this.f8580 = readerSchema.getField("F858").schema();
+        this.f8590 = readerSchema.getField("F859").schema();
+        this.f8600 = readerSchema.getField("F860").schema();
+        this.f8610 = readerSchema.getField("F861").schema();
+        this.f8620 = readerSchema.getField("F862").schema();
+        this.f8630 = readerSchema.getField("F863").schema();
+        this.f8640 = readerSchema.getField("F864").schema();
+        this.f8650 = readerSchema.getField("F865").schema();
+        this.f8660 = readerSchema.getField("F866").schema();
+        this.f8670 = readerSchema.getField("F867").schema();
+        this.f8680 = readerSchema.getField("F868").schema();
+        this.f8690 = readerSchema.getField("F869").schema();
+        this.f8700 = readerSchema.getField("F870").schema();
+        this.f8710 = readerSchema.getField("F871").schema();
+        this.f8720 = readerSchema.getField("F872").schema();
+        this.f8730 = readerSchema.getField("F873").schema();
+        this.f8740 = readerSchema.getField("F874").schema();
+        this.f8750 = readerSchema.getField("F875").schema();
+        this.f8760 = readerSchema.getField("F876").schema();
+        this.f8770 = readerSchema.getField("F877").schema();
+        this.f8780 = readerSchema.getField("F878").schema();
+        this.f8790 = readerSchema.getField("F879").schema();
+        this.f8800 = readerSchema.getField("F880").schema();
+        this.f8810 = readerSchema.getField("F881").schema();
+        this.f8820 = readerSchema.getField("F882").schema();
+        this.f8830 = readerSchema.getField("F883").schema();
+        this.f8840 = readerSchema.getField("F884").schema();
+        this.f8850 = readerSchema.getField("F885").schema();
+        this.f8860 = readerSchema.getField("F886").schema();
+        this.f8870 = readerSchema.getField("F887").schema();
+        this.f8880 = readerSchema.getField("F888").schema();
+        this.f8890 = readerSchema.getField("F889").schema();
+        this.f8900 = readerSchema.getField("F890").schema();
+        this.f8910 = readerSchema.getField("F891").schema();
+        this.f8920 = readerSchema.getField("F892").schema();
+        this.f8930 = readerSchema.getField("F893").schema();
+        this.f8940 = readerSchema.getField("F894").schema();
+        this.f8950 = readerSchema.getField("F895").schema();
+        this.f8960 = readerSchema.getField("F896").schema();
+        this.f8970 = readerSchema.getField("F897").schema();
+        this.f8980 = readerSchema.getField("F898").schema();
+        this.f8990 = readerSchema.getField("F899").schema();
+        this.f9000 = readerSchema.getField("F900").schema();
+        this.f9010 = readerSchema.getField("F901").schema();
+        this.f9020 = readerSchema.getField("F902").schema();
+        this.f9030 = readerSchema.getField("F903").schema();
+        this.f9040 = readerSchema.getField("F904").schema();
+        this.f9050 = readerSchema.getField("F905").schema();
+        this.f9060 = readerSchema.getField("F906").schema();
+        this.f9070 = readerSchema.getField("F907").schema();
+        this.f9080 = readerSchema.getField("F908").schema();
+        this.f9090 = readerSchema.getField("F909").schema();
+        this.f9100 = readerSchema.getField("F910").schema();
+        this.f9110 = readerSchema.getField("F911").schema();
+        this.f9120 = readerSchema.getField("F912").schema();
+        this.f9130 = readerSchema.getField("F913").schema();
+        this.f9140 = readerSchema.getField("F914").schema();
+        this.f9150 = readerSchema.getField("F915").schema();
+        this.f9160 = readerSchema.getField("F916").schema();
+        this.f9170 = readerSchema.getField("F917").schema();
+        this.f9180 = readerSchema.getField("F918").schema();
+        this.f9190 = readerSchema.getField("F919").schema();
+        this.f9200 = readerSchema.getField("F920").schema();
+        this.f9210 = readerSchema.getField("F921").schema();
+        this.f9220 = readerSchema.getField("F922").schema();
+        this.f9230 = readerSchema.getField("F923").schema();
+        this.f9240 = readerSchema.getField("F924").schema();
+        this.f9250 = readerSchema.getField("F925").schema();
+        this.f9260 = readerSchema.getField("F926").schema();
+        this.f9270 = readerSchema.getField("F927").schema();
+        this.f9280 = readerSchema.getField("F928").schema();
+        this.f9290 = readerSchema.getField("F929").schema();
+        this.f9300 = readerSchema.getField("F930").schema();
+        this.f9310 = readerSchema.getField("F931").schema();
+        this.f9320 = readerSchema.getField("F932").schema();
+        this.f9330 = readerSchema.getField("F933").schema();
+        this.f9340 = readerSchema.getField("F934").schema();
+        this.f9350 = readerSchema.getField("F935").schema();
+        this.f9360 = readerSchema.getField("F936").schema();
+        this.f9370 = readerSchema.getField("F937").schema();
+        this.f9380 = readerSchema.getField("F938").schema();
+        this.f9390 = readerSchema.getField("F939").schema();
+        this.f9400 = readerSchema.getField("F940").schema();
+        this.f9410 = readerSchema.getField("F941").schema();
+        this.f9420 = readerSchema.getField("F942").schema();
+        this.f9430 = readerSchema.getField("F943").schema();
+        this.f9440 = readerSchema.getField("F944").schema();
+        this.f9450 = readerSchema.getField("F945").schema();
+        this.f9460 = readerSchema.getField("F946").schema();
+        this.f9470 = readerSchema.getField("F947").schema();
+        this.f9480 = readerSchema.getField("F948").schema();
+        this.f9490 = readerSchema.getField("F949").schema();
+        this.f9500 = readerSchema.getField("F950").schema();
+        this.f9510 = readerSchema.getField("F951").schema();
+        this.f9520 = readerSchema.getField("F952").schema();
+        this.f9530 = readerSchema.getField("F953").schema();
+        this.f9540 = readerSchema.getField("F954").schema();
+        this.f9550 = readerSchema.getField("F955").schema();
+        this.f9560 = readerSchema.getField("F956").schema();
+        this.f9570 = readerSchema.getField("F957").schema();
+        this.f9580 = readerSchema.getField("F958").schema();
+        this.f9590 = readerSchema.getField("F959").schema();
+        this.f9600 = readerSchema.getField("F960").schema();
+        this.f9610 = readerSchema.getField("F961").schema();
+        this.f9620 = readerSchema.getField("F962").schema();
+        this.f9630 = readerSchema.getField("F963").schema();
+        this.f9640 = readerSchema.getField("F964").schema();
+        this.f9650 = readerSchema.getField("F965").schema();
+        this.f9660 = readerSchema.getField("F966").schema();
+        this.f9670 = readerSchema.getField("F967").schema();
+        this.f9680 = readerSchema.getField("F968").schema();
+        this.f9690 = readerSchema.getField("F969").schema();
+        this.f9700 = readerSchema.getField("F970").schema();
+        this.f9710 = readerSchema.getField("F971").schema();
+        this.f9720 = readerSchema.getField("F972").schema();
+        this.f9730 = readerSchema.getField("F973").schema();
+        this.f9740 = readerSchema.getField("F974").schema();
+        this.f9750 = readerSchema.getField("F975").schema();
+        this.f9760 = readerSchema.getField("F976").schema();
+        this.f9770 = readerSchema.getField("F977").schema();
+        this.f9780 = readerSchema.getField("F978").schema();
+        this.f9790 = readerSchema.getField("F979").schema();
+        this.f9800 = readerSchema.getField("F980").schema();
+        this.f9810 = readerSchema.getField("F981").schema();
+        this.f9820 = readerSchema.getField("F982").schema();
+        this.f9830 = readerSchema.getField("F983").schema();
+        this.f9840 = readerSchema.getField("F984").schema();
+        this.f9850 = readerSchema.getField("F985").schema();
+        this.f9860 = readerSchema.getField("F986").schema();
+        this.f9870 = readerSchema.getField("F987").schema();
+        this.f9880 = readerSchema.getField("F988").schema();
+        this.f9890 = readerSchema.getField("F989").schema();
+        this.f9900 = readerSchema.getField("F990").schema();
+        this.f9910 = readerSchema.getField("F991").schema();
+        this.f9920 = readerSchema.getField("F992").schema();
+        this.f9930 = readerSchema.getField("F993").schema();
+        this.f9940 = readerSchema.getField("F994").schema();
+        this.f9950 = readerSchema.getField("F995").schema();
+        this.f9960 = readerSchema.getField("F996").schema();
+        this.f9970 = readerSchema.getField("F997").schema();
+        this.f9980 = readerSchema.getField("F998").schema();
+        this.f9990 = readerSchema.getField("F999").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F0': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F1': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(2);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(3);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F3': "+ unionIndex3));
+            }
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence4;
+                Object oldString4 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(4);
+                if (oldString4 instanceof Utf8) {
+                    charSequence4 = (decoder).readString(((Utf8) oldString4));
+                } else {
+                    charSequence4 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, charSequence4);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F4': "+ unionIndex4));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Utf8 charSequence5;
+                Object oldString5 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(5);
+                if (oldString5 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) oldString5));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, charSequence5);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F5': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence6;
+                Object oldString6 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(6);
+                if (oldString6 instanceof Utf8) {
+                    charSequence6 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence6 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, charSequence6);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F6': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence7;
+                Object oldString7 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(7);
+                if (oldString7 instanceof Utf8) {
+                    charSequence7 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence7 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, charSequence7);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F7': "+ unionIndex7));
+            }
+        }
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, null);
+        } else {
+            if (unionIndex8 == 1) {
+                Utf8 charSequence8;
+                Object oldString8 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(8);
+                if (oldString8 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString8));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, charSequence8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F8': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, null);
+        } else {
+            if (unionIndex9 == 1) {
+                Utf8 charSequence9;
+                Object oldString9 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(9);
+                if (oldString9 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString9));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F9': "+ unionIndex9));
+            }
+        }
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, null);
+        } else {
+            if (unionIndex10 == 1) {
+                Utf8 charSequence10;
+                Object oldString10 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(10);
+                if (oldString10 instanceof Utf8) {
+                    charSequence10 = (decoder).readString(((Utf8) oldString10));
+                } else {
+                    charSequence10 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, charSequence10);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F10': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, null);
+        } else {
+            if (unionIndex11 == 1) {
+                Utf8 charSequence11;
+                Object oldString11 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(11);
+                if (oldString11 instanceof Utf8) {
+                    charSequence11 = (decoder).readString(((Utf8) oldString11));
+                } else {
+                    charSequence11 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, charSequence11);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F11': "+ unionIndex11));
+            }
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence12;
+                Object oldString12 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(12);
+                if (oldString12 instanceof Utf8) {
+                    charSequence12 = (decoder).readString(((Utf8) oldString12));
+                } else {
+                    charSequence12 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, charSequence12);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F12': "+ unionIndex12));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence13;
+                Object oldString13 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(13);
+                if (oldString13 instanceof Utf8) {
+                    charSequence13 = (decoder).readString(((Utf8) oldString13));
+                } else {
+                    charSequence13 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, charSequence13);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F13': "+ unionIndex13));
+            }
+        }
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence14;
+                Object oldString14 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(14);
+                if (oldString14 instanceof Utf8) {
+                    charSequence14 = (decoder).readString(((Utf8) oldString14));
+                } else {
+                    charSequence14 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, charSequence14);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F14': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence15;
+                Object oldString15 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(15);
+                if (oldString15 instanceof Utf8) {
+                    charSequence15 = (decoder).readString(((Utf8) oldString15));
+                } else {
+                    charSequence15 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, charSequence15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F15': "+ unionIndex15));
+            }
+        }
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Utf8 charSequence16;
+                Object oldString16 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(16);
+                if (oldString16 instanceof Utf8) {
+                    charSequence16 = (decoder).readString(((Utf8) oldString16));
+                } else {
+                    charSequence16 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, charSequence16);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F16': "+ unionIndex16));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Utf8 charSequence17;
+                Object oldString17 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(17);
+                if (oldString17 instanceof Utf8) {
+                    charSequence17 = (decoder).readString(((Utf8) oldString17));
+                } else {
+                    charSequence17 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, charSequence17);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F17': "+ unionIndex17));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Utf8 charSequence18;
+                Object oldString18 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(18);
+                if (oldString18 instanceof Utf8) {
+                    charSequence18 = (decoder).readString(((Utf8) oldString18));
+                } else {
+                    charSequence18 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, charSequence18);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F18': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex19 = (decoder.readIndex());
+        if (unionIndex19 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, null);
+        } else {
+            if (unionIndex19 == 1) {
+                Utf8 charSequence19;
+                Object oldString19 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(19);
+                if (oldString19 instanceof Utf8) {
+                    charSequence19 = (decoder).readString(((Utf8) oldString19));
+                } else {
+                    charSequence19 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, charSequence19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F19': "+ unionIndex19));
+            }
+        }
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, null);
+        } else {
+            if (unionIndex20 == 1) {
+                Utf8 charSequence20;
+                Object oldString20 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(20);
+                if (oldString20 instanceof Utf8) {
+                    charSequence20 = (decoder).readString(((Utf8) oldString20));
+                } else {
+                    charSequence20 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, charSequence20);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F20': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, null);
+        } else {
+            if (unionIndex21 == 1) {
+                Utf8 charSequence21;
+                Object oldString21 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(21);
+                if (oldString21 instanceof Utf8) {
+                    charSequence21 = (decoder).readString(((Utf8) oldString21));
+                } else {
+                    charSequence21 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, charSequence21);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F21': "+ unionIndex21));
+            }
+        }
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Utf8 charSequence22;
+                Object oldString22 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(22);
+                if (oldString22 instanceof Utf8) {
+                    charSequence22 = (decoder).readString(((Utf8) oldString22));
+                } else {
+                    charSequence22 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, charSequence22);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F22': "+ unionIndex22));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Utf8 charSequence23;
+                Object oldString23 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(23);
+                if (oldString23 instanceof Utf8) {
+                    charSequence23 = (decoder).readString(((Utf8) oldString23));
+                } else {
+                    charSequence23 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, charSequence23);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F23': "+ unionIndex23));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Utf8 charSequence24;
+                Object oldString24 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(24);
+                if (oldString24 instanceof Utf8) {
+                    charSequence24 = (decoder).readString(((Utf8) oldString24));
+                } else {
+                    charSequence24 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, charSequence24);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F24': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, null);
+        } else {
+            if (unionIndex25 == 1) {
+                Utf8 charSequence25;
+                Object oldString25 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(25);
+                if (oldString25 instanceof Utf8) {
+                    charSequence25 = (decoder).readString(((Utf8) oldString25));
+                } else {
+                    charSequence25 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, charSequence25);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F25': "+ unionIndex25));
+            }
+        }
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, null);
+        } else {
+            if (unionIndex26 == 1) {
+                Utf8 charSequence26;
+                Object oldString26 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(26);
+                if (oldString26 instanceof Utf8) {
+                    charSequence26 = (decoder).readString(((Utf8) oldString26));
+                } else {
+                    charSequence26 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, charSequence26);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F26': "+ unionIndex26));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex27 = (decoder.readIndex());
+        if (unionIndex27 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, null);
+        } else {
+            if (unionIndex27 == 1) {
+                Utf8 charSequence27;
+                Object oldString27 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(27);
+                if (oldString27 instanceof Utf8) {
+                    charSequence27 = (decoder).readString(((Utf8) oldString27));
+                } else {
+                    charSequence27 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, charSequence27);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F27': "+ unionIndex27));
+            }
+        }
+        int unionIndex28 = (decoder.readIndex());
+        if (unionIndex28 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, null);
+        } else {
+            if (unionIndex28 == 1) {
+                Utf8 charSequence28;
+                Object oldString28 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(28);
+                if (oldString28 instanceof Utf8) {
+                    charSequence28 = (decoder).readString(((Utf8) oldString28));
+                } else {
+                    charSequence28 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, charSequence28);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F28': "+ unionIndex28));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex29 = (decoder.readIndex());
+        if (unionIndex29 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, null);
+        } else {
+            if (unionIndex29 == 1) {
+                Utf8 charSequence29;
+                Object oldString29 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(29);
+                if (oldString29 instanceof Utf8) {
+                    charSequence29 = (decoder).readString(((Utf8) oldString29));
+                } else {
+                    charSequence29 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, charSequence29);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F29': "+ unionIndex29));
+            }
+        }
+        int unionIndex30 = (decoder.readIndex());
+        if (unionIndex30 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, null);
+        } else {
+            if (unionIndex30 == 1) {
+                Utf8 charSequence30;
+                Object oldString30 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(30);
+                if (oldString30 instanceof Utf8) {
+                    charSequence30 = (decoder).readString(((Utf8) oldString30));
+                } else {
+                    charSequence30 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, charSequence30);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F30': "+ unionIndex30));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex31 = (decoder.readIndex());
+        if (unionIndex31 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, null);
+        } else {
+            if (unionIndex31 == 1) {
+                Utf8 charSequence31;
+                Object oldString31 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(31);
+                if (oldString31 instanceof Utf8) {
+                    charSequence31 = (decoder).readString(((Utf8) oldString31));
+                } else {
+                    charSequence31 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, charSequence31);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F31': "+ unionIndex31));
+            }
+        }
+        int unionIndex32 = (decoder.readIndex());
+        if (unionIndex32 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, null);
+        } else {
+            if (unionIndex32 == 1) {
+                Utf8 charSequence32;
+                Object oldString32 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(32);
+                if (oldString32 instanceof Utf8) {
+                    charSequence32 = (decoder).readString(((Utf8) oldString32));
+                } else {
+                    charSequence32 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, charSequence32);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F32': "+ unionIndex32));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex33 = (decoder.readIndex());
+        if (unionIndex33 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, null);
+        } else {
+            if (unionIndex33 == 1) {
+                Utf8 charSequence33;
+                Object oldString33 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(33);
+                if (oldString33 instanceof Utf8) {
+                    charSequence33 = (decoder).readString(((Utf8) oldString33));
+                } else {
+                    charSequence33 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, charSequence33);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F33': "+ unionIndex33));
+            }
+        }
+        int unionIndex34 = (decoder.readIndex());
+        if (unionIndex34 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, null);
+        } else {
+            if (unionIndex34 == 1) {
+                Utf8 charSequence34;
+                Object oldString34 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(34);
+                if (oldString34 instanceof Utf8) {
+                    charSequence34 = (decoder).readString(((Utf8) oldString34));
+                } else {
+                    charSequence34 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, charSequence34);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F34': "+ unionIndex34));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex35 = (decoder.readIndex());
+        if (unionIndex35 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, null);
+        } else {
+            if (unionIndex35 == 1) {
+                Utf8 charSequence35;
+                Object oldString35 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(35);
+                if (oldString35 instanceof Utf8) {
+                    charSequence35 = (decoder).readString(((Utf8) oldString35));
+                } else {
+                    charSequence35 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, charSequence35);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F35': "+ unionIndex35));
+            }
+        }
+        int unionIndex36 = (decoder.readIndex());
+        if (unionIndex36 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, null);
+        } else {
+            if (unionIndex36 == 1) {
+                Utf8 charSequence36;
+                Object oldString36 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(36);
+                if (oldString36 instanceof Utf8) {
+                    charSequence36 = (decoder).readString(((Utf8) oldString36));
+                } else {
+                    charSequence36 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, charSequence36);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F36': "+ unionIndex36));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex37 = (decoder.readIndex());
+        if (unionIndex37 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, null);
+        } else {
+            if (unionIndex37 == 1) {
+                Utf8 charSequence37;
+                Object oldString37 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(37);
+                if (oldString37 instanceof Utf8) {
+                    charSequence37 = (decoder).readString(((Utf8) oldString37));
+                } else {
+                    charSequence37 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, charSequence37);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F37': "+ unionIndex37));
+            }
+        }
+        int unionIndex38 = (decoder.readIndex());
+        if (unionIndex38 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, null);
+        } else {
+            if (unionIndex38 == 1) {
+                Utf8 charSequence38;
+                Object oldString38 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(38);
+                if (oldString38 instanceof Utf8) {
+                    charSequence38 = (decoder).readString(((Utf8) oldString38));
+                } else {
+                    charSequence38 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, charSequence38);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F38': "+ unionIndex38));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex39 = (decoder.readIndex());
+        if (unionIndex39 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, null);
+        } else {
+            if (unionIndex39 == 1) {
+                Utf8 charSequence39;
+                Object oldString39 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(39);
+                if (oldString39 instanceof Utf8) {
+                    charSequence39 = (decoder).readString(((Utf8) oldString39));
+                } else {
+                    charSequence39 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, charSequence39);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F39': "+ unionIndex39));
+            }
+        }
+        int unionIndex40 = (decoder.readIndex());
+        if (unionIndex40 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, null);
+        } else {
+            if (unionIndex40 == 1) {
+                Utf8 charSequence40;
+                Object oldString40 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(40);
+                if (oldString40 instanceof Utf8) {
+                    charSequence40 = (decoder).readString(((Utf8) oldString40));
+                } else {
+                    charSequence40 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, charSequence40);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F40': "+ unionIndex40));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex41 = (decoder.readIndex());
+        if (unionIndex41 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, null);
+        } else {
+            if (unionIndex41 == 1) {
+                Utf8 charSequence41;
+                Object oldString41 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(41);
+                if (oldString41 instanceof Utf8) {
+                    charSequence41 = (decoder).readString(((Utf8) oldString41));
+                } else {
+                    charSequence41 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, charSequence41);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F41': "+ unionIndex41));
+            }
+        }
+        int unionIndex42 = (decoder.readIndex());
+        if (unionIndex42 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, null);
+        } else {
+            if (unionIndex42 == 1) {
+                Utf8 charSequence42;
+                Object oldString42 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(42);
+                if (oldString42 instanceof Utf8) {
+                    charSequence42 = (decoder).readString(((Utf8) oldString42));
+                } else {
+                    charSequence42 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, charSequence42);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F42': "+ unionIndex42));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex43 = (decoder.readIndex());
+        if (unionIndex43 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, null);
+        } else {
+            if (unionIndex43 == 1) {
+                Utf8 charSequence43;
+                Object oldString43 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(43);
+                if (oldString43 instanceof Utf8) {
+                    charSequence43 = (decoder).readString(((Utf8) oldString43));
+                } else {
+                    charSequence43 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, charSequence43);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F43': "+ unionIndex43));
+            }
+        }
+        int unionIndex44 = (decoder.readIndex());
+        if (unionIndex44 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, null);
+        } else {
+            if (unionIndex44 == 1) {
+                Utf8 charSequence44;
+                Object oldString44 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(44);
+                if (oldString44 instanceof Utf8) {
+                    charSequence44 = (decoder).readString(((Utf8) oldString44));
+                } else {
+                    charSequence44 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, charSequence44);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F44': "+ unionIndex44));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex45 = (decoder.readIndex());
+        if (unionIndex45 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, null);
+        } else {
+            if (unionIndex45 == 1) {
+                Utf8 charSequence45;
+                Object oldString45 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(45);
+                if (oldString45 instanceof Utf8) {
+                    charSequence45 = (decoder).readString(((Utf8) oldString45));
+                } else {
+                    charSequence45 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, charSequence45);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F45': "+ unionIndex45));
+            }
+        }
+        int unionIndex46 = (decoder.readIndex());
+        if (unionIndex46 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, null);
+        } else {
+            if (unionIndex46 == 1) {
+                Utf8 charSequence46;
+                Object oldString46 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(46);
+                if (oldString46 instanceof Utf8) {
+                    charSequence46 = (decoder).readString(((Utf8) oldString46));
+                } else {
+                    charSequence46 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, charSequence46);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F46': "+ unionIndex46));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex47 = (decoder.readIndex());
+        if (unionIndex47 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, null);
+        } else {
+            if (unionIndex47 == 1) {
+                Utf8 charSequence47;
+                Object oldString47 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(47);
+                if (oldString47 instanceof Utf8) {
+                    charSequence47 = (decoder).readString(((Utf8) oldString47));
+                } else {
+                    charSequence47 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, charSequence47);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F47': "+ unionIndex47));
+            }
+        }
+        int unionIndex48 = (decoder.readIndex());
+        if (unionIndex48 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, null);
+        } else {
+            if (unionIndex48 == 1) {
+                Utf8 charSequence48;
+                Object oldString48 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(48);
+                if (oldString48 instanceof Utf8) {
+                    charSequence48 = (decoder).readString(((Utf8) oldString48));
+                } else {
+                    charSequence48 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, charSequence48);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F48': "+ unionIndex48));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex49 = (decoder.readIndex());
+        if (unionIndex49 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, null);
+        } else {
+            if (unionIndex49 == 1) {
+                Utf8 charSequence49;
+                Object oldString49 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(49);
+                if (oldString49 instanceof Utf8) {
+                    charSequence49 = (decoder).readString(((Utf8) oldString49));
+                } else {
+                    charSequence49 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, charSequence49);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F49': "+ unionIndex49));
+            }
+        }
+        int unionIndex50 = (decoder.readIndex());
+        if (unionIndex50 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, null);
+        } else {
+            if (unionIndex50 == 1) {
+                Utf8 charSequence50;
+                Object oldString50 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(50);
+                if (oldString50 instanceof Utf8) {
+                    charSequence50 = (decoder).readString(((Utf8) oldString50));
+                } else {
+                    charSequence50 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, charSequence50);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F50': "+ unionIndex50));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex51 = (decoder.readIndex());
+        if (unionIndex51 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, null);
+        } else {
+            if (unionIndex51 == 1) {
+                Utf8 charSequence51;
+                Object oldString51 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(51);
+                if (oldString51 instanceof Utf8) {
+                    charSequence51 = (decoder).readString(((Utf8) oldString51));
+                } else {
+                    charSequence51 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, charSequence51);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F51': "+ unionIndex51));
+            }
+        }
+        int unionIndex52 = (decoder.readIndex());
+        if (unionIndex52 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, null);
+        } else {
+            if (unionIndex52 == 1) {
+                Utf8 charSequence52;
+                Object oldString52 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(52);
+                if (oldString52 instanceof Utf8) {
+                    charSequence52 = (decoder).readString(((Utf8) oldString52));
+                } else {
+                    charSequence52 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, charSequence52);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F52': "+ unionIndex52));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex53 = (decoder.readIndex());
+        if (unionIndex53 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, null);
+        } else {
+            if (unionIndex53 == 1) {
+                Utf8 charSequence53;
+                Object oldString53 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(53);
+                if (oldString53 instanceof Utf8) {
+                    charSequence53 = (decoder).readString(((Utf8) oldString53));
+                } else {
+                    charSequence53 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, charSequence53);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F53': "+ unionIndex53));
+            }
+        }
+        int unionIndex54 = (decoder.readIndex());
+        if (unionIndex54 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, null);
+        } else {
+            if (unionIndex54 == 1) {
+                Utf8 charSequence54;
+                Object oldString54 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(54);
+                if (oldString54 instanceof Utf8) {
+                    charSequence54 = (decoder).readString(((Utf8) oldString54));
+                } else {
+                    charSequence54 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, charSequence54);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F54': "+ unionIndex54));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex55 = (decoder.readIndex());
+        if (unionIndex55 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, null);
+        } else {
+            if (unionIndex55 == 1) {
+                Utf8 charSequence55;
+                Object oldString55 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(55);
+                if (oldString55 instanceof Utf8) {
+                    charSequence55 = (decoder).readString(((Utf8) oldString55));
+                } else {
+                    charSequence55 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, charSequence55);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F55': "+ unionIndex55));
+            }
+        }
+        int unionIndex56 = (decoder.readIndex());
+        if (unionIndex56 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, null);
+        } else {
+            if (unionIndex56 == 1) {
+                Utf8 charSequence56;
+                Object oldString56 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(56);
+                if (oldString56 instanceof Utf8) {
+                    charSequence56 = (decoder).readString(((Utf8) oldString56));
+                } else {
+                    charSequence56 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, charSequence56);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F56': "+ unionIndex56));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex57 = (decoder.readIndex());
+        if (unionIndex57 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, null);
+        } else {
+            if (unionIndex57 == 1) {
+                Utf8 charSequence57;
+                Object oldString57 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(57);
+                if (oldString57 instanceof Utf8) {
+                    charSequence57 = (decoder).readString(((Utf8) oldString57));
+                } else {
+                    charSequence57 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, charSequence57);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F57': "+ unionIndex57));
+            }
+        }
+        int unionIndex58 = (decoder.readIndex());
+        if (unionIndex58 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, null);
+        } else {
+            if (unionIndex58 == 1) {
+                Utf8 charSequence58;
+                Object oldString58 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(58);
+                if (oldString58 instanceof Utf8) {
+                    charSequence58 = (decoder).readString(((Utf8) oldString58));
+                } else {
+                    charSequence58 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, charSequence58);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F58': "+ unionIndex58));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex59 = (decoder.readIndex());
+        if (unionIndex59 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, null);
+        } else {
+            if (unionIndex59 == 1) {
+                Utf8 charSequence59;
+                Object oldString59 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(59);
+                if (oldString59 instanceof Utf8) {
+                    charSequence59 = (decoder).readString(((Utf8) oldString59));
+                } else {
+                    charSequence59 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, charSequence59);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F59': "+ unionIndex59));
+            }
+        }
+        int unionIndex60 = (decoder.readIndex());
+        if (unionIndex60 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, null);
+        } else {
+            if (unionIndex60 == 1) {
+                Utf8 charSequence60;
+                Object oldString60 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(60);
+                if (oldString60 instanceof Utf8) {
+                    charSequence60 = (decoder).readString(((Utf8) oldString60));
+                } else {
+                    charSequence60 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, charSequence60);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F60': "+ unionIndex60));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex61 = (decoder.readIndex());
+        if (unionIndex61 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, null);
+        } else {
+            if (unionIndex61 == 1) {
+                Utf8 charSequence61;
+                Object oldString61 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(61);
+                if (oldString61 instanceof Utf8) {
+                    charSequence61 = (decoder).readString(((Utf8) oldString61));
+                } else {
+                    charSequence61 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, charSequence61);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F61': "+ unionIndex61));
+            }
+        }
+        int unionIndex62 = (decoder.readIndex());
+        if (unionIndex62 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, null);
+        } else {
+            if (unionIndex62 == 1) {
+                Utf8 charSequence62;
+                Object oldString62 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(62);
+                if (oldString62 instanceof Utf8) {
+                    charSequence62 = (decoder).readString(((Utf8) oldString62));
+                } else {
+                    charSequence62 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, charSequence62);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F62': "+ unionIndex62));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex63 = (decoder.readIndex());
+        if (unionIndex63 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, null);
+        } else {
+            if (unionIndex63 == 1) {
+                Utf8 charSequence63;
+                Object oldString63 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(63);
+                if (oldString63 instanceof Utf8) {
+                    charSequence63 = (decoder).readString(((Utf8) oldString63));
+                } else {
+                    charSequence63 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, charSequence63);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F63': "+ unionIndex63));
+            }
+        }
+        int unionIndex64 = (decoder.readIndex());
+        if (unionIndex64 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, null);
+        } else {
+            if (unionIndex64 == 1) {
+                Utf8 charSequence64;
+                Object oldString64 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(64);
+                if (oldString64 instanceof Utf8) {
+                    charSequence64 = (decoder).readString(((Utf8) oldString64));
+                } else {
+                    charSequence64 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, charSequence64);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F64': "+ unionIndex64));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex65 = (decoder.readIndex());
+        if (unionIndex65 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, null);
+        } else {
+            if (unionIndex65 == 1) {
+                Utf8 charSequence65;
+                Object oldString65 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(65);
+                if (oldString65 instanceof Utf8) {
+                    charSequence65 = (decoder).readString(((Utf8) oldString65));
+                } else {
+                    charSequence65 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, charSequence65);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F65': "+ unionIndex65));
+            }
+        }
+        int unionIndex66 = (decoder.readIndex());
+        if (unionIndex66 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, null);
+        } else {
+            if (unionIndex66 == 1) {
+                Utf8 charSequence66;
+                Object oldString66 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(66);
+                if (oldString66 instanceof Utf8) {
+                    charSequence66 = (decoder).readString(((Utf8) oldString66));
+                } else {
+                    charSequence66 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, charSequence66);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F66': "+ unionIndex66));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex67 = (decoder.readIndex());
+        if (unionIndex67 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, null);
+        } else {
+            if (unionIndex67 == 1) {
+                Utf8 charSequence67;
+                Object oldString67 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(67);
+                if (oldString67 instanceof Utf8) {
+                    charSequence67 = (decoder).readString(((Utf8) oldString67));
+                } else {
+                    charSequence67 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, charSequence67);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F67': "+ unionIndex67));
+            }
+        }
+        int unionIndex68 = (decoder.readIndex());
+        if (unionIndex68 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, null);
+        } else {
+            if (unionIndex68 == 1) {
+                Utf8 charSequence68;
+                Object oldString68 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(68);
+                if (oldString68 instanceof Utf8) {
+                    charSequence68 = (decoder).readString(((Utf8) oldString68));
+                } else {
+                    charSequence68 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, charSequence68);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F68': "+ unionIndex68));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex69 = (decoder.readIndex());
+        if (unionIndex69 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, null);
+        } else {
+            if (unionIndex69 == 1) {
+                Utf8 charSequence69;
+                Object oldString69 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(69);
+                if (oldString69 instanceof Utf8) {
+                    charSequence69 = (decoder).readString(((Utf8) oldString69));
+                } else {
+                    charSequence69 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, charSequence69);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F69': "+ unionIndex69));
+            }
+        }
+        int unionIndex70 = (decoder.readIndex());
+        if (unionIndex70 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, null);
+        } else {
+            if (unionIndex70 == 1) {
+                Utf8 charSequence70;
+                Object oldString70 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(70);
+                if (oldString70 instanceof Utf8) {
+                    charSequence70 = (decoder).readString(((Utf8) oldString70));
+                } else {
+                    charSequence70 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, charSequence70);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F70': "+ unionIndex70));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex71 = (decoder.readIndex());
+        if (unionIndex71 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, null);
+        } else {
+            if (unionIndex71 == 1) {
+                Utf8 charSequence71;
+                Object oldString71 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(71);
+                if (oldString71 instanceof Utf8) {
+                    charSequence71 = (decoder).readString(((Utf8) oldString71));
+                } else {
+                    charSequence71 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, charSequence71);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F71': "+ unionIndex71));
+            }
+        }
+        int unionIndex72 = (decoder.readIndex());
+        if (unionIndex72 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, null);
+        } else {
+            if (unionIndex72 == 1) {
+                Utf8 charSequence72;
+                Object oldString72 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(72);
+                if (oldString72 instanceof Utf8) {
+                    charSequence72 = (decoder).readString(((Utf8) oldString72));
+                } else {
+                    charSequence72 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, charSequence72);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F72': "+ unionIndex72));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex73 = (decoder.readIndex());
+        if (unionIndex73 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, null);
+        } else {
+            if (unionIndex73 == 1) {
+                Utf8 charSequence73;
+                Object oldString73 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(73);
+                if (oldString73 instanceof Utf8) {
+                    charSequence73 = (decoder).readString(((Utf8) oldString73));
+                } else {
+                    charSequence73 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, charSequence73);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F73': "+ unionIndex73));
+            }
+        }
+        int unionIndex74 = (decoder.readIndex());
+        if (unionIndex74 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, null);
+        } else {
+            if (unionIndex74 == 1) {
+                Utf8 charSequence74;
+                Object oldString74 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(74);
+                if (oldString74 instanceof Utf8) {
+                    charSequence74 = (decoder).readString(((Utf8) oldString74));
+                } else {
+                    charSequence74 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, charSequence74);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F74': "+ unionIndex74));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex75 = (decoder.readIndex());
+        if (unionIndex75 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, null);
+        } else {
+            if (unionIndex75 == 1) {
+                Utf8 charSequence75;
+                Object oldString75 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(75);
+                if (oldString75 instanceof Utf8) {
+                    charSequence75 = (decoder).readString(((Utf8) oldString75));
+                } else {
+                    charSequence75 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, charSequence75);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F75': "+ unionIndex75));
+            }
+        }
+        int unionIndex76 = (decoder.readIndex());
+        if (unionIndex76 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, null);
+        } else {
+            if (unionIndex76 == 1) {
+                Utf8 charSequence76;
+                Object oldString76 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(76);
+                if (oldString76 instanceof Utf8) {
+                    charSequence76 = (decoder).readString(((Utf8) oldString76));
+                } else {
+                    charSequence76 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, charSequence76);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F76': "+ unionIndex76));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex77 = (decoder.readIndex());
+        if (unionIndex77 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, null);
+        } else {
+            if (unionIndex77 == 1) {
+                Utf8 charSequence77;
+                Object oldString77 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(77);
+                if (oldString77 instanceof Utf8) {
+                    charSequence77 = (decoder).readString(((Utf8) oldString77));
+                } else {
+                    charSequence77 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, charSequence77);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F77': "+ unionIndex77));
+            }
+        }
+        int unionIndex78 = (decoder.readIndex());
+        if (unionIndex78 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, null);
+        } else {
+            if (unionIndex78 == 1) {
+                Utf8 charSequence78;
+                Object oldString78 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(78);
+                if (oldString78 instanceof Utf8) {
+                    charSequence78 = (decoder).readString(((Utf8) oldString78));
+                } else {
+                    charSequence78 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, charSequence78);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F78': "+ unionIndex78));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex79 = (decoder.readIndex());
+        if (unionIndex79 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, null);
+        } else {
+            if (unionIndex79 == 1) {
+                Utf8 charSequence79;
+                Object oldString79 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(79);
+                if (oldString79 instanceof Utf8) {
+                    charSequence79 = (decoder).readString(((Utf8) oldString79));
+                } else {
+                    charSequence79 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, charSequence79);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F79': "+ unionIndex79));
+            }
+        }
+        int unionIndex80 = (decoder.readIndex());
+        if (unionIndex80 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, null);
+        } else {
+            if (unionIndex80 == 1) {
+                Utf8 charSequence80;
+                Object oldString80 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(80);
+                if (oldString80 instanceof Utf8) {
+                    charSequence80 = (decoder).readString(((Utf8) oldString80));
+                } else {
+                    charSequence80 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, charSequence80);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F80': "+ unionIndex80));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex81 = (decoder.readIndex());
+        if (unionIndex81 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, null);
+        } else {
+            if (unionIndex81 == 1) {
+                Utf8 charSequence81;
+                Object oldString81 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(81);
+                if (oldString81 instanceof Utf8) {
+                    charSequence81 = (decoder).readString(((Utf8) oldString81));
+                } else {
+                    charSequence81 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, charSequence81);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F81': "+ unionIndex81));
+            }
+        }
+        int unionIndex82 = (decoder.readIndex());
+        if (unionIndex82 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, null);
+        } else {
+            if (unionIndex82 == 1) {
+                Utf8 charSequence82;
+                Object oldString82 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(82);
+                if (oldString82 instanceof Utf8) {
+                    charSequence82 = (decoder).readString(((Utf8) oldString82));
+                } else {
+                    charSequence82 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, charSequence82);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F82': "+ unionIndex82));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex83 = (decoder.readIndex());
+        if (unionIndex83 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, null);
+        } else {
+            if (unionIndex83 == 1) {
+                Utf8 charSequence83;
+                Object oldString83 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(83);
+                if (oldString83 instanceof Utf8) {
+                    charSequence83 = (decoder).readString(((Utf8) oldString83));
+                } else {
+                    charSequence83 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, charSequence83);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F83': "+ unionIndex83));
+            }
+        }
+        int unionIndex84 = (decoder.readIndex());
+        if (unionIndex84 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, null);
+        } else {
+            if (unionIndex84 == 1) {
+                Utf8 charSequence84;
+                Object oldString84 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(84);
+                if (oldString84 instanceof Utf8) {
+                    charSequence84 = (decoder).readString(((Utf8) oldString84));
+                } else {
+                    charSequence84 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, charSequence84);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F84': "+ unionIndex84));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex85 = (decoder.readIndex());
+        if (unionIndex85 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, null);
+        } else {
+            if (unionIndex85 == 1) {
+                Utf8 charSequence85;
+                Object oldString85 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(85);
+                if (oldString85 instanceof Utf8) {
+                    charSequence85 = (decoder).readString(((Utf8) oldString85));
+                } else {
+                    charSequence85 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, charSequence85);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F85': "+ unionIndex85));
+            }
+        }
+        int unionIndex86 = (decoder.readIndex());
+        if (unionIndex86 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, null);
+        } else {
+            if (unionIndex86 == 1) {
+                Utf8 charSequence86;
+                Object oldString86 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(86);
+                if (oldString86 instanceof Utf8) {
+                    charSequence86 = (decoder).readString(((Utf8) oldString86));
+                } else {
+                    charSequence86 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, charSequence86);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F86': "+ unionIndex86));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex87 = (decoder.readIndex());
+        if (unionIndex87 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, null);
+        } else {
+            if (unionIndex87 == 1) {
+                Utf8 charSequence87;
+                Object oldString87 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(87);
+                if (oldString87 instanceof Utf8) {
+                    charSequence87 = (decoder).readString(((Utf8) oldString87));
+                } else {
+                    charSequence87 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, charSequence87);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F87': "+ unionIndex87));
+            }
+        }
+        int unionIndex88 = (decoder.readIndex());
+        if (unionIndex88 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, null);
+        } else {
+            if (unionIndex88 == 1) {
+                Utf8 charSequence88;
+                Object oldString88 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(88);
+                if (oldString88 instanceof Utf8) {
+                    charSequence88 = (decoder).readString(((Utf8) oldString88));
+                } else {
+                    charSequence88 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, charSequence88);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F88': "+ unionIndex88));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex89 = (decoder.readIndex());
+        if (unionIndex89 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, null);
+        } else {
+            if (unionIndex89 == 1) {
+                Utf8 charSequence89;
+                Object oldString89 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(89);
+                if (oldString89 instanceof Utf8) {
+                    charSequence89 = (decoder).readString(((Utf8) oldString89));
+                } else {
+                    charSequence89 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, charSequence89);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F89': "+ unionIndex89));
+            }
+        }
+        int unionIndex90 = (decoder.readIndex());
+        if (unionIndex90 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, null);
+        } else {
+            if (unionIndex90 == 1) {
+                Utf8 charSequence90;
+                Object oldString90 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(90);
+                if (oldString90 instanceof Utf8) {
+                    charSequence90 = (decoder).readString(((Utf8) oldString90));
+                } else {
+                    charSequence90 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, charSequence90);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F90': "+ unionIndex90));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex91 = (decoder.readIndex());
+        if (unionIndex91 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, null);
+        } else {
+            if (unionIndex91 == 1) {
+                Utf8 charSequence91;
+                Object oldString91 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(91);
+                if (oldString91 instanceof Utf8) {
+                    charSequence91 = (decoder).readString(((Utf8) oldString91));
+                } else {
+                    charSequence91 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, charSequence91);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F91': "+ unionIndex91));
+            }
+        }
+        int unionIndex92 = (decoder.readIndex());
+        if (unionIndex92 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, null);
+        } else {
+            if (unionIndex92 == 1) {
+                Utf8 charSequence92;
+                Object oldString92 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(92);
+                if (oldString92 instanceof Utf8) {
+                    charSequence92 = (decoder).readString(((Utf8) oldString92));
+                } else {
+                    charSequence92 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, charSequence92);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F92': "+ unionIndex92));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex93 = (decoder.readIndex());
+        if (unionIndex93 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, null);
+        } else {
+            if (unionIndex93 == 1) {
+                Utf8 charSequence93;
+                Object oldString93 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(93);
+                if (oldString93 instanceof Utf8) {
+                    charSequence93 = (decoder).readString(((Utf8) oldString93));
+                } else {
+                    charSequence93 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, charSequence93);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F93': "+ unionIndex93));
+            }
+        }
+        int unionIndex94 = (decoder.readIndex());
+        if (unionIndex94 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, null);
+        } else {
+            if (unionIndex94 == 1) {
+                Utf8 charSequence94;
+                Object oldString94 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(94);
+                if (oldString94 instanceof Utf8) {
+                    charSequence94 = (decoder).readString(((Utf8) oldString94));
+                } else {
+                    charSequence94 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, charSequence94);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F94': "+ unionIndex94));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex95 = (decoder.readIndex());
+        if (unionIndex95 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, null);
+        } else {
+            if (unionIndex95 == 1) {
+                Utf8 charSequence95;
+                Object oldString95 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(95);
+                if (oldString95 instanceof Utf8) {
+                    charSequence95 = (decoder).readString(((Utf8) oldString95));
+                } else {
+                    charSequence95 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, charSequence95);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F95': "+ unionIndex95));
+            }
+        }
+        int unionIndex96 = (decoder.readIndex());
+        if (unionIndex96 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, null);
+        } else {
+            if (unionIndex96 == 1) {
+                Utf8 charSequence96;
+                Object oldString96 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(96);
+                if (oldString96 instanceof Utf8) {
+                    charSequence96 = (decoder).readString(((Utf8) oldString96));
+                } else {
+                    charSequence96 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, charSequence96);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F96': "+ unionIndex96));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex97 = (decoder.readIndex());
+        if (unionIndex97 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, null);
+        } else {
+            if (unionIndex97 == 1) {
+                Utf8 charSequence97;
+                Object oldString97 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(97);
+                if (oldString97 instanceof Utf8) {
+                    charSequence97 = (decoder).readString(((Utf8) oldString97));
+                } else {
+                    charSequence97 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, charSequence97);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F97': "+ unionIndex97));
+            }
+        }
+        int unionIndex98 = (decoder.readIndex());
+        if (unionIndex98 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, null);
+        } else {
+            if (unionIndex98 == 1) {
+                Utf8 charSequence98;
+                Object oldString98 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(98);
+                if (oldString98 instanceof Utf8) {
+                    charSequence98 = (decoder).readString(((Utf8) oldString98));
+                } else {
+                    charSequence98 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, charSequence98);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F98': "+ unionIndex98));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex99 = (decoder.readIndex());
+        if (unionIndex99 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, null);
+        } else {
+            if (unionIndex99 == 1) {
+                Utf8 charSequence99;
+                Object oldString99 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(99);
+                if (oldString99 instanceof Utf8) {
+                    charSequence99 = (decoder).readString(((Utf8) oldString99));
+                } else {
+                    charSequence99 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, charSequence99);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F99': "+ unionIndex99));
+            }
+        }
+        int unionIndex100 = (decoder.readIndex());
+        if (unionIndex100 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, null);
+        } else {
+            if (unionIndex100 == 1) {
+                Utf8 charSequence100;
+                Object oldString100 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(100);
+                if (oldString100 instanceof Utf8) {
+                    charSequence100 = (decoder).readString(((Utf8) oldString100));
+                } else {
+                    charSequence100 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, charSequence100);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F100': "+ unionIndex100));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex101 = (decoder.readIndex());
+        if (unionIndex101 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, null);
+        } else {
+            if (unionIndex101 == 1) {
+                Utf8 charSequence101;
+                Object oldString101 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(101);
+                if (oldString101 instanceof Utf8) {
+                    charSequence101 = (decoder).readString(((Utf8) oldString101));
+                } else {
+                    charSequence101 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, charSequence101);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F101': "+ unionIndex101));
+            }
+        }
+        int unionIndex102 = (decoder.readIndex());
+        if (unionIndex102 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, null);
+        } else {
+            if (unionIndex102 == 1) {
+                Utf8 charSequence102;
+                Object oldString102 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(102);
+                if (oldString102 instanceof Utf8) {
+                    charSequence102 = (decoder).readString(((Utf8) oldString102));
+                } else {
+                    charSequence102 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, charSequence102);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F102': "+ unionIndex102));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex103 = (decoder.readIndex());
+        if (unionIndex103 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, null);
+        } else {
+            if (unionIndex103 == 1) {
+                Utf8 charSequence103;
+                Object oldString103 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(103);
+                if (oldString103 instanceof Utf8) {
+                    charSequence103 = (decoder).readString(((Utf8) oldString103));
+                } else {
+                    charSequence103 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, charSequence103);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F103': "+ unionIndex103));
+            }
+        }
+        int unionIndex104 = (decoder.readIndex());
+        if (unionIndex104 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, null);
+        } else {
+            if (unionIndex104 == 1) {
+                Utf8 charSequence104;
+                Object oldString104 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(104);
+                if (oldString104 instanceof Utf8) {
+                    charSequence104 = (decoder).readString(((Utf8) oldString104));
+                } else {
+                    charSequence104 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, charSequence104);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F104': "+ unionIndex104));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex105 = (decoder.readIndex());
+        if (unionIndex105 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, null);
+        } else {
+            if (unionIndex105 == 1) {
+                Utf8 charSequence105;
+                Object oldString105 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(105);
+                if (oldString105 instanceof Utf8) {
+                    charSequence105 = (decoder).readString(((Utf8) oldString105));
+                } else {
+                    charSequence105 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, charSequence105);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F105': "+ unionIndex105));
+            }
+        }
+        int unionIndex106 = (decoder.readIndex());
+        if (unionIndex106 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, null);
+        } else {
+            if (unionIndex106 == 1) {
+                Utf8 charSequence106;
+                Object oldString106 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(106);
+                if (oldString106 instanceof Utf8) {
+                    charSequence106 = (decoder).readString(((Utf8) oldString106));
+                } else {
+                    charSequence106 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, charSequence106);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F106': "+ unionIndex106));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex107 = (decoder.readIndex());
+        if (unionIndex107 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, null);
+        } else {
+            if (unionIndex107 == 1) {
+                Utf8 charSequence107;
+                Object oldString107 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(107);
+                if (oldString107 instanceof Utf8) {
+                    charSequence107 = (decoder).readString(((Utf8) oldString107));
+                } else {
+                    charSequence107 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, charSequence107);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F107': "+ unionIndex107));
+            }
+        }
+        int unionIndex108 = (decoder.readIndex());
+        if (unionIndex108 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, null);
+        } else {
+            if (unionIndex108 == 1) {
+                Utf8 charSequence108;
+                Object oldString108 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(108);
+                if (oldString108 instanceof Utf8) {
+                    charSequence108 = (decoder).readString(((Utf8) oldString108));
+                } else {
+                    charSequence108 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, charSequence108);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F108': "+ unionIndex108));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex109 = (decoder.readIndex());
+        if (unionIndex109 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, null);
+        } else {
+            if (unionIndex109 == 1) {
+                Utf8 charSequence109;
+                Object oldString109 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(109);
+                if (oldString109 instanceof Utf8) {
+                    charSequence109 = (decoder).readString(((Utf8) oldString109));
+                } else {
+                    charSequence109 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, charSequence109);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F109': "+ unionIndex109));
+            }
+        }
+        int unionIndex110 = (decoder.readIndex());
+        if (unionIndex110 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, null);
+        } else {
+            if (unionIndex110 == 1) {
+                Utf8 charSequence110;
+                Object oldString110 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(110);
+                if (oldString110 instanceof Utf8) {
+                    charSequence110 = (decoder).readString(((Utf8) oldString110));
+                } else {
+                    charSequence110 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, charSequence110);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F110': "+ unionIndex110));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex111 = (decoder.readIndex());
+        if (unionIndex111 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, null);
+        } else {
+            if (unionIndex111 == 1) {
+                Utf8 charSequence111;
+                Object oldString111 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(111);
+                if (oldString111 instanceof Utf8) {
+                    charSequence111 = (decoder).readString(((Utf8) oldString111));
+                } else {
+                    charSequence111 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, charSequence111);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F111': "+ unionIndex111));
+            }
+        }
+        int unionIndex112 = (decoder.readIndex());
+        if (unionIndex112 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, null);
+        } else {
+            if (unionIndex112 == 1) {
+                Utf8 charSequence112;
+                Object oldString112 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(112);
+                if (oldString112 instanceof Utf8) {
+                    charSequence112 = (decoder).readString(((Utf8) oldString112));
+                } else {
+                    charSequence112 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, charSequence112);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F112': "+ unionIndex112));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex113 = (decoder.readIndex());
+        if (unionIndex113 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, null);
+        } else {
+            if (unionIndex113 == 1) {
+                Utf8 charSequence113;
+                Object oldString113 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(113);
+                if (oldString113 instanceof Utf8) {
+                    charSequence113 = (decoder).readString(((Utf8) oldString113));
+                } else {
+                    charSequence113 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, charSequence113);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F113': "+ unionIndex113));
+            }
+        }
+        int unionIndex114 = (decoder.readIndex());
+        if (unionIndex114 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, null);
+        } else {
+            if (unionIndex114 == 1) {
+                Utf8 charSequence114;
+                Object oldString114 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(114);
+                if (oldString114 instanceof Utf8) {
+                    charSequence114 = (decoder).readString(((Utf8) oldString114));
+                } else {
+                    charSequence114 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, charSequence114);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F114': "+ unionIndex114));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex115 = (decoder.readIndex());
+        if (unionIndex115 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, null);
+        } else {
+            if (unionIndex115 == 1) {
+                Utf8 charSequence115;
+                Object oldString115 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(115);
+                if (oldString115 instanceof Utf8) {
+                    charSequence115 = (decoder).readString(((Utf8) oldString115));
+                } else {
+                    charSequence115 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, charSequence115);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F115': "+ unionIndex115));
+            }
+        }
+        int unionIndex116 = (decoder.readIndex());
+        if (unionIndex116 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, null);
+        } else {
+            if (unionIndex116 == 1) {
+                Utf8 charSequence116;
+                Object oldString116 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(116);
+                if (oldString116 instanceof Utf8) {
+                    charSequence116 = (decoder).readString(((Utf8) oldString116));
+                } else {
+                    charSequence116 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, charSequence116);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F116': "+ unionIndex116));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex117 = (decoder.readIndex());
+        if (unionIndex117 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, null);
+        } else {
+            if (unionIndex117 == 1) {
+                Utf8 charSequence117;
+                Object oldString117 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(117);
+                if (oldString117 instanceof Utf8) {
+                    charSequence117 = (decoder).readString(((Utf8) oldString117));
+                } else {
+                    charSequence117 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, charSequence117);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F117': "+ unionIndex117));
+            }
+        }
+        int unionIndex118 = (decoder.readIndex());
+        if (unionIndex118 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, null);
+        } else {
+            if (unionIndex118 == 1) {
+                Utf8 charSequence118;
+                Object oldString118 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(118);
+                if (oldString118 instanceof Utf8) {
+                    charSequence118 = (decoder).readString(((Utf8) oldString118));
+                } else {
+                    charSequence118 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, charSequence118);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F118': "+ unionIndex118));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex119 = (decoder.readIndex());
+        if (unionIndex119 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, null);
+        } else {
+            if (unionIndex119 == 1) {
+                Utf8 charSequence119;
+                Object oldString119 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(119);
+                if (oldString119 instanceof Utf8) {
+                    charSequence119 = (decoder).readString(((Utf8) oldString119));
+                } else {
+                    charSequence119 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, charSequence119);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F119': "+ unionIndex119));
+            }
+        }
+        int unionIndex120 = (decoder.readIndex());
+        if (unionIndex120 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, null);
+        } else {
+            if (unionIndex120 == 1) {
+                Utf8 charSequence120;
+                Object oldString120 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(120);
+                if (oldString120 instanceof Utf8) {
+                    charSequence120 = (decoder).readString(((Utf8) oldString120));
+                } else {
+                    charSequence120 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, charSequence120);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F120': "+ unionIndex120));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex121 = (decoder.readIndex());
+        if (unionIndex121 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, null);
+        } else {
+            if (unionIndex121 == 1) {
+                Utf8 charSequence121;
+                Object oldString121 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(121);
+                if (oldString121 instanceof Utf8) {
+                    charSequence121 = (decoder).readString(((Utf8) oldString121));
+                } else {
+                    charSequence121 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, charSequence121);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F121': "+ unionIndex121));
+            }
+        }
+        int unionIndex122 = (decoder.readIndex());
+        if (unionIndex122 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, null);
+        } else {
+            if (unionIndex122 == 1) {
+                Utf8 charSequence122;
+                Object oldString122 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(122);
+                if (oldString122 instanceof Utf8) {
+                    charSequence122 = (decoder).readString(((Utf8) oldString122));
+                } else {
+                    charSequence122 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, charSequence122);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F122': "+ unionIndex122));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex123 = (decoder.readIndex());
+        if (unionIndex123 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, null);
+        } else {
+            if (unionIndex123 == 1) {
+                Utf8 charSequence123;
+                Object oldString123 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(123);
+                if (oldString123 instanceof Utf8) {
+                    charSequence123 = (decoder).readString(((Utf8) oldString123));
+                } else {
+                    charSequence123 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, charSequence123);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F123': "+ unionIndex123));
+            }
+        }
+        int unionIndex124 = (decoder.readIndex());
+        if (unionIndex124 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, null);
+        } else {
+            if (unionIndex124 == 1) {
+                Utf8 charSequence124;
+                Object oldString124 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(124);
+                if (oldString124 instanceof Utf8) {
+                    charSequence124 = (decoder).readString(((Utf8) oldString124));
+                } else {
+                    charSequence124 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, charSequence124);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F124': "+ unionIndex124));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex125 = (decoder.readIndex());
+        if (unionIndex125 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, null);
+        } else {
+            if (unionIndex125 == 1) {
+                Utf8 charSequence125;
+                Object oldString125 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(125);
+                if (oldString125 instanceof Utf8) {
+                    charSequence125 = (decoder).readString(((Utf8) oldString125));
+                } else {
+                    charSequence125 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, charSequence125);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F125': "+ unionIndex125));
+            }
+        }
+        int unionIndex126 = (decoder.readIndex());
+        if (unionIndex126 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, null);
+        } else {
+            if (unionIndex126 == 1) {
+                Utf8 charSequence126;
+                Object oldString126 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(126);
+                if (oldString126 instanceof Utf8) {
+                    charSequence126 = (decoder).readString(((Utf8) oldString126));
+                } else {
+                    charSequence126 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, charSequence126);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F126': "+ unionIndex126));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex127 = (decoder.readIndex());
+        if (unionIndex127 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, null);
+        } else {
+            if (unionIndex127 == 1) {
+                Utf8 charSequence127;
+                Object oldString127 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(127);
+                if (oldString127 instanceof Utf8) {
+                    charSequence127 = (decoder).readString(((Utf8) oldString127));
+                } else {
+                    charSequence127 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, charSequence127);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F127': "+ unionIndex127));
+            }
+        }
+        int unionIndex128 = (decoder.readIndex());
+        if (unionIndex128 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, null);
+        } else {
+            if (unionIndex128 == 1) {
+                Utf8 charSequence128;
+                Object oldString128 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(128);
+                if (oldString128 instanceof Utf8) {
+                    charSequence128 = (decoder).readString(((Utf8) oldString128));
+                } else {
+                    charSequence128 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, charSequence128);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F128': "+ unionIndex128));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex129 = (decoder.readIndex());
+        if (unionIndex129 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, null);
+        } else {
+            if (unionIndex129 == 1) {
+                Utf8 charSequence129;
+                Object oldString129 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(129);
+                if (oldString129 instanceof Utf8) {
+                    charSequence129 = (decoder).readString(((Utf8) oldString129));
+                } else {
+                    charSequence129 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, charSequence129);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F129': "+ unionIndex129));
+            }
+        }
+        int unionIndex130 = (decoder.readIndex());
+        if (unionIndex130 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, null);
+        } else {
+            if (unionIndex130 == 1) {
+                Utf8 charSequence130;
+                Object oldString130 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(130);
+                if (oldString130 instanceof Utf8) {
+                    charSequence130 = (decoder).readString(((Utf8) oldString130));
+                } else {
+                    charSequence130 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, charSequence130);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F130': "+ unionIndex130));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex131 = (decoder.readIndex());
+        if (unionIndex131 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, null);
+        } else {
+            if (unionIndex131 == 1) {
+                Utf8 charSequence131;
+                Object oldString131 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(131);
+                if (oldString131 instanceof Utf8) {
+                    charSequence131 = (decoder).readString(((Utf8) oldString131));
+                } else {
+                    charSequence131 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, charSequence131);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F131': "+ unionIndex131));
+            }
+        }
+        int unionIndex132 = (decoder.readIndex());
+        if (unionIndex132 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, null);
+        } else {
+            if (unionIndex132 == 1) {
+                Utf8 charSequence132;
+                Object oldString132 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(132);
+                if (oldString132 instanceof Utf8) {
+                    charSequence132 = (decoder).readString(((Utf8) oldString132));
+                } else {
+                    charSequence132 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, charSequence132);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F132': "+ unionIndex132));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex133 = (decoder.readIndex());
+        if (unionIndex133 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, null);
+        } else {
+            if (unionIndex133 == 1) {
+                Utf8 charSequence133;
+                Object oldString133 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(133);
+                if (oldString133 instanceof Utf8) {
+                    charSequence133 = (decoder).readString(((Utf8) oldString133));
+                } else {
+                    charSequence133 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, charSequence133);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F133': "+ unionIndex133));
+            }
+        }
+        int unionIndex134 = (decoder.readIndex());
+        if (unionIndex134 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, null);
+        } else {
+            if (unionIndex134 == 1) {
+                Utf8 charSequence134;
+                Object oldString134 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(134);
+                if (oldString134 instanceof Utf8) {
+                    charSequence134 = (decoder).readString(((Utf8) oldString134));
+                } else {
+                    charSequence134 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, charSequence134);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F134': "+ unionIndex134));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex135 = (decoder.readIndex());
+        if (unionIndex135 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, null);
+        } else {
+            if (unionIndex135 == 1) {
+                Utf8 charSequence135;
+                Object oldString135 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(135);
+                if (oldString135 instanceof Utf8) {
+                    charSequence135 = (decoder).readString(((Utf8) oldString135));
+                } else {
+                    charSequence135 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, charSequence135);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F135': "+ unionIndex135));
+            }
+        }
+        int unionIndex136 = (decoder.readIndex());
+        if (unionIndex136 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, null);
+        } else {
+            if (unionIndex136 == 1) {
+                Utf8 charSequence136;
+                Object oldString136 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(136);
+                if (oldString136 instanceof Utf8) {
+                    charSequence136 = (decoder).readString(((Utf8) oldString136));
+                } else {
+                    charSequence136 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, charSequence136);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F136': "+ unionIndex136));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex137 = (decoder.readIndex());
+        if (unionIndex137 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, null);
+        } else {
+            if (unionIndex137 == 1) {
+                Utf8 charSequence137;
+                Object oldString137 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(137);
+                if (oldString137 instanceof Utf8) {
+                    charSequence137 = (decoder).readString(((Utf8) oldString137));
+                } else {
+                    charSequence137 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, charSequence137);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F137': "+ unionIndex137));
+            }
+        }
+        int unionIndex138 = (decoder.readIndex());
+        if (unionIndex138 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, null);
+        } else {
+            if (unionIndex138 == 1) {
+                Utf8 charSequence138;
+                Object oldString138 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(138);
+                if (oldString138 instanceof Utf8) {
+                    charSequence138 = (decoder).readString(((Utf8) oldString138));
+                } else {
+                    charSequence138 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, charSequence138);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F138': "+ unionIndex138));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex139 = (decoder.readIndex());
+        if (unionIndex139 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, null);
+        } else {
+            if (unionIndex139 == 1) {
+                Utf8 charSequence139;
+                Object oldString139 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(139);
+                if (oldString139 instanceof Utf8) {
+                    charSequence139 = (decoder).readString(((Utf8) oldString139));
+                } else {
+                    charSequence139 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, charSequence139);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F139': "+ unionIndex139));
+            }
+        }
+        int unionIndex140 = (decoder.readIndex());
+        if (unionIndex140 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, null);
+        } else {
+            if (unionIndex140 == 1) {
+                Utf8 charSequence140;
+                Object oldString140 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(140);
+                if (oldString140 instanceof Utf8) {
+                    charSequence140 = (decoder).readString(((Utf8) oldString140));
+                } else {
+                    charSequence140 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, charSequence140);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F140': "+ unionIndex140));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex141 = (decoder.readIndex());
+        if (unionIndex141 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, null);
+        } else {
+            if (unionIndex141 == 1) {
+                Utf8 charSequence141;
+                Object oldString141 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(141);
+                if (oldString141 instanceof Utf8) {
+                    charSequence141 = (decoder).readString(((Utf8) oldString141));
+                } else {
+                    charSequence141 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, charSequence141);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F141': "+ unionIndex141));
+            }
+        }
+        int unionIndex142 = (decoder.readIndex());
+        if (unionIndex142 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, null);
+        } else {
+            if (unionIndex142 == 1) {
+                Utf8 charSequence142;
+                Object oldString142 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(142);
+                if (oldString142 instanceof Utf8) {
+                    charSequence142 = (decoder).readString(((Utf8) oldString142));
+                } else {
+                    charSequence142 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, charSequence142);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F142': "+ unionIndex142));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex143 = (decoder.readIndex());
+        if (unionIndex143 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, null);
+        } else {
+            if (unionIndex143 == 1) {
+                Utf8 charSequence143;
+                Object oldString143 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(143);
+                if (oldString143 instanceof Utf8) {
+                    charSequence143 = (decoder).readString(((Utf8) oldString143));
+                } else {
+                    charSequence143 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, charSequence143);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F143': "+ unionIndex143));
+            }
+        }
+        int unionIndex144 = (decoder.readIndex());
+        if (unionIndex144 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, null);
+        } else {
+            if (unionIndex144 == 1) {
+                Utf8 charSequence144;
+                Object oldString144 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(144);
+                if (oldString144 instanceof Utf8) {
+                    charSequence144 = (decoder).readString(((Utf8) oldString144));
+                } else {
+                    charSequence144 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, charSequence144);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F144': "+ unionIndex144));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex145 = (decoder.readIndex());
+        if (unionIndex145 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, null);
+        } else {
+            if (unionIndex145 == 1) {
+                Utf8 charSequence145;
+                Object oldString145 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(145);
+                if (oldString145 instanceof Utf8) {
+                    charSequence145 = (decoder).readString(((Utf8) oldString145));
+                } else {
+                    charSequence145 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, charSequence145);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F145': "+ unionIndex145));
+            }
+        }
+        int unionIndex146 = (decoder.readIndex());
+        if (unionIndex146 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, null);
+        } else {
+            if (unionIndex146 == 1) {
+                Utf8 charSequence146;
+                Object oldString146 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(146);
+                if (oldString146 instanceof Utf8) {
+                    charSequence146 = (decoder).readString(((Utf8) oldString146));
+                } else {
+                    charSequence146 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, charSequence146);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F146': "+ unionIndex146));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex147 = (decoder.readIndex());
+        if (unionIndex147 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, null);
+        } else {
+            if (unionIndex147 == 1) {
+                Utf8 charSequence147;
+                Object oldString147 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(147);
+                if (oldString147 instanceof Utf8) {
+                    charSequence147 = (decoder).readString(((Utf8) oldString147));
+                } else {
+                    charSequence147 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, charSequence147);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F147': "+ unionIndex147));
+            }
+        }
+        int unionIndex148 = (decoder.readIndex());
+        if (unionIndex148 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, null);
+        } else {
+            if (unionIndex148 == 1) {
+                Utf8 charSequence148;
+                Object oldString148 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(148);
+                if (oldString148 instanceof Utf8) {
+                    charSequence148 = (decoder).readString(((Utf8) oldString148));
+                } else {
+                    charSequence148 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, charSequence148);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F148': "+ unionIndex148));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex149 = (decoder.readIndex());
+        if (unionIndex149 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, null);
+        } else {
+            if (unionIndex149 == 1) {
+                Utf8 charSequence149;
+                Object oldString149 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(149);
+                if (oldString149 instanceof Utf8) {
+                    charSequence149 = (decoder).readString(((Utf8) oldString149));
+                } else {
+                    charSequence149 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, charSequence149);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F149': "+ unionIndex149));
+            }
+        }
+        int unionIndex150 = (decoder.readIndex());
+        if (unionIndex150 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, null);
+        } else {
+            if (unionIndex150 == 1) {
+                Utf8 charSequence150;
+                Object oldString150 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(150);
+                if (oldString150 instanceof Utf8) {
+                    charSequence150 = (decoder).readString(((Utf8) oldString150));
+                } else {
+                    charSequence150 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, charSequence150);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F150': "+ unionIndex150));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex151 = (decoder.readIndex());
+        if (unionIndex151 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, null);
+        } else {
+            if (unionIndex151 == 1) {
+                Utf8 charSequence151;
+                Object oldString151 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(151);
+                if (oldString151 instanceof Utf8) {
+                    charSequence151 = (decoder).readString(((Utf8) oldString151));
+                } else {
+                    charSequence151 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, charSequence151);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F151': "+ unionIndex151));
+            }
+        }
+        int unionIndex152 = (decoder.readIndex());
+        if (unionIndex152 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, null);
+        } else {
+            if (unionIndex152 == 1) {
+                Utf8 charSequence152;
+                Object oldString152 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(152);
+                if (oldString152 instanceof Utf8) {
+                    charSequence152 = (decoder).readString(((Utf8) oldString152));
+                } else {
+                    charSequence152 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, charSequence152);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F152': "+ unionIndex152));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex153 = (decoder.readIndex());
+        if (unionIndex153 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, null);
+        } else {
+            if (unionIndex153 == 1) {
+                Utf8 charSequence153;
+                Object oldString153 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(153);
+                if (oldString153 instanceof Utf8) {
+                    charSequence153 = (decoder).readString(((Utf8) oldString153));
+                } else {
+                    charSequence153 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, charSequence153);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F153': "+ unionIndex153));
+            }
+        }
+        int unionIndex154 = (decoder.readIndex());
+        if (unionIndex154 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, null);
+        } else {
+            if (unionIndex154 == 1) {
+                Utf8 charSequence154;
+                Object oldString154 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(154);
+                if (oldString154 instanceof Utf8) {
+                    charSequence154 = (decoder).readString(((Utf8) oldString154));
+                } else {
+                    charSequence154 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, charSequence154);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F154': "+ unionIndex154));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex155 = (decoder.readIndex());
+        if (unionIndex155 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, null);
+        } else {
+            if (unionIndex155 == 1) {
+                Utf8 charSequence155;
+                Object oldString155 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(155);
+                if (oldString155 instanceof Utf8) {
+                    charSequence155 = (decoder).readString(((Utf8) oldString155));
+                } else {
+                    charSequence155 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, charSequence155);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F155': "+ unionIndex155));
+            }
+        }
+        int unionIndex156 = (decoder.readIndex());
+        if (unionIndex156 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, null);
+        } else {
+            if (unionIndex156 == 1) {
+                Utf8 charSequence156;
+                Object oldString156 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(156);
+                if (oldString156 instanceof Utf8) {
+                    charSequence156 = (decoder).readString(((Utf8) oldString156));
+                } else {
+                    charSequence156 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, charSequence156);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F156': "+ unionIndex156));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex157 = (decoder.readIndex());
+        if (unionIndex157 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, null);
+        } else {
+            if (unionIndex157 == 1) {
+                Utf8 charSequence157;
+                Object oldString157 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(157);
+                if (oldString157 instanceof Utf8) {
+                    charSequence157 = (decoder).readString(((Utf8) oldString157));
+                } else {
+                    charSequence157 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, charSequence157);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F157': "+ unionIndex157));
+            }
+        }
+        int unionIndex158 = (decoder.readIndex());
+        if (unionIndex158 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, null);
+        } else {
+            if (unionIndex158 == 1) {
+                Utf8 charSequence158;
+                Object oldString158 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(158);
+                if (oldString158 instanceof Utf8) {
+                    charSequence158 = (decoder).readString(((Utf8) oldString158));
+                } else {
+                    charSequence158 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, charSequence158);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F158': "+ unionIndex158));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex159 = (decoder.readIndex());
+        if (unionIndex159 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, null);
+        } else {
+            if (unionIndex159 == 1) {
+                Utf8 charSequence159;
+                Object oldString159 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(159);
+                if (oldString159 instanceof Utf8) {
+                    charSequence159 = (decoder).readString(((Utf8) oldString159));
+                } else {
+                    charSequence159 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, charSequence159);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F159': "+ unionIndex159));
+            }
+        }
+        int unionIndex160 = (decoder.readIndex());
+        if (unionIndex160 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, null);
+        } else {
+            if (unionIndex160 == 1) {
+                Utf8 charSequence160;
+                Object oldString160 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(160);
+                if (oldString160 instanceof Utf8) {
+                    charSequence160 = (decoder).readString(((Utf8) oldString160));
+                } else {
+                    charSequence160 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, charSequence160);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F160': "+ unionIndex160));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex161 = (decoder.readIndex());
+        if (unionIndex161 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, null);
+        } else {
+            if (unionIndex161 == 1) {
+                Utf8 charSequence161;
+                Object oldString161 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(161);
+                if (oldString161 instanceof Utf8) {
+                    charSequence161 = (decoder).readString(((Utf8) oldString161));
+                } else {
+                    charSequence161 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, charSequence161);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F161': "+ unionIndex161));
+            }
+        }
+        int unionIndex162 = (decoder.readIndex());
+        if (unionIndex162 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, null);
+        } else {
+            if (unionIndex162 == 1) {
+                Utf8 charSequence162;
+                Object oldString162 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(162);
+                if (oldString162 instanceof Utf8) {
+                    charSequence162 = (decoder).readString(((Utf8) oldString162));
+                } else {
+                    charSequence162 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, charSequence162);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F162': "+ unionIndex162));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex163 = (decoder.readIndex());
+        if (unionIndex163 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, null);
+        } else {
+            if (unionIndex163 == 1) {
+                Utf8 charSequence163;
+                Object oldString163 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(163);
+                if (oldString163 instanceof Utf8) {
+                    charSequence163 = (decoder).readString(((Utf8) oldString163));
+                } else {
+                    charSequence163 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, charSequence163);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F163': "+ unionIndex163));
+            }
+        }
+        int unionIndex164 = (decoder.readIndex());
+        if (unionIndex164 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, null);
+        } else {
+            if (unionIndex164 == 1) {
+                Utf8 charSequence164;
+                Object oldString164 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(164);
+                if (oldString164 instanceof Utf8) {
+                    charSequence164 = (decoder).readString(((Utf8) oldString164));
+                } else {
+                    charSequence164 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, charSequence164);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F164': "+ unionIndex164));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex165 = (decoder.readIndex());
+        if (unionIndex165 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, null);
+        } else {
+            if (unionIndex165 == 1) {
+                Utf8 charSequence165;
+                Object oldString165 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(165);
+                if (oldString165 instanceof Utf8) {
+                    charSequence165 = (decoder).readString(((Utf8) oldString165));
+                } else {
+                    charSequence165 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, charSequence165);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F165': "+ unionIndex165));
+            }
+        }
+        int unionIndex166 = (decoder.readIndex());
+        if (unionIndex166 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, null);
+        } else {
+            if (unionIndex166 == 1) {
+                Utf8 charSequence166;
+                Object oldString166 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(166);
+                if (oldString166 instanceof Utf8) {
+                    charSequence166 = (decoder).readString(((Utf8) oldString166));
+                } else {
+                    charSequence166 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, charSequence166);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F166': "+ unionIndex166));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex167 = (decoder.readIndex());
+        if (unionIndex167 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, null);
+        } else {
+            if (unionIndex167 == 1) {
+                Utf8 charSequence167;
+                Object oldString167 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(167);
+                if (oldString167 instanceof Utf8) {
+                    charSequence167 = (decoder).readString(((Utf8) oldString167));
+                } else {
+                    charSequence167 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, charSequence167);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F167': "+ unionIndex167));
+            }
+        }
+        int unionIndex168 = (decoder.readIndex());
+        if (unionIndex168 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, null);
+        } else {
+            if (unionIndex168 == 1) {
+                Utf8 charSequence168;
+                Object oldString168 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(168);
+                if (oldString168 instanceof Utf8) {
+                    charSequence168 = (decoder).readString(((Utf8) oldString168));
+                } else {
+                    charSequence168 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, charSequence168);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F168': "+ unionIndex168));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex169 = (decoder.readIndex());
+        if (unionIndex169 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, null);
+        } else {
+            if (unionIndex169 == 1) {
+                Utf8 charSequence169;
+                Object oldString169 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(169);
+                if (oldString169 instanceof Utf8) {
+                    charSequence169 = (decoder).readString(((Utf8) oldString169));
+                } else {
+                    charSequence169 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, charSequence169);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F169': "+ unionIndex169));
+            }
+        }
+        int unionIndex170 = (decoder.readIndex());
+        if (unionIndex170 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, null);
+        } else {
+            if (unionIndex170 == 1) {
+                Utf8 charSequence170;
+                Object oldString170 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(170);
+                if (oldString170 instanceof Utf8) {
+                    charSequence170 = (decoder).readString(((Utf8) oldString170));
+                } else {
+                    charSequence170 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, charSequence170);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F170': "+ unionIndex170));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex171 = (decoder.readIndex());
+        if (unionIndex171 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, null);
+        } else {
+            if (unionIndex171 == 1) {
+                Utf8 charSequence171;
+                Object oldString171 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(171);
+                if (oldString171 instanceof Utf8) {
+                    charSequence171 = (decoder).readString(((Utf8) oldString171));
+                } else {
+                    charSequence171 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, charSequence171);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F171': "+ unionIndex171));
+            }
+        }
+        int unionIndex172 = (decoder.readIndex());
+        if (unionIndex172 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, null);
+        } else {
+            if (unionIndex172 == 1) {
+                Utf8 charSequence172;
+                Object oldString172 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(172);
+                if (oldString172 instanceof Utf8) {
+                    charSequence172 = (decoder).readString(((Utf8) oldString172));
+                } else {
+                    charSequence172 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, charSequence172);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F172': "+ unionIndex172));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex173 = (decoder.readIndex());
+        if (unionIndex173 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, null);
+        } else {
+            if (unionIndex173 == 1) {
+                Utf8 charSequence173;
+                Object oldString173 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(173);
+                if (oldString173 instanceof Utf8) {
+                    charSequence173 = (decoder).readString(((Utf8) oldString173));
+                } else {
+                    charSequence173 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, charSequence173);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F173': "+ unionIndex173));
+            }
+        }
+        int unionIndex174 = (decoder.readIndex());
+        if (unionIndex174 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, null);
+        } else {
+            if (unionIndex174 == 1) {
+                Utf8 charSequence174;
+                Object oldString174 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(174);
+                if (oldString174 instanceof Utf8) {
+                    charSequence174 = (decoder).readString(((Utf8) oldString174));
+                } else {
+                    charSequence174 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, charSequence174);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F174': "+ unionIndex174));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex175 = (decoder.readIndex());
+        if (unionIndex175 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, null);
+        } else {
+            if (unionIndex175 == 1) {
+                Utf8 charSequence175;
+                Object oldString175 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(175);
+                if (oldString175 instanceof Utf8) {
+                    charSequence175 = (decoder).readString(((Utf8) oldString175));
+                } else {
+                    charSequence175 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, charSequence175);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F175': "+ unionIndex175));
+            }
+        }
+        int unionIndex176 = (decoder.readIndex());
+        if (unionIndex176 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, null);
+        } else {
+            if (unionIndex176 == 1) {
+                Utf8 charSequence176;
+                Object oldString176 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(176);
+                if (oldString176 instanceof Utf8) {
+                    charSequence176 = (decoder).readString(((Utf8) oldString176));
+                } else {
+                    charSequence176 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, charSequence176);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F176': "+ unionIndex176));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex177 = (decoder.readIndex());
+        if (unionIndex177 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, null);
+        } else {
+            if (unionIndex177 == 1) {
+                Utf8 charSequence177;
+                Object oldString177 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(177);
+                if (oldString177 instanceof Utf8) {
+                    charSequence177 = (decoder).readString(((Utf8) oldString177));
+                } else {
+                    charSequence177 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, charSequence177);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F177': "+ unionIndex177));
+            }
+        }
+        int unionIndex178 = (decoder.readIndex());
+        if (unionIndex178 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, null);
+        } else {
+            if (unionIndex178 == 1) {
+                Utf8 charSequence178;
+                Object oldString178 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(178);
+                if (oldString178 instanceof Utf8) {
+                    charSequence178 = (decoder).readString(((Utf8) oldString178));
+                } else {
+                    charSequence178 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, charSequence178);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F178': "+ unionIndex178));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex179 = (decoder.readIndex());
+        if (unionIndex179 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, null);
+        } else {
+            if (unionIndex179 == 1) {
+                Utf8 charSequence179;
+                Object oldString179 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(179);
+                if (oldString179 instanceof Utf8) {
+                    charSequence179 = (decoder).readString(((Utf8) oldString179));
+                } else {
+                    charSequence179 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, charSequence179);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F179': "+ unionIndex179));
+            }
+        }
+        int unionIndex180 = (decoder.readIndex());
+        if (unionIndex180 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, null);
+        } else {
+            if (unionIndex180 == 1) {
+                Utf8 charSequence180;
+                Object oldString180 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(180);
+                if (oldString180 instanceof Utf8) {
+                    charSequence180 = (decoder).readString(((Utf8) oldString180));
+                } else {
+                    charSequence180 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, charSequence180);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F180': "+ unionIndex180));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex181 = (decoder.readIndex());
+        if (unionIndex181 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, null);
+        } else {
+            if (unionIndex181 == 1) {
+                Utf8 charSequence181;
+                Object oldString181 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(181);
+                if (oldString181 instanceof Utf8) {
+                    charSequence181 = (decoder).readString(((Utf8) oldString181));
+                } else {
+                    charSequence181 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, charSequence181);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F181': "+ unionIndex181));
+            }
+        }
+        int unionIndex182 = (decoder.readIndex());
+        if (unionIndex182 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, null);
+        } else {
+            if (unionIndex182 == 1) {
+                Utf8 charSequence182;
+                Object oldString182 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(182);
+                if (oldString182 instanceof Utf8) {
+                    charSequence182 = (decoder).readString(((Utf8) oldString182));
+                } else {
+                    charSequence182 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, charSequence182);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F182': "+ unionIndex182));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex183 = (decoder.readIndex());
+        if (unionIndex183 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, null);
+        } else {
+            if (unionIndex183 == 1) {
+                Utf8 charSequence183;
+                Object oldString183 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(183);
+                if (oldString183 instanceof Utf8) {
+                    charSequence183 = (decoder).readString(((Utf8) oldString183));
+                } else {
+                    charSequence183 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, charSequence183);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F183': "+ unionIndex183));
+            }
+        }
+        int unionIndex184 = (decoder.readIndex());
+        if (unionIndex184 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, null);
+        } else {
+            if (unionIndex184 == 1) {
+                Utf8 charSequence184;
+                Object oldString184 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(184);
+                if (oldString184 instanceof Utf8) {
+                    charSequence184 = (decoder).readString(((Utf8) oldString184));
+                } else {
+                    charSequence184 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, charSequence184);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F184': "+ unionIndex184));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex185 = (decoder.readIndex());
+        if (unionIndex185 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, null);
+        } else {
+            if (unionIndex185 == 1) {
+                Utf8 charSequence185;
+                Object oldString185 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(185);
+                if (oldString185 instanceof Utf8) {
+                    charSequence185 = (decoder).readString(((Utf8) oldString185));
+                } else {
+                    charSequence185 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, charSequence185);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F185': "+ unionIndex185));
+            }
+        }
+        int unionIndex186 = (decoder.readIndex());
+        if (unionIndex186 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, null);
+        } else {
+            if (unionIndex186 == 1) {
+                Utf8 charSequence186;
+                Object oldString186 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(186);
+                if (oldString186 instanceof Utf8) {
+                    charSequence186 = (decoder).readString(((Utf8) oldString186));
+                } else {
+                    charSequence186 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, charSequence186);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F186': "+ unionIndex186));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex187 = (decoder.readIndex());
+        if (unionIndex187 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, null);
+        } else {
+            if (unionIndex187 == 1) {
+                Utf8 charSequence187;
+                Object oldString187 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(187);
+                if (oldString187 instanceof Utf8) {
+                    charSequence187 = (decoder).readString(((Utf8) oldString187));
+                } else {
+                    charSequence187 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, charSequence187);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F187': "+ unionIndex187));
+            }
+        }
+        int unionIndex188 = (decoder.readIndex());
+        if (unionIndex188 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, null);
+        } else {
+            if (unionIndex188 == 1) {
+                Utf8 charSequence188;
+                Object oldString188 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(188);
+                if (oldString188 instanceof Utf8) {
+                    charSequence188 = (decoder).readString(((Utf8) oldString188));
+                } else {
+                    charSequence188 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, charSequence188);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F188': "+ unionIndex188));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex189 = (decoder.readIndex());
+        if (unionIndex189 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, null);
+        } else {
+            if (unionIndex189 == 1) {
+                Utf8 charSequence189;
+                Object oldString189 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(189);
+                if (oldString189 instanceof Utf8) {
+                    charSequence189 = (decoder).readString(((Utf8) oldString189));
+                } else {
+                    charSequence189 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, charSequence189);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F189': "+ unionIndex189));
+            }
+        }
+        int unionIndex190 = (decoder.readIndex());
+        if (unionIndex190 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, null);
+        } else {
+            if (unionIndex190 == 1) {
+                Utf8 charSequence190;
+                Object oldString190 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(190);
+                if (oldString190 instanceof Utf8) {
+                    charSequence190 = (decoder).readString(((Utf8) oldString190));
+                } else {
+                    charSequence190 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, charSequence190);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F190': "+ unionIndex190));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex191 = (decoder.readIndex());
+        if (unionIndex191 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, null);
+        } else {
+            if (unionIndex191 == 1) {
+                Utf8 charSequence191;
+                Object oldString191 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(191);
+                if (oldString191 instanceof Utf8) {
+                    charSequence191 = (decoder).readString(((Utf8) oldString191));
+                } else {
+                    charSequence191 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, charSequence191);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F191': "+ unionIndex191));
+            }
+        }
+        int unionIndex192 = (decoder.readIndex());
+        if (unionIndex192 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, null);
+        } else {
+            if (unionIndex192 == 1) {
+                Utf8 charSequence192;
+                Object oldString192 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(192);
+                if (oldString192 instanceof Utf8) {
+                    charSequence192 = (decoder).readString(((Utf8) oldString192));
+                } else {
+                    charSequence192 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, charSequence192);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F192': "+ unionIndex192));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex193 = (decoder.readIndex());
+        if (unionIndex193 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, null);
+        } else {
+            if (unionIndex193 == 1) {
+                Utf8 charSequence193;
+                Object oldString193 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(193);
+                if (oldString193 instanceof Utf8) {
+                    charSequence193 = (decoder).readString(((Utf8) oldString193));
+                } else {
+                    charSequence193 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, charSequence193);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F193': "+ unionIndex193));
+            }
+        }
+        int unionIndex194 = (decoder.readIndex());
+        if (unionIndex194 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, null);
+        } else {
+            if (unionIndex194 == 1) {
+                Utf8 charSequence194;
+                Object oldString194 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(194);
+                if (oldString194 instanceof Utf8) {
+                    charSequence194 = (decoder).readString(((Utf8) oldString194));
+                } else {
+                    charSequence194 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, charSequence194);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F194': "+ unionIndex194));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex195 = (decoder.readIndex());
+        if (unionIndex195 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, null);
+        } else {
+            if (unionIndex195 == 1) {
+                Utf8 charSequence195;
+                Object oldString195 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(195);
+                if (oldString195 instanceof Utf8) {
+                    charSequence195 = (decoder).readString(((Utf8) oldString195));
+                } else {
+                    charSequence195 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, charSequence195);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F195': "+ unionIndex195));
+            }
+        }
+        int unionIndex196 = (decoder.readIndex());
+        if (unionIndex196 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, null);
+        } else {
+            if (unionIndex196 == 1) {
+                Utf8 charSequence196;
+                Object oldString196 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(196);
+                if (oldString196 instanceof Utf8) {
+                    charSequence196 = (decoder).readString(((Utf8) oldString196));
+                } else {
+                    charSequence196 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, charSequence196);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F196': "+ unionIndex196));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex197 = (decoder.readIndex());
+        if (unionIndex197 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, null);
+        } else {
+            if (unionIndex197 == 1) {
+                Utf8 charSequence197;
+                Object oldString197 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(197);
+                if (oldString197 instanceof Utf8) {
+                    charSequence197 = (decoder).readString(((Utf8) oldString197));
+                } else {
+                    charSequence197 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, charSequence197);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F197': "+ unionIndex197));
+            }
+        }
+        int unionIndex198 = (decoder.readIndex());
+        if (unionIndex198 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, null);
+        } else {
+            if (unionIndex198 == 1) {
+                Utf8 charSequence198;
+                Object oldString198 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(198);
+                if (oldString198 instanceof Utf8) {
+                    charSequence198 = (decoder).readString(((Utf8) oldString198));
+                } else {
+                    charSequence198 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, charSequence198);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F198': "+ unionIndex198));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex199 = (decoder.readIndex());
+        if (unionIndex199 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, null);
+        } else {
+            if (unionIndex199 == 1) {
+                Utf8 charSequence199;
+                Object oldString199 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(199);
+                if (oldString199 instanceof Utf8) {
+                    charSequence199 = (decoder).readString(((Utf8) oldString199));
+                } else {
+                    charSequence199 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, charSequence199);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F199': "+ unionIndex199));
+            }
+        }
+        int unionIndex200 = (decoder.readIndex());
+        if (unionIndex200 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, null);
+        } else {
+            if (unionIndex200 == 1) {
+                Utf8 charSequence200;
+                Object oldString200 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(200);
+                if (oldString200 instanceof Utf8) {
+                    charSequence200 = (decoder).readString(((Utf8) oldString200));
+                } else {
+                    charSequence200 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, charSequence200);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F200': "+ unionIndex200));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex201 = (decoder.readIndex());
+        if (unionIndex201 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, null);
+        } else {
+            if (unionIndex201 == 1) {
+                Utf8 charSequence201;
+                Object oldString201 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(201);
+                if (oldString201 instanceof Utf8) {
+                    charSequence201 = (decoder).readString(((Utf8) oldString201));
+                } else {
+                    charSequence201 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, charSequence201);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F201': "+ unionIndex201));
+            }
+        }
+        int unionIndex202 = (decoder.readIndex());
+        if (unionIndex202 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, null);
+        } else {
+            if (unionIndex202 == 1) {
+                Utf8 charSequence202;
+                Object oldString202 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(202);
+                if (oldString202 instanceof Utf8) {
+                    charSequence202 = (decoder).readString(((Utf8) oldString202));
+                } else {
+                    charSequence202 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, charSequence202);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F202': "+ unionIndex202));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex203 = (decoder.readIndex());
+        if (unionIndex203 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, null);
+        } else {
+            if (unionIndex203 == 1) {
+                Utf8 charSequence203;
+                Object oldString203 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(203);
+                if (oldString203 instanceof Utf8) {
+                    charSequence203 = (decoder).readString(((Utf8) oldString203));
+                } else {
+                    charSequence203 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, charSequence203);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F203': "+ unionIndex203));
+            }
+        }
+        int unionIndex204 = (decoder.readIndex());
+        if (unionIndex204 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, null);
+        } else {
+            if (unionIndex204 == 1) {
+                Utf8 charSequence204;
+                Object oldString204 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(204);
+                if (oldString204 instanceof Utf8) {
+                    charSequence204 = (decoder).readString(((Utf8) oldString204));
+                } else {
+                    charSequence204 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, charSequence204);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F204': "+ unionIndex204));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex205 = (decoder.readIndex());
+        if (unionIndex205 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, null);
+        } else {
+            if (unionIndex205 == 1) {
+                Utf8 charSequence205;
+                Object oldString205 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(205);
+                if (oldString205 instanceof Utf8) {
+                    charSequence205 = (decoder).readString(((Utf8) oldString205));
+                } else {
+                    charSequence205 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, charSequence205);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F205': "+ unionIndex205));
+            }
+        }
+        int unionIndex206 = (decoder.readIndex());
+        if (unionIndex206 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, null);
+        } else {
+            if (unionIndex206 == 1) {
+                Utf8 charSequence206;
+                Object oldString206 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(206);
+                if (oldString206 instanceof Utf8) {
+                    charSequence206 = (decoder).readString(((Utf8) oldString206));
+                } else {
+                    charSequence206 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, charSequence206);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F206': "+ unionIndex206));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex207 = (decoder.readIndex());
+        if (unionIndex207 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, null);
+        } else {
+            if (unionIndex207 == 1) {
+                Utf8 charSequence207;
+                Object oldString207 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(207);
+                if (oldString207 instanceof Utf8) {
+                    charSequence207 = (decoder).readString(((Utf8) oldString207));
+                } else {
+                    charSequence207 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, charSequence207);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F207': "+ unionIndex207));
+            }
+        }
+        int unionIndex208 = (decoder.readIndex());
+        if (unionIndex208 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, null);
+        } else {
+            if (unionIndex208 == 1) {
+                Utf8 charSequence208;
+                Object oldString208 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(208);
+                if (oldString208 instanceof Utf8) {
+                    charSequence208 = (decoder).readString(((Utf8) oldString208));
+                } else {
+                    charSequence208 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, charSequence208);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F208': "+ unionIndex208));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex209 = (decoder.readIndex());
+        if (unionIndex209 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, null);
+        } else {
+            if (unionIndex209 == 1) {
+                Utf8 charSequence209;
+                Object oldString209 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(209);
+                if (oldString209 instanceof Utf8) {
+                    charSequence209 = (decoder).readString(((Utf8) oldString209));
+                } else {
+                    charSequence209 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, charSequence209);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F209': "+ unionIndex209));
+            }
+        }
+        int unionIndex210 = (decoder.readIndex());
+        if (unionIndex210 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, null);
+        } else {
+            if (unionIndex210 == 1) {
+                Utf8 charSequence210;
+                Object oldString210 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(210);
+                if (oldString210 instanceof Utf8) {
+                    charSequence210 = (decoder).readString(((Utf8) oldString210));
+                } else {
+                    charSequence210 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, charSequence210);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F210': "+ unionIndex210));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex211 = (decoder.readIndex());
+        if (unionIndex211 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, null);
+        } else {
+            if (unionIndex211 == 1) {
+                Utf8 charSequence211;
+                Object oldString211 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(211);
+                if (oldString211 instanceof Utf8) {
+                    charSequence211 = (decoder).readString(((Utf8) oldString211));
+                } else {
+                    charSequence211 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, charSequence211);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F211': "+ unionIndex211));
+            }
+        }
+        int unionIndex212 = (decoder.readIndex());
+        if (unionIndex212 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, null);
+        } else {
+            if (unionIndex212 == 1) {
+                Utf8 charSequence212;
+                Object oldString212 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(212);
+                if (oldString212 instanceof Utf8) {
+                    charSequence212 = (decoder).readString(((Utf8) oldString212));
+                } else {
+                    charSequence212 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, charSequence212);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F212': "+ unionIndex212));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex213 = (decoder.readIndex());
+        if (unionIndex213 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, null);
+        } else {
+            if (unionIndex213 == 1) {
+                Utf8 charSequence213;
+                Object oldString213 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(213);
+                if (oldString213 instanceof Utf8) {
+                    charSequence213 = (decoder).readString(((Utf8) oldString213));
+                } else {
+                    charSequence213 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, charSequence213);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F213': "+ unionIndex213));
+            }
+        }
+        int unionIndex214 = (decoder.readIndex());
+        if (unionIndex214 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, null);
+        } else {
+            if (unionIndex214 == 1) {
+                Utf8 charSequence214;
+                Object oldString214 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(214);
+                if (oldString214 instanceof Utf8) {
+                    charSequence214 = (decoder).readString(((Utf8) oldString214));
+                } else {
+                    charSequence214 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, charSequence214);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F214': "+ unionIndex214));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex215 = (decoder.readIndex());
+        if (unionIndex215 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, null);
+        } else {
+            if (unionIndex215 == 1) {
+                Utf8 charSequence215;
+                Object oldString215 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(215);
+                if (oldString215 instanceof Utf8) {
+                    charSequence215 = (decoder).readString(((Utf8) oldString215));
+                } else {
+                    charSequence215 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, charSequence215);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F215': "+ unionIndex215));
+            }
+        }
+        int unionIndex216 = (decoder.readIndex());
+        if (unionIndex216 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, null);
+        } else {
+            if (unionIndex216 == 1) {
+                Utf8 charSequence216;
+                Object oldString216 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(216);
+                if (oldString216 instanceof Utf8) {
+                    charSequence216 = (decoder).readString(((Utf8) oldString216));
+                } else {
+                    charSequence216 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, charSequence216);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F216': "+ unionIndex216));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex217 = (decoder.readIndex());
+        if (unionIndex217 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, null);
+        } else {
+            if (unionIndex217 == 1) {
+                Utf8 charSequence217;
+                Object oldString217 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(217);
+                if (oldString217 instanceof Utf8) {
+                    charSequence217 = (decoder).readString(((Utf8) oldString217));
+                } else {
+                    charSequence217 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, charSequence217);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F217': "+ unionIndex217));
+            }
+        }
+        int unionIndex218 = (decoder.readIndex());
+        if (unionIndex218 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, null);
+        } else {
+            if (unionIndex218 == 1) {
+                Utf8 charSequence218;
+                Object oldString218 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(218);
+                if (oldString218 instanceof Utf8) {
+                    charSequence218 = (decoder).readString(((Utf8) oldString218));
+                } else {
+                    charSequence218 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, charSequence218);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F218': "+ unionIndex218));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex219 = (decoder.readIndex());
+        if (unionIndex219 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, null);
+        } else {
+            if (unionIndex219 == 1) {
+                Utf8 charSequence219;
+                Object oldString219 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(219);
+                if (oldString219 instanceof Utf8) {
+                    charSequence219 = (decoder).readString(((Utf8) oldString219));
+                } else {
+                    charSequence219 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, charSequence219);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F219': "+ unionIndex219));
+            }
+        }
+        int unionIndex220 = (decoder.readIndex());
+        if (unionIndex220 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, null);
+        } else {
+            if (unionIndex220 == 1) {
+                Utf8 charSequence220;
+                Object oldString220 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(220);
+                if (oldString220 instanceof Utf8) {
+                    charSequence220 = (decoder).readString(((Utf8) oldString220));
+                } else {
+                    charSequence220 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, charSequence220);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F220': "+ unionIndex220));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex221 = (decoder.readIndex());
+        if (unionIndex221 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, null);
+        } else {
+            if (unionIndex221 == 1) {
+                Utf8 charSequence221;
+                Object oldString221 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(221);
+                if (oldString221 instanceof Utf8) {
+                    charSequence221 = (decoder).readString(((Utf8) oldString221));
+                } else {
+                    charSequence221 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, charSequence221);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F221': "+ unionIndex221));
+            }
+        }
+        int unionIndex222 = (decoder.readIndex());
+        if (unionIndex222 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, null);
+        } else {
+            if (unionIndex222 == 1) {
+                Utf8 charSequence222;
+                Object oldString222 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(222);
+                if (oldString222 instanceof Utf8) {
+                    charSequence222 = (decoder).readString(((Utf8) oldString222));
+                } else {
+                    charSequence222 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, charSequence222);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F222': "+ unionIndex222));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex223 = (decoder.readIndex());
+        if (unionIndex223 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, null);
+        } else {
+            if (unionIndex223 == 1) {
+                Utf8 charSequence223;
+                Object oldString223 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(223);
+                if (oldString223 instanceof Utf8) {
+                    charSequence223 = (decoder).readString(((Utf8) oldString223));
+                } else {
+                    charSequence223 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, charSequence223);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F223': "+ unionIndex223));
+            }
+        }
+        int unionIndex224 = (decoder.readIndex());
+        if (unionIndex224 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, null);
+        } else {
+            if (unionIndex224 == 1) {
+                Utf8 charSequence224;
+                Object oldString224 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(224);
+                if (oldString224 instanceof Utf8) {
+                    charSequence224 = (decoder).readString(((Utf8) oldString224));
+                } else {
+                    charSequence224 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, charSequence224);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F224': "+ unionIndex224));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex225 = (decoder.readIndex());
+        if (unionIndex225 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, null);
+        } else {
+            if (unionIndex225 == 1) {
+                Utf8 charSequence225;
+                Object oldString225 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(225);
+                if (oldString225 instanceof Utf8) {
+                    charSequence225 = (decoder).readString(((Utf8) oldString225));
+                } else {
+                    charSequence225 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, charSequence225);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F225': "+ unionIndex225));
+            }
+        }
+        int unionIndex226 = (decoder.readIndex());
+        if (unionIndex226 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, null);
+        } else {
+            if (unionIndex226 == 1) {
+                Utf8 charSequence226;
+                Object oldString226 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(226);
+                if (oldString226 instanceof Utf8) {
+                    charSequence226 = (decoder).readString(((Utf8) oldString226));
+                } else {
+                    charSequence226 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, charSequence226);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F226': "+ unionIndex226));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex227 = (decoder.readIndex());
+        if (unionIndex227 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, null);
+        } else {
+            if (unionIndex227 == 1) {
+                Utf8 charSequence227;
+                Object oldString227 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(227);
+                if (oldString227 instanceof Utf8) {
+                    charSequence227 = (decoder).readString(((Utf8) oldString227));
+                } else {
+                    charSequence227 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, charSequence227);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F227': "+ unionIndex227));
+            }
+        }
+        int unionIndex228 = (decoder.readIndex());
+        if (unionIndex228 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, null);
+        } else {
+            if (unionIndex228 == 1) {
+                Utf8 charSequence228;
+                Object oldString228 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(228);
+                if (oldString228 instanceof Utf8) {
+                    charSequence228 = (decoder).readString(((Utf8) oldString228));
+                } else {
+                    charSequence228 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, charSequence228);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F228': "+ unionIndex228));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex229 = (decoder.readIndex());
+        if (unionIndex229 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, null);
+        } else {
+            if (unionIndex229 == 1) {
+                Utf8 charSequence229;
+                Object oldString229 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(229);
+                if (oldString229 instanceof Utf8) {
+                    charSequence229 = (decoder).readString(((Utf8) oldString229));
+                } else {
+                    charSequence229 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, charSequence229);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F229': "+ unionIndex229));
+            }
+        }
+        int unionIndex230 = (decoder.readIndex());
+        if (unionIndex230 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, null);
+        } else {
+            if (unionIndex230 == 1) {
+                Utf8 charSequence230;
+                Object oldString230 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(230);
+                if (oldString230 instanceof Utf8) {
+                    charSequence230 = (decoder).readString(((Utf8) oldString230));
+                } else {
+                    charSequence230 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, charSequence230);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F230': "+ unionIndex230));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex231 = (decoder.readIndex());
+        if (unionIndex231 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, null);
+        } else {
+            if (unionIndex231 == 1) {
+                Utf8 charSequence231;
+                Object oldString231 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(231);
+                if (oldString231 instanceof Utf8) {
+                    charSequence231 = (decoder).readString(((Utf8) oldString231));
+                } else {
+                    charSequence231 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, charSequence231);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F231': "+ unionIndex231));
+            }
+        }
+        int unionIndex232 = (decoder.readIndex());
+        if (unionIndex232 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, null);
+        } else {
+            if (unionIndex232 == 1) {
+                Utf8 charSequence232;
+                Object oldString232 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(232);
+                if (oldString232 instanceof Utf8) {
+                    charSequence232 = (decoder).readString(((Utf8) oldString232));
+                } else {
+                    charSequence232 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, charSequence232);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F232': "+ unionIndex232));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex233 = (decoder.readIndex());
+        if (unionIndex233 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, null);
+        } else {
+            if (unionIndex233 == 1) {
+                Utf8 charSequence233;
+                Object oldString233 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(233);
+                if (oldString233 instanceof Utf8) {
+                    charSequence233 = (decoder).readString(((Utf8) oldString233));
+                } else {
+                    charSequence233 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, charSequence233);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F233': "+ unionIndex233));
+            }
+        }
+        int unionIndex234 = (decoder.readIndex());
+        if (unionIndex234 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, null);
+        } else {
+            if (unionIndex234 == 1) {
+                Utf8 charSequence234;
+                Object oldString234 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(234);
+                if (oldString234 instanceof Utf8) {
+                    charSequence234 = (decoder).readString(((Utf8) oldString234));
+                } else {
+                    charSequence234 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, charSequence234);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F234': "+ unionIndex234));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex235 = (decoder.readIndex());
+        if (unionIndex235 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, null);
+        } else {
+            if (unionIndex235 == 1) {
+                Utf8 charSequence235;
+                Object oldString235 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(235);
+                if (oldString235 instanceof Utf8) {
+                    charSequence235 = (decoder).readString(((Utf8) oldString235));
+                } else {
+                    charSequence235 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, charSequence235);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F235': "+ unionIndex235));
+            }
+        }
+        int unionIndex236 = (decoder.readIndex());
+        if (unionIndex236 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, null);
+        } else {
+            if (unionIndex236 == 1) {
+                Utf8 charSequence236;
+                Object oldString236 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(236);
+                if (oldString236 instanceof Utf8) {
+                    charSequence236 = (decoder).readString(((Utf8) oldString236));
+                } else {
+                    charSequence236 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, charSequence236);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F236': "+ unionIndex236));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex237 = (decoder.readIndex());
+        if (unionIndex237 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, null);
+        } else {
+            if (unionIndex237 == 1) {
+                Utf8 charSequence237;
+                Object oldString237 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(237);
+                if (oldString237 instanceof Utf8) {
+                    charSequence237 = (decoder).readString(((Utf8) oldString237));
+                } else {
+                    charSequence237 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, charSequence237);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F237': "+ unionIndex237));
+            }
+        }
+        int unionIndex238 = (decoder.readIndex());
+        if (unionIndex238 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, null);
+        } else {
+            if (unionIndex238 == 1) {
+                Utf8 charSequence238;
+                Object oldString238 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(238);
+                if (oldString238 instanceof Utf8) {
+                    charSequence238 = (decoder).readString(((Utf8) oldString238));
+                } else {
+                    charSequence238 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, charSequence238);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F238': "+ unionIndex238));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex239 = (decoder.readIndex());
+        if (unionIndex239 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, null);
+        } else {
+            if (unionIndex239 == 1) {
+                Utf8 charSequence239;
+                Object oldString239 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(239);
+                if (oldString239 instanceof Utf8) {
+                    charSequence239 = (decoder).readString(((Utf8) oldString239));
+                } else {
+                    charSequence239 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, charSequence239);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F239': "+ unionIndex239));
+            }
+        }
+        int unionIndex240 = (decoder.readIndex());
+        if (unionIndex240 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, null);
+        } else {
+            if (unionIndex240 == 1) {
+                Utf8 charSequence240;
+                Object oldString240 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(240);
+                if (oldString240 instanceof Utf8) {
+                    charSequence240 = (decoder).readString(((Utf8) oldString240));
+                } else {
+                    charSequence240 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, charSequence240);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F240': "+ unionIndex240));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex241 = (decoder.readIndex());
+        if (unionIndex241 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, null);
+        } else {
+            if (unionIndex241 == 1) {
+                Utf8 charSequence241;
+                Object oldString241 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(241);
+                if (oldString241 instanceof Utf8) {
+                    charSequence241 = (decoder).readString(((Utf8) oldString241));
+                } else {
+                    charSequence241 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, charSequence241);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F241': "+ unionIndex241));
+            }
+        }
+        int unionIndex242 = (decoder.readIndex());
+        if (unionIndex242 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, null);
+        } else {
+            if (unionIndex242 == 1) {
+                Utf8 charSequence242;
+                Object oldString242 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(242);
+                if (oldString242 instanceof Utf8) {
+                    charSequence242 = (decoder).readString(((Utf8) oldString242));
+                } else {
+                    charSequence242 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, charSequence242);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F242': "+ unionIndex242));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex243 = (decoder.readIndex());
+        if (unionIndex243 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, null);
+        } else {
+            if (unionIndex243 == 1) {
+                Utf8 charSequence243;
+                Object oldString243 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(243);
+                if (oldString243 instanceof Utf8) {
+                    charSequence243 = (decoder).readString(((Utf8) oldString243));
+                } else {
+                    charSequence243 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, charSequence243);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F243': "+ unionIndex243));
+            }
+        }
+        int unionIndex244 = (decoder.readIndex());
+        if (unionIndex244 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, null);
+        } else {
+            if (unionIndex244 == 1) {
+                Utf8 charSequence244;
+                Object oldString244 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(244);
+                if (oldString244 instanceof Utf8) {
+                    charSequence244 = (decoder).readString(((Utf8) oldString244));
+                } else {
+                    charSequence244 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, charSequence244);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F244': "+ unionIndex244));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex245 = (decoder.readIndex());
+        if (unionIndex245 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, null);
+        } else {
+            if (unionIndex245 == 1) {
+                Utf8 charSequence245;
+                Object oldString245 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(245);
+                if (oldString245 instanceof Utf8) {
+                    charSequence245 = (decoder).readString(((Utf8) oldString245));
+                } else {
+                    charSequence245 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, charSequence245);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F245': "+ unionIndex245));
+            }
+        }
+        int unionIndex246 = (decoder.readIndex());
+        if (unionIndex246 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, null);
+        } else {
+            if (unionIndex246 == 1) {
+                Utf8 charSequence246;
+                Object oldString246 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(246);
+                if (oldString246 instanceof Utf8) {
+                    charSequence246 = (decoder).readString(((Utf8) oldString246));
+                } else {
+                    charSequence246 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, charSequence246);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F246': "+ unionIndex246));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex247 = (decoder.readIndex());
+        if (unionIndex247 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, null);
+        } else {
+            if (unionIndex247 == 1) {
+                Utf8 charSequence247;
+                Object oldString247 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(247);
+                if (oldString247 instanceof Utf8) {
+                    charSequence247 = (decoder).readString(((Utf8) oldString247));
+                } else {
+                    charSequence247 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, charSequence247);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F247': "+ unionIndex247));
+            }
+        }
+        int unionIndex248 = (decoder.readIndex());
+        if (unionIndex248 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, null);
+        } else {
+            if (unionIndex248 == 1) {
+                Utf8 charSequence248;
+                Object oldString248 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(248);
+                if (oldString248 instanceof Utf8) {
+                    charSequence248 = (decoder).readString(((Utf8) oldString248));
+                } else {
+                    charSequence248 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, charSequence248);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F248': "+ unionIndex248));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex249 = (decoder.readIndex());
+        if (unionIndex249 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, null);
+        } else {
+            if (unionIndex249 == 1) {
+                Utf8 charSequence249;
+                Object oldString249 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(249);
+                if (oldString249 instanceof Utf8) {
+                    charSequence249 = (decoder).readString(((Utf8) oldString249));
+                } else {
+                    charSequence249 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, charSequence249);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F249': "+ unionIndex249));
+            }
+        }
+        int unionIndex250 = (decoder.readIndex());
+        if (unionIndex250 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, null);
+        } else {
+            if (unionIndex250 == 1) {
+                Utf8 charSequence250;
+                Object oldString250 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(250);
+                if (oldString250 instanceof Utf8) {
+                    charSequence250 = (decoder).readString(((Utf8) oldString250));
+                } else {
+                    charSequence250 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, charSequence250);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F250': "+ unionIndex250));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex251 = (decoder.readIndex());
+        if (unionIndex251 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, null);
+        } else {
+            if (unionIndex251 == 1) {
+                Utf8 charSequence251;
+                Object oldString251 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(251);
+                if (oldString251 instanceof Utf8) {
+                    charSequence251 = (decoder).readString(((Utf8) oldString251));
+                } else {
+                    charSequence251 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, charSequence251);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F251': "+ unionIndex251));
+            }
+        }
+        int unionIndex252 = (decoder.readIndex());
+        if (unionIndex252 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, null);
+        } else {
+            if (unionIndex252 == 1) {
+                Utf8 charSequence252;
+                Object oldString252 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(252);
+                if (oldString252 instanceof Utf8) {
+                    charSequence252 = (decoder).readString(((Utf8) oldString252));
+                } else {
+                    charSequence252 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, charSequence252);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F252': "+ unionIndex252));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex253 = (decoder.readIndex());
+        if (unionIndex253 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, null);
+        } else {
+            if (unionIndex253 == 1) {
+                Utf8 charSequence253;
+                Object oldString253 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(253);
+                if (oldString253 instanceof Utf8) {
+                    charSequence253 = (decoder).readString(((Utf8) oldString253));
+                } else {
+                    charSequence253 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, charSequence253);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F253': "+ unionIndex253));
+            }
+        }
+        int unionIndex254 = (decoder.readIndex());
+        if (unionIndex254 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, null);
+        } else {
+            if (unionIndex254 == 1) {
+                Utf8 charSequence254;
+                Object oldString254 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(254);
+                if (oldString254 instanceof Utf8) {
+                    charSequence254 = (decoder).readString(((Utf8) oldString254));
+                } else {
+                    charSequence254 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, charSequence254);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F254': "+ unionIndex254));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex255 = (decoder.readIndex());
+        if (unionIndex255 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, null);
+        } else {
+            if (unionIndex255 == 1) {
+                Utf8 charSequence255;
+                Object oldString255 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(255);
+                if (oldString255 instanceof Utf8) {
+                    charSequence255 = (decoder).readString(((Utf8) oldString255));
+                } else {
+                    charSequence255 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, charSequence255);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F255': "+ unionIndex255));
+            }
+        }
+        int unionIndex256 = (decoder.readIndex());
+        if (unionIndex256 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, null);
+        } else {
+            if (unionIndex256 == 1) {
+                Utf8 charSequence256;
+                Object oldString256 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(256);
+                if (oldString256 instanceof Utf8) {
+                    charSequence256 = (decoder).readString(((Utf8) oldString256));
+                } else {
+                    charSequence256 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, charSequence256);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F256': "+ unionIndex256));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex257 = (decoder.readIndex());
+        if (unionIndex257 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, null);
+        } else {
+            if (unionIndex257 == 1) {
+                Utf8 charSequence257;
+                Object oldString257 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(257);
+                if (oldString257 instanceof Utf8) {
+                    charSequence257 = (decoder).readString(((Utf8) oldString257));
+                } else {
+                    charSequence257 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, charSequence257);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F257': "+ unionIndex257));
+            }
+        }
+        int unionIndex258 = (decoder.readIndex());
+        if (unionIndex258 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, null);
+        } else {
+            if (unionIndex258 == 1) {
+                Utf8 charSequence258;
+                Object oldString258 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(258);
+                if (oldString258 instanceof Utf8) {
+                    charSequence258 = (decoder).readString(((Utf8) oldString258));
+                } else {
+                    charSequence258 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, charSequence258);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F258': "+ unionIndex258));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex259 = (decoder.readIndex());
+        if (unionIndex259 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, null);
+        } else {
+            if (unionIndex259 == 1) {
+                Utf8 charSequence259;
+                Object oldString259 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(259);
+                if (oldString259 instanceof Utf8) {
+                    charSequence259 = (decoder).readString(((Utf8) oldString259));
+                } else {
+                    charSequence259 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, charSequence259);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F259': "+ unionIndex259));
+            }
+        }
+        int unionIndex260 = (decoder.readIndex());
+        if (unionIndex260 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, null);
+        } else {
+            if (unionIndex260 == 1) {
+                Utf8 charSequence260;
+                Object oldString260 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(260);
+                if (oldString260 instanceof Utf8) {
+                    charSequence260 = (decoder).readString(((Utf8) oldString260));
+                } else {
+                    charSequence260 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, charSequence260);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F260': "+ unionIndex260));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex261 = (decoder.readIndex());
+        if (unionIndex261 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, null);
+        } else {
+            if (unionIndex261 == 1) {
+                Utf8 charSequence261;
+                Object oldString261 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(261);
+                if (oldString261 instanceof Utf8) {
+                    charSequence261 = (decoder).readString(((Utf8) oldString261));
+                } else {
+                    charSequence261 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, charSequence261);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F261': "+ unionIndex261));
+            }
+        }
+        int unionIndex262 = (decoder.readIndex());
+        if (unionIndex262 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, null);
+        } else {
+            if (unionIndex262 == 1) {
+                Utf8 charSequence262;
+                Object oldString262 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(262);
+                if (oldString262 instanceof Utf8) {
+                    charSequence262 = (decoder).readString(((Utf8) oldString262));
+                } else {
+                    charSequence262 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, charSequence262);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F262': "+ unionIndex262));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex263 = (decoder.readIndex());
+        if (unionIndex263 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, null);
+        } else {
+            if (unionIndex263 == 1) {
+                Utf8 charSequence263;
+                Object oldString263 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(263);
+                if (oldString263 instanceof Utf8) {
+                    charSequence263 = (decoder).readString(((Utf8) oldString263));
+                } else {
+                    charSequence263 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, charSequence263);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F263': "+ unionIndex263));
+            }
+        }
+        int unionIndex264 = (decoder.readIndex());
+        if (unionIndex264 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, null);
+        } else {
+            if (unionIndex264 == 1) {
+                Utf8 charSequence264;
+                Object oldString264 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(264);
+                if (oldString264 instanceof Utf8) {
+                    charSequence264 = (decoder).readString(((Utf8) oldString264));
+                } else {
+                    charSequence264 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, charSequence264);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F264': "+ unionIndex264));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex265 = (decoder.readIndex());
+        if (unionIndex265 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, null);
+        } else {
+            if (unionIndex265 == 1) {
+                Utf8 charSequence265;
+                Object oldString265 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(265);
+                if (oldString265 instanceof Utf8) {
+                    charSequence265 = (decoder).readString(((Utf8) oldString265));
+                } else {
+                    charSequence265 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, charSequence265);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F265': "+ unionIndex265));
+            }
+        }
+        int unionIndex266 = (decoder.readIndex());
+        if (unionIndex266 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, null);
+        } else {
+            if (unionIndex266 == 1) {
+                Utf8 charSequence266;
+                Object oldString266 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(266);
+                if (oldString266 instanceof Utf8) {
+                    charSequence266 = (decoder).readString(((Utf8) oldString266));
+                } else {
+                    charSequence266 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, charSequence266);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F266': "+ unionIndex266));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex267 = (decoder.readIndex());
+        if (unionIndex267 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, null);
+        } else {
+            if (unionIndex267 == 1) {
+                Utf8 charSequence267;
+                Object oldString267 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(267);
+                if (oldString267 instanceof Utf8) {
+                    charSequence267 = (decoder).readString(((Utf8) oldString267));
+                } else {
+                    charSequence267 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, charSequence267);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F267': "+ unionIndex267));
+            }
+        }
+        int unionIndex268 = (decoder.readIndex());
+        if (unionIndex268 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, null);
+        } else {
+            if (unionIndex268 == 1) {
+                Utf8 charSequence268;
+                Object oldString268 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(268);
+                if (oldString268 instanceof Utf8) {
+                    charSequence268 = (decoder).readString(((Utf8) oldString268));
+                } else {
+                    charSequence268 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, charSequence268);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F268': "+ unionIndex268));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex269 = (decoder.readIndex());
+        if (unionIndex269 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, null);
+        } else {
+            if (unionIndex269 == 1) {
+                Utf8 charSequence269;
+                Object oldString269 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(269);
+                if (oldString269 instanceof Utf8) {
+                    charSequence269 = (decoder).readString(((Utf8) oldString269));
+                } else {
+                    charSequence269 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, charSequence269);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F269': "+ unionIndex269));
+            }
+        }
+        int unionIndex270 = (decoder.readIndex());
+        if (unionIndex270 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, null);
+        } else {
+            if (unionIndex270 == 1) {
+                Utf8 charSequence270;
+                Object oldString270 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(270);
+                if (oldString270 instanceof Utf8) {
+                    charSequence270 = (decoder).readString(((Utf8) oldString270));
+                } else {
+                    charSequence270 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, charSequence270);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F270': "+ unionIndex270));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex271 = (decoder.readIndex());
+        if (unionIndex271 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, null);
+        } else {
+            if (unionIndex271 == 1) {
+                Utf8 charSequence271;
+                Object oldString271 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(271);
+                if (oldString271 instanceof Utf8) {
+                    charSequence271 = (decoder).readString(((Utf8) oldString271));
+                } else {
+                    charSequence271 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, charSequence271);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F271': "+ unionIndex271));
+            }
+        }
+        int unionIndex272 = (decoder.readIndex());
+        if (unionIndex272 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, null);
+        } else {
+            if (unionIndex272 == 1) {
+                Utf8 charSequence272;
+                Object oldString272 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(272);
+                if (oldString272 instanceof Utf8) {
+                    charSequence272 = (decoder).readString(((Utf8) oldString272));
+                } else {
+                    charSequence272 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, charSequence272);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F272': "+ unionIndex272));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex273 = (decoder.readIndex());
+        if (unionIndex273 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, null);
+        } else {
+            if (unionIndex273 == 1) {
+                Utf8 charSequence273;
+                Object oldString273 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(273);
+                if (oldString273 instanceof Utf8) {
+                    charSequence273 = (decoder).readString(((Utf8) oldString273));
+                } else {
+                    charSequence273 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, charSequence273);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F273': "+ unionIndex273));
+            }
+        }
+        int unionIndex274 = (decoder.readIndex());
+        if (unionIndex274 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, null);
+        } else {
+            if (unionIndex274 == 1) {
+                Utf8 charSequence274;
+                Object oldString274 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(274);
+                if (oldString274 instanceof Utf8) {
+                    charSequence274 = (decoder).readString(((Utf8) oldString274));
+                } else {
+                    charSequence274 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, charSequence274);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F274': "+ unionIndex274));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex275 = (decoder.readIndex());
+        if (unionIndex275 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, null);
+        } else {
+            if (unionIndex275 == 1) {
+                Utf8 charSequence275;
+                Object oldString275 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(275);
+                if (oldString275 instanceof Utf8) {
+                    charSequence275 = (decoder).readString(((Utf8) oldString275));
+                } else {
+                    charSequence275 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, charSequence275);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F275': "+ unionIndex275));
+            }
+        }
+        int unionIndex276 = (decoder.readIndex());
+        if (unionIndex276 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, null);
+        } else {
+            if (unionIndex276 == 1) {
+                Utf8 charSequence276;
+                Object oldString276 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(276);
+                if (oldString276 instanceof Utf8) {
+                    charSequence276 = (decoder).readString(((Utf8) oldString276));
+                } else {
+                    charSequence276 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, charSequence276);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F276': "+ unionIndex276));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex277 = (decoder.readIndex());
+        if (unionIndex277 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, null);
+        } else {
+            if (unionIndex277 == 1) {
+                Utf8 charSequence277;
+                Object oldString277 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(277);
+                if (oldString277 instanceof Utf8) {
+                    charSequence277 = (decoder).readString(((Utf8) oldString277));
+                } else {
+                    charSequence277 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, charSequence277);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F277': "+ unionIndex277));
+            }
+        }
+        int unionIndex278 = (decoder.readIndex());
+        if (unionIndex278 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, null);
+        } else {
+            if (unionIndex278 == 1) {
+                Utf8 charSequence278;
+                Object oldString278 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(278);
+                if (oldString278 instanceof Utf8) {
+                    charSequence278 = (decoder).readString(((Utf8) oldString278));
+                } else {
+                    charSequence278 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, charSequence278);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F278': "+ unionIndex278));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex279 = (decoder.readIndex());
+        if (unionIndex279 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, null);
+        } else {
+            if (unionIndex279 == 1) {
+                Utf8 charSequence279;
+                Object oldString279 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(279);
+                if (oldString279 instanceof Utf8) {
+                    charSequence279 = (decoder).readString(((Utf8) oldString279));
+                } else {
+                    charSequence279 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, charSequence279);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F279': "+ unionIndex279));
+            }
+        }
+        int unionIndex280 = (decoder.readIndex());
+        if (unionIndex280 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, null);
+        } else {
+            if (unionIndex280 == 1) {
+                Utf8 charSequence280;
+                Object oldString280 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(280);
+                if (oldString280 instanceof Utf8) {
+                    charSequence280 = (decoder).readString(((Utf8) oldString280));
+                } else {
+                    charSequence280 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, charSequence280);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F280': "+ unionIndex280));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex281 = (decoder.readIndex());
+        if (unionIndex281 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, null);
+        } else {
+            if (unionIndex281 == 1) {
+                Utf8 charSequence281;
+                Object oldString281 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(281);
+                if (oldString281 instanceof Utf8) {
+                    charSequence281 = (decoder).readString(((Utf8) oldString281));
+                } else {
+                    charSequence281 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, charSequence281);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F281': "+ unionIndex281));
+            }
+        }
+        int unionIndex282 = (decoder.readIndex());
+        if (unionIndex282 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, null);
+        } else {
+            if (unionIndex282 == 1) {
+                Utf8 charSequence282;
+                Object oldString282 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(282);
+                if (oldString282 instanceof Utf8) {
+                    charSequence282 = (decoder).readString(((Utf8) oldString282));
+                } else {
+                    charSequence282 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, charSequence282);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F282': "+ unionIndex282));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex283 = (decoder.readIndex());
+        if (unionIndex283 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, null);
+        } else {
+            if (unionIndex283 == 1) {
+                Utf8 charSequence283;
+                Object oldString283 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(283);
+                if (oldString283 instanceof Utf8) {
+                    charSequence283 = (decoder).readString(((Utf8) oldString283));
+                } else {
+                    charSequence283 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, charSequence283);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F283': "+ unionIndex283));
+            }
+        }
+        int unionIndex284 = (decoder.readIndex());
+        if (unionIndex284 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, null);
+        } else {
+            if (unionIndex284 == 1) {
+                Utf8 charSequence284;
+                Object oldString284 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(284);
+                if (oldString284 instanceof Utf8) {
+                    charSequence284 = (decoder).readString(((Utf8) oldString284));
+                } else {
+                    charSequence284 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, charSequence284);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F284': "+ unionIndex284));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex285 = (decoder.readIndex());
+        if (unionIndex285 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, null);
+        } else {
+            if (unionIndex285 == 1) {
+                Utf8 charSequence285;
+                Object oldString285 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(285);
+                if (oldString285 instanceof Utf8) {
+                    charSequence285 = (decoder).readString(((Utf8) oldString285));
+                } else {
+                    charSequence285 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, charSequence285);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F285': "+ unionIndex285));
+            }
+        }
+        int unionIndex286 = (decoder.readIndex());
+        if (unionIndex286 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, null);
+        } else {
+            if (unionIndex286 == 1) {
+                Utf8 charSequence286;
+                Object oldString286 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(286);
+                if (oldString286 instanceof Utf8) {
+                    charSequence286 = (decoder).readString(((Utf8) oldString286));
+                } else {
+                    charSequence286 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, charSequence286);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F286': "+ unionIndex286));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex287 = (decoder.readIndex());
+        if (unionIndex287 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, null);
+        } else {
+            if (unionIndex287 == 1) {
+                Utf8 charSequence287;
+                Object oldString287 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(287);
+                if (oldString287 instanceof Utf8) {
+                    charSequence287 = (decoder).readString(((Utf8) oldString287));
+                } else {
+                    charSequence287 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, charSequence287);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F287': "+ unionIndex287));
+            }
+        }
+        int unionIndex288 = (decoder.readIndex());
+        if (unionIndex288 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, null);
+        } else {
+            if (unionIndex288 == 1) {
+                Utf8 charSequence288;
+                Object oldString288 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(288);
+                if (oldString288 instanceof Utf8) {
+                    charSequence288 = (decoder).readString(((Utf8) oldString288));
+                } else {
+                    charSequence288 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, charSequence288);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F288': "+ unionIndex288));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex289 = (decoder.readIndex());
+        if (unionIndex289 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, null);
+        } else {
+            if (unionIndex289 == 1) {
+                Utf8 charSequence289;
+                Object oldString289 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(289);
+                if (oldString289 instanceof Utf8) {
+                    charSequence289 = (decoder).readString(((Utf8) oldString289));
+                } else {
+                    charSequence289 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, charSequence289);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F289': "+ unionIndex289));
+            }
+        }
+        int unionIndex290 = (decoder.readIndex());
+        if (unionIndex290 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, null);
+        } else {
+            if (unionIndex290 == 1) {
+                Utf8 charSequence290;
+                Object oldString290 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(290);
+                if (oldString290 instanceof Utf8) {
+                    charSequence290 = (decoder).readString(((Utf8) oldString290));
+                } else {
+                    charSequence290 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, charSequence290);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F290': "+ unionIndex290));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex291 = (decoder.readIndex());
+        if (unionIndex291 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, null);
+        } else {
+            if (unionIndex291 == 1) {
+                Utf8 charSequence291;
+                Object oldString291 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(291);
+                if (oldString291 instanceof Utf8) {
+                    charSequence291 = (decoder).readString(((Utf8) oldString291));
+                } else {
+                    charSequence291 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, charSequence291);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F291': "+ unionIndex291));
+            }
+        }
+        int unionIndex292 = (decoder.readIndex());
+        if (unionIndex292 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, null);
+        } else {
+            if (unionIndex292 == 1) {
+                Utf8 charSequence292;
+                Object oldString292 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(292);
+                if (oldString292 instanceof Utf8) {
+                    charSequence292 = (decoder).readString(((Utf8) oldString292));
+                } else {
+                    charSequence292 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, charSequence292);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F292': "+ unionIndex292));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex293 = (decoder.readIndex());
+        if (unionIndex293 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, null);
+        } else {
+            if (unionIndex293 == 1) {
+                Utf8 charSequence293;
+                Object oldString293 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(293);
+                if (oldString293 instanceof Utf8) {
+                    charSequence293 = (decoder).readString(((Utf8) oldString293));
+                } else {
+                    charSequence293 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, charSequence293);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F293': "+ unionIndex293));
+            }
+        }
+        int unionIndex294 = (decoder.readIndex());
+        if (unionIndex294 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, null);
+        } else {
+            if (unionIndex294 == 1) {
+                Utf8 charSequence294;
+                Object oldString294 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(294);
+                if (oldString294 instanceof Utf8) {
+                    charSequence294 = (decoder).readString(((Utf8) oldString294));
+                } else {
+                    charSequence294 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, charSequence294);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F294': "+ unionIndex294));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex295 = (decoder.readIndex());
+        if (unionIndex295 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, null);
+        } else {
+            if (unionIndex295 == 1) {
+                Utf8 charSequence295;
+                Object oldString295 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(295);
+                if (oldString295 instanceof Utf8) {
+                    charSequence295 = (decoder).readString(((Utf8) oldString295));
+                } else {
+                    charSequence295 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, charSequence295);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F295': "+ unionIndex295));
+            }
+        }
+        int unionIndex296 = (decoder.readIndex());
+        if (unionIndex296 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, null);
+        } else {
+            if (unionIndex296 == 1) {
+                Utf8 charSequence296;
+                Object oldString296 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(296);
+                if (oldString296 instanceof Utf8) {
+                    charSequence296 = (decoder).readString(((Utf8) oldString296));
+                } else {
+                    charSequence296 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, charSequence296);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F296': "+ unionIndex296));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex297 = (decoder.readIndex());
+        if (unionIndex297 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, null);
+        } else {
+            if (unionIndex297 == 1) {
+                Utf8 charSequence297;
+                Object oldString297 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(297);
+                if (oldString297 instanceof Utf8) {
+                    charSequence297 = (decoder).readString(((Utf8) oldString297));
+                } else {
+                    charSequence297 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, charSequence297);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F297': "+ unionIndex297));
+            }
+        }
+        int unionIndex298 = (decoder.readIndex());
+        if (unionIndex298 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, null);
+        } else {
+            if (unionIndex298 == 1) {
+                Utf8 charSequence298;
+                Object oldString298 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(298);
+                if (oldString298 instanceof Utf8) {
+                    charSequence298 = (decoder).readString(((Utf8) oldString298));
+                } else {
+                    charSequence298 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, charSequence298);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F298': "+ unionIndex298));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex299 = (decoder.readIndex());
+        if (unionIndex299 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, null);
+        } else {
+            if (unionIndex299 == 1) {
+                Utf8 charSequence299;
+                Object oldString299 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(299);
+                if (oldString299 instanceof Utf8) {
+                    charSequence299 = (decoder).readString(((Utf8) oldString299));
+                } else {
+                    charSequence299 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, charSequence299);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F299': "+ unionIndex299));
+            }
+        }
+        int unionIndex300 = (decoder.readIndex());
+        if (unionIndex300 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, null);
+        } else {
+            if (unionIndex300 == 1) {
+                Utf8 charSequence300;
+                Object oldString300 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(300);
+                if (oldString300 instanceof Utf8) {
+                    charSequence300 = (decoder).readString(((Utf8) oldString300));
+                } else {
+                    charSequence300 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, charSequence300);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F300': "+ unionIndex300));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex301 = (decoder.readIndex());
+        if (unionIndex301 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, null);
+        } else {
+            if (unionIndex301 == 1) {
+                Utf8 charSequence301;
+                Object oldString301 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(301);
+                if (oldString301 instanceof Utf8) {
+                    charSequence301 = (decoder).readString(((Utf8) oldString301));
+                } else {
+                    charSequence301 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, charSequence301);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F301': "+ unionIndex301));
+            }
+        }
+        int unionIndex302 = (decoder.readIndex());
+        if (unionIndex302 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, null);
+        } else {
+            if (unionIndex302 == 1) {
+                Utf8 charSequence302;
+                Object oldString302 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(302);
+                if (oldString302 instanceof Utf8) {
+                    charSequence302 = (decoder).readString(((Utf8) oldString302));
+                } else {
+                    charSequence302 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, charSequence302);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F302': "+ unionIndex302));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex303 = (decoder.readIndex());
+        if (unionIndex303 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, null);
+        } else {
+            if (unionIndex303 == 1) {
+                Utf8 charSequence303;
+                Object oldString303 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(303);
+                if (oldString303 instanceof Utf8) {
+                    charSequence303 = (decoder).readString(((Utf8) oldString303));
+                } else {
+                    charSequence303 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, charSequence303);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F303': "+ unionIndex303));
+            }
+        }
+        int unionIndex304 = (decoder.readIndex());
+        if (unionIndex304 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, null);
+        } else {
+            if (unionIndex304 == 1) {
+                Utf8 charSequence304;
+                Object oldString304 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(304);
+                if (oldString304 instanceof Utf8) {
+                    charSequence304 = (decoder).readString(((Utf8) oldString304));
+                } else {
+                    charSequence304 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, charSequence304);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F304': "+ unionIndex304));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex305 = (decoder.readIndex());
+        if (unionIndex305 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, null);
+        } else {
+            if (unionIndex305 == 1) {
+                Utf8 charSequence305;
+                Object oldString305 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(305);
+                if (oldString305 instanceof Utf8) {
+                    charSequence305 = (decoder).readString(((Utf8) oldString305));
+                } else {
+                    charSequence305 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, charSequence305);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F305': "+ unionIndex305));
+            }
+        }
+        int unionIndex306 = (decoder.readIndex());
+        if (unionIndex306 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, null);
+        } else {
+            if (unionIndex306 == 1) {
+                Utf8 charSequence306;
+                Object oldString306 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(306);
+                if (oldString306 instanceof Utf8) {
+                    charSequence306 = (decoder).readString(((Utf8) oldString306));
+                } else {
+                    charSequence306 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, charSequence306);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F306': "+ unionIndex306));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex307 = (decoder.readIndex());
+        if (unionIndex307 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, null);
+        } else {
+            if (unionIndex307 == 1) {
+                Utf8 charSequence307;
+                Object oldString307 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(307);
+                if (oldString307 instanceof Utf8) {
+                    charSequence307 = (decoder).readString(((Utf8) oldString307));
+                } else {
+                    charSequence307 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, charSequence307);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F307': "+ unionIndex307));
+            }
+        }
+        int unionIndex308 = (decoder.readIndex());
+        if (unionIndex308 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, null);
+        } else {
+            if (unionIndex308 == 1) {
+                Utf8 charSequence308;
+                Object oldString308 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(308);
+                if (oldString308 instanceof Utf8) {
+                    charSequence308 = (decoder).readString(((Utf8) oldString308));
+                } else {
+                    charSequence308 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, charSequence308);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F308': "+ unionIndex308));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex309 = (decoder.readIndex());
+        if (unionIndex309 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, null);
+        } else {
+            if (unionIndex309 == 1) {
+                Utf8 charSequence309;
+                Object oldString309 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(309);
+                if (oldString309 instanceof Utf8) {
+                    charSequence309 = (decoder).readString(((Utf8) oldString309));
+                } else {
+                    charSequence309 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, charSequence309);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F309': "+ unionIndex309));
+            }
+        }
+        int unionIndex310 = (decoder.readIndex());
+        if (unionIndex310 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, null);
+        } else {
+            if (unionIndex310 == 1) {
+                Utf8 charSequence310;
+                Object oldString310 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(310);
+                if (oldString310 instanceof Utf8) {
+                    charSequence310 = (decoder).readString(((Utf8) oldString310));
+                } else {
+                    charSequence310 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, charSequence310);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F310': "+ unionIndex310));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex311 = (decoder.readIndex());
+        if (unionIndex311 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, null);
+        } else {
+            if (unionIndex311 == 1) {
+                Utf8 charSequence311;
+                Object oldString311 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(311);
+                if (oldString311 instanceof Utf8) {
+                    charSequence311 = (decoder).readString(((Utf8) oldString311));
+                } else {
+                    charSequence311 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, charSequence311);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F311': "+ unionIndex311));
+            }
+        }
+        int unionIndex312 = (decoder.readIndex());
+        if (unionIndex312 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, null);
+        } else {
+            if (unionIndex312 == 1) {
+                Utf8 charSequence312;
+                Object oldString312 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(312);
+                if (oldString312 instanceof Utf8) {
+                    charSequence312 = (decoder).readString(((Utf8) oldString312));
+                } else {
+                    charSequence312 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, charSequence312);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F312': "+ unionIndex312));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex313 = (decoder.readIndex());
+        if (unionIndex313 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, null);
+        } else {
+            if (unionIndex313 == 1) {
+                Utf8 charSequence313;
+                Object oldString313 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(313);
+                if (oldString313 instanceof Utf8) {
+                    charSequence313 = (decoder).readString(((Utf8) oldString313));
+                } else {
+                    charSequence313 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, charSequence313);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F313': "+ unionIndex313));
+            }
+        }
+        int unionIndex314 = (decoder.readIndex());
+        if (unionIndex314 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, null);
+        } else {
+            if (unionIndex314 == 1) {
+                Utf8 charSequence314;
+                Object oldString314 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(314);
+                if (oldString314 instanceof Utf8) {
+                    charSequence314 = (decoder).readString(((Utf8) oldString314));
+                } else {
+                    charSequence314 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, charSequence314);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F314': "+ unionIndex314));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex315 = (decoder.readIndex());
+        if (unionIndex315 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, null);
+        } else {
+            if (unionIndex315 == 1) {
+                Utf8 charSequence315;
+                Object oldString315 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(315);
+                if (oldString315 instanceof Utf8) {
+                    charSequence315 = (decoder).readString(((Utf8) oldString315));
+                } else {
+                    charSequence315 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, charSequence315);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F315': "+ unionIndex315));
+            }
+        }
+        int unionIndex316 = (decoder.readIndex());
+        if (unionIndex316 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, null);
+        } else {
+            if (unionIndex316 == 1) {
+                Utf8 charSequence316;
+                Object oldString316 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(316);
+                if (oldString316 instanceof Utf8) {
+                    charSequence316 = (decoder).readString(((Utf8) oldString316));
+                } else {
+                    charSequence316 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, charSequence316);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F316': "+ unionIndex316));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex317 = (decoder.readIndex());
+        if (unionIndex317 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, null);
+        } else {
+            if (unionIndex317 == 1) {
+                Utf8 charSequence317;
+                Object oldString317 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(317);
+                if (oldString317 instanceof Utf8) {
+                    charSequence317 = (decoder).readString(((Utf8) oldString317));
+                } else {
+                    charSequence317 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, charSequence317);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F317': "+ unionIndex317));
+            }
+        }
+        int unionIndex318 = (decoder.readIndex());
+        if (unionIndex318 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, null);
+        } else {
+            if (unionIndex318 == 1) {
+                Utf8 charSequence318;
+                Object oldString318 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(318);
+                if (oldString318 instanceof Utf8) {
+                    charSequence318 = (decoder).readString(((Utf8) oldString318));
+                } else {
+                    charSequence318 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, charSequence318);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F318': "+ unionIndex318));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex319 = (decoder.readIndex());
+        if (unionIndex319 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, null);
+        } else {
+            if (unionIndex319 == 1) {
+                Utf8 charSequence319;
+                Object oldString319 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(319);
+                if (oldString319 instanceof Utf8) {
+                    charSequence319 = (decoder).readString(((Utf8) oldString319));
+                } else {
+                    charSequence319 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, charSequence319);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F319': "+ unionIndex319));
+            }
+        }
+        int unionIndex320 = (decoder.readIndex());
+        if (unionIndex320 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, null);
+        } else {
+            if (unionIndex320 == 1) {
+                Utf8 charSequence320;
+                Object oldString320 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(320);
+                if (oldString320 instanceof Utf8) {
+                    charSequence320 = (decoder).readString(((Utf8) oldString320));
+                } else {
+                    charSequence320 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, charSequence320);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F320': "+ unionIndex320));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex321 = (decoder.readIndex());
+        if (unionIndex321 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, null);
+        } else {
+            if (unionIndex321 == 1) {
+                Utf8 charSequence321;
+                Object oldString321 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(321);
+                if (oldString321 instanceof Utf8) {
+                    charSequence321 = (decoder).readString(((Utf8) oldString321));
+                } else {
+                    charSequence321 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, charSequence321);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F321': "+ unionIndex321));
+            }
+        }
+        int unionIndex322 = (decoder.readIndex());
+        if (unionIndex322 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, null);
+        } else {
+            if (unionIndex322 == 1) {
+                Utf8 charSequence322;
+                Object oldString322 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(322);
+                if (oldString322 instanceof Utf8) {
+                    charSequence322 = (decoder).readString(((Utf8) oldString322));
+                } else {
+                    charSequence322 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, charSequence322);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F322': "+ unionIndex322));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex323 = (decoder.readIndex());
+        if (unionIndex323 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, null);
+        } else {
+            if (unionIndex323 == 1) {
+                Utf8 charSequence323;
+                Object oldString323 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(323);
+                if (oldString323 instanceof Utf8) {
+                    charSequence323 = (decoder).readString(((Utf8) oldString323));
+                } else {
+                    charSequence323 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, charSequence323);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F323': "+ unionIndex323));
+            }
+        }
+        int unionIndex324 = (decoder.readIndex());
+        if (unionIndex324 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, null);
+        } else {
+            if (unionIndex324 == 1) {
+                Utf8 charSequence324;
+                Object oldString324 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(324);
+                if (oldString324 instanceof Utf8) {
+                    charSequence324 = (decoder).readString(((Utf8) oldString324));
+                } else {
+                    charSequence324 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, charSequence324);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F324': "+ unionIndex324));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex325 = (decoder.readIndex());
+        if (unionIndex325 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, null);
+        } else {
+            if (unionIndex325 == 1) {
+                Utf8 charSequence325;
+                Object oldString325 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(325);
+                if (oldString325 instanceof Utf8) {
+                    charSequence325 = (decoder).readString(((Utf8) oldString325));
+                } else {
+                    charSequence325 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, charSequence325);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F325': "+ unionIndex325));
+            }
+        }
+        int unionIndex326 = (decoder.readIndex());
+        if (unionIndex326 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, null);
+        } else {
+            if (unionIndex326 == 1) {
+                Utf8 charSequence326;
+                Object oldString326 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(326);
+                if (oldString326 instanceof Utf8) {
+                    charSequence326 = (decoder).readString(((Utf8) oldString326));
+                } else {
+                    charSequence326 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, charSequence326);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F326': "+ unionIndex326));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex327 = (decoder.readIndex());
+        if (unionIndex327 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, null);
+        } else {
+            if (unionIndex327 == 1) {
+                Utf8 charSequence327;
+                Object oldString327 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(327);
+                if (oldString327 instanceof Utf8) {
+                    charSequence327 = (decoder).readString(((Utf8) oldString327));
+                } else {
+                    charSequence327 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, charSequence327);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F327': "+ unionIndex327));
+            }
+        }
+        int unionIndex328 = (decoder.readIndex());
+        if (unionIndex328 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, null);
+        } else {
+            if (unionIndex328 == 1) {
+                Utf8 charSequence328;
+                Object oldString328 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(328);
+                if (oldString328 instanceof Utf8) {
+                    charSequence328 = (decoder).readString(((Utf8) oldString328));
+                } else {
+                    charSequence328 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, charSequence328);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F328': "+ unionIndex328));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex329 = (decoder.readIndex());
+        if (unionIndex329 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, null);
+        } else {
+            if (unionIndex329 == 1) {
+                Utf8 charSequence329;
+                Object oldString329 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(329);
+                if (oldString329 instanceof Utf8) {
+                    charSequence329 = (decoder).readString(((Utf8) oldString329));
+                } else {
+                    charSequence329 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, charSequence329);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F329': "+ unionIndex329));
+            }
+        }
+        int unionIndex330 = (decoder.readIndex());
+        if (unionIndex330 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, null);
+        } else {
+            if (unionIndex330 == 1) {
+                Utf8 charSequence330;
+                Object oldString330 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(330);
+                if (oldString330 instanceof Utf8) {
+                    charSequence330 = (decoder).readString(((Utf8) oldString330));
+                } else {
+                    charSequence330 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, charSequence330);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F330': "+ unionIndex330));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex331 = (decoder.readIndex());
+        if (unionIndex331 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, null);
+        } else {
+            if (unionIndex331 == 1) {
+                Utf8 charSequence331;
+                Object oldString331 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(331);
+                if (oldString331 instanceof Utf8) {
+                    charSequence331 = (decoder).readString(((Utf8) oldString331));
+                } else {
+                    charSequence331 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, charSequence331);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F331': "+ unionIndex331));
+            }
+        }
+        int unionIndex332 = (decoder.readIndex());
+        if (unionIndex332 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, null);
+        } else {
+            if (unionIndex332 == 1) {
+                Utf8 charSequence332;
+                Object oldString332 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(332);
+                if (oldString332 instanceof Utf8) {
+                    charSequence332 = (decoder).readString(((Utf8) oldString332));
+                } else {
+                    charSequence332 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, charSequence332);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F332': "+ unionIndex332));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex333 = (decoder.readIndex());
+        if (unionIndex333 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, null);
+        } else {
+            if (unionIndex333 == 1) {
+                Utf8 charSequence333;
+                Object oldString333 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(333);
+                if (oldString333 instanceof Utf8) {
+                    charSequence333 = (decoder).readString(((Utf8) oldString333));
+                } else {
+                    charSequence333 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, charSequence333);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F333': "+ unionIndex333));
+            }
+        }
+        int unionIndex334 = (decoder.readIndex());
+        if (unionIndex334 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, null);
+        } else {
+            if (unionIndex334 == 1) {
+                Utf8 charSequence334;
+                Object oldString334 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(334);
+                if (oldString334 instanceof Utf8) {
+                    charSequence334 = (decoder).readString(((Utf8) oldString334));
+                } else {
+                    charSequence334 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, charSequence334);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F334': "+ unionIndex334));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex335 = (decoder.readIndex());
+        if (unionIndex335 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, null);
+        } else {
+            if (unionIndex335 == 1) {
+                Utf8 charSequence335;
+                Object oldString335 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(335);
+                if (oldString335 instanceof Utf8) {
+                    charSequence335 = (decoder).readString(((Utf8) oldString335));
+                } else {
+                    charSequence335 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, charSequence335);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F335': "+ unionIndex335));
+            }
+        }
+        int unionIndex336 = (decoder.readIndex());
+        if (unionIndex336 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, null);
+        } else {
+            if (unionIndex336 == 1) {
+                Utf8 charSequence336;
+                Object oldString336 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(336);
+                if (oldString336 instanceof Utf8) {
+                    charSequence336 = (decoder).readString(((Utf8) oldString336));
+                } else {
+                    charSequence336 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, charSequence336);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F336': "+ unionIndex336));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex337 = (decoder.readIndex());
+        if (unionIndex337 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, null);
+        } else {
+            if (unionIndex337 == 1) {
+                Utf8 charSequence337;
+                Object oldString337 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(337);
+                if (oldString337 instanceof Utf8) {
+                    charSequence337 = (decoder).readString(((Utf8) oldString337));
+                } else {
+                    charSequence337 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, charSequence337);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F337': "+ unionIndex337));
+            }
+        }
+        int unionIndex338 = (decoder.readIndex());
+        if (unionIndex338 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, null);
+        } else {
+            if (unionIndex338 == 1) {
+                Utf8 charSequence338;
+                Object oldString338 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(338);
+                if (oldString338 instanceof Utf8) {
+                    charSequence338 = (decoder).readString(((Utf8) oldString338));
+                } else {
+                    charSequence338 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, charSequence338);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F338': "+ unionIndex338));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex339 = (decoder.readIndex());
+        if (unionIndex339 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, null);
+        } else {
+            if (unionIndex339 == 1) {
+                Utf8 charSequence339;
+                Object oldString339 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(339);
+                if (oldString339 instanceof Utf8) {
+                    charSequence339 = (decoder).readString(((Utf8) oldString339));
+                } else {
+                    charSequence339 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, charSequence339);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F339': "+ unionIndex339));
+            }
+        }
+        int unionIndex340 = (decoder.readIndex());
+        if (unionIndex340 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, null);
+        } else {
+            if (unionIndex340 == 1) {
+                Utf8 charSequence340;
+                Object oldString340 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(340);
+                if (oldString340 instanceof Utf8) {
+                    charSequence340 = (decoder).readString(((Utf8) oldString340));
+                } else {
+                    charSequence340 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, charSequence340);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F340': "+ unionIndex340));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex341 = (decoder.readIndex());
+        if (unionIndex341 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, null);
+        } else {
+            if (unionIndex341 == 1) {
+                Utf8 charSequence341;
+                Object oldString341 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(341);
+                if (oldString341 instanceof Utf8) {
+                    charSequence341 = (decoder).readString(((Utf8) oldString341));
+                } else {
+                    charSequence341 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, charSequence341);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F341': "+ unionIndex341));
+            }
+        }
+        int unionIndex342 = (decoder.readIndex());
+        if (unionIndex342 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, null);
+        } else {
+            if (unionIndex342 == 1) {
+                Utf8 charSequence342;
+                Object oldString342 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(342);
+                if (oldString342 instanceof Utf8) {
+                    charSequence342 = (decoder).readString(((Utf8) oldString342));
+                } else {
+                    charSequence342 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, charSequence342);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F342': "+ unionIndex342));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex343 = (decoder.readIndex());
+        if (unionIndex343 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, null);
+        } else {
+            if (unionIndex343 == 1) {
+                Utf8 charSequence343;
+                Object oldString343 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(343);
+                if (oldString343 instanceof Utf8) {
+                    charSequence343 = (decoder).readString(((Utf8) oldString343));
+                } else {
+                    charSequence343 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, charSequence343);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F343': "+ unionIndex343));
+            }
+        }
+        int unionIndex344 = (decoder.readIndex());
+        if (unionIndex344 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, null);
+        } else {
+            if (unionIndex344 == 1) {
+                Utf8 charSequence344;
+                Object oldString344 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(344);
+                if (oldString344 instanceof Utf8) {
+                    charSequence344 = (decoder).readString(((Utf8) oldString344));
+                } else {
+                    charSequence344 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, charSequence344);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F344': "+ unionIndex344));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex345 = (decoder.readIndex());
+        if (unionIndex345 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, null);
+        } else {
+            if (unionIndex345 == 1) {
+                Utf8 charSequence345;
+                Object oldString345 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(345);
+                if (oldString345 instanceof Utf8) {
+                    charSequence345 = (decoder).readString(((Utf8) oldString345));
+                } else {
+                    charSequence345 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, charSequence345);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F345': "+ unionIndex345));
+            }
+        }
+        int unionIndex346 = (decoder.readIndex());
+        if (unionIndex346 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, null);
+        } else {
+            if (unionIndex346 == 1) {
+                Utf8 charSequence346;
+                Object oldString346 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(346);
+                if (oldString346 instanceof Utf8) {
+                    charSequence346 = (decoder).readString(((Utf8) oldString346));
+                } else {
+                    charSequence346 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, charSequence346);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F346': "+ unionIndex346));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex347 = (decoder.readIndex());
+        if (unionIndex347 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, null);
+        } else {
+            if (unionIndex347 == 1) {
+                Utf8 charSequence347;
+                Object oldString347 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(347);
+                if (oldString347 instanceof Utf8) {
+                    charSequence347 = (decoder).readString(((Utf8) oldString347));
+                } else {
+                    charSequence347 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, charSequence347);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F347': "+ unionIndex347));
+            }
+        }
+        int unionIndex348 = (decoder.readIndex());
+        if (unionIndex348 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, null);
+        } else {
+            if (unionIndex348 == 1) {
+                Utf8 charSequence348;
+                Object oldString348 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(348);
+                if (oldString348 instanceof Utf8) {
+                    charSequence348 = (decoder).readString(((Utf8) oldString348));
+                } else {
+                    charSequence348 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, charSequence348);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F348': "+ unionIndex348));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex349 = (decoder.readIndex());
+        if (unionIndex349 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, null);
+        } else {
+            if (unionIndex349 == 1) {
+                Utf8 charSequence349;
+                Object oldString349 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(349);
+                if (oldString349 instanceof Utf8) {
+                    charSequence349 = (decoder).readString(((Utf8) oldString349));
+                } else {
+                    charSequence349 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, charSequence349);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F349': "+ unionIndex349));
+            }
+        }
+        int unionIndex350 = (decoder.readIndex());
+        if (unionIndex350 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, null);
+        } else {
+            if (unionIndex350 == 1) {
+                Utf8 charSequence350;
+                Object oldString350 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(350);
+                if (oldString350 instanceof Utf8) {
+                    charSequence350 = (decoder).readString(((Utf8) oldString350));
+                } else {
+                    charSequence350 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, charSequence350);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F350': "+ unionIndex350));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex351 = (decoder.readIndex());
+        if (unionIndex351 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, null);
+        } else {
+            if (unionIndex351 == 1) {
+                Utf8 charSequence351;
+                Object oldString351 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(351);
+                if (oldString351 instanceof Utf8) {
+                    charSequence351 = (decoder).readString(((Utf8) oldString351));
+                } else {
+                    charSequence351 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, charSequence351);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F351': "+ unionIndex351));
+            }
+        }
+        int unionIndex352 = (decoder.readIndex());
+        if (unionIndex352 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, null);
+        } else {
+            if (unionIndex352 == 1) {
+                Utf8 charSequence352;
+                Object oldString352 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(352);
+                if (oldString352 instanceof Utf8) {
+                    charSequence352 = (decoder).readString(((Utf8) oldString352));
+                } else {
+                    charSequence352 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, charSequence352);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F352': "+ unionIndex352));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex353 = (decoder.readIndex());
+        if (unionIndex353 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, null);
+        } else {
+            if (unionIndex353 == 1) {
+                Utf8 charSequence353;
+                Object oldString353 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(353);
+                if (oldString353 instanceof Utf8) {
+                    charSequence353 = (decoder).readString(((Utf8) oldString353));
+                } else {
+                    charSequence353 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, charSequence353);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F353': "+ unionIndex353));
+            }
+        }
+        int unionIndex354 = (decoder.readIndex());
+        if (unionIndex354 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, null);
+        } else {
+            if (unionIndex354 == 1) {
+                Utf8 charSequence354;
+                Object oldString354 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(354);
+                if (oldString354 instanceof Utf8) {
+                    charSequence354 = (decoder).readString(((Utf8) oldString354));
+                } else {
+                    charSequence354 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, charSequence354);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F354': "+ unionIndex354));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex355 = (decoder.readIndex());
+        if (unionIndex355 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, null);
+        } else {
+            if (unionIndex355 == 1) {
+                Utf8 charSequence355;
+                Object oldString355 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(355);
+                if (oldString355 instanceof Utf8) {
+                    charSequence355 = (decoder).readString(((Utf8) oldString355));
+                } else {
+                    charSequence355 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, charSequence355);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F355': "+ unionIndex355));
+            }
+        }
+        int unionIndex356 = (decoder.readIndex());
+        if (unionIndex356 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, null);
+        } else {
+            if (unionIndex356 == 1) {
+                Utf8 charSequence356;
+                Object oldString356 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(356);
+                if (oldString356 instanceof Utf8) {
+                    charSequence356 = (decoder).readString(((Utf8) oldString356));
+                } else {
+                    charSequence356 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, charSequence356);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F356': "+ unionIndex356));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex357 = (decoder.readIndex());
+        if (unionIndex357 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, null);
+        } else {
+            if (unionIndex357 == 1) {
+                Utf8 charSequence357;
+                Object oldString357 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(357);
+                if (oldString357 instanceof Utf8) {
+                    charSequence357 = (decoder).readString(((Utf8) oldString357));
+                } else {
+                    charSequence357 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, charSequence357);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F357': "+ unionIndex357));
+            }
+        }
+        int unionIndex358 = (decoder.readIndex());
+        if (unionIndex358 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, null);
+        } else {
+            if (unionIndex358 == 1) {
+                Utf8 charSequence358;
+                Object oldString358 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(358);
+                if (oldString358 instanceof Utf8) {
+                    charSequence358 = (decoder).readString(((Utf8) oldString358));
+                } else {
+                    charSequence358 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, charSequence358);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F358': "+ unionIndex358));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex359 = (decoder.readIndex());
+        if (unionIndex359 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, null);
+        } else {
+            if (unionIndex359 == 1) {
+                Utf8 charSequence359;
+                Object oldString359 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(359);
+                if (oldString359 instanceof Utf8) {
+                    charSequence359 = (decoder).readString(((Utf8) oldString359));
+                } else {
+                    charSequence359 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, charSequence359);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F359': "+ unionIndex359));
+            }
+        }
+        int unionIndex360 = (decoder.readIndex());
+        if (unionIndex360 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, null);
+        } else {
+            if (unionIndex360 == 1) {
+                Utf8 charSequence360;
+                Object oldString360 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(360);
+                if (oldString360 instanceof Utf8) {
+                    charSequence360 = (decoder).readString(((Utf8) oldString360));
+                } else {
+                    charSequence360 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, charSequence360);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F360': "+ unionIndex360));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex361 = (decoder.readIndex());
+        if (unionIndex361 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, null);
+        } else {
+            if (unionIndex361 == 1) {
+                Utf8 charSequence361;
+                Object oldString361 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(361);
+                if (oldString361 instanceof Utf8) {
+                    charSequence361 = (decoder).readString(((Utf8) oldString361));
+                } else {
+                    charSequence361 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, charSequence361);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F361': "+ unionIndex361));
+            }
+        }
+        int unionIndex362 = (decoder.readIndex());
+        if (unionIndex362 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, null);
+        } else {
+            if (unionIndex362 == 1) {
+                Utf8 charSequence362;
+                Object oldString362 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(362);
+                if (oldString362 instanceof Utf8) {
+                    charSequence362 = (decoder).readString(((Utf8) oldString362));
+                } else {
+                    charSequence362 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, charSequence362);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F362': "+ unionIndex362));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex363 = (decoder.readIndex());
+        if (unionIndex363 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, null);
+        } else {
+            if (unionIndex363 == 1) {
+                Utf8 charSequence363;
+                Object oldString363 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(363);
+                if (oldString363 instanceof Utf8) {
+                    charSequence363 = (decoder).readString(((Utf8) oldString363));
+                } else {
+                    charSequence363 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, charSequence363);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F363': "+ unionIndex363));
+            }
+        }
+        int unionIndex364 = (decoder.readIndex());
+        if (unionIndex364 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, null);
+        } else {
+            if (unionIndex364 == 1) {
+                Utf8 charSequence364;
+                Object oldString364 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(364);
+                if (oldString364 instanceof Utf8) {
+                    charSequence364 = (decoder).readString(((Utf8) oldString364));
+                } else {
+                    charSequence364 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, charSequence364);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F364': "+ unionIndex364));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex365 = (decoder.readIndex());
+        if (unionIndex365 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, null);
+        } else {
+            if (unionIndex365 == 1) {
+                Utf8 charSequence365;
+                Object oldString365 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(365);
+                if (oldString365 instanceof Utf8) {
+                    charSequence365 = (decoder).readString(((Utf8) oldString365));
+                } else {
+                    charSequence365 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, charSequence365);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F365': "+ unionIndex365));
+            }
+        }
+        int unionIndex366 = (decoder.readIndex());
+        if (unionIndex366 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, null);
+        } else {
+            if (unionIndex366 == 1) {
+                Utf8 charSequence366;
+                Object oldString366 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(366);
+                if (oldString366 instanceof Utf8) {
+                    charSequence366 = (decoder).readString(((Utf8) oldString366));
+                } else {
+                    charSequence366 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, charSequence366);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F366': "+ unionIndex366));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex367 = (decoder.readIndex());
+        if (unionIndex367 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, null);
+        } else {
+            if (unionIndex367 == 1) {
+                Utf8 charSequence367;
+                Object oldString367 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(367);
+                if (oldString367 instanceof Utf8) {
+                    charSequence367 = (decoder).readString(((Utf8) oldString367));
+                } else {
+                    charSequence367 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, charSequence367);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F367': "+ unionIndex367));
+            }
+        }
+        int unionIndex368 = (decoder.readIndex());
+        if (unionIndex368 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, null);
+        } else {
+            if (unionIndex368 == 1) {
+                Utf8 charSequence368;
+                Object oldString368 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(368);
+                if (oldString368 instanceof Utf8) {
+                    charSequence368 = (decoder).readString(((Utf8) oldString368));
+                } else {
+                    charSequence368 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, charSequence368);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F368': "+ unionIndex368));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex369 = (decoder.readIndex());
+        if (unionIndex369 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, null);
+        } else {
+            if (unionIndex369 == 1) {
+                Utf8 charSequence369;
+                Object oldString369 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(369);
+                if (oldString369 instanceof Utf8) {
+                    charSequence369 = (decoder).readString(((Utf8) oldString369));
+                } else {
+                    charSequence369 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, charSequence369);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F369': "+ unionIndex369));
+            }
+        }
+        int unionIndex370 = (decoder.readIndex());
+        if (unionIndex370 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, null);
+        } else {
+            if (unionIndex370 == 1) {
+                Utf8 charSequence370;
+                Object oldString370 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(370);
+                if (oldString370 instanceof Utf8) {
+                    charSequence370 = (decoder).readString(((Utf8) oldString370));
+                } else {
+                    charSequence370 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, charSequence370);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F370': "+ unionIndex370));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex371 = (decoder.readIndex());
+        if (unionIndex371 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, null);
+        } else {
+            if (unionIndex371 == 1) {
+                Utf8 charSequence371;
+                Object oldString371 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(371);
+                if (oldString371 instanceof Utf8) {
+                    charSequence371 = (decoder).readString(((Utf8) oldString371));
+                } else {
+                    charSequence371 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, charSequence371);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F371': "+ unionIndex371));
+            }
+        }
+        int unionIndex372 = (decoder.readIndex());
+        if (unionIndex372 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, null);
+        } else {
+            if (unionIndex372 == 1) {
+                Utf8 charSequence372;
+                Object oldString372 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(372);
+                if (oldString372 instanceof Utf8) {
+                    charSequence372 = (decoder).readString(((Utf8) oldString372));
+                } else {
+                    charSequence372 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, charSequence372);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F372': "+ unionIndex372));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex373 = (decoder.readIndex());
+        if (unionIndex373 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, null);
+        } else {
+            if (unionIndex373 == 1) {
+                Utf8 charSequence373;
+                Object oldString373 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(373);
+                if (oldString373 instanceof Utf8) {
+                    charSequence373 = (decoder).readString(((Utf8) oldString373));
+                } else {
+                    charSequence373 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, charSequence373);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F373': "+ unionIndex373));
+            }
+        }
+        int unionIndex374 = (decoder.readIndex());
+        if (unionIndex374 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, null);
+        } else {
+            if (unionIndex374 == 1) {
+                Utf8 charSequence374;
+                Object oldString374 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(374);
+                if (oldString374 instanceof Utf8) {
+                    charSequence374 = (decoder).readString(((Utf8) oldString374));
+                } else {
+                    charSequence374 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, charSequence374);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F374': "+ unionIndex374));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex375 = (decoder.readIndex());
+        if (unionIndex375 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, null);
+        } else {
+            if (unionIndex375 == 1) {
+                Utf8 charSequence375;
+                Object oldString375 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(375);
+                if (oldString375 instanceof Utf8) {
+                    charSequence375 = (decoder).readString(((Utf8) oldString375));
+                } else {
+                    charSequence375 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, charSequence375);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F375': "+ unionIndex375));
+            }
+        }
+        int unionIndex376 = (decoder.readIndex());
+        if (unionIndex376 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, null);
+        } else {
+            if (unionIndex376 == 1) {
+                Utf8 charSequence376;
+                Object oldString376 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(376);
+                if (oldString376 instanceof Utf8) {
+                    charSequence376 = (decoder).readString(((Utf8) oldString376));
+                } else {
+                    charSequence376 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, charSequence376);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F376': "+ unionIndex376));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex377 = (decoder.readIndex());
+        if (unionIndex377 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, null);
+        } else {
+            if (unionIndex377 == 1) {
+                Utf8 charSequence377;
+                Object oldString377 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(377);
+                if (oldString377 instanceof Utf8) {
+                    charSequence377 = (decoder).readString(((Utf8) oldString377));
+                } else {
+                    charSequence377 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, charSequence377);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F377': "+ unionIndex377));
+            }
+        }
+        int unionIndex378 = (decoder.readIndex());
+        if (unionIndex378 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, null);
+        } else {
+            if (unionIndex378 == 1) {
+                Utf8 charSequence378;
+                Object oldString378 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(378);
+                if (oldString378 instanceof Utf8) {
+                    charSequence378 = (decoder).readString(((Utf8) oldString378));
+                } else {
+                    charSequence378 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, charSequence378);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F378': "+ unionIndex378));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex379 = (decoder.readIndex());
+        if (unionIndex379 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, null);
+        } else {
+            if (unionIndex379 == 1) {
+                Utf8 charSequence379;
+                Object oldString379 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(379);
+                if (oldString379 instanceof Utf8) {
+                    charSequence379 = (decoder).readString(((Utf8) oldString379));
+                } else {
+                    charSequence379 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, charSequence379);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F379': "+ unionIndex379));
+            }
+        }
+        int unionIndex380 = (decoder.readIndex());
+        if (unionIndex380 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, null);
+        } else {
+            if (unionIndex380 == 1) {
+                Utf8 charSequence380;
+                Object oldString380 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(380);
+                if (oldString380 instanceof Utf8) {
+                    charSequence380 = (decoder).readString(((Utf8) oldString380));
+                } else {
+                    charSequence380 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, charSequence380);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F380': "+ unionIndex380));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex381 = (decoder.readIndex());
+        if (unionIndex381 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, null);
+        } else {
+            if (unionIndex381 == 1) {
+                Utf8 charSequence381;
+                Object oldString381 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(381);
+                if (oldString381 instanceof Utf8) {
+                    charSequence381 = (decoder).readString(((Utf8) oldString381));
+                } else {
+                    charSequence381 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, charSequence381);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F381': "+ unionIndex381));
+            }
+        }
+        int unionIndex382 = (decoder.readIndex());
+        if (unionIndex382 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, null);
+        } else {
+            if (unionIndex382 == 1) {
+                Utf8 charSequence382;
+                Object oldString382 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(382);
+                if (oldString382 instanceof Utf8) {
+                    charSequence382 = (decoder).readString(((Utf8) oldString382));
+                } else {
+                    charSequence382 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, charSequence382);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F382': "+ unionIndex382));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex383 = (decoder.readIndex());
+        if (unionIndex383 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, null);
+        } else {
+            if (unionIndex383 == 1) {
+                Utf8 charSequence383;
+                Object oldString383 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(383);
+                if (oldString383 instanceof Utf8) {
+                    charSequence383 = (decoder).readString(((Utf8) oldString383));
+                } else {
+                    charSequence383 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, charSequence383);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F383': "+ unionIndex383));
+            }
+        }
+        int unionIndex384 = (decoder.readIndex());
+        if (unionIndex384 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, null);
+        } else {
+            if (unionIndex384 == 1) {
+                Utf8 charSequence384;
+                Object oldString384 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(384);
+                if (oldString384 instanceof Utf8) {
+                    charSequence384 = (decoder).readString(((Utf8) oldString384));
+                } else {
+                    charSequence384 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, charSequence384);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F384': "+ unionIndex384));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex385 = (decoder.readIndex());
+        if (unionIndex385 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, null);
+        } else {
+            if (unionIndex385 == 1) {
+                Utf8 charSequence385;
+                Object oldString385 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(385);
+                if (oldString385 instanceof Utf8) {
+                    charSequence385 = (decoder).readString(((Utf8) oldString385));
+                } else {
+                    charSequence385 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, charSequence385);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F385': "+ unionIndex385));
+            }
+        }
+        int unionIndex386 = (decoder.readIndex());
+        if (unionIndex386 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, null);
+        } else {
+            if (unionIndex386 == 1) {
+                Utf8 charSequence386;
+                Object oldString386 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(386);
+                if (oldString386 instanceof Utf8) {
+                    charSequence386 = (decoder).readString(((Utf8) oldString386));
+                } else {
+                    charSequence386 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, charSequence386);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F386': "+ unionIndex386));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex387 = (decoder.readIndex());
+        if (unionIndex387 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, null);
+        } else {
+            if (unionIndex387 == 1) {
+                Utf8 charSequence387;
+                Object oldString387 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(387);
+                if (oldString387 instanceof Utf8) {
+                    charSequence387 = (decoder).readString(((Utf8) oldString387));
+                } else {
+                    charSequence387 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, charSequence387);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F387': "+ unionIndex387));
+            }
+        }
+        int unionIndex388 = (decoder.readIndex());
+        if (unionIndex388 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, null);
+        } else {
+            if (unionIndex388 == 1) {
+                Utf8 charSequence388;
+                Object oldString388 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(388);
+                if (oldString388 instanceof Utf8) {
+                    charSequence388 = (decoder).readString(((Utf8) oldString388));
+                } else {
+                    charSequence388 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, charSequence388);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F388': "+ unionIndex388));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex389 = (decoder.readIndex());
+        if (unionIndex389 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, null);
+        } else {
+            if (unionIndex389 == 1) {
+                Utf8 charSequence389;
+                Object oldString389 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(389);
+                if (oldString389 instanceof Utf8) {
+                    charSequence389 = (decoder).readString(((Utf8) oldString389));
+                } else {
+                    charSequence389 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, charSequence389);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F389': "+ unionIndex389));
+            }
+        }
+        int unionIndex390 = (decoder.readIndex());
+        if (unionIndex390 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, null);
+        } else {
+            if (unionIndex390 == 1) {
+                Utf8 charSequence390;
+                Object oldString390 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(390);
+                if (oldString390 instanceof Utf8) {
+                    charSequence390 = (decoder).readString(((Utf8) oldString390));
+                } else {
+                    charSequence390 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, charSequence390);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F390': "+ unionIndex390));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex391 = (decoder.readIndex());
+        if (unionIndex391 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, null);
+        } else {
+            if (unionIndex391 == 1) {
+                Utf8 charSequence391;
+                Object oldString391 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(391);
+                if (oldString391 instanceof Utf8) {
+                    charSequence391 = (decoder).readString(((Utf8) oldString391));
+                } else {
+                    charSequence391 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, charSequence391);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F391': "+ unionIndex391));
+            }
+        }
+        int unionIndex392 = (decoder.readIndex());
+        if (unionIndex392 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, null);
+        } else {
+            if (unionIndex392 == 1) {
+                Utf8 charSequence392;
+                Object oldString392 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(392);
+                if (oldString392 instanceof Utf8) {
+                    charSequence392 = (decoder).readString(((Utf8) oldString392));
+                } else {
+                    charSequence392 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, charSequence392);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F392': "+ unionIndex392));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex393 = (decoder.readIndex());
+        if (unionIndex393 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, null);
+        } else {
+            if (unionIndex393 == 1) {
+                Utf8 charSequence393;
+                Object oldString393 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(393);
+                if (oldString393 instanceof Utf8) {
+                    charSequence393 = (decoder).readString(((Utf8) oldString393));
+                } else {
+                    charSequence393 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, charSequence393);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F393': "+ unionIndex393));
+            }
+        }
+        int unionIndex394 = (decoder.readIndex());
+        if (unionIndex394 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, null);
+        } else {
+            if (unionIndex394 == 1) {
+                Utf8 charSequence394;
+                Object oldString394 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(394);
+                if (oldString394 instanceof Utf8) {
+                    charSequence394 = (decoder).readString(((Utf8) oldString394));
+                } else {
+                    charSequence394 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, charSequence394);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F394': "+ unionIndex394));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex395 = (decoder.readIndex());
+        if (unionIndex395 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, null);
+        } else {
+            if (unionIndex395 == 1) {
+                Utf8 charSequence395;
+                Object oldString395 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(395);
+                if (oldString395 instanceof Utf8) {
+                    charSequence395 = (decoder).readString(((Utf8) oldString395));
+                } else {
+                    charSequence395 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, charSequence395);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F395': "+ unionIndex395));
+            }
+        }
+        int unionIndex396 = (decoder.readIndex());
+        if (unionIndex396 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, null);
+        } else {
+            if (unionIndex396 == 1) {
+                Utf8 charSequence396;
+                Object oldString396 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(396);
+                if (oldString396 instanceof Utf8) {
+                    charSequence396 = (decoder).readString(((Utf8) oldString396));
+                } else {
+                    charSequence396 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, charSequence396);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F396': "+ unionIndex396));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex397 = (decoder.readIndex());
+        if (unionIndex397 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, null);
+        } else {
+            if (unionIndex397 == 1) {
+                Utf8 charSequence397;
+                Object oldString397 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(397);
+                if (oldString397 instanceof Utf8) {
+                    charSequence397 = (decoder).readString(((Utf8) oldString397));
+                } else {
+                    charSequence397 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, charSequence397);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F397': "+ unionIndex397));
+            }
+        }
+        int unionIndex398 = (decoder.readIndex());
+        if (unionIndex398 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, null);
+        } else {
+            if (unionIndex398 == 1) {
+                Utf8 charSequence398;
+                Object oldString398 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(398);
+                if (oldString398 instanceof Utf8) {
+                    charSequence398 = (decoder).readString(((Utf8) oldString398));
+                } else {
+                    charSequence398 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, charSequence398);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F398': "+ unionIndex398));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex399 = (decoder.readIndex());
+        if (unionIndex399 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, null);
+        } else {
+            if (unionIndex399 == 1) {
+                Utf8 charSequence399;
+                Object oldString399 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(399);
+                if (oldString399 instanceof Utf8) {
+                    charSequence399 = (decoder).readString(((Utf8) oldString399));
+                } else {
+                    charSequence399 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, charSequence399);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F399': "+ unionIndex399));
+            }
+        }
+        int unionIndex400 = (decoder.readIndex());
+        if (unionIndex400 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, null);
+        } else {
+            if (unionIndex400 == 1) {
+                Utf8 charSequence400;
+                Object oldString400 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(400);
+                if (oldString400 instanceof Utf8) {
+                    charSequence400 = (decoder).readString(((Utf8) oldString400));
+                } else {
+                    charSequence400 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, charSequence400);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F400': "+ unionIndex400));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex401 = (decoder.readIndex());
+        if (unionIndex401 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, null);
+        } else {
+            if (unionIndex401 == 1) {
+                Utf8 charSequence401;
+                Object oldString401 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(401);
+                if (oldString401 instanceof Utf8) {
+                    charSequence401 = (decoder).readString(((Utf8) oldString401));
+                } else {
+                    charSequence401 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, charSequence401);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F401': "+ unionIndex401));
+            }
+        }
+        int unionIndex402 = (decoder.readIndex());
+        if (unionIndex402 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, null);
+        } else {
+            if (unionIndex402 == 1) {
+                Utf8 charSequence402;
+                Object oldString402 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(402);
+                if (oldString402 instanceof Utf8) {
+                    charSequence402 = (decoder).readString(((Utf8) oldString402));
+                } else {
+                    charSequence402 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, charSequence402);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F402': "+ unionIndex402));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex403 = (decoder.readIndex());
+        if (unionIndex403 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, null);
+        } else {
+            if (unionIndex403 == 1) {
+                Utf8 charSequence403;
+                Object oldString403 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(403);
+                if (oldString403 instanceof Utf8) {
+                    charSequence403 = (decoder).readString(((Utf8) oldString403));
+                } else {
+                    charSequence403 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, charSequence403);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F403': "+ unionIndex403));
+            }
+        }
+        int unionIndex404 = (decoder.readIndex());
+        if (unionIndex404 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, null);
+        } else {
+            if (unionIndex404 == 1) {
+                Utf8 charSequence404;
+                Object oldString404 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(404);
+                if (oldString404 instanceof Utf8) {
+                    charSequence404 = (decoder).readString(((Utf8) oldString404));
+                } else {
+                    charSequence404 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, charSequence404);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F404': "+ unionIndex404));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex405 = (decoder.readIndex());
+        if (unionIndex405 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, null);
+        } else {
+            if (unionIndex405 == 1) {
+                Utf8 charSequence405;
+                Object oldString405 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(405);
+                if (oldString405 instanceof Utf8) {
+                    charSequence405 = (decoder).readString(((Utf8) oldString405));
+                } else {
+                    charSequence405 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, charSequence405);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F405': "+ unionIndex405));
+            }
+        }
+        int unionIndex406 = (decoder.readIndex());
+        if (unionIndex406 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, null);
+        } else {
+            if (unionIndex406 == 1) {
+                Utf8 charSequence406;
+                Object oldString406 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(406);
+                if (oldString406 instanceof Utf8) {
+                    charSequence406 = (decoder).readString(((Utf8) oldString406));
+                } else {
+                    charSequence406 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, charSequence406);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F406': "+ unionIndex406));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex407 = (decoder.readIndex());
+        if (unionIndex407 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, null);
+        } else {
+            if (unionIndex407 == 1) {
+                Utf8 charSequence407;
+                Object oldString407 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(407);
+                if (oldString407 instanceof Utf8) {
+                    charSequence407 = (decoder).readString(((Utf8) oldString407));
+                } else {
+                    charSequence407 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, charSequence407);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F407': "+ unionIndex407));
+            }
+        }
+        int unionIndex408 = (decoder.readIndex());
+        if (unionIndex408 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, null);
+        } else {
+            if (unionIndex408 == 1) {
+                Utf8 charSequence408;
+                Object oldString408 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(408);
+                if (oldString408 instanceof Utf8) {
+                    charSequence408 = (decoder).readString(((Utf8) oldString408));
+                } else {
+                    charSequence408 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, charSequence408);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F408': "+ unionIndex408));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex409 = (decoder.readIndex());
+        if (unionIndex409 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, null);
+        } else {
+            if (unionIndex409 == 1) {
+                Utf8 charSequence409;
+                Object oldString409 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(409);
+                if (oldString409 instanceof Utf8) {
+                    charSequence409 = (decoder).readString(((Utf8) oldString409));
+                } else {
+                    charSequence409 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, charSequence409);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F409': "+ unionIndex409));
+            }
+        }
+        int unionIndex410 = (decoder.readIndex());
+        if (unionIndex410 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, null);
+        } else {
+            if (unionIndex410 == 1) {
+                Utf8 charSequence410;
+                Object oldString410 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(410);
+                if (oldString410 instanceof Utf8) {
+                    charSequence410 = (decoder).readString(((Utf8) oldString410));
+                } else {
+                    charSequence410 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, charSequence410);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F410': "+ unionIndex410));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex411 = (decoder.readIndex());
+        if (unionIndex411 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, null);
+        } else {
+            if (unionIndex411 == 1) {
+                Utf8 charSequence411;
+                Object oldString411 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(411);
+                if (oldString411 instanceof Utf8) {
+                    charSequence411 = (decoder).readString(((Utf8) oldString411));
+                } else {
+                    charSequence411 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, charSequence411);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F411': "+ unionIndex411));
+            }
+        }
+        int unionIndex412 = (decoder.readIndex());
+        if (unionIndex412 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, null);
+        } else {
+            if (unionIndex412 == 1) {
+                Utf8 charSequence412;
+                Object oldString412 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(412);
+                if (oldString412 instanceof Utf8) {
+                    charSequence412 = (decoder).readString(((Utf8) oldString412));
+                } else {
+                    charSequence412 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, charSequence412);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F412': "+ unionIndex412));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex413 = (decoder.readIndex());
+        if (unionIndex413 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, null);
+        } else {
+            if (unionIndex413 == 1) {
+                Utf8 charSequence413;
+                Object oldString413 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(413);
+                if (oldString413 instanceof Utf8) {
+                    charSequence413 = (decoder).readString(((Utf8) oldString413));
+                } else {
+                    charSequence413 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, charSequence413);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F413': "+ unionIndex413));
+            }
+        }
+        int unionIndex414 = (decoder.readIndex());
+        if (unionIndex414 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, null);
+        } else {
+            if (unionIndex414 == 1) {
+                Utf8 charSequence414;
+                Object oldString414 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(414);
+                if (oldString414 instanceof Utf8) {
+                    charSequence414 = (decoder).readString(((Utf8) oldString414));
+                } else {
+                    charSequence414 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, charSequence414);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F414': "+ unionIndex414));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex415 = (decoder.readIndex());
+        if (unionIndex415 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, null);
+        } else {
+            if (unionIndex415 == 1) {
+                Utf8 charSequence415;
+                Object oldString415 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(415);
+                if (oldString415 instanceof Utf8) {
+                    charSequence415 = (decoder).readString(((Utf8) oldString415));
+                } else {
+                    charSequence415 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, charSequence415);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F415': "+ unionIndex415));
+            }
+        }
+        int unionIndex416 = (decoder.readIndex());
+        if (unionIndex416 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, null);
+        } else {
+            if (unionIndex416 == 1) {
+                Utf8 charSequence416;
+                Object oldString416 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(416);
+                if (oldString416 instanceof Utf8) {
+                    charSequence416 = (decoder).readString(((Utf8) oldString416));
+                } else {
+                    charSequence416 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, charSequence416);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F416': "+ unionIndex416));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex417 = (decoder.readIndex());
+        if (unionIndex417 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, null);
+        } else {
+            if (unionIndex417 == 1) {
+                Utf8 charSequence417;
+                Object oldString417 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(417);
+                if (oldString417 instanceof Utf8) {
+                    charSequence417 = (decoder).readString(((Utf8) oldString417));
+                } else {
+                    charSequence417 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, charSequence417);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F417': "+ unionIndex417));
+            }
+        }
+        int unionIndex418 = (decoder.readIndex());
+        if (unionIndex418 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, null);
+        } else {
+            if (unionIndex418 == 1) {
+                Utf8 charSequence418;
+                Object oldString418 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(418);
+                if (oldString418 instanceof Utf8) {
+                    charSequence418 = (decoder).readString(((Utf8) oldString418));
+                } else {
+                    charSequence418 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, charSequence418);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F418': "+ unionIndex418));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex419 = (decoder.readIndex());
+        if (unionIndex419 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, null);
+        } else {
+            if (unionIndex419 == 1) {
+                Utf8 charSequence419;
+                Object oldString419 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(419);
+                if (oldString419 instanceof Utf8) {
+                    charSequence419 = (decoder).readString(((Utf8) oldString419));
+                } else {
+                    charSequence419 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, charSequence419);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F419': "+ unionIndex419));
+            }
+        }
+        int unionIndex420 = (decoder.readIndex());
+        if (unionIndex420 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, null);
+        } else {
+            if (unionIndex420 == 1) {
+                Utf8 charSequence420;
+                Object oldString420 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(420);
+                if (oldString420 instanceof Utf8) {
+                    charSequence420 = (decoder).readString(((Utf8) oldString420));
+                } else {
+                    charSequence420 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, charSequence420);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F420': "+ unionIndex420));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex421 = (decoder.readIndex());
+        if (unionIndex421 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, null);
+        } else {
+            if (unionIndex421 == 1) {
+                Utf8 charSequence421;
+                Object oldString421 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(421);
+                if (oldString421 instanceof Utf8) {
+                    charSequence421 = (decoder).readString(((Utf8) oldString421));
+                } else {
+                    charSequence421 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, charSequence421);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F421': "+ unionIndex421));
+            }
+        }
+        int unionIndex422 = (decoder.readIndex());
+        if (unionIndex422 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, null);
+        } else {
+            if (unionIndex422 == 1) {
+                Utf8 charSequence422;
+                Object oldString422 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(422);
+                if (oldString422 instanceof Utf8) {
+                    charSequence422 = (decoder).readString(((Utf8) oldString422));
+                } else {
+                    charSequence422 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, charSequence422);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F422': "+ unionIndex422));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex423 = (decoder.readIndex());
+        if (unionIndex423 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, null);
+        } else {
+            if (unionIndex423 == 1) {
+                Utf8 charSequence423;
+                Object oldString423 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(423);
+                if (oldString423 instanceof Utf8) {
+                    charSequence423 = (decoder).readString(((Utf8) oldString423));
+                } else {
+                    charSequence423 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, charSequence423);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F423': "+ unionIndex423));
+            }
+        }
+        int unionIndex424 = (decoder.readIndex());
+        if (unionIndex424 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, null);
+        } else {
+            if (unionIndex424 == 1) {
+                Utf8 charSequence424;
+                Object oldString424 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(424);
+                if (oldString424 instanceof Utf8) {
+                    charSequence424 = (decoder).readString(((Utf8) oldString424));
+                } else {
+                    charSequence424 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, charSequence424);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F424': "+ unionIndex424));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex425 = (decoder.readIndex());
+        if (unionIndex425 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, null);
+        } else {
+            if (unionIndex425 == 1) {
+                Utf8 charSequence425;
+                Object oldString425 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(425);
+                if (oldString425 instanceof Utf8) {
+                    charSequence425 = (decoder).readString(((Utf8) oldString425));
+                } else {
+                    charSequence425 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, charSequence425);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F425': "+ unionIndex425));
+            }
+        }
+        int unionIndex426 = (decoder.readIndex());
+        if (unionIndex426 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, null);
+        } else {
+            if (unionIndex426 == 1) {
+                Utf8 charSequence426;
+                Object oldString426 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(426);
+                if (oldString426 instanceof Utf8) {
+                    charSequence426 = (decoder).readString(((Utf8) oldString426));
+                } else {
+                    charSequence426 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, charSequence426);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F426': "+ unionIndex426));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex427 = (decoder.readIndex());
+        if (unionIndex427 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, null);
+        } else {
+            if (unionIndex427 == 1) {
+                Utf8 charSequence427;
+                Object oldString427 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(427);
+                if (oldString427 instanceof Utf8) {
+                    charSequence427 = (decoder).readString(((Utf8) oldString427));
+                } else {
+                    charSequence427 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, charSequence427);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F427': "+ unionIndex427));
+            }
+        }
+        int unionIndex428 = (decoder.readIndex());
+        if (unionIndex428 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, null);
+        } else {
+            if (unionIndex428 == 1) {
+                Utf8 charSequence428;
+                Object oldString428 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(428);
+                if (oldString428 instanceof Utf8) {
+                    charSequence428 = (decoder).readString(((Utf8) oldString428));
+                } else {
+                    charSequence428 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, charSequence428);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F428': "+ unionIndex428));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex429 = (decoder.readIndex());
+        if (unionIndex429 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, null);
+        } else {
+            if (unionIndex429 == 1) {
+                Utf8 charSequence429;
+                Object oldString429 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(429);
+                if (oldString429 instanceof Utf8) {
+                    charSequence429 = (decoder).readString(((Utf8) oldString429));
+                } else {
+                    charSequence429 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, charSequence429);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F429': "+ unionIndex429));
+            }
+        }
+        int unionIndex430 = (decoder.readIndex());
+        if (unionIndex430 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, null);
+        } else {
+            if (unionIndex430 == 1) {
+                Utf8 charSequence430;
+                Object oldString430 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(430);
+                if (oldString430 instanceof Utf8) {
+                    charSequence430 = (decoder).readString(((Utf8) oldString430));
+                } else {
+                    charSequence430 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, charSequence430);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F430': "+ unionIndex430));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex431 = (decoder.readIndex());
+        if (unionIndex431 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, null);
+        } else {
+            if (unionIndex431 == 1) {
+                Utf8 charSequence431;
+                Object oldString431 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(431);
+                if (oldString431 instanceof Utf8) {
+                    charSequence431 = (decoder).readString(((Utf8) oldString431));
+                } else {
+                    charSequence431 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, charSequence431);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F431': "+ unionIndex431));
+            }
+        }
+        int unionIndex432 = (decoder.readIndex());
+        if (unionIndex432 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, null);
+        } else {
+            if (unionIndex432 == 1) {
+                Utf8 charSequence432;
+                Object oldString432 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(432);
+                if (oldString432 instanceof Utf8) {
+                    charSequence432 = (decoder).readString(((Utf8) oldString432));
+                } else {
+                    charSequence432 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, charSequence432);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F432': "+ unionIndex432));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex433 = (decoder.readIndex());
+        if (unionIndex433 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, null);
+        } else {
+            if (unionIndex433 == 1) {
+                Utf8 charSequence433;
+                Object oldString433 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(433);
+                if (oldString433 instanceof Utf8) {
+                    charSequence433 = (decoder).readString(((Utf8) oldString433));
+                } else {
+                    charSequence433 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, charSequence433);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F433': "+ unionIndex433));
+            }
+        }
+        int unionIndex434 = (decoder.readIndex());
+        if (unionIndex434 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, null);
+        } else {
+            if (unionIndex434 == 1) {
+                Utf8 charSequence434;
+                Object oldString434 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(434);
+                if (oldString434 instanceof Utf8) {
+                    charSequence434 = (decoder).readString(((Utf8) oldString434));
+                } else {
+                    charSequence434 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, charSequence434);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F434': "+ unionIndex434));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex435 = (decoder.readIndex());
+        if (unionIndex435 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, null);
+        } else {
+            if (unionIndex435 == 1) {
+                Utf8 charSequence435;
+                Object oldString435 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(435);
+                if (oldString435 instanceof Utf8) {
+                    charSequence435 = (decoder).readString(((Utf8) oldString435));
+                } else {
+                    charSequence435 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, charSequence435);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F435': "+ unionIndex435));
+            }
+        }
+        int unionIndex436 = (decoder.readIndex());
+        if (unionIndex436 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, null);
+        } else {
+            if (unionIndex436 == 1) {
+                Utf8 charSequence436;
+                Object oldString436 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(436);
+                if (oldString436 instanceof Utf8) {
+                    charSequence436 = (decoder).readString(((Utf8) oldString436));
+                } else {
+                    charSequence436 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, charSequence436);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F436': "+ unionIndex436));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex437 = (decoder.readIndex());
+        if (unionIndex437 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, null);
+        } else {
+            if (unionIndex437 == 1) {
+                Utf8 charSequence437;
+                Object oldString437 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(437);
+                if (oldString437 instanceof Utf8) {
+                    charSequence437 = (decoder).readString(((Utf8) oldString437));
+                } else {
+                    charSequence437 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, charSequence437);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F437': "+ unionIndex437));
+            }
+        }
+        int unionIndex438 = (decoder.readIndex());
+        if (unionIndex438 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, null);
+        } else {
+            if (unionIndex438 == 1) {
+                Utf8 charSequence438;
+                Object oldString438 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(438);
+                if (oldString438 instanceof Utf8) {
+                    charSequence438 = (decoder).readString(((Utf8) oldString438));
+                } else {
+                    charSequence438 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, charSequence438);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F438': "+ unionIndex438));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex439 = (decoder.readIndex());
+        if (unionIndex439 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, null);
+        } else {
+            if (unionIndex439 == 1) {
+                Utf8 charSequence439;
+                Object oldString439 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(439);
+                if (oldString439 instanceof Utf8) {
+                    charSequence439 = (decoder).readString(((Utf8) oldString439));
+                } else {
+                    charSequence439 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, charSequence439);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F439': "+ unionIndex439));
+            }
+        }
+        int unionIndex440 = (decoder.readIndex());
+        if (unionIndex440 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, null);
+        } else {
+            if (unionIndex440 == 1) {
+                Utf8 charSequence440;
+                Object oldString440 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(440);
+                if (oldString440 instanceof Utf8) {
+                    charSequence440 = (decoder).readString(((Utf8) oldString440));
+                } else {
+                    charSequence440 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, charSequence440);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F440': "+ unionIndex440));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex441 = (decoder.readIndex());
+        if (unionIndex441 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, null);
+        } else {
+            if (unionIndex441 == 1) {
+                Utf8 charSequence441;
+                Object oldString441 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(441);
+                if (oldString441 instanceof Utf8) {
+                    charSequence441 = (decoder).readString(((Utf8) oldString441));
+                } else {
+                    charSequence441 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, charSequence441);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F441': "+ unionIndex441));
+            }
+        }
+        int unionIndex442 = (decoder.readIndex());
+        if (unionIndex442 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, null);
+        } else {
+            if (unionIndex442 == 1) {
+                Utf8 charSequence442;
+                Object oldString442 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(442);
+                if (oldString442 instanceof Utf8) {
+                    charSequence442 = (decoder).readString(((Utf8) oldString442));
+                } else {
+                    charSequence442 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, charSequence442);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F442': "+ unionIndex442));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex443 = (decoder.readIndex());
+        if (unionIndex443 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, null);
+        } else {
+            if (unionIndex443 == 1) {
+                Utf8 charSequence443;
+                Object oldString443 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(443);
+                if (oldString443 instanceof Utf8) {
+                    charSequence443 = (decoder).readString(((Utf8) oldString443));
+                } else {
+                    charSequence443 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, charSequence443);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F443': "+ unionIndex443));
+            }
+        }
+        int unionIndex444 = (decoder.readIndex());
+        if (unionIndex444 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, null);
+        } else {
+            if (unionIndex444 == 1) {
+                Utf8 charSequence444;
+                Object oldString444 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(444);
+                if (oldString444 instanceof Utf8) {
+                    charSequence444 = (decoder).readString(((Utf8) oldString444));
+                } else {
+                    charSequence444 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, charSequence444);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F444': "+ unionIndex444));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex445 = (decoder.readIndex());
+        if (unionIndex445 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, null);
+        } else {
+            if (unionIndex445 == 1) {
+                Utf8 charSequence445;
+                Object oldString445 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(445);
+                if (oldString445 instanceof Utf8) {
+                    charSequence445 = (decoder).readString(((Utf8) oldString445));
+                } else {
+                    charSequence445 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, charSequence445);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F445': "+ unionIndex445));
+            }
+        }
+        int unionIndex446 = (decoder.readIndex());
+        if (unionIndex446 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, null);
+        } else {
+            if (unionIndex446 == 1) {
+                Utf8 charSequence446;
+                Object oldString446 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(446);
+                if (oldString446 instanceof Utf8) {
+                    charSequence446 = (decoder).readString(((Utf8) oldString446));
+                } else {
+                    charSequence446 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, charSequence446);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F446': "+ unionIndex446));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex447 = (decoder.readIndex());
+        if (unionIndex447 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, null);
+        } else {
+            if (unionIndex447 == 1) {
+                Utf8 charSequence447;
+                Object oldString447 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(447);
+                if (oldString447 instanceof Utf8) {
+                    charSequence447 = (decoder).readString(((Utf8) oldString447));
+                } else {
+                    charSequence447 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, charSequence447);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F447': "+ unionIndex447));
+            }
+        }
+        int unionIndex448 = (decoder.readIndex());
+        if (unionIndex448 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, null);
+        } else {
+            if (unionIndex448 == 1) {
+                Utf8 charSequence448;
+                Object oldString448 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(448);
+                if (oldString448 instanceof Utf8) {
+                    charSequence448 = (decoder).readString(((Utf8) oldString448));
+                } else {
+                    charSequence448 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, charSequence448);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F448': "+ unionIndex448));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex449 = (decoder.readIndex());
+        if (unionIndex449 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, null);
+        } else {
+            if (unionIndex449 == 1) {
+                Utf8 charSequence449;
+                Object oldString449 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(449);
+                if (oldString449 instanceof Utf8) {
+                    charSequence449 = (decoder).readString(((Utf8) oldString449));
+                } else {
+                    charSequence449 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, charSequence449);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F449': "+ unionIndex449));
+            }
+        }
+        int unionIndex450 = (decoder.readIndex());
+        if (unionIndex450 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, null);
+        } else {
+            if (unionIndex450 == 1) {
+                Utf8 charSequence450;
+                Object oldString450 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(450);
+                if (oldString450 instanceof Utf8) {
+                    charSequence450 = (decoder).readString(((Utf8) oldString450));
+                } else {
+                    charSequence450 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, charSequence450);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F450': "+ unionIndex450));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex451 = (decoder.readIndex());
+        if (unionIndex451 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, null);
+        } else {
+            if (unionIndex451 == 1) {
+                Utf8 charSequence451;
+                Object oldString451 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(451);
+                if (oldString451 instanceof Utf8) {
+                    charSequence451 = (decoder).readString(((Utf8) oldString451));
+                } else {
+                    charSequence451 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, charSequence451);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F451': "+ unionIndex451));
+            }
+        }
+        int unionIndex452 = (decoder.readIndex());
+        if (unionIndex452 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, null);
+        } else {
+            if (unionIndex452 == 1) {
+                Utf8 charSequence452;
+                Object oldString452 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(452);
+                if (oldString452 instanceof Utf8) {
+                    charSequence452 = (decoder).readString(((Utf8) oldString452));
+                } else {
+                    charSequence452 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, charSequence452);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F452': "+ unionIndex452));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex453 = (decoder.readIndex());
+        if (unionIndex453 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, null);
+        } else {
+            if (unionIndex453 == 1) {
+                Utf8 charSequence453;
+                Object oldString453 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(453);
+                if (oldString453 instanceof Utf8) {
+                    charSequence453 = (decoder).readString(((Utf8) oldString453));
+                } else {
+                    charSequence453 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, charSequence453);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F453': "+ unionIndex453));
+            }
+        }
+        int unionIndex454 = (decoder.readIndex());
+        if (unionIndex454 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, null);
+        } else {
+            if (unionIndex454 == 1) {
+                Utf8 charSequence454;
+                Object oldString454 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(454);
+                if (oldString454 instanceof Utf8) {
+                    charSequence454 = (decoder).readString(((Utf8) oldString454));
+                } else {
+                    charSequence454 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, charSequence454);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F454': "+ unionIndex454));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex455 = (decoder.readIndex());
+        if (unionIndex455 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, null);
+        } else {
+            if (unionIndex455 == 1) {
+                Utf8 charSequence455;
+                Object oldString455 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(455);
+                if (oldString455 instanceof Utf8) {
+                    charSequence455 = (decoder).readString(((Utf8) oldString455));
+                } else {
+                    charSequence455 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, charSequence455);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F455': "+ unionIndex455));
+            }
+        }
+        int unionIndex456 = (decoder.readIndex());
+        if (unionIndex456 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, null);
+        } else {
+            if (unionIndex456 == 1) {
+                Utf8 charSequence456;
+                Object oldString456 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(456);
+                if (oldString456 instanceof Utf8) {
+                    charSequence456 = (decoder).readString(((Utf8) oldString456));
+                } else {
+                    charSequence456 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, charSequence456);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F456': "+ unionIndex456));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex457 = (decoder.readIndex());
+        if (unionIndex457 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, null);
+        } else {
+            if (unionIndex457 == 1) {
+                Utf8 charSequence457;
+                Object oldString457 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(457);
+                if (oldString457 instanceof Utf8) {
+                    charSequence457 = (decoder).readString(((Utf8) oldString457));
+                } else {
+                    charSequence457 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, charSequence457);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F457': "+ unionIndex457));
+            }
+        }
+        int unionIndex458 = (decoder.readIndex());
+        if (unionIndex458 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, null);
+        } else {
+            if (unionIndex458 == 1) {
+                Utf8 charSequence458;
+                Object oldString458 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(458);
+                if (oldString458 instanceof Utf8) {
+                    charSequence458 = (decoder).readString(((Utf8) oldString458));
+                } else {
+                    charSequence458 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, charSequence458);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F458': "+ unionIndex458));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex459 = (decoder.readIndex());
+        if (unionIndex459 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, null);
+        } else {
+            if (unionIndex459 == 1) {
+                Utf8 charSequence459;
+                Object oldString459 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(459);
+                if (oldString459 instanceof Utf8) {
+                    charSequence459 = (decoder).readString(((Utf8) oldString459));
+                } else {
+                    charSequence459 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, charSequence459);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F459': "+ unionIndex459));
+            }
+        }
+        int unionIndex460 = (decoder.readIndex());
+        if (unionIndex460 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, null);
+        } else {
+            if (unionIndex460 == 1) {
+                Utf8 charSequence460;
+                Object oldString460 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(460);
+                if (oldString460 instanceof Utf8) {
+                    charSequence460 = (decoder).readString(((Utf8) oldString460));
+                } else {
+                    charSequence460 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, charSequence460);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F460': "+ unionIndex460));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex461 = (decoder.readIndex());
+        if (unionIndex461 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, null);
+        } else {
+            if (unionIndex461 == 1) {
+                Utf8 charSequence461;
+                Object oldString461 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(461);
+                if (oldString461 instanceof Utf8) {
+                    charSequence461 = (decoder).readString(((Utf8) oldString461));
+                } else {
+                    charSequence461 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, charSequence461);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F461': "+ unionIndex461));
+            }
+        }
+        int unionIndex462 = (decoder.readIndex());
+        if (unionIndex462 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, null);
+        } else {
+            if (unionIndex462 == 1) {
+                Utf8 charSequence462;
+                Object oldString462 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(462);
+                if (oldString462 instanceof Utf8) {
+                    charSequence462 = (decoder).readString(((Utf8) oldString462));
+                } else {
+                    charSequence462 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, charSequence462);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F462': "+ unionIndex462));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex463 = (decoder.readIndex());
+        if (unionIndex463 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, null);
+        } else {
+            if (unionIndex463 == 1) {
+                Utf8 charSequence463;
+                Object oldString463 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(463);
+                if (oldString463 instanceof Utf8) {
+                    charSequence463 = (decoder).readString(((Utf8) oldString463));
+                } else {
+                    charSequence463 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, charSequence463);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F463': "+ unionIndex463));
+            }
+        }
+        int unionIndex464 = (decoder.readIndex());
+        if (unionIndex464 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, null);
+        } else {
+            if (unionIndex464 == 1) {
+                Utf8 charSequence464;
+                Object oldString464 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(464);
+                if (oldString464 instanceof Utf8) {
+                    charSequence464 = (decoder).readString(((Utf8) oldString464));
+                } else {
+                    charSequence464 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, charSequence464);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F464': "+ unionIndex464));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex465 = (decoder.readIndex());
+        if (unionIndex465 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, null);
+        } else {
+            if (unionIndex465 == 1) {
+                Utf8 charSequence465;
+                Object oldString465 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(465);
+                if (oldString465 instanceof Utf8) {
+                    charSequence465 = (decoder).readString(((Utf8) oldString465));
+                } else {
+                    charSequence465 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, charSequence465);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F465': "+ unionIndex465));
+            }
+        }
+        int unionIndex466 = (decoder.readIndex());
+        if (unionIndex466 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, null);
+        } else {
+            if (unionIndex466 == 1) {
+                Utf8 charSequence466;
+                Object oldString466 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(466);
+                if (oldString466 instanceof Utf8) {
+                    charSequence466 = (decoder).readString(((Utf8) oldString466));
+                } else {
+                    charSequence466 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, charSequence466);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F466': "+ unionIndex466));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex467 = (decoder.readIndex());
+        if (unionIndex467 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, null);
+        } else {
+            if (unionIndex467 == 1) {
+                Utf8 charSequence467;
+                Object oldString467 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(467);
+                if (oldString467 instanceof Utf8) {
+                    charSequence467 = (decoder).readString(((Utf8) oldString467));
+                } else {
+                    charSequence467 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, charSequence467);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F467': "+ unionIndex467));
+            }
+        }
+        int unionIndex468 = (decoder.readIndex());
+        if (unionIndex468 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, null);
+        } else {
+            if (unionIndex468 == 1) {
+                Utf8 charSequence468;
+                Object oldString468 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(468);
+                if (oldString468 instanceof Utf8) {
+                    charSequence468 = (decoder).readString(((Utf8) oldString468));
+                } else {
+                    charSequence468 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, charSequence468);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F468': "+ unionIndex468));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex469 = (decoder.readIndex());
+        if (unionIndex469 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, null);
+        } else {
+            if (unionIndex469 == 1) {
+                Utf8 charSequence469;
+                Object oldString469 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(469);
+                if (oldString469 instanceof Utf8) {
+                    charSequence469 = (decoder).readString(((Utf8) oldString469));
+                } else {
+                    charSequence469 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, charSequence469);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F469': "+ unionIndex469));
+            }
+        }
+        int unionIndex470 = (decoder.readIndex());
+        if (unionIndex470 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, null);
+        } else {
+            if (unionIndex470 == 1) {
+                Utf8 charSequence470;
+                Object oldString470 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(470);
+                if (oldString470 instanceof Utf8) {
+                    charSequence470 = (decoder).readString(((Utf8) oldString470));
+                } else {
+                    charSequence470 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, charSequence470);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F470': "+ unionIndex470));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex471 = (decoder.readIndex());
+        if (unionIndex471 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, null);
+        } else {
+            if (unionIndex471 == 1) {
+                Utf8 charSequence471;
+                Object oldString471 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(471);
+                if (oldString471 instanceof Utf8) {
+                    charSequence471 = (decoder).readString(((Utf8) oldString471));
+                } else {
+                    charSequence471 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, charSequence471);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F471': "+ unionIndex471));
+            }
+        }
+        int unionIndex472 = (decoder.readIndex());
+        if (unionIndex472 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, null);
+        } else {
+            if (unionIndex472 == 1) {
+                Utf8 charSequence472;
+                Object oldString472 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(472);
+                if (oldString472 instanceof Utf8) {
+                    charSequence472 = (decoder).readString(((Utf8) oldString472));
+                } else {
+                    charSequence472 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, charSequence472);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F472': "+ unionIndex472));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex473 = (decoder.readIndex());
+        if (unionIndex473 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, null);
+        } else {
+            if (unionIndex473 == 1) {
+                Utf8 charSequence473;
+                Object oldString473 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(473);
+                if (oldString473 instanceof Utf8) {
+                    charSequence473 = (decoder).readString(((Utf8) oldString473));
+                } else {
+                    charSequence473 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, charSequence473);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F473': "+ unionIndex473));
+            }
+        }
+        int unionIndex474 = (decoder.readIndex());
+        if (unionIndex474 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, null);
+        } else {
+            if (unionIndex474 == 1) {
+                Utf8 charSequence474;
+                Object oldString474 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(474);
+                if (oldString474 instanceof Utf8) {
+                    charSequence474 = (decoder).readString(((Utf8) oldString474));
+                } else {
+                    charSequence474 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, charSequence474);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F474': "+ unionIndex474));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex475 = (decoder.readIndex());
+        if (unionIndex475 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, null);
+        } else {
+            if (unionIndex475 == 1) {
+                Utf8 charSequence475;
+                Object oldString475 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(475);
+                if (oldString475 instanceof Utf8) {
+                    charSequence475 = (decoder).readString(((Utf8) oldString475));
+                } else {
+                    charSequence475 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, charSequence475);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F475': "+ unionIndex475));
+            }
+        }
+        int unionIndex476 = (decoder.readIndex());
+        if (unionIndex476 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, null);
+        } else {
+            if (unionIndex476 == 1) {
+                Utf8 charSequence476;
+                Object oldString476 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(476);
+                if (oldString476 instanceof Utf8) {
+                    charSequence476 = (decoder).readString(((Utf8) oldString476));
+                } else {
+                    charSequence476 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, charSequence476);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F476': "+ unionIndex476));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex477 = (decoder.readIndex());
+        if (unionIndex477 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, null);
+        } else {
+            if (unionIndex477 == 1) {
+                Utf8 charSequence477;
+                Object oldString477 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(477);
+                if (oldString477 instanceof Utf8) {
+                    charSequence477 = (decoder).readString(((Utf8) oldString477));
+                } else {
+                    charSequence477 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, charSequence477);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F477': "+ unionIndex477));
+            }
+        }
+        int unionIndex478 = (decoder.readIndex());
+        if (unionIndex478 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, null);
+        } else {
+            if (unionIndex478 == 1) {
+                Utf8 charSequence478;
+                Object oldString478 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(478);
+                if (oldString478 instanceof Utf8) {
+                    charSequence478 = (decoder).readString(((Utf8) oldString478));
+                } else {
+                    charSequence478 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, charSequence478);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F478': "+ unionIndex478));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex479 = (decoder.readIndex());
+        if (unionIndex479 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, null);
+        } else {
+            if (unionIndex479 == 1) {
+                Utf8 charSequence479;
+                Object oldString479 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(479);
+                if (oldString479 instanceof Utf8) {
+                    charSequence479 = (decoder).readString(((Utf8) oldString479));
+                } else {
+                    charSequence479 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, charSequence479);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F479': "+ unionIndex479));
+            }
+        }
+        int unionIndex480 = (decoder.readIndex());
+        if (unionIndex480 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, null);
+        } else {
+            if (unionIndex480 == 1) {
+                Utf8 charSequence480;
+                Object oldString480 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(480);
+                if (oldString480 instanceof Utf8) {
+                    charSequence480 = (decoder).readString(((Utf8) oldString480));
+                } else {
+                    charSequence480 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, charSequence480);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F480': "+ unionIndex480));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex481 = (decoder.readIndex());
+        if (unionIndex481 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, null);
+        } else {
+            if (unionIndex481 == 1) {
+                Utf8 charSequence481;
+                Object oldString481 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(481);
+                if (oldString481 instanceof Utf8) {
+                    charSequence481 = (decoder).readString(((Utf8) oldString481));
+                } else {
+                    charSequence481 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, charSequence481);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F481': "+ unionIndex481));
+            }
+        }
+        int unionIndex482 = (decoder.readIndex());
+        if (unionIndex482 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, null);
+        } else {
+            if (unionIndex482 == 1) {
+                Utf8 charSequence482;
+                Object oldString482 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(482);
+                if (oldString482 instanceof Utf8) {
+                    charSequence482 = (decoder).readString(((Utf8) oldString482));
+                } else {
+                    charSequence482 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, charSequence482);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F482': "+ unionIndex482));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex483 = (decoder.readIndex());
+        if (unionIndex483 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, null);
+        } else {
+            if (unionIndex483 == 1) {
+                Utf8 charSequence483;
+                Object oldString483 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(483);
+                if (oldString483 instanceof Utf8) {
+                    charSequence483 = (decoder).readString(((Utf8) oldString483));
+                } else {
+                    charSequence483 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, charSequence483);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F483': "+ unionIndex483));
+            }
+        }
+        int unionIndex484 = (decoder.readIndex());
+        if (unionIndex484 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, null);
+        } else {
+            if (unionIndex484 == 1) {
+                Utf8 charSequence484;
+                Object oldString484 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(484);
+                if (oldString484 instanceof Utf8) {
+                    charSequence484 = (decoder).readString(((Utf8) oldString484));
+                } else {
+                    charSequence484 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, charSequence484);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F484': "+ unionIndex484));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex485 = (decoder.readIndex());
+        if (unionIndex485 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, null);
+        } else {
+            if (unionIndex485 == 1) {
+                Utf8 charSequence485;
+                Object oldString485 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(485);
+                if (oldString485 instanceof Utf8) {
+                    charSequence485 = (decoder).readString(((Utf8) oldString485));
+                } else {
+                    charSequence485 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, charSequence485);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F485': "+ unionIndex485));
+            }
+        }
+        int unionIndex486 = (decoder.readIndex());
+        if (unionIndex486 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, null);
+        } else {
+            if (unionIndex486 == 1) {
+                Utf8 charSequence486;
+                Object oldString486 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(486);
+                if (oldString486 instanceof Utf8) {
+                    charSequence486 = (decoder).readString(((Utf8) oldString486));
+                } else {
+                    charSequence486 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, charSequence486);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F486': "+ unionIndex486));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex487 = (decoder.readIndex());
+        if (unionIndex487 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, null);
+        } else {
+            if (unionIndex487 == 1) {
+                Utf8 charSequence487;
+                Object oldString487 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(487);
+                if (oldString487 instanceof Utf8) {
+                    charSequence487 = (decoder).readString(((Utf8) oldString487));
+                } else {
+                    charSequence487 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, charSequence487);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F487': "+ unionIndex487));
+            }
+        }
+        int unionIndex488 = (decoder.readIndex());
+        if (unionIndex488 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, null);
+        } else {
+            if (unionIndex488 == 1) {
+                Utf8 charSequence488;
+                Object oldString488 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(488);
+                if (oldString488 instanceof Utf8) {
+                    charSequence488 = (decoder).readString(((Utf8) oldString488));
+                } else {
+                    charSequence488 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, charSequence488);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F488': "+ unionIndex488));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex489 = (decoder.readIndex());
+        if (unionIndex489 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, null);
+        } else {
+            if (unionIndex489 == 1) {
+                Utf8 charSequence489;
+                Object oldString489 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(489);
+                if (oldString489 instanceof Utf8) {
+                    charSequence489 = (decoder).readString(((Utf8) oldString489));
+                } else {
+                    charSequence489 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, charSequence489);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F489': "+ unionIndex489));
+            }
+        }
+        int unionIndex490 = (decoder.readIndex());
+        if (unionIndex490 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, null);
+        } else {
+            if (unionIndex490 == 1) {
+                Utf8 charSequence490;
+                Object oldString490 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(490);
+                if (oldString490 instanceof Utf8) {
+                    charSequence490 = (decoder).readString(((Utf8) oldString490));
+                } else {
+                    charSequence490 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, charSequence490);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F490': "+ unionIndex490));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex491 = (decoder.readIndex());
+        if (unionIndex491 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, null);
+        } else {
+            if (unionIndex491 == 1) {
+                Utf8 charSequence491;
+                Object oldString491 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(491);
+                if (oldString491 instanceof Utf8) {
+                    charSequence491 = (decoder).readString(((Utf8) oldString491));
+                } else {
+                    charSequence491 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, charSequence491);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F491': "+ unionIndex491));
+            }
+        }
+        int unionIndex492 = (decoder.readIndex());
+        if (unionIndex492 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, null);
+        } else {
+            if (unionIndex492 == 1) {
+                Utf8 charSequence492;
+                Object oldString492 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(492);
+                if (oldString492 instanceof Utf8) {
+                    charSequence492 = (decoder).readString(((Utf8) oldString492));
+                } else {
+                    charSequence492 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, charSequence492);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F492': "+ unionIndex492));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex493 = (decoder.readIndex());
+        if (unionIndex493 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, null);
+        } else {
+            if (unionIndex493 == 1) {
+                Utf8 charSequence493;
+                Object oldString493 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(493);
+                if (oldString493 instanceof Utf8) {
+                    charSequence493 = (decoder).readString(((Utf8) oldString493));
+                } else {
+                    charSequence493 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, charSequence493);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F493': "+ unionIndex493));
+            }
+        }
+        int unionIndex494 = (decoder.readIndex());
+        if (unionIndex494 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, null);
+        } else {
+            if (unionIndex494 == 1) {
+                Utf8 charSequence494;
+                Object oldString494 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(494);
+                if (oldString494 instanceof Utf8) {
+                    charSequence494 = (decoder).readString(((Utf8) oldString494));
+                } else {
+                    charSequence494 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, charSequence494);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F494': "+ unionIndex494));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex495 = (decoder.readIndex());
+        if (unionIndex495 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, null);
+        } else {
+            if (unionIndex495 == 1) {
+                Utf8 charSequence495;
+                Object oldString495 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(495);
+                if (oldString495 instanceof Utf8) {
+                    charSequence495 = (decoder).readString(((Utf8) oldString495));
+                } else {
+                    charSequence495 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, charSequence495);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F495': "+ unionIndex495));
+            }
+        }
+        int unionIndex496 = (decoder.readIndex());
+        if (unionIndex496 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, null);
+        } else {
+            if (unionIndex496 == 1) {
+                Utf8 charSequence496;
+                Object oldString496 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(496);
+                if (oldString496 instanceof Utf8) {
+                    charSequence496 = (decoder).readString(((Utf8) oldString496));
+                } else {
+                    charSequence496 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, charSequence496);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F496': "+ unionIndex496));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex497 = (decoder.readIndex());
+        if (unionIndex497 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, null);
+        } else {
+            if (unionIndex497 == 1) {
+                Utf8 charSequence497;
+                Object oldString497 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(497);
+                if (oldString497 instanceof Utf8) {
+                    charSequence497 = (decoder).readString(((Utf8) oldString497));
+                } else {
+                    charSequence497 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, charSequence497);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F497': "+ unionIndex497));
+            }
+        }
+        int unionIndex498 = (decoder.readIndex());
+        if (unionIndex498 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, null);
+        } else {
+            if (unionIndex498 == 1) {
+                Utf8 charSequence498;
+                Object oldString498 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(498);
+                if (oldString498 instanceof Utf8) {
+                    charSequence498 = (decoder).readString(((Utf8) oldString498));
+                } else {
+                    charSequence498 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, charSequence498);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F498': "+ unionIndex498));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex499 = (decoder.readIndex());
+        if (unionIndex499 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, null);
+        } else {
+            if (unionIndex499 == 1) {
+                Utf8 charSequence499;
+                Object oldString499 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(499);
+                if (oldString499 instanceof Utf8) {
+                    charSequence499 = (decoder).readString(((Utf8) oldString499));
+                } else {
+                    charSequence499 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, charSequence499);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F499': "+ unionIndex499));
+            }
+        }
+        int unionIndex500 = (decoder.readIndex());
+        if (unionIndex500 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, null);
+        } else {
+            if (unionIndex500 == 1) {
+                Utf8 charSequence500;
+                Object oldString500 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(500);
+                if (oldString500 instanceof Utf8) {
+                    charSequence500 = (decoder).readString(((Utf8) oldString500));
+                } else {
+                    charSequence500 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, charSequence500);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F500': "+ unionIndex500));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex501 = (decoder.readIndex());
+        if (unionIndex501 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, null);
+        } else {
+            if (unionIndex501 == 1) {
+                Utf8 charSequence501;
+                Object oldString501 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(501);
+                if (oldString501 instanceof Utf8) {
+                    charSequence501 = (decoder).readString(((Utf8) oldString501));
+                } else {
+                    charSequence501 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, charSequence501);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F501': "+ unionIndex501));
+            }
+        }
+        int unionIndex502 = (decoder.readIndex());
+        if (unionIndex502 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, null);
+        } else {
+            if (unionIndex502 == 1) {
+                Utf8 charSequence502;
+                Object oldString502 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(502);
+                if (oldString502 instanceof Utf8) {
+                    charSequence502 = (decoder).readString(((Utf8) oldString502));
+                } else {
+                    charSequence502 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, charSequence502);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F502': "+ unionIndex502));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex503 = (decoder.readIndex());
+        if (unionIndex503 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, null);
+        } else {
+            if (unionIndex503 == 1) {
+                Utf8 charSequence503;
+                Object oldString503 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(503);
+                if (oldString503 instanceof Utf8) {
+                    charSequence503 = (decoder).readString(((Utf8) oldString503));
+                } else {
+                    charSequence503 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, charSequence503);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F503': "+ unionIndex503));
+            }
+        }
+        int unionIndex504 = (decoder.readIndex());
+        if (unionIndex504 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, null);
+        } else {
+            if (unionIndex504 == 1) {
+                Utf8 charSequence504;
+                Object oldString504 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(504);
+                if (oldString504 instanceof Utf8) {
+                    charSequence504 = (decoder).readString(((Utf8) oldString504));
+                } else {
+                    charSequence504 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, charSequence504);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F504': "+ unionIndex504));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex505 = (decoder.readIndex());
+        if (unionIndex505 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, null);
+        } else {
+            if (unionIndex505 == 1) {
+                Utf8 charSequence505;
+                Object oldString505 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(505);
+                if (oldString505 instanceof Utf8) {
+                    charSequence505 = (decoder).readString(((Utf8) oldString505));
+                } else {
+                    charSequence505 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, charSequence505);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F505': "+ unionIndex505));
+            }
+        }
+        int unionIndex506 = (decoder.readIndex());
+        if (unionIndex506 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, null);
+        } else {
+            if (unionIndex506 == 1) {
+                Utf8 charSequence506;
+                Object oldString506 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(506);
+                if (oldString506 instanceof Utf8) {
+                    charSequence506 = (decoder).readString(((Utf8) oldString506));
+                } else {
+                    charSequence506 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, charSequence506);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F506': "+ unionIndex506));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex507 = (decoder.readIndex());
+        if (unionIndex507 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, null);
+        } else {
+            if (unionIndex507 == 1) {
+                Utf8 charSequence507;
+                Object oldString507 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(507);
+                if (oldString507 instanceof Utf8) {
+                    charSequence507 = (decoder).readString(((Utf8) oldString507));
+                } else {
+                    charSequence507 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, charSequence507);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F507': "+ unionIndex507));
+            }
+        }
+        int unionIndex508 = (decoder.readIndex());
+        if (unionIndex508 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, null);
+        } else {
+            if (unionIndex508 == 1) {
+                Utf8 charSequence508;
+                Object oldString508 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(508);
+                if (oldString508 instanceof Utf8) {
+                    charSequence508 = (decoder).readString(((Utf8) oldString508));
+                } else {
+                    charSequence508 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, charSequence508);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F508': "+ unionIndex508));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex509 = (decoder.readIndex());
+        if (unionIndex509 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, null);
+        } else {
+            if (unionIndex509 == 1) {
+                Utf8 charSequence509;
+                Object oldString509 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(509);
+                if (oldString509 instanceof Utf8) {
+                    charSequence509 = (decoder).readString(((Utf8) oldString509));
+                } else {
+                    charSequence509 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, charSequence509);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F509': "+ unionIndex509));
+            }
+        }
+        int unionIndex510 = (decoder.readIndex());
+        if (unionIndex510 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, null);
+        } else {
+            if (unionIndex510 == 1) {
+                Utf8 charSequence510;
+                Object oldString510 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(510);
+                if (oldString510 instanceof Utf8) {
+                    charSequence510 = (decoder).readString(((Utf8) oldString510));
+                } else {
+                    charSequence510 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, charSequence510);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F510': "+ unionIndex510));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex511 = (decoder.readIndex());
+        if (unionIndex511 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, null);
+        } else {
+            if (unionIndex511 == 1) {
+                Utf8 charSequence511;
+                Object oldString511 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(511);
+                if (oldString511 instanceof Utf8) {
+                    charSequence511 = (decoder).readString(((Utf8) oldString511));
+                } else {
+                    charSequence511 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, charSequence511);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F511': "+ unionIndex511));
+            }
+        }
+        int unionIndex512 = (decoder.readIndex());
+        if (unionIndex512 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, null);
+        } else {
+            if (unionIndex512 == 1) {
+                Utf8 charSequence512;
+                Object oldString512 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(512);
+                if (oldString512 instanceof Utf8) {
+                    charSequence512 = (decoder).readString(((Utf8) oldString512));
+                } else {
+                    charSequence512 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, charSequence512);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F512': "+ unionIndex512));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex513 = (decoder.readIndex());
+        if (unionIndex513 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, null);
+        } else {
+            if (unionIndex513 == 1) {
+                Utf8 charSequence513;
+                Object oldString513 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(513);
+                if (oldString513 instanceof Utf8) {
+                    charSequence513 = (decoder).readString(((Utf8) oldString513));
+                } else {
+                    charSequence513 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, charSequence513);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F513': "+ unionIndex513));
+            }
+        }
+        int unionIndex514 = (decoder.readIndex());
+        if (unionIndex514 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, null);
+        } else {
+            if (unionIndex514 == 1) {
+                Utf8 charSequence514;
+                Object oldString514 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(514);
+                if (oldString514 instanceof Utf8) {
+                    charSequence514 = (decoder).readString(((Utf8) oldString514));
+                } else {
+                    charSequence514 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, charSequence514);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F514': "+ unionIndex514));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex515 = (decoder.readIndex());
+        if (unionIndex515 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, null);
+        } else {
+            if (unionIndex515 == 1) {
+                Utf8 charSequence515;
+                Object oldString515 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(515);
+                if (oldString515 instanceof Utf8) {
+                    charSequence515 = (decoder).readString(((Utf8) oldString515));
+                } else {
+                    charSequence515 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, charSequence515);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F515': "+ unionIndex515));
+            }
+        }
+        int unionIndex516 = (decoder.readIndex());
+        if (unionIndex516 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, null);
+        } else {
+            if (unionIndex516 == 1) {
+                Utf8 charSequence516;
+                Object oldString516 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(516);
+                if (oldString516 instanceof Utf8) {
+                    charSequence516 = (decoder).readString(((Utf8) oldString516));
+                } else {
+                    charSequence516 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, charSequence516);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F516': "+ unionIndex516));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex517 = (decoder.readIndex());
+        if (unionIndex517 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, null);
+        } else {
+            if (unionIndex517 == 1) {
+                Utf8 charSequence517;
+                Object oldString517 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(517);
+                if (oldString517 instanceof Utf8) {
+                    charSequence517 = (decoder).readString(((Utf8) oldString517));
+                } else {
+                    charSequence517 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, charSequence517);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F517': "+ unionIndex517));
+            }
+        }
+        int unionIndex518 = (decoder.readIndex());
+        if (unionIndex518 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, null);
+        } else {
+            if (unionIndex518 == 1) {
+                Utf8 charSequence518;
+                Object oldString518 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(518);
+                if (oldString518 instanceof Utf8) {
+                    charSequence518 = (decoder).readString(((Utf8) oldString518));
+                } else {
+                    charSequence518 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, charSequence518);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F518': "+ unionIndex518));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex519 = (decoder.readIndex());
+        if (unionIndex519 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, null);
+        } else {
+            if (unionIndex519 == 1) {
+                Utf8 charSequence519;
+                Object oldString519 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(519);
+                if (oldString519 instanceof Utf8) {
+                    charSequence519 = (decoder).readString(((Utf8) oldString519));
+                } else {
+                    charSequence519 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, charSequence519);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F519': "+ unionIndex519));
+            }
+        }
+        int unionIndex520 = (decoder.readIndex());
+        if (unionIndex520 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, null);
+        } else {
+            if (unionIndex520 == 1) {
+                Utf8 charSequence520;
+                Object oldString520 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(520);
+                if (oldString520 instanceof Utf8) {
+                    charSequence520 = (decoder).readString(((Utf8) oldString520));
+                } else {
+                    charSequence520 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, charSequence520);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F520': "+ unionIndex520));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex521 = (decoder.readIndex());
+        if (unionIndex521 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, null);
+        } else {
+            if (unionIndex521 == 1) {
+                Utf8 charSequence521;
+                Object oldString521 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(521);
+                if (oldString521 instanceof Utf8) {
+                    charSequence521 = (decoder).readString(((Utf8) oldString521));
+                } else {
+                    charSequence521 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, charSequence521);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F521': "+ unionIndex521));
+            }
+        }
+        int unionIndex522 = (decoder.readIndex());
+        if (unionIndex522 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, null);
+        } else {
+            if (unionIndex522 == 1) {
+                Utf8 charSequence522;
+                Object oldString522 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(522);
+                if (oldString522 instanceof Utf8) {
+                    charSequence522 = (decoder).readString(((Utf8) oldString522));
+                } else {
+                    charSequence522 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, charSequence522);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F522': "+ unionIndex522));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex523 = (decoder.readIndex());
+        if (unionIndex523 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, null);
+        } else {
+            if (unionIndex523 == 1) {
+                Utf8 charSequence523;
+                Object oldString523 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(523);
+                if (oldString523 instanceof Utf8) {
+                    charSequence523 = (decoder).readString(((Utf8) oldString523));
+                } else {
+                    charSequence523 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, charSequence523);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F523': "+ unionIndex523));
+            }
+        }
+        int unionIndex524 = (decoder.readIndex());
+        if (unionIndex524 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, null);
+        } else {
+            if (unionIndex524 == 1) {
+                Utf8 charSequence524;
+                Object oldString524 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(524);
+                if (oldString524 instanceof Utf8) {
+                    charSequence524 = (decoder).readString(((Utf8) oldString524));
+                } else {
+                    charSequence524 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, charSequence524);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F524': "+ unionIndex524));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex525 = (decoder.readIndex());
+        if (unionIndex525 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, null);
+        } else {
+            if (unionIndex525 == 1) {
+                Utf8 charSequence525;
+                Object oldString525 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(525);
+                if (oldString525 instanceof Utf8) {
+                    charSequence525 = (decoder).readString(((Utf8) oldString525));
+                } else {
+                    charSequence525 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, charSequence525);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F525': "+ unionIndex525));
+            }
+        }
+        int unionIndex526 = (decoder.readIndex());
+        if (unionIndex526 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, null);
+        } else {
+            if (unionIndex526 == 1) {
+                Utf8 charSequence526;
+                Object oldString526 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(526);
+                if (oldString526 instanceof Utf8) {
+                    charSequence526 = (decoder).readString(((Utf8) oldString526));
+                } else {
+                    charSequence526 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, charSequence526);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F526': "+ unionIndex526));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex527 = (decoder.readIndex());
+        if (unionIndex527 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, null);
+        } else {
+            if (unionIndex527 == 1) {
+                Utf8 charSequence527;
+                Object oldString527 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(527);
+                if (oldString527 instanceof Utf8) {
+                    charSequence527 = (decoder).readString(((Utf8) oldString527));
+                } else {
+                    charSequence527 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, charSequence527);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F527': "+ unionIndex527));
+            }
+        }
+        int unionIndex528 = (decoder.readIndex());
+        if (unionIndex528 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, null);
+        } else {
+            if (unionIndex528 == 1) {
+                Utf8 charSequence528;
+                Object oldString528 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(528);
+                if (oldString528 instanceof Utf8) {
+                    charSequence528 = (decoder).readString(((Utf8) oldString528));
+                } else {
+                    charSequence528 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, charSequence528);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F528': "+ unionIndex528));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex529 = (decoder.readIndex());
+        if (unionIndex529 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, null);
+        } else {
+            if (unionIndex529 == 1) {
+                Utf8 charSequence529;
+                Object oldString529 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(529);
+                if (oldString529 instanceof Utf8) {
+                    charSequence529 = (decoder).readString(((Utf8) oldString529));
+                } else {
+                    charSequence529 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, charSequence529);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F529': "+ unionIndex529));
+            }
+        }
+        int unionIndex530 = (decoder.readIndex());
+        if (unionIndex530 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, null);
+        } else {
+            if (unionIndex530 == 1) {
+                Utf8 charSequence530;
+                Object oldString530 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(530);
+                if (oldString530 instanceof Utf8) {
+                    charSequence530 = (decoder).readString(((Utf8) oldString530));
+                } else {
+                    charSequence530 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, charSequence530);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F530': "+ unionIndex530));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex531 = (decoder.readIndex());
+        if (unionIndex531 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, null);
+        } else {
+            if (unionIndex531 == 1) {
+                Utf8 charSequence531;
+                Object oldString531 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(531);
+                if (oldString531 instanceof Utf8) {
+                    charSequence531 = (decoder).readString(((Utf8) oldString531));
+                } else {
+                    charSequence531 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, charSequence531);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F531': "+ unionIndex531));
+            }
+        }
+        int unionIndex532 = (decoder.readIndex());
+        if (unionIndex532 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, null);
+        } else {
+            if (unionIndex532 == 1) {
+                Utf8 charSequence532;
+                Object oldString532 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(532);
+                if (oldString532 instanceof Utf8) {
+                    charSequence532 = (decoder).readString(((Utf8) oldString532));
+                } else {
+                    charSequence532 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, charSequence532);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F532': "+ unionIndex532));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex533 = (decoder.readIndex());
+        if (unionIndex533 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, null);
+        } else {
+            if (unionIndex533 == 1) {
+                Utf8 charSequence533;
+                Object oldString533 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(533);
+                if (oldString533 instanceof Utf8) {
+                    charSequence533 = (decoder).readString(((Utf8) oldString533));
+                } else {
+                    charSequence533 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, charSequence533);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F533': "+ unionIndex533));
+            }
+        }
+        int unionIndex534 = (decoder.readIndex());
+        if (unionIndex534 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, null);
+        } else {
+            if (unionIndex534 == 1) {
+                Utf8 charSequence534;
+                Object oldString534 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(534);
+                if (oldString534 instanceof Utf8) {
+                    charSequence534 = (decoder).readString(((Utf8) oldString534));
+                } else {
+                    charSequence534 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, charSequence534);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F534': "+ unionIndex534));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex535 = (decoder.readIndex());
+        if (unionIndex535 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, null);
+        } else {
+            if (unionIndex535 == 1) {
+                Utf8 charSequence535;
+                Object oldString535 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(535);
+                if (oldString535 instanceof Utf8) {
+                    charSequence535 = (decoder).readString(((Utf8) oldString535));
+                } else {
+                    charSequence535 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, charSequence535);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F535': "+ unionIndex535));
+            }
+        }
+        int unionIndex536 = (decoder.readIndex());
+        if (unionIndex536 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, null);
+        } else {
+            if (unionIndex536 == 1) {
+                Utf8 charSequence536;
+                Object oldString536 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(536);
+                if (oldString536 instanceof Utf8) {
+                    charSequence536 = (decoder).readString(((Utf8) oldString536));
+                } else {
+                    charSequence536 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, charSequence536);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F536': "+ unionIndex536));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex537 = (decoder.readIndex());
+        if (unionIndex537 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, null);
+        } else {
+            if (unionIndex537 == 1) {
+                Utf8 charSequence537;
+                Object oldString537 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(537);
+                if (oldString537 instanceof Utf8) {
+                    charSequence537 = (decoder).readString(((Utf8) oldString537));
+                } else {
+                    charSequence537 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, charSequence537);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F537': "+ unionIndex537));
+            }
+        }
+        int unionIndex538 = (decoder.readIndex());
+        if (unionIndex538 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, null);
+        } else {
+            if (unionIndex538 == 1) {
+                Utf8 charSequence538;
+                Object oldString538 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(538);
+                if (oldString538 instanceof Utf8) {
+                    charSequence538 = (decoder).readString(((Utf8) oldString538));
+                } else {
+                    charSequence538 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, charSequence538);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F538': "+ unionIndex538));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex539 = (decoder.readIndex());
+        if (unionIndex539 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, null);
+        } else {
+            if (unionIndex539 == 1) {
+                Utf8 charSequence539;
+                Object oldString539 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(539);
+                if (oldString539 instanceof Utf8) {
+                    charSequence539 = (decoder).readString(((Utf8) oldString539));
+                } else {
+                    charSequence539 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, charSequence539);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F539': "+ unionIndex539));
+            }
+        }
+        int unionIndex540 = (decoder.readIndex());
+        if (unionIndex540 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, null);
+        } else {
+            if (unionIndex540 == 1) {
+                Utf8 charSequence540;
+                Object oldString540 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(540);
+                if (oldString540 instanceof Utf8) {
+                    charSequence540 = (decoder).readString(((Utf8) oldString540));
+                } else {
+                    charSequence540 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, charSequence540);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F540': "+ unionIndex540));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex541 = (decoder.readIndex());
+        if (unionIndex541 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, null);
+        } else {
+            if (unionIndex541 == 1) {
+                Utf8 charSequence541;
+                Object oldString541 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(541);
+                if (oldString541 instanceof Utf8) {
+                    charSequence541 = (decoder).readString(((Utf8) oldString541));
+                } else {
+                    charSequence541 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, charSequence541);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F541': "+ unionIndex541));
+            }
+        }
+        int unionIndex542 = (decoder.readIndex());
+        if (unionIndex542 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, null);
+        } else {
+            if (unionIndex542 == 1) {
+                Utf8 charSequence542;
+                Object oldString542 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(542);
+                if (oldString542 instanceof Utf8) {
+                    charSequence542 = (decoder).readString(((Utf8) oldString542));
+                } else {
+                    charSequence542 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, charSequence542);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F542': "+ unionIndex542));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex543 = (decoder.readIndex());
+        if (unionIndex543 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, null);
+        } else {
+            if (unionIndex543 == 1) {
+                Utf8 charSequence543;
+                Object oldString543 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(543);
+                if (oldString543 instanceof Utf8) {
+                    charSequence543 = (decoder).readString(((Utf8) oldString543));
+                } else {
+                    charSequence543 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, charSequence543);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F543': "+ unionIndex543));
+            }
+        }
+        int unionIndex544 = (decoder.readIndex());
+        if (unionIndex544 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, null);
+        } else {
+            if (unionIndex544 == 1) {
+                Utf8 charSequence544;
+                Object oldString544 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(544);
+                if (oldString544 instanceof Utf8) {
+                    charSequence544 = (decoder).readString(((Utf8) oldString544));
+                } else {
+                    charSequence544 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, charSequence544);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F544': "+ unionIndex544));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex545 = (decoder.readIndex());
+        if (unionIndex545 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, null);
+        } else {
+            if (unionIndex545 == 1) {
+                Utf8 charSequence545;
+                Object oldString545 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(545);
+                if (oldString545 instanceof Utf8) {
+                    charSequence545 = (decoder).readString(((Utf8) oldString545));
+                } else {
+                    charSequence545 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, charSequence545);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F545': "+ unionIndex545));
+            }
+        }
+        int unionIndex546 = (decoder.readIndex());
+        if (unionIndex546 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, null);
+        } else {
+            if (unionIndex546 == 1) {
+                Utf8 charSequence546;
+                Object oldString546 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(546);
+                if (oldString546 instanceof Utf8) {
+                    charSequence546 = (decoder).readString(((Utf8) oldString546));
+                } else {
+                    charSequence546 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, charSequence546);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F546': "+ unionIndex546));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex547 = (decoder.readIndex());
+        if (unionIndex547 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, null);
+        } else {
+            if (unionIndex547 == 1) {
+                Utf8 charSequence547;
+                Object oldString547 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(547);
+                if (oldString547 instanceof Utf8) {
+                    charSequence547 = (decoder).readString(((Utf8) oldString547));
+                } else {
+                    charSequence547 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, charSequence547);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F547': "+ unionIndex547));
+            }
+        }
+        int unionIndex548 = (decoder.readIndex());
+        if (unionIndex548 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, null);
+        } else {
+            if (unionIndex548 == 1) {
+                Utf8 charSequence548;
+                Object oldString548 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(548);
+                if (oldString548 instanceof Utf8) {
+                    charSequence548 = (decoder).readString(((Utf8) oldString548));
+                } else {
+                    charSequence548 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, charSequence548);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F548': "+ unionIndex548));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex549 = (decoder.readIndex());
+        if (unionIndex549 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, null);
+        } else {
+            if (unionIndex549 == 1) {
+                Utf8 charSequence549;
+                Object oldString549 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(549);
+                if (oldString549 instanceof Utf8) {
+                    charSequence549 = (decoder).readString(((Utf8) oldString549));
+                } else {
+                    charSequence549 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, charSequence549);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F549': "+ unionIndex549));
+            }
+        }
+        int unionIndex550 = (decoder.readIndex());
+        if (unionIndex550 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, null);
+        } else {
+            if (unionIndex550 == 1) {
+                Utf8 charSequence550;
+                Object oldString550 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(550);
+                if (oldString550 instanceof Utf8) {
+                    charSequence550 = (decoder).readString(((Utf8) oldString550));
+                } else {
+                    charSequence550 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, charSequence550);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F550': "+ unionIndex550));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex551 = (decoder.readIndex());
+        if (unionIndex551 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, null);
+        } else {
+            if (unionIndex551 == 1) {
+                Utf8 charSequence551;
+                Object oldString551 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(551);
+                if (oldString551 instanceof Utf8) {
+                    charSequence551 = (decoder).readString(((Utf8) oldString551));
+                } else {
+                    charSequence551 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, charSequence551);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F551': "+ unionIndex551));
+            }
+        }
+        int unionIndex552 = (decoder.readIndex());
+        if (unionIndex552 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, null);
+        } else {
+            if (unionIndex552 == 1) {
+                Utf8 charSequence552;
+                Object oldString552 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(552);
+                if (oldString552 instanceof Utf8) {
+                    charSequence552 = (decoder).readString(((Utf8) oldString552));
+                } else {
+                    charSequence552 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, charSequence552);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F552': "+ unionIndex552));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex553 = (decoder.readIndex());
+        if (unionIndex553 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, null);
+        } else {
+            if (unionIndex553 == 1) {
+                Utf8 charSequence553;
+                Object oldString553 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(553);
+                if (oldString553 instanceof Utf8) {
+                    charSequence553 = (decoder).readString(((Utf8) oldString553));
+                } else {
+                    charSequence553 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, charSequence553);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F553': "+ unionIndex553));
+            }
+        }
+        int unionIndex554 = (decoder.readIndex());
+        if (unionIndex554 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, null);
+        } else {
+            if (unionIndex554 == 1) {
+                Utf8 charSequence554;
+                Object oldString554 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(554);
+                if (oldString554 instanceof Utf8) {
+                    charSequence554 = (decoder).readString(((Utf8) oldString554));
+                } else {
+                    charSequence554 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, charSequence554);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F554': "+ unionIndex554));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex555 = (decoder.readIndex());
+        if (unionIndex555 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, null);
+        } else {
+            if (unionIndex555 == 1) {
+                Utf8 charSequence555;
+                Object oldString555 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(555);
+                if (oldString555 instanceof Utf8) {
+                    charSequence555 = (decoder).readString(((Utf8) oldString555));
+                } else {
+                    charSequence555 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, charSequence555);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F555': "+ unionIndex555));
+            }
+        }
+        int unionIndex556 = (decoder.readIndex());
+        if (unionIndex556 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, null);
+        } else {
+            if (unionIndex556 == 1) {
+                Utf8 charSequence556;
+                Object oldString556 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(556);
+                if (oldString556 instanceof Utf8) {
+                    charSequence556 = (decoder).readString(((Utf8) oldString556));
+                } else {
+                    charSequence556 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, charSequence556);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F556': "+ unionIndex556));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex557 = (decoder.readIndex());
+        if (unionIndex557 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, null);
+        } else {
+            if (unionIndex557 == 1) {
+                Utf8 charSequence557;
+                Object oldString557 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(557);
+                if (oldString557 instanceof Utf8) {
+                    charSequence557 = (decoder).readString(((Utf8) oldString557));
+                } else {
+                    charSequence557 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, charSequence557);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F557': "+ unionIndex557));
+            }
+        }
+        int unionIndex558 = (decoder.readIndex());
+        if (unionIndex558 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, null);
+        } else {
+            if (unionIndex558 == 1) {
+                Utf8 charSequence558;
+                Object oldString558 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(558);
+                if (oldString558 instanceof Utf8) {
+                    charSequence558 = (decoder).readString(((Utf8) oldString558));
+                } else {
+                    charSequence558 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, charSequence558);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F558': "+ unionIndex558));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex559 = (decoder.readIndex());
+        if (unionIndex559 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, null);
+        } else {
+            if (unionIndex559 == 1) {
+                Utf8 charSequence559;
+                Object oldString559 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(559);
+                if (oldString559 instanceof Utf8) {
+                    charSequence559 = (decoder).readString(((Utf8) oldString559));
+                } else {
+                    charSequence559 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, charSequence559);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F559': "+ unionIndex559));
+            }
+        }
+        int unionIndex560 = (decoder.readIndex());
+        if (unionIndex560 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, null);
+        } else {
+            if (unionIndex560 == 1) {
+                Utf8 charSequence560;
+                Object oldString560 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(560);
+                if (oldString560 instanceof Utf8) {
+                    charSequence560 = (decoder).readString(((Utf8) oldString560));
+                } else {
+                    charSequence560 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, charSequence560);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F560': "+ unionIndex560));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex561 = (decoder.readIndex());
+        if (unionIndex561 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, null);
+        } else {
+            if (unionIndex561 == 1) {
+                Utf8 charSequence561;
+                Object oldString561 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(561);
+                if (oldString561 instanceof Utf8) {
+                    charSequence561 = (decoder).readString(((Utf8) oldString561));
+                } else {
+                    charSequence561 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, charSequence561);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F561': "+ unionIndex561));
+            }
+        }
+        int unionIndex562 = (decoder.readIndex());
+        if (unionIndex562 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, null);
+        } else {
+            if (unionIndex562 == 1) {
+                Utf8 charSequence562;
+                Object oldString562 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(562);
+                if (oldString562 instanceof Utf8) {
+                    charSequence562 = (decoder).readString(((Utf8) oldString562));
+                } else {
+                    charSequence562 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, charSequence562);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F562': "+ unionIndex562));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex563 = (decoder.readIndex());
+        if (unionIndex563 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, null);
+        } else {
+            if (unionIndex563 == 1) {
+                Utf8 charSequence563;
+                Object oldString563 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(563);
+                if (oldString563 instanceof Utf8) {
+                    charSequence563 = (decoder).readString(((Utf8) oldString563));
+                } else {
+                    charSequence563 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, charSequence563);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F563': "+ unionIndex563));
+            }
+        }
+        int unionIndex564 = (decoder.readIndex());
+        if (unionIndex564 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, null);
+        } else {
+            if (unionIndex564 == 1) {
+                Utf8 charSequence564;
+                Object oldString564 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(564);
+                if (oldString564 instanceof Utf8) {
+                    charSequence564 = (decoder).readString(((Utf8) oldString564));
+                } else {
+                    charSequence564 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, charSequence564);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F564': "+ unionIndex564));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex565 = (decoder.readIndex());
+        if (unionIndex565 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, null);
+        } else {
+            if (unionIndex565 == 1) {
+                Utf8 charSequence565;
+                Object oldString565 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(565);
+                if (oldString565 instanceof Utf8) {
+                    charSequence565 = (decoder).readString(((Utf8) oldString565));
+                } else {
+                    charSequence565 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, charSequence565);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F565': "+ unionIndex565));
+            }
+        }
+        int unionIndex566 = (decoder.readIndex());
+        if (unionIndex566 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, null);
+        } else {
+            if (unionIndex566 == 1) {
+                Utf8 charSequence566;
+                Object oldString566 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(566);
+                if (oldString566 instanceof Utf8) {
+                    charSequence566 = (decoder).readString(((Utf8) oldString566));
+                } else {
+                    charSequence566 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, charSequence566);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F566': "+ unionIndex566));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex567 = (decoder.readIndex());
+        if (unionIndex567 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, null);
+        } else {
+            if (unionIndex567 == 1) {
+                Utf8 charSequence567;
+                Object oldString567 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(567);
+                if (oldString567 instanceof Utf8) {
+                    charSequence567 = (decoder).readString(((Utf8) oldString567));
+                } else {
+                    charSequence567 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, charSequence567);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F567': "+ unionIndex567));
+            }
+        }
+        int unionIndex568 = (decoder.readIndex());
+        if (unionIndex568 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, null);
+        } else {
+            if (unionIndex568 == 1) {
+                Utf8 charSequence568;
+                Object oldString568 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(568);
+                if (oldString568 instanceof Utf8) {
+                    charSequence568 = (decoder).readString(((Utf8) oldString568));
+                } else {
+                    charSequence568 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, charSequence568);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F568': "+ unionIndex568));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex569 = (decoder.readIndex());
+        if (unionIndex569 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, null);
+        } else {
+            if (unionIndex569 == 1) {
+                Utf8 charSequence569;
+                Object oldString569 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(569);
+                if (oldString569 instanceof Utf8) {
+                    charSequence569 = (decoder).readString(((Utf8) oldString569));
+                } else {
+                    charSequence569 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, charSequence569);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F569': "+ unionIndex569));
+            }
+        }
+        int unionIndex570 = (decoder.readIndex());
+        if (unionIndex570 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, null);
+        } else {
+            if (unionIndex570 == 1) {
+                Utf8 charSequence570;
+                Object oldString570 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(570);
+                if (oldString570 instanceof Utf8) {
+                    charSequence570 = (decoder).readString(((Utf8) oldString570));
+                } else {
+                    charSequence570 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, charSequence570);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F570': "+ unionIndex570));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex571 = (decoder.readIndex());
+        if (unionIndex571 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, null);
+        } else {
+            if (unionIndex571 == 1) {
+                Utf8 charSequence571;
+                Object oldString571 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(571);
+                if (oldString571 instanceof Utf8) {
+                    charSequence571 = (decoder).readString(((Utf8) oldString571));
+                } else {
+                    charSequence571 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, charSequence571);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F571': "+ unionIndex571));
+            }
+        }
+        int unionIndex572 = (decoder.readIndex());
+        if (unionIndex572 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, null);
+        } else {
+            if (unionIndex572 == 1) {
+                Utf8 charSequence572;
+                Object oldString572 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(572);
+                if (oldString572 instanceof Utf8) {
+                    charSequence572 = (decoder).readString(((Utf8) oldString572));
+                } else {
+                    charSequence572 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, charSequence572);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F572': "+ unionIndex572));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex573 = (decoder.readIndex());
+        if (unionIndex573 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, null);
+        } else {
+            if (unionIndex573 == 1) {
+                Utf8 charSequence573;
+                Object oldString573 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(573);
+                if (oldString573 instanceof Utf8) {
+                    charSequence573 = (decoder).readString(((Utf8) oldString573));
+                } else {
+                    charSequence573 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, charSequence573);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F573': "+ unionIndex573));
+            }
+        }
+        int unionIndex574 = (decoder.readIndex());
+        if (unionIndex574 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, null);
+        } else {
+            if (unionIndex574 == 1) {
+                Utf8 charSequence574;
+                Object oldString574 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(574);
+                if (oldString574 instanceof Utf8) {
+                    charSequence574 = (decoder).readString(((Utf8) oldString574));
+                } else {
+                    charSequence574 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, charSequence574);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F574': "+ unionIndex574));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex575 = (decoder.readIndex());
+        if (unionIndex575 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, null);
+        } else {
+            if (unionIndex575 == 1) {
+                Utf8 charSequence575;
+                Object oldString575 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(575);
+                if (oldString575 instanceof Utf8) {
+                    charSequence575 = (decoder).readString(((Utf8) oldString575));
+                } else {
+                    charSequence575 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, charSequence575);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F575': "+ unionIndex575));
+            }
+        }
+        int unionIndex576 = (decoder.readIndex());
+        if (unionIndex576 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, null);
+        } else {
+            if (unionIndex576 == 1) {
+                Utf8 charSequence576;
+                Object oldString576 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(576);
+                if (oldString576 instanceof Utf8) {
+                    charSequence576 = (decoder).readString(((Utf8) oldString576));
+                } else {
+                    charSequence576 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, charSequence576);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F576': "+ unionIndex576));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex577 = (decoder.readIndex());
+        if (unionIndex577 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, null);
+        } else {
+            if (unionIndex577 == 1) {
+                Utf8 charSequence577;
+                Object oldString577 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(577);
+                if (oldString577 instanceof Utf8) {
+                    charSequence577 = (decoder).readString(((Utf8) oldString577));
+                } else {
+                    charSequence577 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, charSequence577);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F577': "+ unionIndex577));
+            }
+        }
+        int unionIndex578 = (decoder.readIndex());
+        if (unionIndex578 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, null);
+        } else {
+            if (unionIndex578 == 1) {
+                Utf8 charSequence578;
+                Object oldString578 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(578);
+                if (oldString578 instanceof Utf8) {
+                    charSequence578 = (decoder).readString(((Utf8) oldString578));
+                } else {
+                    charSequence578 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, charSequence578);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F578': "+ unionIndex578));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex579 = (decoder.readIndex());
+        if (unionIndex579 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, null);
+        } else {
+            if (unionIndex579 == 1) {
+                Utf8 charSequence579;
+                Object oldString579 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(579);
+                if (oldString579 instanceof Utf8) {
+                    charSequence579 = (decoder).readString(((Utf8) oldString579));
+                } else {
+                    charSequence579 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, charSequence579);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F579': "+ unionIndex579));
+            }
+        }
+        int unionIndex580 = (decoder.readIndex());
+        if (unionIndex580 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, null);
+        } else {
+            if (unionIndex580 == 1) {
+                Utf8 charSequence580;
+                Object oldString580 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(580);
+                if (oldString580 instanceof Utf8) {
+                    charSequence580 = (decoder).readString(((Utf8) oldString580));
+                } else {
+                    charSequence580 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, charSequence580);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F580': "+ unionIndex580));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex581 = (decoder.readIndex());
+        if (unionIndex581 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, null);
+        } else {
+            if (unionIndex581 == 1) {
+                Utf8 charSequence581;
+                Object oldString581 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(581);
+                if (oldString581 instanceof Utf8) {
+                    charSequence581 = (decoder).readString(((Utf8) oldString581));
+                } else {
+                    charSequence581 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, charSequence581);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F581': "+ unionIndex581));
+            }
+        }
+        int unionIndex582 = (decoder.readIndex());
+        if (unionIndex582 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, null);
+        } else {
+            if (unionIndex582 == 1) {
+                Utf8 charSequence582;
+                Object oldString582 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(582);
+                if (oldString582 instanceof Utf8) {
+                    charSequence582 = (decoder).readString(((Utf8) oldString582));
+                } else {
+                    charSequence582 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, charSequence582);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F582': "+ unionIndex582));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex583 = (decoder.readIndex());
+        if (unionIndex583 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, null);
+        } else {
+            if (unionIndex583 == 1) {
+                Utf8 charSequence583;
+                Object oldString583 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(583);
+                if (oldString583 instanceof Utf8) {
+                    charSequence583 = (decoder).readString(((Utf8) oldString583));
+                } else {
+                    charSequence583 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, charSequence583);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F583': "+ unionIndex583));
+            }
+        }
+        int unionIndex584 = (decoder.readIndex());
+        if (unionIndex584 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, null);
+        } else {
+            if (unionIndex584 == 1) {
+                Utf8 charSequence584;
+                Object oldString584 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(584);
+                if (oldString584 instanceof Utf8) {
+                    charSequence584 = (decoder).readString(((Utf8) oldString584));
+                } else {
+                    charSequence584 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, charSequence584);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F584': "+ unionIndex584));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex585 = (decoder.readIndex());
+        if (unionIndex585 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, null);
+        } else {
+            if (unionIndex585 == 1) {
+                Utf8 charSequence585;
+                Object oldString585 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(585);
+                if (oldString585 instanceof Utf8) {
+                    charSequence585 = (decoder).readString(((Utf8) oldString585));
+                } else {
+                    charSequence585 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, charSequence585);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F585': "+ unionIndex585));
+            }
+        }
+        int unionIndex586 = (decoder.readIndex());
+        if (unionIndex586 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, null);
+        } else {
+            if (unionIndex586 == 1) {
+                Utf8 charSequence586;
+                Object oldString586 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(586);
+                if (oldString586 instanceof Utf8) {
+                    charSequence586 = (decoder).readString(((Utf8) oldString586));
+                } else {
+                    charSequence586 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, charSequence586);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F586': "+ unionIndex586));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex587 = (decoder.readIndex());
+        if (unionIndex587 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, null);
+        } else {
+            if (unionIndex587 == 1) {
+                Utf8 charSequence587;
+                Object oldString587 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(587);
+                if (oldString587 instanceof Utf8) {
+                    charSequence587 = (decoder).readString(((Utf8) oldString587));
+                } else {
+                    charSequence587 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, charSequence587);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F587': "+ unionIndex587));
+            }
+        }
+        int unionIndex588 = (decoder.readIndex());
+        if (unionIndex588 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, null);
+        } else {
+            if (unionIndex588 == 1) {
+                Utf8 charSequence588;
+                Object oldString588 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(588);
+                if (oldString588 instanceof Utf8) {
+                    charSequence588 = (decoder).readString(((Utf8) oldString588));
+                } else {
+                    charSequence588 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, charSequence588);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F588': "+ unionIndex588));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex589 = (decoder.readIndex());
+        if (unionIndex589 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, null);
+        } else {
+            if (unionIndex589 == 1) {
+                Utf8 charSequence589;
+                Object oldString589 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(589);
+                if (oldString589 instanceof Utf8) {
+                    charSequence589 = (decoder).readString(((Utf8) oldString589));
+                } else {
+                    charSequence589 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, charSequence589);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F589': "+ unionIndex589));
+            }
+        }
+        int unionIndex590 = (decoder.readIndex());
+        if (unionIndex590 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, null);
+        } else {
+            if (unionIndex590 == 1) {
+                Utf8 charSequence590;
+                Object oldString590 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(590);
+                if (oldString590 instanceof Utf8) {
+                    charSequence590 = (decoder).readString(((Utf8) oldString590));
+                } else {
+                    charSequence590 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, charSequence590);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F590': "+ unionIndex590));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex591 = (decoder.readIndex());
+        if (unionIndex591 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, null);
+        } else {
+            if (unionIndex591 == 1) {
+                Utf8 charSequence591;
+                Object oldString591 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(591);
+                if (oldString591 instanceof Utf8) {
+                    charSequence591 = (decoder).readString(((Utf8) oldString591));
+                } else {
+                    charSequence591 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, charSequence591);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F591': "+ unionIndex591));
+            }
+        }
+        int unionIndex592 = (decoder.readIndex());
+        if (unionIndex592 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, null);
+        } else {
+            if (unionIndex592 == 1) {
+                Utf8 charSequence592;
+                Object oldString592 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(592);
+                if (oldString592 instanceof Utf8) {
+                    charSequence592 = (decoder).readString(((Utf8) oldString592));
+                } else {
+                    charSequence592 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, charSequence592);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F592': "+ unionIndex592));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex593 = (decoder.readIndex());
+        if (unionIndex593 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, null);
+        } else {
+            if (unionIndex593 == 1) {
+                Utf8 charSequence593;
+                Object oldString593 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(593);
+                if (oldString593 instanceof Utf8) {
+                    charSequence593 = (decoder).readString(((Utf8) oldString593));
+                } else {
+                    charSequence593 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, charSequence593);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F593': "+ unionIndex593));
+            }
+        }
+        int unionIndex594 = (decoder.readIndex());
+        if (unionIndex594 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, null);
+        } else {
+            if (unionIndex594 == 1) {
+                Utf8 charSequence594;
+                Object oldString594 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(594);
+                if (oldString594 instanceof Utf8) {
+                    charSequence594 = (decoder).readString(((Utf8) oldString594));
+                } else {
+                    charSequence594 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, charSequence594);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F594': "+ unionIndex594));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex595 = (decoder.readIndex());
+        if (unionIndex595 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, null);
+        } else {
+            if (unionIndex595 == 1) {
+                Utf8 charSequence595;
+                Object oldString595 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(595);
+                if (oldString595 instanceof Utf8) {
+                    charSequence595 = (decoder).readString(((Utf8) oldString595));
+                } else {
+                    charSequence595 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, charSequence595);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F595': "+ unionIndex595));
+            }
+        }
+        int unionIndex596 = (decoder.readIndex());
+        if (unionIndex596 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, null);
+        } else {
+            if (unionIndex596 == 1) {
+                Utf8 charSequence596;
+                Object oldString596 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(596);
+                if (oldString596 instanceof Utf8) {
+                    charSequence596 = (decoder).readString(((Utf8) oldString596));
+                } else {
+                    charSequence596 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, charSequence596);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F596': "+ unionIndex596));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex597 = (decoder.readIndex());
+        if (unionIndex597 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, null);
+        } else {
+            if (unionIndex597 == 1) {
+                Utf8 charSequence597;
+                Object oldString597 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(597);
+                if (oldString597 instanceof Utf8) {
+                    charSequence597 = (decoder).readString(((Utf8) oldString597));
+                } else {
+                    charSequence597 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, charSequence597);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F597': "+ unionIndex597));
+            }
+        }
+        int unionIndex598 = (decoder.readIndex());
+        if (unionIndex598 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, null);
+        } else {
+            if (unionIndex598 == 1) {
+                Utf8 charSequence598;
+                Object oldString598 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(598);
+                if (oldString598 instanceof Utf8) {
+                    charSequence598 = (decoder).readString(((Utf8) oldString598));
+                } else {
+                    charSequence598 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, charSequence598);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F598': "+ unionIndex598));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex599 = (decoder.readIndex());
+        if (unionIndex599 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, null);
+        } else {
+            if (unionIndex599 == 1) {
+                Utf8 charSequence599;
+                Object oldString599 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(599);
+                if (oldString599 instanceof Utf8) {
+                    charSequence599 = (decoder).readString(((Utf8) oldString599));
+                } else {
+                    charSequence599 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, charSequence599);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F599': "+ unionIndex599));
+            }
+        }
+        int unionIndex600 = (decoder.readIndex());
+        if (unionIndex600 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, null);
+        } else {
+            if (unionIndex600 == 1) {
+                Utf8 charSequence600;
+                Object oldString600 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(600);
+                if (oldString600 instanceof Utf8) {
+                    charSequence600 = (decoder).readString(((Utf8) oldString600));
+                } else {
+                    charSequence600 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, charSequence600);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F600': "+ unionIndex600));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex601 = (decoder.readIndex());
+        if (unionIndex601 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, null);
+        } else {
+            if (unionIndex601 == 1) {
+                Utf8 charSequence601;
+                Object oldString601 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(601);
+                if (oldString601 instanceof Utf8) {
+                    charSequence601 = (decoder).readString(((Utf8) oldString601));
+                } else {
+                    charSequence601 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, charSequence601);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F601': "+ unionIndex601));
+            }
+        }
+        int unionIndex602 = (decoder.readIndex());
+        if (unionIndex602 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, null);
+        } else {
+            if (unionIndex602 == 1) {
+                Utf8 charSequence602;
+                Object oldString602 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(602);
+                if (oldString602 instanceof Utf8) {
+                    charSequence602 = (decoder).readString(((Utf8) oldString602));
+                } else {
+                    charSequence602 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, charSequence602);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F602': "+ unionIndex602));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex603 = (decoder.readIndex());
+        if (unionIndex603 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, null);
+        } else {
+            if (unionIndex603 == 1) {
+                Utf8 charSequence603;
+                Object oldString603 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(603);
+                if (oldString603 instanceof Utf8) {
+                    charSequence603 = (decoder).readString(((Utf8) oldString603));
+                } else {
+                    charSequence603 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, charSequence603);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F603': "+ unionIndex603));
+            }
+        }
+        int unionIndex604 = (decoder.readIndex());
+        if (unionIndex604 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, null);
+        } else {
+            if (unionIndex604 == 1) {
+                Utf8 charSequence604;
+                Object oldString604 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(604);
+                if (oldString604 instanceof Utf8) {
+                    charSequence604 = (decoder).readString(((Utf8) oldString604));
+                } else {
+                    charSequence604 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, charSequence604);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F604': "+ unionIndex604));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex605 = (decoder.readIndex());
+        if (unionIndex605 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, null);
+        } else {
+            if (unionIndex605 == 1) {
+                Utf8 charSequence605;
+                Object oldString605 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(605);
+                if (oldString605 instanceof Utf8) {
+                    charSequence605 = (decoder).readString(((Utf8) oldString605));
+                } else {
+                    charSequence605 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, charSequence605);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F605': "+ unionIndex605));
+            }
+        }
+        int unionIndex606 = (decoder.readIndex());
+        if (unionIndex606 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, null);
+        } else {
+            if (unionIndex606 == 1) {
+                Utf8 charSequence606;
+                Object oldString606 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(606);
+                if (oldString606 instanceof Utf8) {
+                    charSequence606 = (decoder).readString(((Utf8) oldString606));
+                } else {
+                    charSequence606 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, charSequence606);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F606': "+ unionIndex606));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex607 = (decoder.readIndex());
+        if (unionIndex607 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, null);
+        } else {
+            if (unionIndex607 == 1) {
+                Utf8 charSequence607;
+                Object oldString607 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(607);
+                if (oldString607 instanceof Utf8) {
+                    charSequence607 = (decoder).readString(((Utf8) oldString607));
+                } else {
+                    charSequence607 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, charSequence607);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F607': "+ unionIndex607));
+            }
+        }
+        int unionIndex608 = (decoder.readIndex());
+        if (unionIndex608 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, null);
+        } else {
+            if (unionIndex608 == 1) {
+                Utf8 charSequence608;
+                Object oldString608 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(608);
+                if (oldString608 instanceof Utf8) {
+                    charSequence608 = (decoder).readString(((Utf8) oldString608));
+                } else {
+                    charSequence608 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, charSequence608);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F608': "+ unionIndex608));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex609 = (decoder.readIndex());
+        if (unionIndex609 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, null);
+        } else {
+            if (unionIndex609 == 1) {
+                Utf8 charSequence609;
+                Object oldString609 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(609);
+                if (oldString609 instanceof Utf8) {
+                    charSequence609 = (decoder).readString(((Utf8) oldString609));
+                } else {
+                    charSequence609 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, charSequence609);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F609': "+ unionIndex609));
+            }
+        }
+        int unionIndex610 = (decoder.readIndex());
+        if (unionIndex610 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, null);
+        } else {
+            if (unionIndex610 == 1) {
+                Utf8 charSequence610;
+                Object oldString610 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(610);
+                if (oldString610 instanceof Utf8) {
+                    charSequence610 = (decoder).readString(((Utf8) oldString610));
+                } else {
+                    charSequence610 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, charSequence610);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F610': "+ unionIndex610));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex611 = (decoder.readIndex());
+        if (unionIndex611 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, null);
+        } else {
+            if (unionIndex611 == 1) {
+                Utf8 charSequence611;
+                Object oldString611 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(611);
+                if (oldString611 instanceof Utf8) {
+                    charSequence611 = (decoder).readString(((Utf8) oldString611));
+                } else {
+                    charSequence611 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, charSequence611);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F611': "+ unionIndex611));
+            }
+        }
+        int unionIndex612 = (decoder.readIndex());
+        if (unionIndex612 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, null);
+        } else {
+            if (unionIndex612 == 1) {
+                Utf8 charSequence612;
+                Object oldString612 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(612);
+                if (oldString612 instanceof Utf8) {
+                    charSequence612 = (decoder).readString(((Utf8) oldString612));
+                } else {
+                    charSequence612 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, charSequence612);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F612': "+ unionIndex612));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex613 = (decoder.readIndex());
+        if (unionIndex613 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, null);
+        } else {
+            if (unionIndex613 == 1) {
+                Utf8 charSequence613;
+                Object oldString613 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(613);
+                if (oldString613 instanceof Utf8) {
+                    charSequence613 = (decoder).readString(((Utf8) oldString613));
+                } else {
+                    charSequence613 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, charSequence613);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F613': "+ unionIndex613));
+            }
+        }
+        int unionIndex614 = (decoder.readIndex());
+        if (unionIndex614 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, null);
+        } else {
+            if (unionIndex614 == 1) {
+                Utf8 charSequence614;
+                Object oldString614 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(614);
+                if (oldString614 instanceof Utf8) {
+                    charSequence614 = (decoder).readString(((Utf8) oldString614));
+                } else {
+                    charSequence614 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, charSequence614);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F614': "+ unionIndex614));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex615 = (decoder.readIndex());
+        if (unionIndex615 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, null);
+        } else {
+            if (unionIndex615 == 1) {
+                Utf8 charSequence615;
+                Object oldString615 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(615);
+                if (oldString615 instanceof Utf8) {
+                    charSequence615 = (decoder).readString(((Utf8) oldString615));
+                } else {
+                    charSequence615 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, charSequence615);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F615': "+ unionIndex615));
+            }
+        }
+        int unionIndex616 = (decoder.readIndex());
+        if (unionIndex616 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, null);
+        } else {
+            if (unionIndex616 == 1) {
+                Utf8 charSequence616;
+                Object oldString616 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(616);
+                if (oldString616 instanceof Utf8) {
+                    charSequence616 = (decoder).readString(((Utf8) oldString616));
+                } else {
+                    charSequence616 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, charSequence616);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F616': "+ unionIndex616));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex617 = (decoder.readIndex());
+        if (unionIndex617 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, null);
+        } else {
+            if (unionIndex617 == 1) {
+                Utf8 charSequence617;
+                Object oldString617 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(617);
+                if (oldString617 instanceof Utf8) {
+                    charSequence617 = (decoder).readString(((Utf8) oldString617));
+                } else {
+                    charSequence617 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, charSequence617);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F617': "+ unionIndex617));
+            }
+        }
+        int unionIndex618 = (decoder.readIndex());
+        if (unionIndex618 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, null);
+        } else {
+            if (unionIndex618 == 1) {
+                Utf8 charSequence618;
+                Object oldString618 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(618);
+                if (oldString618 instanceof Utf8) {
+                    charSequence618 = (decoder).readString(((Utf8) oldString618));
+                } else {
+                    charSequence618 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, charSequence618);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F618': "+ unionIndex618));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex619 = (decoder.readIndex());
+        if (unionIndex619 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, null);
+        } else {
+            if (unionIndex619 == 1) {
+                Utf8 charSequence619;
+                Object oldString619 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(619);
+                if (oldString619 instanceof Utf8) {
+                    charSequence619 = (decoder).readString(((Utf8) oldString619));
+                } else {
+                    charSequence619 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, charSequence619);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F619': "+ unionIndex619));
+            }
+        }
+        int unionIndex620 = (decoder.readIndex());
+        if (unionIndex620 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, null);
+        } else {
+            if (unionIndex620 == 1) {
+                Utf8 charSequence620;
+                Object oldString620 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(620);
+                if (oldString620 instanceof Utf8) {
+                    charSequence620 = (decoder).readString(((Utf8) oldString620));
+                } else {
+                    charSequence620 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, charSequence620);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F620': "+ unionIndex620));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex621 = (decoder.readIndex());
+        if (unionIndex621 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, null);
+        } else {
+            if (unionIndex621 == 1) {
+                Utf8 charSequence621;
+                Object oldString621 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(621);
+                if (oldString621 instanceof Utf8) {
+                    charSequence621 = (decoder).readString(((Utf8) oldString621));
+                } else {
+                    charSequence621 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, charSequence621);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F621': "+ unionIndex621));
+            }
+        }
+        int unionIndex622 = (decoder.readIndex());
+        if (unionIndex622 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, null);
+        } else {
+            if (unionIndex622 == 1) {
+                Utf8 charSequence622;
+                Object oldString622 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(622);
+                if (oldString622 instanceof Utf8) {
+                    charSequence622 = (decoder).readString(((Utf8) oldString622));
+                } else {
+                    charSequence622 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, charSequence622);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F622': "+ unionIndex622));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex623 = (decoder.readIndex());
+        if (unionIndex623 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, null);
+        } else {
+            if (unionIndex623 == 1) {
+                Utf8 charSequence623;
+                Object oldString623 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(623);
+                if (oldString623 instanceof Utf8) {
+                    charSequence623 = (decoder).readString(((Utf8) oldString623));
+                } else {
+                    charSequence623 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, charSequence623);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F623': "+ unionIndex623));
+            }
+        }
+        int unionIndex624 = (decoder.readIndex());
+        if (unionIndex624 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, null);
+        } else {
+            if (unionIndex624 == 1) {
+                Utf8 charSequence624;
+                Object oldString624 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(624);
+                if (oldString624 instanceof Utf8) {
+                    charSequence624 = (decoder).readString(((Utf8) oldString624));
+                } else {
+                    charSequence624 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, charSequence624);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F624': "+ unionIndex624));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex625 = (decoder.readIndex());
+        if (unionIndex625 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, null);
+        } else {
+            if (unionIndex625 == 1) {
+                Utf8 charSequence625;
+                Object oldString625 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(625);
+                if (oldString625 instanceof Utf8) {
+                    charSequence625 = (decoder).readString(((Utf8) oldString625));
+                } else {
+                    charSequence625 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, charSequence625);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F625': "+ unionIndex625));
+            }
+        }
+        int unionIndex626 = (decoder.readIndex());
+        if (unionIndex626 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, null);
+        } else {
+            if (unionIndex626 == 1) {
+                Utf8 charSequence626;
+                Object oldString626 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(626);
+                if (oldString626 instanceof Utf8) {
+                    charSequence626 = (decoder).readString(((Utf8) oldString626));
+                } else {
+                    charSequence626 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, charSequence626);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F626': "+ unionIndex626));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex627 = (decoder.readIndex());
+        if (unionIndex627 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, null);
+        } else {
+            if (unionIndex627 == 1) {
+                Utf8 charSequence627;
+                Object oldString627 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(627);
+                if (oldString627 instanceof Utf8) {
+                    charSequence627 = (decoder).readString(((Utf8) oldString627));
+                } else {
+                    charSequence627 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, charSequence627);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F627': "+ unionIndex627));
+            }
+        }
+        int unionIndex628 = (decoder.readIndex());
+        if (unionIndex628 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, null);
+        } else {
+            if (unionIndex628 == 1) {
+                Utf8 charSequence628;
+                Object oldString628 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(628);
+                if (oldString628 instanceof Utf8) {
+                    charSequence628 = (decoder).readString(((Utf8) oldString628));
+                } else {
+                    charSequence628 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, charSequence628);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F628': "+ unionIndex628));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex629 = (decoder.readIndex());
+        if (unionIndex629 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, null);
+        } else {
+            if (unionIndex629 == 1) {
+                Utf8 charSequence629;
+                Object oldString629 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(629);
+                if (oldString629 instanceof Utf8) {
+                    charSequence629 = (decoder).readString(((Utf8) oldString629));
+                } else {
+                    charSequence629 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, charSequence629);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F629': "+ unionIndex629));
+            }
+        }
+        int unionIndex630 = (decoder.readIndex());
+        if (unionIndex630 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, null);
+        } else {
+            if (unionIndex630 == 1) {
+                Utf8 charSequence630;
+                Object oldString630 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(630);
+                if (oldString630 instanceof Utf8) {
+                    charSequence630 = (decoder).readString(((Utf8) oldString630));
+                } else {
+                    charSequence630 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, charSequence630);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F630': "+ unionIndex630));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex631 = (decoder.readIndex());
+        if (unionIndex631 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, null);
+        } else {
+            if (unionIndex631 == 1) {
+                Utf8 charSequence631;
+                Object oldString631 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(631);
+                if (oldString631 instanceof Utf8) {
+                    charSequence631 = (decoder).readString(((Utf8) oldString631));
+                } else {
+                    charSequence631 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, charSequence631);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F631': "+ unionIndex631));
+            }
+        }
+        int unionIndex632 = (decoder.readIndex());
+        if (unionIndex632 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, null);
+        } else {
+            if (unionIndex632 == 1) {
+                Utf8 charSequence632;
+                Object oldString632 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(632);
+                if (oldString632 instanceof Utf8) {
+                    charSequence632 = (decoder).readString(((Utf8) oldString632));
+                } else {
+                    charSequence632 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, charSequence632);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F632': "+ unionIndex632));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex633 = (decoder.readIndex());
+        if (unionIndex633 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, null);
+        } else {
+            if (unionIndex633 == 1) {
+                Utf8 charSequence633;
+                Object oldString633 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(633);
+                if (oldString633 instanceof Utf8) {
+                    charSequence633 = (decoder).readString(((Utf8) oldString633));
+                } else {
+                    charSequence633 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, charSequence633);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F633': "+ unionIndex633));
+            }
+        }
+        int unionIndex634 = (decoder.readIndex());
+        if (unionIndex634 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, null);
+        } else {
+            if (unionIndex634 == 1) {
+                Utf8 charSequence634;
+                Object oldString634 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(634);
+                if (oldString634 instanceof Utf8) {
+                    charSequence634 = (decoder).readString(((Utf8) oldString634));
+                } else {
+                    charSequence634 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, charSequence634);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F634': "+ unionIndex634));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex635 = (decoder.readIndex());
+        if (unionIndex635 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, null);
+        } else {
+            if (unionIndex635 == 1) {
+                Utf8 charSequence635;
+                Object oldString635 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(635);
+                if (oldString635 instanceof Utf8) {
+                    charSequence635 = (decoder).readString(((Utf8) oldString635));
+                } else {
+                    charSequence635 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, charSequence635);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F635': "+ unionIndex635));
+            }
+        }
+        int unionIndex636 = (decoder.readIndex());
+        if (unionIndex636 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, null);
+        } else {
+            if (unionIndex636 == 1) {
+                Utf8 charSequence636;
+                Object oldString636 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(636);
+                if (oldString636 instanceof Utf8) {
+                    charSequence636 = (decoder).readString(((Utf8) oldString636));
+                } else {
+                    charSequence636 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, charSequence636);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F636': "+ unionIndex636));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex637 = (decoder.readIndex());
+        if (unionIndex637 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, null);
+        } else {
+            if (unionIndex637 == 1) {
+                Utf8 charSequence637;
+                Object oldString637 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(637);
+                if (oldString637 instanceof Utf8) {
+                    charSequence637 = (decoder).readString(((Utf8) oldString637));
+                } else {
+                    charSequence637 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, charSequence637);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F637': "+ unionIndex637));
+            }
+        }
+        int unionIndex638 = (decoder.readIndex());
+        if (unionIndex638 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, null);
+        } else {
+            if (unionIndex638 == 1) {
+                Utf8 charSequence638;
+                Object oldString638 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(638);
+                if (oldString638 instanceof Utf8) {
+                    charSequence638 = (decoder).readString(((Utf8) oldString638));
+                } else {
+                    charSequence638 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, charSequence638);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F638': "+ unionIndex638));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex639 = (decoder.readIndex());
+        if (unionIndex639 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, null);
+        } else {
+            if (unionIndex639 == 1) {
+                Utf8 charSequence639;
+                Object oldString639 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(639);
+                if (oldString639 instanceof Utf8) {
+                    charSequence639 = (decoder).readString(((Utf8) oldString639));
+                } else {
+                    charSequence639 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, charSequence639);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F639': "+ unionIndex639));
+            }
+        }
+        int unionIndex640 = (decoder.readIndex());
+        if (unionIndex640 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, null);
+        } else {
+            if (unionIndex640 == 1) {
+                Utf8 charSequence640;
+                Object oldString640 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(640);
+                if (oldString640 instanceof Utf8) {
+                    charSequence640 = (decoder).readString(((Utf8) oldString640));
+                } else {
+                    charSequence640 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, charSequence640);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F640': "+ unionIndex640));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex641 = (decoder.readIndex());
+        if (unionIndex641 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, null);
+        } else {
+            if (unionIndex641 == 1) {
+                Utf8 charSequence641;
+                Object oldString641 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(641);
+                if (oldString641 instanceof Utf8) {
+                    charSequence641 = (decoder).readString(((Utf8) oldString641));
+                } else {
+                    charSequence641 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, charSequence641);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F641': "+ unionIndex641));
+            }
+        }
+        int unionIndex642 = (decoder.readIndex());
+        if (unionIndex642 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, null);
+        } else {
+            if (unionIndex642 == 1) {
+                Utf8 charSequence642;
+                Object oldString642 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(642);
+                if (oldString642 instanceof Utf8) {
+                    charSequence642 = (decoder).readString(((Utf8) oldString642));
+                } else {
+                    charSequence642 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, charSequence642);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F642': "+ unionIndex642));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex643 = (decoder.readIndex());
+        if (unionIndex643 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, null);
+        } else {
+            if (unionIndex643 == 1) {
+                Utf8 charSequence643;
+                Object oldString643 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(643);
+                if (oldString643 instanceof Utf8) {
+                    charSequence643 = (decoder).readString(((Utf8) oldString643));
+                } else {
+                    charSequence643 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, charSequence643);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F643': "+ unionIndex643));
+            }
+        }
+        int unionIndex644 = (decoder.readIndex());
+        if (unionIndex644 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, null);
+        } else {
+            if (unionIndex644 == 1) {
+                Utf8 charSequence644;
+                Object oldString644 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(644);
+                if (oldString644 instanceof Utf8) {
+                    charSequence644 = (decoder).readString(((Utf8) oldString644));
+                } else {
+                    charSequence644 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, charSequence644);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F644': "+ unionIndex644));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex645 = (decoder.readIndex());
+        if (unionIndex645 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, null);
+        } else {
+            if (unionIndex645 == 1) {
+                Utf8 charSequence645;
+                Object oldString645 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(645);
+                if (oldString645 instanceof Utf8) {
+                    charSequence645 = (decoder).readString(((Utf8) oldString645));
+                } else {
+                    charSequence645 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, charSequence645);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F645': "+ unionIndex645));
+            }
+        }
+        int unionIndex646 = (decoder.readIndex());
+        if (unionIndex646 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, null);
+        } else {
+            if (unionIndex646 == 1) {
+                Utf8 charSequence646;
+                Object oldString646 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(646);
+                if (oldString646 instanceof Utf8) {
+                    charSequence646 = (decoder).readString(((Utf8) oldString646));
+                } else {
+                    charSequence646 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, charSequence646);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F646': "+ unionIndex646));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex647 = (decoder.readIndex());
+        if (unionIndex647 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, null);
+        } else {
+            if (unionIndex647 == 1) {
+                Utf8 charSequence647;
+                Object oldString647 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(647);
+                if (oldString647 instanceof Utf8) {
+                    charSequence647 = (decoder).readString(((Utf8) oldString647));
+                } else {
+                    charSequence647 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, charSequence647);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F647': "+ unionIndex647));
+            }
+        }
+        int unionIndex648 = (decoder.readIndex());
+        if (unionIndex648 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, null);
+        } else {
+            if (unionIndex648 == 1) {
+                Utf8 charSequence648;
+                Object oldString648 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(648);
+                if (oldString648 instanceof Utf8) {
+                    charSequence648 = (decoder).readString(((Utf8) oldString648));
+                } else {
+                    charSequence648 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, charSequence648);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F648': "+ unionIndex648));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex649 = (decoder.readIndex());
+        if (unionIndex649 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, null);
+        } else {
+            if (unionIndex649 == 1) {
+                Utf8 charSequence649;
+                Object oldString649 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(649);
+                if (oldString649 instanceof Utf8) {
+                    charSequence649 = (decoder).readString(((Utf8) oldString649));
+                } else {
+                    charSequence649 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, charSequence649);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F649': "+ unionIndex649));
+            }
+        }
+        int unionIndex650 = (decoder.readIndex());
+        if (unionIndex650 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, null);
+        } else {
+            if (unionIndex650 == 1) {
+                Utf8 charSequence650;
+                Object oldString650 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(650);
+                if (oldString650 instanceof Utf8) {
+                    charSequence650 = (decoder).readString(((Utf8) oldString650));
+                } else {
+                    charSequence650 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, charSequence650);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F650': "+ unionIndex650));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex651 = (decoder.readIndex());
+        if (unionIndex651 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, null);
+        } else {
+            if (unionIndex651 == 1) {
+                Utf8 charSequence651;
+                Object oldString651 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(651);
+                if (oldString651 instanceof Utf8) {
+                    charSequence651 = (decoder).readString(((Utf8) oldString651));
+                } else {
+                    charSequence651 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, charSequence651);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F651': "+ unionIndex651));
+            }
+        }
+        int unionIndex652 = (decoder.readIndex());
+        if (unionIndex652 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, null);
+        } else {
+            if (unionIndex652 == 1) {
+                Utf8 charSequence652;
+                Object oldString652 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(652);
+                if (oldString652 instanceof Utf8) {
+                    charSequence652 = (decoder).readString(((Utf8) oldString652));
+                } else {
+                    charSequence652 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, charSequence652);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F652': "+ unionIndex652));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex653 = (decoder.readIndex());
+        if (unionIndex653 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, null);
+        } else {
+            if (unionIndex653 == 1) {
+                Utf8 charSequence653;
+                Object oldString653 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(653);
+                if (oldString653 instanceof Utf8) {
+                    charSequence653 = (decoder).readString(((Utf8) oldString653));
+                } else {
+                    charSequence653 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, charSequence653);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F653': "+ unionIndex653));
+            }
+        }
+        int unionIndex654 = (decoder.readIndex());
+        if (unionIndex654 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, null);
+        } else {
+            if (unionIndex654 == 1) {
+                Utf8 charSequence654;
+                Object oldString654 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(654);
+                if (oldString654 instanceof Utf8) {
+                    charSequence654 = (decoder).readString(((Utf8) oldString654));
+                } else {
+                    charSequence654 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, charSequence654);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F654': "+ unionIndex654));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex655 = (decoder.readIndex());
+        if (unionIndex655 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, null);
+        } else {
+            if (unionIndex655 == 1) {
+                Utf8 charSequence655;
+                Object oldString655 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(655);
+                if (oldString655 instanceof Utf8) {
+                    charSequence655 = (decoder).readString(((Utf8) oldString655));
+                } else {
+                    charSequence655 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, charSequence655);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F655': "+ unionIndex655));
+            }
+        }
+        int unionIndex656 = (decoder.readIndex());
+        if (unionIndex656 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, null);
+        } else {
+            if (unionIndex656 == 1) {
+                Utf8 charSequence656;
+                Object oldString656 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(656);
+                if (oldString656 instanceof Utf8) {
+                    charSequence656 = (decoder).readString(((Utf8) oldString656));
+                } else {
+                    charSequence656 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, charSequence656);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F656': "+ unionIndex656));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex657 = (decoder.readIndex());
+        if (unionIndex657 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, null);
+        } else {
+            if (unionIndex657 == 1) {
+                Utf8 charSequence657;
+                Object oldString657 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(657);
+                if (oldString657 instanceof Utf8) {
+                    charSequence657 = (decoder).readString(((Utf8) oldString657));
+                } else {
+                    charSequence657 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, charSequence657);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F657': "+ unionIndex657));
+            }
+        }
+        int unionIndex658 = (decoder.readIndex());
+        if (unionIndex658 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, null);
+        } else {
+            if (unionIndex658 == 1) {
+                Utf8 charSequence658;
+                Object oldString658 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(658);
+                if (oldString658 instanceof Utf8) {
+                    charSequence658 = (decoder).readString(((Utf8) oldString658));
+                } else {
+                    charSequence658 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, charSequence658);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F658': "+ unionIndex658));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex659 = (decoder.readIndex());
+        if (unionIndex659 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, null);
+        } else {
+            if (unionIndex659 == 1) {
+                Utf8 charSequence659;
+                Object oldString659 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(659);
+                if (oldString659 instanceof Utf8) {
+                    charSequence659 = (decoder).readString(((Utf8) oldString659));
+                } else {
+                    charSequence659 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, charSequence659);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F659': "+ unionIndex659));
+            }
+        }
+        int unionIndex660 = (decoder.readIndex());
+        if (unionIndex660 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, null);
+        } else {
+            if (unionIndex660 == 1) {
+                Utf8 charSequence660;
+                Object oldString660 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(660);
+                if (oldString660 instanceof Utf8) {
+                    charSequence660 = (decoder).readString(((Utf8) oldString660));
+                } else {
+                    charSequence660 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, charSequence660);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F660': "+ unionIndex660));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex661 = (decoder.readIndex());
+        if (unionIndex661 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, null);
+        } else {
+            if (unionIndex661 == 1) {
+                Utf8 charSequence661;
+                Object oldString661 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(661);
+                if (oldString661 instanceof Utf8) {
+                    charSequence661 = (decoder).readString(((Utf8) oldString661));
+                } else {
+                    charSequence661 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, charSequence661);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F661': "+ unionIndex661));
+            }
+        }
+        int unionIndex662 = (decoder.readIndex());
+        if (unionIndex662 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, null);
+        } else {
+            if (unionIndex662 == 1) {
+                Utf8 charSequence662;
+                Object oldString662 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(662);
+                if (oldString662 instanceof Utf8) {
+                    charSequence662 = (decoder).readString(((Utf8) oldString662));
+                } else {
+                    charSequence662 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, charSequence662);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F662': "+ unionIndex662));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex663 = (decoder.readIndex());
+        if (unionIndex663 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, null);
+        } else {
+            if (unionIndex663 == 1) {
+                Utf8 charSequence663;
+                Object oldString663 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(663);
+                if (oldString663 instanceof Utf8) {
+                    charSequence663 = (decoder).readString(((Utf8) oldString663));
+                } else {
+                    charSequence663 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, charSequence663);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F663': "+ unionIndex663));
+            }
+        }
+        int unionIndex664 = (decoder.readIndex());
+        if (unionIndex664 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, null);
+        } else {
+            if (unionIndex664 == 1) {
+                Utf8 charSequence664;
+                Object oldString664 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(664);
+                if (oldString664 instanceof Utf8) {
+                    charSequence664 = (decoder).readString(((Utf8) oldString664));
+                } else {
+                    charSequence664 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, charSequence664);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F664': "+ unionIndex664));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex665 = (decoder.readIndex());
+        if (unionIndex665 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, null);
+        } else {
+            if (unionIndex665 == 1) {
+                Utf8 charSequence665;
+                Object oldString665 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(665);
+                if (oldString665 instanceof Utf8) {
+                    charSequence665 = (decoder).readString(((Utf8) oldString665));
+                } else {
+                    charSequence665 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, charSequence665);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F665': "+ unionIndex665));
+            }
+        }
+        int unionIndex666 = (decoder.readIndex());
+        if (unionIndex666 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, null);
+        } else {
+            if (unionIndex666 == 1) {
+                Utf8 charSequence666;
+                Object oldString666 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(666);
+                if (oldString666 instanceof Utf8) {
+                    charSequence666 = (decoder).readString(((Utf8) oldString666));
+                } else {
+                    charSequence666 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, charSequence666);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F666': "+ unionIndex666));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex667 = (decoder.readIndex());
+        if (unionIndex667 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, null);
+        } else {
+            if (unionIndex667 == 1) {
+                Utf8 charSequence667;
+                Object oldString667 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(667);
+                if (oldString667 instanceof Utf8) {
+                    charSequence667 = (decoder).readString(((Utf8) oldString667));
+                } else {
+                    charSequence667 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, charSequence667);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F667': "+ unionIndex667));
+            }
+        }
+        int unionIndex668 = (decoder.readIndex());
+        if (unionIndex668 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, null);
+        } else {
+            if (unionIndex668 == 1) {
+                Utf8 charSequence668;
+                Object oldString668 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(668);
+                if (oldString668 instanceof Utf8) {
+                    charSequence668 = (decoder).readString(((Utf8) oldString668));
+                } else {
+                    charSequence668 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, charSequence668);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F668': "+ unionIndex668));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex669 = (decoder.readIndex());
+        if (unionIndex669 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, null);
+        } else {
+            if (unionIndex669 == 1) {
+                Utf8 charSequence669;
+                Object oldString669 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(669);
+                if (oldString669 instanceof Utf8) {
+                    charSequence669 = (decoder).readString(((Utf8) oldString669));
+                } else {
+                    charSequence669 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, charSequence669);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F669': "+ unionIndex669));
+            }
+        }
+        int unionIndex670 = (decoder.readIndex());
+        if (unionIndex670 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, null);
+        } else {
+            if (unionIndex670 == 1) {
+                Utf8 charSequence670;
+                Object oldString670 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(670);
+                if (oldString670 instanceof Utf8) {
+                    charSequence670 = (decoder).readString(((Utf8) oldString670));
+                } else {
+                    charSequence670 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, charSequence670);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F670': "+ unionIndex670));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex671 = (decoder.readIndex());
+        if (unionIndex671 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, null);
+        } else {
+            if (unionIndex671 == 1) {
+                Utf8 charSequence671;
+                Object oldString671 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(671);
+                if (oldString671 instanceof Utf8) {
+                    charSequence671 = (decoder).readString(((Utf8) oldString671));
+                } else {
+                    charSequence671 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, charSequence671);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F671': "+ unionIndex671));
+            }
+        }
+        int unionIndex672 = (decoder.readIndex());
+        if (unionIndex672 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, null);
+        } else {
+            if (unionIndex672 == 1) {
+                Utf8 charSequence672;
+                Object oldString672 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(672);
+                if (oldString672 instanceof Utf8) {
+                    charSequence672 = (decoder).readString(((Utf8) oldString672));
+                } else {
+                    charSequence672 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, charSequence672);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F672': "+ unionIndex672));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex673 = (decoder.readIndex());
+        if (unionIndex673 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, null);
+        } else {
+            if (unionIndex673 == 1) {
+                Utf8 charSequence673;
+                Object oldString673 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(673);
+                if (oldString673 instanceof Utf8) {
+                    charSequence673 = (decoder).readString(((Utf8) oldString673));
+                } else {
+                    charSequence673 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, charSequence673);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F673': "+ unionIndex673));
+            }
+        }
+        int unionIndex674 = (decoder.readIndex());
+        if (unionIndex674 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, null);
+        } else {
+            if (unionIndex674 == 1) {
+                Utf8 charSequence674;
+                Object oldString674 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(674);
+                if (oldString674 instanceof Utf8) {
+                    charSequence674 = (decoder).readString(((Utf8) oldString674));
+                } else {
+                    charSequence674 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, charSequence674);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F674': "+ unionIndex674));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex675 = (decoder.readIndex());
+        if (unionIndex675 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, null);
+        } else {
+            if (unionIndex675 == 1) {
+                Utf8 charSequence675;
+                Object oldString675 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(675);
+                if (oldString675 instanceof Utf8) {
+                    charSequence675 = (decoder).readString(((Utf8) oldString675));
+                } else {
+                    charSequence675 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, charSequence675);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F675': "+ unionIndex675));
+            }
+        }
+        int unionIndex676 = (decoder.readIndex());
+        if (unionIndex676 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, null);
+        } else {
+            if (unionIndex676 == 1) {
+                Utf8 charSequence676;
+                Object oldString676 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(676);
+                if (oldString676 instanceof Utf8) {
+                    charSequence676 = (decoder).readString(((Utf8) oldString676));
+                } else {
+                    charSequence676 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, charSequence676);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F676': "+ unionIndex676));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex677 = (decoder.readIndex());
+        if (unionIndex677 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, null);
+        } else {
+            if (unionIndex677 == 1) {
+                Utf8 charSequence677;
+                Object oldString677 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(677);
+                if (oldString677 instanceof Utf8) {
+                    charSequence677 = (decoder).readString(((Utf8) oldString677));
+                } else {
+                    charSequence677 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, charSequence677);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F677': "+ unionIndex677));
+            }
+        }
+        int unionIndex678 = (decoder.readIndex());
+        if (unionIndex678 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, null);
+        } else {
+            if (unionIndex678 == 1) {
+                Utf8 charSequence678;
+                Object oldString678 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(678);
+                if (oldString678 instanceof Utf8) {
+                    charSequence678 = (decoder).readString(((Utf8) oldString678));
+                } else {
+                    charSequence678 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, charSequence678);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F678': "+ unionIndex678));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex679 = (decoder.readIndex());
+        if (unionIndex679 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, null);
+        } else {
+            if (unionIndex679 == 1) {
+                Utf8 charSequence679;
+                Object oldString679 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(679);
+                if (oldString679 instanceof Utf8) {
+                    charSequence679 = (decoder).readString(((Utf8) oldString679));
+                } else {
+                    charSequence679 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, charSequence679);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F679': "+ unionIndex679));
+            }
+        }
+        int unionIndex680 = (decoder.readIndex());
+        if (unionIndex680 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, null);
+        } else {
+            if (unionIndex680 == 1) {
+                Utf8 charSequence680;
+                Object oldString680 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(680);
+                if (oldString680 instanceof Utf8) {
+                    charSequence680 = (decoder).readString(((Utf8) oldString680));
+                } else {
+                    charSequence680 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, charSequence680);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F680': "+ unionIndex680));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex681 = (decoder.readIndex());
+        if (unionIndex681 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, null);
+        } else {
+            if (unionIndex681 == 1) {
+                Utf8 charSequence681;
+                Object oldString681 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(681);
+                if (oldString681 instanceof Utf8) {
+                    charSequence681 = (decoder).readString(((Utf8) oldString681));
+                } else {
+                    charSequence681 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, charSequence681);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F681': "+ unionIndex681));
+            }
+        }
+        int unionIndex682 = (decoder.readIndex());
+        if (unionIndex682 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, null);
+        } else {
+            if (unionIndex682 == 1) {
+                Utf8 charSequence682;
+                Object oldString682 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(682);
+                if (oldString682 instanceof Utf8) {
+                    charSequence682 = (decoder).readString(((Utf8) oldString682));
+                } else {
+                    charSequence682 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, charSequence682);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F682': "+ unionIndex682));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex683 = (decoder.readIndex());
+        if (unionIndex683 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, null);
+        } else {
+            if (unionIndex683 == 1) {
+                Utf8 charSequence683;
+                Object oldString683 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(683);
+                if (oldString683 instanceof Utf8) {
+                    charSequence683 = (decoder).readString(((Utf8) oldString683));
+                } else {
+                    charSequence683 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, charSequence683);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F683': "+ unionIndex683));
+            }
+        }
+        int unionIndex684 = (decoder.readIndex());
+        if (unionIndex684 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, null);
+        } else {
+            if (unionIndex684 == 1) {
+                Utf8 charSequence684;
+                Object oldString684 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(684);
+                if (oldString684 instanceof Utf8) {
+                    charSequence684 = (decoder).readString(((Utf8) oldString684));
+                } else {
+                    charSequence684 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, charSequence684);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F684': "+ unionIndex684));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex685 = (decoder.readIndex());
+        if (unionIndex685 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, null);
+        } else {
+            if (unionIndex685 == 1) {
+                Utf8 charSequence685;
+                Object oldString685 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(685);
+                if (oldString685 instanceof Utf8) {
+                    charSequence685 = (decoder).readString(((Utf8) oldString685));
+                } else {
+                    charSequence685 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, charSequence685);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F685': "+ unionIndex685));
+            }
+        }
+        int unionIndex686 = (decoder.readIndex());
+        if (unionIndex686 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, null);
+        } else {
+            if (unionIndex686 == 1) {
+                Utf8 charSequence686;
+                Object oldString686 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(686);
+                if (oldString686 instanceof Utf8) {
+                    charSequence686 = (decoder).readString(((Utf8) oldString686));
+                } else {
+                    charSequence686 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, charSequence686);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F686': "+ unionIndex686));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex687 = (decoder.readIndex());
+        if (unionIndex687 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, null);
+        } else {
+            if (unionIndex687 == 1) {
+                Utf8 charSequence687;
+                Object oldString687 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(687);
+                if (oldString687 instanceof Utf8) {
+                    charSequence687 = (decoder).readString(((Utf8) oldString687));
+                } else {
+                    charSequence687 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, charSequence687);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F687': "+ unionIndex687));
+            }
+        }
+        int unionIndex688 = (decoder.readIndex());
+        if (unionIndex688 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, null);
+        } else {
+            if (unionIndex688 == 1) {
+                Utf8 charSequence688;
+                Object oldString688 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(688);
+                if (oldString688 instanceof Utf8) {
+                    charSequence688 = (decoder).readString(((Utf8) oldString688));
+                } else {
+                    charSequence688 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, charSequence688);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F688': "+ unionIndex688));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex689 = (decoder.readIndex());
+        if (unionIndex689 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, null);
+        } else {
+            if (unionIndex689 == 1) {
+                Utf8 charSequence689;
+                Object oldString689 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(689);
+                if (oldString689 instanceof Utf8) {
+                    charSequence689 = (decoder).readString(((Utf8) oldString689));
+                } else {
+                    charSequence689 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, charSequence689);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F689': "+ unionIndex689));
+            }
+        }
+        int unionIndex690 = (decoder.readIndex());
+        if (unionIndex690 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, null);
+        } else {
+            if (unionIndex690 == 1) {
+                Utf8 charSequence690;
+                Object oldString690 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(690);
+                if (oldString690 instanceof Utf8) {
+                    charSequence690 = (decoder).readString(((Utf8) oldString690));
+                } else {
+                    charSequence690 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, charSequence690);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F690': "+ unionIndex690));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex691 = (decoder.readIndex());
+        if (unionIndex691 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, null);
+        } else {
+            if (unionIndex691 == 1) {
+                Utf8 charSequence691;
+                Object oldString691 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(691);
+                if (oldString691 instanceof Utf8) {
+                    charSequence691 = (decoder).readString(((Utf8) oldString691));
+                } else {
+                    charSequence691 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, charSequence691);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F691': "+ unionIndex691));
+            }
+        }
+        int unionIndex692 = (decoder.readIndex());
+        if (unionIndex692 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, null);
+        } else {
+            if (unionIndex692 == 1) {
+                Utf8 charSequence692;
+                Object oldString692 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(692);
+                if (oldString692 instanceof Utf8) {
+                    charSequence692 = (decoder).readString(((Utf8) oldString692));
+                } else {
+                    charSequence692 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, charSequence692);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F692': "+ unionIndex692));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex693 = (decoder.readIndex());
+        if (unionIndex693 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, null);
+        } else {
+            if (unionIndex693 == 1) {
+                Utf8 charSequence693;
+                Object oldString693 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(693);
+                if (oldString693 instanceof Utf8) {
+                    charSequence693 = (decoder).readString(((Utf8) oldString693));
+                } else {
+                    charSequence693 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, charSequence693);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F693': "+ unionIndex693));
+            }
+        }
+        int unionIndex694 = (decoder.readIndex());
+        if (unionIndex694 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, null);
+        } else {
+            if (unionIndex694 == 1) {
+                Utf8 charSequence694;
+                Object oldString694 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(694);
+                if (oldString694 instanceof Utf8) {
+                    charSequence694 = (decoder).readString(((Utf8) oldString694));
+                } else {
+                    charSequence694 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, charSequence694);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F694': "+ unionIndex694));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex695 = (decoder.readIndex());
+        if (unionIndex695 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, null);
+        } else {
+            if (unionIndex695 == 1) {
+                Utf8 charSequence695;
+                Object oldString695 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(695);
+                if (oldString695 instanceof Utf8) {
+                    charSequence695 = (decoder).readString(((Utf8) oldString695));
+                } else {
+                    charSequence695 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, charSequence695);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F695': "+ unionIndex695));
+            }
+        }
+        int unionIndex696 = (decoder.readIndex());
+        if (unionIndex696 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, null);
+        } else {
+            if (unionIndex696 == 1) {
+                Utf8 charSequence696;
+                Object oldString696 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(696);
+                if (oldString696 instanceof Utf8) {
+                    charSequence696 = (decoder).readString(((Utf8) oldString696));
+                } else {
+                    charSequence696 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, charSequence696);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F696': "+ unionIndex696));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex697 = (decoder.readIndex());
+        if (unionIndex697 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, null);
+        } else {
+            if (unionIndex697 == 1) {
+                Utf8 charSequence697;
+                Object oldString697 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(697);
+                if (oldString697 instanceof Utf8) {
+                    charSequence697 = (decoder).readString(((Utf8) oldString697));
+                } else {
+                    charSequence697 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, charSequence697);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F697': "+ unionIndex697));
+            }
+        }
+        int unionIndex698 = (decoder.readIndex());
+        if (unionIndex698 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, null);
+        } else {
+            if (unionIndex698 == 1) {
+                Utf8 charSequence698;
+                Object oldString698 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(698);
+                if (oldString698 instanceof Utf8) {
+                    charSequence698 = (decoder).readString(((Utf8) oldString698));
+                } else {
+                    charSequence698 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, charSequence698);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F698': "+ unionIndex698));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex699 = (decoder.readIndex());
+        if (unionIndex699 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, null);
+        } else {
+            if (unionIndex699 == 1) {
+                Utf8 charSequence699;
+                Object oldString699 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(699);
+                if (oldString699 instanceof Utf8) {
+                    charSequence699 = (decoder).readString(((Utf8) oldString699));
+                } else {
+                    charSequence699 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, charSequence699);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F699': "+ unionIndex699));
+            }
+        }
+        int unionIndex700 = (decoder.readIndex());
+        if (unionIndex700 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, null);
+        } else {
+            if (unionIndex700 == 1) {
+                Utf8 charSequence700;
+                Object oldString700 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(700);
+                if (oldString700 instanceof Utf8) {
+                    charSequence700 = (decoder).readString(((Utf8) oldString700));
+                } else {
+                    charSequence700 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, charSequence700);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F700': "+ unionIndex700));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex701 = (decoder.readIndex());
+        if (unionIndex701 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, null);
+        } else {
+            if (unionIndex701 == 1) {
+                Utf8 charSequence701;
+                Object oldString701 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(701);
+                if (oldString701 instanceof Utf8) {
+                    charSequence701 = (decoder).readString(((Utf8) oldString701));
+                } else {
+                    charSequence701 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, charSequence701);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F701': "+ unionIndex701));
+            }
+        }
+        int unionIndex702 = (decoder.readIndex());
+        if (unionIndex702 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, null);
+        } else {
+            if (unionIndex702 == 1) {
+                Utf8 charSequence702;
+                Object oldString702 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(702);
+                if (oldString702 instanceof Utf8) {
+                    charSequence702 = (decoder).readString(((Utf8) oldString702));
+                } else {
+                    charSequence702 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, charSequence702);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F702': "+ unionIndex702));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex703 = (decoder.readIndex());
+        if (unionIndex703 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, null);
+        } else {
+            if (unionIndex703 == 1) {
+                Utf8 charSequence703;
+                Object oldString703 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(703);
+                if (oldString703 instanceof Utf8) {
+                    charSequence703 = (decoder).readString(((Utf8) oldString703));
+                } else {
+                    charSequence703 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, charSequence703);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F703': "+ unionIndex703));
+            }
+        }
+        int unionIndex704 = (decoder.readIndex());
+        if (unionIndex704 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, null);
+        } else {
+            if (unionIndex704 == 1) {
+                Utf8 charSequence704;
+                Object oldString704 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(704);
+                if (oldString704 instanceof Utf8) {
+                    charSequence704 = (decoder).readString(((Utf8) oldString704));
+                } else {
+                    charSequence704 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, charSequence704);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F704': "+ unionIndex704));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex705 = (decoder.readIndex());
+        if (unionIndex705 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, null);
+        } else {
+            if (unionIndex705 == 1) {
+                Utf8 charSequence705;
+                Object oldString705 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(705);
+                if (oldString705 instanceof Utf8) {
+                    charSequence705 = (decoder).readString(((Utf8) oldString705));
+                } else {
+                    charSequence705 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, charSequence705);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F705': "+ unionIndex705));
+            }
+        }
+        int unionIndex706 = (decoder.readIndex());
+        if (unionIndex706 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, null);
+        } else {
+            if (unionIndex706 == 1) {
+                Utf8 charSequence706;
+                Object oldString706 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(706);
+                if (oldString706 instanceof Utf8) {
+                    charSequence706 = (decoder).readString(((Utf8) oldString706));
+                } else {
+                    charSequence706 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, charSequence706);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F706': "+ unionIndex706));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex707 = (decoder.readIndex());
+        if (unionIndex707 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, null);
+        } else {
+            if (unionIndex707 == 1) {
+                Utf8 charSequence707;
+                Object oldString707 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(707);
+                if (oldString707 instanceof Utf8) {
+                    charSequence707 = (decoder).readString(((Utf8) oldString707));
+                } else {
+                    charSequence707 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, charSequence707);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F707': "+ unionIndex707));
+            }
+        }
+        int unionIndex708 = (decoder.readIndex());
+        if (unionIndex708 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, null);
+        } else {
+            if (unionIndex708 == 1) {
+                Utf8 charSequence708;
+                Object oldString708 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(708);
+                if (oldString708 instanceof Utf8) {
+                    charSequence708 = (decoder).readString(((Utf8) oldString708));
+                } else {
+                    charSequence708 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, charSequence708);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F708': "+ unionIndex708));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex709 = (decoder.readIndex());
+        if (unionIndex709 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, null);
+        } else {
+            if (unionIndex709 == 1) {
+                Utf8 charSequence709;
+                Object oldString709 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(709);
+                if (oldString709 instanceof Utf8) {
+                    charSequence709 = (decoder).readString(((Utf8) oldString709));
+                } else {
+                    charSequence709 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, charSequence709);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F709': "+ unionIndex709));
+            }
+        }
+        int unionIndex710 = (decoder.readIndex());
+        if (unionIndex710 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, null);
+        } else {
+            if (unionIndex710 == 1) {
+                Utf8 charSequence710;
+                Object oldString710 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(710);
+                if (oldString710 instanceof Utf8) {
+                    charSequence710 = (decoder).readString(((Utf8) oldString710));
+                } else {
+                    charSequence710 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, charSequence710);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F710': "+ unionIndex710));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex711 = (decoder.readIndex());
+        if (unionIndex711 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, null);
+        } else {
+            if (unionIndex711 == 1) {
+                Utf8 charSequence711;
+                Object oldString711 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(711);
+                if (oldString711 instanceof Utf8) {
+                    charSequence711 = (decoder).readString(((Utf8) oldString711));
+                } else {
+                    charSequence711 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, charSequence711);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F711': "+ unionIndex711));
+            }
+        }
+        int unionIndex712 = (decoder.readIndex());
+        if (unionIndex712 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, null);
+        } else {
+            if (unionIndex712 == 1) {
+                Utf8 charSequence712;
+                Object oldString712 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(712);
+                if (oldString712 instanceof Utf8) {
+                    charSequence712 = (decoder).readString(((Utf8) oldString712));
+                } else {
+                    charSequence712 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, charSequence712);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F712': "+ unionIndex712));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex713 = (decoder.readIndex());
+        if (unionIndex713 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, null);
+        } else {
+            if (unionIndex713 == 1) {
+                Utf8 charSequence713;
+                Object oldString713 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(713);
+                if (oldString713 instanceof Utf8) {
+                    charSequence713 = (decoder).readString(((Utf8) oldString713));
+                } else {
+                    charSequence713 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, charSequence713);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F713': "+ unionIndex713));
+            }
+        }
+        int unionIndex714 = (decoder.readIndex());
+        if (unionIndex714 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, null);
+        } else {
+            if (unionIndex714 == 1) {
+                Utf8 charSequence714;
+                Object oldString714 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(714);
+                if (oldString714 instanceof Utf8) {
+                    charSequence714 = (decoder).readString(((Utf8) oldString714));
+                } else {
+                    charSequence714 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, charSequence714);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F714': "+ unionIndex714));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex715 = (decoder.readIndex());
+        if (unionIndex715 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, null);
+        } else {
+            if (unionIndex715 == 1) {
+                Utf8 charSequence715;
+                Object oldString715 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(715);
+                if (oldString715 instanceof Utf8) {
+                    charSequence715 = (decoder).readString(((Utf8) oldString715));
+                } else {
+                    charSequence715 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, charSequence715);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F715': "+ unionIndex715));
+            }
+        }
+        int unionIndex716 = (decoder.readIndex());
+        if (unionIndex716 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, null);
+        } else {
+            if (unionIndex716 == 1) {
+                Utf8 charSequence716;
+                Object oldString716 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(716);
+                if (oldString716 instanceof Utf8) {
+                    charSequence716 = (decoder).readString(((Utf8) oldString716));
+                } else {
+                    charSequence716 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, charSequence716);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F716': "+ unionIndex716));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex717 = (decoder.readIndex());
+        if (unionIndex717 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, null);
+        } else {
+            if (unionIndex717 == 1) {
+                Utf8 charSequence717;
+                Object oldString717 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(717);
+                if (oldString717 instanceof Utf8) {
+                    charSequence717 = (decoder).readString(((Utf8) oldString717));
+                } else {
+                    charSequence717 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, charSequence717);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F717': "+ unionIndex717));
+            }
+        }
+        int unionIndex718 = (decoder.readIndex());
+        if (unionIndex718 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, null);
+        } else {
+            if (unionIndex718 == 1) {
+                Utf8 charSequence718;
+                Object oldString718 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(718);
+                if (oldString718 instanceof Utf8) {
+                    charSequence718 = (decoder).readString(((Utf8) oldString718));
+                } else {
+                    charSequence718 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, charSequence718);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F718': "+ unionIndex718));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex719 = (decoder.readIndex());
+        if (unionIndex719 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, null);
+        } else {
+            if (unionIndex719 == 1) {
+                Utf8 charSequence719;
+                Object oldString719 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(719);
+                if (oldString719 instanceof Utf8) {
+                    charSequence719 = (decoder).readString(((Utf8) oldString719));
+                } else {
+                    charSequence719 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, charSequence719);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F719': "+ unionIndex719));
+            }
+        }
+        int unionIndex720 = (decoder.readIndex());
+        if (unionIndex720 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, null);
+        } else {
+            if (unionIndex720 == 1) {
+                Utf8 charSequence720;
+                Object oldString720 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(720);
+                if (oldString720 instanceof Utf8) {
+                    charSequence720 = (decoder).readString(((Utf8) oldString720));
+                } else {
+                    charSequence720 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, charSequence720);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F720': "+ unionIndex720));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex721 = (decoder.readIndex());
+        if (unionIndex721 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, null);
+        } else {
+            if (unionIndex721 == 1) {
+                Utf8 charSequence721;
+                Object oldString721 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(721);
+                if (oldString721 instanceof Utf8) {
+                    charSequence721 = (decoder).readString(((Utf8) oldString721));
+                } else {
+                    charSequence721 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, charSequence721);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F721': "+ unionIndex721));
+            }
+        }
+        int unionIndex722 = (decoder.readIndex());
+        if (unionIndex722 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, null);
+        } else {
+            if (unionIndex722 == 1) {
+                Utf8 charSequence722;
+                Object oldString722 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(722);
+                if (oldString722 instanceof Utf8) {
+                    charSequence722 = (decoder).readString(((Utf8) oldString722));
+                } else {
+                    charSequence722 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, charSequence722);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F722': "+ unionIndex722));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex723 = (decoder.readIndex());
+        if (unionIndex723 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, null);
+        } else {
+            if (unionIndex723 == 1) {
+                Utf8 charSequence723;
+                Object oldString723 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(723);
+                if (oldString723 instanceof Utf8) {
+                    charSequence723 = (decoder).readString(((Utf8) oldString723));
+                } else {
+                    charSequence723 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, charSequence723);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F723': "+ unionIndex723));
+            }
+        }
+        int unionIndex724 = (decoder.readIndex());
+        if (unionIndex724 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, null);
+        } else {
+            if (unionIndex724 == 1) {
+                Utf8 charSequence724;
+                Object oldString724 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(724);
+                if (oldString724 instanceof Utf8) {
+                    charSequence724 = (decoder).readString(((Utf8) oldString724));
+                } else {
+                    charSequence724 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, charSequence724);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F724': "+ unionIndex724));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex725 = (decoder.readIndex());
+        if (unionIndex725 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, null);
+        } else {
+            if (unionIndex725 == 1) {
+                Utf8 charSequence725;
+                Object oldString725 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(725);
+                if (oldString725 instanceof Utf8) {
+                    charSequence725 = (decoder).readString(((Utf8) oldString725));
+                } else {
+                    charSequence725 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, charSequence725);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F725': "+ unionIndex725));
+            }
+        }
+        int unionIndex726 = (decoder.readIndex());
+        if (unionIndex726 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, null);
+        } else {
+            if (unionIndex726 == 1) {
+                Utf8 charSequence726;
+                Object oldString726 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(726);
+                if (oldString726 instanceof Utf8) {
+                    charSequence726 = (decoder).readString(((Utf8) oldString726));
+                } else {
+                    charSequence726 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, charSequence726);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F726': "+ unionIndex726));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex727 = (decoder.readIndex());
+        if (unionIndex727 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, null);
+        } else {
+            if (unionIndex727 == 1) {
+                Utf8 charSequence727;
+                Object oldString727 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(727);
+                if (oldString727 instanceof Utf8) {
+                    charSequence727 = (decoder).readString(((Utf8) oldString727));
+                } else {
+                    charSequence727 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, charSequence727);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F727': "+ unionIndex727));
+            }
+        }
+        int unionIndex728 = (decoder.readIndex());
+        if (unionIndex728 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, null);
+        } else {
+            if (unionIndex728 == 1) {
+                Utf8 charSequence728;
+                Object oldString728 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(728);
+                if (oldString728 instanceof Utf8) {
+                    charSequence728 = (decoder).readString(((Utf8) oldString728));
+                } else {
+                    charSequence728 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, charSequence728);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F728': "+ unionIndex728));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex729 = (decoder.readIndex());
+        if (unionIndex729 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, null);
+        } else {
+            if (unionIndex729 == 1) {
+                Utf8 charSequence729;
+                Object oldString729 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(729);
+                if (oldString729 instanceof Utf8) {
+                    charSequence729 = (decoder).readString(((Utf8) oldString729));
+                } else {
+                    charSequence729 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, charSequence729);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F729': "+ unionIndex729));
+            }
+        }
+        int unionIndex730 = (decoder.readIndex());
+        if (unionIndex730 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, null);
+        } else {
+            if (unionIndex730 == 1) {
+                Utf8 charSequence730;
+                Object oldString730 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(730);
+                if (oldString730 instanceof Utf8) {
+                    charSequence730 = (decoder).readString(((Utf8) oldString730));
+                } else {
+                    charSequence730 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, charSequence730);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F730': "+ unionIndex730));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex731 = (decoder.readIndex());
+        if (unionIndex731 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, null);
+        } else {
+            if (unionIndex731 == 1) {
+                Utf8 charSequence731;
+                Object oldString731 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(731);
+                if (oldString731 instanceof Utf8) {
+                    charSequence731 = (decoder).readString(((Utf8) oldString731));
+                } else {
+                    charSequence731 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, charSequence731);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F731': "+ unionIndex731));
+            }
+        }
+        int unionIndex732 = (decoder.readIndex());
+        if (unionIndex732 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, null);
+        } else {
+            if (unionIndex732 == 1) {
+                Utf8 charSequence732;
+                Object oldString732 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(732);
+                if (oldString732 instanceof Utf8) {
+                    charSequence732 = (decoder).readString(((Utf8) oldString732));
+                } else {
+                    charSequence732 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, charSequence732);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F732': "+ unionIndex732));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex733 = (decoder.readIndex());
+        if (unionIndex733 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, null);
+        } else {
+            if (unionIndex733 == 1) {
+                Utf8 charSequence733;
+                Object oldString733 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(733);
+                if (oldString733 instanceof Utf8) {
+                    charSequence733 = (decoder).readString(((Utf8) oldString733));
+                } else {
+                    charSequence733 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, charSequence733);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F733': "+ unionIndex733));
+            }
+        }
+        int unionIndex734 = (decoder.readIndex());
+        if (unionIndex734 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, null);
+        } else {
+            if (unionIndex734 == 1) {
+                Utf8 charSequence734;
+                Object oldString734 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(734);
+                if (oldString734 instanceof Utf8) {
+                    charSequence734 = (decoder).readString(((Utf8) oldString734));
+                } else {
+                    charSequence734 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, charSequence734);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F734': "+ unionIndex734));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex735 = (decoder.readIndex());
+        if (unionIndex735 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, null);
+        } else {
+            if (unionIndex735 == 1) {
+                Utf8 charSequence735;
+                Object oldString735 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(735);
+                if (oldString735 instanceof Utf8) {
+                    charSequence735 = (decoder).readString(((Utf8) oldString735));
+                } else {
+                    charSequence735 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, charSequence735);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F735': "+ unionIndex735));
+            }
+        }
+        int unionIndex736 = (decoder.readIndex());
+        if (unionIndex736 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, null);
+        } else {
+            if (unionIndex736 == 1) {
+                Utf8 charSequence736;
+                Object oldString736 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(736);
+                if (oldString736 instanceof Utf8) {
+                    charSequence736 = (decoder).readString(((Utf8) oldString736));
+                } else {
+                    charSequence736 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, charSequence736);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F736': "+ unionIndex736));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex737 = (decoder.readIndex());
+        if (unionIndex737 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, null);
+        } else {
+            if (unionIndex737 == 1) {
+                Utf8 charSequence737;
+                Object oldString737 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(737);
+                if (oldString737 instanceof Utf8) {
+                    charSequence737 = (decoder).readString(((Utf8) oldString737));
+                } else {
+                    charSequence737 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, charSequence737);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F737': "+ unionIndex737));
+            }
+        }
+        int unionIndex738 = (decoder.readIndex());
+        if (unionIndex738 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, null);
+        } else {
+            if (unionIndex738 == 1) {
+                Utf8 charSequence738;
+                Object oldString738 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(738);
+                if (oldString738 instanceof Utf8) {
+                    charSequence738 = (decoder).readString(((Utf8) oldString738));
+                } else {
+                    charSequence738 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, charSequence738);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F738': "+ unionIndex738));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex739 = (decoder.readIndex());
+        if (unionIndex739 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, null);
+        } else {
+            if (unionIndex739 == 1) {
+                Utf8 charSequence739;
+                Object oldString739 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(739);
+                if (oldString739 instanceof Utf8) {
+                    charSequence739 = (decoder).readString(((Utf8) oldString739));
+                } else {
+                    charSequence739 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, charSequence739);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F739': "+ unionIndex739));
+            }
+        }
+        int unionIndex740 = (decoder.readIndex());
+        if (unionIndex740 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, null);
+        } else {
+            if (unionIndex740 == 1) {
+                Utf8 charSequence740;
+                Object oldString740 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(740);
+                if (oldString740 instanceof Utf8) {
+                    charSequence740 = (decoder).readString(((Utf8) oldString740));
+                } else {
+                    charSequence740 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, charSequence740);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F740': "+ unionIndex740));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex741 = (decoder.readIndex());
+        if (unionIndex741 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, null);
+        } else {
+            if (unionIndex741 == 1) {
+                Utf8 charSequence741;
+                Object oldString741 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(741);
+                if (oldString741 instanceof Utf8) {
+                    charSequence741 = (decoder).readString(((Utf8) oldString741));
+                } else {
+                    charSequence741 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, charSequence741);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F741': "+ unionIndex741));
+            }
+        }
+        int unionIndex742 = (decoder.readIndex());
+        if (unionIndex742 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, null);
+        } else {
+            if (unionIndex742 == 1) {
+                Utf8 charSequence742;
+                Object oldString742 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(742);
+                if (oldString742 instanceof Utf8) {
+                    charSequence742 = (decoder).readString(((Utf8) oldString742));
+                } else {
+                    charSequence742 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, charSequence742);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F742': "+ unionIndex742));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex743 = (decoder.readIndex());
+        if (unionIndex743 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, null);
+        } else {
+            if (unionIndex743 == 1) {
+                Utf8 charSequence743;
+                Object oldString743 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(743);
+                if (oldString743 instanceof Utf8) {
+                    charSequence743 = (decoder).readString(((Utf8) oldString743));
+                } else {
+                    charSequence743 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, charSequence743);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F743': "+ unionIndex743));
+            }
+        }
+        int unionIndex744 = (decoder.readIndex());
+        if (unionIndex744 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, null);
+        } else {
+            if (unionIndex744 == 1) {
+                Utf8 charSequence744;
+                Object oldString744 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(744);
+                if (oldString744 instanceof Utf8) {
+                    charSequence744 = (decoder).readString(((Utf8) oldString744));
+                } else {
+                    charSequence744 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, charSequence744);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F744': "+ unionIndex744));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex745 = (decoder.readIndex());
+        if (unionIndex745 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, null);
+        } else {
+            if (unionIndex745 == 1) {
+                Utf8 charSequence745;
+                Object oldString745 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(745);
+                if (oldString745 instanceof Utf8) {
+                    charSequence745 = (decoder).readString(((Utf8) oldString745));
+                } else {
+                    charSequence745 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, charSequence745);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F745': "+ unionIndex745));
+            }
+        }
+        int unionIndex746 = (decoder.readIndex());
+        if (unionIndex746 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, null);
+        } else {
+            if (unionIndex746 == 1) {
+                Utf8 charSequence746;
+                Object oldString746 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(746);
+                if (oldString746 instanceof Utf8) {
+                    charSequence746 = (decoder).readString(((Utf8) oldString746));
+                } else {
+                    charSequence746 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, charSequence746);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F746': "+ unionIndex746));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex747 = (decoder.readIndex());
+        if (unionIndex747 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, null);
+        } else {
+            if (unionIndex747 == 1) {
+                Utf8 charSequence747;
+                Object oldString747 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(747);
+                if (oldString747 instanceof Utf8) {
+                    charSequence747 = (decoder).readString(((Utf8) oldString747));
+                } else {
+                    charSequence747 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, charSequence747);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F747': "+ unionIndex747));
+            }
+        }
+        int unionIndex748 = (decoder.readIndex());
+        if (unionIndex748 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, null);
+        } else {
+            if (unionIndex748 == 1) {
+                Utf8 charSequence748;
+                Object oldString748 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(748);
+                if (oldString748 instanceof Utf8) {
+                    charSequence748 = (decoder).readString(((Utf8) oldString748));
+                } else {
+                    charSequence748 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, charSequence748);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F748': "+ unionIndex748));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex749 = (decoder.readIndex());
+        if (unionIndex749 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, null);
+        } else {
+            if (unionIndex749 == 1) {
+                Utf8 charSequence749;
+                Object oldString749 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(749);
+                if (oldString749 instanceof Utf8) {
+                    charSequence749 = (decoder).readString(((Utf8) oldString749));
+                } else {
+                    charSequence749 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, charSequence749);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F749': "+ unionIndex749));
+            }
+        }
+        int unionIndex750 = (decoder.readIndex());
+        if (unionIndex750 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, null);
+        } else {
+            if (unionIndex750 == 1) {
+                Utf8 charSequence750;
+                Object oldString750 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(750);
+                if (oldString750 instanceof Utf8) {
+                    charSequence750 = (decoder).readString(((Utf8) oldString750));
+                } else {
+                    charSequence750 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, charSequence750);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F750': "+ unionIndex750));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex751 = (decoder.readIndex());
+        if (unionIndex751 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, null);
+        } else {
+            if (unionIndex751 == 1) {
+                Utf8 charSequence751;
+                Object oldString751 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(751);
+                if (oldString751 instanceof Utf8) {
+                    charSequence751 = (decoder).readString(((Utf8) oldString751));
+                } else {
+                    charSequence751 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, charSequence751);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F751': "+ unionIndex751));
+            }
+        }
+        int unionIndex752 = (decoder.readIndex());
+        if (unionIndex752 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, null);
+        } else {
+            if (unionIndex752 == 1) {
+                Utf8 charSequence752;
+                Object oldString752 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(752);
+                if (oldString752 instanceof Utf8) {
+                    charSequence752 = (decoder).readString(((Utf8) oldString752));
+                } else {
+                    charSequence752 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, charSequence752);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F752': "+ unionIndex752));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex753 = (decoder.readIndex());
+        if (unionIndex753 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, null);
+        } else {
+            if (unionIndex753 == 1) {
+                Utf8 charSequence753;
+                Object oldString753 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(753);
+                if (oldString753 instanceof Utf8) {
+                    charSequence753 = (decoder).readString(((Utf8) oldString753));
+                } else {
+                    charSequence753 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, charSequence753);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F753': "+ unionIndex753));
+            }
+        }
+        int unionIndex754 = (decoder.readIndex());
+        if (unionIndex754 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, null);
+        } else {
+            if (unionIndex754 == 1) {
+                Utf8 charSequence754;
+                Object oldString754 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(754);
+                if (oldString754 instanceof Utf8) {
+                    charSequence754 = (decoder).readString(((Utf8) oldString754));
+                } else {
+                    charSequence754 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, charSequence754);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F754': "+ unionIndex754));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex755 = (decoder.readIndex());
+        if (unionIndex755 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, null);
+        } else {
+            if (unionIndex755 == 1) {
+                Utf8 charSequence755;
+                Object oldString755 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(755);
+                if (oldString755 instanceof Utf8) {
+                    charSequence755 = (decoder).readString(((Utf8) oldString755));
+                } else {
+                    charSequence755 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, charSequence755);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F755': "+ unionIndex755));
+            }
+        }
+        int unionIndex756 = (decoder.readIndex());
+        if (unionIndex756 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, null);
+        } else {
+            if (unionIndex756 == 1) {
+                Utf8 charSequence756;
+                Object oldString756 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(756);
+                if (oldString756 instanceof Utf8) {
+                    charSequence756 = (decoder).readString(((Utf8) oldString756));
+                } else {
+                    charSequence756 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, charSequence756);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F756': "+ unionIndex756));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex757 = (decoder.readIndex());
+        if (unionIndex757 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, null);
+        } else {
+            if (unionIndex757 == 1) {
+                Utf8 charSequence757;
+                Object oldString757 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(757);
+                if (oldString757 instanceof Utf8) {
+                    charSequence757 = (decoder).readString(((Utf8) oldString757));
+                } else {
+                    charSequence757 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, charSequence757);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F757': "+ unionIndex757));
+            }
+        }
+        int unionIndex758 = (decoder.readIndex());
+        if (unionIndex758 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, null);
+        } else {
+            if (unionIndex758 == 1) {
+                Utf8 charSequence758;
+                Object oldString758 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(758);
+                if (oldString758 instanceof Utf8) {
+                    charSequence758 = (decoder).readString(((Utf8) oldString758));
+                } else {
+                    charSequence758 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, charSequence758);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F758': "+ unionIndex758));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex759 = (decoder.readIndex());
+        if (unionIndex759 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, null);
+        } else {
+            if (unionIndex759 == 1) {
+                Utf8 charSequence759;
+                Object oldString759 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(759);
+                if (oldString759 instanceof Utf8) {
+                    charSequence759 = (decoder).readString(((Utf8) oldString759));
+                } else {
+                    charSequence759 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, charSequence759);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F759': "+ unionIndex759));
+            }
+        }
+        int unionIndex760 = (decoder.readIndex());
+        if (unionIndex760 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, null);
+        } else {
+            if (unionIndex760 == 1) {
+                Utf8 charSequence760;
+                Object oldString760 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(760);
+                if (oldString760 instanceof Utf8) {
+                    charSequence760 = (decoder).readString(((Utf8) oldString760));
+                } else {
+                    charSequence760 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, charSequence760);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F760': "+ unionIndex760));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex761 = (decoder.readIndex());
+        if (unionIndex761 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, null);
+        } else {
+            if (unionIndex761 == 1) {
+                Utf8 charSequence761;
+                Object oldString761 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(761);
+                if (oldString761 instanceof Utf8) {
+                    charSequence761 = (decoder).readString(((Utf8) oldString761));
+                } else {
+                    charSequence761 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, charSequence761);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F761': "+ unionIndex761));
+            }
+        }
+        int unionIndex762 = (decoder.readIndex());
+        if (unionIndex762 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, null);
+        } else {
+            if (unionIndex762 == 1) {
+                Utf8 charSequence762;
+                Object oldString762 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(762);
+                if (oldString762 instanceof Utf8) {
+                    charSequence762 = (decoder).readString(((Utf8) oldString762));
+                } else {
+                    charSequence762 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, charSequence762);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F762': "+ unionIndex762));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex763 = (decoder.readIndex());
+        if (unionIndex763 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, null);
+        } else {
+            if (unionIndex763 == 1) {
+                Utf8 charSequence763;
+                Object oldString763 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(763);
+                if (oldString763 instanceof Utf8) {
+                    charSequence763 = (decoder).readString(((Utf8) oldString763));
+                } else {
+                    charSequence763 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, charSequence763);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F763': "+ unionIndex763));
+            }
+        }
+        int unionIndex764 = (decoder.readIndex());
+        if (unionIndex764 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, null);
+        } else {
+            if (unionIndex764 == 1) {
+                Utf8 charSequence764;
+                Object oldString764 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(764);
+                if (oldString764 instanceof Utf8) {
+                    charSequence764 = (decoder).readString(((Utf8) oldString764));
+                } else {
+                    charSequence764 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, charSequence764);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F764': "+ unionIndex764));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex765 = (decoder.readIndex());
+        if (unionIndex765 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, null);
+        } else {
+            if (unionIndex765 == 1) {
+                Utf8 charSequence765;
+                Object oldString765 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(765);
+                if (oldString765 instanceof Utf8) {
+                    charSequence765 = (decoder).readString(((Utf8) oldString765));
+                } else {
+                    charSequence765 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, charSequence765);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F765': "+ unionIndex765));
+            }
+        }
+        int unionIndex766 = (decoder.readIndex());
+        if (unionIndex766 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, null);
+        } else {
+            if (unionIndex766 == 1) {
+                Utf8 charSequence766;
+                Object oldString766 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(766);
+                if (oldString766 instanceof Utf8) {
+                    charSequence766 = (decoder).readString(((Utf8) oldString766));
+                } else {
+                    charSequence766 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, charSequence766);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F766': "+ unionIndex766));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex767 = (decoder.readIndex());
+        if (unionIndex767 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, null);
+        } else {
+            if (unionIndex767 == 1) {
+                Utf8 charSequence767;
+                Object oldString767 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(767);
+                if (oldString767 instanceof Utf8) {
+                    charSequence767 = (decoder).readString(((Utf8) oldString767));
+                } else {
+                    charSequence767 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, charSequence767);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F767': "+ unionIndex767));
+            }
+        }
+        int unionIndex768 = (decoder.readIndex());
+        if (unionIndex768 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, null);
+        } else {
+            if (unionIndex768 == 1) {
+                Utf8 charSequence768;
+                Object oldString768 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(768);
+                if (oldString768 instanceof Utf8) {
+                    charSequence768 = (decoder).readString(((Utf8) oldString768));
+                } else {
+                    charSequence768 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, charSequence768);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F768': "+ unionIndex768));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex769 = (decoder.readIndex());
+        if (unionIndex769 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, null);
+        } else {
+            if (unionIndex769 == 1) {
+                Utf8 charSequence769;
+                Object oldString769 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(769);
+                if (oldString769 instanceof Utf8) {
+                    charSequence769 = (decoder).readString(((Utf8) oldString769));
+                } else {
+                    charSequence769 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, charSequence769);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F769': "+ unionIndex769));
+            }
+        }
+        int unionIndex770 = (decoder.readIndex());
+        if (unionIndex770 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, null);
+        } else {
+            if (unionIndex770 == 1) {
+                Utf8 charSequence770;
+                Object oldString770 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(770);
+                if (oldString770 instanceof Utf8) {
+                    charSequence770 = (decoder).readString(((Utf8) oldString770));
+                } else {
+                    charSequence770 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, charSequence770);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F770': "+ unionIndex770));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex771 = (decoder.readIndex());
+        if (unionIndex771 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, null);
+        } else {
+            if (unionIndex771 == 1) {
+                Utf8 charSequence771;
+                Object oldString771 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(771);
+                if (oldString771 instanceof Utf8) {
+                    charSequence771 = (decoder).readString(((Utf8) oldString771));
+                } else {
+                    charSequence771 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, charSequence771);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F771': "+ unionIndex771));
+            }
+        }
+        int unionIndex772 = (decoder.readIndex());
+        if (unionIndex772 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, null);
+        } else {
+            if (unionIndex772 == 1) {
+                Utf8 charSequence772;
+                Object oldString772 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(772);
+                if (oldString772 instanceof Utf8) {
+                    charSequence772 = (decoder).readString(((Utf8) oldString772));
+                } else {
+                    charSequence772 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, charSequence772);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F772': "+ unionIndex772));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex773 = (decoder.readIndex());
+        if (unionIndex773 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, null);
+        } else {
+            if (unionIndex773 == 1) {
+                Utf8 charSequence773;
+                Object oldString773 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(773);
+                if (oldString773 instanceof Utf8) {
+                    charSequence773 = (decoder).readString(((Utf8) oldString773));
+                } else {
+                    charSequence773 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, charSequence773);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F773': "+ unionIndex773));
+            }
+        }
+        int unionIndex774 = (decoder.readIndex());
+        if (unionIndex774 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, null);
+        } else {
+            if (unionIndex774 == 1) {
+                Utf8 charSequence774;
+                Object oldString774 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(774);
+                if (oldString774 instanceof Utf8) {
+                    charSequence774 = (decoder).readString(((Utf8) oldString774));
+                } else {
+                    charSequence774 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, charSequence774);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F774': "+ unionIndex774));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex775 = (decoder.readIndex());
+        if (unionIndex775 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, null);
+        } else {
+            if (unionIndex775 == 1) {
+                Utf8 charSequence775;
+                Object oldString775 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(775);
+                if (oldString775 instanceof Utf8) {
+                    charSequence775 = (decoder).readString(((Utf8) oldString775));
+                } else {
+                    charSequence775 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, charSequence775);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F775': "+ unionIndex775));
+            }
+        }
+        int unionIndex776 = (decoder.readIndex());
+        if (unionIndex776 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, null);
+        } else {
+            if (unionIndex776 == 1) {
+                Utf8 charSequence776;
+                Object oldString776 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(776);
+                if (oldString776 instanceof Utf8) {
+                    charSequence776 = (decoder).readString(((Utf8) oldString776));
+                } else {
+                    charSequence776 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, charSequence776);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F776': "+ unionIndex776));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex777 = (decoder.readIndex());
+        if (unionIndex777 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, null);
+        } else {
+            if (unionIndex777 == 1) {
+                Utf8 charSequence777;
+                Object oldString777 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(777);
+                if (oldString777 instanceof Utf8) {
+                    charSequence777 = (decoder).readString(((Utf8) oldString777));
+                } else {
+                    charSequence777 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, charSequence777);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F777': "+ unionIndex777));
+            }
+        }
+        int unionIndex778 = (decoder.readIndex());
+        if (unionIndex778 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, null);
+        } else {
+            if (unionIndex778 == 1) {
+                Utf8 charSequence778;
+                Object oldString778 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(778);
+                if (oldString778 instanceof Utf8) {
+                    charSequence778 = (decoder).readString(((Utf8) oldString778));
+                } else {
+                    charSequence778 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, charSequence778);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F778': "+ unionIndex778));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex779 = (decoder.readIndex());
+        if (unionIndex779 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, null);
+        } else {
+            if (unionIndex779 == 1) {
+                Utf8 charSequence779;
+                Object oldString779 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(779);
+                if (oldString779 instanceof Utf8) {
+                    charSequence779 = (decoder).readString(((Utf8) oldString779));
+                } else {
+                    charSequence779 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, charSequence779);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F779': "+ unionIndex779));
+            }
+        }
+        int unionIndex780 = (decoder.readIndex());
+        if (unionIndex780 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, null);
+        } else {
+            if (unionIndex780 == 1) {
+                Utf8 charSequence780;
+                Object oldString780 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(780);
+                if (oldString780 instanceof Utf8) {
+                    charSequence780 = (decoder).readString(((Utf8) oldString780));
+                } else {
+                    charSequence780 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, charSequence780);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F780': "+ unionIndex780));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex781 = (decoder.readIndex());
+        if (unionIndex781 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, null);
+        } else {
+            if (unionIndex781 == 1) {
+                Utf8 charSequence781;
+                Object oldString781 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(781);
+                if (oldString781 instanceof Utf8) {
+                    charSequence781 = (decoder).readString(((Utf8) oldString781));
+                } else {
+                    charSequence781 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, charSequence781);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F781': "+ unionIndex781));
+            }
+        }
+        int unionIndex782 = (decoder.readIndex());
+        if (unionIndex782 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, null);
+        } else {
+            if (unionIndex782 == 1) {
+                Utf8 charSequence782;
+                Object oldString782 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(782);
+                if (oldString782 instanceof Utf8) {
+                    charSequence782 = (decoder).readString(((Utf8) oldString782));
+                } else {
+                    charSequence782 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, charSequence782);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F782': "+ unionIndex782));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex783 = (decoder.readIndex());
+        if (unionIndex783 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, null);
+        } else {
+            if (unionIndex783 == 1) {
+                Utf8 charSequence783;
+                Object oldString783 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(783);
+                if (oldString783 instanceof Utf8) {
+                    charSequence783 = (decoder).readString(((Utf8) oldString783));
+                } else {
+                    charSequence783 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, charSequence783);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F783': "+ unionIndex783));
+            }
+        }
+        int unionIndex784 = (decoder.readIndex());
+        if (unionIndex784 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, null);
+        } else {
+            if (unionIndex784 == 1) {
+                Utf8 charSequence784;
+                Object oldString784 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(784);
+                if (oldString784 instanceof Utf8) {
+                    charSequence784 = (decoder).readString(((Utf8) oldString784));
+                } else {
+                    charSequence784 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, charSequence784);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F784': "+ unionIndex784));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex785 = (decoder.readIndex());
+        if (unionIndex785 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, null);
+        } else {
+            if (unionIndex785 == 1) {
+                Utf8 charSequence785;
+                Object oldString785 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(785);
+                if (oldString785 instanceof Utf8) {
+                    charSequence785 = (decoder).readString(((Utf8) oldString785));
+                } else {
+                    charSequence785 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, charSequence785);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F785': "+ unionIndex785));
+            }
+        }
+        int unionIndex786 = (decoder.readIndex());
+        if (unionIndex786 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, null);
+        } else {
+            if (unionIndex786 == 1) {
+                Utf8 charSequence786;
+                Object oldString786 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(786);
+                if (oldString786 instanceof Utf8) {
+                    charSequence786 = (decoder).readString(((Utf8) oldString786));
+                } else {
+                    charSequence786 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, charSequence786);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F786': "+ unionIndex786));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex787 = (decoder.readIndex());
+        if (unionIndex787 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, null);
+        } else {
+            if (unionIndex787 == 1) {
+                Utf8 charSequence787;
+                Object oldString787 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(787);
+                if (oldString787 instanceof Utf8) {
+                    charSequence787 = (decoder).readString(((Utf8) oldString787));
+                } else {
+                    charSequence787 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, charSequence787);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F787': "+ unionIndex787));
+            }
+        }
+        int unionIndex788 = (decoder.readIndex());
+        if (unionIndex788 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, null);
+        } else {
+            if (unionIndex788 == 1) {
+                Utf8 charSequence788;
+                Object oldString788 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(788);
+                if (oldString788 instanceof Utf8) {
+                    charSequence788 = (decoder).readString(((Utf8) oldString788));
+                } else {
+                    charSequence788 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, charSequence788);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F788': "+ unionIndex788));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex789 = (decoder.readIndex());
+        if (unionIndex789 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, null);
+        } else {
+            if (unionIndex789 == 1) {
+                Utf8 charSequence789;
+                Object oldString789 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(789);
+                if (oldString789 instanceof Utf8) {
+                    charSequence789 = (decoder).readString(((Utf8) oldString789));
+                } else {
+                    charSequence789 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, charSequence789);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F789': "+ unionIndex789));
+            }
+        }
+        int unionIndex790 = (decoder.readIndex());
+        if (unionIndex790 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, null);
+        } else {
+            if (unionIndex790 == 1) {
+                Utf8 charSequence790;
+                Object oldString790 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(790);
+                if (oldString790 instanceof Utf8) {
+                    charSequence790 = (decoder).readString(((Utf8) oldString790));
+                } else {
+                    charSequence790 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, charSequence790);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F790': "+ unionIndex790));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex791 = (decoder.readIndex());
+        if (unionIndex791 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, null);
+        } else {
+            if (unionIndex791 == 1) {
+                Utf8 charSequence791;
+                Object oldString791 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(791);
+                if (oldString791 instanceof Utf8) {
+                    charSequence791 = (decoder).readString(((Utf8) oldString791));
+                } else {
+                    charSequence791 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, charSequence791);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F791': "+ unionIndex791));
+            }
+        }
+        int unionIndex792 = (decoder.readIndex());
+        if (unionIndex792 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, null);
+        } else {
+            if (unionIndex792 == 1) {
+                Utf8 charSequence792;
+                Object oldString792 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(792);
+                if (oldString792 instanceof Utf8) {
+                    charSequence792 = (decoder).readString(((Utf8) oldString792));
+                } else {
+                    charSequence792 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, charSequence792);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F792': "+ unionIndex792));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex793 = (decoder.readIndex());
+        if (unionIndex793 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, null);
+        } else {
+            if (unionIndex793 == 1) {
+                Utf8 charSequence793;
+                Object oldString793 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(793);
+                if (oldString793 instanceof Utf8) {
+                    charSequence793 = (decoder).readString(((Utf8) oldString793));
+                } else {
+                    charSequence793 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, charSequence793);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F793': "+ unionIndex793));
+            }
+        }
+        int unionIndex794 = (decoder.readIndex());
+        if (unionIndex794 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, null);
+        } else {
+            if (unionIndex794 == 1) {
+                Utf8 charSequence794;
+                Object oldString794 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(794);
+                if (oldString794 instanceof Utf8) {
+                    charSequence794 = (decoder).readString(((Utf8) oldString794));
+                } else {
+                    charSequence794 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, charSequence794);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F794': "+ unionIndex794));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex795 = (decoder.readIndex());
+        if (unionIndex795 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, null);
+        } else {
+            if (unionIndex795 == 1) {
+                Utf8 charSequence795;
+                Object oldString795 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(795);
+                if (oldString795 instanceof Utf8) {
+                    charSequence795 = (decoder).readString(((Utf8) oldString795));
+                } else {
+                    charSequence795 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, charSequence795);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F795': "+ unionIndex795));
+            }
+        }
+        int unionIndex796 = (decoder.readIndex());
+        if (unionIndex796 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, null);
+        } else {
+            if (unionIndex796 == 1) {
+                Utf8 charSequence796;
+                Object oldString796 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(796);
+                if (oldString796 instanceof Utf8) {
+                    charSequence796 = (decoder).readString(((Utf8) oldString796));
+                } else {
+                    charSequence796 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, charSequence796);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F796': "+ unionIndex796));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex797 = (decoder.readIndex());
+        if (unionIndex797 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, null);
+        } else {
+            if (unionIndex797 == 1) {
+                Utf8 charSequence797;
+                Object oldString797 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(797);
+                if (oldString797 instanceof Utf8) {
+                    charSequence797 = (decoder).readString(((Utf8) oldString797));
+                } else {
+                    charSequence797 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, charSequence797);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F797': "+ unionIndex797));
+            }
+        }
+        int unionIndex798 = (decoder.readIndex());
+        if (unionIndex798 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, null);
+        } else {
+            if (unionIndex798 == 1) {
+                Utf8 charSequence798;
+                Object oldString798 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(798);
+                if (oldString798 instanceof Utf8) {
+                    charSequence798 = (decoder).readString(((Utf8) oldString798));
+                } else {
+                    charSequence798 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, charSequence798);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F798': "+ unionIndex798));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex799 = (decoder.readIndex());
+        if (unionIndex799 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, null);
+        } else {
+            if (unionIndex799 == 1) {
+                Utf8 charSequence799;
+                Object oldString799 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(799);
+                if (oldString799 instanceof Utf8) {
+                    charSequence799 = (decoder).readString(((Utf8) oldString799));
+                } else {
+                    charSequence799 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, charSequence799);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F799': "+ unionIndex799));
+            }
+        }
+        int unionIndex800 = (decoder.readIndex());
+        if (unionIndex800 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, null);
+        } else {
+            if (unionIndex800 == 1) {
+                Utf8 charSequence800;
+                Object oldString800 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(800);
+                if (oldString800 instanceof Utf8) {
+                    charSequence800 = (decoder).readString(((Utf8) oldString800));
+                } else {
+                    charSequence800 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, charSequence800);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F800': "+ unionIndex800));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex801 = (decoder.readIndex());
+        if (unionIndex801 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, null);
+        } else {
+            if (unionIndex801 == 1) {
+                Utf8 charSequence801;
+                Object oldString801 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(801);
+                if (oldString801 instanceof Utf8) {
+                    charSequence801 = (decoder).readString(((Utf8) oldString801));
+                } else {
+                    charSequence801 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, charSequence801);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F801': "+ unionIndex801));
+            }
+        }
+        int unionIndex802 = (decoder.readIndex());
+        if (unionIndex802 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, null);
+        } else {
+            if (unionIndex802 == 1) {
+                Utf8 charSequence802;
+                Object oldString802 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(802);
+                if (oldString802 instanceof Utf8) {
+                    charSequence802 = (decoder).readString(((Utf8) oldString802));
+                } else {
+                    charSequence802 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, charSequence802);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F802': "+ unionIndex802));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex803 = (decoder.readIndex());
+        if (unionIndex803 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, null);
+        } else {
+            if (unionIndex803 == 1) {
+                Utf8 charSequence803;
+                Object oldString803 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(803);
+                if (oldString803 instanceof Utf8) {
+                    charSequence803 = (decoder).readString(((Utf8) oldString803));
+                } else {
+                    charSequence803 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, charSequence803);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F803': "+ unionIndex803));
+            }
+        }
+        int unionIndex804 = (decoder.readIndex());
+        if (unionIndex804 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, null);
+        } else {
+            if (unionIndex804 == 1) {
+                Utf8 charSequence804;
+                Object oldString804 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(804);
+                if (oldString804 instanceof Utf8) {
+                    charSequence804 = (decoder).readString(((Utf8) oldString804));
+                } else {
+                    charSequence804 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, charSequence804);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F804': "+ unionIndex804));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex805 = (decoder.readIndex());
+        if (unionIndex805 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, null);
+        } else {
+            if (unionIndex805 == 1) {
+                Utf8 charSequence805;
+                Object oldString805 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(805);
+                if (oldString805 instanceof Utf8) {
+                    charSequence805 = (decoder).readString(((Utf8) oldString805));
+                } else {
+                    charSequence805 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, charSequence805);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F805': "+ unionIndex805));
+            }
+        }
+        int unionIndex806 = (decoder.readIndex());
+        if (unionIndex806 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, null);
+        } else {
+            if (unionIndex806 == 1) {
+                Utf8 charSequence806;
+                Object oldString806 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(806);
+                if (oldString806 instanceof Utf8) {
+                    charSequence806 = (decoder).readString(((Utf8) oldString806));
+                } else {
+                    charSequence806 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, charSequence806);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F806': "+ unionIndex806));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex807 = (decoder.readIndex());
+        if (unionIndex807 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, null);
+        } else {
+            if (unionIndex807 == 1) {
+                Utf8 charSequence807;
+                Object oldString807 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(807);
+                if (oldString807 instanceof Utf8) {
+                    charSequence807 = (decoder).readString(((Utf8) oldString807));
+                } else {
+                    charSequence807 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, charSequence807);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F807': "+ unionIndex807));
+            }
+        }
+        int unionIndex808 = (decoder.readIndex());
+        if (unionIndex808 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, null);
+        } else {
+            if (unionIndex808 == 1) {
+                Utf8 charSequence808;
+                Object oldString808 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(808);
+                if (oldString808 instanceof Utf8) {
+                    charSequence808 = (decoder).readString(((Utf8) oldString808));
+                } else {
+                    charSequence808 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, charSequence808);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F808': "+ unionIndex808));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex809 = (decoder.readIndex());
+        if (unionIndex809 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, null);
+        } else {
+            if (unionIndex809 == 1) {
+                Utf8 charSequence809;
+                Object oldString809 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(809);
+                if (oldString809 instanceof Utf8) {
+                    charSequence809 = (decoder).readString(((Utf8) oldString809));
+                } else {
+                    charSequence809 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, charSequence809);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F809': "+ unionIndex809));
+            }
+        }
+        int unionIndex810 = (decoder.readIndex());
+        if (unionIndex810 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, null);
+        } else {
+            if (unionIndex810 == 1) {
+                Utf8 charSequence810;
+                Object oldString810 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(810);
+                if (oldString810 instanceof Utf8) {
+                    charSequence810 = (decoder).readString(((Utf8) oldString810));
+                } else {
+                    charSequence810 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, charSequence810);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F810': "+ unionIndex810));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex811 = (decoder.readIndex());
+        if (unionIndex811 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, null);
+        } else {
+            if (unionIndex811 == 1) {
+                Utf8 charSequence811;
+                Object oldString811 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(811);
+                if (oldString811 instanceof Utf8) {
+                    charSequence811 = (decoder).readString(((Utf8) oldString811));
+                } else {
+                    charSequence811 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, charSequence811);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F811': "+ unionIndex811));
+            }
+        }
+        int unionIndex812 = (decoder.readIndex());
+        if (unionIndex812 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, null);
+        } else {
+            if (unionIndex812 == 1) {
+                Utf8 charSequence812;
+                Object oldString812 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(812);
+                if (oldString812 instanceof Utf8) {
+                    charSequence812 = (decoder).readString(((Utf8) oldString812));
+                } else {
+                    charSequence812 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, charSequence812);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F812': "+ unionIndex812));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex813 = (decoder.readIndex());
+        if (unionIndex813 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, null);
+        } else {
+            if (unionIndex813 == 1) {
+                Utf8 charSequence813;
+                Object oldString813 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(813);
+                if (oldString813 instanceof Utf8) {
+                    charSequence813 = (decoder).readString(((Utf8) oldString813));
+                } else {
+                    charSequence813 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, charSequence813);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F813': "+ unionIndex813));
+            }
+        }
+        int unionIndex814 = (decoder.readIndex());
+        if (unionIndex814 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, null);
+        } else {
+            if (unionIndex814 == 1) {
+                Utf8 charSequence814;
+                Object oldString814 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(814);
+                if (oldString814 instanceof Utf8) {
+                    charSequence814 = (decoder).readString(((Utf8) oldString814));
+                } else {
+                    charSequence814 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, charSequence814);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F814': "+ unionIndex814));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex815 = (decoder.readIndex());
+        if (unionIndex815 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, null);
+        } else {
+            if (unionIndex815 == 1) {
+                Utf8 charSequence815;
+                Object oldString815 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(815);
+                if (oldString815 instanceof Utf8) {
+                    charSequence815 = (decoder).readString(((Utf8) oldString815));
+                } else {
+                    charSequence815 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, charSequence815);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F815': "+ unionIndex815));
+            }
+        }
+        int unionIndex816 = (decoder.readIndex());
+        if (unionIndex816 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, null);
+        } else {
+            if (unionIndex816 == 1) {
+                Utf8 charSequence816;
+                Object oldString816 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(816);
+                if (oldString816 instanceof Utf8) {
+                    charSequence816 = (decoder).readString(((Utf8) oldString816));
+                } else {
+                    charSequence816 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, charSequence816);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F816': "+ unionIndex816));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex817 = (decoder.readIndex());
+        if (unionIndex817 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, null);
+        } else {
+            if (unionIndex817 == 1) {
+                Utf8 charSequence817;
+                Object oldString817 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(817);
+                if (oldString817 instanceof Utf8) {
+                    charSequence817 = (decoder).readString(((Utf8) oldString817));
+                } else {
+                    charSequence817 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, charSequence817);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F817': "+ unionIndex817));
+            }
+        }
+        int unionIndex818 = (decoder.readIndex());
+        if (unionIndex818 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, null);
+        } else {
+            if (unionIndex818 == 1) {
+                Utf8 charSequence818;
+                Object oldString818 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(818);
+                if (oldString818 instanceof Utf8) {
+                    charSequence818 = (decoder).readString(((Utf8) oldString818));
+                } else {
+                    charSequence818 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, charSequence818);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F818': "+ unionIndex818));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex819 = (decoder.readIndex());
+        if (unionIndex819 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, null);
+        } else {
+            if (unionIndex819 == 1) {
+                Utf8 charSequence819;
+                Object oldString819 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(819);
+                if (oldString819 instanceof Utf8) {
+                    charSequence819 = (decoder).readString(((Utf8) oldString819));
+                } else {
+                    charSequence819 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, charSequence819);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F819': "+ unionIndex819));
+            }
+        }
+        int unionIndex820 = (decoder.readIndex());
+        if (unionIndex820 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, null);
+        } else {
+            if (unionIndex820 == 1) {
+                Utf8 charSequence820;
+                Object oldString820 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(820);
+                if (oldString820 instanceof Utf8) {
+                    charSequence820 = (decoder).readString(((Utf8) oldString820));
+                } else {
+                    charSequence820 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, charSequence820);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F820': "+ unionIndex820));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex821 = (decoder.readIndex());
+        if (unionIndex821 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, null);
+        } else {
+            if (unionIndex821 == 1) {
+                Utf8 charSequence821;
+                Object oldString821 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(821);
+                if (oldString821 instanceof Utf8) {
+                    charSequence821 = (decoder).readString(((Utf8) oldString821));
+                } else {
+                    charSequence821 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, charSequence821);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F821': "+ unionIndex821));
+            }
+        }
+        int unionIndex822 = (decoder.readIndex());
+        if (unionIndex822 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, null);
+        } else {
+            if (unionIndex822 == 1) {
+                Utf8 charSequence822;
+                Object oldString822 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(822);
+                if (oldString822 instanceof Utf8) {
+                    charSequence822 = (decoder).readString(((Utf8) oldString822));
+                } else {
+                    charSequence822 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, charSequence822);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F822': "+ unionIndex822));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex823 = (decoder.readIndex());
+        if (unionIndex823 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, null);
+        } else {
+            if (unionIndex823 == 1) {
+                Utf8 charSequence823;
+                Object oldString823 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(823);
+                if (oldString823 instanceof Utf8) {
+                    charSequence823 = (decoder).readString(((Utf8) oldString823));
+                } else {
+                    charSequence823 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, charSequence823);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F823': "+ unionIndex823));
+            }
+        }
+        int unionIndex824 = (decoder.readIndex());
+        if (unionIndex824 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, null);
+        } else {
+            if (unionIndex824 == 1) {
+                Utf8 charSequence824;
+                Object oldString824 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(824);
+                if (oldString824 instanceof Utf8) {
+                    charSequence824 = (decoder).readString(((Utf8) oldString824));
+                } else {
+                    charSequence824 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, charSequence824);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F824': "+ unionIndex824));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex825 = (decoder.readIndex());
+        if (unionIndex825 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, null);
+        } else {
+            if (unionIndex825 == 1) {
+                Utf8 charSequence825;
+                Object oldString825 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(825);
+                if (oldString825 instanceof Utf8) {
+                    charSequence825 = (decoder).readString(((Utf8) oldString825));
+                } else {
+                    charSequence825 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, charSequence825);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F825': "+ unionIndex825));
+            }
+        }
+        int unionIndex826 = (decoder.readIndex());
+        if (unionIndex826 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, null);
+        } else {
+            if (unionIndex826 == 1) {
+                Utf8 charSequence826;
+                Object oldString826 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(826);
+                if (oldString826 instanceof Utf8) {
+                    charSequence826 = (decoder).readString(((Utf8) oldString826));
+                } else {
+                    charSequence826 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, charSequence826);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F826': "+ unionIndex826));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex827 = (decoder.readIndex());
+        if (unionIndex827 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, null);
+        } else {
+            if (unionIndex827 == 1) {
+                Utf8 charSequence827;
+                Object oldString827 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(827);
+                if (oldString827 instanceof Utf8) {
+                    charSequence827 = (decoder).readString(((Utf8) oldString827));
+                } else {
+                    charSequence827 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, charSequence827);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F827': "+ unionIndex827));
+            }
+        }
+        int unionIndex828 = (decoder.readIndex());
+        if (unionIndex828 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, null);
+        } else {
+            if (unionIndex828 == 1) {
+                Utf8 charSequence828;
+                Object oldString828 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(828);
+                if (oldString828 instanceof Utf8) {
+                    charSequence828 = (decoder).readString(((Utf8) oldString828));
+                } else {
+                    charSequence828 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, charSequence828);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F828': "+ unionIndex828));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex829 = (decoder.readIndex());
+        if (unionIndex829 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, null);
+        } else {
+            if (unionIndex829 == 1) {
+                Utf8 charSequence829;
+                Object oldString829 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(829);
+                if (oldString829 instanceof Utf8) {
+                    charSequence829 = (decoder).readString(((Utf8) oldString829));
+                } else {
+                    charSequence829 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, charSequence829);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F829': "+ unionIndex829));
+            }
+        }
+        int unionIndex830 = (decoder.readIndex());
+        if (unionIndex830 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, null);
+        } else {
+            if (unionIndex830 == 1) {
+                Utf8 charSequence830;
+                Object oldString830 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(830);
+                if (oldString830 instanceof Utf8) {
+                    charSequence830 = (decoder).readString(((Utf8) oldString830));
+                } else {
+                    charSequence830 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, charSequence830);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F830': "+ unionIndex830));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex831 = (decoder.readIndex());
+        if (unionIndex831 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, null);
+        } else {
+            if (unionIndex831 == 1) {
+                Utf8 charSequence831;
+                Object oldString831 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(831);
+                if (oldString831 instanceof Utf8) {
+                    charSequence831 = (decoder).readString(((Utf8) oldString831));
+                } else {
+                    charSequence831 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, charSequence831);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F831': "+ unionIndex831));
+            }
+        }
+        int unionIndex832 = (decoder.readIndex());
+        if (unionIndex832 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, null);
+        } else {
+            if (unionIndex832 == 1) {
+                Utf8 charSequence832;
+                Object oldString832 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(832);
+                if (oldString832 instanceof Utf8) {
+                    charSequence832 = (decoder).readString(((Utf8) oldString832));
+                } else {
+                    charSequence832 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, charSequence832);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F832': "+ unionIndex832));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex833 = (decoder.readIndex());
+        if (unionIndex833 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, null);
+        } else {
+            if (unionIndex833 == 1) {
+                Utf8 charSequence833;
+                Object oldString833 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(833);
+                if (oldString833 instanceof Utf8) {
+                    charSequence833 = (decoder).readString(((Utf8) oldString833));
+                } else {
+                    charSequence833 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, charSequence833);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F833': "+ unionIndex833));
+            }
+        }
+        int unionIndex834 = (decoder.readIndex());
+        if (unionIndex834 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, null);
+        } else {
+            if (unionIndex834 == 1) {
+                Utf8 charSequence834;
+                Object oldString834 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(834);
+                if (oldString834 instanceof Utf8) {
+                    charSequence834 = (decoder).readString(((Utf8) oldString834));
+                } else {
+                    charSequence834 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, charSequence834);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F834': "+ unionIndex834));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex835 = (decoder.readIndex());
+        if (unionIndex835 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, null);
+        } else {
+            if (unionIndex835 == 1) {
+                Utf8 charSequence835;
+                Object oldString835 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(835);
+                if (oldString835 instanceof Utf8) {
+                    charSequence835 = (decoder).readString(((Utf8) oldString835));
+                } else {
+                    charSequence835 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, charSequence835);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F835': "+ unionIndex835));
+            }
+        }
+        int unionIndex836 = (decoder.readIndex());
+        if (unionIndex836 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, null);
+        } else {
+            if (unionIndex836 == 1) {
+                Utf8 charSequence836;
+                Object oldString836 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(836);
+                if (oldString836 instanceof Utf8) {
+                    charSequence836 = (decoder).readString(((Utf8) oldString836));
+                } else {
+                    charSequence836 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, charSequence836);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F836': "+ unionIndex836));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex837 = (decoder.readIndex());
+        if (unionIndex837 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, null);
+        } else {
+            if (unionIndex837 == 1) {
+                Utf8 charSequence837;
+                Object oldString837 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(837);
+                if (oldString837 instanceof Utf8) {
+                    charSequence837 = (decoder).readString(((Utf8) oldString837));
+                } else {
+                    charSequence837 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, charSequence837);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F837': "+ unionIndex837));
+            }
+        }
+        int unionIndex838 = (decoder.readIndex());
+        if (unionIndex838 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, null);
+        } else {
+            if (unionIndex838 == 1) {
+                Utf8 charSequence838;
+                Object oldString838 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(838);
+                if (oldString838 instanceof Utf8) {
+                    charSequence838 = (decoder).readString(((Utf8) oldString838));
+                } else {
+                    charSequence838 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, charSequence838);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F838': "+ unionIndex838));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex839 = (decoder.readIndex());
+        if (unionIndex839 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, null);
+        } else {
+            if (unionIndex839 == 1) {
+                Utf8 charSequence839;
+                Object oldString839 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(839);
+                if (oldString839 instanceof Utf8) {
+                    charSequence839 = (decoder).readString(((Utf8) oldString839));
+                } else {
+                    charSequence839 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, charSequence839);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F839': "+ unionIndex839));
+            }
+        }
+        int unionIndex840 = (decoder.readIndex());
+        if (unionIndex840 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, null);
+        } else {
+            if (unionIndex840 == 1) {
+                Utf8 charSequence840;
+                Object oldString840 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(840);
+                if (oldString840 instanceof Utf8) {
+                    charSequence840 = (decoder).readString(((Utf8) oldString840));
+                } else {
+                    charSequence840 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, charSequence840);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F840': "+ unionIndex840));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex841 = (decoder.readIndex());
+        if (unionIndex841 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, null);
+        } else {
+            if (unionIndex841 == 1) {
+                Utf8 charSequence841;
+                Object oldString841 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(841);
+                if (oldString841 instanceof Utf8) {
+                    charSequence841 = (decoder).readString(((Utf8) oldString841));
+                } else {
+                    charSequence841 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, charSequence841);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F841': "+ unionIndex841));
+            }
+        }
+        int unionIndex842 = (decoder.readIndex());
+        if (unionIndex842 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, null);
+        } else {
+            if (unionIndex842 == 1) {
+                Utf8 charSequence842;
+                Object oldString842 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(842);
+                if (oldString842 instanceof Utf8) {
+                    charSequence842 = (decoder).readString(((Utf8) oldString842));
+                } else {
+                    charSequence842 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, charSequence842);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F842': "+ unionIndex842));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex843 = (decoder.readIndex());
+        if (unionIndex843 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, null);
+        } else {
+            if (unionIndex843 == 1) {
+                Utf8 charSequence843;
+                Object oldString843 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(843);
+                if (oldString843 instanceof Utf8) {
+                    charSequence843 = (decoder).readString(((Utf8) oldString843));
+                } else {
+                    charSequence843 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, charSequence843);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F843': "+ unionIndex843));
+            }
+        }
+        int unionIndex844 = (decoder.readIndex());
+        if (unionIndex844 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, null);
+        } else {
+            if (unionIndex844 == 1) {
+                Utf8 charSequence844;
+                Object oldString844 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(844);
+                if (oldString844 instanceof Utf8) {
+                    charSequence844 = (decoder).readString(((Utf8) oldString844));
+                } else {
+                    charSequence844 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, charSequence844);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F844': "+ unionIndex844));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex845 = (decoder.readIndex());
+        if (unionIndex845 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, null);
+        } else {
+            if (unionIndex845 == 1) {
+                Utf8 charSequence845;
+                Object oldString845 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(845);
+                if (oldString845 instanceof Utf8) {
+                    charSequence845 = (decoder).readString(((Utf8) oldString845));
+                } else {
+                    charSequence845 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, charSequence845);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F845': "+ unionIndex845));
+            }
+        }
+        int unionIndex846 = (decoder.readIndex());
+        if (unionIndex846 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, null);
+        } else {
+            if (unionIndex846 == 1) {
+                Utf8 charSequence846;
+                Object oldString846 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(846);
+                if (oldString846 instanceof Utf8) {
+                    charSequence846 = (decoder).readString(((Utf8) oldString846));
+                } else {
+                    charSequence846 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, charSequence846);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F846': "+ unionIndex846));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex847 = (decoder.readIndex());
+        if (unionIndex847 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, null);
+        } else {
+            if (unionIndex847 == 1) {
+                Utf8 charSequence847;
+                Object oldString847 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(847);
+                if (oldString847 instanceof Utf8) {
+                    charSequence847 = (decoder).readString(((Utf8) oldString847));
+                } else {
+                    charSequence847 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, charSequence847);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F847': "+ unionIndex847));
+            }
+        }
+        int unionIndex848 = (decoder.readIndex());
+        if (unionIndex848 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, null);
+        } else {
+            if (unionIndex848 == 1) {
+                Utf8 charSequence848;
+                Object oldString848 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(848);
+                if (oldString848 instanceof Utf8) {
+                    charSequence848 = (decoder).readString(((Utf8) oldString848));
+                } else {
+                    charSequence848 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, charSequence848);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F848': "+ unionIndex848));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex849 = (decoder.readIndex());
+        if (unionIndex849 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, null);
+        } else {
+            if (unionIndex849 == 1) {
+                Utf8 charSequence849;
+                Object oldString849 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(849);
+                if (oldString849 instanceof Utf8) {
+                    charSequence849 = (decoder).readString(((Utf8) oldString849));
+                } else {
+                    charSequence849 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, charSequence849);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F849': "+ unionIndex849));
+            }
+        }
+        int unionIndex850 = (decoder.readIndex());
+        if (unionIndex850 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, null);
+        } else {
+            if (unionIndex850 == 1) {
+                Utf8 charSequence850;
+                Object oldString850 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(850);
+                if (oldString850 instanceof Utf8) {
+                    charSequence850 = (decoder).readString(((Utf8) oldString850));
+                } else {
+                    charSequence850 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, charSequence850);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F850': "+ unionIndex850));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex851 = (decoder.readIndex());
+        if (unionIndex851 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, null);
+        } else {
+            if (unionIndex851 == 1) {
+                Utf8 charSequence851;
+                Object oldString851 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(851);
+                if (oldString851 instanceof Utf8) {
+                    charSequence851 = (decoder).readString(((Utf8) oldString851));
+                } else {
+                    charSequence851 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, charSequence851);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F851': "+ unionIndex851));
+            }
+        }
+        int unionIndex852 = (decoder.readIndex());
+        if (unionIndex852 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, null);
+        } else {
+            if (unionIndex852 == 1) {
+                Utf8 charSequence852;
+                Object oldString852 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(852);
+                if (oldString852 instanceof Utf8) {
+                    charSequence852 = (decoder).readString(((Utf8) oldString852));
+                } else {
+                    charSequence852 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, charSequence852);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F852': "+ unionIndex852));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex853 = (decoder.readIndex());
+        if (unionIndex853 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, null);
+        } else {
+            if (unionIndex853 == 1) {
+                Utf8 charSequence853;
+                Object oldString853 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(853);
+                if (oldString853 instanceof Utf8) {
+                    charSequence853 = (decoder).readString(((Utf8) oldString853));
+                } else {
+                    charSequence853 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, charSequence853);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F853': "+ unionIndex853));
+            }
+        }
+        int unionIndex854 = (decoder.readIndex());
+        if (unionIndex854 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, null);
+        } else {
+            if (unionIndex854 == 1) {
+                Utf8 charSequence854;
+                Object oldString854 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(854);
+                if (oldString854 instanceof Utf8) {
+                    charSequence854 = (decoder).readString(((Utf8) oldString854));
+                } else {
+                    charSequence854 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, charSequence854);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F854': "+ unionIndex854));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex855 = (decoder.readIndex());
+        if (unionIndex855 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, null);
+        } else {
+            if (unionIndex855 == 1) {
+                Utf8 charSequence855;
+                Object oldString855 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(855);
+                if (oldString855 instanceof Utf8) {
+                    charSequence855 = (decoder).readString(((Utf8) oldString855));
+                } else {
+                    charSequence855 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, charSequence855);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F855': "+ unionIndex855));
+            }
+        }
+        int unionIndex856 = (decoder.readIndex());
+        if (unionIndex856 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, null);
+        } else {
+            if (unionIndex856 == 1) {
+                Utf8 charSequence856;
+                Object oldString856 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(856);
+                if (oldString856 instanceof Utf8) {
+                    charSequence856 = (decoder).readString(((Utf8) oldString856));
+                } else {
+                    charSequence856 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, charSequence856);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F856': "+ unionIndex856));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex857 = (decoder.readIndex());
+        if (unionIndex857 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, null);
+        } else {
+            if (unionIndex857 == 1) {
+                Utf8 charSequence857;
+                Object oldString857 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(857);
+                if (oldString857 instanceof Utf8) {
+                    charSequence857 = (decoder).readString(((Utf8) oldString857));
+                } else {
+                    charSequence857 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, charSequence857);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F857': "+ unionIndex857));
+            }
+        }
+        int unionIndex858 = (decoder.readIndex());
+        if (unionIndex858 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, null);
+        } else {
+            if (unionIndex858 == 1) {
+                Utf8 charSequence858;
+                Object oldString858 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(858);
+                if (oldString858 instanceof Utf8) {
+                    charSequence858 = (decoder).readString(((Utf8) oldString858));
+                } else {
+                    charSequence858 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, charSequence858);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F858': "+ unionIndex858));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex859 = (decoder.readIndex());
+        if (unionIndex859 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, null);
+        } else {
+            if (unionIndex859 == 1) {
+                Utf8 charSequence859;
+                Object oldString859 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(859);
+                if (oldString859 instanceof Utf8) {
+                    charSequence859 = (decoder).readString(((Utf8) oldString859));
+                } else {
+                    charSequence859 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, charSequence859);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F859': "+ unionIndex859));
+            }
+        }
+        int unionIndex860 = (decoder.readIndex());
+        if (unionIndex860 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, null);
+        } else {
+            if (unionIndex860 == 1) {
+                Utf8 charSequence860;
+                Object oldString860 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(860);
+                if (oldString860 instanceof Utf8) {
+                    charSequence860 = (decoder).readString(((Utf8) oldString860));
+                } else {
+                    charSequence860 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, charSequence860);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F860': "+ unionIndex860));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex861 = (decoder.readIndex());
+        if (unionIndex861 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, null);
+        } else {
+            if (unionIndex861 == 1) {
+                Utf8 charSequence861;
+                Object oldString861 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(861);
+                if (oldString861 instanceof Utf8) {
+                    charSequence861 = (decoder).readString(((Utf8) oldString861));
+                } else {
+                    charSequence861 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, charSequence861);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F861': "+ unionIndex861));
+            }
+        }
+        int unionIndex862 = (decoder.readIndex());
+        if (unionIndex862 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, null);
+        } else {
+            if (unionIndex862 == 1) {
+                Utf8 charSequence862;
+                Object oldString862 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(862);
+                if (oldString862 instanceof Utf8) {
+                    charSequence862 = (decoder).readString(((Utf8) oldString862));
+                } else {
+                    charSequence862 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, charSequence862);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F862': "+ unionIndex862));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex863 = (decoder.readIndex());
+        if (unionIndex863 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, null);
+        } else {
+            if (unionIndex863 == 1) {
+                Utf8 charSequence863;
+                Object oldString863 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(863);
+                if (oldString863 instanceof Utf8) {
+                    charSequence863 = (decoder).readString(((Utf8) oldString863));
+                } else {
+                    charSequence863 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, charSequence863);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F863': "+ unionIndex863));
+            }
+        }
+        int unionIndex864 = (decoder.readIndex());
+        if (unionIndex864 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, null);
+        } else {
+            if (unionIndex864 == 1) {
+                Utf8 charSequence864;
+                Object oldString864 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(864);
+                if (oldString864 instanceof Utf8) {
+                    charSequence864 = (decoder).readString(((Utf8) oldString864));
+                } else {
+                    charSequence864 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, charSequence864);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F864': "+ unionIndex864));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex865 = (decoder.readIndex());
+        if (unionIndex865 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, null);
+        } else {
+            if (unionIndex865 == 1) {
+                Utf8 charSequence865;
+                Object oldString865 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(865);
+                if (oldString865 instanceof Utf8) {
+                    charSequence865 = (decoder).readString(((Utf8) oldString865));
+                } else {
+                    charSequence865 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, charSequence865);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F865': "+ unionIndex865));
+            }
+        }
+        int unionIndex866 = (decoder.readIndex());
+        if (unionIndex866 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, null);
+        } else {
+            if (unionIndex866 == 1) {
+                Utf8 charSequence866;
+                Object oldString866 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(866);
+                if (oldString866 instanceof Utf8) {
+                    charSequence866 = (decoder).readString(((Utf8) oldString866));
+                } else {
+                    charSequence866 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, charSequence866);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F866': "+ unionIndex866));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex867 = (decoder.readIndex());
+        if (unionIndex867 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, null);
+        } else {
+            if (unionIndex867 == 1) {
+                Utf8 charSequence867;
+                Object oldString867 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(867);
+                if (oldString867 instanceof Utf8) {
+                    charSequence867 = (decoder).readString(((Utf8) oldString867));
+                } else {
+                    charSequence867 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, charSequence867);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F867': "+ unionIndex867));
+            }
+        }
+        int unionIndex868 = (decoder.readIndex());
+        if (unionIndex868 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, null);
+        } else {
+            if (unionIndex868 == 1) {
+                Utf8 charSequence868;
+                Object oldString868 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(868);
+                if (oldString868 instanceof Utf8) {
+                    charSequence868 = (decoder).readString(((Utf8) oldString868));
+                } else {
+                    charSequence868 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, charSequence868);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F868': "+ unionIndex868));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex869 = (decoder.readIndex());
+        if (unionIndex869 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, null);
+        } else {
+            if (unionIndex869 == 1) {
+                Utf8 charSequence869;
+                Object oldString869 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(869);
+                if (oldString869 instanceof Utf8) {
+                    charSequence869 = (decoder).readString(((Utf8) oldString869));
+                } else {
+                    charSequence869 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, charSequence869);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F869': "+ unionIndex869));
+            }
+        }
+        int unionIndex870 = (decoder.readIndex());
+        if (unionIndex870 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, null);
+        } else {
+            if (unionIndex870 == 1) {
+                Utf8 charSequence870;
+                Object oldString870 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(870);
+                if (oldString870 instanceof Utf8) {
+                    charSequence870 = (decoder).readString(((Utf8) oldString870));
+                } else {
+                    charSequence870 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, charSequence870);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F870': "+ unionIndex870));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex871 = (decoder.readIndex());
+        if (unionIndex871 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, null);
+        } else {
+            if (unionIndex871 == 1) {
+                Utf8 charSequence871;
+                Object oldString871 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(871);
+                if (oldString871 instanceof Utf8) {
+                    charSequence871 = (decoder).readString(((Utf8) oldString871));
+                } else {
+                    charSequence871 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, charSequence871);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F871': "+ unionIndex871));
+            }
+        }
+        int unionIndex872 = (decoder.readIndex());
+        if (unionIndex872 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, null);
+        } else {
+            if (unionIndex872 == 1) {
+                Utf8 charSequence872;
+                Object oldString872 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(872);
+                if (oldString872 instanceof Utf8) {
+                    charSequence872 = (decoder).readString(((Utf8) oldString872));
+                } else {
+                    charSequence872 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, charSequence872);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F872': "+ unionIndex872));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex873 = (decoder.readIndex());
+        if (unionIndex873 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, null);
+        } else {
+            if (unionIndex873 == 1) {
+                Utf8 charSequence873;
+                Object oldString873 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(873);
+                if (oldString873 instanceof Utf8) {
+                    charSequence873 = (decoder).readString(((Utf8) oldString873));
+                } else {
+                    charSequence873 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, charSequence873);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F873': "+ unionIndex873));
+            }
+        }
+        int unionIndex874 = (decoder.readIndex());
+        if (unionIndex874 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, null);
+        } else {
+            if (unionIndex874 == 1) {
+                Utf8 charSequence874;
+                Object oldString874 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(874);
+                if (oldString874 instanceof Utf8) {
+                    charSequence874 = (decoder).readString(((Utf8) oldString874));
+                } else {
+                    charSequence874 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, charSequence874);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F874': "+ unionIndex874));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex875 = (decoder.readIndex());
+        if (unionIndex875 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, null);
+        } else {
+            if (unionIndex875 == 1) {
+                Utf8 charSequence875;
+                Object oldString875 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(875);
+                if (oldString875 instanceof Utf8) {
+                    charSequence875 = (decoder).readString(((Utf8) oldString875));
+                } else {
+                    charSequence875 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, charSequence875);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F875': "+ unionIndex875));
+            }
+        }
+        int unionIndex876 = (decoder.readIndex());
+        if (unionIndex876 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, null);
+        } else {
+            if (unionIndex876 == 1) {
+                Utf8 charSequence876;
+                Object oldString876 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(876);
+                if (oldString876 instanceof Utf8) {
+                    charSequence876 = (decoder).readString(((Utf8) oldString876));
+                } else {
+                    charSequence876 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, charSequence876);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F876': "+ unionIndex876));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex877 = (decoder.readIndex());
+        if (unionIndex877 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, null);
+        } else {
+            if (unionIndex877 == 1) {
+                Utf8 charSequence877;
+                Object oldString877 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(877);
+                if (oldString877 instanceof Utf8) {
+                    charSequence877 = (decoder).readString(((Utf8) oldString877));
+                } else {
+                    charSequence877 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, charSequence877);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F877': "+ unionIndex877));
+            }
+        }
+        int unionIndex878 = (decoder.readIndex());
+        if (unionIndex878 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, null);
+        } else {
+            if (unionIndex878 == 1) {
+                Utf8 charSequence878;
+                Object oldString878 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(878);
+                if (oldString878 instanceof Utf8) {
+                    charSequence878 = (decoder).readString(((Utf8) oldString878));
+                } else {
+                    charSequence878 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, charSequence878);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F878': "+ unionIndex878));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex879 = (decoder.readIndex());
+        if (unionIndex879 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, null);
+        } else {
+            if (unionIndex879 == 1) {
+                Utf8 charSequence879;
+                Object oldString879 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(879);
+                if (oldString879 instanceof Utf8) {
+                    charSequence879 = (decoder).readString(((Utf8) oldString879));
+                } else {
+                    charSequence879 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, charSequence879);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F879': "+ unionIndex879));
+            }
+        }
+        int unionIndex880 = (decoder.readIndex());
+        if (unionIndex880 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, null);
+        } else {
+            if (unionIndex880 == 1) {
+                Utf8 charSequence880;
+                Object oldString880 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(880);
+                if (oldString880 instanceof Utf8) {
+                    charSequence880 = (decoder).readString(((Utf8) oldString880));
+                } else {
+                    charSequence880 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, charSequence880);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F880': "+ unionIndex880));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex881 = (decoder.readIndex());
+        if (unionIndex881 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, null);
+        } else {
+            if (unionIndex881 == 1) {
+                Utf8 charSequence881;
+                Object oldString881 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(881);
+                if (oldString881 instanceof Utf8) {
+                    charSequence881 = (decoder).readString(((Utf8) oldString881));
+                } else {
+                    charSequence881 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, charSequence881);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F881': "+ unionIndex881));
+            }
+        }
+        int unionIndex882 = (decoder.readIndex());
+        if (unionIndex882 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, null);
+        } else {
+            if (unionIndex882 == 1) {
+                Utf8 charSequence882;
+                Object oldString882 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(882);
+                if (oldString882 instanceof Utf8) {
+                    charSequence882 = (decoder).readString(((Utf8) oldString882));
+                } else {
+                    charSequence882 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, charSequence882);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F882': "+ unionIndex882));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex883 = (decoder.readIndex());
+        if (unionIndex883 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, null);
+        } else {
+            if (unionIndex883 == 1) {
+                Utf8 charSequence883;
+                Object oldString883 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(883);
+                if (oldString883 instanceof Utf8) {
+                    charSequence883 = (decoder).readString(((Utf8) oldString883));
+                } else {
+                    charSequence883 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, charSequence883);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F883': "+ unionIndex883));
+            }
+        }
+        int unionIndex884 = (decoder.readIndex());
+        if (unionIndex884 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, null);
+        } else {
+            if (unionIndex884 == 1) {
+                Utf8 charSequence884;
+                Object oldString884 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(884);
+                if (oldString884 instanceof Utf8) {
+                    charSequence884 = (decoder).readString(((Utf8) oldString884));
+                } else {
+                    charSequence884 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, charSequence884);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F884': "+ unionIndex884));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex885 = (decoder.readIndex());
+        if (unionIndex885 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, null);
+        } else {
+            if (unionIndex885 == 1) {
+                Utf8 charSequence885;
+                Object oldString885 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(885);
+                if (oldString885 instanceof Utf8) {
+                    charSequence885 = (decoder).readString(((Utf8) oldString885));
+                } else {
+                    charSequence885 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, charSequence885);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F885': "+ unionIndex885));
+            }
+        }
+        int unionIndex886 = (decoder.readIndex());
+        if (unionIndex886 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, null);
+        } else {
+            if (unionIndex886 == 1) {
+                Utf8 charSequence886;
+                Object oldString886 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(886);
+                if (oldString886 instanceof Utf8) {
+                    charSequence886 = (decoder).readString(((Utf8) oldString886));
+                } else {
+                    charSequence886 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, charSequence886);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F886': "+ unionIndex886));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex887 = (decoder.readIndex());
+        if (unionIndex887 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, null);
+        } else {
+            if (unionIndex887 == 1) {
+                Utf8 charSequence887;
+                Object oldString887 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(887);
+                if (oldString887 instanceof Utf8) {
+                    charSequence887 = (decoder).readString(((Utf8) oldString887));
+                } else {
+                    charSequence887 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, charSequence887);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F887': "+ unionIndex887));
+            }
+        }
+        int unionIndex888 = (decoder.readIndex());
+        if (unionIndex888 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, null);
+        } else {
+            if (unionIndex888 == 1) {
+                Utf8 charSequence888;
+                Object oldString888 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(888);
+                if (oldString888 instanceof Utf8) {
+                    charSequence888 = (decoder).readString(((Utf8) oldString888));
+                } else {
+                    charSequence888 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, charSequence888);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F888': "+ unionIndex888));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex889 = (decoder.readIndex());
+        if (unionIndex889 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, null);
+        } else {
+            if (unionIndex889 == 1) {
+                Utf8 charSequence889;
+                Object oldString889 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(889);
+                if (oldString889 instanceof Utf8) {
+                    charSequence889 = (decoder).readString(((Utf8) oldString889));
+                } else {
+                    charSequence889 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, charSequence889);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F889': "+ unionIndex889));
+            }
+        }
+        int unionIndex890 = (decoder.readIndex());
+        if (unionIndex890 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, null);
+        } else {
+            if (unionIndex890 == 1) {
+                Utf8 charSequence890;
+                Object oldString890 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(890);
+                if (oldString890 instanceof Utf8) {
+                    charSequence890 = (decoder).readString(((Utf8) oldString890));
+                } else {
+                    charSequence890 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, charSequence890);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F890': "+ unionIndex890));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex891 = (decoder.readIndex());
+        if (unionIndex891 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, null);
+        } else {
+            if (unionIndex891 == 1) {
+                Utf8 charSequence891;
+                Object oldString891 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(891);
+                if (oldString891 instanceof Utf8) {
+                    charSequence891 = (decoder).readString(((Utf8) oldString891));
+                } else {
+                    charSequence891 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, charSequence891);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F891': "+ unionIndex891));
+            }
+        }
+        int unionIndex892 = (decoder.readIndex());
+        if (unionIndex892 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, null);
+        } else {
+            if (unionIndex892 == 1) {
+                Utf8 charSequence892;
+                Object oldString892 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(892);
+                if (oldString892 instanceof Utf8) {
+                    charSequence892 = (decoder).readString(((Utf8) oldString892));
+                } else {
+                    charSequence892 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, charSequence892);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F892': "+ unionIndex892));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex893 = (decoder.readIndex());
+        if (unionIndex893 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, null);
+        } else {
+            if (unionIndex893 == 1) {
+                Utf8 charSequence893;
+                Object oldString893 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(893);
+                if (oldString893 instanceof Utf8) {
+                    charSequence893 = (decoder).readString(((Utf8) oldString893));
+                } else {
+                    charSequence893 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, charSequence893);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F893': "+ unionIndex893));
+            }
+        }
+        int unionIndex894 = (decoder.readIndex());
+        if (unionIndex894 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, null);
+        } else {
+            if (unionIndex894 == 1) {
+                Utf8 charSequence894;
+                Object oldString894 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(894);
+                if (oldString894 instanceof Utf8) {
+                    charSequence894 = (decoder).readString(((Utf8) oldString894));
+                } else {
+                    charSequence894 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, charSequence894);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F894': "+ unionIndex894));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex895 = (decoder.readIndex());
+        if (unionIndex895 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, null);
+        } else {
+            if (unionIndex895 == 1) {
+                Utf8 charSequence895;
+                Object oldString895 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(895);
+                if (oldString895 instanceof Utf8) {
+                    charSequence895 = (decoder).readString(((Utf8) oldString895));
+                } else {
+                    charSequence895 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, charSequence895);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F895': "+ unionIndex895));
+            }
+        }
+        int unionIndex896 = (decoder.readIndex());
+        if (unionIndex896 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, null);
+        } else {
+            if (unionIndex896 == 1) {
+                Utf8 charSequence896;
+                Object oldString896 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(896);
+                if (oldString896 instanceof Utf8) {
+                    charSequence896 = (decoder).readString(((Utf8) oldString896));
+                } else {
+                    charSequence896 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, charSequence896);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F896': "+ unionIndex896));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex897 = (decoder.readIndex());
+        if (unionIndex897 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, null);
+        } else {
+            if (unionIndex897 == 1) {
+                Utf8 charSequence897;
+                Object oldString897 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(897);
+                if (oldString897 instanceof Utf8) {
+                    charSequence897 = (decoder).readString(((Utf8) oldString897));
+                } else {
+                    charSequence897 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, charSequence897);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F897': "+ unionIndex897));
+            }
+        }
+        int unionIndex898 = (decoder.readIndex());
+        if (unionIndex898 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, null);
+        } else {
+            if (unionIndex898 == 1) {
+                Utf8 charSequence898;
+                Object oldString898 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(898);
+                if (oldString898 instanceof Utf8) {
+                    charSequence898 = (decoder).readString(((Utf8) oldString898));
+                } else {
+                    charSequence898 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, charSequence898);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F898': "+ unionIndex898));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex899 = (decoder.readIndex());
+        if (unionIndex899 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, null);
+        } else {
+            if (unionIndex899 == 1) {
+                Utf8 charSequence899;
+                Object oldString899 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(899);
+                if (oldString899 instanceof Utf8) {
+                    charSequence899 = (decoder).readString(((Utf8) oldString899));
+                } else {
+                    charSequence899 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, charSequence899);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F899': "+ unionIndex899));
+            }
+        }
+        int unionIndex900 = (decoder.readIndex());
+        if (unionIndex900 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, null);
+        } else {
+            if (unionIndex900 == 1) {
+                Utf8 charSequence900;
+                Object oldString900 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(900);
+                if (oldString900 instanceof Utf8) {
+                    charSequence900 = (decoder).readString(((Utf8) oldString900));
+                } else {
+                    charSequence900 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, charSequence900);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F900': "+ unionIndex900));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex901 = (decoder.readIndex());
+        if (unionIndex901 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, null);
+        } else {
+            if (unionIndex901 == 1) {
+                Utf8 charSequence901;
+                Object oldString901 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(901);
+                if (oldString901 instanceof Utf8) {
+                    charSequence901 = (decoder).readString(((Utf8) oldString901));
+                } else {
+                    charSequence901 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, charSequence901);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F901': "+ unionIndex901));
+            }
+        }
+        int unionIndex902 = (decoder.readIndex());
+        if (unionIndex902 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, null);
+        } else {
+            if (unionIndex902 == 1) {
+                Utf8 charSequence902;
+                Object oldString902 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(902);
+                if (oldString902 instanceof Utf8) {
+                    charSequence902 = (decoder).readString(((Utf8) oldString902));
+                } else {
+                    charSequence902 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, charSequence902);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F902': "+ unionIndex902));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex903 = (decoder.readIndex());
+        if (unionIndex903 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, null);
+        } else {
+            if (unionIndex903 == 1) {
+                Utf8 charSequence903;
+                Object oldString903 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(903);
+                if (oldString903 instanceof Utf8) {
+                    charSequence903 = (decoder).readString(((Utf8) oldString903));
+                } else {
+                    charSequence903 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, charSequence903);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F903': "+ unionIndex903));
+            }
+        }
+        int unionIndex904 = (decoder.readIndex());
+        if (unionIndex904 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, null);
+        } else {
+            if (unionIndex904 == 1) {
+                Utf8 charSequence904;
+                Object oldString904 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(904);
+                if (oldString904 instanceof Utf8) {
+                    charSequence904 = (decoder).readString(((Utf8) oldString904));
+                } else {
+                    charSequence904 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, charSequence904);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F904': "+ unionIndex904));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex905 = (decoder.readIndex());
+        if (unionIndex905 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, null);
+        } else {
+            if (unionIndex905 == 1) {
+                Utf8 charSequence905;
+                Object oldString905 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(905);
+                if (oldString905 instanceof Utf8) {
+                    charSequence905 = (decoder).readString(((Utf8) oldString905));
+                } else {
+                    charSequence905 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, charSequence905);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F905': "+ unionIndex905));
+            }
+        }
+        int unionIndex906 = (decoder.readIndex());
+        if (unionIndex906 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, null);
+        } else {
+            if (unionIndex906 == 1) {
+                Utf8 charSequence906;
+                Object oldString906 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(906);
+                if (oldString906 instanceof Utf8) {
+                    charSequence906 = (decoder).readString(((Utf8) oldString906));
+                } else {
+                    charSequence906 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, charSequence906);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F906': "+ unionIndex906));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex907 = (decoder.readIndex());
+        if (unionIndex907 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, null);
+        } else {
+            if (unionIndex907 == 1) {
+                Utf8 charSequence907;
+                Object oldString907 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(907);
+                if (oldString907 instanceof Utf8) {
+                    charSequence907 = (decoder).readString(((Utf8) oldString907));
+                } else {
+                    charSequence907 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, charSequence907);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F907': "+ unionIndex907));
+            }
+        }
+        int unionIndex908 = (decoder.readIndex());
+        if (unionIndex908 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, null);
+        } else {
+            if (unionIndex908 == 1) {
+                Utf8 charSequence908;
+                Object oldString908 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(908);
+                if (oldString908 instanceof Utf8) {
+                    charSequence908 = (decoder).readString(((Utf8) oldString908));
+                } else {
+                    charSequence908 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, charSequence908);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F908': "+ unionIndex908));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex909 = (decoder.readIndex());
+        if (unionIndex909 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, null);
+        } else {
+            if (unionIndex909 == 1) {
+                Utf8 charSequence909;
+                Object oldString909 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(909);
+                if (oldString909 instanceof Utf8) {
+                    charSequence909 = (decoder).readString(((Utf8) oldString909));
+                } else {
+                    charSequence909 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, charSequence909);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F909': "+ unionIndex909));
+            }
+        }
+        int unionIndex910 = (decoder.readIndex());
+        if (unionIndex910 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, null);
+        } else {
+            if (unionIndex910 == 1) {
+                Utf8 charSequence910;
+                Object oldString910 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(910);
+                if (oldString910 instanceof Utf8) {
+                    charSequence910 = (decoder).readString(((Utf8) oldString910));
+                } else {
+                    charSequence910 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, charSequence910);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F910': "+ unionIndex910));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex911 = (decoder.readIndex());
+        if (unionIndex911 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, null);
+        } else {
+            if (unionIndex911 == 1) {
+                Utf8 charSequence911;
+                Object oldString911 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(911);
+                if (oldString911 instanceof Utf8) {
+                    charSequence911 = (decoder).readString(((Utf8) oldString911));
+                } else {
+                    charSequence911 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, charSequence911);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F911': "+ unionIndex911));
+            }
+        }
+        int unionIndex912 = (decoder.readIndex());
+        if (unionIndex912 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, null);
+        } else {
+            if (unionIndex912 == 1) {
+                Utf8 charSequence912;
+                Object oldString912 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(912);
+                if (oldString912 instanceof Utf8) {
+                    charSequence912 = (decoder).readString(((Utf8) oldString912));
+                } else {
+                    charSequence912 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, charSequence912);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F912': "+ unionIndex912));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex913 = (decoder.readIndex());
+        if (unionIndex913 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, null);
+        } else {
+            if (unionIndex913 == 1) {
+                Utf8 charSequence913;
+                Object oldString913 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(913);
+                if (oldString913 instanceof Utf8) {
+                    charSequence913 = (decoder).readString(((Utf8) oldString913));
+                } else {
+                    charSequence913 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, charSequence913);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F913': "+ unionIndex913));
+            }
+        }
+        int unionIndex914 = (decoder.readIndex());
+        if (unionIndex914 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, null);
+        } else {
+            if (unionIndex914 == 1) {
+                Utf8 charSequence914;
+                Object oldString914 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(914);
+                if (oldString914 instanceof Utf8) {
+                    charSequence914 = (decoder).readString(((Utf8) oldString914));
+                } else {
+                    charSequence914 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, charSequence914);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F914': "+ unionIndex914));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex915 = (decoder.readIndex());
+        if (unionIndex915 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, null);
+        } else {
+            if (unionIndex915 == 1) {
+                Utf8 charSequence915;
+                Object oldString915 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(915);
+                if (oldString915 instanceof Utf8) {
+                    charSequence915 = (decoder).readString(((Utf8) oldString915));
+                } else {
+                    charSequence915 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, charSequence915);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F915': "+ unionIndex915));
+            }
+        }
+        int unionIndex916 = (decoder.readIndex());
+        if (unionIndex916 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, null);
+        } else {
+            if (unionIndex916 == 1) {
+                Utf8 charSequence916;
+                Object oldString916 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(916);
+                if (oldString916 instanceof Utf8) {
+                    charSequence916 = (decoder).readString(((Utf8) oldString916));
+                } else {
+                    charSequence916 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, charSequence916);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F916': "+ unionIndex916));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex917 = (decoder.readIndex());
+        if (unionIndex917 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, null);
+        } else {
+            if (unionIndex917 == 1) {
+                Utf8 charSequence917;
+                Object oldString917 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(917);
+                if (oldString917 instanceof Utf8) {
+                    charSequence917 = (decoder).readString(((Utf8) oldString917));
+                } else {
+                    charSequence917 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, charSequence917);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F917': "+ unionIndex917));
+            }
+        }
+        int unionIndex918 = (decoder.readIndex());
+        if (unionIndex918 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, null);
+        } else {
+            if (unionIndex918 == 1) {
+                Utf8 charSequence918;
+                Object oldString918 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(918);
+                if (oldString918 instanceof Utf8) {
+                    charSequence918 = (decoder).readString(((Utf8) oldString918));
+                } else {
+                    charSequence918 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, charSequence918);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F918': "+ unionIndex918));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex919 = (decoder.readIndex());
+        if (unionIndex919 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, null);
+        } else {
+            if (unionIndex919 == 1) {
+                Utf8 charSequence919;
+                Object oldString919 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(919);
+                if (oldString919 instanceof Utf8) {
+                    charSequence919 = (decoder).readString(((Utf8) oldString919));
+                } else {
+                    charSequence919 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, charSequence919);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F919': "+ unionIndex919));
+            }
+        }
+        int unionIndex920 = (decoder.readIndex());
+        if (unionIndex920 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, null);
+        } else {
+            if (unionIndex920 == 1) {
+                Utf8 charSequence920;
+                Object oldString920 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(920);
+                if (oldString920 instanceof Utf8) {
+                    charSequence920 = (decoder).readString(((Utf8) oldString920));
+                } else {
+                    charSequence920 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, charSequence920);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F920': "+ unionIndex920));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex921 = (decoder.readIndex());
+        if (unionIndex921 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, null);
+        } else {
+            if (unionIndex921 == 1) {
+                Utf8 charSequence921;
+                Object oldString921 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(921);
+                if (oldString921 instanceof Utf8) {
+                    charSequence921 = (decoder).readString(((Utf8) oldString921));
+                } else {
+                    charSequence921 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, charSequence921);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F921': "+ unionIndex921));
+            }
+        }
+        int unionIndex922 = (decoder.readIndex());
+        if (unionIndex922 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, null);
+        } else {
+            if (unionIndex922 == 1) {
+                Utf8 charSequence922;
+                Object oldString922 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(922);
+                if (oldString922 instanceof Utf8) {
+                    charSequence922 = (decoder).readString(((Utf8) oldString922));
+                } else {
+                    charSequence922 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, charSequence922);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F922': "+ unionIndex922));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex923 = (decoder.readIndex());
+        if (unionIndex923 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, null);
+        } else {
+            if (unionIndex923 == 1) {
+                Utf8 charSequence923;
+                Object oldString923 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(923);
+                if (oldString923 instanceof Utf8) {
+                    charSequence923 = (decoder).readString(((Utf8) oldString923));
+                } else {
+                    charSequence923 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, charSequence923);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F923': "+ unionIndex923));
+            }
+        }
+        int unionIndex924 = (decoder.readIndex());
+        if (unionIndex924 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, null);
+        } else {
+            if (unionIndex924 == 1) {
+                Utf8 charSequence924;
+                Object oldString924 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(924);
+                if (oldString924 instanceof Utf8) {
+                    charSequence924 = (decoder).readString(((Utf8) oldString924));
+                } else {
+                    charSequence924 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, charSequence924);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F924': "+ unionIndex924));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex925 = (decoder.readIndex());
+        if (unionIndex925 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, null);
+        } else {
+            if (unionIndex925 == 1) {
+                Utf8 charSequence925;
+                Object oldString925 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(925);
+                if (oldString925 instanceof Utf8) {
+                    charSequence925 = (decoder).readString(((Utf8) oldString925));
+                } else {
+                    charSequence925 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, charSequence925);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F925': "+ unionIndex925));
+            }
+        }
+        int unionIndex926 = (decoder.readIndex());
+        if (unionIndex926 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, null);
+        } else {
+            if (unionIndex926 == 1) {
+                Utf8 charSequence926;
+                Object oldString926 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(926);
+                if (oldString926 instanceof Utf8) {
+                    charSequence926 = (decoder).readString(((Utf8) oldString926));
+                } else {
+                    charSequence926 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, charSequence926);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F926': "+ unionIndex926));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex927 = (decoder.readIndex());
+        if (unionIndex927 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, null);
+        } else {
+            if (unionIndex927 == 1) {
+                Utf8 charSequence927;
+                Object oldString927 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(927);
+                if (oldString927 instanceof Utf8) {
+                    charSequence927 = (decoder).readString(((Utf8) oldString927));
+                } else {
+                    charSequence927 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, charSequence927);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F927': "+ unionIndex927));
+            }
+        }
+        int unionIndex928 = (decoder.readIndex());
+        if (unionIndex928 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, null);
+        } else {
+            if (unionIndex928 == 1) {
+                Utf8 charSequence928;
+                Object oldString928 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(928);
+                if (oldString928 instanceof Utf8) {
+                    charSequence928 = (decoder).readString(((Utf8) oldString928));
+                } else {
+                    charSequence928 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, charSequence928);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F928': "+ unionIndex928));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex929 = (decoder.readIndex());
+        if (unionIndex929 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, null);
+        } else {
+            if (unionIndex929 == 1) {
+                Utf8 charSequence929;
+                Object oldString929 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(929);
+                if (oldString929 instanceof Utf8) {
+                    charSequence929 = (decoder).readString(((Utf8) oldString929));
+                } else {
+                    charSequence929 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, charSequence929);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F929': "+ unionIndex929));
+            }
+        }
+        int unionIndex930 = (decoder.readIndex());
+        if (unionIndex930 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, null);
+        } else {
+            if (unionIndex930 == 1) {
+                Utf8 charSequence930;
+                Object oldString930 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(930);
+                if (oldString930 instanceof Utf8) {
+                    charSequence930 = (decoder).readString(((Utf8) oldString930));
+                } else {
+                    charSequence930 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, charSequence930);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F930': "+ unionIndex930));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex931 = (decoder.readIndex());
+        if (unionIndex931 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, null);
+        } else {
+            if (unionIndex931 == 1) {
+                Utf8 charSequence931;
+                Object oldString931 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(931);
+                if (oldString931 instanceof Utf8) {
+                    charSequence931 = (decoder).readString(((Utf8) oldString931));
+                } else {
+                    charSequence931 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, charSequence931);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F931': "+ unionIndex931));
+            }
+        }
+        int unionIndex932 = (decoder.readIndex());
+        if (unionIndex932 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, null);
+        } else {
+            if (unionIndex932 == 1) {
+                Utf8 charSequence932;
+                Object oldString932 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(932);
+                if (oldString932 instanceof Utf8) {
+                    charSequence932 = (decoder).readString(((Utf8) oldString932));
+                } else {
+                    charSequence932 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, charSequence932);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F932': "+ unionIndex932));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex933 = (decoder.readIndex());
+        if (unionIndex933 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, null);
+        } else {
+            if (unionIndex933 == 1) {
+                Utf8 charSequence933;
+                Object oldString933 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(933);
+                if (oldString933 instanceof Utf8) {
+                    charSequence933 = (decoder).readString(((Utf8) oldString933));
+                } else {
+                    charSequence933 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, charSequence933);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F933': "+ unionIndex933));
+            }
+        }
+        int unionIndex934 = (decoder.readIndex());
+        if (unionIndex934 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, null);
+        } else {
+            if (unionIndex934 == 1) {
+                Utf8 charSequence934;
+                Object oldString934 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(934);
+                if (oldString934 instanceof Utf8) {
+                    charSequence934 = (decoder).readString(((Utf8) oldString934));
+                } else {
+                    charSequence934 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, charSequence934);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F934': "+ unionIndex934));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex935 = (decoder.readIndex());
+        if (unionIndex935 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, null);
+        } else {
+            if (unionIndex935 == 1) {
+                Utf8 charSequence935;
+                Object oldString935 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(935);
+                if (oldString935 instanceof Utf8) {
+                    charSequence935 = (decoder).readString(((Utf8) oldString935));
+                } else {
+                    charSequence935 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, charSequence935);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F935': "+ unionIndex935));
+            }
+        }
+        int unionIndex936 = (decoder.readIndex());
+        if (unionIndex936 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, null);
+        } else {
+            if (unionIndex936 == 1) {
+                Utf8 charSequence936;
+                Object oldString936 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(936);
+                if (oldString936 instanceof Utf8) {
+                    charSequence936 = (decoder).readString(((Utf8) oldString936));
+                } else {
+                    charSequence936 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, charSequence936);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F936': "+ unionIndex936));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex937 = (decoder.readIndex());
+        if (unionIndex937 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, null);
+        } else {
+            if (unionIndex937 == 1) {
+                Utf8 charSequence937;
+                Object oldString937 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(937);
+                if (oldString937 instanceof Utf8) {
+                    charSequence937 = (decoder).readString(((Utf8) oldString937));
+                } else {
+                    charSequence937 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, charSequence937);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F937': "+ unionIndex937));
+            }
+        }
+        int unionIndex938 = (decoder.readIndex());
+        if (unionIndex938 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, null);
+        } else {
+            if (unionIndex938 == 1) {
+                Utf8 charSequence938;
+                Object oldString938 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(938);
+                if (oldString938 instanceof Utf8) {
+                    charSequence938 = (decoder).readString(((Utf8) oldString938));
+                } else {
+                    charSequence938 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, charSequence938);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F938': "+ unionIndex938));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex939 = (decoder.readIndex());
+        if (unionIndex939 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, null);
+        } else {
+            if (unionIndex939 == 1) {
+                Utf8 charSequence939;
+                Object oldString939 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(939);
+                if (oldString939 instanceof Utf8) {
+                    charSequence939 = (decoder).readString(((Utf8) oldString939));
+                } else {
+                    charSequence939 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, charSequence939);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F939': "+ unionIndex939));
+            }
+        }
+        int unionIndex940 = (decoder.readIndex());
+        if (unionIndex940 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, null);
+        } else {
+            if (unionIndex940 == 1) {
+                Utf8 charSequence940;
+                Object oldString940 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(940);
+                if (oldString940 instanceof Utf8) {
+                    charSequence940 = (decoder).readString(((Utf8) oldString940));
+                } else {
+                    charSequence940 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, charSequence940);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F940': "+ unionIndex940));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex941 = (decoder.readIndex());
+        if (unionIndex941 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, null);
+        } else {
+            if (unionIndex941 == 1) {
+                Utf8 charSequence941;
+                Object oldString941 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(941);
+                if (oldString941 instanceof Utf8) {
+                    charSequence941 = (decoder).readString(((Utf8) oldString941));
+                } else {
+                    charSequence941 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, charSequence941);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F941': "+ unionIndex941));
+            }
+        }
+        int unionIndex942 = (decoder.readIndex());
+        if (unionIndex942 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, null);
+        } else {
+            if (unionIndex942 == 1) {
+                Utf8 charSequence942;
+                Object oldString942 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(942);
+                if (oldString942 instanceof Utf8) {
+                    charSequence942 = (decoder).readString(((Utf8) oldString942));
+                } else {
+                    charSequence942 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, charSequence942);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F942': "+ unionIndex942));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex943 = (decoder.readIndex());
+        if (unionIndex943 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, null);
+        } else {
+            if (unionIndex943 == 1) {
+                Utf8 charSequence943;
+                Object oldString943 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(943);
+                if (oldString943 instanceof Utf8) {
+                    charSequence943 = (decoder).readString(((Utf8) oldString943));
+                } else {
+                    charSequence943 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, charSequence943);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F943': "+ unionIndex943));
+            }
+        }
+        int unionIndex944 = (decoder.readIndex());
+        if (unionIndex944 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, null);
+        } else {
+            if (unionIndex944 == 1) {
+                Utf8 charSequence944;
+                Object oldString944 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(944);
+                if (oldString944 instanceof Utf8) {
+                    charSequence944 = (decoder).readString(((Utf8) oldString944));
+                } else {
+                    charSequence944 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, charSequence944);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F944': "+ unionIndex944));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex945 = (decoder.readIndex());
+        if (unionIndex945 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, null);
+        } else {
+            if (unionIndex945 == 1) {
+                Utf8 charSequence945;
+                Object oldString945 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(945);
+                if (oldString945 instanceof Utf8) {
+                    charSequence945 = (decoder).readString(((Utf8) oldString945));
+                } else {
+                    charSequence945 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, charSequence945);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F945': "+ unionIndex945));
+            }
+        }
+        int unionIndex946 = (decoder.readIndex());
+        if (unionIndex946 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, null);
+        } else {
+            if (unionIndex946 == 1) {
+                Utf8 charSequence946;
+                Object oldString946 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(946);
+                if (oldString946 instanceof Utf8) {
+                    charSequence946 = (decoder).readString(((Utf8) oldString946));
+                } else {
+                    charSequence946 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, charSequence946);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F946': "+ unionIndex946));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex947 = (decoder.readIndex());
+        if (unionIndex947 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, null);
+        } else {
+            if (unionIndex947 == 1) {
+                Utf8 charSequence947;
+                Object oldString947 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(947);
+                if (oldString947 instanceof Utf8) {
+                    charSequence947 = (decoder).readString(((Utf8) oldString947));
+                } else {
+                    charSequence947 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, charSequence947);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F947': "+ unionIndex947));
+            }
+        }
+        int unionIndex948 = (decoder.readIndex());
+        if (unionIndex948 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, null);
+        } else {
+            if (unionIndex948 == 1) {
+                Utf8 charSequence948;
+                Object oldString948 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(948);
+                if (oldString948 instanceof Utf8) {
+                    charSequence948 = (decoder).readString(((Utf8) oldString948));
+                } else {
+                    charSequence948 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, charSequence948);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F948': "+ unionIndex948));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex949 = (decoder.readIndex());
+        if (unionIndex949 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, null);
+        } else {
+            if (unionIndex949 == 1) {
+                Utf8 charSequence949;
+                Object oldString949 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(949);
+                if (oldString949 instanceof Utf8) {
+                    charSequence949 = (decoder).readString(((Utf8) oldString949));
+                } else {
+                    charSequence949 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, charSequence949);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F949': "+ unionIndex949));
+            }
+        }
+        int unionIndex950 = (decoder.readIndex());
+        if (unionIndex950 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, null);
+        } else {
+            if (unionIndex950 == 1) {
+                Utf8 charSequence950;
+                Object oldString950 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(950);
+                if (oldString950 instanceof Utf8) {
+                    charSequence950 = (decoder).readString(((Utf8) oldString950));
+                } else {
+                    charSequence950 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, charSequence950);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F950': "+ unionIndex950));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex951 = (decoder.readIndex());
+        if (unionIndex951 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, null);
+        } else {
+            if (unionIndex951 == 1) {
+                Utf8 charSequence951;
+                Object oldString951 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(951);
+                if (oldString951 instanceof Utf8) {
+                    charSequence951 = (decoder).readString(((Utf8) oldString951));
+                } else {
+                    charSequence951 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, charSequence951);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F951': "+ unionIndex951));
+            }
+        }
+        int unionIndex952 = (decoder.readIndex());
+        if (unionIndex952 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, null);
+        } else {
+            if (unionIndex952 == 1) {
+                Utf8 charSequence952;
+                Object oldString952 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(952);
+                if (oldString952 instanceof Utf8) {
+                    charSequence952 = (decoder).readString(((Utf8) oldString952));
+                } else {
+                    charSequence952 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, charSequence952);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F952': "+ unionIndex952));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex953 = (decoder.readIndex());
+        if (unionIndex953 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, null);
+        } else {
+            if (unionIndex953 == 1) {
+                Utf8 charSequence953;
+                Object oldString953 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(953);
+                if (oldString953 instanceof Utf8) {
+                    charSequence953 = (decoder).readString(((Utf8) oldString953));
+                } else {
+                    charSequence953 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, charSequence953);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F953': "+ unionIndex953));
+            }
+        }
+        int unionIndex954 = (decoder.readIndex());
+        if (unionIndex954 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, null);
+        } else {
+            if (unionIndex954 == 1) {
+                Utf8 charSequence954;
+                Object oldString954 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(954);
+                if (oldString954 instanceof Utf8) {
+                    charSequence954 = (decoder).readString(((Utf8) oldString954));
+                } else {
+                    charSequence954 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, charSequence954);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F954': "+ unionIndex954));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex955 = (decoder.readIndex());
+        if (unionIndex955 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, null);
+        } else {
+            if (unionIndex955 == 1) {
+                Utf8 charSequence955;
+                Object oldString955 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(955);
+                if (oldString955 instanceof Utf8) {
+                    charSequence955 = (decoder).readString(((Utf8) oldString955));
+                } else {
+                    charSequence955 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, charSequence955);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F955': "+ unionIndex955));
+            }
+        }
+        int unionIndex956 = (decoder.readIndex());
+        if (unionIndex956 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, null);
+        } else {
+            if (unionIndex956 == 1) {
+                Utf8 charSequence956;
+                Object oldString956 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(956);
+                if (oldString956 instanceof Utf8) {
+                    charSequence956 = (decoder).readString(((Utf8) oldString956));
+                } else {
+                    charSequence956 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, charSequence956);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F956': "+ unionIndex956));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex957 = (decoder.readIndex());
+        if (unionIndex957 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, null);
+        } else {
+            if (unionIndex957 == 1) {
+                Utf8 charSequence957;
+                Object oldString957 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(957);
+                if (oldString957 instanceof Utf8) {
+                    charSequence957 = (decoder).readString(((Utf8) oldString957));
+                } else {
+                    charSequence957 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, charSequence957);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F957': "+ unionIndex957));
+            }
+        }
+        int unionIndex958 = (decoder.readIndex());
+        if (unionIndex958 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, null);
+        } else {
+            if (unionIndex958 == 1) {
+                Utf8 charSequence958;
+                Object oldString958 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(958);
+                if (oldString958 instanceof Utf8) {
+                    charSequence958 = (decoder).readString(((Utf8) oldString958));
+                } else {
+                    charSequence958 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, charSequence958);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F958': "+ unionIndex958));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex959 = (decoder.readIndex());
+        if (unionIndex959 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, null);
+        } else {
+            if (unionIndex959 == 1) {
+                Utf8 charSequence959;
+                Object oldString959 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(959);
+                if (oldString959 instanceof Utf8) {
+                    charSequence959 = (decoder).readString(((Utf8) oldString959));
+                } else {
+                    charSequence959 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, charSequence959);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F959': "+ unionIndex959));
+            }
+        }
+        int unionIndex960 = (decoder.readIndex());
+        if (unionIndex960 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, null);
+        } else {
+            if (unionIndex960 == 1) {
+                Utf8 charSequence960;
+                Object oldString960 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(960);
+                if (oldString960 instanceof Utf8) {
+                    charSequence960 = (decoder).readString(((Utf8) oldString960));
+                } else {
+                    charSequence960 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, charSequence960);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F960': "+ unionIndex960));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex961 = (decoder.readIndex());
+        if (unionIndex961 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, null);
+        } else {
+            if (unionIndex961 == 1) {
+                Utf8 charSequence961;
+                Object oldString961 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(961);
+                if (oldString961 instanceof Utf8) {
+                    charSequence961 = (decoder).readString(((Utf8) oldString961));
+                } else {
+                    charSequence961 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, charSequence961);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F961': "+ unionIndex961));
+            }
+        }
+        int unionIndex962 = (decoder.readIndex());
+        if (unionIndex962 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, null);
+        } else {
+            if (unionIndex962 == 1) {
+                Utf8 charSequence962;
+                Object oldString962 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(962);
+                if (oldString962 instanceof Utf8) {
+                    charSequence962 = (decoder).readString(((Utf8) oldString962));
+                } else {
+                    charSequence962 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, charSequence962);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F962': "+ unionIndex962));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex963 = (decoder.readIndex());
+        if (unionIndex963 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, null);
+        } else {
+            if (unionIndex963 == 1) {
+                Utf8 charSequence963;
+                Object oldString963 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(963);
+                if (oldString963 instanceof Utf8) {
+                    charSequence963 = (decoder).readString(((Utf8) oldString963));
+                } else {
+                    charSequence963 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, charSequence963);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F963': "+ unionIndex963));
+            }
+        }
+        int unionIndex964 = (decoder.readIndex());
+        if (unionIndex964 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, null);
+        } else {
+            if (unionIndex964 == 1) {
+                Utf8 charSequence964;
+                Object oldString964 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(964);
+                if (oldString964 instanceof Utf8) {
+                    charSequence964 = (decoder).readString(((Utf8) oldString964));
+                } else {
+                    charSequence964 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, charSequence964);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F964': "+ unionIndex964));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex965 = (decoder.readIndex());
+        if (unionIndex965 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, null);
+        } else {
+            if (unionIndex965 == 1) {
+                Utf8 charSequence965;
+                Object oldString965 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(965);
+                if (oldString965 instanceof Utf8) {
+                    charSequence965 = (decoder).readString(((Utf8) oldString965));
+                } else {
+                    charSequence965 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, charSequence965);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F965': "+ unionIndex965));
+            }
+        }
+        int unionIndex966 = (decoder.readIndex());
+        if (unionIndex966 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, null);
+        } else {
+            if (unionIndex966 == 1) {
+                Utf8 charSequence966;
+                Object oldString966 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(966);
+                if (oldString966 instanceof Utf8) {
+                    charSequence966 = (decoder).readString(((Utf8) oldString966));
+                } else {
+                    charSequence966 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, charSequence966);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F966': "+ unionIndex966));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex967 = (decoder.readIndex());
+        if (unionIndex967 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, null);
+        } else {
+            if (unionIndex967 == 1) {
+                Utf8 charSequence967;
+                Object oldString967 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(967);
+                if (oldString967 instanceof Utf8) {
+                    charSequence967 = (decoder).readString(((Utf8) oldString967));
+                } else {
+                    charSequence967 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, charSequence967);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F967': "+ unionIndex967));
+            }
+        }
+        int unionIndex968 = (decoder.readIndex());
+        if (unionIndex968 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, null);
+        } else {
+            if (unionIndex968 == 1) {
+                Utf8 charSequence968;
+                Object oldString968 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(968);
+                if (oldString968 instanceof Utf8) {
+                    charSequence968 = (decoder).readString(((Utf8) oldString968));
+                } else {
+                    charSequence968 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, charSequence968);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F968': "+ unionIndex968));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex969 = (decoder.readIndex());
+        if (unionIndex969 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, null);
+        } else {
+            if (unionIndex969 == 1) {
+                Utf8 charSequence969;
+                Object oldString969 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(969);
+                if (oldString969 instanceof Utf8) {
+                    charSequence969 = (decoder).readString(((Utf8) oldString969));
+                } else {
+                    charSequence969 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, charSequence969);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F969': "+ unionIndex969));
+            }
+        }
+        int unionIndex970 = (decoder.readIndex());
+        if (unionIndex970 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, null);
+        } else {
+            if (unionIndex970 == 1) {
+                Utf8 charSequence970;
+                Object oldString970 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(970);
+                if (oldString970 instanceof Utf8) {
+                    charSequence970 = (decoder).readString(((Utf8) oldString970));
+                } else {
+                    charSequence970 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, charSequence970);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F970': "+ unionIndex970));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex971 = (decoder.readIndex());
+        if (unionIndex971 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, null);
+        } else {
+            if (unionIndex971 == 1) {
+                Utf8 charSequence971;
+                Object oldString971 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(971);
+                if (oldString971 instanceof Utf8) {
+                    charSequence971 = (decoder).readString(((Utf8) oldString971));
+                } else {
+                    charSequence971 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, charSequence971);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F971': "+ unionIndex971));
+            }
+        }
+        int unionIndex972 = (decoder.readIndex());
+        if (unionIndex972 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, null);
+        } else {
+            if (unionIndex972 == 1) {
+                Utf8 charSequence972;
+                Object oldString972 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(972);
+                if (oldString972 instanceof Utf8) {
+                    charSequence972 = (decoder).readString(((Utf8) oldString972));
+                } else {
+                    charSequence972 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, charSequence972);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F972': "+ unionIndex972));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex973 = (decoder.readIndex());
+        if (unionIndex973 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, null);
+        } else {
+            if (unionIndex973 == 1) {
+                Utf8 charSequence973;
+                Object oldString973 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(973);
+                if (oldString973 instanceof Utf8) {
+                    charSequence973 = (decoder).readString(((Utf8) oldString973));
+                } else {
+                    charSequence973 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, charSequence973);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F973': "+ unionIndex973));
+            }
+        }
+        int unionIndex974 = (decoder.readIndex());
+        if (unionIndex974 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, null);
+        } else {
+            if (unionIndex974 == 1) {
+                Utf8 charSequence974;
+                Object oldString974 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(974);
+                if (oldString974 instanceof Utf8) {
+                    charSequence974 = (decoder).readString(((Utf8) oldString974));
+                } else {
+                    charSequence974 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, charSequence974);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F974': "+ unionIndex974));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex975 = (decoder.readIndex());
+        if (unionIndex975 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, null);
+        } else {
+            if (unionIndex975 == 1) {
+                Utf8 charSequence975;
+                Object oldString975 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(975);
+                if (oldString975 instanceof Utf8) {
+                    charSequence975 = (decoder).readString(((Utf8) oldString975));
+                } else {
+                    charSequence975 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, charSequence975);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F975': "+ unionIndex975));
+            }
+        }
+        int unionIndex976 = (decoder.readIndex());
+        if (unionIndex976 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, null);
+        } else {
+            if (unionIndex976 == 1) {
+                Utf8 charSequence976;
+                Object oldString976 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(976);
+                if (oldString976 instanceof Utf8) {
+                    charSequence976 = (decoder).readString(((Utf8) oldString976));
+                } else {
+                    charSequence976 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, charSequence976);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F976': "+ unionIndex976));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex977 = (decoder.readIndex());
+        if (unionIndex977 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, null);
+        } else {
+            if (unionIndex977 == 1) {
+                Utf8 charSequence977;
+                Object oldString977 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(977);
+                if (oldString977 instanceof Utf8) {
+                    charSequence977 = (decoder).readString(((Utf8) oldString977));
+                } else {
+                    charSequence977 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, charSequence977);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F977': "+ unionIndex977));
+            }
+        }
+        int unionIndex978 = (decoder.readIndex());
+        if (unionIndex978 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, null);
+        } else {
+            if (unionIndex978 == 1) {
+                Utf8 charSequence978;
+                Object oldString978 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(978);
+                if (oldString978 instanceof Utf8) {
+                    charSequence978 = (decoder).readString(((Utf8) oldString978));
+                } else {
+                    charSequence978 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, charSequence978);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F978': "+ unionIndex978));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex979 = (decoder.readIndex());
+        if (unionIndex979 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, null);
+        } else {
+            if (unionIndex979 == 1) {
+                Utf8 charSequence979;
+                Object oldString979 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(979);
+                if (oldString979 instanceof Utf8) {
+                    charSequence979 = (decoder).readString(((Utf8) oldString979));
+                } else {
+                    charSequence979 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, charSequence979);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F979': "+ unionIndex979));
+            }
+        }
+        int unionIndex980 = (decoder.readIndex());
+        if (unionIndex980 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, null);
+        } else {
+            if (unionIndex980 == 1) {
+                Utf8 charSequence980;
+                Object oldString980 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(980);
+                if (oldString980 instanceof Utf8) {
+                    charSequence980 = (decoder).readString(((Utf8) oldString980));
+                } else {
+                    charSequence980 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, charSequence980);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F980': "+ unionIndex980));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex981 = (decoder.readIndex());
+        if (unionIndex981 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, null);
+        } else {
+            if (unionIndex981 == 1) {
+                Utf8 charSequence981;
+                Object oldString981 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(981);
+                if (oldString981 instanceof Utf8) {
+                    charSequence981 = (decoder).readString(((Utf8) oldString981));
+                } else {
+                    charSequence981 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, charSequence981);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F981': "+ unionIndex981));
+            }
+        }
+        int unionIndex982 = (decoder.readIndex());
+        if (unionIndex982 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, null);
+        } else {
+            if (unionIndex982 == 1) {
+                Utf8 charSequence982;
+                Object oldString982 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(982);
+                if (oldString982 instanceof Utf8) {
+                    charSequence982 = (decoder).readString(((Utf8) oldString982));
+                } else {
+                    charSequence982 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, charSequence982);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F982': "+ unionIndex982));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex983 = (decoder.readIndex());
+        if (unionIndex983 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, null);
+        } else {
+            if (unionIndex983 == 1) {
+                Utf8 charSequence983;
+                Object oldString983 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(983);
+                if (oldString983 instanceof Utf8) {
+                    charSequence983 = (decoder).readString(((Utf8) oldString983));
+                } else {
+                    charSequence983 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, charSequence983);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F983': "+ unionIndex983));
+            }
+        }
+        int unionIndex984 = (decoder.readIndex());
+        if (unionIndex984 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, null);
+        } else {
+            if (unionIndex984 == 1) {
+                Utf8 charSequence984;
+                Object oldString984 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(984);
+                if (oldString984 instanceof Utf8) {
+                    charSequence984 = (decoder).readString(((Utf8) oldString984));
+                } else {
+                    charSequence984 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, charSequence984);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F984': "+ unionIndex984));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex985 = (decoder.readIndex());
+        if (unionIndex985 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, null);
+        } else {
+            if (unionIndex985 == 1) {
+                Utf8 charSequence985;
+                Object oldString985 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(985);
+                if (oldString985 instanceof Utf8) {
+                    charSequence985 = (decoder).readString(((Utf8) oldString985));
+                } else {
+                    charSequence985 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, charSequence985);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F985': "+ unionIndex985));
+            }
+        }
+        int unionIndex986 = (decoder.readIndex());
+        if (unionIndex986 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, null);
+        } else {
+            if (unionIndex986 == 1) {
+                Utf8 charSequence986;
+                Object oldString986 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(986);
+                if (oldString986 instanceof Utf8) {
+                    charSequence986 = (decoder).readString(((Utf8) oldString986));
+                } else {
+                    charSequence986 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, charSequence986);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F986': "+ unionIndex986));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex987 = (decoder.readIndex());
+        if (unionIndex987 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, null);
+        } else {
+            if (unionIndex987 == 1) {
+                Utf8 charSequence987;
+                Object oldString987 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(987);
+                if (oldString987 instanceof Utf8) {
+                    charSequence987 = (decoder).readString(((Utf8) oldString987));
+                } else {
+                    charSequence987 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, charSequence987);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F987': "+ unionIndex987));
+            }
+        }
+        int unionIndex988 = (decoder.readIndex());
+        if (unionIndex988 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, null);
+        } else {
+            if (unionIndex988 == 1) {
+                Utf8 charSequence988;
+                Object oldString988 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(988);
+                if (oldString988 instanceof Utf8) {
+                    charSequence988 = (decoder).readString(((Utf8) oldString988));
+                } else {
+                    charSequence988 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, charSequence988);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F988': "+ unionIndex988));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex989 = (decoder.readIndex());
+        if (unionIndex989 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, null);
+        } else {
+            if (unionIndex989 == 1) {
+                Utf8 charSequence989;
+                Object oldString989 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(989);
+                if (oldString989 instanceof Utf8) {
+                    charSequence989 = (decoder).readString(((Utf8) oldString989));
+                } else {
+                    charSequence989 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, charSequence989);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F989': "+ unionIndex989));
+            }
+        }
+        int unionIndex990 = (decoder.readIndex());
+        if (unionIndex990 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, null);
+        } else {
+            if (unionIndex990 == 1) {
+                Utf8 charSequence990;
+                Object oldString990 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(990);
+                if (oldString990 instanceof Utf8) {
+                    charSequence990 = (decoder).readString(((Utf8) oldString990));
+                } else {
+                    charSequence990 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, charSequence990);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F990': "+ unionIndex990));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex991 = (decoder.readIndex());
+        if (unionIndex991 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, null);
+        } else {
+            if (unionIndex991 == 1) {
+                Utf8 charSequence991;
+                Object oldString991 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(991);
+                if (oldString991 instanceof Utf8) {
+                    charSequence991 = (decoder).readString(((Utf8) oldString991));
+                } else {
+                    charSequence991 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, charSequence991);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F991': "+ unionIndex991));
+            }
+        }
+        int unionIndex992 = (decoder.readIndex());
+        if (unionIndex992 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, null);
+        } else {
+            if (unionIndex992 == 1) {
+                Utf8 charSequence992;
+                Object oldString992 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(992);
+                if (oldString992 instanceof Utf8) {
+                    charSequence992 = (decoder).readString(((Utf8) oldString992));
+                } else {
+                    charSequence992 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, charSequence992);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F992': "+ unionIndex992));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex993 = (decoder.readIndex());
+        if (unionIndex993 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, null);
+        } else {
+            if (unionIndex993 == 1) {
+                Utf8 charSequence993;
+                Object oldString993 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(993);
+                if (oldString993 instanceof Utf8) {
+                    charSequence993 = (decoder).readString(((Utf8) oldString993));
+                } else {
+                    charSequence993 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, charSequence993);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F993': "+ unionIndex993));
+            }
+        }
+        int unionIndex994 = (decoder.readIndex());
+        if (unionIndex994 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, null);
+        } else {
+            if (unionIndex994 == 1) {
+                Utf8 charSequence994;
+                Object oldString994 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(994);
+                if (oldString994 instanceof Utf8) {
+                    charSequence994 = (decoder).readString(((Utf8) oldString994));
+                } else {
+                    charSequence994 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, charSequence994);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F994': "+ unionIndex994));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex995 = (decoder.readIndex());
+        if (unionIndex995 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, null);
+        } else {
+            if (unionIndex995 == 1) {
+                Utf8 charSequence995;
+                Object oldString995 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(995);
+                if (oldString995 instanceof Utf8) {
+                    charSequence995 = (decoder).readString(((Utf8) oldString995));
+                } else {
+                    charSequence995 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, charSequence995);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F995': "+ unionIndex995));
+            }
+        }
+        int unionIndex996 = (decoder.readIndex());
+        if (unionIndex996 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, null);
+        } else {
+            if (unionIndex996 == 1) {
+                Utf8 charSequence996;
+                Object oldString996 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(996);
+                if (oldString996 instanceof Utf8) {
+                    charSequence996 = (decoder).readString(((Utf8) oldString996));
+                } else {
+                    charSequence996 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, charSequence996);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F996': "+ unionIndex996));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex997 = (decoder.readIndex());
+        if (unionIndex997 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, null);
+        } else {
+            if (unionIndex997 == 1) {
+                Utf8 charSequence997;
+                Object oldString997 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(997);
+                if (oldString997 instanceof Utf8) {
+                    charSequence997 = (decoder).readString(((Utf8) oldString997));
+                } else {
+                    charSequence997 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, charSequence997);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F997': "+ unionIndex997));
+            }
+        }
+        int unionIndex998 = (decoder.readIndex());
+        if (unionIndex998 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, null);
+        } else {
+            if (unionIndex998 == 1) {
+                Utf8 charSequence998;
+                Object oldString998 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(998);
+                if (oldString998 instanceof Utf8) {
+                    charSequence998 = (decoder).readString(((Utf8) oldString998));
+                } else {
+                    charSequence998 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, charSequence998);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F998': "+ unionIndex998));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex999 = (decoder.readIndex());
+        if (unionIndex999 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, null);
+        } else {
+            if (unionIndex999 == 1) {
+                Utf8 charSequence999;
+                Object oldString999 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(999);
+                if (oldString999 instanceof Utf8) {
+                    charSequence999 = (decoder).readString(((Utf8) oldString999));
+                } else {
+                    charSequence999 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, charSequence999);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F999': "+ unionIndex999));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
new file mode 100644
index 000000000..6ab3b9e0b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testString0;
+    private final Schema testStringUnionAlias0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testString0 = readerSchema.getField("testString").schema();
+        this.testStringUnionAlias0 = readerSchema.getField("testStringUnionAlias").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testString': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0((FastGenericDeserializerGeneratorTest_shouldReadAliasedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnionAlias': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
new file mode 100644
index 000000000..4ca262df9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
@@ -0,0 +1,122 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Schema testEnumUnion0;
+    private final Schema testEnumArray0;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(0, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                testEnumArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        testEnumUnionArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
new file mode 100644
index 000000000..8aa57c89b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testFixed0;
+    private final Schema testFixedUnion0;
+    private final Schema testFixedArray0;
+    private final Schema testFixedUnionArray0;
+    private final Schema testFixedUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testFixed0 = readerSchema.getField("testFixed").schema();
+        this.testFixedUnion0 = readerSchema.getField("testFixedUnion").schema();
+        this.testFixedArray0 = readerSchema.getField("testFixedArray").schema();
+        this.testFixedUnionArray0 = readerSchema.getField("testFixedUnionArray").schema();
+        this.testFixedUnionArrayArrayElemSchema0 = testFixedUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        byte[] testFixed1;
+        Object oldFixed0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(0);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (2))) {
+            testFixed1 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed1 = ( new byte[2]);
+        }
+        decoder.readFixed(testFixed1);
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(0, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed1));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadFixed;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(1);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (2))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed2);
+                FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed2));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericFixed> testFixedArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(2);
+        if (oldArray0 instanceof List) {
+            testFixedArray1 = ((List) oldArray0);
+            testFixedArray1 .clear();
+        } else {
+            testFixedArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen0), testFixedArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed3;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (2))) {
+                    testFixed3 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed3 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed3);
+                testFixedArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed3));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(2, testFixedArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(3);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray1 = ((List) oldArray1);
+            testFixedUnionArray1 .clear();
+        } else {
+            testFixedUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen1), testFixedUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        byte[] testFixed4;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (2))) {
+                            testFixed4 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed4 = ( new byte[2]);
+                        }
+                        decoder.readFixed(testFixed4);
+                        testFixedUnionArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed4));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(3, testFixedUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
new file mode 100644
index 000000000..2d4a9a3c5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
@@ -0,0 +1,102 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema union0;
+    private final Schema unionOptionSchema0;
+    private final Schema subField0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.union0 = readerSchema.getField("union").schema();
+        this.unionOptionSchema0 = union0 .getTypes().get(1);
+        this.subField0 = unionOptionSchema0 .getField("subField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence1;
+                    Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0);
+                    if (oldString1 instanceof Utf8) {
+                        charSequence1 = (decoder).readString(((Utf8) oldString1));
+                    } else {
+                        charSequence1 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, charSequence1);
+                } else {
+                    if (unionIndex0 == 3) {
+                        FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+                    }
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(unionOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
new file mode 100644
index 000000000..efcf27248
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
@@ -0,0 +1,129 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapField0;
+    private final Schema mapFieldMapValueSchema0;
+    private final Schema mapFieldValueMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapField0 = readerSchema.getField("mapField").schema();
+        this.mapFieldMapValueSchema0 = mapField0 .getValueType();
+        this.mapFieldValueMapValueSchema0 = mapFieldMapValueSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Map<Utf8, List<Integer>>> mapField1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
+                if (oldMap0 instanceof Map) {
+                    mapFieldReuse0 = ((Map) oldMap0);
+                }
+                if (mapFieldReuse0 != (null)) {
+                    mapFieldReuse0 .clear();
+                    mapField1 = mapFieldReuse0;
+                } else {
+                    mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Map<Utf8, List<Integer>> mapFieldValue0 = null;
+                    long chunkLen1 = (decoder.readMapStart());
+                    if (chunkLen1 > 0) {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, ((int) chunkLen1)));
+                        } else {
+                            Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
+                            if (null instanceof Map) {
+                                mapFieldValueReuse0 = ((Map) null);
+                            }
+                            if (mapFieldValueReuse0 != (null)) {
+                                mapFieldValueReuse0 .clear();
+                                mapFieldValue0 = mapFieldValueReuse0;
+                            } else {
+                                mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                            }
+                        }
+                        do {
+                            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                                Utf8 key1 = (decoder.readString(null));
+                                PrimitiveIntList mapFieldValueValue0 = null;
+                                long chunkLen2 = (decoder.readArrayStart());
+                                if (null instanceof PrimitiveIntList) {
+                                    mapFieldValueValue0 = ((PrimitiveIntList) null);
+                                    mapFieldValueValue0 .clear();
+                                } else {
+                                    mapFieldValueValue0 = new PrimitiveIntArrayList(((int) chunkLen2));
+                                }
+                                while (chunkLen2 > 0) {
+                                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                                        mapFieldValueValue0 .addPrimitive((decoder.readInt()));
+                                    }
+                                    chunkLen2 = (decoder.arrayNext());
+                                }
+                                mapFieldValue0 .put(key1, mapFieldValueValue0);
+                            }
+                            chunkLen1 = (decoder.mapNext());
+                        } while (chunkLen1 > 0);
+                    } else {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, 0));
+                        } else {
+                            mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+                        }
+                    }
+                    mapField1 .put(key0, mapFieldValue0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), 0));
+            } else {
+                mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadNestedMap.put(0, mapField1);
+        return FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
new file mode 100644
index 000000000..d79b1d246
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
@@ -0,0 +1,206 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(1));
+        tempEnumMapping0 .put(new Integer(1), new Integer(0));
+        tempEnumMapping0 .put(new Integer(2), new Integer(4));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(1));
+        tempEnumMapping1 .put(new Integer(1), new Integer(0));
+        tempEnumMapping1 .put(new Integer(2), new Integer(4));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(1));
+        tempEnumMapping2 .put(new Integer(1), new Integer(0));
+        tempEnumMapping2 .put(new Integer(2), new Integer(4));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(1));
+        tempEnumMapping3 .put(new Integer(1), new Integer(0));
+        tempEnumMapping3 .put(new Integer(2), new Integer(4));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
new file mode 100644
index 000000000..dfaf77cc7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
@@ -0,0 +1,209 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testIntUnion0;
+    private final Schema testStringUnion0;
+    private final Schema testLongUnion0;
+    private final Schema testDoubleUnion0;
+    private final Schema testFloatUnion0;
+    private final Schema testBooleanUnion0;
+    private final Schema testBytesUnion0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testIntUnion0 = readerSchema.getField("testIntUnion").schema();
+        this.testStringUnion0 = readerSchema.getField("testStringUnion").schema();
+        this.testLongUnion0 = readerSchema.getField("testLongUnion").schema();
+        this.testDoubleUnion0 = readerSchema.getField("testDoubleUnion").schema();
+        this.testFloatUnion0 = readerSchema.getField("testFloatUnion").schema();
+        this.testBooleanUnion0 = readerSchema.getField("testBooleanUnion").schema();
+        this.testBytesUnion0 = readerSchema.getField("testBytesUnion").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(0, (decoder.readInt()));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(2);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(2, charSequence0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(3);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex1));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(4, (decoder.readLong()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(6, (decoder.readDouble()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(8, (decoder.readFloat()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(10, (decoder.readBoolean()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(12);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(12, byteBuffer0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(13);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
new file mode 100644
index 000000000..764d886ab
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
@@ -0,0 +1,160 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema intFieldField0;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.intFieldField0 = record10 .getField("intField").schema();
+        this.intField0 = record10 .getField("intField").schema();
+        this.subField1 = record10 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        subRecord.put(0, null);
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                subRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex1));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = subRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
new file mode 100644
index 000000000..66d402262
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
@@ -0,0 +1,175 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema record20;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.record20 = readerSchema.getField("record2").schema();
+        this.intField0 = record20 .getField("intField").schema();
+        this.subField1 = record20 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex0));
+            }
+        }
+        populate_aliasedSubRecord0((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = aliasedSubRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record20)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record20);
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                aliasedSubRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex2));
+            }
+        }
+        populate_aliasedSubRecord1((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord1(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = aliasedSubRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
new file mode 100644
index 000000000..812c4dc4f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArray0;
+    private final Schema recordsArrayArrayElemSchema0;
+    private final Schema subField0;
+    private final Schema recordsMap0;
+    private final Schema recordsArrayUnion0;
+    private final Schema recordsArrayUnionOptionSchema0;
+    private final Schema recordsArrayUnionOptionArrayElemSchema0;
+    private final Schema recordsMapUnion0;
+    private final Schema recordsMapUnionOptionSchema0;
+    private final Schema recordsMapUnionOptionMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArray0 = readerSchema.getField("recordsArray").schema();
+        this.recordsArrayArrayElemSchema0 = recordsArray0 .getElementType();
+        this.subField0 = recordsArrayArrayElemSchema0 .getField("subField").schema();
+        this.recordsMap0 = readerSchema.getField("recordsMap").schema();
+        this.recordsArrayUnion0 = readerSchema.getField("recordsArrayUnion").schema();
+        this.recordsArrayUnionOptionSchema0 = recordsArrayUnion0 .getTypes().get(1);
+        this.recordsArrayUnionOptionArrayElemSchema0 = recordsArrayUnionOptionSchema0 .getElementType();
+        this.recordsMapUnion0 = readerSchema.getField("recordsMapUnion").schema();
+        this.recordsMapUnionOptionSchema0 = recordsMapUnion0 .getTypes().get(1);
+        this.recordsMapUnionOptionMapValueSchema0 = recordsMapUnionOptionSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<IndexedRecord> recordsArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArray1 = ((List) oldArray0);
+            recordsArray1 .clear();
+        } else {
+            recordsArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordsArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(0, recordsArray1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayArrayElemSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> recordsMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap1 = recordsMapReuse0;
+                } else {
+                    recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), 0));
+            } else {
+                recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(1, recordsMap1);
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, null);
+        } else {
+            if (unionIndex1 == 1) {
+                List<IndexedRecord> recordsArrayUnionOption0 = null;
+                long chunkLen2 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray1);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen2), recordsArrayUnionOptionSchema0);
+                }
+                while (chunkLen2 > 0) {
+                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        int unionIndex2 = (decoder.readIndex());
+                        if (unionIndex2 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex2 == 1) {
+                                recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex2));
+                            }
+                        }
+                    }
+                    chunkLen2 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Map<Utf8, IndexedRecord> recordsMapUnionOption0 = null;
+                long chunkLen3 = (decoder.readMapStart());
+                if (chunkLen3 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), ((int) chunkLen3)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex4 = (decoder.readIndex());
+                            if (unionIndex4 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex4 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex4));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.mapNext());
+                    } while (chunkLen3 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
new file mode 100644
index 000000000..478aad767
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
@@ -0,0 +1,378 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArrayMap0;
+    private final Schema recordsArrayMapArrayElemSchema0;
+    private final Schema recordsArrayMapElemMapValueSchema0;
+    private final Schema recordsArrayMapElemValueOptionSchema0;
+    private final Schema subField0;
+    private final Schema recordsMapArray0;
+    private final Schema recordsMapArrayMapValueSchema0;
+    private final Schema recordsMapArrayValueArrayElemSchema0;
+    private final Schema recordsArrayMapUnion0;
+    private final Schema recordsArrayMapUnionOptionArrayElemSchema0;
+    private final Schema recordsArrayMapUnionOptionElemMapValueSchema0;
+    private final Schema recordsMapArrayUnion0;
+    private final Schema recordsMapArrayUnionOptionSchema0;
+    private final Schema recordsMapArrayUnionOptionValueArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArrayMap0 = readerSchema.getField("recordsArrayMap").schema();
+        this.recordsArrayMapArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapElemMapValueSchema0 = recordsArrayMapArrayElemSchema0 .getValueType();
+        this.recordsArrayMapElemValueOptionSchema0 = recordsArrayMapElemMapValueSchema0 .getTypes().get(1);
+        this.subField0 = recordsArrayMapElemValueOptionSchema0 .getField("subField").schema();
+        this.recordsMapArray0 = readerSchema.getField("recordsMapArray").schema();
+        this.recordsMapArrayMapValueSchema0 = recordsMapArray0 .getValueType();
+        this.recordsMapArrayValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+        this.recordsArrayMapUnion0 = readerSchema.getField("recordsArrayMapUnion").schema();
+        this.recordsArrayMapUnionOptionArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapUnionOptionElemMapValueSchema0 = recordsArrayMapUnionOptionArrayElemSchema0 .getValueType();
+        this.recordsMapArrayUnion0 = readerSchema.getField("recordsMapArrayUnion").schema();
+        this.recordsMapArrayUnionOptionSchema0 = recordsMapArrayUnion0 .getTypes().get(1);
+        this.recordsMapArrayUnionOptionValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Map<Utf8, IndexedRecord>> recordsArrayMap1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArrayMap1 = ((List) oldArray0);
+            recordsArrayMap1 .clear();
+        } else {
+            recordsArrayMap1 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen0), recordsArrayMap0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Map<Utf8, IndexedRecord> recordsArrayMapElem0 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex0 = (decoder.readIndex());
+                            if (unionIndex0 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key0, null);
+                            } else {
+                                if (unionIndex0 == 1) {
+                                    recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex0));
+                                }
+                            }
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                recordsArrayMap1 .add(recordsArrayMapElem0);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(0, recordsArrayMap1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayMapElemValueOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayMapElemValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<IndexedRecord>> recordsMapArray1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray1 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    List<IndexedRecord> recordsMapArrayValue0 = null;
+                    long chunkLen3 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen3), recordsMapArrayMapValueSchema0);
+                    }
+                    while (chunkLen3 > 0) {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex2 = (decoder.readIndex());
+                            if (unionIndex2 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex2 == 1) {
+                                    recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex2));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.arrayNext());
+                    }
+                    recordsMapArray1 .put(key1, recordsMapArrayValue0);
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), 0));
+            } else {
+                recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(1, recordsMapArray1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                List<Map<Utf8, IndexedRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray1);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen4), recordsArrayMap0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen5 = (decoder.readMapStart());
+                        if (chunkLen5 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen5)));
+                            } else {
+                                Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                                    Utf8 key2 = (decoder.readString(null));
+                                    int unionIndex4 = (decoder.readIndex());
+                                    if (unionIndex4 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key2, null);
+                                    } else {
+                                        if (unionIndex4 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex4));
+                                        }
+                                    }
+                                }
+                                chunkLen5 = (decoder.mapNext());
+                            } while (chunkLen5 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readMapStart());
+                if (chunkLen6 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), ((int) chunkLen6)));
+                    } else {
+                        Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            List<IndexedRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen7 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen7), recordsMapArrayMapValueSchema0);
+                            }
+                            while (chunkLen7 > 0) {
+                                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex6 = (decoder.readIndex());
+                                    if (unionIndex6 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex6 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex6));
+                                        }
+                                    }
+                                }
+                                chunkLen7 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key3, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen6 = (decoder.mapNext());
+                    } while (chunkLen6 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
new file mode 100644
index 000000000..8a565e4ce
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record0;
+    private final Schema recordOptionSchema0;
+    private final Schema subField0;
+    private final Schema field0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record0 = readerSchema.getField("record").schema();
+        this.recordOptionSchema0 = record0 .getTypes().get(1);
+        this.subField0 = recordOptionSchema0 .getField("subField").schema();
+        this.field0 = readerSchema.getField("field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'record': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder), (customization)));
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(2);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
new file mode 100644
index 000000000..6556606e3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testNotRemoved0;
+    private final Schema testNotRemoved20;
+    private final Schema subRecord0;
+    private final Schema subRecordOptionSchema0;
+    private final Schema testNotRemoved1;
+    private final Schema testNotRemoved21;
+    private final Schema subRecordMap0;
+    private final Schema subRecordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testNotRemoved0 = readerSchema.getField("testNotRemoved").schema();
+        this.testNotRemoved20 = readerSchema.getField("testNotRemoved2").schema();
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordOptionSchema0 = subRecord0 .getTypes().get(1);
+        this.testNotRemoved1 = subRecordOptionSchema0 .getField("testNotRemoved").schema();
+        this.testNotRemoved21 = subRecordOptionSchema0 .getField("testNotRemoved2").schema();
+        this.subRecordMap0 = readerSchema.getField("subRecordMap").schema();
+        this.subRecordArray0 = readerSchema.getField("subRecordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex3));
+            }
+        }
+        Map<Utf8, IndexedRecord> subRecordMap1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
+                if (oldMap0 instanceof Map) {
+                    subRecordMapReuse0 = ((Map) oldMap0);
+                }
+                if (subRecordMapReuse0 != (null)) {
+                    subRecordMapReuse0 .clear();
+                    subRecordMap1 = subRecordMapReuse0;
+                } else {
+                    subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), 0));
+            } else {
+                subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(3, subRecordMap1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordOptionSchema0);
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = subRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex4));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex5 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = subRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<IndexedRecord> subRecordArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(4);
+        if (oldArray0 instanceof List) {
+            subRecordArray1 = ((List) oldArray0);
+            subRecordArray1 .clear();
+        } else {
+            subRecordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen1), subRecordArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object subRecordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    subRecordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(4, subRecordArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
new file mode 100644
index 000000000..60f9495f5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder), (customization)));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubSubRecord0(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subSubRecord0((decoder));
+    }
+
+    private void populate_subSubRecord0(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
new file mode 100644
index 000000000..96cd0ba88
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord10;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord10 = readerSchema.getField("subRecord1").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord10);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubRecord20(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubRecord20(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subRecord20((decoder));
+    }
+
+    private void populate_subRecord20(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder), (customization)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
new file mode 100644
index 000000000..90bfee54d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
new file mode 100644
index 000000000..9f440e183
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
new file mode 100644
index 000000000..ddebb5cb2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException("Found \"long\", expecting [\"null\", \"string\"]");
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
new file mode 100644
index 000000000..7aaf38951
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
new file mode 100644
index 000000000..c423a87ce
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
new file mode 100644
index 000000000..5b68abfae
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
new file mode 100644
index 000000000..84ea4bd96
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
new file mode 100644
index 000000000..c812c8f47
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
new file mode 100644
index 000000000..863e1649d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
new file mode 100644
index 000000000..3dfeda6af
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
new file mode 100644
index 000000000..e9c9861a6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
new file mode 100644
index 000000000..e7d567f59
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
new file mode 100644
index 000000000..79fcec9c9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
new file mode 100644
index 000000000..4fc89a9f1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
new file mode 100644
index 000000000..e135cb8b8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
new file mode 100644
index 000000000..9cc529233
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
new file mode 100644
index 000000000..56cd64372
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
new file mode 100644
index 000000000..ac721baa0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
new file mode 100644
index 000000000..744a1cbd0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
new file mode 100644
index 000000000..7940f0912
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
new file mode 100644
index 000000000..71545dffe
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(2);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
new file mode 100644
index 000000000..ed12a99e4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
new file mode 100644
index 000000000..ca9fc3e80
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(2);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
new file mode 100644
index 000000000..419de46fa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
new file mode 100644
index 000000000..87e03cff5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
new file mode 100644
index 000000000..d57c71585
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
@@ -0,0 +1,130 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
new file mode 100644
index 000000000..797735242
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
@@ -0,0 +1,130 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
new file mode 100644
index 000000000..888e184a2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
@@ -0,0 +1,1071 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
new file mode 100644
index 000000000..7ff9b55c3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericDeserializer_2140000109_2140000109
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema mapValueOptionSchema0;
+    private final Schema field0;
+
+    public Map_of_UNION_GenericDeserializer_2140000109_2140000109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.mapValueOptionSchema0 = mapMapValueSchema0 .getTypes().get(1);
+        this.field0 = mapValueOptionSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapValueOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_UNION_SpecificDeserializer_971650236_971650236.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
new file mode 100644
index 000000000..aea35982a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
@@ -0,0 +1,1081 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_SpecificDeserializer_971650236_971650236
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_UNION_SpecificDeserializer_971650236_971650236(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_record_GenericDeserializer_1223705675_568621313.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_record_GenericDeserializer_1223705675_568621313.java
new file mode 100644
index 000000000..2b41298b2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_record_GenericDeserializer_1223705675_568621313.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1223705675_568621313
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionMapValueSchema0;
+
+    public Map_of_record_GenericDeserializer_1223705675_568621313(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionMapValueSchema0 = readerSchema.getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
+                        if ((reuse) instanceof Map) {
+                            unionOptionReuse0 = ((Map)(reuse));
+                        }
+                        if (unionOptionReuse0 != (null)) {
+                            unionOptionReuse0 .clear();
+                            unionOption0 = unionOptionReuse0;
+                        } else {
+                            unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            unionOption0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+                    } else {
+                        unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_record_GenericDeserializer_1677529043_1677529043.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_record_GenericDeserializer_1677529043_1677529043.java
new file mode 100644
index 000000000..3644afef8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/Map_of_record_GenericDeserializer_1677529043_1677529043.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1677529043_1677529043
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema field0;
+
+    public Map_of_record_GenericDeserializer_1677529043_1677529043(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.field0 = mapMapValueSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
new file mode 100644
index 000000000..f2751d780
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField>
+{
+
+    private final Schema readerSchema;
+
+    public RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRecordWithLargeUnionField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField RecordWithLargeUnionField;
+        if ((reuse)!= null) {
+            RecordWithLargeUnionField = ((com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField)(reuse));
+        } else {
+            RecordWithLargeUnionField = new com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Utf8 charSequence0;
+            Object oldString0 = RecordWithLargeUnionField.get(0);
+            if (oldString0 instanceof Utf8) {
+                charSequence0 = (decoder).readString(((Utf8) oldString0));
+            } else {
+                charSequence0 = (decoder).readString(null);
+            }
+            RecordWithLargeUnionField.put(0, charSequence0);
+        } else {
+            if (unionIndex0 == 1) {
+                RecordWithLargeUnionField.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException(new StringBuilder().append("Found").append(" \"byt").append("es\", ").append("expec").append("ting ").append("[\"str").append("ing\",").append(" \"int").append("\"]").toString());
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+                }
+            }
+        }
+        return RecordWithLargeUnionField;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
new file mode 100644
index 000000000..d57959c38
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        return RemovedTypesTestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
new file mode 100644
index 000000000..b13730dca
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
@@ -0,0 +1,406 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord3((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord4((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord5((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord6((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord7((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord8((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord9((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord10((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord11((RemovedTypesTestRecord), (customization), (decoder));
+        return RemovedTypesTestRecord;
+    }
+
+    private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipBytes();
+        long chunkLen0 = (decoder.readArrayStart());
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object removedBytesArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipBytes();
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.skipBytes();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedBytesUnion': "+ unionIndex0));
+            }
+        }
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    decoder.skipBytes();
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen2 = (decoder.readArrayStart());
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object removedBytesUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex1 == 1) {
+                        decoder.skipBytes();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedBytesUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex2 = (decoder.readIndex());
+                    if (unionIndex2 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex2 == 1) {
+                            decoder.skipBytes();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedBytesUnionMapValue': "+ unionIndex2));
+                        }
+                    }
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipFixed(1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex3 == 1) {
+                decoder.skipFixed(1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedFixedUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen4 = (decoder.readArrayStart());
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object removedFixedArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipFixed(1);
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    decoder.skipFixed(1);
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen6 = (decoder.readArrayStart());
+        while (chunkLen6 > 0) {
+            for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                Object removedFixedUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex4 = (decoder.readIndex());
+                if (unionIndex4 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex4 == 1) {
+                        decoder.skipFixed(1);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedFixedUnionArrayElem': "+ unionIndex4));
+                    }
+                }
+            }
+            chunkLen6 = (decoder.arrayNext());
+        }
+        long chunkLen7 = (decoder.readMapStart());
+        if (chunkLen7 > 0) {
+            do {
+                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    int unionIndex5 = (decoder.readIndex());
+                    if (unionIndex5 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex5 == 1) {
+                            decoder.skipFixed(1);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedFixedUnionMapValue': "+ unionIndex5));
+                        }
+                    }
+                }
+                chunkLen7 = (decoder.mapNext());
+            } while (chunkLen7 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.readEnum();
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.readEnum();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedEnumUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen8 = (decoder.readArrayStart());
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                decoder.readEnum();
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        long chunkLen9 = (decoder.readMapStart());
+        if (chunkLen9 > 0) {
+            do {
+                for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    decoder.readEnum();
+                }
+                chunkLen9 = (decoder.mapNext());
+            } while (chunkLen9 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen10 = (decoder.readArrayStart());
+        while (chunkLen10 > 0) {
+            for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                Object removedEnumUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex7 = (decoder.readIndex());
+                if (unionIndex7 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex7 == 1) {
+                        decoder.readEnum();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedEnumUnionArrayElem': "+ unionIndex7));
+                    }
+                }
+            }
+            chunkLen10 = (decoder.arrayNext());
+        }
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key5 = (decoder.readString(null));
+                    int unionIndex8 = (decoder.readIndex());
+                    if (unionIndex8 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex8 == 1) {
+                            decoder.readEnum();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedEnumUnionMapValue': "+ unionIndex8));
+                        }
+                    }
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializeRemovedSubRecord0(null, (decoder), (customization));
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex9 == 1) {
+                deserializeRemovedSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedSubRecordUnion': "+ unionIndex9));
+            }
+        }
+    }
+
+    public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen12 = (decoder.readArrayStart());
+        while (chunkLen12 > 0) {
+            for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                Object removedSubRecordArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder), (customization));
+            }
+            chunkLen12 = (decoder.arrayNext());
+        }
+        long chunkLen13 = (decoder.readArrayStart());
+        while (chunkLen13 > 0) {
+            for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                Object removedSubRecordUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex10 == 1) {
+                        deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder), (customization));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen13 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen14 = (decoder.readMapStart());
+        if (chunkLen14 > 0) {
+            do {
+                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                    Utf8 key6 = (decoder.readString(null));
+                    deserializeRemovedSubRecord0(null, (decoder), (customization));
+                }
+                chunkLen14 = (decoder.mapNext());
+            } while (chunkLen14 > 0);
+        }
+        long chunkLen15 = (decoder.readMapStart());
+        if (chunkLen15 > 0) {
+            do {
+                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                    Utf8 key7 = (decoder.readString(null));
+                    int unionIndex11 = (decoder.readIndex());
+                    if (unionIndex11 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex11 == 1) {
+                            deserializeRemovedSubRecord0(null, (decoder), (customization));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionMapValue': "+ unionIndex11));
+                        }
+                    }
+                }
+                chunkLen15 = (decoder.mapNext());
+            } while (chunkLen15 > 0);
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
new file mode 100644
index 000000000..38cd2949b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
@@ -0,0 +1,172 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest1_SpecificDeserializer_1718878379_595582209
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest1_SpecificDeserializer_1718878379_595582209(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSplitRecordTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1;
+        if ((reuse)!= null) {
+            SplitRecordTest1 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1)(reuse));
+        } else {
+            SplitRecordTest1 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1();
+        }
+        SplitRecordTest1 .put(0, deserializeFullRecord0(SplitRecordTest1 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest10((SplitRecordTest1), (customization), (decoder));
+        return SplitRecordTest1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FullRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        FullRecord.put(1, null);
+        return FullRecord;
+    }
+
+    private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest1 .put(1, deserializeFullRecord1(SplitRecordTest1 .get(1), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest1 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            record30 .clear();
+        } else {
+            record30 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord2(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest1 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+        FullRecord.put(0, null);
+        return FullRecord;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord2(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FullRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_FullRecord0((FullRecord), (customization), (decoder));
+        return FullRecord;
+    }
+
+    private void populate_FullRecord0(com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
new file mode 100644
index 000000000..7b59f53eb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
@@ -0,0 +1,204 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FullRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringRecord;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest2_SpecificDeserializer_595582209_1718878379
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest2_SpecificDeserializer_595582209_1718878379(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest20((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSplitRecordTest20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2;
+        if ((reuse)!= null) {
+            SplitRecordTest2 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2)(reuse));
+        } else {
+            SplitRecordTest2 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2();
+        }
+        SplitRecordTest2 .put(0, deserializeStringRecord0(SplitRecordTest2 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest20((SplitRecordTest2), (customization), (decoder));
+        return SplitRecordTest2;
+    }
+
+    public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        StringRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((StringRecord)(reuse));
+        } else {
+            IntRecord = new StringRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = IntRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        populate_IntRecord0((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord0(StringRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest2 .put(1, deserializeIntRecord0(SplitRecordTest2 .get(1), (decoder), (customization)));
+        List<FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest2 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            record30 .clear();
+        } else {
+            record30 = new ArrayList<FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord0(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest2 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((com.linkedin.avro.fastserde.generated.avro.IntRecord)(reuse));
+        } else {
+            IntRecord = new com.linkedin.avro.fastserde.generated.avro.IntRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex2 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_IntRecord1((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex3 == 1) {
+                IntRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+    public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        FullRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((FullRecord)(reuse));
+        } else {
+            IntRecord = new FullRecord();
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = IntRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex4));
+            }
+        }
+        populate_IntRecord2((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord2(FullRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            IntRecord.put(1, null);
+        } else {
+            if (unionIndex5 == 1) {
+                IntRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/StringableRecord_SpecificDeserializer_842267318_842267318.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/StringableRecord_SpecificDeserializer_842267318_842267318.java
new file mode 100644
index 000000000..7967577ed
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/StringableRecord_SpecificDeserializer_842267318_842267318.java
@@ -0,0 +1,260 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroRuntimeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificDeserializer_842267318_842267318
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.StringableRecord>
+{
+
+    private final Schema readerSchema;
+
+    public StringableRecord_SpecificDeserializer_842267318_842267318(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        try {
+            return deserializeStringableRecord0((reuse), (decoder), (customization));
+        } catch (NumberFormatException e) {
+            throw new AvroRuntimeException(e);
+        } catch (MalformedURLException e) {
+            throw new AvroRuntimeException(e);
+        } catch (URISyntaxException e) {
+            throw new AvroRuntimeException(e);
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord;
+        if ((reuse)!= null) {
+            StringableRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableRecord)(reuse));
+        } else {
+            StringableRecord = new com.linkedin.avro.fastserde.generated.avro.StringableRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = StringableRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        StringableRecord.put(0, charSequence0);
+        populate_StringableRecord0((StringableRecord), (customization), (decoder));
+        populate_StringableRecord1((StringableRecord), (customization), (decoder));
+        populate_StringableRecord2((StringableRecord), (customization), (decoder));
+        populate_StringableRecord3((StringableRecord), (customization), (decoder));
+        populate_StringableRecord4((StringableRecord), (customization), (decoder));
+        return StringableRecord;
+    }
+
+    private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, URISyntaxException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = StringableRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        StringableRecord.put(1, charSequence1);
+        Utf8 charSequence2;
+        Object oldString2 = StringableRecord.get(2);
+        if (oldString2 instanceof Utf8) {
+            charSequence2 = (decoder).readString(((Utf8) oldString2));
+        } else {
+            charSequence2 = (decoder).readString(null);
+        }
+        StringableRecord.put(2, charSequence2);
+    }
+
+    private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        Utf8 charSequence3;
+        Object oldString3 = StringableRecord.get(3);
+        if (oldString3 instanceof Utf8) {
+            charSequence3 = (decoder).readString(((Utf8) oldString3));
+        } else {
+            charSequence3 = (decoder).readString(null);
+        }
+        StringableRecord.put(3, charSequence3);
+        Utf8 charSequence4;
+        Object oldString4 = StringableRecord.get(4);
+        if (oldString4 instanceof Utf8) {
+            charSequence4 = (decoder).readString(((Utf8) oldString4));
+        } else {
+            charSequence4 = (decoder).readString(null);
+        }
+        StringableRecord.put(4, charSequence4);
+    }
+
+    private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        List<Utf8> urlArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = StringableRecord.get(5);
+        if (oldArray0 instanceof List) {
+            urlArray0 = ((List) oldArray0);
+            urlArray0 .clear();
+        } else {
+            urlArray0 = new ArrayList<Utf8>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object urlArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    urlArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence5;
+                if (urlArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) urlArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                urlArray0 .add(charSequence5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        StringableRecord.put(5, urlArray0);
+        Map<Utf8, Utf8> urlMap0 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> urlMapReuse0 = null;
+                Object oldMap0 = StringableRecord.get(6);
+                if (oldMap0 instanceof Map) {
+                    urlMapReuse0 = ((Map) oldMap0);
+                }
+                if (urlMapReuse0 != (null)) {
+                    urlMapReuse0 .clear();
+                    urlMap0 = urlMapReuse0;
+                } else {
+                    urlMap0 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = new Utf8((decoder.readString()));
+                    Utf8 charSequence6 = (decoder).readString(null);
+                    urlMap0 .put(key0, charSequence6);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), 0));
+            } else {
+                urlMap0 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        StringableRecord.put(6, urlMap0);
+    }
+
+    private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        StringableRecord.put(7, deserializeStringableSubRecord0(StringableRecord.get(7), (decoder), (customization)));
+        StringableRecord.put(8, deserializeAnotherSubRecord0(StringableRecord.get(8), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord;
+        if ((reuse)!= null) {
+            StringableSubRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableSubRecord)(reuse));
+        } else {
+            StringableSubRecord = new com.linkedin.avro.fastserde.generated.avro.StringableSubRecord();
+        }
+        Utf8 charSequence7;
+        Object oldString5 = StringableSubRecord.get(0);
+        if (oldString5 instanceof Utf8) {
+            charSequence7 = (decoder).readString(((Utf8) oldString5));
+        } else {
+            charSequence7 = (decoder).readString(null);
+        }
+        StringableSubRecord.put(0, charSequence7);
+        populate_StringableSubRecord0((StringableSubRecord), (customization), (decoder));
+        return StringableSubRecord;
+    }
+
+    private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, URISyntaxException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            StringableSubRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence8;
+                Object oldString6 = StringableSubRecord.get(1);
+                if (oldString6 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                StringableSubRecord.put(1, charSequence8);
+            } else {
+                if (unionIndex0 == 2) {
+                    StringableSubRecord.put(1, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullStringIntUnion': "+ unionIndex0));
+                }
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord AnotherSubRecord;
+        if ((reuse)!= null) {
+            AnotherSubRecord = ((com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord)(reuse));
+        } else {
+            AnotherSubRecord = new com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord();
+        }
+        AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder), (customization)));
+        return AnotherSubRecord;
+    }
+
+    private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            StringableRecord.put(9, null);
+        } else {
+            if (unionIndex1 == 1) {
+                String charSequence9 = (decoder).readString();
+                StringableRecord.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'stringUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
new file mode 100644
index 000000000..146215aeb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
@@ -0,0 +1,46 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class TestArrayOfFloats_GenericDeserializer_1408566797_1408566797
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema array_of_float0;
+
+    public TestArrayOfFloats_GenericDeserializer_1408566797_1408566797(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.array_of_float0 = readerSchema.getField("array_of_float").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestArrayOfFloats0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestArrayOfFloats;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestArrayOfFloats = ((IndexedRecord)(reuse));
+        } else {
+            TestArrayOfFloats = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveFloatList array_of_float1 = null;
+        array_of_float1 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestArrayOfFloats.get(0), (decoder)));
+        TestArrayOfFloats.put(0, array_of_float1);
+        return TestArrayOfFloats;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_GenericDeserializer_473555078_473555078.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_GenericDeserializer_473555078_473555078.java
new file mode 100644
index 000000000..e48c9eb5b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_GenericDeserializer_473555078_473555078.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_GenericDeserializer_473555078_473555078
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema map_field0;
+
+    public TestRecord_GenericDeserializer_473555078_473555078(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.map_field0 = readerSchema.getField("map_field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestRecord = ((IndexedRecord)(reuse));
+        } else {
+            TestRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Utf8> map_field1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Utf8> map_fieldReuse0 = null;
+                Object oldMap0 = TestRecord.get(0);
+                if (oldMap0 instanceof Map) {
+                    map_fieldReuse0 = ((Map) oldMap0);
+                }
+                if (map_fieldReuse0 != (null)) {
+                    map_fieldReuse0 .clear();
+                    map_field1 = map_fieldReuse0;
+                } else {
+                    map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence0 = (decoder).readString(null);
+                    map_field1 .put(key0, charSequence0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), 0));
+            } else {
+                map_field1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        TestRecord.put(0, map_field1);
+        return TestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_1898726132_553331077.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_1898726132_553331077.java
new file mode 100644
index 000000000..4650f7ece
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_1898726132_553331077.java
@@ -0,0 +1,1039 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1898726132_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1898726132_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_1991094399_553331077.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_1991094399_553331077.java
new file mode 100644
index 000000000..924909ded
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_1991094399_553331077.java
@@ -0,0 +1,1043 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1991094399_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1991094399_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(6);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        tempEnumMapping0 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(6);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        tempEnumMapping1 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(6);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        tempEnumMapping2 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(6);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        tempEnumMapping3 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_553331077_553331077.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_553331077_553331077.java
new file mode 100644
index 000000000..62a970113
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/TestRecord_SpecificDeserializer_553331077_553331077.java
@@ -0,0 +1,1040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_553331077_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public TestRecord_SpecificDeserializer_553331077_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen16 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen16));
+        }
+        while (chunkLen16 > 0) {
+            for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen16 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_1971822364_1672473580.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_1971822364_1672473580.java
new file mode 100644
index 000000000..ddc624892
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_1971822364_1672473580.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_1971822364_1672473580
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordRecordSchema0;
+
+    public UNION_GenericDeserializer_1971822364_1672473580(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordRecordSchema0 = readerSchema.getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordRecordSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(recordRecordSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_2018567528_1606337179.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_2018567528_1606337179.java
new file mode 100644
index 000000000..ad0f8e449
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_2018567528_1606337179.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_2018567528_1606337179
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArraySchema0;
+    private final Schema arrayArrayElemSchema0;
+
+    public UNION_GenericDeserializer_2018567528_1606337179(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArraySchema0 = readerSchema.getTypes().get(1);
+        this.arrayArrayElemSchema0 = arrayArraySchema0 .getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), arrayArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_568621313_1223705675.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_568621313_1223705675.java
new file mode 100644
index 000000000..43600cff0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UNION_GenericDeserializer_568621313_1223705675.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class UNION_GenericDeserializer_568621313_1223705675
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapSchema0;
+    private final Schema mapMapValueSchema0;
+
+    public UNION_GenericDeserializer_568621313_1223705675(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapSchema0 = readerSchema.getTypes().get(1);
+        this.mapMapValueSchema0 = mapMapSchema0 .getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
new file mode 100644
index 000000000..a48705947
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV1;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV2;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField>
+{
+
+    private final Schema readerSchema;
+
+    public UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeUnionOfRecordsWithSameNameEnumField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField UnionOfRecordsWithSameNameEnumField;
+        if ((reuse)!= null) {
+            UnionOfRecordsWithSameNameEnumField = ((com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField)(reuse));
+        } else {
+            UnionOfRecordsWithSameNameEnumField = new com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+        return UnionOfRecordsWithSameNameEnumField;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV1 MyRecordV1;
+        if ((reuse)!= null) {
+            MyRecordV1 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV1)(reuse));
+        } else {
+            MyRecordV1 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV1();
+        }
+        MyRecordV1 .put(0, Enums.getConstant(MyEnumV1 .class, (decoder.readEnum())));
+        return MyRecordV1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV2 MyRecordV2;
+        if ((reuse)!= null) {
+            MyRecordV2 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV2)(reuse));
+        } else {
+            MyRecordV2 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV2();
+        }
+        MyRecordV2 .put(0, Enums.getConstant(MyEnumV2 .class, (decoder.readEnum())));
+        return MyRecordV2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/recordName_GenericDeserializer_1743054079_1743054079.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/recordName_GenericDeserializer_1743054079_1743054079.java
new file mode 100644
index 000000000..c98c109d4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/recordName_GenericDeserializer_1743054079_1743054079.java
@@ -0,0 +1,67 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class recordName_GenericDeserializer_1743054079_1743054079
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionField0;
+
+    public recordName_GenericDeserializer_1743054079_1743054079(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionField0 = readerSchema.getField("unionField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecordName0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord recordName;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            recordName = ((IndexedRecord)(reuse));
+        } else {
+            recordName = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = recordName.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        recordName.put(0, charSequence0);
+        populate_recordName0((recordName), (customization), (decoder));
+        return recordName;
+    }
+
+    private void populate_recordName0(IndexedRecord recordName, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            recordName.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                recordName.put(1, deserializerecordName0(recordName.get(1), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1025741720_1557256887.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1025741720_1557256887.java
new file mode 100644
index 000000000..a491f24a9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1025741720_1557256887.java
@@ -0,0 +1,96 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1025741720_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1025741720_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex1 = (decoder.readIndex());
+                            if (unionIndex1 == 0) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                if (unionIndex1 == 1) {
+                                    someIntsOption0 .put(key0, (decoder.readInt()));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'someIntsOptionValue': "+ unionIndex1));
+                                }
+                            }
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1126840752_2099305627.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1126840752_2099305627.java
new file mode 100644
index 000000000..28ea8b4b3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1126840752_2099305627.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1126840752_2099305627
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1126840752_2099305627(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            if (unionIndex0 == 1) {
+                throw new AvroTypeException("Found \"string\", expecting \"int\"");
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someField': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1191367445_653449771.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1191367445_653449771.java
new file mode 100644
index 000000000..f77f241cd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1191367445_653449771.java
@@ -0,0 +1,69 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1191367445_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1191367445_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        someIntsOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1373882843_1971822364.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1373882843_1971822364.java
new file mode 100644
index 000000000..67eeb8245
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1373882843_1971822364.java
@@ -0,0 +1,45 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1373882843_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1373882843_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            throw new RuntimeException(("Illegal union index for 'someInt': "+ unionIndex0));
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1556659421_711533897.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1556659421_711533897.java
new file mode 100644
index 000000000..da06fa315
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1556659421_711533897.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1556659421_711533897
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public record_GenericDeserializer_1556659421_711533897(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"subRecord\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"subRecord\",\"fields\":[{\"name\":\"someInt1\",\"type\":\"int\",\"doc\":\"\"},{\"name\":\"someInt2\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1557256887_1025741720.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1557256887_1025741720.java
new file mode 100644
index 000000000..23deeece4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1557256887_1025741720.java
@@ -0,0 +1,81 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_1025741720
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+    private final Schema someIntsMapValueSchema0;
+
+    public record_GenericDeserializer_1557256887_1025741720(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+        this.someIntsMapValueSchema0 = someIntsMapSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1557256887_753570467.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1557256887_753570467.java
new file mode 100644
index 000000000..16dc85471
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1557256887_753570467.java
@@ -0,0 +1,79 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_753570467
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+
+    public record_GenericDeserializer_1557256887_753570467(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1672473580_1971822364.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1672473580_1971822364.java
new file mode 100644
index 000000000..71be0018a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1672473580_1971822364.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1672473580_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1672473580_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                return deserializerecord0((reuse), (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1971822364_1373882843.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1971822364_1373882843.java
new file mode 100644
index 000000000..9bbadb740
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_1971822364_1373882843.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1971822364_1373882843
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInt0;
+
+    public record_GenericDeserializer_1971822364_1373882843(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInt0 = readerSchema.getField("someInt").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_653449771_1191367445.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_653449771_1191367445.java
new file mode 100644
index 000000000..dfa41cecb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_653449771_1191367445.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_1191367445
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+
+    public record_GenericDeserializer_653449771_1191367445(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveIntList someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof PrimitiveIntList) {
+            someInts1 = ((PrimitiveIntList) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_653449771_813379571.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_653449771_813379571.java
new file mode 100644
index 000000000..c2197cfbd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_653449771_813379571.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_813379571
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+    private final Schema someIntsArrayElemSchema0;
+
+    public record_GenericDeserializer_653449771_813379571(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+        this.someIntsArrayElemSchema0 = someIntsArraySchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof List) {
+            someInts1 = ((List) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new org.apache.avro.generic.GenericData.Array<Integer>(((int) chunkLen0), someIntsArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .add((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_711533897_1556659421.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_711533897_1556659421.java
new file mode 100644
index 000000000..f316c3e78
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_711533897_1556659421.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_711533897_1556659421
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+    private final Schema subRecordRecordSchema0;
+
+    public record_GenericDeserializer_711533897_1556659421(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordRecordSchema0 = subRecord0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordRecordSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordRecordSchema0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_753570467_1557256887.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_753570467_1557256887.java
new file mode 100644
index 000000000..881a89956
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_753570467_1557256887.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_753570467_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_753570467_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            someIntsOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_813379571_653449771.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_813379571_653449771.java
new file mode 100644
index 000000000..6f4a58736
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/record_GenericDeserializer_813379571_653449771.java
@@ -0,0 +1,83 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_813379571_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_813379571_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object someIntsOptionArrayElementReuseVar0 = null;
+                        if (oldArray0 instanceof GenericArray) {
+                            someIntsOptionArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                        }
+                        int unionIndex1 = (decoder.readIndex());
+                        if (unionIndex1 == 0) {
+                            someIntsOption0 .addPrimitive((decoder.readInt()));
+                        } else {
+                            if (unionIndex1 == 1) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'someIntsOptionElem': "+ unionIndex1));
+                            }
+                        }
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/testRecord_GenericDeserializer_1146484089_1256982207.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/testRecord_GenericDeserializer_1146484089_1256982207.java
new file mode 100644
index 000000000..67a61c7fa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_6/testRecord_GenericDeserializer_1146484089_1256982207.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class testRecord_GenericDeserializer_1146484089_1256982207
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+
+    public testRecord_GenericDeserializer_1146484089_1256982207(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.testEnum: No match for C"));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializetestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord testRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            testRecord = ((IndexedRecord)(reuse));
+        } else {
+            testRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        testRecord.put(0, enumValue0);
+        return testRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_BOOLEAN_GenericSerializer_869749973.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_BOOLEAN_GenericSerializer_869749973.java
new file mode 100644
index 000000000..5ac7ed6ef
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_BOOLEAN_GenericSerializer_869749973.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_BOOLEAN_GenericSerializer_869749973
+    implements FastSerializer<List<Boolean>>
+{
+
+
+    public void serialize(List<Boolean> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveBooleanList) {
+                PrimitiveBooleanList primitiveList0 = ((PrimitiveBooleanList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_DOUBLE_GenericSerializer_18760307.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_DOUBLE_GenericSerializer_18760307.java
new file mode 100644
index 000000000..3f0a5c6ec
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_DOUBLE_GenericSerializer_18760307.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_DOUBLE_GenericSerializer_18760307
+    implements FastSerializer<List<Double>>
+{
+
+
+    public void serialize(List<Double> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveDoubleList) {
+                PrimitiveDoubleList primitiveList0 = ((PrimitiveDoubleList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_FLOAT_GenericSerializer_1012670397.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_FLOAT_GenericSerializer_1012670397.java
new file mode 100644
index 000000000..6b706fbac
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_FLOAT_GenericSerializer_1012670397.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_FLOAT_GenericSerializer_1012670397
+    implements FastSerializer<List<Float>>
+{
+
+
+    public void serialize(List<Float> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_INT_GenericSerializer_1012089072.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_INT_GenericSerializer_1012089072.java
new file mode 100644
index 000000000..603c963bf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_INT_GenericSerializer_1012089072.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_INT_GenericSerializer_1012089072
+    implements FastSerializer<List<Integer>>
+{
+
+
+    public void serialize(List<Integer> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_LONG_GenericSerializer_325099267.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_LONG_GenericSerializer_325099267.java
new file mode 100644
index 000000000..eb8541504
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_LONG_GenericSerializer_325099267.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_LONG_GenericSerializer_325099267
+    implements FastSerializer<List<Long>>
+{
+
+
+    public void serialize(List<Long> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveLongList) {
+                PrimitiveLongList primitiveList0 = ((PrimitiveLongList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_UNION_GenericSerializer_777827233.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_UNION_GenericSerializer_777827233.java
new file mode 100644
index 000000000..35f3531a8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_UNION_GenericSerializer_777827233.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericSerializer_777827233
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord union0 = null;
+                union0 = ((List<IndexedRecord> ) data).get(counter0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_record_GenericSerializer_477614132.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_record_GenericSerializer_477614132.java
new file mode 100644
index 000000000..16cc87832
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Array_of_record_GenericSerializer_477614132.java
@@ -0,0 +1,53 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericSerializer_477614132
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord record0 = null;
+                record0 = ((List<IndexedRecord> ) data).get(counter0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
new file mode 100644
index 000000000..129e53e71
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
@@ -0,0 +1,4527 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        (encoder).writeInt(((Integer) data.get(2)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(3)));
+        (encoder).writeInt(((Integer) data.get(4)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(5)));
+        (encoder).writeInt(((Integer) data.get(6)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(7)));
+        (encoder).writeInt(((Integer) data.get(8)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(9)));
+        (encoder).writeInt(((Integer) data.get(10)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(11)));
+        (encoder).writeInt(((Integer) data.get(12)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(13)));
+        (encoder).writeInt(((Integer) data.get(14)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(15)));
+        (encoder).writeInt(((Integer) data.get(16)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(17)));
+        (encoder).writeInt(((Integer) data.get(18)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(19)));
+        (encoder).writeInt(((Integer) data.get(20)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(21)));
+        (encoder).writeInt(((Integer) data.get(22)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(23)));
+        (encoder).writeInt(((Integer) data.get(24)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(25)));
+        (encoder).writeInt(((Integer) data.get(26)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(27)));
+        (encoder).writeInt(((Integer) data.get(28)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(29)));
+        (encoder).writeInt(((Integer) data.get(30)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(31)));
+        (encoder).writeInt(((Integer) data.get(32)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(33)));
+        (encoder).writeInt(((Integer) data.get(34)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(35)));
+        (encoder).writeInt(((Integer) data.get(36)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(37)));
+        (encoder).writeInt(((Integer) data.get(38)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(39)));
+        (encoder).writeInt(((Integer) data.get(40)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(41)));
+        (encoder).writeInt(((Integer) data.get(42)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(43)));
+        (encoder).writeInt(((Integer) data.get(44)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(45)));
+        (encoder).writeInt(((Integer) data.get(46)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(47)));
+        (encoder).writeInt(((Integer) data.get(48)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(49)));
+        (encoder).writeInt(((Integer) data.get(50)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(51)));
+        (encoder).writeInt(((Integer) data.get(52)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(53)));
+        (encoder).writeInt(((Integer) data.get(54)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(55)));
+        (encoder).writeInt(((Integer) data.get(56)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(57)));
+        (encoder).writeInt(((Integer) data.get(58)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(59)));
+        (encoder).writeInt(((Integer) data.get(60)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(61)));
+        (encoder).writeInt(((Integer) data.get(62)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(63)));
+        (encoder).writeInt(((Integer) data.get(64)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(65)));
+        (encoder).writeInt(((Integer) data.get(66)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(67)));
+        (encoder).writeInt(((Integer) data.get(68)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(69)));
+        (encoder).writeInt(((Integer) data.get(70)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(71)));
+        (encoder).writeInt(((Integer) data.get(72)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(73)));
+        (encoder).writeInt(((Integer) data.get(74)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(75)));
+        (encoder).writeInt(((Integer) data.get(76)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(77)));
+        (encoder).writeInt(((Integer) data.get(78)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(79)));
+        (encoder).writeInt(((Integer) data.get(80)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(81)));
+        (encoder).writeInt(((Integer) data.get(82)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(83)));
+        (encoder).writeInt(((Integer) data.get(84)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(85)));
+        (encoder).writeInt(((Integer) data.get(86)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(87)));
+        (encoder).writeInt(((Integer) data.get(88)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(89)));
+        (encoder).writeInt(((Integer) data.get(90)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(91)));
+        (encoder).writeInt(((Integer) data.get(92)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(93)));
+        (encoder).writeInt(((Integer) data.get(94)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(95)));
+        (encoder).writeInt(((Integer) data.get(96)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(97)));
+        (encoder).writeInt(((Integer) data.get(98)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(99)));
+        (encoder).writeInt(((Integer) data.get(100)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(101)));
+        (encoder).writeInt(((Integer) data.get(102)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(103)));
+        (encoder).writeInt(((Integer) data.get(104)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(105)));
+        (encoder).writeInt(((Integer) data.get(106)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(107)));
+        (encoder).writeInt(((Integer) data.get(108)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(109)));
+        (encoder).writeInt(((Integer) data.get(110)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(111)));
+        (encoder).writeInt(((Integer) data.get(112)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(113)));
+        (encoder).writeInt(((Integer) data.get(114)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(115)));
+        (encoder).writeInt(((Integer) data.get(116)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(117)));
+        (encoder).writeInt(((Integer) data.get(118)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(119)));
+        (encoder).writeInt(((Integer) data.get(120)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(121)));
+        (encoder).writeInt(((Integer) data.get(122)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(123)));
+        (encoder).writeInt(((Integer) data.get(124)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(125)));
+        (encoder).writeInt(((Integer) data.get(126)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(127)));
+        (encoder).writeInt(((Integer) data.get(128)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(129)));
+        (encoder).writeInt(((Integer) data.get(130)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(131)));
+        (encoder).writeInt(((Integer) data.get(132)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(133)));
+        (encoder).writeInt(((Integer) data.get(134)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(135)));
+        (encoder).writeInt(((Integer) data.get(136)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(137)));
+        (encoder).writeInt(((Integer) data.get(138)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(139)));
+        (encoder).writeInt(((Integer) data.get(140)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(141)));
+        (encoder).writeInt(((Integer) data.get(142)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(143)));
+        (encoder).writeInt(((Integer) data.get(144)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(145)));
+        (encoder).writeInt(((Integer) data.get(146)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(147)));
+        (encoder).writeInt(((Integer) data.get(148)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(149)));
+        (encoder).writeInt(((Integer) data.get(150)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(151)));
+        (encoder).writeInt(((Integer) data.get(152)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(153)));
+        (encoder).writeInt(((Integer) data.get(154)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(155)));
+        (encoder).writeInt(((Integer) data.get(156)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(157)));
+        (encoder).writeInt(((Integer) data.get(158)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(159)));
+        (encoder).writeInt(((Integer) data.get(160)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(161)));
+        (encoder).writeInt(((Integer) data.get(162)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(163)));
+        (encoder).writeInt(((Integer) data.get(164)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(165)));
+        (encoder).writeInt(((Integer) data.get(166)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(167)));
+        (encoder).writeInt(((Integer) data.get(168)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(169)));
+        (encoder).writeInt(((Integer) data.get(170)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(171)));
+        (encoder).writeInt(((Integer) data.get(172)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(173)));
+        (encoder).writeInt(((Integer) data.get(174)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(175)));
+        (encoder).writeInt(((Integer) data.get(176)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(177)));
+        (encoder).writeInt(((Integer) data.get(178)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(179)));
+        (encoder).writeInt(((Integer) data.get(180)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(181)));
+        (encoder).writeInt(((Integer) data.get(182)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(183)));
+        (encoder).writeInt(((Integer) data.get(184)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(185)));
+        (encoder).writeInt(((Integer) data.get(186)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(187)));
+        (encoder).writeInt(((Integer) data.get(188)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(189)));
+        (encoder).writeInt(((Integer) data.get(190)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(191)));
+        (encoder).writeInt(((Integer) data.get(192)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(193)));
+        (encoder).writeInt(((Integer) data.get(194)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(195)));
+        (encoder).writeInt(((Integer) data.get(196)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(197)));
+        (encoder).writeInt(((Integer) data.get(198)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(199)));
+        (encoder).writeInt(((Integer) data.get(200)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(201)));
+        (encoder).writeInt(((Integer) data.get(202)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(203)));
+        (encoder).writeInt(((Integer) data.get(204)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(205)));
+        (encoder).writeInt(((Integer) data.get(206)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(207)));
+        (encoder).writeInt(((Integer) data.get(208)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(209)));
+        (encoder).writeInt(((Integer) data.get(210)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(211)));
+        (encoder).writeInt(((Integer) data.get(212)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(213)));
+        (encoder).writeInt(((Integer) data.get(214)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(215)));
+        (encoder).writeInt(((Integer) data.get(216)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(217)));
+        (encoder).writeInt(((Integer) data.get(218)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(219)));
+        (encoder).writeInt(((Integer) data.get(220)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(221)));
+        (encoder).writeInt(((Integer) data.get(222)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(223)));
+        (encoder).writeInt(((Integer) data.get(224)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(225)));
+        (encoder).writeInt(((Integer) data.get(226)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(227)));
+        (encoder).writeInt(((Integer) data.get(228)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(229)));
+        (encoder).writeInt(((Integer) data.get(230)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(231)));
+        (encoder).writeInt(((Integer) data.get(232)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(233)));
+        (encoder).writeInt(((Integer) data.get(234)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(235)));
+        (encoder).writeInt(((Integer) data.get(236)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(237)));
+        (encoder).writeInt(((Integer) data.get(238)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(239)));
+        (encoder).writeInt(((Integer) data.get(240)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(241)));
+        (encoder).writeInt(((Integer) data.get(242)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(243)));
+        (encoder).writeInt(((Integer) data.get(244)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(245)));
+        (encoder).writeInt(((Integer) data.get(246)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(247)));
+        (encoder).writeInt(((Integer) data.get(248)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(249)));
+        (encoder).writeInt(((Integer) data.get(250)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(251)));
+        (encoder).writeInt(((Integer) data.get(252)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(253)));
+        (encoder).writeInt(((Integer) data.get(254)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(255)));
+        (encoder).writeInt(((Integer) data.get(256)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(257)));
+        (encoder).writeInt(((Integer) data.get(258)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(259)));
+        (encoder).writeInt(((Integer) data.get(260)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(261)));
+        (encoder).writeInt(((Integer) data.get(262)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(263)));
+        (encoder).writeInt(((Integer) data.get(264)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(265)));
+        (encoder).writeInt(((Integer) data.get(266)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(267)));
+        (encoder).writeInt(((Integer) data.get(268)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(269)));
+        (encoder).writeInt(((Integer) data.get(270)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(271)));
+        (encoder).writeInt(((Integer) data.get(272)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(273)));
+        (encoder).writeInt(((Integer) data.get(274)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(275)));
+        (encoder).writeInt(((Integer) data.get(276)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(277)));
+        (encoder).writeInt(((Integer) data.get(278)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(279)));
+        (encoder).writeInt(((Integer) data.get(280)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(281)));
+        (encoder).writeInt(((Integer) data.get(282)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(283)));
+        (encoder).writeInt(((Integer) data.get(284)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(285)));
+        (encoder).writeInt(((Integer) data.get(286)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(287)));
+        (encoder).writeInt(((Integer) data.get(288)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(289)));
+        (encoder).writeInt(((Integer) data.get(290)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(291)));
+        (encoder).writeInt(((Integer) data.get(292)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(293)));
+        (encoder).writeInt(((Integer) data.get(294)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(295)));
+        (encoder).writeInt(((Integer) data.get(296)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(297)));
+        (encoder).writeInt(((Integer) data.get(298)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(299)));
+        (encoder).writeInt(((Integer) data.get(300)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(301)));
+        (encoder).writeInt(((Integer) data.get(302)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(303)));
+        (encoder).writeInt(((Integer) data.get(304)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(305)));
+        (encoder).writeInt(((Integer) data.get(306)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(307)));
+        (encoder).writeInt(((Integer) data.get(308)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(309)));
+        (encoder).writeInt(((Integer) data.get(310)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(311)));
+        (encoder).writeInt(((Integer) data.get(312)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(313)));
+        (encoder).writeInt(((Integer) data.get(314)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(315)));
+        (encoder).writeInt(((Integer) data.get(316)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(317)));
+        (encoder).writeInt(((Integer) data.get(318)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(319)));
+        (encoder).writeInt(((Integer) data.get(320)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(321)));
+        (encoder).writeInt(((Integer) data.get(322)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(323)));
+        (encoder).writeInt(((Integer) data.get(324)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(325)));
+        (encoder).writeInt(((Integer) data.get(326)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(327)));
+        (encoder).writeInt(((Integer) data.get(328)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(329)));
+        (encoder).writeInt(((Integer) data.get(330)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(331)));
+        (encoder).writeInt(((Integer) data.get(332)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(333)));
+        (encoder).writeInt(((Integer) data.get(334)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(335)));
+        (encoder).writeInt(((Integer) data.get(336)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(337)));
+        (encoder).writeInt(((Integer) data.get(338)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(339)));
+        (encoder).writeInt(((Integer) data.get(340)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(341)));
+        (encoder).writeInt(((Integer) data.get(342)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(343)));
+        (encoder).writeInt(((Integer) data.get(344)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(345)));
+        (encoder).writeInt(((Integer) data.get(346)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(347)));
+        (encoder).writeInt(((Integer) data.get(348)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(349)));
+        (encoder).writeInt(((Integer) data.get(350)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(351)));
+        (encoder).writeInt(((Integer) data.get(352)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(353)));
+        (encoder).writeInt(((Integer) data.get(354)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(355)));
+        (encoder).writeInt(((Integer) data.get(356)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(357)));
+        (encoder).writeInt(((Integer) data.get(358)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(359)));
+        (encoder).writeInt(((Integer) data.get(360)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(361)));
+        (encoder).writeInt(((Integer) data.get(362)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(363)));
+        (encoder).writeInt(((Integer) data.get(364)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(365)));
+        (encoder).writeInt(((Integer) data.get(366)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(367)));
+        (encoder).writeInt(((Integer) data.get(368)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(369)));
+        (encoder).writeInt(((Integer) data.get(370)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(371)));
+        (encoder).writeInt(((Integer) data.get(372)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(373)));
+        (encoder).writeInt(((Integer) data.get(374)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(375)));
+        (encoder).writeInt(((Integer) data.get(376)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(377)));
+        (encoder).writeInt(((Integer) data.get(378)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(379)));
+        (encoder).writeInt(((Integer) data.get(380)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(381)));
+        (encoder).writeInt(((Integer) data.get(382)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(383)));
+        (encoder).writeInt(((Integer) data.get(384)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(385)));
+        (encoder).writeInt(((Integer) data.get(386)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(387)));
+        (encoder).writeInt(((Integer) data.get(388)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(389)));
+        (encoder).writeInt(((Integer) data.get(390)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(391)));
+        (encoder).writeInt(((Integer) data.get(392)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(393)));
+        (encoder).writeInt(((Integer) data.get(394)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(395)));
+        (encoder).writeInt(((Integer) data.get(396)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(397)));
+        (encoder).writeInt(((Integer) data.get(398)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(399)));
+        (encoder).writeInt(((Integer) data.get(400)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(401)));
+        (encoder).writeInt(((Integer) data.get(402)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(403)));
+        (encoder).writeInt(((Integer) data.get(404)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(405)));
+        (encoder).writeInt(((Integer) data.get(406)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(407)));
+        (encoder).writeInt(((Integer) data.get(408)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(409)));
+        (encoder).writeInt(((Integer) data.get(410)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(411)));
+        (encoder).writeInt(((Integer) data.get(412)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(413)));
+        (encoder).writeInt(((Integer) data.get(414)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(415)));
+        (encoder).writeInt(((Integer) data.get(416)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(417)));
+        (encoder).writeInt(((Integer) data.get(418)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(419)));
+        (encoder).writeInt(((Integer) data.get(420)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(421)));
+        (encoder).writeInt(((Integer) data.get(422)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(423)));
+        (encoder).writeInt(((Integer) data.get(424)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(425)));
+        (encoder).writeInt(((Integer) data.get(426)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(427)));
+        (encoder).writeInt(((Integer) data.get(428)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(429)));
+        (encoder).writeInt(((Integer) data.get(430)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(431)));
+        (encoder).writeInt(((Integer) data.get(432)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(433)));
+        (encoder).writeInt(((Integer) data.get(434)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(435)));
+        (encoder).writeInt(((Integer) data.get(436)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(437)));
+        (encoder).writeInt(((Integer) data.get(438)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(439)));
+        (encoder).writeInt(((Integer) data.get(440)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(441)));
+        (encoder).writeInt(((Integer) data.get(442)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(443)));
+        (encoder).writeInt(((Integer) data.get(444)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(445)));
+        (encoder).writeInt(((Integer) data.get(446)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(447)));
+        (encoder).writeInt(((Integer) data.get(448)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(449)));
+        (encoder).writeInt(((Integer) data.get(450)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(451)));
+        (encoder).writeInt(((Integer) data.get(452)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(453)));
+        (encoder).writeInt(((Integer) data.get(454)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(455)));
+        (encoder).writeInt(((Integer) data.get(456)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(457)));
+        (encoder).writeInt(((Integer) data.get(458)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(459)));
+        (encoder).writeInt(((Integer) data.get(460)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(461)));
+        (encoder).writeInt(((Integer) data.get(462)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(463)));
+        (encoder).writeInt(((Integer) data.get(464)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(465)));
+        (encoder).writeInt(((Integer) data.get(466)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(467)));
+        (encoder).writeInt(((Integer) data.get(468)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(469)));
+        (encoder).writeInt(((Integer) data.get(470)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(471)));
+        (encoder).writeInt(((Integer) data.get(472)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(473)));
+        (encoder).writeInt(((Integer) data.get(474)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(475)));
+        (encoder).writeInt(((Integer) data.get(476)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(477)));
+        (encoder).writeInt(((Integer) data.get(478)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(479)));
+        (encoder).writeInt(((Integer) data.get(480)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(481)));
+        (encoder).writeInt(((Integer) data.get(482)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(483)));
+        (encoder).writeInt(((Integer) data.get(484)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(485)));
+        (encoder).writeInt(((Integer) data.get(486)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(487)));
+        (encoder).writeInt(((Integer) data.get(488)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(489)));
+        (encoder).writeInt(((Integer) data.get(490)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(491)));
+        (encoder).writeInt(((Integer) data.get(492)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(493)));
+        (encoder).writeInt(((Integer) data.get(494)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(495)));
+        (encoder).writeInt(((Integer) data.get(496)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(497)));
+        (encoder).writeInt(((Integer) data.get(498)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(499)));
+        (encoder).writeInt(((Integer) data.get(500)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(501)));
+        (encoder).writeInt(((Integer) data.get(502)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(503)));
+        (encoder).writeInt(((Integer) data.get(504)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(505)));
+        (encoder).writeInt(((Integer) data.get(506)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(507)));
+        (encoder).writeInt(((Integer) data.get(508)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(509)));
+        (encoder).writeInt(((Integer) data.get(510)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(511)));
+        (encoder).writeInt(((Integer) data.get(512)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(513)));
+        (encoder).writeInt(((Integer) data.get(514)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(515)));
+        (encoder).writeInt(((Integer) data.get(516)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(517)));
+        (encoder).writeInt(((Integer) data.get(518)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(519)));
+        (encoder).writeInt(((Integer) data.get(520)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(521)));
+        (encoder).writeInt(((Integer) data.get(522)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(523)));
+        (encoder).writeInt(((Integer) data.get(524)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(525)));
+        (encoder).writeInt(((Integer) data.get(526)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(527)));
+        (encoder).writeInt(((Integer) data.get(528)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(529)));
+        (encoder).writeInt(((Integer) data.get(530)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(531)));
+        (encoder).writeInt(((Integer) data.get(532)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(533)));
+        (encoder).writeInt(((Integer) data.get(534)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(535)));
+        (encoder).writeInt(((Integer) data.get(536)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(537)));
+        (encoder).writeInt(((Integer) data.get(538)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(539)));
+        (encoder).writeInt(((Integer) data.get(540)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(541)));
+        (encoder).writeInt(((Integer) data.get(542)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(543)));
+        (encoder).writeInt(((Integer) data.get(544)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(545)));
+        (encoder).writeInt(((Integer) data.get(546)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(547)));
+        (encoder).writeInt(((Integer) data.get(548)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(549)));
+        (encoder).writeInt(((Integer) data.get(550)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(551)));
+        (encoder).writeInt(((Integer) data.get(552)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(553)));
+        (encoder).writeInt(((Integer) data.get(554)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(555)));
+        (encoder).writeInt(((Integer) data.get(556)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(557)));
+        (encoder).writeInt(((Integer) data.get(558)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(559)));
+        (encoder).writeInt(((Integer) data.get(560)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(561)));
+        (encoder).writeInt(((Integer) data.get(562)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(563)));
+        (encoder).writeInt(((Integer) data.get(564)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(565)));
+        (encoder).writeInt(((Integer) data.get(566)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(567)));
+        (encoder).writeInt(((Integer) data.get(568)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(569)));
+        (encoder).writeInt(((Integer) data.get(570)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(571)));
+        (encoder).writeInt(((Integer) data.get(572)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(573)));
+        (encoder).writeInt(((Integer) data.get(574)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(575)));
+        (encoder).writeInt(((Integer) data.get(576)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(577)));
+        (encoder).writeInt(((Integer) data.get(578)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(579)));
+        (encoder).writeInt(((Integer) data.get(580)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(581)));
+        (encoder).writeInt(((Integer) data.get(582)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(583)));
+        (encoder).writeInt(((Integer) data.get(584)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(585)));
+        (encoder).writeInt(((Integer) data.get(586)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(587)));
+        (encoder).writeInt(((Integer) data.get(588)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(589)));
+        (encoder).writeInt(((Integer) data.get(590)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(591)));
+        (encoder).writeInt(((Integer) data.get(592)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(593)));
+        (encoder).writeInt(((Integer) data.get(594)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(595)));
+        (encoder).writeInt(((Integer) data.get(596)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(597)));
+        (encoder).writeInt(((Integer) data.get(598)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(599)));
+        (encoder).writeInt(((Integer) data.get(600)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(601)));
+        (encoder).writeInt(((Integer) data.get(602)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(603)));
+        (encoder).writeInt(((Integer) data.get(604)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(605)));
+        (encoder).writeInt(((Integer) data.get(606)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(607)));
+        (encoder).writeInt(((Integer) data.get(608)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(609)));
+        (encoder).writeInt(((Integer) data.get(610)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(611)));
+        (encoder).writeInt(((Integer) data.get(612)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(613)));
+        (encoder).writeInt(((Integer) data.get(614)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(615)));
+        (encoder).writeInt(((Integer) data.get(616)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(617)));
+        (encoder).writeInt(((Integer) data.get(618)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(619)));
+        (encoder).writeInt(((Integer) data.get(620)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(621)));
+        (encoder).writeInt(((Integer) data.get(622)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(623)));
+        (encoder).writeInt(((Integer) data.get(624)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(625)));
+        (encoder).writeInt(((Integer) data.get(626)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(627)));
+        (encoder).writeInt(((Integer) data.get(628)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(629)));
+        (encoder).writeInt(((Integer) data.get(630)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(631)));
+        (encoder).writeInt(((Integer) data.get(632)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(633)));
+        (encoder).writeInt(((Integer) data.get(634)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(635)));
+        (encoder).writeInt(((Integer) data.get(636)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(637)));
+        (encoder).writeInt(((Integer) data.get(638)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(639)));
+        (encoder).writeInt(((Integer) data.get(640)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(641)));
+        (encoder).writeInt(((Integer) data.get(642)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(643)));
+        (encoder).writeInt(((Integer) data.get(644)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(645)));
+        (encoder).writeInt(((Integer) data.get(646)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(647)));
+        (encoder).writeInt(((Integer) data.get(648)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(649)));
+        (encoder).writeInt(((Integer) data.get(650)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(651)));
+        (encoder).writeInt(((Integer) data.get(652)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(653)));
+        (encoder).writeInt(((Integer) data.get(654)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(655)));
+        (encoder).writeInt(((Integer) data.get(656)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(657)));
+        (encoder).writeInt(((Integer) data.get(658)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(659)));
+        (encoder).writeInt(((Integer) data.get(660)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(661)));
+        (encoder).writeInt(((Integer) data.get(662)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(663)));
+        (encoder).writeInt(((Integer) data.get(664)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(665)));
+        (encoder).writeInt(((Integer) data.get(666)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(667)));
+        (encoder).writeInt(((Integer) data.get(668)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(669)));
+        (encoder).writeInt(((Integer) data.get(670)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(671)));
+        (encoder).writeInt(((Integer) data.get(672)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(673)));
+        (encoder).writeInt(((Integer) data.get(674)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(675)));
+        (encoder).writeInt(((Integer) data.get(676)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(677)));
+        (encoder).writeInt(((Integer) data.get(678)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(679)));
+        (encoder).writeInt(((Integer) data.get(680)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(681)));
+        (encoder).writeInt(((Integer) data.get(682)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(683)));
+        (encoder).writeInt(((Integer) data.get(684)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(685)));
+        (encoder).writeInt(((Integer) data.get(686)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(687)));
+        (encoder).writeInt(((Integer) data.get(688)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(689)));
+        (encoder).writeInt(((Integer) data.get(690)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(691)));
+        (encoder).writeInt(((Integer) data.get(692)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(693)));
+        (encoder).writeInt(((Integer) data.get(694)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(695)));
+        (encoder).writeInt(((Integer) data.get(696)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(697)));
+        (encoder).writeInt(((Integer) data.get(698)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(699)));
+        (encoder).writeInt(((Integer) data.get(700)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(701)));
+        (encoder).writeInt(((Integer) data.get(702)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(703)));
+        (encoder).writeInt(((Integer) data.get(704)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(705)));
+        (encoder).writeInt(((Integer) data.get(706)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(707)));
+        (encoder).writeInt(((Integer) data.get(708)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(709)));
+        (encoder).writeInt(((Integer) data.get(710)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(711)));
+        (encoder).writeInt(((Integer) data.get(712)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(713)));
+        (encoder).writeInt(((Integer) data.get(714)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(715)));
+        (encoder).writeInt(((Integer) data.get(716)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(717)));
+        (encoder).writeInt(((Integer) data.get(718)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(719)));
+        (encoder).writeInt(((Integer) data.get(720)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(721)));
+        (encoder).writeInt(((Integer) data.get(722)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(723)));
+        (encoder).writeInt(((Integer) data.get(724)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(725)));
+        (encoder).writeInt(((Integer) data.get(726)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(727)));
+        (encoder).writeInt(((Integer) data.get(728)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(729)));
+        (encoder).writeInt(((Integer) data.get(730)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(731)));
+        (encoder).writeInt(((Integer) data.get(732)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(733)));
+        (encoder).writeInt(((Integer) data.get(734)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(735)));
+        (encoder).writeInt(((Integer) data.get(736)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(737)));
+        (encoder).writeInt(((Integer) data.get(738)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(739)));
+        (encoder).writeInt(((Integer) data.get(740)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(741)));
+        (encoder).writeInt(((Integer) data.get(742)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(743)));
+        (encoder).writeInt(((Integer) data.get(744)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(745)));
+        (encoder).writeInt(((Integer) data.get(746)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(747)));
+        (encoder).writeInt(((Integer) data.get(748)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(749)));
+        (encoder).writeInt(((Integer) data.get(750)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(751)));
+        (encoder).writeInt(((Integer) data.get(752)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(753)));
+        (encoder).writeInt(((Integer) data.get(754)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(755)));
+        (encoder).writeInt(((Integer) data.get(756)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(757)));
+        (encoder).writeInt(((Integer) data.get(758)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(759)));
+        (encoder).writeInt(((Integer) data.get(760)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(761)));
+        (encoder).writeInt(((Integer) data.get(762)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(763)));
+        (encoder).writeInt(((Integer) data.get(764)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(765)));
+        (encoder).writeInt(((Integer) data.get(766)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(767)));
+        (encoder).writeInt(((Integer) data.get(768)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(769)));
+        (encoder).writeInt(((Integer) data.get(770)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(771)));
+        (encoder).writeInt(((Integer) data.get(772)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(773)));
+        (encoder).writeInt(((Integer) data.get(774)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(775)));
+        (encoder).writeInt(((Integer) data.get(776)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(777)));
+        (encoder).writeInt(((Integer) data.get(778)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(779)));
+        (encoder).writeInt(((Integer) data.get(780)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(781)));
+        (encoder).writeInt(((Integer) data.get(782)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(783)));
+        (encoder).writeInt(((Integer) data.get(784)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(785)));
+        (encoder).writeInt(((Integer) data.get(786)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(787)));
+        (encoder).writeInt(((Integer) data.get(788)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(789)));
+        (encoder).writeInt(((Integer) data.get(790)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(791)));
+        (encoder).writeInt(((Integer) data.get(792)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(793)));
+        (encoder).writeInt(((Integer) data.get(794)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(795)));
+        (encoder).writeInt(((Integer) data.get(796)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(797)));
+        (encoder).writeInt(((Integer) data.get(798)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(799)));
+        (encoder).writeInt(((Integer) data.get(800)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(801)));
+        (encoder).writeInt(((Integer) data.get(802)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(803)));
+        (encoder).writeInt(((Integer) data.get(804)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(805)));
+        (encoder).writeInt(((Integer) data.get(806)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(807)));
+        (encoder).writeInt(((Integer) data.get(808)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(809)));
+        (encoder).writeInt(((Integer) data.get(810)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(811)));
+        (encoder).writeInt(((Integer) data.get(812)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(813)));
+        (encoder).writeInt(((Integer) data.get(814)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(815)));
+        (encoder).writeInt(((Integer) data.get(816)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(817)));
+        (encoder).writeInt(((Integer) data.get(818)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(819)));
+        (encoder).writeInt(((Integer) data.get(820)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(821)));
+        (encoder).writeInt(((Integer) data.get(822)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(823)));
+        (encoder).writeInt(((Integer) data.get(824)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(825)));
+        (encoder).writeInt(((Integer) data.get(826)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(827)));
+        (encoder).writeInt(((Integer) data.get(828)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(829)));
+        (encoder).writeInt(((Integer) data.get(830)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(831)));
+        (encoder).writeInt(((Integer) data.get(832)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(833)));
+        (encoder).writeInt(((Integer) data.get(834)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(835)));
+        (encoder).writeInt(((Integer) data.get(836)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(837)));
+        (encoder).writeInt(((Integer) data.get(838)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(839)));
+        (encoder).writeInt(((Integer) data.get(840)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(841)));
+        (encoder).writeInt(((Integer) data.get(842)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(843)));
+        (encoder).writeInt(((Integer) data.get(844)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(845)));
+        (encoder).writeInt(((Integer) data.get(846)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(847)));
+        (encoder).writeInt(((Integer) data.get(848)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(849)));
+        (encoder).writeInt(((Integer) data.get(850)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(851)));
+        (encoder).writeInt(((Integer) data.get(852)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(853)));
+        (encoder).writeInt(((Integer) data.get(854)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(855)));
+        (encoder).writeInt(((Integer) data.get(856)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(857)));
+        (encoder).writeInt(((Integer) data.get(858)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(859)));
+        (encoder).writeInt(((Integer) data.get(860)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(861)));
+        (encoder).writeInt(((Integer) data.get(862)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(863)));
+        (encoder).writeInt(((Integer) data.get(864)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(865)));
+        (encoder).writeInt(((Integer) data.get(866)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(867)));
+        (encoder).writeInt(((Integer) data.get(868)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(869)));
+        (encoder).writeInt(((Integer) data.get(870)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(871)));
+        (encoder).writeInt(((Integer) data.get(872)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(873)));
+        (encoder).writeInt(((Integer) data.get(874)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(875)));
+        (encoder).writeInt(((Integer) data.get(876)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(877)));
+        (encoder).writeInt(((Integer) data.get(878)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(879)));
+        (encoder).writeInt(((Integer) data.get(880)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(881)));
+        (encoder).writeInt(((Integer) data.get(882)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(883)));
+        (encoder).writeInt(((Integer) data.get(884)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(885)));
+        (encoder).writeInt(((Integer) data.get(886)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(887)));
+        (encoder).writeInt(((Integer) data.get(888)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(889)));
+        (encoder).writeInt(((Integer) data.get(890)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(891)));
+        (encoder).writeInt(((Integer) data.get(892)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(893)));
+        (encoder).writeInt(((Integer) data.get(894)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(895)));
+        (encoder).writeInt(((Integer) data.get(896)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(897)));
+        (encoder).writeInt(((Integer) data.get(898)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(899)));
+        (encoder).writeInt(((Integer) data.get(900)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(901)));
+        (encoder).writeInt(((Integer) data.get(902)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(903)));
+        (encoder).writeInt(((Integer) data.get(904)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(905)));
+        (encoder).writeInt(((Integer) data.get(906)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(907)));
+        (encoder).writeInt(((Integer) data.get(908)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(909)));
+        (encoder).writeInt(((Integer) data.get(910)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(911)));
+        (encoder).writeInt(((Integer) data.get(912)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(913)));
+        (encoder).writeInt(((Integer) data.get(914)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(915)));
+        (encoder).writeInt(((Integer) data.get(916)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(917)));
+        (encoder).writeInt(((Integer) data.get(918)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(919)));
+        (encoder).writeInt(((Integer) data.get(920)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(921)));
+        (encoder).writeInt(((Integer) data.get(922)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(923)));
+        (encoder).writeInt(((Integer) data.get(924)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(925)));
+        (encoder).writeInt(((Integer) data.get(926)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(927)));
+        (encoder).writeInt(((Integer) data.get(928)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(929)));
+        (encoder).writeInt(((Integer) data.get(930)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(931)));
+        (encoder).writeInt(((Integer) data.get(932)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(933)));
+        (encoder).writeInt(((Integer) data.get(934)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(935)));
+        (encoder).writeInt(((Integer) data.get(936)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(937)));
+        (encoder).writeInt(((Integer) data.get(938)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(939)));
+        (encoder).writeInt(((Integer) data.get(940)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(941)));
+        (encoder).writeInt(((Integer) data.get(942)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(943)));
+        (encoder).writeInt(((Integer) data.get(944)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(945)));
+        (encoder).writeInt(((Integer) data.get(946)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(947)));
+        (encoder).writeInt(((Integer) data.get(948)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(949)));
+        (encoder).writeInt(((Integer) data.get(950)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(951)));
+        (encoder).writeInt(((Integer) data.get(952)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(953)));
+        (encoder).writeInt(((Integer) data.get(954)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(955)));
+        (encoder).writeInt(((Integer) data.get(956)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(957)));
+        (encoder).writeInt(((Integer) data.get(958)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(959)));
+        (encoder).writeInt(((Integer) data.get(960)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(961)));
+        (encoder).writeInt(((Integer) data.get(962)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(963)));
+        (encoder).writeInt(((Integer) data.get(964)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(965)));
+        (encoder).writeInt(((Integer) data.get(966)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(967)));
+        (encoder).writeInt(((Integer) data.get(968)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(969)));
+        (encoder).writeInt(((Integer) data.get(970)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(971)));
+        (encoder).writeInt(((Integer) data.get(972)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(973)));
+        (encoder).writeInt(((Integer) data.get(974)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(975)));
+        (encoder).writeInt(((Integer) data.get(976)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(977)));
+        (encoder).writeInt(((Integer) data.get(978)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(979)));
+        (encoder).writeInt(((Integer) data.get(980)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(981)));
+        (encoder).writeInt(((Integer) data.get(982)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(983)));
+        (encoder).writeInt(((Integer) data.get(984)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(985)));
+        (encoder).writeInt(((Integer) data.get(986)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(987)));
+        (encoder).writeInt(((Integer) data.get(988)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(989)));
+        (encoder).writeInt(((Integer) data.get(990)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(991)));
+        (encoder).writeInt(((Integer) data.get(992)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(993)));
+        (encoder).writeInt(((Integer) data.get(994)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(995)));
+        (encoder).writeInt(((Integer) data.get(996)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(997)));
+        (encoder).writeInt(((Integer) data.get(998)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(999)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
new file mode 100644
index 000000000..f413c8dd0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
@@ -0,0 +1,116 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericEnumSymbol testEnumUnion0 = ((GenericEnumSymbol) data.get(1));
+        if (testEnumUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testEnumUnion0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) testEnumUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                int valueToWrite1;
+                Object enumValue1 = testEnumUnion0;
+                if (enumValue1 instanceof Enum) {
+                    valueToWrite1 = ((Enum) enumValue1).ordinal();
+                } else {
+                    valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                }
+                (encoder).writeEnum(valueToWrite1);
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray0 = ((List<GenericEnumSymbol> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testEnumArray0 == null)||testEnumArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumArray0 .size());
+            for (int counter0 = 0; (counter0 <testEnumArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                int valueToWrite2;
+                Object enumValue2 = testEnumArray0 .get(counter0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray0 = ((List<GenericEnumSymbol> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testEnumUnionArray0 == null)||testEnumUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testEnumUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericEnumSymbol union0 = null;
+                union0 = ((List<GenericEnumSymbol> ) testEnumUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        int valueToWrite3;
+                        Object enumValue3 = union0;
+                        if (enumValue3 instanceof Enum) {
+                            valueToWrite3 = ((Enum) enumValue3).ordinal();
+                        } else {
+                            valueToWrite3 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite3);
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
new file mode 100644
index 000000000..4644a7278
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
@@ -0,0 +1,88 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericFixed testFixedUnion0 = ((GenericFixed) data.get(1));
+        if (testFixedUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testFixedUnion0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) testFixedUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                (encoder).writeFixed(((GenericFixed) testFixedUnion0).bytes());
+            }
+        }
+        List<GenericFixed> testFixedArray0 = ((List<GenericFixed> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testFixedArray0 == null)||testFixedArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedArray0 .size());
+            for (int counter0 = 0; (counter0 <testFixedArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeFixed(((GenericFixed) testFixedArray0 .get(counter0)).bytes());
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = ((List<GenericFixed> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testFixedUnionArray0 == null)||testFixedUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testFixedUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericFixed union0 = null;
+                union0 = ((List<GenericFixed> ) testFixedUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeFixed(((GenericFixed) union0).bytes());
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
new file mode 100644
index 000000000..defba911b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
@@ -0,0 +1,70 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union0 = ((Object) data.get(0));
+        if (union0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+            } else {
+                if (union0 instanceof CharSequence) {
+                    (encoder).writeIndex(2);
+                    if (((CharSequence) union0) instanceof Utf8) {
+                        (encoder).writeString(((Utf8)((CharSequence) union0)));
+                    } else {
+                        (encoder).writeString(((CharSequence) union0).toString());
+                    }
+                } else {
+                    if (union0 instanceof Integer) {
+                        (encoder).writeIndex(3);
+                        (encoder).writeInt(((Integer) union0));
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
new file mode 100644
index 000000000..782cbd32e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
@@ -0,0 +1,157 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Integer testIntUnion0 = ((Integer) data.get(1));
+        if (testIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeInt(((Integer) testIntUnion0));
+        }
+        Integer testFlippedIntUnion0 = ((Integer) data.get(2));
+        if (testFlippedIntUnion0 == null) {
+            (encoder).writeIndex(1);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(0);
+            (encoder).writeInt(((Integer) testFlippedIntUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        CharSequence testStringUnion0 = ((CharSequence) data.get(4));
+        if (testStringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testStringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testStringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) testStringUnion0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(5)));
+        Long testLongUnion0 = ((Long) data.get(6));
+        if (testLongUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) testLongUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeDouble(((Double) data.get(7)));
+        Double testDoubleUnion0 = ((Double) data.get(8));
+        if (testDoubleUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeDouble(((Double) testDoubleUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFloat(((Float) data.get(9)));
+        Float testFloatUnion0 = ((Float) data.get(10));
+        if (testFloatUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeFloat(((Float) testFloatUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBoolean(((Boolean) data.get(11)));
+        Boolean testBooleanUnion0 = ((Boolean) data.get(12));
+        if (testBooleanUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBoolean(((Boolean) testBooleanUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBytes(((ByteBuffer) data.get(13)));
+        ByteBuffer testBytesUnion0 = ((ByteBuffer) data.get(14));
+        if (testBytesUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBytes(((ByteBuffer) testBytesUnion0));
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
new file mode 100644
index 000000000..8d6ed9006
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union_field0 = ((Object) data.get(0));
+        if (union_field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record1".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeRecord10(((IndexedRecord) union_field0), (encoder), (customization));
+            } else {
+                if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                    (encoder).writeIndex(2);
+                    serializeRecord20(((IndexedRecord) union_field0), (encoder), (customization));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
new file mode 100644
index 000000000..1a84d11e3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> recordsArray0 = ((List<IndexedRecord> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArray0 == null)||recordsArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArray0 .size());
+            for (int counter0 = 0; (counter0 <recordsArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord subRecord0 = null;
+                subRecord0 = ((List<IndexedRecord> ) recordsArray0).get(counter0);
+                serializeSubRecord0(subRecord0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMap0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMap0 == null)||recordsMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) recordsMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord subRecord1 = null;
+                subRecord1 = ((Map<CharSequence, IndexedRecord> ) recordsMap0).get(key0);
+                serializeSubRecord0(subRecord1, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+        List<IndexedRecord> recordsArrayUnion0 = ((List<IndexedRecord> ) data.get(2));
+        if (recordsArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<IndexedRecord> ) recordsArrayUnion0) == null)||((List<IndexedRecord> ) recordsArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<IndexedRecord> ) recordsArrayUnion0).size());
+                    for (int counter1 = 0; (counter1 <((List<IndexedRecord> ) recordsArrayUnion0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union0 = null;
+                        union0 = ((List<IndexedRecord> )((List<IndexedRecord> ) recordsArrayUnion0)).get(counter1);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMapUnion0 = ((Map<CharSequence, IndexedRecord> ) data.get(3));
+        if (recordsMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, IndexedRecord> ) recordsMapUnion0) == null)||((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).size());
+                    for (CharSequence key1 : ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key1);
+                        IndexedRecord union1 = null;
+                        union1 = ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).get(key1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
new file mode 100644
index 000000000..d5d638254
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
@@ -0,0 +1,230 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMap0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArrayMap0 == null)||recordsArrayMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArrayMap0 .size());
+            for (int counter0 = 0; (counter0 <recordsArrayMap0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Map<CharSequence, IndexedRecord> map0 = null;
+                map0 = ((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMap0).get(counter0);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(map0);
+                }
+                (encoder).writeMapStart();
+                if ((map0 == null)||map0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(map0 .size());
+                    for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) map0).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        IndexedRecord union0 = null;
+                        union0 = ((Map<CharSequence, IndexedRecord> ) map0).get(key0);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMapArray0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMapArray0 == null)||recordsMapArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMapArray0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                List<IndexedRecord> array0 = null;
+                array0 = ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).get(key1);
+                (encoder).writeArrayStart();
+                if ((array0 == null)||array0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(array0 .size());
+                    for (int counter1 = 0; (counter1 <array0 .size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union1 = null;
+                        union1 = ((List<IndexedRecord> ) array0).get(counter1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        (encoder).writeMapEnd();
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMapUnion0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(2));
+        if (recordsArrayMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayMapUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0) == null)||((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size());
+                    for (int counter2 = 0; (counter2 <((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size()); counter2 ++) {
+                        (encoder).startItem();
+                        Map<CharSequence, IndexedRecord> map1 = null;
+                        map1 = ((List<Map<CharSequence, IndexedRecord>> )((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0)).get(counter2);
+                        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                            (customization).getCheckMapTypeFunction().apply(map1);
+                        }
+                        (encoder).writeMapStart();
+                        if ((map1 == null)||map1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(map1 .size());
+                            for (CharSequence key2 : ((Map<CharSequence, IndexedRecord> ) map1).keySet()) {
+                                (encoder).startItem();
+                                (encoder).writeString(key2);
+                                IndexedRecord union2 = null;
+                                union2 = ((Map<CharSequence, IndexedRecord> ) map1).get(key2);
+                                if (union2 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union2 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union2).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union2), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeMapEnd();
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArrayUnion0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(3));
+        if (recordsMapArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapArrayUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0) == null)||((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).size());
+                    for (CharSequence key3 : ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key3);
+                        List<IndexedRecord> array1 = null;
+                        array1 = ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).get(key3);
+                        (encoder).writeArrayStart();
+                        if ((array1 == null)||array1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(array1 .size());
+                            for (int counter3 = 0; (counter3 <array1 .size()); counter3 ++) {
+                                (encoder).startItem();
+                                IndexedRecord union3 = null;
+                                union3 = ((List<IndexedRecord> ) array1).get(counter3);
+                                if (union3 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union3 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union3).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union3), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeArrayEnd();
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
new file mode 100644
index 000000000..5ef472593
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record0 = ((IndexedRecord) data.get(0));
+        if (record0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((record0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) record0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) record0), (encoder), (customization));
+            }
+        }
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record10 = ((IndexedRecord) data.get(1));
+        serializeSubRecord0(record10, (encoder), (customization));
+        CharSequence field0 = ((CharSequence) data.get(2));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastSerdeEnums_GenericSerializer_957378572.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastSerdeEnums_GenericSerializer_957378572.java
new file mode 100644
index 000000000..9c975afda
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastSerdeEnums_GenericSerializer_957378572.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeEnums_GenericSerializer_957378572
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> arrayOfEnums0 = ((List<GenericEnumSymbol> ) data.get(1));
+        if (arrayOfEnums0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfEnums0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericEnumSymbol> ) arrayOfEnums0) == null)||((List<GenericEnumSymbol> ) arrayOfEnums0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericEnumSymbol> ) arrayOfEnums0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericEnumSymbol> ) arrayOfEnums0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        int valueToWrite1;
+                        Object enumValue1 = ((List<GenericEnumSymbol> ) arrayOfEnums0).get(counter0);
+                        if (enumValue1 instanceof Enum) {
+                            valueToWrite1 = ((Enum) enumValue1).ordinal();
+                        } else {
+                            valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite1);
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericEnumSymbol> mapOfEnums0 = ((Map<CharSequence, GenericEnumSymbol> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfEnums0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfEnums0 == null)||mapOfEnums0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfEnums0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericEnumSymbol> ) mapOfEnums0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                int valueToWrite2;
+                Object enumValue2 = mapOfEnums0 .get(key0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastSerdeFixed_GenericSerializer_504108934.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastSerdeFixed_GenericSerializer_504108934.java
new file mode 100644
index 000000000..afbda5a99
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastSerdeFixed_GenericSerializer_504108934.java
@@ -0,0 +1,74 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeFixed_GenericSerializer_504108934
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> arrayOfFixed0 = ((List<GenericFixed> ) data.get(1));
+        if (arrayOfFixed0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfFixed0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericFixed> ) arrayOfFixed0) == null)||((List<GenericFixed> ) arrayOfFixed0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericFixed> ) arrayOfFixed0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericFixed> ) arrayOfFixed0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFixed(((GenericFixed)((List<GenericFixed> ) arrayOfFixed0).get(counter0)).bytes());
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericFixed> mapOfFixed0 = ((Map<CharSequence, GenericFixed> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfFixed0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfFixed0 == null)||mapOfFixed0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfFixed0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericFixed> ) mapOfFixed0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                (encoder).writeFixed(((GenericFixed) mapOfFixed0 .get(key0)).bytes());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
new file mode 100644
index 000000000..c5bb26d29
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
new file mode 100644
index 000000000..2cab83e3c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Map_of_UNION_GenericSerializer_2140000109.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Map_of_UNION_GenericSerializer_2140000109.java
new file mode 100644
index 000000000..675230ae2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Map_of_UNION_GenericSerializer_2140000109.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericSerializer_2140000109
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord union0 = null;
+                union0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Map_of_record_GenericSerializer_1677529043.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Map_of_record_GenericSerializer_1677529043.java
new file mode 100644
index 000000000..e7e2fbba3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/Map_of_record_GenericSerializer_1677529043.java
@@ -0,0 +1,57 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericSerializer_1677529043
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord record0 = null;
+                record0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/StringableRecord_SpecificSerializer_842267318.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/StringableRecord_SpecificSerializer_842267318.java
new file mode 100644
index 000000000..305d41cee
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/StringableRecord_SpecificSerializer_842267318.java
@@ -0,0 +1,154 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableSubRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificSerializer_842267318
+    implements FastSerializer<StringableRecord>
+{
+
+
+    public void serialize(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeStringableRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((CharSequence) data.get(0)).toString());
+        serialize_StringableRecord0(data, (encoder), (customization));
+        serialize_StringableRecord1(data, (encoder), (customization));
+        serialize_StringableRecord2(data, (encoder), (customization));
+        serialize_StringableRecord3(data, (encoder), (customization));
+        serialize_StringableRecord4(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((CharSequence) data.get(1)).toString());
+        (encoder).writeString(((CharSequence) data.get(2)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord1(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((CharSequence) data.get(3)).toString());
+        (encoder).writeString(((CharSequence) data.get(4)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord2(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<CharSequence> urlArray0 = ((List<CharSequence> ) data.get(5));
+        (encoder).writeArrayStart();
+        if ((urlArray0 == null)||urlArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlArray0 .size());
+            for (int counter0 = 0; (counter0 <urlArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeString(urlArray0 .get(counter0).toString());
+            }
+        }
+        (encoder).writeArrayEnd();
+        Map<CharSequence, CharSequence> urlMap0 = ((Map<CharSequence, CharSequence> ) data.get(6));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(urlMap0);
+        }
+        (encoder).writeMapStart();
+        if ((urlMap0 == null)||urlMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) urlMap0).keySet()) {
+                (encoder).startItem();
+                String keyString0 = key0 .toString();
+                (encoder).writeString(keyString0);
+                (encoder).writeString(((CharSequence) urlMap0 .get(key0)).toString());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord3(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord0 = ((StringableSubRecord) data.get(7));
+        serializeStringableSubRecord0(subRecord0, (encoder), (customization));
+        AnotherSubRecord subRecordWithSubRecord0 = ((AnotherSubRecord) data.get(8));
+        serializeAnotherSubRecord0(subRecordWithSubRecord0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((CharSequence) data.get(0)).toString());
+        serialize_StringableSubRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object nullStringIntUnion0 = ((Object) data.get(1));
+        if (nullStringIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullStringIntUnion0 instanceof CharSequence) {
+                (encoder).writeIndex(1);
+                if (((CharSequence) nullStringIntUnion0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) nullStringIntUnion0)));
+                } else {
+                    (encoder).writeString(((CharSequence) nullStringIntUnion0).toString());
+                }
+            } else {
+                if (nullStringIntUnion0 instanceof Integer) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeInt(((Integer) nullStringIntUnion0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord1 = ((StringableSubRecord) data.get(0));
+        serializeStringableSubRecord0(subRecord1, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord4(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        String stringUnion0 = ((String) data.get(9));
+        if (stringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeString(((String) stringUnion0).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/TestArrayOfFloats_GenericSerializer_1408566797.java b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/TestArrayOfFloats_GenericSerializer_1408566797.java
new file mode 100644
index 000000000..04c40650a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests16/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_6/TestArrayOfFloats_GenericSerializer_1408566797.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_6;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class TestArrayOfFloats_GenericSerializer_1408566797
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeTestArrayOfFloats0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Float> array_of_float0 = ((List<Float> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((array_of_float0 == null)||array_of_float0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(array_of_float0 .size());
+            Object array0 = array_of_float0;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <array_of_float0 .size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(array_of_float0 .get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
new file mode 100644
index 000000000..193910fc4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_BOOLEAN_GenericDeserializer_869749973_869749973
+    implements FastDeserializer<List<Boolean>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_BOOLEAN_GenericDeserializer_869749973_869749973(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveBooleanList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveBooleanList) {
+            array0 = ((PrimitiveBooleanList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveBooleanArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
new file mode 100644
index 000000000..7b8e05690
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_DOUBLE_GenericDeserializer_18760307_18760307
+    implements FastDeserializer<List<Double>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_DOUBLE_GenericDeserializer_18760307_18760307(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Double> deserialize(List<Double> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveDoubleList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveDoubleList) {
+            array0 = ((PrimitiveDoubleList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveDoubleArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
new file mode 100644
index 000000000..14e6a115e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
@@ -0,0 +1,31 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_FLOAT_GenericDeserializer_1012670397_1012670397
+    implements FastDeserializer<List<Float>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_FLOAT_GenericDeserializer_1012670397_1012670397(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Float> deserialize(List<Float> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveFloatList array0 = null;
+        array0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray((reuse), (decoder)));
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_INT_GenericDeserializer_1012089072_1012089072.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
new file mode 100644
index 000000000..f20090086
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_INT_GenericDeserializer_1012089072_1012089072
+    implements FastDeserializer<List<Integer>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_INT_GenericDeserializer_1012089072_1012089072(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Integer> deserialize(List<Integer> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveIntList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveIntList) {
+            array0 = ((PrimitiveIntList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_LONG_GenericDeserializer_325099267_325099267.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_LONG_GenericDeserializer_325099267_325099267.java
new file mode 100644
index 000000000..f626f7759
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_LONG_GenericDeserializer_325099267_325099267.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_LONG_GenericDeserializer_325099267_325099267
+    implements FastDeserializer<List<Long>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_LONG_GenericDeserializer_325099267_325099267(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Long> deserialize(List<Long> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveLongList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveLongList) {
+            array0 = ((PrimitiveLongList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveLongArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
new file mode 100644
index 000000000..88f6e084a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
@@ -0,0 +1,1058 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_UNION_GenericDeserializer_777827233_777827233.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_UNION_GenericDeserializer_777827233_777827233.java
new file mode 100644
index 000000000..d2fcc07b6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_UNION_GenericDeserializer_777827233_777827233.java
@@ -0,0 +1,94 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericDeserializer_777827233_777827233
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema arrayElemOptionSchema0;
+    private final Schema field0;
+
+    public Array_of_UNION_GenericDeserializer_777827233_777827233(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.arrayElemOptionSchema0 = arrayArrayElemSchema0 .getTypes().get(1);
+        this.field0 = arrayElemOptionSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayElemOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayElemOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
new file mode 100644
index 000000000..da8ab0fc8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
@@ -0,0 +1,1068 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_SpecificDeserializer_1277939469_1277939469
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_UNION_SpecificDeserializer_1277939469_1277939469(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_record_GenericDeserializer_1606337179_2018567528.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_record_GenericDeserializer_1606337179_2018567528.java
new file mode 100644
index 000000000..359c7068e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_record_GenericDeserializer_1606337179_2018567528.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_record_GenericDeserializer_1606337179_2018567528
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionArrayElemSchema0;
+
+    public Array_of_record_GenericDeserializer_1606337179_2018567528(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionArrayElemSchema0 = readerSchema.getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                List<IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                if ((reuse) instanceof List) {
+                    unionOption0 = ((List)(reuse));
+                    unionOption0 .clear();
+                } else {
+                    unionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object unionOptionArrayElementReuseVar0 = null;
+                        if ((reuse) instanceof GenericArray) {
+                            unionOptionArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                        }
+                        unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder), (customization)));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_record_GenericDeserializer_477614132_477614132.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_record_GenericDeserializer_477614132_477614132.java
new file mode 100644
index 000000000..259055347
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Array_of_record_GenericDeserializer_477614132_477614132.java
@@ -0,0 +1,82 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericDeserializer_477614132_477614132
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema field0;
+
+    public Array_of_record_GenericDeserializer_477614132_477614132(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.field0 = arrayArrayElemSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
new file mode 100644
index 000000000..9fea0e8ce
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
@@ -0,0 +1,23040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema f00;
+    private final Schema f10;
+    private final Schema f20;
+    private final Schema f30;
+    private final Schema f40;
+    private final Schema f50;
+    private final Schema f60;
+    private final Schema f70;
+    private final Schema f80;
+    private final Schema f90;
+    private final Schema f100;
+    private final Schema f110;
+    private final Schema f120;
+    private final Schema f130;
+    private final Schema f140;
+    private final Schema f150;
+    private final Schema f160;
+    private final Schema f170;
+    private final Schema f180;
+    private final Schema f190;
+    private final Schema f200;
+    private final Schema f210;
+    private final Schema f220;
+    private final Schema f230;
+    private final Schema f240;
+    private final Schema f250;
+    private final Schema f260;
+    private final Schema f270;
+    private final Schema f280;
+    private final Schema f290;
+    private final Schema f300;
+    private final Schema f310;
+    private final Schema f320;
+    private final Schema f330;
+    private final Schema f340;
+    private final Schema f350;
+    private final Schema f360;
+    private final Schema f370;
+    private final Schema f380;
+    private final Schema f390;
+    private final Schema f400;
+    private final Schema f410;
+    private final Schema f420;
+    private final Schema f430;
+    private final Schema f440;
+    private final Schema f450;
+    private final Schema f460;
+    private final Schema f470;
+    private final Schema f480;
+    private final Schema f490;
+    private final Schema f500;
+    private final Schema f510;
+    private final Schema f520;
+    private final Schema f530;
+    private final Schema f540;
+    private final Schema f550;
+    private final Schema f560;
+    private final Schema f570;
+    private final Schema f580;
+    private final Schema f590;
+    private final Schema f600;
+    private final Schema f610;
+    private final Schema f620;
+    private final Schema f630;
+    private final Schema f640;
+    private final Schema f650;
+    private final Schema f660;
+    private final Schema f670;
+    private final Schema f680;
+    private final Schema f690;
+    private final Schema f700;
+    private final Schema f710;
+    private final Schema f720;
+    private final Schema f730;
+    private final Schema f740;
+    private final Schema f750;
+    private final Schema f760;
+    private final Schema f770;
+    private final Schema f780;
+    private final Schema f790;
+    private final Schema f800;
+    private final Schema f810;
+    private final Schema f820;
+    private final Schema f830;
+    private final Schema f840;
+    private final Schema f850;
+    private final Schema f860;
+    private final Schema f870;
+    private final Schema f880;
+    private final Schema f890;
+    private final Schema f900;
+    private final Schema f910;
+    private final Schema f920;
+    private final Schema f930;
+    private final Schema f940;
+    private final Schema f950;
+    private final Schema f960;
+    private final Schema f970;
+    private final Schema f980;
+    private final Schema f990;
+    private final Schema f1000;
+    private final Schema f1010;
+    private final Schema f1020;
+    private final Schema f1030;
+    private final Schema f1040;
+    private final Schema f1050;
+    private final Schema f1060;
+    private final Schema f1070;
+    private final Schema f1080;
+    private final Schema f1090;
+    private final Schema f1100;
+    private final Schema f1110;
+    private final Schema f1120;
+    private final Schema f1130;
+    private final Schema f1140;
+    private final Schema f1150;
+    private final Schema f1160;
+    private final Schema f1170;
+    private final Schema f1180;
+    private final Schema f1190;
+    private final Schema f1200;
+    private final Schema f1210;
+    private final Schema f1220;
+    private final Schema f1230;
+    private final Schema f1240;
+    private final Schema f1250;
+    private final Schema f1260;
+    private final Schema f1270;
+    private final Schema f1280;
+    private final Schema f1290;
+    private final Schema f1300;
+    private final Schema f1310;
+    private final Schema f1320;
+    private final Schema f1330;
+    private final Schema f1340;
+    private final Schema f1350;
+    private final Schema f1360;
+    private final Schema f1370;
+    private final Schema f1380;
+    private final Schema f1390;
+    private final Schema f1400;
+    private final Schema f1410;
+    private final Schema f1420;
+    private final Schema f1430;
+    private final Schema f1440;
+    private final Schema f1450;
+    private final Schema f1460;
+    private final Schema f1470;
+    private final Schema f1480;
+    private final Schema f1490;
+    private final Schema f1500;
+    private final Schema f1510;
+    private final Schema f1520;
+    private final Schema f1530;
+    private final Schema f1540;
+    private final Schema f1550;
+    private final Schema f1560;
+    private final Schema f1570;
+    private final Schema f1580;
+    private final Schema f1590;
+    private final Schema f1600;
+    private final Schema f1610;
+    private final Schema f1620;
+    private final Schema f1630;
+    private final Schema f1640;
+    private final Schema f1650;
+    private final Schema f1660;
+    private final Schema f1670;
+    private final Schema f1680;
+    private final Schema f1690;
+    private final Schema f1700;
+    private final Schema f1710;
+    private final Schema f1720;
+    private final Schema f1730;
+    private final Schema f1740;
+    private final Schema f1750;
+    private final Schema f1760;
+    private final Schema f1770;
+    private final Schema f1780;
+    private final Schema f1790;
+    private final Schema f1800;
+    private final Schema f1810;
+    private final Schema f1820;
+    private final Schema f1830;
+    private final Schema f1840;
+    private final Schema f1850;
+    private final Schema f1860;
+    private final Schema f1870;
+    private final Schema f1880;
+    private final Schema f1890;
+    private final Schema f1900;
+    private final Schema f1910;
+    private final Schema f1920;
+    private final Schema f1930;
+    private final Schema f1940;
+    private final Schema f1950;
+    private final Schema f1960;
+    private final Schema f1970;
+    private final Schema f1980;
+    private final Schema f1990;
+    private final Schema f2000;
+    private final Schema f2010;
+    private final Schema f2020;
+    private final Schema f2030;
+    private final Schema f2040;
+    private final Schema f2050;
+    private final Schema f2060;
+    private final Schema f2070;
+    private final Schema f2080;
+    private final Schema f2090;
+    private final Schema f2100;
+    private final Schema f2110;
+    private final Schema f2120;
+    private final Schema f2130;
+    private final Schema f2140;
+    private final Schema f2150;
+    private final Schema f2160;
+    private final Schema f2170;
+    private final Schema f2180;
+    private final Schema f2190;
+    private final Schema f2200;
+    private final Schema f2210;
+    private final Schema f2220;
+    private final Schema f2230;
+    private final Schema f2240;
+    private final Schema f2250;
+    private final Schema f2260;
+    private final Schema f2270;
+    private final Schema f2280;
+    private final Schema f2290;
+    private final Schema f2300;
+    private final Schema f2310;
+    private final Schema f2320;
+    private final Schema f2330;
+    private final Schema f2340;
+    private final Schema f2350;
+    private final Schema f2360;
+    private final Schema f2370;
+    private final Schema f2380;
+    private final Schema f2390;
+    private final Schema f2400;
+    private final Schema f2410;
+    private final Schema f2420;
+    private final Schema f2430;
+    private final Schema f2440;
+    private final Schema f2450;
+    private final Schema f2460;
+    private final Schema f2470;
+    private final Schema f2480;
+    private final Schema f2490;
+    private final Schema f2500;
+    private final Schema f2510;
+    private final Schema f2520;
+    private final Schema f2530;
+    private final Schema f2540;
+    private final Schema f2550;
+    private final Schema f2560;
+    private final Schema f2570;
+    private final Schema f2580;
+    private final Schema f2590;
+    private final Schema f2600;
+    private final Schema f2610;
+    private final Schema f2620;
+    private final Schema f2630;
+    private final Schema f2640;
+    private final Schema f2650;
+    private final Schema f2660;
+    private final Schema f2670;
+    private final Schema f2680;
+    private final Schema f2690;
+    private final Schema f2700;
+    private final Schema f2710;
+    private final Schema f2720;
+    private final Schema f2730;
+    private final Schema f2740;
+    private final Schema f2750;
+    private final Schema f2760;
+    private final Schema f2770;
+    private final Schema f2780;
+    private final Schema f2790;
+    private final Schema f2800;
+    private final Schema f2810;
+    private final Schema f2820;
+    private final Schema f2830;
+    private final Schema f2840;
+    private final Schema f2850;
+    private final Schema f2860;
+    private final Schema f2870;
+    private final Schema f2880;
+    private final Schema f2890;
+    private final Schema f2900;
+    private final Schema f2910;
+    private final Schema f2920;
+    private final Schema f2930;
+    private final Schema f2940;
+    private final Schema f2950;
+    private final Schema f2960;
+    private final Schema f2970;
+    private final Schema f2980;
+    private final Schema f2990;
+    private final Schema f3000;
+    private final Schema f3010;
+    private final Schema f3020;
+    private final Schema f3030;
+    private final Schema f3040;
+    private final Schema f3050;
+    private final Schema f3060;
+    private final Schema f3070;
+    private final Schema f3080;
+    private final Schema f3090;
+    private final Schema f3100;
+    private final Schema f3110;
+    private final Schema f3120;
+    private final Schema f3130;
+    private final Schema f3140;
+    private final Schema f3150;
+    private final Schema f3160;
+    private final Schema f3170;
+    private final Schema f3180;
+    private final Schema f3190;
+    private final Schema f3200;
+    private final Schema f3210;
+    private final Schema f3220;
+    private final Schema f3230;
+    private final Schema f3240;
+    private final Schema f3250;
+    private final Schema f3260;
+    private final Schema f3270;
+    private final Schema f3280;
+    private final Schema f3290;
+    private final Schema f3300;
+    private final Schema f3310;
+    private final Schema f3320;
+    private final Schema f3330;
+    private final Schema f3340;
+    private final Schema f3350;
+    private final Schema f3360;
+    private final Schema f3370;
+    private final Schema f3380;
+    private final Schema f3390;
+    private final Schema f3400;
+    private final Schema f3410;
+    private final Schema f3420;
+    private final Schema f3430;
+    private final Schema f3440;
+    private final Schema f3450;
+    private final Schema f3460;
+    private final Schema f3470;
+    private final Schema f3480;
+    private final Schema f3490;
+    private final Schema f3500;
+    private final Schema f3510;
+    private final Schema f3520;
+    private final Schema f3530;
+    private final Schema f3540;
+    private final Schema f3550;
+    private final Schema f3560;
+    private final Schema f3570;
+    private final Schema f3580;
+    private final Schema f3590;
+    private final Schema f3600;
+    private final Schema f3610;
+    private final Schema f3620;
+    private final Schema f3630;
+    private final Schema f3640;
+    private final Schema f3650;
+    private final Schema f3660;
+    private final Schema f3670;
+    private final Schema f3680;
+    private final Schema f3690;
+    private final Schema f3700;
+    private final Schema f3710;
+    private final Schema f3720;
+    private final Schema f3730;
+    private final Schema f3740;
+    private final Schema f3750;
+    private final Schema f3760;
+    private final Schema f3770;
+    private final Schema f3780;
+    private final Schema f3790;
+    private final Schema f3800;
+    private final Schema f3810;
+    private final Schema f3820;
+    private final Schema f3830;
+    private final Schema f3840;
+    private final Schema f3850;
+    private final Schema f3860;
+    private final Schema f3870;
+    private final Schema f3880;
+    private final Schema f3890;
+    private final Schema f3900;
+    private final Schema f3910;
+    private final Schema f3920;
+    private final Schema f3930;
+    private final Schema f3940;
+    private final Schema f3950;
+    private final Schema f3960;
+    private final Schema f3970;
+    private final Schema f3980;
+    private final Schema f3990;
+    private final Schema f4000;
+    private final Schema f4010;
+    private final Schema f4020;
+    private final Schema f4030;
+    private final Schema f4040;
+    private final Schema f4050;
+    private final Schema f4060;
+    private final Schema f4070;
+    private final Schema f4080;
+    private final Schema f4090;
+    private final Schema f4100;
+    private final Schema f4110;
+    private final Schema f4120;
+    private final Schema f4130;
+    private final Schema f4140;
+    private final Schema f4150;
+    private final Schema f4160;
+    private final Schema f4170;
+    private final Schema f4180;
+    private final Schema f4190;
+    private final Schema f4200;
+    private final Schema f4210;
+    private final Schema f4220;
+    private final Schema f4230;
+    private final Schema f4240;
+    private final Schema f4250;
+    private final Schema f4260;
+    private final Schema f4270;
+    private final Schema f4280;
+    private final Schema f4290;
+    private final Schema f4300;
+    private final Schema f4310;
+    private final Schema f4320;
+    private final Schema f4330;
+    private final Schema f4340;
+    private final Schema f4350;
+    private final Schema f4360;
+    private final Schema f4370;
+    private final Schema f4380;
+    private final Schema f4390;
+    private final Schema f4400;
+    private final Schema f4410;
+    private final Schema f4420;
+    private final Schema f4430;
+    private final Schema f4440;
+    private final Schema f4450;
+    private final Schema f4460;
+    private final Schema f4470;
+    private final Schema f4480;
+    private final Schema f4490;
+    private final Schema f4500;
+    private final Schema f4510;
+    private final Schema f4520;
+    private final Schema f4530;
+    private final Schema f4540;
+    private final Schema f4550;
+    private final Schema f4560;
+    private final Schema f4570;
+    private final Schema f4580;
+    private final Schema f4590;
+    private final Schema f4600;
+    private final Schema f4610;
+    private final Schema f4620;
+    private final Schema f4630;
+    private final Schema f4640;
+    private final Schema f4650;
+    private final Schema f4660;
+    private final Schema f4670;
+    private final Schema f4680;
+    private final Schema f4690;
+    private final Schema f4700;
+    private final Schema f4710;
+    private final Schema f4720;
+    private final Schema f4730;
+    private final Schema f4740;
+    private final Schema f4750;
+    private final Schema f4760;
+    private final Schema f4770;
+    private final Schema f4780;
+    private final Schema f4790;
+    private final Schema f4800;
+    private final Schema f4810;
+    private final Schema f4820;
+    private final Schema f4830;
+    private final Schema f4840;
+    private final Schema f4850;
+    private final Schema f4860;
+    private final Schema f4870;
+    private final Schema f4880;
+    private final Schema f4890;
+    private final Schema f4900;
+    private final Schema f4910;
+    private final Schema f4920;
+    private final Schema f4930;
+    private final Schema f4940;
+    private final Schema f4950;
+    private final Schema f4960;
+    private final Schema f4970;
+    private final Schema f4980;
+    private final Schema f4990;
+    private final Schema f5000;
+    private final Schema f5010;
+    private final Schema f5020;
+    private final Schema f5030;
+    private final Schema f5040;
+    private final Schema f5050;
+    private final Schema f5060;
+    private final Schema f5070;
+    private final Schema f5080;
+    private final Schema f5090;
+    private final Schema f5100;
+    private final Schema f5110;
+    private final Schema f5120;
+    private final Schema f5130;
+    private final Schema f5140;
+    private final Schema f5150;
+    private final Schema f5160;
+    private final Schema f5170;
+    private final Schema f5180;
+    private final Schema f5190;
+    private final Schema f5200;
+    private final Schema f5210;
+    private final Schema f5220;
+    private final Schema f5230;
+    private final Schema f5240;
+    private final Schema f5250;
+    private final Schema f5260;
+    private final Schema f5270;
+    private final Schema f5280;
+    private final Schema f5290;
+    private final Schema f5300;
+    private final Schema f5310;
+    private final Schema f5320;
+    private final Schema f5330;
+    private final Schema f5340;
+    private final Schema f5350;
+    private final Schema f5360;
+    private final Schema f5370;
+    private final Schema f5380;
+    private final Schema f5390;
+    private final Schema f5400;
+    private final Schema f5410;
+    private final Schema f5420;
+    private final Schema f5430;
+    private final Schema f5440;
+    private final Schema f5450;
+    private final Schema f5460;
+    private final Schema f5470;
+    private final Schema f5480;
+    private final Schema f5490;
+    private final Schema f5500;
+    private final Schema f5510;
+    private final Schema f5520;
+    private final Schema f5530;
+    private final Schema f5540;
+    private final Schema f5550;
+    private final Schema f5560;
+    private final Schema f5570;
+    private final Schema f5580;
+    private final Schema f5590;
+    private final Schema f5600;
+    private final Schema f5610;
+    private final Schema f5620;
+    private final Schema f5630;
+    private final Schema f5640;
+    private final Schema f5650;
+    private final Schema f5660;
+    private final Schema f5670;
+    private final Schema f5680;
+    private final Schema f5690;
+    private final Schema f5700;
+    private final Schema f5710;
+    private final Schema f5720;
+    private final Schema f5730;
+    private final Schema f5740;
+    private final Schema f5750;
+    private final Schema f5760;
+    private final Schema f5770;
+    private final Schema f5780;
+    private final Schema f5790;
+    private final Schema f5800;
+    private final Schema f5810;
+    private final Schema f5820;
+    private final Schema f5830;
+    private final Schema f5840;
+    private final Schema f5850;
+    private final Schema f5860;
+    private final Schema f5870;
+    private final Schema f5880;
+    private final Schema f5890;
+    private final Schema f5900;
+    private final Schema f5910;
+    private final Schema f5920;
+    private final Schema f5930;
+    private final Schema f5940;
+    private final Schema f5950;
+    private final Schema f5960;
+    private final Schema f5970;
+    private final Schema f5980;
+    private final Schema f5990;
+    private final Schema f6000;
+    private final Schema f6010;
+    private final Schema f6020;
+    private final Schema f6030;
+    private final Schema f6040;
+    private final Schema f6050;
+    private final Schema f6060;
+    private final Schema f6070;
+    private final Schema f6080;
+    private final Schema f6090;
+    private final Schema f6100;
+    private final Schema f6110;
+    private final Schema f6120;
+    private final Schema f6130;
+    private final Schema f6140;
+    private final Schema f6150;
+    private final Schema f6160;
+    private final Schema f6170;
+    private final Schema f6180;
+    private final Schema f6190;
+    private final Schema f6200;
+    private final Schema f6210;
+    private final Schema f6220;
+    private final Schema f6230;
+    private final Schema f6240;
+    private final Schema f6250;
+    private final Schema f6260;
+    private final Schema f6270;
+    private final Schema f6280;
+    private final Schema f6290;
+    private final Schema f6300;
+    private final Schema f6310;
+    private final Schema f6320;
+    private final Schema f6330;
+    private final Schema f6340;
+    private final Schema f6350;
+    private final Schema f6360;
+    private final Schema f6370;
+    private final Schema f6380;
+    private final Schema f6390;
+    private final Schema f6400;
+    private final Schema f6410;
+    private final Schema f6420;
+    private final Schema f6430;
+    private final Schema f6440;
+    private final Schema f6450;
+    private final Schema f6460;
+    private final Schema f6470;
+    private final Schema f6480;
+    private final Schema f6490;
+    private final Schema f6500;
+    private final Schema f6510;
+    private final Schema f6520;
+    private final Schema f6530;
+    private final Schema f6540;
+    private final Schema f6550;
+    private final Schema f6560;
+    private final Schema f6570;
+    private final Schema f6580;
+    private final Schema f6590;
+    private final Schema f6600;
+    private final Schema f6610;
+    private final Schema f6620;
+    private final Schema f6630;
+    private final Schema f6640;
+    private final Schema f6650;
+    private final Schema f6660;
+    private final Schema f6670;
+    private final Schema f6680;
+    private final Schema f6690;
+    private final Schema f6700;
+    private final Schema f6710;
+    private final Schema f6720;
+    private final Schema f6730;
+    private final Schema f6740;
+    private final Schema f6750;
+    private final Schema f6760;
+    private final Schema f6770;
+    private final Schema f6780;
+    private final Schema f6790;
+    private final Schema f6800;
+    private final Schema f6810;
+    private final Schema f6820;
+    private final Schema f6830;
+    private final Schema f6840;
+    private final Schema f6850;
+    private final Schema f6860;
+    private final Schema f6870;
+    private final Schema f6880;
+    private final Schema f6890;
+    private final Schema f6900;
+    private final Schema f6910;
+    private final Schema f6920;
+    private final Schema f6930;
+    private final Schema f6940;
+    private final Schema f6950;
+    private final Schema f6960;
+    private final Schema f6970;
+    private final Schema f6980;
+    private final Schema f6990;
+    private final Schema f7000;
+    private final Schema f7010;
+    private final Schema f7020;
+    private final Schema f7030;
+    private final Schema f7040;
+    private final Schema f7050;
+    private final Schema f7060;
+    private final Schema f7070;
+    private final Schema f7080;
+    private final Schema f7090;
+    private final Schema f7100;
+    private final Schema f7110;
+    private final Schema f7120;
+    private final Schema f7130;
+    private final Schema f7140;
+    private final Schema f7150;
+    private final Schema f7160;
+    private final Schema f7170;
+    private final Schema f7180;
+    private final Schema f7190;
+    private final Schema f7200;
+    private final Schema f7210;
+    private final Schema f7220;
+    private final Schema f7230;
+    private final Schema f7240;
+    private final Schema f7250;
+    private final Schema f7260;
+    private final Schema f7270;
+    private final Schema f7280;
+    private final Schema f7290;
+    private final Schema f7300;
+    private final Schema f7310;
+    private final Schema f7320;
+    private final Schema f7330;
+    private final Schema f7340;
+    private final Schema f7350;
+    private final Schema f7360;
+    private final Schema f7370;
+    private final Schema f7380;
+    private final Schema f7390;
+    private final Schema f7400;
+    private final Schema f7410;
+    private final Schema f7420;
+    private final Schema f7430;
+    private final Schema f7440;
+    private final Schema f7450;
+    private final Schema f7460;
+    private final Schema f7470;
+    private final Schema f7480;
+    private final Schema f7490;
+    private final Schema f7500;
+    private final Schema f7510;
+    private final Schema f7520;
+    private final Schema f7530;
+    private final Schema f7540;
+    private final Schema f7550;
+    private final Schema f7560;
+    private final Schema f7570;
+    private final Schema f7580;
+    private final Schema f7590;
+    private final Schema f7600;
+    private final Schema f7610;
+    private final Schema f7620;
+    private final Schema f7630;
+    private final Schema f7640;
+    private final Schema f7650;
+    private final Schema f7660;
+    private final Schema f7670;
+    private final Schema f7680;
+    private final Schema f7690;
+    private final Schema f7700;
+    private final Schema f7710;
+    private final Schema f7720;
+    private final Schema f7730;
+    private final Schema f7740;
+    private final Schema f7750;
+    private final Schema f7760;
+    private final Schema f7770;
+    private final Schema f7780;
+    private final Schema f7790;
+    private final Schema f7800;
+    private final Schema f7810;
+    private final Schema f7820;
+    private final Schema f7830;
+    private final Schema f7840;
+    private final Schema f7850;
+    private final Schema f7860;
+    private final Schema f7870;
+    private final Schema f7880;
+    private final Schema f7890;
+    private final Schema f7900;
+    private final Schema f7910;
+    private final Schema f7920;
+    private final Schema f7930;
+    private final Schema f7940;
+    private final Schema f7950;
+    private final Schema f7960;
+    private final Schema f7970;
+    private final Schema f7980;
+    private final Schema f7990;
+    private final Schema f8000;
+    private final Schema f8010;
+    private final Schema f8020;
+    private final Schema f8030;
+    private final Schema f8040;
+    private final Schema f8050;
+    private final Schema f8060;
+    private final Schema f8070;
+    private final Schema f8080;
+    private final Schema f8090;
+    private final Schema f8100;
+    private final Schema f8110;
+    private final Schema f8120;
+    private final Schema f8130;
+    private final Schema f8140;
+    private final Schema f8150;
+    private final Schema f8160;
+    private final Schema f8170;
+    private final Schema f8180;
+    private final Schema f8190;
+    private final Schema f8200;
+    private final Schema f8210;
+    private final Schema f8220;
+    private final Schema f8230;
+    private final Schema f8240;
+    private final Schema f8250;
+    private final Schema f8260;
+    private final Schema f8270;
+    private final Schema f8280;
+    private final Schema f8290;
+    private final Schema f8300;
+    private final Schema f8310;
+    private final Schema f8320;
+    private final Schema f8330;
+    private final Schema f8340;
+    private final Schema f8350;
+    private final Schema f8360;
+    private final Schema f8370;
+    private final Schema f8380;
+    private final Schema f8390;
+    private final Schema f8400;
+    private final Schema f8410;
+    private final Schema f8420;
+    private final Schema f8430;
+    private final Schema f8440;
+    private final Schema f8450;
+    private final Schema f8460;
+    private final Schema f8470;
+    private final Schema f8480;
+    private final Schema f8490;
+    private final Schema f8500;
+    private final Schema f8510;
+    private final Schema f8520;
+    private final Schema f8530;
+    private final Schema f8540;
+    private final Schema f8550;
+    private final Schema f8560;
+    private final Schema f8570;
+    private final Schema f8580;
+    private final Schema f8590;
+    private final Schema f8600;
+    private final Schema f8610;
+    private final Schema f8620;
+    private final Schema f8630;
+    private final Schema f8640;
+    private final Schema f8650;
+    private final Schema f8660;
+    private final Schema f8670;
+    private final Schema f8680;
+    private final Schema f8690;
+    private final Schema f8700;
+    private final Schema f8710;
+    private final Schema f8720;
+    private final Schema f8730;
+    private final Schema f8740;
+    private final Schema f8750;
+    private final Schema f8760;
+    private final Schema f8770;
+    private final Schema f8780;
+    private final Schema f8790;
+    private final Schema f8800;
+    private final Schema f8810;
+    private final Schema f8820;
+    private final Schema f8830;
+    private final Schema f8840;
+    private final Schema f8850;
+    private final Schema f8860;
+    private final Schema f8870;
+    private final Schema f8880;
+    private final Schema f8890;
+    private final Schema f8900;
+    private final Schema f8910;
+    private final Schema f8920;
+    private final Schema f8930;
+    private final Schema f8940;
+    private final Schema f8950;
+    private final Schema f8960;
+    private final Schema f8970;
+    private final Schema f8980;
+    private final Schema f8990;
+    private final Schema f9000;
+    private final Schema f9010;
+    private final Schema f9020;
+    private final Schema f9030;
+    private final Schema f9040;
+    private final Schema f9050;
+    private final Schema f9060;
+    private final Schema f9070;
+    private final Schema f9080;
+    private final Schema f9090;
+    private final Schema f9100;
+    private final Schema f9110;
+    private final Schema f9120;
+    private final Schema f9130;
+    private final Schema f9140;
+    private final Schema f9150;
+    private final Schema f9160;
+    private final Schema f9170;
+    private final Schema f9180;
+    private final Schema f9190;
+    private final Schema f9200;
+    private final Schema f9210;
+    private final Schema f9220;
+    private final Schema f9230;
+    private final Schema f9240;
+    private final Schema f9250;
+    private final Schema f9260;
+    private final Schema f9270;
+    private final Schema f9280;
+    private final Schema f9290;
+    private final Schema f9300;
+    private final Schema f9310;
+    private final Schema f9320;
+    private final Schema f9330;
+    private final Schema f9340;
+    private final Schema f9350;
+    private final Schema f9360;
+    private final Schema f9370;
+    private final Schema f9380;
+    private final Schema f9390;
+    private final Schema f9400;
+    private final Schema f9410;
+    private final Schema f9420;
+    private final Schema f9430;
+    private final Schema f9440;
+    private final Schema f9450;
+    private final Schema f9460;
+    private final Schema f9470;
+    private final Schema f9480;
+    private final Schema f9490;
+    private final Schema f9500;
+    private final Schema f9510;
+    private final Schema f9520;
+    private final Schema f9530;
+    private final Schema f9540;
+    private final Schema f9550;
+    private final Schema f9560;
+    private final Schema f9570;
+    private final Schema f9580;
+    private final Schema f9590;
+    private final Schema f9600;
+    private final Schema f9610;
+    private final Schema f9620;
+    private final Schema f9630;
+    private final Schema f9640;
+    private final Schema f9650;
+    private final Schema f9660;
+    private final Schema f9670;
+    private final Schema f9680;
+    private final Schema f9690;
+    private final Schema f9700;
+    private final Schema f9710;
+    private final Schema f9720;
+    private final Schema f9730;
+    private final Schema f9740;
+    private final Schema f9750;
+    private final Schema f9760;
+    private final Schema f9770;
+    private final Schema f9780;
+    private final Schema f9790;
+    private final Schema f9800;
+    private final Schema f9810;
+    private final Schema f9820;
+    private final Schema f9830;
+    private final Schema f9840;
+    private final Schema f9850;
+    private final Schema f9860;
+    private final Schema f9870;
+    private final Schema f9880;
+    private final Schema f9890;
+    private final Schema f9900;
+    private final Schema f9910;
+    private final Schema f9920;
+    private final Schema f9930;
+    private final Schema f9940;
+    private final Schema f9950;
+    private final Schema f9960;
+    private final Schema f9970;
+    private final Schema f9980;
+    private final Schema f9990;
+
+    public FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.f00 = readerSchema.getField("F0").schema();
+        this.f10 = readerSchema.getField("F1").schema();
+        this.f20 = readerSchema.getField("F2").schema();
+        this.f30 = readerSchema.getField("F3").schema();
+        this.f40 = readerSchema.getField("F4").schema();
+        this.f50 = readerSchema.getField("F5").schema();
+        this.f60 = readerSchema.getField("F6").schema();
+        this.f70 = readerSchema.getField("F7").schema();
+        this.f80 = readerSchema.getField("F8").schema();
+        this.f90 = readerSchema.getField("F9").schema();
+        this.f100 = readerSchema.getField("F10").schema();
+        this.f110 = readerSchema.getField("F11").schema();
+        this.f120 = readerSchema.getField("F12").schema();
+        this.f130 = readerSchema.getField("F13").schema();
+        this.f140 = readerSchema.getField("F14").schema();
+        this.f150 = readerSchema.getField("F15").schema();
+        this.f160 = readerSchema.getField("F16").schema();
+        this.f170 = readerSchema.getField("F17").schema();
+        this.f180 = readerSchema.getField("F18").schema();
+        this.f190 = readerSchema.getField("F19").schema();
+        this.f200 = readerSchema.getField("F20").schema();
+        this.f210 = readerSchema.getField("F21").schema();
+        this.f220 = readerSchema.getField("F22").schema();
+        this.f230 = readerSchema.getField("F23").schema();
+        this.f240 = readerSchema.getField("F24").schema();
+        this.f250 = readerSchema.getField("F25").schema();
+        this.f260 = readerSchema.getField("F26").schema();
+        this.f270 = readerSchema.getField("F27").schema();
+        this.f280 = readerSchema.getField("F28").schema();
+        this.f290 = readerSchema.getField("F29").schema();
+        this.f300 = readerSchema.getField("F30").schema();
+        this.f310 = readerSchema.getField("F31").schema();
+        this.f320 = readerSchema.getField("F32").schema();
+        this.f330 = readerSchema.getField("F33").schema();
+        this.f340 = readerSchema.getField("F34").schema();
+        this.f350 = readerSchema.getField("F35").schema();
+        this.f360 = readerSchema.getField("F36").schema();
+        this.f370 = readerSchema.getField("F37").schema();
+        this.f380 = readerSchema.getField("F38").schema();
+        this.f390 = readerSchema.getField("F39").schema();
+        this.f400 = readerSchema.getField("F40").schema();
+        this.f410 = readerSchema.getField("F41").schema();
+        this.f420 = readerSchema.getField("F42").schema();
+        this.f430 = readerSchema.getField("F43").schema();
+        this.f440 = readerSchema.getField("F44").schema();
+        this.f450 = readerSchema.getField("F45").schema();
+        this.f460 = readerSchema.getField("F46").schema();
+        this.f470 = readerSchema.getField("F47").schema();
+        this.f480 = readerSchema.getField("F48").schema();
+        this.f490 = readerSchema.getField("F49").schema();
+        this.f500 = readerSchema.getField("F50").schema();
+        this.f510 = readerSchema.getField("F51").schema();
+        this.f520 = readerSchema.getField("F52").schema();
+        this.f530 = readerSchema.getField("F53").schema();
+        this.f540 = readerSchema.getField("F54").schema();
+        this.f550 = readerSchema.getField("F55").schema();
+        this.f560 = readerSchema.getField("F56").schema();
+        this.f570 = readerSchema.getField("F57").schema();
+        this.f580 = readerSchema.getField("F58").schema();
+        this.f590 = readerSchema.getField("F59").schema();
+        this.f600 = readerSchema.getField("F60").schema();
+        this.f610 = readerSchema.getField("F61").schema();
+        this.f620 = readerSchema.getField("F62").schema();
+        this.f630 = readerSchema.getField("F63").schema();
+        this.f640 = readerSchema.getField("F64").schema();
+        this.f650 = readerSchema.getField("F65").schema();
+        this.f660 = readerSchema.getField("F66").schema();
+        this.f670 = readerSchema.getField("F67").schema();
+        this.f680 = readerSchema.getField("F68").schema();
+        this.f690 = readerSchema.getField("F69").schema();
+        this.f700 = readerSchema.getField("F70").schema();
+        this.f710 = readerSchema.getField("F71").schema();
+        this.f720 = readerSchema.getField("F72").schema();
+        this.f730 = readerSchema.getField("F73").schema();
+        this.f740 = readerSchema.getField("F74").schema();
+        this.f750 = readerSchema.getField("F75").schema();
+        this.f760 = readerSchema.getField("F76").schema();
+        this.f770 = readerSchema.getField("F77").schema();
+        this.f780 = readerSchema.getField("F78").schema();
+        this.f790 = readerSchema.getField("F79").schema();
+        this.f800 = readerSchema.getField("F80").schema();
+        this.f810 = readerSchema.getField("F81").schema();
+        this.f820 = readerSchema.getField("F82").schema();
+        this.f830 = readerSchema.getField("F83").schema();
+        this.f840 = readerSchema.getField("F84").schema();
+        this.f850 = readerSchema.getField("F85").schema();
+        this.f860 = readerSchema.getField("F86").schema();
+        this.f870 = readerSchema.getField("F87").schema();
+        this.f880 = readerSchema.getField("F88").schema();
+        this.f890 = readerSchema.getField("F89").schema();
+        this.f900 = readerSchema.getField("F90").schema();
+        this.f910 = readerSchema.getField("F91").schema();
+        this.f920 = readerSchema.getField("F92").schema();
+        this.f930 = readerSchema.getField("F93").schema();
+        this.f940 = readerSchema.getField("F94").schema();
+        this.f950 = readerSchema.getField("F95").schema();
+        this.f960 = readerSchema.getField("F96").schema();
+        this.f970 = readerSchema.getField("F97").schema();
+        this.f980 = readerSchema.getField("F98").schema();
+        this.f990 = readerSchema.getField("F99").schema();
+        this.f1000 = readerSchema.getField("F100").schema();
+        this.f1010 = readerSchema.getField("F101").schema();
+        this.f1020 = readerSchema.getField("F102").schema();
+        this.f1030 = readerSchema.getField("F103").schema();
+        this.f1040 = readerSchema.getField("F104").schema();
+        this.f1050 = readerSchema.getField("F105").schema();
+        this.f1060 = readerSchema.getField("F106").schema();
+        this.f1070 = readerSchema.getField("F107").schema();
+        this.f1080 = readerSchema.getField("F108").schema();
+        this.f1090 = readerSchema.getField("F109").schema();
+        this.f1100 = readerSchema.getField("F110").schema();
+        this.f1110 = readerSchema.getField("F111").schema();
+        this.f1120 = readerSchema.getField("F112").schema();
+        this.f1130 = readerSchema.getField("F113").schema();
+        this.f1140 = readerSchema.getField("F114").schema();
+        this.f1150 = readerSchema.getField("F115").schema();
+        this.f1160 = readerSchema.getField("F116").schema();
+        this.f1170 = readerSchema.getField("F117").schema();
+        this.f1180 = readerSchema.getField("F118").schema();
+        this.f1190 = readerSchema.getField("F119").schema();
+        this.f1200 = readerSchema.getField("F120").schema();
+        this.f1210 = readerSchema.getField("F121").schema();
+        this.f1220 = readerSchema.getField("F122").schema();
+        this.f1230 = readerSchema.getField("F123").schema();
+        this.f1240 = readerSchema.getField("F124").schema();
+        this.f1250 = readerSchema.getField("F125").schema();
+        this.f1260 = readerSchema.getField("F126").schema();
+        this.f1270 = readerSchema.getField("F127").schema();
+        this.f1280 = readerSchema.getField("F128").schema();
+        this.f1290 = readerSchema.getField("F129").schema();
+        this.f1300 = readerSchema.getField("F130").schema();
+        this.f1310 = readerSchema.getField("F131").schema();
+        this.f1320 = readerSchema.getField("F132").schema();
+        this.f1330 = readerSchema.getField("F133").schema();
+        this.f1340 = readerSchema.getField("F134").schema();
+        this.f1350 = readerSchema.getField("F135").schema();
+        this.f1360 = readerSchema.getField("F136").schema();
+        this.f1370 = readerSchema.getField("F137").schema();
+        this.f1380 = readerSchema.getField("F138").schema();
+        this.f1390 = readerSchema.getField("F139").schema();
+        this.f1400 = readerSchema.getField("F140").schema();
+        this.f1410 = readerSchema.getField("F141").schema();
+        this.f1420 = readerSchema.getField("F142").schema();
+        this.f1430 = readerSchema.getField("F143").schema();
+        this.f1440 = readerSchema.getField("F144").schema();
+        this.f1450 = readerSchema.getField("F145").schema();
+        this.f1460 = readerSchema.getField("F146").schema();
+        this.f1470 = readerSchema.getField("F147").schema();
+        this.f1480 = readerSchema.getField("F148").schema();
+        this.f1490 = readerSchema.getField("F149").schema();
+        this.f1500 = readerSchema.getField("F150").schema();
+        this.f1510 = readerSchema.getField("F151").schema();
+        this.f1520 = readerSchema.getField("F152").schema();
+        this.f1530 = readerSchema.getField("F153").schema();
+        this.f1540 = readerSchema.getField("F154").schema();
+        this.f1550 = readerSchema.getField("F155").schema();
+        this.f1560 = readerSchema.getField("F156").schema();
+        this.f1570 = readerSchema.getField("F157").schema();
+        this.f1580 = readerSchema.getField("F158").schema();
+        this.f1590 = readerSchema.getField("F159").schema();
+        this.f1600 = readerSchema.getField("F160").schema();
+        this.f1610 = readerSchema.getField("F161").schema();
+        this.f1620 = readerSchema.getField("F162").schema();
+        this.f1630 = readerSchema.getField("F163").schema();
+        this.f1640 = readerSchema.getField("F164").schema();
+        this.f1650 = readerSchema.getField("F165").schema();
+        this.f1660 = readerSchema.getField("F166").schema();
+        this.f1670 = readerSchema.getField("F167").schema();
+        this.f1680 = readerSchema.getField("F168").schema();
+        this.f1690 = readerSchema.getField("F169").schema();
+        this.f1700 = readerSchema.getField("F170").schema();
+        this.f1710 = readerSchema.getField("F171").schema();
+        this.f1720 = readerSchema.getField("F172").schema();
+        this.f1730 = readerSchema.getField("F173").schema();
+        this.f1740 = readerSchema.getField("F174").schema();
+        this.f1750 = readerSchema.getField("F175").schema();
+        this.f1760 = readerSchema.getField("F176").schema();
+        this.f1770 = readerSchema.getField("F177").schema();
+        this.f1780 = readerSchema.getField("F178").schema();
+        this.f1790 = readerSchema.getField("F179").schema();
+        this.f1800 = readerSchema.getField("F180").schema();
+        this.f1810 = readerSchema.getField("F181").schema();
+        this.f1820 = readerSchema.getField("F182").schema();
+        this.f1830 = readerSchema.getField("F183").schema();
+        this.f1840 = readerSchema.getField("F184").schema();
+        this.f1850 = readerSchema.getField("F185").schema();
+        this.f1860 = readerSchema.getField("F186").schema();
+        this.f1870 = readerSchema.getField("F187").schema();
+        this.f1880 = readerSchema.getField("F188").schema();
+        this.f1890 = readerSchema.getField("F189").schema();
+        this.f1900 = readerSchema.getField("F190").schema();
+        this.f1910 = readerSchema.getField("F191").schema();
+        this.f1920 = readerSchema.getField("F192").schema();
+        this.f1930 = readerSchema.getField("F193").schema();
+        this.f1940 = readerSchema.getField("F194").schema();
+        this.f1950 = readerSchema.getField("F195").schema();
+        this.f1960 = readerSchema.getField("F196").schema();
+        this.f1970 = readerSchema.getField("F197").schema();
+        this.f1980 = readerSchema.getField("F198").schema();
+        this.f1990 = readerSchema.getField("F199").schema();
+        this.f2000 = readerSchema.getField("F200").schema();
+        this.f2010 = readerSchema.getField("F201").schema();
+        this.f2020 = readerSchema.getField("F202").schema();
+        this.f2030 = readerSchema.getField("F203").schema();
+        this.f2040 = readerSchema.getField("F204").schema();
+        this.f2050 = readerSchema.getField("F205").schema();
+        this.f2060 = readerSchema.getField("F206").schema();
+        this.f2070 = readerSchema.getField("F207").schema();
+        this.f2080 = readerSchema.getField("F208").schema();
+        this.f2090 = readerSchema.getField("F209").schema();
+        this.f2100 = readerSchema.getField("F210").schema();
+        this.f2110 = readerSchema.getField("F211").schema();
+        this.f2120 = readerSchema.getField("F212").schema();
+        this.f2130 = readerSchema.getField("F213").schema();
+        this.f2140 = readerSchema.getField("F214").schema();
+        this.f2150 = readerSchema.getField("F215").schema();
+        this.f2160 = readerSchema.getField("F216").schema();
+        this.f2170 = readerSchema.getField("F217").schema();
+        this.f2180 = readerSchema.getField("F218").schema();
+        this.f2190 = readerSchema.getField("F219").schema();
+        this.f2200 = readerSchema.getField("F220").schema();
+        this.f2210 = readerSchema.getField("F221").schema();
+        this.f2220 = readerSchema.getField("F222").schema();
+        this.f2230 = readerSchema.getField("F223").schema();
+        this.f2240 = readerSchema.getField("F224").schema();
+        this.f2250 = readerSchema.getField("F225").schema();
+        this.f2260 = readerSchema.getField("F226").schema();
+        this.f2270 = readerSchema.getField("F227").schema();
+        this.f2280 = readerSchema.getField("F228").schema();
+        this.f2290 = readerSchema.getField("F229").schema();
+        this.f2300 = readerSchema.getField("F230").schema();
+        this.f2310 = readerSchema.getField("F231").schema();
+        this.f2320 = readerSchema.getField("F232").schema();
+        this.f2330 = readerSchema.getField("F233").schema();
+        this.f2340 = readerSchema.getField("F234").schema();
+        this.f2350 = readerSchema.getField("F235").schema();
+        this.f2360 = readerSchema.getField("F236").schema();
+        this.f2370 = readerSchema.getField("F237").schema();
+        this.f2380 = readerSchema.getField("F238").schema();
+        this.f2390 = readerSchema.getField("F239").schema();
+        this.f2400 = readerSchema.getField("F240").schema();
+        this.f2410 = readerSchema.getField("F241").schema();
+        this.f2420 = readerSchema.getField("F242").schema();
+        this.f2430 = readerSchema.getField("F243").schema();
+        this.f2440 = readerSchema.getField("F244").schema();
+        this.f2450 = readerSchema.getField("F245").schema();
+        this.f2460 = readerSchema.getField("F246").schema();
+        this.f2470 = readerSchema.getField("F247").schema();
+        this.f2480 = readerSchema.getField("F248").schema();
+        this.f2490 = readerSchema.getField("F249").schema();
+        this.f2500 = readerSchema.getField("F250").schema();
+        this.f2510 = readerSchema.getField("F251").schema();
+        this.f2520 = readerSchema.getField("F252").schema();
+        this.f2530 = readerSchema.getField("F253").schema();
+        this.f2540 = readerSchema.getField("F254").schema();
+        this.f2550 = readerSchema.getField("F255").schema();
+        this.f2560 = readerSchema.getField("F256").schema();
+        this.f2570 = readerSchema.getField("F257").schema();
+        this.f2580 = readerSchema.getField("F258").schema();
+        this.f2590 = readerSchema.getField("F259").schema();
+        this.f2600 = readerSchema.getField("F260").schema();
+        this.f2610 = readerSchema.getField("F261").schema();
+        this.f2620 = readerSchema.getField("F262").schema();
+        this.f2630 = readerSchema.getField("F263").schema();
+        this.f2640 = readerSchema.getField("F264").schema();
+        this.f2650 = readerSchema.getField("F265").schema();
+        this.f2660 = readerSchema.getField("F266").schema();
+        this.f2670 = readerSchema.getField("F267").schema();
+        this.f2680 = readerSchema.getField("F268").schema();
+        this.f2690 = readerSchema.getField("F269").schema();
+        this.f2700 = readerSchema.getField("F270").schema();
+        this.f2710 = readerSchema.getField("F271").schema();
+        this.f2720 = readerSchema.getField("F272").schema();
+        this.f2730 = readerSchema.getField("F273").schema();
+        this.f2740 = readerSchema.getField("F274").schema();
+        this.f2750 = readerSchema.getField("F275").schema();
+        this.f2760 = readerSchema.getField("F276").schema();
+        this.f2770 = readerSchema.getField("F277").schema();
+        this.f2780 = readerSchema.getField("F278").schema();
+        this.f2790 = readerSchema.getField("F279").schema();
+        this.f2800 = readerSchema.getField("F280").schema();
+        this.f2810 = readerSchema.getField("F281").schema();
+        this.f2820 = readerSchema.getField("F282").schema();
+        this.f2830 = readerSchema.getField("F283").schema();
+        this.f2840 = readerSchema.getField("F284").schema();
+        this.f2850 = readerSchema.getField("F285").schema();
+        this.f2860 = readerSchema.getField("F286").schema();
+        this.f2870 = readerSchema.getField("F287").schema();
+        this.f2880 = readerSchema.getField("F288").schema();
+        this.f2890 = readerSchema.getField("F289").schema();
+        this.f2900 = readerSchema.getField("F290").schema();
+        this.f2910 = readerSchema.getField("F291").schema();
+        this.f2920 = readerSchema.getField("F292").schema();
+        this.f2930 = readerSchema.getField("F293").schema();
+        this.f2940 = readerSchema.getField("F294").schema();
+        this.f2950 = readerSchema.getField("F295").schema();
+        this.f2960 = readerSchema.getField("F296").schema();
+        this.f2970 = readerSchema.getField("F297").schema();
+        this.f2980 = readerSchema.getField("F298").schema();
+        this.f2990 = readerSchema.getField("F299").schema();
+        this.f3000 = readerSchema.getField("F300").schema();
+        this.f3010 = readerSchema.getField("F301").schema();
+        this.f3020 = readerSchema.getField("F302").schema();
+        this.f3030 = readerSchema.getField("F303").schema();
+        this.f3040 = readerSchema.getField("F304").schema();
+        this.f3050 = readerSchema.getField("F305").schema();
+        this.f3060 = readerSchema.getField("F306").schema();
+        this.f3070 = readerSchema.getField("F307").schema();
+        this.f3080 = readerSchema.getField("F308").schema();
+        this.f3090 = readerSchema.getField("F309").schema();
+        this.f3100 = readerSchema.getField("F310").schema();
+        this.f3110 = readerSchema.getField("F311").schema();
+        this.f3120 = readerSchema.getField("F312").schema();
+        this.f3130 = readerSchema.getField("F313").schema();
+        this.f3140 = readerSchema.getField("F314").schema();
+        this.f3150 = readerSchema.getField("F315").schema();
+        this.f3160 = readerSchema.getField("F316").schema();
+        this.f3170 = readerSchema.getField("F317").schema();
+        this.f3180 = readerSchema.getField("F318").schema();
+        this.f3190 = readerSchema.getField("F319").schema();
+        this.f3200 = readerSchema.getField("F320").schema();
+        this.f3210 = readerSchema.getField("F321").schema();
+        this.f3220 = readerSchema.getField("F322").schema();
+        this.f3230 = readerSchema.getField("F323").schema();
+        this.f3240 = readerSchema.getField("F324").schema();
+        this.f3250 = readerSchema.getField("F325").schema();
+        this.f3260 = readerSchema.getField("F326").schema();
+        this.f3270 = readerSchema.getField("F327").schema();
+        this.f3280 = readerSchema.getField("F328").schema();
+        this.f3290 = readerSchema.getField("F329").schema();
+        this.f3300 = readerSchema.getField("F330").schema();
+        this.f3310 = readerSchema.getField("F331").schema();
+        this.f3320 = readerSchema.getField("F332").schema();
+        this.f3330 = readerSchema.getField("F333").schema();
+        this.f3340 = readerSchema.getField("F334").schema();
+        this.f3350 = readerSchema.getField("F335").schema();
+        this.f3360 = readerSchema.getField("F336").schema();
+        this.f3370 = readerSchema.getField("F337").schema();
+        this.f3380 = readerSchema.getField("F338").schema();
+        this.f3390 = readerSchema.getField("F339").schema();
+        this.f3400 = readerSchema.getField("F340").schema();
+        this.f3410 = readerSchema.getField("F341").schema();
+        this.f3420 = readerSchema.getField("F342").schema();
+        this.f3430 = readerSchema.getField("F343").schema();
+        this.f3440 = readerSchema.getField("F344").schema();
+        this.f3450 = readerSchema.getField("F345").schema();
+        this.f3460 = readerSchema.getField("F346").schema();
+        this.f3470 = readerSchema.getField("F347").schema();
+        this.f3480 = readerSchema.getField("F348").schema();
+        this.f3490 = readerSchema.getField("F349").schema();
+        this.f3500 = readerSchema.getField("F350").schema();
+        this.f3510 = readerSchema.getField("F351").schema();
+        this.f3520 = readerSchema.getField("F352").schema();
+        this.f3530 = readerSchema.getField("F353").schema();
+        this.f3540 = readerSchema.getField("F354").schema();
+        this.f3550 = readerSchema.getField("F355").schema();
+        this.f3560 = readerSchema.getField("F356").schema();
+        this.f3570 = readerSchema.getField("F357").schema();
+        this.f3580 = readerSchema.getField("F358").schema();
+        this.f3590 = readerSchema.getField("F359").schema();
+        this.f3600 = readerSchema.getField("F360").schema();
+        this.f3610 = readerSchema.getField("F361").schema();
+        this.f3620 = readerSchema.getField("F362").schema();
+        this.f3630 = readerSchema.getField("F363").schema();
+        this.f3640 = readerSchema.getField("F364").schema();
+        this.f3650 = readerSchema.getField("F365").schema();
+        this.f3660 = readerSchema.getField("F366").schema();
+        this.f3670 = readerSchema.getField("F367").schema();
+        this.f3680 = readerSchema.getField("F368").schema();
+        this.f3690 = readerSchema.getField("F369").schema();
+        this.f3700 = readerSchema.getField("F370").schema();
+        this.f3710 = readerSchema.getField("F371").schema();
+        this.f3720 = readerSchema.getField("F372").schema();
+        this.f3730 = readerSchema.getField("F373").schema();
+        this.f3740 = readerSchema.getField("F374").schema();
+        this.f3750 = readerSchema.getField("F375").schema();
+        this.f3760 = readerSchema.getField("F376").schema();
+        this.f3770 = readerSchema.getField("F377").schema();
+        this.f3780 = readerSchema.getField("F378").schema();
+        this.f3790 = readerSchema.getField("F379").schema();
+        this.f3800 = readerSchema.getField("F380").schema();
+        this.f3810 = readerSchema.getField("F381").schema();
+        this.f3820 = readerSchema.getField("F382").schema();
+        this.f3830 = readerSchema.getField("F383").schema();
+        this.f3840 = readerSchema.getField("F384").schema();
+        this.f3850 = readerSchema.getField("F385").schema();
+        this.f3860 = readerSchema.getField("F386").schema();
+        this.f3870 = readerSchema.getField("F387").schema();
+        this.f3880 = readerSchema.getField("F388").schema();
+        this.f3890 = readerSchema.getField("F389").schema();
+        this.f3900 = readerSchema.getField("F390").schema();
+        this.f3910 = readerSchema.getField("F391").schema();
+        this.f3920 = readerSchema.getField("F392").schema();
+        this.f3930 = readerSchema.getField("F393").schema();
+        this.f3940 = readerSchema.getField("F394").schema();
+        this.f3950 = readerSchema.getField("F395").schema();
+        this.f3960 = readerSchema.getField("F396").schema();
+        this.f3970 = readerSchema.getField("F397").schema();
+        this.f3980 = readerSchema.getField("F398").schema();
+        this.f3990 = readerSchema.getField("F399").schema();
+        this.f4000 = readerSchema.getField("F400").schema();
+        this.f4010 = readerSchema.getField("F401").schema();
+        this.f4020 = readerSchema.getField("F402").schema();
+        this.f4030 = readerSchema.getField("F403").schema();
+        this.f4040 = readerSchema.getField("F404").schema();
+        this.f4050 = readerSchema.getField("F405").schema();
+        this.f4060 = readerSchema.getField("F406").schema();
+        this.f4070 = readerSchema.getField("F407").schema();
+        this.f4080 = readerSchema.getField("F408").schema();
+        this.f4090 = readerSchema.getField("F409").schema();
+        this.f4100 = readerSchema.getField("F410").schema();
+        this.f4110 = readerSchema.getField("F411").schema();
+        this.f4120 = readerSchema.getField("F412").schema();
+        this.f4130 = readerSchema.getField("F413").schema();
+        this.f4140 = readerSchema.getField("F414").schema();
+        this.f4150 = readerSchema.getField("F415").schema();
+        this.f4160 = readerSchema.getField("F416").schema();
+        this.f4170 = readerSchema.getField("F417").schema();
+        this.f4180 = readerSchema.getField("F418").schema();
+        this.f4190 = readerSchema.getField("F419").schema();
+        this.f4200 = readerSchema.getField("F420").schema();
+        this.f4210 = readerSchema.getField("F421").schema();
+        this.f4220 = readerSchema.getField("F422").schema();
+        this.f4230 = readerSchema.getField("F423").schema();
+        this.f4240 = readerSchema.getField("F424").schema();
+        this.f4250 = readerSchema.getField("F425").schema();
+        this.f4260 = readerSchema.getField("F426").schema();
+        this.f4270 = readerSchema.getField("F427").schema();
+        this.f4280 = readerSchema.getField("F428").schema();
+        this.f4290 = readerSchema.getField("F429").schema();
+        this.f4300 = readerSchema.getField("F430").schema();
+        this.f4310 = readerSchema.getField("F431").schema();
+        this.f4320 = readerSchema.getField("F432").schema();
+        this.f4330 = readerSchema.getField("F433").schema();
+        this.f4340 = readerSchema.getField("F434").schema();
+        this.f4350 = readerSchema.getField("F435").schema();
+        this.f4360 = readerSchema.getField("F436").schema();
+        this.f4370 = readerSchema.getField("F437").schema();
+        this.f4380 = readerSchema.getField("F438").schema();
+        this.f4390 = readerSchema.getField("F439").schema();
+        this.f4400 = readerSchema.getField("F440").schema();
+        this.f4410 = readerSchema.getField("F441").schema();
+        this.f4420 = readerSchema.getField("F442").schema();
+        this.f4430 = readerSchema.getField("F443").schema();
+        this.f4440 = readerSchema.getField("F444").schema();
+        this.f4450 = readerSchema.getField("F445").schema();
+        this.f4460 = readerSchema.getField("F446").schema();
+        this.f4470 = readerSchema.getField("F447").schema();
+        this.f4480 = readerSchema.getField("F448").schema();
+        this.f4490 = readerSchema.getField("F449").schema();
+        this.f4500 = readerSchema.getField("F450").schema();
+        this.f4510 = readerSchema.getField("F451").schema();
+        this.f4520 = readerSchema.getField("F452").schema();
+        this.f4530 = readerSchema.getField("F453").schema();
+        this.f4540 = readerSchema.getField("F454").schema();
+        this.f4550 = readerSchema.getField("F455").schema();
+        this.f4560 = readerSchema.getField("F456").schema();
+        this.f4570 = readerSchema.getField("F457").schema();
+        this.f4580 = readerSchema.getField("F458").schema();
+        this.f4590 = readerSchema.getField("F459").schema();
+        this.f4600 = readerSchema.getField("F460").schema();
+        this.f4610 = readerSchema.getField("F461").schema();
+        this.f4620 = readerSchema.getField("F462").schema();
+        this.f4630 = readerSchema.getField("F463").schema();
+        this.f4640 = readerSchema.getField("F464").schema();
+        this.f4650 = readerSchema.getField("F465").schema();
+        this.f4660 = readerSchema.getField("F466").schema();
+        this.f4670 = readerSchema.getField("F467").schema();
+        this.f4680 = readerSchema.getField("F468").schema();
+        this.f4690 = readerSchema.getField("F469").schema();
+        this.f4700 = readerSchema.getField("F470").schema();
+        this.f4710 = readerSchema.getField("F471").schema();
+        this.f4720 = readerSchema.getField("F472").schema();
+        this.f4730 = readerSchema.getField("F473").schema();
+        this.f4740 = readerSchema.getField("F474").schema();
+        this.f4750 = readerSchema.getField("F475").schema();
+        this.f4760 = readerSchema.getField("F476").schema();
+        this.f4770 = readerSchema.getField("F477").schema();
+        this.f4780 = readerSchema.getField("F478").schema();
+        this.f4790 = readerSchema.getField("F479").schema();
+        this.f4800 = readerSchema.getField("F480").schema();
+        this.f4810 = readerSchema.getField("F481").schema();
+        this.f4820 = readerSchema.getField("F482").schema();
+        this.f4830 = readerSchema.getField("F483").schema();
+        this.f4840 = readerSchema.getField("F484").schema();
+        this.f4850 = readerSchema.getField("F485").schema();
+        this.f4860 = readerSchema.getField("F486").schema();
+        this.f4870 = readerSchema.getField("F487").schema();
+        this.f4880 = readerSchema.getField("F488").schema();
+        this.f4890 = readerSchema.getField("F489").schema();
+        this.f4900 = readerSchema.getField("F490").schema();
+        this.f4910 = readerSchema.getField("F491").schema();
+        this.f4920 = readerSchema.getField("F492").schema();
+        this.f4930 = readerSchema.getField("F493").schema();
+        this.f4940 = readerSchema.getField("F494").schema();
+        this.f4950 = readerSchema.getField("F495").schema();
+        this.f4960 = readerSchema.getField("F496").schema();
+        this.f4970 = readerSchema.getField("F497").schema();
+        this.f4980 = readerSchema.getField("F498").schema();
+        this.f4990 = readerSchema.getField("F499").schema();
+        this.f5000 = readerSchema.getField("F500").schema();
+        this.f5010 = readerSchema.getField("F501").schema();
+        this.f5020 = readerSchema.getField("F502").schema();
+        this.f5030 = readerSchema.getField("F503").schema();
+        this.f5040 = readerSchema.getField("F504").schema();
+        this.f5050 = readerSchema.getField("F505").schema();
+        this.f5060 = readerSchema.getField("F506").schema();
+        this.f5070 = readerSchema.getField("F507").schema();
+        this.f5080 = readerSchema.getField("F508").schema();
+        this.f5090 = readerSchema.getField("F509").schema();
+        this.f5100 = readerSchema.getField("F510").schema();
+        this.f5110 = readerSchema.getField("F511").schema();
+        this.f5120 = readerSchema.getField("F512").schema();
+        this.f5130 = readerSchema.getField("F513").schema();
+        this.f5140 = readerSchema.getField("F514").schema();
+        this.f5150 = readerSchema.getField("F515").schema();
+        this.f5160 = readerSchema.getField("F516").schema();
+        this.f5170 = readerSchema.getField("F517").schema();
+        this.f5180 = readerSchema.getField("F518").schema();
+        this.f5190 = readerSchema.getField("F519").schema();
+        this.f5200 = readerSchema.getField("F520").schema();
+        this.f5210 = readerSchema.getField("F521").schema();
+        this.f5220 = readerSchema.getField("F522").schema();
+        this.f5230 = readerSchema.getField("F523").schema();
+        this.f5240 = readerSchema.getField("F524").schema();
+        this.f5250 = readerSchema.getField("F525").schema();
+        this.f5260 = readerSchema.getField("F526").schema();
+        this.f5270 = readerSchema.getField("F527").schema();
+        this.f5280 = readerSchema.getField("F528").schema();
+        this.f5290 = readerSchema.getField("F529").schema();
+        this.f5300 = readerSchema.getField("F530").schema();
+        this.f5310 = readerSchema.getField("F531").schema();
+        this.f5320 = readerSchema.getField("F532").schema();
+        this.f5330 = readerSchema.getField("F533").schema();
+        this.f5340 = readerSchema.getField("F534").schema();
+        this.f5350 = readerSchema.getField("F535").schema();
+        this.f5360 = readerSchema.getField("F536").schema();
+        this.f5370 = readerSchema.getField("F537").schema();
+        this.f5380 = readerSchema.getField("F538").schema();
+        this.f5390 = readerSchema.getField("F539").schema();
+        this.f5400 = readerSchema.getField("F540").schema();
+        this.f5410 = readerSchema.getField("F541").schema();
+        this.f5420 = readerSchema.getField("F542").schema();
+        this.f5430 = readerSchema.getField("F543").schema();
+        this.f5440 = readerSchema.getField("F544").schema();
+        this.f5450 = readerSchema.getField("F545").schema();
+        this.f5460 = readerSchema.getField("F546").schema();
+        this.f5470 = readerSchema.getField("F547").schema();
+        this.f5480 = readerSchema.getField("F548").schema();
+        this.f5490 = readerSchema.getField("F549").schema();
+        this.f5500 = readerSchema.getField("F550").schema();
+        this.f5510 = readerSchema.getField("F551").schema();
+        this.f5520 = readerSchema.getField("F552").schema();
+        this.f5530 = readerSchema.getField("F553").schema();
+        this.f5540 = readerSchema.getField("F554").schema();
+        this.f5550 = readerSchema.getField("F555").schema();
+        this.f5560 = readerSchema.getField("F556").schema();
+        this.f5570 = readerSchema.getField("F557").schema();
+        this.f5580 = readerSchema.getField("F558").schema();
+        this.f5590 = readerSchema.getField("F559").schema();
+        this.f5600 = readerSchema.getField("F560").schema();
+        this.f5610 = readerSchema.getField("F561").schema();
+        this.f5620 = readerSchema.getField("F562").schema();
+        this.f5630 = readerSchema.getField("F563").schema();
+        this.f5640 = readerSchema.getField("F564").schema();
+        this.f5650 = readerSchema.getField("F565").schema();
+        this.f5660 = readerSchema.getField("F566").schema();
+        this.f5670 = readerSchema.getField("F567").schema();
+        this.f5680 = readerSchema.getField("F568").schema();
+        this.f5690 = readerSchema.getField("F569").schema();
+        this.f5700 = readerSchema.getField("F570").schema();
+        this.f5710 = readerSchema.getField("F571").schema();
+        this.f5720 = readerSchema.getField("F572").schema();
+        this.f5730 = readerSchema.getField("F573").schema();
+        this.f5740 = readerSchema.getField("F574").schema();
+        this.f5750 = readerSchema.getField("F575").schema();
+        this.f5760 = readerSchema.getField("F576").schema();
+        this.f5770 = readerSchema.getField("F577").schema();
+        this.f5780 = readerSchema.getField("F578").schema();
+        this.f5790 = readerSchema.getField("F579").schema();
+        this.f5800 = readerSchema.getField("F580").schema();
+        this.f5810 = readerSchema.getField("F581").schema();
+        this.f5820 = readerSchema.getField("F582").schema();
+        this.f5830 = readerSchema.getField("F583").schema();
+        this.f5840 = readerSchema.getField("F584").schema();
+        this.f5850 = readerSchema.getField("F585").schema();
+        this.f5860 = readerSchema.getField("F586").schema();
+        this.f5870 = readerSchema.getField("F587").schema();
+        this.f5880 = readerSchema.getField("F588").schema();
+        this.f5890 = readerSchema.getField("F589").schema();
+        this.f5900 = readerSchema.getField("F590").schema();
+        this.f5910 = readerSchema.getField("F591").schema();
+        this.f5920 = readerSchema.getField("F592").schema();
+        this.f5930 = readerSchema.getField("F593").schema();
+        this.f5940 = readerSchema.getField("F594").schema();
+        this.f5950 = readerSchema.getField("F595").schema();
+        this.f5960 = readerSchema.getField("F596").schema();
+        this.f5970 = readerSchema.getField("F597").schema();
+        this.f5980 = readerSchema.getField("F598").schema();
+        this.f5990 = readerSchema.getField("F599").schema();
+        this.f6000 = readerSchema.getField("F600").schema();
+        this.f6010 = readerSchema.getField("F601").schema();
+        this.f6020 = readerSchema.getField("F602").schema();
+        this.f6030 = readerSchema.getField("F603").schema();
+        this.f6040 = readerSchema.getField("F604").schema();
+        this.f6050 = readerSchema.getField("F605").schema();
+        this.f6060 = readerSchema.getField("F606").schema();
+        this.f6070 = readerSchema.getField("F607").schema();
+        this.f6080 = readerSchema.getField("F608").schema();
+        this.f6090 = readerSchema.getField("F609").schema();
+        this.f6100 = readerSchema.getField("F610").schema();
+        this.f6110 = readerSchema.getField("F611").schema();
+        this.f6120 = readerSchema.getField("F612").schema();
+        this.f6130 = readerSchema.getField("F613").schema();
+        this.f6140 = readerSchema.getField("F614").schema();
+        this.f6150 = readerSchema.getField("F615").schema();
+        this.f6160 = readerSchema.getField("F616").schema();
+        this.f6170 = readerSchema.getField("F617").schema();
+        this.f6180 = readerSchema.getField("F618").schema();
+        this.f6190 = readerSchema.getField("F619").schema();
+        this.f6200 = readerSchema.getField("F620").schema();
+        this.f6210 = readerSchema.getField("F621").schema();
+        this.f6220 = readerSchema.getField("F622").schema();
+        this.f6230 = readerSchema.getField("F623").schema();
+        this.f6240 = readerSchema.getField("F624").schema();
+        this.f6250 = readerSchema.getField("F625").schema();
+        this.f6260 = readerSchema.getField("F626").schema();
+        this.f6270 = readerSchema.getField("F627").schema();
+        this.f6280 = readerSchema.getField("F628").schema();
+        this.f6290 = readerSchema.getField("F629").schema();
+        this.f6300 = readerSchema.getField("F630").schema();
+        this.f6310 = readerSchema.getField("F631").schema();
+        this.f6320 = readerSchema.getField("F632").schema();
+        this.f6330 = readerSchema.getField("F633").schema();
+        this.f6340 = readerSchema.getField("F634").schema();
+        this.f6350 = readerSchema.getField("F635").schema();
+        this.f6360 = readerSchema.getField("F636").schema();
+        this.f6370 = readerSchema.getField("F637").schema();
+        this.f6380 = readerSchema.getField("F638").schema();
+        this.f6390 = readerSchema.getField("F639").schema();
+        this.f6400 = readerSchema.getField("F640").schema();
+        this.f6410 = readerSchema.getField("F641").schema();
+        this.f6420 = readerSchema.getField("F642").schema();
+        this.f6430 = readerSchema.getField("F643").schema();
+        this.f6440 = readerSchema.getField("F644").schema();
+        this.f6450 = readerSchema.getField("F645").schema();
+        this.f6460 = readerSchema.getField("F646").schema();
+        this.f6470 = readerSchema.getField("F647").schema();
+        this.f6480 = readerSchema.getField("F648").schema();
+        this.f6490 = readerSchema.getField("F649").schema();
+        this.f6500 = readerSchema.getField("F650").schema();
+        this.f6510 = readerSchema.getField("F651").schema();
+        this.f6520 = readerSchema.getField("F652").schema();
+        this.f6530 = readerSchema.getField("F653").schema();
+        this.f6540 = readerSchema.getField("F654").schema();
+        this.f6550 = readerSchema.getField("F655").schema();
+        this.f6560 = readerSchema.getField("F656").schema();
+        this.f6570 = readerSchema.getField("F657").schema();
+        this.f6580 = readerSchema.getField("F658").schema();
+        this.f6590 = readerSchema.getField("F659").schema();
+        this.f6600 = readerSchema.getField("F660").schema();
+        this.f6610 = readerSchema.getField("F661").schema();
+        this.f6620 = readerSchema.getField("F662").schema();
+        this.f6630 = readerSchema.getField("F663").schema();
+        this.f6640 = readerSchema.getField("F664").schema();
+        this.f6650 = readerSchema.getField("F665").schema();
+        this.f6660 = readerSchema.getField("F666").schema();
+        this.f6670 = readerSchema.getField("F667").schema();
+        this.f6680 = readerSchema.getField("F668").schema();
+        this.f6690 = readerSchema.getField("F669").schema();
+        this.f6700 = readerSchema.getField("F670").schema();
+        this.f6710 = readerSchema.getField("F671").schema();
+        this.f6720 = readerSchema.getField("F672").schema();
+        this.f6730 = readerSchema.getField("F673").schema();
+        this.f6740 = readerSchema.getField("F674").schema();
+        this.f6750 = readerSchema.getField("F675").schema();
+        this.f6760 = readerSchema.getField("F676").schema();
+        this.f6770 = readerSchema.getField("F677").schema();
+        this.f6780 = readerSchema.getField("F678").schema();
+        this.f6790 = readerSchema.getField("F679").schema();
+        this.f6800 = readerSchema.getField("F680").schema();
+        this.f6810 = readerSchema.getField("F681").schema();
+        this.f6820 = readerSchema.getField("F682").schema();
+        this.f6830 = readerSchema.getField("F683").schema();
+        this.f6840 = readerSchema.getField("F684").schema();
+        this.f6850 = readerSchema.getField("F685").schema();
+        this.f6860 = readerSchema.getField("F686").schema();
+        this.f6870 = readerSchema.getField("F687").schema();
+        this.f6880 = readerSchema.getField("F688").schema();
+        this.f6890 = readerSchema.getField("F689").schema();
+        this.f6900 = readerSchema.getField("F690").schema();
+        this.f6910 = readerSchema.getField("F691").schema();
+        this.f6920 = readerSchema.getField("F692").schema();
+        this.f6930 = readerSchema.getField("F693").schema();
+        this.f6940 = readerSchema.getField("F694").schema();
+        this.f6950 = readerSchema.getField("F695").schema();
+        this.f6960 = readerSchema.getField("F696").schema();
+        this.f6970 = readerSchema.getField("F697").schema();
+        this.f6980 = readerSchema.getField("F698").schema();
+        this.f6990 = readerSchema.getField("F699").schema();
+        this.f7000 = readerSchema.getField("F700").schema();
+        this.f7010 = readerSchema.getField("F701").schema();
+        this.f7020 = readerSchema.getField("F702").schema();
+        this.f7030 = readerSchema.getField("F703").schema();
+        this.f7040 = readerSchema.getField("F704").schema();
+        this.f7050 = readerSchema.getField("F705").schema();
+        this.f7060 = readerSchema.getField("F706").schema();
+        this.f7070 = readerSchema.getField("F707").schema();
+        this.f7080 = readerSchema.getField("F708").schema();
+        this.f7090 = readerSchema.getField("F709").schema();
+        this.f7100 = readerSchema.getField("F710").schema();
+        this.f7110 = readerSchema.getField("F711").schema();
+        this.f7120 = readerSchema.getField("F712").schema();
+        this.f7130 = readerSchema.getField("F713").schema();
+        this.f7140 = readerSchema.getField("F714").schema();
+        this.f7150 = readerSchema.getField("F715").schema();
+        this.f7160 = readerSchema.getField("F716").schema();
+        this.f7170 = readerSchema.getField("F717").schema();
+        this.f7180 = readerSchema.getField("F718").schema();
+        this.f7190 = readerSchema.getField("F719").schema();
+        this.f7200 = readerSchema.getField("F720").schema();
+        this.f7210 = readerSchema.getField("F721").schema();
+        this.f7220 = readerSchema.getField("F722").schema();
+        this.f7230 = readerSchema.getField("F723").schema();
+        this.f7240 = readerSchema.getField("F724").schema();
+        this.f7250 = readerSchema.getField("F725").schema();
+        this.f7260 = readerSchema.getField("F726").schema();
+        this.f7270 = readerSchema.getField("F727").schema();
+        this.f7280 = readerSchema.getField("F728").schema();
+        this.f7290 = readerSchema.getField("F729").schema();
+        this.f7300 = readerSchema.getField("F730").schema();
+        this.f7310 = readerSchema.getField("F731").schema();
+        this.f7320 = readerSchema.getField("F732").schema();
+        this.f7330 = readerSchema.getField("F733").schema();
+        this.f7340 = readerSchema.getField("F734").schema();
+        this.f7350 = readerSchema.getField("F735").schema();
+        this.f7360 = readerSchema.getField("F736").schema();
+        this.f7370 = readerSchema.getField("F737").schema();
+        this.f7380 = readerSchema.getField("F738").schema();
+        this.f7390 = readerSchema.getField("F739").schema();
+        this.f7400 = readerSchema.getField("F740").schema();
+        this.f7410 = readerSchema.getField("F741").schema();
+        this.f7420 = readerSchema.getField("F742").schema();
+        this.f7430 = readerSchema.getField("F743").schema();
+        this.f7440 = readerSchema.getField("F744").schema();
+        this.f7450 = readerSchema.getField("F745").schema();
+        this.f7460 = readerSchema.getField("F746").schema();
+        this.f7470 = readerSchema.getField("F747").schema();
+        this.f7480 = readerSchema.getField("F748").schema();
+        this.f7490 = readerSchema.getField("F749").schema();
+        this.f7500 = readerSchema.getField("F750").schema();
+        this.f7510 = readerSchema.getField("F751").schema();
+        this.f7520 = readerSchema.getField("F752").schema();
+        this.f7530 = readerSchema.getField("F753").schema();
+        this.f7540 = readerSchema.getField("F754").schema();
+        this.f7550 = readerSchema.getField("F755").schema();
+        this.f7560 = readerSchema.getField("F756").schema();
+        this.f7570 = readerSchema.getField("F757").schema();
+        this.f7580 = readerSchema.getField("F758").schema();
+        this.f7590 = readerSchema.getField("F759").schema();
+        this.f7600 = readerSchema.getField("F760").schema();
+        this.f7610 = readerSchema.getField("F761").schema();
+        this.f7620 = readerSchema.getField("F762").schema();
+        this.f7630 = readerSchema.getField("F763").schema();
+        this.f7640 = readerSchema.getField("F764").schema();
+        this.f7650 = readerSchema.getField("F765").schema();
+        this.f7660 = readerSchema.getField("F766").schema();
+        this.f7670 = readerSchema.getField("F767").schema();
+        this.f7680 = readerSchema.getField("F768").schema();
+        this.f7690 = readerSchema.getField("F769").schema();
+        this.f7700 = readerSchema.getField("F770").schema();
+        this.f7710 = readerSchema.getField("F771").schema();
+        this.f7720 = readerSchema.getField("F772").schema();
+        this.f7730 = readerSchema.getField("F773").schema();
+        this.f7740 = readerSchema.getField("F774").schema();
+        this.f7750 = readerSchema.getField("F775").schema();
+        this.f7760 = readerSchema.getField("F776").schema();
+        this.f7770 = readerSchema.getField("F777").schema();
+        this.f7780 = readerSchema.getField("F778").schema();
+        this.f7790 = readerSchema.getField("F779").schema();
+        this.f7800 = readerSchema.getField("F780").schema();
+        this.f7810 = readerSchema.getField("F781").schema();
+        this.f7820 = readerSchema.getField("F782").schema();
+        this.f7830 = readerSchema.getField("F783").schema();
+        this.f7840 = readerSchema.getField("F784").schema();
+        this.f7850 = readerSchema.getField("F785").schema();
+        this.f7860 = readerSchema.getField("F786").schema();
+        this.f7870 = readerSchema.getField("F787").schema();
+        this.f7880 = readerSchema.getField("F788").schema();
+        this.f7890 = readerSchema.getField("F789").schema();
+        this.f7900 = readerSchema.getField("F790").schema();
+        this.f7910 = readerSchema.getField("F791").schema();
+        this.f7920 = readerSchema.getField("F792").schema();
+        this.f7930 = readerSchema.getField("F793").schema();
+        this.f7940 = readerSchema.getField("F794").schema();
+        this.f7950 = readerSchema.getField("F795").schema();
+        this.f7960 = readerSchema.getField("F796").schema();
+        this.f7970 = readerSchema.getField("F797").schema();
+        this.f7980 = readerSchema.getField("F798").schema();
+        this.f7990 = readerSchema.getField("F799").schema();
+        this.f8000 = readerSchema.getField("F800").schema();
+        this.f8010 = readerSchema.getField("F801").schema();
+        this.f8020 = readerSchema.getField("F802").schema();
+        this.f8030 = readerSchema.getField("F803").schema();
+        this.f8040 = readerSchema.getField("F804").schema();
+        this.f8050 = readerSchema.getField("F805").schema();
+        this.f8060 = readerSchema.getField("F806").schema();
+        this.f8070 = readerSchema.getField("F807").schema();
+        this.f8080 = readerSchema.getField("F808").schema();
+        this.f8090 = readerSchema.getField("F809").schema();
+        this.f8100 = readerSchema.getField("F810").schema();
+        this.f8110 = readerSchema.getField("F811").schema();
+        this.f8120 = readerSchema.getField("F812").schema();
+        this.f8130 = readerSchema.getField("F813").schema();
+        this.f8140 = readerSchema.getField("F814").schema();
+        this.f8150 = readerSchema.getField("F815").schema();
+        this.f8160 = readerSchema.getField("F816").schema();
+        this.f8170 = readerSchema.getField("F817").schema();
+        this.f8180 = readerSchema.getField("F818").schema();
+        this.f8190 = readerSchema.getField("F819").schema();
+        this.f8200 = readerSchema.getField("F820").schema();
+        this.f8210 = readerSchema.getField("F821").schema();
+        this.f8220 = readerSchema.getField("F822").schema();
+        this.f8230 = readerSchema.getField("F823").schema();
+        this.f8240 = readerSchema.getField("F824").schema();
+        this.f8250 = readerSchema.getField("F825").schema();
+        this.f8260 = readerSchema.getField("F826").schema();
+        this.f8270 = readerSchema.getField("F827").schema();
+        this.f8280 = readerSchema.getField("F828").schema();
+        this.f8290 = readerSchema.getField("F829").schema();
+        this.f8300 = readerSchema.getField("F830").schema();
+        this.f8310 = readerSchema.getField("F831").schema();
+        this.f8320 = readerSchema.getField("F832").schema();
+        this.f8330 = readerSchema.getField("F833").schema();
+        this.f8340 = readerSchema.getField("F834").schema();
+        this.f8350 = readerSchema.getField("F835").schema();
+        this.f8360 = readerSchema.getField("F836").schema();
+        this.f8370 = readerSchema.getField("F837").schema();
+        this.f8380 = readerSchema.getField("F838").schema();
+        this.f8390 = readerSchema.getField("F839").schema();
+        this.f8400 = readerSchema.getField("F840").schema();
+        this.f8410 = readerSchema.getField("F841").schema();
+        this.f8420 = readerSchema.getField("F842").schema();
+        this.f8430 = readerSchema.getField("F843").schema();
+        this.f8440 = readerSchema.getField("F844").schema();
+        this.f8450 = readerSchema.getField("F845").schema();
+        this.f8460 = readerSchema.getField("F846").schema();
+        this.f8470 = readerSchema.getField("F847").schema();
+        this.f8480 = readerSchema.getField("F848").schema();
+        this.f8490 = readerSchema.getField("F849").schema();
+        this.f8500 = readerSchema.getField("F850").schema();
+        this.f8510 = readerSchema.getField("F851").schema();
+        this.f8520 = readerSchema.getField("F852").schema();
+        this.f8530 = readerSchema.getField("F853").schema();
+        this.f8540 = readerSchema.getField("F854").schema();
+        this.f8550 = readerSchema.getField("F855").schema();
+        this.f8560 = readerSchema.getField("F856").schema();
+        this.f8570 = readerSchema.getField("F857").schema();
+        this.f8580 = readerSchema.getField("F858").schema();
+        this.f8590 = readerSchema.getField("F859").schema();
+        this.f8600 = readerSchema.getField("F860").schema();
+        this.f8610 = readerSchema.getField("F861").schema();
+        this.f8620 = readerSchema.getField("F862").schema();
+        this.f8630 = readerSchema.getField("F863").schema();
+        this.f8640 = readerSchema.getField("F864").schema();
+        this.f8650 = readerSchema.getField("F865").schema();
+        this.f8660 = readerSchema.getField("F866").schema();
+        this.f8670 = readerSchema.getField("F867").schema();
+        this.f8680 = readerSchema.getField("F868").schema();
+        this.f8690 = readerSchema.getField("F869").schema();
+        this.f8700 = readerSchema.getField("F870").schema();
+        this.f8710 = readerSchema.getField("F871").schema();
+        this.f8720 = readerSchema.getField("F872").schema();
+        this.f8730 = readerSchema.getField("F873").schema();
+        this.f8740 = readerSchema.getField("F874").schema();
+        this.f8750 = readerSchema.getField("F875").schema();
+        this.f8760 = readerSchema.getField("F876").schema();
+        this.f8770 = readerSchema.getField("F877").schema();
+        this.f8780 = readerSchema.getField("F878").schema();
+        this.f8790 = readerSchema.getField("F879").schema();
+        this.f8800 = readerSchema.getField("F880").schema();
+        this.f8810 = readerSchema.getField("F881").schema();
+        this.f8820 = readerSchema.getField("F882").schema();
+        this.f8830 = readerSchema.getField("F883").schema();
+        this.f8840 = readerSchema.getField("F884").schema();
+        this.f8850 = readerSchema.getField("F885").schema();
+        this.f8860 = readerSchema.getField("F886").schema();
+        this.f8870 = readerSchema.getField("F887").schema();
+        this.f8880 = readerSchema.getField("F888").schema();
+        this.f8890 = readerSchema.getField("F889").schema();
+        this.f8900 = readerSchema.getField("F890").schema();
+        this.f8910 = readerSchema.getField("F891").schema();
+        this.f8920 = readerSchema.getField("F892").schema();
+        this.f8930 = readerSchema.getField("F893").schema();
+        this.f8940 = readerSchema.getField("F894").schema();
+        this.f8950 = readerSchema.getField("F895").schema();
+        this.f8960 = readerSchema.getField("F896").schema();
+        this.f8970 = readerSchema.getField("F897").schema();
+        this.f8980 = readerSchema.getField("F898").schema();
+        this.f8990 = readerSchema.getField("F899").schema();
+        this.f9000 = readerSchema.getField("F900").schema();
+        this.f9010 = readerSchema.getField("F901").schema();
+        this.f9020 = readerSchema.getField("F902").schema();
+        this.f9030 = readerSchema.getField("F903").schema();
+        this.f9040 = readerSchema.getField("F904").schema();
+        this.f9050 = readerSchema.getField("F905").schema();
+        this.f9060 = readerSchema.getField("F906").schema();
+        this.f9070 = readerSchema.getField("F907").schema();
+        this.f9080 = readerSchema.getField("F908").schema();
+        this.f9090 = readerSchema.getField("F909").schema();
+        this.f9100 = readerSchema.getField("F910").schema();
+        this.f9110 = readerSchema.getField("F911").schema();
+        this.f9120 = readerSchema.getField("F912").schema();
+        this.f9130 = readerSchema.getField("F913").schema();
+        this.f9140 = readerSchema.getField("F914").schema();
+        this.f9150 = readerSchema.getField("F915").schema();
+        this.f9160 = readerSchema.getField("F916").schema();
+        this.f9170 = readerSchema.getField("F917").schema();
+        this.f9180 = readerSchema.getField("F918").schema();
+        this.f9190 = readerSchema.getField("F919").schema();
+        this.f9200 = readerSchema.getField("F920").schema();
+        this.f9210 = readerSchema.getField("F921").schema();
+        this.f9220 = readerSchema.getField("F922").schema();
+        this.f9230 = readerSchema.getField("F923").schema();
+        this.f9240 = readerSchema.getField("F924").schema();
+        this.f9250 = readerSchema.getField("F925").schema();
+        this.f9260 = readerSchema.getField("F926").schema();
+        this.f9270 = readerSchema.getField("F927").schema();
+        this.f9280 = readerSchema.getField("F928").schema();
+        this.f9290 = readerSchema.getField("F929").schema();
+        this.f9300 = readerSchema.getField("F930").schema();
+        this.f9310 = readerSchema.getField("F931").schema();
+        this.f9320 = readerSchema.getField("F932").schema();
+        this.f9330 = readerSchema.getField("F933").schema();
+        this.f9340 = readerSchema.getField("F934").schema();
+        this.f9350 = readerSchema.getField("F935").schema();
+        this.f9360 = readerSchema.getField("F936").schema();
+        this.f9370 = readerSchema.getField("F937").schema();
+        this.f9380 = readerSchema.getField("F938").schema();
+        this.f9390 = readerSchema.getField("F939").schema();
+        this.f9400 = readerSchema.getField("F940").schema();
+        this.f9410 = readerSchema.getField("F941").schema();
+        this.f9420 = readerSchema.getField("F942").schema();
+        this.f9430 = readerSchema.getField("F943").schema();
+        this.f9440 = readerSchema.getField("F944").schema();
+        this.f9450 = readerSchema.getField("F945").schema();
+        this.f9460 = readerSchema.getField("F946").schema();
+        this.f9470 = readerSchema.getField("F947").schema();
+        this.f9480 = readerSchema.getField("F948").schema();
+        this.f9490 = readerSchema.getField("F949").schema();
+        this.f9500 = readerSchema.getField("F950").schema();
+        this.f9510 = readerSchema.getField("F951").schema();
+        this.f9520 = readerSchema.getField("F952").schema();
+        this.f9530 = readerSchema.getField("F953").schema();
+        this.f9540 = readerSchema.getField("F954").schema();
+        this.f9550 = readerSchema.getField("F955").schema();
+        this.f9560 = readerSchema.getField("F956").schema();
+        this.f9570 = readerSchema.getField("F957").schema();
+        this.f9580 = readerSchema.getField("F958").schema();
+        this.f9590 = readerSchema.getField("F959").schema();
+        this.f9600 = readerSchema.getField("F960").schema();
+        this.f9610 = readerSchema.getField("F961").schema();
+        this.f9620 = readerSchema.getField("F962").schema();
+        this.f9630 = readerSchema.getField("F963").schema();
+        this.f9640 = readerSchema.getField("F964").schema();
+        this.f9650 = readerSchema.getField("F965").schema();
+        this.f9660 = readerSchema.getField("F966").schema();
+        this.f9670 = readerSchema.getField("F967").schema();
+        this.f9680 = readerSchema.getField("F968").schema();
+        this.f9690 = readerSchema.getField("F969").schema();
+        this.f9700 = readerSchema.getField("F970").schema();
+        this.f9710 = readerSchema.getField("F971").schema();
+        this.f9720 = readerSchema.getField("F972").schema();
+        this.f9730 = readerSchema.getField("F973").schema();
+        this.f9740 = readerSchema.getField("F974").schema();
+        this.f9750 = readerSchema.getField("F975").schema();
+        this.f9760 = readerSchema.getField("F976").schema();
+        this.f9770 = readerSchema.getField("F977").schema();
+        this.f9780 = readerSchema.getField("F978").schema();
+        this.f9790 = readerSchema.getField("F979").schema();
+        this.f9800 = readerSchema.getField("F980").schema();
+        this.f9810 = readerSchema.getField("F981").schema();
+        this.f9820 = readerSchema.getField("F982").schema();
+        this.f9830 = readerSchema.getField("F983").schema();
+        this.f9840 = readerSchema.getField("F984").schema();
+        this.f9850 = readerSchema.getField("F985").schema();
+        this.f9860 = readerSchema.getField("F986").schema();
+        this.f9870 = readerSchema.getField("F987").schema();
+        this.f9880 = readerSchema.getField("F988").schema();
+        this.f9890 = readerSchema.getField("F989").schema();
+        this.f9900 = readerSchema.getField("F990").schema();
+        this.f9910 = readerSchema.getField("F991").schema();
+        this.f9920 = readerSchema.getField("F992").schema();
+        this.f9930 = readerSchema.getField("F993").schema();
+        this.f9940 = readerSchema.getField("F994").schema();
+        this.f9950 = readerSchema.getField("F995").schema();
+        this.f9960 = readerSchema.getField("F996").schema();
+        this.f9970 = readerSchema.getField("F997").schema();
+        this.f9980 = readerSchema.getField("F998").schema();
+        this.f9990 = readerSchema.getField("F999").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F0': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F1': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(2);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(3);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F3': "+ unionIndex3));
+            }
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence4;
+                Object oldString4 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(4);
+                if (oldString4 instanceof Utf8) {
+                    charSequence4 = (decoder).readString(((Utf8) oldString4));
+                } else {
+                    charSequence4 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, charSequence4);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F4': "+ unionIndex4));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Utf8 charSequence5;
+                Object oldString5 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(5);
+                if (oldString5 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) oldString5));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, charSequence5);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F5': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence6;
+                Object oldString6 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(6);
+                if (oldString6 instanceof Utf8) {
+                    charSequence6 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence6 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, charSequence6);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F6': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence7;
+                Object oldString7 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(7);
+                if (oldString7 instanceof Utf8) {
+                    charSequence7 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence7 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, charSequence7);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F7': "+ unionIndex7));
+            }
+        }
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, null);
+        } else {
+            if (unionIndex8 == 1) {
+                Utf8 charSequence8;
+                Object oldString8 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(8);
+                if (oldString8 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString8));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, charSequence8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F8': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, null);
+        } else {
+            if (unionIndex9 == 1) {
+                Utf8 charSequence9;
+                Object oldString9 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(9);
+                if (oldString9 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString9));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F9': "+ unionIndex9));
+            }
+        }
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, null);
+        } else {
+            if (unionIndex10 == 1) {
+                Utf8 charSequence10;
+                Object oldString10 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(10);
+                if (oldString10 instanceof Utf8) {
+                    charSequence10 = (decoder).readString(((Utf8) oldString10));
+                } else {
+                    charSequence10 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, charSequence10);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F10': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, null);
+        } else {
+            if (unionIndex11 == 1) {
+                Utf8 charSequence11;
+                Object oldString11 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(11);
+                if (oldString11 instanceof Utf8) {
+                    charSequence11 = (decoder).readString(((Utf8) oldString11));
+                } else {
+                    charSequence11 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, charSequence11);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F11': "+ unionIndex11));
+            }
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence12;
+                Object oldString12 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(12);
+                if (oldString12 instanceof Utf8) {
+                    charSequence12 = (decoder).readString(((Utf8) oldString12));
+                } else {
+                    charSequence12 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, charSequence12);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F12': "+ unionIndex12));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence13;
+                Object oldString13 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(13);
+                if (oldString13 instanceof Utf8) {
+                    charSequence13 = (decoder).readString(((Utf8) oldString13));
+                } else {
+                    charSequence13 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, charSequence13);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F13': "+ unionIndex13));
+            }
+        }
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence14;
+                Object oldString14 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(14);
+                if (oldString14 instanceof Utf8) {
+                    charSequence14 = (decoder).readString(((Utf8) oldString14));
+                } else {
+                    charSequence14 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, charSequence14);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F14': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence15;
+                Object oldString15 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(15);
+                if (oldString15 instanceof Utf8) {
+                    charSequence15 = (decoder).readString(((Utf8) oldString15));
+                } else {
+                    charSequence15 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, charSequence15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F15': "+ unionIndex15));
+            }
+        }
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Utf8 charSequence16;
+                Object oldString16 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(16);
+                if (oldString16 instanceof Utf8) {
+                    charSequence16 = (decoder).readString(((Utf8) oldString16));
+                } else {
+                    charSequence16 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, charSequence16);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F16': "+ unionIndex16));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Utf8 charSequence17;
+                Object oldString17 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(17);
+                if (oldString17 instanceof Utf8) {
+                    charSequence17 = (decoder).readString(((Utf8) oldString17));
+                } else {
+                    charSequence17 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, charSequence17);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F17': "+ unionIndex17));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Utf8 charSequence18;
+                Object oldString18 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(18);
+                if (oldString18 instanceof Utf8) {
+                    charSequence18 = (decoder).readString(((Utf8) oldString18));
+                } else {
+                    charSequence18 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, charSequence18);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F18': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex19 = (decoder.readIndex());
+        if (unionIndex19 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, null);
+        } else {
+            if (unionIndex19 == 1) {
+                Utf8 charSequence19;
+                Object oldString19 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(19);
+                if (oldString19 instanceof Utf8) {
+                    charSequence19 = (decoder).readString(((Utf8) oldString19));
+                } else {
+                    charSequence19 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, charSequence19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F19': "+ unionIndex19));
+            }
+        }
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, null);
+        } else {
+            if (unionIndex20 == 1) {
+                Utf8 charSequence20;
+                Object oldString20 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(20);
+                if (oldString20 instanceof Utf8) {
+                    charSequence20 = (decoder).readString(((Utf8) oldString20));
+                } else {
+                    charSequence20 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, charSequence20);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F20': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, null);
+        } else {
+            if (unionIndex21 == 1) {
+                Utf8 charSequence21;
+                Object oldString21 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(21);
+                if (oldString21 instanceof Utf8) {
+                    charSequence21 = (decoder).readString(((Utf8) oldString21));
+                } else {
+                    charSequence21 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, charSequence21);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F21': "+ unionIndex21));
+            }
+        }
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Utf8 charSequence22;
+                Object oldString22 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(22);
+                if (oldString22 instanceof Utf8) {
+                    charSequence22 = (decoder).readString(((Utf8) oldString22));
+                } else {
+                    charSequence22 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, charSequence22);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F22': "+ unionIndex22));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Utf8 charSequence23;
+                Object oldString23 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(23);
+                if (oldString23 instanceof Utf8) {
+                    charSequence23 = (decoder).readString(((Utf8) oldString23));
+                } else {
+                    charSequence23 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, charSequence23);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F23': "+ unionIndex23));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Utf8 charSequence24;
+                Object oldString24 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(24);
+                if (oldString24 instanceof Utf8) {
+                    charSequence24 = (decoder).readString(((Utf8) oldString24));
+                } else {
+                    charSequence24 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, charSequence24);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F24': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, null);
+        } else {
+            if (unionIndex25 == 1) {
+                Utf8 charSequence25;
+                Object oldString25 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(25);
+                if (oldString25 instanceof Utf8) {
+                    charSequence25 = (decoder).readString(((Utf8) oldString25));
+                } else {
+                    charSequence25 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, charSequence25);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F25': "+ unionIndex25));
+            }
+        }
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, null);
+        } else {
+            if (unionIndex26 == 1) {
+                Utf8 charSequence26;
+                Object oldString26 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(26);
+                if (oldString26 instanceof Utf8) {
+                    charSequence26 = (decoder).readString(((Utf8) oldString26));
+                } else {
+                    charSequence26 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, charSequence26);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F26': "+ unionIndex26));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex27 = (decoder.readIndex());
+        if (unionIndex27 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, null);
+        } else {
+            if (unionIndex27 == 1) {
+                Utf8 charSequence27;
+                Object oldString27 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(27);
+                if (oldString27 instanceof Utf8) {
+                    charSequence27 = (decoder).readString(((Utf8) oldString27));
+                } else {
+                    charSequence27 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, charSequence27);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F27': "+ unionIndex27));
+            }
+        }
+        int unionIndex28 = (decoder.readIndex());
+        if (unionIndex28 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, null);
+        } else {
+            if (unionIndex28 == 1) {
+                Utf8 charSequence28;
+                Object oldString28 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(28);
+                if (oldString28 instanceof Utf8) {
+                    charSequence28 = (decoder).readString(((Utf8) oldString28));
+                } else {
+                    charSequence28 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, charSequence28);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F28': "+ unionIndex28));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex29 = (decoder.readIndex());
+        if (unionIndex29 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, null);
+        } else {
+            if (unionIndex29 == 1) {
+                Utf8 charSequence29;
+                Object oldString29 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(29);
+                if (oldString29 instanceof Utf8) {
+                    charSequence29 = (decoder).readString(((Utf8) oldString29));
+                } else {
+                    charSequence29 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, charSequence29);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F29': "+ unionIndex29));
+            }
+        }
+        int unionIndex30 = (decoder.readIndex());
+        if (unionIndex30 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, null);
+        } else {
+            if (unionIndex30 == 1) {
+                Utf8 charSequence30;
+                Object oldString30 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(30);
+                if (oldString30 instanceof Utf8) {
+                    charSequence30 = (decoder).readString(((Utf8) oldString30));
+                } else {
+                    charSequence30 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, charSequence30);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F30': "+ unionIndex30));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex31 = (decoder.readIndex());
+        if (unionIndex31 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, null);
+        } else {
+            if (unionIndex31 == 1) {
+                Utf8 charSequence31;
+                Object oldString31 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(31);
+                if (oldString31 instanceof Utf8) {
+                    charSequence31 = (decoder).readString(((Utf8) oldString31));
+                } else {
+                    charSequence31 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, charSequence31);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F31': "+ unionIndex31));
+            }
+        }
+        int unionIndex32 = (decoder.readIndex());
+        if (unionIndex32 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, null);
+        } else {
+            if (unionIndex32 == 1) {
+                Utf8 charSequence32;
+                Object oldString32 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(32);
+                if (oldString32 instanceof Utf8) {
+                    charSequence32 = (decoder).readString(((Utf8) oldString32));
+                } else {
+                    charSequence32 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, charSequence32);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F32': "+ unionIndex32));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex33 = (decoder.readIndex());
+        if (unionIndex33 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, null);
+        } else {
+            if (unionIndex33 == 1) {
+                Utf8 charSequence33;
+                Object oldString33 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(33);
+                if (oldString33 instanceof Utf8) {
+                    charSequence33 = (decoder).readString(((Utf8) oldString33));
+                } else {
+                    charSequence33 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, charSequence33);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F33': "+ unionIndex33));
+            }
+        }
+        int unionIndex34 = (decoder.readIndex());
+        if (unionIndex34 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, null);
+        } else {
+            if (unionIndex34 == 1) {
+                Utf8 charSequence34;
+                Object oldString34 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(34);
+                if (oldString34 instanceof Utf8) {
+                    charSequence34 = (decoder).readString(((Utf8) oldString34));
+                } else {
+                    charSequence34 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, charSequence34);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F34': "+ unionIndex34));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex35 = (decoder.readIndex());
+        if (unionIndex35 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, null);
+        } else {
+            if (unionIndex35 == 1) {
+                Utf8 charSequence35;
+                Object oldString35 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(35);
+                if (oldString35 instanceof Utf8) {
+                    charSequence35 = (decoder).readString(((Utf8) oldString35));
+                } else {
+                    charSequence35 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, charSequence35);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F35': "+ unionIndex35));
+            }
+        }
+        int unionIndex36 = (decoder.readIndex());
+        if (unionIndex36 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, null);
+        } else {
+            if (unionIndex36 == 1) {
+                Utf8 charSequence36;
+                Object oldString36 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(36);
+                if (oldString36 instanceof Utf8) {
+                    charSequence36 = (decoder).readString(((Utf8) oldString36));
+                } else {
+                    charSequence36 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, charSequence36);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F36': "+ unionIndex36));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex37 = (decoder.readIndex());
+        if (unionIndex37 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, null);
+        } else {
+            if (unionIndex37 == 1) {
+                Utf8 charSequence37;
+                Object oldString37 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(37);
+                if (oldString37 instanceof Utf8) {
+                    charSequence37 = (decoder).readString(((Utf8) oldString37));
+                } else {
+                    charSequence37 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, charSequence37);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F37': "+ unionIndex37));
+            }
+        }
+        int unionIndex38 = (decoder.readIndex());
+        if (unionIndex38 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, null);
+        } else {
+            if (unionIndex38 == 1) {
+                Utf8 charSequence38;
+                Object oldString38 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(38);
+                if (oldString38 instanceof Utf8) {
+                    charSequence38 = (decoder).readString(((Utf8) oldString38));
+                } else {
+                    charSequence38 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, charSequence38);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F38': "+ unionIndex38));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex39 = (decoder.readIndex());
+        if (unionIndex39 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, null);
+        } else {
+            if (unionIndex39 == 1) {
+                Utf8 charSequence39;
+                Object oldString39 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(39);
+                if (oldString39 instanceof Utf8) {
+                    charSequence39 = (decoder).readString(((Utf8) oldString39));
+                } else {
+                    charSequence39 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, charSequence39);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F39': "+ unionIndex39));
+            }
+        }
+        int unionIndex40 = (decoder.readIndex());
+        if (unionIndex40 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, null);
+        } else {
+            if (unionIndex40 == 1) {
+                Utf8 charSequence40;
+                Object oldString40 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(40);
+                if (oldString40 instanceof Utf8) {
+                    charSequence40 = (decoder).readString(((Utf8) oldString40));
+                } else {
+                    charSequence40 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, charSequence40);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F40': "+ unionIndex40));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex41 = (decoder.readIndex());
+        if (unionIndex41 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, null);
+        } else {
+            if (unionIndex41 == 1) {
+                Utf8 charSequence41;
+                Object oldString41 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(41);
+                if (oldString41 instanceof Utf8) {
+                    charSequence41 = (decoder).readString(((Utf8) oldString41));
+                } else {
+                    charSequence41 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, charSequence41);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F41': "+ unionIndex41));
+            }
+        }
+        int unionIndex42 = (decoder.readIndex());
+        if (unionIndex42 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, null);
+        } else {
+            if (unionIndex42 == 1) {
+                Utf8 charSequence42;
+                Object oldString42 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(42);
+                if (oldString42 instanceof Utf8) {
+                    charSequence42 = (decoder).readString(((Utf8) oldString42));
+                } else {
+                    charSequence42 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, charSequence42);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F42': "+ unionIndex42));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex43 = (decoder.readIndex());
+        if (unionIndex43 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, null);
+        } else {
+            if (unionIndex43 == 1) {
+                Utf8 charSequence43;
+                Object oldString43 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(43);
+                if (oldString43 instanceof Utf8) {
+                    charSequence43 = (decoder).readString(((Utf8) oldString43));
+                } else {
+                    charSequence43 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, charSequence43);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F43': "+ unionIndex43));
+            }
+        }
+        int unionIndex44 = (decoder.readIndex());
+        if (unionIndex44 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, null);
+        } else {
+            if (unionIndex44 == 1) {
+                Utf8 charSequence44;
+                Object oldString44 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(44);
+                if (oldString44 instanceof Utf8) {
+                    charSequence44 = (decoder).readString(((Utf8) oldString44));
+                } else {
+                    charSequence44 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, charSequence44);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F44': "+ unionIndex44));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex45 = (decoder.readIndex());
+        if (unionIndex45 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, null);
+        } else {
+            if (unionIndex45 == 1) {
+                Utf8 charSequence45;
+                Object oldString45 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(45);
+                if (oldString45 instanceof Utf8) {
+                    charSequence45 = (decoder).readString(((Utf8) oldString45));
+                } else {
+                    charSequence45 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, charSequence45);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F45': "+ unionIndex45));
+            }
+        }
+        int unionIndex46 = (decoder.readIndex());
+        if (unionIndex46 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, null);
+        } else {
+            if (unionIndex46 == 1) {
+                Utf8 charSequence46;
+                Object oldString46 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(46);
+                if (oldString46 instanceof Utf8) {
+                    charSequence46 = (decoder).readString(((Utf8) oldString46));
+                } else {
+                    charSequence46 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, charSequence46);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F46': "+ unionIndex46));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex47 = (decoder.readIndex());
+        if (unionIndex47 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, null);
+        } else {
+            if (unionIndex47 == 1) {
+                Utf8 charSequence47;
+                Object oldString47 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(47);
+                if (oldString47 instanceof Utf8) {
+                    charSequence47 = (decoder).readString(((Utf8) oldString47));
+                } else {
+                    charSequence47 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, charSequence47);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F47': "+ unionIndex47));
+            }
+        }
+        int unionIndex48 = (decoder.readIndex());
+        if (unionIndex48 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, null);
+        } else {
+            if (unionIndex48 == 1) {
+                Utf8 charSequence48;
+                Object oldString48 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(48);
+                if (oldString48 instanceof Utf8) {
+                    charSequence48 = (decoder).readString(((Utf8) oldString48));
+                } else {
+                    charSequence48 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, charSequence48);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F48': "+ unionIndex48));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex49 = (decoder.readIndex());
+        if (unionIndex49 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, null);
+        } else {
+            if (unionIndex49 == 1) {
+                Utf8 charSequence49;
+                Object oldString49 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(49);
+                if (oldString49 instanceof Utf8) {
+                    charSequence49 = (decoder).readString(((Utf8) oldString49));
+                } else {
+                    charSequence49 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, charSequence49);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F49': "+ unionIndex49));
+            }
+        }
+        int unionIndex50 = (decoder.readIndex());
+        if (unionIndex50 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, null);
+        } else {
+            if (unionIndex50 == 1) {
+                Utf8 charSequence50;
+                Object oldString50 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(50);
+                if (oldString50 instanceof Utf8) {
+                    charSequence50 = (decoder).readString(((Utf8) oldString50));
+                } else {
+                    charSequence50 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, charSequence50);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F50': "+ unionIndex50));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex51 = (decoder.readIndex());
+        if (unionIndex51 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, null);
+        } else {
+            if (unionIndex51 == 1) {
+                Utf8 charSequence51;
+                Object oldString51 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(51);
+                if (oldString51 instanceof Utf8) {
+                    charSequence51 = (decoder).readString(((Utf8) oldString51));
+                } else {
+                    charSequence51 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, charSequence51);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F51': "+ unionIndex51));
+            }
+        }
+        int unionIndex52 = (decoder.readIndex());
+        if (unionIndex52 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, null);
+        } else {
+            if (unionIndex52 == 1) {
+                Utf8 charSequence52;
+                Object oldString52 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(52);
+                if (oldString52 instanceof Utf8) {
+                    charSequence52 = (decoder).readString(((Utf8) oldString52));
+                } else {
+                    charSequence52 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, charSequence52);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F52': "+ unionIndex52));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex53 = (decoder.readIndex());
+        if (unionIndex53 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, null);
+        } else {
+            if (unionIndex53 == 1) {
+                Utf8 charSequence53;
+                Object oldString53 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(53);
+                if (oldString53 instanceof Utf8) {
+                    charSequence53 = (decoder).readString(((Utf8) oldString53));
+                } else {
+                    charSequence53 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, charSequence53);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F53': "+ unionIndex53));
+            }
+        }
+        int unionIndex54 = (decoder.readIndex());
+        if (unionIndex54 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, null);
+        } else {
+            if (unionIndex54 == 1) {
+                Utf8 charSequence54;
+                Object oldString54 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(54);
+                if (oldString54 instanceof Utf8) {
+                    charSequence54 = (decoder).readString(((Utf8) oldString54));
+                } else {
+                    charSequence54 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, charSequence54);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F54': "+ unionIndex54));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex55 = (decoder.readIndex());
+        if (unionIndex55 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, null);
+        } else {
+            if (unionIndex55 == 1) {
+                Utf8 charSequence55;
+                Object oldString55 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(55);
+                if (oldString55 instanceof Utf8) {
+                    charSequence55 = (decoder).readString(((Utf8) oldString55));
+                } else {
+                    charSequence55 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, charSequence55);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F55': "+ unionIndex55));
+            }
+        }
+        int unionIndex56 = (decoder.readIndex());
+        if (unionIndex56 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, null);
+        } else {
+            if (unionIndex56 == 1) {
+                Utf8 charSequence56;
+                Object oldString56 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(56);
+                if (oldString56 instanceof Utf8) {
+                    charSequence56 = (decoder).readString(((Utf8) oldString56));
+                } else {
+                    charSequence56 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, charSequence56);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F56': "+ unionIndex56));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex57 = (decoder.readIndex());
+        if (unionIndex57 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, null);
+        } else {
+            if (unionIndex57 == 1) {
+                Utf8 charSequence57;
+                Object oldString57 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(57);
+                if (oldString57 instanceof Utf8) {
+                    charSequence57 = (decoder).readString(((Utf8) oldString57));
+                } else {
+                    charSequence57 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, charSequence57);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F57': "+ unionIndex57));
+            }
+        }
+        int unionIndex58 = (decoder.readIndex());
+        if (unionIndex58 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, null);
+        } else {
+            if (unionIndex58 == 1) {
+                Utf8 charSequence58;
+                Object oldString58 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(58);
+                if (oldString58 instanceof Utf8) {
+                    charSequence58 = (decoder).readString(((Utf8) oldString58));
+                } else {
+                    charSequence58 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, charSequence58);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F58': "+ unionIndex58));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex59 = (decoder.readIndex());
+        if (unionIndex59 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, null);
+        } else {
+            if (unionIndex59 == 1) {
+                Utf8 charSequence59;
+                Object oldString59 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(59);
+                if (oldString59 instanceof Utf8) {
+                    charSequence59 = (decoder).readString(((Utf8) oldString59));
+                } else {
+                    charSequence59 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, charSequence59);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F59': "+ unionIndex59));
+            }
+        }
+        int unionIndex60 = (decoder.readIndex());
+        if (unionIndex60 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, null);
+        } else {
+            if (unionIndex60 == 1) {
+                Utf8 charSequence60;
+                Object oldString60 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(60);
+                if (oldString60 instanceof Utf8) {
+                    charSequence60 = (decoder).readString(((Utf8) oldString60));
+                } else {
+                    charSequence60 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, charSequence60);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F60': "+ unionIndex60));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex61 = (decoder.readIndex());
+        if (unionIndex61 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, null);
+        } else {
+            if (unionIndex61 == 1) {
+                Utf8 charSequence61;
+                Object oldString61 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(61);
+                if (oldString61 instanceof Utf8) {
+                    charSequence61 = (decoder).readString(((Utf8) oldString61));
+                } else {
+                    charSequence61 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, charSequence61);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F61': "+ unionIndex61));
+            }
+        }
+        int unionIndex62 = (decoder.readIndex());
+        if (unionIndex62 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, null);
+        } else {
+            if (unionIndex62 == 1) {
+                Utf8 charSequence62;
+                Object oldString62 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(62);
+                if (oldString62 instanceof Utf8) {
+                    charSequence62 = (decoder).readString(((Utf8) oldString62));
+                } else {
+                    charSequence62 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, charSequence62);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F62': "+ unionIndex62));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex63 = (decoder.readIndex());
+        if (unionIndex63 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, null);
+        } else {
+            if (unionIndex63 == 1) {
+                Utf8 charSequence63;
+                Object oldString63 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(63);
+                if (oldString63 instanceof Utf8) {
+                    charSequence63 = (decoder).readString(((Utf8) oldString63));
+                } else {
+                    charSequence63 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, charSequence63);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F63': "+ unionIndex63));
+            }
+        }
+        int unionIndex64 = (decoder.readIndex());
+        if (unionIndex64 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, null);
+        } else {
+            if (unionIndex64 == 1) {
+                Utf8 charSequence64;
+                Object oldString64 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(64);
+                if (oldString64 instanceof Utf8) {
+                    charSequence64 = (decoder).readString(((Utf8) oldString64));
+                } else {
+                    charSequence64 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, charSequence64);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F64': "+ unionIndex64));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex65 = (decoder.readIndex());
+        if (unionIndex65 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, null);
+        } else {
+            if (unionIndex65 == 1) {
+                Utf8 charSequence65;
+                Object oldString65 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(65);
+                if (oldString65 instanceof Utf8) {
+                    charSequence65 = (decoder).readString(((Utf8) oldString65));
+                } else {
+                    charSequence65 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, charSequence65);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F65': "+ unionIndex65));
+            }
+        }
+        int unionIndex66 = (decoder.readIndex());
+        if (unionIndex66 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, null);
+        } else {
+            if (unionIndex66 == 1) {
+                Utf8 charSequence66;
+                Object oldString66 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(66);
+                if (oldString66 instanceof Utf8) {
+                    charSequence66 = (decoder).readString(((Utf8) oldString66));
+                } else {
+                    charSequence66 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, charSequence66);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F66': "+ unionIndex66));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex67 = (decoder.readIndex());
+        if (unionIndex67 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, null);
+        } else {
+            if (unionIndex67 == 1) {
+                Utf8 charSequence67;
+                Object oldString67 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(67);
+                if (oldString67 instanceof Utf8) {
+                    charSequence67 = (decoder).readString(((Utf8) oldString67));
+                } else {
+                    charSequence67 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, charSequence67);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F67': "+ unionIndex67));
+            }
+        }
+        int unionIndex68 = (decoder.readIndex());
+        if (unionIndex68 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, null);
+        } else {
+            if (unionIndex68 == 1) {
+                Utf8 charSequence68;
+                Object oldString68 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(68);
+                if (oldString68 instanceof Utf8) {
+                    charSequence68 = (decoder).readString(((Utf8) oldString68));
+                } else {
+                    charSequence68 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, charSequence68);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F68': "+ unionIndex68));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex69 = (decoder.readIndex());
+        if (unionIndex69 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, null);
+        } else {
+            if (unionIndex69 == 1) {
+                Utf8 charSequence69;
+                Object oldString69 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(69);
+                if (oldString69 instanceof Utf8) {
+                    charSequence69 = (decoder).readString(((Utf8) oldString69));
+                } else {
+                    charSequence69 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, charSequence69);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F69': "+ unionIndex69));
+            }
+        }
+        int unionIndex70 = (decoder.readIndex());
+        if (unionIndex70 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, null);
+        } else {
+            if (unionIndex70 == 1) {
+                Utf8 charSequence70;
+                Object oldString70 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(70);
+                if (oldString70 instanceof Utf8) {
+                    charSequence70 = (decoder).readString(((Utf8) oldString70));
+                } else {
+                    charSequence70 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, charSequence70);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F70': "+ unionIndex70));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex71 = (decoder.readIndex());
+        if (unionIndex71 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, null);
+        } else {
+            if (unionIndex71 == 1) {
+                Utf8 charSequence71;
+                Object oldString71 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(71);
+                if (oldString71 instanceof Utf8) {
+                    charSequence71 = (decoder).readString(((Utf8) oldString71));
+                } else {
+                    charSequence71 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, charSequence71);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F71': "+ unionIndex71));
+            }
+        }
+        int unionIndex72 = (decoder.readIndex());
+        if (unionIndex72 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, null);
+        } else {
+            if (unionIndex72 == 1) {
+                Utf8 charSequence72;
+                Object oldString72 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(72);
+                if (oldString72 instanceof Utf8) {
+                    charSequence72 = (decoder).readString(((Utf8) oldString72));
+                } else {
+                    charSequence72 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, charSequence72);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F72': "+ unionIndex72));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex73 = (decoder.readIndex());
+        if (unionIndex73 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, null);
+        } else {
+            if (unionIndex73 == 1) {
+                Utf8 charSequence73;
+                Object oldString73 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(73);
+                if (oldString73 instanceof Utf8) {
+                    charSequence73 = (decoder).readString(((Utf8) oldString73));
+                } else {
+                    charSequence73 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, charSequence73);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F73': "+ unionIndex73));
+            }
+        }
+        int unionIndex74 = (decoder.readIndex());
+        if (unionIndex74 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, null);
+        } else {
+            if (unionIndex74 == 1) {
+                Utf8 charSequence74;
+                Object oldString74 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(74);
+                if (oldString74 instanceof Utf8) {
+                    charSequence74 = (decoder).readString(((Utf8) oldString74));
+                } else {
+                    charSequence74 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, charSequence74);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F74': "+ unionIndex74));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex75 = (decoder.readIndex());
+        if (unionIndex75 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, null);
+        } else {
+            if (unionIndex75 == 1) {
+                Utf8 charSequence75;
+                Object oldString75 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(75);
+                if (oldString75 instanceof Utf8) {
+                    charSequence75 = (decoder).readString(((Utf8) oldString75));
+                } else {
+                    charSequence75 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, charSequence75);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F75': "+ unionIndex75));
+            }
+        }
+        int unionIndex76 = (decoder.readIndex());
+        if (unionIndex76 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, null);
+        } else {
+            if (unionIndex76 == 1) {
+                Utf8 charSequence76;
+                Object oldString76 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(76);
+                if (oldString76 instanceof Utf8) {
+                    charSequence76 = (decoder).readString(((Utf8) oldString76));
+                } else {
+                    charSequence76 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, charSequence76);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F76': "+ unionIndex76));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex77 = (decoder.readIndex());
+        if (unionIndex77 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, null);
+        } else {
+            if (unionIndex77 == 1) {
+                Utf8 charSequence77;
+                Object oldString77 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(77);
+                if (oldString77 instanceof Utf8) {
+                    charSequence77 = (decoder).readString(((Utf8) oldString77));
+                } else {
+                    charSequence77 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, charSequence77);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F77': "+ unionIndex77));
+            }
+        }
+        int unionIndex78 = (decoder.readIndex());
+        if (unionIndex78 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, null);
+        } else {
+            if (unionIndex78 == 1) {
+                Utf8 charSequence78;
+                Object oldString78 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(78);
+                if (oldString78 instanceof Utf8) {
+                    charSequence78 = (decoder).readString(((Utf8) oldString78));
+                } else {
+                    charSequence78 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, charSequence78);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F78': "+ unionIndex78));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex79 = (decoder.readIndex());
+        if (unionIndex79 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, null);
+        } else {
+            if (unionIndex79 == 1) {
+                Utf8 charSequence79;
+                Object oldString79 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(79);
+                if (oldString79 instanceof Utf8) {
+                    charSequence79 = (decoder).readString(((Utf8) oldString79));
+                } else {
+                    charSequence79 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, charSequence79);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F79': "+ unionIndex79));
+            }
+        }
+        int unionIndex80 = (decoder.readIndex());
+        if (unionIndex80 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, null);
+        } else {
+            if (unionIndex80 == 1) {
+                Utf8 charSequence80;
+                Object oldString80 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(80);
+                if (oldString80 instanceof Utf8) {
+                    charSequence80 = (decoder).readString(((Utf8) oldString80));
+                } else {
+                    charSequence80 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, charSequence80);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F80': "+ unionIndex80));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex81 = (decoder.readIndex());
+        if (unionIndex81 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, null);
+        } else {
+            if (unionIndex81 == 1) {
+                Utf8 charSequence81;
+                Object oldString81 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(81);
+                if (oldString81 instanceof Utf8) {
+                    charSequence81 = (decoder).readString(((Utf8) oldString81));
+                } else {
+                    charSequence81 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, charSequence81);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F81': "+ unionIndex81));
+            }
+        }
+        int unionIndex82 = (decoder.readIndex());
+        if (unionIndex82 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, null);
+        } else {
+            if (unionIndex82 == 1) {
+                Utf8 charSequence82;
+                Object oldString82 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(82);
+                if (oldString82 instanceof Utf8) {
+                    charSequence82 = (decoder).readString(((Utf8) oldString82));
+                } else {
+                    charSequence82 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, charSequence82);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F82': "+ unionIndex82));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex83 = (decoder.readIndex());
+        if (unionIndex83 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, null);
+        } else {
+            if (unionIndex83 == 1) {
+                Utf8 charSequence83;
+                Object oldString83 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(83);
+                if (oldString83 instanceof Utf8) {
+                    charSequence83 = (decoder).readString(((Utf8) oldString83));
+                } else {
+                    charSequence83 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, charSequence83);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F83': "+ unionIndex83));
+            }
+        }
+        int unionIndex84 = (decoder.readIndex());
+        if (unionIndex84 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, null);
+        } else {
+            if (unionIndex84 == 1) {
+                Utf8 charSequence84;
+                Object oldString84 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(84);
+                if (oldString84 instanceof Utf8) {
+                    charSequence84 = (decoder).readString(((Utf8) oldString84));
+                } else {
+                    charSequence84 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, charSequence84);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F84': "+ unionIndex84));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex85 = (decoder.readIndex());
+        if (unionIndex85 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, null);
+        } else {
+            if (unionIndex85 == 1) {
+                Utf8 charSequence85;
+                Object oldString85 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(85);
+                if (oldString85 instanceof Utf8) {
+                    charSequence85 = (decoder).readString(((Utf8) oldString85));
+                } else {
+                    charSequence85 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, charSequence85);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F85': "+ unionIndex85));
+            }
+        }
+        int unionIndex86 = (decoder.readIndex());
+        if (unionIndex86 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, null);
+        } else {
+            if (unionIndex86 == 1) {
+                Utf8 charSequence86;
+                Object oldString86 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(86);
+                if (oldString86 instanceof Utf8) {
+                    charSequence86 = (decoder).readString(((Utf8) oldString86));
+                } else {
+                    charSequence86 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, charSequence86);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F86': "+ unionIndex86));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex87 = (decoder.readIndex());
+        if (unionIndex87 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, null);
+        } else {
+            if (unionIndex87 == 1) {
+                Utf8 charSequence87;
+                Object oldString87 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(87);
+                if (oldString87 instanceof Utf8) {
+                    charSequence87 = (decoder).readString(((Utf8) oldString87));
+                } else {
+                    charSequence87 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, charSequence87);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F87': "+ unionIndex87));
+            }
+        }
+        int unionIndex88 = (decoder.readIndex());
+        if (unionIndex88 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, null);
+        } else {
+            if (unionIndex88 == 1) {
+                Utf8 charSequence88;
+                Object oldString88 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(88);
+                if (oldString88 instanceof Utf8) {
+                    charSequence88 = (decoder).readString(((Utf8) oldString88));
+                } else {
+                    charSequence88 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, charSequence88);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F88': "+ unionIndex88));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex89 = (decoder.readIndex());
+        if (unionIndex89 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, null);
+        } else {
+            if (unionIndex89 == 1) {
+                Utf8 charSequence89;
+                Object oldString89 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(89);
+                if (oldString89 instanceof Utf8) {
+                    charSequence89 = (decoder).readString(((Utf8) oldString89));
+                } else {
+                    charSequence89 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, charSequence89);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F89': "+ unionIndex89));
+            }
+        }
+        int unionIndex90 = (decoder.readIndex());
+        if (unionIndex90 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, null);
+        } else {
+            if (unionIndex90 == 1) {
+                Utf8 charSequence90;
+                Object oldString90 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(90);
+                if (oldString90 instanceof Utf8) {
+                    charSequence90 = (decoder).readString(((Utf8) oldString90));
+                } else {
+                    charSequence90 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, charSequence90);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F90': "+ unionIndex90));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex91 = (decoder.readIndex());
+        if (unionIndex91 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, null);
+        } else {
+            if (unionIndex91 == 1) {
+                Utf8 charSequence91;
+                Object oldString91 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(91);
+                if (oldString91 instanceof Utf8) {
+                    charSequence91 = (decoder).readString(((Utf8) oldString91));
+                } else {
+                    charSequence91 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, charSequence91);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F91': "+ unionIndex91));
+            }
+        }
+        int unionIndex92 = (decoder.readIndex());
+        if (unionIndex92 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, null);
+        } else {
+            if (unionIndex92 == 1) {
+                Utf8 charSequence92;
+                Object oldString92 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(92);
+                if (oldString92 instanceof Utf8) {
+                    charSequence92 = (decoder).readString(((Utf8) oldString92));
+                } else {
+                    charSequence92 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, charSequence92);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F92': "+ unionIndex92));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex93 = (decoder.readIndex());
+        if (unionIndex93 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, null);
+        } else {
+            if (unionIndex93 == 1) {
+                Utf8 charSequence93;
+                Object oldString93 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(93);
+                if (oldString93 instanceof Utf8) {
+                    charSequence93 = (decoder).readString(((Utf8) oldString93));
+                } else {
+                    charSequence93 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, charSequence93);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F93': "+ unionIndex93));
+            }
+        }
+        int unionIndex94 = (decoder.readIndex());
+        if (unionIndex94 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, null);
+        } else {
+            if (unionIndex94 == 1) {
+                Utf8 charSequence94;
+                Object oldString94 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(94);
+                if (oldString94 instanceof Utf8) {
+                    charSequence94 = (decoder).readString(((Utf8) oldString94));
+                } else {
+                    charSequence94 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, charSequence94);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F94': "+ unionIndex94));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex95 = (decoder.readIndex());
+        if (unionIndex95 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, null);
+        } else {
+            if (unionIndex95 == 1) {
+                Utf8 charSequence95;
+                Object oldString95 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(95);
+                if (oldString95 instanceof Utf8) {
+                    charSequence95 = (decoder).readString(((Utf8) oldString95));
+                } else {
+                    charSequence95 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, charSequence95);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F95': "+ unionIndex95));
+            }
+        }
+        int unionIndex96 = (decoder.readIndex());
+        if (unionIndex96 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, null);
+        } else {
+            if (unionIndex96 == 1) {
+                Utf8 charSequence96;
+                Object oldString96 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(96);
+                if (oldString96 instanceof Utf8) {
+                    charSequence96 = (decoder).readString(((Utf8) oldString96));
+                } else {
+                    charSequence96 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, charSequence96);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F96': "+ unionIndex96));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex97 = (decoder.readIndex());
+        if (unionIndex97 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, null);
+        } else {
+            if (unionIndex97 == 1) {
+                Utf8 charSequence97;
+                Object oldString97 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(97);
+                if (oldString97 instanceof Utf8) {
+                    charSequence97 = (decoder).readString(((Utf8) oldString97));
+                } else {
+                    charSequence97 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, charSequence97);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F97': "+ unionIndex97));
+            }
+        }
+        int unionIndex98 = (decoder.readIndex());
+        if (unionIndex98 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, null);
+        } else {
+            if (unionIndex98 == 1) {
+                Utf8 charSequence98;
+                Object oldString98 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(98);
+                if (oldString98 instanceof Utf8) {
+                    charSequence98 = (decoder).readString(((Utf8) oldString98));
+                } else {
+                    charSequence98 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, charSequence98);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F98': "+ unionIndex98));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex99 = (decoder.readIndex());
+        if (unionIndex99 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, null);
+        } else {
+            if (unionIndex99 == 1) {
+                Utf8 charSequence99;
+                Object oldString99 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(99);
+                if (oldString99 instanceof Utf8) {
+                    charSequence99 = (decoder).readString(((Utf8) oldString99));
+                } else {
+                    charSequence99 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, charSequence99);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F99': "+ unionIndex99));
+            }
+        }
+        int unionIndex100 = (decoder.readIndex());
+        if (unionIndex100 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, null);
+        } else {
+            if (unionIndex100 == 1) {
+                Utf8 charSequence100;
+                Object oldString100 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(100);
+                if (oldString100 instanceof Utf8) {
+                    charSequence100 = (decoder).readString(((Utf8) oldString100));
+                } else {
+                    charSequence100 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, charSequence100);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F100': "+ unionIndex100));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex101 = (decoder.readIndex());
+        if (unionIndex101 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, null);
+        } else {
+            if (unionIndex101 == 1) {
+                Utf8 charSequence101;
+                Object oldString101 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(101);
+                if (oldString101 instanceof Utf8) {
+                    charSequence101 = (decoder).readString(((Utf8) oldString101));
+                } else {
+                    charSequence101 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, charSequence101);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F101': "+ unionIndex101));
+            }
+        }
+        int unionIndex102 = (decoder.readIndex());
+        if (unionIndex102 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, null);
+        } else {
+            if (unionIndex102 == 1) {
+                Utf8 charSequence102;
+                Object oldString102 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(102);
+                if (oldString102 instanceof Utf8) {
+                    charSequence102 = (decoder).readString(((Utf8) oldString102));
+                } else {
+                    charSequence102 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, charSequence102);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F102': "+ unionIndex102));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex103 = (decoder.readIndex());
+        if (unionIndex103 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, null);
+        } else {
+            if (unionIndex103 == 1) {
+                Utf8 charSequence103;
+                Object oldString103 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(103);
+                if (oldString103 instanceof Utf8) {
+                    charSequence103 = (decoder).readString(((Utf8) oldString103));
+                } else {
+                    charSequence103 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, charSequence103);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F103': "+ unionIndex103));
+            }
+        }
+        int unionIndex104 = (decoder.readIndex());
+        if (unionIndex104 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, null);
+        } else {
+            if (unionIndex104 == 1) {
+                Utf8 charSequence104;
+                Object oldString104 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(104);
+                if (oldString104 instanceof Utf8) {
+                    charSequence104 = (decoder).readString(((Utf8) oldString104));
+                } else {
+                    charSequence104 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, charSequence104);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F104': "+ unionIndex104));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex105 = (decoder.readIndex());
+        if (unionIndex105 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, null);
+        } else {
+            if (unionIndex105 == 1) {
+                Utf8 charSequence105;
+                Object oldString105 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(105);
+                if (oldString105 instanceof Utf8) {
+                    charSequence105 = (decoder).readString(((Utf8) oldString105));
+                } else {
+                    charSequence105 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, charSequence105);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F105': "+ unionIndex105));
+            }
+        }
+        int unionIndex106 = (decoder.readIndex());
+        if (unionIndex106 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, null);
+        } else {
+            if (unionIndex106 == 1) {
+                Utf8 charSequence106;
+                Object oldString106 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(106);
+                if (oldString106 instanceof Utf8) {
+                    charSequence106 = (decoder).readString(((Utf8) oldString106));
+                } else {
+                    charSequence106 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, charSequence106);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F106': "+ unionIndex106));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex107 = (decoder.readIndex());
+        if (unionIndex107 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, null);
+        } else {
+            if (unionIndex107 == 1) {
+                Utf8 charSequence107;
+                Object oldString107 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(107);
+                if (oldString107 instanceof Utf8) {
+                    charSequence107 = (decoder).readString(((Utf8) oldString107));
+                } else {
+                    charSequence107 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, charSequence107);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F107': "+ unionIndex107));
+            }
+        }
+        int unionIndex108 = (decoder.readIndex());
+        if (unionIndex108 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, null);
+        } else {
+            if (unionIndex108 == 1) {
+                Utf8 charSequence108;
+                Object oldString108 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(108);
+                if (oldString108 instanceof Utf8) {
+                    charSequence108 = (decoder).readString(((Utf8) oldString108));
+                } else {
+                    charSequence108 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, charSequence108);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F108': "+ unionIndex108));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex109 = (decoder.readIndex());
+        if (unionIndex109 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, null);
+        } else {
+            if (unionIndex109 == 1) {
+                Utf8 charSequence109;
+                Object oldString109 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(109);
+                if (oldString109 instanceof Utf8) {
+                    charSequence109 = (decoder).readString(((Utf8) oldString109));
+                } else {
+                    charSequence109 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, charSequence109);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F109': "+ unionIndex109));
+            }
+        }
+        int unionIndex110 = (decoder.readIndex());
+        if (unionIndex110 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, null);
+        } else {
+            if (unionIndex110 == 1) {
+                Utf8 charSequence110;
+                Object oldString110 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(110);
+                if (oldString110 instanceof Utf8) {
+                    charSequence110 = (decoder).readString(((Utf8) oldString110));
+                } else {
+                    charSequence110 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, charSequence110);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F110': "+ unionIndex110));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex111 = (decoder.readIndex());
+        if (unionIndex111 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, null);
+        } else {
+            if (unionIndex111 == 1) {
+                Utf8 charSequence111;
+                Object oldString111 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(111);
+                if (oldString111 instanceof Utf8) {
+                    charSequence111 = (decoder).readString(((Utf8) oldString111));
+                } else {
+                    charSequence111 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, charSequence111);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F111': "+ unionIndex111));
+            }
+        }
+        int unionIndex112 = (decoder.readIndex());
+        if (unionIndex112 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, null);
+        } else {
+            if (unionIndex112 == 1) {
+                Utf8 charSequence112;
+                Object oldString112 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(112);
+                if (oldString112 instanceof Utf8) {
+                    charSequence112 = (decoder).readString(((Utf8) oldString112));
+                } else {
+                    charSequence112 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, charSequence112);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F112': "+ unionIndex112));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex113 = (decoder.readIndex());
+        if (unionIndex113 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, null);
+        } else {
+            if (unionIndex113 == 1) {
+                Utf8 charSequence113;
+                Object oldString113 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(113);
+                if (oldString113 instanceof Utf8) {
+                    charSequence113 = (decoder).readString(((Utf8) oldString113));
+                } else {
+                    charSequence113 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, charSequence113);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F113': "+ unionIndex113));
+            }
+        }
+        int unionIndex114 = (decoder.readIndex());
+        if (unionIndex114 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, null);
+        } else {
+            if (unionIndex114 == 1) {
+                Utf8 charSequence114;
+                Object oldString114 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(114);
+                if (oldString114 instanceof Utf8) {
+                    charSequence114 = (decoder).readString(((Utf8) oldString114));
+                } else {
+                    charSequence114 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, charSequence114);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F114': "+ unionIndex114));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex115 = (decoder.readIndex());
+        if (unionIndex115 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, null);
+        } else {
+            if (unionIndex115 == 1) {
+                Utf8 charSequence115;
+                Object oldString115 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(115);
+                if (oldString115 instanceof Utf8) {
+                    charSequence115 = (decoder).readString(((Utf8) oldString115));
+                } else {
+                    charSequence115 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, charSequence115);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F115': "+ unionIndex115));
+            }
+        }
+        int unionIndex116 = (decoder.readIndex());
+        if (unionIndex116 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, null);
+        } else {
+            if (unionIndex116 == 1) {
+                Utf8 charSequence116;
+                Object oldString116 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(116);
+                if (oldString116 instanceof Utf8) {
+                    charSequence116 = (decoder).readString(((Utf8) oldString116));
+                } else {
+                    charSequence116 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, charSequence116);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F116': "+ unionIndex116));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex117 = (decoder.readIndex());
+        if (unionIndex117 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, null);
+        } else {
+            if (unionIndex117 == 1) {
+                Utf8 charSequence117;
+                Object oldString117 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(117);
+                if (oldString117 instanceof Utf8) {
+                    charSequence117 = (decoder).readString(((Utf8) oldString117));
+                } else {
+                    charSequence117 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, charSequence117);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F117': "+ unionIndex117));
+            }
+        }
+        int unionIndex118 = (decoder.readIndex());
+        if (unionIndex118 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, null);
+        } else {
+            if (unionIndex118 == 1) {
+                Utf8 charSequence118;
+                Object oldString118 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(118);
+                if (oldString118 instanceof Utf8) {
+                    charSequence118 = (decoder).readString(((Utf8) oldString118));
+                } else {
+                    charSequence118 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, charSequence118);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F118': "+ unionIndex118));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex119 = (decoder.readIndex());
+        if (unionIndex119 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, null);
+        } else {
+            if (unionIndex119 == 1) {
+                Utf8 charSequence119;
+                Object oldString119 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(119);
+                if (oldString119 instanceof Utf8) {
+                    charSequence119 = (decoder).readString(((Utf8) oldString119));
+                } else {
+                    charSequence119 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, charSequence119);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F119': "+ unionIndex119));
+            }
+        }
+        int unionIndex120 = (decoder.readIndex());
+        if (unionIndex120 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, null);
+        } else {
+            if (unionIndex120 == 1) {
+                Utf8 charSequence120;
+                Object oldString120 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(120);
+                if (oldString120 instanceof Utf8) {
+                    charSequence120 = (decoder).readString(((Utf8) oldString120));
+                } else {
+                    charSequence120 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, charSequence120);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F120': "+ unionIndex120));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex121 = (decoder.readIndex());
+        if (unionIndex121 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, null);
+        } else {
+            if (unionIndex121 == 1) {
+                Utf8 charSequence121;
+                Object oldString121 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(121);
+                if (oldString121 instanceof Utf8) {
+                    charSequence121 = (decoder).readString(((Utf8) oldString121));
+                } else {
+                    charSequence121 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, charSequence121);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F121': "+ unionIndex121));
+            }
+        }
+        int unionIndex122 = (decoder.readIndex());
+        if (unionIndex122 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, null);
+        } else {
+            if (unionIndex122 == 1) {
+                Utf8 charSequence122;
+                Object oldString122 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(122);
+                if (oldString122 instanceof Utf8) {
+                    charSequence122 = (decoder).readString(((Utf8) oldString122));
+                } else {
+                    charSequence122 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, charSequence122);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F122': "+ unionIndex122));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex123 = (decoder.readIndex());
+        if (unionIndex123 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, null);
+        } else {
+            if (unionIndex123 == 1) {
+                Utf8 charSequence123;
+                Object oldString123 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(123);
+                if (oldString123 instanceof Utf8) {
+                    charSequence123 = (decoder).readString(((Utf8) oldString123));
+                } else {
+                    charSequence123 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, charSequence123);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F123': "+ unionIndex123));
+            }
+        }
+        int unionIndex124 = (decoder.readIndex());
+        if (unionIndex124 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, null);
+        } else {
+            if (unionIndex124 == 1) {
+                Utf8 charSequence124;
+                Object oldString124 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(124);
+                if (oldString124 instanceof Utf8) {
+                    charSequence124 = (decoder).readString(((Utf8) oldString124));
+                } else {
+                    charSequence124 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, charSequence124);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F124': "+ unionIndex124));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex125 = (decoder.readIndex());
+        if (unionIndex125 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, null);
+        } else {
+            if (unionIndex125 == 1) {
+                Utf8 charSequence125;
+                Object oldString125 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(125);
+                if (oldString125 instanceof Utf8) {
+                    charSequence125 = (decoder).readString(((Utf8) oldString125));
+                } else {
+                    charSequence125 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, charSequence125);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F125': "+ unionIndex125));
+            }
+        }
+        int unionIndex126 = (decoder.readIndex());
+        if (unionIndex126 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, null);
+        } else {
+            if (unionIndex126 == 1) {
+                Utf8 charSequence126;
+                Object oldString126 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(126);
+                if (oldString126 instanceof Utf8) {
+                    charSequence126 = (decoder).readString(((Utf8) oldString126));
+                } else {
+                    charSequence126 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, charSequence126);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F126': "+ unionIndex126));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex127 = (decoder.readIndex());
+        if (unionIndex127 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, null);
+        } else {
+            if (unionIndex127 == 1) {
+                Utf8 charSequence127;
+                Object oldString127 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(127);
+                if (oldString127 instanceof Utf8) {
+                    charSequence127 = (decoder).readString(((Utf8) oldString127));
+                } else {
+                    charSequence127 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, charSequence127);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F127': "+ unionIndex127));
+            }
+        }
+        int unionIndex128 = (decoder.readIndex());
+        if (unionIndex128 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, null);
+        } else {
+            if (unionIndex128 == 1) {
+                Utf8 charSequence128;
+                Object oldString128 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(128);
+                if (oldString128 instanceof Utf8) {
+                    charSequence128 = (decoder).readString(((Utf8) oldString128));
+                } else {
+                    charSequence128 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, charSequence128);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F128': "+ unionIndex128));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex129 = (decoder.readIndex());
+        if (unionIndex129 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, null);
+        } else {
+            if (unionIndex129 == 1) {
+                Utf8 charSequence129;
+                Object oldString129 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(129);
+                if (oldString129 instanceof Utf8) {
+                    charSequence129 = (decoder).readString(((Utf8) oldString129));
+                } else {
+                    charSequence129 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, charSequence129);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F129': "+ unionIndex129));
+            }
+        }
+        int unionIndex130 = (decoder.readIndex());
+        if (unionIndex130 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, null);
+        } else {
+            if (unionIndex130 == 1) {
+                Utf8 charSequence130;
+                Object oldString130 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(130);
+                if (oldString130 instanceof Utf8) {
+                    charSequence130 = (decoder).readString(((Utf8) oldString130));
+                } else {
+                    charSequence130 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, charSequence130);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F130': "+ unionIndex130));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex131 = (decoder.readIndex());
+        if (unionIndex131 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, null);
+        } else {
+            if (unionIndex131 == 1) {
+                Utf8 charSequence131;
+                Object oldString131 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(131);
+                if (oldString131 instanceof Utf8) {
+                    charSequence131 = (decoder).readString(((Utf8) oldString131));
+                } else {
+                    charSequence131 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, charSequence131);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F131': "+ unionIndex131));
+            }
+        }
+        int unionIndex132 = (decoder.readIndex());
+        if (unionIndex132 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, null);
+        } else {
+            if (unionIndex132 == 1) {
+                Utf8 charSequence132;
+                Object oldString132 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(132);
+                if (oldString132 instanceof Utf8) {
+                    charSequence132 = (decoder).readString(((Utf8) oldString132));
+                } else {
+                    charSequence132 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, charSequence132);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F132': "+ unionIndex132));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex133 = (decoder.readIndex());
+        if (unionIndex133 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, null);
+        } else {
+            if (unionIndex133 == 1) {
+                Utf8 charSequence133;
+                Object oldString133 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(133);
+                if (oldString133 instanceof Utf8) {
+                    charSequence133 = (decoder).readString(((Utf8) oldString133));
+                } else {
+                    charSequence133 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, charSequence133);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F133': "+ unionIndex133));
+            }
+        }
+        int unionIndex134 = (decoder.readIndex());
+        if (unionIndex134 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, null);
+        } else {
+            if (unionIndex134 == 1) {
+                Utf8 charSequence134;
+                Object oldString134 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(134);
+                if (oldString134 instanceof Utf8) {
+                    charSequence134 = (decoder).readString(((Utf8) oldString134));
+                } else {
+                    charSequence134 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, charSequence134);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F134': "+ unionIndex134));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex135 = (decoder.readIndex());
+        if (unionIndex135 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, null);
+        } else {
+            if (unionIndex135 == 1) {
+                Utf8 charSequence135;
+                Object oldString135 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(135);
+                if (oldString135 instanceof Utf8) {
+                    charSequence135 = (decoder).readString(((Utf8) oldString135));
+                } else {
+                    charSequence135 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, charSequence135);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F135': "+ unionIndex135));
+            }
+        }
+        int unionIndex136 = (decoder.readIndex());
+        if (unionIndex136 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, null);
+        } else {
+            if (unionIndex136 == 1) {
+                Utf8 charSequence136;
+                Object oldString136 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(136);
+                if (oldString136 instanceof Utf8) {
+                    charSequence136 = (decoder).readString(((Utf8) oldString136));
+                } else {
+                    charSequence136 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, charSequence136);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F136': "+ unionIndex136));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex137 = (decoder.readIndex());
+        if (unionIndex137 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, null);
+        } else {
+            if (unionIndex137 == 1) {
+                Utf8 charSequence137;
+                Object oldString137 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(137);
+                if (oldString137 instanceof Utf8) {
+                    charSequence137 = (decoder).readString(((Utf8) oldString137));
+                } else {
+                    charSequence137 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, charSequence137);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F137': "+ unionIndex137));
+            }
+        }
+        int unionIndex138 = (decoder.readIndex());
+        if (unionIndex138 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, null);
+        } else {
+            if (unionIndex138 == 1) {
+                Utf8 charSequence138;
+                Object oldString138 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(138);
+                if (oldString138 instanceof Utf8) {
+                    charSequence138 = (decoder).readString(((Utf8) oldString138));
+                } else {
+                    charSequence138 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, charSequence138);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F138': "+ unionIndex138));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex139 = (decoder.readIndex());
+        if (unionIndex139 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, null);
+        } else {
+            if (unionIndex139 == 1) {
+                Utf8 charSequence139;
+                Object oldString139 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(139);
+                if (oldString139 instanceof Utf8) {
+                    charSequence139 = (decoder).readString(((Utf8) oldString139));
+                } else {
+                    charSequence139 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, charSequence139);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F139': "+ unionIndex139));
+            }
+        }
+        int unionIndex140 = (decoder.readIndex());
+        if (unionIndex140 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, null);
+        } else {
+            if (unionIndex140 == 1) {
+                Utf8 charSequence140;
+                Object oldString140 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(140);
+                if (oldString140 instanceof Utf8) {
+                    charSequence140 = (decoder).readString(((Utf8) oldString140));
+                } else {
+                    charSequence140 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, charSequence140);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F140': "+ unionIndex140));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex141 = (decoder.readIndex());
+        if (unionIndex141 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, null);
+        } else {
+            if (unionIndex141 == 1) {
+                Utf8 charSequence141;
+                Object oldString141 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(141);
+                if (oldString141 instanceof Utf8) {
+                    charSequence141 = (decoder).readString(((Utf8) oldString141));
+                } else {
+                    charSequence141 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, charSequence141);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F141': "+ unionIndex141));
+            }
+        }
+        int unionIndex142 = (decoder.readIndex());
+        if (unionIndex142 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, null);
+        } else {
+            if (unionIndex142 == 1) {
+                Utf8 charSequence142;
+                Object oldString142 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(142);
+                if (oldString142 instanceof Utf8) {
+                    charSequence142 = (decoder).readString(((Utf8) oldString142));
+                } else {
+                    charSequence142 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, charSequence142);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F142': "+ unionIndex142));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex143 = (decoder.readIndex());
+        if (unionIndex143 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, null);
+        } else {
+            if (unionIndex143 == 1) {
+                Utf8 charSequence143;
+                Object oldString143 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(143);
+                if (oldString143 instanceof Utf8) {
+                    charSequence143 = (decoder).readString(((Utf8) oldString143));
+                } else {
+                    charSequence143 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, charSequence143);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F143': "+ unionIndex143));
+            }
+        }
+        int unionIndex144 = (decoder.readIndex());
+        if (unionIndex144 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, null);
+        } else {
+            if (unionIndex144 == 1) {
+                Utf8 charSequence144;
+                Object oldString144 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(144);
+                if (oldString144 instanceof Utf8) {
+                    charSequence144 = (decoder).readString(((Utf8) oldString144));
+                } else {
+                    charSequence144 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, charSequence144);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F144': "+ unionIndex144));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex145 = (decoder.readIndex());
+        if (unionIndex145 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, null);
+        } else {
+            if (unionIndex145 == 1) {
+                Utf8 charSequence145;
+                Object oldString145 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(145);
+                if (oldString145 instanceof Utf8) {
+                    charSequence145 = (decoder).readString(((Utf8) oldString145));
+                } else {
+                    charSequence145 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, charSequence145);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F145': "+ unionIndex145));
+            }
+        }
+        int unionIndex146 = (decoder.readIndex());
+        if (unionIndex146 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, null);
+        } else {
+            if (unionIndex146 == 1) {
+                Utf8 charSequence146;
+                Object oldString146 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(146);
+                if (oldString146 instanceof Utf8) {
+                    charSequence146 = (decoder).readString(((Utf8) oldString146));
+                } else {
+                    charSequence146 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, charSequence146);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F146': "+ unionIndex146));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex147 = (decoder.readIndex());
+        if (unionIndex147 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, null);
+        } else {
+            if (unionIndex147 == 1) {
+                Utf8 charSequence147;
+                Object oldString147 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(147);
+                if (oldString147 instanceof Utf8) {
+                    charSequence147 = (decoder).readString(((Utf8) oldString147));
+                } else {
+                    charSequence147 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, charSequence147);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F147': "+ unionIndex147));
+            }
+        }
+        int unionIndex148 = (decoder.readIndex());
+        if (unionIndex148 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, null);
+        } else {
+            if (unionIndex148 == 1) {
+                Utf8 charSequence148;
+                Object oldString148 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(148);
+                if (oldString148 instanceof Utf8) {
+                    charSequence148 = (decoder).readString(((Utf8) oldString148));
+                } else {
+                    charSequence148 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, charSequence148);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F148': "+ unionIndex148));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex149 = (decoder.readIndex());
+        if (unionIndex149 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, null);
+        } else {
+            if (unionIndex149 == 1) {
+                Utf8 charSequence149;
+                Object oldString149 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(149);
+                if (oldString149 instanceof Utf8) {
+                    charSequence149 = (decoder).readString(((Utf8) oldString149));
+                } else {
+                    charSequence149 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, charSequence149);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F149': "+ unionIndex149));
+            }
+        }
+        int unionIndex150 = (decoder.readIndex());
+        if (unionIndex150 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, null);
+        } else {
+            if (unionIndex150 == 1) {
+                Utf8 charSequence150;
+                Object oldString150 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(150);
+                if (oldString150 instanceof Utf8) {
+                    charSequence150 = (decoder).readString(((Utf8) oldString150));
+                } else {
+                    charSequence150 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, charSequence150);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F150': "+ unionIndex150));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex151 = (decoder.readIndex());
+        if (unionIndex151 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, null);
+        } else {
+            if (unionIndex151 == 1) {
+                Utf8 charSequence151;
+                Object oldString151 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(151);
+                if (oldString151 instanceof Utf8) {
+                    charSequence151 = (decoder).readString(((Utf8) oldString151));
+                } else {
+                    charSequence151 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, charSequence151);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F151': "+ unionIndex151));
+            }
+        }
+        int unionIndex152 = (decoder.readIndex());
+        if (unionIndex152 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, null);
+        } else {
+            if (unionIndex152 == 1) {
+                Utf8 charSequence152;
+                Object oldString152 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(152);
+                if (oldString152 instanceof Utf8) {
+                    charSequence152 = (decoder).readString(((Utf8) oldString152));
+                } else {
+                    charSequence152 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, charSequence152);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F152': "+ unionIndex152));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex153 = (decoder.readIndex());
+        if (unionIndex153 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, null);
+        } else {
+            if (unionIndex153 == 1) {
+                Utf8 charSequence153;
+                Object oldString153 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(153);
+                if (oldString153 instanceof Utf8) {
+                    charSequence153 = (decoder).readString(((Utf8) oldString153));
+                } else {
+                    charSequence153 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, charSequence153);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F153': "+ unionIndex153));
+            }
+        }
+        int unionIndex154 = (decoder.readIndex());
+        if (unionIndex154 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, null);
+        } else {
+            if (unionIndex154 == 1) {
+                Utf8 charSequence154;
+                Object oldString154 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(154);
+                if (oldString154 instanceof Utf8) {
+                    charSequence154 = (decoder).readString(((Utf8) oldString154));
+                } else {
+                    charSequence154 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, charSequence154);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F154': "+ unionIndex154));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex155 = (decoder.readIndex());
+        if (unionIndex155 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, null);
+        } else {
+            if (unionIndex155 == 1) {
+                Utf8 charSequence155;
+                Object oldString155 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(155);
+                if (oldString155 instanceof Utf8) {
+                    charSequence155 = (decoder).readString(((Utf8) oldString155));
+                } else {
+                    charSequence155 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, charSequence155);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F155': "+ unionIndex155));
+            }
+        }
+        int unionIndex156 = (decoder.readIndex());
+        if (unionIndex156 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, null);
+        } else {
+            if (unionIndex156 == 1) {
+                Utf8 charSequence156;
+                Object oldString156 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(156);
+                if (oldString156 instanceof Utf8) {
+                    charSequence156 = (decoder).readString(((Utf8) oldString156));
+                } else {
+                    charSequence156 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, charSequence156);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F156': "+ unionIndex156));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex157 = (decoder.readIndex());
+        if (unionIndex157 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, null);
+        } else {
+            if (unionIndex157 == 1) {
+                Utf8 charSequence157;
+                Object oldString157 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(157);
+                if (oldString157 instanceof Utf8) {
+                    charSequence157 = (decoder).readString(((Utf8) oldString157));
+                } else {
+                    charSequence157 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, charSequence157);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F157': "+ unionIndex157));
+            }
+        }
+        int unionIndex158 = (decoder.readIndex());
+        if (unionIndex158 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, null);
+        } else {
+            if (unionIndex158 == 1) {
+                Utf8 charSequence158;
+                Object oldString158 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(158);
+                if (oldString158 instanceof Utf8) {
+                    charSequence158 = (decoder).readString(((Utf8) oldString158));
+                } else {
+                    charSequence158 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, charSequence158);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F158': "+ unionIndex158));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex159 = (decoder.readIndex());
+        if (unionIndex159 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, null);
+        } else {
+            if (unionIndex159 == 1) {
+                Utf8 charSequence159;
+                Object oldString159 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(159);
+                if (oldString159 instanceof Utf8) {
+                    charSequence159 = (decoder).readString(((Utf8) oldString159));
+                } else {
+                    charSequence159 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, charSequence159);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F159': "+ unionIndex159));
+            }
+        }
+        int unionIndex160 = (decoder.readIndex());
+        if (unionIndex160 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, null);
+        } else {
+            if (unionIndex160 == 1) {
+                Utf8 charSequence160;
+                Object oldString160 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(160);
+                if (oldString160 instanceof Utf8) {
+                    charSequence160 = (decoder).readString(((Utf8) oldString160));
+                } else {
+                    charSequence160 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, charSequence160);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F160': "+ unionIndex160));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex161 = (decoder.readIndex());
+        if (unionIndex161 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, null);
+        } else {
+            if (unionIndex161 == 1) {
+                Utf8 charSequence161;
+                Object oldString161 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(161);
+                if (oldString161 instanceof Utf8) {
+                    charSequence161 = (decoder).readString(((Utf8) oldString161));
+                } else {
+                    charSequence161 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, charSequence161);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F161': "+ unionIndex161));
+            }
+        }
+        int unionIndex162 = (decoder.readIndex());
+        if (unionIndex162 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, null);
+        } else {
+            if (unionIndex162 == 1) {
+                Utf8 charSequence162;
+                Object oldString162 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(162);
+                if (oldString162 instanceof Utf8) {
+                    charSequence162 = (decoder).readString(((Utf8) oldString162));
+                } else {
+                    charSequence162 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, charSequence162);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F162': "+ unionIndex162));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex163 = (decoder.readIndex());
+        if (unionIndex163 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, null);
+        } else {
+            if (unionIndex163 == 1) {
+                Utf8 charSequence163;
+                Object oldString163 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(163);
+                if (oldString163 instanceof Utf8) {
+                    charSequence163 = (decoder).readString(((Utf8) oldString163));
+                } else {
+                    charSequence163 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, charSequence163);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F163': "+ unionIndex163));
+            }
+        }
+        int unionIndex164 = (decoder.readIndex());
+        if (unionIndex164 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, null);
+        } else {
+            if (unionIndex164 == 1) {
+                Utf8 charSequence164;
+                Object oldString164 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(164);
+                if (oldString164 instanceof Utf8) {
+                    charSequence164 = (decoder).readString(((Utf8) oldString164));
+                } else {
+                    charSequence164 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, charSequence164);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F164': "+ unionIndex164));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex165 = (decoder.readIndex());
+        if (unionIndex165 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, null);
+        } else {
+            if (unionIndex165 == 1) {
+                Utf8 charSequence165;
+                Object oldString165 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(165);
+                if (oldString165 instanceof Utf8) {
+                    charSequence165 = (decoder).readString(((Utf8) oldString165));
+                } else {
+                    charSequence165 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, charSequence165);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F165': "+ unionIndex165));
+            }
+        }
+        int unionIndex166 = (decoder.readIndex());
+        if (unionIndex166 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, null);
+        } else {
+            if (unionIndex166 == 1) {
+                Utf8 charSequence166;
+                Object oldString166 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(166);
+                if (oldString166 instanceof Utf8) {
+                    charSequence166 = (decoder).readString(((Utf8) oldString166));
+                } else {
+                    charSequence166 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, charSequence166);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F166': "+ unionIndex166));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex167 = (decoder.readIndex());
+        if (unionIndex167 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, null);
+        } else {
+            if (unionIndex167 == 1) {
+                Utf8 charSequence167;
+                Object oldString167 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(167);
+                if (oldString167 instanceof Utf8) {
+                    charSequence167 = (decoder).readString(((Utf8) oldString167));
+                } else {
+                    charSequence167 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, charSequence167);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F167': "+ unionIndex167));
+            }
+        }
+        int unionIndex168 = (decoder.readIndex());
+        if (unionIndex168 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, null);
+        } else {
+            if (unionIndex168 == 1) {
+                Utf8 charSequence168;
+                Object oldString168 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(168);
+                if (oldString168 instanceof Utf8) {
+                    charSequence168 = (decoder).readString(((Utf8) oldString168));
+                } else {
+                    charSequence168 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, charSequence168);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F168': "+ unionIndex168));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex169 = (decoder.readIndex());
+        if (unionIndex169 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, null);
+        } else {
+            if (unionIndex169 == 1) {
+                Utf8 charSequence169;
+                Object oldString169 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(169);
+                if (oldString169 instanceof Utf8) {
+                    charSequence169 = (decoder).readString(((Utf8) oldString169));
+                } else {
+                    charSequence169 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, charSequence169);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F169': "+ unionIndex169));
+            }
+        }
+        int unionIndex170 = (decoder.readIndex());
+        if (unionIndex170 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, null);
+        } else {
+            if (unionIndex170 == 1) {
+                Utf8 charSequence170;
+                Object oldString170 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(170);
+                if (oldString170 instanceof Utf8) {
+                    charSequence170 = (decoder).readString(((Utf8) oldString170));
+                } else {
+                    charSequence170 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, charSequence170);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F170': "+ unionIndex170));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex171 = (decoder.readIndex());
+        if (unionIndex171 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, null);
+        } else {
+            if (unionIndex171 == 1) {
+                Utf8 charSequence171;
+                Object oldString171 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(171);
+                if (oldString171 instanceof Utf8) {
+                    charSequence171 = (decoder).readString(((Utf8) oldString171));
+                } else {
+                    charSequence171 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, charSequence171);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F171': "+ unionIndex171));
+            }
+        }
+        int unionIndex172 = (decoder.readIndex());
+        if (unionIndex172 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, null);
+        } else {
+            if (unionIndex172 == 1) {
+                Utf8 charSequence172;
+                Object oldString172 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(172);
+                if (oldString172 instanceof Utf8) {
+                    charSequence172 = (decoder).readString(((Utf8) oldString172));
+                } else {
+                    charSequence172 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, charSequence172);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F172': "+ unionIndex172));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex173 = (decoder.readIndex());
+        if (unionIndex173 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, null);
+        } else {
+            if (unionIndex173 == 1) {
+                Utf8 charSequence173;
+                Object oldString173 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(173);
+                if (oldString173 instanceof Utf8) {
+                    charSequence173 = (decoder).readString(((Utf8) oldString173));
+                } else {
+                    charSequence173 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, charSequence173);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F173': "+ unionIndex173));
+            }
+        }
+        int unionIndex174 = (decoder.readIndex());
+        if (unionIndex174 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, null);
+        } else {
+            if (unionIndex174 == 1) {
+                Utf8 charSequence174;
+                Object oldString174 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(174);
+                if (oldString174 instanceof Utf8) {
+                    charSequence174 = (decoder).readString(((Utf8) oldString174));
+                } else {
+                    charSequence174 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, charSequence174);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F174': "+ unionIndex174));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex175 = (decoder.readIndex());
+        if (unionIndex175 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, null);
+        } else {
+            if (unionIndex175 == 1) {
+                Utf8 charSequence175;
+                Object oldString175 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(175);
+                if (oldString175 instanceof Utf8) {
+                    charSequence175 = (decoder).readString(((Utf8) oldString175));
+                } else {
+                    charSequence175 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, charSequence175);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F175': "+ unionIndex175));
+            }
+        }
+        int unionIndex176 = (decoder.readIndex());
+        if (unionIndex176 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, null);
+        } else {
+            if (unionIndex176 == 1) {
+                Utf8 charSequence176;
+                Object oldString176 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(176);
+                if (oldString176 instanceof Utf8) {
+                    charSequence176 = (decoder).readString(((Utf8) oldString176));
+                } else {
+                    charSequence176 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, charSequence176);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F176': "+ unionIndex176));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex177 = (decoder.readIndex());
+        if (unionIndex177 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, null);
+        } else {
+            if (unionIndex177 == 1) {
+                Utf8 charSequence177;
+                Object oldString177 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(177);
+                if (oldString177 instanceof Utf8) {
+                    charSequence177 = (decoder).readString(((Utf8) oldString177));
+                } else {
+                    charSequence177 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, charSequence177);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F177': "+ unionIndex177));
+            }
+        }
+        int unionIndex178 = (decoder.readIndex());
+        if (unionIndex178 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, null);
+        } else {
+            if (unionIndex178 == 1) {
+                Utf8 charSequence178;
+                Object oldString178 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(178);
+                if (oldString178 instanceof Utf8) {
+                    charSequence178 = (decoder).readString(((Utf8) oldString178));
+                } else {
+                    charSequence178 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, charSequence178);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F178': "+ unionIndex178));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex179 = (decoder.readIndex());
+        if (unionIndex179 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, null);
+        } else {
+            if (unionIndex179 == 1) {
+                Utf8 charSequence179;
+                Object oldString179 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(179);
+                if (oldString179 instanceof Utf8) {
+                    charSequence179 = (decoder).readString(((Utf8) oldString179));
+                } else {
+                    charSequence179 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, charSequence179);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F179': "+ unionIndex179));
+            }
+        }
+        int unionIndex180 = (decoder.readIndex());
+        if (unionIndex180 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, null);
+        } else {
+            if (unionIndex180 == 1) {
+                Utf8 charSequence180;
+                Object oldString180 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(180);
+                if (oldString180 instanceof Utf8) {
+                    charSequence180 = (decoder).readString(((Utf8) oldString180));
+                } else {
+                    charSequence180 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, charSequence180);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F180': "+ unionIndex180));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex181 = (decoder.readIndex());
+        if (unionIndex181 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, null);
+        } else {
+            if (unionIndex181 == 1) {
+                Utf8 charSequence181;
+                Object oldString181 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(181);
+                if (oldString181 instanceof Utf8) {
+                    charSequence181 = (decoder).readString(((Utf8) oldString181));
+                } else {
+                    charSequence181 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, charSequence181);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F181': "+ unionIndex181));
+            }
+        }
+        int unionIndex182 = (decoder.readIndex());
+        if (unionIndex182 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, null);
+        } else {
+            if (unionIndex182 == 1) {
+                Utf8 charSequence182;
+                Object oldString182 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(182);
+                if (oldString182 instanceof Utf8) {
+                    charSequence182 = (decoder).readString(((Utf8) oldString182));
+                } else {
+                    charSequence182 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, charSequence182);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F182': "+ unionIndex182));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex183 = (decoder.readIndex());
+        if (unionIndex183 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, null);
+        } else {
+            if (unionIndex183 == 1) {
+                Utf8 charSequence183;
+                Object oldString183 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(183);
+                if (oldString183 instanceof Utf8) {
+                    charSequence183 = (decoder).readString(((Utf8) oldString183));
+                } else {
+                    charSequence183 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, charSequence183);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F183': "+ unionIndex183));
+            }
+        }
+        int unionIndex184 = (decoder.readIndex());
+        if (unionIndex184 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, null);
+        } else {
+            if (unionIndex184 == 1) {
+                Utf8 charSequence184;
+                Object oldString184 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(184);
+                if (oldString184 instanceof Utf8) {
+                    charSequence184 = (decoder).readString(((Utf8) oldString184));
+                } else {
+                    charSequence184 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, charSequence184);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F184': "+ unionIndex184));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex185 = (decoder.readIndex());
+        if (unionIndex185 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, null);
+        } else {
+            if (unionIndex185 == 1) {
+                Utf8 charSequence185;
+                Object oldString185 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(185);
+                if (oldString185 instanceof Utf8) {
+                    charSequence185 = (decoder).readString(((Utf8) oldString185));
+                } else {
+                    charSequence185 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, charSequence185);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F185': "+ unionIndex185));
+            }
+        }
+        int unionIndex186 = (decoder.readIndex());
+        if (unionIndex186 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, null);
+        } else {
+            if (unionIndex186 == 1) {
+                Utf8 charSequence186;
+                Object oldString186 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(186);
+                if (oldString186 instanceof Utf8) {
+                    charSequence186 = (decoder).readString(((Utf8) oldString186));
+                } else {
+                    charSequence186 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, charSequence186);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F186': "+ unionIndex186));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex187 = (decoder.readIndex());
+        if (unionIndex187 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, null);
+        } else {
+            if (unionIndex187 == 1) {
+                Utf8 charSequence187;
+                Object oldString187 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(187);
+                if (oldString187 instanceof Utf8) {
+                    charSequence187 = (decoder).readString(((Utf8) oldString187));
+                } else {
+                    charSequence187 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, charSequence187);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F187': "+ unionIndex187));
+            }
+        }
+        int unionIndex188 = (decoder.readIndex());
+        if (unionIndex188 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, null);
+        } else {
+            if (unionIndex188 == 1) {
+                Utf8 charSequence188;
+                Object oldString188 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(188);
+                if (oldString188 instanceof Utf8) {
+                    charSequence188 = (decoder).readString(((Utf8) oldString188));
+                } else {
+                    charSequence188 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, charSequence188);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F188': "+ unionIndex188));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex189 = (decoder.readIndex());
+        if (unionIndex189 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, null);
+        } else {
+            if (unionIndex189 == 1) {
+                Utf8 charSequence189;
+                Object oldString189 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(189);
+                if (oldString189 instanceof Utf8) {
+                    charSequence189 = (decoder).readString(((Utf8) oldString189));
+                } else {
+                    charSequence189 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, charSequence189);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F189': "+ unionIndex189));
+            }
+        }
+        int unionIndex190 = (decoder.readIndex());
+        if (unionIndex190 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, null);
+        } else {
+            if (unionIndex190 == 1) {
+                Utf8 charSequence190;
+                Object oldString190 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(190);
+                if (oldString190 instanceof Utf8) {
+                    charSequence190 = (decoder).readString(((Utf8) oldString190));
+                } else {
+                    charSequence190 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, charSequence190);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F190': "+ unionIndex190));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex191 = (decoder.readIndex());
+        if (unionIndex191 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, null);
+        } else {
+            if (unionIndex191 == 1) {
+                Utf8 charSequence191;
+                Object oldString191 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(191);
+                if (oldString191 instanceof Utf8) {
+                    charSequence191 = (decoder).readString(((Utf8) oldString191));
+                } else {
+                    charSequence191 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, charSequence191);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F191': "+ unionIndex191));
+            }
+        }
+        int unionIndex192 = (decoder.readIndex());
+        if (unionIndex192 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, null);
+        } else {
+            if (unionIndex192 == 1) {
+                Utf8 charSequence192;
+                Object oldString192 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(192);
+                if (oldString192 instanceof Utf8) {
+                    charSequence192 = (decoder).readString(((Utf8) oldString192));
+                } else {
+                    charSequence192 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, charSequence192);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F192': "+ unionIndex192));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex193 = (decoder.readIndex());
+        if (unionIndex193 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, null);
+        } else {
+            if (unionIndex193 == 1) {
+                Utf8 charSequence193;
+                Object oldString193 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(193);
+                if (oldString193 instanceof Utf8) {
+                    charSequence193 = (decoder).readString(((Utf8) oldString193));
+                } else {
+                    charSequence193 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, charSequence193);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F193': "+ unionIndex193));
+            }
+        }
+        int unionIndex194 = (decoder.readIndex());
+        if (unionIndex194 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, null);
+        } else {
+            if (unionIndex194 == 1) {
+                Utf8 charSequence194;
+                Object oldString194 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(194);
+                if (oldString194 instanceof Utf8) {
+                    charSequence194 = (decoder).readString(((Utf8) oldString194));
+                } else {
+                    charSequence194 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, charSequence194);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F194': "+ unionIndex194));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex195 = (decoder.readIndex());
+        if (unionIndex195 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, null);
+        } else {
+            if (unionIndex195 == 1) {
+                Utf8 charSequence195;
+                Object oldString195 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(195);
+                if (oldString195 instanceof Utf8) {
+                    charSequence195 = (decoder).readString(((Utf8) oldString195));
+                } else {
+                    charSequence195 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, charSequence195);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F195': "+ unionIndex195));
+            }
+        }
+        int unionIndex196 = (decoder.readIndex());
+        if (unionIndex196 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, null);
+        } else {
+            if (unionIndex196 == 1) {
+                Utf8 charSequence196;
+                Object oldString196 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(196);
+                if (oldString196 instanceof Utf8) {
+                    charSequence196 = (decoder).readString(((Utf8) oldString196));
+                } else {
+                    charSequence196 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, charSequence196);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F196': "+ unionIndex196));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex197 = (decoder.readIndex());
+        if (unionIndex197 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, null);
+        } else {
+            if (unionIndex197 == 1) {
+                Utf8 charSequence197;
+                Object oldString197 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(197);
+                if (oldString197 instanceof Utf8) {
+                    charSequence197 = (decoder).readString(((Utf8) oldString197));
+                } else {
+                    charSequence197 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, charSequence197);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F197': "+ unionIndex197));
+            }
+        }
+        int unionIndex198 = (decoder.readIndex());
+        if (unionIndex198 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, null);
+        } else {
+            if (unionIndex198 == 1) {
+                Utf8 charSequence198;
+                Object oldString198 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(198);
+                if (oldString198 instanceof Utf8) {
+                    charSequence198 = (decoder).readString(((Utf8) oldString198));
+                } else {
+                    charSequence198 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, charSequence198);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F198': "+ unionIndex198));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex199 = (decoder.readIndex());
+        if (unionIndex199 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, null);
+        } else {
+            if (unionIndex199 == 1) {
+                Utf8 charSequence199;
+                Object oldString199 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(199);
+                if (oldString199 instanceof Utf8) {
+                    charSequence199 = (decoder).readString(((Utf8) oldString199));
+                } else {
+                    charSequence199 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, charSequence199);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F199': "+ unionIndex199));
+            }
+        }
+        int unionIndex200 = (decoder.readIndex());
+        if (unionIndex200 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, null);
+        } else {
+            if (unionIndex200 == 1) {
+                Utf8 charSequence200;
+                Object oldString200 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(200);
+                if (oldString200 instanceof Utf8) {
+                    charSequence200 = (decoder).readString(((Utf8) oldString200));
+                } else {
+                    charSequence200 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, charSequence200);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F200': "+ unionIndex200));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex201 = (decoder.readIndex());
+        if (unionIndex201 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, null);
+        } else {
+            if (unionIndex201 == 1) {
+                Utf8 charSequence201;
+                Object oldString201 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(201);
+                if (oldString201 instanceof Utf8) {
+                    charSequence201 = (decoder).readString(((Utf8) oldString201));
+                } else {
+                    charSequence201 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, charSequence201);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F201': "+ unionIndex201));
+            }
+        }
+        int unionIndex202 = (decoder.readIndex());
+        if (unionIndex202 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, null);
+        } else {
+            if (unionIndex202 == 1) {
+                Utf8 charSequence202;
+                Object oldString202 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(202);
+                if (oldString202 instanceof Utf8) {
+                    charSequence202 = (decoder).readString(((Utf8) oldString202));
+                } else {
+                    charSequence202 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, charSequence202);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F202': "+ unionIndex202));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex203 = (decoder.readIndex());
+        if (unionIndex203 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, null);
+        } else {
+            if (unionIndex203 == 1) {
+                Utf8 charSequence203;
+                Object oldString203 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(203);
+                if (oldString203 instanceof Utf8) {
+                    charSequence203 = (decoder).readString(((Utf8) oldString203));
+                } else {
+                    charSequence203 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, charSequence203);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F203': "+ unionIndex203));
+            }
+        }
+        int unionIndex204 = (decoder.readIndex());
+        if (unionIndex204 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, null);
+        } else {
+            if (unionIndex204 == 1) {
+                Utf8 charSequence204;
+                Object oldString204 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(204);
+                if (oldString204 instanceof Utf8) {
+                    charSequence204 = (decoder).readString(((Utf8) oldString204));
+                } else {
+                    charSequence204 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, charSequence204);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F204': "+ unionIndex204));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex205 = (decoder.readIndex());
+        if (unionIndex205 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, null);
+        } else {
+            if (unionIndex205 == 1) {
+                Utf8 charSequence205;
+                Object oldString205 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(205);
+                if (oldString205 instanceof Utf8) {
+                    charSequence205 = (decoder).readString(((Utf8) oldString205));
+                } else {
+                    charSequence205 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, charSequence205);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F205': "+ unionIndex205));
+            }
+        }
+        int unionIndex206 = (decoder.readIndex());
+        if (unionIndex206 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, null);
+        } else {
+            if (unionIndex206 == 1) {
+                Utf8 charSequence206;
+                Object oldString206 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(206);
+                if (oldString206 instanceof Utf8) {
+                    charSequence206 = (decoder).readString(((Utf8) oldString206));
+                } else {
+                    charSequence206 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, charSequence206);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F206': "+ unionIndex206));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex207 = (decoder.readIndex());
+        if (unionIndex207 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, null);
+        } else {
+            if (unionIndex207 == 1) {
+                Utf8 charSequence207;
+                Object oldString207 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(207);
+                if (oldString207 instanceof Utf8) {
+                    charSequence207 = (decoder).readString(((Utf8) oldString207));
+                } else {
+                    charSequence207 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, charSequence207);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F207': "+ unionIndex207));
+            }
+        }
+        int unionIndex208 = (decoder.readIndex());
+        if (unionIndex208 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, null);
+        } else {
+            if (unionIndex208 == 1) {
+                Utf8 charSequence208;
+                Object oldString208 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(208);
+                if (oldString208 instanceof Utf8) {
+                    charSequence208 = (decoder).readString(((Utf8) oldString208));
+                } else {
+                    charSequence208 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, charSequence208);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F208': "+ unionIndex208));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex209 = (decoder.readIndex());
+        if (unionIndex209 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, null);
+        } else {
+            if (unionIndex209 == 1) {
+                Utf8 charSequence209;
+                Object oldString209 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(209);
+                if (oldString209 instanceof Utf8) {
+                    charSequence209 = (decoder).readString(((Utf8) oldString209));
+                } else {
+                    charSequence209 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, charSequence209);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F209': "+ unionIndex209));
+            }
+        }
+        int unionIndex210 = (decoder.readIndex());
+        if (unionIndex210 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, null);
+        } else {
+            if (unionIndex210 == 1) {
+                Utf8 charSequence210;
+                Object oldString210 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(210);
+                if (oldString210 instanceof Utf8) {
+                    charSequence210 = (decoder).readString(((Utf8) oldString210));
+                } else {
+                    charSequence210 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, charSequence210);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F210': "+ unionIndex210));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex211 = (decoder.readIndex());
+        if (unionIndex211 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, null);
+        } else {
+            if (unionIndex211 == 1) {
+                Utf8 charSequence211;
+                Object oldString211 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(211);
+                if (oldString211 instanceof Utf8) {
+                    charSequence211 = (decoder).readString(((Utf8) oldString211));
+                } else {
+                    charSequence211 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, charSequence211);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F211': "+ unionIndex211));
+            }
+        }
+        int unionIndex212 = (decoder.readIndex());
+        if (unionIndex212 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, null);
+        } else {
+            if (unionIndex212 == 1) {
+                Utf8 charSequence212;
+                Object oldString212 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(212);
+                if (oldString212 instanceof Utf8) {
+                    charSequence212 = (decoder).readString(((Utf8) oldString212));
+                } else {
+                    charSequence212 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, charSequence212);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F212': "+ unionIndex212));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex213 = (decoder.readIndex());
+        if (unionIndex213 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, null);
+        } else {
+            if (unionIndex213 == 1) {
+                Utf8 charSequence213;
+                Object oldString213 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(213);
+                if (oldString213 instanceof Utf8) {
+                    charSequence213 = (decoder).readString(((Utf8) oldString213));
+                } else {
+                    charSequence213 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, charSequence213);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F213': "+ unionIndex213));
+            }
+        }
+        int unionIndex214 = (decoder.readIndex());
+        if (unionIndex214 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, null);
+        } else {
+            if (unionIndex214 == 1) {
+                Utf8 charSequence214;
+                Object oldString214 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(214);
+                if (oldString214 instanceof Utf8) {
+                    charSequence214 = (decoder).readString(((Utf8) oldString214));
+                } else {
+                    charSequence214 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, charSequence214);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F214': "+ unionIndex214));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex215 = (decoder.readIndex());
+        if (unionIndex215 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, null);
+        } else {
+            if (unionIndex215 == 1) {
+                Utf8 charSequence215;
+                Object oldString215 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(215);
+                if (oldString215 instanceof Utf8) {
+                    charSequence215 = (decoder).readString(((Utf8) oldString215));
+                } else {
+                    charSequence215 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, charSequence215);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F215': "+ unionIndex215));
+            }
+        }
+        int unionIndex216 = (decoder.readIndex());
+        if (unionIndex216 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, null);
+        } else {
+            if (unionIndex216 == 1) {
+                Utf8 charSequence216;
+                Object oldString216 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(216);
+                if (oldString216 instanceof Utf8) {
+                    charSequence216 = (decoder).readString(((Utf8) oldString216));
+                } else {
+                    charSequence216 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, charSequence216);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F216': "+ unionIndex216));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex217 = (decoder.readIndex());
+        if (unionIndex217 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, null);
+        } else {
+            if (unionIndex217 == 1) {
+                Utf8 charSequence217;
+                Object oldString217 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(217);
+                if (oldString217 instanceof Utf8) {
+                    charSequence217 = (decoder).readString(((Utf8) oldString217));
+                } else {
+                    charSequence217 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, charSequence217);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F217': "+ unionIndex217));
+            }
+        }
+        int unionIndex218 = (decoder.readIndex());
+        if (unionIndex218 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, null);
+        } else {
+            if (unionIndex218 == 1) {
+                Utf8 charSequence218;
+                Object oldString218 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(218);
+                if (oldString218 instanceof Utf8) {
+                    charSequence218 = (decoder).readString(((Utf8) oldString218));
+                } else {
+                    charSequence218 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, charSequence218);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F218': "+ unionIndex218));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex219 = (decoder.readIndex());
+        if (unionIndex219 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, null);
+        } else {
+            if (unionIndex219 == 1) {
+                Utf8 charSequence219;
+                Object oldString219 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(219);
+                if (oldString219 instanceof Utf8) {
+                    charSequence219 = (decoder).readString(((Utf8) oldString219));
+                } else {
+                    charSequence219 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, charSequence219);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F219': "+ unionIndex219));
+            }
+        }
+        int unionIndex220 = (decoder.readIndex());
+        if (unionIndex220 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, null);
+        } else {
+            if (unionIndex220 == 1) {
+                Utf8 charSequence220;
+                Object oldString220 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(220);
+                if (oldString220 instanceof Utf8) {
+                    charSequence220 = (decoder).readString(((Utf8) oldString220));
+                } else {
+                    charSequence220 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, charSequence220);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F220': "+ unionIndex220));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex221 = (decoder.readIndex());
+        if (unionIndex221 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, null);
+        } else {
+            if (unionIndex221 == 1) {
+                Utf8 charSequence221;
+                Object oldString221 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(221);
+                if (oldString221 instanceof Utf8) {
+                    charSequence221 = (decoder).readString(((Utf8) oldString221));
+                } else {
+                    charSequence221 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, charSequence221);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F221': "+ unionIndex221));
+            }
+        }
+        int unionIndex222 = (decoder.readIndex());
+        if (unionIndex222 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, null);
+        } else {
+            if (unionIndex222 == 1) {
+                Utf8 charSequence222;
+                Object oldString222 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(222);
+                if (oldString222 instanceof Utf8) {
+                    charSequence222 = (decoder).readString(((Utf8) oldString222));
+                } else {
+                    charSequence222 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, charSequence222);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F222': "+ unionIndex222));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex223 = (decoder.readIndex());
+        if (unionIndex223 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, null);
+        } else {
+            if (unionIndex223 == 1) {
+                Utf8 charSequence223;
+                Object oldString223 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(223);
+                if (oldString223 instanceof Utf8) {
+                    charSequence223 = (decoder).readString(((Utf8) oldString223));
+                } else {
+                    charSequence223 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, charSequence223);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F223': "+ unionIndex223));
+            }
+        }
+        int unionIndex224 = (decoder.readIndex());
+        if (unionIndex224 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, null);
+        } else {
+            if (unionIndex224 == 1) {
+                Utf8 charSequence224;
+                Object oldString224 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(224);
+                if (oldString224 instanceof Utf8) {
+                    charSequence224 = (decoder).readString(((Utf8) oldString224));
+                } else {
+                    charSequence224 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, charSequence224);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F224': "+ unionIndex224));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex225 = (decoder.readIndex());
+        if (unionIndex225 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, null);
+        } else {
+            if (unionIndex225 == 1) {
+                Utf8 charSequence225;
+                Object oldString225 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(225);
+                if (oldString225 instanceof Utf8) {
+                    charSequence225 = (decoder).readString(((Utf8) oldString225));
+                } else {
+                    charSequence225 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, charSequence225);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F225': "+ unionIndex225));
+            }
+        }
+        int unionIndex226 = (decoder.readIndex());
+        if (unionIndex226 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, null);
+        } else {
+            if (unionIndex226 == 1) {
+                Utf8 charSequence226;
+                Object oldString226 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(226);
+                if (oldString226 instanceof Utf8) {
+                    charSequence226 = (decoder).readString(((Utf8) oldString226));
+                } else {
+                    charSequence226 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, charSequence226);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F226': "+ unionIndex226));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex227 = (decoder.readIndex());
+        if (unionIndex227 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, null);
+        } else {
+            if (unionIndex227 == 1) {
+                Utf8 charSequence227;
+                Object oldString227 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(227);
+                if (oldString227 instanceof Utf8) {
+                    charSequence227 = (decoder).readString(((Utf8) oldString227));
+                } else {
+                    charSequence227 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, charSequence227);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F227': "+ unionIndex227));
+            }
+        }
+        int unionIndex228 = (decoder.readIndex());
+        if (unionIndex228 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, null);
+        } else {
+            if (unionIndex228 == 1) {
+                Utf8 charSequence228;
+                Object oldString228 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(228);
+                if (oldString228 instanceof Utf8) {
+                    charSequence228 = (decoder).readString(((Utf8) oldString228));
+                } else {
+                    charSequence228 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, charSequence228);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F228': "+ unionIndex228));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex229 = (decoder.readIndex());
+        if (unionIndex229 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, null);
+        } else {
+            if (unionIndex229 == 1) {
+                Utf8 charSequence229;
+                Object oldString229 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(229);
+                if (oldString229 instanceof Utf8) {
+                    charSequence229 = (decoder).readString(((Utf8) oldString229));
+                } else {
+                    charSequence229 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, charSequence229);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F229': "+ unionIndex229));
+            }
+        }
+        int unionIndex230 = (decoder.readIndex());
+        if (unionIndex230 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, null);
+        } else {
+            if (unionIndex230 == 1) {
+                Utf8 charSequence230;
+                Object oldString230 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(230);
+                if (oldString230 instanceof Utf8) {
+                    charSequence230 = (decoder).readString(((Utf8) oldString230));
+                } else {
+                    charSequence230 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, charSequence230);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F230': "+ unionIndex230));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex231 = (decoder.readIndex());
+        if (unionIndex231 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, null);
+        } else {
+            if (unionIndex231 == 1) {
+                Utf8 charSequence231;
+                Object oldString231 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(231);
+                if (oldString231 instanceof Utf8) {
+                    charSequence231 = (decoder).readString(((Utf8) oldString231));
+                } else {
+                    charSequence231 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, charSequence231);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F231': "+ unionIndex231));
+            }
+        }
+        int unionIndex232 = (decoder.readIndex());
+        if (unionIndex232 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, null);
+        } else {
+            if (unionIndex232 == 1) {
+                Utf8 charSequence232;
+                Object oldString232 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(232);
+                if (oldString232 instanceof Utf8) {
+                    charSequence232 = (decoder).readString(((Utf8) oldString232));
+                } else {
+                    charSequence232 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, charSequence232);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F232': "+ unionIndex232));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex233 = (decoder.readIndex());
+        if (unionIndex233 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, null);
+        } else {
+            if (unionIndex233 == 1) {
+                Utf8 charSequence233;
+                Object oldString233 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(233);
+                if (oldString233 instanceof Utf8) {
+                    charSequence233 = (decoder).readString(((Utf8) oldString233));
+                } else {
+                    charSequence233 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, charSequence233);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F233': "+ unionIndex233));
+            }
+        }
+        int unionIndex234 = (decoder.readIndex());
+        if (unionIndex234 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, null);
+        } else {
+            if (unionIndex234 == 1) {
+                Utf8 charSequence234;
+                Object oldString234 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(234);
+                if (oldString234 instanceof Utf8) {
+                    charSequence234 = (decoder).readString(((Utf8) oldString234));
+                } else {
+                    charSequence234 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, charSequence234);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F234': "+ unionIndex234));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex235 = (decoder.readIndex());
+        if (unionIndex235 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, null);
+        } else {
+            if (unionIndex235 == 1) {
+                Utf8 charSequence235;
+                Object oldString235 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(235);
+                if (oldString235 instanceof Utf8) {
+                    charSequence235 = (decoder).readString(((Utf8) oldString235));
+                } else {
+                    charSequence235 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, charSequence235);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F235': "+ unionIndex235));
+            }
+        }
+        int unionIndex236 = (decoder.readIndex());
+        if (unionIndex236 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, null);
+        } else {
+            if (unionIndex236 == 1) {
+                Utf8 charSequence236;
+                Object oldString236 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(236);
+                if (oldString236 instanceof Utf8) {
+                    charSequence236 = (decoder).readString(((Utf8) oldString236));
+                } else {
+                    charSequence236 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, charSequence236);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F236': "+ unionIndex236));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex237 = (decoder.readIndex());
+        if (unionIndex237 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, null);
+        } else {
+            if (unionIndex237 == 1) {
+                Utf8 charSequence237;
+                Object oldString237 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(237);
+                if (oldString237 instanceof Utf8) {
+                    charSequence237 = (decoder).readString(((Utf8) oldString237));
+                } else {
+                    charSequence237 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, charSequence237);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F237': "+ unionIndex237));
+            }
+        }
+        int unionIndex238 = (decoder.readIndex());
+        if (unionIndex238 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, null);
+        } else {
+            if (unionIndex238 == 1) {
+                Utf8 charSequence238;
+                Object oldString238 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(238);
+                if (oldString238 instanceof Utf8) {
+                    charSequence238 = (decoder).readString(((Utf8) oldString238));
+                } else {
+                    charSequence238 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, charSequence238);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F238': "+ unionIndex238));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex239 = (decoder.readIndex());
+        if (unionIndex239 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, null);
+        } else {
+            if (unionIndex239 == 1) {
+                Utf8 charSequence239;
+                Object oldString239 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(239);
+                if (oldString239 instanceof Utf8) {
+                    charSequence239 = (decoder).readString(((Utf8) oldString239));
+                } else {
+                    charSequence239 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, charSequence239);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F239': "+ unionIndex239));
+            }
+        }
+        int unionIndex240 = (decoder.readIndex());
+        if (unionIndex240 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, null);
+        } else {
+            if (unionIndex240 == 1) {
+                Utf8 charSequence240;
+                Object oldString240 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(240);
+                if (oldString240 instanceof Utf8) {
+                    charSequence240 = (decoder).readString(((Utf8) oldString240));
+                } else {
+                    charSequence240 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, charSequence240);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F240': "+ unionIndex240));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex241 = (decoder.readIndex());
+        if (unionIndex241 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, null);
+        } else {
+            if (unionIndex241 == 1) {
+                Utf8 charSequence241;
+                Object oldString241 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(241);
+                if (oldString241 instanceof Utf8) {
+                    charSequence241 = (decoder).readString(((Utf8) oldString241));
+                } else {
+                    charSequence241 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, charSequence241);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F241': "+ unionIndex241));
+            }
+        }
+        int unionIndex242 = (decoder.readIndex());
+        if (unionIndex242 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, null);
+        } else {
+            if (unionIndex242 == 1) {
+                Utf8 charSequence242;
+                Object oldString242 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(242);
+                if (oldString242 instanceof Utf8) {
+                    charSequence242 = (decoder).readString(((Utf8) oldString242));
+                } else {
+                    charSequence242 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, charSequence242);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F242': "+ unionIndex242));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex243 = (decoder.readIndex());
+        if (unionIndex243 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, null);
+        } else {
+            if (unionIndex243 == 1) {
+                Utf8 charSequence243;
+                Object oldString243 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(243);
+                if (oldString243 instanceof Utf8) {
+                    charSequence243 = (decoder).readString(((Utf8) oldString243));
+                } else {
+                    charSequence243 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, charSequence243);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F243': "+ unionIndex243));
+            }
+        }
+        int unionIndex244 = (decoder.readIndex());
+        if (unionIndex244 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, null);
+        } else {
+            if (unionIndex244 == 1) {
+                Utf8 charSequence244;
+                Object oldString244 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(244);
+                if (oldString244 instanceof Utf8) {
+                    charSequence244 = (decoder).readString(((Utf8) oldString244));
+                } else {
+                    charSequence244 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, charSequence244);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F244': "+ unionIndex244));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex245 = (decoder.readIndex());
+        if (unionIndex245 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, null);
+        } else {
+            if (unionIndex245 == 1) {
+                Utf8 charSequence245;
+                Object oldString245 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(245);
+                if (oldString245 instanceof Utf8) {
+                    charSequence245 = (decoder).readString(((Utf8) oldString245));
+                } else {
+                    charSequence245 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, charSequence245);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F245': "+ unionIndex245));
+            }
+        }
+        int unionIndex246 = (decoder.readIndex());
+        if (unionIndex246 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, null);
+        } else {
+            if (unionIndex246 == 1) {
+                Utf8 charSequence246;
+                Object oldString246 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(246);
+                if (oldString246 instanceof Utf8) {
+                    charSequence246 = (decoder).readString(((Utf8) oldString246));
+                } else {
+                    charSequence246 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, charSequence246);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F246': "+ unionIndex246));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex247 = (decoder.readIndex());
+        if (unionIndex247 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, null);
+        } else {
+            if (unionIndex247 == 1) {
+                Utf8 charSequence247;
+                Object oldString247 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(247);
+                if (oldString247 instanceof Utf8) {
+                    charSequence247 = (decoder).readString(((Utf8) oldString247));
+                } else {
+                    charSequence247 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, charSequence247);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F247': "+ unionIndex247));
+            }
+        }
+        int unionIndex248 = (decoder.readIndex());
+        if (unionIndex248 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, null);
+        } else {
+            if (unionIndex248 == 1) {
+                Utf8 charSequence248;
+                Object oldString248 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(248);
+                if (oldString248 instanceof Utf8) {
+                    charSequence248 = (decoder).readString(((Utf8) oldString248));
+                } else {
+                    charSequence248 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, charSequence248);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F248': "+ unionIndex248));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex249 = (decoder.readIndex());
+        if (unionIndex249 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, null);
+        } else {
+            if (unionIndex249 == 1) {
+                Utf8 charSequence249;
+                Object oldString249 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(249);
+                if (oldString249 instanceof Utf8) {
+                    charSequence249 = (decoder).readString(((Utf8) oldString249));
+                } else {
+                    charSequence249 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, charSequence249);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F249': "+ unionIndex249));
+            }
+        }
+        int unionIndex250 = (decoder.readIndex());
+        if (unionIndex250 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, null);
+        } else {
+            if (unionIndex250 == 1) {
+                Utf8 charSequence250;
+                Object oldString250 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(250);
+                if (oldString250 instanceof Utf8) {
+                    charSequence250 = (decoder).readString(((Utf8) oldString250));
+                } else {
+                    charSequence250 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, charSequence250);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F250': "+ unionIndex250));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex251 = (decoder.readIndex());
+        if (unionIndex251 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, null);
+        } else {
+            if (unionIndex251 == 1) {
+                Utf8 charSequence251;
+                Object oldString251 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(251);
+                if (oldString251 instanceof Utf8) {
+                    charSequence251 = (decoder).readString(((Utf8) oldString251));
+                } else {
+                    charSequence251 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, charSequence251);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F251': "+ unionIndex251));
+            }
+        }
+        int unionIndex252 = (decoder.readIndex());
+        if (unionIndex252 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, null);
+        } else {
+            if (unionIndex252 == 1) {
+                Utf8 charSequence252;
+                Object oldString252 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(252);
+                if (oldString252 instanceof Utf8) {
+                    charSequence252 = (decoder).readString(((Utf8) oldString252));
+                } else {
+                    charSequence252 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, charSequence252);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F252': "+ unionIndex252));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex253 = (decoder.readIndex());
+        if (unionIndex253 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, null);
+        } else {
+            if (unionIndex253 == 1) {
+                Utf8 charSequence253;
+                Object oldString253 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(253);
+                if (oldString253 instanceof Utf8) {
+                    charSequence253 = (decoder).readString(((Utf8) oldString253));
+                } else {
+                    charSequence253 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, charSequence253);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F253': "+ unionIndex253));
+            }
+        }
+        int unionIndex254 = (decoder.readIndex());
+        if (unionIndex254 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, null);
+        } else {
+            if (unionIndex254 == 1) {
+                Utf8 charSequence254;
+                Object oldString254 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(254);
+                if (oldString254 instanceof Utf8) {
+                    charSequence254 = (decoder).readString(((Utf8) oldString254));
+                } else {
+                    charSequence254 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, charSequence254);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F254': "+ unionIndex254));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex255 = (decoder.readIndex());
+        if (unionIndex255 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, null);
+        } else {
+            if (unionIndex255 == 1) {
+                Utf8 charSequence255;
+                Object oldString255 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(255);
+                if (oldString255 instanceof Utf8) {
+                    charSequence255 = (decoder).readString(((Utf8) oldString255));
+                } else {
+                    charSequence255 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, charSequence255);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F255': "+ unionIndex255));
+            }
+        }
+        int unionIndex256 = (decoder.readIndex());
+        if (unionIndex256 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, null);
+        } else {
+            if (unionIndex256 == 1) {
+                Utf8 charSequence256;
+                Object oldString256 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(256);
+                if (oldString256 instanceof Utf8) {
+                    charSequence256 = (decoder).readString(((Utf8) oldString256));
+                } else {
+                    charSequence256 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, charSequence256);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F256': "+ unionIndex256));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex257 = (decoder.readIndex());
+        if (unionIndex257 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, null);
+        } else {
+            if (unionIndex257 == 1) {
+                Utf8 charSequence257;
+                Object oldString257 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(257);
+                if (oldString257 instanceof Utf8) {
+                    charSequence257 = (decoder).readString(((Utf8) oldString257));
+                } else {
+                    charSequence257 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, charSequence257);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F257': "+ unionIndex257));
+            }
+        }
+        int unionIndex258 = (decoder.readIndex());
+        if (unionIndex258 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, null);
+        } else {
+            if (unionIndex258 == 1) {
+                Utf8 charSequence258;
+                Object oldString258 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(258);
+                if (oldString258 instanceof Utf8) {
+                    charSequence258 = (decoder).readString(((Utf8) oldString258));
+                } else {
+                    charSequence258 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, charSequence258);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F258': "+ unionIndex258));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex259 = (decoder.readIndex());
+        if (unionIndex259 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, null);
+        } else {
+            if (unionIndex259 == 1) {
+                Utf8 charSequence259;
+                Object oldString259 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(259);
+                if (oldString259 instanceof Utf8) {
+                    charSequence259 = (decoder).readString(((Utf8) oldString259));
+                } else {
+                    charSequence259 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, charSequence259);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F259': "+ unionIndex259));
+            }
+        }
+        int unionIndex260 = (decoder.readIndex());
+        if (unionIndex260 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, null);
+        } else {
+            if (unionIndex260 == 1) {
+                Utf8 charSequence260;
+                Object oldString260 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(260);
+                if (oldString260 instanceof Utf8) {
+                    charSequence260 = (decoder).readString(((Utf8) oldString260));
+                } else {
+                    charSequence260 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, charSequence260);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F260': "+ unionIndex260));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex261 = (decoder.readIndex());
+        if (unionIndex261 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, null);
+        } else {
+            if (unionIndex261 == 1) {
+                Utf8 charSequence261;
+                Object oldString261 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(261);
+                if (oldString261 instanceof Utf8) {
+                    charSequence261 = (decoder).readString(((Utf8) oldString261));
+                } else {
+                    charSequence261 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, charSequence261);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F261': "+ unionIndex261));
+            }
+        }
+        int unionIndex262 = (decoder.readIndex());
+        if (unionIndex262 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, null);
+        } else {
+            if (unionIndex262 == 1) {
+                Utf8 charSequence262;
+                Object oldString262 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(262);
+                if (oldString262 instanceof Utf8) {
+                    charSequence262 = (decoder).readString(((Utf8) oldString262));
+                } else {
+                    charSequence262 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, charSequence262);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F262': "+ unionIndex262));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex263 = (decoder.readIndex());
+        if (unionIndex263 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, null);
+        } else {
+            if (unionIndex263 == 1) {
+                Utf8 charSequence263;
+                Object oldString263 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(263);
+                if (oldString263 instanceof Utf8) {
+                    charSequence263 = (decoder).readString(((Utf8) oldString263));
+                } else {
+                    charSequence263 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, charSequence263);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F263': "+ unionIndex263));
+            }
+        }
+        int unionIndex264 = (decoder.readIndex());
+        if (unionIndex264 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, null);
+        } else {
+            if (unionIndex264 == 1) {
+                Utf8 charSequence264;
+                Object oldString264 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(264);
+                if (oldString264 instanceof Utf8) {
+                    charSequence264 = (decoder).readString(((Utf8) oldString264));
+                } else {
+                    charSequence264 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, charSequence264);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F264': "+ unionIndex264));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex265 = (decoder.readIndex());
+        if (unionIndex265 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, null);
+        } else {
+            if (unionIndex265 == 1) {
+                Utf8 charSequence265;
+                Object oldString265 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(265);
+                if (oldString265 instanceof Utf8) {
+                    charSequence265 = (decoder).readString(((Utf8) oldString265));
+                } else {
+                    charSequence265 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, charSequence265);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F265': "+ unionIndex265));
+            }
+        }
+        int unionIndex266 = (decoder.readIndex());
+        if (unionIndex266 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, null);
+        } else {
+            if (unionIndex266 == 1) {
+                Utf8 charSequence266;
+                Object oldString266 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(266);
+                if (oldString266 instanceof Utf8) {
+                    charSequence266 = (decoder).readString(((Utf8) oldString266));
+                } else {
+                    charSequence266 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, charSequence266);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F266': "+ unionIndex266));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex267 = (decoder.readIndex());
+        if (unionIndex267 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, null);
+        } else {
+            if (unionIndex267 == 1) {
+                Utf8 charSequence267;
+                Object oldString267 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(267);
+                if (oldString267 instanceof Utf8) {
+                    charSequence267 = (decoder).readString(((Utf8) oldString267));
+                } else {
+                    charSequence267 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, charSequence267);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F267': "+ unionIndex267));
+            }
+        }
+        int unionIndex268 = (decoder.readIndex());
+        if (unionIndex268 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, null);
+        } else {
+            if (unionIndex268 == 1) {
+                Utf8 charSequence268;
+                Object oldString268 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(268);
+                if (oldString268 instanceof Utf8) {
+                    charSequence268 = (decoder).readString(((Utf8) oldString268));
+                } else {
+                    charSequence268 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, charSequence268);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F268': "+ unionIndex268));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex269 = (decoder.readIndex());
+        if (unionIndex269 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, null);
+        } else {
+            if (unionIndex269 == 1) {
+                Utf8 charSequence269;
+                Object oldString269 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(269);
+                if (oldString269 instanceof Utf8) {
+                    charSequence269 = (decoder).readString(((Utf8) oldString269));
+                } else {
+                    charSequence269 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, charSequence269);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F269': "+ unionIndex269));
+            }
+        }
+        int unionIndex270 = (decoder.readIndex());
+        if (unionIndex270 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, null);
+        } else {
+            if (unionIndex270 == 1) {
+                Utf8 charSequence270;
+                Object oldString270 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(270);
+                if (oldString270 instanceof Utf8) {
+                    charSequence270 = (decoder).readString(((Utf8) oldString270));
+                } else {
+                    charSequence270 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, charSequence270);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F270': "+ unionIndex270));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex271 = (decoder.readIndex());
+        if (unionIndex271 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, null);
+        } else {
+            if (unionIndex271 == 1) {
+                Utf8 charSequence271;
+                Object oldString271 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(271);
+                if (oldString271 instanceof Utf8) {
+                    charSequence271 = (decoder).readString(((Utf8) oldString271));
+                } else {
+                    charSequence271 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, charSequence271);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F271': "+ unionIndex271));
+            }
+        }
+        int unionIndex272 = (decoder.readIndex());
+        if (unionIndex272 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, null);
+        } else {
+            if (unionIndex272 == 1) {
+                Utf8 charSequence272;
+                Object oldString272 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(272);
+                if (oldString272 instanceof Utf8) {
+                    charSequence272 = (decoder).readString(((Utf8) oldString272));
+                } else {
+                    charSequence272 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, charSequence272);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F272': "+ unionIndex272));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex273 = (decoder.readIndex());
+        if (unionIndex273 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, null);
+        } else {
+            if (unionIndex273 == 1) {
+                Utf8 charSequence273;
+                Object oldString273 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(273);
+                if (oldString273 instanceof Utf8) {
+                    charSequence273 = (decoder).readString(((Utf8) oldString273));
+                } else {
+                    charSequence273 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, charSequence273);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F273': "+ unionIndex273));
+            }
+        }
+        int unionIndex274 = (decoder.readIndex());
+        if (unionIndex274 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, null);
+        } else {
+            if (unionIndex274 == 1) {
+                Utf8 charSequence274;
+                Object oldString274 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(274);
+                if (oldString274 instanceof Utf8) {
+                    charSequence274 = (decoder).readString(((Utf8) oldString274));
+                } else {
+                    charSequence274 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, charSequence274);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F274': "+ unionIndex274));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex275 = (decoder.readIndex());
+        if (unionIndex275 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, null);
+        } else {
+            if (unionIndex275 == 1) {
+                Utf8 charSequence275;
+                Object oldString275 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(275);
+                if (oldString275 instanceof Utf8) {
+                    charSequence275 = (decoder).readString(((Utf8) oldString275));
+                } else {
+                    charSequence275 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, charSequence275);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F275': "+ unionIndex275));
+            }
+        }
+        int unionIndex276 = (decoder.readIndex());
+        if (unionIndex276 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, null);
+        } else {
+            if (unionIndex276 == 1) {
+                Utf8 charSequence276;
+                Object oldString276 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(276);
+                if (oldString276 instanceof Utf8) {
+                    charSequence276 = (decoder).readString(((Utf8) oldString276));
+                } else {
+                    charSequence276 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, charSequence276);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F276': "+ unionIndex276));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex277 = (decoder.readIndex());
+        if (unionIndex277 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, null);
+        } else {
+            if (unionIndex277 == 1) {
+                Utf8 charSequence277;
+                Object oldString277 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(277);
+                if (oldString277 instanceof Utf8) {
+                    charSequence277 = (decoder).readString(((Utf8) oldString277));
+                } else {
+                    charSequence277 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, charSequence277);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F277': "+ unionIndex277));
+            }
+        }
+        int unionIndex278 = (decoder.readIndex());
+        if (unionIndex278 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, null);
+        } else {
+            if (unionIndex278 == 1) {
+                Utf8 charSequence278;
+                Object oldString278 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(278);
+                if (oldString278 instanceof Utf8) {
+                    charSequence278 = (decoder).readString(((Utf8) oldString278));
+                } else {
+                    charSequence278 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, charSequence278);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F278': "+ unionIndex278));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex279 = (decoder.readIndex());
+        if (unionIndex279 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, null);
+        } else {
+            if (unionIndex279 == 1) {
+                Utf8 charSequence279;
+                Object oldString279 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(279);
+                if (oldString279 instanceof Utf8) {
+                    charSequence279 = (decoder).readString(((Utf8) oldString279));
+                } else {
+                    charSequence279 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, charSequence279);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F279': "+ unionIndex279));
+            }
+        }
+        int unionIndex280 = (decoder.readIndex());
+        if (unionIndex280 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, null);
+        } else {
+            if (unionIndex280 == 1) {
+                Utf8 charSequence280;
+                Object oldString280 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(280);
+                if (oldString280 instanceof Utf8) {
+                    charSequence280 = (decoder).readString(((Utf8) oldString280));
+                } else {
+                    charSequence280 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, charSequence280);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F280': "+ unionIndex280));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex281 = (decoder.readIndex());
+        if (unionIndex281 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, null);
+        } else {
+            if (unionIndex281 == 1) {
+                Utf8 charSequence281;
+                Object oldString281 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(281);
+                if (oldString281 instanceof Utf8) {
+                    charSequence281 = (decoder).readString(((Utf8) oldString281));
+                } else {
+                    charSequence281 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, charSequence281);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F281': "+ unionIndex281));
+            }
+        }
+        int unionIndex282 = (decoder.readIndex());
+        if (unionIndex282 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, null);
+        } else {
+            if (unionIndex282 == 1) {
+                Utf8 charSequence282;
+                Object oldString282 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(282);
+                if (oldString282 instanceof Utf8) {
+                    charSequence282 = (decoder).readString(((Utf8) oldString282));
+                } else {
+                    charSequence282 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, charSequence282);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F282': "+ unionIndex282));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex283 = (decoder.readIndex());
+        if (unionIndex283 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, null);
+        } else {
+            if (unionIndex283 == 1) {
+                Utf8 charSequence283;
+                Object oldString283 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(283);
+                if (oldString283 instanceof Utf8) {
+                    charSequence283 = (decoder).readString(((Utf8) oldString283));
+                } else {
+                    charSequence283 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, charSequence283);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F283': "+ unionIndex283));
+            }
+        }
+        int unionIndex284 = (decoder.readIndex());
+        if (unionIndex284 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, null);
+        } else {
+            if (unionIndex284 == 1) {
+                Utf8 charSequence284;
+                Object oldString284 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(284);
+                if (oldString284 instanceof Utf8) {
+                    charSequence284 = (decoder).readString(((Utf8) oldString284));
+                } else {
+                    charSequence284 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, charSequence284);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F284': "+ unionIndex284));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex285 = (decoder.readIndex());
+        if (unionIndex285 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, null);
+        } else {
+            if (unionIndex285 == 1) {
+                Utf8 charSequence285;
+                Object oldString285 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(285);
+                if (oldString285 instanceof Utf8) {
+                    charSequence285 = (decoder).readString(((Utf8) oldString285));
+                } else {
+                    charSequence285 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, charSequence285);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F285': "+ unionIndex285));
+            }
+        }
+        int unionIndex286 = (decoder.readIndex());
+        if (unionIndex286 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, null);
+        } else {
+            if (unionIndex286 == 1) {
+                Utf8 charSequence286;
+                Object oldString286 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(286);
+                if (oldString286 instanceof Utf8) {
+                    charSequence286 = (decoder).readString(((Utf8) oldString286));
+                } else {
+                    charSequence286 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, charSequence286);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F286': "+ unionIndex286));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex287 = (decoder.readIndex());
+        if (unionIndex287 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, null);
+        } else {
+            if (unionIndex287 == 1) {
+                Utf8 charSequence287;
+                Object oldString287 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(287);
+                if (oldString287 instanceof Utf8) {
+                    charSequence287 = (decoder).readString(((Utf8) oldString287));
+                } else {
+                    charSequence287 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, charSequence287);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F287': "+ unionIndex287));
+            }
+        }
+        int unionIndex288 = (decoder.readIndex());
+        if (unionIndex288 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, null);
+        } else {
+            if (unionIndex288 == 1) {
+                Utf8 charSequence288;
+                Object oldString288 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(288);
+                if (oldString288 instanceof Utf8) {
+                    charSequence288 = (decoder).readString(((Utf8) oldString288));
+                } else {
+                    charSequence288 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, charSequence288);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F288': "+ unionIndex288));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex289 = (decoder.readIndex());
+        if (unionIndex289 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, null);
+        } else {
+            if (unionIndex289 == 1) {
+                Utf8 charSequence289;
+                Object oldString289 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(289);
+                if (oldString289 instanceof Utf8) {
+                    charSequence289 = (decoder).readString(((Utf8) oldString289));
+                } else {
+                    charSequence289 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, charSequence289);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F289': "+ unionIndex289));
+            }
+        }
+        int unionIndex290 = (decoder.readIndex());
+        if (unionIndex290 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, null);
+        } else {
+            if (unionIndex290 == 1) {
+                Utf8 charSequence290;
+                Object oldString290 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(290);
+                if (oldString290 instanceof Utf8) {
+                    charSequence290 = (decoder).readString(((Utf8) oldString290));
+                } else {
+                    charSequence290 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, charSequence290);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F290': "+ unionIndex290));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex291 = (decoder.readIndex());
+        if (unionIndex291 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, null);
+        } else {
+            if (unionIndex291 == 1) {
+                Utf8 charSequence291;
+                Object oldString291 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(291);
+                if (oldString291 instanceof Utf8) {
+                    charSequence291 = (decoder).readString(((Utf8) oldString291));
+                } else {
+                    charSequence291 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, charSequence291);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F291': "+ unionIndex291));
+            }
+        }
+        int unionIndex292 = (decoder.readIndex());
+        if (unionIndex292 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, null);
+        } else {
+            if (unionIndex292 == 1) {
+                Utf8 charSequence292;
+                Object oldString292 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(292);
+                if (oldString292 instanceof Utf8) {
+                    charSequence292 = (decoder).readString(((Utf8) oldString292));
+                } else {
+                    charSequence292 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, charSequence292);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F292': "+ unionIndex292));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex293 = (decoder.readIndex());
+        if (unionIndex293 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, null);
+        } else {
+            if (unionIndex293 == 1) {
+                Utf8 charSequence293;
+                Object oldString293 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(293);
+                if (oldString293 instanceof Utf8) {
+                    charSequence293 = (decoder).readString(((Utf8) oldString293));
+                } else {
+                    charSequence293 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, charSequence293);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F293': "+ unionIndex293));
+            }
+        }
+        int unionIndex294 = (decoder.readIndex());
+        if (unionIndex294 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, null);
+        } else {
+            if (unionIndex294 == 1) {
+                Utf8 charSequence294;
+                Object oldString294 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(294);
+                if (oldString294 instanceof Utf8) {
+                    charSequence294 = (decoder).readString(((Utf8) oldString294));
+                } else {
+                    charSequence294 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, charSequence294);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F294': "+ unionIndex294));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex295 = (decoder.readIndex());
+        if (unionIndex295 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, null);
+        } else {
+            if (unionIndex295 == 1) {
+                Utf8 charSequence295;
+                Object oldString295 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(295);
+                if (oldString295 instanceof Utf8) {
+                    charSequence295 = (decoder).readString(((Utf8) oldString295));
+                } else {
+                    charSequence295 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, charSequence295);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F295': "+ unionIndex295));
+            }
+        }
+        int unionIndex296 = (decoder.readIndex());
+        if (unionIndex296 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, null);
+        } else {
+            if (unionIndex296 == 1) {
+                Utf8 charSequence296;
+                Object oldString296 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(296);
+                if (oldString296 instanceof Utf8) {
+                    charSequence296 = (decoder).readString(((Utf8) oldString296));
+                } else {
+                    charSequence296 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, charSequence296);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F296': "+ unionIndex296));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex297 = (decoder.readIndex());
+        if (unionIndex297 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, null);
+        } else {
+            if (unionIndex297 == 1) {
+                Utf8 charSequence297;
+                Object oldString297 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(297);
+                if (oldString297 instanceof Utf8) {
+                    charSequence297 = (decoder).readString(((Utf8) oldString297));
+                } else {
+                    charSequence297 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, charSequence297);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F297': "+ unionIndex297));
+            }
+        }
+        int unionIndex298 = (decoder.readIndex());
+        if (unionIndex298 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, null);
+        } else {
+            if (unionIndex298 == 1) {
+                Utf8 charSequence298;
+                Object oldString298 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(298);
+                if (oldString298 instanceof Utf8) {
+                    charSequence298 = (decoder).readString(((Utf8) oldString298));
+                } else {
+                    charSequence298 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, charSequence298);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F298': "+ unionIndex298));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex299 = (decoder.readIndex());
+        if (unionIndex299 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, null);
+        } else {
+            if (unionIndex299 == 1) {
+                Utf8 charSequence299;
+                Object oldString299 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(299);
+                if (oldString299 instanceof Utf8) {
+                    charSequence299 = (decoder).readString(((Utf8) oldString299));
+                } else {
+                    charSequence299 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, charSequence299);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F299': "+ unionIndex299));
+            }
+        }
+        int unionIndex300 = (decoder.readIndex());
+        if (unionIndex300 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, null);
+        } else {
+            if (unionIndex300 == 1) {
+                Utf8 charSequence300;
+                Object oldString300 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(300);
+                if (oldString300 instanceof Utf8) {
+                    charSequence300 = (decoder).readString(((Utf8) oldString300));
+                } else {
+                    charSequence300 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, charSequence300);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F300': "+ unionIndex300));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex301 = (decoder.readIndex());
+        if (unionIndex301 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, null);
+        } else {
+            if (unionIndex301 == 1) {
+                Utf8 charSequence301;
+                Object oldString301 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(301);
+                if (oldString301 instanceof Utf8) {
+                    charSequence301 = (decoder).readString(((Utf8) oldString301));
+                } else {
+                    charSequence301 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, charSequence301);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F301': "+ unionIndex301));
+            }
+        }
+        int unionIndex302 = (decoder.readIndex());
+        if (unionIndex302 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, null);
+        } else {
+            if (unionIndex302 == 1) {
+                Utf8 charSequence302;
+                Object oldString302 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(302);
+                if (oldString302 instanceof Utf8) {
+                    charSequence302 = (decoder).readString(((Utf8) oldString302));
+                } else {
+                    charSequence302 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, charSequence302);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F302': "+ unionIndex302));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex303 = (decoder.readIndex());
+        if (unionIndex303 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, null);
+        } else {
+            if (unionIndex303 == 1) {
+                Utf8 charSequence303;
+                Object oldString303 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(303);
+                if (oldString303 instanceof Utf8) {
+                    charSequence303 = (decoder).readString(((Utf8) oldString303));
+                } else {
+                    charSequence303 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, charSequence303);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F303': "+ unionIndex303));
+            }
+        }
+        int unionIndex304 = (decoder.readIndex());
+        if (unionIndex304 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, null);
+        } else {
+            if (unionIndex304 == 1) {
+                Utf8 charSequence304;
+                Object oldString304 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(304);
+                if (oldString304 instanceof Utf8) {
+                    charSequence304 = (decoder).readString(((Utf8) oldString304));
+                } else {
+                    charSequence304 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, charSequence304);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F304': "+ unionIndex304));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex305 = (decoder.readIndex());
+        if (unionIndex305 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, null);
+        } else {
+            if (unionIndex305 == 1) {
+                Utf8 charSequence305;
+                Object oldString305 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(305);
+                if (oldString305 instanceof Utf8) {
+                    charSequence305 = (decoder).readString(((Utf8) oldString305));
+                } else {
+                    charSequence305 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, charSequence305);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F305': "+ unionIndex305));
+            }
+        }
+        int unionIndex306 = (decoder.readIndex());
+        if (unionIndex306 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, null);
+        } else {
+            if (unionIndex306 == 1) {
+                Utf8 charSequence306;
+                Object oldString306 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(306);
+                if (oldString306 instanceof Utf8) {
+                    charSequence306 = (decoder).readString(((Utf8) oldString306));
+                } else {
+                    charSequence306 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, charSequence306);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F306': "+ unionIndex306));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex307 = (decoder.readIndex());
+        if (unionIndex307 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, null);
+        } else {
+            if (unionIndex307 == 1) {
+                Utf8 charSequence307;
+                Object oldString307 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(307);
+                if (oldString307 instanceof Utf8) {
+                    charSequence307 = (decoder).readString(((Utf8) oldString307));
+                } else {
+                    charSequence307 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, charSequence307);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F307': "+ unionIndex307));
+            }
+        }
+        int unionIndex308 = (decoder.readIndex());
+        if (unionIndex308 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, null);
+        } else {
+            if (unionIndex308 == 1) {
+                Utf8 charSequence308;
+                Object oldString308 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(308);
+                if (oldString308 instanceof Utf8) {
+                    charSequence308 = (decoder).readString(((Utf8) oldString308));
+                } else {
+                    charSequence308 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, charSequence308);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F308': "+ unionIndex308));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex309 = (decoder.readIndex());
+        if (unionIndex309 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, null);
+        } else {
+            if (unionIndex309 == 1) {
+                Utf8 charSequence309;
+                Object oldString309 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(309);
+                if (oldString309 instanceof Utf8) {
+                    charSequence309 = (decoder).readString(((Utf8) oldString309));
+                } else {
+                    charSequence309 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, charSequence309);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F309': "+ unionIndex309));
+            }
+        }
+        int unionIndex310 = (decoder.readIndex());
+        if (unionIndex310 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, null);
+        } else {
+            if (unionIndex310 == 1) {
+                Utf8 charSequence310;
+                Object oldString310 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(310);
+                if (oldString310 instanceof Utf8) {
+                    charSequence310 = (decoder).readString(((Utf8) oldString310));
+                } else {
+                    charSequence310 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, charSequence310);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F310': "+ unionIndex310));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex311 = (decoder.readIndex());
+        if (unionIndex311 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, null);
+        } else {
+            if (unionIndex311 == 1) {
+                Utf8 charSequence311;
+                Object oldString311 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(311);
+                if (oldString311 instanceof Utf8) {
+                    charSequence311 = (decoder).readString(((Utf8) oldString311));
+                } else {
+                    charSequence311 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, charSequence311);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F311': "+ unionIndex311));
+            }
+        }
+        int unionIndex312 = (decoder.readIndex());
+        if (unionIndex312 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, null);
+        } else {
+            if (unionIndex312 == 1) {
+                Utf8 charSequence312;
+                Object oldString312 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(312);
+                if (oldString312 instanceof Utf8) {
+                    charSequence312 = (decoder).readString(((Utf8) oldString312));
+                } else {
+                    charSequence312 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, charSequence312);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F312': "+ unionIndex312));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex313 = (decoder.readIndex());
+        if (unionIndex313 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, null);
+        } else {
+            if (unionIndex313 == 1) {
+                Utf8 charSequence313;
+                Object oldString313 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(313);
+                if (oldString313 instanceof Utf8) {
+                    charSequence313 = (decoder).readString(((Utf8) oldString313));
+                } else {
+                    charSequence313 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, charSequence313);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F313': "+ unionIndex313));
+            }
+        }
+        int unionIndex314 = (decoder.readIndex());
+        if (unionIndex314 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, null);
+        } else {
+            if (unionIndex314 == 1) {
+                Utf8 charSequence314;
+                Object oldString314 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(314);
+                if (oldString314 instanceof Utf8) {
+                    charSequence314 = (decoder).readString(((Utf8) oldString314));
+                } else {
+                    charSequence314 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, charSequence314);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F314': "+ unionIndex314));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex315 = (decoder.readIndex());
+        if (unionIndex315 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, null);
+        } else {
+            if (unionIndex315 == 1) {
+                Utf8 charSequence315;
+                Object oldString315 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(315);
+                if (oldString315 instanceof Utf8) {
+                    charSequence315 = (decoder).readString(((Utf8) oldString315));
+                } else {
+                    charSequence315 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, charSequence315);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F315': "+ unionIndex315));
+            }
+        }
+        int unionIndex316 = (decoder.readIndex());
+        if (unionIndex316 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, null);
+        } else {
+            if (unionIndex316 == 1) {
+                Utf8 charSequence316;
+                Object oldString316 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(316);
+                if (oldString316 instanceof Utf8) {
+                    charSequence316 = (decoder).readString(((Utf8) oldString316));
+                } else {
+                    charSequence316 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, charSequence316);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F316': "+ unionIndex316));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex317 = (decoder.readIndex());
+        if (unionIndex317 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, null);
+        } else {
+            if (unionIndex317 == 1) {
+                Utf8 charSequence317;
+                Object oldString317 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(317);
+                if (oldString317 instanceof Utf8) {
+                    charSequence317 = (decoder).readString(((Utf8) oldString317));
+                } else {
+                    charSequence317 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, charSequence317);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F317': "+ unionIndex317));
+            }
+        }
+        int unionIndex318 = (decoder.readIndex());
+        if (unionIndex318 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, null);
+        } else {
+            if (unionIndex318 == 1) {
+                Utf8 charSequence318;
+                Object oldString318 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(318);
+                if (oldString318 instanceof Utf8) {
+                    charSequence318 = (decoder).readString(((Utf8) oldString318));
+                } else {
+                    charSequence318 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, charSequence318);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F318': "+ unionIndex318));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex319 = (decoder.readIndex());
+        if (unionIndex319 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, null);
+        } else {
+            if (unionIndex319 == 1) {
+                Utf8 charSequence319;
+                Object oldString319 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(319);
+                if (oldString319 instanceof Utf8) {
+                    charSequence319 = (decoder).readString(((Utf8) oldString319));
+                } else {
+                    charSequence319 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, charSequence319);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F319': "+ unionIndex319));
+            }
+        }
+        int unionIndex320 = (decoder.readIndex());
+        if (unionIndex320 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, null);
+        } else {
+            if (unionIndex320 == 1) {
+                Utf8 charSequence320;
+                Object oldString320 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(320);
+                if (oldString320 instanceof Utf8) {
+                    charSequence320 = (decoder).readString(((Utf8) oldString320));
+                } else {
+                    charSequence320 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, charSequence320);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F320': "+ unionIndex320));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex321 = (decoder.readIndex());
+        if (unionIndex321 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, null);
+        } else {
+            if (unionIndex321 == 1) {
+                Utf8 charSequence321;
+                Object oldString321 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(321);
+                if (oldString321 instanceof Utf8) {
+                    charSequence321 = (decoder).readString(((Utf8) oldString321));
+                } else {
+                    charSequence321 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, charSequence321);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F321': "+ unionIndex321));
+            }
+        }
+        int unionIndex322 = (decoder.readIndex());
+        if (unionIndex322 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, null);
+        } else {
+            if (unionIndex322 == 1) {
+                Utf8 charSequence322;
+                Object oldString322 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(322);
+                if (oldString322 instanceof Utf8) {
+                    charSequence322 = (decoder).readString(((Utf8) oldString322));
+                } else {
+                    charSequence322 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, charSequence322);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F322': "+ unionIndex322));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex323 = (decoder.readIndex());
+        if (unionIndex323 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, null);
+        } else {
+            if (unionIndex323 == 1) {
+                Utf8 charSequence323;
+                Object oldString323 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(323);
+                if (oldString323 instanceof Utf8) {
+                    charSequence323 = (decoder).readString(((Utf8) oldString323));
+                } else {
+                    charSequence323 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, charSequence323);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F323': "+ unionIndex323));
+            }
+        }
+        int unionIndex324 = (decoder.readIndex());
+        if (unionIndex324 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, null);
+        } else {
+            if (unionIndex324 == 1) {
+                Utf8 charSequence324;
+                Object oldString324 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(324);
+                if (oldString324 instanceof Utf8) {
+                    charSequence324 = (decoder).readString(((Utf8) oldString324));
+                } else {
+                    charSequence324 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, charSequence324);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F324': "+ unionIndex324));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex325 = (decoder.readIndex());
+        if (unionIndex325 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, null);
+        } else {
+            if (unionIndex325 == 1) {
+                Utf8 charSequence325;
+                Object oldString325 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(325);
+                if (oldString325 instanceof Utf8) {
+                    charSequence325 = (decoder).readString(((Utf8) oldString325));
+                } else {
+                    charSequence325 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, charSequence325);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F325': "+ unionIndex325));
+            }
+        }
+        int unionIndex326 = (decoder.readIndex());
+        if (unionIndex326 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, null);
+        } else {
+            if (unionIndex326 == 1) {
+                Utf8 charSequence326;
+                Object oldString326 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(326);
+                if (oldString326 instanceof Utf8) {
+                    charSequence326 = (decoder).readString(((Utf8) oldString326));
+                } else {
+                    charSequence326 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, charSequence326);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F326': "+ unionIndex326));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex327 = (decoder.readIndex());
+        if (unionIndex327 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, null);
+        } else {
+            if (unionIndex327 == 1) {
+                Utf8 charSequence327;
+                Object oldString327 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(327);
+                if (oldString327 instanceof Utf8) {
+                    charSequence327 = (decoder).readString(((Utf8) oldString327));
+                } else {
+                    charSequence327 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, charSequence327);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F327': "+ unionIndex327));
+            }
+        }
+        int unionIndex328 = (decoder.readIndex());
+        if (unionIndex328 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, null);
+        } else {
+            if (unionIndex328 == 1) {
+                Utf8 charSequence328;
+                Object oldString328 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(328);
+                if (oldString328 instanceof Utf8) {
+                    charSequence328 = (decoder).readString(((Utf8) oldString328));
+                } else {
+                    charSequence328 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, charSequence328);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F328': "+ unionIndex328));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex329 = (decoder.readIndex());
+        if (unionIndex329 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, null);
+        } else {
+            if (unionIndex329 == 1) {
+                Utf8 charSequence329;
+                Object oldString329 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(329);
+                if (oldString329 instanceof Utf8) {
+                    charSequence329 = (decoder).readString(((Utf8) oldString329));
+                } else {
+                    charSequence329 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, charSequence329);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F329': "+ unionIndex329));
+            }
+        }
+        int unionIndex330 = (decoder.readIndex());
+        if (unionIndex330 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, null);
+        } else {
+            if (unionIndex330 == 1) {
+                Utf8 charSequence330;
+                Object oldString330 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(330);
+                if (oldString330 instanceof Utf8) {
+                    charSequence330 = (decoder).readString(((Utf8) oldString330));
+                } else {
+                    charSequence330 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, charSequence330);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F330': "+ unionIndex330));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex331 = (decoder.readIndex());
+        if (unionIndex331 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, null);
+        } else {
+            if (unionIndex331 == 1) {
+                Utf8 charSequence331;
+                Object oldString331 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(331);
+                if (oldString331 instanceof Utf8) {
+                    charSequence331 = (decoder).readString(((Utf8) oldString331));
+                } else {
+                    charSequence331 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, charSequence331);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F331': "+ unionIndex331));
+            }
+        }
+        int unionIndex332 = (decoder.readIndex());
+        if (unionIndex332 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, null);
+        } else {
+            if (unionIndex332 == 1) {
+                Utf8 charSequence332;
+                Object oldString332 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(332);
+                if (oldString332 instanceof Utf8) {
+                    charSequence332 = (decoder).readString(((Utf8) oldString332));
+                } else {
+                    charSequence332 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, charSequence332);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F332': "+ unionIndex332));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex333 = (decoder.readIndex());
+        if (unionIndex333 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, null);
+        } else {
+            if (unionIndex333 == 1) {
+                Utf8 charSequence333;
+                Object oldString333 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(333);
+                if (oldString333 instanceof Utf8) {
+                    charSequence333 = (decoder).readString(((Utf8) oldString333));
+                } else {
+                    charSequence333 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, charSequence333);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F333': "+ unionIndex333));
+            }
+        }
+        int unionIndex334 = (decoder.readIndex());
+        if (unionIndex334 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, null);
+        } else {
+            if (unionIndex334 == 1) {
+                Utf8 charSequence334;
+                Object oldString334 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(334);
+                if (oldString334 instanceof Utf8) {
+                    charSequence334 = (decoder).readString(((Utf8) oldString334));
+                } else {
+                    charSequence334 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, charSequence334);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F334': "+ unionIndex334));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex335 = (decoder.readIndex());
+        if (unionIndex335 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, null);
+        } else {
+            if (unionIndex335 == 1) {
+                Utf8 charSequence335;
+                Object oldString335 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(335);
+                if (oldString335 instanceof Utf8) {
+                    charSequence335 = (decoder).readString(((Utf8) oldString335));
+                } else {
+                    charSequence335 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, charSequence335);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F335': "+ unionIndex335));
+            }
+        }
+        int unionIndex336 = (decoder.readIndex());
+        if (unionIndex336 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, null);
+        } else {
+            if (unionIndex336 == 1) {
+                Utf8 charSequence336;
+                Object oldString336 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(336);
+                if (oldString336 instanceof Utf8) {
+                    charSequence336 = (decoder).readString(((Utf8) oldString336));
+                } else {
+                    charSequence336 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, charSequence336);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F336': "+ unionIndex336));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex337 = (decoder.readIndex());
+        if (unionIndex337 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, null);
+        } else {
+            if (unionIndex337 == 1) {
+                Utf8 charSequence337;
+                Object oldString337 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(337);
+                if (oldString337 instanceof Utf8) {
+                    charSequence337 = (decoder).readString(((Utf8) oldString337));
+                } else {
+                    charSequence337 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, charSequence337);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F337': "+ unionIndex337));
+            }
+        }
+        int unionIndex338 = (decoder.readIndex());
+        if (unionIndex338 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, null);
+        } else {
+            if (unionIndex338 == 1) {
+                Utf8 charSequence338;
+                Object oldString338 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(338);
+                if (oldString338 instanceof Utf8) {
+                    charSequence338 = (decoder).readString(((Utf8) oldString338));
+                } else {
+                    charSequence338 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, charSequence338);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F338': "+ unionIndex338));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex339 = (decoder.readIndex());
+        if (unionIndex339 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, null);
+        } else {
+            if (unionIndex339 == 1) {
+                Utf8 charSequence339;
+                Object oldString339 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(339);
+                if (oldString339 instanceof Utf8) {
+                    charSequence339 = (decoder).readString(((Utf8) oldString339));
+                } else {
+                    charSequence339 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, charSequence339);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F339': "+ unionIndex339));
+            }
+        }
+        int unionIndex340 = (decoder.readIndex());
+        if (unionIndex340 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, null);
+        } else {
+            if (unionIndex340 == 1) {
+                Utf8 charSequence340;
+                Object oldString340 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(340);
+                if (oldString340 instanceof Utf8) {
+                    charSequence340 = (decoder).readString(((Utf8) oldString340));
+                } else {
+                    charSequence340 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, charSequence340);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F340': "+ unionIndex340));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex341 = (decoder.readIndex());
+        if (unionIndex341 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, null);
+        } else {
+            if (unionIndex341 == 1) {
+                Utf8 charSequence341;
+                Object oldString341 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(341);
+                if (oldString341 instanceof Utf8) {
+                    charSequence341 = (decoder).readString(((Utf8) oldString341));
+                } else {
+                    charSequence341 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, charSequence341);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F341': "+ unionIndex341));
+            }
+        }
+        int unionIndex342 = (decoder.readIndex());
+        if (unionIndex342 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, null);
+        } else {
+            if (unionIndex342 == 1) {
+                Utf8 charSequence342;
+                Object oldString342 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(342);
+                if (oldString342 instanceof Utf8) {
+                    charSequence342 = (decoder).readString(((Utf8) oldString342));
+                } else {
+                    charSequence342 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, charSequence342);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F342': "+ unionIndex342));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex343 = (decoder.readIndex());
+        if (unionIndex343 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, null);
+        } else {
+            if (unionIndex343 == 1) {
+                Utf8 charSequence343;
+                Object oldString343 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(343);
+                if (oldString343 instanceof Utf8) {
+                    charSequence343 = (decoder).readString(((Utf8) oldString343));
+                } else {
+                    charSequence343 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, charSequence343);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F343': "+ unionIndex343));
+            }
+        }
+        int unionIndex344 = (decoder.readIndex());
+        if (unionIndex344 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, null);
+        } else {
+            if (unionIndex344 == 1) {
+                Utf8 charSequence344;
+                Object oldString344 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(344);
+                if (oldString344 instanceof Utf8) {
+                    charSequence344 = (decoder).readString(((Utf8) oldString344));
+                } else {
+                    charSequence344 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, charSequence344);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F344': "+ unionIndex344));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex345 = (decoder.readIndex());
+        if (unionIndex345 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, null);
+        } else {
+            if (unionIndex345 == 1) {
+                Utf8 charSequence345;
+                Object oldString345 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(345);
+                if (oldString345 instanceof Utf8) {
+                    charSequence345 = (decoder).readString(((Utf8) oldString345));
+                } else {
+                    charSequence345 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, charSequence345);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F345': "+ unionIndex345));
+            }
+        }
+        int unionIndex346 = (decoder.readIndex());
+        if (unionIndex346 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, null);
+        } else {
+            if (unionIndex346 == 1) {
+                Utf8 charSequence346;
+                Object oldString346 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(346);
+                if (oldString346 instanceof Utf8) {
+                    charSequence346 = (decoder).readString(((Utf8) oldString346));
+                } else {
+                    charSequence346 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, charSequence346);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F346': "+ unionIndex346));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex347 = (decoder.readIndex());
+        if (unionIndex347 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, null);
+        } else {
+            if (unionIndex347 == 1) {
+                Utf8 charSequence347;
+                Object oldString347 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(347);
+                if (oldString347 instanceof Utf8) {
+                    charSequence347 = (decoder).readString(((Utf8) oldString347));
+                } else {
+                    charSequence347 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, charSequence347);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F347': "+ unionIndex347));
+            }
+        }
+        int unionIndex348 = (decoder.readIndex());
+        if (unionIndex348 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, null);
+        } else {
+            if (unionIndex348 == 1) {
+                Utf8 charSequence348;
+                Object oldString348 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(348);
+                if (oldString348 instanceof Utf8) {
+                    charSequence348 = (decoder).readString(((Utf8) oldString348));
+                } else {
+                    charSequence348 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, charSequence348);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F348': "+ unionIndex348));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex349 = (decoder.readIndex());
+        if (unionIndex349 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, null);
+        } else {
+            if (unionIndex349 == 1) {
+                Utf8 charSequence349;
+                Object oldString349 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(349);
+                if (oldString349 instanceof Utf8) {
+                    charSequence349 = (decoder).readString(((Utf8) oldString349));
+                } else {
+                    charSequence349 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, charSequence349);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F349': "+ unionIndex349));
+            }
+        }
+        int unionIndex350 = (decoder.readIndex());
+        if (unionIndex350 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, null);
+        } else {
+            if (unionIndex350 == 1) {
+                Utf8 charSequence350;
+                Object oldString350 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(350);
+                if (oldString350 instanceof Utf8) {
+                    charSequence350 = (decoder).readString(((Utf8) oldString350));
+                } else {
+                    charSequence350 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, charSequence350);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F350': "+ unionIndex350));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex351 = (decoder.readIndex());
+        if (unionIndex351 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, null);
+        } else {
+            if (unionIndex351 == 1) {
+                Utf8 charSequence351;
+                Object oldString351 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(351);
+                if (oldString351 instanceof Utf8) {
+                    charSequence351 = (decoder).readString(((Utf8) oldString351));
+                } else {
+                    charSequence351 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, charSequence351);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F351': "+ unionIndex351));
+            }
+        }
+        int unionIndex352 = (decoder.readIndex());
+        if (unionIndex352 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, null);
+        } else {
+            if (unionIndex352 == 1) {
+                Utf8 charSequence352;
+                Object oldString352 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(352);
+                if (oldString352 instanceof Utf8) {
+                    charSequence352 = (decoder).readString(((Utf8) oldString352));
+                } else {
+                    charSequence352 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, charSequence352);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F352': "+ unionIndex352));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex353 = (decoder.readIndex());
+        if (unionIndex353 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, null);
+        } else {
+            if (unionIndex353 == 1) {
+                Utf8 charSequence353;
+                Object oldString353 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(353);
+                if (oldString353 instanceof Utf8) {
+                    charSequence353 = (decoder).readString(((Utf8) oldString353));
+                } else {
+                    charSequence353 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, charSequence353);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F353': "+ unionIndex353));
+            }
+        }
+        int unionIndex354 = (decoder.readIndex());
+        if (unionIndex354 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, null);
+        } else {
+            if (unionIndex354 == 1) {
+                Utf8 charSequence354;
+                Object oldString354 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(354);
+                if (oldString354 instanceof Utf8) {
+                    charSequence354 = (decoder).readString(((Utf8) oldString354));
+                } else {
+                    charSequence354 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, charSequence354);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F354': "+ unionIndex354));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex355 = (decoder.readIndex());
+        if (unionIndex355 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, null);
+        } else {
+            if (unionIndex355 == 1) {
+                Utf8 charSequence355;
+                Object oldString355 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(355);
+                if (oldString355 instanceof Utf8) {
+                    charSequence355 = (decoder).readString(((Utf8) oldString355));
+                } else {
+                    charSequence355 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, charSequence355);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F355': "+ unionIndex355));
+            }
+        }
+        int unionIndex356 = (decoder.readIndex());
+        if (unionIndex356 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, null);
+        } else {
+            if (unionIndex356 == 1) {
+                Utf8 charSequence356;
+                Object oldString356 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(356);
+                if (oldString356 instanceof Utf8) {
+                    charSequence356 = (decoder).readString(((Utf8) oldString356));
+                } else {
+                    charSequence356 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, charSequence356);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F356': "+ unionIndex356));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex357 = (decoder.readIndex());
+        if (unionIndex357 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, null);
+        } else {
+            if (unionIndex357 == 1) {
+                Utf8 charSequence357;
+                Object oldString357 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(357);
+                if (oldString357 instanceof Utf8) {
+                    charSequence357 = (decoder).readString(((Utf8) oldString357));
+                } else {
+                    charSequence357 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, charSequence357);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F357': "+ unionIndex357));
+            }
+        }
+        int unionIndex358 = (decoder.readIndex());
+        if (unionIndex358 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, null);
+        } else {
+            if (unionIndex358 == 1) {
+                Utf8 charSequence358;
+                Object oldString358 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(358);
+                if (oldString358 instanceof Utf8) {
+                    charSequence358 = (decoder).readString(((Utf8) oldString358));
+                } else {
+                    charSequence358 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, charSequence358);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F358': "+ unionIndex358));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex359 = (decoder.readIndex());
+        if (unionIndex359 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, null);
+        } else {
+            if (unionIndex359 == 1) {
+                Utf8 charSequence359;
+                Object oldString359 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(359);
+                if (oldString359 instanceof Utf8) {
+                    charSequence359 = (decoder).readString(((Utf8) oldString359));
+                } else {
+                    charSequence359 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, charSequence359);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F359': "+ unionIndex359));
+            }
+        }
+        int unionIndex360 = (decoder.readIndex());
+        if (unionIndex360 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, null);
+        } else {
+            if (unionIndex360 == 1) {
+                Utf8 charSequence360;
+                Object oldString360 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(360);
+                if (oldString360 instanceof Utf8) {
+                    charSequence360 = (decoder).readString(((Utf8) oldString360));
+                } else {
+                    charSequence360 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, charSequence360);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F360': "+ unionIndex360));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex361 = (decoder.readIndex());
+        if (unionIndex361 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, null);
+        } else {
+            if (unionIndex361 == 1) {
+                Utf8 charSequence361;
+                Object oldString361 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(361);
+                if (oldString361 instanceof Utf8) {
+                    charSequence361 = (decoder).readString(((Utf8) oldString361));
+                } else {
+                    charSequence361 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, charSequence361);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F361': "+ unionIndex361));
+            }
+        }
+        int unionIndex362 = (decoder.readIndex());
+        if (unionIndex362 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, null);
+        } else {
+            if (unionIndex362 == 1) {
+                Utf8 charSequence362;
+                Object oldString362 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(362);
+                if (oldString362 instanceof Utf8) {
+                    charSequence362 = (decoder).readString(((Utf8) oldString362));
+                } else {
+                    charSequence362 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, charSequence362);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F362': "+ unionIndex362));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex363 = (decoder.readIndex());
+        if (unionIndex363 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, null);
+        } else {
+            if (unionIndex363 == 1) {
+                Utf8 charSequence363;
+                Object oldString363 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(363);
+                if (oldString363 instanceof Utf8) {
+                    charSequence363 = (decoder).readString(((Utf8) oldString363));
+                } else {
+                    charSequence363 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, charSequence363);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F363': "+ unionIndex363));
+            }
+        }
+        int unionIndex364 = (decoder.readIndex());
+        if (unionIndex364 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, null);
+        } else {
+            if (unionIndex364 == 1) {
+                Utf8 charSequence364;
+                Object oldString364 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(364);
+                if (oldString364 instanceof Utf8) {
+                    charSequence364 = (decoder).readString(((Utf8) oldString364));
+                } else {
+                    charSequence364 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, charSequence364);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F364': "+ unionIndex364));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex365 = (decoder.readIndex());
+        if (unionIndex365 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, null);
+        } else {
+            if (unionIndex365 == 1) {
+                Utf8 charSequence365;
+                Object oldString365 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(365);
+                if (oldString365 instanceof Utf8) {
+                    charSequence365 = (decoder).readString(((Utf8) oldString365));
+                } else {
+                    charSequence365 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, charSequence365);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F365': "+ unionIndex365));
+            }
+        }
+        int unionIndex366 = (decoder.readIndex());
+        if (unionIndex366 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, null);
+        } else {
+            if (unionIndex366 == 1) {
+                Utf8 charSequence366;
+                Object oldString366 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(366);
+                if (oldString366 instanceof Utf8) {
+                    charSequence366 = (decoder).readString(((Utf8) oldString366));
+                } else {
+                    charSequence366 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, charSequence366);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F366': "+ unionIndex366));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex367 = (decoder.readIndex());
+        if (unionIndex367 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, null);
+        } else {
+            if (unionIndex367 == 1) {
+                Utf8 charSequence367;
+                Object oldString367 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(367);
+                if (oldString367 instanceof Utf8) {
+                    charSequence367 = (decoder).readString(((Utf8) oldString367));
+                } else {
+                    charSequence367 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, charSequence367);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F367': "+ unionIndex367));
+            }
+        }
+        int unionIndex368 = (decoder.readIndex());
+        if (unionIndex368 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, null);
+        } else {
+            if (unionIndex368 == 1) {
+                Utf8 charSequence368;
+                Object oldString368 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(368);
+                if (oldString368 instanceof Utf8) {
+                    charSequence368 = (decoder).readString(((Utf8) oldString368));
+                } else {
+                    charSequence368 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, charSequence368);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F368': "+ unionIndex368));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex369 = (decoder.readIndex());
+        if (unionIndex369 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, null);
+        } else {
+            if (unionIndex369 == 1) {
+                Utf8 charSequence369;
+                Object oldString369 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(369);
+                if (oldString369 instanceof Utf8) {
+                    charSequence369 = (decoder).readString(((Utf8) oldString369));
+                } else {
+                    charSequence369 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, charSequence369);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F369': "+ unionIndex369));
+            }
+        }
+        int unionIndex370 = (decoder.readIndex());
+        if (unionIndex370 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, null);
+        } else {
+            if (unionIndex370 == 1) {
+                Utf8 charSequence370;
+                Object oldString370 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(370);
+                if (oldString370 instanceof Utf8) {
+                    charSequence370 = (decoder).readString(((Utf8) oldString370));
+                } else {
+                    charSequence370 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, charSequence370);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F370': "+ unionIndex370));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex371 = (decoder.readIndex());
+        if (unionIndex371 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, null);
+        } else {
+            if (unionIndex371 == 1) {
+                Utf8 charSequence371;
+                Object oldString371 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(371);
+                if (oldString371 instanceof Utf8) {
+                    charSequence371 = (decoder).readString(((Utf8) oldString371));
+                } else {
+                    charSequence371 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, charSequence371);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F371': "+ unionIndex371));
+            }
+        }
+        int unionIndex372 = (decoder.readIndex());
+        if (unionIndex372 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, null);
+        } else {
+            if (unionIndex372 == 1) {
+                Utf8 charSequence372;
+                Object oldString372 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(372);
+                if (oldString372 instanceof Utf8) {
+                    charSequence372 = (decoder).readString(((Utf8) oldString372));
+                } else {
+                    charSequence372 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, charSequence372);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F372': "+ unionIndex372));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex373 = (decoder.readIndex());
+        if (unionIndex373 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, null);
+        } else {
+            if (unionIndex373 == 1) {
+                Utf8 charSequence373;
+                Object oldString373 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(373);
+                if (oldString373 instanceof Utf8) {
+                    charSequence373 = (decoder).readString(((Utf8) oldString373));
+                } else {
+                    charSequence373 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, charSequence373);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F373': "+ unionIndex373));
+            }
+        }
+        int unionIndex374 = (decoder.readIndex());
+        if (unionIndex374 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, null);
+        } else {
+            if (unionIndex374 == 1) {
+                Utf8 charSequence374;
+                Object oldString374 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(374);
+                if (oldString374 instanceof Utf8) {
+                    charSequence374 = (decoder).readString(((Utf8) oldString374));
+                } else {
+                    charSequence374 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, charSequence374);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F374': "+ unionIndex374));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex375 = (decoder.readIndex());
+        if (unionIndex375 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, null);
+        } else {
+            if (unionIndex375 == 1) {
+                Utf8 charSequence375;
+                Object oldString375 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(375);
+                if (oldString375 instanceof Utf8) {
+                    charSequence375 = (decoder).readString(((Utf8) oldString375));
+                } else {
+                    charSequence375 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, charSequence375);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F375': "+ unionIndex375));
+            }
+        }
+        int unionIndex376 = (decoder.readIndex());
+        if (unionIndex376 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, null);
+        } else {
+            if (unionIndex376 == 1) {
+                Utf8 charSequence376;
+                Object oldString376 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(376);
+                if (oldString376 instanceof Utf8) {
+                    charSequence376 = (decoder).readString(((Utf8) oldString376));
+                } else {
+                    charSequence376 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, charSequence376);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F376': "+ unionIndex376));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex377 = (decoder.readIndex());
+        if (unionIndex377 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, null);
+        } else {
+            if (unionIndex377 == 1) {
+                Utf8 charSequence377;
+                Object oldString377 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(377);
+                if (oldString377 instanceof Utf8) {
+                    charSequence377 = (decoder).readString(((Utf8) oldString377));
+                } else {
+                    charSequence377 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, charSequence377);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F377': "+ unionIndex377));
+            }
+        }
+        int unionIndex378 = (decoder.readIndex());
+        if (unionIndex378 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, null);
+        } else {
+            if (unionIndex378 == 1) {
+                Utf8 charSequence378;
+                Object oldString378 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(378);
+                if (oldString378 instanceof Utf8) {
+                    charSequence378 = (decoder).readString(((Utf8) oldString378));
+                } else {
+                    charSequence378 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, charSequence378);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F378': "+ unionIndex378));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex379 = (decoder.readIndex());
+        if (unionIndex379 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, null);
+        } else {
+            if (unionIndex379 == 1) {
+                Utf8 charSequence379;
+                Object oldString379 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(379);
+                if (oldString379 instanceof Utf8) {
+                    charSequence379 = (decoder).readString(((Utf8) oldString379));
+                } else {
+                    charSequence379 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, charSequence379);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F379': "+ unionIndex379));
+            }
+        }
+        int unionIndex380 = (decoder.readIndex());
+        if (unionIndex380 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, null);
+        } else {
+            if (unionIndex380 == 1) {
+                Utf8 charSequence380;
+                Object oldString380 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(380);
+                if (oldString380 instanceof Utf8) {
+                    charSequence380 = (decoder).readString(((Utf8) oldString380));
+                } else {
+                    charSequence380 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, charSequence380);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F380': "+ unionIndex380));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex381 = (decoder.readIndex());
+        if (unionIndex381 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, null);
+        } else {
+            if (unionIndex381 == 1) {
+                Utf8 charSequence381;
+                Object oldString381 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(381);
+                if (oldString381 instanceof Utf8) {
+                    charSequence381 = (decoder).readString(((Utf8) oldString381));
+                } else {
+                    charSequence381 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, charSequence381);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F381': "+ unionIndex381));
+            }
+        }
+        int unionIndex382 = (decoder.readIndex());
+        if (unionIndex382 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, null);
+        } else {
+            if (unionIndex382 == 1) {
+                Utf8 charSequence382;
+                Object oldString382 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(382);
+                if (oldString382 instanceof Utf8) {
+                    charSequence382 = (decoder).readString(((Utf8) oldString382));
+                } else {
+                    charSequence382 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, charSequence382);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F382': "+ unionIndex382));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex383 = (decoder.readIndex());
+        if (unionIndex383 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, null);
+        } else {
+            if (unionIndex383 == 1) {
+                Utf8 charSequence383;
+                Object oldString383 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(383);
+                if (oldString383 instanceof Utf8) {
+                    charSequence383 = (decoder).readString(((Utf8) oldString383));
+                } else {
+                    charSequence383 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, charSequence383);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F383': "+ unionIndex383));
+            }
+        }
+        int unionIndex384 = (decoder.readIndex());
+        if (unionIndex384 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, null);
+        } else {
+            if (unionIndex384 == 1) {
+                Utf8 charSequence384;
+                Object oldString384 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(384);
+                if (oldString384 instanceof Utf8) {
+                    charSequence384 = (decoder).readString(((Utf8) oldString384));
+                } else {
+                    charSequence384 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, charSequence384);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F384': "+ unionIndex384));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex385 = (decoder.readIndex());
+        if (unionIndex385 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, null);
+        } else {
+            if (unionIndex385 == 1) {
+                Utf8 charSequence385;
+                Object oldString385 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(385);
+                if (oldString385 instanceof Utf8) {
+                    charSequence385 = (decoder).readString(((Utf8) oldString385));
+                } else {
+                    charSequence385 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, charSequence385);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F385': "+ unionIndex385));
+            }
+        }
+        int unionIndex386 = (decoder.readIndex());
+        if (unionIndex386 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, null);
+        } else {
+            if (unionIndex386 == 1) {
+                Utf8 charSequence386;
+                Object oldString386 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(386);
+                if (oldString386 instanceof Utf8) {
+                    charSequence386 = (decoder).readString(((Utf8) oldString386));
+                } else {
+                    charSequence386 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, charSequence386);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F386': "+ unionIndex386));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex387 = (decoder.readIndex());
+        if (unionIndex387 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, null);
+        } else {
+            if (unionIndex387 == 1) {
+                Utf8 charSequence387;
+                Object oldString387 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(387);
+                if (oldString387 instanceof Utf8) {
+                    charSequence387 = (decoder).readString(((Utf8) oldString387));
+                } else {
+                    charSequence387 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, charSequence387);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F387': "+ unionIndex387));
+            }
+        }
+        int unionIndex388 = (decoder.readIndex());
+        if (unionIndex388 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, null);
+        } else {
+            if (unionIndex388 == 1) {
+                Utf8 charSequence388;
+                Object oldString388 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(388);
+                if (oldString388 instanceof Utf8) {
+                    charSequence388 = (decoder).readString(((Utf8) oldString388));
+                } else {
+                    charSequence388 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, charSequence388);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F388': "+ unionIndex388));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex389 = (decoder.readIndex());
+        if (unionIndex389 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, null);
+        } else {
+            if (unionIndex389 == 1) {
+                Utf8 charSequence389;
+                Object oldString389 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(389);
+                if (oldString389 instanceof Utf8) {
+                    charSequence389 = (decoder).readString(((Utf8) oldString389));
+                } else {
+                    charSequence389 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, charSequence389);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F389': "+ unionIndex389));
+            }
+        }
+        int unionIndex390 = (decoder.readIndex());
+        if (unionIndex390 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, null);
+        } else {
+            if (unionIndex390 == 1) {
+                Utf8 charSequence390;
+                Object oldString390 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(390);
+                if (oldString390 instanceof Utf8) {
+                    charSequence390 = (decoder).readString(((Utf8) oldString390));
+                } else {
+                    charSequence390 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, charSequence390);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F390': "+ unionIndex390));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex391 = (decoder.readIndex());
+        if (unionIndex391 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, null);
+        } else {
+            if (unionIndex391 == 1) {
+                Utf8 charSequence391;
+                Object oldString391 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(391);
+                if (oldString391 instanceof Utf8) {
+                    charSequence391 = (decoder).readString(((Utf8) oldString391));
+                } else {
+                    charSequence391 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, charSequence391);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F391': "+ unionIndex391));
+            }
+        }
+        int unionIndex392 = (decoder.readIndex());
+        if (unionIndex392 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, null);
+        } else {
+            if (unionIndex392 == 1) {
+                Utf8 charSequence392;
+                Object oldString392 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(392);
+                if (oldString392 instanceof Utf8) {
+                    charSequence392 = (decoder).readString(((Utf8) oldString392));
+                } else {
+                    charSequence392 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, charSequence392);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F392': "+ unionIndex392));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex393 = (decoder.readIndex());
+        if (unionIndex393 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, null);
+        } else {
+            if (unionIndex393 == 1) {
+                Utf8 charSequence393;
+                Object oldString393 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(393);
+                if (oldString393 instanceof Utf8) {
+                    charSequence393 = (decoder).readString(((Utf8) oldString393));
+                } else {
+                    charSequence393 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, charSequence393);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F393': "+ unionIndex393));
+            }
+        }
+        int unionIndex394 = (decoder.readIndex());
+        if (unionIndex394 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, null);
+        } else {
+            if (unionIndex394 == 1) {
+                Utf8 charSequence394;
+                Object oldString394 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(394);
+                if (oldString394 instanceof Utf8) {
+                    charSequence394 = (decoder).readString(((Utf8) oldString394));
+                } else {
+                    charSequence394 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, charSequence394);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F394': "+ unionIndex394));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex395 = (decoder.readIndex());
+        if (unionIndex395 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, null);
+        } else {
+            if (unionIndex395 == 1) {
+                Utf8 charSequence395;
+                Object oldString395 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(395);
+                if (oldString395 instanceof Utf8) {
+                    charSequence395 = (decoder).readString(((Utf8) oldString395));
+                } else {
+                    charSequence395 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, charSequence395);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F395': "+ unionIndex395));
+            }
+        }
+        int unionIndex396 = (decoder.readIndex());
+        if (unionIndex396 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, null);
+        } else {
+            if (unionIndex396 == 1) {
+                Utf8 charSequence396;
+                Object oldString396 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(396);
+                if (oldString396 instanceof Utf8) {
+                    charSequence396 = (decoder).readString(((Utf8) oldString396));
+                } else {
+                    charSequence396 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, charSequence396);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F396': "+ unionIndex396));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex397 = (decoder.readIndex());
+        if (unionIndex397 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, null);
+        } else {
+            if (unionIndex397 == 1) {
+                Utf8 charSequence397;
+                Object oldString397 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(397);
+                if (oldString397 instanceof Utf8) {
+                    charSequence397 = (decoder).readString(((Utf8) oldString397));
+                } else {
+                    charSequence397 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, charSequence397);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F397': "+ unionIndex397));
+            }
+        }
+        int unionIndex398 = (decoder.readIndex());
+        if (unionIndex398 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, null);
+        } else {
+            if (unionIndex398 == 1) {
+                Utf8 charSequence398;
+                Object oldString398 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(398);
+                if (oldString398 instanceof Utf8) {
+                    charSequence398 = (decoder).readString(((Utf8) oldString398));
+                } else {
+                    charSequence398 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, charSequence398);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F398': "+ unionIndex398));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex399 = (decoder.readIndex());
+        if (unionIndex399 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, null);
+        } else {
+            if (unionIndex399 == 1) {
+                Utf8 charSequence399;
+                Object oldString399 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(399);
+                if (oldString399 instanceof Utf8) {
+                    charSequence399 = (decoder).readString(((Utf8) oldString399));
+                } else {
+                    charSequence399 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, charSequence399);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F399': "+ unionIndex399));
+            }
+        }
+        int unionIndex400 = (decoder.readIndex());
+        if (unionIndex400 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, null);
+        } else {
+            if (unionIndex400 == 1) {
+                Utf8 charSequence400;
+                Object oldString400 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(400);
+                if (oldString400 instanceof Utf8) {
+                    charSequence400 = (decoder).readString(((Utf8) oldString400));
+                } else {
+                    charSequence400 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, charSequence400);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F400': "+ unionIndex400));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex401 = (decoder.readIndex());
+        if (unionIndex401 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, null);
+        } else {
+            if (unionIndex401 == 1) {
+                Utf8 charSequence401;
+                Object oldString401 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(401);
+                if (oldString401 instanceof Utf8) {
+                    charSequence401 = (decoder).readString(((Utf8) oldString401));
+                } else {
+                    charSequence401 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, charSequence401);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F401': "+ unionIndex401));
+            }
+        }
+        int unionIndex402 = (decoder.readIndex());
+        if (unionIndex402 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, null);
+        } else {
+            if (unionIndex402 == 1) {
+                Utf8 charSequence402;
+                Object oldString402 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(402);
+                if (oldString402 instanceof Utf8) {
+                    charSequence402 = (decoder).readString(((Utf8) oldString402));
+                } else {
+                    charSequence402 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, charSequence402);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F402': "+ unionIndex402));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex403 = (decoder.readIndex());
+        if (unionIndex403 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, null);
+        } else {
+            if (unionIndex403 == 1) {
+                Utf8 charSequence403;
+                Object oldString403 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(403);
+                if (oldString403 instanceof Utf8) {
+                    charSequence403 = (decoder).readString(((Utf8) oldString403));
+                } else {
+                    charSequence403 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, charSequence403);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F403': "+ unionIndex403));
+            }
+        }
+        int unionIndex404 = (decoder.readIndex());
+        if (unionIndex404 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, null);
+        } else {
+            if (unionIndex404 == 1) {
+                Utf8 charSequence404;
+                Object oldString404 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(404);
+                if (oldString404 instanceof Utf8) {
+                    charSequence404 = (decoder).readString(((Utf8) oldString404));
+                } else {
+                    charSequence404 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, charSequence404);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F404': "+ unionIndex404));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex405 = (decoder.readIndex());
+        if (unionIndex405 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, null);
+        } else {
+            if (unionIndex405 == 1) {
+                Utf8 charSequence405;
+                Object oldString405 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(405);
+                if (oldString405 instanceof Utf8) {
+                    charSequence405 = (decoder).readString(((Utf8) oldString405));
+                } else {
+                    charSequence405 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, charSequence405);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F405': "+ unionIndex405));
+            }
+        }
+        int unionIndex406 = (decoder.readIndex());
+        if (unionIndex406 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, null);
+        } else {
+            if (unionIndex406 == 1) {
+                Utf8 charSequence406;
+                Object oldString406 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(406);
+                if (oldString406 instanceof Utf8) {
+                    charSequence406 = (decoder).readString(((Utf8) oldString406));
+                } else {
+                    charSequence406 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, charSequence406);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F406': "+ unionIndex406));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex407 = (decoder.readIndex());
+        if (unionIndex407 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, null);
+        } else {
+            if (unionIndex407 == 1) {
+                Utf8 charSequence407;
+                Object oldString407 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(407);
+                if (oldString407 instanceof Utf8) {
+                    charSequence407 = (decoder).readString(((Utf8) oldString407));
+                } else {
+                    charSequence407 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, charSequence407);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F407': "+ unionIndex407));
+            }
+        }
+        int unionIndex408 = (decoder.readIndex());
+        if (unionIndex408 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, null);
+        } else {
+            if (unionIndex408 == 1) {
+                Utf8 charSequence408;
+                Object oldString408 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(408);
+                if (oldString408 instanceof Utf8) {
+                    charSequence408 = (decoder).readString(((Utf8) oldString408));
+                } else {
+                    charSequence408 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, charSequence408);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F408': "+ unionIndex408));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex409 = (decoder.readIndex());
+        if (unionIndex409 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, null);
+        } else {
+            if (unionIndex409 == 1) {
+                Utf8 charSequence409;
+                Object oldString409 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(409);
+                if (oldString409 instanceof Utf8) {
+                    charSequence409 = (decoder).readString(((Utf8) oldString409));
+                } else {
+                    charSequence409 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, charSequence409);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F409': "+ unionIndex409));
+            }
+        }
+        int unionIndex410 = (decoder.readIndex());
+        if (unionIndex410 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, null);
+        } else {
+            if (unionIndex410 == 1) {
+                Utf8 charSequence410;
+                Object oldString410 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(410);
+                if (oldString410 instanceof Utf8) {
+                    charSequence410 = (decoder).readString(((Utf8) oldString410));
+                } else {
+                    charSequence410 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, charSequence410);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F410': "+ unionIndex410));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex411 = (decoder.readIndex());
+        if (unionIndex411 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, null);
+        } else {
+            if (unionIndex411 == 1) {
+                Utf8 charSequence411;
+                Object oldString411 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(411);
+                if (oldString411 instanceof Utf8) {
+                    charSequence411 = (decoder).readString(((Utf8) oldString411));
+                } else {
+                    charSequence411 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, charSequence411);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F411': "+ unionIndex411));
+            }
+        }
+        int unionIndex412 = (decoder.readIndex());
+        if (unionIndex412 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, null);
+        } else {
+            if (unionIndex412 == 1) {
+                Utf8 charSequence412;
+                Object oldString412 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(412);
+                if (oldString412 instanceof Utf8) {
+                    charSequence412 = (decoder).readString(((Utf8) oldString412));
+                } else {
+                    charSequence412 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, charSequence412);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F412': "+ unionIndex412));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex413 = (decoder.readIndex());
+        if (unionIndex413 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, null);
+        } else {
+            if (unionIndex413 == 1) {
+                Utf8 charSequence413;
+                Object oldString413 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(413);
+                if (oldString413 instanceof Utf8) {
+                    charSequence413 = (decoder).readString(((Utf8) oldString413));
+                } else {
+                    charSequence413 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, charSequence413);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F413': "+ unionIndex413));
+            }
+        }
+        int unionIndex414 = (decoder.readIndex());
+        if (unionIndex414 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, null);
+        } else {
+            if (unionIndex414 == 1) {
+                Utf8 charSequence414;
+                Object oldString414 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(414);
+                if (oldString414 instanceof Utf8) {
+                    charSequence414 = (decoder).readString(((Utf8) oldString414));
+                } else {
+                    charSequence414 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, charSequence414);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F414': "+ unionIndex414));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex415 = (decoder.readIndex());
+        if (unionIndex415 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, null);
+        } else {
+            if (unionIndex415 == 1) {
+                Utf8 charSequence415;
+                Object oldString415 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(415);
+                if (oldString415 instanceof Utf8) {
+                    charSequence415 = (decoder).readString(((Utf8) oldString415));
+                } else {
+                    charSequence415 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, charSequence415);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F415': "+ unionIndex415));
+            }
+        }
+        int unionIndex416 = (decoder.readIndex());
+        if (unionIndex416 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, null);
+        } else {
+            if (unionIndex416 == 1) {
+                Utf8 charSequence416;
+                Object oldString416 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(416);
+                if (oldString416 instanceof Utf8) {
+                    charSequence416 = (decoder).readString(((Utf8) oldString416));
+                } else {
+                    charSequence416 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, charSequence416);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F416': "+ unionIndex416));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex417 = (decoder.readIndex());
+        if (unionIndex417 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, null);
+        } else {
+            if (unionIndex417 == 1) {
+                Utf8 charSequence417;
+                Object oldString417 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(417);
+                if (oldString417 instanceof Utf8) {
+                    charSequence417 = (decoder).readString(((Utf8) oldString417));
+                } else {
+                    charSequence417 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, charSequence417);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F417': "+ unionIndex417));
+            }
+        }
+        int unionIndex418 = (decoder.readIndex());
+        if (unionIndex418 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, null);
+        } else {
+            if (unionIndex418 == 1) {
+                Utf8 charSequence418;
+                Object oldString418 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(418);
+                if (oldString418 instanceof Utf8) {
+                    charSequence418 = (decoder).readString(((Utf8) oldString418));
+                } else {
+                    charSequence418 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, charSequence418);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F418': "+ unionIndex418));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex419 = (decoder.readIndex());
+        if (unionIndex419 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, null);
+        } else {
+            if (unionIndex419 == 1) {
+                Utf8 charSequence419;
+                Object oldString419 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(419);
+                if (oldString419 instanceof Utf8) {
+                    charSequence419 = (decoder).readString(((Utf8) oldString419));
+                } else {
+                    charSequence419 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, charSequence419);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F419': "+ unionIndex419));
+            }
+        }
+        int unionIndex420 = (decoder.readIndex());
+        if (unionIndex420 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, null);
+        } else {
+            if (unionIndex420 == 1) {
+                Utf8 charSequence420;
+                Object oldString420 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(420);
+                if (oldString420 instanceof Utf8) {
+                    charSequence420 = (decoder).readString(((Utf8) oldString420));
+                } else {
+                    charSequence420 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, charSequence420);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F420': "+ unionIndex420));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex421 = (decoder.readIndex());
+        if (unionIndex421 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, null);
+        } else {
+            if (unionIndex421 == 1) {
+                Utf8 charSequence421;
+                Object oldString421 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(421);
+                if (oldString421 instanceof Utf8) {
+                    charSequence421 = (decoder).readString(((Utf8) oldString421));
+                } else {
+                    charSequence421 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, charSequence421);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F421': "+ unionIndex421));
+            }
+        }
+        int unionIndex422 = (decoder.readIndex());
+        if (unionIndex422 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, null);
+        } else {
+            if (unionIndex422 == 1) {
+                Utf8 charSequence422;
+                Object oldString422 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(422);
+                if (oldString422 instanceof Utf8) {
+                    charSequence422 = (decoder).readString(((Utf8) oldString422));
+                } else {
+                    charSequence422 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, charSequence422);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F422': "+ unionIndex422));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex423 = (decoder.readIndex());
+        if (unionIndex423 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, null);
+        } else {
+            if (unionIndex423 == 1) {
+                Utf8 charSequence423;
+                Object oldString423 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(423);
+                if (oldString423 instanceof Utf8) {
+                    charSequence423 = (decoder).readString(((Utf8) oldString423));
+                } else {
+                    charSequence423 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, charSequence423);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F423': "+ unionIndex423));
+            }
+        }
+        int unionIndex424 = (decoder.readIndex());
+        if (unionIndex424 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, null);
+        } else {
+            if (unionIndex424 == 1) {
+                Utf8 charSequence424;
+                Object oldString424 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(424);
+                if (oldString424 instanceof Utf8) {
+                    charSequence424 = (decoder).readString(((Utf8) oldString424));
+                } else {
+                    charSequence424 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, charSequence424);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F424': "+ unionIndex424));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex425 = (decoder.readIndex());
+        if (unionIndex425 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, null);
+        } else {
+            if (unionIndex425 == 1) {
+                Utf8 charSequence425;
+                Object oldString425 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(425);
+                if (oldString425 instanceof Utf8) {
+                    charSequence425 = (decoder).readString(((Utf8) oldString425));
+                } else {
+                    charSequence425 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, charSequence425);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F425': "+ unionIndex425));
+            }
+        }
+        int unionIndex426 = (decoder.readIndex());
+        if (unionIndex426 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, null);
+        } else {
+            if (unionIndex426 == 1) {
+                Utf8 charSequence426;
+                Object oldString426 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(426);
+                if (oldString426 instanceof Utf8) {
+                    charSequence426 = (decoder).readString(((Utf8) oldString426));
+                } else {
+                    charSequence426 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, charSequence426);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F426': "+ unionIndex426));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex427 = (decoder.readIndex());
+        if (unionIndex427 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, null);
+        } else {
+            if (unionIndex427 == 1) {
+                Utf8 charSequence427;
+                Object oldString427 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(427);
+                if (oldString427 instanceof Utf8) {
+                    charSequence427 = (decoder).readString(((Utf8) oldString427));
+                } else {
+                    charSequence427 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, charSequence427);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F427': "+ unionIndex427));
+            }
+        }
+        int unionIndex428 = (decoder.readIndex());
+        if (unionIndex428 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, null);
+        } else {
+            if (unionIndex428 == 1) {
+                Utf8 charSequence428;
+                Object oldString428 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(428);
+                if (oldString428 instanceof Utf8) {
+                    charSequence428 = (decoder).readString(((Utf8) oldString428));
+                } else {
+                    charSequence428 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, charSequence428);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F428': "+ unionIndex428));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex429 = (decoder.readIndex());
+        if (unionIndex429 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, null);
+        } else {
+            if (unionIndex429 == 1) {
+                Utf8 charSequence429;
+                Object oldString429 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(429);
+                if (oldString429 instanceof Utf8) {
+                    charSequence429 = (decoder).readString(((Utf8) oldString429));
+                } else {
+                    charSequence429 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, charSequence429);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F429': "+ unionIndex429));
+            }
+        }
+        int unionIndex430 = (decoder.readIndex());
+        if (unionIndex430 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, null);
+        } else {
+            if (unionIndex430 == 1) {
+                Utf8 charSequence430;
+                Object oldString430 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(430);
+                if (oldString430 instanceof Utf8) {
+                    charSequence430 = (decoder).readString(((Utf8) oldString430));
+                } else {
+                    charSequence430 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, charSequence430);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F430': "+ unionIndex430));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex431 = (decoder.readIndex());
+        if (unionIndex431 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, null);
+        } else {
+            if (unionIndex431 == 1) {
+                Utf8 charSequence431;
+                Object oldString431 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(431);
+                if (oldString431 instanceof Utf8) {
+                    charSequence431 = (decoder).readString(((Utf8) oldString431));
+                } else {
+                    charSequence431 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, charSequence431);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F431': "+ unionIndex431));
+            }
+        }
+        int unionIndex432 = (decoder.readIndex());
+        if (unionIndex432 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, null);
+        } else {
+            if (unionIndex432 == 1) {
+                Utf8 charSequence432;
+                Object oldString432 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(432);
+                if (oldString432 instanceof Utf8) {
+                    charSequence432 = (decoder).readString(((Utf8) oldString432));
+                } else {
+                    charSequence432 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, charSequence432);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F432': "+ unionIndex432));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex433 = (decoder.readIndex());
+        if (unionIndex433 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, null);
+        } else {
+            if (unionIndex433 == 1) {
+                Utf8 charSequence433;
+                Object oldString433 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(433);
+                if (oldString433 instanceof Utf8) {
+                    charSequence433 = (decoder).readString(((Utf8) oldString433));
+                } else {
+                    charSequence433 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, charSequence433);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F433': "+ unionIndex433));
+            }
+        }
+        int unionIndex434 = (decoder.readIndex());
+        if (unionIndex434 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, null);
+        } else {
+            if (unionIndex434 == 1) {
+                Utf8 charSequence434;
+                Object oldString434 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(434);
+                if (oldString434 instanceof Utf8) {
+                    charSequence434 = (decoder).readString(((Utf8) oldString434));
+                } else {
+                    charSequence434 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, charSequence434);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F434': "+ unionIndex434));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex435 = (decoder.readIndex());
+        if (unionIndex435 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, null);
+        } else {
+            if (unionIndex435 == 1) {
+                Utf8 charSequence435;
+                Object oldString435 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(435);
+                if (oldString435 instanceof Utf8) {
+                    charSequence435 = (decoder).readString(((Utf8) oldString435));
+                } else {
+                    charSequence435 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, charSequence435);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F435': "+ unionIndex435));
+            }
+        }
+        int unionIndex436 = (decoder.readIndex());
+        if (unionIndex436 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, null);
+        } else {
+            if (unionIndex436 == 1) {
+                Utf8 charSequence436;
+                Object oldString436 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(436);
+                if (oldString436 instanceof Utf8) {
+                    charSequence436 = (decoder).readString(((Utf8) oldString436));
+                } else {
+                    charSequence436 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, charSequence436);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F436': "+ unionIndex436));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex437 = (decoder.readIndex());
+        if (unionIndex437 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, null);
+        } else {
+            if (unionIndex437 == 1) {
+                Utf8 charSequence437;
+                Object oldString437 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(437);
+                if (oldString437 instanceof Utf8) {
+                    charSequence437 = (decoder).readString(((Utf8) oldString437));
+                } else {
+                    charSequence437 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, charSequence437);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F437': "+ unionIndex437));
+            }
+        }
+        int unionIndex438 = (decoder.readIndex());
+        if (unionIndex438 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, null);
+        } else {
+            if (unionIndex438 == 1) {
+                Utf8 charSequence438;
+                Object oldString438 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(438);
+                if (oldString438 instanceof Utf8) {
+                    charSequence438 = (decoder).readString(((Utf8) oldString438));
+                } else {
+                    charSequence438 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, charSequence438);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F438': "+ unionIndex438));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex439 = (decoder.readIndex());
+        if (unionIndex439 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, null);
+        } else {
+            if (unionIndex439 == 1) {
+                Utf8 charSequence439;
+                Object oldString439 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(439);
+                if (oldString439 instanceof Utf8) {
+                    charSequence439 = (decoder).readString(((Utf8) oldString439));
+                } else {
+                    charSequence439 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, charSequence439);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F439': "+ unionIndex439));
+            }
+        }
+        int unionIndex440 = (decoder.readIndex());
+        if (unionIndex440 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, null);
+        } else {
+            if (unionIndex440 == 1) {
+                Utf8 charSequence440;
+                Object oldString440 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(440);
+                if (oldString440 instanceof Utf8) {
+                    charSequence440 = (decoder).readString(((Utf8) oldString440));
+                } else {
+                    charSequence440 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, charSequence440);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F440': "+ unionIndex440));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex441 = (decoder.readIndex());
+        if (unionIndex441 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, null);
+        } else {
+            if (unionIndex441 == 1) {
+                Utf8 charSequence441;
+                Object oldString441 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(441);
+                if (oldString441 instanceof Utf8) {
+                    charSequence441 = (decoder).readString(((Utf8) oldString441));
+                } else {
+                    charSequence441 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, charSequence441);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F441': "+ unionIndex441));
+            }
+        }
+        int unionIndex442 = (decoder.readIndex());
+        if (unionIndex442 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, null);
+        } else {
+            if (unionIndex442 == 1) {
+                Utf8 charSequence442;
+                Object oldString442 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(442);
+                if (oldString442 instanceof Utf8) {
+                    charSequence442 = (decoder).readString(((Utf8) oldString442));
+                } else {
+                    charSequence442 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, charSequence442);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F442': "+ unionIndex442));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex443 = (decoder.readIndex());
+        if (unionIndex443 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, null);
+        } else {
+            if (unionIndex443 == 1) {
+                Utf8 charSequence443;
+                Object oldString443 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(443);
+                if (oldString443 instanceof Utf8) {
+                    charSequence443 = (decoder).readString(((Utf8) oldString443));
+                } else {
+                    charSequence443 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, charSequence443);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F443': "+ unionIndex443));
+            }
+        }
+        int unionIndex444 = (decoder.readIndex());
+        if (unionIndex444 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, null);
+        } else {
+            if (unionIndex444 == 1) {
+                Utf8 charSequence444;
+                Object oldString444 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(444);
+                if (oldString444 instanceof Utf8) {
+                    charSequence444 = (decoder).readString(((Utf8) oldString444));
+                } else {
+                    charSequence444 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, charSequence444);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F444': "+ unionIndex444));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex445 = (decoder.readIndex());
+        if (unionIndex445 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, null);
+        } else {
+            if (unionIndex445 == 1) {
+                Utf8 charSequence445;
+                Object oldString445 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(445);
+                if (oldString445 instanceof Utf8) {
+                    charSequence445 = (decoder).readString(((Utf8) oldString445));
+                } else {
+                    charSequence445 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, charSequence445);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F445': "+ unionIndex445));
+            }
+        }
+        int unionIndex446 = (decoder.readIndex());
+        if (unionIndex446 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, null);
+        } else {
+            if (unionIndex446 == 1) {
+                Utf8 charSequence446;
+                Object oldString446 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(446);
+                if (oldString446 instanceof Utf8) {
+                    charSequence446 = (decoder).readString(((Utf8) oldString446));
+                } else {
+                    charSequence446 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, charSequence446);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F446': "+ unionIndex446));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex447 = (decoder.readIndex());
+        if (unionIndex447 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, null);
+        } else {
+            if (unionIndex447 == 1) {
+                Utf8 charSequence447;
+                Object oldString447 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(447);
+                if (oldString447 instanceof Utf8) {
+                    charSequence447 = (decoder).readString(((Utf8) oldString447));
+                } else {
+                    charSequence447 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, charSequence447);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F447': "+ unionIndex447));
+            }
+        }
+        int unionIndex448 = (decoder.readIndex());
+        if (unionIndex448 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, null);
+        } else {
+            if (unionIndex448 == 1) {
+                Utf8 charSequence448;
+                Object oldString448 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(448);
+                if (oldString448 instanceof Utf8) {
+                    charSequence448 = (decoder).readString(((Utf8) oldString448));
+                } else {
+                    charSequence448 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, charSequence448);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F448': "+ unionIndex448));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex449 = (decoder.readIndex());
+        if (unionIndex449 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, null);
+        } else {
+            if (unionIndex449 == 1) {
+                Utf8 charSequence449;
+                Object oldString449 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(449);
+                if (oldString449 instanceof Utf8) {
+                    charSequence449 = (decoder).readString(((Utf8) oldString449));
+                } else {
+                    charSequence449 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, charSequence449);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F449': "+ unionIndex449));
+            }
+        }
+        int unionIndex450 = (decoder.readIndex());
+        if (unionIndex450 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, null);
+        } else {
+            if (unionIndex450 == 1) {
+                Utf8 charSequence450;
+                Object oldString450 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(450);
+                if (oldString450 instanceof Utf8) {
+                    charSequence450 = (decoder).readString(((Utf8) oldString450));
+                } else {
+                    charSequence450 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, charSequence450);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F450': "+ unionIndex450));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex451 = (decoder.readIndex());
+        if (unionIndex451 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, null);
+        } else {
+            if (unionIndex451 == 1) {
+                Utf8 charSequence451;
+                Object oldString451 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(451);
+                if (oldString451 instanceof Utf8) {
+                    charSequence451 = (decoder).readString(((Utf8) oldString451));
+                } else {
+                    charSequence451 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, charSequence451);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F451': "+ unionIndex451));
+            }
+        }
+        int unionIndex452 = (decoder.readIndex());
+        if (unionIndex452 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, null);
+        } else {
+            if (unionIndex452 == 1) {
+                Utf8 charSequence452;
+                Object oldString452 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(452);
+                if (oldString452 instanceof Utf8) {
+                    charSequence452 = (decoder).readString(((Utf8) oldString452));
+                } else {
+                    charSequence452 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, charSequence452);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F452': "+ unionIndex452));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex453 = (decoder.readIndex());
+        if (unionIndex453 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, null);
+        } else {
+            if (unionIndex453 == 1) {
+                Utf8 charSequence453;
+                Object oldString453 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(453);
+                if (oldString453 instanceof Utf8) {
+                    charSequence453 = (decoder).readString(((Utf8) oldString453));
+                } else {
+                    charSequence453 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, charSequence453);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F453': "+ unionIndex453));
+            }
+        }
+        int unionIndex454 = (decoder.readIndex());
+        if (unionIndex454 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, null);
+        } else {
+            if (unionIndex454 == 1) {
+                Utf8 charSequence454;
+                Object oldString454 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(454);
+                if (oldString454 instanceof Utf8) {
+                    charSequence454 = (decoder).readString(((Utf8) oldString454));
+                } else {
+                    charSequence454 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, charSequence454);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F454': "+ unionIndex454));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex455 = (decoder.readIndex());
+        if (unionIndex455 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, null);
+        } else {
+            if (unionIndex455 == 1) {
+                Utf8 charSequence455;
+                Object oldString455 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(455);
+                if (oldString455 instanceof Utf8) {
+                    charSequence455 = (decoder).readString(((Utf8) oldString455));
+                } else {
+                    charSequence455 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, charSequence455);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F455': "+ unionIndex455));
+            }
+        }
+        int unionIndex456 = (decoder.readIndex());
+        if (unionIndex456 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, null);
+        } else {
+            if (unionIndex456 == 1) {
+                Utf8 charSequence456;
+                Object oldString456 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(456);
+                if (oldString456 instanceof Utf8) {
+                    charSequence456 = (decoder).readString(((Utf8) oldString456));
+                } else {
+                    charSequence456 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, charSequence456);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F456': "+ unionIndex456));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex457 = (decoder.readIndex());
+        if (unionIndex457 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, null);
+        } else {
+            if (unionIndex457 == 1) {
+                Utf8 charSequence457;
+                Object oldString457 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(457);
+                if (oldString457 instanceof Utf8) {
+                    charSequence457 = (decoder).readString(((Utf8) oldString457));
+                } else {
+                    charSequence457 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, charSequence457);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F457': "+ unionIndex457));
+            }
+        }
+        int unionIndex458 = (decoder.readIndex());
+        if (unionIndex458 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, null);
+        } else {
+            if (unionIndex458 == 1) {
+                Utf8 charSequence458;
+                Object oldString458 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(458);
+                if (oldString458 instanceof Utf8) {
+                    charSequence458 = (decoder).readString(((Utf8) oldString458));
+                } else {
+                    charSequence458 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, charSequence458);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F458': "+ unionIndex458));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex459 = (decoder.readIndex());
+        if (unionIndex459 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, null);
+        } else {
+            if (unionIndex459 == 1) {
+                Utf8 charSequence459;
+                Object oldString459 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(459);
+                if (oldString459 instanceof Utf8) {
+                    charSequence459 = (decoder).readString(((Utf8) oldString459));
+                } else {
+                    charSequence459 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, charSequence459);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F459': "+ unionIndex459));
+            }
+        }
+        int unionIndex460 = (decoder.readIndex());
+        if (unionIndex460 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, null);
+        } else {
+            if (unionIndex460 == 1) {
+                Utf8 charSequence460;
+                Object oldString460 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(460);
+                if (oldString460 instanceof Utf8) {
+                    charSequence460 = (decoder).readString(((Utf8) oldString460));
+                } else {
+                    charSequence460 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, charSequence460);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F460': "+ unionIndex460));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex461 = (decoder.readIndex());
+        if (unionIndex461 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, null);
+        } else {
+            if (unionIndex461 == 1) {
+                Utf8 charSequence461;
+                Object oldString461 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(461);
+                if (oldString461 instanceof Utf8) {
+                    charSequence461 = (decoder).readString(((Utf8) oldString461));
+                } else {
+                    charSequence461 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, charSequence461);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F461': "+ unionIndex461));
+            }
+        }
+        int unionIndex462 = (decoder.readIndex());
+        if (unionIndex462 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, null);
+        } else {
+            if (unionIndex462 == 1) {
+                Utf8 charSequence462;
+                Object oldString462 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(462);
+                if (oldString462 instanceof Utf8) {
+                    charSequence462 = (decoder).readString(((Utf8) oldString462));
+                } else {
+                    charSequence462 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, charSequence462);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F462': "+ unionIndex462));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex463 = (decoder.readIndex());
+        if (unionIndex463 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, null);
+        } else {
+            if (unionIndex463 == 1) {
+                Utf8 charSequence463;
+                Object oldString463 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(463);
+                if (oldString463 instanceof Utf8) {
+                    charSequence463 = (decoder).readString(((Utf8) oldString463));
+                } else {
+                    charSequence463 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, charSequence463);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F463': "+ unionIndex463));
+            }
+        }
+        int unionIndex464 = (decoder.readIndex());
+        if (unionIndex464 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, null);
+        } else {
+            if (unionIndex464 == 1) {
+                Utf8 charSequence464;
+                Object oldString464 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(464);
+                if (oldString464 instanceof Utf8) {
+                    charSequence464 = (decoder).readString(((Utf8) oldString464));
+                } else {
+                    charSequence464 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, charSequence464);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F464': "+ unionIndex464));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex465 = (decoder.readIndex());
+        if (unionIndex465 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, null);
+        } else {
+            if (unionIndex465 == 1) {
+                Utf8 charSequence465;
+                Object oldString465 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(465);
+                if (oldString465 instanceof Utf8) {
+                    charSequence465 = (decoder).readString(((Utf8) oldString465));
+                } else {
+                    charSequence465 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, charSequence465);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F465': "+ unionIndex465));
+            }
+        }
+        int unionIndex466 = (decoder.readIndex());
+        if (unionIndex466 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, null);
+        } else {
+            if (unionIndex466 == 1) {
+                Utf8 charSequence466;
+                Object oldString466 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(466);
+                if (oldString466 instanceof Utf8) {
+                    charSequence466 = (decoder).readString(((Utf8) oldString466));
+                } else {
+                    charSequence466 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, charSequence466);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F466': "+ unionIndex466));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex467 = (decoder.readIndex());
+        if (unionIndex467 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, null);
+        } else {
+            if (unionIndex467 == 1) {
+                Utf8 charSequence467;
+                Object oldString467 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(467);
+                if (oldString467 instanceof Utf8) {
+                    charSequence467 = (decoder).readString(((Utf8) oldString467));
+                } else {
+                    charSequence467 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, charSequence467);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F467': "+ unionIndex467));
+            }
+        }
+        int unionIndex468 = (decoder.readIndex());
+        if (unionIndex468 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, null);
+        } else {
+            if (unionIndex468 == 1) {
+                Utf8 charSequence468;
+                Object oldString468 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(468);
+                if (oldString468 instanceof Utf8) {
+                    charSequence468 = (decoder).readString(((Utf8) oldString468));
+                } else {
+                    charSequence468 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, charSequence468);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F468': "+ unionIndex468));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex469 = (decoder.readIndex());
+        if (unionIndex469 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, null);
+        } else {
+            if (unionIndex469 == 1) {
+                Utf8 charSequence469;
+                Object oldString469 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(469);
+                if (oldString469 instanceof Utf8) {
+                    charSequence469 = (decoder).readString(((Utf8) oldString469));
+                } else {
+                    charSequence469 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, charSequence469);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F469': "+ unionIndex469));
+            }
+        }
+        int unionIndex470 = (decoder.readIndex());
+        if (unionIndex470 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, null);
+        } else {
+            if (unionIndex470 == 1) {
+                Utf8 charSequence470;
+                Object oldString470 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(470);
+                if (oldString470 instanceof Utf8) {
+                    charSequence470 = (decoder).readString(((Utf8) oldString470));
+                } else {
+                    charSequence470 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, charSequence470);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F470': "+ unionIndex470));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex471 = (decoder.readIndex());
+        if (unionIndex471 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, null);
+        } else {
+            if (unionIndex471 == 1) {
+                Utf8 charSequence471;
+                Object oldString471 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(471);
+                if (oldString471 instanceof Utf8) {
+                    charSequence471 = (decoder).readString(((Utf8) oldString471));
+                } else {
+                    charSequence471 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, charSequence471);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F471': "+ unionIndex471));
+            }
+        }
+        int unionIndex472 = (decoder.readIndex());
+        if (unionIndex472 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, null);
+        } else {
+            if (unionIndex472 == 1) {
+                Utf8 charSequence472;
+                Object oldString472 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(472);
+                if (oldString472 instanceof Utf8) {
+                    charSequence472 = (decoder).readString(((Utf8) oldString472));
+                } else {
+                    charSequence472 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, charSequence472);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F472': "+ unionIndex472));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex473 = (decoder.readIndex());
+        if (unionIndex473 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, null);
+        } else {
+            if (unionIndex473 == 1) {
+                Utf8 charSequence473;
+                Object oldString473 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(473);
+                if (oldString473 instanceof Utf8) {
+                    charSequence473 = (decoder).readString(((Utf8) oldString473));
+                } else {
+                    charSequence473 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, charSequence473);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F473': "+ unionIndex473));
+            }
+        }
+        int unionIndex474 = (decoder.readIndex());
+        if (unionIndex474 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, null);
+        } else {
+            if (unionIndex474 == 1) {
+                Utf8 charSequence474;
+                Object oldString474 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(474);
+                if (oldString474 instanceof Utf8) {
+                    charSequence474 = (decoder).readString(((Utf8) oldString474));
+                } else {
+                    charSequence474 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, charSequence474);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F474': "+ unionIndex474));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex475 = (decoder.readIndex());
+        if (unionIndex475 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, null);
+        } else {
+            if (unionIndex475 == 1) {
+                Utf8 charSequence475;
+                Object oldString475 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(475);
+                if (oldString475 instanceof Utf8) {
+                    charSequence475 = (decoder).readString(((Utf8) oldString475));
+                } else {
+                    charSequence475 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, charSequence475);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F475': "+ unionIndex475));
+            }
+        }
+        int unionIndex476 = (decoder.readIndex());
+        if (unionIndex476 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, null);
+        } else {
+            if (unionIndex476 == 1) {
+                Utf8 charSequence476;
+                Object oldString476 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(476);
+                if (oldString476 instanceof Utf8) {
+                    charSequence476 = (decoder).readString(((Utf8) oldString476));
+                } else {
+                    charSequence476 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, charSequence476);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F476': "+ unionIndex476));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex477 = (decoder.readIndex());
+        if (unionIndex477 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, null);
+        } else {
+            if (unionIndex477 == 1) {
+                Utf8 charSequence477;
+                Object oldString477 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(477);
+                if (oldString477 instanceof Utf8) {
+                    charSequence477 = (decoder).readString(((Utf8) oldString477));
+                } else {
+                    charSequence477 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, charSequence477);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F477': "+ unionIndex477));
+            }
+        }
+        int unionIndex478 = (decoder.readIndex());
+        if (unionIndex478 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, null);
+        } else {
+            if (unionIndex478 == 1) {
+                Utf8 charSequence478;
+                Object oldString478 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(478);
+                if (oldString478 instanceof Utf8) {
+                    charSequence478 = (decoder).readString(((Utf8) oldString478));
+                } else {
+                    charSequence478 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, charSequence478);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F478': "+ unionIndex478));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex479 = (decoder.readIndex());
+        if (unionIndex479 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, null);
+        } else {
+            if (unionIndex479 == 1) {
+                Utf8 charSequence479;
+                Object oldString479 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(479);
+                if (oldString479 instanceof Utf8) {
+                    charSequence479 = (decoder).readString(((Utf8) oldString479));
+                } else {
+                    charSequence479 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, charSequence479);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F479': "+ unionIndex479));
+            }
+        }
+        int unionIndex480 = (decoder.readIndex());
+        if (unionIndex480 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, null);
+        } else {
+            if (unionIndex480 == 1) {
+                Utf8 charSequence480;
+                Object oldString480 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(480);
+                if (oldString480 instanceof Utf8) {
+                    charSequence480 = (decoder).readString(((Utf8) oldString480));
+                } else {
+                    charSequence480 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, charSequence480);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F480': "+ unionIndex480));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex481 = (decoder.readIndex());
+        if (unionIndex481 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, null);
+        } else {
+            if (unionIndex481 == 1) {
+                Utf8 charSequence481;
+                Object oldString481 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(481);
+                if (oldString481 instanceof Utf8) {
+                    charSequence481 = (decoder).readString(((Utf8) oldString481));
+                } else {
+                    charSequence481 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, charSequence481);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F481': "+ unionIndex481));
+            }
+        }
+        int unionIndex482 = (decoder.readIndex());
+        if (unionIndex482 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, null);
+        } else {
+            if (unionIndex482 == 1) {
+                Utf8 charSequence482;
+                Object oldString482 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(482);
+                if (oldString482 instanceof Utf8) {
+                    charSequence482 = (decoder).readString(((Utf8) oldString482));
+                } else {
+                    charSequence482 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, charSequence482);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F482': "+ unionIndex482));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex483 = (decoder.readIndex());
+        if (unionIndex483 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, null);
+        } else {
+            if (unionIndex483 == 1) {
+                Utf8 charSequence483;
+                Object oldString483 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(483);
+                if (oldString483 instanceof Utf8) {
+                    charSequence483 = (decoder).readString(((Utf8) oldString483));
+                } else {
+                    charSequence483 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, charSequence483);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F483': "+ unionIndex483));
+            }
+        }
+        int unionIndex484 = (decoder.readIndex());
+        if (unionIndex484 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, null);
+        } else {
+            if (unionIndex484 == 1) {
+                Utf8 charSequence484;
+                Object oldString484 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(484);
+                if (oldString484 instanceof Utf8) {
+                    charSequence484 = (decoder).readString(((Utf8) oldString484));
+                } else {
+                    charSequence484 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, charSequence484);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F484': "+ unionIndex484));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex485 = (decoder.readIndex());
+        if (unionIndex485 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, null);
+        } else {
+            if (unionIndex485 == 1) {
+                Utf8 charSequence485;
+                Object oldString485 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(485);
+                if (oldString485 instanceof Utf8) {
+                    charSequence485 = (decoder).readString(((Utf8) oldString485));
+                } else {
+                    charSequence485 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, charSequence485);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F485': "+ unionIndex485));
+            }
+        }
+        int unionIndex486 = (decoder.readIndex());
+        if (unionIndex486 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, null);
+        } else {
+            if (unionIndex486 == 1) {
+                Utf8 charSequence486;
+                Object oldString486 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(486);
+                if (oldString486 instanceof Utf8) {
+                    charSequence486 = (decoder).readString(((Utf8) oldString486));
+                } else {
+                    charSequence486 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, charSequence486);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F486': "+ unionIndex486));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex487 = (decoder.readIndex());
+        if (unionIndex487 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, null);
+        } else {
+            if (unionIndex487 == 1) {
+                Utf8 charSequence487;
+                Object oldString487 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(487);
+                if (oldString487 instanceof Utf8) {
+                    charSequence487 = (decoder).readString(((Utf8) oldString487));
+                } else {
+                    charSequence487 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, charSequence487);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F487': "+ unionIndex487));
+            }
+        }
+        int unionIndex488 = (decoder.readIndex());
+        if (unionIndex488 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, null);
+        } else {
+            if (unionIndex488 == 1) {
+                Utf8 charSequence488;
+                Object oldString488 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(488);
+                if (oldString488 instanceof Utf8) {
+                    charSequence488 = (decoder).readString(((Utf8) oldString488));
+                } else {
+                    charSequence488 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, charSequence488);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F488': "+ unionIndex488));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex489 = (decoder.readIndex());
+        if (unionIndex489 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, null);
+        } else {
+            if (unionIndex489 == 1) {
+                Utf8 charSequence489;
+                Object oldString489 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(489);
+                if (oldString489 instanceof Utf8) {
+                    charSequence489 = (decoder).readString(((Utf8) oldString489));
+                } else {
+                    charSequence489 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, charSequence489);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F489': "+ unionIndex489));
+            }
+        }
+        int unionIndex490 = (decoder.readIndex());
+        if (unionIndex490 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, null);
+        } else {
+            if (unionIndex490 == 1) {
+                Utf8 charSequence490;
+                Object oldString490 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(490);
+                if (oldString490 instanceof Utf8) {
+                    charSequence490 = (decoder).readString(((Utf8) oldString490));
+                } else {
+                    charSequence490 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, charSequence490);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F490': "+ unionIndex490));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex491 = (decoder.readIndex());
+        if (unionIndex491 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, null);
+        } else {
+            if (unionIndex491 == 1) {
+                Utf8 charSequence491;
+                Object oldString491 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(491);
+                if (oldString491 instanceof Utf8) {
+                    charSequence491 = (decoder).readString(((Utf8) oldString491));
+                } else {
+                    charSequence491 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, charSequence491);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F491': "+ unionIndex491));
+            }
+        }
+        int unionIndex492 = (decoder.readIndex());
+        if (unionIndex492 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, null);
+        } else {
+            if (unionIndex492 == 1) {
+                Utf8 charSequence492;
+                Object oldString492 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(492);
+                if (oldString492 instanceof Utf8) {
+                    charSequence492 = (decoder).readString(((Utf8) oldString492));
+                } else {
+                    charSequence492 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, charSequence492);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F492': "+ unionIndex492));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex493 = (decoder.readIndex());
+        if (unionIndex493 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, null);
+        } else {
+            if (unionIndex493 == 1) {
+                Utf8 charSequence493;
+                Object oldString493 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(493);
+                if (oldString493 instanceof Utf8) {
+                    charSequence493 = (decoder).readString(((Utf8) oldString493));
+                } else {
+                    charSequence493 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, charSequence493);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F493': "+ unionIndex493));
+            }
+        }
+        int unionIndex494 = (decoder.readIndex());
+        if (unionIndex494 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, null);
+        } else {
+            if (unionIndex494 == 1) {
+                Utf8 charSequence494;
+                Object oldString494 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(494);
+                if (oldString494 instanceof Utf8) {
+                    charSequence494 = (decoder).readString(((Utf8) oldString494));
+                } else {
+                    charSequence494 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, charSequence494);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F494': "+ unionIndex494));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex495 = (decoder.readIndex());
+        if (unionIndex495 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, null);
+        } else {
+            if (unionIndex495 == 1) {
+                Utf8 charSequence495;
+                Object oldString495 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(495);
+                if (oldString495 instanceof Utf8) {
+                    charSequence495 = (decoder).readString(((Utf8) oldString495));
+                } else {
+                    charSequence495 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, charSequence495);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F495': "+ unionIndex495));
+            }
+        }
+        int unionIndex496 = (decoder.readIndex());
+        if (unionIndex496 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, null);
+        } else {
+            if (unionIndex496 == 1) {
+                Utf8 charSequence496;
+                Object oldString496 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(496);
+                if (oldString496 instanceof Utf8) {
+                    charSequence496 = (decoder).readString(((Utf8) oldString496));
+                } else {
+                    charSequence496 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, charSequence496);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F496': "+ unionIndex496));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex497 = (decoder.readIndex());
+        if (unionIndex497 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, null);
+        } else {
+            if (unionIndex497 == 1) {
+                Utf8 charSequence497;
+                Object oldString497 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(497);
+                if (oldString497 instanceof Utf8) {
+                    charSequence497 = (decoder).readString(((Utf8) oldString497));
+                } else {
+                    charSequence497 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, charSequence497);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F497': "+ unionIndex497));
+            }
+        }
+        int unionIndex498 = (decoder.readIndex());
+        if (unionIndex498 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, null);
+        } else {
+            if (unionIndex498 == 1) {
+                Utf8 charSequence498;
+                Object oldString498 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(498);
+                if (oldString498 instanceof Utf8) {
+                    charSequence498 = (decoder).readString(((Utf8) oldString498));
+                } else {
+                    charSequence498 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, charSequence498);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F498': "+ unionIndex498));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex499 = (decoder.readIndex());
+        if (unionIndex499 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, null);
+        } else {
+            if (unionIndex499 == 1) {
+                Utf8 charSequence499;
+                Object oldString499 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(499);
+                if (oldString499 instanceof Utf8) {
+                    charSequence499 = (decoder).readString(((Utf8) oldString499));
+                } else {
+                    charSequence499 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, charSequence499);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F499': "+ unionIndex499));
+            }
+        }
+        int unionIndex500 = (decoder.readIndex());
+        if (unionIndex500 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, null);
+        } else {
+            if (unionIndex500 == 1) {
+                Utf8 charSequence500;
+                Object oldString500 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(500);
+                if (oldString500 instanceof Utf8) {
+                    charSequence500 = (decoder).readString(((Utf8) oldString500));
+                } else {
+                    charSequence500 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, charSequence500);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F500': "+ unionIndex500));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex501 = (decoder.readIndex());
+        if (unionIndex501 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, null);
+        } else {
+            if (unionIndex501 == 1) {
+                Utf8 charSequence501;
+                Object oldString501 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(501);
+                if (oldString501 instanceof Utf8) {
+                    charSequence501 = (decoder).readString(((Utf8) oldString501));
+                } else {
+                    charSequence501 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, charSequence501);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F501': "+ unionIndex501));
+            }
+        }
+        int unionIndex502 = (decoder.readIndex());
+        if (unionIndex502 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, null);
+        } else {
+            if (unionIndex502 == 1) {
+                Utf8 charSequence502;
+                Object oldString502 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(502);
+                if (oldString502 instanceof Utf8) {
+                    charSequence502 = (decoder).readString(((Utf8) oldString502));
+                } else {
+                    charSequence502 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, charSequence502);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F502': "+ unionIndex502));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex503 = (decoder.readIndex());
+        if (unionIndex503 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, null);
+        } else {
+            if (unionIndex503 == 1) {
+                Utf8 charSequence503;
+                Object oldString503 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(503);
+                if (oldString503 instanceof Utf8) {
+                    charSequence503 = (decoder).readString(((Utf8) oldString503));
+                } else {
+                    charSequence503 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, charSequence503);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F503': "+ unionIndex503));
+            }
+        }
+        int unionIndex504 = (decoder.readIndex());
+        if (unionIndex504 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, null);
+        } else {
+            if (unionIndex504 == 1) {
+                Utf8 charSequence504;
+                Object oldString504 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(504);
+                if (oldString504 instanceof Utf8) {
+                    charSequence504 = (decoder).readString(((Utf8) oldString504));
+                } else {
+                    charSequence504 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, charSequence504);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F504': "+ unionIndex504));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex505 = (decoder.readIndex());
+        if (unionIndex505 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, null);
+        } else {
+            if (unionIndex505 == 1) {
+                Utf8 charSequence505;
+                Object oldString505 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(505);
+                if (oldString505 instanceof Utf8) {
+                    charSequence505 = (decoder).readString(((Utf8) oldString505));
+                } else {
+                    charSequence505 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, charSequence505);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F505': "+ unionIndex505));
+            }
+        }
+        int unionIndex506 = (decoder.readIndex());
+        if (unionIndex506 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, null);
+        } else {
+            if (unionIndex506 == 1) {
+                Utf8 charSequence506;
+                Object oldString506 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(506);
+                if (oldString506 instanceof Utf8) {
+                    charSequence506 = (decoder).readString(((Utf8) oldString506));
+                } else {
+                    charSequence506 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, charSequence506);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F506': "+ unionIndex506));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex507 = (decoder.readIndex());
+        if (unionIndex507 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, null);
+        } else {
+            if (unionIndex507 == 1) {
+                Utf8 charSequence507;
+                Object oldString507 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(507);
+                if (oldString507 instanceof Utf8) {
+                    charSequence507 = (decoder).readString(((Utf8) oldString507));
+                } else {
+                    charSequence507 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, charSequence507);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F507': "+ unionIndex507));
+            }
+        }
+        int unionIndex508 = (decoder.readIndex());
+        if (unionIndex508 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, null);
+        } else {
+            if (unionIndex508 == 1) {
+                Utf8 charSequence508;
+                Object oldString508 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(508);
+                if (oldString508 instanceof Utf8) {
+                    charSequence508 = (decoder).readString(((Utf8) oldString508));
+                } else {
+                    charSequence508 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, charSequence508);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F508': "+ unionIndex508));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex509 = (decoder.readIndex());
+        if (unionIndex509 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, null);
+        } else {
+            if (unionIndex509 == 1) {
+                Utf8 charSequence509;
+                Object oldString509 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(509);
+                if (oldString509 instanceof Utf8) {
+                    charSequence509 = (decoder).readString(((Utf8) oldString509));
+                } else {
+                    charSequence509 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, charSequence509);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F509': "+ unionIndex509));
+            }
+        }
+        int unionIndex510 = (decoder.readIndex());
+        if (unionIndex510 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, null);
+        } else {
+            if (unionIndex510 == 1) {
+                Utf8 charSequence510;
+                Object oldString510 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(510);
+                if (oldString510 instanceof Utf8) {
+                    charSequence510 = (decoder).readString(((Utf8) oldString510));
+                } else {
+                    charSequence510 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, charSequence510);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F510': "+ unionIndex510));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex511 = (decoder.readIndex());
+        if (unionIndex511 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, null);
+        } else {
+            if (unionIndex511 == 1) {
+                Utf8 charSequence511;
+                Object oldString511 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(511);
+                if (oldString511 instanceof Utf8) {
+                    charSequence511 = (decoder).readString(((Utf8) oldString511));
+                } else {
+                    charSequence511 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, charSequence511);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F511': "+ unionIndex511));
+            }
+        }
+        int unionIndex512 = (decoder.readIndex());
+        if (unionIndex512 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, null);
+        } else {
+            if (unionIndex512 == 1) {
+                Utf8 charSequence512;
+                Object oldString512 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(512);
+                if (oldString512 instanceof Utf8) {
+                    charSequence512 = (decoder).readString(((Utf8) oldString512));
+                } else {
+                    charSequence512 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, charSequence512);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F512': "+ unionIndex512));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex513 = (decoder.readIndex());
+        if (unionIndex513 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, null);
+        } else {
+            if (unionIndex513 == 1) {
+                Utf8 charSequence513;
+                Object oldString513 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(513);
+                if (oldString513 instanceof Utf8) {
+                    charSequence513 = (decoder).readString(((Utf8) oldString513));
+                } else {
+                    charSequence513 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, charSequence513);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F513': "+ unionIndex513));
+            }
+        }
+        int unionIndex514 = (decoder.readIndex());
+        if (unionIndex514 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, null);
+        } else {
+            if (unionIndex514 == 1) {
+                Utf8 charSequence514;
+                Object oldString514 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(514);
+                if (oldString514 instanceof Utf8) {
+                    charSequence514 = (decoder).readString(((Utf8) oldString514));
+                } else {
+                    charSequence514 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, charSequence514);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F514': "+ unionIndex514));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex515 = (decoder.readIndex());
+        if (unionIndex515 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, null);
+        } else {
+            if (unionIndex515 == 1) {
+                Utf8 charSequence515;
+                Object oldString515 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(515);
+                if (oldString515 instanceof Utf8) {
+                    charSequence515 = (decoder).readString(((Utf8) oldString515));
+                } else {
+                    charSequence515 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, charSequence515);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F515': "+ unionIndex515));
+            }
+        }
+        int unionIndex516 = (decoder.readIndex());
+        if (unionIndex516 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, null);
+        } else {
+            if (unionIndex516 == 1) {
+                Utf8 charSequence516;
+                Object oldString516 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(516);
+                if (oldString516 instanceof Utf8) {
+                    charSequence516 = (decoder).readString(((Utf8) oldString516));
+                } else {
+                    charSequence516 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, charSequence516);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F516': "+ unionIndex516));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex517 = (decoder.readIndex());
+        if (unionIndex517 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, null);
+        } else {
+            if (unionIndex517 == 1) {
+                Utf8 charSequence517;
+                Object oldString517 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(517);
+                if (oldString517 instanceof Utf8) {
+                    charSequence517 = (decoder).readString(((Utf8) oldString517));
+                } else {
+                    charSequence517 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, charSequence517);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F517': "+ unionIndex517));
+            }
+        }
+        int unionIndex518 = (decoder.readIndex());
+        if (unionIndex518 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, null);
+        } else {
+            if (unionIndex518 == 1) {
+                Utf8 charSequence518;
+                Object oldString518 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(518);
+                if (oldString518 instanceof Utf8) {
+                    charSequence518 = (decoder).readString(((Utf8) oldString518));
+                } else {
+                    charSequence518 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, charSequence518);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F518': "+ unionIndex518));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex519 = (decoder.readIndex());
+        if (unionIndex519 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, null);
+        } else {
+            if (unionIndex519 == 1) {
+                Utf8 charSequence519;
+                Object oldString519 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(519);
+                if (oldString519 instanceof Utf8) {
+                    charSequence519 = (decoder).readString(((Utf8) oldString519));
+                } else {
+                    charSequence519 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, charSequence519);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F519': "+ unionIndex519));
+            }
+        }
+        int unionIndex520 = (decoder.readIndex());
+        if (unionIndex520 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, null);
+        } else {
+            if (unionIndex520 == 1) {
+                Utf8 charSequence520;
+                Object oldString520 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(520);
+                if (oldString520 instanceof Utf8) {
+                    charSequence520 = (decoder).readString(((Utf8) oldString520));
+                } else {
+                    charSequence520 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, charSequence520);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F520': "+ unionIndex520));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex521 = (decoder.readIndex());
+        if (unionIndex521 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, null);
+        } else {
+            if (unionIndex521 == 1) {
+                Utf8 charSequence521;
+                Object oldString521 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(521);
+                if (oldString521 instanceof Utf8) {
+                    charSequence521 = (decoder).readString(((Utf8) oldString521));
+                } else {
+                    charSequence521 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, charSequence521);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F521': "+ unionIndex521));
+            }
+        }
+        int unionIndex522 = (decoder.readIndex());
+        if (unionIndex522 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, null);
+        } else {
+            if (unionIndex522 == 1) {
+                Utf8 charSequence522;
+                Object oldString522 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(522);
+                if (oldString522 instanceof Utf8) {
+                    charSequence522 = (decoder).readString(((Utf8) oldString522));
+                } else {
+                    charSequence522 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, charSequence522);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F522': "+ unionIndex522));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex523 = (decoder.readIndex());
+        if (unionIndex523 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, null);
+        } else {
+            if (unionIndex523 == 1) {
+                Utf8 charSequence523;
+                Object oldString523 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(523);
+                if (oldString523 instanceof Utf8) {
+                    charSequence523 = (decoder).readString(((Utf8) oldString523));
+                } else {
+                    charSequence523 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, charSequence523);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F523': "+ unionIndex523));
+            }
+        }
+        int unionIndex524 = (decoder.readIndex());
+        if (unionIndex524 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, null);
+        } else {
+            if (unionIndex524 == 1) {
+                Utf8 charSequence524;
+                Object oldString524 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(524);
+                if (oldString524 instanceof Utf8) {
+                    charSequence524 = (decoder).readString(((Utf8) oldString524));
+                } else {
+                    charSequence524 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, charSequence524);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F524': "+ unionIndex524));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex525 = (decoder.readIndex());
+        if (unionIndex525 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, null);
+        } else {
+            if (unionIndex525 == 1) {
+                Utf8 charSequence525;
+                Object oldString525 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(525);
+                if (oldString525 instanceof Utf8) {
+                    charSequence525 = (decoder).readString(((Utf8) oldString525));
+                } else {
+                    charSequence525 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, charSequence525);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F525': "+ unionIndex525));
+            }
+        }
+        int unionIndex526 = (decoder.readIndex());
+        if (unionIndex526 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, null);
+        } else {
+            if (unionIndex526 == 1) {
+                Utf8 charSequence526;
+                Object oldString526 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(526);
+                if (oldString526 instanceof Utf8) {
+                    charSequence526 = (decoder).readString(((Utf8) oldString526));
+                } else {
+                    charSequence526 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, charSequence526);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F526': "+ unionIndex526));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex527 = (decoder.readIndex());
+        if (unionIndex527 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, null);
+        } else {
+            if (unionIndex527 == 1) {
+                Utf8 charSequence527;
+                Object oldString527 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(527);
+                if (oldString527 instanceof Utf8) {
+                    charSequence527 = (decoder).readString(((Utf8) oldString527));
+                } else {
+                    charSequence527 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, charSequence527);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F527': "+ unionIndex527));
+            }
+        }
+        int unionIndex528 = (decoder.readIndex());
+        if (unionIndex528 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, null);
+        } else {
+            if (unionIndex528 == 1) {
+                Utf8 charSequence528;
+                Object oldString528 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(528);
+                if (oldString528 instanceof Utf8) {
+                    charSequence528 = (decoder).readString(((Utf8) oldString528));
+                } else {
+                    charSequence528 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, charSequence528);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F528': "+ unionIndex528));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex529 = (decoder.readIndex());
+        if (unionIndex529 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, null);
+        } else {
+            if (unionIndex529 == 1) {
+                Utf8 charSequence529;
+                Object oldString529 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(529);
+                if (oldString529 instanceof Utf8) {
+                    charSequence529 = (decoder).readString(((Utf8) oldString529));
+                } else {
+                    charSequence529 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, charSequence529);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F529': "+ unionIndex529));
+            }
+        }
+        int unionIndex530 = (decoder.readIndex());
+        if (unionIndex530 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, null);
+        } else {
+            if (unionIndex530 == 1) {
+                Utf8 charSequence530;
+                Object oldString530 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(530);
+                if (oldString530 instanceof Utf8) {
+                    charSequence530 = (decoder).readString(((Utf8) oldString530));
+                } else {
+                    charSequence530 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, charSequence530);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F530': "+ unionIndex530));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex531 = (decoder.readIndex());
+        if (unionIndex531 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, null);
+        } else {
+            if (unionIndex531 == 1) {
+                Utf8 charSequence531;
+                Object oldString531 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(531);
+                if (oldString531 instanceof Utf8) {
+                    charSequence531 = (decoder).readString(((Utf8) oldString531));
+                } else {
+                    charSequence531 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, charSequence531);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F531': "+ unionIndex531));
+            }
+        }
+        int unionIndex532 = (decoder.readIndex());
+        if (unionIndex532 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, null);
+        } else {
+            if (unionIndex532 == 1) {
+                Utf8 charSequence532;
+                Object oldString532 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(532);
+                if (oldString532 instanceof Utf8) {
+                    charSequence532 = (decoder).readString(((Utf8) oldString532));
+                } else {
+                    charSequence532 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, charSequence532);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F532': "+ unionIndex532));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex533 = (decoder.readIndex());
+        if (unionIndex533 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, null);
+        } else {
+            if (unionIndex533 == 1) {
+                Utf8 charSequence533;
+                Object oldString533 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(533);
+                if (oldString533 instanceof Utf8) {
+                    charSequence533 = (decoder).readString(((Utf8) oldString533));
+                } else {
+                    charSequence533 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, charSequence533);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F533': "+ unionIndex533));
+            }
+        }
+        int unionIndex534 = (decoder.readIndex());
+        if (unionIndex534 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, null);
+        } else {
+            if (unionIndex534 == 1) {
+                Utf8 charSequence534;
+                Object oldString534 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(534);
+                if (oldString534 instanceof Utf8) {
+                    charSequence534 = (decoder).readString(((Utf8) oldString534));
+                } else {
+                    charSequence534 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, charSequence534);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F534': "+ unionIndex534));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex535 = (decoder.readIndex());
+        if (unionIndex535 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, null);
+        } else {
+            if (unionIndex535 == 1) {
+                Utf8 charSequence535;
+                Object oldString535 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(535);
+                if (oldString535 instanceof Utf8) {
+                    charSequence535 = (decoder).readString(((Utf8) oldString535));
+                } else {
+                    charSequence535 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, charSequence535);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F535': "+ unionIndex535));
+            }
+        }
+        int unionIndex536 = (decoder.readIndex());
+        if (unionIndex536 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, null);
+        } else {
+            if (unionIndex536 == 1) {
+                Utf8 charSequence536;
+                Object oldString536 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(536);
+                if (oldString536 instanceof Utf8) {
+                    charSequence536 = (decoder).readString(((Utf8) oldString536));
+                } else {
+                    charSequence536 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, charSequence536);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F536': "+ unionIndex536));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex537 = (decoder.readIndex());
+        if (unionIndex537 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, null);
+        } else {
+            if (unionIndex537 == 1) {
+                Utf8 charSequence537;
+                Object oldString537 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(537);
+                if (oldString537 instanceof Utf8) {
+                    charSequence537 = (decoder).readString(((Utf8) oldString537));
+                } else {
+                    charSequence537 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, charSequence537);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F537': "+ unionIndex537));
+            }
+        }
+        int unionIndex538 = (decoder.readIndex());
+        if (unionIndex538 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, null);
+        } else {
+            if (unionIndex538 == 1) {
+                Utf8 charSequence538;
+                Object oldString538 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(538);
+                if (oldString538 instanceof Utf8) {
+                    charSequence538 = (decoder).readString(((Utf8) oldString538));
+                } else {
+                    charSequence538 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, charSequence538);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F538': "+ unionIndex538));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex539 = (decoder.readIndex());
+        if (unionIndex539 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, null);
+        } else {
+            if (unionIndex539 == 1) {
+                Utf8 charSequence539;
+                Object oldString539 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(539);
+                if (oldString539 instanceof Utf8) {
+                    charSequence539 = (decoder).readString(((Utf8) oldString539));
+                } else {
+                    charSequence539 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, charSequence539);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F539': "+ unionIndex539));
+            }
+        }
+        int unionIndex540 = (decoder.readIndex());
+        if (unionIndex540 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, null);
+        } else {
+            if (unionIndex540 == 1) {
+                Utf8 charSequence540;
+                Object oldString540 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(540);
+                if (oldString540 instanceof Utf8) {
+                    charSequence540 = (decoder).readString(((Utf8) oldString540));
+                } else {
+                    charSequence540 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, charSequence540);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F540': "+ unionIndex540));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex541 = (decoder.readIndex());
+        if (unionIndex541 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, null);
+        } else {
+            if (unionIndex541 == 1) {
+                Utf8 charSequence541;
+                Object oldString541 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(541);
+                if (oldString541 instanceof Utf8) {
+                    charSequence541 = (decoder).readString(((Utf8) oldString541));
+                } else {
+                    charSequence541 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, charSequence541);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F541': "+ unionIndex541));
+            }
+        }
+        int unionIndex542 = (decoder.readIndex());
+        if (unionIndex542 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, null);
+        } else {
+            if (unionIndex542 == 1) {
+                Utf8 charSequence542;
+                Object oldString542 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(542);
+                if (oldString542 instanceof Utf8) {
+                    charSequence542 = (decoder).readString(((Utf8) oldString542));
+                } else {
+                    charSequence542 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, charSequence542);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F542': "+ unionIndex542));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex543 = (decoder.readIndex());
+        if (unionIndex543 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, null);
+        } else {
+            if (unionIndex543 == 1) {
+                Utf8 charSequence543;
+                Object oldString543 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(543);
+                if (oldString543 instanceof Utf8) {
+                    charSequence543 = (decoder).readString(((Utf8) oldString543));
+                } else {
+                    charSequence543 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, charSequence543);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F543': "+ unionIndex543));
+            }
+        }
+        int unionIndex544 = (decoder.readIndex());
+        if (unionIndex544 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, null);
+        } else {
+            if (unionIndex544 == 1) {
+                Utf8 charSequence544;
+                Object oldString544 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(544);
+                if (oldString544 instanceof Utf8) {
+                    charSequence544 = (decoder).readString(((Utf8) oldString544));
+                } else {
+                    charSequence544 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, charSequence544);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F544': "+ unionIndex544));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex545 = (decoder.readIndex());
+        if (unionIndex545 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, null);
+        } else {
+            if (unionIndex545 == 1) {
+                Utf8 charSequence545;
+                Object oldString545 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(545);
+                if (oldString545 instanceof Utf8) {
+                    charSequence545 = (decoder).readString(((Utf8) oldString545));
+                } else {
+                    charSequence545 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, charSequence545);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F545': "+ unionIndex545));
+            }
+        }
+        int unionIndex546 = (decoder.readIndex());
+        if (unionIndex546 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, null);
+        } else {
+            if (unionIndex546 == 1) {
+                Utf8 charSequence546;
+                Object oldString546 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(546);
+                if (oldString546 instanceof Utf8) {
+                    charSequence546 = (decoder).readString(((Utf8) oldString546));
+                } else {
+                    charSequence546 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, charSequence546);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F546': "+ unionIndex546));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex547 = (decoder.readIndex());
+        if (unionIndex547 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, null);
+        } else {
+            if (unionIndex547 == 1) {
+                Utf8 charSequence547;
+                Object oldString547 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(547);
+                if (oldString547 instanceof Utf8) {
+                    charSequence547 = (decoder).readString(((Utf8) oldString547));
+                } else {
+                    charSequence547 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, charSequence547);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F547': "+ unionIndex547));
+            }
+        }
+        int unionIndex548 = (decoder.readIndex());
+        if (unionIndex548 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, null);
+        } else {
+            if (unionIndex548 == 1) {
+                Utf8 charSequence548;
+                Object oldString548 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(548);
+                if (oldString548 instanceof Utf8) {
+                    charSequence548 = (decoder).readString(((Utf8) oldString548));
+                } else {
+                    charSequence548 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, charSequence548);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F548': "+ unionIndex548));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex549 = (decoder.readIndex());
+        if (unionIndex549 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, null);
+        } else {
+            if (unionIndex549 == 1) {
+                Utf8 charSequence549;
+                Object oldString549 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(549);
+                if (oldString549 instanceof Utf8) {
+                    charSequence549 = (decoder).readString(((Utf8) oldString549));
+                } else {
+                    charSequence549 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, charSequence549);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F549': "+ unionIndex549));
+            }
+        }
+        int unionIndex550 = (decoder.readIndex());
+        if (unionIndex550 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, null);
+        } else {
+            if (unionIndex550 == 1) {
+                Utf8 charSequence550;
+                Object oldString550 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(550);
+                if (oldString550 instanceof Utf8) {
+                    charSequence550 = (decoder).readString(((Utf8) oldString550));
+                } else {
+                    charSequence550 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, charSequence550);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F550': "+ unionIndex550));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex551 = (decoder.readIndex());
+        if (unionIndex551 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, null);
+        } else {
+            if (unionIndex551 == 1) {
+                Utf8 charSequence551;
+                Object oldString551 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(551);
+                if (oldString551 instanceof Utf8) {
+                    charSequence551 = (decoder).readString(((Utf8) oldString551));
+                } else {
+                    charSequence551 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, charSequence551);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F551': "+ unionIndex551));
+            }
+        }
+        int unionIndex552 = (decoder.readIndex());
+        if (unionIndex552 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, null);
+        } else {
+            if (unionIndex552 == 1) {
+                Utf8 charSequence552;
+                Object oldString552 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(552);
+                if (oldString552 instanceof Utf8) {
+                    charSequence552 = (decoder).readString(((Utf8) oldString552));
+                } else {
+                    charSequence552 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, charSequence552);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F552': "+ unionIndex552));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex553 = (decoder.readIndex());
+        if (unionIndex553 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, null);
+        } else {
+            if (unionIndex553 == 1) {
+                Utf8 charSequence553;
+                Object oldString553 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(553);
+                if (oldString553 instanceof Utf8) {
+                    charSequence553 = (decoder).readString(((Utf8) oldString553));
+                } else {
+                    charSequence553 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, charSequence553);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F553': "+ unionIndex553));
+            }
+        }
+        int unionIndex554 = (decoder.readIndex());
+        if (unionIndex554 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, null);
+        } else {
+            if (unionIndex554 == 1) {
+                Utf8 charSequence554;
+                Object oldString554 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(554);
+                if (oldString554 instanceof Utf8) {
+                    charSequence554 = (decoder).readString(((Utf8) oldString554));
+                } else {
+                    charSequence554 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, charSequence554);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F554': "+ unionIndex554));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex555 = (decoder.readIndex());
+        if (unionIndex555 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, null);
+        } else {
+            if (unionIndex555 == 1) {
+                Utf8 charSequence555;
+                Object oldString555 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(555);
+                if (oldString555 instanceof Utf8) {
+                    charSequence555 = (decoder).readString(((Utf8) oldString555));
+                } else {
+                    charSequence555 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, charSequence555);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F555': "+ unionIndex555));
+            }
+        }
+        int unionIndex556 = (decoder.readIndex());
+        if (unionIndex556 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, null);
+        } else {
+            if (unionIndex556 == 1) {
+                Utf8 charSequence556;
+                Object oldString556 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(556);
+                if (oldString556 instanceof Utf8) {
+                    charSequence556 = (decoder).readString(((Utf8) oldString556));
+                } else {
+                    charSequence556 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, charSequence556);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F556': "+ unionIndex556));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex557 = (decoder.readIndex());
+        if (unionIndex557 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, null);
+        } else {
+            if (unionIndex557 == 1) {
+                Utf8 charSequence557;
+                Object oldString557 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(557);
+                if (oldString557 instanceof Utf8) {
+                    charSequence557 = (decoder).readString(((Utf8) oldString557));
+                } else {
+                    charSequence557 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, charSequence557);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F557': "+ unionIndex557));
+            }
+        }
+        int unionIndex558 = (decoder.readIndex());
+        if (unionIndex558 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, null);
+        } else {
+            if (unionIndex558 == 1) {
+                Utf8 charSequence558;
+                Object oldString558 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(558);
+                if (oldString558 instanceof Utf8) {
+                    charSequence558 = (decoder).readString(((Utf8) oldString558));
+                } else {
+                    charSequence558 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, charSequence558);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F558': "+ unionIndex558));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex559 = (decoder.readIndex());
+        if (unionIndex559 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, null);
+        } else {
+            if (unionIndex559 == 1) {
+                Utf8 charSequence559;
+                Object oldString559 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(559);
+                if (oldString559 instanceof Utf8) {
+                    charSequence559 = (decoder).readString(((Utf8) oldString559));
+                } else {
+                    charSequence559 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, charSequence559);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F559': "+ unionIndex559));
+            }
+        }
+        int unionIndex560 = (decoder.readIndex());
+        if (unionIndex560 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, null);
+        } else {
+            if (unionIndex560 == 1) {
+                Utf8 charSequence560;
+                Object oldString560 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(560);
+                if (oldString560 instanceof Utf8) {
+                    charSequence560 = (decoder).readString(((Utf8) oldString560));
+                } else {
+                    charSequence560 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, charSequence560);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F560': "+ unionIndex560));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex561 = (decoder.readIndex());
+        if (unionIndex561 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, null);
+        } else {
+            if (unionIndex561 == 1) {
+                Utf8 charSequence561;
+                Object oldString561 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(561);
+                if (oldString561 instanceof Utf8) {
+                    charSequence561 = (decoder).readString(((Utf8) oldString561));
+                } else {
+                    charSequence561 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, charSequence561);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F561': "+ unionIndex561));
+            }
+        }
+        int unionIndex562 = (decoder.readIndex());
+        if (unionIndex562 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, null);
+        } else {
+            if (unionIndex562 == 1) {
+                Utf8 charSequence562;
+                Object oldString562 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(562);
+                if (oldString562 instanceof Utf8) {
+                    charSequence562 = (decoder).readString(((Utf8) oldString562));
+                } else {
+                    charSequence562 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, charSequence562);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F562': "+ unionIndex562));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex563 = (decoder.readIndex());
+        if (unionIndex563 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, null);
+        } else {
+            if (unionIndex563 == 1) {
+                Utf8 charSequence563;
+                Object oldString563 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(563);
+                if (oldString563 instanceof Utf8) {
+                    charSequence563 = (decoder).readString(((Utf8) oldString563));
+                } else {
+                    charSequence563 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, charSequence563);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F563': "+ unionIndex563));
+            }
+        }
+        int unionIndex564 = (decoder.readIndex());
+        if (unionIndex564 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, null);
+        } else {
+            if (unionIndex564 == 1) {
+                Utf8 charSequence564;
+                Object oldString564 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(564);
+                if (oldString564 instanceof Utf8) {
+                    charSequence564 = (decoder).readString(((Utf8) oldString564));
+                } else {
+                    charSequence564 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, charSequence564);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F564': "+ unionIndex564));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex565 = (decoder.readIndex());
+        if (unionIndex565 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, null);
+        } else {
+            if (unionIndex565 == 1) {
+                Utf8 charSequence565;
+                Object oldString565 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(565);
+                if (oldString565 instanceof Utf8) {
+                    charSequence565 = (decoder).readString(((Utf8) oldString565));
+                } else {
+                    charSequence565 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, charSequence565);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F565': "+ unionIndex565));
+            }
+        }
+        int unionIndex566 = (decoder.readIndex());
+        if (unionIndex566 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, null);
+        } else {
+            if (unionIndex566 == 1) {
+                Utf8 charSequence566;
+                Object oldString566 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(566);
+                if (oldString566 instanceof Utf8) {
+                    charSequence566 = (decoder).readString(((Utf8) oldString566));
+                } else {
+                    charSequence566 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, charSequence566);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F566': "+ unionIndex566));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex567 = (decoder.readIndex());
+        if (unionIndex567 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, null);
+        } else {
+            if (unionIndex567 == 1) {
+                Utf8 charSequence567;
+                Object oldString567 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(567);
+                if (oldString567 instanceof Utf8) {
+                    charSequence567 = (decoder).readString(((Utf8) oldString567));
+                } else {
+                    charSequence567 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, charSequence567);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F567': "+ unionIndex567));
+            }
+        }
+        int unionIndex568 = (decoder.readIndex());
+        if (unionIndex568 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, null);
+        } else {
+            if (unionIndex568 == 1) {
+                Utf8 charSequence568;
+                Object oldString568 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(568);
+                if (oldString568 instanceof Utf8) {
+                    charSequence568 = (decoder).readString(((Utf8) oldString568));
+                } else {
+                    charSequence568 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, charSequence568);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F568': "+ unionIndex568));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex569 = (decoder.readIndex());
+        if (unionIndex569 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, null);
+        } else {
+            if (unionIndex569 == 1) {
+                Utf8 charSequence569;
+                Object oldString569 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(569);
+                if (oldString569 instanceof Utf8) {
+                    charSequence569 = (decoder).readString(((Utf8) oldString569));
+                } else {
+                    charSequence569 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, charSequence569);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F569': "+ unionIndex569));
+            }
+        }
+        int unionIndex570 = (decoder.readIndex());
+        if (unionIndex570 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, null);
+        } else {
+            if (unionIndex570 == 1) {
+                Utf8 charSequence570;
+                Object oldString570 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(570);
+                if (oldString570 instanceof Utf8) {
+                    charSequence570 = (decoder).readString(((Utf8) oldString570));
+                } else {
+                    charSequence570 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, charSequence570);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F570': "+ unionIndex570));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex571 = (decoder.readIndex());
+        if (unionIndex571 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, null);
+        } else {
+            if (unionIndex571 == 1) {
+                Utf8 charSequence571;
+                Object oldString571 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(571);
+                if (oldString571 instanceof Utf8) {
+                    charSequence571 = (decoder).readString(((Utf8) oldString571));
+                } else {
+                    charSequence571 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, charSequence571);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F571': "+ unionIndex571));
+            }
+        }
+        int unionIndex572 = (decoder.readIndex());
+        if (unionIndex572 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, null);
+        } else {
+            if (unionIndex572 == 1) {
+                Utf8 charSequence572;
+                Object oldString572 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(572);
+                if (oldString572 instanceof Utf8) {
+                    charSequence572 = (decoder).readString(((Utf8) oldString572));
+                } else {
+                    charSequence572 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, charSequence572);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F572': "+ unionIndex572));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex573 = (decoder.readIndex());
+        if (unionIndex573 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, null);
+        } else {
+            if (unionIndex573 == 1) {
+                Utf8 charSequence573;
+                Object oldString573 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(573);
+                if (oldString573 instanceof Utf8) {
+                    charSequence573 = (decoder).readString(((Utf8) oldString573));
+                } else {
+                    charSequence573 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, charSequence573);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F573': "+ unionIndex573));
+            }
+        }
+        int unionIndex574 = (decoder.readIndex());
+        if (unionIndex574 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, null);
+        } else {
+            if (unionIndex574 == 1) {
+                Utf8 charSequence574;
+                Object oldString574 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(574);
+                if (oldString574 instanceof Utf8) {
+                    charSequence574 = (decoder).readString(((Utf8) oldString574));
+                } else {
+                    charSequence574 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, charSequence574);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F574': "+ unionIndex574));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex575 = (decoder.readIndex());
+        if (unionIndex575 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, null);
+        } else {
+            if (unionIndex575 == 1) {
+                Utf8 charSequence575;
+                Object oldString575 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(575);
+                if (oldString575 instanceof Utf8) {
+                    charSequence575 = (decoder).readString(((Utf8) oldString575));
+                } else {
+                    charSequence575 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, charSequence575);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F575': "+ unionIndex575));
+            }
+        }
+        int unionIndex576 = (decoder.readIndex());
+        if (unionIndex576 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, null);
+        } else {
+            if (unionIndex576 == 1) {
+                Utf8 charSequence576;
+                Object oldString576 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(576);
+                if (oldString576 instanceof Utf8) {
+                    charSequence576 = (decoder).readString(((Utf8) oldString576));
+                } else {
+                    charSequence576 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, charSequence576);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F576': "+ unionIndex576));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex577 = (decoder.readIndex());
+        if (unionIndex577 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, null);
+        } else {
+            if (unionIndex577 == 1) {
+                Utf8 charSequence577;
+                Object oldString577 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(577);
+                if (oldString577 instanceof Utf8) {
+                    charSequence577 = (decoder).readString(((Utf8) oldString577));
+                } else {
+                    charSequence577 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, charSequence577);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F577': "+ unionIndex577));
+            }
+        }
+        int unionIndex578 = (decoder.readIndex());
+        if (unionIndex578 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, null);
+        } else {
+            if (unionIndex578 == 1) {
+                Utf8 charSequence578;
+                Object oldString578 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(578);
+                if (oldString578 instanceof Utf8) {
+                    charSequence578 = (decoder).readString(((Utf8) oldString578));
+                } else {
+                    charSequence578 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, charSequence578);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F578': "+ unionIndex578));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex579 = (decoder.readIndex());
+        if (unionIndex579 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, null);
+        } else {
+            if (unionIndex579 == 1) {
+                Utf8 charSequence579;
+                Object oldString579 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(579);
+                if (oldString579 instanceof Utf8) {
+                    charSequence579 = (decoder).readString(((Utf8) oldString579));
+                } else {
+                    charSequence579 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, charSequence579);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F579': "+ unionIndex579));
+            }
+        }
+        int unionIndex580 = (decoder.readIndex());
+        if (unionIndex580 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, null);
+        } else {
+            if (unionIndex580 == 1) {
+                Utf8 charSequence580;
+                Object oldString580 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(580);
+                if (oldString580 instanceof Utf8) {
+                    charSequence580 = (decoder).readString(((Utf8) oldString580));
+                } else {
+                    charSequence580 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, charSequence580);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F580': "+ unionIndex580));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex581 = (decoder.readIndex());
+        if (unionIndex581 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, null);
+        } else {
+            if (unionIndex581 == 1) {
+                Utf8 charSequence581;
+                Object oldString581 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(581);
+                if (oldString581 instanceof Utf8) {
+                    charSequence581 = (decoder).readString(((Utf8) oldString581));
+                } else {
+                    charSequence581 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, charSequence581);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F581': "+ unionIndex581));
+            }
+        }
+        int unionIndex582 = (decoder.readIndex());
+        if (unionIndex582 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, null);
+        } else {
+            if (unionIndex582 == 1) {
+                Utf8 charSequence582;
+                Object oldString582 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(582);
+                if (oldString582 instanceof Utf8) {
+                    charSequence582 = (decoder).readString(((Utf8) oldString582));
+                } else {
+                    charSequence582 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, charSequence582);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F582': "+ unionIndex582));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex583 = (decoder.readIndex());
+        if (unionIndex583 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, null);
+        } else {
+            if (unionIndex583 == 1) {
+                Utf8 charSequence583;
+                Object oldString583 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(583);
+                if (oldString583 instanceof Utf8) {
+                    charSequence583 = (decoder).readString(((Utf8) oldString583));
+                } else {
+                    charSequence583 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, charSequence583);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F583': "+ unionIndex583));
+            }
+        }
+        int unionIndex584 = (decoder.readIndex());
+        if (unionIndex584 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, null);
+        } else {
+            if (unionIndex584 == 1) {
+                Utf8 charSequence584;
+                Object oldString584 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(584);
+                if (oldString584 instanceof Utf8) {
+                    charSequence584 = (decoder).readString(((Utf8) oldString584));
+                } else {
+                    charSequence584 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, charSequence584);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F584': "+ unionIndex584));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex585 = (decoder.readIndex());
+        if (unionIndex585 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, null);
+        } else {
+            if (unionIndex585 == 1) {
+                Utf8 charSequence585;
+                Object oldString585 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(585);
+                if (oldString585 instanceof Utf8) {
+                    charSequence585 = (decoder).readString(((Utf8) oldString585));
+                } else {
+                    charSequence585 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, charSequence585);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F585': "+ unionIndex585));
+            }
+        }
+        int unionIndex586 = (decoder.readIndex());
+        if (unionIndex586 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, null);
+        } else {
+            if (unionIndex586 == 1) {
+                Utf8 charSequence586;
+                Object oldString586 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(586);
+                if (oldString586 instanceof Utf8) {
+                    charSequence586 = (decoder).readString(((Utf8) oldString586));
+                } else {
+                    charSequence586 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, charSequence586);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F586': "+ unionIndex586));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex587 = (decoder.readIndex());
+        if (unionIndex587 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, null);
+        } else {
+            if (unionIndex587 == 1) {
+                Utf8 charSequence587;
+                Object oldString587 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(587);
+                if (oldString587 instanceof Utf8) {
+                    charSequence587 = (decoder).readString(((Utf8) oldString587));
+                } else {
+                    charSequence587 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, charSequence587);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F587': "+ unionIndex587));
+            }
+        }
+        int unionIndex588 = (decoder.readIndex());
+        if (unionIndex588 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, null);
+        } else {
+            if (unionIndex588 == 1) {
+                Utf8 charSequence588;
+                Object oldString588 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(588);
+                if (oldString588 instanceof Utf8) {
+                    charSequence588 = (decoder).readString(((Utf8) oldString588));
+                } else {
+                    charSequence588 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, charSequence588);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F588': "+ unionIndex588));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex589 = (decoder.readIndex());
+        if (unionIndex589 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, null);
+        } else {
+            if (unionIndex589 == 1) {
+                Utf8 charSequence589;
+                Object oldString589 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(589);
+                if (oldString589 instanceof Utf8) {
+                    charSequence589 = (decoder).readString(((Utf8) oldString589));
+                } else {
+                    charSequence589 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, charSequence589);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F589': "+ unionIndex589));
+            }
+        }
+        int unionIndex590 = (decoder.readIndex());
+        if (unionIndex590 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, null);
+        } else {
+            if (unionIndex590 == 1) {
+                Utf8 charSequence590;
+                Object oldString590 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(590);
+                if (oldString590 instanceof Utf8) {
+                    charSequence590 = (decoder).readString(((Utf8) oldString590));
+                } else {
+                    charSequence590 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, charSequence590);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F590': "+ unionIndex590));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex591 = (decoder.readIndex());
+        if (unionIndex591 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, null);
+        } else {
+            if (unionIndex591 == 1) {
+                Utf8 charSequence591;
+                Object oldString591 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(591);
+                if (oldString591 instanceof Utf8) {
+                    charSequence591 = (decoder).readString(((Utf8) oldString591));
+                } else {
+                    charSequence591 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, charSequence591);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F591': "+ unionIndex591));
+            }
+        }
+        int unionIndex592 = (decoder.readIndex());
+        if (unionIndex592 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, null);
+        } else {
+            if (unionIndex592 == 1) {
+                Utf8 charSequence592;
+                Object oldString592 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(592);
+                if (oldString592 instanceof Utf8) {
+                    charSequence592 = (decoder).readString(((Utf8) oldString592));
+                } else {
+                    charSequence592 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, charSequence592);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F592': "+ unionIndex592));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex593 = (decoder.readIndex());
+        if (unionIndex593 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, null);
+        } else {
+            if (unionIndex593 == 1) {
+                Utf8 charSequence593;
+                Object oldString593 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(593);
+                if (oldString593 instanceof Utf8) {
+                    charSequence593 = (decoder).readString(((Utf8) oldString593));
+                } else {
+                    charSequence593 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, charSequence593);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F593': "+ unionIndex593));
+            }
+        }
+        int unionIndex594 = (decoder.readIndex());
+        if (unionIndex594 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, null);
+        } else {
+            if (unionIndex594 == 1) {
+                Utf8 charSequence594;
+                Object oldString594 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(594);
+                if (oldString594 instanceof Utf8) {
+                    charSequence594 = (decoder).readString(((Utf8) oldString594));
+                } else {
+                    charSequence594 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, charSequence594);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F594': "+ unionIndex594));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex595 = (decoder.readIndex());
+        if (unionIndex595 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, null);
+        } else {
+            if (unionIndex595 == 1) {
+                Utf8 charSequence595;
+                Object oldString595 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(595);
+                if (oldString595 instanceof Utf8) {
+                    charSequence595 = (decoder).readString(((Utf8) oldString595));
+                } else {
+                    charSequence595 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, charSequence595);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F595': "+ unionIndex595));
+            }
+        }
+        int unionIndex596 = (decoder.readIndex());
+        if (unionIndex596 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, null);
+        } else {
+            if (unionIndex596 == 1) {
+                Utf8 charSequence596;
+                Object oldString596 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(596);
+                if (oldString596 instanceof Utf8) {
+                    charSequence596 = (decoder).readString(((Utf8) oldString596));
+                } else {
+                    charSequence596 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, charSequence596);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F596': "+ unionIndex596));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex597 = (decoder.readIndex());
+        if (unionIndex597 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, null);
+        } else {
+            if (unionIndex597 == 1) {
+                Utf8 charSequence597;
+                Object oldString597 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(597);
+                if (oldString597 instanceof Utf8) {
+                    charSequence597 = (decoder).readString(((Utf8) oldString597));
+                } else {
+                    charSequence597 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, charSequence597);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F597': "+ unionIndex597));
+            }
+        }
+        int unionIndex598 = (decoder.readIndex());
+        if (unionIndex598 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, null);
+        } else {
+            if (unionIndex598 == 1) {
+                Utf8 charSequence598;
+                Object oldString598 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(598);
+                if (oldString598 instanceof Utf8) {
+                    charSequence598 = (decoder).readString(((Utf8) oldString598));
+                } else {
+                    charSequence598 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, charSequence598);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F598': "+ unionIndex598));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex599 = (decoder.readIndex());
+        if (unionIndex599 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, null);
+        } else {
+            if (unionIndex599 == 1) {
+                Utf8 charSequence599;
+                Object oldString599 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(599);
+                if (oldString599 instanceof Utf8) {
+                    charSequence599 = (decoder).readString(((Utf8) oldString599));
+                } else {
+                    charSequence599 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, charSequence599);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F599': "+ unionIndex599));
+            }
+        }
+        int unionIndex600 = (decoder.readIndex());
+        if (unionIndex600 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, null);
+        } else {
+            if (unionIndex600 == 1) {
+                Utf8 charSequence600;
+                Object oldString600 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(600);
+                if (oldString600 instanceof Utf8) {
+                    charSequence600 = (decoder).readString(((Utf8) oldString600));
+                } else {
+                    charSequence600 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, charSequence600);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F600': "+ unionIndex600));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex601 = (decoder.readIndex());
+        if (unionIndex601 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, null);
+        } else {
+            if (unionIndex601 == 1) {
+                Utf8 charSequence601;
+                Object oldString601 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(601);
+                if (oldString601 instanceof Utf8) {
+                    charSequence601 = (decoder).readString(((Utf8) oldString601));
+                } else {
+                    charSequence601 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, charSequence601);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F601': "+ unionIndex601));
+            }
+        }
+        int unionIndex602 = (decoder.readIndex());
+        if (unionIndex602 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, null);
+        } else {
+            if (unionIndex602 == 1) {
+                Utf8 charSequence602;
+                Object oldString602 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(602);
+                if (oldString602 instanceof Utf8) {
+                    charSequence602 = (decoder).readString(((Utf8) oldString602));
+                } else {
+                    charSequence602 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, charSequence602);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F602': "+ unionIndex602));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex603 = (decoder.readIndex());
+        if (unionIndex603 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, null);
+        } else {
+            if (unionIndex603 == 1) {
+                Utf8 charSequence603;
+                Object oldString603 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(603);
+                if (oldString603 instanceof Utf8) {
+                    charSequence603 = (decoder).readString(((Utf8) oldString603));
+                } else {
+                    charSequence603 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, charSequence603);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F603': "+ unionIndex603));
+            }
+        }
+        int unionIndex604 = (decoder.readIndex());
+        if (unionIndex604 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, null);
+        } else {
+            if (unionIndex604 == 1) {
+                Utf8 charSequence604;
+                Object oldString604 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(604);
+                if (oldString604 instanceof Utf8) {
+                    charSequence604 = (decoder).readString(((Utf8) oldString604));
+                } else {
+                    charSequence604 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, charSequence604);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F604': "+ unionIndex604));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex605 = (decoder.readIndex());
+        if (unionIndex605 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, null);
+        } else {
+            if (unionIndex605 == 1) {
+                Utf8 charSequence605;
+                Object oldString605 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(605);
+                if (oldString605 instanceof Utf8) {
+                    charSequence605 = (decoder).readString(((Utf8) oldString605));
+                } else {
+                    charSequence605 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, charSequence605);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F605': "+ unionIndex605));
+            }
+        }
+        int unionIndex606 = (decoder.readIndex());
+        if (unionIndex606 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, null);
+        } else {
+            if (unionIndex606 == 1) {
+                Utf8 charSequence606;
+                Object oldString606 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(606);
+                if (oldString606 instanceof Utf8) {
+                    charSequence606 = (decoder).readString(((Utf8) oldString606));
+                } else {
+                    charSequence606 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, charSequence606);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F606': "+ unionIndex606));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex607 = (decoder.readIndex());
+        if (unionIndex607 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, null);
+        } else {
+            if (unionIndex607 == 1) {
+                Utf8 charSequence607;
+                Object oldString607 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(607);
+                if (oldString607 instanceof Utf8) {
+                    charSequence607 = (decoder).readString(((Utf8) oldString607));
+                } else {
+                    charSequence607 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, charSequence607);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F607': "+ unionIndex607));
+            }
+        }
+        int unionIndex608 = (decoder.readIndex());
+        if (unionIndex608 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, null);
+        } else {
+            if (unionIndex608 == 1) {
+                Utf8 charSequence608;
+                Object oldString608 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(608);
+                if (oldString608 instanceof Utf8) {
+                    charSequence608 = (decoder).readString(((Utf8) oldString608));
+                } else {
+                    charSequence608 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, charSequence608);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F608': "+ unionIndex608));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex609 = (decoder.readIndex());
+        if (unionIndex609 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, null);
+        } else {
+            if (unionIndex609 == 1) {
+                Utf8 charSequence609;
+                Object oldString609 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(609);
+                if (oldString609 instanceof Utf8) {
+                    charSequence609 = (decoder).readString(((Utf8) oldString609));
+                } else {
+                    charSequence609 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, charSequence609);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F609': "+ unionIndex609));
+            }
+        }
+        int unionIndex610 = (decoder.readIndex());
+        if (unionIndex610 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, null);
+        } else {
+            if (unionIndex610 == 1) {
+                Utf8 charSequence610;
+                Object oldString610 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(610);
+                if (oldString610 instanceof Utf8) {
+                    charSequence610 = (decoder).readString(((Utf8) oldString610));
+                } else {
+                    charSequence610 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, charSequence610);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F610': "+ unionIndex610));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex611 = (decoder.readIndex());
+        if (unionIndex611 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, null);
+        } else {
+            if (unionIndex611 == 1) {
+                Utf8 charSequence611;
+                Object oldString611 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(611);
+                if (oldString611 instanceof Utf8) {
+                    charSequence611 = (decoder).readString(((Utf8) oldString611));
+                } else {
+                    charSequence611 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, charSequence611);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F611': "+ unionIndex611));
+            }
+        }
+        int unionIndex612 = (decoder.readIndex());
+        if (unionIndex612 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, null);
+        } else {
+            if (unionIndex612 == 1) {
+                Utf8 charSequence612;
+                Object oldString612 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(612);
+                if (oldString612 instanceof Utf8) {
+                    charSequence612 = (decoder).readString(((Utf8) oldString612));
+                } else {
+                    charSequence612 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, charSequence612);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F612': "+ unionIndex612));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex613 = (decoder.readIndex());
+        if (unionIndex613 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, null);
+        } else {
+            if (unionIndex613 == 1) {
+                Utf8 charSequence613;
+                Object oldString613 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(613);
+                if (oldString613 instanceof Utf8) {
+                    charSequence613 = (decoder).readString(((Utf8) oldString613));
+                } else {
+                    charSequence613 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, charSequence613);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F613': "+ unionIndex613));
+            }
+        }
+        int unionIndex614 = (decoder.readIndex());
+        if (unionIndex614 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, null);
+        } else {
+            if (unionIndex614 == 1) {
+                Utf8 charSequence614;
+                Object oldString614 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(614);
+                if (oldString614 instanceof Utf8) {
+                    charSequence614 = (decoder).readString(((Utf8) oldString614));
+                } else {
+                    charSequence614 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, charSequence614);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F614': "+ unionIndex614));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex615 = (decoder.readIndex());
+        if (unionIndex615 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, null);
+        } else {
+            if (unionIndex615 == 1) {
+                Utf8 charSequence615;
+                Object oldString615 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(615);
+                if (oldString615 instanceof Utf8) {
+                    charSequence615 = (decoder).readString(((Utf8) oldString615));
+                } else {
+                    charSequence615 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, charSequence615);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F615': "+ unionIndex615));
+            }
+        }
+        int unionIndex616 = (decoder.readIndex());
+        if (unionIndex616 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, null);
+        } else {
+            if (unionIndex616 == 1) {
+                Utf8 charSequence616;
+                Object oldString616 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(616);
+                if (oldString616 instanceof Utf8) {
+                    charSequence616 = (decoder).readString(((Utf8) oldString616));
+                } else {
+                    charSequence616 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, charSequence616);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F616': "+ unionIndex616));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex617 = (decoder.readIndex());
+        if (unionIndex617 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, null);
+        } else {
+            if (unionIndex617 == 1) {
+                Utf8 charSequence617;
+                Object oldString617 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(617);
+                if (oldString617 instanceof Utf8) {
+                    charSequence617 = (decoder).readString(((Utf8) oldString617));
+                } else {
+                    charSequence617 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, charSequence617);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F617': "+ unionIndex617));
+            }
+        }
+        int unionIndex618 = (decoder.readIndex());
+        if (unionIndex618 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, null);
+        } else {
+            if (unionIndex618 == 1) {
+                Utf8 charSequence618;
+                Object oldString618 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(618);
+                if (oldString618 instanceof Utf8) {
+                    charSequence618 = (decoder).readString(((Utf8) oldString618));
+                } else {
+                    charSequence618 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, charSequence618);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F618': "+ unionIndex618));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex619 = (decoder.readIndex());
+        if (unionIndex619 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, null);
+        } else {
+            if (unionIndex619 == 1) {
+                Utf8 charSequence619;
+                Object oldString619 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(619);
+                if (oldString619 instanceof Utf8) {
+                    charSequence619 = (decoder).readString(((Utf8) oldString619));
+                } else {
+                    charSequence619 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, charSequence619);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F619': "+ unionIndex619));
+            }
+        }
+        int unionIndex620 = (decoder.readIndex());
+        if (unionIndex620 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, null);
+        } else {
+            if (unionIndex620 == 1) {
+                Utf8 charSequence620;
+                Object oldString620 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(620);
+                if (oldString620 instanceof Utf8) {
+                    charSequence620 = (decoder).readString(((Utf8) oldString620));
+                } else {
+                    charSequence620 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, charSequence620);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F620': "+ unionIndex620));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex621 = (decoder.readIndex());
+        if (unionIndex621 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, null);
+        } else {
+            if (unionIndex621 == 1) {
+                Utf8 charSequence621;
+                Object oldString621 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(621);
+                if (oldString621 instanceof Utf8) {
+                    charSequence621 = (decoder).readString(((Utf8) oldString621));
+                } else {
+                    charSequence621 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, charSequence621);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F621': "+ unionIndex621));
+            }
+        }
+        int unionIndex622 = (decoder.readIndex());
+        if (unionIndex622 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, null);
+        } else {
+            if (unionIndex622 == 1) {
+                Utf8 charSequence622;
+                Object oldString622 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(622);
+                if (oldString622 instanceof Utf8) {
+                    charSequence622 = (decoder).readString(((Utf8) oldString622));
+                } else {
+                    charSequence622 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, charSequence622);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F622': "+ unionIndex622));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex623 = (decoder.readIndex());
+        if (unionIndex623 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, null);
+        } else {
+            if (unionIndex623 == 1) {
+                Utf8 charSequence623;
+                Object oldString623 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(623);
+                if (oldString623 instanceof Utf8) {
+                    charSequence623 = (decoder).readString(((Utf8) oldString623));
+                } else {
+                    charSequence623 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, charSequence623);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F623': "+ unionIndex623));
+            }
+        }
+        int unionIndex624 = (decoder.readIndex());
+        if (unionIndex624 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, null);
+        } else {
+            if (unionIndex624 == 1) {
+                Utf8 charSequence624;
+                Object oldString624 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(624);
+                if (oldString624 instanceof Utf8) {
+                    charSequence624 = (decoder).readString(((Utf8) oldString624));
+                } else {
+                    charSequence624 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, charSequence624);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F624': "+ unionIndex624));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex625 = (decoder.readIndex());
+        if (unionIndex625 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, null);
+        } else {
+            if (unionIndex625 == 1) {
+                Utf8 charSequence625;
+                Object oldString625 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(625);
+                if (oldString625 instanceof Utf8) {
+                    charSequence625 = (decoder).readString(((Utf8) oldString625));
+                } else {
+                    charSequence625 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, charSequence625);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F625': "+ unionIndex625));
+            }
+        }
+        int unionIndex626 = (decoder.readIndex());
+        if (unionIndex626 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, null);
+        } else {
+            if (unionIndex626 == 1) {
+                Utf8 charSequence626;
+                Object oldString626 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(626);
+                if (oldString626 instanceof Utf8) {
+                    charSequence626 = (decoder).readString(((Utf8) oldString626));
+                } else {
+                    charSequence626 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, charSequence626);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F626': "+ unionIndex626));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex627 = (decoder.readIndex());
+        if (unionIndex627 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, null);
+        } else {
+            if (unionIndex627 == 1) {
+                Utf8 charSequence627;
+                Object oldString627 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(627);
+                if (oldString627 instanceof Utf8) {
+                    charSequence627 = (decoder).readString(((Utf8) oldString627));
+                } else {
+                    charSequence627 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, charSequence627);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F627': "+ unionIndex627));
+            }
+        }
+        int unionIndex628 = (decoder.readIndex());
+        if (unionIndex628 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, null);
+        } else {
+            if (unionIndex628 == 1) {
+                Utf8 charSequence628;
+                Object oldString628 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(628);
+                if (oldString628 instanceof Utf8) {
+                    charSequence628 = (decoder).readString(((Utf8) oldString628));
+                } else {
+                    charSequence628 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, charSequence628);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F628': "+ unionIndex628));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex629 = (decoder.readIndex());
+        if (unionIndex629 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, null);
+        } else {
+            if (unionIndex629 == 1) {
+                Utf8 charSequence629;
+                Object oldString629 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(629);
+                if (oldString629 instanceof Utf8) {
+                    charSequence629 = (decoder).readString(((Utf8) oldString629));
+                } else {
+                    charSequence629 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, charSequence629);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F629': "+ unionIndex629));
+            }
+        }
+        int unionIndex630 = (decoder.readIndex());
+        if (unionIndex630 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, null);
+        } else {
+            if (unionIndex630 == 1) {
+                Utf8 charSequence630;
+                Object oldString630 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(630);
+                if (oldString630 instanceof Utf8) {
+                    charSequence630 = (decoder).readString(((Utf8) oldString630));
+                } else {
+                    charSequence630 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, charSequence630);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F630': "+ unionIndex630));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex631 = (decoder.readIndex());
+        if (unionIndex631 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, null);
+        } else {
+            if (unionIndex631 == 1) {
+                Utf8 charSequence631;
+                Object oldString631 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(631);
+                if (oldString631 instanceof Utf8) {
+                    charSequence631 = (decoder).readString(((Utf8) oldString631));
+                } else {
+                    charSequence631 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, charSequence631);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F631': "+ unionIndex631));
+            }
+        }
+        int unionIndex632 = (decoder.readIndex());
+        if (unionIndex632 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, null);
+        } else {
+            if (unionIndex632 == 1) {
+                Utf8 charSequence632;
+                Object oldString632 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(632);
+                if (oldString632 instanceof Utf8) {
+                    charSequence632 = (decoder).readString(((Utf8) oldString632));
+                } else {
+                    charSequence632 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, charSequence632);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F632': "+ unionIndex632));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex633 = (decoder.readIndex());
+        if (unionIndex633 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, null);
+        } else {
+            if (unionIndex633 == 1) {
+                Utf8 charSequence633;
+                Object oldString633 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(633);
+                if (oldString633 instanceof Utf8) {
+                    charSequence633 = (decoder).readString(((Utf8) oldString633));
+                } else {
+                    charSequence633 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, charSequence633);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F633': "+ unionIndex633));
+            }
+        }
+        int unionIndex634 = (decoder.readIndex());
+        if (unionIndex634 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, null);
+        } else {
+            if (unionIndex634 == 1) {
+                Utf8 charSequence634;
+                Object oldString634 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(634);
+                if (oldString634 instanceof Utf8) {
+                    charSequence634 = (decoder).readString(((Utf8) oldString634));
+                } else {
+                    charSequence634 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, charSequence634);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F634': "+ unionIndex634));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex635 = (decoder.readIndex());
+        if (unionIndex635 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, null);
+        } else {
+            if (unionIndex635 == 1) {
+                Utf8 charSequence635;
+                Object oldString635 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(635);
+                if (oldString635 instanceof Utf8) {
+                    charSequence635 = (decoder).readString(((Utf8) oldString635));
+                } else {
+                    charSequence635 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, charSequence635);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F635': "+ unionIndex635));
+            }
+        }
+        int unionIndex636 = (decoder.readIndex());
+        if (unionIndex636 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, null);
+        } else {
+            if (unionIndex636 == 1) {
+                Utf8 charSequence636;
+                Object oldString636 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(636);
+                if (oldString636 instanceof Utf8) {
+                    charSequence636 = (decoder).readString(((Utf8) oldString636));
+                } else {
+                    charSequence636 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, charSequence636);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F636': "+ unionIndex636));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex637 = (decoder.readIndex());
+        if (unionIndex637 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, null);
+        } else {
+            if (unionIndex637 == 1) {
+                Utf8 charSequence637;
+                Object oldString637 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(637);
+                if (oldString637 instanceof Utf8) {
+                    charSequence637 = (decoder).readString(((Utf8) oldString637));
+                } else {
+                    charSequence637 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, charSequence637);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F637': "+ unionIndex637));
+            }
+        }
+        int unionIndex638 = (decoder.readIndex());
+        if (unionIndex638 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, null);
+        } else {
+            if (unionIndex638 == 1) {
+                Utf8 charSequence638;
+                Object oldString638 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(638);
+                if (oldString638 instanceof Utf8) {
+                    charSequence638 = (decoder).readString(((Utf8) oldString638));
+                } else {
+                    charSequence638 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, charSequence638);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F638': "+ unionIndex638));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex639 = (decoder.readIndex());
+        if (unionIndex639 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, null);
+        } else {
+            if (unionIndex639 == 1) {
+                Utf8 charSequence639;
+                Object oldString639 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(639);
+                if (oldString639 instanceof Utf8) {
+                    charSequence639 = (decoder).readString(((Utf8) oldString639));
+                } else {
+                    charSequence639 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, charSequence639);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F639': "+ unionIndex639));
+            }
+        }
+        int unionIndex640 = (decoder.readIndex());
+        if (unionIndex640 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, null);
+        } else {
+            if (unionIndex640 == 1) {
+                Utf8 charSequence640;
+                Object oldString640 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(640);
+                if (oldString640 instanceof Utf8) {
+                    charSequence640 = (decoder).readString(((Utf8) oldString640));
+                } else {
+                    charSequence640 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, charSequence640);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F640': "+ unionIndex640));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex641 = (decoder.readIndex());
+        if (unionIndex641 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, null);
+        } else {
+            if (unionIndex641 == 1) {
+                Utf8 charSequence641;
+                Object oldString641 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(641);
+                if (oldString641 instanceof Utf8) {
+                    charSequence641 = (decoder).readString(((Utf8) oldString641));
+                } else {
+                    charSequence641 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, charSequence641);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F641': "+ unionIndex641));
+            }
+        }
+        int unionIndex642 = (decoder.readIndex());
+        if (unionIndex642 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, null);
+        } else {
+            if (unionIndex642 == 1) {
+                Utf8 charSequence642;
+                Object oldString642 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(642);
+                if (oldString642 instanceof Utf8) {
+                    charSequence642 = (decoder).readString(((Utf8) oldString642));
+                } else {
+                    charSequence642 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, charSequence642);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F642': "+ unionIndex642));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex643 = (decoder.readIndex());
+        if (unionIndex643 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, null);
+        } else {
+            if (unionIndex643 == 1) {
+                Utf8 charSequence643;
+                Object oldString643 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(643);
+                if (oldString643 instanceof Utf8) {
+                    charSequence643 = (decoder).readString(((Utf8) oldString643));
+                } else {
+                    charSequence643 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, charSequence643);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F643': "+ unionIndex643));
+            }
+        }
+        int unionIndex644 = (decoder.readIndex());
+        if (unionIndex644 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, null);
+        } else {
+            if (unionIndex644 == 1) {
+                Utf8 charSequence644;
+                Object oldString644 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(644);
+                if (oldString644 instanceof Utf8) {
+                    charSequence644 = (decoder).readString(((Utf8) oldString644));
+                } else {
+                    charSequence644 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, charSequence644);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F644': "+ unionIndex644));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex645 = (decoder.readIndex());
+        if (unionIndex645 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, null);
+        } else {
+            if (unionIndex645 == 1) {
+                Utf8 charSequence645;
+                Object oldString645 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(645);
+                if (oldString645 instanceof Utf8) {
+                    charSequence645 = (decoder).readString(((Utf8) oldString645));
+                } else {
+                    charSequence645 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, charSequence645);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F645': "+ unionIndex645));
+            }
+        }
+        int unionIndex646 = (decoder.readIndex());
+        if (unionIndex646 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, null);
+        } else {
+            if (unionIndex646 == 1) {
+                Utf8 charSequence646;
+                Object oldString646 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(646);
+                if (oldString646 instanceof Utf8) {
+                    charSequence646 = (decoder).readString(((Utf8) oldString646));
+                } else {
+                    charSequence646 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, charSequence646);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F646': "+ unionIndex646));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex647 = (decoder.readIndex());
+        if (unionIndex647 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, null);
+        } else {
+            if (unionIndex647 == 1) {
+                Utf8 charSequence647;
+                Object oldString647 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(647);
+                if (oldString647 instanceof Utf8) {
+                    charSequence647 = (decoder).readString(((Utf8) oldString647));
+                } else {
+                    charSequence647 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, charSequence647);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F647': "+ unionIndex647));
+            }
+        }
+        int unionIndex648 = (decoder.readIndex());
+        if (unionIndex648 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, null);
+        } else {
+            if (unionIndex648 == 1) {
+                Utf8 charSequence648;
+                Object oldString648 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(648);
+                if (oldString648 instanceof Utf8) {
+                    charSequence648 = (decoder).readString(((Utf8) oldString648));
+                } else {
+                    charSequence648 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, charSequence648);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F648': "+ unionIndex648));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex649 = (decoder.readIndex());
+        if (unionIndex649 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, null);
+        } else {
+            if (unionIndex649 == 1) {
+                Utf8 charSequence649;
+                Object oldString649 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(649);
+                if (oldString649 instanceof Utf8) {
+                    charSequence649 = (decoder).readString(((Utf8) oldString649));
+                } else {
+                    charSequence649 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, charSequence649);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F649': "+ unionIndex649));
+            }
+        }
+        int unionIndex650 = (decoder.readIndex());
+        if (unionIndex650 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, null);
+        } else {
+            if (unionIndex650 == 1) {
+                Utf8 charSequence650;
+                Object oldString650 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(650);
+                if (oldString650 instanceof Utf8) {
+                    charSequence650 = (decoder).readString(((Utf8) oldString650));
+                } else {
+                    charSequence650 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, charSequence650);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F650': "+ unionIndex650));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex651 = (decoder.readIndex());
+        if (unionIndex651 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, null);
+        } else {
+            if (unionIndex651 == 1) {
+                Utf8 charSequence651;
+                Object oldString651 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(651);
+                if (oldString651 instanceof Utf8) {
+                    charSequence651 = (decoder).readString(((Utf8) oldString651));
+                } else {
+                    charSequence651 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, charSequence651);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F651': "+ unionIndex651));
+            }
+        }
+        int unionIndex652 = (decoder.readIndex());
+        if (unionIndex652 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, null);
+        } else {
+            if (unionIndex652 == 1) {
+                Utf8 charSequence652;
+                Object oldString652 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(652);
+                if (oldString652 instanceof Utf8) {
+                    charSequence652 = (decoder).readString(((Utf8) oldString652));
+                } else {
+                    charSequence652 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, charSequence652);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F652': "+ unionIndex652));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex653 = (decoder.readIndex());
+        if (unionIndex653 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, null);
+        } else {
+            if (unionIndex653 == 1) {
+                Utf8 charSequence653;
+                Object oldString653 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(653);
+                if (oldString653 instanceof Utf8) {
+                    charSequence653 = (decoder).readString(((Utf8) oldString653));
+                } else {
+                    charSequence653 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, charSequence653);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F653': "+ unionIndex653));
+            }
+        }
+        int unionIndex654 = (decoder.readIndex());
+        if (unionIndex654 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, null);
+        } else {
+            if (unionIndex654 == 1) {
+                Utf8 charSequence654;
+                Object oldString654 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(654);
+                if (oldString654 instanceof Utf8) {
+                    charSequence654 = (decoder).readString(((Utf8) oldString654));
+                } else {
+                    charSequence654 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, charSequence654);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F654': "+ unionIndex654));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex655 = (decoder.readIndex());
+        if (unionIndex655 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, null);
+        } else {
+            if (unionIndex655 == 1) {
+                Utf8 charSequence655;
+                Object oldString655 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(655);
+                if (oldString655 instanceof Utf8) {
+                    charSequence655 = (decoder).readString(((Utf8) oldString655));
+                } else {
+                    charSequence655 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, charSequence655);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F655': "+ unionIndex655));
+            }
+        }
+        int unionIndex656 = (decoder.readIndex());
+        if (unionIndex656 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, null);
+        } else {
+            if (unionIndex656 == 1) {
+                Utf8 charSequence656;
+                Object oldString656 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(656);
+                if (oldString656 instanceof Utf8) {
+                    charSequence656 = (decoder).readString(((Utf8) oldString656));
+                } else {
+                    charSequence656 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, charSequence656);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F656': "+ unionIndex656));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex657 = (decoder.readIndex());
+        if (unionIndex657 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, null);
+        } else {
+            if (unionIndex657 == 1) {
+                Utf8 charSequence657;
+                Object oldString657 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(657);
+                if (oldString657 instanceof Utf8) {
+                    charSequence657 = (decoder).readString(((Utf8) oldString657));
+                } else {
+                    charSequence657 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, charSequence657);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F657': "+ unionIndex657));
+            }
+        }
+        int unionIndex658 = (decoder.readIndex());
+        if (unionIndex658 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, null);
+        } else {
+            if (unionIndex658 == 1) {
+                Utf8 charSequence658;
+                Object oldString658 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(658);
+                if (oldString658 instanceof Utf8) {
+                    charSequence658 = (decoder).readString(((Utf8) oldString658));
+                } else {
+                    charSequence658 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, charSequence658);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F658': "+ unionIndex658));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex659 = (decoder.readIndex());
+        if (unionIndex659 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, null);
+        } else {
+            if (unionIndex659 == 1) {
+                Utf8 charSequence659;
+                Object oldString659 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(659);
+                if (oldString659 instanceof Utf8) {
+                    charSequence659 = (decoder).readString(((Utf8) oldString659));
+                } else {
+                    charSequence659 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, charSequence659);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F659': "+ unionIndex659));
+            }
+        }
+        int unionIndex660 = (decoder.readIndex());
+        if (unionIndex660 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, null);
+        } else {
+            if (unionIndex660 == 1) {
+                Utf8 charSequence660;
+                Object oldString660 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(660);
+                if (oldString660 instanceof Utf8) {
+                    charSequence660 = (decoder).readString(((Utf8) oldString660));
+                } else {
+                    charSequence660 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, charSequence660);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F660': "+ unionIndex660));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex661 = (decoder.readIndex());
+        if (unionIndex661 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, null);
+        } else {
+            if (unionIndex661 == 1) {
+                Utf8 charSequence661;
+                Object oldString661 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(661);
+                if (oldString661 instanceof Utf8) {
+                    charSequence661 = (decoder).readString(((Utf8) oldString661));
+                } else {
+                    charSequence661 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, charSequence661);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F661': "+ unionIndex661));
+            }
+        }
+        int unionIndex662 = (decoder.readIndex());
+        if (unionIndex662 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, null);
+        } else {
+            if (unionIndex662 == 1) {
+                Utf8 charSequence662;
+                Object oldString662 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(662);
+                if (oldString662 instanceof Utf8) {
+                    charSequence662 = (decoder).readString(((Utf8) oldString662));
+                } else {
+                    charSequence662 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, charSequence662);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F662': "+ unionIndex662));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex663 = (decoder.readIndex());
+        if (unionIndex663 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, null);
+        } else {
+            if (unionIndex663 == 1) {
+                Utf8 charSequence663;
+                Object oldString663 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(663);
+                if (oldString663 instanceof Utf8) {
+                    charSequence663 = (decoder).readString(((Utf8) oldString663));
+                } else {
+                    charSequence663 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, charSequence663);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F663': "+ unionIndex663));
+            }
+        }
+        int unionIndex664 = (decoder.readIndex());
+        if (unionIndex664 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, null);
+        } else {
+            if (unionIndex664 == 1) {
+                Utf8 charSequence664;
+                Object oldString664 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(664);
+                if (oldString664 instanceof Utf8) {
+                    charSequence664 = (decoder).readString(((Utf8) oldString664));
+                } else {
+                    charSequence664 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, charSequence664);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F664': "+ unionIndex664));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex665 = (decoder.readIndex());
+        if (unionIndex665 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, null);
+        } else {
+            if (unionIndex665 == 1) {
+                Utf8 charSequence665;
+                Object oldString665 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(665);
+                if (oldString665 instanceof Utf8) {
+                    charSequence665 = (decoder).readString(((Utf8) oldString665));
+                } else {
+                    charSequence665 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, charSequence665);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F665': "+ unionIndex665));
+            }
+        }
+        int unionIndex666 = (decoder.readIndex());
+        if (unionIndex666 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, null);
+        } else {
+            if (unionIndex666 == 1) {
+                Utf8 charSequence666;
+                Object oldString666 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(666);
+                if (oldString666 instanceof Utf8) {
+                    charSequence666 = (decoder).readString(((Utf8) oldString666));
+                } else {
+                    charSequence666 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, charSequence666);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F666': "+ unionIndex666));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex667 = (decoder.readIndex());
+        if (unionIndex667 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, null);
+        } else {
+            if (unionIndex667 == 1) {
+                Utf8 charSequence667;
+                Object oldString667 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(667);
+                if (oldString667 instanceof Utf8) {
+                    charSequence667 = (decoder).readString(((Utf8) oldString667));
+                } else {
+                    charSequence667 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, charSequence667);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F667': "+ unionIndex667));
+            }
+        }
+        int unionIndex668 = (decoder.readIndex());
+        if (unionIndex668 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, null);
+        } else {
+            if (unionIndex668 == 1) {
+                Utf8 charSequence668;
+                Object oldString668 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(668);
+                if (oldString668 instanceof Utf8) {
+                    charSequence668 = (decoder).readString(((Utf8) oldString668));
+                } else {
+                    charSequence668 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, charSequence668);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F668': "+ unionIndex668));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex669 = (decoder.readIndex());
+        if (unionIndex669 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, null);
+        } else {
+            if (unionIndex669 == 1) {
+                Utf8 charSequence669;
+                Object oldString669 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(669);
+                if (oldString669 instanceof Utf8) {
+                    charSequence669 = (decoder).readString(((Utf8) oldString669));
+                } else {
+                    charSequence669 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, charSequence669);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F669': "+ unionIndex669));
+            }
+        }
+        int unionIndex670 = (decoder.readIndex());
+        if (unionIndex670 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, null);
+        } else {
+            if (unionIndex670 == 1) {
+                Utf8 charSequence670;
+                Object oldString670 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(670);
+                if (oldString670 instanceof Utf8) {
+                    charSequence670 = (decoder).readString(((Utf8) oldString670));
+                } else {
+                    charSequence670 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, charSequence670);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F670': "+ unionIndex670));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex671 = (decoder.readIndex());
+        if (unionIndex671 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, null);
+        } else {
+            if (unionIndex671 == 1) {
+                Utf8 charSequence671;
+                Object oldString671 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(671);
+                if (oldString671 instanceof Utf8) {
+                    charSequence671 = (decoder).readString(((Utf8) oldString671));
+                } else {
+                    charSequence671 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, charSequence671);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F671': "+ unionIndex671));
+            }
+        }
+        int unionIndex672 = (decoder.readIndex());
+        if (unionIndex672 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, null);
+        } else {
+            if (unionIndex672 == 1) {
+                Utf8 charSequence672;
+                Object oldString672 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(672);
+                if (oldString672 instanceof Utf8) {
+                    charSequence672 = (decoder).readString(((Utf8) oldString672));
+                } else {
+                    charSequence672 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, charSequence672);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F672': "+ unionIndex672));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex673 = (decoder.readIndex());
+        if (unionIndex673 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, null);
+        } else {
+            if (unionIndex673 == 1) {
+                Utf8 charSequence673;
+                Object oldString673 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(673);
+                if (oldString673 instanceof Utf8) {
+                    charSequence673 = (decoder).readString(((Utf8) oldString673));
+                } else {
+                    charSequence673 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, charSequence673);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F673': "+ unionIndex673));
+            }
+        }
+        int unionIndex674 = (decoder.readIndex());
+        if (unionIndex674 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, null);
+        } else {
+            if (unionIndex674 == 1) {
+                Utf8 charSequence674;
+                Object oldString674 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(674);
+                if (oldString674 instanceof Utf8) {
+                    charSequence674 = (decoder).readString(((Utf8) oldString674));
+                } else {
+                    charSequence674 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, charSequence674);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F674': "+ unionIndex674));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex675 = (decoder.readIndex());
+        if (unionIndex675 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, null);
+        } else {
+            if (unionIndex675 == 1) {
+                Utf8 charSequence675;
+                Object oldString675 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(675);
+                if (oldString675 instanceof Utf8) {
+                    charSequence675 = (decoder).readString(((Utf8) oldString675));
+                } else {
+                    charSequence675 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, charSequence675);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F675': "+ unionIndex675));
+            }
+        }
+        int unionIndex676 = (decoder.readIndex());
+        if (unionIndex676 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, null);
+        } else {
+            if (unionIndex676 == 1) {
+                Utf8 charSequence676;
+                Object oldString676 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(676);
+                if (oldString676 instanceof Utf8) {
+                    charSequence676 = (decoder).readString(((Utf8) oldString676));
+                } else {
+                    charSequence676 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, charSequence676);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F676': "+ unionIndex676));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex677 = (decoder.readIndex());
+        if (unionIndex677 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, null);
+        } else {
+            if (unionIndex677 == 1) {
+                Utf8 charSequence677;
+                Object oldString677 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(677);
+                if (oldString677 instanceof Utf8) {
+                    charSequence677 = (decoder).readString(((Utf8) oldString677));
+                } else {
+                    charSequence677 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, charSequence677);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F677': "+ unionIndex677));
+            }
+        }
+        int unionIndex678 = (decoder.readIndex());
+        if (unionIndex678 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, null);
+        } else {
+            if (unionIndex678 == 1) {
+                Utf8 charSequence678;
+                Object oldString678 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(678);
+                if (oldString678 instanceof Utf8) {
+                    charSequence678 = (decoder).readString(((Utf8) oldString678));
+                } else {
+                    charSequence678 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, charSequence678);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F678': "+ unionIndex678));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex679 = (decoder.readIndex());
+        if (unionIndex679 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, null);
+        } else {
+            if (unionIndex679 == 1) {
+                Utf8 charSequence679;
+                Object oldString679 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(679);
+                if (oldString679 instanceof Utf8) {
+                    charSequence679 = (decoder).readString(((Utf8) oldString679));
+                } else {
+                    charSequence679 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, charSequence679);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F679': "+ unionIndex679));
+            }
+        }
+        int unionIndex680 = (decoder.readIndex());
+        if (unionIndex680 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, null);
+        } else {
+            if (unionIndex680 == 1) {
+                Utf8 charSequence680;
+                Object oldString680 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(680);
+                if (oldString680 instanceof Utf8) {
+                    charSequence680 = (decoder).readString(((Utf8) oldString680));
+                } else {
+                    charSequence680 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, charSequence680);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F680': "+ unionIndex680));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex681 = (decoder.readIndex());
+        if (unionIndex681 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, null);
+        } else {
+            if (unionIndex681 == 1) {
+                Utf8 charSequence681;
+                Object oldString681 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(681);
+                if (oldString681 instanceof Utf8) {
+                    charSequence681 = (decoder).readString(((Utf8) oldString681));
+                } else {
+                    charSequence681 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, charSequence681);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F681': "+ unionIndex681));
+            }
+        }
+        int unionIndex682 = (decoder.readIndex());
+        if (unionIndex682 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, null);
+        } else {
+            if (unionIndex682 == 1) {
+                Utf8 charSequence682;
+                Object oldString682 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(682);
+                if (oldString682 instanceof Utf8) {
+                    charSequence682 = (decoder).readString(((Utf8) oldString682));
+                } else {
+                    charSequence682 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, charSequence682);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F682': "+ unionIndex682));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex683 = (decoder.readIndex());
+        if (unionIndex683 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, null);
+        } else {
+            if (unionIndex683 == 1) {
+                Utf8 charSequence683;
+                Object oldString683 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(683);
+                if (oldString683 instanceof Utf8) {
+                    charSequence683 = (decoder).readString(((Utf8) oldString683));
+                } else {
+                    charSequence683 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, charSequence683);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F683': "+ unionIndex683));
+            }
+        }
+        int unionIndex684 = (decoder.readIndex());
+        if (unionIndex684 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, null);
+        } else {
+            if (unionIndex684 == 1) {
+                Utf8 charSequence684;
+                Object oldString684 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(684);
+                if (oldString684 instanceof Utf8) {
+                    charSequence684 = (decoder).readString(((Utf8) oldString684));
+                } else {
+                    charSequence684 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, charSequence684);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F684': "+ unionIndex684));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex685 = (decoder.readIndex());
+        if (unionIndex685 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, null);
+        } else {
+            if (unionIndex685 == 1) {
+                Utf8 charSequence685;
+                Object oldString685 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(685);
+                if (oldString685 instanceof Utf8) {
+                    charSequence685 = (decoder).readString(((Utf8) oldString685));
+                } else {
+                    charSequence685 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, charSequence685);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F685': "+ unionIndex685));
+            }
+        }
+        int unionIndex686 = (decoder.readIndex());
+        if (unionIndex686 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, null);
+        } else {
+            if (unionIndex686 == 1) {
+                Utf8 charSequence686;
+                Object oldString686 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(686);
+                if (oldString686 instanceof Utf8) {
+                    charSequence686 = (decoder).readString(((Utf8) oldString686));
+                } else {
+                    charSequence686 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, charSequence686);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F686': "+ unionIndex686));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex687 = (decoder.readIndex());
+        if (unionIndex687 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, null);
+        } else {
+            if (unionIndex687 == 1) {
+                Utf8 charSequence687;
+                Object oldString687 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(687);
+                if (oldString687 instanceof Utf8) {
+                    charSequence687 = (decoder).readString(((Utf8) oldString687));
+                } else {
+                    charSequence687 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, charSequence687);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F687': "+ unionIndex687));
+            }
+        }
+        int unionIndex688 = (decoder.readIndex());
+        if (unionIndex688 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, null);
+        } else {
+            if (unionIndex688 == 1) {
+                Utf8 charSequence688;
+                Object oldString688 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(688);
+                if (oldString688 instanceof Utf8) {
+                    charSequence688 = (decoder).readString(((Utf8) oldString688));
+                } else {
+                    charSequence688 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, charSequence688);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F688': "+ unionIndex688));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex689 = (decoder.readIndex());
+        if (unionIndex689 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, null);
+        } else {
+            if (unionIndex689 == 1) {
+                Utf8 charSequence689;
+                Object oldString689 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(689);
+                if (oldString689 instanceof Utf8) {
+                    charSequence689 = (decoder).readString(((Utf8) oldString689));
+                } else {
+                    charSequence689 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, charSequence689);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F689': "+ unionIndex689));
+            }
+        }
+        int unionIndex690 = (decoder.readIndex());
+        if (unionIndex690 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, null);
+        } else {
+            if (unionIndex690 == 1) {
+                Utf8 charSequence690;
+                Object oldString690 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(690);
+                if (oldString690 instanceof Utf8) {
+                    charSequence690 = (decoder).readString(((Utf8) oldString690));
+                } else {
+                    charSequence690 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, charSequence690);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F690': "+ unionIndex690));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex691 = (decoder.readIndex());
+        if (unionIndex691 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, null);
+        } else {
+            if (unionIndex691 == 1) {
+                Utf8 charSequence691;
+                Object oldString691 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(691);
+                if (oldString691 instanceof Utf8) {
+                    charSequence691 = (decoder).readString(((Utf8) oldString691));
+                } else {
+                    charSequence691 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, charSequence691);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F691': "+ unionIndex691));
+            }
+        }
+        int unionIndex692 = (decoder.readIndex());
+        if (unionIndex692 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, null);
+        } else {
+            if (unionIndex692 == 1) {
+                Utf8 charSequence692;
+                Object oldString692 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(692);
+                if (oldString692 instanceof Utf8) {
+                    charSequence692 = (decoder).readString(((Utf8) oldString692));
+                } else {
+                    charSequence692 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, charSequence692);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F692': "+ unionIndex692));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex693 = (decoder.readIndex());
+        if (unionIndex693 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, null);
+        } else {
+            if (unionIndex693 == 1) {
+                Utf8 charSequence693;
+                Object oldString693 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(693);
+                if (oldString693 instanceof Utf8) {
+                    charSequence693 = (decoder).readString(((Utf8) oldString693));
+                } else {
+                    charSequence693 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, charSequence693);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F693': "+ unionIndex693));
+            }
+        }
+        int unionIndex694 = (decoder.readIndex());
+        if (unionIndex694 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, null);
+        } else {
+            if (unionIndex694 == 1) {
+                Utf8 charSequence694;
+                Object oldString694 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(694);
+                if (oldString694 instanceof Utf8) {
+                    charSequence694 = (decoder).readString(((Utf8) oldString694));
+                } else {
+                    charSequence694 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, charSequence694);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F694': "+ unionIndex694));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex695 = (decoder.readIndex());
+        if (unionIndex695 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, null);
+        } else {
+            if (unionIndex695 == 1) {
+                Utf8 charSequence695;
+                Object oldString695 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(695);
+                if (oldString695 instanceof Utf8) {
+                    charSequence695 = (decoder).readString(((Utf8) oldString695));
+                } else {
+                    charSequence695 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, charSequence695);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F695': "+ unionIndex695));
+            }
+        }
+        int unionIndex696 = (decoder.readIndex());
+        if (unionIndex696 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, null);
+        } else {
+            if (unionIndex696 == 1) {
+                Utf8 charSequence696;
+                Object oldString696 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(696);
+                if (oldString696 instanceof Utf8) {
+                    charSequence696 = (decoder).readString(((Utf8) oldString696));
+                } else {
+                    charSequence696 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, charSequence696);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F696': "+ unionIndex696));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex697 = (decoder.readIndex());
+        if (unionIndex697 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, null);
+        } else {
+            if (unionIndex697 == 1) {
+                Utf8 charSequence697;
+                Object oldString697 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(697);
+                if (oldString697 instanceof Utf8) {
+                    charSequence697 = (decoder).readString(((Utf8) oldString697));
+                } else {
+                    charSequence697 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, charSequence697);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F697': "+ unionIndex697));
+            }
+        }
+        int unionIndex698 = (decoder.readIndex());
+        if (unionIndex698 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, null);
+        } else {
+            if (unionIndex698 == 1) {
+                Utf8 charSequence698;
+                Object oldString698 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(698);
+                if (oldString698 instanceof Utf8) {
+                    charSequence698 = (decoder).readString(((Utf8) oldString698));
+                } else {
+                    charSequence698 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, charSequence698);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F698': "+ unionIndex698));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex699 = (decoder.readIndex());
+        if (unionIndex699 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, null);
+        } else {
+            if (unionIndex699 == 1) {
+                Utf8 charSequence699;
+                Object oldString699 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(699);
+                if (oldString699 instanceof Utf8) {
+                    charSequence699 = (decoder).readString(((Utf8) oldString699));
+                } else {
+                    charSequence699 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, charSequence699);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F699': "+ unionIndex699));
+            }
+        }
+        int unionIndex700 = (decoder.readIndex());
+        if (unionIndex700 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, null);
+        } else {
+            if (unionIndex700 == 1) {
+                Utf8 charSequence700;
+                Object oldString700 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(700);
+                if (oldString700 instanceof Utf8) {
+                    charSequence700 = (decoder).readString(((Utf8) oldString700));
+                } else {
+                    charSequence700 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, charSequence700);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F700': "+ unionIndex700));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex701 = (decoder.readIndex());
+        if (unionIndex701 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, null);
+        } else {
+            if (unionIndex701 == 1) {
+                Utf8 charSequence701;
+                Object oldString701 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(701);
+                if (oldString701 instanceof Utf8) {
+                    charSequence701 = (decoder).readString(((Utf8) oldString701));
+                } else {
+                    charSequence701 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, charSequence701);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F701': "+ unionIndex701));
+            }
+        }
+        int unionIndex702 = (decoder.readIndex());
+        if (unionIndex702 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, null);
+        } else {
+            if (unionIndex702 == 1) {
+                Utf8 charSequence702;
+                Object oldString702 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(702);
+                if (oldString702 instanceof Utf8) {
+                    charSequence702 = (decoder).readString(((Utf8) oldString702));
+                } else {
+                    charSequence702 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, charSequence702);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F702': "+ unionIndex702));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex703 = (decoder.readIndex());
+        if (unionIndex703 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, null);
+        } else {
+            if (unionIndex703 == 1) {
+                Utf8 charSequence703;
+                Object oldString703 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(703);
+                if (oldString703 instanceof Utf8) {
+                    charSequence703 = (decoder).readString(((Utf8) oldString703));
+                } else {
+                    charSequence703 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, charSequence703);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F703': "+ unionIndex703));
+            }
+        }
+        int unionIndex704 = (decoder.readIndex());
+        if (unionIndex704 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, null);
+        } else {
+            if (unionIndex704 == 1) {
+                Utf8 charSequence704;
+                Object oldString704 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(704);
+                if (oldString704 instanceof Utf8) {
+                    charSequence704 = (decoder).readString(((Utf8) oldString704));
+                } else {
+                    charSequence704 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, charSequence704);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F704': "+ unionIndex704));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex705 = (decoder.readIndex());
+        if (unionIndex705 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, null);
+        } else {
+            if (unionIndex705 == 1) {
+                Utf8 charSequence705;
+                Object oldString705 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(705);
+                if (oldString705 instanceof Utf8) {
+                    charSequence705 = (decoder).readString(((Utf8) oldString705));
+                } else {
+                    charSequence705 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, charSequence705);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F705': "+ unionIndex705));
+            }
+        }
+        int unionIndex706 = (decoder.readIndex());
+        if (unionIndex706 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, null);
+        } else {
+            if (unionIndex706 == 1) {
+                Utf8 charSequence706;
+                Object oldString706 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(706);
+                if (oldString706 instanceof Utf8) {
+                    charSequence706 = (decoder).readString(((Utf8) oldString706));
+                } else {
+                    charSequence706 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, charSequence706);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F706': "+ unionIndex706));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex707 = (decoder.readIndex());
+        if (unionIndex707 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, null);
+        } else {
+            if (unionIndex707 == 1) {
+                Utf8 charSequence707;
+                Object oldString707 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(707);
+                if (oldString707 instanceof Utf8) {
+                    charSequence707 = (decoder).readString(((Utf8) oldString707));
+                } else {
+                    charSequence707 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, charSequence707);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F707': "+ unionIndex707));
+            }
+        }
+        int unionIndex708 = (decoder.readIndex());
+        if (unionIndex708 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, null);
+        } else {
+            if (unionIndex708 == 1) {
+                Utf8 charSequence708;
+                Object oldString708 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(708);
+                if (oldString708 instanceof Utf8) {
+                    charSequence708 = (decoder).readString(((Utf8) oldString708));
+                } else {
+                    charSequence708 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, charSequence708);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F708': "+ unionIndex708));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex709 = (decoder.readIndex());
+        if (unionIndex709 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, null);
+        } else {
+            if (unionIndex709 == 1) {
+                Utf8 charSequence709;
+                Object oldString709 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(709);
+                if (oldString709 instanceof Utf8) {
+                    charSequence709 = (decoder).readString(((Utf8) oldString709));
+                } else {
+                    charSequence709 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, charSequence709);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F709': "+ unionIndex709));
+            }
+        }
+        int unionIndex710 = (decoder.readIndex());
+        if (unionIndex710 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, null);
+        } else {
+            if (unionIndex710 == 1) {
+                Utf8 charSequence710;
+                Object oldString710 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(710);
+                if (oldString710 instanceof Utf8) {
+                    charSequence710 = (decoder).readString(((Utf8) oldString710));
+                } else {
+                    charSequence710 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, charSequence710);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F710': "+ unionIndex710));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex711 = (decoder.readIndex());
+        if (unionIndex711 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, null);
+        } else {
+            if (unionIndex711 == 1) {
+                Utf8 charSequence711;
+                Object oldString711 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(711);
+                if (oldString711 instanceof Utf8) {
+                    charSequence711 = (decoder).readString(((Utf8) oldString711));
+                } else {
+                    charSequence711 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, charSequence711);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F711': "+ unionIndex711));
+            }
+        }
+        int unionIndex712 = (decoder.readIndex());
+        if (unionIndex712 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, null);
+        } else {
+            if (unionIndex712 == 1) {
+                Utf8 charSequence712;
+                Object oldString712 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(712);
+                if (oldString712 instanceof Utf8) {
+                    charSequence712 = (decoder).readString(((Utf8) oldString712));
+                } else {
+                    charSequence712 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, charSequence712);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F712': "+ unionIndex712));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex713 = (decoder.readIndex());
+        if (unionIndex713 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, null);
+        } else {
+            if (unionIndex713 == 1) {
+                Utf8 charSequence713;
+                Object oldString713 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(713);
+                if (oldString713 instanceof Utf8) {
+                    charSequence713 = (decoder).readString(((Utf8) oldString713));
+                } else {
+                    charSequence713 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, charSequence713);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F713': "+ unionIndex713));
+            }
+        }
+        int unionIndex714 = (decoder.readIndex());
+        if (unionIndex714 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, null);
+        } else {
+            if (unionIndex714 == 1) {
+                Utf8 charSequence714;
+                Object oldString714 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(714);
+                if (oldString714 instanceof Utf8) {
+                    charSequence714 = (decoder).readString(((Utf8) oldString714));
+                } else {
+                    charSequence714 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, charSequence714);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F714': "+ unionIndex714));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex715 = (decoder.readIndex());
+        if (unionIndex715 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, null);
+        } else {
+            if (unionIndex715 == 1) {
+                Utf8 charSequence715;
+                Object oldString715 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(715);
+                if (oldString715 instanceof Utf8) {
+                    charSequence715 = (decoder).readString(((Utf8) oldString715));
+                } else {
+                    charSequence715 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, charSequence715);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F715': "+ unionIndex715));
+            }
+        }
+        int unionIndex716 = (decoder.readIndex());
+        if (unionIndex716 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, null);
+        } else {
+            if (unionIndex716 == 1) {
+                Utf8 charSequence716;
+                Object oldString716 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(716);
+                if (oldString716 instanceof Utf8) {
+                    charSequence716 = (decoder).readString(((Utf8) oldString716));
+                } else {
+                    charSequence716 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, charSequence716);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F716': "+ unionIndex716));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex717 = (decoder.readIndex());
+        if (unionIndex717 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, null);
+        } else {
+            if (unionIndex717 == 1) {
+                Utf8 charSequence717;
+                Object oldString717 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(717);
+                if (oldString717 instanceof Utf8) {
+                    charSequence717 = (decoder).readString(((Utf8) oldString717));
+                } else {
+                    charSequence717 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, charSequence717);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F717': "+ unionIndex717));
+            }
+        }
+        int unionIndex718 = (decoder.readIndex());
+        if (unionIndex718 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, null);
+        } else {
+            if (unionIndex718 == 1) {
+                Utf8 charSequence718;
+                Object oldString718 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(718);
+                if (oldString718 instanceof Utf8) {
+                    charSequence718 = (decoder).readString(((Utf8) oldString718));
+                } else {
+                    charSequence718 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, charSequence718);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F718': "+ unionIndex718));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex719 = (decoder.readIndex());
+        if (unionIndex719 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, null);
+        } else {
+            if (unionIndex719 == 1) {
+                Utf8 charSequence719;
+                Object oldString719 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(719);
+                if (oldString719 instanceof Utf8) {
+                    charSequence719 = (decoder).readString(((Utf8) oldString719));
+                } else {
+                    charSequence719 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, charSequence719);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F719': "+ unionIndex719));
+            }
+        }
+        int unionIndex720 = (decoder.readIndex());
+        if (unionIndex720 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, null);
+        } else {
+            if (unionIndex720 == 1) {
+                Utf8 charSequence720;
+                Object oldString720 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(720);
+                if (oldString720 instanceof Utf8) {
+                    charSequence720 = (decoder).readString(((Utf8) oldString720));
+                } else {
+                    charSequence720 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, charSequence720);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F720': "+ unionIndex720));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex721 = (decoder.readIndex());
+        if (unionIndex721 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, null);
+        } else {
+            if (unionIndex721 == 1) {
+                Utf8 charSequence721;
+                Object oldString721 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(721);
+                if (oldString721 instanceof Utf8) {
+                    charSequence721 = (decoder).readString(((Utf8) oldString721));
+                } else {
+                    charSequence721 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, charSequence721);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F721': "+ unionIndex721));
+            }
+        }
+        int unionIndex722 = (decoder.readIndex());
+        if (unionIndex722 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, null);
+        } else {
+            if (unionIndex722 == 1) {
+                Utf8 charSequence722;
+                Object oldString722 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(722);
+                if (oldString722 instanceof Utf8) {
+                    charSequence722 = (decoder).readString(((Utf8) oldString722));
+                } else {
+                    charSequence722 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, charSequence722);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F722': "+ unionIndex722));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex723 = (decoder.readIndex());
+        if (unionIndex723 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, null);
+        } else {
+            if (unionIndex723 == 1) {
+                Utf8 charSequence723;
+                Object oldString723 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(723);
+                if (oldString723 instanceof Utf8) {
+                    charSequence723 = (decoder).readString(((Utf8) oldString723));
+                } else {
+                    charSequence723 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, charSequence723);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F723': "+ unionIndex723));
+            }
+        }
+        int unionIndex724 = (decoder.readIndex());
+        if (unionIndex724 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, null);
+        } else {
+            if (unionIndex724 == 1) {
+                Utf8 charSequence724;
+                Object oldString724 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(724);
+                if (oldString724 instanceof Utf8) {
+                    charSequence724 = (decoder).readString(((Utf8) oldString724));
+                } else {
+                    charSequence724 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, charSequence724);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F724': "+ unionIndex724));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex725 = (decoder.readIndex());
+        if (unionIndex725 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, null);
+        } else {
+            if (unionIndex725 == 1) {
+                Utf8 charSequence725;
+                Object oldString725 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(725);
+                if (oldString725 instanceof Utf8) {
+                    charSequence725 = (decoder).readString(((Utf8) oldString725));
+                } else {
+                    charSequence725 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, charSequence725);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F725': "+ unionIndex725));
+            }
+        }
+        int unionIndex726 = (decoder.readIndex());
+        if (unionIndex726 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, null);
+        } else {
+            if (unionIndex726 == 1) {
+                Utf8 charSequence726;
+                Object oldString726 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(726);
+                if (oldString726 instanceof Utf8) {
+                    charSequence726 = (decoder).readString(((Utf8) oldString726));
+                } else {
+                    charSequence726 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, charSequence726);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F726': "+ unionIndex726));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex727 = (decoder.readIndex());
+        if (unionIndex727 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, null);
+        } else {
+            if (unionIndex727 == 1) {
+                Utf8 charSequence727;
+                Object oldString727 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(727);
+                if (oldString727 instanceof Utf8) {
+                    charSequence727 = (decoder).readString(((Utf8) oldString727));
+                } else {
+                    charSequence727 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, charSequence727);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F727': "+ unionIndex727));
+            }
+        }
+        int unionIndex728 = (decoder.readIndex());
+        if (unionIndex728 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, null);
+        } else {
+            if (unionIndex728 == 1) {
+                Utf8 charSequence728;
+                Object oldString728 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(728);
+                if (oldString728 instanceof Utf8) {
+                    charSequence728 = (decoder).readString(((Utf8) oldString728));
+                } else {
+                    charSequence728 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, charSequence728);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F728': "+ unionIndex728));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex729 = (decoder.readIndex());
+        if (unionIndex729 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, null);
+        } else {
+            if (unionIndex729 == 1) {
+                Utf8 charSequence729;
+                Object oldString729 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(729);
+                if (oldString729 instanceof Utf8) {
+                    charSequence729 = (decoder).readString(((Utf8) oldString729));
+                } else {
+                    charSequence729 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, charSequence729);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F729': "+ unionIndex729));
+            }
+        }
+        int unionIndex730 = (decoder.readIndex());
+        if (unionIndex730 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, null);
+        } else {
+            if (unionIndex730 == 1) {
+                Utf8 charSequence730;
+                Object oldString730 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(730);
+                if (oldString730 instanceof Utf8) {
+                    charSequence730 = (decoder).readString(((Utf8) oldString730));
+                } else {
+                    charSequence730 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, charSequence730);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F730': "+ unionIndex730));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex731 = (decoder.readIndex());
+        if (unionIndex731 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, null);
+        } else {
+            if (unionIndex731 == 1) {
+                Utf8 charSequence731;
+                Object oldString731 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(731);
+                if (oldString731 instanceof Utf8) {
+                    charSequence731 = (decoder).readString(((Utf8) oldString731));
+                } else {
+                    charSequence731 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, charSequence731);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F731': "+ unionIndex731));
+            }
+        }
+        int unionIndex732 = (decoder.readIndex());
+        if (unionIndex732 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, null);
+        } else {
+            if (unionIndex732 == 1) {
+                Utf8 charSequence732;
+                Object oldString732 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(732);
+                if (oldString732 instanceof Utf8) {
+                    charSequence732 = (decoder).readString(((Utf8) oldString732));
+                } else {
+                    charSequence732 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, charSequence732);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F732': "+ unionIndex732));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex733 = (decoder.readIndex());
+        if (unionIndex733 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, null);
+        } else {
+            if (unionIndex733 == 1) {
+                Utf8 charSequence733;
+                Object oldString733 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(733);
+                if (oldString733 instanceof Utf8) {
+                    charSequence733 = (decoder).readString(((Utf8) oldString733));
+                } else {
+                    charSequence733 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, charSequence733);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F733': "+ unionIndex733));
+            }
+        }
+        int unionIndex734 = (decoder.readIndex());
+        if (unionIndex734 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, null);
+        } else {
+            if (unionIndex734 == 1) {
+                Utf8 charSequence734;
+                Object oldString734 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(734);
+                if (oldString734 instanceof Utf8) {
+                    charSequence734 = (decoder).readString(((Utf8) oldString734));
+                } else {
+                    charSequence734 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, charSequence734);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F734': "+ unionIndex734));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex735 = (decoder.readIndex());
+        if (unionIndex735 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, null);
+        } else {
+            if (unionIndex735 == 1) {
+                Utf8 charSequence735;
+                Object oldString735 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(735);
+                if (oldString735 instanceof Utf8) {
+                    charSequence735 = (decoder).readString(((Utf8) oldString735));
+                } else {
+                    charSequence735 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, charSequence735);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F735': "+ unionIndex735));
+            }
+        }
+        int unionIndex736 = (decoder.readIndex());
+        if (unionIndex736 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, null);
+        } else {
+            if (unionIndex736 == 1) {
+                Utf8 charSequence736;
+                Object oldString736 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(736);
+                if (oldString736 instanceof Utf8) {
+                    charSequence736 = (decoder).readString(((Utf8) oldString736));
+                } else {
+                    charSequence736 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, charSequence736);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F736': "+ unionIndex736));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex737 = (decoder.readIndex());
+        if (unionIndex737 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, null);
+        } else {
+            if (unionIndex737 == 1) {
+                Utf8 charSequence737;
+                Object oldString737 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(737);
+                if (oldString737 instanceof Utf8) {
+                    charSequence737 = (decoder).readString(((Utf8) oldString737));
+                } else {
+                    charSequence737 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, charSequence737);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F737': "+ unionIndex737));
+            }
+        }
+        int unionIndex738 = (decoder.readIndex());
+        if (unionIndex738 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, null);
+        } else {
+            if (unionIndex738 == 1) {
+                Utf8 charSequence738;
+                Object oldString738 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(738);
+                if (oldString738 instanceof Utf8) {
+                    charSequence738 = (decoder).readString(((Utf8) oldString738));
+                } else {
+                    charSequence738 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, charSequence738);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F738': "+ unionIndex738));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex739 = (decoder.readIndex());
+        if (unionIndex739 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, null);
+        } else {
+            if (unionIndex739 == 1) {
+                Utf8 charSequence739;
+                Object oldString739 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(739);
+                if (oldString739 instanceof Utf8) {
+                    charSequence739 = (decoder).readString(((Utf8) oldString739));
+                } else {
+                    charSequence739 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, charSequence739);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F739': "+ unionIndex739));
+            }
+        }
+        int unionIndex740 = (decoder.readIndex());
+        if (unionIndex740 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, null);
+        } else {
+            if (unionIndex740 == 1) {
+                Utf8 charSequence740;
+                Object oldString740 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(740);
+                if (oldString740 instanceof Utf8) {
+                    charSequence740 = (decoder).readString(((Utf8) oldString740));
+                } else {
+                    charSequence740 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, charSequence740);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F740': "+ unionIndex740));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex741 = (decoder.readIndex());
+        if (unionIndex741 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, null);
+        } else {
+            if (unionIndex741 == 1) {
+                Utf8 charSequence741;
+                Object oldString741 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(741);
+                if (oldString741 instanceof Utf8) {
+                    charSequence741 = (decoder).readString(((Utf8) oldString741));
+                } else {
+                    charSequence741 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, charSequence741);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F741': "+ unionIndex741));
+            }
+        }
+        int unionIndex742 = (decoder.readIndex());
+        if (unionIndex742 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, null);
+        } else {
+            if (unionIndex742 == 1) {
+                Utf8 charSequence742;
+                Object oldString742 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(742);
+                if (oldString742 instanceof Utf8) {
+                    charSequence742 = (decoder).readString(((Utf8) oldString742));
+                } else {
+                    charSequence742 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, charSequence742);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F742': "+ unionIndex742));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex743 = (decoder.readIndex());
+        if (unionIndex743 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, null);
+        } else {
+            if (unionIndex743 == 1) {
+                Utf8 charSequence743;
+                Object oldString743 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(743);
+                if (oldString743 instanceof Utf8) {
+                    charSequence743 = (decoder).readString(((Utf8) oldString743));
+                } else {
+                    charSequence743 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, charSequence743);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F743': "+ unionIndex743));
+            }
+        }
+        int unionIndex744 = (decoder.readIndex());
+        if (unionIndex744 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, null);
+        } else {
+            if (unionIndex744 == 1) {
+                Utf8 charSequence744;
+                Object oldString744 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(744);
+                if (oldString744 instanceof Utf8) {
+                    charSequence744 = (decoder).readString(((Utf8) oldString744));
+                } else {
+                    charSequence744 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, charSequence744);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F744': "+ unionIndex744));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex745 = (decoder.readIndex());
+        if (unionIndex745 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, null);
+        } else {
+            if (unionIndex745 == 1) {
+                Utf8 charSequence745;
+                Object oldString745 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(745);
+                if (oldString745 instanceof Utf8) {
+                    charSequence745 = (decoder).readString(((Utf8) oldString745));
+                } else {
+                    charSequence745 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, charSequence745);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F745': "+ unionIndex745));
+            }
+        }
+        int unionIndex746 = (decoder.readIndex());
+        if (unionIndex746 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, null);
+        } else {
+            if (unionIndex746 == 1) {
+                Utf8 charSequence746;
+                Object oldString746 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(746);
+                if (oldString746 instanceof Utf8) {
+                    charSequence746 = (decoder).readString(((Utf8) oldString746));
+                } else {
+                    charSequence746 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, charSequence746);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F746': "+ unionIndex746));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex747 = (decoder.readIndex());
+        if (unionIndex747 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, null);
+        } else {
+            if (unionIndex747 == 1) {
+                Utf8 charSequence747;
+                Object oldString747 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(747);
+                if (oldString747 instanceof Utf8) {
+                    charSequence747 = (decoder).readString(((Utf8) oldString747));
+                } else {
+                    charSequence747 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, charSequence747);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F747': "+ unionIndex747));
+            }
+        }
+        int unionIndex748 = (decoder.readIndex());
+        if (unionIndex748 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, null);
+        } else {
+            if (unionIndex748 == 1) {
+                Utf8 charSequence748;
+                Object oldString748 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(748);
+                if (oldString748 instanceof Utf8) {
+                    charSequence748 = (decoder).readString(((Utf8) oldString748));
+                } else {
+                    charSequence748 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, charSequence748);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F748': "+ unionIndex748));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex749 = (decoder.readIndex());
+        if (unionIndex749 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, null);
+        } else {
+            if (unionIndex749 == 1) {
+                Utf8 charSequence749;
+                Object oldString749 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(749);
+                if (oldString749 instanceof Utf8) {
+                    charSequence749 = (decoder).readString(((Utf8) oldString749));
+                } else {
+                    charSequence749 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, charSequence749);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F749': "+ unionIndex749));
+            }
+        }
+        int unionIndex750 = (decoder.readIndex());
+        if (unionIndex750 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, null);
+        } else {
+            if (unionIndex750 == 1) {
+                Utf8 charSequence750;
+                Object oldString750 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(750);
+                if (oldString750 instanceof Utf8) {
+                    charSequence750 = (decoder).readString(((Utf8) oldString750));
+                } else {
+                    charSequence750 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, charSequence750);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F750': "+ unionIndex750));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex751 = (decoder.readIndex());
+        if (unionIndex751 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, null);
+        } else {
+            if (unionIndex751 == 1) {
+                Utf8 charSequence751;
+                Object oldString751 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(751);
+                if (oldString751 instanceof Utf8) {
+                    charSequence751 = (decoder).readString(((Utf8) oldString751));
+                } else {
+                    charSequence751 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, charSequence751);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F751': "+ unionIndex751));
+            }
+        }
+        int unionIndex752 = (decoder.readIndex());
+        if (unionIndex752 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, null);
+        } else {
+            if (unionIndex752 == 1) {
+                Utf8 charSequence752;
+                Object oldString752 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(752);
+                if (oldString752 instanceof Utf8) {
+                    charSequence752 = (decoder).readString(((Utf8) oldString752));
+                } else {
+                    charSequence752 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, charSequence752);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F752': "+ unionIndex752));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex753 = (decoder.readIndex());
+        if (unionIndex753 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, null);
+        } else {
+            if (unionIndex753 == 1) {
+                Utf8 charSequence753;
+                Object oldString753 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(753);
+                if (oldString753 instanceof Utf8) {
+                    charSequence753 = (decoder).readString(((Utf8) oldString753));
+                } else {
+                    charSequence753 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, charSequence753);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F753': "+ unionIndex753));
+            }
+        }
+        int unionIndex754 = (decoder.readIndex());
+        if (unionIndex754 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, null);
+        } else {
+            if (unionIndex754 == 1) {
+                Utf8 charSequence754;
+                Object oldString754 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(754);
+                if (oldString754 instanceof Utf8) {
+                    charSequence754 = (decoder).readString(((Utf8) oldString754));
+                } else {
+                    charSequence754 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, charSequence754);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F754': "+ unionIndex754));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex755 = (decoder.readIndex());
+        if (unionIndex755 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, null);
+        } else {
+            if (unionIndex755 == 1) {
+                Utf8 charSequence755;
+                Object oldString755 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(755);
+                if (oldString755 instanceof Utf8) {
+                    charSequence755 = (decoder).readString(((Utf8) oldString755));
+                } else {
+                    charSequence755 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, charSequence755);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F755': "+ unionIndex755));
+            }
+        }
+        int unionIndex756 = (decoder.readIndex());
+        if (unionIndex756 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, null);
+        } else {
+            if (unionIndex756 == 1) {
+                Utf8 charSequence756;
+                Object oldString756 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(756);
+                if (oldString756 instanceof Utf8) {
+                    charSequence756 = (decoder).readString(((Utf8) oldString756));
+                } else {
+                    charSequence756 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, charSequence756);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F756': "+ unionIndex756));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex757 = (decoder.readIndex());
+        if (unionIndex757 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, null);
+        } else {
+            if (unionIndex757 == 1) {
+                Utf8 charSequence757;
+                Object oldString757 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(757);
+                if (oldString757 instanceof Utf8) {
+                    charSequence757 = (decoder).readString(((Utf8) oldString757));
+                } else {
+                    charSequence757 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, charSequence757);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F757': "+ unionIndex757));
+            }
+        }
+        int unionIndex758 = (decoder.readIndex());
+        if (unionIndex758 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, null);
+        } else {
+            if (unionIndex758 == 1) {
+                Utf8 charSequence758;
+                Object oldString758 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(758);
+                if (oldString758 instanceof Utf8) {
+                    charSequence758 = (decoder).readString(((Utf8) oldString758));
+                } else {
+                    charSequence758 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, charSequence758);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F758': "+ unionIndex758));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex759 = (decoder.readIndex());
+        if (unionIndex759 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, null);
+        } else {
+            if (unionIndex759 == 1) {
+                Utf8 charSequence759;
+                Object oldString759 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(759);
+                if (oldString759 instanceof Utf8) {
+                    charSequence759 = (decoder).readString(((Utf8) oldString759));
+                } else {
+                    charSequence759 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, charSequence759);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F759': "+ unionIndex759));
+            }
+        }
+        int unionIndex760 = (decoder.readIndex());
+        if (unionIndex760 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, null);
+        } else {
+            if (unionIndex760 == 1) {
+                Utf8 charSequence760;
+                Object oldString760 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(760);
+                if (oldString760 instanceof Utf8) {
+                    charSequence760 = (decoder).readString(((Utf8) oldString760));
+                } else {
+                    charSequence760 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, charSequence760);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F760': "+ unionIndex760));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex761 = (decoder.readIndex());
+        if (unionIndex761 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, null);
+        } else {
+            if (unionIndex761 == 1) {
+                Utf8 charSequence761;
+                Object oldString761 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(761);
+                if (oldString761 instanceof Utf8) {
+                    charSequence761 = (decoder).readString(((Utf8) oldString761));
+                } else {
+                    charSequence761 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, charSequence761);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F761': "+ unionIndex761));
+            }
+        }
+        int unionIndex762 = (decoder.readIndex());
+        if (unionIndex762 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, null);
+        } else {
+            if (unionIndex762 == 1) {
+                Utf8 charSequence762;
+                Object oldString762 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(762);
+                if (oldString762 instanceof Utf8) {
+                    charSequence762 = (decoder).readString(((Utf8) oldString762));
+                } else {
+                    charSequence762 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, charSequence762);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F762': "+ unionIndex762));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex763 = (decoder.readIndex());
+        if (unionIndex763 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, null);
+        } else {
+            if (unionIndex763 == 1) {
+                Utf8 charSequence763;
+                Object oldString763 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(763);
+                if (oldString763 instanceof Utf8) {
+                    charSequence763 = (decoder).readString(((Utf8) oldString763));
+                } else {
+                    charSequence763 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, charSequence763);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F763': "+ unionIndex763));
+            }
+        }
+        int unionIndex764 = (decoder.readIndex());
+        if (unionIndex764 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, null);
+        } else {
+            if (unionIndex764 == 1) {
+                Utf8 charSequence764;
+                Object oldString764 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(764);
+                if (oldString764 instanceof Utf8) {
+                    charSequence764 = (decoder).readString(((Utf8) oldString764));
+                } else {
+                    charSequence764 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, charSequence764);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F764': "+ unionIndex764));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex765 = (decoder.readIndex());
+        if (unionIndex765 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, null);
+        } else {
+            if (unionIndex765 == 1) {
+                Utf8 charSequence765;
+                Object oldString765 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(765);
+                if (oldString765 instanceof Utf8) {
+                    charSequence765 = (decoder).readString(((Utf8) oldString765));
+                } else {
+                    charSequence765 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, charSequence765);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F765': "+ unionIndex765));
+            }
+        }
+        int unionIndex766 = (decoder.readIndex());
+        if (unionIndex766 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, null);
+        } else {
+            if (unionIndex766 == 1) {
+                Utf8 charSequence766;
+                Object oldString766 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(766);
+                if (oldString766 instanceof Utf8) {
+                    charSequence766 = (decoder).readString(((Utf8) oldString766));
+                } else {
+                    charSequence766 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, charSequence766);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F766': "+ unionIndex766));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex767 = (decoder.readIndex());
+        if (unionIndex767 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, null);
+        } else {
+            if (unionIndex767 == 1) {
+                Utf8 charSequence767;
+                Object oldString767 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(767);
+                if (oldString767 instanceof Utf8) {
+                    charSequence767 = (decoder).readString(((Utf8) oldString767));
+                } else {
+                    charSequence767 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, charSequence767);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F767': "+ unionIndex767));
+            }
+        }
+        int unionIndex768 = (decoder.readIndex());
+        if (unionIndex768 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, null);
+        } else {
+            if (unionIndex768 == 1) {
+                Utf8 charSequence768;
+                Object oldString768 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(768);
+                if (oldString768 instanceof Utf8) {
+                    charSequence768 = (decoder).readString(((Utf8) oldString768));
+                } else {
+                    charSequence768 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, charSequence768);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F768': "+ unionIndex768));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex769 = (decoder.readIndex());
+        if (unionIndex769 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, null);
+        } else {
+            if (unionIndex769 == 1) {
+                Utf8 charSequence769;
+                Object oldString769 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(769);
+                if (oldString769 instanceof Utf8) {
+                    charSequence769 = (decoder).readString(((Utf8) oldString769));
+                } else {
+                    charSequence769 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, charSequence769);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F769': "+ unionIndex769));
+            }
+        }
+        int unionIndex770 = (decoder.readIndex());
+        if (unionIndex770 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, null);
+        } else {
+            if (unionIndex770 == 1) {
+                Utf8 charSequence770;
+                Object oldString770 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(770);
+                if (oldString770 instanceof Utf8) {
+                    charSequence770 = (decoder).readString(((Utf8) oldString770));
+                } else {
+                    charSequence770 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, charSequence770);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F770': "+ unionIndex770));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex771 = (decoder.readIndex());
+        if (unionIndex771 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, null);
+        } else {
+            if (unionIndex771 == 1) {
+                Utf8 charSequence771;
+                Object oldString771 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(771);
+                if (oldString771 instanceof Utf8) {
+                    charSequence771 = (decoder).readString(((Utf8) oldString771));
+                } else {
+                    charSequence771 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, charSequence771);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F771': "+ unionIndex771));
+            }
+        }
+        int unionIndex772 = (decoder.readIndex());
+        if (unionIndex772 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, null);
+        } else {
+            if (unionIndex772 == 1) {
+                Utf8 charSequence772;
+                Object oldString772 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(772);
+                if (oldString772 instanceof Utf8) {
+                    charSequence772 = (decoder).readString(((Utf8) oldString772));
+                } else {
+                    charSequence772 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, charSequence772);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F772': "+ unionIndex772));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex773 = (decoder.readIndex());
+        if (unionIndex773 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, null);
+        } else {
+            if (unionIndex773 == 1) {
+                Utf8 charSequence773;
+                Object oldString773 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(773);
+                if (oldString773 instanceof Utf8) {
+                    charSequence773 = (decoder).readString(((Utf8) oldString773));
+                } else {
+                    charSequence773 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, charSequence773);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F773': "+ unionIndex773));
+            }
+        }
+        int unionIndex774 = (decoder.readIndex());
+        if (unionIndex774 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, null);
+        } else {
+            if (unionIndex774 == 1) {
+                Utf8 charSequence774;
+                Object oldString774 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(774);
+                if (oldString774 instanceof Utf8) {
+                    charSequence774 = (decoder).readString(((Utf8) oldString774));
+                } else {
+                    charSequence774 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, charSequence774);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F774': "+ unionIndex774));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex775 = (decoder.readIndex());
+        if (unionIndex775 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, null);
+        } else {
+            if (unionIndex775 == 1) {
+                Utf8 charSequence775;
+                Object oldString775 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(775);
+                if (oldString775 instanceof Utf8) {
+                    charSequence775 = (decoder).readString(((Utf8) oldString775));
+                } else {
+                    charSequence775 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, charSequence775);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F775': "+ unionIndex775));
+            }
+        }
+        int unionIndex776 = (decoder.readIndex());
+        if (unionIndex776 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, null);
+        } else {
+            if (unionIndex776 == 1) {
+                Utf8 charSequence776;
+                Object oldString776 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(776);
+                if (oldString776 instanceof Utf8) {
+                    charSequence776 = (decoder).readString(((Utf8) oldString776));
+                } else {
+                    charSequence776 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, charSequence776);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F776': "+ unionIndex776));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex777 = (decoder.readIndex());
+        if (unionIndex777 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, null);
+        } else {
+            if (unionIndex777 == 1) {
+                Utf8 charSequence777;
+                Object oldString777 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(777);
+                if (oldString777 instanceof Utf8) {
+                    charSequence777 = (decoder).readString(((Utf8) oldString777));
+                } else {
+                    charSequence777 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, charSequence777);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F777': "+ unionIndex777));
+            }
+        }
+        int unionIndex778 = (decoder.readIndex());
+        if (unionIndex778 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, null);
+        } else {
+            if (unionIndex778 == 1) {
+                Utf8 charSequence778;
+                Object oldString778 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(778);
+                if (oldString778 instanceof Utf8) {
+                    charSequence778 = (decoder).readString(((Utf8) oldString778));
+                } else {
+                    charSequence778 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, charSequence778);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F778': "+ unionIndex778));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex779 = (decoder.readIndex());
+        if (unionIndex779 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, null);
+        } else {
+            if (unionIndex779 == 1) {
+                Utf8 charSequence779;
+                Object oldString779 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(779);
+                if (oldString779 instanceof Utf8) {
+                    charSequence779 = (decoder).readString(((Utf8) oldString779));
+                } else {
+                    charSequence779 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, charSequence779);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F779': "+ unionIndex779));
+            }
+        }
+        int unionIndex780 = (decoder.readIndex());
+        if (unionIndex780 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, null);
+        } else {
+            if (unionIndex780 == 1) {
+                Utf8 charSequence780;
+                Object oldString780 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(780);
+                if (oldString780 instanceof Utf8) {
+                    charSequence780 = (decoder).readString(((Utf8) oldString780));
+                } else {
+                    charSequence780 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, charSequence780);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F780': "+ unionIndex780));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex781 = (decoder.readIndex());
+        if (unionIndex781 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, null);
+        } else {
+            if (unionIndex781 == 1) {
+                Utf8 charSequence781;
+                Object oldString781 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(781);
+                if (oldString781 instanceof Utf8) {
+                    charSequence781 = (decoder).readString(((Utf8) oldString781));
+                } else {
+                    charSequence781 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, charSequence781);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F781': "+ unionIndex781));
+            }
+        }
+        int unionIndex782 = (decoder.readIndex());
+        if (unionIndex782 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, null);
+        } else {
+            if (unionIndex782 == 1) {
+                Utf8 charSequence782;
+                Object oldString782 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(782);
+                if (oldString782 instanceof Utf8) {
+                    charSequence782 = (decoder).readString(((Utf8) oldString782));
+                } else {
+                    charSequence782 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, charSequence782);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F782': "+ unionIndex782));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex783 = (decoder.readIndex());
+        if (unionIndex783 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, null);
+        } else {
+            if (unionIndex783 == 1) {
+                Utf8 charSequence783;
+                Object oldString783 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(783);
+                if (oldString783 instanceof Utf8) {
+                    charSequence783 = (decoder).readString(((Utf8) oldString783));
+                } else {
+                    charSequence783 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, charSequence783);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F783': "+ unionIndex783));
+            }
+        }
+        int unionIndex784 = (decoder.readIndex());
+        if (unionIndex784 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, null);
+        } else {
+            if (unionIndex784 == 1) {
+                Utf8 charSequence784;
+                Object oldString784 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(784);
+                if (oldString784 instanceof Utf8) {
+                    charSequence784 = (decoder).readString(((Utf8) oldString784));
+                } else {
+                    charSequence784 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, charSequence784);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F784': "+ unionIndex784));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex785 = (decoder.readIndex());
+        if (unionIndex785 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, null);
+        } else {
+            if (unionIndex785 == 1) {
+                Utf8 charSequence785;
+                Object oldString785 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(785);
+                if (oldString785 instanceof Utf8) {
+                    charSequence785 = (decoder).readString(((Utf8) oldString785));
+                } else {
+                    charSequence785 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, charSequence785);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F785': "+ unionIndex785));
+            }
+        }
+        int unionIndex786 = (decoder.readIndex());
+        if (unionIndex786 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, null);
+        } else {
+            if (unionIndex786 == 1) {
+                Utf8 charSequence786;
+                Object oldString786 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(786);
+                if (oldString786 instanceof Utf8) {
+                    charSequence786 = (decoder).readString(((Utf8) oldString786));
+                } else {
+                    charSequence786 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, charSequence786);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F786': "+ unionIndex786));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex787 = (decoder.readIndex());
+        if (unionIndex787 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, null);
+        } else {
+            if (unionIndex787 == 1) {
+                Utf8 charSequence787;
+                Object oldString787 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(787);
+                if (oldString787 instanceof Utf8) {
+                    charSequence787 = (decoder).readString(((Utf8) oldString787));
+                } else {
+                    charSequence787 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, charSequence787);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F787': "+ unionIndex787));
+            }
+        }
+        int unionIndex788 = (decoder.readIndex());
+        if (unionIndex788 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, null);
+        } else {
+            if (unionIndex788 == 1) {
+                Utf8 charSequence788;
+                Object oldString788 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(788);
+                if (oldString788 instanceof Utf8) {
+                    charSequence788 = (decoder).readString(((Utf8) oldString788));
+                } else {
+                    charSequence788 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, charSequence788);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F788': "+ unionIndex788));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex789 = (decoder.readIndex());
+        if (unionIndex789 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, null);
+        } else {
+            if (unionIndex789 == 1) {
+                Utf8 charSequence789;
+                Object oldString789 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(789);
+                if (oldString789 instanceof Utf8) {
+                    charSequence789 = (decoder).readString(((Utf8) oldString789));
+                } else {
+                    charSequence789 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, charSequence789);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F789': "+ unionIndex789));
+            }
+        }
+        int unionIndex790 = (decoder.readIndex());
+        if (unionIndex790 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, null);
+        } else {
+            if (unionIndex790 == 1) {
+                Utf8 charSequence790;
+                Object oldString790 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(790);
+                if (oldString790 instanceof Utf8) {
+                    charSequence790 = (decoder).readString(((Utf8) oldString790));
+                } else {
+                    charSequence790 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, charSequence790);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F790': "+ unionIndex790));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex791 = (decoder.readIndex());
+        if (unionIndex791 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, null);
+        } else {
+            if (unionIndex791 == 1) {
+                Utf8 charSequence791;
+                Object oldString791 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(791);
+                if (oldString791 instanceof Utf8) {
+                    charSequence791 = (decoder).readString(((Utf8) oldString791));
+                } else {
+                    charSequence791 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, charSequence791);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F791': "+ unionIndex791));
+            }
+        }
+        int unionIndex792 = (decoder.readIndex());
+        if (unionIndex792 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, null);
+        } else {
+            if (unionIndex792 == 1) {
+                Utf8 charSequence792;
+                Object oldString792 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(792);
+                if (oldString792 instanceof Utf8) {
+                    charSequence792 = (decoder).readString(((Utf8) oldString792));
+                } else {
+                    charSequence792 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, charSequence792);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F792': "+ unionIndex792));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex793 = (decoder.readIndex());
+        if (unionIndex793 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, null);
+        } else {
+            if (unionIndex793 == 1) {
+                Utf8 charSequence793;
+                Object oldString793 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(793);
+                if (oldString793 instanceof Utf8) {
+                    charSequence793 = (decoder).readString(((Utf8) oldString793));
+                } else {
+                    charSequence793 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, charSequence793);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F793': "+ unionIndex793));
+            }
+        }
+        int unionIndex794 = (decoder.readIndex());
+        if (unionIndex794 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, null);
+        } else {
+            if (unionIndex794 == 1) {
+                Utf8 charSequence794;
+                Object oldString794 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(794);
+                if (oldString794 instanceof Utf8) {
+                    charSequence794 = (decoder).readString(((Utf8) oldString794));
+                } else {
+                    charSequence794 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, charSequence794);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F794': "+ unionIndex794));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex795 = (decoder.readIndex());
+        if (unionIndex795 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, null);
+        } else {
+            if (unionIndex795 == 1) {
+                Utf8 charSequence795;
+                Object oldString795 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(795);
+                if (oldString795 instanceof Utf8) {
+                    charSequence795 = (decoder).readString(((Utf8) oldString795));
+                } else {
+                    charSequence795 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, charSequence795);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F795': "+ unionIndex795));
+            }
+        }
+        int unionIndex796 = (decoder.readIndex());
+        if (unionIndex796 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, null);
+        } else {
+            if (unionIndex796 == 1) {
+                Utf8 charSequence796;
+                Object oldString796 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(796);
+                if (oldString796 instanceof Utf8) {
+                    charSequence796 = (decoder).readString(((Utf8) oldString796));
+                } else {
+                    charSequence796 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, charSequence796);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F796': "+ unionIndex796));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex797 = (decoder.readIndex());
+        if (unionIndex797 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, null);
+        } else {
+            if (unionIndex797 == 1) {
+                Utf8 charSequence797;
+                Object oldString797 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(797);
+                if (oldString797 instanceof Utf8) {
+                    charSequence797 = (decoder).readString(((Utf8) oldString797));
+                } else {
+                    charSequence797 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, charSequence797);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F797': "+ unionIndex797));
+            }
+        }
+        int unionIndex798 = (decoder.readIndex());
+        if (unionIndex798 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, null);
+        } else {
+            if (unionIndex798 == 1) {
+                Utf8 charSequence798;
+                Object oldString798 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(798);
+                if (oldString798 instanceof Utf8) {
+                    charSequence798 = (decoder).readString(((Utf8) oldString798));
+                } else {
+                    charSequence798 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, charSequence798);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F798': "+ unionIndex798));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex799 = (decoder.readIndex());
+        if (unionIndex799 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, null);
+        } else {
+            if (unionIndex799 == 1) {
+                Utf8 charSequence799;
+                Object oldString799 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(799);
+                if (oldString799 instanceof Utf8) {
+                    charSequence799 = (decoder).readString(((Utf8) oldString799));
+                } else {
+                    charSequence799 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, charSequence799);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F799': "+ unionIndex799));
+            }
+        }
+        int unionIndex800 = (decoder.readIndex());
+        if (unionIndex800 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, null);
+        } else {
+            if (unionIndex800 == 1) {
+                Utf8 charSequence800;
+                Object oldString800 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(800);
+                if (oldString800 instanceof Utf8) {
+                    charSequence800 = (decoder).readString(((Utf8) oldString800));
+                } else {
+                    charSequence800 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, charSequence800);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F800': "+ unionIndex800));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex801 = (decoder.readIndex());
+        if (unionIndex801 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, null);
+        } else {
+            if (unionIndex801 == 1) {
+                Utf8 charSequence801;
+                Object oldString801 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(801);
+                if (oldString801 instanceof Utf8) {
+                    charSequence801 = (decoder).readString(((Utf8) oldString801));
+                } else {
+                    charSequence801 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, charSequence801);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F801': "+ unionIndex801));
+            }
+        }
+        int unionIndex802 = (decoder.readIndex());
+        if (unionIndex802 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, null);
+        } else {
+            if (unionIndex802 == 1) {
+                Utf8 charSequence802;
+                Object oldString802 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(802);
+                if (oldString802 instanceof Utf8) {
+                    charSequence802 = (decoder).readString(((Utf8) oldString802));
+                } else {
+                    charSequence802 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, charSequence802);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F802': "+ unionIndex802));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex803 = (decoder.readIndex());
+        if (unionIndex803 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, null);
+        } else {
+            if (unionIndex803 == 1) {
+                Utf8 charSequence803;
+                Object oldString803 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(803);
+                if (oldString803 instanceof Utf8) {
+                    charSequence803 = (decoder).readString(((Utf8) oldString803));
+                } else {
+                    charSequence803 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, charSequence803);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F803': "+ unionIndex803));
+            }
+        }
+        int unionIndex804 = (decoder.readIndex());
+        if (unionIndex804 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, null);
+        } else {
+            if (unionIndex804 == 1) {
+                Utf8 charSequence804;
+                Object oldString804 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(804);
+                if (oldString804 instanceof Utf8) {
+                    charSequence804 = (decoder).readString(((Utf8) oldString804));
+                } else {
+                    charSequence804 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, charSequence804);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F804': "+ unionIndex804));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex805 = (decoder.readIndex());
+        if (unionIndex805 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, null);
+        } else {
+            if (unionIndex805 == 1) {
+                Utf8 charSequence805;
+                Object oldString805 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(805);
+                if (oldString805 instanceof Utf8) {
+                    charSequence805 = (decoder).readString(((Utf8) oldString805));
+                } else {
+                    charSequence805 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, charSequence805);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F805': "+ unionIndex805));
+            }
+        }
+        int unionIndex806 = (decoder.readIndex());
+        if (unionIndex806 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, null);
+        } else {
+            if (unionIndex806 == 1) {
+                Utf8 charSequence806;
+                Object oldString806 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(806);
+                if (oldString806 instanceof Utf8) {
+                    charSequence806 = (decoder).readString(((Utf8) oldString806));
+                } else {
+                    charSequence806 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, charSequence806);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F806': "+ unionIndex806));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex807 = (decoder.readIndex());
+        if (unionIndex807 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, null);
+        } else {
+            if (unionIndex807 == 1) {
+                Utf8 charSequence807;
+                Object oldString807 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(807);
+                if (oldString807 instanceof Utf8) {
+                    charSequence807 = (decoder).readString(((Utf8) oldString807));
+                } else {
+                    charSequence807 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, charSequence807);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F807': "+ unionIndex807));
+            }
+        }
+        int unionIndex808 = (decoder.readIndex());
+        if (unionIndex808 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, null);
+        } else {
+            if (unionIndex808 == 1) {
+                Utf8 charSequence808;
+                Object oldString808 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(808);
+                if (oldString808 instanceof Utf8) {
+                    charSequence808 = (decoder).readString(((Utf8) oldString808));
+                } else {
+                    charSequence808 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, charSequence808);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F808': "+ unionIndex808));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex809 = (decoder.readIndex());
+        if (unionIndex809 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, null);
+        } else {
+            if (unionIndex809 == 1) {
+                Utf8 charSequence809;
+                Object oldString809 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(809);
+                if (oldString809 instanceof Utf8) {
+                    charSequence809 = (decoder).readString(((Utf8) oldString809));
+                } else {
+                    charSequence809 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, charSequence809);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F809': "+ unionIndex809));
+            }
+        }
+        int unionIndex810 = (decoder.readIndex());
+        if (unionIndex810 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, null);
+        } else {
+            if (unionIndex810 == 1) {
+                Utf8 charSequence810;
+                Object oldString810 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(810);
+                if (oldString810 instanceof Utf8) {
+                    charSequence810 = (decoder).readString(((Utf8) oldString810));
+                } else {
+                    charSequence810 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, charSequence810);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F810': "+ unionIndex810));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex811 = (decoder.readIndex());
+        if (unionIndex811 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, null);
+        } else {
+            if (unionIndex811 == 1) {
+                Utf8 charSequence811;
+                Object oldString811 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(811);
+                if (oldString811 instanceof Utf8) {
+                    charSequence811 = (decoder).readString(((Utf8) oldString811));
+                } else {
+                    charSequence811 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, charSequence811);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F811': "+ unionIndex811));
+            }
+        }
+        int unionIndex812 = (decoder.readIndex());
+        if (unionIndex812 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, null);
+        } else {
+            if (unionIndex812 == 1) {
+                Utf8 charSequence812;
+                Object oldString812 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(812);
+                if (oldString812 instanceof Utf8) {
+                    charSequence812 = (decoder).readString(((Utf8) oldString812));
+                } else {
+                    charSequence812 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, charSequence812);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F812': "+ unionIndex812));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex813 = (decoder.readIndex());
+        if (unionIndex813 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, null);
+        } else {
+            if (unionIndex813 == 1) {
+                Utf8 charSequence813;
+                Object oldString813 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(813);
+                if (oldString813 instanceof Utf8) {
+                    charSequence813 = (decoder).readString(((Utf8) oldString813));
+                } else {
+                    charSequence813 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, charSequence813);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F813': "+ unionIndex813));
+            }
+        }
+        int unionIndex814 = (decoder.readIndex());
+        if (unionIndex814 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, null);
+        } else {
+            if (unionIndex814 == 1) {
+                Utf8 charSequence814;
+                Object oldString814 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(814);
+                if (oldString814 instanceof Utf8) {
+                    charSequence814 = (decoder).readString(((Utf8) oldString814));
+                } else {
+                    charSequence814 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, charSequence814);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F814': "+ unionIndex814));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex815 = (decoder.readIndex());
+        if (unionIndex815 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, null);
+        } else {
+            if (unionIndex815 == 1) {
+                Utf8 charSequence815;
+                Object oldString815 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(815);
+                if (oldString815 instanceof Utf8) {
+                    charSequence815 = (decoder).readString(((Utf8) oldString815));
+                } else {
+                    charSequence815 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, charSequence815);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F815': "+ unionIndex815));
+            }
+        }
+        int unionIndex816 = (decoder.readIndex());
+        if (unionIndex816 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, null);
+        } else {
+            if (unionIndex816 == 1) {
+                Utf8 charSequence816;
+                Object oldString816 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(816);
+                if (oldString816 instanceof Utf8) {
+                    charSequence816 = (decoder).readString(((Utf8) oldString816));
+                } else {
+                    charSequence816 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, charSequence816);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F816': "+ unionIndex816));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex817 = (decoder.readIndex());
+        if (unionIndex817 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, null);
+        } else {
+            if (unionIndex817 == 1) {
+                Utf8 charSequence817;
+                Object oldString817 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(817);
+                if (oldString817 instanceof Utf8) {
+                    charSequence817 = (decoder).readString(((Utf8) oldString817));
+                } else {
+                    charSequence817 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, charSequence817);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F817': "+ unionIndex817));
+            }
+        }
+        int unionIndex818 = (decoder.readIndex());
+        if (unionIndex818 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, null);
+        } else {
+            if (unionIndex818 == 1) {
+                Utf8 charSequence818;
+                Object oldString818 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(818);
+                if (oldString818 instanceof Utf8) {
+                    charSequence818 = (decoder).readString(((Utf8) oldString818));
+                } else {
+                    charSequence818 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, charSequence818);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F818': "+ unionIndex818));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex819 = (decoder.readIndex());
+        if (unionIndex819 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, null);
+        } else {
+            if (unionIndex819 == 1) {
+                Utf8 charSequence819;
+                Object oldString819 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(819);
+                if (oldString819 instanceof Utf8) {
+                    charSequence819 = (decoder).readString(((Utf8) oldString819));
+                } else {
+                    charSequence819 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, charSequence819);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F819': "+ unionIndex819));
+            }
+        }
+        int unionIndex820 = (decoder.readIndex());
+        if (unionIndex820 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, null);
+        } else {
+            if (unionIndex820 == 1) {
+                Utf8 charSequence820;
+                Object oldString820 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(820);
+                if (oldString820 instanceof Utf8) {
+                    charSequence820 = (decoder).readString(((Utf8) oldString820));
+                } else {
+                    charSequence820 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, charSequence820);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F820': "+ unionIndex820));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex821 = (decoder.readIndex());
+        if (unionIndex821 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, null);
+        } else {
+            if (unionIndex821 == 1) {
+                Utf8 charSequence821;
+                Object oldString821 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(821);
+                if (oldString821 instanceof Utf8) {
+                    charSequence821 = (decoder).readString(((Utf8) oldString821));
+                } else {
+                    charSequence821 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, charSequence821);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F821': "+ unionIndex821));
+            }
+        }
+        int unionIndex822 = (decoder.readIndex());
+        if (unionIndex822 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, null);
+        } else {
+            if (unionIndex822 == 1) {
+                Utf8 charSequence822;
+                Object oldString822 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(822);
+                if (oldString822 instanceof Utf8) {
+                    charSequence822 = (decoder).readString(((Utf8) oldString822));
+                } else {
+                    charSequence822 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, charSequence822);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F822': "+ unionIndex822));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex823 = (decoder.readIndex());
+        if (unionIndex823 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, null);
+        } else {
+            if (unionIndex823 == 1) {
+                Utf8 charSequence823;
+                Object oldString823 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(823);
+                if (oldString823 instanceof Utf8) {
+                    charSequence823 = (decoder).readString(((Utf8) oldString823));
+                } else {
+                    charSequence823 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, charSequence823);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F823': "+ unionIndex823));
+            }
+        }
+        int unionIndex824 = (decoder.readIndex());
+        if (unionIndex824 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, null);
+        } else {
+            if (unionIndex824 == 1) {
+                Utf8 charSequence824;
+                Object oldString824 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(824);
+                if (oldString824 instanceof Utf8) {
+                    charSequence824 = (decoder).readString(((Utf8) oldString824));
+                } else {
+                    charSequence824 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, charSequence824);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F824': "+ unionIndex824));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex825 = (decoder.readIndex());
+        if (unionIndex825 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, null);
+        } else {
+            if (unionIndex825 == 1) {
+                Utf8 charSequence825;
+                Object oldString825 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(825);
+                if (oldString825 instanceof Utf8) {
+                    charSequence825 = (decoder).readString(((Utf8) oldString825));
+                } else {
+                    charSequence825 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, charSequence825);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F825': "+ unionIndex825));
+            }
+        }
+        int unionIndex826 = (decoder.readIndex());
+        if (unionIndex826 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, null);
+        } else {
+            if (unionIndex826 == 1) {
+                Utf8 charSequence826;
+                Object oldString826 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(826);
+                if (oldString826 instanceof Utf8) {
+                    charSequence826 = (decoder).readString(((Utf8) oldString826));
+                } else {
+                    charSequence826 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, charSequence826);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F826': "+ unionIndex826));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex827 = (decoder.readIndex());
+        if (unionIndex827 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, null);
+        } else {
+            if (unionIndex827 == 1) {
+                Utf8 charSequence827;
+                Object oldString827 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(827);
+                if (oldString827 instanceof Utf8) {
+                    charSequence827 = (decoder).readString(((Utf8) oldString827));
+                } else {
+                    charSequence827 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, charSequence827);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F827': "+ unionIndex827));
+            }
+        }
+        int unionIndex828 = (decoder.readIndex());
+        if (unionIndex828 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, null);
+        } else {
+            if (unionIndex828 == 1) {
+                Utf8 charSequence828;
+                Object oldString828 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(828);
+                if (oldString828 instanceof Utf8) {
+                    charSequence828 = (decoder).readString(((Utf8) oldString828));
+                } else {
+                    charSequence828 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, charSequence828);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F828': "+ unionIndex828));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex829 = (decoder.readIndex());
+        if (unionIndex829 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, null);
+        } else {
+            if (unionIndex829 == 1) {
+                Utf8 charSequence829;
+                Object oldString829 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(829);
+                if (oldString829 instanceof Utf8) {
+                    charSequence829 = (decoder).readString(((Utf8) oldString829));
+                } else {
+                    charSequence829 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, charSequence829);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F829': "+ unionIndex829));
+            }
+        }
+        int unionIndex830 = (decoder.readIndex());
+        if (unionIndex830 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, null);
+        } else {
+            if (unionIndex830 == 1) {
+                Utf8 charSequence830;
+                Object oldString830 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(830);
+                if (oldString830 instanceof Utf8) {
+                    charSequence830 = (decoder).readString(((Utf8) oldString830));
+                } else {
+                    charSequence830 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, charSequence830);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F830': "+ unionIndex830));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex831 = (decoder.readIndex());
+        if (unionIndex831 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, null);
+        } else {
+            if (unionIndex831 == 1) {
+                Utf8 charSequence831;
+                Object oldString831 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(831);
+                if (oldString831 instanceof Utf8) {
+                    charSequence831 = (decoder).readString(((Utf8) oldString831));
+                } else {
+                    charSequence831 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, charSequence831);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F831': "+ unionIndex831));
+            }
+        }
+        int unionIndex832 = (decoder.readIndex());
+        if (unionIndex832 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, null);
+        } else {
+            if (unionIndex832 == 1) {
+                Utf8 charSequence832;
+                Object oldString832 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(832);
+                if (oldString832 instanceof Utf8) {
+                    charSequence832 = (decoder).readString(((Utf8) oldString832));
+                } else {
+                    charSequence832 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, charSequence832);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F832': "+ unionIndex832));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex833 = (decoder.readIndex());
+        if (unionIndex833 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, null);
+        } else {
+            if (unionIndex833 == 1) {
+                Utf8 charSequence833;
+                Object oldString833 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(833);
+                if (oldString833 instanceof Utf8) {
+                    charSequence833 = (decoder).readString(((Utf8) oldString833));
+                } else {
+                    charSequence833 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, charSequence833);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F833': "+ unionIndex833));
+            }
+        }
+        int unionIndex834 = (decoder.readIndex());
+        if (unionIndex834 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, null);
+        } else {
+            if (unionIndex834 == 1) {
+                Utf8 charSequence834;
+                Object oldString834 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(834);
+                if (oldString834 instanceof Utf8) {
+                    charSequence834 = (decoder).readString(((Utf8) oldString834));
+                } else {
+                    charSequence834 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, charSequence834);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F834': "+ unionIndex834));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex835 = (decoder.readIndex());
+        if (unionIndex835 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, null);
+        } else {
+            if (unionIndex835 == 1) {
+                Utf8 charSequence835;
+                Object oldString835 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(835);
+                if (oldString835 instanceof Utf8) {
+                    charSequence835 = (decoder).readString(((Utf8) oldString835));
+                } else {
+                    charSequence835 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, charSequence835);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F835': "+ unionIndex835));
+            }
+        }
+        int unionIndex836 = (decoder.readIndex());
+        if (unionIndex836 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, null);
+        } else {
+            if (unionIndex836 == 1) {
+                Utf8 charSequence836;
+                Object oldString836 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(836);
+                if (oldString836 instanceof Utf8) {
+                    charSequence836 = (decoder).readString(((Utf8) oldString836));
+                } else {
+                    charSequence836 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, charSequence836);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F836': "+ unionIndex836));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex837 = (decoder.readIndex());
+        if (unionIndex837 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, null);
+        } else {
+            if (unionIndex837 == 1) {
+                Utf8 charSequence837;
+                Object oldString837 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(837);
+                if (oldString837 instanceof Utf8) {
+                    charSequence837 = (decoder).readString(((Utf8) oldString837));
+                } else {
+                    charSequence837 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, charSequence837);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F837': "+ unionIndex837));
+            }
+        }
+        int unionIndex838 = (decoder.readIndex());
+        if (unionIndex838 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, null);
+        } else {
+            if (unionIndex838 == 1) {
+                Utf8 charSequence838;
+                Object oldString838 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(838);
+                if (oldString838 instanceof Utf8) {
+                    charSequence838 = (decoder).readString(((Utf8) oldString838));
+                } else {
+                    charSequence838 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, charSequence838);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F838': "+ unionIndex838));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex839 = (decoder.readIndex());
+        if (unionIndex839 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, null);
+        } else {
+            if (unionIndex839 == 1) {
+                Utf8 charSequence839;
+                Object oldString839 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(839);
+                if (oldString839 instanceof Utf8) {
+                    charSequence839 = (decoder).readString(((Utf8) oldString839));
+                } else {
+                    charSequence839 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, charSequence839);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F839': "+ unionIndex839));
+            }
+        }
+        int unionIndex840 = (decoder.readIndex());
+        if (unionIndex840 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, null);
+        } else {
+            if (unionIndex840 == 1) {
+                Utf8 charSequence840;
+                Object oldString840 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(840);
+                if (oldString840 instanceof Utf8) {
+                    charSequence840 = (decoder).readString(((Utf8) oldString840));
+                } else {
+                    charSequence840 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, charSequence840);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F840': "+ unionIndex840));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex841 = (decoder.readIndex());
+        if (unionIndex841 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, null);
+        } else {
+            if (unionIndex841 == 1) {
+                Utf8 charSequence841;
+                Object oldString841 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(841);
+                if (oldString841 instanceof Utf8) {
+                    charSequence841 = (decoder).readString(((Utf8) oldString841));
+                } else {
+                    charSequence841 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, charSequence841);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F841': "+ unionIndex841));
+            }
+        }
+        int unionIndex842 = (decoder.readIndex());
+        if (unionIndex842 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, null);
+        } else {
+            if (unionIndex842 == 1) {
+                Utf8 charSequence842;
+                Object oldString842 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(842);
+                if (oldString842 instanceof Utf8) {
+                    charSequence842 = (decoder).readString(((Utf8) oldString842));
+                } else {
+                    charSequence842 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, charSequence842);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F842': "+ unionIndex842));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex843 = (decoder.readIndex());
+        if (unionIndex843 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, null);
+        } else {
+            if (unionIndex843 == 1) {
+                Utf8 charSequence843;
+                Object oldString843 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(843);
+                if (oldString843 instanceof Utf8) {
+                    charSequence843 = (decoder).readString(((Utf8) oldString843));
+                } else {
+                    charSequence843 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, charSequence843);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F843': "+ unionIndex843));
+            }
+        }
+        int unionIndex844 = (decoder.readIndex());
+        if (unionIndex844 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, null);
+        } else {
+            if (unionIndex844 == 1) {
+                Utf8 charSequence844;
+                Object oldString844 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(844);
+                if (oldString844 instanceof Utf8) {
+                    charSequence844 = (decoder).readString(((Utf8) oldString844));
+                } else {
+                    charSequence844 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, charSequence844);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F844': "+ unionIndex844));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex845 = (decoder.readIndex());
+        if (unionIndex845 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, null);
+        } else {
+            if (unionIndex845 == 1) {
+                Utf8 charSequence845;
+                Object oldString845 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(845);
+                if (oldString845 instanceof Utf8) {
+                    charSequence845 = (decoder).readString(((Utf8) oldString845));
+                } else {
+                    charSequence845 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, charSequence845);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F845': "+ unionIndex845));
+            }
+        }
+        int unionIndex846 = (decoder.readIndex());
+        if (unionIndex846 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, null);
+        } else {
+            if (unionIndex846 == 1) {
+                Utf8 charSequence846;
+                Object oldString846 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(846);
+                if (oldString846 instanceof Utf8) {
+                    charSequence846 = (decoder).readString(((Utf8) oldString846));
+                } else {
+                    charSequence846 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, charSequence846);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F846': "+ unionIndex846));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex847 = (decoder.readIndex());
+        if (unionIndex847 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, null);
+        } else {
+            if (unionIndex847 == 1) {
+                Utf8 charSequence847;
+                Object oldString847 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(847);
+                if (oldString847 instanceof Utf8) {
+                    charSequence847 = (decoder).readString(((Utf8) oldString847));
+                } else {
+                    charSequence847 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, charSequence847);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F847': "+ unionIndex847));
+            }
+        }
+        int unionIndex848 = (decoder.readIndex());
+        if (unionIndex848 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, null);
+        } else {
+            if (unionIndex848 == 1) {
+                Utf8 charSequence848;
+                Object oldString848 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(848);
+                if (oldString848 instanceof Utf8) {
+                    charSequence848 = (decoder).readString(((Utf8) oldString848));
+                } else {
+                    charSequence848 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, charSequence848);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F848': "+ unionIndex848));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex849 = (decoder.readIndex());
+        if (unionIndex849 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, null);
+        } else {
+            if (unionIndex849 == 1) {
+                Utf8 charSequence849;
+                Object oldString849 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(849);
+                if (oldString849 instanceof Utf8) {
+                    charSequence849 = (decoder).readString(((Utf8) oldString849));
+                } else {
+                    charSequence849 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, charSequence849);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F849': "+ unionIndex849));
+            }
+        }
+        int unionIndex850 = (decoder.readIndex());
+        if (unionIndex850 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, null);
+        } else {
+            if (unionIndex850 == 1) {
+                Utf8 charSequence850;
+                Object oldString850 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(850);
+                if (oldString850 instanceof Utf8) {
+                    charSequence850 = (decoder).readString(((Utf8) oldString850));
+                } else {
+                    charSequence850 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, charSequence850);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F850': "+ unionIndex850));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex851 = (decoder.readIndex());
+        if (unionIndex851 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, null);
+        } else {
+            if (unionIndex851 == 1) {
+                Utf8 charSequence851;
+                Object oldString851 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(851);
+                if (oldString851 instanceof Utf8) {
+                    charSequence851 = (decoder).readString(((Utf8) oldString851));
+                } else {
+                    charSequence851 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, charSequence851);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F851': "+ unionIndex851));
+            }
+        }
+        int unionIndex852 = (decoder.readIndex());
+        if (unionIndex852 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, null);
+        } else {
+            if (unionIndex852 == 1) {
+                Utf8 charSequence852;
+                Object oldString852 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(852);
+                if (oldString852 instanceof Utf8) {
+                    charSequence852 = (decoder).readString(((Utf8) oldString852));
+                } else {
+                    charSequence852 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, charSequence852);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F852': "+ unionIndex852));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex853 = (decoder.readIndex());
+        if (unionIndex853 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, null);
+        } else {
+            if (unionIndex853 == 1) {
+                Utf8 charSequence853;
+                Object oldString853 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(853);
+                if (oldString853 instanceof Utf8) {
+                    charSequence853 = (decoder).readString(((Utf8) oldString853));
+                } else {
+                    charSequence853 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, charSequence853);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F853': "+ unionIndex853));
+            }
+        }
+        int unionIndex854 = (decoder.readIndex());
+        if (unionIndex854 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, null);
+        } else {
+            if (unionIndex854 == 1) {
+                Utf8 charSequence854;
+                Object oldString854 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(854);
+                if (oldString854 instanceof Utf8) {
+                    charSequence854 = (decoder).readString(((Utf8) oldString854));
+                } else {
+                    charSequence854 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, charSequence854);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F854': "+ unionIndex854));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex855 = (decoder.readIndex());
+        if (unionIndex855 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, null);
+        } else {
+            if (unionIndex855 == 1) {
+                Utf8 charSequence855;
+                Object oldString855 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(855);
+                if (oldString855 instanceof Utf8) {
+                    charSequence855 = (decoder).readString(((Utf8) oldString855));
+                } else {
+                    charSequence855 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, charSequence855);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F855': "+ unionIndex855));
+            }
+        }
+        int unionIndex856 = (decoder.readIndex());
+        if (unionIndex856 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, null);
+        } else {
+            if (unionIndex856 == 1) {
+                Utf8 charSequence856;
+                Object oldString856 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(856);
+                if (oldString856 instanceof Utf8) {
+                    charSequence856 = (decoder).readString(((Utf8) oldString856));
+                } else {
+                    charSequence856 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, charSequence856);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F856': "+ unionIndex856));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex857 = (decoder.readIndex());
+        if (unionIndex857 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, null);
+        } else {
+            if (unionIndex857 == 1) {
+                Utf8 charSequence857;
+                Object oldString857 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(857);
+                if (oldString857 instanceof Utf8) {
+                    charSequence857 = (decoder).readString(((Utf8) oldString857));
+                } else {
+                    charSequence857 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, charSequence857);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F857': "+ unionIndex857));
+            }
+        }
+        int unionIndex858 = (decoder.readIndex());
+        if (unionIndex858 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, null);
+        } else {
+            if (unionIndex858 == 1) {
+                Utf8 charSequence858;
+                Object oldString858 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(858);
+                if (oldString858 instanceof Utf8) {
+                    charSequence858 = (decoder).readString(((Utf8) oldString858));
+                } else {
+                    charSequence858 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, charSequence858);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F858': "+ unionIndex858));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex859 = (decoder.readIndex());
+        if (unionIndex859 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, null);
+        } else {
+            if (unionIndex859 == 1) {
+                Utf8 charSequence859;
+                Object oldString859 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(859);
+                if (oldString859 instanceof Utf8) {
+                    charSequence859 = (decoder).readString(((Utf8) oldString859));
+                } else {
+                    charSequence859 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, charSequence859);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F859': "+ unionIndex859));
+            }
+        }
+        int unionIndex860 = (decoder.readIndex());
+        if (unionIndex860 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, null);
+        } else {
+            if (unionIndex860 == 1) {
+                Utf8 charSequence860;
+                Object oldString860 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(860);
+                if (oldString860 instanceof Utf8) {
+                    charSequence860 = (decoder).readString(((Utf8) oldString860));
+                } else {
+                    charSequence860 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, charSequence860);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F860': "+ unionIndex860));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex861 = (decoder.readIndex());
+        if (unionIndex861 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, null);
+        } else {
+            if (unionIndex861 == 1) {
+                Utf8 charSequence861;
+                Object oldString861 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(861);
+                if (oldString861 instanceof Utf8) {
+                    charSequence861 = (decoder).readString(((Utf8) oldString861));
+                } else {
+                    charSequence861 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, charSequence861);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F861': "+ unionIndex861));
+            }
+        }
+        int unionIndex862 = (decoder.readIndex());
+        if (unionIndex862 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, null);
+        } else {
+            if (unionIndex862 == 1) {
+                Utf8 charSequence862;
+                Object oldString862 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(862);
+                if (oldString862 instanceof Utf8) {
+                    charSequence862 = (decoder).readString(((Utf8) oldString862));
+                } else {
+                    charSequence862 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, charSequence862);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F862': "+ unionIndex862));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex863 = (decoder.readIndex());
+        if (unionIndex863 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, null);
+        } else {
+            if (unionIndex863 == 1) {
+                Utf8 charSequence863;
+                Object oldString863 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(863);
+                if (oldString863 instanceof Utf8) {
+                    charSequence863 = (decoder).readString(((Utf8) oldString863));
+                } else {
+                    charSequence863 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, charSequence863);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F863': "+ unionIndex863));
+            }
+        }
+        int unionIndex864 = (decoder.readIndex());
+        if (unionIndex864 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, null);
+        } else {
+            if (unionIndex864 == 1) {
+                Utf8 charSequence864;
+                Object oldString864 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(864);
+                if (oldString864 instanceof Utf8) {
+                    charSequence864 = (decoder).readString(((Utf8) oldString864));
+                } else {
+                    charSequence864 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, charSequence864);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F864': "+ unionIndex864));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex865 = (decoder.readIndex());
+        if (unionIndex865 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, null);
+        } else {
+            if (unionIndex865 == 1) {
+                Utf8 charSequence865;
+                Object oldString865 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(865);
+                if (oldString865 instanceof Utf8) {
+                    charSequence865 = (decoder).readString(((Utf8) oldString865));
+                } else {
+                    charSequence865 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, charSequence865);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F865': "+ unionIndex865));
+            }
+        }
+        int unionIndex866 = (decoder.readIndex());
+        if (unionIndex866 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, null);
+        } else {
+            if (unionIndex866 == 1) {
+                Utf8 charSequence866;
+                Object oldString866 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(866);
+                if (oldString866 instanceof Utf8) {
+                    charSequence866 = (decoder).readString(((Utf8) oldString866));
+                } else {
+                    charSequence866 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, charSequence866);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F866': "+ unionIndex866));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex867 = (decoder.readIndex());
+        if (unionIndex867 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, null);
+        } else {
+            if (unionIndex867 == 1) {
+                Utf8 charSequence867;
+                Object oldString867 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(867);
+                if (oldString867 instanceof Utf8) {
+                    charSequence867 = (decoder).readString(((Utf8) oldString867));
+                } else {
+                    charSequence867 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, charSequence867);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F867': "+ unionIndex867));
+            }
+        }
+        int unionIndex868 = (decoder.readIndex());
+        if (unionIndex868 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, null);
+        } else {
+            if (unionIndex868 == 1) {
+                Utf8 charSequence868;
+                Object oldString868 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(868);
+                if (oldString868 instanceof Utf8) {
+                    charSequence868 = (decoder).readString(((Utf8) oldString868));
+                } else {
+                    charSequence868 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, charSequence868);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F868': "+ unionIndex868));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex869 = (decoder.readIndex());
+        if (unionIndex869 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, null);
+        } else {
+            if (unionIndex869 == 1) {
+                Utf8 charSequence869;
+                Object oldString869 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(869);
+                if (oldString869 instanceof Utf8) {
+                    charSequence869 = (decoder).readString(((Utf8) oldString869));
+                } else {
+                    charSequence869 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, charSequence869);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F869': "+ unionIndex869));
+            }
+        }
+        int unionIndex870 = (decoder.readIndex());
+        if (unionIndex870 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, null);
+        } else {
+            if (unionIndex870 == 1) {
+                Utf8 charSequence870;
+                Object oldString870 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(870);
+                if (oldString870 instanceof Utf8) {
+                    charSequence870 = (decoder).readString(((Utf8) oldString870));
+                } else {
+                    charSequence870 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, charSequence870);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F870': "+ unionIndex870));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex871 = (decoder.readIndex());
+        if (unionIndex871 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, null);
+        } else {
+            if (unionIndex871 == 1) {
+                Utf8 charSequence871;
+                Object oldString871 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(871);
+                if (oldString871 instanceof Utf8) {
+                    charSequence871 = (decoder).readString(((Utf8) oldString871));
+                } else {
+                    charSequence871 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, charSequence871);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F871': "+ unionIndex871));
+            }
+        }
+        int unionIndex872 = (decoder.readIndex());
+        if (unionIndex872 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, null);
+        } else {
+            if (unionIndex872 == 1) {
+                Utf8 charSequence872;
+                Object oldString872 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(872);
+                if (oldString872 instanceof Utf8) {
+                    charSequence872 = (decoder).readString(((Utf8) oldString872));
+                } else {
+                    charSequence872 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, charSequence872);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F872': "+ unionIndex872));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex873 = (decoder.readIndex());
+        if (unionIndex873 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, null);
+        } else {
+            if (unionIndex873 == 1) {
+                Utf8 charSequence873;
+                Object oldString873 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(873);
+                if (oldString873 instanceof Utf8) {
+                    charSequence873 = (decoder).readString(((Utf8) oldString873));
+                } else {
+                    charSequence873 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, charSequence873);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F873': "+ unionIndex873));
+            }
+        }
+        int unionIndex874 = (decoder.readIndex());
+        if (unionIndex874 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, null);
+        } else {
+            if (unionIndex874 == 1) {
+                Utf8 charSequence874;
+                Object oldString874 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(874);
+                if (oldString874 instanceof Utf8) {
+                    charSequence874 = (decoder).readString(((Utf8) oldString874));
+                } else {
+                    charSequence874 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, charSequence874);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F874': "+ unionIndex874));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex875 = (decoder.readIndex());
+        if (unionIndex875 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, null);
+        } else {
+            if (unionIndex875 == 1) {
+                Utf8 charSequence875;
+                Object oldString875 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(875);
+                if (oldString875 instanceof Utf8) {
+                    charSequence875 = (decoder).readString(((Utf8) oldString875));
+                } else {
+                    charSequence875 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, charSequence875);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F875': "+ unionIndex875));
+            }
+        }
+        int unionIndex876 = (decoder.readIndex());
+        if (unionIndex876 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, null);
+        } else {
+            if (unionIndex876 == 1) {
+                Utf8 charSequence876;
+                Object oldString876 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(876);
+                if (oldString876 instanceof Utf8) {
+                    charSequence876 = (decoder).readString(((Utf8) oldString876));
+                } else {
+                    charSequence876 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, charSequence876);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F876': "+ unionIndex876));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex877 = (decoder.readIndex());
+        if (unionIndex877 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, null);
+        } else {
+            if (unionIndex877 == 1) {
+                Utf8 charSequence877;
+                Object oldString877 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(877);
+                if (oldString877 instanceof Utf8) {
+                    charSequence877 = (decoder).readString(((Utf8) oldString877));
+                } else {
+                    charSequence877 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, charSequence877);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F877': "+ unionIndex877));
+            }
+        }
+        int unionIndex878 = (decoder.readIndex());
+        if (unionIndex878 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, null);
+        } else {
+            if (unionIndex878 == 1) {
+                Utf8 charSequence878;
+                Object oldString878 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(878);
+                if (oldString878 instanceof Utf8) {
+                    charSequence878 = (decoder).readString(((Utf8) oldString878));
+                } else {
+                    charSequence878 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, charSequence878);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F878': "+ unionIndex878));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex879 = (decoder.readIndex());
+        if (unionIndex879 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, null);
+        } else {
+            if (unionIndex879 == 1) {
+                Utf8 charSequence879;
+                Object oldString879 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(879);
+                if (oldString879 instanceof Utf8) {
+                    charSequence879 = (decoder).readString(((Utf8) oldString879));
+                } else {
+                    charSequence879 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, charSequence879);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F879': "+ unionIndex879));
+            }
+        }
+        int unionIndex880 = (decoder.readIndex());
+        if (unionIndex880 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, null);
+        } else {
+            if (unionIndex880 == 1) {
+                Utf8 charSequence880;
+                Object oldString880 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(880);
+                if (oldString880 instanceof Utf8) {
+                    charSequence880 = (decoder).readString(((Utf8) oldString880));
+                } else {
+                    charSequence880 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, charSequence880);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F880': "+ unionIndex880));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex881 = (decoder.readIndex());
+        if (unionIndex881 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, null);
+        } else {
+            if (unionIndex881 == 1) {
+                Utf8 charSequence881;
+                Object oldString881 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(881);
+                if (oldString881 instanceof Utf8) {
+                    charSequence881 = (decoder).readString(((Utf8) oldString881));
+                } else {
+                    charSequence881 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, charSequence881);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F881': "+ unionIndex881));
+            }
+        }
+        int unionIndex882 = (decoder.readIndex());
+        if (unionIndex882 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, null);
+        } else {
+            if (unionIndex882 == 1) {
+                Utf8 charSequence882;
+                Object oldString882 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(882);
+                if (oldString882 instanceof Utf8) {
+                    charSequence882 = (decoder).readString(((Utf8) oldString882));
+                } else {
+                    charSequence882 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, charSequence882);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F882': "+ unionIndex882));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex883 = (decoder.readIndex());
+        if (unionIndex883 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, null);
+        } else {
+            if (unionIndex883 == 1) {
+                Utf8 charSequence883;
+                Object oldString883 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(883);
+                if (oldString883 instanceof Utf8) {
+                    charSequence883 = (decoder).readString(((Utf8) oldString883));
+                } else {
+                    charSequence883 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, charSequence883);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F883': "+ unionIndex883));
+            }
+        }
+        int unionIndex884 = (decoder.readIndex());
+        if (unionIndex884 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, null);
+        } else {
+            if (unionIndex884 == 1) {
+                Utf8 charSequence884;
+                Object oldString884 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(884);
+                if (oldString884 instanceof Utf8) {
+                    charSequence884 = (decoder).readString(((Utf8) oldString884));
+                } else {
+                    charSequence884 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, charSequence884);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F884': "+ unionIndex884));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex885 = (decoder.readIndex());
+        if (unionIndex885 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, null);
+        } else {
+            if (unionIndex885 == 1) {
+                Utf8 charSequence885;
+                Object oldString885 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(885);
+                if (oldString885 instanceof Utf8) {
+                    charSequence885 = (decoder).readString(((Utf8) oldString885));
+                } else {
+                    charSequence885 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, charSequence885);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F885': "+ unionIndex885));
+            }
+        }
+        int unionIndex886 = (decoder.readIndex());
+        if (unionIndex886 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, null);
+        } else {
+            if (unionIndex886 == 1) {
+                Utf8 charSequence886;
+                Object oldString886 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(886);
+                if (oldString886 instanceof Utf8) {
+                    charSequence886 = (decoder).readString(((Utf8) oldString886));
+                } else {
+                    charSequence886 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, charSequence886);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F886': "+ unionIndex886));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex887 = (decoder.readIndex());
+        if (unionIndex887 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, null);
+        } else {
+            if (unionIndex887 == 1) {
+                Utf8 charSequence887;
+                Object oldString887 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(887);
+                if (oldString887 instanceof Utf8) {
+                    charSequence887 = (decoder).readString(((Utf8) oldString887));
+                } else {
+                    charSequence887 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, charSequence887);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F887': "+ unionIndex887));
+            }
+        }
+        int unionIndex888 = (decoder.readIndex());
+        if (unionIndex888 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, null);
+        } else {
+            if (unionIndex888 == 1) {
+                Utf8 charSequence888;
+                Object oldString888 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(888);
+                if (oldString888 instanceof Utf8) {
+                    charSequence888 = (decoder).readString(((Utf8) oldString888));
+                } else {
+                    charSequence888 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, charSequence888);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F888': "+ unionIndex888));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex889 = (decoder.readIndex());
+        if (unionIndex889 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, null);
+        } else {
+            if (unionIndex889 == 1) {
+                Utf8 charSequence889;
+                Object oldString889 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(889);
+                if (oldString889 instanceof Utf8) {
+                    charSequence889 = (decoder).readString(((Utf8) oldString889));
+                } else {
+                    charSequence889 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, charSequence889);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F889': "+ unionIndex889));
+            }
+        }
+        int unionIndex890 = (decoder.readIndex());
+        if (unionIndex890 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, null);
+        } else {
+            if (unionIndex890 == 1) {
+                Utf8 charSequence890;
+                Object oldString890 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(890);
+                if (oldString890 instanceof Utf8) {
+                    charSequence890 = (decoder).readString(((Utf8) oldString890));
+                } else {
+                    charSequence890 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, charSequence890);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F890': "+ unionIndex890));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex891 = (decoder.readIndex());
+        if (unionIndex891 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, null);
+        } else {
+            if (unionIndex891 == 1) {
+                Utf8 charSequence891;
+                Object oldString891 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(891);
+                if (oldString891 instanceof Utf8) {
+                    charSequence891 = (decoder).readString(((Utf8) oldString891));
+                } else {
+                    charSequence891 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, charSequence891);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F891': "+ unionIndex891));
+            }
+        }
+        int unionIndex892 = (decoder.readIndex());
+        if (unionIndex892 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, null);
+        } else {
+            if (unionIndex892 == 1) {
+                Utf8 charSequence892;
+                Object oldString892 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(892);
+                if (oldString892 instanceof Utf8) {
+                    charSequence892 = (decoder).readString(((Utf8) oldString892));
+                } else {
+                    charSequence892 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, charSequence892);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F892': "+ unionIndex892));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex893 = (decoder.readIndex());
+        if (unionIndex893 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, null);
+        } else {
+            if (unionIndex893 == 1) {
+                Utf8 charSequence893;
+                Object oldString893 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(893);
+                if (oldString893 instanceof Utf8) {
+                    charSequence893 = (decoder).readString(((Utf8) oldString893));
+                } else {
+                    charSequence893 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, charSequence893);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F893': "+ unionIndex893));
+            }
+        }
+        int unionIndex894 = (decoder.readIndex());
+        if (unionIndex894 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, null);
+        } else {
+            if (unionIndex894 == 1) {
+                Utf8 charSequence894;
+                Object oldString894 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(894);
+                if (oldString894 instanceof Utf8) {
+                    charSequence894 = (decoder).readString(((Utf8) oldString894));
+                } else {
+                    charSequence894 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, charSequence894);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F894': "+ unionIndex894));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex895 = (decoder.readIndex());
+        if (unionIndex895 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, null);
+        } else {
+            if (unionIndex895 == 1) {
+                Utf8 charSequence895;
+                Object oldString895 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(895);
+                if (oldString895 instanceof Utf8) {
+                    charSequence895 = (decoder).readString(((Utf8) oldString895));
+                } else {
+                    charSequence895 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, charSequence895);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F895': "+ unionIndex895));
+            }
+        }
+        int unionIndex896 = (decoder.readIndex());
+        if (unionIndex896 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, null);
+        } else {
+            if (unionIndex896 == 1) {
+                Utf8 charSequence896;
+                Object oldString896 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(896);
+                if (oldString896 instanceof Utf8) {
+                    charSequence896 = (decoder).readString(((Utf8) oldString896));
+                } else {
+                    charSequence896 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, charSequence896);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F896': "+ unionIndex896));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex897 = (decoder.readIndex());
+        if (unionIndex897 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, null);
+        } else {
+            if (unionIndex897 == 1) {
+                Utf8 charSequence897;
+                Object oldString897 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(897);
+                if (oldString897 instanceof Utf8) {
+                    charSequence897 = (decoder).readString(((Utf8) oldString897));
+                } else {
+                    charSequence897 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, charSequence897);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F897': "+ unionIndex897));
+            }
+        }
+        int unionIndex898 = (decoder.readIndex());
+        if (unionIndex898 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, null);
+        } else {
+            if (unionIndex898 == 1) {
+                Utf8 charSequence898;
+                Object oldString898 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(898);
+                if (oldString898 instanceof Utf8) {
+                    charSequence898 = (decoder).readString(((Utf8) oldString898));
+                } else {
+                    charSequence898 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, charSequence898);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F898': "+ unionIndex898));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex899 = (decoder.readIndex());
+        if (unionIndex899 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, null);
+        } else {
+            if (unionIndex899 == 1) {
+                Utf8 charSequence899;
+                Object oldString899 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(899);
+                if (oldString899 instanceof Utf8) {
+                    charSequence899 = (decoder).readString(((Utf8) oldString899));
+                } else {
+                    charSequence899 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, charSequence899);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F899': "+ unionIndex899));
+            }
+        }
+        int unionIndex900 = (decoder.readIndex());
+        if (unionIndex900 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, null);
+        } else {
+            if (unionIndex900 == 1) {
+                Utf8 charSequence900;
+                Object oldString900 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(900);
+                if (oldString900 instanceof Utf8) {
+                    charSequence900 = (decoder).readString(((Utf8) oldString900));
+                } else {
+                    charSequence900 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, charSequence900);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F900': "+ unionIndex900));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex901 = (decoder.readIndex());
+        if (unionIndex901 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, null);
+        } else {
+            if (unionIndex901 == 1) {
+                Utf8 charSequence901;
+                Object oldString901 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(901);
+                if (oldString901 instanceof Utf8) {
+                    charSequence901 = (decoder).readString(((Utf8) oldString901));
+                } else {
+                    charSequence901 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, charSequence901);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F901': "+ unionIndex901));
+            }
+        }
+        int unionIndex902 = (decoder.readIndex());
+        if (unionIndex902 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, null);
+        } else {
+            if (unionIndex902 == 1) {
+                Utf8 charSequence902;
+                Object oldString902 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(902);
+                if (oldString902 instanceof Utf8) {
+                    charSequence902 = (decoder).readString(((Utf8) oldString902));
+                } else {
+                    charSequence902 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, charSequence902);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F902': "+ unionIndex902));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex903 = (decoder.readIndex());
+        if (unionIndex903 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, null);
+        } else {
+            if (unionIndex903 == 1) {
+                Utf8 charSequence903;
+                Object oldString903 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(903);
+                if (oldString903 instanceof Utf8) {
+                    charSequence903 = (decoder).readString(((Utf8) oldString903));
+                } else {
+                    charSequence903 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, charSequence903);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F903': "+ unionIndex903));
+            }
+        }
+        int unionIndex904 = (decoder.readIndex());
+        if (unionIndex904 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, null);
+        } else {
+            if (unionIndex904 == 1) {
+                Utf8 charSequence904;
+                Object oldString904 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(904);
+                if (oldString904 instanceof Utf8) {
+                    charSequence904 = (decoder).readString(((Utf8) oldString904));
+                } else {
+                    charSequence904 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, charSequence904);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F904': "+ unionIndex904));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex905 = (decoder.readIndex());
+        if (unionIndex905 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, null);
+        } else {
+            if (unionIndex905 == 1) {
+                Utf8 charSequence905;
+                Object oldString905 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(905);
+                if (oldString905 instanceof Utf8) {
+                    charSequence905 = (decoder).readString(((Utf8) oldString905));
+                } else {
+                    charSequence905 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, charSequence905);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F905': "+ unionIndex905));
+            }
+        }
+        int unionIndex906 = (decoder.readIndex());
+        if (unionIndex906 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, null);
+        } else {
+            if (unionIndex906 == 1) {
+                Utf8 charSequence906;
+                Object oldString906 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(906);
+                if (oldString906 instanceof Utf8) {
+                    charSequence906 = (decoder).readString(((Utf8) oldString906));
+                } else {
+                    charSequence906 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, charSequence906);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F906': "+ unionIndex906));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex907 = (decoder.readIndex());
+        if (unionIndex907 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, null);
+        } else {
+            if (unionIndex907 == 1) {
+                Utf8 charSequence907;
+                Object oldString907 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(907);
+                if (oldString907 instanceof Utf8) {
+                    charSequence907 = (decoder).readString(((Utf8) oldString907));
+                } else {
+                    charSequence907 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, charSequence907);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F907': "+ unionIndex907));
+            }
+        }
+        int unionIndex908 = (decoder.readIndex());
+        if (unionIndex908 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, null);
+        } else {
+            if (unionIndex908 == 1) {
+                Utf8 charSequence908;
+                Object oldString908 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(908);
+                if (oldString908 instanceof Utf8) {
+                    charSequence908 = (decoder).readString(((Utf8) oldString908));
+                } else {
+                    charSequence908 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, charSequence908);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F908': "+ unionIndex908));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex909 = (decoder.readIndex());
+        if (unionIndex909 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, null);
+        } else {
+            if (unionIndex909 == 1) {
+                Utf8 charSequence909;
+                Object oldString909 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(909);
+                if (oldString909 instanceof Utf8) {
+                    charSequence909 = (decoder).readString(((Utf8) oldString909));
+                } else {
+                    charSequence909 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, charSequence909);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F909': "+ unionIndex909));
+            }
+        }
+        int unionIndex910 = (decoder.readIndex());
+        if (unionIndex910 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, null);
+        } else {
+            if (unionIndex910 == 1) {
+                Utf8 charSequence910;
+                Object oldString910 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(910);
+                if (oldString910 instanceof Utf8) {
+                    charSequence910 = (decoder).readString(((Utf8) oldString910));
+                } else {
+                    charSequence910 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, charSequence910);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F910': "+ unionIndex910));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex911 = (decoder.readIndex());
+        if (unionIndex911 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, null);
+        } else {
+            if (unionIndex911 == 1) {
+                Utf8 charSequence911;
+                Object oldString911 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(911);
+                if (oldString911 instanceof Utf8) {
+                    charSequence911 = (decoder).readString(((Utf8) oldString911));
+                } else {
+                    charSequence911 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, charSequence911);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F911': "+ unionIndex911));
+            }
+        }
+        int unionIndex912 = (decoder.readIndex());
+        if (unionIndex912 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, null);
+        } else {
+            if (unionIndex912 == 1) {
+                Utf8 charSequence912;
+                Object oldString912 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(912);
+                if (oldString912 instanceof Utf8) {
+                    charSequence912 = (decoder).readString(((Utf8) oldString912));
+                } else {
+                    charSequence912 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, charSequence912);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F912': "+ unionIndex912));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex913 = (decoder.readIndex());
+        if (unionIndex913 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, null);
+        } else {
+            if (unionIndex913 == 1) {
+                Utf8 charSequence913;
+                Object oldString913 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(913);
+                if (oldString913 instanceof Utf8) {
+                    charSequence913 = (decoder).readString(((Utf8) oldString913));
+                } else {
+                    charSequence913 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, charSequence913);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F913': "+ unionIndex913));
+            }
+        }
+        int unionIndex914 = (decoder.readIndex());
+        if (unionIndex914 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, null);
+        } else {
+            if (unionIndex914 == 1) {
+                Utf8 charSequence914;
+                Object oldString914 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(914);
+                if (oldString914 instanceof Utf8) {
+                    charSequence914 = (decoder).readString(((Utf8) oldString914));
+                } else {
+                    charSequence914 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, charSequence914);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F914': "+ unionIndex914));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex915 = (decoder.readIndex());
+        if (unionIndex915 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, null);
+        } else {
+            if (unionIndex915 == 1) {
+                Utf8 charSequence915;
+                Object oldString915 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(915);
+                if (oldString915 instanceof Utf8) {
+                    charSequence915 = (decoder).readString(((Utf8) oldString915));
+                } else {
+                    charSequence915 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, charSequence915);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F915': "+ unionIndex915));
+            }
+        }
+        int unionIndex916 = (decoder.readIndex());
+        if (unionIndex916 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, null);
+        } else {
+            if (unionIndex916 == 1) {
+                Utf8 charSequence916;
+                Object oldString916 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(916);
+                if (oldString916 instanceof Utf8) {
+                    charSequence916 = (decoder).readString(((Utf8) oldString916));
+                } else {
+                    charSequence916 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, charSequence916);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F916': "+ unionIndex916));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex917 = (decoder.readIndex());
+        if (unionIndex917 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, null);
+        } else {
+            if (unionIndex917 == 1) {
+                Utf8 charSequence917;
+                Object oldString917 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(917);
+                if (oldString917 instanceof Utf8) {
+                    charSequence917 = (decoder).readString(((Utf8) oldString917));
+                } else {
+                    charSequence917 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, charSequence917);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F917': "+ unionIndex917));
+            }
+        }
+        int unionIndex918 = (decoder.readIndex());
+        if (unionIndex918 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, null);
+        } else {
+            if (unionIndex918 == 1) {
+                Utf8 charSequence918;
+                Object oldString918 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(918);
+                if (oldString918 instanceof Utf8) {
+                    charSequence918 = (decoder).readString(((Utf8) oldString918));
+                } else {
+                    charSequence918 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, charSequence918);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F918': "+ unionIndex918));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex919 = (decoder.readIndex());
+        if (unionIndex919 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, null);
+        } else {
+            if (unionIndex919 == 1) {
+                Utf8 charSequence919;
+                Object oldString919 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(919);
+                if (oldString919 instanceof Utf8) {
+                    charSequence919 = (decoder).readString(((Utf8) oldString919));
+                } else {
+                    charSequence919 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, charSequence919);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F919': "+ unionIndex919));
+            }
+        }
+        int unionIndex920 = (decoder.readIndex());
+        if (unionIndex920 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, null);
+        } else {
+            if (unionIndex920 == 1) {
+                Utf8 charSequence920;
+                Object oldString920 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(920);
+                if (oldString920 instanceof Utf8) {
+                    charSequence920 = (decoder).readString(((Utf8) oldString920));
+                } else {
+                    charSequence920 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, charSequence920);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F920': "+ unionIndex920));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex921 = (decoder.readIndex());
+        if (unionIndex921 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, null);
+        } else {
+            if (unionIndex921 == 1) {
+                Utf8 charSequence921;
+                Object oldString921 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(921);
+                if (oldString921 instanceof Utf8) {
+                    charSequence921 = (decoder).readString(((Utf8) oldString921));
+                } else {
+                    charSequence921 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, charSequence921);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F921': "+ unionIndex921));
+            }
+        }
+        int unionIndex922 = (decoder.readIndex());
+        if (unionIndex922 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, null);
+        } else {
+            if (unionIndex922 == 1) {
+                Utf8 charSequence922;
+                Object oldString922 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(922);
+                if (oldString922 instanceof Utf8) {
+                    charSequence922 = (decoder).readString(((Utf8) oldString922));
+                } else {
+                    charSequence922 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, charSequence922);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F922': "+ unionIndex922));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex923 = (decoder.readIndex());
+        if (unionIndex923 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, null);
+        } else {
+            if (unionIndex923 == 1) {
+                Utf8 charSequence923;
+                Object oldString923 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(923);
+                if (oldString923 instanceof Utf8) {
+                    charSequence923 = (decoder).readString(((Utf8) oldString923));
+                } else {
+                    charSequence923 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, charSequence923);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F923': "+ unionIndex923));
+            }
+        }
+        int unionIndex924 = (decoder.readIndex());
+        if (unionIndex924 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, null);
+        } else {
+            if (unionIndex924 == 1) {
+                Utf8 charSequence924;
+                Object oldString924 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(924);
+                if (oldString924 instanceof Utf8) {
+                    charSequence924 = (decoder).readString(((Utf8) oldString924));
+                } else {
+                    charSequence924 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, charSequence924);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F924': "+ unionIndex924));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex925 = (decoder.readIndex());
+        if (unionIndex925 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, null);
+        } else {
+            if (unionIndex925 == 1) {
+                Utf8 charSequence925;
+                Object oldString925 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(925);
+                if (oldString925 instanceof Utf8) {
+                    charSequence925 = (decoder).readString(((Utf8) oldString925));
+                } else {
+                    charSequence925 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, charSequence925);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F925': "+ unionIndex925));
+            }
+        }
+        int unionIndex926 = (decoder.readIndex());
+        if (unionIndex926 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, null);
+        } else {
+            if (unionIndex926 == 1) {
+                Utf8 charSequence926;
+                Object oldString926 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(926);
+                if (oldString926 instanceof Utf8) {
+                    charSequence926 = (decoder).readString(((Utf8) oldString926));
+                } else {
+                    charSequence926 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, charSequence926);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F926': "+ unionIndex926));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex927 = (decoder.readIndex());
+        if (unionIndex927 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, null);
+        } else {
+            if (unionIndex927 == 1) {
+                Utf8 charSequence927;
+                Object oldString927 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(927);
+                if (oldString927 instanceof Utf8) {
+                    charSequence927 = (decoder).readString(((Utf8) oldString927));
+                } else {
+                    charSequence927 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, charSequence927);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F927': "+ unionIndex927));
+            }
+        }
+        int unionIndex928 = (decoder.readIndex());
+        if (unionIndex928 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, null);
+        } else {
+            if (unionIndex928 == 1) {
+                Utf8 charSequence928;
+                Object oldString928 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(928);
+                if (oldString928 instanceof Utf8) {
+                    charSequence928 = (decoder).readString(((Utf8) oldString928));
+                } else {
+                    charSequence928 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, charSequence928);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F928': "+ unionIndex928));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex929 = (decoder.readIndex());
+        if (unionIndex929 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, null);
+        } else {
+            if (unionIndex929 == 1) {
+                Utf8 charSequence929;
+                Object oldString929 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(929);
+                if (oldString929 instanceof Utf8) {
+                    charSequence929 = (decoder).readString(((Utf8) oldString929));
+                } else {
+                    charSequence929 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, charSequence929);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F929': "+ unionIndex929));
+            }
+        }
+        int unionIndex930 = (decoder.readIndex());
+        if (unionIndex930 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, null);
+        } else {
+            if (unionIndex930 == 1) {
+                Utf8 charSequence930;
+                Object oldString930 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(930);
+                if (oldString930 instanceof Utf8) {
+                    charSequence930 = (decoder).readString(((Utf8) oldString930));
+                } else {
+                    charSequence930 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, charSequence930);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F930': "+ unionIndex930));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex931 = (decoder.readIndex());
+        if (unionIndex931 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, null);
+        } else {
+            if (unionIndex931 == 1) {
+                Utf8 charSequence931;
+                Object oldString931 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(931);
+                if (oldString931 instanceof Utf8) {
+                    charSequence931 = (decoder).readString(((Utf8) oldString931));
+                } else {
+                    charSequence931 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, charSequence931);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F931': "+ unionIndex931));
+            }
+        }
+        int unionIndex932 = (decoder.readIndex());
+        if (unionIndex932 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, null);
+        } else {
+            if (unionIndex932 == 1) {
+                Utf8 charSequence932;
+                Object oldString932 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(932);
+                if (oldString932 instanceof Utf8) {
+                    charSequence932 = (decoder).readString(((Utf8) oldString932));
+                } else {
+                    charSequence932 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, charSequence932);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F932': "+ unionIndex932));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex933 = (decoder.readIndex());
+        if (unionIndex933 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, null);
+        } else {
+            if (unionIndex933 == 1) {
+                Utf8 charSequence933;
+                Object oldString933 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(933);
+                if (oldString933 instanceof Utf8) {
+                    charSequence933 = (decoder).readString(((Utf8) oldString933));
+                } else {
+                    charSequence933 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, charSequence933);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F933': "+ unionIndex933));
+            }
+        }
+        int unionIndex934 = (decoder.readIndex());
+        if (unionIndex934 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, null);
+        } else {
+            if (unionIndex934 == 1) {
+                Utf8 charSequence934;
+                Object oldString934 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(934);
+                if (oldString934 instanceof Utf8) {
+                    charSequence934 = (decoder).readString(((Utf8) oldString934));
+                } else {
+                    charSequence934 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, charSequence934);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F934': "+ unionIndex934));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex935 = (decoder.readIndex());
+        if (unionIndex935 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, null);
+        } else {
+            if (unionIndex935 == 1) {
+                Utf8 charSequence935;
+                Object oldString935 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(935);
+                if (oldString935 instanceof Utf8) {
+                    charSequence935 = (decoder).readString(((Utf8) oldString935));
+                } else {
+                    charSequence935 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, charSequence935);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F935': "+ unionIndex935));
+            }
+        }
+        int unionIndex936 = (decoder.readIndex());
+        if (unionIndex936 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, null);
+        } else {
+            if (unionIndex936 == 1) {
+                Utf8 charSequence936;
+                Object oldString936 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(936);
+                if (oldString936 instanceof Utf8) {
+                    charSequence936 = (decoder).readString(((Utf8) oldString936));
+                } else {
+                    charSequence936 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, charSequence936);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F936': "+ unionIndex936));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex937 = (decoder.readIndex());
+        if (unionIndex937 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, null);
+        } else {
+            if (unionIndex937 == 1) {
+                Utf8 charSequence937;
+                Object oldString937 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(937);
+                if (oldString937 instanceof Utf8) {
+                    charSequence937 = (decoder).readString(((Utf8) oldString937));
+                } else {
+                    charSequence937 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, charSequence937);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F937': "+ unionIndex937));
+            }
+        }
+        int unionIndex938 = (decoder.readIndex());
+        if (unionIndex938 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, null);
+        } else {
+            if (unionIndex938 == 1) {
+                Utf8 charSequence938;
+                Object oldString938 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(938);
+                if (oldString938 instanceof Utf8) {
+                    charSequence938 = (decoder).readString(((Utf8) oldString938));
+                } else {
+                    charSequence938 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, charSequence938);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F938': "+ unionIndex938));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex939 = (decoder.readIndex());
+        if (unionIndex939 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, null);
+        } else {
+            if (unionIndex939 == 1) {
+                Utf8 charSequence939;
+                Object oldString939 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(939);
+                if (oldString939 instanceof Utf8) {
+                    charSequence939 = (decoder).readString(((Utf8) oldString939));
+                } else {
+                    charSequence939 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, charSequence939);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F939': "+ unionIndex939));
+            }
+        }
+        int unionIndex940 = (decoder.readIndex());
+        if (unionIndex940 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, null);
+        } else {
+            if (unionIndex940 == 1) {
+                Utf8 charSequence940;
+                Object oldString940 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(940);
+                if (oldString940 instanceof Utf8) {
+                    charSequence940 = (decoder).readString(((Utf8) oldString940));
+                } else {
+                    charSequence940 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, charSequence940);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F940': "+ unionIndex940));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex941 = (decoder.readIndex());
+        if (unionIndex941 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, null);
+        } else {
+            if (unionIndex941 == 1) {
+                Utf8 charSequence941;
+                Object oldString941 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(941);
+                if (oldString941 instanceof Utf8) {
+                    charSequence941 = (decoder).readString(((Utf8) oldString941));
+                } else {
+                    charSequence941 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, charSequence941);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F941': "+ unionIndex941));
+            }
+        }
+        int unionIndex942 = (decoder.readIndex());
+        if (unionIndex942 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, null);
+        } else {
+            if (unionIndex942 == 1) {
+                Utf8 charSequence942;
+                Object oldString942 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(942);
+                if (oldString942 instanceof Utf8) {
+                    charSequence942 = (decoder).readString(((Utf8) oldString942));
+                } else {
+                    charSequence942 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, charSequence942);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F942': "+ unionIndex942));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex943 = (decoder.readIndex());
+        if (unionIndex943 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, null);
+        } else {
+            if (unionIndex943 == 1) {
+                Utf8 charSequence943;
+                Object oldString943 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(943);
+                if (oldString943 instanceof Utf8) {
+                    charSequence943 = (decoder).readString(((Utf8) oldString943));
+                } else {
+                    charSequence943 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, charSequence943);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F943': "+ unionIndex943));
+            }
+        }
+        int unionIndex944 = (decoder.readIndex());
+        if (unionIndex944 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, null);
+        } else {
+            if (unionIndex944 == 1) {
+                Utf8 charSequence944;
+                Object oldString944 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(944);
+                if (oldString944 instanceof Utf8) {
+                    charSequence944 = (decoder).readString(((Utf8) oldString944));
+                } else {
+                    charSequence944 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, charSequence944);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F944': "+ unionIndex944));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex945 = (decoder.readIndex());
+        if (unionIndex945 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, null);
+        } else {
+            if (unionIndex945 == 1) {
+                Utf8 charSequence945;
+                Object oldString945 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(945);
+                if (oldString945 instanceof Utf8) {
+                    charSequence945 = (decoder).readString(((Utf8) oldString945));
+                } else {
+                    charSequence945 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, charSequence945);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F945': "+ unionIndex945));
+            }
+        }
+        int unionIndex946 = (decoder.readIndex());
+        if (unionIndex946 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, null);
+        } else {
+            if (unionIndex946 == 1) {
+                Utf8 charSequence946;
+                Object oldString946 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(946);
+                if (oldString946 instanceof Utf8) {
+                    charSequence946 = (decoder).readString(((Utf8) oldString946));
+                } else {
+                    charSequence946 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, charSequence946);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F946': "+ unionIndex946));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex947 = (decoder.readIndex());
+        if (unionIndex947 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, null);
+        } else {
+            if (unionIndex947 == 1) {
+                Utf8 charSequence947;
+                Object oldString947 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(947);
+                if (oldString947 instanceof Utf8) {
+                    charSequence947 = (decoder).readString(((Utf8) oldString947));
+                } else {
+                    charSequence947 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, charSequence947);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F947': "+ unionIndex947));
+            }
+        }
+        int unionIndex948 = (decoder.readIndex());
+        if (unionIndex948 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, null);
+        } else {
+            if (unionIndex948 == 1) {
+                Utf8 charSequence948;
+                Object oldString948 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(948);
+                if (oldString948 instanceof Utf8) {
+                    charSequence948 = (decoder).readString(((Utf8) oldString948));
+                } else {
+                    charSequence948 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, charSequence948);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F948': "+ unionIndex948));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex949 = (decoder.readIndex());
+        if (unionIndex949 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, null);
+        } else {
+            if (unionIndex949 == 1) {
+                Utf8 charSequence949;
+                Object oldString949 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(949);
+                if (oldString949 instanceof Utf8) {
+                    charSequence949 = (decoder).readString(((Utf8) oldString949));
+                } else {
+                    charSequence949 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, charSequence949);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F949': "+ unionIndex949));
+            }
+        }
+        int unionIndex950 = (decoder.readIndex());
+        if (unionIndex950 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, null);
+        } else {
+            if (unionIndex950 == 1) {
+                Utf8 charSequence950;
+                Object oldString950 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(950);
+                if (oldString950 instanceof Utf8) {
+                    charSequence950 = (decoder).readString(((Utf8) oldString950));
+                } else {
+                    charSequence950 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, charSequence950);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F950': "+ unionIndex950));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex951 = (decoder.readIndex());
+        if (unionIndex951 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, null);
+        } else {
+            if (unionIndex951 == 1) {
+                Utf8 charSequence951;
+                Object oldString951 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(951);
+                if (oldString951 instanceof Utf8) {
+                    charSequence951 = (decoder).readString(((Utf8) oldString951));
+                } else {
+                    charSequence951 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, charSequence951);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F951': "+ unionIndex951));
+            }
+        }
+        int unionIndex952 = (decoder.readIndex());
+        if (unionIndex952 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, null);
+        } else {
+            if (unionIndex952 == 1) {
+                Utf8 charSequence952;
+                Object oldString952 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(952);
+                if (oldString952 instanceof Utf8) {
+                    charSequence952 = (decoder).readString(((Utf8) oldString952));
+                } else {
+                    charSequence952 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, charSequence952);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F952': "+ unionIndex952));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex953 = (decoder.readIndex());
+        if (unionIndex953 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, null);
+        } else {
+            if (unionIndex953 == 1) {
+                Utf8 charSequence953;
+                Object oldString953 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(953);
+                if (oldString953 instanceof Utf8) {
+                    charSequence953 = (decoder).readString(((Utf8) oldString953));
+                } else {
+                    charSequence953 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, charSequence953);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F953': "+ unionIndex953));
+            }
+        }
+        int unionIndex954 = (decoder.readIndex());
+        if (unionIndex954 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, null);
+        } else {
+            if (unionIndex954 == 1) {
+                Utf8 charSequence954;
+                Object oldString954 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(954);
+                if (oldString954 instanceof Utf8) {
+                    charSequence954 = (decoder).readString(((Utf8) oldString954));
+                } else {
+                    charSequence954 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, charSequence954);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F954': "+ unionIndex954));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex955 = (decoder.readIndex());
+        if (unionIndex955 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, null);
+        } else {
+            if (unionIndex955 == 1) {
+                Utf8 charSequence955;
+                Object oldString955 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(955);
+                if (oldString955 instanceof Utf8) {
+                    charSequence955 = (decoder).readString(((Utf8) oldString955));
+                } else {
+                    charSequence955 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, charSequence955);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F955': "+ unionIndex955));
+            }
+        }
+        int unionIndex956 = (decoder.readIndex());
+        if (unionIndex956 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, null);
+        } else {
+            if (unionIndex956 == 1) {
+                Utf8 charSequence956;
+                Object oldString956 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(956);
+                if (oldString956 instanceof Utf8) {
+                    charSequence956 = (decoder).readString(((Utf8) oldString956));
+                } else {
+                    charSequence956 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, charSequence956);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F956': "+ unionIndex956));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex957 = (decoder.readIndex());
+        if (unionIndex957 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, null);
+        } else {
+            if (unionIndex957 == 1) {
+                Utf8 charSequence957;
+                Object oldString957 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(957);
+                if (oldString957 instanceof Utf8) {
+                    charSequence957 = (decoder).readString(((Utf8) oldString957));
+                } else {
+                    charSequence957 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, charSequence957);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F957': "+ unionIndex957));
+            }
+        }
+        int unionIndex958 = (decoder.readIndex());
+        if (unionIndex958 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, null);
+        } else {
+            if (unionIndex958 == 1) {
+                Utf8 charSequence958;
+                Object oldString958 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(958);
+                if (oldString958 instanceof Utf8) {
+                    charSequence958 = (decoder).readString(((Utf8) oldString958));
+                } else {
+                    charSequence958 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, charSequence958);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F958': "+ unionIndex958));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex959 = (decoder.readIndex());
+        if (unionIndex959 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, null);
+        } else {
+            if (unionIndex959 == 1) {
+                Utf8 charSequence959;
+                Object oldString959 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(959);
+                if (oldString959 instanceof Utf8) {
+                    charSequence959 = (decoder).readString(((Utf8) oldString959));
+                } else {
+                    charSequence959 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, charSequence959);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F959': "+ unionIndex959));
+            }
+        }
+        int unionIndex960 = (decoder.readIndex());
+        if (unionIndex960 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, null);
+        } else {
+            if (unionIndex960 == 1) {
+                Utf8 charSequence960;
+                Object oldString960 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(960);
+                if (oldString960 instanceof Utf8) {
+                    charSequence960 = (decoder).readString(((Utf8) oldString960));
+                } else {
+                    charSequence960 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, charSequence960);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F960': "+ unionIndex960));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex961 = (decoder.readIndex());
+        if (unionIndex961 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, null);
+        } else {
+            if (unionIndex961 == 1) {
+                Utf8 charSequence961;
+                Object oldString961 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(961);
+                if (oldString961 instanceof Utf8) {
+                    charSequence961 = (decoder).readString(((Utf8) oldString961));
+                } else {
+                    charSequence961 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, charSequence961);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F961': "+ unionIndex961));
+            }
+        }
+        int unionIndex962 = (decoder.readIndex());
+        if (unionIndex962 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, null);
+        } else {
+            if (unionIndex962 == 1) {
+                Utf8 charSequence962;
+                Object oldString962 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(962);
+                if (oldString962 instanceof Utf8) {
+                    charSequence962 = (decoder).readString(((Utf8) oldString962));
+                } else {
+                    charSequence962 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, charSequence962);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F962': "+ unionIndex962));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex963 = (decoder.readIndex());
+        if (unionIndex963 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, null);
+        } else {
+            if (unionIndex963 == 1) {
+                Utf8 charSequence963;
+                Object oldString963 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(963);
+                if (oldString963 instanceof Utf8) {
+                    charSequence963 = (decoder).readString(((Utf8) oldString963));
+                } else {
+                    charSequence963 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, charSequence963);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F963': "+ unionIndex963));
+            }
+        }
+        int unionIndex964 = (decoder.readIndex());
+        if (unionIndex964 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, null);
+        } else {
+            if (unionIndex964 == 1) {
+                Utf8 charSequence964;
+                Object oldString964 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(964);
+                if (oldString964 instanceof Utf8) {
+                    charSequence964 = (decoder).readString(((Utf8) oldString964));
+                } else {
+                    charSequence964 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, charSequence964);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F964': "+ unionIndex964));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex965 = (decoder.readIndex());
+        if (unionIndex965 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, null);
+        } else {
+            if (unionIndex965 == 1) {
+                Utf8 charSequence965;
+                Object oldString965 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(965);
+                if (oldString965 instanceof Utf8) {
+                    charSequence965 = (decoder).readString(((Utf8) oldString965));
+                } else {
+                    charSequence965 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, charSequence965);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F965': "+ unionIndex965));
+            }
+        }
+        int unionIndex966 = (decoder.readIndex());
+        if (unionIndex966 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, null);
+        } else {
+            if (unionIndex966 == 1) {
+                Utf8 charSequence966;
+                Object oldString966 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(966);
+                if (oldString966 instanceof Utf8) {
+                    charSequence966 = (decoder).readString(((Utf8) oldString966));
+                } else {
+                    charSequence966 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, charSequence966);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F966': "+ unionIndex966));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex967 = (decoder.readIndex());
+        if (unionIndex967 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, null);
+        } else {
+            if (unionIndex967 == 1) {
+                Utf8 charSequence967;
+                Object oldString967 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(967);
+                if (oldString967 instanceof Utf8) {
+                    charSequence967 = (decoder).readString(((Utf8) oldString967));
+                } else {
+                    charSequence967 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, charSequence967);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F967': "+ unionIndex967));
+            }
+        }
+        int unionIndex968 = (decoder.readIndex());
+        if (unionIndex968 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, null);
+        } else {
+            if (unionIndex968 == 1) {
+                Utf8 charSequence968;
+                Object oldString968 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(968);
+                if (oldString968 instanceof Utf8) {
+                    charSequence968 = (decoder).readString(((Utf8) oldString968));
+                } else {
+                    charSequence968 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, charSequence968);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F968': "+ unionIndex968));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex969 = (decoder.readIndex());
+        if (unionIndex969 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, null);
+        } else {
+            if (unionIndex969 == 1) {
+                Utf8 charSequence969;
+                Object oldString969 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(969);
+                if (oldString969 instanceof Utf8) {
+                    charSequence969 = (decoder).readString(((Utf8) oldString969));
+                } else {
+                    charSequence969 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, charSequence969);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F969': "+ unionIndex969));
+            }
+        }
+        int unionIndex970 = (decoder.readIndex());
+        if (unionIndex970 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, null);
+        } else {
+            if (unionIndex970 == 1) {
+                Utf8 charSequence970;
+                Object oldString970 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(970);
+                if (oldString970 instanceof Utf8) {
+                    charSequence970 = (decoder).readString(((Utf8) oldString970));
+                } else {
+                    charSequence970 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, charSequence970);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F970': "+ unionIndex970));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex971 = (decoder.readIndex());
+        if (unionIndex971 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, null);
+        } else {
+            if (unionIndex971 == 1) {
+                Utf8 charSequence971;
+                Object oldString971 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(971);
+                if (oldString971 instanceof Utf8) {
+                    charSequence971 = (decoder).readString(((Utf8) oldString971));
+                } else {
+                    charSequence971 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, charSequence971);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F971': "+ unionIndex971));
+            }
+        }
+        int unionIndex972 = (decoder.readIndex());
+        if (unionIndex972 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, null);
+        } else {
+            if (unionIndex972 == 1) {
+                Utf8 charSequence972;
+                Object oldString972 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(972);
+                if (oldString972 instanceof Utf8) {
+                    charSequence972 = (decoder).readString(((Utf8) oldString972));
+                } else {
+                    charSequence972 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, charSequence972);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F972': "+ unionIndex972));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex973 = (decoder.readIndex());
+        if (unionIndex973 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, null);
+        } else {
+            if (unionIndex973 == 1) {
+                Utf8 charSequence973;
+                Object oldString973 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(973);
+                if (oldString973 instanceof Utf8) {
+                    charSequence973 = (decoder).readString(((Utf8) oldString973));
+                } else {
+                    charSequence973 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, charSequence973);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F973': "+ unionIndex973));
+            }
+        }
+        int unionIndex974 = (decoder.readIndex());
+        if (unionIndex974 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, null);
+        } else {
+            if (unionIndex974 == 1) {
+                Utf8 charSequence974;
+                Object oldString974 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(974);
+                if (oldString974 instanceof Utf8) {
+                    charSequence974 = (decoder).readString(((Utf8) oldString974));
+                } else {
+                    charSequence974 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, charSequence974);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F974': "+ unionIndex974));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex975 = (decoder.readIndex());
+        if (unionIndex975 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, null);
+        } else {
+            if (unionIndex975 == 1) {
+                Utf8 charSequence975;
+                Object oldString975 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(975);
+                if (oldString975 instanceof Utf8) {
+                    charSequence975 = (decoder).readString(((Utf8) oldString975));
+                } else {
+                    charSequence975 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, charSequence975);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F975': "+ unionIndex975));
+            }
+        }
+        int unionIndex976 = (decoder.readIndex());
+        if (unionIndex976 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, null);
+        } else {
+            if (unionIndex976 == 1) {
+                Utf8 charSequence976;
+                Object oldString976 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(976);
+                if (oldString976 instanceof Utf8) {
+                    charSequence976 = (decoder).readString(((Utf8) oldString976));
+                } else {
+                    charSequence976 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, charSequence976);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F976': "+ unionIndex976));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex977 = (decoder.readIndex());
+        if (unionIndex977 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, null);
+        } else {
+            if (unionIndex977 == 1) {
+                Utf8 charSequence977;
+                Object oldString977 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(977);
+                if (oldString977 instanceof Utf8) {
+                    charSequence977 = (decoder).readString(((Utf8) oldString977));
+                } else {
+                    charSequence977 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, charSequence977);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F977': "+ unionIndex977));
+            }
+        }
+        int unionIndex978 = (decoder.readIndex());
+        if (unionIndex978 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, null);
+        } else {
+            if (unionIndex978 == 1) {
+                Utf8 charSequence978;
+                Object oldString978 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(978);
+                if (oldString978 instanceof Utf8) {
+                    charSequence978 = (decoder).readString(((Utf8) oldString978));
+                } else {
+                    charSequence978 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, charSequence978);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F978': "+ unionIndex978));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex979 = (decoder.readIndex());
+        if (unionIndex979 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, null);
+        } else {
+            if (unionIndex979 == 1) {
+                Utf8 charSequence979;
+                Object oldString979 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(979);
+                if (oldString979 instanceof Utf8) {
+                    charSequence979 = (decoder).readString(((Utf8) oldString979));
+                } else {
+                    charSequence979 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, charSequence979);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F979': "+ unionIndex979));
+            }
+        }
+        int unionIndex980 = (decoder.readIndex());
+        if (unionIndex980 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, null);
+        } else {
+            if (unionIndex980 == 1) {
+                Utf8 charSequence980;
+                Object oldString980 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(980);
+                if (oldString980 instanceof Utf8) {
+                    charSequence980 = (decoder).readString(((Utf8) oldString980));
+                } else {
+                    charSequence980 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, charSequence980);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F980': "+ unionIndex980));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex981 = (decoder.readIndex());
+        if (unionIndex981 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, null);
+        } else {
+            if (unionIndex981 == 1) {
+                Utf8 charSequence981;
+                Object oldString981 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(981);
+                if (oldString981 instanceof Utf8) {
+                    charSequence981 = (decoder).readString(((Utf8) oldString981));
+                } else {
+                    charSequence981 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, charSequence981);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F981': "+ unionIndex981));
+            }
+        }
+        int unionIndex982 = (decoder.readIndex());
+        if (unionIndex982 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, null);
+        } else {
+            if (unionIndex982 == 1) {
+                Utf8 charSequence982;
+                Object oldString982 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(982);
+                if (oldString982 instanceof Utf8) {
+                    charSequence982 = (decoder).readString(((Utf8) oldString982));
+                } else {
+                    charSequence982 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, charSequence982);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F982': "+ unionIndex982));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex983 = (decoder.readIndex());
+        if (unionIndex983 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, null);
+        } else {
+            if (unionIndex983 == 1) {
+                Utf8 charSequence983;
+                Object oldString983 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(983);
+                if (oldString983 instanceof Utf8) {
+                    charSequence983 = (decoder).readString(((Utf8) oldString983));
+                } else {
+                    charSequence983 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, charSequence983);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F983': "+ unionIndex983));
+            }
+        }
+        int unionIndex984 = (decoder.readIndex());
+        if (unionIndex984 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, null);
+        } else {
+            if (unionIndex984 == 1) {
+                Utf8 charSequence984;
+                Object oldString984 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(984);
+                if (oldString984 instanceof Utf8) {
+                    charSequence984 = (decoder).readString(((Utf8) oldString984));
+                } else {
+                    charSequence984 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, charSequence984);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F984': "+ unionIndex984));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex985 = (decoder.readIndex());
+        if (unionIndex985 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, null);
+        } else {
+            if (unionIndex985 == 1) {
+                Utf8 charSequence985;
+                Object oldString985 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(985);
+                if (oldString985 instanceof Utf8) {
+                    charSequence985 = (decoder).readString(((Utf8) oldString985));
+                } else {
+                    charSequence985 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, charSequence985);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F985': "+ unionIndex985));
+            }
+        }
+        int unionIndex986 = (decoder.readIndex());
+        if (unionIndex986 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, null);
+        } else {
+            if (unionIndex986 == 1) {
+                Utf8 charSequence986;
+                Object oldString986 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(986);
+                if (oldString986 instanceof Utf8) {
+                    charSequence986 = (decoder).readString(((Utf8) oldString986));
+                } else {
+                    charSequence986 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, charSequence986);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F986': "+ unionIndex986));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex987 = (decoder.readIndex());
+        if (unionIndex987 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, null);
+        } else {
+            if (unionIndex987 == 1) {
+                Utf8 charSequence987;
+                Object oldString987 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(987);
+                if (oldString987 instanceof Utf8) {
+                    charSequence987 = (decoder).readString(((Utf8) oldString987));
+                } else {
+                    charSequence987 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, charSequence987);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F987': "+ unionIndex987));
+            }
+        }
+        int unionIndex988 = (decoder.readIndex());
+        if (unionIndex988 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, null);
+        } else {
+            if (unionIndex988 == 1) {
+                Utf8 charSequence988;
+                Object oldString988 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(988);
+                if (oldString988 instanceof Utf8) {
+                    charSequence988 = (decoder).readString(((Utf8) oldString988));
+                } else {
+                    charSequence988 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, charSequence988);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F988': "+ unionIndex988));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex989 = (decoder.readIndex());
+        if (unionIndex989 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, null);
+        } else {
+            if (unionIndex989 == 1) {
+                Utf8 charSequence989;
+                Object oldString989 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(989);
+                if (oldString989 instanceof Utf8) {
+                    charSequence989 = (decoder).readString(((Utf8) oldString989));
+                } else {
+                    charSequence989 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, charSequence989);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F989': "+ unionIndex989));
+            }
+        }
+        int unionIndex990 = (decoder.readIndex());
+        if (unionIndex990 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, null);
+        } else {
+            if (unionIndex990 == 1) {
+                Utf8 charSequence990;
+                Object oldString990 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(990);
+                if (oldString990 instanceof Utf8) {
+                    charSequence990 = (decoder).readString(((Utf8) oldString990));
+                } else {
+                    charSequence990 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, charSequence990);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F990': "+ unionIndex990));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex991 = (decoder.readIndex());
+        if (unionIndex991 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, null);
+        } else {
+            if (unionIndex991 == 1) {
+                Utf8 charSequence991;
+                Object oldString991 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(991);
+                if (oldString991 instanceof Utf8) {
+                    charSequence991 = (decoder).readString(((Utf8) oldString991));
+                } else {
+                    charSequence991 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, charSequence991);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F991': "+ unionIndex991));
+            }
+        }
+        int unionIndex992 = (decoder.readIndex());
+        if (unionIndex992 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, null);
+        } else {
+            if (unionIndex992 == 1) {
+                Utf8 charSequence992;
+                Object oldString992 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(992);
+                if (oldString992 instanceof Utf8) {
+                    charSequence992 = (decoder).readString(((Utf8) oldString992));
+                } else {
+                    charSequence992 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, charSequence992);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F992': "+ unionIndex992));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex993 = (decoder.readIndex());
+        if (unionIndex993 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, null);
+        } else {
+            if (unionIndex993 == 1) {
+                Utf8 charSequence993;
+                Object oldString993 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(993);
+                if (oldString993 instanceof Utf8) {
+                    charSequence993 = (decoder).readString(((Utf8) oldString993));
+                } else {
+                    charSequence993 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, charSequence993);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F993': "+ unionIndex993));
+            }
+        }
+        int unionIndex994 = (decoder.readIndex());
+        if (unionIndex994 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, null);
+        } else {
+            if (unionIndex994 == 1) {
+                Utf8 charSequence994;
+                Object oldString994 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(994);
+                if (oldString994 instanceof Utf8) {
+                    charSequence994 = (decoder).readString(((Utf8) oldString994));
+                } else {
+                    charSequence994 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, charSequence994);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F994': "+ unionIndex994));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex995 = (decoder.readIndex());
+        if (unionIndex995 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, null);
+        } else {
+            if (unionIndex995 == 1) {
+                Utf8 charSequence995;
+                Object oldString995 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(995);
+                if (oldString995 instanceof Utf8) {
+                    charSequence995 = (decoder).readString(((Utf8) oldString995));
+                } else {
+                    charSequence995 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, charSequence995);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F995': "+ unionIndex995));
+            }
+        }
+        int unionIndex996 = (decoder.readIndex());
+        if (unionIndex996 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, null);
+        } else {
+            if (unionIndex996 == 1) {
+                Utf8 charSequence996;
+                Object oldString996 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(996);
+                if (oldString996 instanceof Utf8) {
+                    charSequence996 = (decoder).readString(((Utf8) oldString996));
+                } else {
+                    charSequence996 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, charSequence996);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F996': "+ unionIndex996));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex997 = (decoder.readIndex());
+        if (unionIndex997 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, null);
+        } else {
+            if (unionIndex997 == 1) {
+                Utf8 charSequence997;
+                Object oldString997 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(997);
+                if (oldString997 instanceof Utf8) {
+                    charSequence997 = (decoder).readString(((Utf8) oldString997));
+                } else {
+                    charSequence997 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, charSequence997);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F997': "+ unionIndex997));
+            }
+        }
+        int unionIndex998 = (decoder.readIndex());
+        if (unionIndex998 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, null);
+        } else {
+            if (unionIndex998 == 1) {
+                Utf8 charSequence998;
+                Object oldString998 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(998);
+                if (oldString998 instanceof Utf8) {
+                    charSequence998 = (decoder).readString(((Utf8) oldString998));
+                } else {
+                    charSequence998 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, charSequence998);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F998': "+ unionIndex998));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex999 = (decoder.readIndex());
+        if (unionIndex999 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, null);
+        } else {
+            if (unionIndex999 == 1) {
+                Utf8 charSequence999;
+                Object oldString999 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(999);
+                if (oldString999 instanceof Utf8) {
+                    charSequence999 = (decoder).readString(((Utf8) oldString999));
+                } else {
+                    charSequence999 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, charSequence999);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F999': "+ unionIndex999));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
new file mode 100644
index 000000000..c8a15b1c8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testString0;
+    private final Schema testStringUnionAlias0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testString0 = readerSchema.getField("testString").schema();
+        this.testStringUnionAlias0 = readerSchema.getField("testStringUnionAlias").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testString': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0((FastGenericDeserializerGeneratorTest_shouldReadAliasedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnionAlias': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
new file mode 100644
index 000000000..96dd21bec
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
@@ -0,0 +1,122 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Schema testEnumUnion0;
+    private final Schema testEnumArray0;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(0, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                testEnumArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        testEnumUnionArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
new file mode 100644
index 000000000..2707d25eb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testFixed0;
+    private final Schema testFixedUnion0;
+    private final Schema testFixedArray0;
+    private final Schema testFixedUnionArray0;
+    private final Schema testFixedUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testFixed0 = readerSchema.getField("testFixed").schema();
+        this.testFixedUnion0 = readerSchema.getField("testFixedUnion").schema();
+        this.testFixedArray0 = readerSchema.getField("testFixedArray").schema();
+        this.testFixedUnionArray0 = readerSchema.getField("testFixedUnionArray").schema();
+        this.testFixedUnionArrayArrayElemSchema0 = testFixedUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        byte[] testFixed1;
+        Object oldFixed0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(0);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (2))) {
+            testFixed1 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed1 = ( new byte[2]);
+        }
+        decoder.readFixed(testFixed1);
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(0, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed1));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadFixed;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(1);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (2))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed2);
+                FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed2));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericFixed> testFixedArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(2);
+        if (oldArray0 instanceof List) {
+            testFixedArray1 = ((List) oldArray0);
+            testFixedArray1 .clear();
+        } else {
+            testFixedArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen0), testFixedArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed3;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (2))) {
+                    testFixed3 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed3 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed3);
+                testFixedArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed3));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(2, testFixedArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(3);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray1 = ((List) oldArray1);
+            testFixedUnionArray1 .clear();
+        } else {
+            testFixedUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen1), testFixedUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        byte[] testFixed4;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (2))) {
+                            testFixed4 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed4 = ( new byte[2]);
+                        }
+                        decoder.readFixed(testFixed4);
+                        testFixedUnionArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed4));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(3, testFixedUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
new file mode 100644
index 000000000..1d0a15adc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
@@ -0,0 +1,102 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema union0;
+    private final Schema unionOptionSchema0;
+    private final Schema subField0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.union0 = readerSchema.getField("union").schema();
+        this.unionOptionSchema0 = union0 .getTypes().get(1);
+        this.subField0 = unionOptionSchema0 .getField("subField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence1;
+                    Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0);
+                    if (oldString1 instanceof Utf8) {
+                        charSequence1 = (decoder).readString(((Utf8) oldString1));
+                    } else {
+                        charSequence1 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, charSequence1);
+                } else {
+                    if (unionIndex0 == 3) {
+                        FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+                    }
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(unionOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
new file mode 100644
index 000000000..976d3b545
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
@@ -0,0 +1,129 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapField0;
+    private final Schema mapFieldMapValueSchema0;
+    private final Schema mapFieldValueMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapField0 = readerSchema.getField("mapField").schema();
+        this.mapFieldMapValueSchema0 = mapField0 .getValueType();
+        this.mapFieldValueMapValueSchema0 = mapFieldMapValueSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Map<Utf8, List<Integer>>> mapField1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
+                if (oldMap0 instanceof Map) {
+                    mapFieldReuse0 = ((Map) oldMap0);
+                }
+                if (mapFieldReuse0 != (null)) {
+                    mapFieldReuse0 .clear();
+                    mapField1 = mapFieldReuse0;
+                } else {
+                    mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Map<Utf8, List<Integer>> mapFieldValue0 = null;
+                    long chunkLen1 = (decoder.readMapStart());
+                    if (chunkLen1 > 0) {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, ((int) chunkLen1)));
+                        } else {
+                            Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
+                            if (null instanceof Map) {
+                                mapFieldValueReuse0 = ((Map) null);
+                            }
+                            if (mapFieldValueReuse0 != (null)) {
+                                mapFieldValueReuse0 .clear();
+                                mapFieldValue0 = mapFieldValueReuse0;
+                            } else {
+                                mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                            }
+                        }
+                        do {
+                            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                                Utf8 key1 = (decoder.readString(null));
+                                PrimitiveIntList mapFieldValueValue0 = null;
+                                long chunkLen2 = (decoder.readArrayStart());
+                                if (null instanceof PrimitiveIntList) {
+                                    mapFieldValueValue0 = ((PrimitiveIntList) null);
+                                    mapFieldValueValue0 .clear();
+                                } else {
+                                    mapFieldValueValue0 = new PrimitiveIntArrayList(((int) chunkLen2));
+                                }
+                                while (chunkLen2 > 0) {
+                                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                                        mapFieldValueValue0 .addPrimitive((decoder.readInt()));
+                                    }
+                                    chunkLen2 = (decoder.arrayNext());
+                                }
+                                mapFieldValue0 .put(key1, mapFieldValueValue0);
+                            }
+                            chunkLen1 = (decoder.mapNext());
+                        } while (chunkLen1 > 0);
+                    } else {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, 0));
+                        } else {
+                            mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+                        }
+                    }
+                    mapField1 .put(key0, mapFieldValue0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), 0));
+            } else {
+                mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadNestedMap.put(0, mapField1);
+        return FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
new file mode 100644
index 000000000..9eece5b23
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
@@ -0,0 +1,206 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(1));
+        tempEnumMapping0 .put(new Integer(1), new Integer(0));
+        tempEnumMapping0 .put(new Integer(2), new Integer(4));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(1));
+        tempEnumMapping1 .put(new Integer(1), new Integer(0));
+        tempEnumMapping1 .put(new Integer(2), new Integer(4));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(1));
+        tempEnumMapping2 .put(new Integer(1), new Integer(0));
+        tempEnumMapping2 .put(new Integer(2), new Integer(4));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(1));
+        tempEnumMapping3 .put(new Integer(1), new Integer(0));
+        tempEnumMapping3 .put(new Integer(2), new Integer(4));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
new file mode 100644
index 000000000..9ff64397e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
@@ -0,0 +1,209 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testIntUnion0;
+    private final Schema testStringUnion0;
+    private final Schema testLongUnion0;
+    private final Schema testDoubleUnion0;
+    private final Schema testFloatUnion0;
+    private final Schema testBooleanUnion0;
+    private final Schema testBytesUnion0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testIntUnion0 = readerSchema.getField("testIntUnion").schema();
+        this.testStringUnion0 = readerSchema.getField("testStringUnion").schema();
+        this.testLongUnion0 = readerSchema.getField("testLongUnion").schema();
+        this.testDoubleUnion0 = readerSchema.getField("testDoubleUnion").schema();
+        this.testFloatUnion0 = readerSchema.getField("testFloatUnion").schema();
+        this.testBooleanUnion0 = readerSchema.getField("testBooleanUnion").schema();
+        this.testBytesUnion0 = readerSchema.getField("testBytesUnion").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(0, (decoder.readInt()));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(2);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(2, charSequence0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(3);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex1));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(4, (decoder.readLong()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(6, (decoder.readDouble()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(8, (decoder.readFloat()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(10, (decoder.readBoolean()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(12);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(12, byteBuffer0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(13);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
new file mode 100644
index 000000000..fe5fa75c5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
@@ -0,0 +1,160 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema intFieldField0;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.intFieldField0 = record10 .getField("intField").schema();
+        this.intField0 = record10 .getField("intField").schema();
+        this.subField1 = record10 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        subRecord.put(0, null);
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                subRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex1));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = subRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
new file mode 100644
index 000000000..efefe7881
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
@@ -0,0 +1,175 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema record20;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.record20 = readerSchema.getField("record2").schema();
+        this.intField0 = record20 .getField("intField").schema();
+        this.subField1 = record20 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex0));
+            }
+        }
+        populate_aliasedSubRecord0((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = aliasedSubRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record20)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record20);
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                aliasedSubRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex2));
+            }
+        }
+        populate_aliasedSubRecord1((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord1(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = aliasedSubRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
new file mode 100644
index 000000000..b79c8c112
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArray0;
+    private final Schema recordsArrayArrayElemSchema0;
+    private final Schema subField0;
+    private final Schema recordsMap0;
+    private final Schema recordsArrayUnion0;
+    private final Schema recordsArrayUnionOptionSchema0;
+    private final Schema recordsArrayUnionOptionArrayElemSchema0;
+    private final Schema recordsMapUnion0;
+    private final Schema recordsMapUnionOptionSchema0;
+    private final Schema recordsMapUnionOptionMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArray0 = readerSchema.getField("recordsArray").schema();
+        this.recordsArrayArrayElemSchema0 = recordsArray0 .getElementType();
+        this.subField0 = recordsArrayArrayElemSchema0 .getField("subField").schema();
+        this.recordsMap0 = readerSchema.getField("recordsMap").schema();
+        this.recordsArrayUnion0 = readerSchema.getField("recordsArrayUnion").schema();
+        this.recordsArrayUnionOptionSchema0 = recordsArrayUnion0 .getTypes().get(1);
+        this.recordsArrayUnionOptionArrayElemSchema0 = recordsArrayUnionOptionSchema0 .getElementType();
+        this.recordsMapUnion0 = readerSchema.getField("recordsMapUnion").schema();
+        this.recordsMapUnionOptionSchema0 = recordsMapUnion0 .getTypes().get(1);
+        this.recordsMapUnionOptionMapValueSchema0 = recordsMapUnionOptionSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<IndexedRecord> recordsArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArray1 = ((List) oldArray0);
+            recordsArray1 .clear();
+        } else {
+            recordsArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordsArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(0, recordsArray1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayArrayElemSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> recordsMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap1 = recordsMapReuse0;
+                } else {
+                    recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), 0));
+            } else {
+                recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(1, recordsMap1);
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, null);
+        } else {
+            if (unionIndex1 == 1) {
+                List<IndexedRecord> recordsArrayUnionOption0 = null;
+                long chunkLen2 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray1);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen2), recordsArrayUnionOptionSchema0);
+                }
+                while (chunkLen2 > 0) {
+                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        int unionIndex2 = (decoder.readIndex());
+                        if (unionIndex2 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex2 == 1) {
+                                recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex2));
+                            }
+                        }
+                    }
+                    chunkLen2 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Map<Utf8, IndexedRecord> recordsMapUnionOption0 = null;
+                long chunkLen3 = (decoder.readMapStart());
+                if (chunkLen3 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), ((int) chunkLen3)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex4 = (decoder.readIndex());
+                            if (unionIndex4 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex4 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex4));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.mapNext());
+                    } while (chunkLen3 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
new file mode 100644
index 000000000..20ffce71d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
@@ -0,0 +1,378 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArrayMap0;
+    private final Schema recordsArrayMapArrayElemSchema0;
+    private final Schema recordsArrayMapElemMapValueSchema0;
+    private final Schema recordsArrayMapElemValueOptionSchema0;
+    private final Schema subField0;
+    private final Schema recordsMapArray0;
+    private final Schema recordsMapArrayMapValueSchema0;
+    private final Schema recordsMapArrayValueArrayElemSchema0;
+    private final Schema recordsArrayMapUnion0;
+    private final Schema recordsArrayMapUnionOptionArrayElemSchema0;
+    private final Schema recordsArrayMapUnionOptionElemMapValueSchema0;
+    private final Schema recordsMapArrayUnion0;
+    private final Schema recordsMapArrayUnionOptionSchema0;
+    private final Schema recordsMapArrayUnionOptionValueArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArrayMap0 = readerSchema.getField("recordsArrayMap").schema();
+        this.recordsArrayMapArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapElemMapValueSchema0 = recordsArrayMapArrayElemSchema0 .getValueType();
+        this.recordsArrayMapElemValueOptionSchema0 = recordsArrayMapElemMapValueSchema0 .getTypes().get(1);
+        this.subField0 = recordsArrayMapElemValueOptionSchema0 .getField("subField").schema();
+        this.recordsMapArray0 = readerSchema.getField("recordsMapArray").schema();
+        this.recordsMapArrayMapValueSchema0 = recordsMapArray0 .getValueType();
+        this.recordsMapArrayValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+        this.recordsArrayMapUnion0 = readerSchema.getField("recordsArrayMapUnion").schema();
+        this.recordsArrayMapUnionOptionArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapUnionOptionElemMapValueSchema0 = recordsArrayMapUnionOptionArrayElemSchema0 .getValueType();
+        this.recordsMapArrayUnion0 = readerSchema.getField("recordsMapArrayUnion").schema();
+        this.recordsMapArrayUnionOptionSchema0 = recordsMapArrayUnion0 .getTypes().get(1);
+        this.recordsMapArrayUnionOptionValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Map<Utf8, IndexedRecord>> recordsArrayMap1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArrayMap1 = ((List) oldArray0);
+            recordsArrayMap1 .clear();
+        } else {
+            recordsArrayMap1 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen0), recordsArrayMap0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Map<Utf8, IndexedRecord> recordsArrayMapElem0 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex0 = (decoder.readIndex());
+                            if (unionIndex0 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key0, null);
+                            } else {
+                                if (unionIndex0 == 1) {
+                                    recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex0));
+                                }
+                            }
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                recordsArrayMap1 .add(recordsArrayMapElem0);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(0, recordsArrayMap1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayMapElemValueOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayMapElemValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<IndexedRecord>> recordsMapArray1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray1 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    List<IndexedRecord> recordsMapArrayValue0 = null;
+                    long chunkLen3 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen3), recordsMapArrayMapValueSchema0);
+                    }
+                    while (chunkLen3 > 0) {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex2 = (decoder.readIndex());
+                            if (unionIndex2 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex2 == 1) {
+                                    recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex2));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.arrayNext());
+                    }
+                    recordsMapArray1 .put(key1, recordsMapArrayValue0);
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), 0));
+            } else {
+                recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(1, recordsMapArray1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                List<Map<Utf8, IndexedRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray1);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen4), recordsArrayMap0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen5 = (decoder.readMapStart());
+                        if (chunkLen5 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen5)));
+                            } else {
+                                Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                                    Utf8 key2 = (decoder.readString(null));
+                                    int unionIndex4 = (decoder.readIndex());
+                                    if (unionIndex4 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key2, null);
+                                    } else {
+                                        if (unionIndex4 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex4));
+                                        }
+                                    }
+                                }
+                                chunkLen5 = (decoder.mapNext());
+                            } while (chunkLen5 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readMapStart());
+                if (chunkLen6 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), ((int) chunkLen6)));
+                    } else {
+                        Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            List<IndexedRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen7 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen7), recordsMapArrayMapValueSchema0);
+                            }
+                            while (chunkLen7 > 0) {
+                                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex6 = (decoder.readIndex());
+                                    if (unionIndex6 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex6 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex6));
+                                        }
+                                    }
+                                }
+                                chunkLen7 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key3, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen6 = (decoder.mapNext());
+                    } while (chunkLen6 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
new file mode 100644
index 000000000..95d0433fe
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record0;
+    private final Schema recordOptionSchema0;
+    private final Schema subField0;
+    private final Schema field0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record0 = readerSchema.getField("record").schema();
+        this.recordOptionSchema0 = record0 .getTypes().get(1);
+        this.subField0 = recordOptionSchema0 .getField("subField").schema();
+        this.field0 = readerSchema.getField("field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'record': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder), (customization)));
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(2);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
new file mode 100644
index 000000000..135649e7a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testNotRemoved0;
+    private final Schema testNotRemoved20;
+    private final Schema subRecord0;
+    private final Schema subRecordOptionSchema0;
+    private final Schema testNotRemoved1;
+    private final Schema testNotRemoved21;
+    private final Schema subRecordMap0;
+    private final Schema subRecordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testNotRemoved0 = readerSchema.getField("testNotRemoved").schema();
+        this.testNotRemoved20 = readerSchema.getField("testNotRemoved2").schema();
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordOptionSchema0 = subRecord0 .getTypes().get(1);
+        this.testNotRemoved1 = subRecordOptionSchema0 .getField("testNotRemoved").schema();
+        this.testNotRemoved21 = subRecordOptionSchema0 .getField("testNotRemoved2").schema();
+        this.subRecordMap0 = readerSchema.getField("subRecordMap").schema();
+        this.subRecordArray0 = readerSchema.getField("subRecordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex3));
+            }
+        }
+        Map<Utf8, IndexedRecord> subRecordMap1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
+                if (oldMap0 instanceof Map) {
+                    subRecordMapReuse0 = ((Map) oldMap0);
+                }
+                if (subRecordMapReuse0 != (null)) {
+                    subRecordMapReuse0 .clear();
+                    subRecordMap1 = subRecordMapReuse0;
+                } else {
+                    subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), 0));
+            } else {
+                subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(3, subRecordMap1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordOptionSchema0);
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = subRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex4));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex5 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = subRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<IndexedRecord> subRecordArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(4);
+        if (oldArray0 instanceof List) {
+            subRecordArray1 = ((List) oldArray0);
+            subRecordArray1 .clear();
+        } else {
+            subRecordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen1), subRecordArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object subRecordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    subRecordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(4, subRecordArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
new file mode 100644
index 000000000..8cd6af430
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder), (customization)));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubSubRecord0(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subSubRecord0((decoder));
+    }
+
+    private void populate_subSubRecord0(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
new file mode 100644
index 000000000..0878f0b4f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord10;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord10 = readerSchema.getField("subRecord1").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord10);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubRecord20(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubRecord20(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subRecord20((decoder));
+    }
+
+    private void populate_subRecord20(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder), (customization)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
new file mode 100644
index 000000000..a4fb5ed7e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
new file mode 100644
index 000000000..4bd9586a0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
new file mode 100644
index 000000000..faf70c881
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException("Found \"long\", expecting [\"null\", \"string\"]");
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
new file mode 100644
index 000000000..69209d084
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
new file mode 100644
index 000000000..50bf210aa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
new file mode 100644
index 000000000..f75194392
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
new file mode 100644
index 000000000..8473eb6ae
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
new file mode 100644
index 000000000..9a8c9d8d3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
new file mode 100644
index 000000000..a9d77aa98
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
new file mode 100644
index 000000000..103913503
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
new file mode 100644
index 000000000..e61808ced
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
new file mode 100644
index 000000000..38a9f652d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
new file mode 100644
index 000000000..427ac26fb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
new file mode 100644
index 000000000..79eb49e4b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
new file mode 100644
index 000000000..ea955890a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
new file mode 100644
index 000000000..8d2655fd9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
new file mode 100644
index 000000000..2b789790d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
new file mode 100644
index 000000000..c813e3334
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
new file mode 100644
index 000000000..712f62a03
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
new file mode 100644
index 000000000..8b1c0455c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
new file mode 100644
index 000000000..e905639fb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(2);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
new file mode 100644
index 000000000..6e444a0ad
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
new file mode 100644
index 000000000..822c8fc1a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(2);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
new file mode 100644
index 000000000..25c61119a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
new file mode 100644
index 000000000..6dbcf5136
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
new file mode 100644
index 000000000..6a2244e4a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
@@ -0,0 +1,130 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
new file mode 100644
index 000000000..38b94d387
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
@@ -0,0 +1,130 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
new file mode 100644
index 000000000..97c0581c8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
@@ -0,0 +1,1071 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
new file mode 100644
index 000000000..8bd57211d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericDeserializer_2140000109_2140000109
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema mapValueOptionSchema0;
+    private final Schema field0;
+
+    public Map_of_UNION_GenericDeserializer_2140000109_2140000109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.mapValueOptionSchema0 = mapMapValueSchema0 .getTypes().get(1);
+        this.field0 = mapValueOptionSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapValueOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_UNION_SpecificDeserializer_971650236_971650236.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
new file mode 100644
index 000000000..9a00cd7d7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
@@ -0,0 +1,1081 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_SpecificDeserializer_971650236_971650236
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_UNION_SpecificDeserializer_971650236_971650236(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_record_GenericDeserializer_1223705675_568621313.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_record_GenericDeserializer_1223705675_568621313.java
new file mode 100644
index 000000000..9b35cecc1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_record_GenericDeserializer_1223705675_568621313.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1223705675_568621313
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionMapValueSchema0;
+
+    public Map_of_record_GenericDeserializer_1223705675_568621313(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionMapValueSchema0 = readerSchema.getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
+                        if ((reuse) instanceof Map) {
+                            unionOptionReuse0 = ((Map)(reuse));
+                        }
+                        if (unionOptionReuse0 != (null)) {
+                            unionOptionReuse0 .clear();
+                            unionOption0 = unionOptionReuse0;
+                        } else {
+                            unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            unionOption0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+                    } else {
+                        unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_record_GenericDeserializer_1677529043_1677529043.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_record_GenericDeserializer_1677529043_1677529043.java
new file mode 100644
index 000000000..29a6a0a9b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/Map_of_record_GenericDeserializer_1677529043_1677529043.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1677529043_1677529043
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema field0;
+
+    public Map_of_record_GenericDeserializer_1677529043_1677529043(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.field0 = mapMapValueSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
new file mode 100644
index 000000000..18dd68702
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField>
+{
+
+    private final Schema readerSchema;
+
+    public RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRecordWithLargeUnionField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField RecordWithLargeUnionField;
+        if ((reuse)!= null) {
+            RecordWithLargeUnionField = ((com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField)(reuse));
+        } else {
+            RecordWithLargeUnionField = new com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Utf8 charSequence0;
+            Object oldString0 = RecordWithLargeUnionField.get(0);
+            if (oldString0 instanceof Utf8) {
+                charSequence0 = (decoder).readString(((Utf8) oldString0));
+            } else {
+                charSequence0 = (decoder).readString(null);
+            }
+            RecordWithLargeUnionField.put(0, charSequence0);
+        } else {
+            if (unionIndex0 == 1) {
+                RecordWithLargeUnionField.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException(new StringBuilder().append("Found").append(" \"byt").append("es\", ").append("expec").append("ting ").append("[\"str").append("ing\",").append(" \"int").append("\"]").toString());
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+                }
+            }
+        }
+        return RecordWithLargeUnionField;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
new file mode 100644
index 000000000..e9572a549
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        return RemovedTypesTestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
new file mode 100644
index 000000000..425f936f1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
@@ -0,0 +1,406 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord3((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord4((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord5((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord6((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord7((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord8((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord9((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord10((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord11((RemovedTypesTestRecord), (customization), (decoder));
+        return RemovedTypesTestRecord;
+    }
+
+    private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipBytes();
+        long chunkLen0 = (decoder.readArrayStart());
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object removedBytesArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipBytes();
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.skipBytes();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedBytesUnion': "+ unionIndex0));
+            }
+        }
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    decoder.skipBytes();
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen2 = (decoder.readArrayStart());
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object removedBytesUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex1 == 1) {
+                        decoder.skipBytes();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedBytesUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex2 = (decoder.readIndex());
+                    if (unionIndex2 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex2 == 1) {
+                            decoder.skipBytes();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedBytesUnionMapValue': "+ unionIndex2));
+                        }
+                    }
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipFixed(1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex3 == 1) {
+                decoder.skipFixed(1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedFixedUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen4 = (decoder.readArrayStart());
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object removedFixedArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipFixed(1);
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    decoder.skipFixed(1);
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen6 = (decoder.readArrayStart());
+        while (chunkLen6 > 0) {
+            for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                Object removedFixedUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex4 = (decoder.readIndex());
+                if (unionIndex4 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex4 == 1) {
+                        decoder.skipFixed(1);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedFixedUnionArrayElem': "+ unionIndex4));
+                    }
+                }
+            }
+            chunkLen6 = (decoder.arrayNext());
+        }
+        long chunkLen7 = (decoder.readMapStart());
+        if (chunkLen7 > 0) {
+            do {
+                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    int unionIndex5 = (decoder.readIndex());
+                    if (unionIndex5 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex5 == 1) {
+                            decoder.skipFixed(1);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedFixedUnionMapValue': "+ unionIndex5));
+                        }
+                    }
+                }
+                chunkLen7 = (decoder.mapNext());
+            } while (chunkLen7 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.readEnum();
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.readEnum();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedEnumUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen8 = (decoder.readArrayStart());
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                decoder.readEnum();
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        long chunkLen9 = (decoder.readMapStart());
+        if (chunkLen9 > 0) {
+            do {
+                for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    decoder.readEnum();
+                }
+                chunkLen9 = (decoder.mapNext());
+            } while (chunkLen9 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen10 = (decoder.readArrayStart());
+        while (chunkLen10 > 0) {
+            for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                Object removedEnumUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex7 = (decoder.readIndex());
+                if (unionIndex7 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex7 == 1) {
+                        decoder.readEnum();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedEnumUnionArrayElem': "+ unionIndex7));
+                    }
+                }
+            }
+            chunkLen10 = (decoder.arrayNext());
+        }
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key5 = (decoder.readString(null));
+                    int unionIndex8 = (decoder.readIndex());
+                    if (unionIndex8 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex8 == 1) {
+                            decoder.readEnum();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedEnumUnionMapValue': "+ unionIndex8));
+                        }
+                    }
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializeRemovedSubRecord0(null, (decoder), (customization));
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex9 == 1) {
+                deserializeRemovedSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedSubRecordUnion': "+ unionIndex9));
+            }
+        }
+    }
+
+    public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen12 = (decoder.readArrayStart());
+        while (chunkLen12 > 0) {
+            for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                Object removedSubRecordArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder), (customization));
+            }
+            chunkLen12 = (decoder.arrayNext());
+        }
+        long chunkLen13 = (decoder.readArrayStart());
+        while (chunkLen13 > 0) {
+            for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                Object removedSubRecordUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex10 == 1) {
+                        deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder), (customization));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen13 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen14 = (decoder.readMapStart());
+        if (chunkLen14 > 0) {
+            do {
+                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                    Utf8 key6 = (decoder.readString(null));
+                    deserializeRemovedSubRecord0(null, (decoder), (customization));
+                }
+                chunkLen14 = (decoder.mapNext());
+            } while (chunkLen14 > 0);
+        }
+        long chunkLen15 = (decoder.readMapStart());
+        if (chunkLen15 > 0) {
+            do {
+                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                    Utf8 key7 = (decoder.readString(null));
+                    int unionIndex11 = (decoder.readIndex());
+                    if (unionIndex11 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex11 == 1) {
+                            deserializeRemovedSubRecord0(null, (decoder), (customization));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionMapValue': "+ unionIndex11));
+                        }
+                    }
+                }
+                chunkLen15 = (decoder.mapNext());
+            } while (chunkLen15 > 0);
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
new file mode 100644
index 000000000..fed5a4f5b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
@@ -0,0 +1,172 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest1_SpecificDeserializer_1718878379_595582209
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest1_SpecificDeserializer_1718878379_595582209(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSplitRecordTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1;
+        if ((reuse)!= null) {
+            SplitRecordTest1 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1)(reuse));
+        } else {
+            SplitRecordTest1 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1();
+        }
+        SplitRecordTest1 .put(0, deserializeFullRecord0(SplitRecordTest1 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest10((SplitRecordTest1), (customization), (decoder));
+        return SplitRecordTest1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FullRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        FullRecord.put(1, null);
+        return FullRecord;
+    }
+
+    private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest1 .put(1, deserializeFullRecord1(SplitRecordTest1 .get(1), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest1 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            record30 .clear();
+        } else {
+            record30 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord2(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest1 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+        FullRecord.put(0, null);
+        return FullRecord;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord2(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FullRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_FullRecord0((FullRecord), (customization), (decoder));
+        return FullRecord;
+    }
+
+    private void populate_FullRecord0(com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
new file mode 100644
index 000000000..08f4590a6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
@@ -0,0 +1,204 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FullRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringRecord;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest2_SpecificDeserializer_595582209_1718878379
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest2_SpecificDeserializer_595582209_1718878379(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest20((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSplitRecordTest20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2;
+        if ((reuse)!= null) {
+            SplitRecordTest2 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2)(reuse));
+        } else {
+            SplitRecordTest2 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2();
+        }
+        SplitRecordTest2 .put(0, deserializeStringRecord0(SplitRecordTest2 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest20((SplitRecordTest2), (customization), (decoder));
+        return SplitRecordTest2;
+    }
+
+    public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        StringRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((StringRecord)(reuse));
+        } else {
+            IntRecord = new StringRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = IntRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        populate_IntRecord0((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord0(StringRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest2 .put(1, deserializeIntRecord0(SplitRecordTest2 .get(1), (decoder), (customization)));
+        List<FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest2 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            record30 .clear();
+        } else {
+            record30 = new ArrayList<FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord0(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest2 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((com.linkedin.avro.fastserde.generated.avro.IntRecord)(reuse));
+        } else {
+            IntRecord = new com.linkedin.avro.fastserde.generated.avro.IntRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex2 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_IntRecord1((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex3 == 1) {
+                IntRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+    public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        FullRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((FullRecord)(reuse));
+        } else {
+            IntRecord = new FullRecord();
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = IntRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex4));
+            }
+        }
+        populate_IntRecord2((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord2(FullRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            IntRecord.put(1, null);
+        } else {
+            if (unionIndex5 == 1) {
+                IntRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/StringableRecord_SpecificDeserializer_842267318_842267318.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/StringableRecord_SpecificDeserializer_842267318_842267318.java
new file mode 100644
index 000000000..4e8bef5b3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/StringableRecord_SpecificDeserializer_842267318_842267318.java
@@ -0,0 +1,224 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroRuntimeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificDeserializer_842267318_842267318
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.StringableRecord>
+{
+
+    private final Schema readerSchema;
+
+    public StringableRecord_SpecificDeserializer_842267318_842267318(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        try {
+            return deserializeStringableRecord0((reuse), (decoder), (customization));
+        } catch (NumberFormatException e) {
+            throw new AvroRuntimeException(e);
+        } catch (MalformedURLException e) {
+            throw new AvroRuntimeException(e);
+        } catch (URISyntaxException e) {
+            throw new AvroRuntimeException(e);
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord;
+        if ((reuse)!= null) {
+            StringableRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableRecord)(reuse));
+        } else {
+            StringableRecord = new com.linkedin.avro.fastserde.generated.avro.StringableRecord();
+        }
+        BigInteger charSequence0 = new BigInteger((decoder.readString()));
+        StringableRecord.put(0, charSequence0);
+        populate_StringableRecord0((StringableRecord), (customization), (decoder));
+        populate_StringableRecord1((StringableRecord), (customization), (decoder));
+        populate_StringableRecord2((StringableRecord), (customization), (decoder));
+        populate_StringableRecord3((StringableRecord), (customization), (decoder));
+        populate_StringableRecord4((StringableRecord), (customization), (decoder));
+        return StringableRecord;
+    }
+
+    private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, URISyntaxException
+    {
+        BigDecimal charSequence1 = new BigDecimal((decoder.readString()));
+        StringableRecord.put(1, charSequence1);
+        URI charSequence2 = new URI((decoder.readString()));
+        StringableRecord.put(2, charSequence2);
+    }
+
+    private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        URL charSequence3 = new URL((decoder.readString()));
+        StringableRecord.put(3, charSequence3);
+        File charSequence4 = new File((decoder.readString()));
+        StringableRecord.put(4, charSequence4);
+    }
+
+    private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        List<URL> urlArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = StringableRecord.get(5);
+        if (oldArray0 instanceof List) {
+            urlArray0 = ((List) oldArray0);
+            urlArray0 .clear();
+        } else {
+            urlArray0 = new ArrayList<URL>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object urlArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    urlArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                URL charSequence5 = new URL((decoder.readString()));
+                urlArray0 .add(charSequence5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        StringableRecord.put(5, urlArray0);
+        Map<URL, BigInteger> urlMap0 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), ((int) chunkLen1)));
+            } else {
+                Map<URL, BigInteger> urlMapReuse0 = null;
+                Object oldMap0 = StringableRecord.get(6);
+                if (oldMap0 instanceof Map) {
+                    urlMapReuse0 = ((Map) oldMap0);
+                }
+                if (urlMapReuse0 != (null)) {
+                    urlMapReuse0 .clear();
+                    urlMap0 = urlMapReuse0;
+                } else {
+                    urlMap0 = new HashMap<URL, BigInteger>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    URL key0 = new URL((decoder.readString()));
+                    BigInteger charSequence6 = new BigInteger((decoder.readString()));
+                    urlMap0 .put(key0, charSequence6);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), 0));
+            } else {
+                urlMap0 = new HashMap<URL, BigInteger>(0);
+            }
+        }
+        StringableRecord.put(6, urlMap0);
+    }
+
+    private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        StringableRecord.put(7, deserializeStringableSubRecord0(StringableRecord.get(7), (decoder), (customization)));
+        StringableRecord.put(8, deserializeAnotherSubRecord0(StringableRecord.get(8), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord;
+        if ((reuse)!= null) {
+            StringableSubRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableSubRecord)(reuse));
+        } else {
+            StringableSubRecord = new com.linkedin.avro.fastserde.generated.avro.StringableSubRecord();
+        }
+        URI charSequence7 = new URI((decoder.readString()));
+        StringableSubRecord.put(0, charSequence7);
+        populate_StringableSubRecord0((StringableSubRecord), (customization), (decoder));
+        return StringableSubRecord;
+    }
+
+    private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, URISyntaxException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            StringableSubRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence8;
+                Object oldString0 = StringableSubRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                StringableSubRecord.put(1, charSequence8);
+            } else {
+                if (unionIndex0 == 2) {
+                    StringableSubRecord.put(1, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullStringIntUnion': "+ unionIndex0));
+                }
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord AnotherSubRecord;
+        if ((reuse)!= null) {
+            AnotherSubRecord = ((com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord)(reuse));
+        } else {
+            AnotherSubRecord = new com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord();
+        }
+        AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder), (customization)));
+        return AnotherSubRecord;
+    }
+
+    private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            StringableRecord.put(9, null);
+        } else {
+            if (unionIndex1 == 1) {
+                String charSequence9 = (decoder).readString();
+                StringableRecord.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'stringUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
new file mode 100644
index 000000000..be7f0242e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
@@ -0,0 +1,46 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class TestArrayOfFloats_GenericDeserializer_1408566797_1408566797
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema array_of_float0;
+
+    public TestArrayOfFloats_GenericDeserializer_1408566797_1408566797(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.array_of_float0 = readerSchema.getField("array_of_float").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestArrayOfFloats0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestArrayOfFloats;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestArrayOfFloats = ((IndexedRecord)(reuse));
+        } else {
+            TestArrayOfFloats = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveFloatList array_of_float1 = null;
+        array_of_float1 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestArrayOfFloats.get(0), (decoder)));
+        TestArrayOfFloats.put(0, array_of_float1);
+        return TestArrayOfFloats;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_GenericDeserializer_473555078_473555078.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_GenericDeserializer_473555078_473555078.java
new file mode 100644
index 000000000..6148a234a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_GenericDeserializer_473555078_473555078.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_GenericDeserializer_473555078_473555078
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema map_field0;
+
+    public TestRecord_GenericDeserializer_473555078_473555078(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.map_field0 = readerSchema.getField("map_field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestRecord = ((IndexedRecord)(reuse));
+        } else {
+            TestRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Utf8> map_field1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Utf8> map_fieldReuse0 = null;
+                Object oldMap0 = TestRecord.get(0);
+                if (oldMap0 instanceof Map) {
+                    map_fieldReuse0 = ((Map) oldMap0);
+                }
+                if (map_fieldReuse0 != (null)) {
+                    map_fieldReuse0 .clear();
+                    map_field1 = map_fieldReuse0;
+                } else {
+                    map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence0 = (decoder).readString(null);
+                    map_field1 .put(key0, charSequence0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), 0));
+            } else {
+                map_field1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        TestRecord.put(0, map_field1);
+        return TestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_1898726132_553331077.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_1898726132_553331077.java
new file mode 100644
index 000000000..9d61fbd11
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_1898726132_553331077.java
@@ -0,0 +1,1039 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1898726132_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1898726132_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_1991094399_553331077.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_1991094399_553331077.java
new file mode 100644
index 000000000..7b014013b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_1991094399_553331077.java
@@ -0,0 +1,1043 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1991094399_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1991094399_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(6);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        tempEnumMapping0 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(6);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        tempEnumMapping1 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(6);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        tempEnumMapping2 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(6);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        tempEnumMapping3 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_553331077_553331077.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_553331077_553331077.java
new file mode 100644
index 000000000..00c99b78b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/TestRecord_SpecificDeserializer_553331077_553331077.java
@@ -0,0 +1,1040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_553331077_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public TestRecord_SpecificDeserializer_553331077_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen16 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen16));
+        }
+        while (chunkLen16 > 0) {
+            for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen16 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_1971822364_1672473580.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_1971822364_1672473580.java
new file mode 100644
index 000000000..56a95f2a9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_1971822364_1672473580.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_1971822364_1672473580
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordRecordSchema0;
+
+    public UNION_GenericDeserializer_1971822364_1672473580(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordRecordSchema0 = readerSchema.getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordRecordSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(recordRecordSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_2018567528_1606337179.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_2018567528_1606337179.java
new file mode 100644
index 000000000..d1056f029
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_2018567528_1606337179.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_2018567528_1606337179
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArraySchema0;
+    private final Schema arrayArrayElemSchema0;
+
+    public UNION_GenericDeserializer_2018567528_1606337179(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArraySchema0 = readerSchema.getTypes().get(1);
+        this.arrayArrayElemSchema0 = arrayArraySchema0 .getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), arrayArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_568621313_1223705675.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_568621313_1223705675.java
new file mode 100644
index 000000000..bda1ae422
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UNION_GenericDeserializer_568621313_1223705675.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class UNION_GenericDeserializer_568621313_1223705675
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapSchema0;
+    private final Schema mapMapValueSchema0;
+
+    public UNION_GenericDeserializer_568621313_1223705675(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapSchema0 = readerSchema.getTypes().get(1);
+        this.mapMapValueSchema0 = mapMapSchema0 .getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
new file mode 100644
index 000000000..c4ccd5c18
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV1;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV2;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField>
+{
+
+    private final Schema readerSchema;
+
+    public UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeUnionOfRecordsWithSameNameEnumField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField UnionOfRecordsWithSameNameEnumField;
+        if ((reuse)!= null) {
+            UnionOfRecordsWithSameNameEnumField = ((com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField)(reuse));
+        } else {
+            UnionOfRecordsWithSameNameEnumField = new com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+        return UnionOfRecordsWithSameNameEnumField;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV1 MyRecordV1;
+        if ((reuse)!= null) {
+            MyRecordV1 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV1)(reuse));
+        } else {
+            MyRecordV1 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV1();
+        }
+        MyRecordV1 .put(0, Enums.getConstant(MyEnumV1 .class, (decoder.readEnum())));
+        return MyRecordV1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV2 MyRecordV2;
+        if ((reuse)!= null) {
+            MyRecordV2 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV2)(reuse));
+        } else {
+            MyRecordV2 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV2();
+        }
+        MyRecordV2 .put(0, Enums.getConstant(MyEnumV2 .class, (decoder.readEnum())));
+        return MyRecordV2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/recordName_GenericDeserializer_1743054079_1743054079.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/recordName_GenericDeserializer_1743054079_1743054079.java
new file mode 100644
index 000000000..f399229a4
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/recordName_GenericDeserializer_1743054079_1743054079.java
@@ -0,0 +1,67 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class recordName_GenericDeserializer_1743054079_1743054079
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionField0;
+
+    public recordName_GenericDeserializer_1743054079_1743054079(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionField0 = readerSchema.getField("unionField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecordName0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord recordName;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            recordName = ((IndexedRecord)(reuse));
+        } else {
+            recordName = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = recordName.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        recordName.put(0, charSequence0);
+        populate_recordName0((recordName), (customization), (decoder));
+        return recordName;
+    }
+
+    private void populate_recordName0(IndexedRecord recordName, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            recordName.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                recordName.put(1, deserializerecordName0(recordName.get(1), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1025741720_1557256887.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1025741720_1557256887.java
new file mode 100644
index 000000000..21597eb41
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1025741720_1557256887.java
@@ -0,0 +1,96 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1025741720_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1025741720_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex1 = (decoder.readIndex());
+                            if (unionIndex1 == 0) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                if (unionIndex1 == 1) {
+                                    someIntsOption0 .put(key0, (decoder.readInt()));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'someIntsOptionValue': "+ unionIndex1));
+                                }
+                            }
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1126840752_2099305627.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1126840752_2099305627.java
new file mode 100644
index 000000000..3837b697b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1126840752_2099305627.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1126840752_2099305627
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1126840752_2099305627(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            if (unionIndex0 == 1) {
+                throw new AvroTypeException("Found \"string\", expecting \"int\"");
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someField': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1191367445_653449771.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1191367445_653449771.java
new file mode 100644
index 000000000..f09bd5a9f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1191367445_653449771.java
@@ -0,0 +1,69 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1191367445_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1191367445_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        someIntsOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1373882843_1971822364.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1373882843_1971822364.java
new file mode 100644
index 000000000..ffe7cf745
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1373882843_1971822364.java
@@ -0,0 +1,45 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1373882843_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1373882843_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            throw new RuntimeException(("Illegal union index for 'someInt': "+ unionIndex0));
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1556659421_711533897.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1556659421_711533897.java
new file mode 100644
index 000000000..8db91532d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1556659421_711533897.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1556659421_711533897
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public record_GenericDeserializer_1556659421_711533897(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"subRecord\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"subRecord\",\"fields\":[{\"name\":\"someInt1\",\"type\":\"int\",\"doc\":\"\"},{\"name\":\"someInt2\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1557256887_1025741720.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1557256887_1025741720.java
new file mode 100644
index 000000000..d2903a2dd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1557256887_1025741720.java
@@ -0,0 +1,81 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_1025741720
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+    private final Schema someIntsMapValueSchema0;
+
+    public record_GenericDeserializer_1557256887_1025741720(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+        this.someIntsMapValueSchema0 = someIntsMapSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1557256887_753570467.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1557256887_753570467.java
new file mode 100644
index 000000000..0ea3e7414
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1557256887_753570467.java
@@ -0,0 +1,79 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_753570467
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+
+    public record_GenericDeserializer_1557256887_753570467(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1672473580_1971822364.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1672473580_1971822364.java
new file mode 100644
index 000000000..5e01ab095
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1672473580_1971822364.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1672473580_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1672473580_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                return deserializerecord0((reuse), (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1971822364_1373882843.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1971822364_1373882843.java
new file mode 100644
index 000000000..21da87113
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_1971822364_1373882843.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1971822364_1373882843
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInt0;
+
+    public record_GenericDeserializer_1971822364_1373882843(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInt0 = readerSchema.getField("someInt").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_653449771_1191367445.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_653449771_1191367445.java
new file mode 100644
index 000000000..69e13b06a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_653449771_1191367445.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_1191367445
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+
+    public record_GenericDeserializer_653449771_1191367445(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveIntList someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof PrimitiveIntList) {
+            someInts1 = ((PrimitiveIntList) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_653449771_813379571.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_653449771_813379571.java
new file mode 100644
index 000000000..c02082a05
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_653449771_813379571.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_813379571
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+    private final Schema someIntsArrayElemSchema0;
+
+    public record_GenericDeserializer_653449771_813379571(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+        this.someIntsArrayElemSchema0 = someIntsArraySchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof List) {
+            someInts1 = ((List) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new org.apache.avro.generic.GenericData.Array<Integer>(((int) chunkLen0), someIntsArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .add((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_711533897_1556659421.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_711533897_1556659421.java
new file mode 100644
index 000000000..4eee2efc7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_711533897_1556659421.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_711533897_1556659421
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+    private final Schema subRecordRecordSchema0;
+
+    public record_GenericDeserializer_711533897_1556659421(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordRecordSchema0 = subRecord0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordRecordSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordRecordSchema0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_753570467_1557256887.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_753570467_1557256887.java
new file mode 100644
index 000000000..836ce66a0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_753570467_1557256887.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_753570467_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_753570467_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            someIntsOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_813379571_653449771.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_813379571_653449771.java
new file mode 100644
index 000000000..eab33f3b0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/record_GenericDeserializer_813379571_653449771.java
@@ -0,0 +1,83 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_813379571_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_813379571_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object someIntsOptionArrayElementReuseVar0 = null;
+                        if (oldArray0 instanceof GenericArray) {
+                            someIntsOptionArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                        }
+                        int unionIndex1 = (decoder.readIndex());
+                        if (unionIndex1 == 0) {
+                            someIntsOption0 .addPrimitive((decoder.readInt()));
+                        } else {
+                            if (unionIndex1 == 1) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'someIntsOptionElem': "+ unionIndex1));
+                            }
+                        }
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/testRecord_GenericDeserializer_1146484089_1256982207.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/testRecord_GenericDeserializer_1146484089_1256982207.java
new file mode 100644
index 000000000..8a19a5073
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_7/testRecord_GenericDeserializer_1146484089_1256982207.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class testRecord_GenericDeserializer_1146484089_1256982207
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+
+    public testRecord_GenericDeserializer_1146484089_1256982207(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.testEnum: No match for C"));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializetestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord testRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            testRecord = ((IndexedRecord)(reuse));
+        } else {
+            testRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        testRecord.put(0, enumValue0);
+        return testRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_BOOLEAN_GenericSerializer_869749973.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_BOOLEAN_GenericSerializer_869749973.java
new file mode 100644
index 000000000..c7a0e4503
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_BOOLEAN_GenericSerializer_869749973.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_BOOLEAN_GenericSerializer_869749973
+    implements FastSerializer<List<Boolean>>
+{
+
+
+    public void serialize(List<Boolean> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveBooleanList) {
+                PrimitiveBooleanList primitiveList0 = ((PrimitiveBooleanList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_DOUBLE_GenericSerializer_18760307.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_DOUBLE_GenericSerializer_18760307.java
new file mode 100644
index 000000000..3f29da87e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_DOUBLE_GenericSerializer_18760307.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_DOUBLE_GenericSerializer_18760307
+    implements FastSerializer<List<Double>>
+{
+
+
+    public void serialize(List<Double> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveDoubleList) {
+                PrimitiveDoubleList primitiveList0 = ((PrimitiveDoubleList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_FLOAT_GenericSerializer_1012670397.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_FLOAT_GenericSerializer_1012670397.java
new file mode 100644
index 000000000..665b4ff62
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_FLOAT_GenericSerializer_1012670397.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_FLOAT_GenericSerializer_1012670397
+    implements FastSerializer<List<Float>>
+{
+
+
+    public void serialize(List<Float> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_INT_GenericSerializer_1012089072.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_INT_GenericSerializer_1012089072.java
new file mode 100644
index 000000000..58ced1b62
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_INT_GenericSerializer_1012089072.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_INT_GenericSerializer_1012089072
+    implements FastSerializer<List<Integer>>
+{
+
+
+    public void serialize(List<Integer> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_LONG_GenericSerializer_325099267.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_LONG_GenericSerializer_325099267.java
new file mode 100644
index 000000000..e63970238
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_LONG_GenericSerializer_325099267.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_LONG_GenericSerializer_325099267
+    implements FastSerializer<List<Long>>
+{
+
+
+    public void serialize(List<Long> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveLongList) {
+                PrimitiveLongList primitiveList0 = ((PrimitiveLongList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_UNION_GenericSerializer_777827233.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_UNION_GenericSerializer_777827233.java
new file mode 100644
index 000000000..0c5c001f7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_UNION_GenericSerializer_777827233.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericSerializer_777827233
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord union0 = null;
+                union0 = ((List<IndexedRecord> ) data).get(counter0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_record_GenericSerializer_477614132.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_record_GenericSerializer_477614132.java
new file mode 100644
index 000000000..52e447454
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Array_of_record_GenericSerializer_477614132.java
@@ -0,0 +1,53 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericSerializer_477614132
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord record0 = null;
+                record0 = ((List<IndexedRecord> ) data).get(counter0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
new file mode 100644
index 000000000..7ef4c8cfd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
@@ -0,0 +1,4527 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        (encoder).writeInt(((Integer) data.get(2)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(3)));
+        (encoder).writeInt(((Integer) data.get(4)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(5)));
+        (encoder).writeInt(((Integer) data.get(6)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(7)));
+        (encoder).writeInt(((Integer) data.get(8)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(9)));
+        (encoder).writeInt(((Integer) data.get(10)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(11)));
+        (encoder).writeInt(((Integer) data.get(12)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(13)));
+        (encoder).writeInt(((Integer) data.get(14)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(15)));
+        (encoder).writeInt(((Integer) data.get(16)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(17)));
+        (encoder).writeInt(((Integer) data.get(18)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(19)));
+        (encoder).writeInt(((Integer) data.get(20)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(21)));
+        (encoder).writeInt(((Integer) data.get(22)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(23)));
+        (encoder).writeInt(((Integer) data.get(24)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(25)));
+        (encoder).writeInt(((Integer) data.get(26)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(27)));
+        (encoder).writeInt(((Integer) data.get(28)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(29)));
+        (encoder).writeInt(((Integer) data.get(30)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(31)));
+        (encoder).writeInt(((Integer) data.get(32)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(33)));
+        (encoder).writeInt(((Integer) data.get(34)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(35)));
+        (encoder).writeInt(((Integer) data.get(36)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(37)));
+        (encoder).writeInt(((Integer) data.get(38)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(39)));
+        (encoder).writeInt(((Integer) data.get(40)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(41)));
+        (encoder).writeInt(((Integer) data.get(42)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(43)));
+        (encoder).writeInt(((Integer) data.get(44)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(45)));
+        (encoder).writeInt(((Integer) data.get(46)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(47)));
+        (encoder).writeInt(((Integer) data.get(48)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(49)));
+        (encoder).writeInt(((Integer) data.get(50)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(51)));
+        (encoder).writeInt(((Integer) data.get(52)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(53)));
+        (encoder).writeInt(((Integer) data.get(54)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(55)));
+        (encoder).writeInt(((Integer) data.get(56)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(57)));
+        (encoder).writeInt(((Integer) data.get(58)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(59)));
+        (encoder).writeInt(((Integer) data.get(60)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(61)));
+        (encoder).writeInt(((Integer) data.get(62)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(63)));
+        (encoder).writeInt(((Integer) data.get(64)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(65)));
+        (encoder).writeInt(((Integer) data.get(66)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(67)));
+        (encoder).writeInt(((Integer) data.get(68)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(69)));
+        (encoder).writeInt(((Integer) data.get(70)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(71)));
+        (encoder).writeInt(((Integer) data.get(72)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(73)));
+        (encoder).writeInt(((Integer) data.get(74)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(75)));
+        (encoder).writeInt(((Integer) data.get(76)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(77)));
+        (encoder).writeInt(((Integer) data.get(78)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(79)));
+        (encoder).writeInt(((Integer) data.get(80)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(81)));
+        (encoder).writeInt(((Integer) data.get(82)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(83)));
+        (encoder).writeInt(((Integer) data.get(84)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(85)));
+        (encoder).writeInt(((Integer) data.get(86)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(87)));
+        (encoder).writeInt(((Integer) data.get(88)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(89)));
+        (encoder).writeInt(((Integer) data.get(90)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(91)));
+        (encoder).writeInt(((Integer) data.get(92)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(93)));
+        (encoder).writeInt(((Integer) data.get(94)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(95)));
+        (encoder).writeInt(((Integer) data.get(96)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(97)));
+        (encoder).writeInt(((Integer) data.get(98)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(99)));
+        (encoder).writeInt(((Integer) data.get(100)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(101)));
+        (encoder).writeInt(((Integer) data.get(102)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(103)));
+        (encoder).writeInt(((Integer) data.get(104)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(105)));
+        (encoder).writeInt(((Integer) data.get(106)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(107)));
+        (encoder).writeInt(((Integer) data.get(108)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(109)));
+        (encoder).writeInt(((Integer) data.get(110)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(111)));
+        (encoder).writeInt(((Integer) data.get(112)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(113)));
+        (encoder).writeInt(((Integer) data.get(114)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(115)));
+        (encoder).writeInt(((Integer) data.get(116)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(117)));
+        (encoder).writeInt(((Integer) data.get(118)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(119)));
+        (encoder).writeInt(((Integer) data.get(120)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(121)));
+        (encoder).writeInt(((Integer) data.get(122)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(123)));
+        (encoder).writeInt(((Integer) data.get(124)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(125)));
+        (encoder).writeInt(((Integer) data.get(126)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(127)));
+        (encoder).writeInt(((Integer) data.get(128)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(129)));
+        (encoder).writeInt(((Integer) data.get(130)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(131)));
+        (encoder).writeInt(((Integer) data.get(132)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(133)));
+        (encoder).writeInt(((Integer) data.get(134)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(135)));
+        (encoder).writeInt(((Integer) data.get(136)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(137)));
+        (encoder).writeInt(((Integer) data.get(138)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(139)));
+        (encoder).writeInt(((Integer) data.get(140)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(141)));
+        (encoder).writeInt(((Integer) data.get(142)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(143)));
+        (encoder).writeInt(((Integer) data.get(144)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(145)));
+        (encoder).writeInt(((Integer) data.get(146)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(147)));
+        (encoder).writeInt(((Integer) data.get(148)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(149)));
+        (encoder).writeInt(((Integer) data.get(150)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(151)));
+        (encoder).writeInt(((Integer) data.get(152)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(153)));
+        (encoder).writeInt(((Integer) data.get(154)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(155)));
+        (encoder).writeInt(((Integer) data.get(156)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(157)));
+        (encoder).writeInt(((Integer) data.get(158)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(159)));
+        (encoder).writeInt(((Integer) data.get(160)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(161)));
+        (encoder).writeInt(((Integer) data.get(162)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(163)));
+        (encoder).writeInt(((Integer) data.get(164)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(165)));
+        (encoder).writeInt(((Integer) data.get(166)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(167)));
+        (encoder).writeInt(((Integer) data.get(168)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(169)));
+        (encoder).writeInt(((Integer) data.get(170)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(171)));
+        (encoder).writeInt(((Integer) data.get(172)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(173)));
+        (encoder).writeInt(((Integer) data.get(174)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(175)));
+        (encoder).writeInt(((Integer) data.get(176)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(177)));
+        (encoder).writeInt(((Integer) data.get(178)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(179)));
+        (encoder).writeInt(((Integer) data.get(180)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(181)));
+        (encoder).writeInt(((Integer) data.get(182)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(183)));
+        (encoder).writeInt(((Integer) data.get(184)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(185)));
+        (encoder).writeInt(((Integer) data.get(186)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(187)));
+        (encoder).writeInt(((Integer) data.get(188)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(189)));
+        (encoder).writeInt(((Integer) data.get(190)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(191)));
+        (encoder).writeInt(((Integer) data.get(192)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(193)));
+        (encoder).writeInt(((Integer) data.get(194)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(195)));
+        (encoder).writeInt(((Integer) data.get(196)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(197)));
+        (encoder).writeInt(((Integer) data.get(198)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(199)));
+        (encoder).writeInt(((Integer) data.get(200)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(201)));
+        (encoder).writeInt(((Integer) data.get(202)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(203)));
+        (encoder).writeInt(((Integer) data.get(204)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(205)));
+        (encoder).writeInt(((Integer) data.get(206)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(207)));
+        (encoder).writeInt(((Integer) data.get(208)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(209)));
+        (encoder).writeInt(((Integer) data.get(210)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(211)));
+        (encoder).writeInt(((Integer) data.get(212)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(213)));
+        (encoder).writeInt(((Integer) data.get(214)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(215)));
+        (encoder).writeInt(((Integer) data.get(216)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(217)));
+        (encoder).writeInt(((Integer) data.get(218)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(219)));
+        (encoder).writeInt(((Integer) data.get(220)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(221)));
+        (encoder).writeInt(((Integer) data.get(222)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(223)));
+        (encoder).writeInt(((Integer) data.get(224)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(225)));
+        (encoder).writeInt(((Integer) data.get(226)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(227)));
+        (encoder).writeInt(((Integer) data.get(228)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(229)));
+        (encoder).writeInt(((Integer) data.get(230)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(231)));
+        (encoder).writeInt(((Integer) data.get(232)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(233)));
+        (encoder).writeInt(((Integer) data.get(234)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(235)));
+        (encoder).writeInt(((Integer) data.get(236)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(237)));
+        (encoder).writeInt(((Integer) data.get(238)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(239)));
+        (encoder).writeInt(((Integer) data.get(240)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(241)));
+        (encoder).writeInt(((Integer) data.get(242)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(243)));
+        (encoder).writeInt(((Integer) data.get(244)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(245)));
+        (encoder).writeInt(((Integer) data.get(246)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(247)));
+        (encoder).writeInt(((Integer) data.get(248)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(249)));
+        (encoder).writeInt(((Integer) data.get(250)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(251)));
+        (encoder).writeInt(((Integer) data.get(252)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(253)));
+        (encoder).writeInt(((Integer) data.get(254)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(255)));
+        (encoder).writeInt(((Integer) data.get(256)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(257)));
+        (encoder).writeInt(((Integer) data.get(258)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(259)));
+        (encoder).writeInt(((Integer) data.get(260)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(261)));
+        (encoder).writeInt(((Integer) data.get(262)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(263)));
+        (encoder).writeInt(((Integer) data.get(264)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(265)));
+        (encoder).writeInt(((Integer) data.get(266)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(267)));
+        (encoder).writeInt(((Integer) data.get(268)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(269)));
+        (encoder).writeInt(((Integer) data.get(270)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(271)));
+        (encoder).writeInt(((Integer) data.get(272)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(273)));
+        (encoder).writeInt(((Integer) data.get(274)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(275)));
+        (encoder).writeInt(((Integer) data.get(276)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(277)));
+        (encoder).writeInt(((Integer) data.get(278)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(279)));
+        (encoder).writeInt(((Integer) data.get(280)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(281)));
+        (encoder).writeInt(((Integer) data.get(282)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(283)));
+        (encoder).writeInt(((Integer) data.get(284)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(285)));
+        (encoder).writeInt(((Integer) data.get(286)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(287)));
+        (encoder).writeInt(((Integer) data.get(288)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(289)));
+        (encoder).writeInt(((Integer) data.get(290)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(291)));
+        (encoder).writeInt(((Integer) data.get(292)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(293)));
+        (encoder).writeInt(((Integer) data.get(294)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(295)));
+        (encoder).writeInt(((Integer) data.get(296)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(297)));
+        (encoder).writeInt(((Integer) data.get(298)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(299)));
+        (encoder).writeInt(((Integer) data.get(300)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(301)));
+        (encoder).writeInt(((Integer) data.get(302)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(303)));
+        (encoder).writeInt(((Integer) data.get(304)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(305)));
+        (encoder).writeInt(((Integer) data.get(306)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(307)));
+        (encoder).writeInt(((Integer) data.get(308)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(309)));
+        (encoder).writeInt(((Integer) data.get(310)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(311)));
+        (encoder).writeInt(((Integer) data.get(312)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(313)));
+        (encoder).writeInt(((Integer) data.get(314)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(315)));
+        (encoder).writeInt(((Integer) data.get(316)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(317)));
+        (encoder).writeInt(((Integer) data.get(318)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(319)));
+        (encoder).writeInt(((Integer) data.get(320)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(321)));
+        (encoder).writeInt(((Integer) data.get(322)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(323)));
+        (encoder).writeInt(((Integer) data.get(324)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(325)));
+        (encoder).writeInt(((Integer) data.get(326)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(327)));
+        (encoder).writeInt(((Integer) data.get(328)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(329)));
+        (encoder).writeInt(((Integer) data.get(330)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(331)));
+        (encoder).writeInt(((Integer) data.get(332)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(333)));
+        (encoder).writeInt(((Integer) data.get(334)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(335)));
+        (encoder).writeInt(((Integer) data.get(336)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(337)));
+        (encoder).writeInt(((Integer) data.get(338)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(339)));
+        (encoder).writeInt(((Integer) data.get(340)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(341)));
+        (encoder).writeInt(((Integer) data.get(342)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(343)));
+        (encoder).writeInt(((Integer) data.get(344)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(345)));
+        (encoder).writeInt(((Integer) data.get(346)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(347)));
+        (encoder).writeInt(((Integer) data.get(348)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(349)));
+        (encoder).writeInt(((Integer) data.get(350)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(351)));
+        (encoder).writeInt(((Integer) data.get(352)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(353)));
+        (encoder).writeInt(((Integer) data.get(354)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(355)));
+        (encoder).writeInt(((Integer) data.get(356)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(357)));
+        (encoder).writeInt(((Integer) data.get(358)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(359)));
+        (encoder).writeInt(((Integer) data.get(360)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(361)));
+        (encoder).writeInt(((Integer) data.get(362)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(363)));
+        (encoder).writeInt(((Integer) data.get(364)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(365)));
+        (encoder).writeInt(((Integer) data.get(366)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(367)));
+        (encoder).writeInt(((Integer) data.get(368)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(369)));
+        (encoder).writeInt(((Integer) data.get(370)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(371)));
+        (encoder).writeInt(((Integer) data.get(372)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(373)));
+        (encoder).writeInt(((Integer) data.get(374)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(375)));
+        (encoder).writeInt(((Integer) data.get(376)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(377)));
+        (encoder).writeInt(((Integer) data.get(378)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(379)));
+        (encoder).writeInt(((Integer) data.get(380)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(381)));
+        (encoder).writeInt(((Integer) data.get(382)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(383)));
+        (encoder).writeInt(((Integer) data.get(384)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(385)));
+        (encoder).writeInt(((Integer) data.get(386)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(387)));
+        (encoder).writeInt(((Integer) data.get(388)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(389)));
+        (encoder).writeInt(((Integer) data.get(390)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(391)));
+        (encoder).writeInt(((Integer) data.get(392)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(393)));
+        (encoder).writeInt(((Integer) data.get(394)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(395)));
+        (encoder).writeInt(((Integer) data.get(396)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(397)));
+        (encoder).writeInt(((Integer) data.get(398)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(399)));
+        (encoder).writeInt(((Integer) data.get(400)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(401)));
+        (encoder).writeInt(((Integer) data.get(402)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(403)));
+        (encoder).writeInt(((Integer) data.get(404)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(405)));
+        (encoder).writeInt(((Integer) data.get(406)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(407)));
+        (encoder).writeInt(((Integer) data.get(408)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(409)));
+        (encoder).writeInt(((Integer) data.get(410)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(411)));
+        (encoder).writeInt(((Integer) data.get(412)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(413)));
+        (encoder).writeInt(((Integer) data.get(414)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(415)));
+        (encoder).writeInt(((Integer) data.get(416)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(417)));
+        (encoder).writeInt(((Integer) data.get(418)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(419)));
+        (encoder).writeInt(((Integer) data.get(420)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(421)));
+        (encoder).writeInt(((Integer) data.get(422)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(423)));
+        (encoder).writeInt(((Integer) data.get(424)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(425)));
+        (encoder).writeInt(((Integer) data.get(426)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(427)));
+        (encoder).writeInt(((Integer) data.get(428)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(429)));
+        (encoder).writeInt(((Integer) data.get(430)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(431)));
+        (encoder).writeInt(((Integer) data.get(432)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(433)));
+        (encoder).writeInt(((Integer) data.get(434)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(435)));
+        (encoder).writeInt(((Integer) data.get(436)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(437)));
+        (encoder).writeInt(((Integer) data.get(438)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(439)));
+        (encoder).writeInt(((Integer) data.get(440)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(441)));
+        (encoder).writeInt(((Integer) data.get(442)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(443)));
+        (encoder).writeInt(((Integer) data.get(444)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(445)));
+        (encoder).writeInt(((Integer) data.get(446)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(447)));
+        (encoder).writeInt(((Integer) data.get(448)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(449)));
+        (encoder).writeInt(((Integer) data.get(450)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(451)));
+        (encoder).writeInt(((Integer) data.get(452)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(453)));
+        (encoder).writeInt(((Integer) data.get(454)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(455)));
+        (encoder).writeInt(((Integer) data.get(456)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(457)));
+        (encoder).writeInt(((Integer) data.get(458)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(459)));
+        (encoder).writeInt(((Integer) data.get(460)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(461)));
+        (encoder).writeInt(((Integer) data.get(462)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(463)));
+        (encoder).writeInt(((Integer) data.get(464)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(465)));
+        (encoder).writeInt(((Integer) data.get(466)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(467)));
+        (encoder).writeInt(((Integer) data.get(468)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(469)));
+        (encoder).writeInt(((Integer) data.get(470)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(471)));
+        (encoder).writeInt(((Integer) data.get(472)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(473)));
+        (encoder).writeInt(((Integer) data.get(474)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(475)));
+        (encoder).writeInt(((Integer) data.get(476)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(477)));
+        (encoder).writeInt(((Integer) data.get(478)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(479)));
+        (encoder).writeInt(((Integer) data.get(480)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(481)));
+        (encoder).writeInt(((Integer) data.get(482)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(483)));
+        (encoder).writeInt(((Integer) data.get(484)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(485)));
+        (encoder).writeInt(((Integer) data.get(486)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(487)));
+        (encoder).writeInt(((Integer) data.get(488)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(489)));
+        (encoder).writeInt(((Integer) data.get(490)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(491)));
+        (encoder).writeInt(((Integer) data.get(492)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(493)));
+        (encoder).writeInt(((Integer) data.get(494)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(495)));
+        (encoder).writeInt(((Integer) data.get(496)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(497)));
+        (encoder).writeInt(((Integer) data.get(498)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(499)));
+        (encoder).writeInt(((Integer) data.get(500)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(501)));
+        (encoder).writeInt(((Integer) data.get(502)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(503)));
+        (encoder).writeInt(((Integer) data.get(504)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(505)));
+        (encoder).writeInt(((Integer) data.get(506)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(507)));
+        (encoder).writeInt(((Integer) data.get(508)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(509)));
+        (encoder).writeInt(((Integer) data.get(510)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(511)));
+        (encoder).writeInt(((Integer) data.get(512)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(513)));
+        (encoder).writeInt(((Integer) data.get(514)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(515)));
+        (encoder).writeInt(((Integer) data.get(516)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(517)));
+        (encoder).writeInt(((Integer) data.get(518)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(519)));
+        (encoder).writeInt(((Integer) data.get(520)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(521)));
+        (encoder).writeInt(((Integer) data.get(522)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(523)));
+        (encoder).writeInt(((Integer) data.get(524)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(525)));
+        (encoder).writeInt(((Integer) data.get(526)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(527)));
+        (encoder).writeInt(((Integer) data.get(528)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(529)));
+        (encoder).writeInt(((Integer) data.get(530)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(531)));
+        (encoder).writeInt(((Integer) data.get(532)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(533)));
+        (encoder).writeInt(((Integer) data.get(534)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(535)));
+        (encoder).writeInt(((Integer) data.get(536)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(537)));
+        (encoder).writeInt(((Integer) data.get(538)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(539)));
+        (encoder).writeInt(((Integer) data.get(540)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(541)));
+        (encoder).writeInt(((Integer) data.get(542)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(543)));
+        (encoder).writeInt(((Integer) data.get(544)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(545)));
+        (encoder).writeInt(((Integer) data.get(546)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(547)));
+        (encoder).writeInt(((Integer) data.get(548)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(549)));
+        (encoder).writeInt(((Integer) data.get(550)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(551)));
+        (encoder).writeInt(((Integer) data.get(552)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(553)));
+        (encoder).writeInt(((Integer) data.get(554)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(555)));
+        (encoder).writeInt(((Integer) data.get(556)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(557)));
+        (encoder).writeInt(((Integer) data.get(558)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(559)));
+        (encoder).writeInt(((Integer) data.get(560)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(561)));
+        (encoder).writeInt(((Integer) data.get(562)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(563)));
+        (encoder).writeInt(((Integer) data.get(564)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(565)));
+        (encoder).writeInt(((Integer) data.get(566)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(567)));
+        (encoder).writeInt(((Integer) data.get(568)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(569)));
+        (encoder).writeInt(((Integer) data.get(570)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(571)));
+        (encoder).writeInt(((Integer) data.get(572)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(573)));
+        (encoder).writeInt(((Integer) data.get(574)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(575)));
+        (encoder).writeInt(((Integer) data.get(576)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(577)));
+        (encoder).writeInt(((Integer) data.get(578)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(579)));
+        (encoder).writeInt(((Integer) data.get(580)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(581)));
+        (encoder).writeInt(((Integer) data.get(582)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(583)));
+        (encoder).writeInt(((Integer) data.get(584)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(585)));
+        (encoder).writeInt(((Integer) data.get(586)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(587)));
+        (encoder).writeInt(((Integer) data.get(588)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(589)));
+        (encoder).writeInt(((Integer) data.get(590)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(591)));
+        (encoder).writeInt(((Integer) data.get(592)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(593)));
+        (encoder).writeInt(((Integer) data.get(594)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(595)));
+        (encoder).writeInt(((Integer) data.get(596)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(597)));
+        (encoder).writeInt(((Integer) data.get(598)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(599)));
+        (encoder).writeInt(((Integer) data.get(600)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(601)));
+        (encoder).writeInt(((Integer) data.get(602)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(603)));
+        (encoder).writeInt(((Integer) data.get(604)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(605)));
+        (encoder).writeInt(((Integer) data.get(606)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(607)));
+        (encoder).writeInt(((Integer) data.get(608)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(609)));
+        (encoder).writeInt(((Integer) data.get(610)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(611)));
+        (encoder).writeInt(((Integer) data.get(612)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(613)));
+        (encoder).writeInt(((Integer) data.get(614)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(615)));
+        (encoder).writeInt(((Integer) data.get(616)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(617)));
+        (encoder).writeInt(((Integer) data.get(618)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(619)));
+        (encoder).writeInt(((Integer) data.get(620)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(621)));
+        (encoder).writeInt(((Integer) data.get(622)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(623)));
+        (encoder).writeInt(((Integer) data.get(624)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(625)));
+        (encoder).writeInt(((Integer) data.get(626)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(627)));
+        (encoder).writeInt(((Integer) data.get(628)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(629)));
+        (encoder).writeInt(((Integer) data.get(630)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(631)));
+        (encoder).writeInt(((Integer) data.get(632)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(633)));
+        (encoder).writeInt(((Integer) data.get(634)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(635)));
+        (encoder).writeInt(((Integer) data.get(636)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(637)));
+        (encoder).writeInt(((Integer) data.get(638)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(639)));
+        (encoder).writeInt(((Integer) data.get(640)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(641)));
+        (encoder).writeInt(((Integer) data.get(642)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(643)));
+        (encoder).writeInt(((Integer) data.get(644)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(645)));
+        (encoder).writeInt(((Integer) data.get(646)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(647)));
+        (encoder).writeInt(((Integer) data.get(648)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(649)));
+        (encoder).writeInt(((Integer) data.get(650)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(651)));
+        (encoder).writeInt(((Integer) data.get(652)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(653)));
+        (encoder).writeInt(((Integer) data.get(654)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(655)));
+        (encoder).writeInt(((Integer) data.get(656)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(657)));
+        (encoder).writeInt(((Integer) data.get(658)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(659)));
+        (encoder).writeInt(((Integer) data.get(660)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(661)));
+        (encoder).writeInt(((Integer) data.get(662)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(663)));
+        (encoder).writeInt(((Integer) data.get(664)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(665)));
+        (encoder).writeInt(((Integer) data.get(666)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(667)));
+        (encoder).writeInt(((Integer) data.get(668)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(669)));
+        (encoder).writeInt(((Integer) data.get(670)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(671)));
+        (encoder).writeInt(((Integer) data.get(672)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(673)));
+        (encoder).writeInt(((Integer) data.get(674)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(675)));
+        (encoder).writeInt(((Integer) data.get(676)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(677)));
+        (encoder).writeInt(((Integer) data.get(678)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(679)));
+        (encoder).writeInt(((Integer) data.get(680)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(681)));
+        (encoder).writeInt(((Integer) data.get(682)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(683)));
+        (encoder).writeInt(((Integer) data.get(684)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(685)));
+        (encoder).writeInt(((Integer) data.get(686)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(687)));
+        (encoder).writeInt(((Integer) data.get(688)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(689)));
+        (encoder).writeInt(((Integer) data.get(690)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(691)));
+        (encoder).writeInt(((Integer) data.get(692)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(693)));
+        (encoder).writeInt(((Integer) data.get(694)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(695)));
+        (encoder).writeInt(((Integer) data.get(696)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(697)));
+        (encoder).writeInt(((Integer) data.get(698)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(699)));
+        (encoder).writeInt(((Integer) data.get(700)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(701)));
+        (encoder).writeInt(((Integer) data.get(702)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(703)));
+        (encoder).writeInt(((Integer) data.get(704)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(705)));
+        (encoder).writeInt(((Integer) data.get(706)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(707)));
+        (encoder).writeInt(((Integer) data.get(708)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(709)));
+        (encoder).writeInt(((Integer) data.get(710)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(711)));
+        (encoder).writeInt(((Integer) data.get(712)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(713)));
+        (encoder).writeInt(((Integer) data.get(714)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(715)));
+        (encoder).writeInt(((Integer) data.get(716)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(717)));
+        (encoder).writeInt(((Integer) data.get(718)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(719)));
+        (encoder).writeInt(((Integer) data.get(720)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(721)));
+        (encoder).writeInt(((Integer) data.get(722)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(723)));
+        (encoder).writeInt(((Integer) data.get(724)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(725)));
+        (encoder).writeInt(((Integer) data.get(726)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(727)));
+        (encoder).writeInt(((Integer) data.get(728)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(729)));
+        (encoder).writeInt(((Integer) data.get(730)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(731)));
+        (encoder).writeInt(((Integer) data.get(732)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(733)));
+        (encoder).writeInt(((Integer) data.get(734)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(735)));
+        (encoder).writeInt(((Integer) data.get(736)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(737)));
+        (encoder).writeInt(((Integer) data.get(738)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(739)));
+        (encoder).writeInt(((Integer) data.get(740)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(741)));
+        (encoder).writeInt(((Integer) data.get(742)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(743)));
+        (encoder).writeInt(((Integer) data.get(744)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(745)));
+        (encoder).writeInt(((Integer) data.get(746)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(747)));
+        (encoder).writeInt(((Integer) data.get(748)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(749)));
+        (encoder).writeInt(((Integer) data.get(750)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(751)));
+        (encoder).writeInt(((Integer) data.get(752)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(753)));
+        (encoder).writeInt(((Integer) data.get(754)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(755)));
+        (encoder).writeInt(((Integer) data.get(756)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(757)));
+        (encoder).writeInt(((Integer) data.get(758)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(759)));
+        (encoder).writeInt(((Integer) data.get(760)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(761)));
+        (encoder).writeInt(((Integer) data.get(762)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(763)));
+        (encoder).writeInt(((Integer) data.get(764)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(765)));
+        (encoder).writeInt(((Integer) data.get(766)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(767)));
+        (encoder).writeInt(((Integer) data.get(768)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(769)));
+        (encoder).writeInt(((Integer) data.get(770)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(771)));
+        (encoder).writeInt(((Integer) data.get(772)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(773)));
+        (encoder).writeInt(((Integer) data.get(774)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(775)));
+        (encoder).writeInt(((Integer) data.get(776)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(777)));
+        (encoder).writeInt(((Integer) data.get(778)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(779)));
+        (encoder).writeInt(((Integer) data.get(780)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(781)));
+        (encoder).writeInt(((Integer) data.get(782)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(783)));
+        (encoder).writeInt(((Integer) data.get(784)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(785)));
+        (encoder).writeInt(((Integer) data.get(786)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(787)));
+        (encoder).writeInt(((Integer) data.get(788)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(789)));
+        (encoder).writeInt(((Integer) data.get(790)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(791)));
+        (encoder).writeInt(((Integer) data.get(792)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(793)));
+        (encoder).writeInt(((Integer) data.get(794)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(795)));
+        (encoder).writeInt(((Integer) data.get(796)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(797)));
+        (encoder).writeInt(((Integer) data.get(798)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(799)));
+        (encoder).writeInt(((Integer) data.get(800)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(801)));
+        (encoder).writeInt(((Integer) data.get(802)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(803)));
+        (encoder).writeInt(((Integer) data.get(804)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(805)));
+        (encoder).writeInt(((Integer) data.get(806)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(807)));
+        (encoder).writeInt(((Integer) data.get(808)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(809)));
+        (encoder).writeInt(((Integer) data.get(810)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(811)));
+        (encoder).writeInt(((Integer) data.get(812)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(813)));
+        (encoder).writeInt(((Integer) data.get(814)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(815)));
+        (encoder).writeInt(((Integer) data.get(816)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(817)));
+        (encoder).writeInt(((Integer) data.get(818)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(819)));
+        (encoder).writeInt(((Integer) data.get(820)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(821)));
+        (encoder).writeInt(((Integer) data.get(822)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(823)));
+        (encoder).writeInt(((Integer) data.get(824)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(825)));
+        (encoder).writeInt(((Integer) data.get(826)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(827)));
+        (encoder).writeInt(((Integer) data.get(828)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(829)));
+        (encoder).writeInt(((Integer) data.get(830)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(831)));
+        (encoder).writeInt(((Integer) data.get(832)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(833)));
+        (encoder).writeInt(((Integer) data.get(834)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(835)));
+        (encoder).writeInt(((Integer) data.get(836)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(837)));
+        (encoder).writeInt(((Integer) data.get(838)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(839)));
+        (encoder).writeInt(((Integer) data.get(840)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(841)));
+        (encoder).writeInt(((Integer) data.get(842)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(843)));
+        (encoder).writeInt(((Integer) data.get(844)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(845)));
+        (encoder).writeInt(((Integer) data.get(846)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(847)));
+        (encoder).writeInt(((Integer) data.get(848)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(849)));
+        (encoder).writeInt(((Integer) data.get(850)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(851)));
+        (encoder).writeInt(((Integer) data.get(852)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(853)));
+        (encoder).writeInt(((Integer) data.get(854)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(855)));
+        (encoder).writeInt(((Integer) data.get(856)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(857)));
+        (encoder).writeInt(((Integer) data.get(858)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(859)));
+        (encoder).writeInt(((Integer) data.get(860)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(861)));
+        (encoder).writeInt(((Integer) data.get(862)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(863)));
+        (encoder).writeInt(((Integer) data.get(864)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(865)));
+        (encoder).writeInt(((Integer) data.get(866)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(867)));
+        (encoder).writeInt(((Integer) data.get(868)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(869)));
+        (encoder).writeInt(((Integer) data.get(870)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(871)));
+        (encoder).writeInt(((Integer) data.get(872)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(873)));
+        (encoder).writeInt(((Integer) data.get(874)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(875)));
+        (encoder).writeInt(((Integer) data.get(876)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(877)));
+        (encoder).writeInt(((Integer) data.get(878)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(879)));
+        (encoder).writeInt(((Integer) data.get(880)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(881)));
+        (encoder).writeInt(((Integer) data.get(882)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(883)));
+        (encoder).writeInt(((Integer) data.get(884)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(885)));
+        (encoder).writeInt(((Integer) data.get(886)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(887)));
+        (encoder).writeInt(((Integer) data.get(888)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(889)));
+        (encoder).writeInt(((Integer) data.get(890)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(891)));
+        (encoder).writeInt(((Integer) data.get(892)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(893)));
+        (encoder).writeInt(((Integer) data.get(894)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(895)));
+        (encoder).writeInt(((Integer) data.get(896)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(897)));
+        (encoder).writeInt(((Integer) data.get(898)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(899)));
+        (encoder).writeInt(((Integer) data.get(900)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(901)));
+        (encoder).writeInt(((Integer) data.get(902)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(903)));
+        (encoder).writeInt(((Integer) data.get(904)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(905)));
+        (encoder).writeInt(((Integer) data.get(906)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(907)));
+        (encoder).writeInt(((Integer) data.get(908)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(909)));
+        (encoder).writeInt(((Integer) data.get(910)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(911)));
+        (encoder).writeInt(((Integer) data.get(912)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(913)));
+        (encoder).writeInt(((Integer) data.get(914)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(915)));
+        (encoder).writeInt(((Integer) data.get(916)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(917)));
+        (encoder).writeInt(((Integer) data.get(918)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(919)));
+        (encoder).writeInt(((Integer) data.get(920)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(921)));
+        (encoder).writeInt(((Integer) data.get(922)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(923)));
+        (encoder).writeInt(((Integer) data.get(924)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(925)));
+        (encoder).writeInt(((Integer) data.get(926)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(927)));
+        (encoder).writeInt(((Integer) data.get(928)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(929)));
+        (encoder).writeInt(((Integer) data.get(930)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(931)));
+        (encoder).writeInt(((Integer) data.get(932)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(933)));
+        (encoder).writeInt(((Integer) data.get(934)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(935)));
+        (encoder).writeInt(((Integer) data.get(936)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(937)));
+        (encoder).writeInt(((Integer) data.get(938)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(939)));
+        (encoder).writeInt(((Integer) data.get(940)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(941)));
+        (encoder).writeInt(((Integer) data.get(942)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(943)));
+        (encoder).writeInt(((Integer) data.get(944)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(945)));
+        (encoder).writeInt(((Integer) data.get(946)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(947)));
+        (encoder).writeInt(((Integer) data.get(948)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(949)));
+        (encoder).writeInt(((Integer) data.get(950)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(951)));
+        (encoder).writeInt(((Integer) data.get(952)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(953)));
+        (encoder).writeInt(((Integer) data.get(954)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(955)));
+        (encoder).writeInt(((Integer) data.get(956)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(957)));
+        (encoder).writeInt(((Integer) data.get(958)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(959)));
+        (encoder).writeInt(((Integer) data.get(960)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(961)));
+        (encoder).writeInt(((Integer) data.get(962)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(963)));
+        (encoder).writeInt(((Integer) data.get(964)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(965)));
+        (encoder).writeInt(((Integer) data.get(966)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(967)));
+        (encoder).writeInt(((Integer) data.get(968)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(969)));
+        (encoder).writeInt(((Integer) data.get(970)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(971)));
+        (encoder).writeInt(((Integer) data.get(972)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(973)));
+        (encoder).writeInt(((Integer) data.get(974)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(975)));
+        (encoder).writeInt(((Integer) data.get(976)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(977)));
+        (encoder).writeInt(((Integer) data.get(978)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(979)));
+        (encoder).writeInt(((Integer) data.get(980)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(981)));
+        (encoder).writeInt(((Integer) data.get(982)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(983)));
+        (encoder).writeInt(((Integer) data.get(984)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(985)));
+        (encoder).writeInt(((Integer) data.get(986)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(987)));
+        (encoder).writeInt(((Integer) data.get(988)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(989)));
+        (encoder).writeInt(((Integer) data.get(990)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(991)));
+        (encoder).writeInt(((Integer) data.get(992)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(993)));
+        (encoder).writeInt(((Integer) data.get(994)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(995)));
+        (encoder).writeInt(((Integer) data.get(996)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(997)));
+        (encoder).writeInt(((Integer) data.get(998)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(999)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
new file mode 100644
index 000000000..cf19f0cc7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
@@ -0,0 +1,116 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericEnumSymbol testEnumUnion0 = ((GenericEnumSymbol) data.get(1));
+        if (testEnumUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testEnumUnion0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) testEnumUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                int valueToWrite1;
+                Object enumValue1 = testEnumUnion0;
+                if (enumValue1 instanceof Enum) {
+                    valueToWrite1 = ((Enum) enumValue1).ordinal();
+                } else {
+                    valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                }
+                (encoder).writeEnum(valueToWrite1);
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray0 = ((List<GenericEnumSymbol> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testEnumArray0 == null)||testEnumArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumArray0 .size());
+            for (int counter0 = 0; (counter0 <testEnumArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                int valueToWrite2;
+                Object enumValue2 = testEnumArray0 .get(counter0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray0 = ((List<GenericEnumSymbol> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testEnumUnionArray0 == null)||testEnumUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testEnumUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericEnumSymbol union0 = null;
+                union0 = ((List<GenericEnumSymbol> ) testEnumUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        int valueToWrite3;
+                        Object enumValue3 = union0;
+                        if (enumValue3 instanceof Enum) {
+                            valueToWrite3 = ((Enum) enumValue3).ordinal();
+                        } else {
+                            valueToWrite3 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite3);
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
new file mode 100644
index 000000000..1cfb6a182
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
@@ -0,0 +1,88 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericFixed testFixedUnion0 = ((GenericFixed) data.get(1));
+        if (testFixedUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testFixedUnion0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) testFixedUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                (encoder).writeFixed(((GenericFixed) testFixedUnion0).bytes());
+            }
+        }
+        List<GenericFixed> testFixedArray0 = ((List<GenericFixed> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testFixedArray0 == null)||testFixedArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedArray0 .size());
+            for (int counter0 = 0; (counter0 <testFixedArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeFixed(((GenericFixed) testFixedArray0 .get(counter0)).bytes());
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = ((List<GenericFixed> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testFixedUnionArray0 == null)||testFixedUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testFixedUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericFixed union0 = null;
+                union0 = ((List<GenericFixed> ) testFixedUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeFixed(((GenericFixed) union0).bytes());
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
new file mode 100644
index 000000000..2185503e5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
@@ -0,0 +1,70 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union0 = ((Object) data.get(0));
+        if (union0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+            } else {
+                if (union0 instanceof CharSequence) {
+                    (encoder).writeIndex(2);
+                    if (((CharSequence) union0) instanceof Utf8) {
+                        (encoder).writeString(((Utf8)((CharSequence) union0)));
+                    } else {
+                        (encoder).writeString(((CharSequence) union0).toString());
+                    }
+                } else {
+                    if (union0 instanceof Integer) {
+                        (encoder).writeIndex(3);
+                        (encoder).writeInt(((Integer) union0));
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
new file mode 100644
index 000000000..181e6e0a8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
@@ -0,0 +1,157 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Integer testIntUnion0 = ((Integer) data.get(1));
+        if (testIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeInt(((Integer) testIntUnion0));
+        }
+        Integer testFlippedIntUnion0 = ((Integer) data.get(2));
+        if (testFlippedIntUnion0 == null) {
+            (encoder).writeIndex(1);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(0);
+            (encoder).writeInt(((Integer) testFlippedIntUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        CharSequence testStringUnion0 = ((CharSequence) data.get(4));
+        if (testStringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testStringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testStringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) testStringUnion0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(5)));
+        Long testLongUnion0 = ((Long) data.get(6));
+        if (testLongUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) testLongUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeDouble(((Double) data.get(7)));
+        Double testDoubleUnion0 = ((Double) data.get(8));
+        if (testDoubleUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeDouble(((Double) testDoubleUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFloat(((Float) data.get(9)));
+        Float testFloatUnion0 = ((Float) data.get(10));
+        if (testFloatUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeFloat(((Float) testFloatUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBoolean(((Boolean) data.get(11)));
+        Boolean testBooleanUnion0 = ((Boolean) data.get(12));
+        if (testBooleanUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBoolean(((Boolean) testBooleanUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBytes(((ByteBuffer) data.get(13)));
+        ByteBuffer testBytesUnion0 = ((ByteBuffer) data.get(14));
+        if (testBytesUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBytes(((ByteBuffer) testBytesUnion0));
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
new file mode 100644
index 000000000..9830bbd0f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union_field0 = ((Object) data.get(0));
+        if (union_field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record1".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeRecord10(((IndexedRecord) union_field0), (encoder), (customization));
+            } else {
+                if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                    (encoder).writeIndex(2);
+                    serializeRecord20(((IndexedRecord) union_field0), (encoder), (customization));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
new file mode 100644
index 000000000..5e0637301
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> recordsArray0 = ((List<IndexedRecord> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArray0 == null)||recordsArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArray0 .size());
+            for (int counter0 = 0; (counter0 <recordsArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord subRecord0 = null;
+                subRecord0 = ((List<IndexedRecord> ) recordsArray0).get(counter0);
+                serializeSubRecord0(subRecord0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMap0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMap0 == null)||recordsMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) recordsMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord subRecord1 = null;
+                subRecord1 = ((Map<CharSequence, IndexedRecord> ) recordsMap0).get(key0);
+                serializeSubRecord0(subRecord1, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+        List<IndexedRecord> recordsArrayUnion0 = ((List<IndexedRecord> ) data.get(2));
+        if (recordsArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<IndexedRecord> ) recordsArrayUnion0) == null)||((List<IndexedRecord> ) recordsArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<IndexedRecord> ) recordsArrayUnion0).size());
+                    for (int counter1 = 0; (counter1 <((List<IndexedRecord> ) recordsArrayUnion0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union0 = null;
+                        union0 = ((List<IndexedRecord> )((List<IndexedRecord> ) recordsArrayUnion0)).get(counter1);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMapUnion0 = ((Map<CharSequence, IndexedRecord> ) data.get(3));
+        if (recordsMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, IndexedRecord> ) recordsMapUnion0) == null)||((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).size());
+                    for (CharSequence key1 : ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key1);
+                        IndexedRecord union1 = null;
+                        union1 = ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).get(key1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
new file mode 100644
index 000000000..c550edf3b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
@@ -0,0 +1,230 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMap0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArrayMap0 == null)||recordsArrayMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArrayMap0 .size());
+            for (int counter0 = 0; (counter0 <recordsArrayMap0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Map<CharSequence, IndexedRecord> map0 = null;
+                map0 = ((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMap0).get(counter0);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(map0);
+                }
+                (encoder).writeMapStart();
+                if ((map0 == null)||map0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(map0 .size());
+                    for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) map0).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        IndexedRecord union0 = null;
+                        union0 = ((Map<CharSequence, IndexedRecord> ) map0).get(key0);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMapArray0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMapArray0 == null)||recordsMapArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMapArray0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                List<IndexedRecord> array0 = null;
+                array0 = ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).get(key1);
+                (encoder).writeArrayStart();
+                if ((array0 == null)||array0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(array0 .size());
+                    for (int counter1 = 0; (counter1 <array0 .size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union1 = null;
+                        union1 = ((List<IndexedRecord> ) array0).get(counter1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        (encoder).writeMapEnd();
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMapUnion0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(2));
+        if (recordsArrayMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayMapUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0) == null)||((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size());
+                    for (int counter2 = 0; (counter2 <((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size()); counter2 ++) {
+                        (encoder).startItem();
+                        Map<CharSequence, IndexedRecord> map1 = null;
+                        map1 = ((List<Map<CharSequence, IndexedRecord>> )((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0)).get(counter2);
+                        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                            (customization).getCheckMapTypeFunction().apply(map1);
+                        }
+                        (encoder).writeMapStart();
+                        if ((map1 == null)||map1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(map1 .size());
+                            for (CharSequence key2 : ((Map<CharSequence, IndexedRecord> ) map1).keySet()) {
+                                (encoder).startItem();
+                                (encoder).writeString(key2);
+                                IndexedRecord union2 = null;
+                                union2 = ((Map<CharSequence, IndexedRecord> ) map1).get(key2);
+                                if (union2 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union2 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union2).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union2), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeMapEnd();
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArrayUnion0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(3));
+        if (recordsMapArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapArrayUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0) == null)||((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).size());
+                    for (CharSequence key3 : ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key3);
+                        List<IndexedRecord> array1 = null;
+                        array1 = ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).get(key3);
+                        (encoder).writeArrayStart();
+                        if ((array1 == null)||array1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(array1 .size());
+                            for (int counter3 = 0; (counter3 <array1 .size()); counter3 ++) {
+                                (encoder).startItem();
+                                IndexedRecord union3 = null;
+                                union3 = ((List<IndexedRecord> ) array1).get(counter3);
+                                if (union3 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union3 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union3).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union3), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeArrayEnd();
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
new file mode 100644
index 000000000..6195e028e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record0 = ((IndexedRecord) data.get(0));
+        if (record0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((record0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) record0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) record0), (encoder), (customization));
+            }
+        }
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record10 = ((IndexedRecord) data.get(1));
+        serializeSubRecord0(record10, (encoder), (customization));
+        CharSequence field0 = ((CharSequence) data.get(2));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastSerdeEnums_GenericSerializer_957378572.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastSerdeEnums_GenericSerializer_957378572.java
new file mode 100644
index 000000000..877fcff35
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastSerdeEnums_GenericSerializer_957378572.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeEnums_GenericSerializer_957378572
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> arrayOfEnums0 = ((List<GenericEnumSymbol> ) data.get(1));
+        if (arrayOfEnums0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfEnums0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericEnumSymbol> ) arrayOfEnums0) == null)||((List<GenericEnumSymbol> ) arrayOfEnums0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericEnumSymbol> ) arrayOfEnums0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericEnumSymbol> ) arrayOfEnums0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        int valueToWrite1;
+                        Object enumValue1 = ((List<GenericEnumSymbol> ) arrayOfEnums0).get(counter0);
+                        if (enumValue1 instanceof Enum) {
+                            valueToWrite1 = ((Enum) enumValue1).ordinal();
+                        } else {
+                            valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite1);
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericEnumSymbol> mapOfEnums0 = ((Map<CharSequence, GenericEnumSymbol> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfEnums0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfEnums0 == null)||mapOfEnums0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfEnums0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericEnumSymbol> ) mapOfEnums0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                int valueToWrite2;
+                Object enumValue2 = mapOfEnums0 .get(key0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastSerdeFixed_GenericSerializer_504108934.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastSerdeFixed_GenericSerializer_504108934.java
new file mode 100644
index 000000000..a0722f62a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastSerdeFixed_GenericSerializer_504108934.java
@@ -0,0 +1,74 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeFixed_GenericSerializer_504108934
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> arrayOfFixed0 = ((List<GenericFixed> ) data.get(1));
+        if (arrayOfFixed0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfFixed0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericFixed> ) arrayOfFixed0) == null)||((List<GenericFixed> ) arrayOfFixed0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericFixed> ) arrayOfFixed0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericFixed> ) arrayOfFixed0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFixed(((GenericFixed)((List<GenericFixed> ) arrayOfFixed0).get(counter0)).bytes());
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericFixed> mapOfFixed0 = ((Map<CharSequence, GenericFixed> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfFixed0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfFixed0 == null)||mapOfFixed0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfFixed0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericFixed> ) mapOfFixed0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                (encoder).writeFixed(((GenericFixed) mapOfFixed0 .get(key0)).bytes());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
new file mode 100644
index 000000000..175c90253
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
new file mode 100644
index 000000000..5eb40676c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Map_of_UNION_GenericSerializer_2140000109.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Map_of_UNION_GenericSerializer_2140000109.java
new file mode 100644
index 000000000..be6d17838
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Map_of_UNION_GenericSerializer_2140000109.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericSerializer_2140000109
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord union0 = null;
+                union0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Map_of_record_GenericSerializer_1677529043.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Map_of_record_GenericSerializer_1677529043.java
new file mode 100644
index 000000000..f8fb74396
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/Map_of_record_GenericSerializer_1677529043.java
@@ -0,0 +1,57 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericSerializer_1677529043
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord record0 = null;
+                record0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/StringableRecord_SpecificSerializer_842267318.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/StringableRecord_SpecificSerializer_842267318.java
new file mode 100644
index 000000000..90ef4fadb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/StringableRecord_SpecificSerializer_842267318.java
@@ -0,0 +1,159 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.URI;
+import java.net.URL;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableSubRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificSerializer_842267318
+    implements FastSerializer<StringableRecord>
+{
+
+
+    public void serialize(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeStringableRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigInteger) data.get(0)).toString());
+        serialize_StringableRecord0(data, (encoder), (customization));
+        serialize_StringableRecord1(data, (encoder), (customization));
+        serialize_StringableRecord2(data, (encoder), (customization));
+        serialize_StringableRecord3(data, (encoder), (customization));
+        serialize_StringableRecord4(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigDecimal) data.get(1)).toString());
+        (encoder).writeString(((URI) data.get(2)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord1(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URL) data.get(3)).toString());
+        (encoder).writeString(((File) data.get(4)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord2(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<URL> urlArray0 = ((List<URL> ) data.get(5));
+        (encoder).writeArrayStart();
+        if ((urlArray0 == null)||urlArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlArray0 .size());
+            for (int counter0 = 0; (counter0 <urlArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeString(urlArray0 .get(counter0).toString());
+            }
+        }
+        (encoder).writeArrayEnd();
+        Map<URL, BigInteger> urlMap0 = ((Map<URL, BigInteger> ) data.get(6));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(urlMap0);
+        }
+        (encoder).writeMapStart();
+        if ((urlMap0 == null)||urlMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlMap0 .size());
+            for (URL key0 : ((Map<URL, BigInteger> ) urlMap0).keySet()) {
+                (encoder).startItem();
+                String keyString0 = key0 .toString();
+                (encoder).writeString(keyString0);
+                (encoder).writeString(((BigInteger) urlMap0 .get(key0)).toString());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord3(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord0 = ((StringableSubRecord) data.get(7));
+        serializeStringableSubRecord0(subRecord0, (encoder), (customization));
+        AnotherSubRecord subRecordWithSubRecord0 = ((AnotherSubRecord) data.get(8));
+        serializeAnotherSubRecord0(subRecordWithSubRecord0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URI) data.get(0)).toString());
+        serialize_StringableSubRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object nullStringIntUnion0 = ((Object) data.get(1));
+        if (nullStringIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullStringIntUnion0 instanceof CharSequence) {
+                (encoder).writeIndex(1);
+                if (((CharSequence) nullStringIntUnion0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) nullStringIntUnion0)));
+                } else {
+                    (encoder).writeString(((CharSequence) nullStringIntUnion0).toString());
+                }
+            } else {
+                if (nullStringIntUnion0 instanceof Integer) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeInt(((Integer) nullStringIntUnion0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord1 = ((StringableSubRecord) data.get(0));
+        serializeStringableSubRecord0(subRecord1, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord4(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        String stringUnion0 = ((String) data.get(9));
+        if (stringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeString(((String) stringUnion0).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/TestArrayOfFloats_GenericSerializer_1408566797.java b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/TestArrayOfFloats_GenericSerializer_1408566797.java
new file mode 100644
index 000000000..67a64c89c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests17/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_7/TestArrayOfFloats_GenericSerializer_1408566797.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_7;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class TestArrayOfFloats_GenericSerializer_1408566797
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeTestArrayOfFloats0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Float> array_of_float0 = ((List<Float> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((array_of_float0 == null)||array_of_float0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(array_of_float0 .size());
+            Object array0 = array_of_float0;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <array_of_float0 .size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(array_of_float0 .get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
new file mode 100644
index 000000000..b15699b33
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_BOOLEAN_GenericDeserializer_869749973_869749973
+    implements FastDeserializer<List<Boolean>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_BOOLEAN_GenericDeserializer_869749973_869749973(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveBooleanList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveBooleanList) {
+            array0 = ((PrimitiveBooleanList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveBooleanArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
new file mode 100644
index 000000000..0e685f3c0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_DOUBLE_GenericDeserializer_18760307_18760307
+    implements FastDeserializer<List<Double>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_DOUBLE_GenericDeserializer_18760307_18760307(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Double> deserialize(List<Double> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveDoubleList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveDoubleList) {
+            array0 = ((PrimitiveDoubleList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveDoubleArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
new file mode 100644
index 000000000..6c42a0c5c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
@@ -0,0 +1,31 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_FLOAT_GenericDeserializer_1012670397_1012670397
+    implements FastDeserializer<List<Float>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_FLOAT_GenericDeserializer_1012670397_1012670397(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Float> deserialize(List<Float> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveFloatList array0 = null;
+        array0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray((reuse), (decoder)));
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_INT_GenericDeserializer_1012089072_1012089072.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
new file mode 100644
index 000000000..6a8f125cc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_INT_GenericDeserializer_1012089072_1012089072
+    implements FastDeserializer<List<Integer>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_INT_GenericDeserializer_1012089072_1012089072(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Integer> deserialize(List<Integer> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveIntList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveIntList) {
+            array0 = ((PrimitiveIntList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_LONG_GenericDeserializer_325099267_325099267.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_LONG_GenericDeserializer_325099267_325099267.java
new file mode 100644
index 000000000..5ca3022d3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_LONG_GenericDeserializer_325099267_325099267.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_LONG_GenericDeserializer_325099267_325099267
+    implements FastDeserializer<List<Long>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_LONG_GenericDeserializer_325099267_325099267(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Long> deserialize(List<Long> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveLongList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveLongList) {
+            array0 = ((PrimitiveLongList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveLongArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
new file mode 100644
index 000000000..0920854e6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
@@ -0,0 +1,1058 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_UNION_GenericDeserializer_777827233_777827233.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_UNION_GenericDeserializer_777827233_777827233.java
new file mode 100644
index 000000000..7548f5d0d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_UNION_GenericDeserializer_777827233_777827233.java
@@ -0,0 +1,94 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericDeserializer_777827233_777827233
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema arrayElemOptionSchema0;
+    private final Schema field0;
+
+    public Array_of_UNION_GenericDeserializer_777827233_777827233(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.arrayElemOptionSchema0 = arrayArrayElemSchema0 .getTypes().get(1);
+        this.field0 = arrayElemOptionSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayElemOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayElemOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
new file mode 100644
index 000000000..5e4691a10
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
@@ -0,0 +1,1068 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_SpecificDeserializer_1277939469_1277939469
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_UNION_SpecificDeserializer_1277939469_1277939469(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_record_GenericDeserializer_1606337179_2018567528.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_record_GenericDeserializer_1606337179_2018567528.java
new file mode 100644
index 000000000..a560ae581
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_record_GenericDeserializer_1606337179_2018567528.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_record_GenericDeserializer_1606337179_2018567528
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionArrayElemSchema0;
+
+    public Array_of_record_GenericDeserializer_1606337179_2018567528(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionArrayElemSchema0 = readerSchema.getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                List<IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                if ((reuse) instanceof List) {
+                    unionOption0 = ((List)(reuse));
+                    unionOption0 .clear();
+                } else {
+                    unionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object unionOptionArrayElementReuseVar0 = null;
+                        if ((reuse) instanceof GenericArray) {
+                            unionOptionArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                        }
+                        unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder), (customization)));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_record_GenericDeserializer_477614132_477614132.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_record_GenericDeserializer_477614132_477614132.java
new file mode 100644
index 000000000..4717a0f04
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Array_of_record_GenericDeserializer_477614132_477614132.java
@@ -0,0 +1,82 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericDeserializer_477614132_477614132
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema field0;
+
+    public Array_of_record_GenericDeserializer_477614132_477614132(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.field0 = arrayArrayElemSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
new file mode 100644
index 000000000..d386c34c8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
@@ -0,0 +1,23040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema f00;
+    private final Schema f10;
+    private final Schema f20;
+    private final Schema f30;
+    private final Schema f40;
+    private final Schema f50;
+    private final Schema f60;
+    private final Schema f70;
+    private final Schema f80;
+    private final Schema f90;
+    private final Schema f100;
+    private final Schema f110;
+    private final Schema f120;
+    private final Schema f130;
+    private final Schema f140;
+    private final Schema f150;
+    private final Schema f160;
+    private final Schema f170;
+    private final Schema f180;
+    private final Schema f190;
+    private final Schema f200;
+    private final Schema f210;
+    private final Schema f220;
+    private final Schema f230;
+    private final Schema f240;
+    private final Schema f250;
+    private final Schema f260;
+    private final Schema f270;
+    private final Schema f280;
+    private final Schema f290;
+    private final Schema f300;
+    private final Schema f310;
+    private final Schema f320;
+    private final Schema f330;
+    private final Schema f340;
+    private final Schema f350;
+    private final Schema f360;
+    private final Schema f370;
+    private final Schema f380;
+    private final Schema f390;
+    private final Schema f400;
+    private final Schema f410;
+    private final Schema f420;
+    private final Schema f430;
+    private final Schema f440;
+    private final Schema f450;
+    private final Schema f460;
+    private final Schema f470;
+    private final Schema f480;
+    private final Schema f490;
+    private final Schema f500;
+    private final Schema f510;
+    private final Schema f520;
+    private final Schema f530;
+    private final Schema f540;
+    private final Schema f550;
+    private final Schema f560;
+    private final Schema f570;
+    private final Schema f580;
+    private final Schema f590;
+    private final Schema f600;
+    private final Schema f610;
+    private final Schema f620;
+    private final Schema f630;
+    private final Schema f640;
+    private final Schema f650;
+    private final Schema f660;
+    private final Schema f670;
+    private final Schema f680;
+    private final Schema f690;
+    private final Schema f700;
+    private final Schema f710;
+    private final Schema f720;
+    private final Schema f730;
+    private final Schema f740;
+    private final Schema f750;
+    private final Schema f760;
+    private final Schema f770;
+    private final Schema f780;
+    private final Schema f790;
+    private final Schema f800;
+    private final Schema f810;
+    private final Schema f820;
+    private final Schema f830;
+    private final Schema f840;
+    private final Schema f850;
+    private final Schema f860;
+    private final Schema f870;
+    private final Schema f880;
+    private final Schema f890;
+    private final Schema f900;
+    private final Schema f910;
+    private final Schema f920;
+    private final Schema f930;
+    private final Schema f940;
+    private final Schema f950;
+    private final Schema f960;
+    private final Schema f970;
+    private final Schema f980;
+    private final Schema f990;
+    private final Schema f1000;
+    private final Schema f1010;
+    private final Schema f1020;
+    private final Schema f1030;
+    private final Schema f1040;
+    private final Schema f1050;
+    private final Schema f1060;
+    private final Schema f1070;
+    private final Schema f1080;
+    private final Schema f1090;
+    private final Schema f1100;
+    private final Schema f1110;
+    private final Schema f1120;
+    private final Schema f1130;
+    private final Schema f1140;
+    private final Schema f1150;
+    private final Schema f1160;
+    private final Schema f1170;
+    private final Schema f1180;
+    private final Schema f1190;
+    private final Schema f1200;
+    private final Schema f1210;
+    private final Schema f1220;
+    private final Schema f1230;
+    private final Schema f1240;
+    private final Schema f1250;
+    private final Schema f1260;
+    private final Schema f1270;
+    private final Schema f1280;
+    private final Schema f1290;
+    private final Schema f1300;
+    private final Schema f1310;
+    private final Schema f1320;
+    private final Schema f1330;
+    private final Schema f1340;
+    private final Schema f1350;
+    private final Schema f1360;
+    private final Schema f1370;
+    private final Schema f1380;
+    private final Schema f1390;
+    private final Schema f1400;
+    private final Schema f1410;
+    private final Schema f1420;
+    private final Schema f1430;
+    private final Schema f1440;
+    private final Schema f1450;
+    private final Schema f1460;
+    private final Schema f1470;
+    private final Schema f1480;
+    private final Schema f1490;
+    private final Schema f1500;
+    private final Schema f1510;
+    private final Schema f1520;
+    private final Schema f1530;
+    private final Schema f1540;
+    private final Schema f1550;
+    private final Schema f1560;
+    private final Schema f1570;
+    private final Schema f1580;
+    private final Schema f1590;
+    private final Schema f1600;
+    private final Schema f1610;
+    private final Schema f1620;
+    private final Schema f1630;
+    private final Schema f1640;
+    private final Schema f1650;
+    private final Schema f1660;
+    private final Schema f1670;
+    private final Schema f1680;
+    private final Schema f1690;
+    private final Schema f1700;
+    private final Schema f1710;
+    private final Schema f1720;
+    private final Schema f1730;
+    private final Schema f1740;
+    private final Schema f1750;
+    private final Schema f1760;
+    private final Schema f1770;
+    private final Schema f1780;
+    private final Schema f1790;
+    private final Schema f1800;
+    private final Schema f1810;
+    private final Schema f1820;
+    private final Schema f1830;
+    private final Schema f1840;
+    private final Schema f1850;
+    private final Schema f1860;
+    private final Schema f1870;
+    private final Schema f1880;
+    private final Schema f1890;
+    private final Schema f1900;
+    private final Schema f1910;
+    private final Schema f1920;
+    private final Schema f1930;
+    private final Schema f1940;
+    private final Schema f1950;
+    private final Schema f1960;
+    private final Schema f1970;
+    private final Schema f1980;
+    private final Schema f1990;
+    private final Schema f2000;
+    private final Schema f2010;
+    private final Schema f2020;
+    private final Schema f2030;
+    private final Schema f2040;
+    private final Schema f2050;
+    private final Schema f2060;
+    private final Schema f2070;
+    private final Schema f2080;
+    private final Schema f2090;
+    private final Schema f2100;
+    private final Schema f2110;
+    private final Schema f2120;
+    private final Schema f2130;
+    private final Schema f2140;
+    private final Schema f2150;
+    private final Schema f2160;
+    private final Schema f2170;
+    private final Schema f2180;
+    private final Schema f2190;
+    private final Schema f2200;
+    private final Schema f2210;
+    private final Schema f2220;
+    private final Schema f2230;
+    private final Schema f2240;
+    private final Schema f2250;
+    private final Schema f2260;
+    private final Schema f2270;
+    private final Schema f2280;
+    private final Schema f2290;
+    private final Schema f2300;
+    private final Schema f2310;
+    private final Schema f2320;
+    private final Schema f2330;
+    private final Schema f2340;
+    private final Schema f2350;
+    private final Schema f2360;
+    private final Schema f2370;
+    private final Schema f2380;
+    private final Schema f2390;
+    private final Schema f2400;
+    private final Schema f2410;
+    private final Schema f2420;
+    private final Schema f2430;
+    private final Schema f2440;
+    private final Schema f2450;
+    private final Schema f2460;
+    private final Schema f2470;
+    private final Schema f2480;
+    private final Schema f2490;
+    private final Schema f2500;
+    private final Schema f2510;
+    private final Schema f2520;
+    private final Schema f2530;
+    private final Schema f2540;
+    private final Schema f2550;
+    private final Schema f2560;
+    private final Schema f2570;
+    private final Schema f2580;
+    private final Schema f2590;
+    private final Schema f2600;
+    private final Schema f2610;
+    private final Schema f2620;
+    private final Schema f2630;
+    private final Schema f2640;
+    private final Schema f2650;
+    private final Schema f2660;
+    private final Schema f2670;
+    private final Schema f2680;
+    private final Schema f2690;
+    private final Schema f2700;
+    private final Schema f2710;
+    private final Schema f2720;
+    private final Schema f2730;
+    private final Schema f2740;
+    private final Schema f2750;
+    private final Schema f2760;
+    private final Schema f2770;
+    private final Schema f2780;
+    private final Schema f2790;
+    private final Schema f2800;
+    private final Schema f2810;
+    private final Schema f2820;
+    private final Schema f2830;
+    private final Schema f2840;
+    private final Schema f2850;
+    private final Schema f2860;
+    private final Schema f2870;
+    private final Schema f2880;
+    private final Schema f2890;
+    private final Schema f2900;
+    private final Schema f2910;
+    private final Schema f2920;
+    private final Schema f2930;
+    private final Schema f2940;
+    private final Schema f2950;
+    private final Schema f2960;
+    private final Schema f2970;
+    private final Schema f2980;
+    private final Schema f2990;
+    private final Schema f3000;
+    private final Schema f3010;
+    private final Schema f3020;
+    private final Schema f3030;
+    private final Schema f3040;
+    private final Schema f3050;
+    private final Schema f3060;
+    private final Schema f3070;
+    private final Schema f3080;
+    private final Schema f3090;
+    private final Schema f3100;
+    private final Schema f3110;
+    private final Schema f3120;
+    private final Schema f3130;
+    private final Schema f3140;
+    private final Schema f3150;
+    private final Schema f3160;
+    private final Schema f3170;
+    private final Schema f3180;
+    private final Schema f3190;
+    private final Schema f3200;
+    private final Schema f3210;
+    private final Schema f3220;
+    private final Schema f3230;
+    private final Schema f3240;
+    private final Schema f3250;
+    private final Schema f3260;
+    private final Schema f3270;
+    private final Schema f3280;
+    private final Schema f3290;
+    private final Schema f3300;
+    private final Schema f3310;
+    private final Schema f3320;
+    private final Schema f3330;
+    private final Schema f3340;
+    private final Schema f3350;
+    private final Schema f3360;
+    private final Schema f3370;
+    private final Schema f3380;
+    private final Schema f3390;
+    private final Schema f3400;
+    private final Schema f3410;
+    private final Schema f3420;
+    private final Schema f3430;
+    private final Schema f3440;
+    private final Schema f3450;
+    private final Schema f3460;
+    private final Schema f3470;
+    private final Schema f3480;
+    private final Schema f3490;
+    private final Schema f3500;
+    private final Schema f3510;
+    private final Schema f3520;
+    private final Schema f3530;
+    private final Schema f3540;
+    private final Schema f3550;
+    private final Schema f3560;
+    private final Schema f3570;
+    private final Schema f3580;
+    private final Schema f3590;
+    private final Schema f3600;
+    private final Schema f3610;
+    private final Schema f3620;
+    private final Schema f3630;
+    private final Schema f3640;
+    private final Schema f3650;
+    private final Schema f3660;
+    private final Schema f3670;
+    private final Schema f3680;
+    private final Schema f3690;
+    private final Schema f3700;
+    private final Schema f3710;
+    private final Schema f3720;
+    private final Schema f3730;
+    private final Schema f3740;
+    private final Schema f3750;
+    private final Schema f3760;
+    private final Schema f3770;
+    private final Schema f3780;
+    private final Schema f3790;
+    private final Schema f3800;
+    private final Schema f3810;
+    private final Schema f3820;
+    private final Schema f3830;
+    private final Schema f3840;
+    private final Schema f3850;
+    private final Schema f3860;
+    private final Schema f3870;
+    private final Schema f3880;
+    private final Schema f3890;
+    private final Schema f3900;
+    private final Schema f3910;
+    private final Schema f3920;
+    private final Schema f3930;
+    private final Schema f3940;
+    private final Schema f3950;
+    private final Schema f3960;
+    private final Schema f3970;
+    private final Schema f3980;
+    private final Schema f3990;
+    private final Schema f4000;
+    private final Schema f4010;
+    private final Schema f4020;
+    private final Schema f4030;
+    private final Schema f4040;
+    private final Schema f4050;
+    private final Schema f4060;
+    private final Schema f4070;
+    private final Schema f4080;
+    private final Schema f4090;
+    private final Schema f4100;
+    private final Schema f4110;
+    private final Schema f4120;
+    private final Schema f4130;
+    private final Schema f4140;
+    private final Schema f4150;
+    private final Schema f4160;
+    private final Schema f4170;
+    private final Schema f4180;
+    private final Schema f4190;
+    private final Schema f4200;
+    private final Schema f4210;
+    private final Schema f4220;
+    private final Schema f4230;
+    private final Schema f4240;
+    private final Schema f4250;
+    private final Schema f4260;
+    private final Schema f4270;
+    private final Schema f4280;
+    private final Schema f4290;
+    private final Schema f4300;
+    private final Schema f4310;
+    private final Schema f4320;
+    private final Schema f4330;
+    private final Schema f4340;
+    private final Schema f4350;
+    private final Schema f4360;
+    private final Schema f4370;
+    private final Schema f4380;
+    private final Schema f4390;
+    private final Schema f4400;
+    private final Schema f4410;
+    private final Schema f4420;
+    private final Schema f4430;
+    private final Schema f4440;
+    private final Schema f4450;
+    private final Schema f4460;
+    private final Schema f4470;
+    private final Schema f4480;
+    private final Schema f4490;
+    private final Schema f4500;
+    private final Schema f4510;
+    private final Schema f4520;
+    private final Schema f4530;
+    private final Schema f4540;
+    private final Schema f4550;
+    private final Schema f4560;
+    private final Schema f4570;
+    private final Schema f4580;
+    private final Schema f4590;
+    private final Schema f4600;
+    private final Schema f4610;
+    private final Schema f4620;
+    private final Schema f4630;
+    private final Schema f4640;
+    private final Schema f4650;
+    private final Schema f4660;
+    private final Schema f4670;
+    private final Schema f4680;
+    private final Schema f4690;
+    private final Schema f4700;
+    private final Schema f4710;
+    private final Schema f4720;
+    private final Schema f4730;
+    private final Schema f4740;
+    private final Schema f4750;
+    private final Schema f4760;
+    private final Schema f4770;
+    private final Schema f4780;
+    private final Schema f4790;
+    private final Schema f4800;
+    private final Schema f4810;
+    private final Schema f4820;
+    private final Schema f4830;
+    private final Schema f4840;
+    private final Schema f4850;
+    private final Schema f4860;
+    private final Schema f4870;
+    private final Schema f4880;
+    private final Schema f4890;
+    private final Schema f4900;
+    private final Schema f4910;
+    private final Schema f4920;
+    private final Schema f4930;
+    private final Schema f4940;
+    private final Schema f4950;
+    private final Schema f4960;
+    private final Schema f4970;
+    private final Schema f4980;
+    private final Schema f4990;
+    private final Schema f5000;
+    private final Schema f5010;
+    private final Schema f5020;
+    private final Schema f5030;
+    private final Schema f5040;
+    private final Schema f5050;
+    private final Schema f5060;
+    private final Schema f5070;
+    private final Schema f5080;
+    private final Schema f5090;
+    private final Schema f5100;
+    private final Schema f5110;
+    private final Schema f5120;
+    private final Schema f5130;
+    private final Schema f5140;
+    private final Schema f5150;
+    private final Schema f5160;
+    private final Schema f5170;
+    private final Schema f5180;
+    private final Schema f5190;
+    private final Schema f5200;
+    private final Schema f5210;
+    private final Schema f5220;
+    private final Schema f5230;
+    private final Schema f5240;
+    private final Schema f5250;
+    private final Schema f5260;
+    private final Schema f5270;
+    private final Schema f5280;
+    private final Schema f5290;
+    private final Schema f5300;
+    private final Schema f5310;
+    private final Schema f5320;
+    private final Schema f5330;
+    private final Schema f5340;
+    private final Schema f5350;
+    private final Schema f5360;
+    private final Schema f5370;
+    private final Schema f5380;
+    private final Schema f5390;
+    private final Schema f5400;
+    private final Schema f5410;
+    private final Schema f5420;
+    private final Schema f5430;
+    private final Schema f5440;
+    private final Schema f5450;
+    private final Schema f5460;
+    private final Schema f5470;
+    private final Schema f5480;
+    private final Schema f5490;
+    private final Schema f5500;
+    private final Schema f5510;
+    private final Schema f5520;
+    private final Schema f5530;
+    private final Schema f5540;
+    private final Schema f5550;
+    private final Schema f5560;
+    private final Schema f5570;
+    private final Schema f5580;
+    private final Schema f5590;
+    private final Schema f5600;
+    private final Schema f5610;
+    private final Schema f5620;
+    private final Schema f5630;
+    private final Schema f5640;
+    private final Schema f5650;
+    private final Schema f5660;
+    private final Schema f5670;
+    private final Schema f5680;
+    private final Schema f5690;
+    private final Schema f5700;
+    private final Schema f5710;
+    private final Schema f5720;
+    private final Schema f5730;
+    private final Schema f5740;
+    private final Schema f5750;
+    private final Schema f5760;
+    private final Schema f5770;
+    private final Schema f5780;
+    private final Schema f5790;
+    private final Schema f5800;
+    private final Schema f5810;
+    private final Schema f5820;
+    private final Schema f5830;
+    private final Schema f5840;
+    private final Schema f5850;
+    private final Schema f5860;
+    private final Schema f5870;
+    private final Schema f5880;
+    private final Schema f5890;
+    private final Schema f5900;
+    private final Schema f5910;
+    private final Schema f5920;
+    private final Schema f5930;
+    private final Schema f5940;
+    private final Schema f5950;
+    private final Schema f5960;
+    private final Schema f5970;
+    private final Schema f5980;
+    private final Schema f5990;
+    private final Schema f6000;
+    private final Schema f6010;
+    private final Schema f6020;
+    private final Schema f6030;
+    private final Schema f6040;
+    private final Schema f6050;
+    private final Schema f6060;
+    private final Schema f6070;
+    private final Schema f6080;
+    private final Schema f6090;
+    private final Schema f6100;
+    private final Schema f6110;
+    private final Schema f6120;
+    private final Schema f6130;
+    private final Schema f6140;
+    private final Schema f6150;
+    private final Schema f6160;
+    private final Schema f6170;
+    private final Schema f6180;
+    private final Schema f6190;
+    private final Schema f6200;
+    private final Schema f6210;
+    private final Schema f6220;
+    private final Schema f6230;
+    private final Schema f6240;
+    private final Schema f6250;
+    private final Schema f6260;
+    private final Schema f6270;
+    private final Schema f6280;
+    private final Schema f6290;
+    private final Schema f6300;
+    private final Schema f6310;
+    private final Schema f6320;
+    private final Schema f6330;
+    private final Schema f6340;
+    private final Schema f6350;
+    private final Schema f6360;
+    private final Schema f6370;
+    private final Schema f6380;
+    private final Schema f6390;
+    private final Schema f6400;
+    private final Schema f6410;
+    private final Schema f6420;
+    private final Schema f6430;
+    private final Schema f6440;
+    private final Schema f6450;
+    private final Schema f6460;
+    private final Schema f6470;
+    private final Schema f6480;
+    private final Schema f6490;
+    private final Schema f6500;
+    private final Schema f6510;
+    private final Schema f6520;
+    private final Schema f6530;
+    private final Schema f6540;
+    private final Schema f6550;
+    private final Schema f6560;
+    private final Schema f6570;
+    private final Schema f6580;
+    private final Schema f6590;
+    private final Schema f6600;
+    private final Schema f6610;
+    private final Schema f6620;
+    private final Schema f6630;
+    private final Schema f6640;
+    private final Schema f6650;
+    private final Schema f6660;
+    private final Schema f6670;
+    private final Schema f6680;
+    private final Schema f6690;
+    private final Schema f6700;
+    private final Schema f6710;
+    private final Schema f6720;
+    private final Schema f6730;
+    private final Schema f6740;
+    private final Schema f6750;
+    private final Schema f6760;
+    private final Schema f6770;
+    private final Schema f6780;
+    private final Schema f6790;
+    private final Schema f6800;
+    private final Schema f6810;
+    private final Schema f6820;
+    private final Schema f6830;
+    private final Schema f6840;
+    private final Schema f6850;
+    private final Schema f6860;
+    private final Schema f6870;
+    private final Schema f6880;
+    private final Schema f6890;
+    private final Schema f6900;
+    private final Schema f6910;
+    private final Schema f6920;
+    private final Schema f6930;
+    private final Schema f6940;
+    private final Schema f6950;
+    private final Schema f6960;
+    private final Schema f6970;
+    private final Schema f6980;
+    private final Schema f6990;
+    private final Schema f7000;
+    private final Schema f7010;
+    private final Schema f7020;
+    private final Schema f7030;
+    private final Schema f7040;
+    private final Schema f7050;
+    private final Schema f7060;
+    private final Schema f7070;
+    private final Schema f7080;
+    private final Schema f7090;
+    private final Schema f7100;
+    private final Schema f7110;
+    private final Schema f7120;
+    private final Schema f7130;
+    private final Schema f7140;
+    private final Schema f7150;
+    private final Schema f7160;
+    private final Schema f7170;
+    private final Schema f7180;
+    private final Schema f7190;
+    private final Schema f7200;
+    private final Schema f7210;
+    private final Schema f7220;
+    private final Schema f7230;
+    private final Schema f7240;
+    private final Schema f7250;
+    private final Schema f7260;
+    private final Schema f7270;
+    private final Schema f7280;
+    private final Schema f7290;
+    private final Schema f7300;
+    private final Schema f7310;
+    private final Schema f7320;
+    private final Schema f7330;
+    private final Schema f7340;
+    private final Schema f7350;
+    private final Schema f7360;
+    private final Schema f7370;
+    private final Schema f7380;
+    private final Schema f7390;
+    private final Schema f7400;
+    private final Schema f7410;
+    private final Schema f7420;
+    private final Schema f7430;
+    private final Schema f7440;
+    private final Schema f7450;
+    private final Schema f7460;
+    private final Schema f7470;
+    private final Schema f7480;
+    private final Schema f7490;
+    private final Schema f7500;
+    private final Schema f7510;
+    private final Schema f7520;
+    private final Schema f7530;
+    private final Schema f7540;
+    private final Schema f7550;
+    private final Schema f7560;
+    private final Schema f7570;
+    private final Schema f7580;
+    private final Schema f7590;
+    private final Schema f7600;
+    private final Schema f7610;
+    private final Schema f7620;
+    private final Schema f7630;
+    private final Schema f7640;
+    private final Schema f7650;
+    private final Schema f7660;
+    private final Schema f7670;
+    private final Schema f7680;
+    private final Schema f7690;
+    private final Schema f7700;
+    private final Schema f7710;
+    private final Schema f7720;
+    private final Schema f7730;
+    private final Schema f7740;
+    private final Schema f7750;
+    private final Schema f7760;
+    private final Schema f7770;
+    private final Schema f7780;
+    private final Schema f7790;
+    private final Schema f7800;
+    private final Schema f7810;
+    private final Schema f7820;
+    private final Schema f7830;
+    private final Schema f7840;
+    private final Schema f7850;
+    private final Schema f7860;
+    private final Schema f7870;
+    private final Schema f7880;
+    private final Schema f7890;
+    private final Schema f7900;
+    private final Schema f7910;
+    private final Schema f7920;
+    private final Schema f7930;
+    private final Schema f7940;
+    private final Schema f7950;
+    private final Schema f7960;
+    private final Schema f7970;
+    private final Schema f7980;
+    private final Schema f7990;
+    private final Schema f8000;
+    private final Schema f8010;
+    private final Schema f8020;
+    private final Schema f8030;
+    private final Schema f8040;
+    private final Schema f8050;
+    private final Schema f8060;
+    private final Schema f8070;
+    private final Schema f8080;
+    private final Schema f8090;
+    private final Schema f8100;
+    private final Schema f8110;
+    private final Schema f8120;
+    private final Schema f8130;
+    private final Schema f8140;
+    private final Schema f8150;
+    private final Schema f8160;
+    private final Schema f8170;
+    private final Schema f8180;
+    private final Schema f8190;
+    private final Schema f8200;
+    private final Schema f8210;
+    private final Schema f8220;
+    private final Schema f8230;
+    private final Schema f8240;
+    private final Schema f8250;
+    private final Schema f8260;
+    private final Schema f8270;
+    private final Schema f8280;
+    private final Schema f8290;
+    private final Schema f8300;
+    private final Schema f8310;
+    private final Schema f8320;
+    private final Schema f8330;
+    private final Schema f8340;
+    private final Schema f8350;
+    private final Schema f8360;
+    private final Schema f8370;
+    private final Schema f8380;
+    private final Schema f8390;
+    private final Schema f8400;
+    private final Schema f8410;
+    private final Schema f8420;
+    private final Schema f8430;
+    private final Schema f8440;
+    private final Schema f8450;
+    private final Schema f8460;
+    private final Schema f8470;
+    private final Schema f8480;
+    private final Schema f8490;
+    private final Schema f8500;
+    private final Schema f8510;
+    private final Schema f8520;
+    private final Schema f8530;
+    private final Schema f8540;
+    private final Schema f8550;
+    private final Schema f8560;
+    private final Schema f8570;
+    private final Schema f8580;
+    private final Schema f8590;
+    private final Schema f8600;
+    private final Schema f8610;
+    private final Schema f8620;
+    private final Schema f8630;
+    private final Schema f8640;
+    private final Schema f8650;
+    private final Schema f8660;
+    private final Schema f8670;
+    private final Schema f8680;
+    private final Schema f8690;
+    private final Schema f8700;
+    private final Schema f8710;
+    private final Schema f8720;
+    private final Schema f8730;
+    private final Schema f8740;
+    private final Schema f8750;
+    private final Schema f8760;
+    private final Schema f8770;
+    private final Schema f8780;
+    private final Schema f8790;
+    private final Schema f8800;
+    private final Schema f8810;
+    private final Schema f8820;
+    private final Schema f8830;
+    private final Schema f8840;
+    private final Schema f8850;
+    private final Schema f8860;
+    private final Schema f8870;
+    private final Schema f8880;
+    private final Schema f8890;
+    private final Schema f8900;
+    private final Schema f8910;
+    private final Schema f8920;
+    private final Schema f8930;
+    private final Schema f8940;
+    private final Schema f8950;
+    private final Schema f8960;
+    private final Schema f8970;
+    private final Schema f8980;
+    private final Schema f8990;
+    private final Schema f9000;
+    private final Schema f9010;
+    private final Schema f9020;
+    private final Schema f9030;
+    private final Schema f9040;
+    private final Schema f9050;
+    private final Schema f9060;
+    private final Schema f9070;
+    private final Schema f9080;
+    private final Schema f9090;
+    private final Schema f9100;
+    private final Schema f9110;
+    private final Schema f9120;
+    private final Schema f9130;
+    private final Schema f9140;
+    private final Schema f9150;
+    private final Schema f9160;
+    private final Schema f9170;
+    private final Schema f9180;
+    private final Schema f9190;
+    private final Schema f9200;
+    private final Schema f9210;
+    private final Schema f9220;
+    private final Schema f9230;
+    private final Schema f9240;
+    private final Schema f9250;
+    private final Schema f9260;
+    private final Schema f9270;
+    private final Schema f9280;
+    private final Schema f9290;
+    private final Schema f9300;
+    private final Schema f9310;
+    private final Schema f9320;
+    private final Schema f9330;
+    private final Schema f9340;
+    private final Schema f9350;
+    private final Schema f9360;
+    private final Schema f9370;
+    private final Schema f9380;
+    private final Schema f9390;
+    private final Schema f9400;
+    private final Schema f9410;
+    private final Schema f9420;
+    private final Schema f9430;
+    private final Schema f9440;
+    private final Schema f9450;
+    private final Schema f9460;
+    private final Schema f9470;
+    private final Schema f9480;
+    private final Schema f9490;
+    private final Schema f9500;
+    private final Schema f9510;
+    private final Schema f9520;
+    private final Schema f9530;
+    private final Schema f9540;
+    private final Schema f9550;
+    private final Schema f9560;
+    private final Schema f9570;
+    private final Schema f9580;
+    private final Schema f9590;
+    private final Schema f9600;
+    private final Schema f9610;
+    private final Schema f9620;
+    private final Schema f9630;
+    private final Schema f9640;
+    private final Schema f9650;
+    private final Schema f9660;
+    private final Schema f9670;
+    private final Schema f9680;
+    private final Schema f9690;
+    private final Schema f9700;
+    private final Schema f9710;
+    private final Schema f9720;
+    private final Schema f9730;
+    private final Schema f9740;
+    private final Schema f9750;
+    private final Schema f9760;
+    private final Schema f9770;
+    private final Schema f9780;
+    private final Schema f9790;
+    private final Schema f9800;
+    private final Schema f9810;
+    private final Schema f9820;
+    private final Schema f9830;
+    private final Schema f9840;
+    private final Schema f9850;
+    private final Schema f9860;
+    private final Schema f9870;
+    private final Schema f9880;
+    private final Schema f9890;
+    private final Schema f9900;
+    private final Schema f9910;
+    private final Schema f9920;
+    private final Schema f9930;
+    private final Schema f9940;
+    private final Schema f9950;
+    private final Schema f9960;
+    private final Schema f9970;
+    private final Schema f9980;
+    private final Schema f9990;
+
+    public FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.f00 = readerSchema.getField("F0").schema();
+        this.f10 = readerSchema.getField("F1").schema();
+        this.f20 = readerSchema.getField("F2").schema();
+        this.f30 = readerSchema.getField("F3").schema();
+        this.f40 = readerSchema.getField("F4").schema();
+        this.f50 = readerSchema.getField("F5").schema();
+        this.f60 = readerSchema.getField("F6").schema();
+        this.f70 = readerSchema.getField("F7").schema();
+        this.f80 = readerSchema.getField("F8").schema();
+        this.f90 = readerSchema.getField("F9").schema();
+        this.f100 = readerSchema.getField("F10").schema();
+        this.f110 = readerSchema.getField("F11").schema();
+        this.f120 = readerSchema.getField("F12").schema();
+        this.f130 = readerSchema.getField("F13").schema();
+        this.f140 = readerSchema.getField("F14").schema();
+        this.f150 = readerSchema.getField("F15").schema();
+        this.f160 = readerSchema.getField("F16").schema();
+        this.f170 = readerSchema.getField("F17").schema();
+        this.f180 = readerSchema.getField("F18").schema();
+        this.f190 = readerSchema.getField("F19").schema();
+        this.f200 = readerSchema.getField("F20").schema();
+        this.f210 = readerSchema.getField("F21").schema();
+        this.f220 = readerSchema.getField("F22").schema();
+        this.f230 = readerSchema.getField("F23").schema();
+        this.f240 = readerSchema.getField("F24").schema();
+        this.f250 = readerSchema.getField("F25").schema();
+        this.f260 = readerSchema.getField("F26").schema();
+        this.f270 = readerSchema.getField("F27").schema();
+        this.f280 = readerSchema.getField("F28").schema();
+        this.f290 = readerSchema.getField("F29").schema();
+        this.f300 = readerSchema.getField("F30").schema();
+        this.f310 = readerSchema.getField("F31").schema();
+        this.f320 = readerSchema.getField("F32").schema();
+        this.f330 = readerSchema.getField("F33").schema();
+        this.f340 = readerSchema.getField("F34").schema();
+        this.f350 = readerSchema.getField("F35").schema();
+        this.f360 = readerSchema.getField("F36").schema();
+        this.f370 = readerSchema.getField("F37").schema();
+        this.f380 = readerSchema.getField("F38").schema();
+        this.f390 = readerSchema.getField("F39").schema();
+        this.f400 = readerSchema.getField("F40").schema();
+        this.f410 = readerSchema.getField("F41").schema();
+        this.f420 = readerSchema.getField("F42").schema();
+        this.f430 = readerSchema.getField("F43").schema();
+        this.f440 = readerSchema.getField("F44").schema();
+        this.f450 = readerSchema.getField("F45").schema();
+        this.f460 = readerSchema.getField("F46").schema();
+        this.f470 = readerSchema.getField("F47").schema();
+        this.f480 = readerSchema.getField("F48").schema();
+        this.f490 = readerSchema.getField("F49").schema();
+        this.f500 = readerSchema.getField("F50").schema();
+        this.f510 = readerSchema.getField("F51").schema();
+        this.f520 = readerSchema.getField("F52").schema();
+        this.f530 = readerSchema.getField("F53").schema();
+        this.f540 = readerSchema.getField("F54").schema();
+        this.f550 = readerSchema.getField("F55").schema();
+        this.f560 = readerSchema.getField("F56").schema();
+        this.f570 = readerSchema.getField("F57").schema();
+        this.f580 = readerSchema.getField("F58").schema();
+        this.f590 = readerSchema.getField("F59").schema();
+        this.f600 = readerSchema.getField("F60").schema();
+        this.f610 = readerSchema.getField("F61").schema();
+        this.f620 = readerSchema.getField("F62").schema();
+        this.f630 = readerSchema.getField("F63").schema();
+        this.f640 = readerSchema.getField("F64").schema();
+        this.f650 = readerSchema.getField("F65").schema();
+        this.f660 = readerSchema.getField("F66").schema();
+        this.f670 = readerSchema.getField("F67").schema();
+        this.f680 = readerSchema.getField("F68").schema();
+        this.f690 = readerSchema.getField("F69").schema();
+        this.f700 = readerSchema.getField("F70").schema();
+        this.f710 = readerSchema.getField("F71").schema();
+        this.f720 = readerSchema.getField("F72").schema();
+        this.f730 = readerSchema.getField("F73").schema();
+        this.f740 = readerSchema.getField("F74").schema();
+        this.f750 = readerSchema.getField("F75").schema();
+        this.f760 = readerSchema.getField("F76").schema();
+        this.f770 = readerSchema.getField("F77").schema();
+        this.f780 = readerSchema.getField("F78").schema();
+        this.f790 = readerSchema.getField("F79").schema();
+        this.f800 = readerSchema.getField("F80").schema();
+        this.f810 = readerSchema.getField("F81").schema();
+        this.f820 = readerSchema.getField("F82").schema();
+        this.f830 = readerSchema.getField("F83").schema();
+        this.f840 = readerSchema.getField("F84").schema();
+        this.f850 = readerSchema.getField("F85").schema();
+        this.f860 = readerSchema.getField("F86").schema();
+        this.f870 = readerSchema.getField("F87").schema();
+        this.f880 = readerSchema.getField("F88").schema();
+        this.f890 = readerSchema.getField("F89").schema();
+        this.f900 = readerSchema.getField("F90").schema();
+        this.f910 = readerSchema.getField("F91").schema();
+        this.f920 = readerSchema.getField("F92").schema();
+        this.f930 = readerSchema.getField("F93").schema();
+        this.f940 = readerSchema.getField("F94").schema();
+        this.f950 = readerSchema.getField("F95").schema();
+        this.f960 = readerSchema.getField("F96").schema();
+        this.f970 = readerSchema.getField("F97").schema();
+        this.f980 = readerSchema.getField("F98").schema();
+        this.f990 = readerSchema.getField("F99").schema();
+        this.f1000 = readerSchema.getField("F100").schema();
+        this.f1010 = readerSchema.getField("F101").schema();
+        this.f1020 = readerSchema.getField("F102").schema();
+        this.f1030 = readerSchema.getField("F103").schema();
+        this.f1040 = readerSchema.getField("F104").schema();
+        this.f1050 = readerSchema.getField("F105").schema();
+        this.f1060 = readerSchema.getField("F106").schema();
+        this.f1070 = readerSchema.getField("F107").schema();
+        this.f1080 = readerSchema.getField("F108").schema();
+        this.f1090 = readerSchema.getField("F109").schema();
+        this.f1100 = readerSchema.getField("F110").schema();
+        this.f1110 = readerSchema.getField("F111").schema();
+        this.f1120 = readerSchema.getField("F112").schema();
+        this.f1130 = readerSchema.getField("F113").schema();
+        this.f1140 = readerSchema.getField("F114").schema();
+        this.f1150 = readerSchema.getField("F115").schema();
+        this.f1160 = readerSchema.getField("F116").schema();
+        this.f1170 = readerSchema.getField("F117").schema();
+        this.f1180 = readerSchema.getField("F118").schema();
+        this.f1190 = readerSchema.getField("F119").schema();
+        this.f1200 = readerSchema.getField("F120").schema();
+        this.f1210 = readerSchema.getField("F121").schema();
+        this.f1220 = readerSchema.getField("F122").schema();
+        this.f1230 = readerSchema.getField("F123").schema();
+        this.f1240 = readerSchema.getField("F124").schema();
+        this.f1250 = readerSchema.getField("F125").schema();
+        this.f1260 = readerSchema.getField("F126").schema();
+        this.f1270 = readerSchema.getField("F127").schema();
+        this.f1280 = readerSchema.getField("F128").schema();
+        this.f1290 = readerSchema.getField("F129").schema();
+        this.f1300 = readerSchema.getField("F130").schema();
+        this.f1310 = readerSchema.getField("F131").schema();
+        this.f1320 = readerSchema.getField("F132").schema();
+        this.f1330 = readerSchema.getField("F133").schema();
+        this.f1340 = readerSchema.getField("F134").schema();
+        this.f1350 = readerSchema.getField("F135").schema();
+        this.f1360 = readerSchema.getField("F136").schema();
+        this.f1370 = readerSchema.getField("F137").schema();
+        this.f1380 = readerSchema.getField("F138").schema();
+        this.f1390 = readerSchema.getField("F139").schema();
+        this.f1400 = readerSchema.getField("F140").schema();
+        this.f1410 = readerSchema.getField("F141").schema();
+        this.f1420 = readerSchema.getField("F142").schema();
+        this.f1430 = readerSchema.getField("F143").schema();
+        this.f1440 = readerSchema.getField("F144").schema();
+        this.f1450 = readerSchema.getField("F145").schema();
+        this.f1460 = readerSchema.getField("F146").schema();
+        this.f1470 = readerSchema.getField("F147").schema();
+        this.f1480 = readerSchema.getField("F148").schema();
+        this.f1490 = readerSchema.getField("F149").schema();
+        this.f1500 = readerSchema.getField("F150").schema();
+        this.f1510 = readerSchema.getField("F151").schema();
+        this.f1520 = readerSchema.getField("F152").schema();
+        this.f1530 = readerSchema.getField("F153").schema();
+        this.f1540 = readerSchema.getField("F154").schema();
+        this.f1550 = readerSchema.getField("F155").schema();
+        this.f1560 = readerSchema.getField("F156").schema();
+        this.f1570 = readerSchema.getField("F157").schema();
+        this.f1580 = readerSchema.getField("F158").schema();
+        this.f1590 = readerSchema.getField("F159").schema();
+        this.f1600 = readerSchema.getField("F160").schema();
+        this.f1610 = readerSchema.getField("F161").schema();
+        this.f1620 = readerSchema.getField("F162").schema();
+        this.f1630 = readerSchema.getField("F163").schema();
+        this.f1640 = readerSchema.getField("F164").schema();
+        this.f1650 = readerSchema.getField("F165").schema();
+        this.f1660 = readerSchema.getField("F166").schema();
+        this.f1670 = readerSchema.getField("F167").schema();
+        this.f1680 = readerSchema.getField("F168").schema();
+        this.f1690 = readerSchema.getField("F169").schema();
+        this.f1700 = readerSchema.getField("F170").schema();
+        this.f1710 = readerSchema.getField("F171").schema();
+        this.f1720 = readerSchema.getField("F172").schema();
+        this.f1730 = readerSchema.getField("F173").schema();
+        this.f1740 = readerSchema.getField("F174").schema();
+        this.f1750 = readerSchema.getField("F175").schema();
+        this.f1760 = readerSchema.getField("F176").schema();
+        this.f1770 = readerSchema.getField("F177").schema();
+        this.f1780 = readerSchema.getField("F178").schema();
+        this.f1790 = readerSchema.getField("F179").schema();
+        this.f1800 = readerSchema.getField("F180").schema();
+        this.f1810 = readerSchema.getField("F181").schema();
+        this.f1820 = readerSchema.getField("F182").schema();
+        this.f1830 = readerSchema.getField("F183").schema();
+        this.f1840 = readerSchema.getField("F184").schema();
+        this.f1850 = readerSchema.getField("F185").schema();
+        this.f1860 = readerSchema.getField("F186").schema();
+        this.f1870 = readerSchema.getField("F187").schema();
+        this.f1880 = readerSchema.getField("F188").schema();
+        this.f1890 = readerSchema.getField("F189").schema();
+        this.f1900 = readerSchema.getField("F190").schema();
+        this.f1910 = readerSchema.getField("F191").schema();
+        this.f1920 = readerSchema.getField("F192").schema();
+        this.f1930 = readerSchema.getField("F193").schema();
+        this.f1940 = readerSchema.getField("F194").schema();
+        this.f1950 = readerSchema.getField("F195").schema();
+        this.f1960 = readerSchema.getField("F196").schema();
+        this.f1970 = readerSchema.getField("F197").schema();
+        this.f1980 = readerSchema.getField("F198").schema();
+        this.f1990 = readerSchema.getField("F199").schema();
+        this.f2000 = readerSchema.getField("F200").schema();
+        this.f2010 = readerSchema.getField("F201").schema();
+        this.f2020 = readerSchema.getField("F202").schema();
+        this.f2030 = readerSchema.getField("F203").schema();
+        this.f2040 = readerSchema.getField("F204").schema();
+        this.f2050 = readerSchema.getField("F205").schema();
+        this.f2060 = readerSchema.getField("F206").schema();
+        this.f2070 = readerSchema.getField("F207").schema();
+        this.f2080 = readerSchema.getField("F208").schema();
+        this.f2090 = readerSchema.getField("F209").schema();
+        this.f2100 = readerSchema.getField("F210").schema();
+        this.f2110 = readerSchema.getField("F211").schema();
+        this.f2120 = readerSchema.getField("F212").schema();
+        this.f2130 = readerSchema.getField("F213").schema();
+        this.f2140 = readerSchema.getField("F214").schema();
+        this.f2150 = readerSchema.getField("F215").schema();
+        this.f2160 = readerSchema.getField("F216").schema();
+        this.f2170 = readerSchema.getField("F217").schema();
+        this.f2180 = readerSchema.getField("F218").schema();
+        this.f2190 = readerSchema.getField("F219").schema();
+        this.f2200 = readerSchema.getField("F220").schema();
+        this.f2210 = readerSchema.getField("F221").schema();
+        this.f2220 = readerSchema.getField("F222").schema();
+        this.f2230 = readerSchema.getField("F223").schema();
+        this.f2240 = readerSchema.getField("F224").schema();
+        this.f2250 = readerSchema.getField("F225").schema();
+        this.f2260 = readerSchema.getField("F226").schema();
+        this.f2270 = readerSchema.getField("F227").schema();
+        this.f2280 = readerSchema.getField("F228").schema();
+        this.f2290 = readerSchema.getField("F229").schema();
+        this.f2300 = readerSchema.getField("F230").schema();
+        this.f2310 = readerSchema.getField("F231").schema();
+        this.f2320 = readerSchema.getField("F232").schema();
+        this.f2330 = readerSchema.getField("F233").schema();
+        this.f2340 = readerSchema.getField("F234").schema();
+        this.f2350 = readerSchema.getField("F235").schema();
+        this.f2360 = readerSchema.getField("F236").schema();
+        this.f2370 = readerSchema.getField("F237").schema();
+        this.f2380 = readerSchema.getField("F238").schema();
+        this.f2390 = readerSchema.getField("F239").schema();
+        this.f2400 = readerSchema.getField("F240").schema();
+        this.f2410 = readerSchema.getField("F241").schema();
+        this.f2420 = readerSchema.getField("F242").schema();
+        this.f2430 = readerSchema.getField("F243").schema();
+        this.f2440 = readerSchema.getField("F244").schema();
+        this.f2450 = readerSchema.getField("F245").schema();
+        this.f2460 = readerSchema.getField("F246").schema();
+        this.f2470 = readerSchema.getField("F247").schema();
+        this.f2480 = readerSchema.getField("F248").schema();
+        this.f2490 = readerSchema.getField("F249").schema();
+        this.f2500 = readerSchema.getField("F250").schema();
+        this.f2510 = readerSchema.getField("F251").schema();
+        this.f2520 = readerSchema.getField("F252").schema();
+        this.f2530 = readerSchema.getField("F253").schema();
+        this.f2540 = readerSchema.getField("F254").schema();
+        this.f2550 = readerSchema.getField("F255").schema();
+        this.f2560 = readerSchema.getField("F256").schema();
+        this.f2570 = readerSchema.getField("F257").schema();
+        this.f2580 = readerSchema.getField("F258").schema();
+        this.f2590 = readerSchema.getField("F259").schema();
+        this.f2600 = readerSchema.getField("F260").schema();
+        this.f2610 = readerSchema.getField("F261").schema();
+        this.f2620 = readerSchema.getField("F262").schema();
+        this.f2630 = readerSchema.getField("F263").schema();
+        this.f2640 = readerSchema.getField("F264").schema();
+        this.f2650 = readerSchema.getField("F265").schema();
+        this.f2660 = readerSchema.getField("F266").schema();
+        this.f2670 = readerSchema.getField("F267").schema();
+        this.f2680 = readerSchema.getField("F268").schema();
+        this.f2690 = readerSchema.getField("F269").schema();
+        this.f2700 = readerSchema.getField("F270").schema();
+        this.f2710 = readerSchema.getField("F271").schema();
+        this.f2720 = readerSchema.getField("F272").schema();
+        this.f2730 = readerSchema.getField("F273").schema();
+        this.f2740 = readerSchema.getField("F274").schema();
+        this.f2750 = readerSchema.getField("F275").schema();
+        this.f2760 = readerSchema.getField("F276").schema();
+        this.f2770 = readerSchema.getField("F277").schema();
+        this.f2780 = readerSchema.getField("F278").schema();
+        this.f2790 = readerSchema.getField("F279").schema();
+        this.f2800 = readerSchema.getField("F280").schema();
+        this.f2810 = readerSchema.getField("F281").schema();
+        this.f2820 = readerSchema.getField("F282").schema();
+        this.f2830 = readerSchema.getField("F283").schema();
+        this.f2840 = readerSchema.getField("F284").schema();
+        this.f2850 = readerSchema.getField("F285").schema();
+        this.f2860 = readerSchema.getField("F286").schema();
+        this.f2870 = readerSchema.getField("F287").schema();
+        this.f2880 = readerSchema.getField("F288").schema();
+        this.f2890 = readerSchema.getField("F289").schema();
+        this.f2900 = readerSchema.getField("F290").schema();
+        this.f2910 = readerSchema.getField("F291").schema();
+        this.f2920 = readerSchema.getField("F292").schema();
+        this.f2930 = readerSchema.getField("F293").schema();
+        this.f2940 = readerSchema.getField("F294").schema();
+        this.f2950 = readerSchema.getField("F295").schema();
+        this.f2960 = readerSchema.getField("F296").schema();
+        this.f2970 = readerSchema.getField("F297").schema();
+        this.f2980 = readerSchema.getField("F298").schema();
+        this.f2990 = readerSchema.getField("F299").schema();
+        this.f3000 = readerSchema.getField("F300").schema();
+        this.f3010 = readerSchema.getField("F301").schema();
+        this.f3020 = readerSchema.getField("F302").schema();
+        this.f3030 = readerSchema.getField("F303").schema();
+        this.f3040 = readerSchema.getField("F304").schema();
+        this.f3050 = readerSchema.getField("F305").schema();
+        this.f3060 = readerSchema.getField("F306").schema();
+        this.f3070 = readerSchema.getField("F307").schema();
+        this.f3080 = readerSchema.getField("F308").schema();
+        this.f3090 = readerSchema.getField("F309").schema();
+        this.f3100 = readerSchema.getField("F310").schema();
+        this.f3110 = readerSchema.getField("F311").schema();
+        this.f3120 = readerSchema.getField("F312").schema();
+        this.f3130 = readerSchema.getField("F313").schema();
+        this.f3140 = readerSchema.getField("F314").schema();
+        this.f3150 = readerSchema.getField("F315").schema();
+        this.f3160 = readerSchema.getField("F316").schema();
+        this.f3170 = readerSchema.getField("F317").schema();
+        this.f3180 = readerSchema.getField("F318").schema();
+        this.f3190 = readerSchema.getField("F319").schema();
+        this.f3200 = readerSchema.getField("F320").schema();
+        this.f3210 = readerSchema.getField("F321").schema();
+        this.f3220 = readerSchema.getField("F322").schema();
+        this.f3230 = readerSchema.getField("F323").schema();
+        this.f3240 = readerSchema.getField("F324").schema();
+        this.f3250 = readerSchema.getField("F325").schema();
+        this.f3260 = readerSchema.getField("F326").schema();
+        this.f3270 = readerSchema.getField("F327").schema();
+        this.f3280 = readerSchema.getField("F328").schema();
+        this.f3290 = readerSchema.getField("F329").schema();
+        this.f3300 = readerSchema.getField("F330").schema();
+        this.f3310 = readerSchema.getField("F331").schema();
+        this.f3320 = readerSchema.getField("F332").schema();
+        this.f3330 = readerSchema.getField("F333").schema();
+        this.f3340 = readerSchema.getField("F334").schema();
+        this.f3350 = readerSchema.getField("F335").schema();
+        this.f3360 = readerSchema.getField("F336").schema();
+        this.f3370 = readerSchema.getField("F337").schema();
+        this.f3380 = readerSchema.getField("F338").schema();
+        this.f3390 = readerSchema.getField("F339").schema();
+        this.f3400 = readerSchema.getField("F340").schema();
+        this.f3410 = readerSchema.getField("F341").schema();
+        this.f3420 = readerSchema.getField("F342").schema();
+        this.f3430 = readerSchema.getField("F343").schema();
+        this.f3440 = readerSchema.getField("F344").schema();
+        this.f3450 = readerSchema.getField("F345").schema();
+        this.f3460 = readerSchema.getField("F346").schema();
+        this.f3470 = readerSchema.getField("F347").schema();
+        this.f3480 = readerSchema.getField("F348").schema();
+        this.f3490 = readerSchema.getField("F349").schema();
+        this.f3500 = readerSchema.getField("F350").schema();
+        this.f3510 = readerSchema.getField("F351").schema();
+        this.f3520 = readerSchema.getField("F352").schema();
+        this.f3530 = readerSchema.getField("F353").schema();
+        this.f3540 = readerSchema.getField("F354").schema();
+        this.f3550 = readerSchema.getField("F355").schema();
+        this.f3560 = readerSchema.getField("F356").schema();
+        this.f3570 = readerSchema.getField("F357").schema();
+        this.f3580 = readerSchema.getField("F358").schema();
+        this.f3590 = readerSchema.getField("F359").schema();
+        this.f3600 = readerSchema.getField("F360").schema();
+        this.f3610 = readerSchema.getField("F361").schema();
+        this.f3620 = readerSchema.getField("F362").schema();
+        this.f3630 = readerSchema.getField("F363").schema();
+        this.f3640 = readerSchema.getField("F364").schema();
+        this.f3650 = readerSchema.getField("F365").schema();
+        this.f3660 = readerSchema.getField("F366").schema();
+        this.f3670 = readerSchema.getField("F367").schema();
+        this.f3680 = readerSchema.getField("F368").schema();
+        this.f3690 = readerSchema.getField("F369").schema();
+        this.f3700 = readerSchema.getField("F370").schema();
+        this.f3710 = readerSchema.getField("F371").schema();
+        this.f3720 = readerSchema.getField("F372").schema();
+        this.f3730 = readerSchema.getField("F373").schema();
+        this.f3740 = readerSchema.getField("F374").schema();
+        this.f3750 = readerSchema.getField("F375").schema();
+        this.f3760 = readerSchema.getField("F376").schema();
+        this.f3770 = readerSchema.getField("F377").schema();
+        this.f3780 = readerSchema.getField("F378").schema();
+        this.f3790 = readerSchema.getField("F379").schema();
+        this.f3800 = readerSchema.getField("F380").schema();
+        this.f3810 = readerSchema.getField("F381").schema();
+        this.f3820 = readerSchema.getField("F382").schema();
+        this.f3830 = readerSchema.getField("F383").schema();
+        this.f3840 = readerSchema.getField("F384").schema();
+        this.f3850 = readerSchema.getField("F385").schema();
+        this.f3860 = readerSchema.getField("F386").schema();
+        this.f3870 = readerSchema.getField("F387").schema();
+        this.f3880 = readerSchema.getField("F388").schema();
+        this.f3890 = readerSchema.getField("F389").schema();
+        this.f3900 = readerSchema.getField("F390").schema();
+        this.f3910 = readerSchema.getField("F391").schema();
+        this.f3920 = readerSchema.getField("F392").schema();
+        this.f3930 = readerSchema.getField("F393").schema();
+        this.f3940 = readerSchema.getField("F394").schema();
+        this.f3950 = readerSchema.getField("F395").schema();
+        this.f3960 = readerSchema.getField("F396").schema();
+        this.f3970 = readerSchema.getField("F397").schema();
+        this.f3980 = readerSchema.getField("F398").schema();
+        this.f3990 = readerSchema.getField("F399").schema();
+        this.f4000 = readerSchema.getField("F400").schema();
+        this.f4010 = readerSchema.getField("F401").schema();
+        this.f4020 = readerSchema.getField("F402").schema();
+        this.f4030 = readerSchema.getField("F403").schema();
+        this.f4040 = readerSchema.getField("F404").schema();
+        this.f4050 = readerSchema.getField("F405").schema();
+        this.f4060 = readerSchema.getField("F406").schema();
+        this.f4070 = readerSchema.getField("F407").schema();
+        this.f4080 = readerSchema.getField("F408").schema();
+        this.f4090 = readerSchema.getField("F409").schema();
+        this.f4100 = readerSchema.getField("F410").schema();
+        this.f4110 = readerSchema.getField("F411").schema();
+        this.f4120 = readerSchema.getField("F412").schema();
+        this.f4130 = readerSchema.getField("F413").schema();
+        this.f4140 = readerSchema.getField("F414").schema();
+        this.f4150 = readerSchema.getField("F415").schema();
+        this.f4160 = readerSchema.getField("F416").schema();
+        this.f4170 = readerSchema.getField("F417").schema();
+        this.f4180 = readerSchema.getField("F418").schema();
+        this.f4190 = readerSchema.getField("F419").schema();
+        this.f4200 = readerSchema.getField("F420").schema();
+        this.f4210 = readerSchema.getField("F421").schema();
+        this.f4220 = readerSchema.getField("F422").schema();
+        this.f4230 = readerSchema.getField("F423").schema();
+        this.f4240 = readerSchema.getField("F424").schema();
+        this.f4250 = readerSchema.getField("F425").schema();
+        this.f4260 = readerSchema.getField("F426").schema();
+        this.f4270 = readerSchema.getField("F427").schema();
+        this.f4280 = readerSchema.getField("F428").schema();
+        this.f4290 = readerSchema.getField("F429").schema();
+        this.f4300 = readerSchema.getField("F430").schema();
+        this.f4310 = readerSchema.getField("F431").schema();
+        this.f4320 = readerSchema.getField("F432").schema();
+        this.f4330 = readerSchema.getField("F433").schema();
+        this.f4340 = readerSchema.getField("F434").schema();
+        this.f4350 = readerSchema.getField("F435").schema();
+        this.f4360 = readerSchema.getField("F436").schema();
+        this.f4370 = readerSchema.getField("F437").schema();
+        this.f4380 = readerSchema.getField("F438").schema();
+        this.f4390 = readerSchema.getField("F439").schema();
+        this.f4400 = readerSchema.getField("F440").schema();
+        this.f4410 = readerSchema.getField("F441").schema();
+        this.f4420 = readerSchema.getField("F442").schema();
+        this.f4430 = readerSchema.getField("F443").schema();
+        this.f4440 = readerSchema.getField("F444").schema();
+        this.f4450 = readerSchema.getField("F445").schema();
+        this.f4460 = readerSchema.getField("F446").schema();
+        this.f4470 = readerSchema.getField("F447").schema();
+        this.f4480 = readerSchema.getField("F448").schema();
+        this.f4490 = readerSchema.getField("F449").schema();
+        this.f4500 = readerSchema.getField("F450").schema();
+        this.f4510 = readerSchema.getField("F451").schema();
+        this.f4520 = readerSchema.getField("F452").schema();
+        this.f4530 = readerSchema.getField("F453").schema();
+        this.f4540 = readerSchema.getField("F454").schema();
+        this.f4550 = readerSchema.getField("F455").schema();
+        this.f4560 = readerSchema.getField("F456").schema();
+        this.f4570 = readerSchema.getField("F457").schema();
+        this.f4580 = readerSchema.getField("F458").schema();
+        this.f4590 = readerSchema.getField("F459").schema();
+        this.f4600 = readerSchema.getField("F460").schema();
+        this.f4610 = readerSchema.getField("F461").schema();
+        this.f4620 = readerSchema.getField("F462").schema();
+        this.f4630 = readerSchema.getField("F463").schema();
+        this.f4640 = readerSchema.getField("F464").schema();
+        this.f4650 = readerSchema.getField("F465").schema();
+        this.f4660 = readerSchema.getField("F466").schema();
+        this.f4670 = readerSchema.getField("F467").schema();
+        this.f4680 = readerSchema.getField("F468").schema();
+        this.f4690 = readerSchema.getField("F469").schema();
+        this.f4700 = readerSchema.getField("F470").schema();
+        this.f4710 = readerSchema.getField("F471").schema();
+        this.f4720 = readerSchema.getField("F472").schema();
+        this.f4730 = readerSchema.getField("F473").schema();
+        this.f4740 = readerSchema.getField("F474").schema();
+        this.f4750 = readerSchema.getField("F475").schema();
+        this.f4760 = readerSchema.getField("F476").schema();
+        this.f4770 = readerSchema.getField("F477").schema();
+        this.f4780 = readerSchema.getField("F478").schema();
+        this.f4790 = readerSchema.getField("F479").schema();
+        this.f4800 = readerSchema.getField("F480").schema();
+        this.f4810 = readerSchema.getField("F481").schema();
+        this.f4820 = readerSchema.getField("F482").schema();
+        this.f4830 = readerSchema.getField("F483").schema();
+        this.f4840 = readerSchema.getField("F484").schema();
+        this.f4850 = readerSchema.getField("F485").schema();
+        this.f4860 = readerSchema.getField("F486").schema();
+        this.f4870 = readerSchema.getField("F487").schema();
+        this.f4880 = readerSchema.getField("F488").schema();
+        this.f4890 = readerSchema.getField("F489").schema();
+        this.f4900 = readerSchema.getField("F490").schema();
+        this.f4910 = readerSchema.getField("F491").schema();
+        this.f4920 = readerSchema.getField("F492").schema();
+        this.f4930 = readerSchema.getField("F493").schema();
+        this.f4940 = readerSchema.getField("F494").schema();
+        this.f4950 = readerSchema.getField("F495").schema();
+        this.f4960 = readerSchema.getField("F496").schema();
+        this.f4970 = readerSchema.getField("F497").schema();
+        this.f4980 = readerSchema.getField("F498").schema();
+        this.f4990 = readerSchema.getField("F499").schema();
+        this.f5000 = readerSchema.getField("F500").schema();
+        this.f5010 = readerSchema.getField("F501").schema();
+        this.f5020 = readerSchema.getField("F502").schema();
+        this.f5030 = readerSchema.getField("F503").schema();
+        this.f5040 = readerSchema.getField("F504").schema();
+        this.f5050 = readerSchema.getField("F505").schema();
+        this.f5060 = readerSchema.getField("F506").schema();
+        this.f5070 = readerSchema.getField("F507").schema();
+        this.f5080 = readerSchema.getField("F508").schema();
+        this.f5090 = readerSchema.getField("F509").schema();
+        this.f5100 = readerSchema.getField("F510").schema();
+        this.f5110 = readerSchema.getField("F511").schema();
+        this.f5120 = readerSchema.getField("F512").schema();
+        this.f5130 = readerSchema.getField("F513").schema();
+        this.f5140 = readerSchema.getField("F514").schema();
+        this.f5150 = readerSchema.getField("F515").schema();
+        this.f5160 = readerSchema.getField("F516").schema();
+        this.f5170 = readerSchema.getField("F517").schema();
+        this.f5180 = readerSchema.getField("F518").schema();
+        this.f5190 = readerSchema.getField("F519").schema();
+        this.f5200 = readerSchema.getField("F520").schema();
+        this.f5210 = readerSchema.getField("F521").schema();
+        this.f5220 = readerSchema.getField("F522").schema();
+        this.f5230 = readerSchema.getField("F523").schema();
+        this.f5240 = readerSchema.getField("F524").schema();
+        this.f5250 = readerSchema.getField("F525").schema();
+        this.f5260 = readerSchema.getField("F526").schema();
+        this.f5270 = readerSchema.getField("F527").schema();
+        this.f5280 = readerSchema.getField("F528").schema();
+        this.f5290 = readerSchema.getField("F529").schema();
+        this.f5300 = readerSchema.getField("F530").schema();
+        this.f5310 = readerSchema.getField("F531").schema();
+        this.f5320 = readerSchema.getField("F532").schema();
+        this.f5330 = readerSchema.getField("F533").schema();
+        this.f5340 = readerSchema.getField("F534").schema();
+        this.f5350 = readerSchema.getField("F535").schema();
+        this.f5360 = readerSchema.getField("F536").schema();
+        this.f5370 = readerSchema.getField("F537").schema();
+        this.f5380 = readerSchema.getField("F538").schema();
+        this.f5390 = readerSchema.getField("F539").schema();
+        this.f5400 = readerSchema.getField("F540").schema();
+        this.f5410 = readerSchema.getField("F541").schema();
+        this.f5420 = readerSchema.getField("F542").schema();
+        this.f5430 = readerSchema.getField("F543").schema();
+        this.f5440 = readerSchema.getField("F544").schema();
+        this.f5450 = readerSchema.getField("F545").schema();
+        this.f5460 = readerSchema.getField("F546").schema();
+        this.f5470 = readerSchema.getField("F547").schema();
+        this.f5480 = readerSchema.getField("F548").schema();
+        this.f5490 = readerSchema.getField("F549").schema();
+        this.f5500 = readerSchema.getField("F550").schema();
+        this.f5510 = readerSchema.getField("F551").schema();
+        this.f5520 = readerSchema.getField("F552").schema();
+        this.f5530 = readerSchema.getField("F553").schema();
+        this.f5540 = readerSchema.getField("F554").schema();
+        this.f5550 = readerSchema.getField("F555").schema();
+        this.f5560 = readerSchema.getField("F556").schema();
+        this.f5570 = readerSchema.getField("F557").schema();
+        this.f5580 = readerSchema.getField("F558").schema();
+        this.f5590 = readerSchema.getField("F559").schema();
+        this.f5600 = readerSchema.getField("F560").schema();
+        this.f5610 = readerSchema.getField("F561").schema();
+        this.f5620 = readerSchema.getField("F562").schema();
+        this.f5630 = readerSchema.getField("F563").schema();
+        this.f5640 = readerSchema.getField("F564").schema();
+        this.f5650 = readerSchema.getField("F565").schema();
+        this.f5660 = readerSchema.getField("F566").schema();
+        this.f5670 = readerSchema.getField("F567").schema();
+        this.f5680 = readerSchema.getField("F568").schema();
+        this.f5690 = readerSchema.getField("F569").schema();
+        this.f5700 = readerSchema.getField("F570").schema();
+        this.f5710 = readerSchema.getField("F571").schema();
+        this.f5720 = readerSchema.getField("F572").schema();
+        this.f5730 = readerSchema.getField("F573").schema();
+        this.f5740 = readerSchema.getField("F574").schema();
+        this.f5750 = readerSchema.getField("F575").schema();
+        this.f5760 = readerSchema.getField("F576").schema();
+        this.f5770 = readerSchema.getField("F577").schema();
+        this.f5780 = readerSchema.getField("F578").schema();
+        this.f5790 = readerSchema.getField("F579").schema();
+        this.f5800 = readerSchema.getField("F580").schema();
+        this.f5810 = readerSchema.getField("F581").schema();
+        this.f5820 = readerSchema.getField("F582").schema();
+        this.f5830 = readerSchema.getField("F583").schema();
+        this.f5840 = readerSchema.getField("F584").schema();
+        this.f5850 = readerSchema.getField("F585").schema();
+        this.f5860 = readerSchema.getField("F586").schema();
+        this.f5870 = readerSchema.getField("F587").schema();
+        this.f5880 = readerSchema.getField("F588").schema();
+        this.f5890 = readerSchema.getField("F589").schema();
+        this.f5900 = readerSchema.getField("F590").schema();
+        this.f5910 = readerSchema.getField("F591").schema();
+        this.f5920 = readerSchema.getField("F592").schema();
+        this.f5930 = readerSchema.getField("F593").schema();
+        this.f5940 = readerSchema.getField("F594").schema();
+        this.f5950 = readerSchema.getField("F595").schema();
+        this.f5960 = readerSchema.getField("F596").schema();
+        this.f5970 = readerSchema.getField("F597").schema();
+        this.f5980 = readerSchema.getField("F598").schema();
+        this.f5990 = readerSchema.getField("F599").schema();
+        this.f6000 = readerSchema.getField("F600").schema();
+        this.f6010 = readerSchema.getField("F601").schema();
+        this.f6020 = readerSchema.getField("F602").schema();
+        this.f6030 = readerSchema.getField("F603").schema();
+        this.f6040 = readerSchema.getField("F604").schema();
+        this.f6050 = readerSchema.getField("F605").schema();
+        this.f6060 = readerSchema.getField("F606").schema();
+        this.f6070 = readerSchema.getField("F607").schema();
+        this.f6080 = readerSchema.getField("F608").schema();
+        this.f6090 = readerSchema.getField("F609").schema();
+        this.f6100 = readerSchema.getField("F610").schema();
+        this.f6110 = readerSchema.getField("F611").schema();
+        this.f6120 = readerSchema.getField("F612").schema();
+        this.f6130 = readerSchema.getField("F613").schema();
+        this.f6140 = readerSchema.getField("F614").schema();
+        this.f6150 = readerSchema.getField("F615").schema();
+        this.f6160 = readerSchema.getField("F616").schema();
+        this.f6170 = readerSchema.getField("F617").schema();
+        this.f6180 = readerSchema.getField("F618").schema();
+        this.f6190 = readerSchema.getField("F619").schema();
+        this.f6200 = readerSchema.getField("F620").schema();
+        this.f6210 = readerSchema.getField("F621").schema();
+        this.f6220 = readerSchema.getField("F622").schema();
+        this.f6230 = readerSchema.getField("F623").schema();
+        this.f6240 = readerSchema.getField("F624").schema();
+        this.f6250 = readerSchema.getField("F625").schema();
+        this.f6260 = readerSchema.getField("F626").schema();
+        this.f6270 = readerSchema.getField("F627").schema();
+        this.f6280 = readerSchema.getField("F628").schema();
+        this.f6290 = readerSchema.getField("F629").schema();
+        this.f6300 = readerSchema.getField("F630").schema();
+        this.f6310 = readerSchema.getField("F631").schema();
+        this.f6320 = readerSchema.getField("F632").schema();
+        this.f6330 = readerSchema.getField("F633").schema();
+        this.f6340 = readerSchema.getField("F634").schema();
+        this.f6350 = readerSchema.getField("F635").schema();
+        this.f6360 = readerSchema.getField("F636").schema();
+        this.f6370 = readerSchema.getField("F637").schema();
+        this.f6380 = readerSchema.getField("F638").schema();
+        this.f6390 = readerSchema.getField("F639").schema();
+        this.f6400 = readerSchema.getField("F640").schema();
+        this.f6410 = readerSchema.getField("F641").schema();
+        this.f6420 = readerSchema.getField("F642").schema();
+        this.f6430 = readerSchema.getField("F643").schema();
+        this.f6440 = readerSchema.getField("F644").schema();
+        this.f6450 = readerSchema.getField("F645").schema();
+        this.f6460 = readerSchema.getField("F646").schema();
+        this.f6470 = readerSchema.getField("F647").schema();
+        this.f6480 = readerSchema.getField("F648").schema();
+        this.f6490 = readerSchema.getField("F649").schema();
+        this.f6500 = readerSchema.getField("F650").schema();
+        this.f6510 = readerSchema.getField("F651").schema();
+        this.f6520 = readerSchema.getField("F652").schema();
+        this.f6530 = readerSchema.getField("F653").schema();
+        this.f6540 = readerSchema.getField("F654").schema();
+        this.f6550 = readerSchema.getField("F655").schema();
+        this.f6560 = readerSchema.getField("F656").schema();
+        this.f6570 = readerSchema.getField("F657").schema();
+        this.f6580 = readerSchema.getField("F658").schema();
+        this.f6590 = readerSchema.getField("F659").schema();
+        this.f6600 = readerSchema.getField("F660").schema();
+        this.f6610 = readerSchema.getField("F661").schema();
+        this.f6620 = readerSchema.getField("F662").schema();
+        this.f6630 = readerSchema.getField("F663").schema();
+        this.f6640 = readerSchema.getField("F664").schema();
+        this.f6650 = readerSchema.getField("F665").schema();
+        this.f6660 = readerSchema.getField("F666").schema();
+        this.f6670 = readerSchema.getField("F667").schema();
+        this.f6680 = readerSchema.getField("F668").schema();
+        this.f6690 = readerSchema.getField("F669").schema();
+        this.f6700 = readerSchema.getField("F670").schema();
+        this.f6710 = readerSchema.getField("F671").schema();
+        this.f6720 = readerSchema.getField("F672").schema();
+        this.f6730 = readerSchema.getField("F673").schema();
+        this.f6740 = readerSchema.getField("F674").schema();
+        this.f6750 = readerSchema.getField("F675").schema();
+        this.f6760 = readerSchema.getField("F676").schema();
+        this.f6770 = readerSchema.getField("F677").schema();
+        this.f6780 = readerSchema.getField("F678").schema();
+        this.f6790 = readerSchema.getField("F679").schema();
+        this.f6800 = readerSchema.getField("F680").schema();
+        this.f6810 = readerSchema.getField("F681").schema();
+        this.f6820 = readerSchema.getField("F682").schema();
+        this.f6830 = readerSchema.getField("F683").schema();
+        this.f6840 = readerSchema.getField("F684").schema();
+        this.f6850 = readerSchema.getField("F685").schema();
+        this.f6860 = readerSchema.getField("F686").schema();
+        this.f6870 = readerSchema.getField("F687").schema();
+        this.f6880 = readerSchema.getField("F688").schema();
+        this.f6890 = readerSchema.getField("F689").schema();
+        this.f6900 = readerSchema.getField("F690").schema();
+        this.f6910 = readerSchema.getField("F691").schema();
+        this.f6920 = readerSchema.getField("F692").schema();
+        this.f6930 = readerSchema.getField("F693").schema();
+        this.f6940 = readerSchema.getField("F694").schema();
+        this.f6950 = readerSchema.getField("F695").schema();
+        this.f6960 = readerSchema.getField("F696").schema();
+        this.f6970 = readerSchema.getField("F697").schema();
+        this.f6980 = readerSchema.getField("F698").schema();
+        this.f6990 = readerSchema.getField("F699").schema();
+        this.f7000 = readerSchema.getField("F700").schema();
+        this.f7010 = readerSchema.getField("F701").schema();
+        this.f7020 = readerSchema.getField("F702").schema();
+        this.f7030 = readerSchema.getField("F703").schema();
+        this.f7040 = readerSchema.getField("F704").schema();
+        this.f7050 = readerSchema.getField("F705").schema();
+        this.f7060 = readerSchema.getField("F706").schema();
+        this.f7070 = readerSchema.getField("F707").schema();
+        this.f7080 = readerSchema.getField("F708").schema();
+        this.f7090 = readerSchema.getField("F709").schema();
+        this.f7100 = readerSchema.getField("F710").schema();
+        this.f7110 = readerSchema.getField("F711").schema();
+        this.f7120 = readerSchema.getField("F712").schema();
+        this.f7130 = readerSchema.getField("F713").schema();
+        this.f7140 = readerSchema.getField("F714").schema();
+        this.f7150 = readerSchema.getField("F715").schema();
+        this.f7160 = readerSchema.getField("F716").schema();
+        this.f7170 = readerSchema.getField("F717").schema();
+        this.f7180 = readerSchema.getField("F718").schema();
+        this.f7190 = readerSchema.getField("F719").schema();
+        this.f7200 = readerSchema.getField("F720").schema();
+        this.f7210 = readerSchema.getField("F721").schema();
+        this.f7220 = readerSchema.getField("F722").schema();
+        this.f7230 = readerSchema.getField("F723").schema();
+        this.f7240 = readerSchema.getField("F724").schema();
+        this.f7250 = readerSchema.getField("F725").schema();
+        this.f7260 = readerSchema.getField("F726").schema();
+        this.f7270 = readerSchema.getField("F727").schema();
+        this.f7280 = readerSchema.getField("F728").schema();
+        this.f7290 = readerSchema.getField("F729").schema();
+        this.f7300 = readerSchema.getField("F730").schema();
+        this.f7310 = readerSchema.getField("F731").schema();
+        this.f7320 = readerSchema.getField("F732").schema();
+        this.f7330 = readerSchema.getField("F733").schema();
+        this.f7340 = readerSchema.getField("F734").schema();
+        this.f7350 = readerSchema.getField("F735").schema();
+        this.f7360 = readerSchema.getField("F736").schema();
+        this.f7370 = readerSchema.getField("F737").schema();
+        this.f7380 = readerSchema.getField("F738").schema();
+        this.f7390 = readerSchema.getField("F739").schema();
+        this.f7400 = readerSchema.getField("F740").schema();
+        this.f7410 = readerSchema.getField("F741").schema();
+        this.f7420 = readerSchema.getField("F742").schema();
+        this.f7430 = readerSchema.getField("F743").schema();
+        this.f7440 = readerSchema.getField("F744").schema();
+        this.f7450 = readerSchema.getField("F745").schema();
+        this.f7460 = readerSchema.getField("F746").schema();
+        this.f7470 = readerSchema.getField("F747").schema();
+        this.f7480 = readerSchema.getField("F748").schema();
+        this.f7490 = readerSchema.getField("F749").schema();
+        this.f7500 = readerSchema.getField("F750").schema();
+        this.f7510 = readerSchema.getField("F751").schema();
+        this.f7520 = readerSchema.getField("F752").schema();
+        this.f7530 = readerSchema.getField("F753").schema();
+        this.f7540 = readerSchema.getField("F754").schema();
+        this.f7550 = readerSchema.getField("F755").schema();
+        this.f7560 = readerSchema.getField("F756").schema();
+        this.f7570 = readerSchema.getField("F757").schema();
+        this.f7580 = readerSchema.getField("F758").schema();
+        this.f7590 = readerSchema.getField("F759").schema();
+        this.f7600 = readerSchema.getField("F760").schema();
+        this.f7610 = readerSchema.getField("F761").schema();
+        this.f7620 = readerSchema.getField("F762").schema();
+        this.f7630 = readerSchema.getField("F763").schema();
+        this.f7640 = readerSchema.getField("F764").schema();
+        this.f7650 = readerSchema.getField("F765").schema();
+        this.f7660 = readerSchema.getField("F766").schema();
+        this.f7670 = readerSchema.getField("F767").schema();
+        this.f7680 = readerSchema.getField("F768").schema();
+        this.f7690 = readerSchema.getField("F769").schema();
+        this.f7700 = readerSchema.getField("F770").schema();
+        this.f7710 = readerSchema.getField("F771").schema();
+        this.f7720 = readerSchema.getField("F772").schema();
+        this.f7730 = readerSchema.getField("F773").schema();
+        this.f7740 = readerSchema.getField("F774").schema();
+        this.f7750 = readerSchema.getField("F775").schema();
+        this.f7760 = readerSchema.getField("F776").schema();
+        this.f7770 = readerSchema.getField("F777").schema();
+        this.f7780 = readerSchema.getField("F778").schema();
+        this.f7790 = readerSchema.getField("F779").schema();
+        this.f7800 = readerSchema.getField("F780").schema();
+        this.f7810 = readerSchema.getField("F781").schema();
+        this.f7820 = readerSchema.getField("F782").schema();
+        this.f7830 = readerSchema.getField("F783").schema();
+        this.f7840 = readerSchema.getField("F784").schema();
+        this.f7850 = readerSchema.getField("F785").schema();
+        this.f7860 = readerSchema.getField("F786").schema();
+        this.f7870 = readerSchema.getField("F787").schema();
+        this.f7880 = readerSchema.getField("F788").schema();
+        this.f7890 = readerSchema.getField("F789").schema();
+        this.f7900 = readerSchema.getField("F790").schema();
+        this.f7910 = readerSchema.getField("F791").schema();
+        this.f7920 = readerSchema.getField("F792").schema();
+        this.f7930 = readerSchema.getField("F793").schema();
+        this.f7940 = readerSchema.getField("F794").schema();
+        this.f7950 = readerSchema.getField("F795").schema();
+        this.f7960 = readerSchema.getField("F796").schema();
+        this.f7970 = readerSchema.getField("F797").schema();
+        this.f7980 = readerSchema.getField("F798").schema();
+        this.f7990 = readerSchema.getField("F799").schema();
+        this.f8000 = readerSchema.getField("F800").schema();
+        this.f8010 = readerSchema.getField("F801").schema();
+        this.f8020 = readerSchema.getField("F802").schema();
+        this.f8030 = readerSchema.getField("F803").schema();
+        this.f8040 = readerSchema.getField("F804").schema();
+        this.f8050 = readerSchema.getField("F805").schema();
+        this.f8060 = readerSchema.getField("F806").schema();
+        this.f8070 = readerSchema.getField("F807").schema();
+        this.f8080 = readerSchema.getField("F808").schema();
+        this.f8090 = readerSchema.getField("F809").schema();
+        this.f8100 = readerSchema.getField("F810").schema();
+        this.f8110 = readerSchema.getField("F811").schema();
+        this.f8120 = readerSchema.getField("F812").schema();
+        this.f8130 = readerSchema.getField("F813").schema();
+        this.f8140 = readerSchema.getField("F814").schema();
+        this.f8150 = readerSchema.getField("F815").schema();
+        this.f8160 = readerSchema.getField("F816").schema();
+        this.f8170 = readerSchema.getField("F817").schema();
+        this.f8180 = readerSchema.getField("F818").schema();
+        this.f8190 = readerSchema.getField("F819").schema();
+        this.f8200 = readerSchema.getField("F820").schema();
+        this.f8210 = readerSchema.getField("F821").schema();
+        this.f8220 = readerSchema.getField("F822").schema();
+        this.f8230 = readerSchema.getField("F823").schema();
+        this.f8240 = readerSchema.getField("F824").schema();
+        this.f8250 = readerSchema.getField("F825").schema();
+        this.f8260 = readerSchema.getField("F826").schema();
+        this.f8270 = readerSchema.getField("F827").schema();
+        this.f8280 = readerSchema.getField("F828").schema();
+        this.f8290 = readerSchema.getField("F829").schema();
+        this.f8300 = readerSchema.getField("F830").schema();
+        this.f8310 = readerSchema.getField("F831").schema();
+        this.f8320 = readerSchema.getField("F832").schema();
+        this.f8330 = readerSchema.getField("F833").schema();
+        this.f8340 = readerSchema.getField("F834").schema();
+        this.f8350 = readerSchema.getField("F835").schema();
+        this.f8360 = readerSchema.getField("F836").schema();
+        this.f8370 = readerSchema.getField("F837").schema();
+        this.f8380 = readerSchema.getField("F838").schema();
+        this.f8390 = readerSchema.getField("F839").schema();
+        this.f8400 = readerSchema.getField("F840").schema();
+        this.f8410 = readerSchema.getField("F841").schema();
+        this.f8420 = readerSchema.getField("F842").schema();
+        this.f8430 = readerSchema.getField("F843").schema();
+        this.f8440 = readerSchema.getField("F844").schema();
+        this.f8450 = readerSchema.getField("F845").schema();
+        this.f8460 = readerSchema.getField("F846").schema();
+        this.f8470 = readerSchema.getField("F847").schema();
+        this.f8480 = readerSchema.getField("F848").schema();
+        this.f8490 = readerSchema.getField("F849").schema();
+        this.f8500 = readerSchema.getField("F850").schema();
+        this.f8510 = readerSchema.getField("F851").schema();
+        this.f8520 = readerSchema.getField("F852").schema();
+        this.f8530 = readerSchema.getField("F853").schema();
+        this.f8540 = readerSchema.getField("F854").schema();
+        this.f8550 = readerSchema.getField("F855").schema();
+        this.f8560 = readerSchema.getField("F856").schema();
+        this.f8570 = readerSchema.getField("F857").schema();
+        this.f8580 = readerSchema.getField("F858").schema();
+        this.f8590 = readerSchema.getField("F859").schema();
+        this.f8600 = readerSchema.getField("F860").schema();
+        this.f8610 = readerSchema.getField("F861").schema();
+        this.f8620 = readerSchema.getField("F862").schema();
+        this.f8630 = readerSchema.getField("F863").schema();
+        this.f8640 = readerSchema.getField("F864").schema();
+        this.f8650 = readerSchema.getField("F865").schema();
+        this.f8660 = readerSchema.getField("F866").schema();
+        this.f8670 = readerSchema.getField("F867").schema();
+        this.f8680 = readerSchema.getField("F868").schema();
+        this.f8690 = readerSchema.getField("F869").schema();
+        this.f8700 = readerSchema.getField("F870").schema();
+        this.f8710 = readerSchema.getField("F871").schema();
+        this.f8720 = readerSchema.getField("F872").schema();
+        this.f8730 = readerSchema.getField("F873").schema();
+        this.f8740 = readerSchema.getField("F874").schema();
+        this.f8750 = readerSchema.getField("F875").schema();
+        this.f8760 = readerSchema.getField("F876").schema();
+        this.f8770 = readerSchema.getField("F877").schema();
+        this.f8780 = readerSchema.getField("F878").schema();
+        this.f8790 = readerSchema.getField("F879").schema();
+        this.f8800 = readerSchema.getField("F880").schema();
+        this.f8810 = readerSchema.getField("F881").schema();
+        this.f8820 = readerSchema.getField("F882").schema();
+        this.f8830 = readerSchema.getField("F883").schema();
+        this.f8840 = readerSchema.getField("F884").schema();
+        this.f8850 = readerSchema.getField("F885").schema();
+        this.f8860 = readerSchema.getField("F886").schema();
+        this.f8870 = readerSchema.getField("F887").schema();
+        this.f8880 = readerSchema.getField("F888").schema();
+        this.f8890 = readerSchema.getField("F889").schema();
+        this.f8900 = readerSchema.getField("F890").schema();
+        this.f8910 = readerSchema.getField("F891").schema();
+        this.f8920 = readerSchema.getField("F892").schema();
+        this.f8930 = readerSchema.getField("F893").schema();
+        this.f8940 = readerSchema.getField("F894").schema();
+        this.f8950 = readerSchema.getField("F895").schema();
+        this.f8960 = readerSchema.getField("F896").schema();
+        this.f8970 = readerSchema.getField("F897").schema();
+        this.f8980 = readerSchema.getField("F898").schema();
+        this.f8990 = readerSchema.getField("F899").schema();
+        this.f9000 = readerSchema.getField("F900").schema();
+        this.f9010 = readerSchema.getField("F901").schema();
+        this.f9020 = readerSchema.getField("F902").schema();
+        this.f9030 = readerSchema.getField("F903").schema();
+        this.f9040 = readerSchema.getField("F904").schema();
+        this.f9050 = readerSchema.getField("F905").schema();
+        this.f9060 = readerSchema.getField("F906").schema();
+        this.f9070 = readerSchema.getField("F907").schema();
+        this.f9080 = readerSchema.getField("F908").schema();
+        this.f9090 = readerSchema.getField("F909").schema();
+        this.f9100 = readerSchema.getField("F910").schema();
+        this.f9110 = readerSchema.getField("F911").schema();
+        this.f9120 = readerSchema.getField("F912").schema();
+        this.f9130 = readerSchema.getField("F913").schema();
+        this.f9140 = readerSchema.getField("F914").schema();
+        this.f9150 = readerSchema.getField("F915").schema();
+        this.f9160 = readerSchema.getField("F916").schema();
+        this.f9170 = readerSchema.getField("F917").schema();
+        this.f9180 = readerSchema.getField("F918").schema();
+        this.f9190 = readerSchema.getField("F919").schema();
+        this.f9200 = readerSchema.getField("F920").schema();
+        this.f9210 = readerSchema.getField("F921").schema();
+        this.f9220 = readerSchema.getField("F922").schema();
+        this.f9230 = readerSchema.getField("F923").schema();
+        this.f9240 = readerSchema.getField("F924").schema();
+        this.f9250 = readerSchema.getField("F925").schema();
+        this.f9260 = readerSchema.getField("F926").schema();
+        this.f9270 = readerSchema.getField("F927").schema();
+        this.f9280 = readerSchema.getField("F928").schema();
+        this.f9290 = readerSchema.getField("F929").schema();
+        this.f9300 = readerSchema.getField("F930").schema();
+        this.f9310 = readerSchema.getField("F931").schema();
+        this.f9320 = readerSchema.getField("F932").schema();
+        this.f9330 = readerSchema.getField("F933").schema();
+        this.f9340 = readerSchema.getField("F934").schema();
+        this.f9350 = readerSchema.getField("F935").schema();
+        this.f9360 = readerSchema.getField("F936").schema();
+        this.f9370 = readerSchema.getField("F937").schema();
+        this.f9380 = readerSchema.getField("F938").schema();
+        this.f9390 = readerSchema.getField("F939").schema();
+        this.f9400 = readerSchema.getField("F940").schema();
+        this.f9410 = readerSchema.getField("F941").schema();
+        this.f9420 = readerSchema.getField("F942").schema();
+        this.f9430 = readerSchema.getField("F943").schema();
+        this.f9440 = readerSchema.getField("F944").schema();
+        this.f9450 = readerSchema.getField("F945").schema();
+        this.f9460 = readerSchema.getField("F946").schema();
+        this.f9470 = readerSchema.getField("F947").schema();
+        this.f9480 = readerSchema.getField("F948").schema();
+        this.f9490 = readerSchema.getField("F949").schema();
+        this.f9500 = readerSchema.getField("F950").schema();
+        this.f9510 = readerSchema.getField("F951").schema();
+        this.f9520 = readerSchema.getField("F952").schema();
+        this.f9530 = readerSchema.getField("F953").schema();
+        this.f9540 = readerSchema.getField("F954").schema();
+        this.f9550 = readerSchema.getField("F955").schema();
+        this.f9560 = readerSchema.getField("F956").schema();
+        this.f9570 = readerSchema.getField("F957").schema();
+        this.f9580 = readerSchema.getField("F958").schema();
+        this.f9590 = readerSchema.getField("F959").schema();
+        this.f9600 = readerSchema.getField("F960").schema();
+        this.f9610 = readerSchema.getField("F961").schema();
+        this.f9620 = readerSchema.getField("F962").schema();
+        this.f9630 = readerSchema.getField("F963").schema();
+        this.f9640 = readerSchema.getField("F964").schema();
+        this.f9650 = readerSchema.getField("F965").schema();
+        this.f9660 = readerSchema.getField("F966").schema();
+        this.f9670 = readerSchema.getField("F967").schema();
+        this.f9680 = readerSchema.getField("F968").schema();
+        this.f9690 = readerSchema.getField("F969").schema();
+        this.f9700 = readerSchema.getField("F970").schema();
+        this.f9710 = readerSchema.getField("F971").schema();
+        this.f9720 = readerSchema.getField("F972").schema();
+        this.f9730 = readerSchema.getField("F973").schema();
+        this.f9740 = readerSchema.getField("F974").schema();
+        this.f9750 = readerSchema.getField("F975").schema();
+        this.f9760 = readerSchema.getField("F976").schema();
+        this.f9770 = readerSchema.getField("F977").schema();
+        this.f9780 = readerSchema.getField("F978").schema();
+        this.f9790 = readerSchema.getField("F979").schema();
+        this.f9800 = readerSchema.getField("F980").schema();
+        this.f9810 = readerSchema.getField("F981").schema();
+        this.f9820 = readerSchema.getField("F982").schema();
+        this.f9830 = readerSchema.getField("F983").schema();
+        this.f9840 = readerSchema.getField("F984").schema();
+        this.f9850 = readerSchema.getField("F985").schema();
+        this.f9860 = readerSchema.getField("F986").schema();
+        this.f9870 = readerSchema.getField("F987").schema();
+        this.f9880 = readerSchema.getField("F988").schema();
+        this.f9890 = readerSchema.getField("F989").schema();
+        this.f9900 = readerSchema.getField("F990").schema();
+        this.f9910 = readerSchema.getField("F991").schema();
+        this.f9920 = readerSchema.getField("F992").schema();
+        this.f9930 = readerSchema.getField("F993").schema();
+        this.f9940 = readerSchema.getField("F994").schema();
+        this.f9950 = readerSchema.getField("F995").schema();
+        this.f9960 = readerSchema.getField("F996").schema();
+        this.f9970 = readerSchema.getField("F997").schema();
+        this.f9980 = readerSchema.getField("F998").schema();
+        this.f9990 = readerSchema.getField("F999").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F0': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F1': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(2);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(3);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F3': "+ unionIndex3));
+            }
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence4;
+                Object oldString4 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(4);
+                if (oldString4 instanceof Utf8) {
+                    charSequence4 = (decoder).readString(((Utf8) oldString4));
+                } else {
+                    charSequence4 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, charSequence4);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F4': "+ unionIndex4));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Utf8 charSequence5;
+                Object oldString5 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(5);
+                if (oldString5 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) oldString5));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, charSequence5);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F5': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence6;
+                Object oldString6 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(6);
+                if (oldString6 instanceof Utf8) {
+                    charSequence6 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence6 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, charSequence6);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F6': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence7;
+                Object oldString7 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(7);
+                if (oldString7 instanceof Utf8) {
+                    charSequence7 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence7 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, charSequence7);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F7': "+ unionIndex7));
+            }
+        }
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, null);
+        } else {
+            if (unionIndex8 == 1) {
+                Utf8 charSequence8;
+                Object oldString8 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(8);
+                if (oldString8 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString8));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, charSequence8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F8': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, null);
+        } else {
+            if (unionIndex9 == 1) {
+                Utf8 charSequence9;
+                Object oldString9 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(9);
+                if (oldString9 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString9));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F9': "+ unionIndex9));
+            }
+        }
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, null);
+        } else {
+            if (unionIndex10 == 1) {
+                Utf8 charSequence10;
+                Object oldString10 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(10);
+                if (oldString10 instanceof Utf8) {
+                    charSequence10 = (decoder).readString(((Utf8) oldString10));
+                } else {
+                    charSequence10 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, charSequence10);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F10': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, null);
+        } else {
+            if (unionIndex11 == 1) {
+                Utf8 charSequence11;
+                Object oldString11 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(11);
+                if (oldString11 instanceof Utf8) {
+                    charSequence11 = (decoder).readString(((Utf8) oldString11));
+                } else {
+                    charSequence11 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, charSequence11);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F11': "+ unionIndex11));
+            }
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence12;
+                Object oldString12 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(12);
+                if (oldString12 instanceof Utf8) {
+                    charSequence12 = (decoder).readString(((Utf8) oldString12));
+                } else {
+                    charSequence12 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, charSequence12);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F12': "+ unionIndex12));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence13;
+                Object oldString13 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(13);
+                if (oldString13 instanceof Utf8) {
+                    charSequence13 = (decoder).readString(((Utf8) oldString13));
+                } else {
+                    charSequence13 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, charSequence13);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F13': "+ unionIndex13));
+            }
+        }
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence14;
+                Object oldString14 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(14);
+                if (oldString14 instanceof Utf8) {
+                    charSequence14 = (decoder).readString(((Utf8) oldString14));
+                } else {
+                    charSequence14 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, charSequence14);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F14': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence15;
+                Object oldString15 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(15);
+                if (oldString15 instanceof Utf8) {
+                    charSequence15 = (decoder).readString(((Utf8) oldString15));
+                } else {
+                    charSequence15 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, charSequence15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F15': "+ unionIndex15));
+            }
+        }
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Utf8 charSequence16;
+                Object oldString16 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(16);
+                if (oldString16 instanceof Utf8) {
+                    charSequence16 = (decoder).readString(((Utf8) oldString16));
+                } else {
+                    charSequence16 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, charSequence16);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F16': "+ unionIndex16));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Utf8 charSequence17;
+                Object oldString17 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(17);
+                if (oldString17 instanceof Utf8) {
+                    charSequence17 = (decoder).readString(((Utf8) oldString17));
+                } else {
+                    charSequence17 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, charSequence17);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F17': "+ unionIndex17));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Utf8 charSequence18;
+                Object oldString18 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(18);
+                if (oldString18 instanceof Utf8) {
+                    charSequence18 = (decoder).readString(((Utf8) oldString18));
+                } else {
+                    charSequence18 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, charSequence18);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F18': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex19 = (decoder.readIndex());
+        if (unionIndex19 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, null);
+        } else {
+            if (unionIndex19 == 1) {
+                Utf8 charSequence19;
+                Object oldString19 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(19);
+                if (oldString19 instanceof Utf8) {
+                    charSequence19 = (decoder).readString(((Utf8) oldString19));
+                } else {
+                    charSequence19 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, charSequence19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F19': "+ unionIndex19));
+            }
+        }
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, null);
+        } else {
+            if (unionIndex20 == 1) {
+                Utf8 charSequence20;
+                Object oldString20 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(20);
+                if (oldString20 instanceof Utf8) {
+                    charSequence20 = (decoder).readString(((Utf8) oldString20));
+                } else {
+                    charSequence20 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, charSequence20);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F20': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, null);
+        } else {
+            if (unionIndex21 == 1) {
+                Utf8 charSequence21;
+                Object oldString21 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(21);
+                if (oldString21 instanceof Utf8) {
+                    charSequence21 = (decoder).readString(((Utf8) oldString21));
+                } else {
+                    charSequence21 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, charSequence21);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F21': "+ unionIndex21));
+            }
+        }
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Utf8 charSequence22;
+                Object oldString22 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(22);
+                if (oldString22 instanceof Utf8) {
+                    charSequence22 = (decoder).readString(((Utf8) oldString22));
+                } else {
+                    charSequence22 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, charSequence22);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F22': "+ unionIndex22));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Utf8 charSequence23;
+                Object oldString23 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(23);
+                if (oldString23 instanceof Utf8) {
+                    charSequence23 = (decoder).readString(((Utf8) oldString23));
+                } else {
+                    charSequence23 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, charSequence23);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F23': "+ unionIndex23));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Utf8 charSequence24;
+                Object oldString24 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(24);
+                if (oldString24 instanceof Utf8) {
+                    charSequence24 = (decoder).readString(((Utf8) oldString24));
+                } else {
+                    charSequence24 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, charSequence24);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F24': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, null);
+        } else {
+            if (unionIndex25 == 1) {
+                Utf8 charSequence25;
+                Object oldString25 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(25);
+                if (oldString25 instanceof Utf8) {
+                    charSequence25 = (decoder).readString(((Utf8) oldString25));
+                } else {
+                    charSequence25 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, charSequence25);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F25': "+ unionIndex25));
+            }
+        }
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, null);
+        } else {
+            if (unionIndex26 == 1) {
+                Utf8 charSequence26;
+                Object oldString26 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(26);
+                if (oldString26 instanceof Utf8) {
+                    charSequence26 = (decoder).readString(((Utf8) oldString26));
+                } else {
+                    charSequence26 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, charSequence26);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F26': "+ unionIndex26));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex27 = (decoder.readIndex());
+        if (unionIndex27 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, null);
+        } else {
+            if (unionIndex27 == 1) {
+                Utf8 charSequence27;
+                Object oldString27 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(27);
+                if (oldString27 instanceof Utf8) {
+                    charSequence27 = (decoder).readString(((Utf8) oldString27));
+                } else {
+                    charSequence27 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, charSequence27);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F27': "+ unionIndex27));
+            }
+        }
+        int unionIndex28 = (decoder.readIndex());
+        if (unionIndex28 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, null);
+        } else {
+            if (unionIndex28 == 1) {
+                Utf8 charSequence28;
+                Object oldString28 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(28);
+                if (oldString28 instanceof Utf8) {
+                    charSequence28 = (decoder).readString(((Utf8) oldString28));
+                } else {
+                    charSequence28 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, charSequence28);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F28': "+ unionIndex28));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex29 = (decoder.readIndex());
+        if (unionIndex29 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, null);
+        } else {
+            if (unionIndex29 == 1) {
+                Utf8 charSequence29;
+                Object oldString29 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(29);
+                if (oldString29 instanceof Utf8) {
+                    charSequence29 = (decoder).readString(((Utf8) oldString29));
+                } else {
+                    charSequence29 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, charSequence29);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F29': "+ unionIndex29));
+            }
+        }
+        int unionIndex30 = (decoder.readIndex());
+        if (unionIndex30 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, null);
+        } else {
+            if (unionIndex30 == 1) {
+                Utf8 charSequence30;
+                Object oldString30 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(30);
+                if (oldString30 instanceof Utf8) {
+                    charSequence30 = (decoder).readString(((Utf8) oldString30));
+                } else {
+                    charSequence30 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, charSequence30);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F30': "+ unionIndex30));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex31 = (decoder.readIndex());
+        if (unionIndex31 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, null);
+        } else {
+            if (unionIndex31 == 1) {
+                Utf8 charSequence31;
+                Object oldString31 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(31);
+                if (oldString31 instanceof Utf8) {
+                    charSequence31 = (decoder).readString(((Utf8) oldString31));
+                } else {
+                    charSequence31 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, charSequence31);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F31': "+ unionIndex31));
+            }
+        }
+        int unionIndex32 = (decoder.readIndex());
+        if (unionIndex32 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, null);
+        } else {
+            if (unionIndex32 == 1) {
+                Utf8 charSequence32;
+                Object oldString32 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(32);
+                if (oldString32 instanceof Utf8) {
+                    charSequence32 = (decoder).readString(((Utf8) oldString32));
+                } else {
+                    charSequence32 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, charSequence32);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F32': "+ unionIndex32));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex33 = (decoder.readIndex());
+        if (unionIndex33 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, null);
+        } else {
+            if (unionIndex33 == 1) {
+                Utf8 charSequence33;
+                Object oldString33 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(33);
+                if (oldString33 instanceof Utf8) {
+                    charSequence33 = (decoder).readString(((Utf8) oldString33));
+                } else {
+                    charSequence33 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, charSequence33);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F33': "+ unionIndex33));
+            }
+        }
+        int unionIndex34 = (decoder.readIndex());
+        if (unionIndex34 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, null);
+        } else {
+            if (unionIndex34 == 1) {
+                Utf8 charSequence34;
+                Object oldString34 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(34);
+                if (oldString34 instanceof Utf8) {
+                    charSequence34 = (decoder).readString(((Utf8) oldString34));
+                } else {
+                    charSequence34 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, charSequence34);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F34': "+ unionIndex34));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex35 = (decoder.readIndex());
+        if (unionIndex35 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, null);
+        } else {
+            if (unionIndex35 == 1) {
+                Utf8 charSequence35;
+                Object oldString35 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(35);
+                if (oldString35 instanceof Utf8) {
+                    charSequence35 = (decoder).readString(((Utf8) oldString35));
+                } else {
+                    charSequence35 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, charSequence35);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F35': "+ unionIndex35));
+            }
+        }
+        int unionIndex36 = (decoder.readIndex());
+        if (unionIndex36 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, null);
+        } else {
+            if (unionIndex36 == 1) {
+                Utf8 charSequence36;
+                Object oldString36 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(36);
+                if (oldString36 instanceof Utf8) {
+                    charSequence36 = (decoder).readString(((Utf8) oldString36));
+                } else {
+                    charSequence36 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, charSequence36);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F36': "+ unionIndex36));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex37 = (decoder.readIndex());
+        if (unionIndex37 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, null);
+        } else {
+            if (unionIndex37 == 1) {
+                Utf8 charSequence37;
+                Object oldString37 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(37);
+                if (oldString37 instanceof Utf8) {
+                    charSequence37 = (decoder).readString(((Utf8) oldString37));
+                } else {
+                    charSequence37 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, charSequence37);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F37': "+ unionIndex37));
+            }
+        }
+        int unionIndex38 = (decoder.readIndex());
+        if (unionIndex38 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, null);
+        } else {
+            if (unionIndex38 == 1) {
+                Utf8 charSequence38;
+                Object oldString38 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(38);
+                if (oldString38 instanceof Utf8) {
+                    charSequence38 = (decoder).readString(((Utf8) oldString38));
+                } else {
+                    charSequence38 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, charSequence38);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F38': "+ unionIndex38));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex39 = (decoder.readIndex());
+        if (unionIndex39 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, null);
+        } else {
+            if (unionIndex39 == 1) {
+                Utf8 charSequence39;
+                Object oldString39 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(39);
+                if (oldString39 instanceof Utf8) {
+                    charSequence39 = (decoder).readString(((Utf8) oldString39));
+                } else {
+                    charSequence39 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, charSequence39);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F39': "+ unionIndex39));
+            }
+        }
+        int unionIndex40 = (decoder.readIndex());
+        if (unionIndex40 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, null);
+        } else {
+            if (unionIndex40 == 1) {
+                Utf8 charSequence40;
+                Object oldString40 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(40);
+                if (oldString40 instanceof Utf8) {
+                    charSequence40 = (decoder).readString(((Utf8) oldString40));
+                } else {
+                    charSequence40 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, charSequence40);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F40': "+ unionIndex40));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex41 = (decoder.readIndex());
+        if (unionIndex41 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, null);
+        } else {
+            if (unionIndex41 == 1) {
+                Utf8 charSequence41;
+                Object oldString41 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(41);
+                if (oldString41 instanceof Utf8) {
+                    charSequence41 = (decoder).readString(((Utf8) oldString41));
+                } else {
+                    charSequence41 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, charSequence41);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F41': "+ unionIndex41));
+            }
+        }
+        int unionIndex42 = (decoder.readIndex());
+        if (unionIndex42 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, null);
+        } else {
+            if (unionIndex42 == 1) {
+                Utf8 charSequence42;
+                Object oldString42 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(42);
+                if (oldString42 instanceof Utf8) {
+                    charSequence42 = (decoder).readString(((Utf8) oldString42));
+                } else {
+                    charSequence42 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, charSequence42);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F42': "+ unionIndex42));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex43 = (decoder.readIndex());
+        if (unionIndex43 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, null);
+        } else {
+            if (unionIndex43 == 1) {
+                Utf8 charSequence43;
+                Object oldString43 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(43);
+                if (oldString43 instanceof Utf8) {
+                    charSequence43 = (decoder).readString(((Utf8) oldString43));
+                } else {
+                    charSequence43 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, charSequence43);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F43': "+ unionIndex43));
+            }
+        }
+        int unionIndex44 = (decoder.readIndex());
+        if (unionIndex44 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, null);
+        } else {
+            if (unionIndex44 == 1) {
+                Utf8 charSequence44;
+                Object oldString44 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(44);
+                if (oldString44 instanceof Utf8) {
+                    charSequence44 = (decoder).readString(((Utf8) oldString44));
+                } else {
+                    charSequence44 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, charSequence44);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F44': "+ unionIndex44));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex45 = (decoder.readIndex());
+        if (unionIndex45 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, null);
+        } else {
+            if (unionIndex45 == 1) {
+                Utf8 charSequence45;
+                Object oldString45 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(45);
+                if (oldString45 instanceof Utf8) {
+                    charSequence45 = (decoder).readString(((Utf8) oldString45));
+                } else {
+                    charSequence45 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, charSequence45);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F45': "+ unionIndex45));
+            }
+        }
+        int unionIndex46 = (decoder.readIndex());
+        if (unionIndex46 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, null);
+        } else {
+            if (unionIndex46 == 1) {
+                Utf8 charSequence46;
+                Object oldString46 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(46);
+                if (oldString46 instanceof Utf8) {
+                    charSequence46 = (decoder).readString(((Utf8) oldString46));
+                } else {
+                    charSequence46 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, charSequence46);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F46': "+ unionIndex46));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex47 = (decoder.readIndex());
+        if (unionIndex47 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, null);
+        } else {
+            if (unionIndex47 == 1) {
+                Utf8 charSequence47;
+                Object oldString47 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(47);
+                if (oldString47 instanceof Utf8) {
+                    charSequence47 = (decoder).readString(((Utf8) oldString47));
+                } else {
+                    charSequence47 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, charSequence47);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F47': "+ unionIndex47));
+            }
+        }
+        int unionIndex48 = (decoder.readIndex());
+        if (unionIndex48 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, null);
+        } else {
+            if (unionIndex48 == 1) {
+                Utf8 charSequence48;
+                Object oldString48 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(48);
+                if (oldString48 instanceof Utf8) {
+                    charSequence48 = (decoder).readString(((Utf8) oldString48));
+                } else {
+                    charSequence48 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, charSequence48);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F48': "+ unionIndex48));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex49 = (decoder.readIndex());
+        if (unionIndex49 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, null);
+        } else {
+            if (unionIndex49 == 1) {
+                Utf8 charSequence49;
+                Object oldString49 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(49);
+                if (oldString49 instanceof Utf8) {
+                    charSequence49 = (decoder).readString(((Utf8) oldString49));
+                } else {
+                    charSequence49 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, charSequence49);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F49': "+ unionIndex49));
+            }
+        }
+        int unionIndex50 = (decoder.readIndex());
+        if (unionIndex50 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, null);
+        } else {
+            if (unionIndex50 == 1) {
+                Utf8 charSequence50;
+                Object oldString50 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(50);
+                if (oldString50 instanceof Utf8) {
+                    charSequence50 = (decoder).readString(((Utf8) oldString50));
+                } else {
+                    charSequence50 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, charSequence50);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F50': "+ unionIndex50));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex51 = (decoder.readIndex());
+        if (unionIndex51 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, null);
+        } else {
+            if (unionIndex51 == 1) {
+                Utf8 charSequence51;
+                Object oldString51 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(51);
+                if (oldString51 instanceof Utf8) {
+                    charSequence51 = (decoder).readString(((Utf8) oldString51));
+                } else {
+                    charSequence51 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, charSequence51);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F51': "+ unionIndex51));
+            }
+        }
+        int unionIndex52 = (decoder.readIndex());
+        if (unionIndex52 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, null);
+        } else {
+            if (unionIndex52 == 1) {
+                Utf8 charSequence52;
+                Object oldString52 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(52);
+                if (oldString52 instanceof Utf8) {
+                    charSequence52 = (decoder).readString(((Utf8) oldString52));
+                } else {
+                    charSequence52 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, charSequence52);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F52': "+ unionIndex52));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex53 = (decoder.readIndex());
+        if (unionIndex53 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, null);
+        } else {
+            if (unionIndex53 == 1) {
+                Utf8 charSequence53;
+                Object oldString53 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(53);
+                if (oldString53 instanceof Utf8) {
+                    charSequence53 = (decoder).readString(((Utf8) oldString53));
+                } else {
+                    charSequence53 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, charSequence53);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F53': "+ unionIndex53));
+            }
+        }
+        int unionIndex54 = (decoder.readIndex());
+        if (unionIndex54 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, null);
+        } else {
+            if (unionIndex54 == 1) {
+                Utf8 charSequence54;
+                Object oldString54 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(54);
+                if (oldString54 instanceof Utf8) {
+                    charSequence54 = (decoder).readString(((Utf8) oldString54));
+                } else {
+                    charSequence54 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, charSequence54);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F54': "+ unionIndex54));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex55 = (decoder.readIndex());
+        if (unionIndex55 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, null);
+        } else {
+            if (unionIndex55 == 1) {
+                Utf8 charSequence55;
+                Object oldString55 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(55);
+                if (oldString55 instanceof Utf8) {
+                    charSequence55 = (decoder).readString(((Utf8) oldString55));
+                } else {
+                    charSequence55 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, charSequence55);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F55': "+ unionIndex55));
+            }
+        }
+        int unionIndex56 = (decoder.readIndex());
+        if (unionIndex56 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, null);
+        } else {
+            if (unionIndex56 == 1) {
+                Utf8 charSequence56;
+                Object oldString56 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(56);
+                if (oldString56 instanceof Utf8) {
+                    charSequence56 = (decoder).readString(((Utf8) oldString56));
+                } else {
+                    charSequence56 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, charSequence56);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F56': "+ unionIndex56));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex57 = (decoder.readIndex());
+        if (unionIndex57 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, null);
+        } else {
+            if (unionIndex57 == 1) {
+                Utf8 charSequence57;
+                Object oldString57 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(57);
+                if (oldString57 instanceof Utf8) {
+                    charSequence57 = (decoder).readString(((Utf8) oldString57));
+                } else {
+                    charSequence57 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, charSequence57);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F57': "+ unionIndex57));
+            }
+        }
+        int unionIndex58 = (decoder.readIndex());
+        if (unionIndex58 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, null);
+        } else {
+            if (unionIndex58 == 1) {
+                Utf8 charSequence58;
+                Object oldString58 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(58);
+                if (oldString58 instanceof Utf8) {
+                    charSequence58 = (decoder).readString(((Utf8) oldString58));
+                } else {
+                    charSequence58 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, charSequence58);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F58': "+ unionIndex58));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex59 = (decoder.readIndex());
+        if (unionIndex59 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, null);
+        } else {
+            if (unionIndex59 == 1) {
+                Utf8 charSequence59;
+                Object oldString59 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(59);
+                if (oldString59 instanceof Utf8) {
+                    charSequence59 = (decoder).readString(((Utf8) oldString59));
+                } else {
+                    charSequence59 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, charSequence59);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F59': "+ unionIndex59));
+            }
+        }
+        int unionIndex60 = (decoder.readIndex());
+        if (unionIndex60 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, null);
+        } else {
+            if (unionIndex60 == 1) {
+                Utf8 charSequence60;
+                Object oldString60 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(60);
+                if (oldString60 instanceof Utf8) {
+                    charSequence60 = (decoder).readString(((Utf8) oldString60));
+                } else {
+                    charSequence60 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, charSequence60);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F60': "+ unionIndex60));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex61 = (decoder.readIndex());
+        if (unionIndex61 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, null);
+        } else {
+            if (unionIndex61 == 1) {
+                Utf8 charSequence61;
+                Object oldString61 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(61);
+                if (oldString61 instanceof Utf8) {
+                    charSequence61 = (decoder).readString(((Utf8) oldString61));
+                } else {
+                    charSequence61 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, charSequence61);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F61': "+ unionIndex61));
+            }
+        }
+        int unionIndex62 = (decoder.readIndex());
+        if (unionIndex62 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, null);
+        } else {
+            if (unionIndex62 == 1) {
+                Utf8 charSequence62;
+                Object oldString62 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(62);
+                if (oldString62 instanceof Utf8) {
+                    charSequence62 = (decoder).readString(((Utf8) oldString62));
+                } else {
+                    charSequence62 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, charSequence62);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F62': "+ unionIndex62));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex63 = (decoder.readIndex());
+        if (unionIndex63 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, null);
+        } else {
+            if (unionIndex63 == 1) {
+                Utf8 charSequence63;
+                Object oldString63 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(63);
+                if (oldString63 instanceof Utf8) {
+                    charSequence63 = (decoder).readString(((Utf8) oldString63));
+                } else {
+                    charSequence63 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, charSequence63);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F63': "+ unionIndex63));
+            }
+        }
+        int unionIndex64 = (decoder.readIndex());
+        if (unionIndex64 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, null);
+        } else {
+            if (unionIndex64 == 1) {
+                Utf8 charSequence64;
+                Object oldString64 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(64);
+                if (oldString64 instanceof Utf8) {
+                    charSequence64 = (decoder).readString(((Utf8) oldString64));
+                } else {
+                    charSequence64 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, charSequence64);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F64': "+ unionIndex64));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex65 = (decoder.readIndex());
+        if (unionIndex65 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, null);
+        } else {
+            if (unionIndex65 == 1) {
+                Utf8 charSequence65;
+                Object oldString65 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(65);
+                if (oldString65 instanceof Utf8) {
+                    charSequence65 = (decoder).readString(((Utf8) oldString65));
+                } else {
+                    charSequence65 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, charSequence65);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F65': "+ unionIndex65));
+            }
+        }
+        int unionIndex66 = (decoder.readIndex());
+        if (unionIndex66 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, null);
+        } else {
+            if (unionIndex66 == 1) {
+                Utf8 charSequence66;
+                Object oldString66 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(66);
+                if (oldString66 instanceof Utf8) {
+                    charSequence66 = (decoder).readString(((Utf8) oldString66));
+                } else {
+                    charSequence66 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, charSequence66);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F66': "+ unionIndex66));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex67 = (decoder.readIndex());
+        if (unionIndex67 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, null);
+        } else {
+            if (unionIndex67 == 1) {
+                Utf8 charSequence67;
+                Object oldString67 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(67);
+                if (oldString67 instanceof Utf8) {
+                    charSequence67 = (decoder).readString(((Utf8) oldString67));
+                } else {
+                    charSequence67 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, charSequence67);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F67': "+ unionIndex67));
+            }
+        }
+        int unionIndex68 = (decoder.readIndex());
+        if (unionIndex68 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, null);
+        } else {
+            if (unionIndex68 == 1) {
+                Utf8 charSequence68;
+                Object oldString68 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(68);
+                if (oldString68 instanceof Utf8) {
+                    charSequence68 = (decoder).readString(((Utf8) oldString68));
+                } else {
+                    charSequence68 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, charSequence68);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F68': "+ unionIndex68));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex69 = (decoder.readIndex());
+        if (unionIndex69 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, null);
+        } else {
+            if (unionIndex69 == 1) {
+                Utf8 charSequence69;
+                Object oldString69 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(69);
+                if (oldString69 instanceof Utf8) {
+                    charSequence69 = (decoder).readString(((Utf8) oldString69));
+                } else {
+                    charSequence69 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, charSequence69);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F69': "+ unionIndex69));
+            }
+        }
+        int unionIndex70 = (decoder.readIndex());
+        if (unionIndex70 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, null);
+        } else {
+            if (unionIndex70 == 1) {
+                Utf8 charSequence70;
+                Object oldString70 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(70);
+                if (oldString70 instanceof Utf8) {
+                    charSequence70 = (decoder).readString(((Utf8) oldString70));
+                } else {
+                    charSequence70 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, charSequence70);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F70': "+ unionIndex70));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex71 = (decoder.readIndex());
+        if (unionIndex71 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, null);
+        } else {
+            if (unionIndex71 == 1) {
+                Utf8 charSequence71;
+                Object oldString71 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(71);
+                if (oldString71 instanceof Utf8) {
+                    charSequence71 = (decoder).readString(((Utf8) oldString71));
+                } else {
+                    charSequence71 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, charSequence71);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F71': "+ unionIndex71));
+            }
+        }
+        int unionIndex72 = (decoder.readIndex());
+        if (unionIndex72 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, null);
+        } else {
+            if (unionIndex72 == 1) {
+                Utf8 charSequence72;
+                Object oldString72 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(72);
+                if (oldString72 instanceof Utf8) {
+                    charSequence72 = (decoder).readString(((Utf8) oldString72));
+                } else {
+                    charSequence72 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, charSequence72);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F72': "+ unionIndex72));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex73 = (decoder.readIndex());
+        if (unionIndex73 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, null);
+        } else {
+            if (unionIndex73 == 1) {
+                Utf8 charSequence73;
+                Object oldString73 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(73);
+                if (oldString73 instanceof Utf8) {
+                    charSequence73 = (decoder).readString(((Utf8) oldString73));
+                } else {
+                    charSequence73 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, charSequence73);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F73': "+ unionIndex73));
+            }
+        }
+        int unionIndex74 = (decoder.readIndex());
+        if (unionIndex74 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, null);
+        } else {
+            if (unionIndex74 == 1) {
+                Utf8 charSequence74;
+                Object oldString74 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(74);
+                if (oldString74 instanceof Utf8) {
+                    charSequence74 = (decoder).readString(((Utf8) oldString74));
+                } else {
+                    charSequence74 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, charSequence74);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F74': "+ unionIndex74));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex75 = (decoder.readIndex());
+        if (unionIndex75 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, null);
+        } else {
+            if (unionIndex75 == 1) {
+                Utf8 charSequence75;
+                Object oldString75 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(75);
+                if (oldString75 instanceof Utf8) {
+                    charSequence75 = (decoder).readString(((Utf8) oldString75));
+                } else {
+                    charSequence75 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, charSequence75);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F75': "+ unionIndex75));
+            }
+        }
+        int unionIndex76 = (decoder.readIndex());
+        if (unionIndex76 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, null);
+        } else {
+            if (unionIndex76 == 1) {
+                Utf8 charSequence76;
+                Object oldString76 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(76);
+                if (oldString76 instanceof Utf8) {
+                    charSequence76 = (decoder).readString(((Utf8) oldString76));
+                } else {
+                    charSequence76 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, charSequence76);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F76': "+ unionIndex76));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex77 = (decoder.readIndex());
+        if (unionIndex77 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, null);
+        } else {
+            if (unionIndex77 == 1) {
+                Utf8 charSequence77;
+                Object oldString77 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(77);
+                if (oldString77 instanceof Utf8) {
+                    charSequence77 = (decoder).readString(((Utf8) oldString77));
+                } else {
+                    charSequence77 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, charSequence77);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F77': "+ unionIndex77));
+            }
+        }
+        int unionIndex78 = (decoder.readIndex());
+        if (unionIndex78 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, null);
+        } else {
+            if (unionIndex78 == 1) {
+                Utf8 charSequence78;
+                Object oldString78 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(78);
+                if (oldString78 instanceof Utf8) {
+                    charSequence78 = (decoder).readString(((Utf8) oldString78));
+                } else {
+                    charSequence78 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, charSequence78);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F78': "+ unionIndex78));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex79 = (decoder.readIndex());
+        if (unionIndex79 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, null);
+        } else {
+            if (unionIndex79 == 1) {
+                Utf8 charSequence79;
+                Object oldString79 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(79);
+                if (oldString79 instanceof Utf8) {
+                    charSequence79 = (decoder).readString(((Utf8) oldString79));
+                } else {
+                    charSequence79 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, charSequence79);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F79': "+ unionIndex79));
+            }
+        }
+        int unionIndex80 = (decoder.readIndex());
+        if (unionIndex80 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, null);
+        } else {
+            if (unionIndex80 == 1) {
+                Utf8 charSequence80;
+                Object oldString80 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(80);
+                if (oldString80 instanceof Utf8) {
+                    charSequence80 = (decoder).readString(((Utf8) oldString80));
+                } else {
+                    charSequence80 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, charSequence80);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F80': "+ unionIndex80));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex81 = (decoder.readIndex());
+        if (unionIndex81 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, null);
+        } else {
+            if (unionIndex81 == 1) {
+                Utf8 charSequence81;
+                Object oldString81 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(81);
+                if (oldString81 instanceof Utf8) {
+                    charSequence81 = (decoder).readString(((Utf8) oldString81));
+                } else {
+                    charSequence81 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, charSequence81);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F81': "+ unionIndex81));
+            }
+        }
+        int unionIndex82 = (decoder.readIndex());
+        if (unionIndex82 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, null);
+        } else {
+            if (unionIndex82 == 1) {
+                Utf8 charSequence82;
+                Object oldString82 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(82);
+                if (oldString82 instanceof Utf8) {
+                    charSequence82 = (decoder).readString(((Utf8) oldString82));
+                } else {
+                    charSequence82 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, charSequence82);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F82': "+ unionIndex82));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex83 = (decoder.readIndex());
+        if (unionIndex83 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, null);
+        } else {
+            if (unionIndex83 == 1) {
+                Utf8 charSequence83;
+                Object oldString83 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(83);
+                if (oldString83 instanceof Utf8) {
+                    charSequence83 = (decoder).readString(((Utf8) oldString83));
+                } else {
+                    charSequence83 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, charSequence83);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F83': "+ unionIndex83));
+            }
+        }
+        int unionIndex84 = (decoder.readIndex());
+        if (unionIndex84 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, null);
+        } else {
+            if (unionIndex84 == 1) {
+                Utf8 charSequence84;
+                Object oldString84 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(84);
+                if (oldString84 instanceof Utf8) {
+                    charSequence84 = (decoder).readString(((Utf8) oldString84));
+                } else {
+                    charSequence84 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, charSequence84);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F84': "+ unionIndex84));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex85 = (decoder.readIndex());
+        if (unionIndex85 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, null);
+        } else {
+            if (unionIndex85 == 1) {
+                Utf8 charSequence85;
+                Object oldString85 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(85);
+                if (oldString85 instanceof Utf8) {
+                    charSequence85 = (decoder).readString(((Utf8) oldString85));
+                } else {
+                    charSequence85 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, charSequence85);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F85': "+ unionIndex85));
+            }
+        }
+        int unionIndex86 = (decoder.readIndex());
+        if (unionIndex86 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, null);
+        } else {
+            if (unionIndex86 == 1) {
+                Utf8 charSequence86;
+                Object oldString86 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(86);
+                if (oldString86 instanceof Utf8) {
+                    charSequence86 = (decoder).readString(((Utf8) oldString86));
+                } else {
+                    charSequence86 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, charSequence86);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F86': "+ unionIndex86));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex87 = (decoder.readIndex());
+        if (unionIndex87 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, null);
+        } else {
+            if (unionIndex87 == 1) {
+                Utf8 charSequence87;
+                Object oldString87 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(87);
+                if (oldString87 instanceof Utf8) {
+                    charSequence87 = (decoder).readString(((Utf8) oldString87));
+                } else {
+                    charSequence87 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, charSequence87);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F87': "+ unionIndex87));
+            }
+        }
+        int unionIndex88 = (decoder.readIndex());
+        if (unionIndex88 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, null);
+        } else {
+            if (unionIndex88 == 1) {
+                Utf8 charSequence88;
+                Object oldString88 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(88);
+                if (oldString88 instanceof Utf8) {
+                    charSequence88 = (decoder).readString(((Utf8) oldString88));
+                } else {
+                    charSequence88 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, charSequence88);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F88': "+ unionIndex88));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex89 = (decoder.readIndex());
+        if (unionIndex89 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, null);
+        } else {
+            if (unionIndex89 == 1) {
+                Utf8 charSequence89;
+                Object oldString89 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(89);
+                if (oldString89 instanceof Utf8) {
+                    charSequence89 = (decoder).readString(((Utf8) oldString89));
+                } else {
+                    charSequence89 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, charSequence89);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F89': "+ unionIndex89));
+            }
+        }
+        int unionIndex90 = (decoder.readIndex());
+        if (unionIndex90 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, null);
+        } else {
+            if (unionIndex90 == 1) {
+                Utf8 charSequence90;
+                Object oldString90 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(90);
+                if (oldString90 instanceof Utf8) {
+                    charSequence90 = (decoder).readString(((Utf8) oldString90));
+                } else {
+                    charSequence90 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, charSequence90);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F90': "+ unionIndex90));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex91 = (decoder.readIndex());
+        if (unionIndex91 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, null);
+        } else {
+            if (unionIndex91 == 1) {
+                Utf8 charSequence91;
+                Object oldString91 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(91);
+                if (oldString91 instanceof Utf8) {
+                    charSequence91 = (decoder).readString(((Utf8) oldString91));
+                } else {
+                    charSequence91 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, charSequence91);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F91': "+ unionIndex91));
+            }
+        }
+        int unionIndex92 = (decoder.readIndex());
+        if (unionIndex92 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, null);
+        } else {
+            if (unionIndex92 == 1) {
+                Utf8 charSequence92;
+                Object oldString92 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(92);
+                if (oldString92 instanceof Utf8) {
+                    charSequence92 = (decoder).readString(((Utf8) oldString92));
+                } else {
+                    charSequence92 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, charSequence92);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F92': "+ unionIndex92));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex93 = (decoder.readIndex());
+        if (unionIndex93 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, null);
+        } else {
+            if (unionIndex93 == 1) {
+                Utf8 charSequence93;
+                Object oldString93 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(93);
+                if (oldString93 instanceof Utf8) {
+                    charSequence93 = (decoder).readString(((Utf8) oldString93));
+                } else {
+                    charSequence93 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, charSequence93);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F93': "+ unionIndex93));
+            }
+        }
+        int unionIndex94 = (decoder.readIndex());
+        if (unionIndex94 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, null);
+        } else {
+            if (unionIndex94 == 1) {
+                Utf8 charSequence94;
+                Object oldString94 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(94);
+                if (oldString94 instanceof Utf8) {
+                    charSequence94 = (decoder).readString(((Utf8) oldString94));
+                } else {
+                    charSequence94 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, charSequence94);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F94': "+ unionIndex94));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex95 = (decoder.readIndex());
+        if (unionIndex95 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, null);
+        } else {
+            if (unionIndex95 == 1) {
+                Utf8 charSequence95;
+                Object oldString95 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(95);
+                if (oldString95 instanceof Utf8) {
+                    charSequence95 = (decoder).readString(((Utf8) oldString95));
+                } else {
+                    charSequence95 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, charSequence95);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F95': "+ unionIndex95));
+            }
+        }
+        int unionIndex96 = (decoder.readIndex());
+        if (unionIndex96 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, null);
+        } else {
+            if (unionIndex96 == 1) {
+                Utf8 charSequence96;
+                Object oldString96 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(96);
+                if (oldString96 instanceof Utf8) {
+                    charSequence96 = (decoder).readString(((Utf8) oldString96));
+                } else {
+                    charSequence96 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, charSequence96);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F96': "+ unionIndex96));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex97 = (decoder.readIndex());
+        if (unionIndex97 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, null);
+        } else {
+            if (unionIndex97 == 1) {
+                Utf8 charSequence97;
+                Object oldString97 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(97);
+                if (oldString97 instanceof Utf8) {
+                    charSequence97 = (decoder).readString(((Utf8) oldString97));
+                } else {
+                    charSequence97 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, charSequence97);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F97': "+ unionIndex97));
+            }
+        }
+        int unionIndex98 = (decoder.readIndex());
+        if (unionIndex98 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, null);
+        } else {
+            if (unionIndex98 == 1) {
+                Utf8 charSequence98;
+                Object oldString98 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(98);
+                if (oldString98 instanceof Utf8) {
+                    charSequence98 = (decoder).readString(((Utf8) oldString98));
+                } else {
+                    charSequence98 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, charSequence98);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F98': "+ unionIndex98));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex99 = (decoder.readIndex());
+        if (unionIndex99 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, null);
+        } else {
+            if (unionIndex99 == 1) {
+                Utf8 charSequence99;
+                Object oldString99 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(99);
+                if (oldString99 instanceof Utf8) {
+                    charSequence99 = (decoder).readString(((Utf8) oldString99));
+                } else {
+                    charSequence99 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, charSequence99);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F99': "+ unionIndex99));
+            }
+        }
+        int unionIndex100 = (decoder.readIndex());
+        if (unionIndex100 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, null);
+        } else {
+            if (unionIndex100 == 1) {
+                Utf8 charSequence100;
+                Object oldString100 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(100);
+                if (oldString100 instanceof Utf8) {
+                    charSequence100 = (decoder).readString(((Utf8) oldString100));
+                } else {
+                    charSequence100 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, charSequence100);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F100': "+ unionIndex100));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex101 = (decoder.readIndex());
+        if (unionIndex101 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, null);
+        } else {
+            if (unionIndex101 == 1) {
+                Utf8 charSequence101;
+                Object oldString101 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(101);
+                if (oldString101 instanceof Utf8) {
+                    charSequence101 = (decoder).readString(((Utf8) oldString101));
+                } else {
+                    charSequence101 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, charSequence101);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F101': "+ unionIndex101));
+            }
+        }
+        int unionIndex102 = (decoder.readIndex());
+        if (unionIndex102 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, null);
+        } else {
+            if (unionIndex102 == 1) {
+                Utf8 charSequence102;
+                Object oldString102 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(102);
+                if (oldString102 instanceof Utf8) {
+                    charSequence102 = (decoder).readString(((Utf8) oldString102));
+                } else {
+                    charSequence102 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, charSequence102);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F102': "+ unionIndex102));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex103 = (decoder.readIndex());
+        if (unionIndex103 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, null);
+        } else {
+            if (unionIndex103 == 1) {
+                Utf8 charSequence103;
+                Object oldString103 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(103);
+                if (oldString103 instanceof Utf8) {
+                    charSequence103 = (decoder).readString(((Utf8) oldString103));
+                } else {
+                    charSequence103 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, charSequence103);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F103': "+ unionIndex103));
+            }
+        }
+        int unionIndex104 = (decoder.readIndex());
+        if (unionIndex104 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, null);
+        } else {
+            if (unionIndex104 == 1) {
+                Utf8 charSequence104;
+                Object oldString104 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(104);
+                if (oldString104 instanceof Utf8) {
+                    charSequence104 = (decoder).readString(((Utf8) oldString104));
+                } else {
+                    charSequence104 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, charSequence104);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F104': "+ unionIndex104));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex105 = (decoder.readIndex());
+        if (unionIndex105 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, null);
+        } else {
+            if (unionIndex105 == 1) {
+                Utf8 charSequence105;
+                Object oldString105 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(105);
+                if (oldString105 instanceof Utf8) {
+                    charSequence105 = (decoder).readString(((Utf8) oldString105));
+                } else {
+                    charSequence105 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, charSequence105);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F105': "+ unionIndex105));
+            }
+        }
+        int unionIndex106 = (decoder.readIndex());
+        if (unionIndex106 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, null);
+        } else {
+            if (unionIndex106 == 1) {
+                Utf8 charSequence106;
+                Object oldString106 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(106);
+                if (oldString106 instanceof Utf8) {
+                    charSequence106 = (decoder).readString(((Utf8) oldString106));
+                } else {
+                    charSequence106 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, charSequence106);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F106': "+ unionIndex106));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex107 = (decoder.readIndex());
+        if (unionIndex107 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, null);
+        } else {
+            if (unionIndex107 == 1) {
+                Utf8 charSequence107;
+                Object oldString107 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(107);
+                if (oldString107 instanceof Utf8) {
+                    charSequence107 = (decoder).readString(((Utf8) oldString107));
+                } else {
+                    charSequence107 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, charSequence107);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F107': "+ unionIndex107));
+            }
+        }
+        int unionIndex108 = (decoder.readIndex());
+        if (unionIndex108 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, null);
+        } else {
+            if (unionIndex108 == 1) {
+                Utf8 charSequence108;
+                Object oldString108 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(108);
+                if (oldString108 instanceof Utf8) {
+                    charSequence108 = (decoder).readString(((Utf8) oldString108));
+                } else {
+                    charSequence108 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, charSequence108);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F108': "+ unionIndex108));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex109 = (decoder.readIndex());
+        if (unionIndex109 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, null);
+        } else {
+            if (unionIndex109 == 1) {
+                Utf8 charSequence109;
+                Object oldString109 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(109);
+                if (oldString109 instanceof Utf8) {
+                    charSequence109 = (decoder).readString(((Utf8) oldString109));
+                } else {
+                    charSequence109 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, charSequence109);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F109': "+ unionIndex109));
+            }
+        }
+        int unionIndex110 = (decoder.readIndex());
+        if (unionIndex110 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, null);
+        } else {
+            if (unionIndex110 == 1) {
+                Utf8 charSequence110;
+                Object oldString110 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(110);
+                if (oldString110 instanceof Utf8) {
+                    charSequence110 = (decoder).readString(((Utf8) oldString110));
+                } else {
+                    charSequence110 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, charSequence110);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F110': "+ unionIndex110));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex111 = (decoder.readIndex());
+        if (unionIndex111 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, null);
+        } else {
+            if (unionIndex111 == 1) {
+                Utf8 charSequence111;
+                Object oldString111 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(111);
+                if (oldString111 instanceof Utf8) {
+                    charSequence111 = (decoder).readString(((Utf8) oldString111));
+                } else {
+                    charSequence111 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, charSequence111);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F111': "+ unionIndex111));
+            }
+        }
+        int unionIndex112 = (decoder.readIndex());
+        if (unionIndex112 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, null);
+        } else {
+            if (unionIndex112 == 1) {
+                Utf8 charSequence112;
+                Object oldString112 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(112);
+                if (oldString112 instanceof Utf8) {
+                    charSequence112 = (decoder).readString(((Utf8) oldString112));
+                } else {
+                    charSequence112 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, charSequence112);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F112': "+ unionIndex112));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex113 = (decoder.readIndex());
+        if (unionIndex113 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, null);
+        } else {
+            if (unionIndex113 == 1) {
+                Utf8 charSequence113;
+                Object oldString113 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(113);
+                if (oldString113 instanceof Utf8) {
+                    charSequence113 = (decoder).readString(((Utf8) oldString113));
+                } else {
+                    charSequence113 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, charSequence113);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F113': "+ unionIndex113));
+            }
+        }
+        int unionIndex114 = (decoder.readIndex());
+        if (unionIndex114 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, null);
+        } else {
+            if (unionIndex114 == 1) {
+                Utf8 charSequence114;
+                Object oldString114 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(114);
+                if (oldString114 instanceof Utf8) {
+                    charSequence114 = (decoder).readString(((Utf8) oldString114));
+                } else {
+                    charSequence114 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, charSequence114);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F114': "+ unionIndex114));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex115 = (decoder.readIndex());
+        if (unionIndex115 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, null);
+        } else {
+            if (unionIndex115 == 1) {
+                Utf8 charSequence115;
+                Object oldString115 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(115);
+                if (oldString115 instanceof Utf8) {
+                    charSequence115 = (decoder).readString(((Utf8) oldString115));
+                } else {
+                    charSequence115 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, charSequence115);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F115': "+ unionIndex115));
+            }
+        }
+        int unionIndex116 = (decoder.readIndex());
+        if (unionIndex116 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, null);
+        } else {
+            if (unionIndex116 == 1) {
+                Utf8 charSequence116;
+                Object oldString116 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(116);
+                if (oldString116 instanceof Utf8) {
+                    charSequence116 = (decoder).readString(((Utf8) oldString116));
+                } else {
+                    charSequence116 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, charSequence116);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F116': "+ unionIndex116));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex117 = (decoder.readIndex());
+        if (unionIndex117 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, null);
+        } else {
+            if (unionIndex117 == 1) {
+                Utf8 charSequence117;
+                Object oldString117 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(117);
+                if (oldString117 instanceof Utf8) {
+                    charSequence117 = (decoder).readString(((Utf8) oldString117));
+                } else {
+                    charSequence117 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, charSequence117);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F117': "+ unionIndex117));
+            }
+        }
+        int unionIndex118 = (decoder.readIndex());
+        if (unionIndex118 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, null);
+        } else {
+            if (unionIndex118 == 1) {
+                Utf8 charSequence118;
+                Object oldString118 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(118);
+                if (oldString118 instanceof Utf8) {
+                    charSequence118 = (decoder).readString(((Utf8) oldString118));
+                } else {
+                    charSequence118 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, charSequence118);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F118': "+ unionIndex118));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex119 = (decoder.readIndex());
+        if (unionIndex119 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, null);
+        } else {
+            if (unionIndex119 == 1) {
+                Utf8 charSequence119;
+                Object oldString119 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(119);
+                if (oldString119 instanceof Utf8) {
+                    charSequence119 = (decoder).readString(((Utf8) oldString119));
+                } else {
+                    charSequence119 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, charSequence119);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F119': "+ unionIndex119));
+            }
+        }
+        int unionIndex120 = (decoder.readIndex());
+        if (unionIndex120 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, null);
+        } else {
+            if (unionIndex120 == 1) {
+                Utf8 charSequence120;
+                Object oldString120 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(120);
+                if (oldString120 instanceof Utf8) {
+                    charSequence120 = (decoder).readString(((Utf8) oldString120));
+                } else {
+                    charSequence120 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, charSequence120);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F120': "+ unionIndex120));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex121 = (decoder.readIndex());
+        if (unionIndex121 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, null);
+        } else {
+            if (unionIndex121 == 1) {
+                Utf8 charSequence121;
+                Object oldString121 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(121);
+                if (oldString121 instanceof Utf8) {
+                    charSequence121 = (decoder).readString(((Utf8) oldString121));
+                } else {
+                    charSequence121 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, charSequence121);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F121': "+ unionIndex121));
+            }
+        }
+        int unionIndex122 = (decoder.readIndex());
+        if (unionIndex122 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, null);
+        } else {
+            if (unionIndex122 == 1) {
+                Utf8 charSequence122;
+                Object oldString122 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(122);
+                if (oldString122 instanceof Utf8) {
+                    charSequence122 = (decoder).readString(((Utf8) oldString122));
+                } else {
+                    charSequence122 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, charSequence122);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F122': "+ unionIndex122));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex123 = (decoder.readIndex());
+        if (unionIndex123 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, null);
+        } else {
+            if (unionIndex123 == 1) {
+                Utf8 charSequence123;
+                Object oldString123 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(123);
+                if (oldString123 instanceof Utf8) {
+                    charSequence123 = (decoder).readString(((Utf8) oldString123));
+                } else {
+                    charSequence123 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, charSequence123);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F123': "+ unionIndex123));
+            }
+        }
+        int unionIndex124 = (decoder.readIndex());
+        if (unionIndex124 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, null);
+        } else {
+            if (unionIndex124 == 1) {
+                Utf8 charSequence124;
+                Object oldString124 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(124);
+                if (oldString124 instanceof Utf8) {
+                    charSequence124 = (decoder).readString(((Utf8) oldString124));
+                } else {
+                    charSequence124 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, charSequence124);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F124': "+ unionIndex124));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex125 = (decoder.readIndex());
+        if (unionIndex125 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, null);
+        } else {
+            if (unionIndex125 == 1) {
+                Utf8 charSequence125;
+                Object oldString125 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(125);
+                if (oldString125 instanceof Utf8) {
+                    charSequence125 = (decoder).readString(((Utf8) oldString125));
+                } else {
+                    charSequence125 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, charSequence125);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F125': "+ unionIndex125));
+            }
+        }
+        int unionIndex126 = (decoder.readIndex());
+        if (unionIndex126 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, null);
+        } else {
+            if (unionIndex126 == 1) {
+                Utf8 charSequence126;
+                Object oldString126 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(126);
+                if (oldString126 instanceof Utf8) {
+                    charSequence126 = (decoder).readString(((Utf8) oldString126));
+                } else {
+                    charSequence126 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, charSequence126);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F126': "+ unionIndex126));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex127 = (decoder.readIndex());
+        if (unionIndex127 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, null);
+        } else {
+            if (unionIndex127 == 1) {
+                Utf8 charSequence127;
+                Object oldString127 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(127);
+                if (oldString127 instanceof Utf8) {
+                    charSequence127 = (decoder).readString(((Utf8) oldString127));
+                } else {
+                    charSequence127 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, charSequence127);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F127': "+ unionIndex127));
+            }
+        }
+        int unionIndex128 = (decoder.readIndex());
+        if (unionIndex128 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, null);
+        } else {
+            if (unionIndex128 == 1) {
+                Utf8 charSequence128;
+                Object oldString128 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(128);
+                if (oldString128 instanceof Utf8) {
+                    charSequence128 = (decoder).readString(((Utf8) oldString128));
+                } else {
+                    charSequence128 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, charSequence128);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F128': "+ unionIndex128));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex129 = (decoder.readIndex());
+        if (unionIndex129 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, null);
+        } else {
+            if (unionIndex129 == 1) {
+                Utf8 charSequence129;
+                Object oldString129 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(129);
+                if (oldString129 instanceof Utf8) {
+                    charSequence129 = (decoder).readString(((Utf8) oldString129));
+                } else {
+                    charSequence129 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, charSequence129);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F129': "+ unionIndex129));
+            }
+        }
+        int unionIndex130 = (decoder.readIndex());
+        if (unionIndex130 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, null);
+        } else {
+            if (unionIndex130 == 1) {
+                Utf8 charSequence130;
+                Object oldString130 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(130);
+                if (oldString130 instanceof Utf8) {
+                    charSequence130 = (decoder).readString(((Utf8) oldString130));
+                } else {
+                    charSequence130 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, charSequence130);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F130': "+ unionIndex130));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex131 = (decoder.readIndex());
+        if (unionIndex131 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, null);
+        } else {
+            if (unionIndex131 == 1) {
+                Utf8 charSequence131;
+                Object oldString131 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(131);
+                if (oldString131 instanceof Utf8) {
+                    charSequence131 = (decoder).readString(((Utf8) oldString131));
+                } else {
+                    charSequence131 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, charSequence131);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F131': "+ unionIndex131));
+            }
+        }
+        int unionIndex132 = (decoder.readIndex());
+        if (unionIndex132 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, null);
+        } else {
+            if (unionIndex132 == 1) {
+                Utf8 charSequence132;
+                Object oldString132 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(132);
+                if (oldString132 instanceof Utf8) {
+                    charSequence132 = (decoder).readString(((Utf8) oldString132));
+                } else {
+                    charSequence132 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, charSequence132);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F132': "+ unionIndex132));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex133 = (decoder.readIndex());
+        if (unionIndex133 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, null);
+        } else {
+            if (unionIndex133 == 1) {
+                Utf8 charSequence133;
+                Object oldString133 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(133);
+                if (oldString133 instanceof Utf8) {
+                    charSequence133 = (decoder).readString(((Utf8) oldString133));
+                } else {
+                    charSequence133 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, charSequence133);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F133': "+ unionIndex133));
+            }
+        }
+        int unionIndex134 = (decoder.readIndex());
+        if (unionIndex134 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, null);
+        } else {
+            if (unionIndex134 == 1) {
+                Utf8 charSequence134;
+                Object oldString134 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(134);
+                if (oldString134 instanceof Utf8) {
+                    charSequence134 = (decoder).readString(((Utf8) oldString134));
+                } else {
+                    charSequence134 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, charSequence134);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F134': "+ unionIndex134));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex135 = (decoder.readIndex());
+        if (unionIndex135 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, null);
+        } else {
+            if (unionIndex135 == 1) {
+                Utf8 charSequence135;
+                Object oldString135 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(135);
+                if (oldString135 instanceof Utf8) {
+                    charSequence135 = (decoder).readString(((Utf8) oldString135));
+                } else {
+                    charSequence135 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, charSequence135);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F135': "+ unionIndex135));
+            }
+        }
+        int unionIndex136 = (decoder.readIndex());
+        if (unionIndex136 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, null);
+        } else {
+            if (unionIndex136 == 1) {
+                Utf8 charSequence136;
+                Object oldString136 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(136);
+                if (oldString136 instanceof Utf8) {
+                    charSequence136 = (decoder).readString(((Utf8) oldString136));
+                } else {
+                    charSequence136 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, charSequence136);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F136': "+ unionIndex136));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex137 = (decoder.readIndex());
+        if (unionIndex137 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, null);
+        } else {
+            if (unionIndex137 == 1) {
+                Utf8 charSequence137;
+                Object oldString137 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(137);
+                if (oldString137 instanceof Utf8) {
+                    charSequence137 = (decoder).readString(((Utf8) oldString137));
+                } else {
+                    charSequence137 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, charSequence137);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F137': "+ unionIndex137));
+            }
+        }
+        int unionIndex138 = (decoder.readIndex());
+        if (unionIndex138 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, null);
+        } else {
+            if (unionIndex138 == 1) {
+                Utf8 charSequence138;
+                Object oldString138 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(138);
+                if (oldString138 instanceof Utf8) {
+                    charSequence138 = (decoder).readString(((Utf8) oldString138));
+                } else {
+                    charSequence138 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, charSequence138);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F138': "+ unionIndex138));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex139 = (decoder.readIndex());
+        if (unionIndex139 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, null);
+        } else {
+            if (unionIndex139 == 1) {
+                Utf8 charSequence139;
+                Object oldString139 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(139);
+                if (oldString139 instanceof Utf8) {
+                    charSequence139 = (decoder).readString(((Utf8) oldString139));
+                } else {
+                    charSequence139 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, charSequence139);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F139': "+ unionIndex139));
+            }
+        }
+        int unionIndex140 = (decoder.readIndex());
+        if (unionIndex140 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, null);
+        } else {
+            if (unionIndex140 == 1) {
+                Utf8 charSequence140;
+                Object oldString140 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(140);
+                if (oldString140 instanceof Utf8) {
+                    charSequence140 = (decoder).readString(((Utf8) oldString140));
+                } else {
+                    charSequence140 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, charSequence140);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F140': "+ unionIndex140));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex141 = (decoder.readIndex());
+        if (unionIndex141 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, null);
+        } else {
+            if (unionIndex141 == 1) {
+                Utf8 charSequence141;
+                Object oldString141 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(141);
+                if (oldString141 instanceof Utf8) {
+                    charSequence141 = (decoder).readString(((Utf8) oldString141));
+                } else {
+                    charSequence141 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, charSequence141);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F141': "+ unionIndex141));
+            }
+        }
+        int unionIndex142 = (decoder.readIndex());
+        if (unionIndex142 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, null);
+        } else {
+            if (unionIndex142 == 1) {
+                Utf8 charSequence142;
+                Object oldString142 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(142);
+                if (oldString142 instanceof Utf8) {
+                    charSequence142 = (decoder).readString(((Utf8) oldString142));
+                } else {
+                    charSequence142 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, charSequence142);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F142': "+ unionIndex142));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex143 = (decoder.readIndex());
+        if (unionIndex143 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, null);
+        } else {
+            if (unionIndex143 == 1) {
+                Utf8 charSequence143;
+                Object oldString143 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(143);
+                if (oldString143 instanceof Utf8) {
+                    charSequence143 = (decoder).readString(((Utf8) oldString143));
+                } else {
+                    charSequence143 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, charSequence143);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F143': "+ unionIndex143));
+            }
+        }
+        int unionIndex144 = (decoder.readIndex());
+        if (unionIndex144 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, null);
+        } else {
+            if (unionIndex144 == 1) {
+                Utf8 charSequence144;
+                Object oldString144 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(144);
+                if (oldString144 instanceof Utf8) {
+                    charSequence144 = (decoder).readString(((Utf8) oldString144));
+                } else {
+                    charSequence144 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, charSequence144);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F144': "+ unionIndex144));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex145 = (decoder.readIndex());
+        if (unionIndex145 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, null);
+        } else {
+            if (unionIndex145 == 1) {
+                Utf8 charSequence145;
+                Object oldString145 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(145);
+                if (oldString145 instanceof Utf8) {
+                    charSequence145 = (decoder).readString(((Utf8) oldString145));
+                } else {
+                    charSequence145 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, charSequence145);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F145': "+ unionIndex145));
+            }
+        }
+        int unionIndex146 = (decoder.readIndex());
+        if (unionIndex146 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, null);
+        } else {
+            if (unionIndex146 == 1) {
+                Utf8 charSequence146;
+                Object oldString146 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(146);
+                if (oldString146 instanceof Utf8) {
+                    charSequence146 = (decoder).readString(((Utf8) oldString146));
+                } else {
+                    charSequence146 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, charSequence146);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F146': "+ unionIndex146));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex147 = (decoder.readIndex());
+        if (unionIndex147 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, null);
+        } else {
+            if (unionIndex147 == 1) {
+                Utf8 charSequence147;
+                Object oldString147 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(147);
+                if (oldString147 instanceof Utf8) {
+                    charSequence147 = (decoder).readString(((Utf8) oldString147));
+                } else {
+                    charSequence147 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, charSequence147);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F147': "+ unionIndex147));
+            }
+        }
+        int unionIndex148 = (decoder.readIndex());
+        if (unionIndex148 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, null);
+        } else {
+            if (unionIndex148 == 1) {
+                Utf8 charSequence148;
+                Object oldString148 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(148);
+                if (oldString148 instanceof Utf8) {
+                    charSequence148 = (decoder).readString(((Utf8) oldString148));
+                } else {
+                    charSequence148 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, charSequence148);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F148': "+ unionIndex148));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex149 = (decoder.readIndex());
+        if (unionIndex149 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, null);
+        } else {
+            if (unionIndex149 == 1) {
+                Utf8 charSequence149;
+                Object oldString149 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(149);
+                if (oldString149 instanceof Utf8) {
+                    charSequence149 = (decoder).readString(((Utf8) oldString149));
+                } else {
+                    charSequence149 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, charSequence149);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F149': "+ unionIndex149));
+            }
+        }
+        int unionIndex150 = (decoder.readIndex());
+        if (unionIndex150 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, null);
+        } else {
+            if (unionIndex150 == 1) {
+                Utf8 charSequence150;
+                Object oldString150 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(150);
+                if (oldString150 instanceof Utf8) {
+                    charSequence150 = (decoder).readString(((Utf8) oldString150));
+                } else {
+                    charSequence150 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, charSequence150);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F150': "+ unionIndex150));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex151 = (decoder.readIndex());
+        if (unionIndex151 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, null);
+        } else {
+            if (unionIndex151 == 1) {
+                Utf8 charSequence151;
+                Object oldString151 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(151);
+                if (oldString151 instanceof Utf8) {
+                    charSequence151 = (decoder).readString(((Utf8) oldString151));
+                } else {
+                    charSequence151 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, charSequence151);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F151': "+ unionIndex151));
+            }
+        }
+        int unionIndex152 = (decoder.readIndex());
+        if (unionIndex152 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, null);
+        } else {
+            if (unionIndex152 == 1) {
+                Utf8 charSequence152;
+                Object oldString152 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(152);
+                if (oldString152 instanceof Utf8) {
+                    charSequence152 = (decoder).readString(((Utf8) oldString152));
+                } else {
+                    charSequence152 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, charSequence152);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F152': "+ unionIndex152));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex153 = (decoder.readIndex());
+        if (unionIndex153 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, null);
+        } else {
+            if (unionIndex153 == 1) {
+                Utf8 charSequence153;
+                Object oldString153 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(153);
+                if (oldString153 instanceof Utf8) {
+                    charSequence153 = (decoder).readString(((Utf8) oldString153));
+                } else {
+                    charSequence153 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, charSequence153);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F153': "+ unionIndex153));
+            }
+        }
+        int unionIndex154 = (decoder.readIndex());
+        if (unionIndex154 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, null);
+        } else {
+            if (unionIndex154 == 1) {
+                Utf8 charSequence154;
+                Object oldString154 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(154);
+                if (oldString154 instanceof Utf8) {
+                    charSequence154 = (decoder).readString(((Utf8) oldString154));
+                } else {
+                    charSequence154 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, charSequence154);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F154': "+ unionIndex154));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex155 = (decoder.readIndex());
+        if (unionIndex155 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, null);
+        } else {
+            if (unionIndex155 == 1) {
+                Utf8 charSequence155;
+                Object oldString155 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(155);
+                if (oldString155 instanceof Utf8) {
+                    charSequence155 = (decoder).readString(((Utf8) oldString155));
+                } else {
+                    charSequence155 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, charSequence155);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F155': "+ unionIndex155));
+            }
+        }
+        int unionIndex156 = (decoder.readIndex());
+        if (unionIndex156 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, null);
+        } else {
+            if (unionIndex156 == 1) {
+                Utf8 charSequence156;
+                Object oldString156 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(156);
+                if (oldString156 instanceof Utf8) {
+                    charSequence156 = (decoder).readString(((Utf8) oldString156));
+                } else {
+                    charSequence156 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, charSequence156);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F156': "+ unionIndex156));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex157 = (decoder.readIndex());
+        if (unionIndex157 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, null);
+        } else {
+            if (unionIndex157 == 1) {
+                Utf8 charSequence157;
+                Object oldString157 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(157);
+                if (oldString157 instanceof Utf8) {
+                    charSequence157 = (decoder).readString(((Utf8) oldString157));
+                } else {
+                    charSequence157 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, charSequence157);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F157': "+ unionIndex157));
+            }
+        }
+        int unionIndex158 = (decoder.readIndex());
+        if (unionIndex158 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, null);
+        } else {
+            if (unionIndex158 == 1) {
+                Utf8 charSequence158;
+                Object oldString158 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(158);
+                if (oldString158 instanceof Utf8) {
+                    charSequence158 = (decoder).readString(((Utf8) oldString158));
+                } else {
+                    charSequence158 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, charSequence158);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F158': "+ unionIndex158));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex159 = (decoder.readIndex());
+        if (unionIndex159 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, null);
+        } else {
+            if (unionIndex159 == 1) {
+                Utf8 charSequence159;
+                Object oldString159 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(159);
+                if (oldString159 instanceof Utf8) {
+                    charSequence159 = (decoder).readString(((Utf8) oldString159));
+                } else {
+                    charSequence159 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, charSequence159);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F159': "+ unionIndex159));
+            }
+        }
+        int unionIndex160 = (decoder.readIndex());
+        if (unionIndex160 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, null);
+        } else {
+            if (unionIndex160 == 1) {
+                Utf8 charSequence160;
+                Object oldString160 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(160);
+                if (oldString160 instanceof Utf8) {
+                    charSequence160 = (decoder).readString(((Utf8) oldString160));
+                } else {
+                    charSequence160 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, charSequence160);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F160': "+ unionIndex160));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex161 = (decoder.readIndex());
+        if (unionIndex161 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, null);
+        } else {
+            if (unionIndex161 == 1) {
+                Utf8 charSequence161;
+                Object oldString161 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(161);
+                if (oldString161 instanceof Utf8) {
+                    charSequence161 = (decoder).readString(((Utf8) oldString161));
+                } else {
+                    charSequence161 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, charSequence161);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F161': "+ unionIndex161));
+            }
+        }
+        int unionIndex162 = (decoder.readIndex());
+        if (unionIndex162 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, null);
+        } else {
+            if (unionIndex162 == 1) {
+                Utf8 charSequence162;
+                Object oldString162 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(162);
+                if (oldString162 instanceof Utf8) {
+                    charSequence162 = (decoder).readString(((Utf8) oldString162));
+                } else {
+                    charSequence162 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, charSequence162);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F162': "+ unionIndex162));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex163 = (decoder.readIndex());
+        if (unionIndex163 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, null);
+        } else {
+            if (unionIndex163 == 1) {
+                Utf8 charSequence163;
+                Object oldString163 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(163);
+                if (oldString163 instanceof Utf8) {
+                    charSequence163 = (decoder).readString(((Utf8) oldString163));
+                } else {
+                    charSequence163 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, charSequence163);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F163': "+ unionIndex163));
+            }
+        }
+        int unionIndex164 = (decoder.readIndex());
+        if (unionIndex164 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, null);
+        } else {
+            if (unionIndex164 == 1) {
+                Utf8 charSequence164;
+                Object oldString164 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(164);
+                if (oldString164 instanceof Utf8) {
+                    charSequence164 = (decoder).readString(((Utf8) oldString164));
+                } else {
+                    charSequence164 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, charSequence164);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F164': "+ unionIndex164));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex165 = (decoder.readIndex());
+        if (unionIndex165 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, null);
+        } else {
+            if (unionIndex165 == 1) {
+                Utf8 charSequence165;
+                Object oldString165 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(165);
+                if (oldString165 instanceof Utf8) {
+                    charSequence165 = (decoder).readString(((Utf8) oldString165));
+                } else {
+                    charSequence165 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, charSequence165);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F165': "+ unionIndex165));
+            }
+        }
+        int unionIndex166 = (decoder.readIndex());
+        if (unionIndex166 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, null);
+        } else {
+            if (unionIndex166 == 1) {
+                Utf8 charSequence166;
+                Object oldString166 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(166);
+                if (oldString166 instanceof Utf8) {
+                    charSequence166 = (decoder).readString(((Utf8) oldString166));
+                } else {
+                    charSequence166 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, charSequence166);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F166': "+ unionIndex166));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex167 = (decoder.readIndex());
+        if (unionIndex167 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, null);
+        } else {
+            if (unionIndex167 == 1) {
+                Utf8 charSequence167;
+                Object oldString167 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(167);
+                if (oldString167 instanceof Utf8) {
+                    charSequence167 = (decoder).readString(((Utf8) oldString167));
+                } else {
+                    charSequence167 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, charSequence167);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F167': "+ unionIndex167));
+            }
+        }
+        int unionIndex168 = (decoder.readIndex());
+        if (unionIndex168 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, null);
+        } else {
+            if (unionIndex168 == 1) {
+                Utf8 charSequence168;
+                Object oldString168 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(168);
+                if (oldString168 instanceof Utf8) {
+                    charSequence168 = (decoder).readString(((Utf8) oldString168));
+                } else {
+                    charSequence168 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, charSequence168);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F168': "+ unionIndex168));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex169 = (decoder.readIndex());
+        if (unionIndex169 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, null);
+        } else {
+            if (unionIndex169 == 1) {
+                Utf8 charSequence169;
+                Object oldString169 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(169);
+                if (oldString169 instanceof Utf8) {
+                    charSequence169 = (decoder).readString(((Utf8) oldString169));
+                } else {
+                    charSequence169 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, charSequence169);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F169': "+ unionIndex169));
+            }
+        }
+        int unionIndex170 = (decoder.readIndex());
+        if (unionIndex170 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, null);
+        } else {
+            if (unionIndex170 == 1) {
+                Utf8 charSequence170;
+                Object oldString170 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(170);
+                if (oldString170 instanceof Utf8) {
+                    charSequence170 = (decoder).readString(((Utf8) oldString170));
+                } else {
+                    charSequence170 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, charSequence170);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F170': "+ unionIndex170));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex171 = (decoder.readIndex());
+        if (unionIndex171 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, null);
+        } else {
+            if (unionIndex171 == 1) {
+                Utf8 charSequence171;
+                Object oldString171 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(171);
+                if (oldString171 instanceof Utf8) {
+                    charSequence171 = (decoder).readString(((Utf8) oldString171));
+                } else {
+                    charSequence171 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, charSequence171);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F171': "+ unionIndex171));
+            }
+        }
+        int unionIndex172 = (decoder.readIndex());
+        if (unionIndex172 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, null);
+        } else {
+            if (unionIndex172 == 1) {
+                Utf8 charSequence172;
+                Object oldString172 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(172);
+                if (oldString172 instanceof Utf8) {
+                    charSequence172 = (decoder).readString(((Utf8) oldString172));
+                } else {
+                    charSequence172 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, charSequence172);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F172': "+ unionIndex172));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex173 = (decoder.readIndex());
+        if (unionIndex173 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, null);
+        } else {
+            if (unionIndex173 == 1) {
+                Utf8 charSequence173;
+                Object oldString173 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(173);
+                if (oldString173 instanceof Utf8) {
+                    charSequence173 = (decoder).readString(((Utf8) oldString173));
+                } else {
+                    charSequence173 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, charSequence173);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F173': "+ unionIndex173));
+            }
+        }
+        int unionIndex174 = (decoder.readIndex());
+        if (unionIndex174 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, null);
+        } else {
+            if (unionIndex174 == 1) {
+                Utf8 charSequence174;
+                Object oldString174 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(174);
+                if (oldString174 instanceof Utf8) {
+                    charSequence174 = (decoder).readString(((Utf8) oldString174));
+                } else {
+                    charSequence174 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, charSequence174);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F174': "+ unionIndex174));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex175 = (decoder.readIndex());
+        if (unionIndex175 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, null);
+        } else {
+            if (unionIndex175 == 1) {
+                Utf8 charSequence175;
+                Object oldString175 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(175);
+                if (oldString175 instanceof Utf8) {
+                    charSequence175 = (decoder).readString(((Utf8) oldString175));
+                } else {
+                    charSequence175 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, charSequence175);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F175': "+ unionIndex175));
+            }
+        }
+        int unionIndex176 = (decoder.readIndex());
+        if (unionIndex176 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, null);
+        } else {
+            if (unionIndex176 == 1) {
+                Utf8 charSequence176;
+                Object oldString176 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(176);
+                if (oldString176 instanceof Utf8) {
+                    charSequence176 = (decoder).readString(((Utf8) oldString176));
+                } else {
+                    charSequence176 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, charSequence176);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F176': "+ unionIndex176));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex177 = (decoder.readIndex());
+        if (unionIndex177 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, null);
+        } else {
+            if (unionIndex177 == 1) {
+                Utf8 charSequence177;
+                Object oldString177 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(177);
+                if (oldString177 instanceof Utf8) {
+                    charSequence177 = (decoder).readString(((Utf8) oldString177));
+                } else {
+                    charSequence177 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, charSequence177);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F177': "+ unionIndex177));
+            }
+        }
+        int unionIndex178 = (decoder.readIndex());
+        if (unionIndex178 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, null);
+        } else {
+            if (unionIndex178 == 1) {
+                Utf8 charSequence178;
+                Object oldString178 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(178);
+                if (oldString178 instanceof Utf8) {
+                    charSequence178 = (decoder).readString(((Utf8) oldString178));
+                } else {
+                    charSequence178 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, charSequence178);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F178': "+ unionIndex178));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex179 = (decoder.readIndex());
+        if (unionIndex179 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, null);
+        } else {
+            if (unionIndex179 == 1) {
+                Utf8 charSequence179;
+                Object oldString179 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(179);
+                if (oldString179 instanceof Utf8) {
+                    charSequence179 = (decoder).readString(((Utf8) oldString179));
+                } else {
+                    charSequence179 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, charSequence179);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F179': "+ unionIndex179));
+            }
+        }
+        int unionIndex180 = (decoder.readIndex());
+        if (unionIndex180 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, null);
+        } else {
+            if (unionIndex180 == 1) {
+                Utf8 charSequence180;
+                Object oldString180 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(180);
+                if (oldString180 instanceof Utf8) {
+                    charSequence180 = (decoder).readString(((Utf8) oldString180));
+                } else {
+                    charSequence180 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, charSequence180);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F180': "+ unionIndex180));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex181 = (decoder.readIndex());
+        if (unionIndex181 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, null);
+        } else {
+            if (unionIndex181 == 1) {
+                Utf8 charSequence181;
+                Object oldString181 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(181);
+                if (oldString181 instanceof Utf8) {
+                    charSequence181 = (decoder).readString(((Utf8) oldString181));
+                } else {
+                    charSequence181 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, charSequence181);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F181': "+ unionIndex181));
+            }
+        }
+        int unionIndex182 = (decoder.readIndex());
+        if (unionIndex182 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, null);
+        } else {
+            if (unionIndex182 == 1) {
+                Utf8 charSequence182;
+                Object oldString182 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(182);
+                if (oldString182 instanceof Utf8) {
+                    charSequence182 = (decoder).readString(((Utf8) oldString182));
+                } else {
+                    charSequence182 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, charSequence182);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F182': "+ unionIndex182));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex183 = (decoder.readIndex());
+        if (unionIndex183 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, null);
+        } else {
+            if (unionIndex183 == 1) {
+                Utf8 charSequence183;
+                Object oldString183 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(183);
+                if (oldString183 instanceof Utf8) {
+                    charSequence183 = (decoder).readString(((Utf8) oldString183));
+                } else {
+                    charSequence183 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, charSequence183);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F183': "+ unionIndex183));
+            }
+        }
+        int unionIndex184 = (decoder.readIndex());
+        if (unionIndex184 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, null);
+        } else {
+            if (unionIndex184 == 1) {
+                Utf8 charSequence184;
+                Object oldString184 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(184);
+                if (oldString184 instanceof Utf8) {
+                    charSequence184 = (decoder).readString(((Utf8) oldString184));
+                } else {
+                    charSequence184 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, charSequence184);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F184': "+ unionIndex184));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex185 = (decoder.readIndex());
+        if (unionIndex185 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, null);
+        } else {
+            if (unionIndex185 == 1) {
+                Utf8 charSequence185;
+                Object oldString185 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(185);
+                if (oldString185 instanceof Utf8) {
+                    charSequence185 = (decoder).readString(((Utf8) oldString185));
+                } else {
+                    charSequence185 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, charSequence185);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F185': "+ unionIndex185));
+            }
+        }
+        int unionIndex186 = (decoder.readIndex());
+        if (unionIndex186 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, null);
+        } else {
+            if (unionIndex186 == 1) {
+                Utf8 charSequence186;
+                Object oldString186 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(186);
+                if (oldString186 instanceof Utf8) {
+                    charSequence186 = (decoder).readString(((Utf8) oldString186));
+                } else {
+                    charSequence186 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, charSequence186);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F186': "+ unionIndex186));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex187 = (decoder.readIndex());
+        if (unionIndex187 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, null);
+        } else {
+            if (unionIndex187 == 1) {
+                Utf8 charSequence187;
+                Object oldString187 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(187);
+                if (oldString187 instanceof Utf8) {
+                    charSequence187 = (decoder).readString(((Utf8) oldString187));
+                } else {
+                    charSequence187 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, charSequence187);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F187': "+ unionIndex187));
+            }
+        }
+        int unionIndex188 = (decoder.readIndex());
+        if (unionIndex188 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, null);
+        } else {
+            if (unionIndex188 == 1) {
+                Utf8 charSequence188;
+                Object oldString188 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(188);
+                if (oldString188 instanceof Utf8) {
+                    charSequence188 = (decoder).readString(((Utf8) oldString188));
+                } else {
+                    charSequence188 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, charSequence188);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F188': "+ unionIndex188));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex189 = (decoder.readIndex());
+        if (unionIndex189 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, null);
+        } else {
+            if (unionIndex189 == 1) {
+                Utf8 charSequence189;
+                Object oldString189 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(189);
+                if (oldString189 instanceof Utf8) {
+                    charSequence189 = (decoder).readString(((Utf8) oldString189));
+                } else {
+                    charSequence189 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, charSequence189);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F189': "+ unionIndex189));
+            }
+        }
+        int unionIndex190 = (decoder.readIndex());
+        if (unionIndex190 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, null);
+        } else {
+            if (unionIndex190 == 1) {
+                Utf8 charSequence190;
+                Object oldString190 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(190);
+                if (oldString190 instanceof Utf8) {
+                    charSequence190 = (decoder).readString(((Utf8) oldString190));
+                } else {
+                    charSequence190 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, charSequence190);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F190': "+ unionIndex190));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex191 = (decoder.readIndex());
+        if (unionIndex191 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, null);
+        } else {
+            if (unionIndex191 == 1) {
+                Utf8 charSequence191;
+                Object oldString191 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(191);
+                if (oldString191 instanceof Utf8) {
+                    charSequence191 = (decoder).readString(((Utf8) oldString191));
+                } else {
+                    charSequence191 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, charSequence191);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F191': "+ unionIndex191));
+            }
+        }
+        int unionIndex192 = (decoder.readIndex());
+        if (unionIndex192 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, null);
+        } else {
+            if (unionIndex192 == 1) {
+                Utf8 charSequence192;
+                Object oldString192 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(192);
+                if (oldString192 instanceof Utf8) {
+                    charSequence192 = (decoder).readString(((Utf8) oldString192));
+                } else {
+                    charSequence192 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, charSequence192);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F192': "+ unionIndex192));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex193 = (decoder.readIndex());
+        if (unionIndex193 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, null);
+        } else {
+            if (unionIndex193 == 1) {
+                Utf8 charSequence193;
+                Object oldString193 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(193);
+                if (oldString193 instanceof Utf8) {
+                    charSequence193 = (decoder).readString(((Utf8) oldString193));
+                } else {
+                    charSequence193 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, charSequence193);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F193': "+ unionIndex193));
+            }
+        }
+        int unionIndex194 = (decoder.readIndex());
+        if (unionIndex194 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, null);
+        } else {
+            if (unionIndex194 == 1) {
+                Utf8 charSequence194;
+                Object oldString194 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(194);
+                if (oldString194 instanceof Utf8) {
+                    charSequence194 = (decoder).readString(((Utf8) oldString194));
+                } else {
+                    charSequence194 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, charSequence194);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F194': "+ unionIndex194));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex195 = (decoder.readIndex());
+        if (unionIndex195 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, null);
+        } else {
+            if (unionIndex195 == 1) {
+                Utf8 charSequence195;
+                Object oldString195 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(195);
+                if (oldString195 instanceof Utf8) {
+                    charSequence195 = (decoder).readString(((Utf8) oldString195));
+                } else {
+                    charSequence195 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, charSequence195);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F195': "+ unionIndex195));
+            }
+        }
+        int unionIndex196 = (decoder.readIndex());
+        if (unionIndex196 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, null);
+        } else {
+            if (unionIndex196 == 1) {
+                Utf8 charSequence196;
+                Object oldString196 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(196);
+                if (oldString196 instanceof Utf8) {
+                    charSequence196 = (decoder).readString(((Utf8) oldString196));
+                } else {
+                    charSequence196 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, charSequence196);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F196': "+ unionIndex196));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex197 = (decoder.readIndex());
+        if (unionIndex197 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, null);
+        } else {
+            if (unionIndex197 == 1) {
+                Utf8 charSequence197;
+                Object oldString197 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(197);
+                if (oldString197 instanceof Utf8) {
+                    charSequence197 = (decoder).readString(((Utf8) oldString197));
+                } else {
+                    charSequence197 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, charSequence197);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F197': "+ unionIndex197));
+            }
+        }
+        int unionIndex198 = (decoder.readIndex());
+        if (unionIndex198 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, null);
+        } else {
+            if (unionIndex198 == 1) {
+                Utf8 charSequence198;
+                Object oldString198 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(198);
+                if (oldString198 instanceof Utf8) {
+                    charSequence198 = (decoder).readString(((Utf8) oldString198));
+                } else {
+                    charSequence198 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, charSequence198);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F198': "+ unionIndex198));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex199 = (decoder.readIndex());
+        if (unionIndex199 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, null);
+        } else {
+            if (unionIndex199 == 1) {
+                Utf8 charSequence199;
+                Object oldString199 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(199);
+                if (oldString199 instanceof Utf8) {
+                    charSequence199 = (decoder).readString(((Utf8) oldString199));
+                } else {
+                    charSequence199 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, charSequence199);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F199': "+ unionIndex199));
+            }
+        }
+        int unionIndex200 = (decoder.readIndex());
+        if (unionIndex200 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, null);
+        } else {
+            if (unionIndex200 == 1) {
+                Utf8 charSequence200;
+                Object oldString200 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(200);
+                if (oldString200 instanceof Utf8) {
+                    charSequence200 = (decoder).readString(((Utf8) oldString200));
+                } else {
+                    charSequence200 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, charSequence200);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F200': "+ unionIndex200));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex201 = (decoder.readIndex());
+        if (unionIndex201 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, null);
+        } else {
+            if (unionIndex201 == 1) {
+                Utf8 charSequence201;
+                Object oldString201 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(201);
+                if (oldString201 instanceof Utf8) {
+                    charSequence201 = (decoder).readString(((Utf8) oldString201));
+                } else {
+                    charSequence201 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, charSequence201);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F201': "+ unionIndex201));
+            }
+        }
+        int unionIndex202 = (decoder.readIndex());
+        if (unionIndex202 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, null);
+        } else {
+            if (unionIndex202 == 1) {
+                Utf8 charSequence202;
+                Object oldString202 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(202);
+                if (oldString202 instanceof Utf8) {
+                    charSequence202 = (decoder).readString(((Utf8) oldString202));
+                } else {
+                    charSequence202 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, charSequence202);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F202': "+ unionIndex202));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex203 = (decoder.readIndex());
+        if (unionIndex203 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, null);
+        } else {
+            if (unionIndex203 == 1) {
+                Utf8 charSequence203;
+                Object oldString203 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(203);
+                if (oldString203 instanceof Utf8) {
+                    charSequence203 = (decoder).readString(((Utf8) oldString203));
+                } else {
+                    charSequence203 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, charSequence203);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F203': "+ unionIndex203));
+            }
+        }
+        int unionIndex204 = (decoder.readIndex());
+        if (unionIndex204 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, null);
+        } else {
+            if (unionIndex204 == 1) {
+                Utf8 charSequence204;
+                Object oldString204 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(204);
+                if (oldString204 instanceof Utf8) {
+                    charSequence204 = (decoder).readString(((Utf8) oldString204));
+                } else {
+                    charSequence204 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, charSequence204);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F204': "+ unionIndex204));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex205 = (decoder.readIndex());
+        if (unionIndex205 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, null);
+        } else {
+            if (unionIndex205 == 1) {
+                Utf8 charSequence205;
+                Object oldString205 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(205);
+                if (oldString205 instanceof Utf8) {
+                    charSequence205 = (decoder).readString(((Utf8) oldString205));
+                } else {
+                    charSequence205 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, charSequence205);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F205': "+ unionIndex205));
+            }
+        }
+        int unionIndex206 = (decoder.readIndex());
+        if (unionIndex206 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, null);
+        } else {
+            if (unionIndex206 == 1) {
+                Utf8 charSequence206;
+                Object oldString206 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(206);
+                if (oldString206 instanceof Utf8) {
+                    charSequence206 = (decoder).readString(((Utf8) oldString206));
+                } else {
+                    charSequence206 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, charSequence206);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F206': "+ unionIndex206));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex207 = (decoder.readIndex());
+        if (unionIndex207 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, null);
+        } else {
+            if (unionIndex207 == 1) {
+                Utf8 charSequence207;
+                Object oldString207 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(207);
+                if (oldString207 instanceof Utf8) {
+                    charSequence207 = (decoder).readString(((Utf8) oldString207));
+                } else {
+                    charSequence207 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, charSequence207);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F207': "+ unionIndex207));
+            }
+        }
+        int unionIndex208 = (decoder.readIndex());
+        if (unionIndex208 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, null);
+        } else {
+            if (unionIndex208 == 1) {
+                Utf8 charSequence208;
+                Object oldString208 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(208);
+                if (oldString208 instanceof Utf8) {
+                    charSequence208 = (decoder).readString(((Utf8) oldString208));
+                } else {
+                    charSequence208 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, charSequence208);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F208': "+ unionIndex208));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex209 = (decoder.readIndex());
+        if (unionIndex209 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, null);
+        } else {
+            if (unionIndex209 == 1) {
+                Utf8 charSequence209;
+                Object oldString209 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(209);
+                if (oldString209 instanceof Utf8) {
+                    charSequence209 = (decoder).readString(((Utf8) oldString209));
+                } else {
+                    charSequence209 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, charSequence209);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F209': "+ unionIndex209));
+            }
+        }
+        int unionIndex210 = (decoder.readIndex());
+        if (unionIndex210 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, null);
+        } else {
+            if (unionIndex210 == 1) {
+                Utf8 charSequence210;
+                Object oldString210 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(210);
+                if (oldString210 instanceof Utf8) {
+                    charSequence210 = (decoder).readString(((Utf8) oldString210));
+                } else {
+                    charSequence210 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, charSequence210);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F210': "+ unionIndex210));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex211 = (decoder.readIndex());
+        if (unionIndex211 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, null);
+        } else {
+            if (unionIndex211 == 1) {
+                Utf8 charSequence211;
+                Object oldString211 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(211);
+                if (oldString211 instanceof Utf8) {
+                    charSequence211 = (decoder).readString(((Utf8) oldString211));
+                } else {
+                    charSequence211 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, charSequence211);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F211': "+ unionIndex211));
+            }
+        }
+        int unionIndex212 = (decoder.readIndex());
+        if (unionIndex212 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, null);
+        } else {
+            if (unionIndex212 == 1) {
+                Utf8 charSequence212;
+                Object oldString212 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(212);
+                if (oldString212 instanceof Utf8) {
+                    charSequence212 = (decoder).readString(((Utf8) oldString212));
+                } else {
+                    charSequence212 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, charSequence212);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F212': "+ unionIndex212));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex213 = (decoder.readIndex());
+        if (unionIndex213 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, null);
+        } else {
+            if (unionIndex213 == 1) {
+                Utf8 charSequence213;
+                Object oldString213 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(213);
+                if (oldString213 instanceof Utf8) {
+                    charSequence213 = (decoder).readString(((Utf8) oldString213));
+                } else {
+                    charSequence213 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, charSequence213);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F213': "+ unionIndex213));
+            }
+        }
+        int unionIndex214 = (decoder.readIndex());
+        if (unionIndex214 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, null);
+        } else {
+            if (unionIndex214 == 1) {
+                Utf8 charSequence214;
+                Object oldString214 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(214);
+                if (oldString214 instanceof Utf8) {
+                    charSequence214 = (decoder).readString(((Utf8) oldString214));
+                } else {
+                    charSequence214 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, charSequence214);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F214': "+ unionIndex214));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex215 = (decoder.readIndex());
+        if (unionIndex215 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, null);
+        } else {
+            if (unionIndex215 == 1) {
+                Utf8 charSequence215;
+                Object oldString215 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(215);
+                if (oldString215 instanceof Utf8) {
+                    charSequence215 = (decoder).readString(((Utf8) oldString215));
+                } else {
+                    charSequence215 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, charSequence215);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F215': "+ unionIndex215));
+            }
+        }
+        int unionIndex216 = (decoder.readIndex());
+        if (unionIndex216 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, null);
+        } else {
+            if (unionIndex216 == 1) {
+                Utf8 charSequence216;
+                Object oldString216 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(216);
+                if (oldString216 instanceof Utf8) {
+                    charSequence216 = (decoder).readString(((Utf8) oldString216));
+                } else {
+                    charSequence216 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, charSequence216);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F216': "+ unionIndex216));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex217 = (decoder.readIndex());
+        if (unionIndex217 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, null);
+        } else {
+            if (unionIndex217 == 1) {
+                Utf8 charSequence217;
+                Object oldString217 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(217);
+                if (oldString217 instanceof Utf8) {
+                    charSequence217 = (decoder).readString(((Utf8) oldString217));
+                } else {
+                    charSequence217 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, charSequence217);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F217': "+ unionIndex217));
+            }
+        }
+        int unionIndex218 = (decoder.readIndex());
+        if (unionIndex218 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, null);
+        } else {
+            if (unionIndex218 == 1) {
+                Utf8 charSequence218;
+                Object oldString218 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(218);
+                if (oldString218 instanceof Utf8) {
+                    charSequence218 = (decoder).readString(((Utf8) oldString218));
+                } else {
+                    charSequence218 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, charSequence218);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F218': "+ unionIndex218));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex219 = (decoder.readIndex());
+        if (unionIndex219 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, null);
+        } else {
+            if (unionIndex219 == 1) {
+                Utf8 charSequence219;
+                Object oldString219 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(219);
+                if (oldString219 instanceof Utf8) {
+                    charSequence219 = (decoder).readString(((Utf8) oldString219));
+                } else {
+                    charSequence219 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, charSequence219);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F219': "+ unionIndex219));
+            }
+        }
+        int unionIndex220 = (decoder.readIndex());
+        if (unionIndex220 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, null);
+        } else {
+            if (unionIndex220 == 1) {
+                Utf8 charSequence220;
+                Object oldString220 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(220);
+                if (oldString220 instanceof Utf8) {
+                    charSequence220 = (decoder).readString(((Utf8) oldString220));
+                } else {
+                    charSequence220 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, charSequence220);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F220': "+ unionIndex220));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex221 = (decoder.readIndex());
+        if (unionIndex221 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, null);
+        } else {
+            if (unionIndex221 == 1) {
+                Utf8 charSequence221;
+                Object oldString221 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(221);
+                if (oldString221 instanceof Utf8) {
+                    charSequence221 = (decoder).readString(((Utf8) oldString221));
+                } else {
+                    charSequence221 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, charSequence221);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F221': "+ unionIndex221));
+            }
+        }
+        int unionIndex222 = (decoder.readIndex());
+        if (unionIndex222 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, null);
+        } else {
+            if (unionIndex222 == 1) {
+                Utf8 charSequence222;
+                Object oldString222 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(222);
+                if (oldString222 instanceof Utf8) {
+                    charSequence222 = (decoder).readString(((Utf8) oldString222));
+                } else {
+                    charSequence222 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, charSequence222);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F222': "+ unionIndex222));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex223 = (decoder.readIndex());
+        if (unionIndex223 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, null);
+        } else {
+            if (unionIndex223 == 1) {
+                Utf8 charSequence223;
+                Object oldString223 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(223);
+                if (oldString223 instanceof Utf8) {
+                    charSequence223 = (decoder).readString(((Utf8) oldString223));
+                } else {
+                    charSequence223 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, charSequence223);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F223': "+ unionIndex223));
+            }
+        }
+        int unionIndex224 = (decoder.readIndex());
+        if (unionIndex224 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, null);
+        } else {
+            if (unionIndex224 == 1) {
+                Utf8 charSequence224;
+                Object oldString224 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(224);
+                if (oldString224 instanceof Utf8) {
+                    charSequence224 = (decoder).readString(((Utf8) oldString224));
+                } else {
+                    charSequence224 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, charSequence224);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F224': "+ unionIndex224));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex225 = (decoder.readIndex());
+        if (unionIndex225 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, null);
+        } else {
+            if (unionIndex225 == 1) {
+                Utf8 charSequence225;
+                Object oldString225 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(225);
+                if (oldString225 instanceof Utf8) {
+                    charSequence225 = (decoder).readString(((Utf8) oldString225));
+                } else {
+                    charSequence225 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, charSequence225);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F225': "+ unionIndex225));
+            }
+        }
+        int unionIndex226 = (decoder.readIndex());
+        if (unionIndex226 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, null);
+        } else {
+            if (unionIndex226 == 1) {
+                Utf8 charSequence226;
+                Object oldString226 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(226);
+                if (oldString226 instanceof Utf8) {
+                    charSequence226 = (decoder).readString(((Utf8) oldString226));
+                } else {
+                    charSequence226 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, charSequence226);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F226': "+ unionIndex226));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex227 = (decoder.readIndex());
+        if (unionIndex227 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, null);
+        } else {
+            if (unionIndex227 == 1) {
+                Utf8 charSequence227;
+                Object oldString227 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(227);
+                if (oldString227 instanceof Utf8) {
+                    charSequence227 = (decoder).readString(((Utf8) oldString227));
+                } else {
+                    charSequence227 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, charSequence227);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F227': "+ unionIndex227));
+            }
+        }
+        int unionIndex228 = (decoder.readIndex());
+        if (unionIndex228 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, null);
+        } else {
+            if (unionIndex228 == 1) {
+                Utf8 charSequence228;
+                Object oldString228 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(228);
+                if (oldString228 instanceof Utf8) {
+                    charSequence228 = (decoder).readString(((Utf8) oldString228));
+                } else {
+                    charSequence228 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, charSequence228);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F228': "+ unionIndex228));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex229 = (decoder.readIndex());
+        if (unionIndex229 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, null);
+        } else {
+            if (unionIndex229 == 1) {
+                Utf8 charSequence229;
+                Object oldString229 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(229);
+                if (oldString229 instanceof Utf8) {
+                    charSequence229 = (decoder).readString(((Utf8) oldString229));
+                } else {
+                    charSequence229 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, charSequence229);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F229': "+ unionIndex229));
+            }
+        }
+        int unionIndex230 = (decoder.readIndex());
+        if (unionIndex230 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, null);
+        } else {
+            if (unionIndex230 == 1) {
+                Utf8 charSequence230;
+                Object oldString230 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(230);
+                if (oldString230 instanceof Utf8) {
+                    charSequence230 = (decoder).readString(((Utf8) oldString230));
+                } else {
+                    charSequence230 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, charSequence230);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F230': "+ unionIndex230));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex231 = (decoder.readIndex());
+        if (unionIndex231 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, null);
+        } else {
+            if (unionIndex231 == 1) {
+                Utf8 charSequence231;
+                Object oldString231 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(231);
+                if (oldString231 instanceof Utf8) {
+                    charSequence231 = (decoder).readString(((Utf8) oldString231));
+                } else {
+                    charSequence231 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, charSequence231);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F231': "+ unionIndex231));
+            }
+        }
+        int unionIndex232 = (decoder.readIndex());
+        if (unionIndex232 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, null);
+        } else {
+            if (unionIndex232 == 1) {
+                Utf8 charSequence232;
+                Object oldString232 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(232);
+                if (oldString232 instanceof Utf8) {
+                    charSequence232 = (decoder).readString(((Utf8) oldString232));
+                } else {
+                    charSequence232 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, charSequence232);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F232': "+ unionIndex232));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex233 = (decoder.readIndex());
+        if (unionIndex233 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, null);
+        } else {
+            if (unionIndex233 == 1) {
+                Utf8 charSequence233;
+                Object oldString233 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(233);
+                if (oldString233 instanceof Utf8) {
+                    charSequence233 = (decoder).readString(((Utf8) oldString233));
+                } else {
+                    charSequence233 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, charSequence233);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F233': "+ unionIndex233));
+            }
+        }
+        int unionIndex234 = (decoder.readIndex());
+        if (unionIndex234 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, null);
+        } else {
+            if (unionIndex234 == 1) {
+                Utf8 charSequence234;
+                Object oldString234 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(234);
+                if (oldString234 instanceof Utf8) {
+                    charSequence234 = (decoder).readString(((Utf8) oldString234));
+                } else {
+                    charSequence234 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, charSequence234);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F234': "+ unionIndex234));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex235 = (decoder.readIndex());
+        if (unionIndex235 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, null);
+        } else {
+            if (unionIndex235 == 1) {
+                Utf8 charSequence235;
+                Object oldString235 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(235);
+                if (oldString235 instanceof Utf8) {
+                    charSequence235 = (decoder).readString(((Utf8) oldString235));
+                } else {
+                    charSequence235 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, charSequence235);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F235': "+ unionIndex235));
+            }
+        }
+        int unionIndex236 = (decoder.readIndex());
+        if (unionIndex236 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, null);
+        } else {
+            if (unionIndex236 == 1) {
+                Utf8 charSequence236;
+                Object oldString236 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(236);
+                if (oldString236 instanceof Utf8) {
+                    charSequence236 = (decoder).readString(((Utf8) oldString236));
+                } else {
+                    charSequence236 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, charSequence236);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F236': "+ unionIndex236));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex237 = (decoder.readIndex());
+        if (unionIndex237 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, null);
+        } else {
+            if (unionIndex237 == 1) {
+                Utf8 charSequence237;
+                Object oldString237 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(237);
+                if (oldString237 instanceof Utf8) {
+                    charSequence237 = (decoder).readString(((Utf8) oldString237));
+                } else {
+                    charSequence237 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, charSequence237);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F237': "+ unionIndex237));
+            }
+        }
+        int unionIndex238 = (decoder.readIndex());
+        if (unionIndex238 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, null);
+        } else {
+            if (unionIndex238 == 1) {
+                Utf8 charSequence238;
+                Object oldString238 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(238);
+                if (oldString238 instanceof Utf8) {
+                    charSequence238 = (decoder).readString(((Utf8) oldString238));
+                } else {
+                    charSequence238 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, charSequence238);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F238': "+ unionIndex238));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex239 = (decoder.readIndex());
+        if (unionIndex239 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, null);
+        } else {
+            if (unionIndex239 == 1) {
+                Utf8 charSequence239;
+                Object oldString239 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(239);
+                if (oldString239 instanceof Utf8) {
+                    charSequence239 = (decoder).readString(((Utf8) oldString239));
+                } else {
+                    charSequence239 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, charSequence239);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F239': "+ unionIndex239));
+            }
+        }
+        int unionIndex240 = (decoder.readIndex());
+        if (unionIndex240 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, null);
+        } else {
+            if (unionIndex240 == 1) {
+                Utf8 charSequence240;
+                Object oldString240 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(240);
+                if (oldString240 instanceof Utf8) {
+                    charSequence240 = (decoder).readString(((Utf8) oldString240));
+                } else {
+                    charSequence240 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, charSequence240);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F240': "+ unionIndex240));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex241 = (decoder.readIndex());
+        if (unionIndex241 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, null);
+        } else {
+            if (unionIndex241 == 1) {
+                Utf8 charSequence241;
+                Object oldString241 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(241);
+                if (oldString241 instanceof Utf8) {
+                    charSequence241 = (decoder).readString(((Utf8) oldString241));
+                } else {
+                    charSequence241 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, charSequence241);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F241': "+ unionIndex241));
+            }
+        }
+        int unionIndex242 = (decoder.readIndex());
+        if (unionIndex242 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, null);
+        } else {
+            if (unionIndex242 == 1) {
+                Utf8 charSequence242;
+                Object oldString242 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(242);
+                if (oldString242 instanceof Utf8) {
+                    charSequence242 = (decoder).readString(((Utf8) oldString242));
+                } else {
+                    charSequence242 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, charSequence242);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F242': "+ unionIndex242));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex243 = (decoder.readIndex());
+        if (unionIndex243 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, null);
+        } else {
+            if (unionIndex243 == 1) {
+                Utf8 charSequence243;
+                Object oldString243 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(243);
+                if (oldString243 instanceof Utf8) {
+                    charSequence243 = (decoder).readString(((Utf8) oldString243));
+                } else {
+                    charSequence243 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, charSequence243);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F243': "+ unionIndex243));
+            }
+        }
+        int unionIndex244 = (decoder.readIndex());
+        if (unionIndex244 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, null);
+        } else {
+            if (unionIndex244 == 1) {
+                Utf8 charSequence244;
+                Object oldString244 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(244);
+                if (oldString244 instanceof Utf8) {
+                    charSequence244 = (decoder).readString(((Utf8) oldString244));
+                } else {
+                    charSequence244 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, charSequence244);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F244': "+ unionIndex244));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex245 = (decoder.readIndex());
+        if (unionIndex245 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, null);
+        } else {
+            if (unionIndex245 == 1) {
+                Utf8 charSequence245;
+                Object oldString245 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(245);
+                if (oldString245 instanceof Utf8) {
+                    charSequence245 = (decoder).readString(((Utf8) oldString245));
+                } else {
+                    charSequence245 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, charSequence245);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F245': "+ unionIndex245));
+            }
+        }
+        int unionIndex246 = (decoder.readIndex());
+        if (unionIndex246 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, null);
+        } else {
+            if (unionIndex246 == 1) {
+                Utf8 charSequence246;
+                Object oldString246 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(246);
+                if (oldString246 instanceof Utf8) {
+                    charSequence246 = (decoder).readString(((Utf8) oldString246));
+                } else {
+                    charSequence246 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, charSequence246);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F246': "+ unionIndex246));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex247 = (decoder.readIndex());
+        if (unionIndex247 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, null);
+        } else {
+            if (unionIndex247 == 1) {
+                Utf8 charSequence247;
+                Object oldString247 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(247);
+                if (oldString247 instanceof Utf8) {
+                    charSequence247 = (decoder).readString(((Utf8) oldString247));
+                } else {
+                    charSequence247 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, charSequence247);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F247': "+ unionIndex247));
+            }
+        }
+        int unionIndex248 = (decoder.readIndex());
+        if (unionIndex248 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, null);
+        } else {
+            if (unionIndex248 == 1) {
+                Utf8 charSequence248;
+                Object oldString248 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(248);
+                if (oldString248 instanceof Utf8) {
+                    charSequence248 = (decoder).readString(((Utf8) oldString248));
+                } else {
+                    charSequence248 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, charSequence248);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F248': "+ unionIndex248));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex249 = (decoder.readIndex());
+        if (unionIndex249 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, null);
+        } else {
+            if (unionIndex249 == 1) {
+                Utf8 charSequence249;
+                Object oldString249 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(249);
+                if (oldString249 instanceof Utf8) {
+                    charSequence249 = (decoder).readString(((Utf8) oldString249));
+                } else {
+                    charSequence249 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, charSequence249);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F249': "+ unionIndex249));
+            }
+        }
+        int unionIndex250 = (decoder.readIndex());
+        if (unionIndex250 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, null);
+        } else {
+            if (unionIndex250 == 1) {
+                Utf8 charSequence250;
+                Object oldString250 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(250);
+                if (oldString250 instanceof Utf8) {
+                    charSequence250 = (decoder).readString(((Utf8) oldString250));
+                } else {
+                    charSequence250 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, charSequence250);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F250': "+ unionIndex250));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex251 = (decoder.readIndex());
+        if (unionIndex251 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, null);
+        } else {
+            if (unionIndex251 == 1) {
+                Utf8 charSequence251;
+                Object oldString251 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(251);
+                if (oldString251 instanceof Utf8) {
+                    charSequence251 = (decoder).readString(((Utf8) oldString251));
+                } else {
+                    charSequence251 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, charSequence251);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F251': "+ unionIndex251));
+            }
+        }
+        int unionIndex252 = (decoder.readIndex());
+        if (unionIndex252 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, null);
+        } else {
+            if (unionIndex252 == 1) {
+                Utf8 charSequence252;
+                Object oldString252 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(252);
+                if (oldString252 instanceof Utf8) {
+                    charSequence252 = (decoder).readString(((Utf8) oldString252));
+                } else {
+                    charSequence252 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, charSequence252);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F252': "+ unionIndex252));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex253 = (decoder.readIndex());
+        if (unionIndex253 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, null);
+        } else {
+            if (unionIndex253 == 1) {
+                Utf8 charSequence253;
+                Object oldString253 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(253);
+                if (oldString253 instanceof Utf8) {
+                    charSequence253 = (decoder).readString(((Utf8) oldString253));
+                } else {
+                    charSequence253 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, charSequence253);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F253': "+ unionIndex253));
+            }
+        }
+        int unionIndex254 = (decoder.readIndex());
+        if (unionIndex254 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, null);
+        } else {
+            if (unionIndex254 == 1) {
+                Utf8 charSequence254;
+                Object oldString254 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(254);
+                if (oldString254 instanceof Utf8) {
+                    charSequence254 = (decoder).readString(((Utf8) oldString254));
+                } else {
+                    charSequence254 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, charSequence254);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F254': "+ unionIndex254));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex255 = (decoder.readIndex());
+        if (unionIndex255 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, null);
+        } else {
+            if (unionIndex255 == 1) {
+                Utf8 charSequence255;
+                Object oldString255 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(255);
+                if (oldString255 instanceof Utf8) {
+                    charSequence255 = (decoder).readString(((Utf8) oldString255));
+                } else {
+                    charSequence255 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, charSequence255);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F255': "+ unionIndex255));
+            }
+        }
+        int unionIndex256 = (decoder.readIndex());
+        if (unionIndex256 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, null);
+        } else {
+            if (unionIndex256 == 1) {
+                Utf8 charSequence256;
+                Object oldString256 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(256);
+                if (oldString256 instanceof Utf8) {
+                    charSequence256 = (decoder).readString(((Utf8) oldString256));
+                } else {
+                    charSequence256 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, charSequence256);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F256': "+ unionIndex256));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex257 = (decoder.readIndex());
+        if (unionIndex257 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, null);
+        } else {
+            if (unionIndex257 == 1) {
+                Utf8 charSequence257;
+                Object oldString257 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(257);
+                if (oldString257 instanceof Utf8) {
+                    charSequence257 = (decoder).readString(((Utf8) oldString257));
+                } else {
+                    charSequence257 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, charSequence257);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F257': "+ unionIndex257));
+            }
+        }
+        int unionIndex258 = (decoder.readIndex());
+        if (unionIndex258 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, null);
+        } else {
+            if (unionIndex258 == 1) {
+                Utf8 charSequence258;
+                Object oldString258 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(258);
+                if (oldString258 instanceof Utf8) {
+                    charSequence258 = (decoder).readString(((Utf8) oldString258));
+                } else {
+                    charSequence258 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, charSequence258);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F258': "+ unionIndex258));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex259 = (decoder.readIndex());
+        if (unionIndex259 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, null);
+        } else {
+            if (unionIndex259 == 1) {
+                Utf8 charSequence259;
+                Object oldString259 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(259);
+                if (oldString259 instanceof Utf8) {
+                    charSequence259 = (decoder).readString(((Utf8) oldString259));
+                } else {
+                    charSequence259 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, charSequence259);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F259': "+ unionIndex259));
+            }
+        }
+        int unionIndex260 = (decoder.readIndex());
+        if (unionIndex260 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, null);
+        } else {
+            if (unionIndex260 == 1) {
+                Utf8 charSequence260;
+                Object oldString260 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(260);
+                if (oldString260 instanceof Utf8) {
+                    charSequence260 = (decoder).readString(((Utf8) oldString260));
+                } else {
+                    charSequence260 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, charSequence260);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F260': "+ unionIndex260));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex261 = (decoder.readIndex());
+        if (unionIndex261 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, null);
+        } else {
+            if (unionIndex261 == 1) {
+                Utf8 charSequence261;
+                Object oldString261 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(261);
+                if (oldString261 instanceof Utf8) {
+                    charSequence261 = (decoder).readString(((Utf8) oldString261));
+                } else {
+                    charSequence261 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, charSequence261);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F261': "+ unionIndex261));
+            }
+        }
+        int unionIndex262 = (decoder.readIndex());
+        if (unionIndex262 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, null);
+        } else {
+            if (unionIndex262 == 1) {
+                Utf8 charSequence262;
+                Object oldString262 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(262);
+                if (oldString262 instanceof Utf8) {
+                    charSequence262 = (decoder).readString(((Utf8) oldString262));
+                } else {
+                    charSequence262 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, charSequence262);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F262': "+ unionIndex262));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex263 = (decoder.readIndex());
+        if (unionIndex263 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, null);
+        } else {
+            if (unionIndex263 == 1) {
+                Utf8 charSequence263;
+                Object oldString263 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(263);
+                if (oldString263 instanceof Utf8) {
+                    charSequence263 = (decoder).readString(((Utf8) oldString263));
+                } else {
+                    charSequence263 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, charSequence263);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F263': "+ unionIndex263));
+            }
+        }
+        int unionIndex264 = (decoder.readIndex());
+        if (unionIndex264 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, null);
+        } else {
+            if (unionIndex264 == 1) {
+                Utf8 charSequence264;
+                Object oldString264 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(264);
+                if (oldString264 instanceof Utf8) {
+                    charSequence264 = (decoder).readString(((Utf8) oldString264));
+                } else {
+                    charSequence264 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, charSequence264);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F264': "+ unionIndex264));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex265 = (decoder.readIndex());
+        if (unionIndex265 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, null);
+        } else {
+            if (unionIndex265 == 1) {
+                Utf8 charSequence265;
+                Object oldString265 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(265);
+                if (oldString265 instanceof Utf8) {
+                    charSequence265 = (decoder).readString(((Utf8) oldString265));
+                } else {
+                    charSequence265 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, charSequence265);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F265': "+ unionIndex265));
+            }
+        }
+        int unionIndex266 = (decoder.readIndex());
+        if (unionIndex266 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, null);
+        } else {
+            if (unionIndex266 == 1) {
+                Utf8 charSequence266;
+                Object oldString266 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(266);
+                if (oldString266 instanceof Utf8) {
+                    charSequence266 = (decoder).readString(((Utf8) oldString266));
+                } else {
+                    charSequence266 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, charSequence266);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F266': "+ unionIndex266));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex267 = (decoder.readIndex());
+        if (unionIndex267 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, null);
+        } else {
+            if (unionIndex267 == 1) {
+                Utf8 charSequence267;
+                Object oldString267 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(267);
+                if (oldString267 instanceof Utf8) {
+                    charSequence267 = (decoder).readString(((Utf8) oldString267));
+                } else {
+                    charSequence267 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, charSequence267);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F267': "+ unionIndex267));
+            }
+        }
+        int unionIndex268 = (decoder.readIndex());
+        if (unionIndex268 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, null);
+        } else {
+            if (unionIndex268 == 1) {
+                Utf8 charSequence268;
+                Object oldString268 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(268);
+                if (oldString268 instanceof Utf8) {
+                    charSequence268 = (decoder).readString(((Utf8) oldString268));
+                } else {
+                    charSequence268 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, charSequence268);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F268': "+ unionIndex268));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex269 = (decoder.readIndex());
+        if (unionIndex269 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, null);
+        } else {
+            if (unionIndex269 == 1) {
+                Utf8 charSequence269;
+                Object oldString269 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(269);
+                if (oldString269 instanceof Utf8) {
+                    charSequence269 = (decoder).readString(((Utf8) oldString269));
+                } else {
+                    charSequence269 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, charSequence269);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F269': "+ unionIndex269));
+            }
+        }
+        int unionIndex270 = (decoder.readIndex());
+        if (unionIndex270 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, null);
+        } else {
+            if (unionIndex270 == 1) {
+                Utf8 charSequence270;
+                Object oldString270 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(270);
+                if (oldString270 instanceof Utf8) {
+                    charSequence270 = (decoder).readString(((Utf8) oldString270));
+                } else {
+                    charSequence270 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, charSequence270);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F270': "+ unionIndex270));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex271 = (decoder.readIndex());
+        if (unionIndex271 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, null);
+        } else {
+            if (unionIndex271 == 1) {
+                Utf8 charSequence271;
+                Object oldString271 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(271);
+                if (oldString271 instanceof Utf8) {
+                    charSequence271 = (decoder).readString(((Utf8) oldString271));
+                } else {
+                    charSequence271 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, charSequence271);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F271': "+ unionIndex271));
+            }
+        }
+        int unionIndex272 = (decoder.readIndex());
+        if (unionIndex272 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, null);
+        } else {
+            if (unionIndex272 == 1) {
+                Utf8 charSequence272;
+                Object oldString272 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(272);
+                if (oldString272 instanceof Utf8) {
+                    charSequence272 = (decoder).readString(((Utf8) oldString272));
+                } else {
+                    charSequence272 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, charSequence272);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F272': "+ unionIndex272));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex273 = (decoder.readIndex());
+        if (unionIndex273 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, null);
+        } else {
+            if (unionIndex273 == 1) {
+                Utf8 charSequence273;
+                Object oldString273 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(273);
+                if (oldString273 instanceof Utf8) {
+                    charSequence273 = (decoder).readString(((Utf8) oldString273));
+                } else {
+                    charSequence273 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, charSequence273);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F273': "+ unionIndex273));
+            }
+        }
+        int unionIndex274 = (decoder.readIndex());
+        if (unionIndex274 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, null);
+        } else {
+            if (unionIndex274 == 1) {
+                Utf8 charSequence274;
+                Object oldString274 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(274);
+                if (oldString274 instanceof Utf8) {
+                    charSequence274 = (decoder).readString(((Utf8) oldString274));
+                } else {
+                    charSequence274 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, charSequence274);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F274': "+ unionIndex274));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex275 = (decoder.readIndex());
+        if (unionIndex275 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, null);
+        } else {
+            if (unionIndex275 == 1) {
+                Utf8 charSequence275;
+                Object oldString275 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(275);
+                if (oldString275 instanceof Utf8) {
+                    charSequence275 = (decoder).readString(((Utf8) oldString275));
+                } else {
+                    charSequence275 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, charSequence275);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F275': "+ unionIndex275));
+            }
+        }
+        int unionIndex276 = (decoder.readIndex());
+        if (unionIndex276 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, null);
+        } else {
+            if (unionIndex276 == 1) {
+                Utf8 charSequence276;
+                Object oldString276 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(276);
+                if (oldString276 instanceof Utf8) {
+                    charSequence276 = (decoder).readString(((Utf8) oldString276));
+                } else {
+                    charSequence276 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, charSequence276);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F276': "+ unionIndex276));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex277 = (decoder.readIndex());
+        if (unionIndex277 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, null);
+        } else {
+            if (unionIndex277 == 1) {
+                Utf8 charSequence277;
+                Object oldString277 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(277);
+                if (oldString277 instanceof Utf8) {
+                    charSequence277 = (decoder).readString(((Utf8) oldString277));
+                } else {
+                    charSequence277 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, charSequence277);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F277': "+ unionIndex277));
+            }
+        }
+        int unionIndex278 = (decoder.readIndex());
+        if (unionIndex278 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, null);
+        } else {
+            if (unionIndex278 == 1) {
+                Utf8 charSequence278;
+                Object oldString278 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(278);
+                if (oldString278 instanceof Utf8) {
+                    charSequence278 = (decoder).readString(((Utf8) oldString278));
+                } else {
+                    charSequence278 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, charSequence278);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F278': "+ unionIndex278));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex279 = (decoder.readIndex());
+        if (unionIndex279 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, null);
+        } else {
+            if (unionIndex279 == 1) {
+                Utf8 charSequence279;
+                Object oldString279 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(279);
+                if (oldString279 instanceof Utf8) {
+                    charSequence279 = (decoder).readString(((Utf8) oldString279));
+                } else {
+                    charSequence279 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, charSequence279);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F279': "+ unionIndex279));
+            }
+        }
+        int unionIndex280 = (decoder.readIndex());
+        if (unionIndex280 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, null);
+        } else {
+            if (unionIndex280 == 1) {
+                Utf8 charSequence280;
+                Object oldString280 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(280);
+                if (oldString280 instanceof Utf8) {
+                    charSequence280 = (decoder).readString(((Utf8) oldString280));
+                } else {
+                    charSequence280 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, charSequence280);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F280': "+ unionIndex280));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex281 = (decoder.readIndex());
+        if (unionIndex281 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, null);
+        } else {
+            if (unionIndex281 == 1) {
+                Utf8 charSequence281;
+                Object oldString281 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(281);
+                if (oldString281 instanceof Utf8) {
+                    charSequence281 = (decoder).readString(((Utf8) oldString281));
+                } else {
+                    charSequence281 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, charSequence281);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F281': "+ unionIndex281));
+            }
+        }
+        int unionIndex282 = (decoder.readIndex());
+        if (unionIndex282 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, null);
+        } else {
+            if (unionIndex282 == 1) {
+                Utf8 charSequence282;
+                Object oldString282 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(282);
+                if (oldString282 instanceof Utf8) {
+                    charSequence282 = (decoder).readString(((Utf8) oldString282));
+                } else {
+                    charSequence282 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, charSequence282);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F282': "+ unionIndex282));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex283 = (decoder.readIndex());
+        if (unionIndex283 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, null);
+        } else {
+            if (unionIndex283 == 1) {
+                Utf8 charSequence283;
+                Object oldString283 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(283);
+                if (oldString283 instanceof Utf8) {
+                    charSequence283 = (decoder).readString(((Utf8) oldString283));
+                } else {
+                    charSequence283 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, charSequence283);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F283': "+ unionIndex283));
+            }
+        }
+        int unionIndex284 = (decoder.readIndex());
+        if (unionIndex284 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, null);
+        } else {
+            if (unionIndex284 == 1) {
+                Utf8 charSequence284;
+                Object oldString284 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(284);
+                if (oldString284 instanceof Utf8) {
+                    charSequence284 = (decoder).readString(((Utf8) oldString284));
+                } else {
+                    charSequence284 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, charSequence284);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F284': "+ unionIndex284));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex285 = (decoder.readIndex());
+        if (unionIndex285 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, null);
+        } else {
+            if (unionIndex285 == 1) {
+                Utf8 charSequence285;
+                Object oldString285 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(285);
+                if (oldString285 instanceof Utf8) {
+                    charSequence285 = (decoder).readString(((Utf8) oldString285));
+                } else {
+                    charSequence285 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, charSequence285);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F285': "+ unionIndex285));
+            }
+        }
+        int unionIndex286 = (decoder.readIndex());
+        if (unionIndex286 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, null);
+        } else {
+            if (unionIndex286 == 1) {
+                Utf8 charSequence286;
+                Object oldString286 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(286);
+                if (oldString286 instanceof Utf8) {
+                    charSequence286 = (decoder).readString(((Utf8) oldString286));
+                } else {
+                    charSequence286 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, charSequence286);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F286': "+ unionIndex286));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex287 = (decoder.readIndex());
+        if (unionIndex287 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, null);
+        } else {
+            if (unionIndex287 == 1) {
+                Utf8 charSequence287;
+                Object oldString287 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(287);
+                if (oldString287 instanceof Utf8) {
+                    charSequence287 = (decoder).readString(((Utf8) oldString287));
+                } else {
+                    charSequence287 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, charSequence287);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F287': "+ unionIndex287));
+            }
+        }
+        int unionIndex288 = (decoder.readIndex());
+        if (unionIndex288 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, null);
+        } else {
+            if (unionIndex288 == 1) {
+                Utf8 charSequence288;
+                Object oldString288 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(288);
+                if (oldString288 instanceof Utf8) {
+                    charSequence288 = (decoder).readString(((Utf8) oldString288));
+                } else {
+                    charSequence288 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, charSequence288);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F288': "+ unionIndex288));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex289 = (decoder.readIndex());
+        if (unionIndex289 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, null);
+        } else {
+            if (unionIndex289 == 1) {
+                Utf8 charSequence289;
+                Object oldString289 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(289);
+                if (oldString289 instanceof Utf8) {
+                    charSequence289 = (decoder).readString(((Utf8) oldString289));
+                } else {
+                    charSequence289 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, charSequence289);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F289': "+ unionIndex289));
+            }
+        }
+        int unionIndex290 = (decoder.readIndex());
+        if (unionIndex290 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, null);
+        } else {
+            if (unionIndex290 == 1) {
+                Utf8 charSequence290;
+                Object oldString290 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(290);
+                if (oldString290 instanceof Utf8) {
+                    charSequence290 = (decoder).readString(((Utf8) oldString290));
+                } else {
+                    charSequence290 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, charSequence290);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F290': "+ unionIndex290));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex291 = (decoder.readIndex());
+        if (unionIndex291 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, null);
+        } else {
+            if (unionIndex291 == 1) {
+                Utf8 charSequence291;
+                Object oldString291 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(291);
+                if (oldString291 instanceof Utf8) {
+                    charSequence291 = (decoder).readString(((Utf8) oldString291));
+                } else {
+                    charSequence291 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, charSequence291);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F291': "+ unionIndex291));
+            }
+        }
+        int unionIndex292 = (decoder.readIndex());
+        if (unionIndex292 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, null);
+        } else {
+            if (unionIndex292 == 1) {
+                Utf8 charSequence292;
+                Object oldString292 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(292);
+                if (oldString292 instanceof Utf8) {
+                    charSequence292 = (decoder).readString(((Utf8) oldString292));
+                } else {
+                    charSequence292 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, charSequence292);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F292': "+ unionIndex292));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex293 = (decoder.readIndex());
+        if (unionIndex293 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, null);
+        } else {
+            if (unionIndex293 == 1) {
+                Utf8 charSequence293;
+                Object oldString293 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(293);
+                if (oldString293 instanceof Utf8) {
+                    charSequence293 = (decoder).readString(((Utf8) oldString293));
+                } else {
+                    charSequence293 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, charSequence293);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F293': "+ unionIndex293));
+            }
+        }
+        int unionIndex294 = (decoder.readIndex());
+        if (unionIndex294 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, null);
+        } else {
+            if (unionIndex294 == 1) {
+                Utf8 charSequence294;
+                Object oldString294 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(294);
+                if (oldString294 instanceof Utf8) {
+                    charSequence294 = (decoder).readString(((Utf8) oldString294));
+                } else {
+                    charSequence294 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, charSequence294);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F294': "+ unionIndex294));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex295 = (decoder.readIndex());
+        if (unionIndex295 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, null);
+        } else {
+            if (unionIndex295 == 1) {
+                Utf8 charSequence295;
+                Object oldString295 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(295);
+                if (oldString295 instanceof Utf8) {
+                    charSequence295 = (decoder).readString(((Utf8) oldString295));
+                } else {
+                    charSequence295 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, charSequence295);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F295': "+ unionIndex295));
+            }
+        }
+        int unionIndex296 = (decoder.readIndex());
+        if (unionIndex296 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, null);
+        } else {
+            if (unionIndex296 == 1) {
+                Utf8 charSequence296;
+                Object oldString296 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(296);
+                if (oldString296 instanceof Utf8) {
+                    charSequence296 = (decoder).readString(((Utf8) oldString296));
+                } else {
+                    charSequence296 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, charSequence296);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F296': "+ unionIndex296));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex297 = (decoder.readIndex());
+        if (unionIndex297 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, null);
+        } else {
+            if (unionIndex297 == 1) {
+                Utf8 charSequence297;
+                Object oldString297 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(297);
+                if (oldString297 instanceof Utf8) {
+                    charSequence297 = (decoder).readString(((Utf8) oldString297));
+                } else {
+                    charSequence297 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, charSequence297);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F297': "+ unionIndex297));
+            }
+        }
+        int unionIndex298 = (decoder.readIndex());
+        if (unionIndex298 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, null);
+        } else {
+            if (unionIndex298 == 1) {
+                Utf8 charSequence298;
+                Object oldString298 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(298);
+                if (oldString298 instanceof Utf8) {
+                    charSequence298 = (decoder).readString(((Utf8) oldString298));
+                } else {
+                    charSequence298 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, charSequence298);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F298': "+ unionIndex298));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex299 = (decoder.readIndex());
+        if (unionIndex299 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, null);
+        } else {
+            if (unionIndex299 == 1) {
+                Utf8 charSequence299;
+                Object oldString299 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(299);
+                if (oldString299 instanceof Utf8) {
+                    charSequence299 = (decoder).readString(((Utf8) oldString299));
+                } else {
+                    charSequence299 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, charSequence299);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F299': "+ unionIndex299));
+            }
+        }
+        int unionIndex300 = (decoder.readIndex());
+        if (unionIndex300 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, null);
+        } else {
+            if (unionIndex300 == 1) {
+                Utf8 charSequence300;
+                Object oldString300 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(300);
+                if (oldString300 instanceof Utf8) {
+                    charSequence300 = (decoder).readString(((Utf8) oldString300));
+                } else {
+                    charSequence300 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, charSequence300);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F300': "+ unionIndex300));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex301 = (decoder.readIndex());
+        if (unionIndex301 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, null);
+        } else {
+            if (unionIndex301 == 1) {
+                Utf8 charSequence301;
+                Object oldString301 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(301);
+                if (oldString301 instanceof Utf8) {
+                    charSequence301 = (decoder).readString(((Utf8) oldString301));
+                } else {
+                    charSequence301 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, charSequence301);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F301': "+ unionIndex301));
+            }
+        }
+        int unionIndex302 = (decoder.readIndex());
+        if (unionIndex302 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, null);
+        } else {
+            if (unionIndex302 == 1) {
+                Utf8 charSequence302;
+                Object oldString302 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(302);
+                if (oldString302 instanceof Utf8) {
+                    charSequence302 = (decoder).readString(((Utf8) oldString302));
+                } else {
+                    charSequence302 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, charSequence302);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F302': "+ unionIndex302));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex303 = (decoder.readIndex());
+        if (unionIndex303 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, null);
+        } else {
+            if (unionIndex303 == 1) {
+                Utf8 charSequence303;
+                Object oldString303 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(303);
+                if (oldString303 instanceof Utf8) {
+                    charSequence303 = (decoder).readString(((Utf8) oldString303));
+                } else {
+                    charSequence303 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, charSequence303);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F303': "+ unionIndex303));
+            }
+        }
+        int unionIndex304 = (decoder.readIndex());
+        if (unionIndex304 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, null);
+        } else {
+            if (unionIndex304 == 1) {
+                Utf8 charSequence304;
+                Object oldString304 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(304);
+                if (oldString304 instanceof Utf8) {
+                    charSequence304 = (decoder).readString(((Utf8) oldString304));
+                } else {
+                    charSequence304 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, charSequence304);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F304': "+ unionIndex304));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex305 = (decoder.readIndex());
+        if (unionIndex305 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, null);
+        } else {
+            if (unionIndex305 == 1) {
+                Utf8 charSequence305;
+                Object oldString305 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(305);
+                if (oldString305 instanceof Utf8) {
+                    charSequence305 = (decoder).readString(((Utf8) oldString305));
+                } else {
+                    charSequence305 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, charSequence305);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F305': "+ unionIndex305));
+            }
+        }
+        int unionIndex306 = (decoder.readIndex());
+        if (unionIndex306 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, null);
+        } else {
+            if (unionIndex306 == 1) {
+                Utf8 charSequence306;
+                Object oldString306 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(306);
+                if (oldString306 instanceof Utf8) {
+                    charSequence306 = (decoder).readString(((Utf8) oldString306));
+                } else {
+                    charSequence306 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, charSequence306);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F306': "+ unionIndex306));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex307 = (decoder.readIndex());
+        if (unionIndex307 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, null);
+        } else {
+            if (unionIndex307 == 1) {
+                Utf8 charSequence307;
+                Object oldString307 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(307);
+                if (oldString307 instanceof Utf8) {
+                    charSequence307 = (decoder).readString(((Utf8) oldString307));
+                } else {
+                    charSequence307 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, charSequence307);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F307': "+ unionIndex307));
+            }
+        }
+        int unionIndex308 = (decoder.readIndex());
+        if (unionIndex308 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, null);
+        } else {
+            if (unionIndex308 == 1) {
+                Utf8 charSequence308;
+                Object oldString308 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(308);
+                if (oldString308 instanceof Utf8) {
+                    charSequence308 = (decoder).readString(((Utf8) oldString308));
+                } else {
+                    charSequence308 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, charSequence308);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F308': "+ unionIndex308));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex309 = (decoder.readIndex());
+        if (unionIndex309 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, null);
+        } else {
+            if (unionIndex309 == 1) {
+                Utf8 charSequence309;
+                Object oldString309 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(309);
+                if (oldString309 instanceof Utf8) {
+                    charSequence309 = (decoder).readString(((Utf8) oldString309));
+                } else {
+                    charSequence309 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, charSequence309);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F309': "+ unionIndex309));
+            }
+        }
+        int unionIndex310 = (decoder.readIndex());
+        if (unionIndex310 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, null);
+        } else {
+            if (unionIndex310 == 1) {
+                Utf8 charSequence310;
+                Object oldString310 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(310);
+                if (oldString310 instanceof Utf8) {
+                    charSequence310 = (decoder).readString(((Utf8) oldString310));
+                } else {
+                    charSequence310 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, charSequence310);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F310': "+ unionIndex310));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex311 = (decoder.readIndex());
+        if (unionIndex311 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, null);
+        } else {
+            if (unionIndex311 == 1) {
+                Utf8 charSequence311;
+                Object oldString311 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(311);
+                if (oldString311 instanceof Utf8) {
+                    charSequence311 = (decoder).readString(((Utf8) oldString311));
+                } else {
+                    charSequence311 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, charSequence311);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F311': "+ unionIndex311));
+            }
+        }
+        int unionIndex312 = (decoder.readIndex());
+        if (unionIndex312 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, null);
+        } else {
+            if (unionIndex312 == 1) {
+                Utf8 charSequence312;
+                Object oldString312 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(312);
+                if (oldString312 instanceof Utf8) {
+                    charSequence312 = (decoder).readString(((Utf8) oldString312));
+                } else {
+                    charSequence312 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, charSequence312);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F312': "+ unionIndex312));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex313 = (decoder.readIndex());
+        if (unionIndex313 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, null);
+        } else {
+            if (unionIndex313 == 1) {
+                Utf8 charSequence313;
+                Object oldString313 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(313);
+                if (oldString313 instanceof Utf8) {
+                    charSequence313 = (decoder).readString(((Utf8) oldString313));
+                } else {
+                    charSequence313 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, charSequence313);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F313': "+ unionIndex313));
+            }
+        }
+        int unionIndex314 = (decoder.readIndex());
+        if (unionIndex314 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, null);
+        } else {
+            if (unionIndex314 == 1) {
+                Utf8 charSequence314;
+                Object oldString314 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(314);
+                if (oldString314 instanceof Utf8) {
+                    charSequence314 = (decoder).readString(((Utf8) oldString314));
+                } else {
+                    charSequence314 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, charSequence314);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F314': "+ unionIndex314));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex315 = (decoder.readIndex());
+        if (unionIndex315 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, null);
+        } else {
+            if (unionIndex315 == 1) {
+                Utf8 charSequence315;
+                Object oldString315 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(315);
+                if (oldString315 instanceof Utf8) {
+                    charSequence315 = (decoder).readString(((Utf8) oldString315));
+                } else {
+                    charSequence315 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, charSequence315);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F315': "+ unionIndex315));
+            }
+        }
+        int unionIndex316 = (decoder.readIndex());
+        if (unionIndex316 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, null);
+        } else {
+            if (unionIndex316 == 1) {
+                Utf8 charSequence316;
+                Object oldString316 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(316);
+                if (oldString316 instanceof Utf8) {
+                    charSequence316 = (decoder).readString(((Utf8) oldString316));
+                } else {
+                    charSequence316 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, charSequence316);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F316': "+ unionIndex316));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex317 = (decoder.readIndex());
+        if (unionIndex317 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, null);
+        } else {
+            if (unionIndex317 == 1) {
+                Utf8 charSequence317;
+                Object oldString317 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(317);
+                if (oldString317 instanceof Utf8) {
+                    charSequence317 = (decoder).readString(((Utf8) oldString317));
+                } else {
+                    charSequence317 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, charSequence317);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F317': "+ unionIndex317));
+            }
+        }
+        int unionIndex318 = (decoder.readIndex());
+        if (unionIndex318 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, null);
+        } else {
+            if (unionIndex318 == 1) {
+                Utf8 charSequence318;
+                Object oldString318 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(318);
+                if (oldString318 instanceof Utf8) {
+                    charSequence318 = (decoder).readString(((Utf8) oldString318));
+                } else {
+                    charSequence318 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, charSequence318);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F318': "+ unionIndex318));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex319 = (decoder.readIndex());
+        if (unionIndex319 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, null);
+        } else {
+            if (unionIndex319 == 1) {
+                Utf8 charSequence319;
+                Object oldString319 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(319);
+                if (oldString319 instanceof Utf8) {
+                    charSequence319 = (decoder).readString(((Utf8) oldString319));
+                } else {
+                    charSequence319 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, charSequence319);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F319': "+ unionIndex319));
+            }
+        }
+        int unionIndex320 = (decoder.readIndex());
+        if (unionIndex320 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, null);
+        } else {
+            if (unionIndex320 == 1) {
+                Utf8 charSequence320;
+                Object oldString320 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(320);
+                if (oldString320 instanceof Utf8) {
+                    charSequence320 = (decoder).readString(((Utf8) oldString320));
+                } else {
+                    charSequence320 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, charSequence320);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F320': "+ unionIndex320));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex321 = (decoder.readIndex());
+        if (unionIndex321 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, null);
+        } else {
+            if (unionIndex321 == 1) {
+                Utf8 charSequence321;
+                Object oldString321 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(321);
+                if (oldString321 instanceof Utf8) {
+                    charSequence321 = (decoder).readString(((Utf8) oldString321));
+                } else {
+                    charSequence321 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, charSequence321);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F321': "+ unionIndex321));
+            }
+        }
+        int unionIndex322 = (decoder.readIndex());
+        if (unionIndex322 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, null);
+        } else {
+            if (unionIndex322 == 1) {
+                Utf8 charSequence322;
+                Object oldString322 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(322);
+                if (oldString322 instanceof Utf8) {
+                    charSequence322 = (decoder).readString(((Utf8) oldString322));
+                } else {
+                    charSequence322 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, charSequence322);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F322': "+ unionIndex322));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex323 = (decoder.readIndex());
+        if (unionIndex323 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, null);
+        } else {
+            if (unionIndex323 == 1) {
+                Utf8 charSequence323;
+                Object oldString323 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(323);
+                if (oldString323 instanceof Utf8) {
+                    charSequence323 = (decoder).readString(((Utf8) oldString323));
+                } else {
+                    charSequence323 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, charSequence323);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F323': "+ unionIndex323));
+            }
+        }
+        int unionIndex324 = (decoder.readIndex());
+        if (unionIndex324 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, null);
+        } else {
+            if (unionIndex324 == 1) {
+                Utf8 charSequence324;
+                Object oldString324 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(324);
+                if (oldString324 instanceof Utf8) {
+                    charSequence324 = (decoder).readString(((Utf8) oldString324));
+                } else {
+                    charSequence324 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, charSequence324);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F324': "+ unionIndex324));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex325 = (decoder.readIndex());
+        if (unionIndex325 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, null);
+        } else {
+            if (unionIndex325 == 1) {
+                Utf8 charSequence325;
+                Object oldString325 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(325);
+                if (oldString325 instanceof Utf8) {
+                    charSequence325 = (decoder).readString(((Utf8) oldString325));
+                } else {
+                    charSequence325 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, charSequence325);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F325': "+ unionIndex325));
+            }
+        }
+        int unionIndex326 = (decoder.readIndex());
+        if (unionIndex326 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, null);
+        } else {
+            if (unionIndex326 == 1) {
+                Utf8 charSequence326;
+                Object oldString326 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(326);
+                if (oldString326 instanceof Utf8) {
+                    charSequence326 = (decoder).readString(((Utf8) oldString326));
+                } else {
+                    charSequence326 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, charSequence326);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F326': "+ unionIndex326));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex327 = (decoder.readIndex());
+        if (unionIndex327 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, null);
+        } else {
+            if (unionIndex327 == 1) {
+                Utf8 charSequence327;
+                Object oldString327 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(327);
+                if (oldString327 instanceof Utf8) {
+                    charSequence327 = (decoder).readString(((Utf8) oldString327));
+                } else {
+                    charSequence327 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, charSequence327);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F327': "+ unionIndex327));
+            }
+        }
+        int unionIndex328 = (decoder.readIndex());
+        if (unionIndex328 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, null);
+        } else {
+            if (unionIndex328 == 1) {
+                Utf8 charSequence328;
+                Object oldString328 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(328);
+                if (oldString328 instanceof Utf8) {
+                    charSequence328 = (decoder).readString(((Utf8) oldString328));
+                } else {
+                    charSequence328 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, charSequence328);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F328': "+ unionIndex328));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex329 = (decoder.readIndex());
+        if (unionIndex329 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, null);
+        } else {
+            if (unionIndex329 == 1) {
+                Utf8 charSequence329;
+                Object oldString329 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(329);
+                if (oldString329 instanceof Utf8) {
+                    charSequence329 = (decoder).readString(((Utf8) oldString329));
+                } else {
+                    charSequence329 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, charSequence329);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F329': "+ unionIndex329));
+            }
+        }
+        int unionIndex330 = (decoder.readIndex());
+        if (unionIndex330 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, null);
+        } else {
+            if (unionIndex330 == 1) {
+                Utf8 charSequence330;
+                Object oldString330 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(330);
+                if (oldString330 instanceof Utf8) {
+                    charSequence330 = (decoder).readString(((Utf8) oldString330));
+                } else {
+                    charSequence330 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, charSequence330);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F330': "+ unionIndex330));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex331 = (decoder.readIndex());
+        if (unionIndex331 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, null);
+        } else {
+            if (unionIndex331 == 1) {
+                Utf8 charSequence331;
+                Object oldString331 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(331);
+                if (oldString331 instanceof Utf8) {
+                    charSequence331 = (decoder).readString(((Utf8) oldString331));
+                } else {
+                    charSequence331 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, charSequence331);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F331': "+ unionIndex331));
+            }
+        }
+        int unionIndex332 = (decoder.readIndex());
+        if (unionIndex332 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, null);
+        } else {
+            if (unionIndex332 == 1) {
+                Utf8 charSequence332;
+                Object oldString332 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(332);
+                if (oldString332 instanceof Utf8) {
+                    charSequence332 = (decoder).readString(((Utf8) oldString332));
+                } else {
+                    charSequence332 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, charSequence332);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F332': "+ unionIndex332));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex333 = (decoder.readIndex());
+        if (unionIndex333 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, null);
+        } else {
+            if (unionIndex333 == 1) {
+                Utf8 charSequence333;
+                Object oldString333 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(333);
+                if (oldString333 instanceof Utf8) {
+                    charSequence333 = (decoder).readString(((Utf8) oldString333));
+                } else {
+                    charSequence333 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, charSequence333);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F333': "+ unionIndex333));
+            }
+        }
+        int unionIndex334 = (decoder.readIndex());
+        if (unionIndex334 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, null);
+        } else {
+            if (unionIndex334 == 1) {
+                Utf8 charSequence334;
+                Object oldString334 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(334);
+                if (oldString334 instanceof Utf8) {
+                    charSequence334 = (decoder).readString(((Utf8) oldString334));
+                } else {
+                    charSequence334 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, charSequence334);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F334': "+ unionIndex334));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex335 = (decoder.readIndex());
+        if (unionIndex335 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, null);
+        } else {
+            if (unionIndex335 == 1) {
+                Utf8 charSequence335;
+                Object oldString335 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(335);
+                if (oldString335 instanceof Utf8) {
+                    charSequence335 = (decoder).readString(((Utf8) oldString335));
+                } else {
+                    charSequence335 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, charSequence335);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F335': "+ unionIndex335));
+            }
+        }
+        int unionIndex336 = (decoder.readIndex());
+        if (unionIndex336 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, null);
+        } else {
+            if (unionIndex336 == 1) {
+                Utf8 charSequence336;
+                Object oldString336 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(336);
+                if (oldString336 instanceof Utf8) {
+                    charSequence336 = (decoder).readString(((Utf8) oldString336));
+                } else {
+                    charSequence336 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, charSequence336);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F336': "+ unionIndex336));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex337 = (decoder.readIndex());
+        if (unionIndex337 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, null);
+        } else {
+            if (unionIndex337 == 1) {
+                Utf8 charSequence337;
+                Object oldString337 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(337);
+                if (oldString337 instanceof Utf8) {
+                    charSequence337 = (decoder).readString(((Utf8) oldString337));
+                } else {
+                    charSequence337 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, charSequence337);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F337': "+ unionIndex337));
+            }
+        }
+        int unionIndex338 = (decoder.readIndex());
+        if (unionIndex338 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, null);
+        } else {
+            if (unionIndex338 == 1) {
+                Utf8 charSequence338;
+                Object oldString338 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(338);
+                if (oldString338 instanceof Utf8) {
+                    charSequence338 = (decoder).readString(((Utf8) oldString338));
+                } else {
+                    charSequence338 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, charSequence338);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F338': "+ unionIndex338));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex339 = (decoder.readIndex());
+        if (unionIndex339 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, null);
+        } else {
+            if (unionIndex339 == 1) {
+                Utf8 charSequence339;
+                Object oldString339 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(339);
+                if (oldString339 instanceof Utf8) {
+                    charSequence339 = (decoder).readString(((Utf8) oldString339));
+                } else {
+                    charSequence339 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, charSequence339);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F339': "+ unionIndex339));
+            }
+        }
+        int unionIndex340 = (decoder.readIndex());
+        if (unionIndex340 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, null);
+        } else {
+            if (unionIndex340 == 1) {
+                Utf8 charSequence340;
+                Object oldString340 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(340);
+                if (oldString340 instanceof Utf8) {
+                    charSequence340 = (decoder).readString(((Utf8) oldString340));
+                } else {
+                    charSequence340 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, charSequence340);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F340': "+ unionIndex340));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex341 = (decoder.readIndex());
+        if (unionIndex341 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, null);
+        } else {
+            if (unionIndex341 == 1) {
+                Utf8 charSequence341;
+                Object oldString341 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(341);
+                if (oldString341 instanceof Utf8) {
+                    charSequence341 = (decoder).readString(((Utf8) oldString341));
+                } else {
+                    charSequence341 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, charSequence341);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F341': "+ unionIndex341));
+            }
+        }
+        int unionIndex342 = (decoder.readIndex());
+        if (unionIndex342 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, null);
+        } else {
+            if (unionIndex342 == 1) {
+                Utf8 charSequence342;
+                Object oldString342 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(342);
+                if (oldString342 instanceof Utf8) {
+                    charSequence342 = (decoder).readString(((Utf8) oldString342));
+                } else {
+                    charSequence342 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, charSequence342);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F342': "+ unionIndex342));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex343 = (decoder.readIndex());
+        if (unionIndex343 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, null);
+        } else {
+            if (unionIndex343 == 1) {
+                Utf8 charSequence343;
+                Object oldString343 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(343);
+                if (oldString343 instanceof Utf8) {
+                    charSequence343 = (decoder).readString(((Utf8) oldString343));
+                } else {
+                    charSequence343 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, charSequence343);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F343': "+ unionIndex343));
+            }
+        }
+        int unionIndex344 = (decoder.readIndex());
+        if (unionIndex344 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, null);
+        } else {
+            if (unionIndex344 == 1) {
+                Utf8 charSequence344;
+                Object oldString344 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(344);
+                if (oldString344 instanceof Utf8) {
+                    charSequence344 = (decoder).readString(((Utf8) oldString344));
+                } else {
+                    charSequence344 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, charSequence344);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F344': "+ unionIndex344));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex345 = (decoder.readIndex());
+        if (unionIndex345 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, null);
+        } else {
+            if (unionIndex345 == 1) {
+                Utf8 charSequence345;
+                Object oldString345 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(345);
+                if (oldString345 instanceof Utf8) {
+                    charSequence345 = (decoder).readString(((Utf8) oldString345));
+                } else {
+                    charSequence345 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, charSequence345);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F345': "+ unionIndex345));
+            }
+        }
+        int unionIndex346 = (decoder.readIndex());
+        if (unionIndex346 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, null);
+        } else {
+            if (unionIndex346 == 1) {
+                Utf8 charSequence346;
+                Object oldString346 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(346);
+                if (oldString346 instanceof Utf8) {
+                    charSequence346 = (decoder).readString(((Utf8) oldString346));
+                } else {
+                    charSequence346 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, charSequence346);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F346': "+ unionIndex346));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex347 = (decoder.readIndex());
+        if (unionIndex347 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, null);
+        } else {
+            if (unionIndex347 == 1) {
+                Utf8 charSequence347;
+                Object oldString347 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(347);
+                if (oldString347 instanceof Utf8) {
+                    charSequence347 = (decoder).readString(((Utf8) oldString347));
+                } else {
+                    charSequence347 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, charSequence347);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F347': "+ unionIndex347));
+            }
+        }
+        int unionIndex348 = (decoder.readIndex());
+        if (unionIndex348 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, null);
+        } else {
+            if (unionIndex348 == 1) {
+                Utf8 charSequence348;
+                Object oldString348 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(348);
+                if (oldString348 instanceof Utf8) {
+                    charSequence348 = (decoder).readString(((Utf8) oldString348));
+                } else {
+                    charSequence348 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, charSequence348);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F348': "+ unionIndex348));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex349 = (decoder.readIndex());
+        if (unionIndex349 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, null);
+        } else {
+            if (unionIndex349 == 1) {
+                Utf8 charSequence349;
+                Object oldString349 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(349);
+                if (oldString349 instanceof Utf8) {
+                    charSequence349 = (decoder).readString(((Utf8) oldString349));
+                } else {
+                    charSequence349 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, charSequence349);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F349': "+ unionIndex349));
+            }
+        }
+        int unionIndex350 = (decoder.readIndex());
+        if (unionIndex350 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, null);
+        } else {
+            if (unionIndex350 == 1) {
+                Utf8 charSequence350;
+                Object oldString350 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(350);
+                if (oldString350 instanceof Utf8) {
+                    charSequence350 = (decoder).readString(((Utf8) oldString350));
+                } else {
+                    charSequence350 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, charSequence350);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F350': "+ unionIndex350));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex351 = (decoder.readIndex());
+        if (unionIndex351 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, null);
+        } else {
+            if (unionIndex351 == 1) {
+                Utf8 charSequence351;
+                Object oldString351 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(351);
+                if (oldString351 instanceof Utf8) {
+                    charSequence351 = (decoder).readString(((Utf8) oldString351));
+                } else {
+                    charSequence351 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, charSequence351);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F351': "+ unionIndex351));
+            }
+        }
+        int unionIndex352 = (decoder.readIndex());
+        if (unionIndex352 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, null);
+        } else {
+            if (unionIndex352 == 1) {
+                Utf8 charSequence352;
+                Object oldString352 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(352);
+                if (oldString352 instanceof Utf8) {
+                    charSequence352 = (decoder).readString(((Utf8) oldString352));
+                } else {
+                    charSequence352 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, charSequence352);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F352': "+ unionIndex352));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex353 = (decoder.readIndex());
+        if (unionIndex353 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, null);
+        } else {
+            if (unionIndex353 == 1) {
+                Utf8 charSequence353;
+                Object oldString353 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(353);
+                if (oldString353 instanceof Utf8) {
+                    charSequence353 = (decoder).readString(((Utf8) oldString353));
+                } else {
+                    charSequence353 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, charSequence353);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F353': "+ unionIndex353));
+            }
+        }
+        int unionIndex354 = (decoder.readIndex());
+        if (unionIndex354 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, null);
+        } else {
+            if (unionIndex354 == 1) {
+                Utf8 charSequence354;
+                Object oldString354 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(354);
+                if (oldString354 instanceof Utf8) {
+                    charSequence354 = (decoder).readString(((Utf8) oldString354));
+                } else {
+                    charSequence354 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, charSequence354);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F354': "+ unionIndex354));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex355 = (decoder.readIndex());
+        if (unionIndex355 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, null);
+        } else {
+            if (unionIndex355 == 1) {
+                Utf8 charSequence355;
+                Object oldString355 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(355);
+                if (oldString355 instanceof Utf8) {
+                    charSequence355 = (decoder).readString(((Utf8) oldString355));
+                } else {
+                    charSequence355 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, charSequence355);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F355': "+ unionIndex355));
+            }
+        }
+        int unionIndex356 = (decoder.readIndex());
+        if (unionIndex356 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, null);
+        } else {
+            if (unionIndex356 == 1) {
+                Utf8 charSequence356;
+                Object oldString356 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(356);
+                if (oldString356 instanceof Utf8) {
+                    charSequence356 = (decoder).readString(((Utf8) oldString356));
+                } else {
+                    charSequence356 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, charSequence356);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F356': "+ unionIndex356));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex357 = (decoder.readIndex());
+        if (unionIndex357 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, null);
+        } else {
+            if (unionIndex357 == 1) {
+                Utf8 charSequence357;
+                Object oldString357 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(357);
+                if (oldString357 instanceof Utf8) {
+                    charSequence357 = (decoder).readString(((Utf8) oldString357));
+                } else {
+                    charSequence357 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, charSequence357);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F357': "+ unionIndex357));
+            }
+        }
+        int unionIndex358 = (decoder.readIndex());
+        if (unionIndex358 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, null);
+        } else {
+            if (unionIndex358 == 1) {
+                Utf8 charSequence358;
+                Object oldString358 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(358);
+                if (oldString358 instanceof Utf8) {
+                    charSequence358 = (decoder).readString(((Utf8) oldString358));
+                } else {
+                    charSequence358 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, charSequence358);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F358': "+ unionIndex358));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex359 = (decoder.readIndex());
+        if (unionIndex359 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, null);
+        } else {
+            if (unionIndex359 == 1) {
+                Utf8 charSequence359;
+                Object oldString359 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(359);
+                if (oldString359 instanceof Utf8) {
+                    charSequence359 = (decoder).readString(((Utf8) oldString359));
+                } else {
+                    charSequence359 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, charSequence359);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F359': "+ unionIndex359));
+            }
+        }
+        int unionIndex360 = (decoder.readIndex());
+        if (unionIndex360 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, null);
+        } else {
+            if (unionIndex360 == 1) {
+                Utf8 charSequence360;
+                Object oldString360 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(360);
+                if (oldString360 instanceof Utf8) {
+                    charSequence360 = (decoder).readString(((Utf8) oldString360));
+                } else {
+                    charSequence360 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, charSequence360);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F360': "+ unionIndex360));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex361 = (decoder.readIndex());
+        if (unionIndex361 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, null);
+        } else {
+            if (unionIndex361 == 1) {
+                Utf8 charSequence361;
+                Object oldString361 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(361);
+                if (oldString361 instanceof Utf8) {
+                    charSequence361 = (decoder).readString(((Utf8) oldString361));
+                } else {
+                    charSequence361 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, charSequence361);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F361': "+ unionIndex361));
+            }
+        }
+        int unionIndex362 = (decoder.readIndex());
+        if (unionIndex362 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, null);
+        } else {
+            if (unionIndex362 == 1) {
+                Utf8 charSequence362;
+                Object oldString362 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(362);
+                if (oldString362 instanceof Utf8) {
+                    charSequence362 = (decoder).readString(((Utf8) oldString362));
+                } else {
+                    charSequence362 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, charSequence362);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F362': "+ unionIndex362));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex363 = (decoder.readIndex());
+        if (unionIndex363 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, null);
+        } else {
+            if (unionIndex363 == 1) {
+                Utf8 charSequence363;
+                Object oldString363 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(363);
+                if (oldString363 instanceof Utf8) {
+                    charSequence363 = (decoder).readString(((Utf8) oldString363));
+                } else {
+                    charSequence363 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, charSequence363);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F363': "+ unionIndex363));
+            }
+        }
+        int unionIndex364 = (decoder.readIndex());
+        if (unionIndex364 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, null);
+        } else {
+            if (unionIndex364 == 1) {
+                Utf8 charSequence364;
+                Object oldString364 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(364);
+                if (oldString364 instanceof Utf8) {
+                    charSequence364 = (decoder).readString(((Utf8) oldString364));
+                } else {
+                    charSequence364 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, charSequence364);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F364': "+ unionIndex364));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex365 = (decoder.readIndex());
+        if (unionIndex365 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, null);
+        } else {
+            if (unionIndex365 == 1) {
+                Utf8 charSequence365;
+                Object oldString365 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(365);
+                if (oldString365 instanceof Utf8) {
+                    charSequence365 = (decoder).readString(((Utf8) oldString365));
+                } else {
+                    charSequence365 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, charSequence365);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F365': "+ unionIndex365));
+            }
+        }
+        int unionIndex366 = (decoder.readIndex());
+        if (unionIndex366 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, null);
+        } else {
+            if (unionIndex366 == 1) {
+                Utf8 charSequence366;
+                Object oldString366 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(366);
+                if (oldString366 instanceof Utf8) {
+                    charSequence366 = (decoder).readString(((Utf8) oldString366));
+                } else {
+                    charSequence366 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, charSequence366);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F366': "+ unionIndex366));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex367 = (decoder.readIndex());
+        if (unionIndex367 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, null);
+        } else {
+            if (unionIndex367 == 1) {
+                Utf8 charSequence367;
+                Object oldString367 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(367);
+                if (oldString367 instanceof Utf8) {
+                    charSequence367 = (decoder).readString(((Utf8) oldString367));
+                } else {
+                    charSequence367 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, charSequence367);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F367': "+ unionIndex367));
+            }
+        }
+        int unionIndex368 = (decoder.readIndex());
+        if (unionIndex368 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, null);
+        } else {
+            if (unionIndex368 == 1) {
+                Utf8 charSequence368;
+                Object oldString368 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(368);
+                if (oldString368 instanceof Utf8) {
+                    charSequence368 = (decoder).readString(((Utf8) oldString368));
+                } else {
+                    charSequence368 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, charSequence368);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F368': "+ unionIndex368));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex369 = (decoder.readIndex());
+        if (unionIndex369 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, null);
+        } else {
+            if (unionIndex369 == 1) {
+                Utf8 charSequence369;
+                Object oldString369 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(369);
+                if (oldString369 instanceof Utf8) {
+                    charSequence369 = (decoder).readString(((Utf8) oldString369));
+                } else {
+                    charSequence369 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, charSequence369);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F369': "+ unionIndex369));
+            }
+        }
+        int unionIndex370 = (decoder.readIndex());
+        if (unionIndex370 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, null);
+        } else {
+            if (unionIndex370 == 1) {
+                Utf8 charSequence370;
+                Object oldString370 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(370);
+                if (oldString370 instanceof Utf8) {
+                    charSequence370 = (decoder).readString(((Utf8) oldString370));
+                } else {
+                    charSequence370 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, charSequence370);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F370': "+ unionIndex370));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex371 = (decoder.readIndex());
+        if (unionIndex371 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, null);
+        } else {
+            if (unionIndex371 == 1) {
+                Utf8 charSequence371;
+                Object oldString371 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(371);
+                if (oldString371 instanceof Utf8) {
+                    charSequence371 = (decoder).readString(((Utf8) oldString371));
+                } else {
+                    charSequence371 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, charSequence371);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F371': "+ unionIndex371));
+            }
+        }
+        int unionIndex372 = (decoder.readIndex());
+        if (unionIndex372 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, null);
+        } else {
+            if (unionIndex372 == 1) {
+                Utf8 charSequence372;
+                Object oldString372 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(372);
+                if (oldString372 instanceof Utf8) {
+                    charSequence372 = (decoder).readString(((Utf8) oldString372));
+                } else {
+                    charSequence372 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, charSequence372);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F372': "+ unionIndex372));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex373 = (decoder.readIndex());
+        if (unionIndex373 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, null);
+        } else {
+            if (unionIndex373 == 1) {
+                Utf8 charSequence373;
+                Object oldString373 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(373);
+                if (oldString373 instanceof Utf8) {
+                    charSequence373 = (decoder).readString(((Utf8) oldString373));
+                } else {
+                    charSequence373 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, charSequence373);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F373': "+ unionIndex373));
+            }
+        }
+        int unionIndex374 = (decoder.readIndex());
+        if (unionIndex374 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, null);
+        } else {
+            if (unionIndex374 == 1) {
+                Utf8 charSequence374;
+                Object oldString374 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(374);
+                if (oldString374 instanceof Utf8) {
+                    charSequence374 = (decoder).readString(((Utf8) oldString374));
+                } else {
+                    charSequence374 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, charSequence374);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F374': "+ unionIndex374));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex375 = (decoder.readIndex());
+        if (unionIndex375 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, null);
+        } else {
+            if (unionIndex375 == 1) {
+                Utf8 charSequence375;
+                Object oldString375 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(375);
+                if (oldString375 instanceof Utf8) {
+                    charSequence375 = (decoder).readString(((Utf8) oldString375));
+                } else {
+                    charSequence375 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, charSequence375);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F375': "+ unionIndex375));
+            }
+        }
+        int unionIndex376 = (decoder.readIndex());
+        if (unionIndex376 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, null);
+        } else {
+            if (unionIndex376 == 1) {
+                Utf8 charSequence376;
+                Object oldString376 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(376);
+                if (oldString376 instanceof Utf8) {
+                    charSequence376 = (decoder).readString(((Utf8) oldString376));
+                } else {
+                    charSequence376 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, charSequence376);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F376': "+ unionIndex376));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex377 = (decoder.readIndex());
+        if (unionIndex377 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, null);
+        } else {
+            if (unionIndex377 == 1) {
+                Utf8 charSequence377;
+                Object oldString377 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(377);
+                if (oldString377 instanceof Utf8) {
+                    charSequence377 = (decoder).readString(((Utf8) oldString377));
+                } else {
+                    charSequence377 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, charSequence377);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F377': "+ unionIndex377));
+            }
+        }
+        int unionIndex378 = (decoder.readIndex());
+        if (unionIndex378 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, null);
+        } else {
+            if (unionIndex378 == 1) {
+                Utf8 charSequence378;
+                Object oldString378 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(378);
+                if (oldString378 instanceof Utf8) {
+                    charSequence378 = (decoder).readString(((Utf8) oldString378));
+                } else {
+                    charSequence378 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, charSequence378);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F378': "+ unionIndex378));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex379 = (decoder.readIndex());
+        if (unionIndex379 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, null);
+        } else {
+            if (unionIndex379 == 1) {
+                Utf8 charSequence379;
+                Object oldString379 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(379);
+                if (oldString379 instanceof Utf8) {
+                    charSequence379 = (decoder).readString(((Utf8) oldString379));
+                } else {
+                    charSequence379 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, charSequence379);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F379': "+ unionIndex379));
+            }
+        }
+        int unionIndex380 = (decoder.readIndex());
+        if (unionIndex380 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, null);
+        } else {
+            if (unionIndex380 == 1) {
+                Utf8 charSequence380;
+                Object oldString380 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(380);
+                if (oldString380 instanceof Utf8) {
+                    charSequence380 = (decoder).readString(((Utf8) oldString380));
+                } else {
+                    charSequence380 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, charSequence380);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F380': "+ unionIndex380));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex381 = (decoder.readIndex());
+        if (unionIndex381 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, null);
+        } else {
+            if (unionIndex381 == 1) {
+                Utf8 charSequence381;
+                Object oldString381 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(381);
+                if (oldString381 instanceof Utf8) {
+                    charSequence381 = (decoder).readString(((Utf8) oldString381));
+                } else {
+                    charSequence381 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, charSequence381);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F381': "+ unionIndex381));
+            }
+        }
+        int unionIndex382 = (decoder.readIndex());
+        if (unionIndex382 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, null);
+        } else {
+            if (unionIndex382 == 1) {
+                Utf8 charSequence382;
+                Object oldString382 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(382);
+                if (oldString382 instanceof Utf8) {
+                    charSequence382 = (decoder).readString(((Utf8) oldString382));
+                } else {
+                    charSequence382 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, charSequence382);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F382': "+ unionIndex382));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex383 = (decoder.readIndex());
+        if (unionIndex383 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, null);
+        } else {
+            if (unionIndex383 == 1) {
+                Utf8 charSequence383;
+                Object oldString383 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(383);
+                if (oldString383 instanceof Utf8) {
+                    charSequence383 = (decoder).readString(((Utf8) oldString383));
+                } else {
+                    charSequence383 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, charSequence383);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F383': "+ unionIndex383));
+            }
+        }
+        int unionIndex384 = (decoder.readIndex());
+        if (unionIndex384 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, null);
+        } else {
+            if (unionIndex384 == 1) {
+                Utf8 charSequence384;
+                Object oldString384 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(384);
+                if (oldString384 instanceof Utf8) {
+                    charSequence384 = (decoder).readString(((Utf8) oldString384));
+                } else {
+                    charSequence384 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, charSequence384);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F384': "+ unionIndex384));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex385 = (decoder.readIndex());
+        if (unionIndex385 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, null);
+        } else {
+            if (unionIndex385 == 1) {
+                Utf8 charSequence385;
+                Object oldString385 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(385);
+                if (oldString385 instanceof Utf8) {
+                    charSequence385 = (decoder).readString(((Utf8) oldString385));
+                } else {
+                    charSequence385 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, charSequence385);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F385': "+ unionIndex385));
+            }
+        }
+        int unionIndex386 = (decoder.readIndex());
+        if (unionIndex386 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, null);
+        } else {
+            if (unionIndex386 == 1) {
+                Utf8 charSequence386;
+                Object oldString386 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(386);
+                if (oldString386 instanceof Utf8) {
+                    charSequence386 = (decoder).readString(((Utf8) oldString386));
+                } else {
+                    charSequence386 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, charSequence386);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F386': "+ unionIndex386));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex387 = (decoder.readIndex());
+        if (unionIndex387 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, null);
+        } else {
+            if (unionIndex387 == 1) {
+                Utf8 charSequence387;
+                Object oldString387 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(387);
+                if (oldString387 instanceof Utf8) {
+                    charSequence387 = (decoder).readString(((Utf8) oldString387));
+                } else {
+                    charSequence387 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, charSequence387);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F387': "+ unionIndex387));
+            }
+        }
+        int unionIndex388 = (decoder.readIndex());
+        if (unionIndex388 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, null);
+        } else {
+            if (unionIndex388 == 1) {
+                Utf8 charSequence388;
+                Object oldString388 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(388);
+                if (oldString388 instanceof Utf8) {
+                    charSequence388 = (decoder).readString(((Utf8) oldString388));
+                } else {
+                    charSequence388 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, charSequence388);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F388': "+ unionIndex388));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex389 = (decoder.readIndex());
+        if (unionIndex389 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, null);
+        } else {
+            if (unionIndex389 == 1) {
+                Utf8 charSequence389;
+                Object oldString389 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(389);
+                if (oldString389 instanceof Utf8) {
+                    charSequence389 = (decoder).readString(((Utf8) oldString389));
+                } else {
+                    charSequence389 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, charSequence389);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F389': "+ unionIndex389));
+            }
+        }
+        int unionIndex390 = (decoder.readIndex());
+        if (unionIndex390 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, null);
+        } else {
+            if (unionIndex390 == 1) {
+                Utf8 charSequence390;
+                Object oldString390 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(390);
+                if (oldString390 instanceof Utf8) {
+                    charSequence390 = (decoder).readString(((Utf8) oldString390));
+                } else {
+                    charSequence390 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, charSequence390);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F390': "+ unionIndex390));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex391 = (decoder.readIndex());
+        if (unionIndex391 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, null);
+        } else {
+            if (unionIndex391 == 1) {
+                Utf8 charSequence391;
+                Object oldString391 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(391);
+                if (oldString391 instanceof Utf8) {
+                    charSequence391 = (decoder).readString(((Utf8) oldString391));
+                } else {
+                    charSequence391 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, charSequence391);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F391': "+ unionIndex391));
+            }
+        }
+        int unionIndex392 = (decoder.readIndex());
+        if (unionIndex392 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, null);
+        } else {
+            if (unionIndex392 == 1) {
+                Utf8 charSequence392;
+                Object oldString392 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(392);
+                if (oldString392 instanceof Utf8) {
+                    charSequence392 = (decoder).readString(((Utf8) oldString392));
+                } else {
+                    charSequence392 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, charSequence392);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F392': "+ unionIndex392));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex393 = (decoder.readIndex());
+        if (unionIndex393 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, null);
+        } else {
+            if (unionIndex393 == 1) {
+                Utf8 charSequence393;
+                Object oldString393 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(393);
+                if (oldString393 instanceof Utf8) {
+                    charSequence393 = (decoder).readString(((Utf8) oldString393));
+                } else {
+                    charSequence393 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, charSequence393);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F393': "+ unionIndex393));
+            }
+        }
+        int unionIndex394 = (decoder.readIndex());
+        if (unionIndex394 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, null);
+        } else {
+            if (unionIndex394 == 1) {
+                Utf8 charSequence394;
+                Object oldString394 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(394);
+                if (oldString394 instanceof Utf8) {
+                    charSequence394 = (decoder).readString(((Utf8) oldString394));
+                } else {
+                    charSequence394 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, charSequence394);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F394': "+ unionIndex394));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex395 = (decoder.readIndex());
+        if (unionIndex395 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, null);
+        } else {
+            if (unionIndex395 == 1) {
+                Utf8 charSequence395;
+                Object oldString395 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(395);
+                if (oldString395 instanceof Utf8) {
+                    charSequence395 = (decoder).readString(((Utf8) oldString395));
+                } else {
+                    charSequence395 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, charSequence395);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F395': "+ unionIndex395));
+            }
+        }
+        int unionIndex396 = (decoder.readIndex());
+        if (unionIndex396 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, null);
+        } else {
+            if (unionIndex396 == 1) {
+                Utf8 charSequence396;
+                Object oldString396 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(396);
+                if (oldString396 instanceof Utf8) {
+                    charSequence396 = (decoder).readString(((Utf8) oldString396));
+                } else {
+                    charSequence396 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, charSequence396);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F396': "+ unionIndex396));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex397 = (decoder.readIndex());
+        if (unionIndex397 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, null);
+        } else {
+            if (unionIndex397 == 1) {
+                Utf8 charSequence397;
+                Object oldString397 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(397);
+                if (oldString397 instanceof Utf8) {
+                    charSequence397 = (decoder).readString(((Utf8) oldString397));
+                } else {
+                    charSequence397 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, charSequence397);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F397': "+ unionIndex397));
+            }
+        }
+        int unionIndex398 = (decoder.readIndex());
+        if (unionIndex398 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, null);
+        } else {
+            if (unionIndex398 == 1) {
+                Utf8 charSequence398;
+                Object oldString398 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(398);
+                if (oldString398 instanceof Utf8) {
+                    charSequence398 = (decoder).readString(((Utf8) oldString398));
+                } else {
+                    charSequence398 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, charSequence398);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F398': "+ unionIndex398));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex399 = (decoder.readIndex());
+        if (unionIndex399 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, null);
+        } else {
+            if (unionIndex399 == 1) {
+                Utf8 charSequence399;
+                Object oldString399 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(399);
+                if (oldString399 instanceof Utf8) {
+                    charSequence399 = (decoder).readString(((Utf8) oldString399));
+                } else {
+                    charSequence399 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, charSequence399);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F399': "+ unionIndex399));
+            }
+        }
+        int unionIndex400 = (decoder.readIndex());
+        if (unionIndex400 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, null);
+        } else {
+            if (unionIndex400 == 1) {
+                Utf8 charSequence400;
+                Object oldString400 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(400);
+                if (oldString400 instanceof Utf8) {
+                    charSequence400 = (decoder).readString(((Utf8) oldString400));
+                } else {
+                    charSequence400 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, charSequence400);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F400': "+ unionIndex400));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex401 = (decoder.readIndex());
+        if (unionIndex401 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, null);
+        } else {
+            if (unionIndex401 == 1) {
+                Utf8 charSequence401;
+                Object oldString401 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(401);
+                if (oldString401 instanceof Utf8) {
+                    charSequence401 = (decoder).readString(((Utf8) oldString401));
+                } else {
+                    charSequence401 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, charSequence401);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F401': "+ unionIndex401));
+            }
+        }
+        int unionIndex402 = (decoder.readIndex());
+        if (unionIndex402 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, null);
+        } else {
+            if (unionIndex402 == 1) {
+                Utf8 charSequence402;
+                Object oldString402 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(402);
+                if (oldString402 instanceof Utf8) {
+                    charSequence402 = (decoder).readString(((Utf8) oldString402));
+                } else {
+                    charSequence402 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, charSequence402);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F402': "+ unionIndex402));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex403 = (decoder.readIndex());
+        if (unionIndex403 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, null);
+        } else {
+            if (unionIndex403 == 1) {
+                Utf8 charSequence403;
+                Object oldString403 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(403);
+                if (oldString403 instanceof Utf8) {
+                    charSequence403 = (decoder).readString(((Utf8) oldString403));
+                } else {
+                    charSequence403 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, charSequence403);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F403': "+ unionIndex403));
+            }
+        }
+        int unionIndex404 = (decoder.readIndex());
+        if (unionIndex404 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, null);
+        } else {
+            if (unionIndex404 == 1) {
+                Utf8 charSequence404;
+                Object oldString404 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(404);
+                if (oldString404 instanceof Utf8) {
+                    charSequence404 = (decoder).readString(((Utf8) oldString404));
+                } else {
+                    charSequence404 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, charSequence404);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F404': "+ unionIndex404));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex405 = (decoder.readIndex());
+        if (unionIndex405 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, null);
+        } else {
+            if (unionIndex405 == 1) {
+                Utf8 charSequence405;
+                Object oldString405 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(405);
+                if (oldString405 instanceof Utf8) {
+                    charSequence405 = (decoder).readString(((Utf8) oldString405));
+                } else {
+                    charSequence405 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, charSequence405);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F405': "+ unionIndex405));
+            }
+        }
+        int unionIndex406 = (decoder.readIndex());
+        if (unionIndex406 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, null);
+        } else {
+            if (unionIndex406 == 1) {
+                Utf8 charSequence406;
+                Object oldString406 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(406);
+                if (oldString406 instanceof Utf8) {
+                    charSequence406 = (decoder).readString(((Utf8) oldString406));
+                } else {
+                    charSequence406 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, charSequence406);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F406': "+ unionIndex406));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex407 = (decoder.readIndex());
+        if (unionIndex407 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, null);
+        } else {
+            if (unionIndex407 == 1) {
+                Utf8 charSequence407;
+                Object oldString407 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(407);
+                if (oldString407 instanceof Utf8) {
+                    charSequence407 = (decoder).readString(((Utf8) oldString407));
+                } else {
+                    charSequence407 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, charSequence407);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F407': "+ unionIndex407));
+            }
+        }
+        int unionIndex408 = (decoder.readIndex());
+        if (unionIndex408 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, null);
+        } else {
+            if (unionIndex408 == 1) {
+                Utf8 charSequence408;
+                Object oldString408 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(408);
+                if (oldString408 instanceof Utf8) {
+                    charSequence408 = (decoder).readString(((Utf8) oldString408));
+                } else {
+                    charSequence408 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, charSequence408);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F408': "+ unionIndex408));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex409 = (decoder.readIndex());
+        if (unionIndex409 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, null);
+        } else {
+            if (unionIndex409 == 1) {
+                Utf8 charSequence409;
+                Object oldString409 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(409);
+                if (oldString409 instanceof Utf8) {
+                    charSequence409 = (decoder).readString(((Utf8) oldString409));
+                } else {
+                    charSequence409 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, charSequence409);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F409': "+ unionIndex409));
+            }
+        }
+        int unionIndex410 = (decoder.readIndex());
+        if (unionIndex410 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, null);
+        } else {
+            if (unionIndex410 == 1) {
+                Utf8 charSequence410;
+                Object oldString410 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(410);
+                if (oldString410 instanceof Utf8) {
+                    charSequence410 = (decoder).readString(((Utf8) oldString410));
+                } else {
+                    charSequence410 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, charSequence410);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F410': "+ unionIndex410));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex411 = (decoder.readIndex());
+        if (unionIndex411 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, null);
+        } else {
+            if (unionIndex411 == 1) {
+                Utf8 charSequence411;
+                Object oldString411 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(411);
+                if (oldString411 instanceof Utf8) {
+                    charSequence411 = (decoder).readString(((Utf8) oldString411));
+                } else {
+                    charSequence411 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, charSequence411);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F411': "+ unionIndex411));
+            }
+        }
+        int unionIndex412 = (decoder.readIndex());
+        if (unionIndex412 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, null);
+        } else {
+            if (unionIndex412 == 1) {
+                Utf8 charSequence412;
+                Object oldString412 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(412);
+                if (oldString412 instanceof Utf8) {
+                    charSequence412 = (decoder).readString(((Utf8) oldString412));
+                } else {
+                    charSequence412 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, charSequence412);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F412': "+ unionIndex412));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex413 = (decoder.readIndex());
+        if (unionIndex413 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, null);
+        } else {
+            if (unionIndex413 == 1) {
+                Utf8 charSequence413;
+                Object oldString413 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(413);
+                if (oldString413 instanceof Utf8) {
+                    charSequence413 = (decoder).readString(((Utf8) oldString413));
+                } else {
+                    charSequence413 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, charSequence413);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F413': "+ unionIndex413));
+            }
+        }
+        int unionIndex414 = (decoder.readIndex());
+        if (unionIndex414 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, null);
+        } else {
+            if (unionIndex414 == 1) {
+                Utf8 charSequence414;
+                Object oldString414 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(414);
+                if (oldString414 instanceof Utf8) {
+                    charSequence414 = (decoder).readString(((Utf8) oldString414));
+                } else {
+                    charSequence414 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, charSequence414);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F414': "+ unionIndex414));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex415 = (decoder.readIndex());
+        if (unionIndex415 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, null);
+        } else {
+            if (unionIndex415 == 1) {
+                Utf8 charSequence415;
+                Object oldString415 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(415);
+                if (oldString415 instanceof Utf8) {
+                    charSequence415 = (decoder).readString(((Utf8) oldString415));
+                } else {
+                    charSequence415 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, charSequence415);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F415': "+ unionIndex415));
+            }
+        }
+        int unionIndex416 = (decoder.readIndex());
+        if (unionIndex416 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, null);
+        } else {
+            if (unionIndex416 == 1) {
+                Utf8 charSequence416;
+                Object oldString416 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(416);
+                if (oldString416 instanceof Utf8) {
+                    charSequence416 = (decoder).readString(((Utf8) oldString416));
+                } else {
+                    charSequence416 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, charSequence416);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F416': "+ unionIndex416));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex417 = (decoder.readIndex());
+        if (unionIndex417 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, null);
+        } else {
+            if (unionIndex417 == 1) {
+                Utf8 charSequence417;
+                Object oldString417 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(417);
+                if (oldString417 instanceof Utf8) {
+                    charSequence417 = (decoder).readString(((Utf8) oldString417));
+                } else {
+                    charSequence417 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, charSequence417);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F417': "+ unionIndex417));
+            }
+        }
+        int unionIndex418 = (decoder.readIndex());
+        if (unionIndex418 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, null);
+        } else {
+            if (unionIndex418 == 1) {
+                Utf8 charSequence418;
+                Object oldString418 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(418);
+                if (oldString418 instanceof Utf8) {
+                    charSequence418 = (decoder).readString(((Utf8) oldString418));
+                } else {
+                    charSequence418 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, charSequence418);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F418': "+ unionIndex418));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex419 = (decoder.readIndex());
+        if (unionIndex419 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, null);
+        } else {
+            if (unionIndex419 == 1) {
+                Utf8 charSequence419;
+                Object oldString419 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(419);
+                if (oldString419 instanceof Utf8) {
+                    charSequence419 = (decoder).readString(((Utf8) oldString419));
+                } else {
+                    charSequence419 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, charSequence419);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F419': "+ unionIndex419));
+            }
+        }
+        int unionIndex420 = (decoder.readIndex());
+        if (unionIndex420 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, null);
+        } else {
+            if (unionIndex420 == 1) {
+                Utf8 charSequence420;
+                Object oldString420 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(420);
+                if (oldString420 instanceof Utf8) {
+                    charSequence420 = (decoder).readString(((Utf8) oldString420));
+                } else {
+                    charSequence420 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, charSequence420);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F420': "+ unionIndex420));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex421 = (decoder.readIndex());
+        if (unionIndex421 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, null);
+        } else {
+            if (unionIndex421 == 1) {
+                Utf8 charSequence421;
+                Object oldString421 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(421);
+                if (oldString421 instanceof Utf8) {
+                    charSequence421 = (decoder).readString(((Utf8) oldString421));
+                } else {
+                    charSequence421 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, charSequence421);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F421': "+ unionIndex421));
+            }
+        }
+        int unionIndex422 = (decoder.readIndex());
+        if (unionIndex422 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, null);
+        } else {
+            if (unionIndex422 == 1) {
+                Utf8 charSequence422;
+                Object oldString422 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(422);
+                if (oldString422 instanceof Utf8) {
+                    charSequence422 = (decoder).readString(((Utf8) oldString422));
+                } else {
+                    charSequence422 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, charSequence422);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F422': "+ unionIndex422));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex423 = (decoder.readIndex());
+        if (unionIndex423 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, null);
+        } else {
+            if (unionIndex423 == 1) {
+                Utf8 charSequence423;
+                Object oldString423 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(423);
+                if (oldString423 instanceof Utf8) {
+                    charSequence423 = (decoder).readString(((Utf8) oldString423));
+                } else {
+                    charSequence423 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, charSequence423);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F423': "+ unionIndex423));
+            }
+        }
+        int unionIndex424 = (decoder.readIndex());
+        if (unionIndex424 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, null);
+        } else {
+            if (unionIndex424 == 1) {
+                Utf8 charSequence424;
+                Object oldString424 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(424);
+                if (oldString424 instanceof Utf8) {
+                    charSequence424 = (decoder).readString(((Utf8) oldString424));
+                } else {
+                    charSequence424 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, charSequence424);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F424': "+ unionIndex424));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex425 = (decoder.readIndex());
+        if (unionIndex425 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, null);
+        } else {
+            if (unionIndex425 == 1) {
+                Utf8 charSequence425;
+                Object oldString425 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(425);
+                if (oldString425 instanceof Utf8) {
+                    charSequence425 = (decoder).readString(((Utf8) oldString425));
+                } else {
+                    charSequence425 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, charSequence425);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F425': "+ unionIndex425));
+            }
+        }
+        int unionIndex426 = (decoder.readIndex());
+        if (unionIndex426 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, null);
+        } else {
+            if (unionIndex426 == 1) {
+                Utf8 charSequence426;
+                Object oldString426 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(426);
+                if (oldString426 instanceof Utf8) {
+                    charSequence426 = (decoder).readString(((Utf8) oldString426));
+                } else {
+                    charSequence426 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, charSequence426);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F426': "+ unionIndex426));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex427 = (decoder.readIndex());
+        if (unionIndex427 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, null);
+        } else {
+            if (unionIndex427 == 1) {
+                Utf8 charSequence427;
+                Object oldString427 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(427);
+                if (oldString427 instanceof Utf8) {
+                    charSequence427 = (decoder).readString(((Utf8) oldString427));
+                } else {
+                    charSequence427 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, charSequence427);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F427': "+ unionIndex427));
+            }
+        }
+        int unionIndex428 = (decoder.readIndex());
+        if (unionIndex428 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, null);
+        } else {
+            if (unionIndex428 == 1) {
+                Utf8 charSequence428;
+                Object oldString428 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(428);
+                if (oldString428 instanceof Utf8) {
+                    charSequence428 = (decoder).readString(((Utf8) oldString428));
+                } else {
+                    charSequence428 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, charSequence428);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F428': "+ unionIndex428));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex429 = (decoder.readIndex());
+        if (unionIndex429 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, null);
+        } else {
+            if (unionIndex429 == 1) {
+                Utf8 charSequence429;
+                Object oldString429 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(429);
+                if (oldString429 instanceof Utf8) {
+                    charSequence429 = (decoder).readString(((Utf8) oldString429));
+                } else {
+                    charSequence429 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, charSequence429);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F429': "+ unionIndex429));
+            }
+        }
+        int unionIndex430 = (decoder.readIndex());
+        if (unionIndex430 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, null);
+        } else {
+            if (unionIndex430 == 1) {
+                Utf8 charSequence430;
+                Object oldString430 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(430);
+                if (oldString430 instanceof Utf8) {
+                    charSequence430 = (decoder).readString(((Utf8) oldString430));
+                } else {
+                    charSequence430 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, charSequence430);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F430': "+ unionIndex430));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex431 = (decoder.readIndex());
+        if (unionIndex431 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, null);
+        } else {
+            if (unionIndex431 == 1) {
+                Utf8 charSequence431;
+                Object oldString431 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(431);
+                if (oldString431 instanceof Utf8) {
+                    charSequence431 = (decoder).readString(((Utf8) oldString431));
+                } else {
+                    charSequence431 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, charSequence431);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F431': "+ unionIndex431));
+            }
+        }
+        int unionIndex432 = (decoder.readIndex());
+        if (unionIndex432 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, null);
+        } else {
+            if (unionIndex432 == 1) {
+                Utf8 charSequence432;
+                Object oldString432 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(432);
+                if (oldString432 instanceof Utf8) {
+                    charSequence432 = (decoder).readString(((Utf8) oldString432));
+                } else {
+                    charSequence432 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, charSequence432);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F432': "+ unionIndex432));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex433 = (decoder.readIndex());
+        if (unionIndex433 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, null);
+        } else {
+            if (unionIndex433 == 1) {
+                Utf8 charSequence433;
+                Object oldString433 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(433);
+                if (oldString433 instanceof Utf8) {
+                    charSequence433 = (decoder).readString(((Utf8) oldString433));
+                } else {
+                    charSequence433 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, charSequence433);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F433': "+ unionIndex433));
+            }
+        }
+        int unionIndex434 = (decoder.readIndex());
+        if (unionIndex434 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, null);
+        } else {
+            if (unionIndex434 == 1) {
+                Utf8 charSequence434;
+                Object oldString434 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(434);
+                if (oldString434 instanceof Utf8) {
+                    charSequence434 = (decoder).readString(((Utf8) oldString434));
+                } else {
+                    charSequence434 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, charSequence434);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F434': "+ unionIndex434));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex435 = (decoder.readIndex());
+        if (unionIndex435 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, null);
+        } else {
+            if (unionIndex435 == 1) {
+                Utf8 charSequence435;
+                Object oldString435 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(435);
+                if (oldString435 instanceof Utf8) {
+                    charSequence435 = (decoder).readString(((Utf8) oldString435));
+                } else {
+                    charSequence435 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, charSequence435);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F435': "+ unionIndex435));
+            }
+        }
+        int unionIndex436 = (decoder.readIndex());
+        if (unionIndex436 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, null);
+        } else {
+            if (unionIndex436 == 1) {
+                Utf8 charSequence436;
+                Object oldString436 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(436);
+                if (oldString436 instanceof Utf8) {
+                    charSequence436 = (decoder).readString(((Utf8) oldString436));
+                } else {
+                    charSequence436 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, charSequence436);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F436': "+ unionIndex436));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex437 = (decoder.readIndex());
+        if (unionIndex437 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, null);
+        } else {
+            if (unionIndex437 == 1) {
+                Utf8 charSequence437;
+                Object oldString437 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(437);
+                if (oldString437 instanceof Utf8) {
+                    charSequence437 = (decoder).readString(((Utf8) oldString437));
+                } else {
+                    charSequence437 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, charSequence437);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F437': "+ unionIndex437));
+            }
+        }
+        int unionIndex438 = (decoder.readIndex());
+        if (unionIndex438 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, null);
+        } else {
+            if (unionIndex438 == 1) {
+                Utf8 charSequence438;
+                Object oldString438 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(438);
+                if (oldString438 instanceof Utf8) {
+                    charSequence438 = (decoder).readString(((Utf8) oldString438));
+                } else {
+                    charSequence438 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, charSequence438);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F438': "+ unionIndex438));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex439 = (decoder.readIndex());
+        if (unionIndex439 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, null);
+        } else {
+            if (unionIndex439 == 1) {
+                Utf8 charSequence439;
+                Object oldString439 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(439);
+                if (oldString439 instanceof Utf8) {
+                    charSequence439 = (decoder).readString(((Utf8) oldString439));
+                } else {
+                    charSequence439 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, charSequence439);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F439': "+ unionIndex439));
+            }
+        }
+        int unionIndex440 = (decoder.readIndex());
+        if (unionIndex440 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, null);
+        } else {
+            if (unionIndex440 == 1) {
+                Utf8 charSequence440;
+                Object oldString440 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(440);
+                if (oldString440 instanceof Utf8) {
+                    charSequence440 = (decoder).readString(((Utf8) oldString440));
+                } else {
+                    charSequence440 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, charSequence440);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F440': "+ unionIndex440));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex441 = (decoder.readIndex());
+        if (unionIndex441 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, null);
+        } else {
+            if (unionIndex441 == 1) {
+                Utf8 charSequence441;
+                Object oldString441 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(441);
+                if (oldString441 instanceof Utf8) {
+                    charSequence441 = (decoder).readString(((Utf8) oldString441));
+                } else {
+                    charSequence441 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, charSequence441);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F441': "+ unionIndex441));
+            }
+        }
+        int unionIndex442 = (decoder.readIndex());
+        if (unionIndex442 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, null);
+        } else {
+            if (unionIndex442 == 1) {
+                Utf8 charSequence442;
+                Object oldString442 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(442);
+                if (oldString442 instanceof Utf8) {
+                    charSequence442 = (decoder).readString(((Utf8) oldString442));
+                } else {
+                    charSequence442 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, charSequence442);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F442': "+ unionIndex442));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex443 = (decoder.readIndex());
+        if (unionIndex443 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, null);
+        } else {
+            if (unionIndex443 == 1) {
+                Utf8 charSequence443;
+                Object oldString443 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(443);
+                if (oldString443 instanceof Utf8) {
+                    charSequence443 = (decoder).readString(((Utf8) oldString443));
+                } else {
+                    charSequence443 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, charSequence443);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F443': "+ unionIndex443));
+            }
+        }
+        int unionIndex444 = (decoder.readIndex());
+        if (unionIndex444 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, null);
+        } else {
+            if (unionIndex444 == 1) {
+                Utf8 charSequence444;
+                Object oldString444 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(444);
+                if (oldString444 instanceof Utf8) {
+                    charSequence444 = (decoder).readString(((Utf8) oldString444));
+                } else {
+                    charSequence444 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, charSequence444);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F444': "+ unionIndex444));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex445 = (decoder.readIndex());
+        if (unionIndex445 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, null);
+        } else {
+            if (unionIndex445 == 1) {
+                Utf8 charSequence445;
+                Object oldString445 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(445);
+                if (oldString445 instanceof Utf8) {
+                    charSequence445 = (decoder).readString(((Utf8) oldString445));
+                } else {
+                    charSequence445 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, charSequence445);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F445': "+ unionIndex445));
+            }
+        }
+        int unionIndex446 = (decoder.readIndex());
+        if (unionIndex446 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, null);
+        } else {
+            if (unionIndex446 == 1) {
+                Utf8 charSequence446;
+                Object oldString446 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(446);
+                if (oldString446 instanceof Utf8) {
+                    charSequence446 = (decoder).readString(((Utf8) oldString446));
+                } else {
+                    charSequence446 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, charSequence446);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F446': "+ unionIndex446));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex447 = (decoder.readIndex());
+        if (unionIndex447 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, null);
+        } else {
+            if (unionIndex447 == 1) {
+                Utf8 charSequence447;
+                Object oldString447 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(447);
+                if (oldString447 instanceof Utf8) {
+                    charSequence447 = (decoder).readString(((Utf8) oldString447));
+                } else {
+                    charSequence447 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, charSequence447);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F447': "+ unionIndex447));
+            }
+        }
+        int unionIndex448 = (decoder.readIndex());
+        if (unionIndex448 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, null);
+        } else {
+            if (unionIndex448 == 1) {
+                Utf8 charSequence448;
+                Object oldString448 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(448);
+                if (oldString448 instanceof Utf8) {
+                    charSequence448 = (decoder).readString(((Utf8) oldString448));
+                } else {
+                    charSequence448 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, charSequence448);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F448': "+ unionIndex448));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex449 = (decoder.readIndex());
+        if (unionIndex449 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, null);
+        } else {
+            if (unionIndex449 == 1) {
+                Utf8 charSequence449;
+                Object oldString449 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(449);
+                if (oldString449 instanceof Utf8) {
+                    charSequence449 = (decoder).readString(((Utf8) oldString449));
+                } else {
+                    charSequence449 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, charSequence449);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F449': "+ unionIndex449));
+            }
+        }
+        int unionIndex450 = (decoder.readIndex());
+        if (unionIndex450 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, null);
+        } else {
+            if (unionIndex450 == 1) {
+                Utf8 charSequence450;
+                Object oldString450 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(450);
+                if (oldString450 instanceof Utf8) {
+                    charSequence450 = (decoder).readString(((Utf8) oldString450));
+                } else {
+                    charSequence450 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, charSequence450);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F450': "+ unionIndex450));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex451 = (decoder.readIndex());
+        if (unionIndex451 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, null);
+        } else {
+            if (unionIndex451 == 1) {
+                Utf8 charSequence451;
+                Object oldString451 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(451);
+                if (oldString451 instanceof Utf8) {
+                    charSequence451 = (decoder).readString(((Utf8) oldString451));
+                } else {
+                    charSequence451 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, charSequence451);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F451': "+ unionIndex451));
+            }
+        }
+        int unionIndex452 = (decoder.readIndex());
+        if (unionIndex452 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, null);
+        } else {
+            if (unionIndex452 == 1) {
+                Utf8 charSequence452;
+                Object oldString452 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(452);
+                if (oldString452 instanceof Utf8) {
+                    charSequence452 = (decoder).readString(((Utf8) oldString452));
+                } else {
+                    charSequence452 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, charSequence452);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F452': "+ unionIndex452));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex453 = (decoder.readIndex());
+        if (unionIndex453 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, null);
+        } else {
+            if (unionIndex453 == 1) {
+                Utf8 charSequence453;
+                Object oldString453 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(453);
+                if (oldString453 instanceof Utf8) {
+                    charSequence453 = (decoder).readString(((Utf8) oldString453));
+                } else {
+                    charSequence453 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, charSequence453);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F453': "+ unionIndex453));
+            }
+        }
+        int unionIndex454 = (decoder.readIndex());
+        if (unionIndex454 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, null);
+        } else {
+            if (unionIndex454 == 1) {
+                Utf8 charSequence454;
+                Object oldString454 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(454);
+                if (oldString454 instanceof Utf8) {
+                    charSequence454 = (decoder).readString(((Utf8) oldString454));
+                } else {
+                    charSequence454 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, charSequence454);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F454': "+ unionIndex454));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex455 = (decoder.readIndex());
+        if (unionIndex455 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, null);
+        } else {
+            if (unionIndex455 == 1) {
+                Utf8 charSequence455;
+                Object oldString455 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(455);
+                if (oldString455 instanceof Utf8) {
+                    charSequence455 = (decoder).readString(((Utf8) oldString455));
+                } else {
+                    charSequence455 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, charSequence455);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F455': "+ unionIndex455));
+            }
+        }
+        int unionIndex456 = (decoder.readIndex());
+        if (unionIndex456 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, null);
+        } else {
+            if (unionIndex456 == 1) {
+                Utf8 charSequence456;
+                Object oldString456 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(456);
+                if (oldString456 instanceof Utf8) {
+                    charSequence456 = (decoder).readString(((Utf8) oldString456));
+                } else {
+                    charSequence456 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, charSequence456);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F456': "+ unionIndex456));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex457 = (decoder.readIndex());
+        if (unionIndex457 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, null);
+        } else {
+            if (unionIndex457 == 1) {
+                Utf8 charSequence457;
+                Object oldString457 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(457);
+                if (oldString457 instanceof Utf8) {
+                    charSequence457 = (decoder).readString(((Utf8) oldString457));
+                } else {
+                    charSequence457 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, charSequence457);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F457': "+ unionIndex457));
+            }
+        }
+        int unionIndex458 = (decoder.readIndex());
+        if (unionIndex458 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, null);
+        } else {
+            if (unionIndex458 == 1) {
+                Utf8 charSequence458;
+                Object oldString458 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(458);
+                if (oldString458 instanceof Utf8) {
+                    charSequence458 = (decoder).readString(((Utf8) oldString458));
+                } else {
+                    charSequence458 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, charSequence458);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F458': "+ unionIndex458));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex459 = (decoder.readIndex());
+        if (unionIndex459 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, null);
+        } else {
+            if (unionIndex459 == 1) {
+                Utf8 charSequence459;
+                Object oldString459 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(459);
+                if (oldString459 instanceof Utf8) {
+                    charSequence459 = (decoder).readString(((Utf8) oldString459));
+                } else {
+                    charSequence459 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, charSequence459);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F459': "+ unionIndex459));
+            }
+        }
+        int unionIndex460 = (decoder.readIndex());
+        if (unionIndex460 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, null);
+        } else {
+            if (unionIndex460 == 1) {
+                Utf8 charSequence460;
+                Object oldString460 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(460);
+                if (oldString460 instanceof Utf8) {
+                    charSequence460 = (decoder).readString(((Utf8) oldString460));
+                } else {
+                    charSequence460 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, charSequence460);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F460': "+ unionIndex460));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex461 = (decoder.readIndex());
+        if (unionIndex461 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, null);
+        } else {
+            if (unionIndex461 == 1) {
+                Utf8 charSequence461;
+                Object oldString461 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(461);
+                if (oldString461 instanceof Utf8) {
+                    charSequence461 = (decoder).readString(((Utf8) oldString461));
+                } else {
+                    charSequence461 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, charSequence461);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F461': "+ unionIndex461));
+            }
+        }
+        int unionIndex462 = (decoder.readIndex());
+        if (unionIndex462 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, null);
+        } else {
+            if (unionIndex462 == 1) {
+                Utf8 charSequence462;
+                Object oldString462 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(462);
+                if (oldString462 instanceof Utf8) {
+                    charSequence462 = (decoder).readString(((Utf8) oldString462));
+                } else {
+                    charSequence462 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, charSequence462);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F462': "+ unionIndex462));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex463 = (decoder.readIndex());
+        if (unionIndex463 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, null);
+        } else {
+            if (unionIndex463 == 1) {
+                Utf8 charSequence463;
+                Object oldString463 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(463);
+                if (oldString463 instanceof Utf8) {
+                    charSequence463 = (decoder).readString(((Utf8) oldString463));
+                } else {
+                    charSequence463 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, charSequence463);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F463': "+ unionIndex463));
+            }
+        }
+        int unionIndex464 = (decoder.readIndex());
+        if (unionIndex464 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, null);
+        } else {
+            if (unionIndex464 == 1) {
+                Utf8 charSequence464;
+                Object oldString464 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(464);
+                if (oldString464 instanceof Utf8) {
+                    charSequence464 = (decoder).readString(((Utf8) oldString464));
+                } else {
+                    charSequence464 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, charSequence464);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F464': "+ unionIndex464));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex465 = (decoder.readIndex());
+        if (unionIndex465 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, null);
+        } else {
+            if (unionIndex465 == 1) {
+                Utf8 charSequence465;
+                Object oldString465 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(465);
+                if (oldString465 instanceof Utf8) {
+                    charSequence465 = (decoder).readString(((Utf8) oldString465));
+                } else {
+                    charSequence465 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, charSequence465);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F465': "+ unionIndex465));
+            }
+        }
+        int unionIndex466 = (decoder.readIndex());
+        if (unionIndex466 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, null);
+        } else {
+            if (unionIndex466 == 1) {
+                Utf8 charSequence466;
+                Object oldString466 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(466);
+                if (oldString466 instanceof Utf8) {
+                    charSequence466 = (decoder).readString(((Utf8) oldString466));
+                } else {
+                    charSequence466 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, charSequence466);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F466': "+ unionIndex466));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex467 = (decoder.readIndex());
+        if (unionIndex467 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, null);
+        } else {
+            if (unionIndex467 == 1) {
+                Utf8 charSequence467;
+                Object oldString467 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(467);
+                if (oldString467 instanceof Utf8) {
+                    charSequence467 = (decoder).readString(((Utf8) oldString467));
+                } else {
+                    charSequence467 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, charSequence467);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F467': "+ unionIndex467));
+            }
+        }
+        int unionIndex468 = (decoder.readIndex());
+        if (unionIndex468 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, null);
+        } else {
+            if (unionIndex468 == 1) {
+                Utf8 charSequence468;
+                Object oldString468 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(468);
+                if (oldString468 instanceof Utf8) {
+                    charSequence468 = (decoder).readString(((Utf8) oldString468));
+                } else {
+                    charSequence468 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, charSequence468);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F468': "+ unionIndex468));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex469 = (decoder.readIndex());
+        if (unionIndex469 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, null);
+        } else {
+            if (unionIndex469 == 1) {
+                Utf8 charSequence469;
+                Object oldString469 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(469);
+                if (oldString469 instanceof Utf8) {
+                    charSequence469 = (decoder).readString(((Utf8) oldString469));
+                } else {
+                    charSequence469 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, charSequence469);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F469': "+ unionIndex469));
+            }
+        }
+        int unionIndex470 = (decoder.readIndex());
+        if (unionIndex470 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, null);
+        } else {
+            if (unionIndex470 == 1) {
+                Utf8 charSequence470;
+                Object oldString470 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(470);
+                if (oldString470 instanceof Utf8) {
+                    charSequence470 = (decoder).readString(((Utf8) oldString470));
+                } else {
+                    charSequence470 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, charSequence470);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F470': "+ unionIndex470));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex471 = (decoder.readIndex());
+        if (unionIndex471 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, null);
+        } else {
+            if (unionIndex471 == 1) {
+                Utf8 charSequence471;
+                Object oldString471 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(471);
+                if (oldString471 instanceof Utf8) {
+                    charSequence471 = (decoder).readString(((Utf8) oldString471));
+                } else {
+                    charSequence471 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, charSequence471);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F471': "+ unionIndex471));
+            }
+        }
+        int unionIndex472 = (decoder.readIndex());
+        if (unionIndex472 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, null);
+        } else {
+            if (unionIndex472 == 1) {
+                Utf8 charSequence472;
+                Object oldString472 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(472);
+                if (oldString472 instanceof Utf8) {
+                    charSequence472 = (decoder).readString(((Utf8) oldString472));
+                } else {
+                    charSequence472 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, charSequence472);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F472': "+ unionIndex472));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex473 = (decoder.readIndex());
+        if (unionIndex473 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, null);
+        } else {
+            if (unionIndex473 == 1) {
+                Utf8 charSequence473;
+                Object oldString473 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(473);
+                if (oldString473 instanceof Utf8) {
+                    charSequence473 = (decoder).readString(((Utf8) oldString473));
+                } else {
+                    charSequence473 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, charSequence473);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F473': "+ unionIndex473));
+            }
+        }
+        int unionIndex474 = (decoder.readIndex());
+        if (unionIndex474 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, null);
+        } else {
+            if (unionIndex474 == 1) {
+                Utf8 charSequence474;
+                Object oldString474 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(474);
+                if (oldString474 instanceof Utf8) {
+                    charSequence474 = (decoder).readString(((Utf8) oldString474));
+                } else {
+                    charSequence474 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, charSequence474);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F474': "+ unionIndex474));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex475 = (decoder.readIndex());
+        if (unionIndex475 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, null);
+        } else {
+            if (unionIndex475 == 1) {
+                Utf8 charSequence475;
+                Object oldString475 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(475);
+                if (oldString475 instanceof Utf8) {
+                    charSequence475 = (decoder).readString(((Utf8) oldString475));
+                } else {
+                    charSequence475 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, charSequence475);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F475': "+ unionIndex475));
+            }
+        }
+        int unionIndex476 = (decoder.readIndex());
+        if (unionIndex476 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, null);
+        } else {
+            if (unionIndex476 == 1) {
+                Utf8 charSequence476;
+                Object oldString476 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(476);
+                if (oldString476 instanceof Utf8) {
+                    charSequence476 = (decoder).readString(((Utf8) oldString476));
+                } else {
+                    charSequence476 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, charSequence476);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F476': "+ unionIndex476));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex477 = (decoder.readIndex());
+        if (unionIndex477 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, null);
+        } else {
+            if (unionIndex477 == 1) {
+                Utf8 charSequence477;
+                Object oldString477 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(477);
+                if (oldString477 instanceof Utf8) {
+                    charSequence477 = (decoder).readString(((Utf8) oldString477));
+                } else {
+                    charSequence477 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, charSequence477);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F477': "+ unionIndex477));
+            }
+        }
+        int unionIndex478 = (decoder.readIndex());
+        if (unionIndex478 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, null);
+        } else {
+            if (unionIndex478 == 1) {
+                Utf8 charSequence478;
+                Object oldString478 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(478);
+                if (oldString478 instanceof Utf8) {
+                    charSequence478 = (decoder).readString(((Utf8) oldString478));
+                } else {
+                    charSequence478 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, charSequence478);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F478': "+ unionIndex478));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex479 = (decoder.readIndex());
+        if (unionIndex479 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, null);
+        } else {
+            if (unionIndex479 == 1) {
+                Utf8 charSequence479;
+                Object oldString479 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(479);
+                if (oldString479 instanceof Utf8) {
+                    charSequence479 = (decoder).readString(((Utf8) oldString479));
+                } else {
+                    charSequence479 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, charSequence479);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F479': "+ unionIndex479));
+            }
+        }
+        int unionIndex480 = (decoder.readIndex());
+        if (unionIndex480 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, null);
+        } else {
+            if (unionIndex480 == 1) {
+                Utf8 charSequence480;
+                Object oldString480 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(480);
+                if (oldString480 instanceof Utf8) {
+                    charSequence480 = (decoder).readString(((Utf8) oldString480));
+                } else {
+                    charSequence480 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, charSequence480);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F480': "+ unionIndex480));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex481 = (decoder.readIndex());
+        if (unionIndex481 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, null);
+        } else {
+            if (unionIndex481 == 1) {
+                Utf8 charSequence481;
+                Object oldString481 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(481);
+                if (oldString481 instanceof Utf8) {
+                    charSequence481 = (decoder).readString(((Utf8) oldString481));
+                } else {
+                    charSequence481 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, charSequence481);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F481': "+ unionIndex481));
+            }
+        }
+        int unionIndex482 = (decoder.readIndex());
+        if (unionIndex482 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, null);
+        } else {
+            if (unionIndex482 == 1) {
+                Utf8 charSequence482;
+                Object oldString482 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(482);
+                if (oldString482 instanceof Utf8) {
+                    charSequence482 = (decoder).readString(((Utf8) oldString482));
+                } else {
+                    charSequence482 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, charSequence482);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F482': "+ unionIndex482));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex483 = (decoder.readIndex());
+        if (unionIndex483 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, null);
+        } else {
+            if (unionIndex483 == 1) {
+                Utf8 charSequence483;
+                Object oldString483 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(483);
+                if (oldString483 instanceof Utf8) {
+                    charSequence483 = (decoder).readString(((Utf8) oldString483));
+                } else {
+                    charSequence483 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, charSequence483);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F483': "+ unionIndex483));
+            }
+        }
+        int unionIndex484 = (decoder.readIndex());
+        if (unionIndex484 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, null);
+        } else {
+            if (unionIndex484 == 1) {
+                Utf8 charSequence484;
+                Object oldString484 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(484);
+                if (oldString484 instanceof Utf8) {
+                    charSequence484 = (decoder).readString(((Utf8) oldString484));
+                } else {
+                    charSequence484 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, charSequence484);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F484': "+ unionIndex484));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex485 = (decoder.readIndex());
+        if (unionIndex485 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, null);
+        } else {
+            if (unionIndex485 == 1) {
+                Utf8 charSequence485;
+                Object oldString485 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(485);
+                if (oldString485 instanceof Utf8) {
+                    charSequence485 = (decoder).readString(((Utf8) oldString485));
+                } else {
+                    charSequence485 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, charSequence485);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F485': "+ unionIndex485));
+            }
+        }
+        int unionIndex486 = (decoder.readIndex());
+        if (unionIndex486 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, null);
+        } else {
+            if (unionIndex486 == 1) {
+                Utf8 charSequence486;
+                Object oldString486 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(486);
+                if (oldString486 instanceof Utf8) {
+                    charSequence486 = (decoder).readString(((Utf8) oldString486));
+                } else {
+                    charSequence486 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, charSequence486);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F486': "+ unionIndex486));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex487 = (decoder.readIndex());
+        if (unionIndex487 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, null);
+        } else {
+            if (unionIndex487 == 1) {
+                Utf8 charSequence487;
+                Object oldString487 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(487);
+                if (oldString487 instanceof Utf8) {
+                    charSequence487 = (decoder).readString(((Utf8) oldString487));
+                } else {
+                    charSequence487 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, charSequence487);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F487': "+ unionIndex487));
+            }
+        }
+        int unionIndex488 = (decoder.readIndex());
+        if (unionIndex488 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, null);
+        } else {
+            if (unionIndex488 == 1) {
+                Utf8 charSequence488;
+                Object oldString488 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(488);
+                if (oldString488 instanceof Utf8) {
+                    charSequence488 = (decoder).readString(((Utf8) oldString488));
+                } else {
+                    charSequence488 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, charSequence488);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F488': "+ unionIndex488));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex489 = (decoder.readIndex());
+        if (unionIndex489 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, null);
+        } else {
+            if (unionIndex489 == 1) {
+                Utf8 charSequence489;
+                Object oldString489 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(489);
+                if (oldString489 instanceof Utf8) {
+                    charSequence489 = (decoder).readString(((Utf8) oldString489));
+                } else {
+                    charSequence489 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, charSequence489);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F489': "+ unionIndex489));
+            }
+        }
+        int unionIndex490 = (decoder.readIndex());
+        if (unionIndex490 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, null);
+        } else {
+            if (unionIndex490 == 1) {
+                Utf8 charSequence490;
+                Object oldString490 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(490);
+                if (oldString490 instanceof Utf8) {
+                    charSequence490 = (decoder).readString(((Utf8) oldString490));
+                } else {
+                    charSequence490 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, charSequence490);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F490': "+ unionIndex490));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex491 = (decoder.readIndex());
+        if (unionIndex491 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, null);
+        } else {
+            if (unionIndex491 == 1) {
+                Utf8 charSequence491;
+                Object oldString491 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(491);
+                if (oldString491 instanceof Utf8) {
+                    charSequence491 = (decoder).readString(((Utf8) oldString491));
+                } else {
+                    charSequence491 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, charSequence491);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F491': "+ unionIndex491));
+            }
+        }
+        int unionIndex492 = (decoder.readIndex());
+        if (unionIndex492 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, null);
+        } else {
+            if (unionIndex492 == 1) {
+                Utf8 charSequence492;
+                Object oldString492 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(492);
+                if (oldString492 instanceof Utf8) {
+                    charSequence492 = (decoder).readString(((Utf8) oldString492));
+                } else {
+                    charSequence492 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, charSequence492);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F492': "+ unionIndex492));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex493 = (decoder.readIndex());
+        if (unionIndex493 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, null);
+        } else {
+            if (unionIndex493 == 1) {
+                Utf8 charSequence493;
+                Object oldString493 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(493);
+                if (oldString493 instanceof Utf8) {
+                    charSequence493 = (decoder).readString(((Utf8) oldString493));
+                } else {
+                    charSequence493 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, charSequence493);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F493': "+ unionIndex493));
+            }
+        }
+        int unionIndex494 = (decoder.readIndex());
+        if (unionIndex494 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, null);
+        } else {
+            if (unionIndex494 == 1) {
+                Utf8 charSequence494;
+                Object oldString494 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(494);
+                if (oldString494 instanceof Utf8) {
+                    charSequence494 = (decoder).readString(((Utf8) oldString494));
+                } else {
+                    charSequence494 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, charSequence494);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F494': "+ unionIndex494));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex495 = (decoder.readIndex());
+        if (unionIndex495 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, null);
+        } else {
+            if (unionIndex495 == 1) {
+                Utf8 charSequence495;
+                Object oldString495 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(495);
+                if (oldString495 instanceof Utf8) {
+                    charSequence495 = (decoder).readString(((Utf8) oldString495));
+                } else {
+                    charSequence495 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, charSequence495);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F495': "+ unionIndex495));
+            }
+        }
+        int unionIndex496 = (decoder.readIndex());
+        if (unionIndex496 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, null);
+        } else {
+            if (unionIndex496 == 1) {
+                Utf8 charSequence496;
+                Object oldString496 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(496);
+                if (oldString496 instanceof Utf8) {
+                    charSequence496 = (decoder).readString(((Utf8) oldString496));
+                } else {
+                    charSequence496 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, charSequence496);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F496': "+ unionIndex496));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex497 = (decoder.readIndex());
+        if (unionIndex497 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, null);
+        } else {
+            if (unionIndex497 == 1) {
+                Utf8 charSequence497;
+                Object oldString497 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(497);
+                if (oldString497 instanceof Utf8) {
+                    charSequence497 = (decoder).readString(((Utf8) oldString497));
+                } else {
+                    charSequence497 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, charSequence497);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F497': "+ unionIndex497));
+            }
+        }
+        int unionIndex498 = (decoder.readIndex());
+        if (unionIndex498 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, null);
+        } else {
+            if (unionIndex498 == 1) {
+                Utf8 charSequence498;
+                Object oldString498 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(498);
+                if (oldString498 instanceof Utf8) {
+                    charSequence498 = (decoder).readString(((Utf8) oldString498));
+                } else {
+                    charSequence498 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, charSequence498);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F498': "+ unionIndex498));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex499 = (decoder.readIndex());
+        if (unionIndex499 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, null);
+        } else {
+            if (unionIndex499 == 1) {
+                Utf8 charSequence499;
+                Object oldString499 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(499);
+                if (oldString499 instanceof Utf8) {
+                    charSequence499 = (decoder).readString(((Utf8) oldString499));
+                } else {
+                    charSequence499 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, charSequence499);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F499': "+ unionIndex499));
+            }
+        }
+        int unionIndex500 = (decoder.readIndex());
+        if (unionIndex500 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, null);
+        } else {
+            if (unionIndex500 == 1) {
+                Utf8 charSequence500;
+                Object oldString500 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(500);
+                if (oldString500 instanceof Utf8) {
+                    charSequence500 = (decoder).readString(((Utf8) oldString500));
+                } else {
+                    charSequence500 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, charSequence500);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F500': "+ unionIndex500));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex501 = (decoder.readIndex());
+        if (unionIndex501 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, null);
+        } else {
+            if (unionIndex501 == 1) {
+                Utf8 charSequence501;
+                Object oldString501 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(501);
+                if (oldString501 instanceof Utf8) {
+                    charSequence501 = (decoder).readString(((Utf8) oldString501));
+                } else {
+                    charSequence501 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, charSequence501);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F501': "+ unionIndex501));
+            }
+        }
+        int unionIndex502 = (decoder.readIndex());
+        if (unionIndex502 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, null);
+        } else {
+            if (unionIndex502 == 1) {
+                Utf8 charSequence502;
+                Object oldString502 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(502);
+                if (oldString502 instanceof Utf8) {
+                    charSequence502 = (decoder).readString(((Utf8) oldString502));
+                } else {
+                    charSequence502 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, charSequence502);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F502': "+ unionIndex502));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex503 = (decoder.readIndex());
+        if (unionIndex503 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, null);
+        } else {
+            if (unionIndex503 == 1) {
+                Utf8 charSequence503;
+                Object oldString503 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(503);
+                if (oldString503 instanceof Utf8) {
+                    charSequence503 = (decoder).readString(((Utf8) oldString503));
+                } else {
+                    charSequence503 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, charSequence503);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F503': "+ unionIndex503));
+            }
+        }
+        int unionIndex504 = (decoder.readIndex());
+        if (unionIndex504 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, null);
+        } else {
+            if (unionIndex504 == 1) {
+                Utf8 charSequence504;
+                Object oldString504 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(504);
+                if (oldString504 instanceof Utf8) {
+                    charSequence504 = (decoder).readString(((Utf8) oldString504));
+                } else {
+                    charSequence504 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, charSequence504);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F504': "+ unionIndex504));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex505 = (decoder.readIndex());
+        if (unionIndex505 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, null);
+        } else {
+            if (unionIndex505 == 1) {
+                Utf8 charSequence505;
+                Object oldString505 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(505);
+                if (oldString505 instanceof Utf8) {
+                    charSequence505 = (decoder).readString(((Utf8) oldString505));
+                } else {
+                    charSequence505 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, charSequence505);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F505': "+ unionIndex505));
+            }
+        }
+        int unionIndex506 = (decoder.readIndex());
+        if (unionIndex506 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, null);
+        } else {
+            if (unionIndex506 == 1) {
+                Utf8 charSequence506;
+                Object oldString506 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(506);
+                if (oldString506 instanceof Utf8) {
+                    charSequence506 = (decoder).readString(((Utf8) oldString506));
+                } else {
+                    charSequence506 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, charSequence506);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F506': "+ unionIndex506));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex507 = (decoder.readIndex());
+        if (unionIndex507 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, null);
+        } else {
+            if (unionIndex507 == 1) {
+                Utf8 charSequence507;
+                Object oldString507 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(507);
+                if (oldString507 instanceof Utf8) {
+                    charSequence507 = (decoder).readString(((Utf8) oldString507));
+                } else {
+                    charSequence507 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, charSequence507);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F507': "+ unionIndex507));
+            }
+        }
+        int unionIndex508 = (decoder.readIndex());
+        if (unionIndex508 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, null);
+        } else {
+            if (unionIndex508 == 1) {
+                Utf8 charSequence508;
+                Object oldString508 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(508);
+                if (oldString508 instanceof Utf8) {
+                    charSequence508 = (decoder).readString(((Utf8) oldString508));
+                } else {
+                    charSequence508 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, charSequence508);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F508': "+ unionIndex508));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex509 = (decoder.readIndex());
+        if (unionIndex509 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, null);
+        } else {
+            if (unionIndex509 == 1) {
+                Utf8 charSequence509;
+                Object oldString509 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(509);
+                if (oldString509 instanceof Utf8) {
+                    charSequence509 = (decoder).readString(((Utf8) oldString509));
+                } else {
+                    charSequence509 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, charSequence509);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F509': "+ unionIndex509));
+            }
+        }
+        int unionIndex510 = (decoder.readIndex());
+        if (unionIndex510 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, null);
+        } else {
+            if (unionIndex510 == 1) {
+                Utf8 charSequence510;
+                Object oldString510 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(510);
+                if (oldString510 instanceof Utf8) {
+                    charSequence510 = (decoder).readString(((Utf8) oldString510));
+                } else {
+                    charSequence510 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, charSequence510);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F510': "+ unionIndex510));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex511 = (decoder.readIndex());
+        if (unionIndex511 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, null);
+        } else {
+            if (unionIndex511 == 1) {
+                Utf8 charSequence511;
+                Object oldString511 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(511);
+                if (oldString511 instanceof Utf8) {
+                    charSequence511 = (decoder).readString(((Utf8) oldString511));
+                } else {
+                    charSequence511 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, charSequence511);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F511': "+ unionIndex511));
+            }
+        }
+        int unionIndex512 = (decoder.readIndex());
+        if (unionIndex512 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, null);
+        } else {
+            if (unionIndex512 == 1) {
+                Utf8 charSequence512;
+                Object oldString512 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(512);
+                if (oldString512 instanceof Utf8) {
+                    charSequence512 = (decoder).readString(((Utf8) oldString512));
+                } else {
+                    charSequence512 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, charSequence512);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F512': "+ unionIndex512));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex513 = (decoder.readIndex());
+        if (unionIndex513 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, null);
+        } else {
+            if (unionIndex513 == 1) {
+                Utf8 charSequence513;
+                Object oldString513 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(513);
+                if (oldString513 instanceof Utf8) {
+                    charSequence513 = (decoder).readString(((Utf8) oldString513));
+                } else {
+                    charSequence513 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, charSequence513);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F513': "+ unionIndex513));
+            }
+        }
+        int unionIndex514 = (decoder.readIndex());
+        if (unionIndex514 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, null);
+        } else {
+            if (unionIndex514 == 1) {
+                Utf8 charSequence514;
+                Object oldString514 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(514);
+                if (oldString514 instanceof Utf8) {
+                    charSequence514 = (decoder).readString(((Utf8) oldString514));
+                } else {
+                    charSequence514 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, charSequence514);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F514': "+ unionIndex514));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex515 = (decoder.readIndex());
+        if (unionIndex515 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, null);
+        } else {
+            if (unionIndex515 == 1) {
+                Utf8 charSequence515;
+                Object oldString515 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(515);
+                if (oldString515 instanceof Utf8) {
+                    charSequence515 = (decoder).readString(((Utf8) oldString515));
+                } else {
+                    charSequence515 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, charSequence515);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F515': "+ unionIndex515));
+            }
+        }
+        int unionIndex516 = (decoder.readIndex());
+        if (unionIndex516 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, null);
+        } else {
+            if (unionIndex516 == 1) {
+                Utf8 charSequence516;
+                Object oldString516 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(516);
+                if (oldString516 instanceof Utf8) {
+                    charSequence516 = (decoder).readString(((Utf8) oldString516));
+                } else {
+                    charSequence516 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, charSequence516);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F516': "+ unionIndex516));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex517 = (decoder.readIndex());
+        if (unionIndex517 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, null);
+        } else {
+            if (unionIndex517 == 1) {
+                Utf8 charSequence517;
+                Object oldString517 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(517);
+                if (oldString517 instanceof Utf8) {
+                    charSequence517 = (decoder).readString(((Utf8) oldString517));
+                } else {
+                    charSequence517 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, charSequence517);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F517': "+ unionIndex517));
+            }
+        }
+        int unionIndex518 = (decoder.readIndex());
+        if (unionIndex518 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, null);
+        } else {
+            if (unionIndex518 == 1) {
+                Utf8 charSequence518;
+                Object oldString518 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(518);
+                if (oldString518 instanceof Utf8) {
+                    charSequence518 = (decoder).readString(((Utf8) oldString518));
+                } else {
+                    charSequence518 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, charSequence518);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F518': "+ unionIndex518));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex519 = (decoder.readIndex());
+        if (unionIndex519 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, null);
+        } else {
+            if (unionIndex519 == 1) {
+                Utf8 charSequence519;
+                Object oldString519 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(519);
+                if (oldString519 instanceof Utf8) {
+                    charSequence519 = (decoder).readString(((Utf8) oldString519));
+                } else {
+                    charSequence519 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, charSequence519);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F519': "+ unionIndex519));
+            }
+        }
+        int unionIndex520 = (decoder.readIndex());
+        if (unionIndex520 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, null);
+        } else {
+            if (unionIndex520 == 1) {
+                Utf8 charSequence520;
+                Object oldString520 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(520);
+                if (oldString520 instanceof Utf8) {
+                    charSequence520 = (decoder).readString(((Utf8) oldString520));
+                } else {
+                    charSequence520 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, charSequence520);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F520': "+ unionIndex520));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex521 = (decoder.readIndex());
+        if (unionIndex521 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, null);
+        } else {
+            if (unionIndex521 == 1) {
+                Utf8 charSequence521;
+                Object oldString521 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(521);
+                if (oldString521 instanceof Utf8) {
+                    charSequence521 = (decoder).readString(((Utf8) oldString521));
+                } else {
+                    charSequence521 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, charSequence521);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F521': "+ unionIndex521));
+            }
+        }
+        int unionIndex522 = (decoder.readIndex());
+        if (unionIndex522 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, null);
+        } else {
+            if (unionIndex522 == 1) {
+                Utf8 charSequence522;
+                Object oldString522 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(522);
+                if (oldString522 instanceof Utf8) {
+                    charSequence522 = (decoder).readString(((Utf8) oldString522));
+                } else {
+                    charSequence522 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, charSequence522);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F522': "+ unionIndex522));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex523 = (decoder.readIndex());
+        if (unionIndex523 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, null);
+        } else {
+            if (unionIndex523 == 1) {
+                Utf8 charSequence523;
+                Object oldString523 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(523);
+                if (oldString523 instanceof Utf8) {
+                    charSequence523 = (decoder).readString(((Utf8) oldString523));
+                } else {
+                    charSequence523 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, charSequence523);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F523': "+ unionIndex523));
+            }
+        }
+        int unionIndex524 = (decoder.readIndex());
+        if (unionIndex524 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, null);
+        } else {
+            if (unionIndex524 == 1) {
+                Utf8 charSequence524;
+                Object oldString524 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(524);
+                if (oldString524 instanceof Utf8) {
+                    charSequence524 = (decoder).readString(((Utf8) oldString524));
+                } else {
+                    charSequence524 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, charSequence524);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F524': "+ unionIndex524));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex525 = (decoder.readIndex());
+        if (unionIndex525 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, null);
+        } else {
+            if (unionIndex525 == 1) {
+                Utf8 charSequence525;
+                Object oldString525 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(525);
+                if (oldString525 instanceof Utf8) {
+                    charSequence525 = (decoder).readString(((Utf8) oldString525));
+                } else {
+                    charSequence525 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, charSequence525);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F525': "+ unionIndex525));
+            }
+        }
+        int unionIndex526 = (decoder.readIndex());
+        if (unionIndex526 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, null);
+        } else {
+            if (unionIndex526 == 1) {
+                Utf8 charSequence526;
+                Object oldString526 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(526);
+                if (oldString526 instanceof Utf8) {
+                    charSequence526 = (decoder).readString(((Utf8) oldString526));
+                } else {
+                    charSequence526 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, charSequence526);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F526': "+ unionIndex526));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex527 = (decoder.readIndex());
+        if (unionIndex527 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, null);
+        } else {
+            if (unionIndex527 == 1) {
+                Utf8 charSequence527;
+                Object oldString527 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(527);
+                if (oldString527 instanceof Utf8) {
+                    charSequence527 = (decoder).readString(((Utf8) oldString527));
+                } else {
+                    charSequence527 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, charSequence527);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F527': "+ unionIndex527));
+            }
+        }
+        int unionIndex528 = (decoder.readIndex());
+        if (unionIndex528 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, null);
+        } else {
+            if (unionIndex528 == 1) {
+                Utf8 charSequence528;
+                Object oldString528 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(528);
+                if (oldString528 instanceof Utf8) {
+                    charSequence528 = (decoder).readString(((Utf8) oldString528));
+                } else {
+                    charSequence528 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, charSequence528);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F528': "+ unionIndex528));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex529 = (decoder.readIndex());
+        if (unionIndex529 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, null);
+        } else {
+            if (unionIndex529 == 1) {
+                Utf8 charSequence529;
+                Object oldString529 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(529);
+                if (oldString529 instanceof Utf8) {
+                    charSequence529 = (decoder).readString(((Utf8) oldString529));
+                } else {
+                    charSequence529 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, charSequence529);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F529': "+ unionIndex529));
+            }
+        }
+        int unionIndex530 = (decoder.readIndex());
+        if (unionIndex530 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, null);
+        } else {
+            if (unionIndex530 == 1) {
+                Utf8 charSequence530;
+                Object oldString530 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(530);
+                if (oldString530 instanceof Utf8) {
+                    charSequence530 = (decoder).readString(((Utf8) oldString530));
+                } else {
+                    charSequence530 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, charSequence530);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F530': "+ unionIndex530));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex531 = (decoder.readIndex());
+        if (unionIndex531 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, null);
+        } else {
+            if (unionIndex531 == 1) {
+                Utf8 charSequence531;
+                Object oldString531 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(531);
+                if (oldString531 instanceof Utf8) {
+                    charSequence531 = (decoder).readString(((Utf8) oldString531));
+                } else {
+                    charSequence531 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, charSequence531);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F531': "+ unionIndex531));
+            }
+        }
+        int unionIndex532 = (decoder.readIndex());
+        if (unionIndex532 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, null);
+        } else {
+            if (unionIndex532 == 1) {
+                Utf8 charSequence532;
+                Object oldString532 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(532);
+                if (oldString532 instanceof Utf8) {
+                    charSequence532 = (decoder).readString(((Utf8) oldString532));
+                } else {
+                    charSequence532 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, charSequence532);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F532': "+ unionIndex532));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex533 = (decoder.readIndex());
+        if (unionIndex533 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, null);
+        } else {
+            if (unionIndex533 == 1) {
+                Utf8 charSequence533;
+                Object oldString533 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(533);
+                if (oldString533 instanceof Utf8) {
+                    charSequence533 = (decoder).readString(((Utf8) oldString533));
+                } else {
+                    charSequence533 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, charSequence533);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F533': "+ unionIndex533));
+            }
+        }
+        int unionIndex534 = (decoder.readIndex());
+        if (unionIndex534 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, null);
+        } else {
+            if (unionIndex534 == 1) {
+                Utf8 charSequence534;
+                Object oldString534 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(534);
+                if (oldString534 instanceof Utf8) {
+                    charSequence534 = (decoder).readString(((Utf8) oldString534));
+                } else {
+                    charSequence534 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, charSequence534);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F534': "+ unionIndex534));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex535 = (decoder.readIndex());
+        if (unionIndex535 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, null);
+        } else {
+            if (unionIndex535 == 1) {
+                Utf8 charSequence535;
+                Object oldString535 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(535);
+                if (oldString535 instanceof Utf8) {
+                    charSequence535 = (decoder).readString(((Utf8) oldString535));
+                } else {
+                    charSequence535 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, charSequence535);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F535': "+ unionIndex535));
+            }
+        }
+        int unionIndex536 = (decoder.readIndex());
+        if (unionIndex536 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, null);
+        } else {
+            if (unionIndex536 == 1) {
+                Utf8 charSequence536;
+                Object oldString536 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(536);
+                if (oldString536 instanceof Utf8) {
+                    charSequence536 = (decoder).readString(((Utf8) oldString536));
+                } else {
+                    charSequence536 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, charSequence536);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F536': "+ unionIndex536));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex537 = (decoder.readIndex());
+        if (unionIndex537 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, null);
+        } else {
+            if (unionIndex537 == 1) {
+                Utf8 charSequence537;
+                Object oldString537 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(537);
+                if (oldString537 instanceof Utf8) {
+                    charSequence537 = (decoder).readString(((Utf8) oldString537));
+                } else {
+                    charSequence537 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, charSequence537);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F537': "+ unionIndex537));
+            }
+        }
+        int unionIndex538 = (decoder.readIndex());
+        if (unionIndex538 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, null);
+        } else {
+            if (unionIndex538 == 1) {
+                Utf8 charSequence538;
+                Object oldString538 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(538);
+                if (oldString538 instanceof Utf8) {
+                    charSequence538 = (decoder).readString(((Utf8) oldString538));
+                } else {
+                    charSequence538 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, charSequence538);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F538': "+ unionIndex538));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex539 = (decoder.readIndex());
+        if (unionIndex539 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, null);
+        } else {
+            if (unionIndex539 == 1) {
+                Utf8 charSequence539;
+                Object oldString539 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(539);
+                if (oldString539 instanceof Utf8) {
+                    charSequence539 = (decoder).readString(((Utf8) oldString539));
+                } else {
+                    charSequence539 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, charSequence539);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F539': "+ unionIndex539));
+            }
+        }
+        int unionIndex540 = (decoder.readIndex());
+        if (unionIndex540 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, null);
+        } else {
+            if (unionIndex540 == 1) {
+                Utf8 charSequence540;
+                Object oldString540 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(540);
+                if (oldString540 instanceof Utf8) {
+                    charSequence540 = (decoder).readString(((Utf8) oldString540));
+                } else {
+                    charSequence540 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, charSequence540);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F540': "+ unionIndex540));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex541 = (decoder.readIndex());
+        if (unionIndex541 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, null);
+        } else {
+            if (unionIndex541 == 1) {
+                Utf8 charSequence541;
+                Object oldString541 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(541);
+                if (oldString541 instanceof Utf8) {
+                    charSequence541 = (decoder).readString(((Utf8) oldString541));
+                } else {
+                    charSequence541 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, charSequence541);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F541': "+ unionIndex541));
+            }
+        }
+        int unionIndex542 = (decoder.readIndex());
+        if (unionIndex542 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, null);
+        } else {
+            if (unionIndex542 == 1) {
+                Utf8 charSequence542;
+                Object oldString542 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(542);
+                if (oldString542 instanceof Utf8) {
+                    charSequence542 = (decoder).readString(((Utf8) oldString542));
+                } else {
+                    charSequence542 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, charSequence542);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F542': "+ unionIndex542));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex543 = (decoder.readIndex());
+        if (unionIndex543 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, null);
+        } else {
+            if (unionIndex543 == 1) {
+                Utf8 charSequence543;
+                Object oldString543 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(543);
+                if (oldString543 instanceof Utf8) {
+                    charSequence543 = (decoder).readString(((Utf8) oldString543));
+                } else {
+                    charSequence543 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, charSequence543);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F543': "+ unionIndex543));
+            }
+        }
+        int unionIndex544 = (decoder.readIndex());
+        if (unionIndex544 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, null);
+        } else {
+            if (unionIndex544 == 1) {
+                Utf8 charSequence544;
+                Object oldString544 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(544);
+                if (oldString544 instanceof Utf8) {
+                    charSequence544 = (decoder).readString(((Utf8) oldString544));
+                } else {
+                    charSequence544 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, charSequence544);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F544': "+ unionIndex544));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex545 = (decoder.readIndex());
+        if (unionIndex545 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, null);
+        } else {
+            if (unionIndex545 == 1) {
+                Utf8 charSequence545;
+                Object oldString545 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(545);
+                if (oldString545 instanceof Utf8) {
+                    charSequence545 = (decoder).readString(((Utf8) oldString545));
+                } else {
+                    charSequence545 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, charSequence545);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F545': "+ unionIndex545));
+            }
+        }
+        int unionIndex546 = (decoder.readIndex());
+        if (unionIndex546 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, null);
+        } else {
+            if (unionIndex546 == 1) {
+                Utf8 charSequence546;
+                Object oldString546 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(546);
+                if (oldString546 instanceof Utf8) {
+                    charSequence546 = (decoder).readString(((Utf8) oldString546));
+                } else {
+                    charSequence546 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, charSequence546);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F546': "+ unionIndex546));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex547 = (decoder.readIndex());
+        if (unionIndex547 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, null);
+        } else {
+            if (unionIndex547 == 1) {
+                Utf8 charSequence547;
+                Object oldString547 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(547);
+                if (oldString547 instanceof Utf8) {
+                    charSequence547 = (decoder).readString(((Utf8) oldString547));
+                } else {
+                    charSequence547 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, charSequence547);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F547': "+ unionIndex547));
+            }
+        }
+        int unionIndex548 = (decoder.readIndex());
+        if (unionIndex548 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, null);
+        } else {
+            if (unionIndex548 == 1) {
+                Utf8 charSequence548;
+                Object oldString548 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(548);
+                if (oldString548 instanceof Utf8) {
+                    charSequence548 = (decoder).readString(((Utf8) oldString548));
+                } else {
+                    charSequence548 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, charSequence548);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F548': "+ unionIndex548));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex549 = (decoder.readIndex());
+        if (unionIndex549 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, null);
+        } else {
+            if (unionIndex549 == 1) {
+                Utf8 charSequence549;
+                Object oldString549 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(549);
+                if (oldString549 instanceof Utf8) {
+                    charSequence549 = (decoder).readString(((Utf8) oldString549));
+                } else {
+                    charSequence549 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, charSequence549);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F549': "+ unionIndex549));
+            }
+        }
+        int unionIndex550 = (decoder.readIndex());
+        if (unionIndex550 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, null);
+        } else {
+            if (unionIndex550 == 1) {
+                Utf8 charSequence550;
+                Object oldString550 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(550);
+                if (oldString550 instanceof Utf8) {
+                    charSequence550 = (decoder).readString(((Utf8) oldString550));
+                } else {
+                    charSequence550 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, charSequence550);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F550': "+ unionIndex550));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex551 = (decoder.readIndex());
+        if (unionIndex551 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, null);
+        } else {
+            if (unionIndex551 == 1) {
+                Utf8 charSequence551;
+                Object oldString551 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(551);
+                if (oldString551 instanceof Utf8) {
+                    charSequence551 = (decoder).readString(((Utf8) oldString551));
+                } else {
+                    charSequence551 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, charSequence551);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F551': "+ unionIndex551));
+            }
+        }
+        int unionIndex552 = (decoder.readIndex());
+        if (unionIndex552 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, null);
+        } else {
+            if (unionIndex552 == 1) {
+                Utf8 charSequence552;
+                Object oldString552 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(552);
+                if (oldString552 instanceof Utf8) {
+                    charSequence552 = (decoder).readString(((Utf8) oldString552));
+                } else {
+                    charSequence552 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, charSequence552);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F552': "+ unionIndex552));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex553 = (decoder.readIndex());
+        if (unionIndex553 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, null);
+        } else {
+            if (unionIndex553 == 1) {
+                Utf8 charSequence553;
+                Object oldString553 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(553);
+                if (oldString553 instanceof Utf8) {
+                    charSequence553 = (decoder).readString(((Utf8) oldString553));
+                } else {
+                    charSequence553 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, charSequence553);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F553': "+ unionIndex553));
+            }
+        }
+        int unionIndex554 = (decoder.readIndex());
+        if (unionIndex554 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, null);
+        } else {
+            if (unionIndex554 == 1) {
+                Utf8 charSequence554;
+                Object oldString554 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(554);
+                if (oldString554 instanceof Utf8) {
+                    charSequence554 = (decoder).readString(((Utf8) oldString554));
+                } else {
+                    charSequence554 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, charSequence554);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F554': "+ unionIndex554));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex555 = (decoder.readIndex());
+        if (unionIndex555 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, null);
+        } else {
+            if (unionIndex555 == 1) {
+                Utf8 charSequence555;
+                Object oldString555 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(555);
+                if (oldString555 instanceof Utf8) {
+                    charSequence555 = (decoder).readString(((Utf8) oldString555));
+                } else {
+                    charSequence555 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, charSequence555);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F555': "+ unionIndex555));
+            }
+        }
+        int unionIndex556 = (decoder.readIndex());
+        if (unionIndex556 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, null);
+        } else {
+            if (unionIndex556 == 1) {
+                Utf8 charSequence556;
+                Object oldString556 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(556);
+                if (oldString556 instanceof Utf8) {
+                    charSequence556 = (decoder).readString(((Utf8) oldString556));
+                } else {
+                    charSequence556 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, charSequence556);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F556': "+ unionIndex556));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex557 = (decoder.readIndex());
+        if (unionIndex557 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, null);
+        } else {
+            if (unionIndex557 == 1) {
+                Utf8 charSequence557;
+                Object oldString557 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(557);
+                if (oldString557 instanceof Utf8) {
+                    charSequence557 = (decoder).readString(((Utf8) oldString557));
+                } else {
+                    charSequence557 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, charSequence557);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F557': "+ unionIndex557));
+            }
+        }
+        int unionIndex558 = (decoder.readIndex());
+        if (unionIndex558 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, null);
+        } else {
+            if (unionIndex558 == 1) {
+                Utf8 charSequence558;
+                Object oldString558 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(558);
+                if (oldString558 instanceof Utf8) {
+                    charSequence558 = (decoder).readString(((Utf8) oldString558));
+                } else {
+                    charSequence558 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, charSequence558);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F558': "+ unionIndex558));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex559 = (decoder.readIndex());
+        if (unionIndex559 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, null);
+        } else {
+            if (unionIndex559 == 1) {
+                Utf8 charSequence559;
+                Object oldString559 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(559);
+                if (oldString559 instanceof Utf8) {
+                    charSequence559 = (decoder).readString(((Utf8) oldString559));
+                } else {
+                    charSequence559 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, charSequence559);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F559': "+ unionIndex559));
+            }
+        }
+        int unionIndex560 = (decoder.readIndex());
+        if (unionIndex560 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, null);
+        } else {
+            if (unionIndex560 == 1) {
+                Utf8 charSequence560;
+                Object oldString560 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(560);
+                if (oldString560 instanceof Utf8) {
+                    charSequence560 = (decoder).readString(((Utf8) oldString560));
+                } else {
+                    charSequence560 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, charSequence560);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F560': "+ unionIndex560));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex561 = (decoder.readIndex());
+        if (unionIndex561 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, null);
+        } else {
+            if (unionIndex561 == 1) {
+                Utf8 charSequence561;
+                Object oldString561 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(561);
+                if (oldString561 instanceof Utf8) {
+                    charSequence561 = (decoder).readString(((Utf8) oldString561));
+                } else {
+                    charSequence561 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, charSequence561);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F561': "+ unionIndex561));
+            }
+        }
+        int unionIndex562 = (decoder.readIndex());
+        if (unionIndex562 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, null);
+        } else {
+            if (unionIndex562 == 1) {
+                Utf8 charSequence562;
+                Object oldString562 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(562);
+                if (oldString562 instanceof Utf8) {
+                    charSequence562 = (decoder).readString(((Utf8) oldString562));
+                } else {
+                    charSequence562 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, charSequence562);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F562': "+ unionIndex562));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex563 = (decoder.readIndex());
+        if (unionIndex563 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, null);
+        } else {
+            if (unionIndex563 == 1) {
+                Utf8 charSequence563;
+                Object oldString563 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(563);
+                if (oldString563 instanceof Utf8) {
+                    charSequence563 = (decoder).readString(((Utf8) oldString563));
+                } else {
+                    charSequence563 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, charSequence563);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F563': "+ unionIndex563));
+            }
+        }
+        int unionIndex564 = (decoder.readIndex());
+        if (unionIndex564 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, null);
+        } else {
+            if (unionIndex564 == 1) {
+                Utf8 charSequence564;
+                Object oldString564 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(564);
+                if (oldString564 instanceof Utf8) {
+                    charSequence564 = (decoder).readString(((Utf8) oldString564));
+                } else {
+                    charSequence564 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, charSequence564);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F564': "+ unionIndex564));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex565 = (decoder.readIndex());
+        if (unionIndex565 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, null);
+        } else {
+            if (unionIndex565 == 1) {
+                Utf8 charSequence565;
+                Object oldString565 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(565);
+                if (oldString565 instanceof Utf8) {
+                    charSequence565 = (decoder).readString(((Utf8) oldString565));
+                } else {
+                    charSequence565 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, charSequence565);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F565': "+ unionIndex565));
+            }
+        }
+        int unionIndex566 = (decoder.readIndex());
+        if (unionIndex566 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, null);
+        } else {
+            if (unionIndex566 == 1) {
+                Utf8 charSequence566;
+                Object oldString566 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(566);
+                if (oldString566 instanceof Utf8) {
+                    charSequence566 = (decoder).readString(((Utf8) oldString566));
+                } else {
+                    charSequence566 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, charSequence566);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F566': "+ unionIndex566));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex567 = (decoder.readIndex());
+        if (unionIndex567 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, null);
+        } else {
+            if (unionIndex567 == 1) {
+                Utf8 charSequence567;
+                Object oldString567 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(567);
+                if (oldString567 instanceof Utf8) {
+                    charSequence567 = (decoder).readString(((Utf8) oldString567));
+                } else {
+                    charSequence567 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, charSequence567);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F567': "+ unionIndex567));
+            }
+        }
+        int unionIndex568 = (decoder.readIndex());
+        if (unionIndex568 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, null);
+        } else {
+            if (unionIndex568 == 1) {
+                Utf8 charSequence568;
+                Object oldString568 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(568);
+                if (oldString568 instanceof Utf8) {
+                    charSequence568 = (decoder).readString(((Utf8) oldString568));
+                } else {
+                    charSequence568 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, charSequence568);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F568': "+ unionIndex568));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex569 = (decoder.readIndex());
+        if (unionIndex569 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, null);
+        } else {
+            if (unionIndex569 == 1) {
+                Utf8 charSequence569;
+                Object oldString569 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(569);
+                if (oldString569 instanceof Utf8) {
+                    charSequence569 = (decoder).readString(((Utf8) oldString569));
+                } else {
+                    charSequence569 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, charSequence569);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F569': "+ unionIndex569));
+            }
+        }
+        int unionIndex570 = (decoder.readIndex());
+        if (unionIndex570 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, null);
+        } else {
+            if (unionIndex570 == 1) {
+                Utf8 charSequence570;
+                Object oldString570 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(570);
+                if (oldString570 instanceof Utf8) {
+                    charSequence570 = (decoder).readString(((Utf8) oldString570));
+                } else {
+                    charSequence570 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, charSequence570);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F570': "+ unionIndex570));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex571 = (decoder.readIndex());
+        if (unionIndex571 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, null);
+        } else {
+            if (unionIndex571 == 1) {
+                Utf8 charSequence571;
+                Object oldString571 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(571);
+                if (oldString571 instanceof Utf8) {
+                    charSequence571 = (decoder).readString(((Utf8) oldString571));
+                } else {
+                    charSequence571 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, charSequence571);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F571': "+ unionIndex571));
+            }
+        }
+        int unionIndex572 = (decoder.readIndex());
+        if (unionIndex572 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, null);
+        } else {
+            if (unionIndex572 == 1) {
+                Utf8 charSequence572;
+                Object oldString572 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(572);
+                if (oldString572 instanceof Utf8) {
+                    charSequence572 = (decoder).readString(((Utf8) oldString572));
+                } else {
+                    charSequence572 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, charSequence572);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F572': "+ unionIndex572));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex573 = (decoder.readIndex());
+        if (unionIndex573 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, null);
+        } else {
+            if (unionIndex573 == 1) {
+                Utf8 charSequence573;
+                Object oldString573 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(573);
+                if (oldString573 instanceof Utf8) {
+                    charSequence573 = (decoder).readString(((Utf8) oldString573));
+                } else {
+                    charSequence573 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, charSequence573);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F573': "+ unionIndex573));
+            }
+        }
+        int unionIndex574 = (decoder.readIndex());
+        if (unionIndex574 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, null);
+        } else {
+            if (unionIndex574 == 1) {
+                Utf8 charSequence574;
+                Object oldString574 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(574);
+                if (oldString574 instanceof Utf8) {
+                    charSequence574 = (decoder).readString(((Utf8) oldString574));
+                } else {
+                    charSequence574 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, charSequence574);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F574': "+ unionIndex574));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex575 = (decoder.readIndex());
+        if (unionIndex575 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, null);
+        } else {
+            if (unionIndex575 == 1) {
+                Utf8 charSequence575;
+                Object oldString575 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(575);
+                if (oldString575 instanceof Utf8) {
+                    charSequence575 = (decoder).readString(((Utf8) oldString575));
+                } else {
+                    charSequence575 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, charSequence575);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F575': "+ unionIndex575));
+            }
+        }
+        int unionIndex576 = (decoder.readIndex());
+        if (unionIndex576 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, null);
+        } else {
+            if (unionIndex576 == 1) {
+                Utf8 charSequence576;
+                Object oldString576 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(576);
+                if (oldString576 instanceof Utf8) {
+                    charSequence576 = (decoder).readString(((Utf8) oldString576));
+                } else {
+                    charSequence576 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, charSequence576);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F576': "+ unionIndex576));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex577 = (decoder.readIndex());
+        if (unionIndex577 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, null);
+        } else {
+            if (unionIndex577 == 1) {
+                Utf8 charSequence577;
+                Object oldString577 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(577);
+                if (oldString577 instanceof Utf8) {
+                    charSequence577 = (decoder).readString(((Utf8) oldString577));
+                } else {
+                    charSequence577 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, charSequence577);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F577': "+ unionIndex577));
+            }
+        }
+        int unionIndex578 = (decoder.readIndex());
+        if (unionIndex578 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, null);
+        } else {
+            if (unionIndex578 == 1) {
+                Utf8 charSequence578;
+                Object oldString578 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(578);
+                if (oldString578 instanceof Utf8) {
+                    charSequence578 = (decoder).readString(((Utf8) oldString578));
+                } else {
+                    charSequence578 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, charSequence578);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F578': "+ unionIndex578));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex579 = (decoder.readIndex());
+        if (unionIndex579 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, null);
+        } else {
+            if (unionIndex579 == 1) {
+                Utf8 charSequence579;
+                Object oldString579 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(579);
+                if (oldString579 instanceof Utf8) {
+                    charSequence579 = (decoder).readString(((Utf8) oldString579));
+                } else {
+                    charSequence579 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, charSequence579);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F579': "+ unionIndex579));
+            }
+        }
+        int unionIndex580 = (decoder.readIndex());
+        if (unionIndex580 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, null);
+        } else {
+            if (unionIndex580 == 1) {
+                Utf8 charSequence580;
+                Object oldString580 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(580);
+                if (oldString580 instanceof Utf8) {
+                    charSequence580 = (decoder).readString(((Utf8) oldString580));
+                } else {
+                    charSequence580 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, charSequence580);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F580': "+ unionIndex580));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex581 = (decoder.readIndex());
+        if (unionIndex581 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, null);
+        } else {
+            if (unionIndex581 == 1) {
+                Utf8 charSequence581;
+                Object oldString581 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(581);
+                if (oldString581 instanceof Utf8) {
+                    charSequence581 = (decoder).readString(((Utf8) oldString581));
+                } else {
+                    charSequence581 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, charSequence581);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F581': "+ unionIndex581));
+            }
+        }
+        int unionIndex582 = (decoder.readIndex());
+        if (unionIndex582 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, null);
+        } else {
+            if (unionIndex582 == 1) {
+                Utf8 charSequence582;
+                Object oldString582 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(582);
+                if (oldString582 instanceof Utf8) {
+                    charSequence582 = (decoder).readString(((Utf8) oldString582));
+                } else {
+                    charSequence582 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, charSequence582);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F582': "+ unionIndex582));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex583 = (decoder.readIndex());
+        if (unionIndex583 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, null);
+        } else {
+            if (unionIndex583 == 1) {
+                Utf8 charSequence583;
+                Object oldString583 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(583);
+                if (oldString583 instanceof Utf8) {
+                    charSequence583 = (decoder).readString(((Utf8) oldString583));
+                } else {
+                    charSequence583 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, charSequence583);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F583': "+ unionIndex583));
+            }
+        }
+        int unionIndex584 = (decoder.readIndex());
+        if (unionIndex584 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, null);
+        } else {
+            if (unionIndex584 == 1) {
+                Utf8 charSequence584;
+                Object oldString584 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(584);
+                if (oldString584 instanceof Utf8) {
+                    charSequence584 = (decoder).readString(((Utf8) oldString584));
+                } else {
+                    charSequence584 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, charSequence584);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F584': "+ unionIndex584));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex585 = (decoder.readIndex());
+        if (unionIndex585 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, null);
+        } else {
+            if (unionIndex585 == 1) {
+                Utf8 charSequence585;
+                Object oldString585 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(585);
+                if (oldString585 instanceof Utf8) {
+                    charSequence585 = (decoder).readString(((Utf8) oldString585));
+                } else {
+                    charSequence585 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, charSequence585);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F585': "+ unionIndex585));
+            }
+        }
+        int unionIndex586 = (decoder.readIndex());
+        if (unionIndex586 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, null);
+        } else {
+            if (unionIndex586 == 1) {
+                Utf8 charSequence586;
+                Object oldString586 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(586);
+                if (oldString586 instanceof Utf8) {
+                    charSequence586 = (decoder).readString(((Utf8) oldString586));
+                } else {
+                    charSequence586 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, charSequence586);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F586': "+ unionIndex586));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex587 = (decoder.readIndex());
+        if (unionIndex587 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, null);
+        } else {
+            if (unionIndex587 == 1) {
+                Utf8 charSequence587;
+                Object oldString587 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(587);
+                if (oldString587 instanceof Utf8) {
+                    charSequence587 = (decoder).readString(((Utf8) oldString587));
+                } else {
+                    charSequence587 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, charSequence587);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F587': "+ unionIndex587));
+            }
+        }
+        int unionIndex588 = (decoder.readIndex());
+        if (unionIndex588 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, null);
+        } else {
+            if (unionIndex588 == 1) {
+                Utf8 charSequence588;
+                Object oldString588 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(588);
+                if (oldString588 instanceof Utf8) {
+                    charSequence588 = (decoder).readString(((Utf8) oldString588));
+                } else {
+                    charSequence588 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, charSequence588);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F588': "+ unionIndex588));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex589 = (decoder.readIndex());
+        if (unionIndex589 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, null);
+        } else {
+            if (unionIndex589 == 1) {
+                Utf8 charSequence589;
+                Object oldString589 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(589);
+                if (oldString589 instanceof Utf8) {
+                    charSequence589 = (decoder).readString(((Utf8) oldString589));
+                } else {
+                    charSequence589 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, charSequence589);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F589': "+ unionIndex589));
+            }
+        }
+        int unionIndex590 = (decoder.readIndex());
+        if (unionIndex590 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, null);
+        } else {
+            if (unionIndex590 == 1) {
+                Utf8 charSequence590;
+                Object oldString590 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(590);
+                if (oldString590 instanceof Utf8) {
+                    charSequence590 = (decoder).readString(((Utf8) oldString590));
+                } else {
+                    charSequence590 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, charSequence590);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F590': "+ unionIndex590));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex591 = (decoder.readIndex());
+        if (unionIndex591 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, null);
+        } else {
+            if (unionIndex591 == 1) {
+                Utf8 charSequence591;
+                Object oldString591 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(591);
+                if (oldString591 instanceof Utf8) {
+                    charSequence591 = (decoder).readString(((Utf8) oldString591));
+                } else {
+                    charSequence591 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, charSequence591);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F591': "+ unionIndex591));
+            }
+        }
+        int unionIndex592 = (decoder.readIndex());
+        if (unionIndex592 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, null);
+        } else {
+            if (unionIndex592 == 1) {
+                Utf8 charSequence592;
+                Object oldString592 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(592);
+                if (oldString592 instanceof Utf8) {
+                    charSequence592 = (decoder).readString(((Utf8) oldString592));
+                } else {
+                    charSequence592 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, charSequence592);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F592': "+ unionIndex592));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex593 = (decoder.readIndex());
+        if (unionIndex593 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, null);
+        } else {
+            if (unionIndex593 == 1) {
+                Utf8 charSequence593;
+                Object oldString593 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(593);
+                if (oldString593 instanceof Utf8) {
+                    charSequence593 = (decoder).readString(((Utf8) oldString593));
+                } else {
+                    charSequence593 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, charSequence593);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F593': "+ unionIndex593));
+            }
+        }
+        int unionIndex594 = (decoder.readIndex());
+        if (unionIndex594 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, null);
+        } else {
+            if (unionIndex594 == 1) {
+                Utf8 charSequence594;
+                Object oldString594 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(594);
+                if (oldString594 instanceof Utf8) {
+                    charSequence594 = (decoder).readString(((Utf8) oldString594));
+                } else {
+                    charSequence594 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, charSequence594);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F594': "+ unionIndex594));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex595 = (decoder.readIndex());
+        if (unionIndex595 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, null);
+        } else {
+            if (unionIndex595 == 1) {
+                Utf8 charSequence595;
+                Object oldString595 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(595);
+                if (oldString595 instanceof Utf8) {
+                    charSequence595 = (decoder).readString(((Utf8) oldString595));
+                } else {
+                    charSequence595 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, charSequence595);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F595': "+ unionIndex595));
+            }
+        }
+        int unionIndex596 = (decoder.readIndex());
+        if (unionIndex596 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, null);
+        } else {
+            if (unionIndex596 == 1) {
+                Utf8 charSequence596;
+                Object oldString596 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(596);
+                if (oldString596 instanceof Utf8) {
+                    charSequence596 = (decoder).readString(((Utf8) oldString596));
+                } else {
+                    charSequence596 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, charSequence596);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F596': "+ unionIndex596));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex597 = (decoder.readIndex());
+        if (unionIndex597 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, null);
+        } else {
+            if (unionIndex597 == 1) {
+                Utf8 charSequence597;
+                Object oldString597 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(597);
+                if (oldString597 instanceof Utf8) {
+                    charSequence597 = (decoder).readString(((Utf8) oldString597));
+                } else {
+                    charSequence597 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, charSequence597);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F597': "+ unionIndex597));
+            }
+        }
+        int unionIndex598 = (decoder.readIndex());
+        if (unionIndex598 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, null);
+        } else {
+            if (unionIndex598 == 1) {
+                Utf8 charSequence598;
+                Object oldString598 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(598);
+                if (oldString598 instanceof Utf8) {
+                    charSequence598 = (decoder).readString(((Utf8) oldString598));
+                } else {
+                    charSequence598 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, charSequence598);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F598': "+ unionIndex598));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex599 = (decoder.readIndex());
+        if (unionIndex599 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, null);
+        } else {
+            if (unionIndex599 == 1) {
+                Utf8 charSequence599;
+                Object oldString599 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(599);
+                if (oldString599 instanceof Utf8) {
+                    charSequence599 = (decoder).readString(((Utf8) oldString599));
+                } else {
+                    charSequence599 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, charSequence599);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F599': "+ unionIndex599));
+            }
+        }
+        int unionIndex600 = (decoder.readIndex());
+        if (unionIndex600 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, null);
+        } else {
+            if (unionIndex600 == 1) {
+                Utf8 charSequence600;
+                Object oldString600 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(600);
+                if (oldString600 instanceof Utf8) {
+                    charSequence600 = (decoder).readString(((Utf8) oldString600));
+                } else {
+                    charSequence600 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, charSequence600);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F600': "+ unionIndex600));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex601 = (decoder.readIndex());
+        if (unionIndex601 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, null);
+        } else {
+            if (unionIndex601 == 1) {
+                Utf8 charSequence601;
+                Object oldString601 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(601);
+                if (oldString601 instanceof Utf8) {
+                    charSequence601 = (decoder).readString(((Utf8) oldString601));
+                } else {
+                    charSequence601 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, charSequence601);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F601': "+ unionIndex601));
+            }
+        }
+        int unionIndex602 = (decoder.readIndex());
+        if (unionIndex602 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, null);
+        } else {
+            if (unionIndex602 == 1) {
+                Utf8 charSequence602;
+                Object oldString602 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(602);
+                if (oldString602 instanceof Utf8) {
+                    charSequence602 = (decoder).readString(((Utf8) oldString602));
+                } else {
+                    charSequence602 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, charSequence602);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F602': "+ unionIndex602));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex603 = (decoder.readIndex());
+        if (unionIndex603 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, null);
+        } else {
+            if (unionIndex603 == 1) {
+                Utf8 charSequence603;
+                Object oldString603 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(603);
+                if (oldString603 instanceof Utf8) {
+                    charSequence603 = (decoder).readString(((Utf8) oldString603));
+                } else {
+                    charSequence603 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, charSequence603);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F603': "+ unionIndex603));
+            }
+        }
+        int unionIndex604 = (decoder.readIndex());
+        if (unionIndex604 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, null);
+        } else {
+            if (unionIndex604 == 1) {
+                Utf8 charSequence604;
+                Object oldString604 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(604);
+                if (oldString604 instanceof Utf8) {
+                    charSequence604 = (decoder).readString(((Utf8) oldString604));
+                } else {
+                    charSequence604 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, charSequence604);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F604': "+ unionIndex604));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex605 = (decoder.readIndex());
+        if (unionIndex605 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, null);
+        } else {
+            if (unionIndex605 == 1) {
+                Utf8 charSequence605;
+                Object oldString605 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(605);
+                if (oldString605 instanceof Utf8) {
+                    charSequence605 = (decoder).readString(((Utf8) oldString605));
+                } else {
+                    charSequence605 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, charSequence605);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F605': "+ unionIndex605));
+            }
+        }
+        int unionIndex606 = (decoder.readIndex());
+        if (unionIndex606 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, null);
+        } else {
+            if (unionIndex606 == 1) {
+                Utf8 charSequence606;
+                Object oldString606 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(606);
+                if (oldString606 instanceof Utf8) {
+                    charSequence606 = (decoder).readString(((Utf8) oldString606));
+                } else {
+                    charSequence606 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, charSequence606);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F606': "+ unionIndex606));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex607 = (decoder.readIndex());
+        if (unionIndex607 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, null);
+        } else {
+            if (unionIndex607 == 1) {
+                Utf8 charSequence607;
+                Object oldString607 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(607);
+                if (oldString607 instanceof Utf8) {
+                    charSequence607 = (decoder).readString(((Utf8) oldString607));
+                } else {
+                    charSequence607 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, charSequence607);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F607': "+ unionIndex607));
+            }
+        }
+        int unionIndex608 = (decoder.readIndex());
+        if (unionIndex608 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, null);
+        } else {
+            if (unionIndex608 == 1) {
+                Utf8 charSequence608;
+                Object oldString608 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(608);
+                if (oldString608 instanceof Utf8) {
+                    charSequence608 = (decoder).readString(((Utf8) oldString608));
+                } else {
+                    charSequence608 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, charSequence608);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F608': "+ unionIndex608));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex609 = (decoder.readIndex());
+        if (unionIndex609 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, null);
+        } else {
+            if (unionIndex609 == 1) {
+                Utf8 charSequence609;
+                Object oldString609 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(609);
+                if (oldString609 instanceof Utf8) {
+                    charSequence609 = (decoder).readString(((Utf8) oldString609));
+                } else {
+                    charSequence609 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, charSequence609);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F609': "+ unionIndex609));
+            }
+        }
+        int unionIndex610 = (decoder.readIndex());
+        if (unionIndex610 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, null);
+        } else {
+            if (unionIndex610 == 1) {
+                Utf8 charSequence610;
+                Object oldString610 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(610);
+                if (oldString610 instanceof Utf8) {
+                    charSequence610 = (decoder).readString(((Utf8) oldString610));
+                } else {
+                    charSequence610 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, charSequence610);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F610': "+ unionIndex610));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex611 = (decoder.readIndex());
+        if (unionIndex611 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, null);
+        } else {
+            if (unionIndex611 == 1) {
+                Utf8 charSequence611;
+                Object oldString611 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(611);
+                if (oldString611 instanceof Utf8) {
+                    charSequence611 = (decoder).readString(((Utf8) oldString611));
+                } else {
+                    charSequence611 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, charSequence611);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F611': "+ unionIndex611));
+            }
+        }
+        int unionIndex612 = (decoder.readIndex());
+        if (unionIndex612 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, null);
+        } else {
+            if (unionIndex612 == 1) {
+                Utf8 charSequence612;
+                Object oldString612 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(612);
+                if (oldString612 instanceof Utf8) {
+                    charSequence612 = (decoder).readString(((Utf8) oldString612));
+                } else {
+                    charSequence612 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, charSequence612);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F612': "+ unionIndex612));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex613 = (decoder.readIndex());
+        if (unionIndex613 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, null);
+        } else {
+            if (unionIndex613 == 1) {
+                Utf8 charSequence613;
+                Object oldString613 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(613);
+                if (oldString613 instanceof Utf8) {
+                    charSequence613 = (decoder).readString(((Utf8) oldString613));
+                } else {
+                    charSequence613 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, charSequence613);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F613': "+ unionIndex613));
+            }
+        }
+        int unionIndex614 = (decoder.readIndex());
+        if (unionIndex614 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, null);
+        } else {
+            if (unionIndex614 == 1) {
+                Utf8 charSequence614;
+                Object oldString614 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(614);
+                if (oldString614 instanceof Utf8) {
+                    charSequence614 = (decoder).readString(((Utf8) oldString614));
+                } else {
+                    charSequence614 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, charSequence614);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F614': "+ unionIndex614));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex615 = (decoder.readIndex());
+        if (unionIndex615 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, null);
+        } else {
+            if (unionIndex615 == 1) {
+                Utf8 charSequence615;
+                Object oldString615 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(615);
+                if (oldString615 instanceof Utf8) {
+                    charSequence615 = (decoder).readString(((Utf8) oldString615));
+                } else {
+                    charSequence615 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, charSequence615);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F615': "+ unionIndex615));
+            }
+        }
+        int unionIndex616 = (decoder.readIndex());
+        if (unionIndex616 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, null);
+        } else {
+            if (unionIndex616 == 1) {
+                Utf8 charSequence616;
+                Object oldString616 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(616);
+                if (oldString616 instanceof Utf8) {
+                    charSequence616 = (decoder).readString(((Utf8) oldString616));
+                } else {
+                    charSequence616 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, charSequence616);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F616': "+ unionIndex616));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex617 = (decoder.readIndex());
+        if (unionIndex617 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, null);
+        } else {
+            if (unionIndex617 == 1) {
+                Utf8 charSequence617;
+                Object oldString617 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(617);
+                if (oldString617 instanceof Utf8) {
+                    charSequence617 = (decoder).readString(((Utf8) oldString617));
+                } else {
+                    charSequence617 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, charSequence617);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F617': "+ unionIndex617));
+            }
+        }
+        int unionIndex618 = (decoder.readIndex());
+        if (unionIndex618 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, null);
+        } else {
+            if (unionIndex618 == 1) {
+                Utf8 charSequence618;
+                Object oldString618 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(618);
+                if (oldString618 instanceof Utf8) {
+                    charSequence618 = (decoder).readString(((Utf8) oldString618));
+                } else {
+                    charSequence618 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, charSequence618);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F618': "+ unionIndex618));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex619 = (decoder.readIndex());
+        if (unionIndex619 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, null);
+        } else {
+            if (unionIndex619 == 1) {
+                Utf8 charSequence619;
+                Object oldString619 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(619);
+                if (oldString619 instanceof Utf8) {
+                    charSequence619 = (decoder).readString(((Utf8) oldString619));
+                } else {
+                    charSequence619 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, charSequence619);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F619': "+ unionIndex619));
+            }
+        }
+        int unionIndex620 = (decoder.readIndex());
+        if (unionIndex620 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, null);
+        } else {
+            if (unionIndex620 == 1) {
+                Utf8 charSequence620;
+                Object oldString620 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(620);
+                if (oldString620 instanceof Utf8) {
+                    charSequence620 = (decoder).readString(((Utf8) oldString620));
+                } else {
+                    charSequence620 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, charSequence620);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F620': "+ unionIndex620));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex621 = (decoder.readIndex());
+        if (unionIndex621 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, null);
+        } else {
+            if (unionIndex621 == 1) {
+                Utf8 charSequence621;
+                Object oldString621 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(621);
+                if (oldString621 instanceof Utf8) {
+                    charSequence621 = (decoder).readString(((Utf8) oldString621));
+                } else {
+                    charSequence621 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, charSequence621);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F621': "+ unionIndex621));
+            }
+        }
+        int unionIndex622 = (decoder.readIndex());
+        if (unionIndex622 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, null);
+        } else {
+            if (unionIndex622 == 1) {
+                Utf8 charSequence622;
+                Object oldString622 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(622);
+                if (oldString622 instanceof Utf8) {
+                    charSequence622 = (decoder).readString(((Utf8) oldString622));
+                } else {
+                    charSequence622 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, charSequence622);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F622': "+ unionIndex622));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex623 = (decoder.readIndex());
+        if (unionIndex623 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, null);
+        } else {
+            if (unionIndex623 == 1) {
+                Utf8 charSequence623;
+                Object oldString623 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(623);
+                if (oldString623 instanceof Utf8) {
+                    charSequence623 = (decoder).readString(((Utf8) oldString623));
+                } else {
+                    charSequence623 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, charSequence623);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F623': "+ unionIndex623));
+            }
+        }
+        int unionIndex624 = (decoder.readIndex());
+        if (unionIndex624 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, null);
+        } else {
+            if (unionIndex624 == 1) {
+                Utf8 charSequence624;
+                Object oldString624 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(624);
+                if (oldString624 instanceof Utf8) {
+                    charSequence624 = (decoder).readString(((Utf8) oldString624));
+                } else {
+                    charSequence624 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, charSequence624);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F624': "+ unionIndex624));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex625 = (decoder.readIndex());
+        if (unionIndex625 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, null);
+        } else {
+            if (unionIndex625 == 1) {
+                Utf8 charSequence625;
+                Object oldString625 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(625);
+                if (oldString625 instanceof Utf8) {
+                    charSequence625 = (decoder).readString(((Utf8) oldString625));
+                } else {
+                    charSequence625 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, charSequence625);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F625': "+ unionIndex625));
+            }
+        }
+        int unionIndex626 = (decoder.readIndex());
+        if (unionIndex626 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, null);
+        } else {
+            if (unionIndex626 == 1) {
+                Utf8 charSequence626;
+                Object oldString626 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(626);
+                if (oldString626 instanceof Utf8) {
+                    charSequence626 = (decoder).readString(((Utf8) oldString626));
+                } else {
+                    charSequence626 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, charSequence626);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F626': "+ unionIndex626));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex627 = (decoder.readIndex());
+        if (unionIndex627 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, null);
+        } else {
+            if (unionIndex627 == 1) {
+                Utf8 charSequence627;
+                Object oldString627 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(627);
+                if (oldString627 instanceof Utf8) {
+                    charSequence627 = (decoder).readString(((Utf8) oldString627));
+                } else {
+                    charSequence627 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, charSequence627);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F627': "+ unionIndex627));
+            }
+        }
+        int unionIndex628 = (decoder.readIndex());
+        if (unionIndex628 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, null);
+        } else {
+            if (unionIndex628 == 1) {
+                Utf8 charSequence628;
+                Object oldString628 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(628);
+                if (oldString628 instanceof Utf8) {
+                    charSequence628 = (decoder).readString(((Utf8) oldString628));
+                } else {
+                    charSequence628 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, charSequence628);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F628': "+ unionIndex628));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex629 = (decoder.readIndex());
+        if (unionIndex629 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, null);
+        } else {
+            if (unionIndex629 == 1) {
+                Utf8 charSequence629;
+                Object oldString629 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(629);
+                if (oldString629 instanceof Utf8) {
+                    charSequence629 = (decoder).readString(((Utf8) oldString629));
+                } else {
+                    charSequence629 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, charSequence629);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F629': "+ unionIndex629));
+            }
+        }
+        int unionIndex630 = (decoder.readIndex());
+        if (unionIndex630 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, null);
+        } else {
+            if (unionIndex630 == 1) {
+                Utf8 charSequence630;
+                Object oldString630 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(630);
+                if (oldString630 instanceof Utf8) {
+                    charSequence630 = (decoder).readString(((Utf8) oldString630));
+                } else {
+                    charSequence630 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, charSequence630);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F630': "+ unionIndex630));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex631 = (decoder.readIndex());
+        if (unionIndex631 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, null);
+        } else {
+            if (unionIndex631 == 1) {
+                Utf8 charSequence631;
+                Object oldString631 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(631);
+                if (oldString631 instanceof Utf8) {
+                    charSequence631 = (decoder).readString(((Utf8) oldString631));
+                } else {
+                    charSequence631 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, charSequence631);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F631': "+ unionIndex631));
+            }
+        }
+        int unionIndex632 = (decoder.readIndex());
+        if (unionIndex632 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, null);
+        } else {
+            if (unionIndex632 == 1) {
+                Utf8 charSequence632;
+                Object oldString632 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(632);
+                if (oldString632 instanceof Utf8) {
+                    charSequence632 = (decoder).readString(((Utf8) oldString632));
+                } else {
+                    charSequence632 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, charSequence632);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F632': "+ unionIndex632));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex633 = (decoder.readIndex());
+        if (unionIndex633 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, null);
+        } else {
+            if (unionIndex633 == 1) {
+                Utf8 charSequence633;
+                Object oldString633 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(633);
+                if (oldString633 instanceof Utf8) {
+                    charSequence633 = (decoder).readString(((Utf8) oldString633));
+                } else {
+                    charSequence633 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, charSequence633);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F633': "+ unionIndex633));
+            }
+        }
+        int unionIndex634 = (decoder.readIndex());
+        if (unionIndex634 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, null);
+        } else {
+            if (unionIndex634 == 1) {
+                Utf8 charSequence634;
+                Object oldString634 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(634);
+                if (oldString634 instanceof Utf8) {
+                    charSequence634 = (decoder).readString(((Utf8) oldString634));
+                } else {
+                    charSequence634 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, charSequence634);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F634': "+ unionIndex634));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex635 = (decoder.readIndex());
+        if (unionIndex635 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, null);
+        } else {
+            if (unionIndex635 == 1) {
+                Utf8 charSequence635;
+                Object oldString635 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(635);
+                if (oldString635 instanceof Utf8) {
+                    charSequence635 = (decoder).readString(((Utf8) oldString635));
+                } else {
+                    charSequence635 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, charSequence635);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F635': "+ unionIndex635));
+            }
+        }
+        int unionIndex636 = (decoder.readIndex());
+        if (unionIndex636 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, null);
+        } else {
+            if (unionIndex636 == 1) {
+                Utf8 charSequence636;
+                Object oldString636 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(636);
+                if (oldString636 instanceof Utf8) {
+                    charSequence636 = (decoder).readString(((Utf8) oldString636));
+                } else {
+                    charSequence636 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, charSequence636);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F636': "+ unionIndex636));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex637 = (decoder.readIndex());
+        if (unionIndex637 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, null);
+        } else {
+            if (unionIndex637 == 1) {
+                Utf8 charSequence637;
+                Object oldString637 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(637);
+                if (oldString637 instanceof Utf8) {
+                    charSequence637 = (decoder).readString(((Utf8) oldString637));
+                } else {
+                    charSequence637 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, charSequence637);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F637': "+ unionIndex637));
+            }
+        }
+        int unionIndex638 = (decoder.readIndex());
+        if (unionIndex638 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, null);
+        } else {
+            if (unionIndex638 == 1) {
+                Utf8 charSequence638;
+                Object oldString638 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(638);
+                if (oldString638 instanceof Utf8) {
+                    charSequence638 = (decoder).readString(((Utf8) oldString638));
+                } else {
+                    charSequence638 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, charSequence638);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F638': "+ unionIndex638));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex639 = (decoder.readIndex());
+        if (unionIndex639 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, null);
+        } else {
+            if (unionIndex639 == 1) {
+                Utf8 charSequence639;
+                Object oldString639 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(639);
+                if (oldString639 instanceof Utf8) {
+                    charSequence639 = (decoder).readString(((Utf8) oldString639));
+                } else {
+                    charSequence639 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, charSequence639);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F639': "+ unionIndex639));
+            }
+        }
+        int unionIndex640 = (decoder.readIndex());
+        if (unionIndex640 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, null);
+        } else {
+            if (unionIndex640 == 1) {
+                Utf8 charSequence640;
+                Object oldString640 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(640);
+                if (oldString640 instanceof Utf8) {
+                    charSequence640 = (decoder).readString(((Utf8) oldString640));
+                } else {
+                    charSequence640 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, charSequence640);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F640': "+ unionIndex640));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex641 = (decoder.readIndex());
+        if (unionIndex641 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, null);
+        } else {
+            if (unionIndex641 == 1) {
+                Utf8 charSequence641;
+                Object oldString641 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(641);
+                if (oldString641 instanceof Utf8) {
+                    charSequence641 = (decoder).readString(((Utf8) oldString641));
+                } else {
+                    charSequence641 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, charSequence641);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F641': "+ unionIndex641));
+            }
+        }
+        int unionIndex642 = (decoder.readIndex());
+        if (unionIndex642 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, null);
+        } else {
+            if (unionIndex642 == 1) {
+                Utf8 charSequence642;
+                Object oldString642 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(642);
+                if (oldString642 instanceof Utf8) {
+                    charSequence642 = (decoder).readString(((Utf8) oldString642));
+                } else {
+                    charSequence642 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, charSequence642);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F642': "+ unionIndex642));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex643 = (decoder.readIndex());
+        if (unionIndex643 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, null);
+        } else {
+            if (unionIndex643 == 1) {
+                Utf8 charSequence643;
+                Object oldString643 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(643);
+                if (oldString643 instanceof Utf8) {
+                    charSequence643 = (decoder).readString(((Utf8) oldString643));
+                } else {
+                    charSequence643 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, charSequence643);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F643': "+ unionIndex643));
+            }
+        }
+        int unionIndex644 = (decoder.readIndex());
+        if (unionIndex644 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, null);
+        } else {
+            if (unionIndex644 == 1) {
+                Utf8 charSequence644;
+                Object oldString644 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(644);
+                if (oldString644 instanceof Utf8) {
+                    charSequence644 = (decoder).readString(((Utf8) oldString644));
+                } else {
+                    charSequence644 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, charSequence644);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F644': "+ unionIndex644));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex645 = (decoder.readIndex());
+        if (unionIndex645 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, null);
+        } else {
+            if (unionIndex645 == 1) {
+                Utf8 charSequence645;
+                Object oldString645 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(645);
+                if (oldString645 instanceof Utf8) {
+                    charSequence645 = (decoder).readString(((Utf8) oldString645));
+                } else {
+                    charSequence645 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, charSequence645);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F645': "+ unionIndex645));
+            }
+        }
+        int unionIndex646 = (decoder.readIndex());
+        if (unionIndex646 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, null);
+        } else {
+            if (unionIndex646 == 1) {
+                Utf8 charSequence646;
+                Object oldString646 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(646);
+                if (oldString646 instanceof Utf8) {
+                    charSequence646 = (decoder).readString(((Utf8) oldString646));
+                } else {
+                    charSequence646 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, charSequence646);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F646': "+ unionIndex646));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex647 = (decoder.readIndex());
+        if (unionIndex647 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, null);
+        } else {
+            if (unionIndex647 == 1) {
+                Utf8 charSequence647;
+                Object oldString647 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(647);
+                if (oldString647 instanceof Utf8) {
+                    charSequence647 = (decoder).readString(((Utf8) oldString647));
+                } else {
+                    charSequence647 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, charSequence647);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F647': "+ unionIndex647));
+            }
+        }
+        int unionIndex648 = (decoder.readIndex());
+        if (unionIndex648 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, null);
+        } else {
+            if (unionIndex648 == 1) {
+                Utf8 charSequence648;
+                Object oldString648 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(648);
+                if (oldString648 instanceof Utf8) {
+                    charSequence648 = (decoder).readString(((Utf8) oldString648));
+                } else {
+                    charSequence648 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, charSequence648);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F648': "+ unionIndex648));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex649 = (decoder.readIndex());
+        if (unionIndex649 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, null);
+        } else {
+            if (unionIndex649 == 1) {
+                Utf8 charSequence649;
+                Object oldString649 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(649);
+                if (oldString649 instanceof Utf8) {
+                    charSequence649 = (decoder).readString(((Utf8) oldString649));
+                } else {
+                    charSequence649 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, charSequence649);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F649': "+ unionIndex649));
+            }
+        }
+        int unionIndex650 = (decoder.readIndex());
+        if (unionIndex650 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, null);
+        } else {
+            if (unionIndex650 == 1) {
+                Utf8 charSequence650;
+                Object oldString650 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(650);
+                if (oldString650 instanceof Utf8) {
+                    charSequence650 = (decoder).readString(((Utf8) oldString650));
+                } else {
+                    charSequence650 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, charSequence650);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F650': "+ unionIndex650));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex651 = (decoder.readIndex());
+        if (unionIndex651 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, null);
+        } else {
+            if (unionIndex651 == 1) {
+                Utf8 charSequence651;
+                Object oldString651 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(651);
+                if (oldString651 instanceof Utf8) {
+                    charSequence651 = (decoder).readString(((Utf8) oldString651));
+                } else {
+                    charSequence651 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, charSequence651);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F651': "+ unionIndex651));
+            }
+        }
+        int unionIndex652 = (decoder.readIndex());
+        if (unionIndex652 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, null);
+        } else {
+            if (unionIndex652 == 1) {
+                Utf8 charSequence652;
+                Object oldString652 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(652);
+                if (oldString652 instanceof Utf8) {
+                    charSequence652 = (decoder).readString(((Utf8) oldString652));
+                } else {
+                    charSequence652 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, charSequence652);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F652': "+ unionIndex652));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex653 = (decoder.readIndex());
+        if (unionIndex653 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, null);
+        } else {
+            if (unionIndex653 == 1) {
+                Utf8 charSequence653;
+                Object oldString653 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(653);
+                if (oldString653 instanceof Utf8) {
+                    charSequence653 = (decoder).readString(((Utf8) oldString653));
+                } else {
+                    charSequence653 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, charSequence653);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F653': "+ unionIndex653));
+            }
+        }
+        int unionIndex654 = (decoder.readIndex());
+        if (unionIndex654 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, null);
+        } else {
+            if (unionIndex654 == 1) {
+                Utf8 charSequence654;
+                Object oldString654 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(654);
+                if (oldString654 instanceof Utf8) {
+                    charSequence654 = (decoder).readString(((Utf8) oldString654));
+                } else {
+                    charSequence654 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, charSequence654);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F654': "+ unionIndex654));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex655 = (decoder.readIndex());
+        if (unionIndex655 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, null);
+        } else {
+            if (unionIndex655 == 1) {
+                Utf8 charSequence655;
+                Object oldString655 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(655);
+                if (oldString655 instanceof Utf8) {
+                    charSequence655 = (decoder).readString(((Utf8) oldString655));
+                } else {
+                    charSequence655 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, charSequence655);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F655': "+ unionIndex655));
+            }
+        }
+        int unionIndex656 = (decoder.readIndex());
+        if (unionIndex656 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, null);
+        } else {
+            if (unionIndex656 == 1) {
+                Utf8 charSequence656;
+                Object oldString656 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(656);
+                if (oldString656 instanceof Utf8) {
+                    charSequence656 = (decoder).readString(((Utf8) oldString656));
+                } else {
+                    charSequence656 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, charSequence656);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F656': "+ unionIndex656));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex657 = (decoder.readIndex());
+        if (unionIndex657 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, null);
+        } else {
+            if (unionIndex657 == 1) {
+                Utf8 charSequence657;
+                Object oldString657 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(657);
+                if (oldString657 instanceof Utf8) {
+                    charSequence657 = (decoder).readString(((Utf8) oldString657));
+                } else {
+                    charSequence657 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, charSequence657);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F657': "+ unionIndex657));
+            }
+        }
+        int unionIndex658 = (decoder.readIndex());
+        if (unionIndex658 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, null);
+        } else {
+            if (unionIndex658 == 1) {
+                Utf8 charSequence658;
+                Object oldString658 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(658);
+                if (oldString658 instanceof Utf8) {
+                    charSequence658 = (decoder).readString(((Utf8) oldString658));
+                } else {
+                    charSequence658 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, charSequence658);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F658': "+ unionIndex658));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex659 = (decoder.readIndex());
+        if (unionIndex659 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, null);
+        } else {
+            if (unionIndex659 == 1) {
+                Utf8 charSequence659;
+                Object oldString659 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(659);
+                if (oldString659 instanceof Utf8) {
+                    charSequence659 = (decoder).readString(((Utf8) oldString659));
+                } else {
+                    charSequence659 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, charSequence659);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F659': "+ unionIndex659));
+            }
+        }
+        int unionIndex660 = (decoder.readIndex());
+        if (unionIndex660 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, null);
+        } else {
+            if (unionIndex660 == 1) {
+                Utf8 charSequence660;
+                Object oldString660 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(660);
+                if (oldString660 instanceof Utf8) {
+                    charSequence660 = (decoder).readString(((Utf8) oldString660));
+                } else {
+                    charSequence660 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, charSequence660);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F660': "+ unionIndex660));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex661 = (decoder.readIndex());
+        if (unionIndex661 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, null);
+        } else {
+            if (unionIndex661 == 1) {
+                Utf8 charSequence661;
+                Object oldString661 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(661);
+                if (oldString661 instanceof Utf8) {
+                    charSequence661 = (decoder).readString(((Utf8) oldString661));
+                } else {
+                    charSequence661 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, charSequence661);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F661': "+ unionIndex661));
+            }
+        }
+        int unionIndex662 = (decoder.readIndex());
+        if (unionIndex662 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, null);
+        } else {
+            if (unionIndex662 == 1) {
+                Utf8 charSequence662;
+                Object oldString662 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(662);
+                if (oldString662 instanceof Utf8) {
+                    charSequence662 = (decoder).readString(((Utf8) oldString662));
+                } else {
+                    charSequence662 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, charSequence662);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F662': "+ unionIndex662));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex663 = (decoder.readIndex());
+        if (unionIndex663 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, null);
+        } else {
+            if (unionIndex663 == 1) {
+                Utf8 charSequence663;
+                Object oldString663 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(663);
+                if (oldString663 instanceof Utf8) {
+                    charSequence663 = (decoder).readString(((Utf8) oldString663));
+                } else {
+                    charSequence663 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, charSequence663);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F663': "+ unionIndex663));
+            }
+        }
+        int unionIndex664 = (decoder.readIndex());
+        if (unionIndex664 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, null);
+        } else {
+            if (unionIndex664 == 1) {
+                Utf8 charSequence664;
+                Object oldString664 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(664);
+                if (oldString664 instanceof Utf8) {
+                    charSequence664 = (decoder).readString(((Utf8) oldString664));
+                } else {
+                    charSequence664 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, charSequence664);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F664': "+ unionIndex664));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex665 = (decoder.readIndex());
+        if (unionIndex665 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, null);
+        } else {
+            if (unionIndex665 == 1) {
+                Utf8 charSequence665;
+                Object oldString665 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(665);
+                if (oldString665 instanceof Utf8) {
+                    charSequence665 = (decoder).readString(((Utf8) oldString665));
+                } else {
+                    charSequence665 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, charSequence665);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F665': "+ unionIndex665));
+            }
+        }
+        int unionIndex666 = (decoder.readIndex());
+        if (unionIndex666 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, null);
+        } else {
+            if (unionIndex666 == 1) {
+                Utf8 charSequence666;
+                Object oldString666 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(666);
+                if (oldString666 instanceof Utf8) {
+                    charSequence666 = (decoder).readString(((Utf8) oldString666));
+                } else {
+                    charSequence666 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, charSequence666);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F666': "+ unionIndex666));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex667 = (decoder.readIndex());
+        if (unionIndex667 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, null);
+        } else {
+            if (unionIndex667 == 1) {
+                Utf8 charSequence667;
+                Object oldString667 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(667);
+                if (oldString667 instanceof Utf8) {
+                    charSequence667 = (decoder).readString(((Utf8) oldString667));
+                } else {
+                    charSequence667 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, charSequence667);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F667': "+ unionIndex667));
+            }
+        }
+        int unionIndex668 = (decoder.readIndex());
+        if (unionIndex668 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, null);
+        } else {
+            if (unionIndex668 == 1) {
+                Utf8 charSequence668;
+                Object oldString668 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(668);
+                if (oldString668 instanceof Utf8) {
+                    charSequence668 = (decoder).readString(((Utf8) oldString668));
+                } else {
+                    charSequence668 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, charSequence668);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F668': "+ unionIndex668));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex669 = (decoder.readIndex());
+        if (unionIndex669 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, null);
+        } else {
+            if (unionIndex669 == 1) {
+                Utf8 charSequence669;
+                Object oldString669 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(669);
+                if (oldString669 instanceof Utf8) {
+                    charSequence669 = (decoder).readString(((Utf8) oldString669));
+                } else {
+                    charSequence669 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, charSequence669);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F669': "+ unionIndex669));
+            }
+        }
+        int unionIndex670 = (decoder.readIndex());
+        if (unionIndex670 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, null);
+        } else {
+            if (unionIndex670 == 1) {
+                Utf8 charSequence670;
+                Object oldString670 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(670);
+                if (oldString670 instanceof Utf8) {
+                    charSequence670 = (decoder).readString(((Utf8) oldString670));
+                } else {
+                    charSequence670 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, charSequence670);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F670': "+ unionIndex670));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex671 = (decoder.readIndex());
+        if (unionIndex671 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, null);
+        } else {
+            if (unionIndex671 == 1) {
+                Utf8 charSequence671;
+                Object oldString671 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(671);
+                if (oldString671 instanceof Utf8) {
+                    charSequence671 = (decoder).readString(((Utf8) oldString671));
+                } else {
+                    charSequence671 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, charSequence671);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F671': "+ unionIndex671));
+            }
+        }
+        int unionIndex672 = (decoder.readIndex());
+        if (unionIndex672 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, null);
+        } else {
+            if (unionIndex672 == 1) {
+                Utf8 charSequence672;
+                Object oldString672 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(672);
+                if (oldString672 instanceof Utf8) {
+                    charSequence672 = (decoder).readString(((Utf8) oldString672));
+                } else {
+                    charSequence672 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, charSequence672);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F672': "+ unionIndex672));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex673 = (decoder.readIndex());
+        if (unionIndex673 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, null);
+        } else {
+            if (unionIndex673 == 1) {
+                Utf8 charSequence673;
+                Object oldString673 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(673);
+                if (oldString673 instanceof Utf8) {
+                    charSequence673 = (decoder).readString(((Utf8) oldString673));
+                } else {
+                    charSequence673 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, charSequence673);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F673': "+ unionIndex673));
+            }
+        }
+        int unionIndex674 = (decoder.readIndex());
+        if (unionIndex674 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, null);
+        } else {
+            if (unionIndex674 == 1) {
+                Utf8 charSequence674;
+                Object oldString674 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(674);
+                if (oldString674 instanceof Utf8) {
+                    charSequence674 = (decoder).readString(((Utf8) oldString674));
+                } else {
+                    charSequence674 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, charSequence674);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F674': "+ unionIndex674));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex675 = (decoder.readIndex());
+        if (unionIndex675 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, null);
+        } else {
+            if (unionIndex675 == 1) {
+                Utf8 charSequence675;
+                Object oldString675 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(675);
+                if (oldString675 instanceof Utf8) {
+                    charSequence675 = (decoder).readString(((Utf8) oldString675));
+                } else {
+                    charSequence675 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, charSequence675);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F675': "+ unionIndex675));
+            }
+        }
+        int unionIndex676 = (decoder.readIndex());
+        if (unionIndex676 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, null);
+        } else {
+            if (unionIndex676 == 1) {
+                Utf8 charSequence676;
+                Object oldString676 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(676);
+                if (oldString676 instanceof Utf8) {
+                    charSequence676 = (decoder).readString(((Utf8) oldString676));
+                } else {
+                    charSequence676 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, charSequence676);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F676': "+ unionIndex676));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex677 = (decoder.readIndex());
+        if (unionIndex677 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, null);
+        } else {
+            if (unionIndex677 == 1) {
+                Utf8 charSequence677;
+                Object oldString677 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(677);
+                if (oldString677 instanceof Utf8) {
+                    charSequence677 = (decoder).readString(((Utf8) oldString677));
+                } else {
+                    charSequence677 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, charSequence677);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F677': "+ unionIndex677));
+            }
+        }
+        int unionIndex678 = (decoder.readIndex());
+        if (unionIndex678 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, null);
+        } else {
+            if (unionIndex678 == 1) {
+                Utf8 charSequence678;
+                Object oldString678 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(678);
+                if (oldString678 instanceof Utf8) {
+                    charSequence678 = (decoder).readString(((Utf8) oldString678));
+                } else {
+                    charSequence678 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, charSequence678);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F678': "+ unionIndex678));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex679 = (decoder.readIndex());
+        if (unionIndex679 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, null);
+        } else {
+            if (unionIndex679 == 1) {
+                Utf8 charSequence679;
+                Object oldString679 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(679);
+                if (oldString679 instanceof Utf8) {
+                    charSequence679 = (decoder).readString(((Utf8) oldString679));
+                } else {
+                    charSequence679 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, charSequence679);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F679': "+ unionIndex679));
+            }
+        }
+        int unionIndex680 = (decoder.readIndex());
+        if (unionIndex680 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, null);
+        } else {
+            if (unionIndex680 == 1) {
+                Utf8 charSequence680;
+                Object oldString680 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(680);
+                if (oldString680 instanceof Utf8) {
+                    charSequence680 = (decoder).readString(((Utf8) oldString680));
+                } else {
+                    charSequence680 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, charSequence680);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F680': "+ unionIndex680));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex681 = (decoder.readIndex());
+        if (unionIndex681 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, null);
+        } else {
+            if (unionIndex681 == 1) {
+                Utf8 charSequence681;
+                Object oldString681 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(681);
+                if (oldString681 instanceof Utf8) {
+                    charSequence681 = (decoder).readString(((Utf8) oldString681));
+                } else {
+                    charSequence681 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, charSequence681);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F681': "+ unionIndex681));
+            }
+        }
+        int unionIndex682 = (decoder.readIndex());
+        if (unionIndex682 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, null);
+        } else {
+            if (unionIndex682 == 1) {
+                Utf8 charSequence682;
+                Object oldString682 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(682);
+                if (oldString682 instanceof Utf8) {
+                    charSequence682 = (decoder).readString(((Utf8) oldString682));
+                } else {
+                    charSequence682 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, charSequence682);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F682': "+ unionIndex682));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex683 = (decoder.readIndex());
+        if (unionIndex683 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, null);
+        } else {
+            if (unionIndex683 == 1) {
+                Utf8 charSequence683;
+                Object oldString683 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(683);
+                if (oldString683 instanceof Utf8) {
+                    charSequence683 = (decoder).readString(((Utf8) oldString683));
+                } else {
+                    charSequence683 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, charSequence683);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F683': "+ unionIndex683));
+            }
+        }
+        int unionIndex684 = (decoder.readIndex());
+        if (unionIndex684 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, null);
+        } else {
+            if (unionIndex684 == 1) {
+                Utf8 charSequence684;
+                Object oldString684 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(684);
+                if (oldString684 instanceof Utf8) {
+                    charSequence684 = (decoder).readString(((Utf8) oldString684));
+                } else {
+                    charSequence684 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, charSequence684);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F684': "+ unionIndex684));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex685 = (decoder.readIndex());
+        if (unionIndex685 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, null);
+        } else {
+            if (unionIndex685 == 1) {
+                Utf8 charSequence685;
+                Object oldString685 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(685);
+                if (oldString685 instanceof Utf8) {
+                    charSequence685 = (decoder).readString(((Utf8) oldString685));
+                } else {
+                    charSequence685 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, charSequence685);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F685': "+ unionIndex685));
+            }
+        }
+        int unionIndex686 = (decoder.readIndex());
+        if (unionIndex686 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, null);
+        } else {
+            if (unionIndex686 == 1) {
+                Utf8 charSequence686;
+                Object oldString686 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(686);
+                if (oldString686 instanceof Utf8) {
+                    charSequence686 = (decoder).readString(((Utf8) oldString686));
+                } else {
+                    charSequence686 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, charSequence686);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F686': "+ unionIndex686));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex687 = (decoder.readIndex());
+        if (unionIndex687 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, null);
+        } else {
+            if (unionIndex687 == 1) {
+                Utf8 charSequence687;
+                Object oldString687 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(687);
+                if (oldString687 instanceof Utf8) {
+                    charSequence687 = (decoder).readString(((Utf8) oldString687));
+                } else {
+                    charSequence687 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, charSequence687);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F687': "+ unionIndex687));
+            }
+        }
+        int unionIndex688 = (decoder.readIndex());
+        if (unionIndex688 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, null);
+        } else {
+            if (unionIndex688 == 1) {
+                Utf8 charSequence688;
+                Object oldString688 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(688);
+                if (oldString688 instanceof Utf8) {
+                    charSequence688 = (decoder).readString(((Utf8) oldString688));
+                } else {
+                    charSequence688 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, charSequence688);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F688': "+ unionIndex688));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex689 = (decoder.readIndex());
+        if (unionIndex689 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, null);
+        } else {
+            if (unionIndex689 == 1) {
+                Utf8 charSequence689;
+                Object oldString689 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(689);
+                if (oldString689 instanceof Utf8) {
+                    charSequence689 = (decoder).readString(((Utf8) oldString689));
+                } else {
+                    charSequence689 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, charSequence689);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F689': "+ unionIndex689));
+            }
+        }
+        int unionIndex690 = (decoder.readIndex());
+        if (unionIndex690 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, null);
+        } else {
+            if (unionIndex690 == 1) {
+                Utf8 charSequence690;
+                Object oldString690 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(690);
+                if (oldString690 instanceof Utf8) {
+                    charSequence690 = (decoder).readString(((Utf8) oldString690));
+                } else {
+                    charSequence690 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, charSequence690);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F690': "+ unionIndex690));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex691 = (decoder.readIndex());
+        if (unionIndex691 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, null);
+        } else {
+            if (unionIndex691 == 1) {
+                Utf8 charSequence691;
+                Object oldString691 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(691);
+                if (oldString691 instanceof Utf8) {
+                    charSequence691 = (decoder).readString(((Utf8) oldString691));
+                } else {
+                    charSequence691 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, charSequence691);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F691': "+ unionIndex691));
+            }
+        }
+        int unionIndex692 = (decoder.readIndex());
+        if (unionIndex692 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, null);
+        } else {
+            if (unionIndex692 == 1) {
+                Utf8 charSequence692;
+                Object oldString692 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(692);
+                if (oldString692 instanceof Utf8) {
+                    charSequence692 = (decoder).readString(((Utf8) oldString692));
+                } else {
+                    charSequence692 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, charSequence692);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F692': "+ unionIndex692));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex693 = (decoder.readIndex());
+        if (unionIndex693 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, null);
+        } else {
+            if (unionIndex693 == 1) {
+                Utf8 charSequence693;
+                Object oldString693 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(693);
+                if (oldString693 instanceof Utf8) {
+                    charSequence693 = (decoder).readString(((Utf8) oldString693));
+                } else {
+                    charSequence693 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, charSequence693);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F693': "+ unionIndex693));
+            }
+        }
+        int unionIndex694 = (decoder.readIndex());
+        if (unionIndex694 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, null);
+        } else {
+            if (unionIndex694 == 1) {
+                Utf8 charSequence694;
+                Object oldString694 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(694);
+                if (oldString694 instanceof Utf8) {
+                    charSequence694 = (decoder).readString(((Utf8) oldString694));
+                } else {
+                    charSequence694 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, charSequence694);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F694': "+ unionIndex694));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex695 = (decoder.readIndex());
+        if (unionIndex695 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, null);
+        } else {
+            if (unionIndex695 == 1) {
+                Utf8 charSequence695;
+                Object oldString695 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(695);
+                if (oldString695 instanceof Utf8) {
+                    charSequence695 = (decoder).readString(((Utf8) oldString695));
+                } else {
+                    charSequence695 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, charSequence695);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F695': "+ unionIndex695));
+            }
+        }
+        int unionIndex696 = (decoder.readIndex());
+        if (unionIndex696 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, null);
+        } else {
+            if (unionIndex696 == 1) {
+                Utf8 charSequence696;
+                Object oldString696 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(696);
+                if (oldString696 instanceof Utf8) {
+                    charSequence696 = (decoder).readString(((Utf8) oldString696));
+                } else {
+                    charSequence696 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, charSequence696);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F696': "+ unionIndex696));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex697 = (decoder.readIndex());
+        if (unionIndex697 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, null);
+        } else {
+            if (unionIndex697 == 1) {
+                Utf8 charSequence697;
+                Object oldString697 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(697);
+                if (oldString697 instanceof Utf8) {
+                    charSequence697 = (decoder).readString(((Utf8) oldString697));
+                } else {
+                    charSequence697 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, charSequence697);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F697': "+ unionIndex697));
+            }
+        }
+        int unionIndex698 = (decoder.readIndex());
+        if (unionIndex698 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, null);
+        } else {
+            if (unionIndex698 == 1) {
+                Utf8 charSequence698;
+                Object oldString698 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(698);
+                if (oldString698 instanceof Utf8) {
+                    charSequence698 = (decoder).readString(((Utf8) oldString698));
+                } else {
+                    charSequence698 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, charSequence698);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F698': "+ unionIndex698));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex699 = (decoder.readIndex());
+        if (unionIndex699 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, null);
+        } else {
+            if (unionIndex699 == 1) {
+                Utf8 charSequence699;
+                Object oldString699 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(699);
+                if (oldString699 instanceof Utf8) {
+                    charSequence699 = (decoder).readString(((Utf8) oldString699));
+                } else {
+                    charSequence699 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, charSequence699);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F699': "+ unionIndex699));
+            }
+        }
+        int unionIndex700 = (decoder.readIndex());
+        if (unionIndex700 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, null);
+        } else {
+            if (unionIndex700 == 1) {
+                Utf8 charSequence700;
+                Object oldString700 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(700);
+                if (oldString700 instanceof Utf8) {
+                    charSequence700 = (decoder).readString(((Utf8) oldString700));
+                } else {
+                    charSequence700 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, charSequence700);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F700': "+ unionIndex700));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex701 = (decoder.readIndex());
+        if (unionIndex701 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, null);
+        } else {
+            if (unionIndex701 == 1) {
+                Utf8 charSequence701;
+                Object oldString701 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(701);
+                if (oldString701 instanceof Utf8) {
+                    charSequence701 = (decoder).readString(((Utf8) oldString701));
+                } else {
+                    charSequence701 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, charSequence701);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F701': "+ unionIndex701));
+            }
+        }
+        int unionIndex702 = (decoder.readIndex());
+        if (unionIndex702 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, null);
+        } else {
+            if (unionIndex702 == 1) {
+                Utf8 charSequence702;
+                Object oldString702 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(702);
+                if (oldString702 instanceof Utf8) {
+                    charSequence702 = (decoder).readString(((Utf8) oldString702));
+                } else {
+                    charSequence702 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, charSequence702);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F702': "+ unionIndex702));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex703 = (decoder.readIndex());
+        if (unionIndex703 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, null);
+        } else {
+            if (unionIndex703 == 1) {
+                Utf8 charSequence703;
+                Object oldString703 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(703);
+                if (oldString703 instanceof Utf8) {
+                    charSequence703 = (decoder).readString(((Utf8) oldString703));
+                } else {
+                    charSequence703 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, charSequence703);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F703': "+ unionIndex703));
+            }
+        }
+        int unionIndex704 = (decoder.readIndex());
+        if (unionIndex704 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, null);
+        } else {
+            if (unionIndex704 == 1) {
+                Utf8 charSequence704;
+                Object oldString704 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(704);
+                if (oldString704 instanceof Utf8) {
+                    charSequence704 = (decoder).readString(((Utf8) oldString704));
+                } else {
+                    charSequence704 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, charSequence704);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F704': "+ unionIndex704));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex705 = (decoder.readIndex());
+        if (unionIndex705 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, null);
+        } else {
+            if (unionIndex705 == 1) {
+                Utf8 charSequence705;
+                Object oldString705 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(705);
+                if (oldString705 instanceof Utf8) {
+                    charSequence705 = (decoder).readString(((Utf8) oldString705));
+                } else {
+                    charSequence705 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, charSequence705);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F705': "+ unionIndex705));
+            }
+        }
+        int unionIndex706 = (decoder.readIndex());
+        if (unionIndex706 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, null);
+        } else {
+            if (unionIndex706 == 1) {
+                Utf8 charSequence706;
+                Object oldString706 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(706);
+                if (oldString706 instanceof Utf8) {
+                    charSequence706 = (decoder).readString(((Utf8) oldString706));
+                } else {
+                    charSequence706 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, charSequence706);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F706': "+ unionIndex706));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex707 = (decoder.readIndex());
+        if (unionIndex707 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, null);
+        } else {
+            if (unionIndex707 == 1) {
+                Utf8 charSequence707;
+                Object oldString707 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(707);
+                if (oldString707 instanceof Utf8) {
+                    charSequence707 = (decoder).readString(((Utf8) oldString707));
+                } else {
+                    charSequence707 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, charSequence707);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F707': "+ unionIndex707));
+            }
+        }
+        int unionIndex708 = (decoder.readIndex());
+        if (unionIndex708 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, null);
+        } else {
+            if (unionIndex708 == 1) {
+                Utf8 charSequence708;
+                Object oldString708 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(708);
+                if (oldString708 instanceof Utf8) {
+                    charSequence708 = (decoder).readString(((Utf8) oldString708));
+                } else {
+                    charSequence708 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, charSequence708);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F708': "+ unionIndex708));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex709 = (decoder.readIndex());
+        if (unionIndex709 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, null);
+        } else {
+            if (unionIndex709 == 1) {
+                Utf8 charSequence709;
+                Object oldString709 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(709);
+                if (oldString709 instanceof Utf8) {
+                    charSequence709 = (decoder).readString(((Utf8) oldString709));
+                } else {
+                    charSequence709 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, charSequence709);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F709': "+ unionIndex709));
+            }
+        }
+        int unionIndex710 = (decoder.readIndex());
+        if (unionIndex710 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, null);
+        } else {
+            if (unionIndex710 == 1) {
+                Utf8 charSequence710;
+                Object oldString710 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(710);
+                if (oldString710 instanceof Utf8) {
+                    charSequence710 = (decoder).readString(((Utf8) oldString710));
+                } else {
+                    charSequence710 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, charSequence710);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F710': "+ unionIndex710));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex711 = (decoder.readIndex());
+        if (unionIndex711 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, null);
+        } else {
+            if (unionIndex711 == 1) {
+                Utf8 charSequence711;
+                Object oldString711 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(711);
+                if (oldString711 instanceof Utf8) {
+                    charSequence711 = (decoder).readString(((Utf8) oldString711));
+                } else {
+                    charSequence711 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, charSequence711);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F711': "+ unionIndex711));
+            }
+        }
+        int unionIndex712 = (decoder.readIndex());
+        if (unionIndex712 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, null);
+        } else {
+            if (unionIndex712 == 1) {
+                Utf8 charSequence712;
+                Object oldString712 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(712);
+                if (oldString712 instanceof Utf8) {
+                    charSequence712 = (decoder).readString(((Utf8) oldString712));
+                } else {
+                    charSequence712 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, charSequence712);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F712': "+ unionIndex712));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex713 = (decoder.readIndex());
+        if (unionIndex713 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, null);
+        } else {
+            if (unionIndex713 == 1) {
+                Utf8 charSequence713;
+                Object oldString713 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(713);
+                if (oldString713 instanceof Utf8) {
+                    charSequence713 = (decoder).readString(((Utf8) oldString713));
+                } else {
+                    charSequence713 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, charSequence713);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F713': "+ unionIndex713));
+            }
+        }
+        int unionIndex714 = (decoder.readIndex());
+        if (unionIndex714 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, null);
+        } else {
+            if (unionIndex714 == 1) {
+                Utf8 charSequence714;
+                Object oldString714 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(714);
+                if (oldString714 instanceof Utf8) {
+                    charSequence714 = (decoder).readString(((Utf8) oldString714));
+                } else {
+                    charSequence714 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, charSequence714);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F714': "+ unionIndex714));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex715 = (decoder.readIndex());
+        if (unionIndex715 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, null);
+        } else {
+            if (unionIndex715 == 1) {
+                Utf8 charSequence715;
+                Object oldString715 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(715);
+                if (oldString715 instanceof Utf8) {
+                    charSequence715 = (decoder).readString(((Utf8) oldString715));
+                } else {
+                    charSequence715 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, charSequence715);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F715': "+ unionIndex715));
+            }
+        }
+        int unionIndex716 = (decoder.readIndex());
+        if (unionIndex716 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, null);
+        } else {
+            if (unionIndex716 == 1) {
+                Utf8 charSequence716;
+                Object oldString716 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(716);
+                if (oldString716 instanceof Utf8) {
+                    charSequence716 = (decoder).readString(((Utf8) oldString716));
+                } else {
+                    charSequence716 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, charSequence716);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F716': "+ unionIndex716));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex717 = (decoder.readIndex());
+        if (unionIndex717 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, null);
+        } else {
+            if (unionIndex717 == 1) {
+                Utf8 charSequence717;
+                Object oldString717 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(717);
+                if (oldString717 instanceof Utf8) {
+                    charSequence717 = (decoder).readString(((Utf8) oldString717));
+                } else {
+                    charSequence717 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, charSequence717);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F717': "+ unionIndex717));
+            }
+        }
+        int unionIndex718 = (decoder.readIndex());
+        if (unionIndex718 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, null);
+        } else {
+            if (unionIndex718 == 1) {
+                Utf8 charSequence718;
+                Object oldString718 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(718);
+                if (oldString718 instanceof Utf8) {
+                    charSequence718 = (decoder).readString(((Utf8) oldString718));
+                } else {
+                    charSequence718 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, charSequence718);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F718': "+ unionIndex718));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex719 = (decoder.readIndex());
+        if (unionIndex719 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, null);
+        } else {
+            if (unionIndex719 == 1) {
+                Utf8 charSequence719;
+                Object oldString719 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(719);
+                if (oldString719 instanceof Utf8) {
+                    charSequence719 = (decoder).readString(((Utf8) oldString719));
+                } else {
+                    charSequence719 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, charSequence719);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F719': "+ unionIndex719));
+            }
+        }
+        int unionIndex720 = (decoder.readIndex());
+        if (unionIndex720 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, null);
+        } else {
+            if (unionIndex720 == 1) {
+                Utf8 charSequence720;
+                Object oldString720 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(720);
+                if (oldString720 instanceof Utf8) {
+                    charSequence720 = (decoder).readString(((Utf8) oldString720));
+                } else {
+                    charSequence720 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, charSequence720);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F720': "+ unionIndex720));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex721 = (decoder.readIndex());
+        if (unionIndex721 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, null);
+        } else {
+            if (unionIndex721 == 1) {
+                Utf8 charSequence721;
+                Object oldString721 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(721);
+                if (oldString721 instanceof Utf8) {
+                    charSequence721 = (decoder).readString(((Utf8) oldString721));
+                } else {
+                    charSequence721 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, charSequence721);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F721': "+ unionIndex721));
+            }
+        }
+        int unionIndex722 = (decoder.readIndex());
+        if (unionIndex722 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, null);
+        } else {
+            if (unionIndex722 == 1) {
+                Utf8 charSequence722;
+                Object oldString722 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(722);
+                if (oldString722 instanceof Utf8) {
+                    charSequence722 = (decoder).readString(((Utf8) oldString722));
+                } else {
+                    charSequence722 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, charSequence722);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F722': "+ unionIndex722));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex723 = (decoder.readIndex());
+        if (unionIndex723 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, null);
+        } else {
+            if (unionIndex723 == 1) {
+                Utf8 charSequence723;
+                Object oldString723 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(723);
+                if (oldString723 instanceof Utf8) {
+                    charSequence723 = (decoder).readString(((Utf8) oldString723));
+                } else {
+                    charSequence723 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, charSequence723);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F723': "+ unionIndex723));
+            }
+        }
+        int unionIndex724 = (decoder.readIndex());
+        if (unionIndex724 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, null);
+        } else {
+            if (unionIndex724 == 1) {
+                Utf8 charSequence724;
+                Object oldString724 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(724);
+                if (oldString724 instanceof Utf8) {
+                    charSequence724 = (decoder).readString(((Utf8) oldString724));
+                } else {
+                    charSequence724 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, charSequence724);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F724': "+ unionIndex724));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex725 = (decoder.readIndex());
+        if (unionIndex725 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, null);
+        } else {
+            if (unionIndex725 == 1) {
+                Utf8 charSequence725;
+                Object oldString725 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(725);
+                if (oldString725 instanceof Utf8) {
+                    charSequence725 = (decoder).readString(((Utf8) oldString725));
+                } else {
+                    charSequence725 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, charSequence725);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F725': "+ unionIndex725));
+            }
+        }
+        int unionIndex726 = (decoder.readIndex());
+        if (unionIndex726 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, null);
+        } else {
+            if (unionIndex726 == 1) {
+                Utf8 charSequence726;
+                Object oldString726 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(726);
+                if (oldString726 instanceof Utf8) {
+                    charSequence726 = (decoder).readString(((Utf8) oldString726));
+                } else {
+                    charSequence726 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, charSequence726);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F726': "+ unionIndex726));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex727 = (decoder.readIndex());
+        if (unionIndex727 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, null);
+        } else {
+            if (unionIndex727 == 1) {
+                Utf8 charSequence727;
+                Object oldString727 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(727);
+                if (oldString727 instanceof Utf8) {
+                    charSequence727 = (decoder).readString(((Utf8) oldString727));
+                } else {
+                    charSequence727 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, charSequence727);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F727': "+ unionIndex727));
+            }
+        }
+        int unionIndex728 = (decoder.readIndex());
+        if (unionIndex728 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, null);
+        } else {
+            if (unionIndex728 == 1) {
+                Utf8 charSequence728;
+                Object oldString728 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(728);
+                if (oldString728 instanceof Utf8) {
+                    charSequence728 = (decoder).readString(((Utf8) oldString728));
+                } else {
+                    charSequence728 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, charSequence728);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F728': "+ unionIndex728));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex729 = (decoder.readIndex());
+        if (unionIndex729 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, null);
+        } else {
+            if (unionIndex729 == 1) {
+                Utf8 charSequence729;
+                Object oldString729 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(729);
+                if (oldString729 instanceof Utf8) {
+                    charSequence729 = (decoder).readString(((Utf8) oldString729));
+                } else {
+                    charSequence729 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, charSequence729);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F729': "+ unionIndex729));
+            }
+        }
+        int unionIndex730 = (decoder.readIndex());
+        if (unionIndex730 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, null);
+        } else {
+            if (unionIndex730 == 1) {
+                Utf8 charSequence730;
+                Object oldString730 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(730);
+                if (oldString730 instanceof Utf8) {
+                    charSequence730 = (decoder).readString(((Utf8) oldString730));
+                } else {
+                    charSequence730 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, charSequence730);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F730': "+ unionIndex730));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex731 = (decoder.readIndex());
+        if (unionIndex731 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, null);
+        } else {
+            if (unionIndex731 == 1) {
+                Utf8 charSequence731;
+                Object oldString731 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(731);
+                if (oldString731 instanceof Utf8) {
+                    charSequence731 = (decoder).readString(((Utf8) oldString731));
+                } else {
+                    charSequence731 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, charSequence731);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F731': "+ unionIndex731));
+            }
+        }
+        int unionIndex732 = (decoder.readIndex());
+        if (unionIndex732 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, null);
+        } else {
+            if (unionIndex732 == 1) {
+                Utf8 charSequence732;
+                Object oldString732 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(732);
+                if (oldString732 instanceof Utf8) {
+                    charSequence732 = (decoder).readString(((Utf8) oldString732));
+                } else {
+                    charSequence732 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, charSequence732);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F732': "+ unionIndex732));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex733 = (decoder.readIndex());
+        if (unionIndex733 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, null);
+        } else {
+            if (unionIndex733 == 1) {
+                Utf8 charSequence733;
+                Object oldString733 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(733);
+                if (oldString733 instanceof Utf8) {
+                    charSequence733 = (decoder).readString(((Utf8) oldString733));
+                } else {
+                    charSequence733 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, charSequence733);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F733': "+ unionIndex733));
+            }
+        }
+        int unionIndex734 = (decoder.readIndex());
+        if (unionIndex734 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, null);
+        } else {
+            if (unionIndex734 == 1) {
+                Utf8 charSequence734;
+                Object oldString734 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(734);
+                if (oldString734 instanceof Utf8) {
+                    charSequence734 = (decoder).readString(((Utf8) oldString734));
+                } else {
+                    charSequence734 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, charSequence734);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F734': "+ unionIndex734));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex735 = (decoder.readIndex());
+        if (unionIndex735 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, null);
+        } else {
+            if (unionIndex735 == 1) {
+                Utf8 charSequence735;
+                Object oldString735 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(735);
+                if (oldString735 instanceof Utf8) {
+                    charSequence735 = (decoder).readString(((Utf8) oldString735));
+                } else {
+                    charSequence735 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, charSequence735);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F735': "+ unionIndex735));
+            }
+        }
+        int unionIndex736 = (decoder.readIndex());
+        if (unionIndex736 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, null);
+        } else {
+            if (unionIndex736 == 1) {
+                Utf8 charSequence736;
+                Object oldString736 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(736);
+                if (oldString736 instanceof Utf8) {
+                    charSequence736 = (decoder).readString(((Utf8) oldString736));
+                } else {
+                    charSequence736 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, charSequence736);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F736': "+ unionIndex736));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex737 = (decoder.readIndex());
+        if (unionIndex737 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, null);
+        } else {
+            if (unionIndex737 == 1) {
+                Utf8 charSequence737;
+                Object oldString737 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(737);
+                if (oldString737 instanceof Utf8) {
+                    charSequence737 = (decoder).readString(((Utf8) oldString737));
+                } else {
+                    charSequence737 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, charSequence737);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F737': "+ unionIndex737));
+            }
+        }
+        int unionIndex738 = (decoder.readIndex());
+        if (unionIndex738 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, null);
+        } else {
+            if (unionIndex738 == 1) {
+                Utf8 charSequence738;
+                Object oldString738 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(738);
+                if (oldString738 instanceof Utf8) {
+                    charSequence738 = (decoder).readString(((Utf8) oldString738));
+                } else {
+                    charSequence738 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, charSequence738);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F738': "+ unionIndex738));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex739 = (decoder.readIndex());
+        if (unionIndex739 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, null);
+        } else {
+            if (unionIndex739 == 1) {
+                Utf8 charSequence739;
+                Object oldString739 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(739);
+                if (oldString739 instanceof Utf8) {
+                    charSequence739 = (decoder).readString(((Utf8) oldString739));
+                } else {
+                    charSequence739 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, charSequence739);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F739': "+ unionIndex739));
+            }
+        }
+        int unionIndex740 = (decoder.readIndex());
+        if (unionIndex740 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, null);
+        } else {
+            if (unionIndex740 == 1) {
+                Utf8 charSequence740;
+                Object oldString740 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(740);
+                if (oldString740 instanceof Utf8) {
+                    charSequence740 = (decoder).readString(((Utf8) oldString740));
+                } else {
+                    charSequence740 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, charSequence740);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F740': "+ unionIndex740));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex741 = (decoder.readIndex());
+        if (unionIndex741 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, null);
+        } else {
+            if (unionIndex741 == 1) {
+                Utf8 charSequence741;
+                Object oldString741 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(741);
+                if (oldString741 instanceof Utf8) {
+                    charSequence741 = (decoder).readString(((Utf8) oldString741));
+                } else {
+                    charSequence741 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, charSequence741);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F741': "+ unionIndex741));
+            }
+        }
+        int unionIndex742 = (decoder.readIndex());
+        if (unionIndex742 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, null);
+        } else {
+            if (unionIndex742 == 1) {
+                Utf8 charSequence742;
+                Object oldString742 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(742);
+                if (oldString742 instanceof Utf8) {
+                    charSequence742 = (decoder).readString(((Utf8) oldString742));
+                } else {
+                    charSequence742 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, charSequence742);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F742': "+ unionIndex742));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex743 = (decoder.readIndex());
+        if (unionIndex743 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, null);
+        } else {
+            if (unionIndex743 == 1) {
+                Utf8 charSequence743;
+                Object oldString743 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(743);
+                if (oldString743 instanceof Utf8) {
+                    charSequence743 = (decoder).readString(((Utf8) oldString743));
+                } else {
+                    charSequence743 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, charSequence743);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F743': "+ unionIndex743));
+            }
+        }
+        int unionIndex744 = (decoder.readIndex());
+        if (unionIndex744 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, null);
+        } else {
+            if (unionIndex744 == 1) {
+                Utf8 charSequence744;
+                Object oldString744 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(744);
+                if (oldString744 instanceof Utf8) {
+                    charSequence744 = (decoder).readString(((Utf8) oldString744));
+                } else {
+                    charSequence744 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, charSequence744);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F744': "+ unionIndex744));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex745 = (decoder.readIndex());
+        if (unionIndex745 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, null);
+        } else {
+            if (unionIndex745 == 1) {
+                Utf8 charSequence745;
+                Object oldString745 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(745);
+                if (oldString745 instanceof Utf8) {
+                    charSequence745 = (decoder).readString(((Utf8) oldString745));
+                } else {
+                    charSequence745 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, charSequence745);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F745': "+ unionIndex745));
+            }
+        }
+        int unionIndex746 = (decoder.readIndex());
+        if (unionIndex746 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, null);
+        } else {
+            if (unionIndex746 == 1) {
+                Utf8 charSequence746;
+                Object oldString746 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(746);
+                if (oldString746 instanceof Utf8) {
+                    charSequence746 = (decoder).readString(((Utf8) oldString746));
+                } else {
+                    charSequence746 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, charSequence746);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F746': "+ unionIndex746));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex747 = (decoder.readIndex());
+        if (unionIndex747 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, null);
+        } else {
+            if (unionIndex747 == 1) {
+                Utf8 charSequence747;
+                Object oldString747 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(747);
+                if (oldString747 instanceof Utf8) {
+                    charSequence747 = (decoder).readString(((Utf8) oldString747));
+                } else {
+                    charSequence747 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, charSequence747);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F747': "+ unionIndex747));
+            }
+        }
+        int unionIndex748 = (decoder.readIndex());
+        if (unionIndex748 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, null);
+        } else {
+            if (unionIndex748 == 1) {
+                Utf8 charSequence748;
+                Object oldString748 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(748);
+                if (oldString748 instanceof Utf8) {
+                    charSequence748 = (decoder).readString(((Utf8) oldString748));
+                } else {
+                    charSequence748 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, charSequence748);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F748': "+ unionIndex748));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex749 = (decoder.readIndex());
+        if (unionIndex749 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, null);
+        } else {
+            if (unionIndex749 == 1) {
+                Utf8 charSequence749;
+                Object oldString749 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(749);
+                if (oldString749 instanceof Utf8) {
+                    charSequence749 = (decoder).readString(((Utf8) oldString749));
+                } else {
+                    charSequence749 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, charSequence749);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F749': "+ unionIndex749));
+            }
+        }
+        int unionIndex750 = (decoder.readIndex());
+        if (unionIndex750 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, null);
+        } else {
+            if (unionIndex750 == 1) {
+                Utf8 charSequence750;
+                Object oldString750 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(750);
+                if (oldString750 instanceof Utf8) {
+                    charSequence750 = (decoder).readString(((Utf8) oldString750));
+                } else {
+                    charSequence750 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, charSequence750);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F750': "+ unionIndex750));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex751 = (decoder.readIndex());
+        if (unionIndex751 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, null);
+        } else {
+            if (unionIndex751 == 1) {
+                Utf8 charSequence751;
+                Object oldString751 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(751);
+                if (oldString751 instanceof Utf8) {
+                    charSequence751 = (decoder).readString(((Utf8) oldString751));
+                } else {
+                    charSequence751 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, charSequence751);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F751': "+ unionIndex751));
+            }
+        }
+        int unionIndex752 = (decoder.readIndex());
+        if (unionIndex752 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, null);
+        } else {
+            if (unionIndex752 == 1) {
+                Utf8 charSequence752;
+                Object oldString752 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(752);
+                if (oldString752 instanceof Utf8) {
+                    charSequence752 = (decoder).readString(((Utf8) oldString752));
+                } else {
+                    charSequence752 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, charSequence752);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F752': "+ unionIndex752));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex753 = (decoder.readIndex());
+        if (unionIndex753 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, null);
+        } else {
+            if (unionIndex753 == 1) {
+                Utf8 charSequence753;
+                Object oldString753 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(753);
+                if (oldString753 instanceof Utf8) {
+                    charSequence753 = (decoder).readString(((Utf8) oldString753));
+                } else {
+                    charSequence753 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, charSequence753);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F753': "+ unionIndex753));
+            }
+        }
+        int unionIndex754 = (decoder.readIndex());
+        if (unionIndex754 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, null);
+        } else {
+            if (unionIndex754 == 1) {
+                Utf8 charSequence754;
+                Object oldString754 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(754);
+                if (oldString754 instanceof Utf8) {
+                    charSequence754 = (decoder).readString(((Utf8) oldString754));
+                } else {
+                    charSequence754 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, charSequence754);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F754': "+ unionIndex754));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex755 = (decoder.readIndex());
+        if (unionIndex755 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, null);
+        } else {
+            if (unionIndex755 == 1) {
+                Utf8 charSequence755;
+                Object oldString755 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(755);
+                if (oldString755 instanceof Utf8) {
+                    charSequence755 = (decoder).readString(((Utf8) oldString755));
+                } else {
+                    charSequence755 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, charSequence755);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F755': "+ unionIndex755));
+            }
+        }
+        int unionIndex756 = (decoder.readIndex());
+        if (unionIndex756 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, null);
+        } else {
+            if (unionIndex756 == 1) {
+                Utf8 charSequence756;
+                Object oldString756 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(756);
+                if (oldString756 instanceof Utf8) {
+                    charSequence756 = (decoder).readString(((Utf8) oldString756));
+                } else {
+                    charSequence756 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, charSequence756);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F756': "+ unionIndex756));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex757 = (decoder.readIndex());
+        if (unionIndex757 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, null);
+        } else {
+            if (unionIndex757 == 1) {
+                Utf8 charSequence757;
+                Object oldString757 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(757);
+                if (oldString757 instanceof Utf8) {
+                    charSequence757 = (decoder).readString(((Utf8) oldString757));
+                } else {
+                    charSequence757 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, charSequence757);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F757': "+ unionIndex757));
+            }
+        }
+        int unionIndex758 = (decoder.readIndex());
+        if (unionIndex758 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, null);
+        } else {
+            if (unionIndex758 == 1) {
+                Utf8 charSequence758;
+                Object oldString758 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(758);
+                if (oldString758 instanceof Utf8) {
+                    charSequence758 = (decoder).readString(((Utf8) oldString758));
+                } else {
+                    charSequence758 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, charSequence758);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F758': "+ unionIndex758));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex759 = (decoder.readIndex());
+        if (unionIndex759 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, null);
+        } else {
+            if (unionIndex759 == 1) {
+                Utf8 charSequence759;
+                Object oldString759 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(759);
+                if (oldString759 instanceof Utf8) {
+                    charSequence759 = (decoder).readString(((Utf8) oldString759));
+                } else {
+                    charSequence759 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, charSequence759);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F759': "+ unionIndex759));
+            }
+        }
+        int unionIndex760 = (decoder.readIndex());
+        if (unionIndex760 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, null);
+        } else {
+            if (unionIndex760 == 1) {
+                Utf8 charSequence760;
+                Object oldString760 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(760);
+                if (oldString760 instanceof Utf8) {
+                    charSequence760 = (decoder).readString(((Utf8) oldString760));
+                } else {
+                    charSequence760 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, charSequence760);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F760': "+ unionIndex760));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex761 = (decoder.readIndex());
+        if (unionIndex761 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, null);
+        } else {
+            if (unionIndex761 == 1) {
+                Utf8 charSequence761;
+                Object oldString761 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(761);
+                if (oldString761 instanceof Utf8) {
+                    charSequence761 = (decoder).readString(((Utf8) oldString761));
+                } else {
+                    charSequence761 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, charSequence761);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F761': "+ unionIndex761));
+            }
+        }
+        int unionIndex762 = (decoder.readIndex());
+        if (unionIndex762 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, null);
+        } else {
+            if (unionIndex762 == 1) {
+                Utf8 charSequence762;
+                Object oldString762 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(762);
+                if (oldString762 instanceof Utf8) {
+                    charSequence762 = (decoder).readString(((Utf8) oldString762));
+                } else {
+                    charSequence762 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, charSequence762);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F762': "+ unionIndex762));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex763 = (decoder.readIndex());
+        if (unionIndex763 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, null);
+        } else {
+            if (unionIndex763 == 1) {
+                Utf8 charSequence763;
+                Object oldString763 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(763);
+                if (oldString763 instanceof Utf8) {
+                    charSequence763 = (decoder).readString(((Utf8) oldString763));
+                } else {
+                    charSequence763 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, charSequence763);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F763': "+ unionIndex763));
+            }
+        }
+        int unionIndex764 = (decoder.readIndex());
+        if (unionIndex764 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, null);
+        } else {
+            if (unionIndex764 == 1) {
+                Utf8 charSequence764;
+                Object oldString764 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(764);
+                if (oldString764 instanceof Utf8) {
+                    charSequence764 = (decoder).readString(((Utf8) oldString764));
+                } else {
+                    charSequence764 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, charSequence764);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F764': "+ unionIndex764));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex765 = (decoder.readIndex());
+        if (unionIndex765 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, null);
+        } else {
+            if (unionIndex765 == 1) {
+                Utf8 charSequence765;
+                Object oldString765 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(765);
+                if (oldString765 instanceof Utf8) {
+                    charSequence765 = (decoder).readString(((Utf8) oldString765));
+                } else {
+                    charSequence765 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, charSequence765);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F765': "+ unionIndex765));
+            }
+        }
+        int unionIndex766 = (decoder.readIndex());
+        if (unionIndex766 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, null);
+        } else {
+            if (unionIndex766 == 1) {
+                Utf8 charSequence766;
+                Object oldString766 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(766);
+                if (oldString766 instanceof Utf8) {
+                    charSequence766 = (decoder).readString(((Utf8) oldString766));
+                } else {
+                    charSequence766 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, charSequence766);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F766': "+ unionIndex766));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex767 = (decoder.readIndex());
+        if (unionIndex767 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, null);
+        } else {
+            if (unionIndex767 == 1) {
+                Utf8 charSequence767;
+                Object oldString767 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(767);
+                if (oldString767 instanceof Utf8) {
+                    charSequence767 = (decoder).readString(((Utf8) oldString767));
+                } else {
+                    charSequence767 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, charSequence767);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F767': "+ unionIndex767));
+            }
+        }
+        int unionIndex768 = (decoder.readIndex());
+        if (unionIndex768 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, null);
+        } else {
+            if (unionIndex768 == 1) {
+                Utf8 charSequence768;
+                Object oldString768 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(768);
+                if (oldString768 instanceof Utf8) {
+                    charSequence768 = (decoder).readString(((Utf8) oldString768));
+                } else {
+                    charSequence768 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, charSequence768);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F768': "+ unionIndex768));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex769 = (decoder.readIndex());
+        if (unionIndex769 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, null);
+        } else {
+            if (unionIndex769 == 1) {
+                Utf8 charSequence769;
+                Object oldString769 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(769);
+                if (oldString769 instanceof Utf8) {
+                    charSequence769 = (decoder).readString(((Utf8) oldString769));
+                } else {
+                    charSequence769 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, charSequence769);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F769': "+ unionIndex769));
+            }
+        }
+        int unionIndex770 = (decoder.readIndex());
+        if (unionIndex770 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, null);
+        } else {
+            if (unionIndex770 == 1) {
+                Utf8 charSequence770;
+                Object oldString770 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(770);
+                if (oldString770 instanceof Utf8) {
+                    charSequence770 = (decoder).readString(((Utf8) oldString770));
+                } else {
+                    charSequence770 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, charSequence770);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F770': "+ unionIndex770));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex771 = (decoder.readIndex());
+        if (unionIndex771 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, null);
+        } else {
+            if (unionIndex771 == 1) {
+                Utf8 charSequence771;
+                Object oldString771 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(771);
+                if (oldString771 instanceof Utf8) {
+                    charSequence771 = (decoder).readString(((Utf8) oldString771));
+                } else {
+                    charSequence771 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, charSequence771);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F771': "+ unionIndex771));
+            }
+        }
+        int unionIndex772 = (decoder.readIndex());
+        if (unionIndex772 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, null);
+        } else {
+            if (unionIndex772 == 1) {
+                Utf8 charSequence772;
+                Object oldString772 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(772);
+                if (oldString772 instanceof Utf8) {
+                    charSequence772 = (decoder).readString(((Utf8) oldString772));
+                } else {
+                    charSequence772 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, charSequence772);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F772': "+ unionIndex772));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex773 = (decoder.readIndex());
+        if (unionIndex773 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, null);
+        } else {
+            if (unionIndex773 == 1) {
+                Utf8 charSequence773;
+                Object oldString773 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(773);
+                if (oldString773 instanceof Utf8) {
+                    charSequence773 = (decoder).readString(((Utf8) oldString773));
+                } else {
+                    charSequence773 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, charSequence773);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F773': "+ unionIndex773));
+            }
+        }
+        int unionIndex774 = (decoder.readIndex());
+        if (unionIndex774 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, null);
+        } else {
+            if (unionIndex774 == 1) {
+                Utf8 charSequence774;
+                Object oldString774 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(774);
+                if (oldString774 instanceof Utf8) {
+                    charSequence774 = (decoder).readString(((Utf8) oldString774));
+                } else {
+                    charSequence774 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, charSequence774);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F774': "+ unionIndex774));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex775 = (decoder.readIndex());
+        if (unionIndex775 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, null);
+        } else {
+            if (unionIndex775 == 1) {
+                Utf8 charSequence775;
+                Object oldString775 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(775);
+                if (oldString775 instanceof Utf8) {
+                    charSequence775 = (decoder).readString(((Utf8) oldString775));
+                } else {
+                    charSequence775 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, charSequence775);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F775': "+ unionIndex775));
+            }
+        }
+        int unionIndex776 = (decoder.readIndex());
+        if (unionIndex776 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, null);
+        } else {
+            if (unionIndex776 == 1) {
+                Utf8 charSequence776;
+                Object oldString776 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(776);
+                if (oldString776 instanceof Utf8) {
+                    charSequence776 = (decoder).readString(((Utf8) oldString776));
+                } else {
+                    charSequence776 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, charSequence776);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F776': "+ unionIndex776));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex777 = (decoder.readIndex());
+        if (unionIndex777 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, null);
+        } else {
+            if (unionIndex777 == 1) {
+                Utf8 charSequence777;
+                Object oldString777 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(777);
+                if (oldString777 instanceof Utf8) {
+                    charSequence777 = (decoder).readString(((Utf8) oldString777));
+                } else {
+                    charSequence777 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, charSequence777);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F777': "+ unionIndex777));
+            }
+        }
+        int unionIndex778 = (decoder.readIndex());
+        if (unionIndex778 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, null);
+        } else {
+            if (unionIndex778 == 1) {
+                Utf8 charSequence778;
+                Object oldString778 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(778);
+                if (oldString778 instanceof Utf8) {
+                    charSequence778 = (decoder).readString(((Utf8) oldString778));
+                } else {
+                    charSequence778 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, charSequence778);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F778': "+ unionIndex778));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex779 = (decoder.readIndex());
+        if (unionIndex779 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, null);
+        } else {
+            if (unionIndex779 == 1) {
+                Utf8 charSequence779;
+                Object oldString779 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(779);
+                if (oldString779 instanceof Utf8) {
+                    charSequence779 = (decoder).readString(((Utf8) oldString779));
+                } else {
+                    charSequence779 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, charSequence779);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F779': "+ unionIndex779));
+            }
+        }
+        int unionIndex780 = (decoder.readIndex());
+        if (unionIndex780 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, null);
+        } else {
+            if (unionIndex780 == 1) {
+                Utf8 charSequence780;
+                Object oldString780 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(780);
+                if (oldString780 instanceof Utf8) {
+                    charSequence780 = (decoder).readString(((Utf8) oldString780));
+                } else {
+                    charSequence780 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, charSequence780);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F780': "+ unionIndex780));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex781 = (decoder.readIndex());
+        if (unionIndex781 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, null);
+        } else {
+            if (unionIndex781 == 1) {
+                Utf8 charSequence781;
+                Object oldString781 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(781);
+                if (oldString781 instanceof Utf8) {
+                    charSequence781 = (decoder).readString(((Utf8) oldString781));
+                } else {
+                    charSequence781 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, charSequence781);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F781': "+ unionIndex781));
+            }
+        }
+        int unionIndex782 = (decoder.readIndex());
+        if (unionIndex782 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, null);
+        } else {
+            if (unionIndex782 == 1) {
+                Utf8 charSequence782;
+                Object oldString782 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(782);
+                if (oldString782 instanceof Utf8) {
+                    charSequence782 = (decoder).readString(((Utf8) oldString782));
+                } else {
+                    charSequence782 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, charSequence782);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F782': "+ unionIndex782));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex783 = (decoder.readIndex());
+        if (unionIndex783 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, null);
+        } else {
+            if (unionIndex783 == 1) {
+                Utf8 charSequence783;
+                Object oldString783 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(783);
+                if (oldString783 instanceof Utf8) {
+                    charSequence783 = (decoder).readString(((Utf8) oldString783));
+                } else {
+                    charSequence783 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, charSequence783);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F783': "+ unionIndex783));
+            }
+        }
+        int unionIndex784 = (decoder.readIndex());
+        if (unionIndex784 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, null);
+        } else {
+            if (unionIndex784 == 1) {
+                Utf8 charSequence784;
+                Object oldString784 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(784);
+                if (oldString784 instanceof Utf8) {
+                    charSequence784 = (decoder).readString(((Utf8) oldString784));
+                } else {
+                    charSequence784 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, charSequence784);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F784': "+ unionIndex784));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex785 = (decoder.readIndex());
+        if (unionIndex785 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, null);
+        } else {
+            if (unionIndex785 == 1) {
+                Utf8 charSequence785;
+                Object oldString785 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(785);
+                if (oldString785 instanceof Utf8) {
+                    charSequence785 = (decoder).readString(((Utf8) oldString785));
+                } else {
+                    charSequence785 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, charSequence785);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F785': "+ unionIndex785));
+            }
+        }
+        int unionIndex786 = (decoder.readIndex());
+        if (unionIndex786 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, null);
+        } else {
+            if (unionIndex786 == 1) {
+                Utf8 charSequence786;
+                Object oldString786 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(786);
+                if (oldString786 instanceof Utf8) {
+                    charSequence786 = (decoder).readString(((Utf8) oldString786));
+                } else {
+                    charSequence786 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, charSequence786);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F786': "+ unionIndex786));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex787 = (decoder.readIndex());
+        if (unionIndex787 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, null);
+        } else {
+            if (unionIndex787 == 1) {
+                Utf8 charSequence787;
+                Object oldString787 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(787);
+                if (oldString787 instanceof Utf8) {
+                    charSequence787 = (decoder).readString(((Utf8) oldString787));
+                } else {
+                    charSequence787 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, charSequence787);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F787': "+ unionIndex787));
+            }
+        }
+        int unionIndex788 = (decoder.readIndex());
+        if (unionIndex788 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, null);
+        } else {
+            if (unionIndex788 == 1) {
+                Utf8 charSequence788;
+                Object oldString788 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(788);
+                if (oldString788 instanceof Utf8) {
+                    charSequence788 = (decoder).readString(((Utf8) oldString788));
+                } else {
+                    charSequence788 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, charSequence788);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F788': "+ unionIndex788));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex789 = (decoder.readIndex());
+        if (unionIndex789 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, null);
+        } else {
+            if (unionIndex789 == 1) {
+                Utf8 charSequence789;
+                Object oldString789 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(789);
+                if (oldString789 instanceof Utf8) {
+                    charSequence789 = (decoder).readString(((Utf8) oldString789));
+                } else {
+                    charSequence789 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, charSequence789);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F789': "+ unionIndex789));
+            }
+        }
+        int unionIndex790 = (decoder.readIndex());
+        if (unionIndex790 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, null);
+        } else {
+            if (unionIndex790 == 1) {
+                Utf8 charSequence790;
+                Object oldString790 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(790);
+                if (oldString790 instanceof Utf8) {
+                    charSequence790 = (decoder).readString(((Utf8) oldString790));
+                } else {
+                    charSequence790 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, charSequence790);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F790': "+ unionIndex790));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex791 = (decoder.readIndex());
+        if (unionIndex791 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, null);
+        } else {
+            if (unionIndex791 == 1) {
+                Utf8 charSequence791;
+                Object oldString791 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(791);
+                if (oldString791 instanceof Utf8) {
+                    charSequence791 = (decoder).readString(((Utf8) oldString791));
+                } else {
+                    charSequence791 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, charSequence791);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F791': "+ unionIndex791));
+            }
+        }
+        int unionIndex792 = (decoder.readIndex());
+        if (unionIndex792 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, null);
+        } else {
+            if (unionIndex792 == 1) {
+                Utf8 charSequence792;
+                Object oldString792 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(792);
+                if (oldString792 instanceof Utf8) {
+                    charSequence792 = (decoder).readString(((Utf8) oldString792));
+                } else {
+                    charSequence792 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, charSequence792);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F792': "+ unionIndex792));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex793 = (decoder.readIndex());
+        if (unionIndex793 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, null);
+        } else {
+            if (unionIndex793 == 1) {
+                Utf8 charSequence793;
+                Object oldString793 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(793);
+                if (oldString793 instanceof Utf8) {
+                    charSequence793 = (decoder).readString(((Utf8) oldString793));
+                } else {
+                    charSequence793 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, charSequence793);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F793': "+ unionIndex793));
+            }
+        }
+        int unionIndex794 = (decoder.readIndex());
+        if (unionIndex794 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, null);
+        } else {
+            if (unionIndex794 == 1) {
+                Utf8 charSequence794;
+                Object oldString794 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(794);
+                if (oldString794 instanceof Utf8) {
+                    charSequence794 = (decoder).readString(((Utf8) oldString794));
+                } else {
+                    charSequence794 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, charSequence794);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F794': "+ unionIndex794));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex795 = (decoder.readIndex());
+        if (unionIndex795 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, null);
+        } else {
+            if (unionIndex795 == 1) {
+                Utf8 charSequence795;
+                Object oldString795 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(795);
+                if (oldString795 instanceof Utf8) {
+                    charSequence795 = (decoder).readString(((Utf8) oldString795));
+                } else {
+                    charSequence795 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, charSequence795);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F795': "+ unionIndex795));
+            }
+        }
+        int unionIndex796 = (decoder.readIndex());
+        if (unionIndex796 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, null);
+        } else {
+            if (unionIndex796 == 1) {
+                Utf8 charSequence796;
+                Object oldString796 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(796);
+                if (oldString796 instanceof Utf8) {
+                    charSequence796 = (decoder).readString(((Utf8) oldString796));
+                } else {
+                    charSequence796 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, charSequence796);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F796': "+ unionIndex796));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex797 = (decoder.readIndex());
+        if (unionIndex797 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, null);
+        } else {
+            if (unionIndex797 == 1) {
+                Utf8 charSequence797;
+                Object oldString797 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(797);
+                if (oldString797 instanceof Utf8) {
+                    charSequence797 = (decoder).readString(((Utf8) oldString797));
+                } else {
+                    charSequence797 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, charSequence797);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F797': "+ unionIndex797));
+            }
+        }
+        int unionIndex798 = (decoder.readIndex());
+        if (unionIndex798 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, null);
+        } else {
+            if (unionIndex798 == 1) {
+                Utf8 charSequence798;
+                Object oldString798 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(798);
+                if (oldString798 instanceof Utf8) {
+                    charSequence798 = (decoder).readString(((Utf8) oldString798));
+                } else {
+                    charSequence798 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, charSequence798);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F798': "+ unionIndex798));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex799 = (decoder.readIndex());
+        if (unionIndex799 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, null);
+        } else {
+            if (unionIndex799 == 1) {
+                Utf8 charSequence799;
+                Object oldString799 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(799);
+                if (oldString799 instanceof Utf8) {
+                    charSequence799 = (decoder).readString(((Utf8) oldString799));
+                } else {
+                    charSequence799 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, charSequence799);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F799': "+ unionIndex799));
+            }
+        }
+        int unionIndex800 = (decoder.readIndex());
+        if (unionIndex800 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, null);
+        } else {
+            if (unionIndex800 == 1) {
+                Utf8 charSequence800;
+                Object oldString800 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(800);
+                if (oldString800 instanceof Utf8) {
+                    charSequence800 = (decoder).readString(((Utf8) oldString800));
+                } else {
+                    charSequence800 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, charSequence800);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F800': "+ unionIndex800));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex801 = (decoder.readIndex());
+        if (unionIndex801 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, null);
+        } else {
+            if (unionIndex801 == 1) {
+                Utf8 charSequence801;
+                Object oldString801 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(801);
+                if (oldString801 instanceof Utf8) {
+                    charSequence801 = (decoder).readString(((Utf8) oldString801));
+                } else {
+                    charSequence801 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, charSequence801);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F801': "+ unionIndex801));
+            }
+        }
+        int unionIndex802 = (decoder.readIndex());
+        if (unionIndex802 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, null);
+        } else {
+            if (unionIndex802 == 1) {
+                Utf8 charSequence802;
+                Object oldString802 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(802);
+                if (oldString802 instanceof Utf8) {
+                    charSequence802 = (decoder).readString(((Utf8) oldString802));
+                } else {
+                    charSequence802 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, charSequence802);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F802': "+ unionIndex802));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex803 = (decoder.readIndex());
+        if (unionIndex803 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, null);
+        } else {
+            if (unionIndex803 == 1) {
+                Utf8 charSequence803;
+                Object oldString803 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(803);
+                if (oldString803 instanceof Utf8) {
+                    charSequence803 = (decoder).readString(((Utf8) oldString803));
+                } else {
+                    charSequence803 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, charSequence803);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F803': "+ unionIndex803));
+            }
+        }
+        int unionIndex804 = (decoder.readIndex());
+        if (unionIndex804 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, null);
+        } else {
+            if (unionIndex804 == 1) {
+                Utf8 charSequence804;
+                Object oldString804 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(804);
+                if (oldString804 instanceof Utf8) {
+                    charSequence804 = (decoder).readString(((Utf8) oldString804));
+                } else {
+                    charSequence804 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, charSequence804);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F804': "+ unionIndex804));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex805 = (decoder.readIndex());
+        if (unionIndex805 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, null);
+        } else {
+            if (unionIndex805 == 1) {
+                Utf8 charSequence805;
+                Object oldString805 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(805);
+                if (oldString805 instanceof Utf8) {
+                    charSequence805 = (decoder).readString(((Utf8) oldString805));
+                } else {
+                    charSequence805 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, charSequence805);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F805': "+ unionIndex805));
+            }
+        }
+        int unionIndex806 = (decoder.readIndex());
+        if (unionIndex806 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, null);
+        } else {
+            if (unionIndex806 == 1) {
+                Utf8 charSequence806;
+                Object oldString806 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(806);
+                if (oldString806 instanceof Utf8) {
+                    charSequence806 = (decoder).readString(((Utf8) oldString806));
+                } else {
+                    charSequence806 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, charSequence806);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F806': "+ unionIndex806));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex807 = (decoder.readIndex());
+        if (unionIndex807 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, null);
+        } else {
+            if (unionIndex807 == 1) {
+                Utf8 charSequence807;
+                Object oldString807 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(807);
+                if (oldString807 instanceof Utf8) {
+                    charSequence807 = (decoder).readString(((Utf8) oldString807));
+                } else {
+                    charSequence807 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, charSequence807);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F807': "+ unionIndex807));
+            }
+        }
+        int unionIndex808 = (decoder.readIndex());
+        if (unionIndex808 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, null);
+        } else {
+            if (unionIndex808 == 1) {
+                Utf8 charSequence808;
+                Object oldString808 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(808);
+                if (oldString808 instanceof Utf8) {
+                    charSequence808 = (decoder).readString(((Utf8) oldString808));
+                } else {
+                    charSequence808 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, charSequence808);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F808': "+ unionIndex808));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex809 = (decoder.readIndex());
+        if (unionIndex809 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, null);
+        } else {
+            if (unionIndex809 == 1) {
+                Utf8 charSequence809;
+                Object oldString809 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(809);
+                if (oldString809 instanceof Utf8) {
+                    charSequence809 = (decoder).readString(((Utf8) oldString809));
+                } else {
+                    charSequence809 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, charSequence809);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F809': "+ unionIndex809));
+            }
+        }
+        int unionIndex810 = (decoder.readIndex());
+        if (unionIndex810 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, null);
+        } else {
+            if (unionIndex810 == 1) {
+                Utf8 charSequence810;
+                Object oldString810 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(810);
+                if (oldString810 instanceof Utf8) {
+                    charSequence810 = (decoder).readString(((Utf8) oldString810));
+                } else {
+                    charSequence810 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, charSequence810);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F810': "+ unionIndex810));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex811 = (decoder.readIndex());
+        if (unionIndex811 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, null);
+        } else {
+            if (unionIndex811 == 1) {
+                Utf8 charSequence811;
+                Object oldString811 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(811);
+                if (oldString811 instanceof Utf8) {
+                    charSequence811 = (decoder).readString(((Utf8) oldString811));
+                } else {
+                    charSequence811 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, charSequence811);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F811': "+ unionIndex811));
+            }
+        }
+        int unionIndex812 = (decoder.readIndex());
+        if (unionIndex812 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, null);
+        } else {
+            if (unionIndex812 == 1) {
+                Utf8 charSequence812;
+                Object oldString812 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(812);
+                if (oldString812 instanceof Utf8) {
+                    charSequence812 = (decoder).readString(((Utf8) oldString812));
+                } else {
+                    charSequence812 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, charSequence812);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F812': "+ unionIndex812));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex813 = (decoder.readIndex());
+        if (unionIndex813 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, null);
+        } else {
+            if (unionIndex813 == 1) {
+                Utf8 charSequence813;
+                Object oldString813 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(813);
+                if (oldString813 instanceof Utf8) {
+                    charSequence813 = (decoder).readString(((Utf8) oldString813));
+                } else {
+                    charSequence813 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, charSequence813);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F813': "+ unionIndex813));
+            }
+        }
+        int unionIndex814 = (decoder.readIndex());
+        if (unionIndex814 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, null);
+        } else {
+            if (unionIndex814 == 1) {
+                Utf8 charSequence814;
+                Object oldString814 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(814);
+                if (oldString814 instanceof Utf8) {
+                    charSequence814 = (decoder).readString(((Utf8) oldString814));
+                } else {
+                    charSequence814 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, charSequence814);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F814': "+ unionIndex814));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex815 = (decoder.readIndex());
+        if (unionIndex815 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, null);
+        } else {
+            if (unionIndex815 == 1) {
+                Utf8 charSequence815;
+                Object oldString815 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(815);
+                if (oldString815 instanceof Utf8) {
+                    charSequence815 = (decoder).readString(((Utf8) oldString815));
+                } else {
+                    charSequence815 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, charSequence815);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F815': "+ unionIndex815));
+            }
+        }
+        int unionIndex816 = (decoder.readIndex());
+        if (unionIndex816 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, null);
+        } else {
+            if (unionIndex816 == 1) {
+                Utf8 charSequence816;
+                Object oldString816 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(816);
+                if (oldString816 instanceof Utf8) {
+                    charSequence816 = (decoder).readString(((Utf8) oldString816));
+                } else {
+                    charSequence816 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, charSequence816);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F816': "+ unionIndex816));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex817 = (decoder.readIndex());
+        if (unionIndex817 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, null);
+        } else {
+            if (unionIndex817 == 1) {
+                Utf8 charSequence817;
+                Object oldString817 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(817);
+                if (oldString817 instanceof Utf8) {
+                    charSequence817 = (decoder).readString(((Utf8) oldString817));
+                } else {
+                    charSequence817 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, charSequence817);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F817': "+ unionIndex817));
+            }
+        }
+        int unionIndex818 = (decoder.readIndex());
+        if (unionIndex818 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, null);
+        } else {
+            if (unionIndex818 == 1) {
+                Utf8 charSequence818;
+                Object oldString818 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(818);
+                if (oldString818 instanceof Utf8) {
+                    charSequence818 = (decoder).readString(((Utf8) oldString818));
+                } else {
+                    charSequence818 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, charSequence818);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F818': "+ unionIndex818));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex819 = (decoder.readIndex());
+        if (unionIndex819 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, null);
+        } else {
+            if (unionIndex819 == 1) {
+                Utf8 charSequence819;
+                Object oldString819 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(819);
+                if (oldString819 instanceof Utf8) {
+                    charSequence819 = (decoder).readString(((Utf8) oldString819));
+                } else {
+                    charSequence819 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, charSequence819);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F819': "+ unionIndex819));
+            }
+        }
+        int unionIndex820 = (decoder.readIndex());
+        if (unionIndex820 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, null);
+        } else {
+            if (unionIndex820 == 1) {
+                Utf8 charSequence820;
+                Object oldString820 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(820);
+                if (oldString820 instanceof Utf8) {
+                    charSequence820 = (decoder).readString(((Utf8) oldString820));
+                } else {
+                    charSequence820 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, charSequence820);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F820': "+ unionIndex820));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex821 = (decoder.readIndex());
+        if (unionIndex821 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, null);
+        } else {
+            if (unionIndex821 == 1) {
+                Utf8 charSequence821;
+                Object oldString821 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(821);
+                if (oldString821 instanceof Utf8) {
+                    charSequence821 = (decoder).readString(((Utf8) oldString821));
+                } else {
+                    charSequence821 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, charSequence821);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F821': "+ unionIndex821));
+            }
+        }
+        int unionIndex822 = (decoder.readIndex());
+        if (unionIndex822 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, null);
+        } else {
+            if (unionIndex822 == 1) {
+                Utf8 charSequence822;
+                Object oldString822 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(822);
+                if (oldString822 instanceof Utf8) {
+                    charSequence822 = (decoder).readString(((Utf8) oldString822));
+                } else {
+                    charSequence822 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, charSequence822);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F822': "+ unionIndex822));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex823 = (decoder.readIndex());
+        if (unionIndex823 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, null);
+        } else {
+            if (unionIndex823 == 1) {
+                Utf8 charSequence823;
+                Object oldString823 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(823);
+                if (oldString823 instanceof Utf8) {
+                    charSequence823 = (decoder).readString(((Utf8) oldString823));
+                } else {
+                    charSequence823 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, charSequence823);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F823': "+ unionIndex823));
+            }
+        }
+        int unionIndex824 = (decoder.readIndex());
+        if (unionIndex824 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, null);
+        } else {
+            if (unionIndex824 == 1) {
+                Utf8 charSequence824;
+                Object oldString824 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(824);
+                if (oldString824 instanceof Utf8) {
+                    charSequence824 = (decoder).readString(((Utf8) oldString824));
+                } else {
+                    charSequence824 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, charSequence824);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F824': "+ unionIndex824));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex825 = (decoder.readIndex());
+        if (unionIndex825 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, null);
+        } else {
+            if (unionIndex825 == 1) {
+                Utf8 charSequence825;
+                Object oldString825 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(825);
+                if (oldString825 instanceof Utf8) {
+                    charSequence825 = (decoder).readString(((Utf8) oldString825));
+                } else {
+                    charSequence825 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, charSequence825);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F825': "+ unionIndex825));
+            }
+        }
+        int unionIndex826 = (decoder.readIndex());
+        if (unionIndex826 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, null);
+        } else {
+            if (unionIndex826 == 1) {
+                Utf8 charSequence826;
+                Object oldString826 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(826);
+                if (oldString826 instanceof Utf8) {
+                    charSequence826 = (decoder).readString(((Utf8) oldString826));
+                } else {
+                    charSequence826 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, charSequence826);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F826': "+ unionIndex826));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex827 = (decoder.readIndex());
+        if (unionIndex827 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, null);
+        } else {
+            if (unionIndex827 == 1) {
+                Utf8 charSequence827;
+                Object oldString827 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(827);
+                if (oldString827 instanceof Utf8) {
+                    charSequence827 = (decoder).readString(((Utf8) oldString827));
+                } else {
+                    charSequence827 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, charSequence827);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F827': "+ unionIndex827));
+            }
+        }
+        int unionIndex828 = (decoder.readIndex());
+        if (unionIndex828 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, null);
+        } else {
+            if (unionIndex828 == 1) {
+                Utf8 charSequence828;
+                Object oldString828 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(828);
+                if (oldString828 instanceof Utf8) {
+                    charSequence828 = (decoder).readString(((Utf8) oldString828));
+                } else {
+                    charSequence828 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, charSequence828);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F828': "+ unionIndex828));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex829 = (decoder.readIndex());
+        if (unionIndex829 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, null);
+        } else {
+            if (unionIndex829 == 1) {
+                Utf8 charSequence829;
+                Object oldString829 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(829);
+                if (oldString829 instanceof Utf8) {
+                    charSequence829 = (decoder).readString(((Utf8) oldString829));
+                } else {
+                    charSequence829 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, charSequence829);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F829': "+ unionIndex829));
+            }
+        }
+        int unionIndex830 = (decoder.readIndex());
+        if (unionIndex830 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, null);
+        } else {
+            if (unionIndex830 == 1) {
+                Utf8 charSequence830;
+                Object oldString830 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(830);
+                if (oldString830 instanceof Utf8) {
+                    charSequence830 = (decoder).readString(((Utf8) oldString830));
+                } else {
+                    charSequence830 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, charSequence830);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F830': "+ unionIndex830));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex831 = (decoder.readIndex());
+        if (unionIndex831 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, null);
+        } else {
+            if (unionIndex831 == 1) {
+                Utf8 charSequence831;
+                Object oldString831 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(831);
+                if (oldString831 instanceof Utf8) {
+                    charSequence831 = (decoder).readString(((Utf8) oldString831));
+                } else {
+                    charSequence831 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, charSequence831);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F831': "+ unionIndex831));
+            }
+        }
+        int unionIndex832 = (decoder.readIndex());
+        if (unionIndex832 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, null);
+        } else {
+            if (unionIndex832 == 1) {
+                Utf8 charSequence832;
+                Object oldString832 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(832);
+                if (oldString832 instanceof Utf8) {
+                    charSequence832 = (decoder).readString(((Utf8) oldString832));
+                } else {
+                    charSequence832 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, charSequence832);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F832': "+ unionIndex832));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex833 = (decoder.readIndex());
+        if (unionIndex833 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, null);
+        } else {
+            if (unionIndex833 == 1) {
+                Utf8 charSequence833;
+                Object oldString833 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(833);
+                if (oldString833 instanceof Utf8) {
+                    charSequence833 = (decoder).readString(((Utf8) oldString833));
+                } else {
+                    charSequence833 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, charSequence833);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F833': "+ unionIndex833));
+            }
+        }
+        int unionIndex834 = (decoder.readIndex());
+        if (unionIndex834 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, null);
+        } else {
+            if (unionIndex834 == 1) {
+                Utf8 charSequence834;
+                Object oldString834 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(834);
+                if (oldString834 instanceof Utf8) {
+                    charSequence834 = (decoder).readString(((Utf8) oldString834));
+                } else {
+                    charSequence834 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, charSequence834);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F834': "+ unionIndex834));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex835 = (decoder.readIndex());
+        if (unionIndex835 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, null);
+        } else {
+            if (unionIndex835 == 1) {
+                Utf8 charSequence835;
+                Object oldString835 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(835);
+                if (oldString835 instanceof Utf8) {
+                    charSequence835 = (decoder).readString(((Utf8) oldString835));
+                } else {
+                    charSequence835 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, charSequence835);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F835': "+ unionIndex835));
+            }
+        }
+        int unionIndex836 = (decoder.readIndex());
+        if (unionIndex836 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, null);
+        } else {
+            if (unionIndex836 == 1) {
+                Utf8 charSequence836;
+                Object oldString836 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(836);
+                if (oldString836 instanceof Utf8) {
+                    charSequence836 = (decoder).readString(((Utf8) oldString836));
+                } else {
+                    charSequence836 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, charSequence836);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F836': "+ unionIndex836));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex837 = (decoder.readIndex());
+        if (unionIndex837 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, null);
+        } else {
+            if (unionIndex837 == 1) {
+                Utf8 charSequence837;
+                Object oldString837 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(837);
+                if (oldString837 instanceof Utf8) {
+                    charSequence837 = (decoder).readString(((Utf8) oldString837));
+                } else {
+                    charSequence837 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, charSequence837);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F837': "+ unionIndex837));
+            }
+        }
+        int unionIndex838 = (decoder.readIndex());
+        if (unionIndex838 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, null);
+        } else {
+            if (unionIndex838 == 1) {
+                Utf8 charSequence838;
+                Object oldString838 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(838);
+                if (oldString838 instanceof Utf8) {
+                    charSequence838 = (decoder).readString(((Utf8) oldString838));
+                } else {
+                    charSequence838 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, charSequence838);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F838': "+ unionIndex838));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex839 = (decoder.readIndex());
+        if (unionIndex839 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, null);
+        } else {
+            if (unionIndex839 == 1) {
+                Utf8 charSequence839;
+                Object oldString839 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(839);
+                if (oldString839 instanceof Utf8) {
+                    charSequence839 = (decoder).readString(((Utf8) oldString839));
+                } else {
+                    charSequence839 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, charSequence839);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F839': "+ unionIndex839));
+            }
+        }
+        int unionIndex840 = (decoder.readIndex());
+        if (unionIndex840 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, null);
+        } else {
+            if (unionIndex840 == 1) {
+                Utf8 charSequence840;
+                Object oldString840 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(840);
+                if (oldString840 instanceof Utf8) {
+                    charSequence840 = (decoder).readString(((Utf8) oldString840));
+                } else {
+                    charSequence840 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, charSequence840);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F840': "+ unionIndex840));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex841 = (decoder.readIndex());
+        if (unionIndex841 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, null);
+        } else {
+            if (unionIndex841 == 1) {
+                Utf8 charSequence841;
+                Object oldString841 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(841);
+                if (oldString841 instanceof Utf8) {
+                    charSequence841 = (decoder).readString(((Utf8) oldString841));
+                } else {
+                    charSequence841 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, charSequence841);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F841': "+ unionIndex841));
+            }
+        }
+        int unionIndex842 = (decoder.readIndex());
+        if (unionIndex842 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, null);
+        } else {
+            if (unionIndex842 == 1) {
+                Utf8 charSequence842;
+                Object oldString842 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(842);
+                if (oldString842 instanceof Utf8) {
+                    charSequence842 = (decoder).readString(((Utf8) oldString842));
+                } else {
+                    charSequence842 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, charSequence842);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F842': "+ unionIndex842));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex843 = (decoder.readIndex());
+        if (unionIndex843 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, null);
+        } else {
+            if (unionIndex843 == 1) {
+                Utf8 charSequence843;
+                Object oldString843 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(843);
+                if (oldString843 instanceof Utf8) {
+                    charSequence843 = (decoder).readString(((Utf8) oldString843));
+                } else {
+                    charSequence843 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, charSequence843);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F843': "+ unionIndex843));
+            }
+        }
+        int unionIndex844 = (decoder.readIndex());
+        if (unionIndex844 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, null);
+        } else {
+            if (unionIndex844 == 1) {
+                Utf8 charSequence844;
+                Object oldString844 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(844);
+                if (oldString844 instanceof Utf8) {
+                    charSequence844 = (decoder).readString(((Utf8) oldString844));
+                } else {
+                    charSequence844 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, charSequence844);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F844': "+ unionIndex844));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex845 = (decoder.readIndex());
+        if (unionIndex845 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, null);
+        } else {
+            if (unionIndex845 == 1) {
+                Utf8 charSequence845;
+                Object oldString845 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(845);
+                if (oldString845 instanceof Utf8) {
+                    charSequence845 = (decoder).readString(((Utf8) oldString845));
+                } else {
+                    charSequence845 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, charSequence845);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F845': "+ unionIndex845));
+            }
+        }
+        int unionIndex846 = (decoder.readIndex());
+        if (unionIndex846 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, null);
+        } else {
+            if (unionIndex846 == 1) {
+                Utf8 charSequence846;
+                Object oldString846 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(846);
+                if (oldString846 instanceof Utf8) {
+                    charSequence846 = (decoder).readString(((Utf8) oldString846));
+                } else {
+                    charSequence846 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, charSequence846);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F846': "+ unionIndex846));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex847 = (decoder.readIndex());
+        if (unionIndex847 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, null);
+        } else {
+            if (unionIndex847 == 1) {
+                Utf8 charSequence847;
+                Object oldString847 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(847);
+                if (oldString847 instanceof Utf8) {
+                    charSequence847 = (decoder).readString(((Utf8) oldString847));
+                } else {
+                    charSequence847 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, charSequence847);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F847': "+ unionIndex847));
+            }
+        }
+        int unionIndex848 = (decoder.readIndex());
+        if (unionIndex848 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, null);
+        } else {
+            if (unionIndex848 == 1) {
+                Utf8 charSequence848;
+                Object oldString848 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(848);
+                if (oldString848 instanceof Utf8) {
+                    charSequence848 = (decoder).readString(((Utf8) oldString848));
+                } else {
+                    charSequence848 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, charSequence848);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F848': "+ unionIndex848));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex849 = (decoder.readIndex());
+        if (unionIndex849 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, null);
+        } else {
+            if (unionIndex849 == 1) {
+                Utf8 charSequence849;
+                Object oldString849 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(849);
+                if (oldString849 instanceof Utf8) {
+                    charSequence849 = (decoder).readString(((Utf8) oldString849));
+                } else {
+                    charSequence849 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, charSequence849);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F849': "+ unionIndex849));
+            }
+        }
+        int unionIndex850 = (decoder.readIndex());
+        if (unionIndex850 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, null);
+        } else {
+            if (unionIndex850 == 1) {
+                Utf8 charSequence850;
+                Object oldString850 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(850);
+                if (oldString850 instanceof Utf8) {
+                    charSequence850 = (decoder).readString(((Utf8) oldString850));
+                } else {
+                    charSequence850 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, charSequence850);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F850': "+ unionIndex850));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex851 = (decoder.readIndex());
+        if (unionIndex851 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, null);
+        } else {
+            if (unionIndex851 == 1) {
+                Utf8 charSequence851;
+                Object oldString851 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(851);
+                if (oldString851 instanceof Utf8) {
+                    charSequence851 = (decoder).readString(((Utf8) oldString851));
+                } else {
+                    charSequence851 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, charSequence851);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F851': "+ unionIndex851));
+            }
+        }
+        int unionIndex852 = (decoder.readIndex());
+        if (unionIndex852 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, null);
+        } else {
+            if (unionIndex852 == 1) {
+                Utf8 charSequence852;
+                Object oldString852 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(852);
+                if (oldString852 instanceof Utf8) {
+                    charSequence852 = (decoder).readString(((Utf8) oldString852));
+                } else {
+                    charSequence852 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, charSequence852);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F852': "+ unionIndex852));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex853 = (decoder.readIndex());
+        if (unionIndex853 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, null);
+        } else {
+            if (unionIndex853 == 1) {
+                Utf8 charSequence853;
+                Object oldString853 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(853);
+                if (oldString853 instanceof Utf8) {
+                    charSequence853 = (decoder).readString(((Utf8) oldString853));
+                } else {
+                    charSequence853 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, charSequence853);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F853': "+ unionIndex853));
+            }
+        }
+        int unionIndex854 = (decoder.readIndex());
+        if (unionIndex854 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, null);
+        } else {
+            if (unionIndex854 == 1) {
+                Utf8 charSequence854;
+                Object oldString854 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(854);
+                if (oldString854 instanceof Utf8) {
+                    charSequence854 = (decoder).readString(((Utf8) oldString854));
+                } else {
+                    charSequence854 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, charSequence854);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F854': "+ unionIndex854));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex855 = (decoder.readIndex());
+        if (unionIndex855 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, null);
+        } else {
+            if (unionIndex855 == 1) {
+                Utf8 charSequence855;
+                Object oldString855 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(855);
+                if (oldString855 instanceof Utf8) {
+                    charSequence855 = (decoder).readString(((Utf8) oldString855));
+                } else {
+                    charSequence855 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, charSequence855);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F855': "+ unionIndex855));
+            }
+        }
+        int unionIndex856 = (decoder.readIndex());
+        if (unionIndex856 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, null);
+        } else {
+            if (unionIndex856 == 1) {
+                Utf8 charSequence856;
+                Object oldString856 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(856);
+                if (oldString856 instanceof Utf8) {
+                    charSequence856 = (decoder).readString(((Utf8) oldString856));
+                } else {
+                    charSequence856 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, charSequence856);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F856': "+ unionIndex856));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex857 = (decoder.readIndex());
+        if (unionIndex857 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, null);
+        } else {
+            if (unionIndex857 == 1) {
+                Utf8 charSequence857;
+                Object oldString857 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(857);
+                if (oldString857 instanceof Utf8) {
+                    charSequence857 = (decoder).readString(((Utf8) oldString857));
+                } else {
+                    charSequence857 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, charSequence857);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F857': "+ unionIndex857));
+            }
+        }
+        int unionIndex858 = (decoder.readIndex());
+        if (unionIndex858 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, null);
+        } else {
+            if (unionIndex858 == 1) {
+                Utf8 charSequence858;
+                Object oldString858 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(858);
+                if (oldString858 instanceof Utf8) {
+                    charSequence858 = (decoder).readString(((Utf8) oldString858));
+                } else {
+                    charSequence858 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, charSequence858);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F858': "+ unionIndex858));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex859 = (decoder.readIndex());
+        if (unionIndex859 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, null);
+        } else {
+            if (unionIndex859 == 1) {
+                Utf8 charSequence859;
+                Object oldString859 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(859);
+                if (oldString859 instanceof Utf8) {
+                    charSequence859 = (decoder).readString(((Utf8) oldString859));
+                } else {
+                    charSequence859 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, charSequence859);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F859': "+ unionIndex859));
+            }
+        }
+        int unionIndex860 = (decoder.readIndex());
+        if (unionIndex860 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, null);
+        } else {
+            if (unionIndex860 == 1) {
+                Utf8 charSequence860;
+                Object oldString860 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(860);
+                if (oldString860 instanceof Utf8) {
+                    charSequence860 = (decoder).readString(((Utf8) oldString860));
+                } else {
+                    charSequence860 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, charSequence860);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F860': "+ unionIndex860));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex861 = (decoder.readIndex());
+        if (unionIndex861 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, null);
+        } else {
+            if (unionIndex861 == 1) {
+                Utf8 charSequence861;
+                Object oldString861 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(861);
+                if (oldString861 instanceof Utf8) {
+                    charSequence861 = (decoder).readString(((Utf8) oldString861));
+                } else {
+                    charSequence861 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, charSequence861);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F861': "+ unionIndex861));
+            }
+        }
+        int unionIndex862 = (decoder.readIndex());
+        if (unionIndex862 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, null);
+        } else {
+            if (unionIndex862 == 1) {
+                Utf8 charSequence862;
+                Object oldString862 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(862);
+                if (oldString862 instanceof Utf8) {
+                    charSequence862 = (decoder).readString(((Utf8) oldString862));
+                } else {
+                    charSequence862 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, charSequence862);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F862': "+ unionIndex862));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex863 = (decoder.readIndex());
+        if (unionIndex863 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, null);
+        } else {
+            if (unionIndex863 == 1) {
+                Utf8 charSequence863;
+                Object oldString863 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(863);
+                if (oldString863 instanceof Utf8) {
+                    charSequence863 = (decoder).readString(((Utf8) oldString863));
+                } else {
+                    charSequence863 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, charSequence863);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F863': "+ unionIndex863));
+            }
+        }
+        int unionIndex864 = (decoder.readIndex());
+        if (unionIndex864 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, null);
+        } else {
+            if (unionIndex864 == 1) {
+                Utf8 charSequence864;
+                Object oldString864 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(864);
+                if (oldString864 instanceof Utf8) {
+                    charSequence864 = (decoder).readString(((Utf8) oldString864));
+                } else {
+                    charSequence864 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, charSequence864);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F864': "+ unionIndex864));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex865 = (decoder.readIndex());
+        if (unionIndex865 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, null);
+        } else {
+            if (unionIndex865 == 1) {
+                Utf8 charSequence865;
+                Object oldString865 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(865);
+                if (oldString865 instanceof Utf8) {
+                    charSequence865 = (decoder).readString(((Utf8) oldString865));
+                } else {
+                    charSequence865 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, charSequence865);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F865': "+ unionIndex865));
+            }
+        }
+        int unionIndex866 = (decoder.readIndex());
+        if (unionIndex866 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, null);
+        } else {
+            if (unionIndex866 == 1) {
+                Utf8 charSequence866;
+                Object oldString866 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(866);
+                if (oldString866 instanceof Utf8) {
+                    charSequence866 = (decoder).readString(((Utf8) oldString866));
+                } else {
+                    charSequence866 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, charSequence866);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F866': "+ unionIndex866));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex867 = (decoder.readIndex());
+        if (unionIndex867 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, null);
+        } else {
+            if (unionIndex867 == 1) {
+                Utf8 charSequence867;
+                Object oldString867 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(867);
+                if (oldString867 instanceof Utf8) {
+                    charSequence867 = (decoder).readString(((Utf8) oldString867));
+                } else {
+                    charSequence867 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, charSequence867);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F867': "+ unionIndex867));
+            }
+        }
+        int unionIndex868 = (decoder.readIndex());
+        if (unionIndex868 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, null);
+        } else {
+            if (unionIndex868 == 1) {
+                Utf8 charSequence868;
+                Object oldString868 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(868);
+                if (oldString868 instanceof Utf8) {
+                    charSequence868 = (decoder).readString(((Utf8) oldString868));
+                } else {
+                    charSequence868 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, charSequence868);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F868': "+ unionIndex868));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex869 = (decoder.readIndex());
+        if (unionIndex869 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, null);
+        } else {
+            if (unionIndex869 == 1) {
+                Utf8 charSequence869;
+                Object oldString869 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(869);
+                if (oldString869 instanceof Utf8) {
+                    charSequence869 = (decoder).readString(((Utf8) oldString869));
+                } else {
+                    charSequence869 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, charSequence869);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F869': "+ unionIndex869));
+            }
+        }
+        int unionIndex870 = (decoder.readIndex());
+        if (unionIndex870 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, null);
+        } else {
+            if (unionIndex870 == 1) {
+                Utf8 charSequence870;
+                Object oldString870 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(870);
+                if (oldString870 instanceof Utf8) {
+                    charSequence870 = (decoder).readString(((Utf8) oldString870));
+                } else {
+                    charSequence870 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, charSequence870);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F870': "+ unionIndex870));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex871 = (decoder.readIndex());
+        if (unionIndex871 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, null);
+        } else {
+            if (unionIndex871 == 1) {
+                Utf8 charSequence871;
+                Object oldString871 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(871);
+                if (oldString871 instanceof Utf8) {
+                    charSequence871 = (decoder).readString(((Utf8) oldString871));
+                } else {
+                    charSequence871 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, charSequence871);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F871': "+ unionIndex871));
+            }
+        }
+        int unionIndex872 = (decoder.readIndex());
+        if (unionIndex872 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, null);
+        } else {
+            if (unionIndex872 == 1) {
+                Utf8 charSequence872;
+                Object oldString872 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(872);
+                if (oldString872 instanceof Utf8) {
+                    charSequence872 = (decoder).readString(((Utf8) oldString872));
+                } else {
+                    charSequence872 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, charSequence872);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F872': "+ unionIndex872));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex873 = (decoder.readIndex());
+        if (unionIndex873 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, null);
+        } else {
+            if (unionIndex873 == 1) {
+                Utf8 charSequence873;
+                Object oldString873 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(873);
+                if (oldString873 instanceof Utf8) {
+                    charSequence873 = (decoder).readString(((Utf8) oldString873));
+                } else {
+                    charSequence873 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, charSequence873);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F873': "+ unionIndex873));
+            }
+        }
+        int unionIndex874 = (decoder.readIndex());
+        if (unionIndex874 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, null);
+        } else {
+            if (unionIndex874 == 1) {
+                Utf8 charSequence874;
+                Object oldString874 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(874);
+                if (oldString874 instanceof Utf8) {
+                    charSequence874 = (decoder).readString(((Utf8) oldString874));
+                } else {
+                    charSequence874 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, charSequence874);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F874': "+ unionIndex874));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex875 = (decoder.readIndex());
+        if (unionIndex875 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, null);
+        } else {
+            if (unionIndex875 == 1) {
+                Utf8 charSequence875;
+                Object oldString875 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(875);
+                if (oldString875 instanceof Utf8) {
+                    charSequence875 = (decoder).readString(((Utf8) oldString875));
+                } else {
+                    charSequence875 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, charSequence875);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F875': "+ unionIndex875));
+            }
+        }
+        int unionIndex876 = (decoder.readIndex());
+        if (unionIndex876 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, null);
+        } else {
+            if (unionIndex876 == 1) {
+                Utf8 charSequence876;
+                Object oldString876 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(876);
+                if (oldString876 instanceof Utf8) {
+                    charSequence876 = (decoder).readString(((Utf8) oldString876));
+                } else {
+                    charSequence876 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, charSequence876);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F876': "+ unionIndex876));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex877 = (decoder.readIndex());
+        if (unionIndex877 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, null);
+        } else {
+            if (unionIndex877 == 1) {
+                Utf8 charSequence877;
+                Object oldString877 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(877);
+                if (oldString877 instanceof Utf8) {
+                    charSequence877 = (decoder).readString(((Utf8) oldString877));
+                } else {
+                    charSequence877 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, charSequence877);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F877': "+ unionIndex877));
+            }
+        }
+        int unionIndex878 = (decoder.readIndex());
+        if (unionIndex878 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, null);
+        } else {
+            if (unionIndex878 == 1) {
+                Utf8 charSequence878;
+                Object oldString878 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(878);
+                if (oldString878 instanceof Utf8) {
+                    charSequence878 = (decoder).readString(((Utf8) oldString878));
+                } else {
+                    charSequence878 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, charSequence878);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F878': "+ unionIndex878));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex879 = (decoder.readIndex());
+        if (unionIndex879 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, null);
+        } else {
+            if (unionIndex879 == 1) {
+                Utf8 charSequence879;
+                Object oldString879 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(879);
+                if (oldString879 instanceof Utf8) {
+                    charSequence879 = (decoder).readString(((Utf8) oldString879));
+                } else {
+                    charSequence879 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, charSequence879);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F879': "+ unionIndex879));
+            }
+        }
+        int unionIndex880 = (decoder.readIndex());
+        if (unionIndex880 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, null);
+        } else {
+            if (unionIndex880 == 1) {
+                Utf8 charSequence880;
+                Object oldString880 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(880);
+                if (oldString880 instanceof Utf8) {
+                    charSequence880 = (decoder).readString(((Utf8) oldString880));
+                } else {
+                    charSequence880 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, charSequence880);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F880': "+ unionIndex880));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex881 = (decoder.readIndex());
+        if (unionIndex881 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, null);
+        } else {
+            if (unionIndex881 == 1) {
+                Utf8 charSequence881;
+                Object oldString881 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(881);
+                if (oldString881 instanceof Utf8) {
+                    charSequence881 = (decoder).readString(((Utf8) oldString881));
+                } else {
+                    charSequence881 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, charSequence881);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F881': "+ unionIndex881));
+            }
+        }
+        int unionIndex882 = (decoder.readIndex());
+        if (unionIndex882 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, null);
+        } else {
+            if (unionIndex882 == 1) {
+                Utf8 charSequence882;
+                Object oldString882 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(882);
+                if (oldString882 instanceof Utf8) {
+                    charSequence882 = (decoder).readString(((Utf8) oldString882));
+                } else {
+                    charSequence882 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, charSequence882);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F882': "+ unionIndex882));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex883 = (decoder.readIndex());
+        if (unionIndex883 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, null);
+        } else {
+            if (unionIndex883 == 1) {
+                Utf8 charSequence883;
+                Object oldString883 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(883);
+                if (oldString883 instanceof Utf8) {
+                    charSequence883 = (decoder).readString(((Utf8) oldString883));
+                } else {
+                    charSequence883 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, charSequence883);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F883': "+ unionIndex883));
+            }
+        }
+        int unionIndex884 = (decoder.readIndex());
+        if (unionIndex884 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, null);
+        } else {
+            if (unionIndex884 == 1) {
+                Utf8 charSequence884;
+                Object oldString884 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(884);
+                if (oldString884 instanceof Utf8) {
+                    charSequence884 = (decoder).readString(((Utf8) oldString884));
+                } else {
+                    charSequence884 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, charSequence884);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F884': "+ unionIndex884));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex885 = (decoder.readIndex());
+        if (unionIndex885 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, null);
+        } else {
+            if (unionIndex885 == 1) {
+                Utf8 charSequence885;
+                Object oldString885 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(885);
+                if (oldString885 instanceof Utf8) {
+                    charSequence885 = (decoder).readString(((Utf8) oldString885));
+                } else {
+                    charSequence885 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, charSequence885);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F885': "+ unionIndex885));
+            }
+        }
+        int unionIndex886 = (decoder.readIndex());
+        if (unionIndex886 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, null);
+        } else {
+            if (unionIndex886 == 1) {
+                Utf8 charSequence886;
+                Object oldString886 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(886);
+                if (oldString886 instanceof Utf8) {
+                    charSequence886 = (decoder).readString(((Utf8) oldString886));
+                } else {
+                    charSequence886 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, charSequence886);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F886': "+ unionIndex886));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex887 = (decoder.readIndex());
+        if (unionIndex887 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, null);
+        } else {
+            if (unionIndex887 == 1) {
+                Utf8 charSequence887;
+                Object oldString887 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(887);
+                if (oldString887 instanceof Utf8) {
+                    charSequence887 = (decoder).readString(((Utf8) oldString887));
+                } else {
+                    charSequence887 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, charSequence887);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F887': "+ unionIndex887));
+            }
+        }
+        int unionIndex888 = (decoder.readIndex());
+        if (unionIndex888 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, null);
+        } else {
+            if (unionIndex888 == 1) {
+                Utf8 charSequence888;
+                Object oldString888 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(888);
+                if (oldString888 instanceof Utf8) {
+                    charSequence888 = (decoder).readString(((Utf8) oldString888));
+                } else {
+                    charSequence888 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, charSequence888);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F888': "+ unionIndex888));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex889 = (decoder.readIndex());
+        if (unionIndex889 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, null);
+        } else {
+            if (unionIndex889 == 1) {
+                Utf8 charSequence889;
+                Object oldString889 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(889);
+                if (oldString889 instanceof Utf8) {
+                    charSequence889 = (decoder).readString(((Utf8) oldString889));
+                } else {
+                    charSequence889 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, charSequence889);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F889': "+ unionIndex889));
+            }
+        }
+        int unionIndex890 = (decoder.readIndex());
+        if (unionIndex890 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, null);
+        } else {
+            if (unionIndex890 == 1) {
+                Utf8 charSequence890;
+                Object oldString890 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(890);
+                if (oldString890 instanceof Utf8) {
+                    charSequence890 = (decoder).readString(((Utf8) oldString890));
+                } else {
+                    charSequence890 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, charSequence890);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F890': "+ unionIndex890));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex891 = (decoder.readIndex());
+        if (unionIndex891 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, null);
+        } else {
+            if (unionIndex891 == 1) {
+                Utf8 charSequence891;
+                Object oldString891 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(891);
+                if (oldString891 instanceof Utf8) {
+                    charSequence891 = (decoder).readString(((Utf8) oldString891));
+                } else {
+                    charSequence891 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, charSequence891);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F891': "+ unionIndex891));
+            }
+        }
+        int unionIndex892 = (decoder.readIndex());
+        if (unionIndex892 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, null);
+        } else {
+            if (unionIndex892 == 1) {
+                Utf8 charSequence892;
+                Object oldString892 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(892);
+                if (oldString892 instanceof Utf8) {
+                    charSequence892 = (decoder).readString(((Utf8) oldString892));
+                } else {
+                    charSequence892 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, charSequence892);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F892': "+ unionIndex892));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex893 = (decoder.readIndex());
+        if (unionIndex893 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, null);
+        } else {
+            if (unionIndex893 == 1) {
+                Utf8 charSequence893;
+                Object oldString893 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(893);
+                if (oldString893 instanceof Utf8) {
+                    charSequence893 = (decoder).readString(((Utf8) oldString893));
+                } else {
+                    charSequence893 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, charSequence893);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F893': "+ unionIndex893));
+            }
+        }
+        int unionIndex894 = (decoder.readIndex());
+        if (unionIndex894 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, null);
+        } else {
+            if (unionIndex894 == 1) {
+                Utf8 charSequence894;
+                Object oldString894 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(894);
+                if (oldString894 instanceof Utf8) {
+                    charSequence894 = (decoder).readString(((Utf8) oldString894));
+                } else {
+                    charSequence894 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, charSequence894);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F894': "+ unionIndex894));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex895 = (decoder.readIndex());
+        if (unionIndex895 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, null);
+        } else {
+            if (unionIndex895 == 1) {
+                Utf8 charSequence895;
+                Object oldString895 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(895);
+                if (oldString895 instanceof Utf8) {
+                    charSequence895 = (decoder).readString(((Utf8) oldString895));
+                } else {
+                    charSequence895 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, charSequence895);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F895': "+ unionIndex895));
+            }
+        }
+        int unionIndex896 = (decoder.readIndex());
+        if (unionIndex896 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, null);
+        } else {
+            if (unionIndex896 == 1) {
+                Utf8 charSequence896;
+                Object oldString896 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(896);
+                if (oldString896 instanceof Utf8) {
+                    charSequence896 = (decoder).readString(((Utf8) oldString896));
+                } else {
+                    charSequence896 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, charSequence896);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F896': "+ unionIndex896));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex897 = (decoder.readIndex());
+        if (unionIndex897 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, null);
+        } else {
+            if (unionIndex897 == 1) {
+                Utf8 charSequence897;
+                Object oldString897 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(897);
+                if (oldString897 instanceof Utf8) {
+                    charSequence897 = (decoder).readString(((Utf8) oldString897));
+                } else {
+                    charSequence897 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, charSequence897);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F897': "+ unionIndex897));
+            }
+        }
+        int unionIndex898 = (decoder.readIndex());
+        if (unionIndex898 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, null);
+        } else {
+            if (unionIndex898 == 1) {
+                Utf8 charSequence898;
+                Object oldString898 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(898);
+                if (oldString898 instanceof Utf8) {
+                    charSequence898 = (decoder).readString(((Utf8) oldString898));
+                } else {
+                    charSequence898 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, charSequence898);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F898': "+ unionIndex898));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex899 = (decoder.readIndex());
+        if (unionIndex899 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, null);
+        } else {
+            if (unionIndex899 == 1) {
+                Utf8 charSequence899;
+                Object oldString899 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(899);
+                if (oldString899 instanceof Utf8) {
+                    charSequence899 = (decoder).readString(((Utf8) oldString899));
+                } else {
+                    charSequence899 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, charSequence899);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F899': "+ unionIndex899));
+            }
+        }
+        int unionIndex900 = (decoder.readIndex());
+        if (unionIndex900 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, null);
+        } else {
+            if (unionIndex900 == 1) {
+                Utf8 charSequence900;
+                Object oldString900 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(900);
+                if (oldString900 instanceof Utf8) {
+                    charSequence900 = (decoder).readString(((Utf8) oldString900));
+                } else {
+                    charSequence900 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, charSequence900);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F900': "+ unionIndex900));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex901 = (decoder.readIndex());
+        if (unionIndex901 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, null);
+        } else {
+            if (unionIndex901 == 1) {
+                Utf8 charSequence901;
+                Object oldString901 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(901);
+                if (oldString901 instanceof Utf8) {
+                    charSequence901 = (decoder).readString(((Utf8) oldString901));
+                } else {
+                    charSequence901 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, charSequence901);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F901': "+ unionIndex901));
+            }
+        }
+        int unionIndex902 = (decoder.readIndex());
+        if (unionIndex902 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, null);
+        } else {
+            if (unionIndex902 == 1) {
+                Utf8 charSequence902;
+                Object oldString902 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(902);
+                if (oldString902 instanceof Utf8) {
+                    charSequence902 = (decoder).readString(((Utf8) oldString902));
+                } else {
+                    charSequence902 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, charSequence902);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F902': "+ unionIndex902));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex903 = (decoder.readIndex());
+        if (unionIndex903 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, null);
+        } else {
+            if (unionIndex903 == 1) {
+                Utf8 charSequence903;
+                Object oldString903 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(903);
+                if (oldString903 instanceof Utf8) {
+                    charSequence903 = (decoder).readString(((Utf8) oldString903));
+                } else {
+                    charSequence903 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, charSequence903);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F903': "+ unionIndex903));
+            }
+        }
+        int unionIndex904 = (decoder.readIndex());
+        if (unionIndex904 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, null);
+        } else {
+            if (unionIndex904 == 1) {
+                Utf8 charSequence904;
+                Object oldString904 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(904);
+                if (oldString904 instanceof Utf8) {
+                    charSequence904 = (decoder).readString(((Utf8) oldString904));
+                } else {
+                    charSequence904 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, charSequence904);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F904': "+ unionIndex904));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex905 = (decoder.readIndex());
+        if (unionIndex905 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, null);
+        } else {
+            if (unionIndex905 == 1) {
+                Utf8 charSequence905;
+                Object oldString905 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(905);
+                if (oldString905 instanceof Utf8) {
+                    charSequence905 = (decoder).readString(((Utf8) oldString905));
+                } else {
+                    charSequence905 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, charSequence905);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F905': "+ unionIndex905));
+            }
+        }
+        int unionIndex906 = (decoder.readIndex());
+        if (unionIndex906 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, null);
+        } else {
+            if (unionIndex906 == 1) {
+                Utf8 charSequence906;
+                Object oldString906 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(906);
+                if (oldString906 instanceof Utf8) {
+                    charSequence906 = (decoder).readString(((Utf8) oldString906));
+                } else {
+                    charSequence906 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, charSequence906);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F906': "+ unionIndex906));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex907 = (decoder.readIndex());
+        if (unionIndex907 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, null);
+        } else {
+            if (unionIndex907 == 1) {
+                Utf8 charSequence907;
+                Object oldString907 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(907);
+                if (oldString907 instanceof Utf8) {
+                    charSequence907 = (decoder).readString(((Utf8) oldString907));
+                } else {
+                    charSequence907 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, charSequence907);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F907': "+ unionIndex907));
+            }
+        }
+        int unionIndex908 = (decoder.readIndex());
+        if (unionIndex908 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, null);
+        } else {
+            if (unionIndex908 == 1) {
+                Utf8 charSequence908;
+                Object oldString908 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(908);
+                if (oldString908 instanceof Utf8) {
+                    charSequence908 = (decoder).readString(((Utf8) oldString908));
+                } else {
+                    charSequence908 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, charSequence908);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F908': "+ unionIndex908));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex909 = (decoder.readIndex());
+        if (unionIndex909 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, null);
+        } else {
+            if (unionIndex909 == 1) {
+                Utf8 charSequence909;
+                Object oldString909 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(909);
+                if (oldString909 instanceof Utf8) {
+                    charSequence909 = (decoder).readString(((Utf8) oldString909));
+                } else {
+                    charSequence909 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, charSequence909);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F909': "+ unionIndex909));
+            }
+        }
+        int unionIndex910 = (decoder.readIndex());
+        if (unionIndex910 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, null);
+        } else {
+            if (unionIndex910 == 1) {
+                Utf8 charSequence910;
+                Object oldString910 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(910);
+                if (oldString910 instanceof Utf8) {
+                    charSequence910 = (decoder).readString(((Utf8) oldString910));
+                } else {
+                    charSequence910 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, charSequence910);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F910': "+ unionIndex910));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex911 = (decoder.readIndex());
+        if (unionIndex911 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, null);
+        } else {
+            if (unionIndex911 == 1) {
+                Utf8 charSequence911;
+                Object oldString911 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(911);
+                if (oldString911 instanceof Utf8) {
+                    charSequence911 = (decoder).readString(((Utf8) oldString911));
+                } else {
+                    charSequence911 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, charSequence911);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F911': "+ unionIndex911));
+            }
+        }
+        int unionIndex912 = (decoder.readIndex());
+        if (unionIndex912 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, null);
+        } else {
+            if (unionIndex912 == 1) {
+                Utf8 charSequence912;
+                Object oldString912 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(912);
+                if (oldString912 instanceof Utf8) {
+                    charSequence912 = (decoder).readString(((Utf8) oldString912));
+                } else {
+                    charSequence912 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, charSequence912);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F912': "+ unionIndex912));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex913 = (decoder.readIndex());
+        if (unionIndex913 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, null);
+        } else {
+            if (unionIndex913 == 1) {
+                Utf8 charSequence913;
+                Object oldString913 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(913);
+                if (oldString913 instanceof Utf8) {
+                    charSequence913 = (decoder).readString(((Utf8) oldString913));
+                } else {
+                    charSequence913 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, charSequence913);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F913': "+ unionIndex913));
+            }
+        }
+        int unionIndex914 = (decoder.readIndex());
+        if (unionIndex914 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, null);
+        } else {
+            if (unionIndex914 == 1) {
+                Utf8 charSequence914;
+                Object oldString914 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(914);
+                if (oldString914 instanceof Utf8) {
+                    charSequence914 = (decoder).readString(((Utf8) oldString914));
+                } else {
+                    charSequence914 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, charSequence914);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F914': "+ unionIndex914));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex915 = (decoder.readIndex());
+        if (unionIndex915 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, null);
+        } else {
+            if (unionIndex915 == 1) {
+                Utf8 charSequence915;
+                Object oldString915 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(915);
+                if (oldString915 instanceof Utf8) {
+                    charSequence915 = (decoder).readString(((Utf8) oldString915));
+                } else {
+                    charSequence915 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, charSequence915);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F915': "+ unionIndex915));
+            }
+        }
+        int unionIndex916 = (decoder.readIndex());
+        if (unionIndex916 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, null);
+        } else {
+            if (unionIndex916 == 1) {
+                Utf8 charSequence916;
+                Object oldString916 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(916);
+                if (oldString916 instanceof Utf8) {
+                    charSequence916 = (decoder).readString(((Utf8) oldString916));
+                } else {
+                    charSequence916 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, charSequence916);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F916': "+ unionIndex916));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex917 = (decoder.readIndex());
+        if (unionIndex917 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, null);
+        } else {
+            if (unionIndex917 == 1) {
+                Utf8 charSequence917;
+                Object oldString917 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(917);
+                if (oldString917 instanceof Utf8) {
+                    charSequence917 = (decoder).readString(((Utf8) oldString917));
+                } else {
+                    charSequence917 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, charSequence917);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F917': "+ unionIndex917));
+            }
+        }
+        int unionIndex918 = (decoder.readIndex());
+        if (unionIndex918 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, null);
+        } else {
+            if (unionIndex918 == 1) {
+                Utf8 charSequence918;
+                Object oldString918 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(918);
+                if (oldString918 instanceof Utf8) {
+                    charSequence918 = (decoder).readString(((Utf8) oldString918));
+                } else {
+                    charSequence918 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, charSequence918);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F918': "+ unionIndex918));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex919 = (decoder.readIndex());
+        if (unionIndex919 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, null);
+        } else {
+            if (unionIndex919 == 1) {
+                Utf8 charSequence919;
+                Object oldString919 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(919);
+                if (oldString919 instanceof Utf8) {
+                    charSequence919 = (decoder).readString(((Utf8) oldString919));
+                } else {
+                    charSequence919 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, charSequence919);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F919': "+ unionIndex919));
+            }
+        }
+        int unionIndex920 = (decoder.readIndex());
+        if (unionIndex920 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, null);
+        } else {
+            if (unionIndex920 == 1) {
+                Utf8 charSequence920;
+                Object oldString920 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(920);
+                if (oldString920 instanceof Utf8) {
+                    charSequence920 = (decoder).readString(((Utf8) oldString920));
+                } else {
+                    charSequence920 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, charSequence920);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F920': "+ unionIndex920));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex921 = (decoder.readIndex());
+        if (unionIndex921 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, null);
+        } else {
+            if (unionIndex921 == 1) {
+                Utf8 charSequence921;
+                Object oldString921 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(921);
+                if (oldString921 instanceof Utf8) {
+                    charSequence921 = (decoder).readString(((Utf8) oldString921));
+                } else {
+                    charSequence921 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, charSequence921);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F921': "+ unionIndex921));
+            }
+        }
+        int unionIndex922 = (decoder.readIndex());
+        if (unionIndex922 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, null);
+        } else {
+            if (unionIndex922 == 1) {
+                Utf8 charSequence922;
+                Object oldString922 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(922);
+                if (oldString922 instanceof Utf8) {
+                    charSequence922 = (decoder).readString(((Utf8) oldString922));
+                } else {
+                    charSequence922 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, charSequence922);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F922': "+ unionIndex922));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex923 = (decoder.readIndex());
+        if (unionIndex923 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, null);
+        } else {
+            if (unionIndex923 == 1) {
+                Utf8 charSequence923;
+                Object oldString923 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(923);
+                if (oldString923 instanceof Utf8) {
+                    charSequence923 = (decoder).readString(((Utf8) oldString923));
+                } else {
+                    charSequence923 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, charSequence923);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F923': "+ unionIndex923));
+            }
+        }
+        int unionIndex924 = (decoder.readIndex());
+        if (unionIndex924 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, null);
+        } else {
+            if (unionIndex924 == 1) {
+                Utf8 charSequence924;
+                Object oldString924 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(924);
+                if (oldString924 instanceof Utf8) {
+                    charSequence924 = (decoder).readString(((Utf8) oldString924));
+                } else {
+                    charSequence924 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, charSequence924);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F924': "+ unionIndex924));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex925 = (decoder.readIndex());
+        if (unionIndex925 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, null);
+        } else {
+            if (unionIndex925 == 1) {
+                Utf8 charSequence925;
+                Object oldString925 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(925);
+                if (oldString925 instanceof Utf8) {
+                    charSequence925 = (decoder).readString(((Utf8) oldString925));
+                } else {
+                    charSequence925 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, charSequence925);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F925': "+ unionIndex925));
+            }
+        }
+        int unionIndex926 = (decoder.readIndex());
+        if (unionIndex926 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, null);
+        } else {
+            if (unionIndex926 == 1) {
+                Utf8 charSequence926;
+                Object oldString926 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(926);
+                if (oldString926 instanceof Utf8) {
+                    charSequence926 = (decoder).readString(((Utf8) oldString926));
+                } else {
+                    charSequence926 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, charSequence926);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F926': "+ unionIndex926));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex927 = (decoder.readIndex());
+        if (unionIndex927 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, null);
+        } else {
+            if (unionIndex927 == 1) {
+                Utf8 charSequence927;
+                Object oldString927 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(927);
+                if (oldString927 instanceof Utf8) {
+                    charSequence927 = (decoder).readString(((Utf8) oldString927));
+                } else {
+                    charSequence927 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, charSequence927);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F927': "+ unionIndex927));
+            }
+        }
+        int unionIndex928 = (decoder.readIndex());
+        if (unionIndex928 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, null);
+        } else {
+            if (unionIndex928 == 1) {
+                Utf8 charSequence928;
+                Object oldString928 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(928);
+                if (oldString928 instanceof Utf8) {
+                    charSequence928 = (decoder).readString(((Utf8) oldString928));
+                } else {
+                    charSequence928 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, charSequence928);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F928': "+ unionIndex928));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex929 = (decoder.readIndex());
+        if (unionIndex929 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, null);
+        } else {
+            if (unionIndex929 == 1) {
+                Utf8 charSequence929;
+                Object oldString929 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(929);
+                if (oldString929 instanceof Utf8) {
+                    charSequence929 = (decoder).readString(((Utf8) oldString929));
+                } else {
+                    charSequence929 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, charSequence929);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F929': "+ unionIndex929));
+            }
+        }
+        int unionIndex930 = (decoder.readIndex());
+        if (unionIndex930 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, null);
+        } else {
+            if (unionIndex930 == 1) {
+                Utf8 charSequence930;
+                Object oldString930 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(930);
+                if (oldString930 instanceof Utf8) {
+                    charSequence930 = (decoder).readString(((Utf8) oldString930));
+                } else {
+                    charSequence930 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, charSequence930);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F930': "+ unionIndex930));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex931 = (decoder.readIndex());
+        if (unionIndex931 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, null);
+        } else {
+            if (unionIndex931 == 1) {
+                Utf8 charSequence931;
+                Object oldString931 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(931);
+                if (oldString931 instanceof Utf8) {
+                    charSequence931 = (decoder).readString(((Utf8) oldString931));
+                } else {
+                    charSequence931 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, charSequence931);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F931': "+ unionIndex931));
+            }
+        }
+        int unionIndex932 = (decoder.readIndex());
+        if (unionIndex932 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, null);
+        } else {
+            if (unionIndex932 == 1) {
+                Utf8 charSequence932;
+                Object oldString932 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(932);
+                if (oldString932 instanceof Utf8) {
+                    charSequence932 = (decoder).readString(((Utf8) oldString932));
+                } else {
+                    charSequence932 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, charSequence932);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F932': "+ unionIndex932));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex933 = (decoder.readIndex());
+        if (unionIndex933 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, null);
+        } else {
+            if (unionIndex933 == 1) {
+                Utf8 charSequence933;
+                Object oldString933 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(933);
+                if (oldString933 instanceof Utf8) {
+                    charSequence933 = (decoder).readString(((Utf8) oldString933));
+                } else {
+                    charSequence933 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, charSequence933);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F933': "+ unionIndex933));
+            }
+        }
+        int unionIndex934 = (decoder.readIndex());
+        if (unionIndex934 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, null);
+        } else {
+            if (unionIndex934 == 1) {
+                Utf8 charSequence934;
+                Object oldString934 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(934);
+                if (oldString934 instanceof Utf8) {
+                    charSequence934 = (decoder).readString(((Utf8) oldString934));
+                } else {
+                    charSequence934 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, charSequence934);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F934': "+ unionIndex934));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex935 = (decoder.readIndex());
+        if (unionIndex935 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, null);
+        } else {
+            if (unionIndex935 == 1) {
+                Utf8 charSequence935;
+                Object oldString935 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(935);
+                if (oldString935 instanceof Utf8) {
+                    charSequence935 = (decoder).readString(((Utf8) oldString935));
+                } else {
+                    charSequence935 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, charSequence935);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F935': "+ unionIndex935));
+            }
+        }
+        int unionIndex936 = (decoder.readIndex());
+        if (unionIndex936 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, null);
+        } else {
+            if (unionIndex936 == 1) {
+                Utf8 charSequence936;
+                Object oldString936 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(936);
+                if (oldString936 instanceof Utf8) {
+                    charSequence936 = (decoder).readString(((Utf8) oldString936));
+                } else {
+                    charSequence936 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, charSequence936);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F936': "+ unionIndex936));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex937 = (decoder.readIndex());
+        if (unionIndex937 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, null);
+        } else {
+            if (unionIndex937 == 1) {
+                Utf8 charSequence937;
+                Object oldString937 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(937);
+                if (oldString937 instanceof Utf8) {
+                    charSequence937 = (decoder).readString(((Utf8) oldString937));
+                } else {
+                    charSequence937 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, charSequence937);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F937': "+ unionIndex937));
+            }
+        }
+        int unionIndex938 = (decoder.readIndex());
+        if (unionIndex938 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, null);
+        } else {
+            if (unionIndex938 == 1) {
+                Utf8 charSequence938;
+                Object oldString938 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(938);
+                if (oldString938 instanceof Utf8) {
+                    charSequence938 = (decoder).readString(((Utf8) oldString938));
+                } else {
+                    charSequence938 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, charSequence938);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F938': "+ unionIndex938));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex939 = (decoder.readIndex());
+        if (unionIndex939 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, null);
+        } else {
+            if (unionIndex939 == 1) {
+                Utf8 charSequence939;
+                Object oldString939 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(939);
+                if (oldString939 instanceof Utf8) {
+                    charSequence939 = (decoder).readString(((Utf8) oldString939));
+                } else {
+                    charSequence939 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, charSequence939);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F939': "+ unionIndex939));
+            }
+        }
+        int unionIndex940 = (decoder.readIndex());
+        if (unionIndex940 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, null);
+        } else {
+            if (unionIndex940 == 1) {
+                Utf8 charSequence940;
+                Object oldString940 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(940);
+                if (oldString940 instanceof Utf8) {
+                    charSequence940 = (decoder).readString(((Utf8) oldString940));
+                } else {
+                    charSequence940 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, charSequence940);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F940': "+ unionIndex940));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex941 = (decoder.readIndex());
+        if (unionIndex941 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, null);
+        } else {
+            if (unionIndex941 == 1) {
+                Utf8 charSequence941;
+                Object oldString941 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(941);
+                if (oldString941 instanceof Utf8) {
+                    charSequence941 = (decoder).readString(((Utf8) oldString941));
+                } else {
+                    charSequence941 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, charSequence941);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F941': "+ unionIndex941));
+            }
+        }
+        int unionIndex942 = (decoder.readIndex());
+        if (unionIndex942 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, null);
+        } else {
+            if (unionIndex942 == 1) {
+                Utf8 charSequence942;
+                Object oldString942 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(942);
+                if (oldString942 instanceof Utf8) {
+                    charSequence942 = (decoder).readString(((Utf8) oldString942));
+                } else {
+                    charSequence942 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, charSequence942);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F942': "+ unionIndex942));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex943 = (decoder.readIndex());
+        if (unionIndex943 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, null);
+        } else {
+            if (unionIndex943 == 1) {
+                Utf8 charSequence943;
+                Object oldString943 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(943);
+                if (oldString943 instanceof Utf8) {
+                    charSequence943 = (decoder).readString(((Utf8) oldString943));
+                } else {
+                    charSequence943 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, charSequence943);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F943': "+ unionIndex943));
+            }
+        }
+        int unionIndex944 = (decoder.readIndex());
+        if (unionIndex944 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, null);
+        } else {
+            if (unionIndex944 == 1) {
+                Utf8 charSequence944;
+                Object oldString944 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(944);
+                if (oldString944 instanceof Utf8) {
+                    charSequence944 = (decoder).readString(((Utf8) oldString944));
+                } else {
+                    charSequence944 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, charSequence944);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F944': "+ unionIndex944));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex945 = (decoder.readIndex());
+        if (unionIndex945 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, null);
+        } else {
+            if (unionIndex945 == 1) {
+                Utf8 charSequence945;
+                Object oldString945 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(945);
+                if (oldString945 instanceof Utf8) {
+                    charSequence945 = (decoder).readString(((Utf8) oldString945));
+                } else {
+                    charSequence945 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, charSequence945);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F945': "+ unionIndex945));
+            }
+        }
+        int unionIndex946 = (decoder.readIndex());
+        if (unionIndex946 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, null);
+        } else {
+            if (unionIndex946 == 1) {
+                Utf8 charSequence946;
+                Object oldString946 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(946);
+                if (oldString946 instanceof Utf8) {
+                    charSequence946 = (decoder).readString(((Utf8) oldString946));
+                } else {
+                    charSequence946 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, charSequence946);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F946': "+ unionIndex946));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex947 = (decoder.readIndex());
+        if (unionIndex947 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, null);
+        } else {
+            if (unionIndex947 == 1) {
+                Utf8 charSequence947;
+                Object oldString947 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(947);
+                if (oldString947 instanceof Utf8) {
+                    charSequence947 = (decoder).readString(((Utf8) oldString947));
+                } else {
+                    charSequence947 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, charSequence947);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F947': "+ unionIndex947));
+            }
+        }
+        int unionIndex948 = (decoder.readIndex());
+        if (unionIndex948 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, null);
+        } else {
+            if (unionIndex948 == 1) {
+                Utf8 charSequence948;
+                Object oldString948 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(948);
+                if (oldString948 instanceof Utf8) {
+                    charSequence948 = (decoder).readString(((Utf8) oldString948));
+                } else {
+                    charSequence948 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, charSequence948);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F948': "+ unionIndex948));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex949 = (decoder.readIndex());
+        if (unionIndex949 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, null);
+        } else {
+            if (unionIndex949 == 1) {
+                Utf8 charSequence949;
+                Object oldString949 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(949);
+                if (oldString949 instanceof Utf8) {
+                    charSequence949 = (decoder).readString(((Utf8) oldString949));
+                } else {
+                    charSequence949 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, charSequence949);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F949': "+ unionIndex949));
+            }
+        }
+        int unionIndex950 = (decoder.readIndex());
+        if (unionIndex950 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, null);
+        } else {
+            if (unionIndex950 == 1) {
+                Utf8 charSequence950;
+                Object oldString950 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(950);
+                if (oldString950 instanceof Utf8) {
+                    charSequence950 = (decoder).readString(((Utf8) oldString950));
+                } else {
+                    charSequence950 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, charSequence950);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F950': "+ unionIndex950));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex951 = (decoder.readIndex());
+        if (unionIndex951 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, null);
+        } else {
+            if (unionIndex951 == 1) {
+                Utf8 charSequence951;
+                Object oldString951 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(951);
+                if (oldString951 instanceof Utf8) {
+                    charSequence951 = (decoder).readString(((Utf8) oldString951));
+                } else {
+                    charSequence951 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, charSequence951);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F951': "+ unionIndex951));
+            }
+        }
+        int unionIndex952 = (decoder.readIndex());
+        if (unionIndex952 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, null);
+        } else {
+            if (unionIndex952 == 1) {
+                Utf8 charSequence952;
+                Object oldString952 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(952);
+                if (oldString952 instanceof Utf8) {
+                    charSequence952 = (decoder).readString(((Utf8) oldString952));
+                } else {
+                    charSequence952 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, charSequence952);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F952': "+ unionIndex952));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex953 = (decoder.readIndex());
+        if (unionIndex953 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, null);
+        } else {
+            if (unionIndex953 == 1) {
+                Utf8 charSequence953;
+                Object oldString953 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(953);
+                if (oldString953 instanceof Utf8) {
+                    charSequence953 = (decoder).readString(((Utf8) oldString953));
+                } else {
+                    charSequence953 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, charSequence953);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F953': "+ unionIndex953));
+            }
+        }
+        int unionIndex954 = (decoder.readIndex());
+        if (unionIndex954 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, null);
+        } else {
+            if (unionIndex954 == 1) {
+                Utf8 charSequence954;
+                Object oldString954 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(954);
+                if (oldString954 instanceof Utf8) {
+                    charSequence954 = (decoder).readString(((Utf8) oldString954));
+                } else {
+                    charSequence954 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, charSequence954);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F954': "+ unionIndex954));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex955 = (decoder.readIndex());
+        if (unionIndex955 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, null);
+        } else {
+            if (unionIndex955 == 1) {
+                Utf8 charSequence955;
+                Object oldString955 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(955);
+                if (oldString955 instanceof Utf8) {
+                    charSequence955 = (decoder).readString(((Utf8) oldString955));
+                } else {
+                    charSequence955 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, charSequence955);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F955': "+ unionIndex955));
+            }
+        }
+        int unionIndex956 = (decoder.readIndex());
+        if (unionIndex956 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, null);
+        } else {
+            if (unionIndex956 == 1) {
+                Utf8 charSequence956;
+                Object oldString956 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(956);
+                if (oldString956 instanceof Utf8) {
+                    charSequence956 = (decoder).readString(((Utf8) oldString956));
+                } else {
+                    charSequence956 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, charSequence956);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F956': "+ unionIndex956));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex957 = (decoder.readIndex());
+        if (unionIndex957 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, null);
+        } else {
+            if (unionIndex957 == 1) {
+                Utf8 charSequence957;
+                Object oldString957 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(957);
+                if (oldString957 instanceof Utf8) {
+                    charSequence957 = (decoder).readString(((Utf8) oldString957));
+                } else {
+                    charSequence957 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, charSequence957);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F957': "+ unionIndex957));
+            }
+        }
+        int unionIndex958 = (decoder.readIndex());
+        if (unionIndex958 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, null);
+        } else {
+            if (unionIndex958 == 1) {
+                Utf8 charSequence958;
+                Object oldString958 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(958);
+                if (oldString958 instanceof Utf8) {
+                    charSequence958 = (decoder).readString(((Utf8) oldString958));
+                } else {
+                    charSequence958 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, charSequence958);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F958': "+ unionIndex958));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex959 = (decoder.readIndex());
+        if (unionIndex959 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, null);
+        } else {
+            if (unionIndex959 == 1) {
+                Utf8 charSequence959;
+                Object oldString959 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(959);
+                if (oldString959 instanceof Utf8) {
+                    charSequence959 = (decoder).readString(((Utf8) oldString959));
+                } else {
+                    charSequence959 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, charSequence959);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F959': "+ unionIndex959));
+            }
+        }
+        int unionIndex960 = (decoder.readIndex());
+        if (unionIndex960 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, null);
+        } else {
+            if (unionIndex960 == 1) {
+                Utf8 charSequence960;
+                Object oldString960 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(960);
+                if (oldString960 instanceof Utf8) {
+                    charSequence960 = (decoder).readString(((Utf8) oldString960));
+                } else {
+                    charSequence960 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, charSequence960);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F960': "+ unionIndex960));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex961 = (decoder.readIndex());
+        if (unionIndex961 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, null);
+        } else {
+            if (unionIndex961 == 1) {
+                Utf8 charSequence961;
+                Object oldString961 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(961);
+                if (oldString961 instanceof Utf8) {
+                    charSequence961 = (decoder).readString(((Utf8) oldString961));
+                } else {
+                    charSequence961 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, charSequence961);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F961': "+ unionIndex961));
+            }
+        }
+        int unionIndex962 = (decoder.readIndex());
+        if (unionIndex962 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, null);
+        } else {
+            if (unionIndex962 == 1) {
+                Utf8 charSequence962;
+                Object oldString962 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(962);
+                if (oldString962 instanceof Utf8) {
+                    charSequence962 = (decoder).readString(((Utf8) oldString962));
+                } else {
+                    charSequence962 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, charSequence962);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F962': "+ unionIndex962));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex963 = (decoder.readIndex());
+        if (unionIndex963 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, null);
+        } else {
+            if (unionIndex963 == 1) {
+                Utf8 charSequence963;
+                Object oldString963 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(963);
+                if (oldString963 instanceof Utf8) {
+                    charSequence963 = (decoder).readString(((Utf8) oldString963));
+                } else {
+                    charSequence963 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, charSequence963);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F963': "+ unionIndex963));
+            }
+        }
+        int unionIndex964 = (decoder.readIndex());
+        if (unionIndex964 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, null);
+        } else {
+            if (unionIndex964 == 1) {
+                Utf8 charSequence964;
+                Object oldString964 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(964);
+                if (oldString964 instanceof Utf8) {
+                    charSequence964 = (decoder).readString(((Utf8) oldString964));
+                } else {
+                    charSequence964 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, charSequence964);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F964': "+ unionIndex964));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex965 = (decoder.readIndex());
+        if (unionIndex965 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, null);
+        } else {
+            if (unionIndex965 == 1) {
+                Utf8 charSequence965;
+                Object oldString965 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(965);
+                if (oldString965 instanceof Utf8) {
+                    charSequence965 = (decoder).readString(((Utf8) oldString965));
+                } else {
+                    charSequence965 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, charSequence965);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F965': "+ unionIndex965));
+            }
+        }
+        int unionIndex966 = (decoder.readIndex());
+        if (unionIndex966 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, null);
+        } else {
+            if (unionIndex966 == 1) {
+                Utf8 charSequence966;
+                Object oldString966 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(966);
+                if (oldString966 instanceof Utf8) {
+                    charSequence966 = (decoder).readString(((Utf8) oldString966));
+                } else {
+                    charSequence966 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, charSequence966);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F966': "+ unionIndex966));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex967 = (decoder.readIndex());
+        if (unionIndex967 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, null);
+        } else {
+            if (unionIndex967 == 1) {
+                Utf8 charSequence967;
+                Object oldString967 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(967);
+                if (oldString967 instanceof Utf8) {
+                    charSequence967 = (decoder).readString(((Utf8) oldString967));
+                } else {
+                    charSequence967 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, charSequence967);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F967': "+ unionIndex967));
+            }
+        }
+        int unionIndex968 = (decoder.readIndex());
+        if (unionIndex968 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, null);
+        } else {
+            if (unionIndex968 == 1) {
+                Utf8 charSequence968;
+                Object oldString968 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(968);
+                if (oldString968 instanceof Utf8) {
+                    charSequence968 = (decoder).readString(((Utf8) oldString968));
+                } else {
+                    charSequence968 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, charSequence968);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F968': "+ unionIndex968));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex969 = (decoder.readIndex());
+        if (unionIndex969 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, null);
+        } else {
+            if (unionIndex969 == 1) {
+                Utf8 charSequence969;
+                Object oldString969 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(969);
+                if (oldString969 instanceof Utf8) {
+                    charSequence969 = (decoder).readString(((Utf8) oldString969));
+                } else {
+                    charSequence969 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, charSequence969);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F969': "+ unionIndex969));
+            }
+        }
+        int unionIndex970 = (decoder.readIndex());
+        if (unionIndex970 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, null);
+        } else {
+            if (unionIndex970 == 1) {
+                Utf8 charSequence970;
+                Object oldString970 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(970);
+                if (oldString970 instanceof Utf8) {
+                    charSequence970 = (decoder).readString(((Utf8) oldString970));
+                } else {
+                    charSequence970 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, charSequence970);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F970': "+ unionIndex970));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex971 = (decoder.readIndex());
+        if (unionIndex971 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, null);
+        } else {
+            if (unionIndex971 == 1) {
+                Utf8 charSequence971;
+                Object oldString971 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(971);
+                if (oldString971 instanceof Utf8) {
+                    charSequence971 = (decoder).readString(((Utf8) oldString971));
+                } else {
+                    charSequence971 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, charSequence971);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F971': "+ unionIndex971));
+            }
+        }
+        int unionIndex972 = (decoder.readIndex());
+        if (unionIndex972 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, null);
+        } else {
+            if (unionIndex972 == 1) {
+                Utf8 charSequence972;
+                Object oldString972 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(972);
+                if (oldString972 instanceof Utf8) {
+                    charSequence972 = (decoder).readString(((Utf8) oldString972));
+                } else {
+                    charSequence972 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, charSequence972);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F972': "+ unionIndex972));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex973 = (decoder.readIndex());
+        if (unionIndex973 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, null);
+        } else {
+            if (unionIndex973 == 1) {
+                Utf8 charSequence973;
+                Object oldString973 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(973);
+                if (oldString973 instanceof Utf8) {
+                    charSequence973 = (decoder).readString(((Utf8) oldString973));
+                } else {
+                    charSequence973 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, charSequence973);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F973': "+ unionIndex973));
+            }
+        }
+        int unionIndex974 = (decoder.readIndex());
+        if (unionIndex974 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, null);
+        } else {
+            if (unionIndex974 == 1) {
+                Utf8 charSequence974;
+                Object oldString974 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(974);
+                if (oldString974 instanceof Utf8) {
+                    charSequence974 = (decoder).readString(((Utf8) oldString974));
+                } else {
+                    charSequence974 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, charSequence974);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F974': "+ unionIndex974));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex975 = (decoder.readIndex());
+        if (unionIndex975 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, null);
+        } else {
+            if (unionIndex975 == 1) {
+                Utf8 charSequence975;
+                Object oldString975 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(975);
+                if (oldString975 instanceof Utf8) {
+                    charSequence975 = (decoder).readString(((Utf8) oldString975));
+                } else {
+                    charSequence975 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, charSequence975);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F975': "+ unionIndex975));
+            }
+        }
+        int unionIndex976 = (decoder.readIndex());
+        if (unionIndex976 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, null);
+        } else {
+            if (unionIndex976 == 1) {
+                Utf8 charSequence976;
+                Object oldString976 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(976);
+                if (oldString976 instanceof Utf8) {
+                    charSequence976 = (decoder).readString(((Utf8) oldString976));
+                } else {
+                    charSequence976 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, charSequence976);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F976': "+ unionIndex976));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex977 = (decoder.readIndex());
+        if (unionIndex977 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, null);
+        } else {
+            if (unionIndex977 == 1) {
+                Utf8 charSequence977;
+                Object oldString977 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(977);
+                if (oldString977 instanceof Utf8) {
+                    charSequence977 = (decoder).readString(((Utf8) oldString977));
+                } else {
+                    charSequence977 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, charSequence977);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F977': "+ unionIndex977));
+            }
+        }
+        int unionIndex978 = (decoder.readIndex());
+        if (unionIndex978 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, null);
+        } else {
+            if (unionIndex978 == 1) {
+                Utf8 charSequence978;
+                Object oldString978 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(978);
+                if (oldString978 instanceof Utf8) {
+                    charSequence978 = (decoder).readString(((Utf8) oldString978));
+                } else {
+                    charSequence978 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, charSequence978);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F978': "+ unionIndex978));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex979 = (decoder.readIndex());
+        if (unionIndex979 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, null);
+        } else {
+            if (unionIndex979 == 1) {
+                Utf8 charSequence979;
+                Object oldString979 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(979);
+                if (oldString979 instanceof Utf8) {
+                    charSequence979 = (decoder).readString(((Utf8) oldString979));
+                } else {
+                    charSequence979 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, charSequence979);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F979': "+ unionIndex979));
+            }
+        }
+        int unionIndex980 = (decoder.readIndex());
+        if (unionIndex980 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, null);
+        } else {
+            if (unionIndex980 == 1) {
+                Utf8 charSequence980;
+                Object oldString980 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(980);
+                if (oldString980 instanceof Utf8) {
+                    charSequence980 = (decoder).readString(((Utf8) oldString980));
+                } else {
+                    charSequence980 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, charSequence980);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F980': "+ unionIndex980));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex981 = (decoder.readIndex());
+        if (unionIndex981 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, null);
+        } else {
+            if (unionIndex981 == 1) {
+                Utf8 charSequence981;
+                Object oldString981 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(981);
+                if (oldString981 instanceof Utf8) {
+                    charSequence981 = (decoder).readString(((Utf8) oldString981));
+                } else {
+                    charSequence981 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, charSequence981);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F981': "+ unionIndex981));
+            }
+        }
+        int unionIndex982 = (decoder.readIndex());
+        if (unionIndex982 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, null);
+        } else {
+            if (unionIndex982 == 1) {
+                Utf8 charSequence982;
+                Object oldString982 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(982);
+                if (oldString982 instanceof Utf8) {
+                    charSequence982 = (decoder).readString(((Utf8) oldString982));
+                } else {
+                    charSequence982 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, charSequence982);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F982': "+ unionIndex982));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex983 = (decoder.readIndex());
+        if (unionIndex983 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, null);
+        } else {
+            if (unionIndex983 == 1) {
+                Utf8 charSequence983;
+                Object oldString983 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(983);
+                if (oldString983 instanceof Utf8) {
+                    charSequence983 = (decoder).readString(((Utf8) oldString983));
+                } else {
+                    charSequence983 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, charSequence983);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F983': "+ unionIndex983));
+            }
+        }
+        int unionIndex984 = (decoder.readIndex());
+        if (unionIndex984 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, null);
+        } else {
+            if (unionIndex984 == 1) {
+                Utf8 charSequence984;
+                Object oldString984 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(984);
+                if (oldString984 instanceof Utf8) {
+                    charSequence984 = (decoder).readString(((Utf8) oldString984));
+                } else {
+                    charSequence984 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, charSequence984);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F984': "+ unionIndex984));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex985 = (decoder.readIndex());
+        if (unionIndex985 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, null);
+        } else {
+            if (unionIndex985 == 1) {
+                Utf8 charSequence985;
+                Object oldString985 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(985);
+                if (oldString985 instanceof Utf8) {
+                    charSequence985 = (decoder).readString(((Utf8) oldString985));
+                } else {
+                    charSequence985 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, charSequence985);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F985': "+ unionIndex985));
+            }
+        }
+        int unionIndex986 = (decoder.readIndex());
+        if (unionIndex986 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, null);
+        } else {
+            if (unionIndex986 == 1) {
+                Utf8 charSequence986;
+                Object oldString986 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(986);
+                if (oldString986 instanceof Utf8) {
+                    charSequence986 = (decoder).readString(((Utf8) oldString986));
+                } else {
+                    charSequence986 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, charSequence986);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F986': "+ unionIndex986));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex987 = (decoder.readIndex());
+        if (unionIndex987 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, null);
+        } else {
+            if (unionIndex987 == 1) {
+                Utf8 charSequence987;
+                Object oldString987 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(987);
+                if (oldString987 instanceof Utf8) {
+                    charSequence987 = (decoder).readString(((Utf8) oldString987));
+                } else {
+                    charSequence987 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, charSequence987);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F987': "+ unionIndex987));
+            }
+        }
+        int unionIndex988 = (decoder.readIndex());
+        if (unionIndex988 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, null);
+        } else {
+            if (unionIndex988 == 1) {
+                Utf8 charSequence988;
+                Object oldString988 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(988);
+                if (oldString988 instanceof Utf8) {
+                    charSequence988 = (decoder).readString(((Utf8) oldString988));
+                } else {
+                    charSequence988 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, charSequence988);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F988': "+ unionIndex988));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex989 = (decoder.readIndex());
+        if (unionIndex989 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, null);
+        } else {
+            if (unionIndex989 == 1) {
+                Utf8 charSequence989;
+                Object oldString989 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(989);
+                if (oldString989 instanceof Utf8) {
+                    charSequence989 = (decoder).readString(((Utf8) oldString989));
+                } else {
+                    charSequence989 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, charSequence989);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F989': "+ unionIndex989));
+            }
+        }
+        int unionIndex990 = (decoder.readIndex());
+        if (unionIndex990 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, null);
+        } else {
+            if (unionIndex990 == 1) {
+                Utf8 charSequence990;
+                Object oldString990 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(990);
+                if (oldString990 instanceof Utf8) {
+                    charSequence990 = (decoder).readString(((Utf8) oldString990));
+                } else {
+                    charSequence990 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, charSequence990);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F990': "+ unionIndex990));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex991 = (decoder.readIndex());
+        if (unionIndex991 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, null);
+        } else {
+            if (unionIndex991 == 1) {
+                Utf8 charSequence991;
+                Object oldString991 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(991);
+                if (oldString991 instanceof Utf8) {
+                    charSequence991 = (decoder).readString(((Utf8) oldString991));
+                } else {
+                    charSequence991 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, charSequence991);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F991': "+ unionIndex991));
+            }
+        }
+        int unionIndex992 = (decoder.readIndex());
+        if (unionIndex992 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, null);
+        } else {
+            if (unionIndex992 == 1) {
+                Utf8 charSequence992;
+                Object oldString992 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(992);
+                if (oldString992 instanceof Utf8) {
+                    charSequence992 = (decoder).readString(((Utf8) oldString992));
+                } else {
+                    charSequence992 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, charSequence992);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F992': "+ unionIndex992));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex993 = (decoder.readIndex());
+        if (unionIndex993 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, null);
+        } else {
+            if (unionIndex993 == 1) {
+                Utf8 charSequence993;
+                Object oldString993 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(993);
+                if (oldString993 instanceof Utf8) {
+                    charSequence993 = (decoder).readString(((Utf8) oldString993));
+                } else {
+                    charSequence993 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, charSequence993);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F993': "+ unionIndex993));
+            }
+        }
+        int unionIndex994 = (decoder.readIndex());
+        if (unionIndex994 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, null);
+        } else {
+            if (unionIndex994 == 1) {
+                Utf8 charSequence994;
+                Object oldString994 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(994);
+                if (oldString994 instanceof Utf8) {
+                    charSequence994 = (decoder).readString(((Utf8) oldString994));
+                } else {
+                    charSequence994 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, charSequence994);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F994': "+ unionIndex994));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex995 = (decoder.readIndex());
+        if (unionIndex995 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, null);
+        } else {
+            if (unionIndex995 == 1) {
+                Utf8 charSequence995;
+                Object oldString995 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(995);
+                if (oldString995 instanceof Utf8) {
+                    charSequence995 = (decoder).readString(((Utf8) oldString995));
+                } else {
+                    charSequence995 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, charSequence995);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F995': "+ unionIndex995));
+            }
+        }
+        int unionIndex996 = (decoder.readIndex());
+        if (unionIndex996 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, null);
+        } else {
+            if (unionIndex996 == 1) {
+                Utf8 charSequence996;
+                Object oldString996 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(996);
+                if (oldString996 instanceof Utf8) {
+                    charSequence996 = (decoder).readString(((Utf8) oldString996));
+                } else {
+                    charSequence996 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, charSequence996);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F996': "+ unionIndex996));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex997 = (decoder.readIndex());
+        if (unionIndex997 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, null);
+        } else {
+            if (unionIndex997 == 1) {
+                Utf8 charSequence997;
+                Object oldString997 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(997);
+                if (oldString997 instanceof Utf8) {
+                    charSequence997 = (decoder).readString(((Utf8) oldString997));
+                } else {
+                    charSequence997 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, charSequence997);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F997': "+ unionIndex997));
+            }
+        }
+        int unionIndex998 = (decoder.readIndex());
+        if (unionIndex998 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, null);
+        } else {
+            if (unionIndex998 == 1) {
+                Utf8 charSequence998;
+                Object oldString998 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(998);
+                if (oldString998 instanceof Utf8) {
+                    charSequence998 = (decoder).readString(((Utf8) oldString998));
+                } else {
+                    charSequence998 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, charSequence998);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F998': "+ unionIndex998));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex999 = (decoder.readIndex());
+        if (unionIndex999 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, null);
+        } else {
+            if (unionIndex999 == 1) {
+                Utf8 charSequence999;
+                Object oldString999 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(999);
+                if (oldString999 instanceof Utf8) {
+                    charSequence999 = (decoder).readString(((Utf8) oldString999));
+                } else {
+                    charSequence999 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, charSequence999);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F999': "+ unionIndex999));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
new file mode 100644
index 000000000..ea1191de2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testString0;
+    private final Schema testStringUnionAlias0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testString0 = readerSchema.getField("testString").schema();
+        this.testStringUnionAlias0 = readerSchema.getField("testStringUnionAlias").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testString': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0((FastGenericDeserializerGeneratorTest_shouldReadAliasedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnionAlias': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
new file mode 100644
index 000000000..ef941ca69
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
@@ -0,0 +1,122 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Schema testEnumUnion0;
+    private final Schema testEnumArray0;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(0, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                testEnumArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        testEnumUnionArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
new file mode 100644
index 000000000..eab5df416
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testFixed0;
+    private final Schema testFixedUnion0;
+    private final Schema testFixedArray0;
+    private final Schema testFixedUnionArray0;
+    private final Schema testFixedUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testFixed0 = readerSchema.getField("testFixed").schema();
+        this.testFixedUnion0 = readerSchema.getField("testFixedUnion").schema();
+        this.testFixedArray0 = readerSchema.getField("testFixedArray").schema();
+        this.testFixedUnionArray0 = readerSchema.getField("testFixedUnionArray").schema();
+        this.testFixedUnionArrayArrayElemSchema0 = testFixedUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        byte[] testFixed1;
+        Object oldFixed0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(0);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (2))) {
+            testFixed1 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed1 = ( new byte[2]);
+        }
+        decoder.readFixed(testFixed1);
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(0, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed1));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadFixed;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(1);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (2))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed2);
+                FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed2));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericFixed> testFixedArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(2);
+        if (oldArray0 instanceof List) {
+            testFixedArray1 = ((List) oldArray0);
+            testFixedArray1 .clear();
+        } else {
+            testFixedArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen0), testFixedArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed3;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (2))) {
+                    testFixed3 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed3 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed3);
+                testFixedArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed3));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(2, testFixedArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(3);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray1 = ((List) oldArray1);
+            testFixedUnionArray1 .clear();
+        } else {
+            testFixedUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen1), testFixedUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        byte[] testFixed4;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (2))) {
+                            testFixed4 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed4 = ( new byte[2]);
+                        }
+                        decoder.readFixed(testFixed4);
+                        testFixedUnionArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed4));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(3, testFixedUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
new file mode 100644
index 000000000..b438a02fe
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
@@ -0,0 +1,102 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema union0;
+    private final Schema unionOptionSchema0;
+    private final Schema subField0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.union0 = readerSchema.getField("union").schema();
+        this.unionOptionSchema0 = union0 .getTypes().get(1);
+        this.subField0 = unionOptionSchema0 .getField("subField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence1;
+                    Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0);
+                    if (oldString1 instanceof Utf8) {
+                        charSequence1 = (decoder).readString(((Utf8) oldString1));
+                    } else {
+                        charSequence1 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, charSequence1);
+                } else {
+                    if (unionIndex0 == 3) {
+                        FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+                    }
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(unionOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
new file mode 100644
index 000000000..9e384f177
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
@@ -0,0 +1,129 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapField0;
+    private final Schema mapFieldMapValueSchema0;
+    private final Schema mapFieldValueMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapField0 = readerSchema.getField("mapField").schema();
+        this.mapFieldMapValueSchema0 = mapField0 .getValueType();
+        this.mapFieldValueMapValueSchema0 = mapFieldMapValueSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Map<Utf8, List<Integer>>> mapField1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
+                if (oldMap0 instanceof Map) {
+                    mapFieldReuse0 = ((Map) oldMap0);
+                }
+                if (mapFieldReuse0 != (null)) {
+                    mapFieldReuse0 .clear();
+                    mapField1 = mapFieldReuse0;
+                } else {
+                    mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Map<Utf8, List<Integer>> mapFieldValue0 = null;
+                    long chunkLen1 = (decoder.readMapStart());
+                    if (chunkLen1 > 0) {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, ((int) chunkLen1)));
+                        } else {
+                            Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
+                            if (null instanceof Map) {
+                                mapFieldValueReuse0 = ((Map) null);
+                            }
+                            if (mapFieldValueReuse0 != (null)) {
+                                mapFieldValueReuse0 .clear();
+                                mapFieldValue0 = mapFieldValueReuse0;
+                            } else {
+                                mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                            }
+                        }
+                        do {
+                            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                                Utf8 key1 = (decoder.readString(null));
+                                PrimitiveIntList mapFieldValueValue0 = null;
+                                long chunkLen2 = (decoder.readArrayStart());
+                                if (null instanceof PrimitiveIntList) {
+                                    mapFieldValueValue0 = ((PrimitiveIntList) null);
+                                    mapFieldValueValue0 .clear();
+                                } else {
+                                    mapFieldValueValue0 = new PrimitiveIntArrayList(((int) chunkLen2));
+                                }
+                                while (chunkLen2 > 0) {
+                                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                                        mapFieldValueValue0 .addPrimitive((decoder.readInt()));
+                                    }
+                                    chunkLen2 = (decoder.arrayNext());
+                                }
+                                mapFieldValue0 .put(key1, mapFieldValueValue0);
+                            }
+                            chunkLen1 = (decoder.mapNext());
+                        } while (chunkLen1 > 0);
+                    } else {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, 0));
+                        } else {
+                            mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+                        }
+                    }
+                    mapField1 .put(key0, mapFieldValue0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), 0));
+            } else {
+                mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadNestedMap.put(0, mapField1);
+        return FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
new file mode 100644
index 000000000..3534a298d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
@@ -0,0 +1,206 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(1));
+        tempEnumMapping0 .put(new Integer(1), new Integer(0));
+        tempEnumMapping0 .put(new Integer(2), new Integer(4));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(1));
+        tempEnumMapping1 .put(new Integer(1), new Integer(0));
+        tempEnumMapping1 .put(new Integer(2), new Integer(4));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(1));
+        tempEnumMapping2 .put(new Integer(1), new Integer(0));
+        tempEnumMapping2 .put(new Integer(2), new Integer(4));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(1));
+        tempEnumMapping3 .put(new Integer(1), new Integer(0));
+        tempEnumMapping3 .put(new Integer(2), new Integer(4));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            testEnumArray1 .clear();
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            testEnumUnionArray1 .clear();
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
new file mode 100644
index 000000000..962f579cc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
@@ -0,0 +1,209 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testIntUnion0;
+    private final Schema testStringUnion0;
+    private final Schema testLongUnion0;
+    private final Schema testDoubleUnion0;
+    private final Schema testFloatUnion0;
+    private final Schema testBooleanUnion0;
+    private final Schema testBytesUnion0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testIntUnion0 = readerSchema.getField("testIntUnion").schema();
+        this.testStringUnion0 = readerSchema.getField("testStringUnion").schema();
+        this.testLongUnion0 = readerSchema.getField("testLongUnion").schema();
+        this.testDoubleUnion0 = readerSchema.getField("testDoubleUnion").schema();
+        this.testFloatUnion0 = readerSchema.getField("testFloatUnion").schema();
+        this.testBooleanUnion0 = readerSchema.getField("testBooleanUnion").schema();
+        this.testBytesUnion0 = readerSchema.getField("testBytesUnion").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(0, (decoder.readInt()));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(2);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(2, charSequence0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(3);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex1));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(4, (decoder.readLong()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(6, (decoder.readDouble()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(8, (decoder.readFloat()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(10, (decoder.readBoolean()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(12);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(12, byteBuffer0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(13);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
new file mode 100644
index 000000000..1261ffa76
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
@@ -0,0 +1,160 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema intFieldField0;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.intFieldField0 = record10 .getField("intField").schema();
+        this.intField0 = record10 .getField("intField").schema();
+        this.subField1 = record10 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        subRecord.put(0, null);
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                subRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex1));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = subRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
new file mode 100644
index 000000000..721226cb0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
@@ -0,0 +1,175 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema record20;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.record20 = readerSchema.getField("record2").schema();
+        this.intField0 = record20 .getField("intField").schema();
+        this.subField1 = record20 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex0));
+            }
+        }
+        populate_aliasedSubRecord0((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = aliasedSubRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            recordArray1 .clear();
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record20)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record20);
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                aliasedSubRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex2));
+            }
+        }
+        populate_aliasedSubRecord1((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord1(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = aliasedSubRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
new file mode 100644
index 000000000..e211c5e71
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArray0;
+    private final Schema recordsArrayArrayElemSchema0;
+    private final Schema subField0;
+    private final Schema recordsMap0;
+    private final Schema recordsArrayUnion0;
+    private final Schema recordsArrayUnionOptionSchema0;
+    private final Schema recordsArrayUnionOptionArrayElemSchema0;
+    private final Schema recordsMapUnion0;
+    private final Schema recordsMapUnionOptionSchema0;
+    private final Schema recordsMapUnionOptionMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArray0 = readerSchema.getField("recordsArray").schema();
+        this.recordsArrayArrayElemSchema0 = recordsArray0 .getElementType();
+        this.subField0 = recordsArrayArrayElemSchema0 .getField("subField").schema();
+        this.recordsMap0 = readerSchema.getField("recordsMap").schema();
+        this.recordsArrayUnion0 = readerSchema.getField("recordsArrayUnion").schema();
+        this.recordsArrayUnionOptionSchema0 = recordsArrayUnion0 .getTypes().get(1);
+        this.recordsArrayUnionOptionArrayElemSchema0 = recordsArrayUnionOptionSchema0 .getElementType();
+        this.recordsMapUnion0 = readerSchema.getField("recordsMapUnion").schema();
+        this.recordsMapUnionOptionSchema0 = recordsMapUnion0 .getTypes().get(1);
+        this.recordsMapUnionOptionMapValueSchema0 = recordsMapUnionOptionSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<IndexedRecord> recordsArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArray1 = ((List) oldArray0);
+            recordsArray1 .clear();
+        } else {
+            recordsArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordsArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(0, recordsArray1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayArrayElemSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> recordsMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap1 = recordsMapReuse0;
+                } else {
+                    recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), 0));
+            } else {
+                recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(1, recordsMap1);
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, null);
+        } else {
+            if (unionIndex1 == 1) {
+                List<IndexedRecord> recordsArrayUnionOption0 = null;
+                long chunkLen2 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray1);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen2), recordsArrayUnionOptionSchema0);
+                }
+                while (chunkLen2 > 0) {
+                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        int unionIndex2 = (decoder.readIndex());
+                        if (unionIndex2 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex2 == 1) {
+                                recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex2));
+                            }
+                        }
+                    }
+                    chunkLen2 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Map<Utf8, IndexedRecord> recordsMapUnionOption0 = null;
+                long chunkLen3 = (decoder.readMapStart());
+                if (chunkLen3 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), ((int) chunkLen3)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex4 = (decoder.readIndex());
+                            if (unionIndex4 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex4 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex4));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.mapNext());
+                    } while (chunkLen3 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
new file mode 100644
index 000000000..3cb65717a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
@@ -0,0 +1,378 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArrayMap0;
+    private final Schema recordsArrayMapArrayElemSchema0;
+    private final Schema recordsArrayMapElemMapValueSchema0;
+    private final Schema recordsArrayMapElemValueOptionSchema0;
+    private final Schema subField0;
+    private final Schema recordsMapArray0;
+    private final Schema recordsMapArrayMapValueSchema0;
+    private final Schema recordsMapArrayValueArrayElemSchema0;
+    private final Schema recordsArrayMapUnion0;
+    private final Schema recordsArrayMapUnionOptionArrayElemSchema0;
+    private final Schema recordsArrayMapUnionOptionElemMapValueSchema0;
+    private final Schema recordsMapArrayUnion0;
+    private final Schema recordsMapArrayUnionOptionSchema0;
+    private final Schema recordsMapArrayUnionOptionValueArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArrayMap0 = readerSchema.getField("recordsArrayMap").schema();
+        this.recordsArrayMapArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapElemMapValueSchema0 = recordsArrayMapArrayElemSchema0 .getValueType();
+        this.recordsArrayMapElemValueOptionSchema0 = recordsArrayMapElemMapValueSchema0 .getTypes().get(1);
+        this.subField0 = recordsArrayMapElemValueOptionSchema0 .getField("subField").schema();
+        this.recordsMapArray0 = readerSchema.getField("recordsMapArray").schema();
+        this.recordsMapArrayMapValueSchema0 = recordsMapArray0 .getValueType();
+        this.recordsMapArrayValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+        this.recordsArrayMapUnion0 = readerSchema.getField("recordsArrayMapUnion").schema();
+        this.recordsArrayMapUnionOptionArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapUnionOptionElemMapValueSchema0 = recordsArrayMapUnionOptionArrayElemSchema0 .getValueType();
+        this.recordsMapArrayUnion0 = readerSchema.getField("recordsMapArrayUnion").schema();
+        this.recordsMapArrayUnionOptionSchema0 = recordsMapArrayUnion0 .getTypes().get(1);
+        this.recordsMapArrayUnionOptionValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Map<Utf8, IndexedRecord>> recordsArrayMap1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArrayMap1 = ((List) oldArray0);
+            recordsArrayMap1 .clear();
+        } else {
+            recordsArrayMap1 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen0), recordsArrayMap0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Map<Utf8, IndexedRecord> recordsArrayMapElem0 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex0 = (decoder.readIndex());
+                            if (unionIndex0 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key0, null);
+                            } else {
+                                if (unionIndex0 == 1) {
+                                    recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex0));
+                                }
+                            }
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                recordsArrayMap1 .add(recordsArrayMapElem0);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(0, recordsArrayMap1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayMapElemValueOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayMapElemValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<IndexedRecord>> recordsMapArray1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray1 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    List<IndexedRecord> recordsMapArrayValue0 = null;
+                    long chunkLen3 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen3), recordsMapArrayMapValueSchema0);
+                    }
+                    while (chunkLen3 > 0) {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex2 = (decoder.readIndex());
+                            if (unionIndex2 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex2 == 1) {
+                                    recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex2));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.arrayNext());
+                    }
+                    recordsMapArray1 .put(key1, recordsMapArrayValue0);
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), 0));
+            } else {
+                recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(1, recordsMapArray1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                List<Map<Utf8, IndexedRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray1);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen4), recordsArrayMap0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen5 = (decoder.readMapStart());
+                        if (chunkLen5 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen5)));
+                            } else {
+                                Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                                    Utf8 key2 = (decoder.readString(null));
+                                    int unionIndex4 = (decoder.readIndex());
+                                    if (unionIndex4 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key2, null);
+                                    } else {
+                                        if (unionIndex4 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex4));
+                                        }
+                                    }
+                                }
+                                chunkLen5 = (decoder.mapNext());
+                            } while (chunkLen5 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readMapStart());
+                if (chunkLen6 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), ((int) chunkLen6)));
+                    } else {
+                        Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            List<IndexedRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen7 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen7), recordsMapArrayMapValueSchema0);
+                            }
+                            while (chunkLen7 > 0) {
+                                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex6 = (decoder.readIndex());
+                                    if (unionIndex6 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex6 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex6));
+                                        }
+                                    }
+                                }
+                                chunkLen7 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key3, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen6 = (decoder.mapNext());
+                    } while (chunkLen6 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
new file mode 100644
index 000000000..406daccef
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record0;
+    private final Schema recordOptionSchema0;
+    private final Schema subField0;
+    private final Schema field0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record0 = readerSchema.getField("record").schema();
+        this.recordOptionSchema0 = record0 .getTypes().get(1);
+        this.subField0 = recordOptionSchema0 .getField("subField").schema();
+        this.field0 = readerSchema.getField("field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'record': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder), (customization)));
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(2);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
new file mode 100644
index 000000000..f196fafd1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
@@ -0,0 +1,252 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testNotRemoved0;
+    private final Schema testNotRemoved20;
+    private final Schema subRecord0;
+    private final Schema subRecordOptionSchema0;
+    private final Schema testNotRemoved1;
+    private final Schema testNotRemoved21;
+    private final Schema subRecordMap0;
+    private final Schema subRecordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testNotRemoved0 = readerSchema.getField("testNotRemoved").schema();
+        this.testNotRemoved20 = readerSchema.getField("testNotRemoved2").schema();
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordOptionSchema0 = subRecord0 .getTypes().get(1);
+        this.testNotRemoved1 = subRecordOptionSchema0 .getField("testNotRemoved").schema();
+        this.testNotRemoved21 = subRecordOptionSchema0 .getField("testNotRemoved2").schema();
+        this.subRecordMap0 = readerSchema.getField("subRecordMap").schema();
+        this.subRecordArray0 = readerSchema.getField("subRecordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex3));
+            }
+        }
+        Map<Utf8, IndexedRecord> subRecordMap1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
+                if (oldMap0 instanceof Map) {
+                    subRecordMapReuse0 = ((Map) oldMap0);
+                }
+                if (subRecordMapReuse0 != (null)) {
+                    subRecordMapReuse0 .clear();
+                    subRecordMap1 = subRecordMapReuse0;
+                } else {
+                    subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), 0));
+            } else {
+                subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(3, subRecordMap1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordOptionSchema0);
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = subRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex4));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex5 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = subRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<IndexedRecord> subRecordArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(4);
+        if (oldArray0 instanceof List) {
+            subRecordArray1 = ((List) oldArray0);
+            subRecordArray1 .clear();
+        } else {
+            subRecordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen1), subRecordArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object subRecordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    subRecordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(4, subRecordArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
new file mode 100644
index 000000000..fdfbefc18
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder), (customization)));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubSubRecord0(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subSubRecord0((decoder));
+    }
+
+    private void populate_subSubRecord0(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
new file mode 100644
index 000000000..2e9ed90b7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord10;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord10 = readerSchema.getField("subRecord1").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord10);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubRecord20(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubRecord20(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subRecord20((decoder));
+    }
+
+    private void populate_subRecord20(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder), (customization)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
new file mode 100644
index 000000000..5dd0a56cf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
new file mode 100644
index 000000000..4732caebf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
new file mode 100644
index 000000000..9425e4e38
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException("Found \"long\", expecting [\"null\", \"string\"]");
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
new file mode 100644
index 000000000..269467a74
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
new file mode 100644
index 000000000..dea694bbc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
new file mode 100644
index 000000000..2b482c9b5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
new file mode 100644
index 000000000..652b6df84
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
new file mode 100644
index 000000000..397323d34
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
new file mode 100644
index 000000000..d5555accd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
new file mode 100644
index 000000000..701af69be
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
new file mode 100644
index 000000000..960235584
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
new file mode 100644
index 000000000..7be5837ce
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
new file mode 100644
index 000000000..30cbef2a3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
new file mode 100644
index 000000000..d2526e5b7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
new file mode 100644
index 000000000..a3198ff04
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
new file mode 100644
index 000000000..0073d95f1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
new file mode 100644
index 000000000..78db76ccd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
new file mode 100644
index 000000000..ed1be6564
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
new file mode 100644
index 000000000..27e37778c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
new file mode 100644
index 000000000..858f62ae3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
new file mode 100644
index 000000000..51c12e833
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(2);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
new file mode 100644
index 000000000..1085301ae
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
new file mode 100644
index 000000000..db6ef95ef
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(2);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
new file mode 100644
index 000000000..6f1ca2ef5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
new file mode 100644
index 000000000..b2dc6214d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
@@ -0,0 +1,148 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
new file mode 100644
index 000000000..b2191c04d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
@@ -0,0 +1,130 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
new file mode 100644
index 000000000..4364e0e88
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
@@ -0,0 +1,130 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            testStringArray1 .clear();
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
new file mode 100644
index 000000000..71ee175cd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
@@ -0,0 +1,1071 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
new file mode 100644
index 000000000..f1a8f576b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericDeserializer_2140000109_2140000109
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema mapValueOptionSchema0;
+    private final Schema field0;
+
+    public Map_of_UNION_GenericDeserializer_2140000109_2140000109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.mapValueOptionSchema0 = mapMapValueSchema0 .getTypes().get(1);
+        this.field0 = mapValueOptionSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapValueOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_UNION_SpecificDeserializer_971650236_971650236.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
new file mode 100644
index 000000000..bee8d45c3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
@@ -0,0 +1,1081 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_SpecificDeserializer_971650236_971650236
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_UNION_SpecificDeserializer_971650236_971650236(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_record_GenericDeserializer_1223705675_568621313.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_record_GenericDeserializer_1223705675_568621313.java
new file mode 100644
index 000000000..2e7c05ca1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_record_GenericDeserializer_1223705675_568621313.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1223705675_568621313
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionMapValueSchema0;
+
+    public Map_of_record_GenericDeserializer_1223705675_568621313(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionMapValueSchema0 = readerSchema.getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
+                        if ((reuse) instanceof Map) {
+                            unionOptionReuse0 = ((Map)(reuse));
+                        }
+                        if (unionOptionReuse0 != (null)) {
+                            unionOptionReuse0 .clear();
+                            unionOption0 = unionOptionReuse0;
+                        } else {
+                            unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            unionOption0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+                    } else {
+                        unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_record_GenericDeserializer_1677529043_1677529043.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_record_GenericDeserializer_1677529043_1677529043.java
new file mode 100644
index 000000000..281fe9212
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/Map_of_record_GenericDeserializer_1677529043_1677529043.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1677529043_1677529043
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema field0;
+
+    public Map_of_record_GenericDeserializer_1677529043_1677529043(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.field0 = mapMapValueSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
new file mode 100644
index 000000000..e804ac3e0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField>
+{
+
+    private final Schema readerSchema;
+
+    public RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRecordWithLargeUnionField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField RecordWithLargeUnionField;
+        if ((reuse)!= null) {
+            RecordWithLargeUnionField = ((com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField)(reuse));
+        } else {
+            RecordWithLargeUnionField = new com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Utf8 charSequence0;
+            Object oldString0 = RecordWithLargeUnionField.get(0);
+            if (oldString0 instanceof Utf8) {
+                charSequence0 = (decoder).readString(((Utf8) oldString0));
+            } else {
+                charSequence0 = (decoder).readString(null);
+            }
+            RecordWithLargeUnionField.put(0, charSequence0);
+        } else {
+            if (unionIndex0 == 1) {
+                RecordWithLargeUnionField.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException(new StringBuilder().append("Found").append(" \"byt").append("es\", ").append("expec").append("ting ").append("[\"str").append("ing\",").append(" \"int").append("\"]").toString());
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+                }
+            }
+        }
+        return RecordWithLargeUnionField;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
new file mode 100644
index 000000000..a9a4c0da3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        return RemovedTypesTestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
new file mode 100644
index 000000000..bee5afceb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
@@ -0,0 +1,406 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord3((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord4((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord5((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord6((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord7((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord8((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord9((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord10((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord11((RemovedTypesTestRecord), (customization), (decoder));
+        return RemovedTypesTestRecord;
+    }
+
+    private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipBytes();
+        long chunkLen0 = (decoder.readArrayStart());
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object removedBytesArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipBytes();
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.skipBytes();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedBytesUnion': "+ unionIndex0));
+            }
+        }
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    decoder.skipBytes();
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen2 = (decoder.readArrayStart());
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object removedBytesUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex1 == 1) {
+                        decoder.skipBytes();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedBytesUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex2 = (decoder.readIndex());
+                    if (unionIndex2 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex2 == 1) {
+                            decoder.skipBytes();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedBytesUnionMapValue': "+ unionIndex2));
+                        }
+                    }
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipFixed(1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex3 == 1) {
+                decoder.skipFixed(1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedFixedUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen4 = (decoder.readArrayStart());
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object removedFixedArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipFixed(1);
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    decoder.skipFixed(1);
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen6 = (decoder.readArrayStart());
+        while (chunkLen6 > 0) {
+            for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                Object removedFixedUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex4 = (decoder.readIndex());
+                if (unionIndex4 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex4 == 1) {
+                        decoder.skipFixed(1);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedFixedUnionArrayElem': "+ unionIndex4));
+                    }
+                }
+            }
+            chunkLen6 = (decoder.arrayNext());
+        }
+        long chunkLen7 = (decoder.readMapStart());
+        if (chunkLen7 > 0) {
+            do {
+                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    int unionIndex5 = (decoder.readIndex());
+                    if (unionIndex5 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex5 == 1) {
+                            decoder.skipFixed(1);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedFixedUnionMapValue': "+ unionIndex5));
+                        }
+                    }
+                }
+                chunkLen7 = (decoder.mapNext());
+            } while (chunkLen7 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.readEnum();
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.readEnum();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedEnumUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen8 = (decoder.readArrayStart());
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                decoder.readEnum();
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        long chunkLen9 = (decoder.readMapStart());
+        if (chunkLen9 > 0) {
+            do {
+                for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    decoder.readEnum();
+                }
+                chunkLen9 = (decoder.mapNext());
+            } while (chunkLen9 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen10 = (decoder.readArrayStart());
+        while (chunkLen10 > 0) {
+            for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                Object removedEnumUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex7 = (decoder.readIndex());
+                if (unionIndex7 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex7 == 1) {
+                        decoder.readEnum();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedEnumUnionArrayElem': "+ unionIndex7));
+                    }
+                }
+            }
+            chunkLen10 = (decoder.arrayNext());
+        }
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key5 = (decoder.readString(null));
+                    int unionIndex8 = (decoder.readIndex());
+                    if (unionIndex8 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex8 == 1) {
+                            decoder.readEnum();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedEnumUnionMapValue': "+ unionIndex8));
+                        }
+                    }
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializeRemovedSubRecord0(null, (decoder), (customization));
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex9 == 1) {
+                deserializeRemovedSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedSubRecordUnion': "+ unionIndex9));
+            }
+        }
+    }
+
+    public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen12 = (decoder.readArrayStart());
+        while (chunkLen12 > 0) {
+            for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                Object removedSubRecordArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder), (customization));
+            }
+            chunkLen12 = (decoder.arrayNext());
+        }
+        long chunkLen13 = (decoder.readArrayStart());
+        while (chunkLen13 > 0) {
+            for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                Object removedSubRecordUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex10 == 1) {
+                        deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder), (customization));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen13 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen14 = (decoder.readMapStart());
+        if (chunkLen14 > 0) {
+            do {
+                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                    Utf8 key6 = (decoder.readString(null));
+                    deserializeRemovedSubRecord0(null, (decoder), (customization));
+                }
+                chunkLen14 = (decoder.mapNext());
+            } while (chunkLen14 > 0);
+        }
+        long chunkLen15 = (decoder.readMapStart());
+        if (chunkLen15 > 0) {
+            do {
+                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                    Utf8 key7 = (decoder.readString(null));
+                    int unionIndex11 = (decoder.readIndex());
+                    if (unionIndex11 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex11 == 1) {
+                            deserializeRemovedSubRecord0(null, (decoder), (customization));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionMapValue': "+ unionIndex11));
+                        }
+                    }
+                }
+                chunkLen15 = (decoder.mapNext());
+            } while (chunkLen15 > 0);
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
new file mode 100644
index 000000000..4c21188b2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
@@ -0,0 +1,172 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest1_SpecificDeserializer_1718878379_595582209
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest1_SpecificDeserializer_1718878379_595582209(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSplitRecordTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1;
+        if ((reuse)!= null) {
+            SplitRecordTest1 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1)(reuse));
+        } else {
+            SplitRecordTest1 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1();
+        }
+        SplitRecordTest1 .put(0, deserializeFullRecord0(SplitRecordTest1 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest10((SplitRecordTest1), (customization), (decoder));
+        return SplitRecordTest1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FullRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        FullRecord.put(1, null);
+        return FullRecord;
+    }
+
+    private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest1 .put(1, deserializeFullRecord1(SplitRecordTest1 .get(1), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest1 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            record30 .clear();
+        } else {
+            record30 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord2(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest1 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+        FullRecord.put(0, null);
+        return FullRecord;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord2(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FullRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_FullRecord0((FullRecord), (customization), (decoder));
+        return FullRecord;
+    }
+
+    private void populate_FullRecord0(com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
new file mode 100644
index 000000000..cdd16c45b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
@@ -0,0 +1,204 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FullRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringRecord;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest2_SpecificDeserializer_595582209_1718878379
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest2_SpecificDeserializer_595582209_1718878379(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest20((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSplitRecordTest20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2;
+        if ((reuse)!= null) {
+            SplitRecordTest2 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2)(reuse));
+        } else {
+            SplitRecordTest2 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2();
+        }
+        SplitRecordTest2 .put(0, deserializeStringRecord0(SplitRecordTest2 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest20((SplitRecordTest2), (customization), (decoder));
+        return SplitRecordTest2;
+    }
+
+    public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        StringRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((StringRecord)(reuse));
+        } else {
+            IntRecord = new StringRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = IntRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        populate_IntRecord0((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord0(StringRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest2 .put(1, deserializeIntRecord0(SplitRecordTest2 .get(1), (decoder), (customization)));
+        List<FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest2 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            record30 .clear();
+        } else {
+            record30 = new ArrayList<FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord0(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest2 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((com.linkedin.avro.fastserde.generated.avro.IntRecord)(reuse));
+        } else {
+            IntRecord = new com.linkedin.avro.fastserde.generated.avro.IntRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex2 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_IntRecord1((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex3 == 1) {
+                IntRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+    public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        FullRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((FullRecord)(reuse));
+        } else {
+            IntRecord = new FullRecord();
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = IntRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex4));
+            }
+        }
+        populate_IntRecord2((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord2(FullRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            IntRecord.put(1, null);
+        } else {
+            if (unionIndex5 == 1) {
+                IntRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/StringableRecord_SpecificDeserializer_842267318_842267318.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/StringableRecord_SpecificDeserializer_842267318_842267318.java
new file mode 100644
index 000000000..939baff1a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/StringableRecord_SpecificDeserializer_842267318_842267318.java
@@ -0,0 +1,224 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroRuntimeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificDeserializer_842267318_842267318
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.StringableRecord>
+{
+
+    private final Schema readerSchema;
+
+    public StringableRecord_SpecificDeserializer_842267318_842267318(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        try {
+            return deserializeStringableRecord0((reuse), (decoder), (customization));
+        } catch (NumberFormatException e) {
+            throw new AvroRuntimeException(e);
+        } catch (MalformedURLException e) {
+            throw new AvroRuntimeException(e);
+        } catch (URISyntaxException e) {
+            throw new AvroRuntimeException(e);
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord;
+        if ((reuse)!= null) {
+            StringableRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableRecord)(reuse));
+        } else {
+            StringableRecord = new com.linkedin.avro.fastserde.generated.avro.StringableRecord();
+        }
+        BigInteger charSequence0 = new BigInteger((decoder.readString()));
+        StringableRecord.put(0, charSequence0);
+        populate_StringableRecord0((StringableRecord), (customization), (decoder));
+        populate_StringableRecord1((StringableRecord), (customization), (decoder));
+        populate_StringableRecord2((StringableRecord), (customization), (decoder));
+        populate_StringableRecord3((StringableRecord), (customization), (decoder));
+        populate_StringableRecord4((StringableRecord), (customization), (decoder));
+        return StringableRecord;
+    }
+
+    private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, URISyntaxException
+    {
+        BigDecimal charSequence1 = new BigDecimal((decoder.readString()));
+        StringableRecord.put(1, charSequence1);
+        URI charSequence2 = new URI((decoder.readString()));
+        StringableRecord.put(2, charSequence2);
+    }
+
+    private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        URL charSequence3 = new URL((decoder.readString()));
+        StringableRecord.put(3, charSequence3);
+        File charSequence4 = new File((decoder.readString()));
+        StringableRecord.put(4, charSequence4);
+    }
+
+    private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        List<URL> urlArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = StringableRecord.get(5);
+        if (oldArray0 instanceof List) {
+            urlArray0 = ((List) oldArray0);
+            urlArray0 .clear();
+        } else {
+            urlArray0 = new ArrayList<URL>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object urlArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    urlArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                URL charSequence5 = new URL((decoder.readString()));
+                urlArray0 .add(charSequence5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        StringableRecord.put(5, urlArray0);
+        Map<URL, BigInteger> urlMap0 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), ((int) chunkLen1)));
+            } else {
+                Map<URL, BigInteger> urlMapReuse0 = null;
+                Object oldMap0 = StringableRecord.get(6);
+                if (oldMap0 instanceof Map) {
+                    urlMapReuse0 = ((Map) oldMap0);
+                }
+                if (urlMapReuse0 != (null)) {
+                    urlMapReuse0 .clear();
+                    urlMap0 = urlMapReuse0;
+                } else {
+                    urlMap0 = new HashMap<URL, BigInteger>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    URL key0 = new URL((decoder.readString()));
+                    BigInteger charSequence6 = new BigInteger((decoder.readString()));
+                    urlMap0 .put(key0, charSequence6);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), 0));
+            } else {
+                urlMap0 = new HashMap<URL, BigInteger>(0);
+            }
+        }
+        StringableRecord.put(6, urlMap0);
+    }
+
+    private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        StringableRecord.put(7, deserializeStringableSubRecord0(StringableRecord.get(7), (decoder), (customization)));
+        StringableRecord.put(8, deserializeAnotherSubRecord0(StringableRecord.get(8), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord;
+        if ((reuse)!= null) {
+            StringableSubRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableSubRecord)(reuse));
+        } else {
+            StringableSubRecord = new com.linkedin.avro.fastserde.generated.avro.StringableSubRecord();
+        }
+        URI charSequence7 = new URI((decoder.readString()));
+        StringableSubRecord.put(0, charSequence7);
+        populate_StringableSubRecord0((StringableSubRecord), (customization), (decoder));
+        return StringableSubRecord;
+    }
+
+    private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, URISyntaxException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            StringableSubRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence8;
+                Object oldString0 = StringableSubRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                StringableSubRecord.put(1, charSequence8);
+            } else {
+                if (unionIndex0 == 2) {
+                    StringableSubRecord.put(1, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullStringIntUnion': "+ unionIndex0));
+                }
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord AnotherSubRecord;
+        if ((reuse)!= null) {
+            AnotherSubRecord = ((com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord)(reuse));
+        } else {
+            AnotherSubRecord = new com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord();
+        }
+        AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder), (customization)));
+        return AnotherSubRecord;
+    }
+
+    private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            StringableRecord.put(9, null);
+        } else {
+            if (unionIndex1 == 1) {
+                String charSequence9 = (decoder).readString();
+                StringableRecord.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'stringUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
new file mode 100644
index 000000000..904018c57
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
@@ -0,0 +1,46 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class TestArrayOfFloats_GenericDeserializer_1408566797_1408566797
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema array_of_float0;
+
+    public TestArrayOfFloats_GenericDeserializer_1408566797_1408566797(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.array_of_float0 = readerSchema.getField("array_of_float").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestArrayOfFloats0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestArrayOfFloats;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestArrayOfFloats = ((IndexedRecord)(reuse));
+        } else {
+            TestArrayOfFloats = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveFloatList array_of_float1 = null;
+        array_of_float1 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestArrayOfFloats.get(0), (decoder)));
+        TestArrayOfFloats.put(0, array_of_float1);
+        return TestArrayOfFloats;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_GenericDeserializer_473555078_473555078.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_GenericDeserializer_473555078_473555078.java
new file mode 100644
index 000000000..6b5678f41
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_GenericDeserializer_473555078_473555078.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_GenericDeserializer_473555078_473555078
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema map_field0;
+
+    public TestRecord_GenericDeserializer_473555078_473555078(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.map_field0 = readerSchema.getField("map_field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestRecord = ((IndexedRecord)(reuse));
+        } else {
+            TestRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Utf8> map_field1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Utf8> map_fieldReuse0 = null;
+                Object oldMap0 = TestRecord.get(0);
+                if (oldMap0 instanceof Map) {
+                    map_fieldReuse0 = ((Map) oldMap0);
+                }
+                if (map_fieldReuse0 != (null)) {
+                    map_fieldReuse0 .clear();
+                    map_field1 = map_fieldReuse0;
+                } else {
+                    map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence0 = (decoder).readString(null);
+                    map_field1 .put(key0, charSequence0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), 0));
+            } else {
+                map_field1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        TestRecord.put(0, map_field1);
+        return TestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_1898726132_553331077.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_1898726132_553331077.java
new file mode 100644
index 000000000..39625df3e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_1898726132_553331077.java
@@ -0,0 +1,1039 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1898726132_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1898726132_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_1991094399_553331077.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_1991094399_553331077.java
new file mode 100644
index 000000000..9172e15da
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_1991094399_553331077.java
@@ -0,0 +1,1043 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1991094399_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1991094399_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(6);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        tempEnumMapping0 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(6);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        tempEnumMapping1 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(6);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        tempEnumMapping2 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(6);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        tempEnumMapping3 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_553331077_553331077.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_553331077_553331077.java
new file mode 100644
index 000000000..5ef4188dc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/TestRecord_SpecificDeserializer_553331077_553331077.java
@@ -0,0 +1,1040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_553331077_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public TestRecord_SpecificDeserializer_553331077_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            testFixedArray0 .clear();
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            testFixedUnionArray0 .clear();
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            testEnumArray0 .clear();
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            testEnumUnionArray0 .clear();
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            recordsArray0 .clear();
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    recordsArrayUnionOption0 .clear();
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            recordsArrayMap0 .clear();
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        recordsMapArrayValue0 .clear();
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    recordsArrayMapUnionOption0 .clear();
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                recordsMapArrayUnionOptionValue0 .clear();
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen16 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen16));
+        }
+        while (chunkLen16 > 0) {
+            for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen16 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            stringArray0 .clear();
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_1971822364_1672473580.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_1971822364_1672473580.java
new file mode 100644
index 000000000..a75788112
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_1971822364_1672473580.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_1971822364_1672473580
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordRecordSchema0;
+
+    public UNION_GenericDeserializer_1971822364_1672473580(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordRecordSchema0 = readerSchema.getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordRecordSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(recordRecordSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_2018567528_1606337179.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_2018567528_1606337179.java
new file mode 100644
index 000000000..56842e7b8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_2018567528_1606337179.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_2018567528_1606337179
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArraySchema0;
+    private final Schema arrayArrayElemSchema0;
+
+    public UNION_GenericDeserializer_2018567528_1606337179(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArraySchema0 = readerSchema.getTypes().get(1);
+        this.arrayArrayElemSchema0 = arrayArraySchema0 .getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), arrayArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_568621313_1223705675.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_568621313_1223705675.java
new file mode 100644
index 000000000..5b07b50cb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UNION_GenericDeserializer_568621313_1223705675.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class UNION_GenericDeserializer_568621313_1223705675
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapSchema0;
+    private final Schema mapMapValueSchema0;
+
+    public UNION_GenericDeserializer_568621313_1223705675(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapSchema0 = readerSchema.getTypes().get(1);
+        this.mapMapValueSchema0 = mapMapSchema0 .getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
new file mode 100644
index 000000000..8391d6529
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV1;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV2;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField>
+{
+
+    private final Schema readerSchema;
+
+    public UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeUnionOfRecordsWithSameNameEnumField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField UnionOfRecordsWithSameNameEnumField;
+        if ((reuse)!= null) {
+            UnionOfRecordsWithSameNameEnumField = ((com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField)(reuse));
+        } else {
+            UnionOfRecordsWithSameNameEnumField = new com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+        return UnionOfRecordsWithSameNameEnumField;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV1 MyRecordV1;
+        if ((reuse)!= null) {
+            MyRecordV1 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV1)(reuse));
+        } else {
+            MyRecordV1 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV1();
+        }
+        MyRecordV1 .put(0, Enums.getConstant(MyEnumV1 .class, (decoder.readEnum())));
+        return MyRecordV1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV2 MyRecordV2;
+        if ((reuse)!= null) {
+            MyRecordV2 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV2)(reuse));
+        } else {
+            MyRecordV2 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV2();
+        }
+        MyRecordV2 .put(0, Enums.getConstant(MyEnumV2 .class, (decoder.readEnum())));
+        return MyRecordV2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/recordName_GenericDeserializer_1743054079_1743054079.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/recordName_GenericDeserializer_1743054079_1743054079.java
new file mode 100644
index 000000000..10e3a74d2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/recordName_GenericDeserializer_1743054079_1743054079.java
@@ -0,0 +1,67 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class recordName_GenericDeserializer_1743054079_1743054079
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionField0;
+
+    public recordName_GenericDeserializer_1743054079_1743054079(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionField0 = readerSchema.getField("unionField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecordName0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord recordName;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            recordName = ((IndexedRecord)(reuse));
+        } else {
+            recordName = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = recordName.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        recordName.put(0, charSequence0);
+        populate_recordName0((recordName), (customization), (decoder));
+        return recordName;
+    }
+
+    private void populate_recordName0(IndexedRecord recordName, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            recordName.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                recordName.put(1, deserializerecordName0(recordName.get(1), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1025741720_1557256887.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1025741720_1557256887.java
new file mode 100644
index 000000000..e440eefcd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1025741720_1557256887.java
@@ -0,0 +1,96 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1025741720_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1025741720_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex1 = (decoder.readIndex());
+                            if (unionIndex1 == 0) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                if (unionIndex1 == 1) {
+                                    someIntsOption0 .put(key0, (decoder.readInt()));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'someIntsOptionValue': "+ unionIndex1));
+                                }
+                            }
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1126840752_2099305627.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1126840752_2099305627.java
new file mode 100644
index 000000000..44b3945ba
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1126840752_2099305627.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1126840752_2099305627
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1126840752_2099305627(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            if (unionIndex0 == 1) {
+                throw new AvroTypeException("Found \"string\", expecting \"int\"");
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someField': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1191367445_653449771.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1191367445_653449771.java
new file mode 100644
index 000000000..4ed205b75
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1191367445_653449771.java
@@ -0,0 +1,69 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1191367445_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1191367445_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        someIntsOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1373882843_1971822364.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1373882843_1971822364.java
new file mode 100644
index 000000000..93d8eda3a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1373882843_1971822364.java
@@ -0,0 +1,45 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1373882843_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1373882843_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            throw new RuntimeException(("Illegal union index for 'someInt': "+ unionIndex0));
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1556659421_711533897.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1556659421_711533897.java
new file mode 100644
index 000000000..c00ef0d0f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1556659421_711533897.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1556659421_711533897
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public record_GenericDeserializer_1556659421_711533897(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"subRecord\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"subRecord\",\"fields\":[{\"name\":\"someInt1\",\"type\":\"int\",\"doc\":\"\"},{\"name\":\"someInt2\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1557256887_1025741720.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1557256887_1025741720.java
new file mode 100644
index 000000000..c9ecf507c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1557256887_1025741720.java
@@ -0,0 +1,81 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_1025741720
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+    private final Schema someIntsMapValueSchema0;
+
+    public record_GenericDeserializer_1557256887_1025741720(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+        this.someIntsMapValueSchema0 = someIntsMapSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1557256887_753570467.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1557256887_753570467.java
new file mode 100644
index 000000000..a034b7652
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1557256887_753570467.java
@@ -0,0 +1,79 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_753570467
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+
+    public record_GenericDeserializer_1557256887_753570467(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1672473580_1971822364.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1672473580_1971822364.java
new file mode 100644
index 000000000..09cd58ed8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1672473580_1971822364.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1672473580_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1672473580_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                return deserializerecord0((reuse), (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1971822364_1373882843.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1971822364_1373882843.java
new file mode 100644
index 000000000..7d59e4519
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_1971822364_1373882843.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1971822364_1373882843
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInt0;
+
+    public record_GenericDeserializer_1971822364_1373882843(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInt0 = readerSchema.getField("someInt").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_653449771_1191367445.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_653449771_1191367445.java
new file mode 100644
index 000000000..0ba8d37e5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_653449771_1191367445.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_1191367445
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+
+    public record_GenericDeserializer_653449771_1191367445(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveIntList someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof PrimitiveIntList) {
+            someInts1 = ((PrimitiveIntList) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_653449771_813379571.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_653449771_813379571.java
new file mode 100644
index 000000000..82f9751bd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_653449771_813379571.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_813379571
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+    private final Schema someIntsArrayElemSchema0;
+
+    public record_GenericDeserializer_653449771_813379571(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+        this.someIntsArrayElemSchema0 = someIntsArraySchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof List) {
+            someInts1 = ((List) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new org.apache.avro.generic.GenericData.Array<Integer>(((int) chunkLen0), someIntsArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .add((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_711533897_1556659421.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_711533897_1556659421.java
new file mode 100644
index 000000000..0ea3818e7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_711533897_1556659421.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_711533897_1556659421
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+    private final Schema subRecordRecordSchema0;
+
+    public record_GenericDeserializer_711533897_1556659421(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordRecordSchema0 = subRecord0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordRecordSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordRecordSchema0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_753570467_1557256887.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_753570467_1557256887.java
new file mode 100644
index 000000000..175afef9b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_753570467_1557256887.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_753570467_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_753570467_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            someIntsOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_813379571_653449771.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_813379571_653449771.java
new file mode 100644
index 000000000..c2e97a298
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/record_GenericDeserializer_813379571_653449771.java
@@ -0,0 +1,83 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_813379571_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_813379571_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object someIntsOptionArrayElementReuseVar0 = null;
+                        if (oldArray0 instanceof GenericArray) {
+                            someIntsOptionArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                        }
+                        int unionIndex1 = (decoder.readIndex());
+                        if (unionIndex1 == 0) {
+                            someIntsOption0 .addPrimitive((decoder.readInt()));
+                        } else {
+                            if (unionIndex1 == 1) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'someIntsOptionElem': "+ unionIndex1));
+                            }
+                        }
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/testRecord_GenericDeserializer_1146484089_1256982207.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/testRecord_GenericDeserializer_1146484089_1256982207.java
new file mode 100644
index 000000000..6238c4816
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_8/testRecord_GenericDeserializer_1146484089_1256982207.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class testRecord_GenericDeserializer_1146484089_1256982207
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+
+    public testRecord_GenericDeserializer_1146484089_1256982207(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.testEnum: No match for C"));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializetestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord testRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            testRecord = ((IndexedRecord)(reuse));
+        } else {
+            testRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        testRecord.put(0, enumValue0);
+        return testRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_BOOLEAN_GenericSerializer_869749973.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_BOOLEAN_GenericSerializer_869749973.java
new file mode 100644
index 000000000..0c530e129
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_BOOLEAN_GenericSerializer_869749973.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_BOOLEAN_GenericSerializer_869749973
+    implements FastSerializer<List<Boolean>>
+{
+
+
+    public void serialize(List<Boolean> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveBooleanList) {
+                PrimitiveBooleanList primitiveList0 = ((PrimitiveBooleanList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_DOUBLE_GenericSerializer_18760307.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_DOUBLE_GenericSerializer_18760307.java
new file mode 100644
index 000000000..b5419fb3b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_DOUBLE_GenericSerializer_18760307.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_DOUBLE_GenericSerializer_18760307
+    implements FastSerializer<List<Double>>
+{
+
+
+    public void serialize(List<Double> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveDoubleList) {
+                PrimitiveDoubleList primitiveList0 = ((PrimitiveDoubleList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_FLOAT_GenericSerializer_1012670397.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_FLOAT_GenericSerializer_1012670397.java
new file mode 100644
index 000000000..258bf3b7b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_FLOAT_GenericSerializer_1012670397.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_FLOAT_GenericSerializer_1012670397
+    implements FastSerializer<List<Float>>
+{
+
+
+    public void serialize(List<Float> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_INT_GenericSerializer_1012089072.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_INT_GenericSerializer_1012089072.java
new file mode 100644
index 000000000..ccc5177e0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_INT_GenericSerializer_1012089072.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_INT_GenericSerializer_1012089072
+    implements FastSerializer<List<Integer>>
+{
+
+
+    public void serialize(List<Integer> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_LONG_GenericSerializer_325099267.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_LONG_GenericSerializer_325099267.java
new file mode 100644
index 000000000..bf4393294
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_LONG_GenericSerializer_325099267.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_LONG_GenericSerializer_325099267
+    implements FastSerializer<List<Long>>
+{
+
+
+    public void serialize(List<Long> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveLongList) {
+                PrimitiveLongList primitiveList0 = ((PrimitiveLongList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_UNION_GenericSerializer_777827233.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_UNION_GenericSerializer_777827233.java
new file mode 100644
index 000000000..2c060aa4f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_UNION_GenericSerializer_777827233.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericSerializer_777827233
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord union0 = null;
+                union0 = ((List<IndexedRecord> ) data).get(counter0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_record_GenericSerializer_477614132.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_record_GenericSerializer_477614132.java
new file mode 100644
index 000000000..f1fb02d4b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Array_of_record_GenericSerializer_477614132.java
@@ -0,0 +1,53 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericSerializer_477614132
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord record0 = null;
+                record0 = ((List<IndexedRecord> ) data).get(counter0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
new file mode 100644
index 000000000..cf928b2c1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
@@ -0,0 +1,4527 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        (encoder).writeInt(((Integer) data.get(2)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(3)));
+        (encoder).writeInt(((Integer) data.get(4)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(5)));
+        (encoder).writeInt(((Integer) data.get(6)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(7)));
+        (encoder).writeInt(((Integer) data.get(8)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(9)));
+        (encoder).writeInt(((Integer) data.get(10)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(11)));
+        (encoder).writeInt(((Integer) data.get(12)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(13)));
+        (encoder).writeInt(((Integer) data.get(14)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(15)));
+        (encoder).writeInt(((Integer) data.get(16)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(17)));
+        (encoder).writeInt(((Integer) data.get(18)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(19)));
+        (encoder).writeInt(((Integer) data.get(20)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(21)));
+        (encoder).writeInt(((Integer) data.get(22)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(23)));
+        (encoder).writeInt(((Integer) data.get(24)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(25)));
+        (encoder).writeInt(((Integer) data.get(26)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(27)));
+        (encoder).writeInt(((Integer) data.get(28)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(29)));
+        (encoder).writeInt(((Integer) data.get(30)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(31)));
+        (encoder).writeInt(((Integer) data.get(32)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(33)));
+        (encoder).writeInt(((Integer) data.get(34)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(35)));
+        (encoder).writeInt(((Integer) data.get(36)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(37)));
+        (encoder).writeInt(((Integer) data.get(38)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(39)));
+        (encoder).writeInt(((Integer) data.get(40)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(41)));
+        (encoder).writeInt(((Integer) data.get(42)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(43)));
+        (encoder).writeInt(((Integer) data.get(44)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(45)));
+        (encoder).writeInt(((Integer) data.get(46)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(47)));
+        (encoder).writeInt(((Integer) data.get(48)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(49)));
+        (encoder).writeInt(((Integer) data.get(50)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(51)));
+        (encoder).writeInt(((Integer) data.get(52)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(53)));
+        (encoder).writeInt(((Integer) data.get(54)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(55)));
+        (encoder).writeInt(((Integer) data.get(56)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(57)));
+        (encoder).writeInt(((Integer) data.get(58)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(59)));
+        (encoder).writeInt(((Integer) data.get(60)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(61)));
+        (encoder).writeInt(((Integer) data.get(62)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(63)));
+        (encoder).writeInt(((Integer) data.get(64)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(65)));
+        (encoder).writeInt(((Integer) data.get(66)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(67)));
+        (encoder).writeInt(((Integer) data.get(68)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(69)));
+        (encoder).writeInt(((Integer) data.get(70)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(71)));
+        (encoder).writeInt(((Integer) data.get(72)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(73)));
+        (encoder).writeInt(((Integer) data.get(74)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(75)));
+        (encoder).writeInt(((Integer) data.get(76)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(77)));
+        (encoder).writeInt(((Integer) data.get(78)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(79)));
+        (encoder).writeInt(((Integer) data.get(80)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(81)));
+        (encoder).writeInt(((Integer) data.get(82)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(83)));
+        (encoder).writeInt(((Integer) data.get(84)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(85)));
+        (encoder).writeInt(((Integer) data.get(86)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(87)));
+        (encoder).writeInt(((Integer) data.get(88)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(89)));
+        (encoder).writeInt(((Integer) data.get(90)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(91)));
+        (encoder).writeInt(((Integer) data.get(92)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(93)));
+        (encoder).writeInt(((Integer) data.get(94)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(95)));
+        (encoder).writeInt(((Integer) data.get(96)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(97)));
+        (encoder).writeInt(((Integer) data.get(98)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(99)));
+        (encoder).writeInt(((Integer) data.get(100)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(101)));
+        (encoder).writeInt(((Integer) data.get(102)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(103)));
+        (encoder).writeInt(((Integer) data.get(104)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(105)));
+        (encoder).writeInt(((Integer) data.get(106)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(107)));
+        (encoder).writeInt(((Integer) data.get(108)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(109)));
+        (encoder).writeInt(((Integer) data.get(110)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(111)));
+        (encoder).writeInt(((Integer) data.get(112)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(113)));
+        (encoder).writeInt(((Integer) data.get(114)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(115)));
+        (encoder).writeInt(((Integer) data.get(116)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(117)));
+        (encoder).writeInt(((Integer) data.get(118)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(119)));
+        (encoder).writeInt(((Integer) data.get(120)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(121)));
+        (encoder).writeInt(((Integer) data.get(122)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(123)));
+        (encoder).writeInt(((Integer) data.get(124)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(125)));
+        (encoder).writeInt(((Integer) data.get(126)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(127)));
+        (encoder).writeInt(((Integer) data.get(128)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(129)));
+        (encoder).writeInt(((Integer) data.get(130)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(131)));
+        (encoder).writeInt(((Integer) data.get(132)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(133)));
+        (encoder).writeInt(((Integer) data.get(134)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(135)));
+        (encoder).writeInt(((Integer) data.get(136)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(137)));
+        (encoder).writeInt(((Integer) data.get(138)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(139)));
+        (encoder).writeInt(((Integer) data.get(140)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(141)));
+        (encoder).writeInt(((Integer) data.get(142)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(143)));
+        (encoder).writeInt(((Integer) data.get(144)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(145)));
+        (encoder).writeInt(((Integer) data.get(146)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(147)));
+        (encoder).writeInt(((Integer) data.get(148)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(149)));
+        (encoder).writeInt(((Integer) data.get(150)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(151)));
+        (encoder).writeInt(((Integer) data.get(152)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(153)));
+        (encoder).writeInt(((Integer) data.get(154)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(155)));
+        (encoder).writeInt(((Integer) data.get(156)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(157)));
+        (encoder).writeInt(((Integer) data.get(158)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(159)));
+        (encoder).writeInt(((Integer) data.get(160)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(161)));
+        (encoder).writeInt(((Integer) data.get(162)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(163)));
+        (encoder).writeInt(((Integer) data.get(164)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(165)));
+        (encoder).writeInt(((Integer) data.get(166)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(167)));
+        (encoder).writeInt(((Integer) data.get(168)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(169)));
+        (encoder).writeInt(((Integer) data.get(170)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(171)));
+        (encoder).writeInt(((Integer) data.get(172)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(173)));
+        (encoder).writeInt(((Integer) data.get(174)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(175)));
+        (encoder).writeInt(((Integer) data.get(176)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(177)));
+        (encoder).writeInt(((Integer) data.get(178)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(179)));
+        (encoder).writeInt(((Integer) data.get(180)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(181)));
+        (encoder).writeInt(((Integer) data.get(182)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(183)));
+        (encoder).writeInt(((Integer) data.get(184)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(185)));
+        (encoder).writeInt(((Integer) data.get(186)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(187)));
+        (encoder).writeInt(((Integer) data.get(188)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(189)));
+        (encoder).writeInt(((Integer) data.get(190)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(191)));
+        (encoder).writeInt(((Integer) data.get(192)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(193)));
+        (encoder).writeInt(((Integer) data.get(194)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(195)));
+        (encoder).writeInt(((Integer) data.get(196)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(197)));
+        (encoder).writeInt(((Integer) data.get(198)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(199)));
+        (encoder).writeInt(((Integer) data.get(200)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(201)));
+        (encoder).writeInt(((Integer) data.get(202)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(203)));
+        (encoder).writeInt(((Integer) data.get(204)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(205)));
+        (encoder).writeInt(((Integer) data.get(206)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(207)));
+        (encoder).writeInt(((Integer) data.get(208)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(209)));
+        (encoder).writeInt(((Integer) data.get(210)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(211)));
+        (encoder).writeInt(((Integer) data.get(212)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(213)));
+        (encoder).writeInt(((Integer) data.get(214)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(215)));
+        (encoder).writeInt(((Integer) data.get(216)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(217)));
+        (encoder).writeInt(((Integer) data.get(218)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(219)));
+        (encoder).writeInt(((Integer) data.get(220)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(221)));
+        (encoder).writeInt(((Integer) data.get(222)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(223)));
+        (encoder).writeInt(((Integer) data.get(224)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(225)));
+        (encoder).writeInt(((Integer) data.get(226)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(227)));
+        (encoder).writeInt(((Integer) data.get(228)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(229)));
+        (encoder).writeInt(((Integer) data.get(230)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(231)));
+        (encoder).writeInt(((Integer) data.get(232)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(233)));
+        (encoder).writeInt(((Integer) data.get(234)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(235)));
+        (encoder).writeInt(((Integer) data.get(236)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(237)));
+        (encoder).writeInt(((Integer) data.get(238)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(239)));
+        (encoder).writeInt(((Integer) data.get(240)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(241)));
+        (encoder).writeInt(((Integer) data.get(242)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(243)));
+        (encoder).writeInt(((Integer) data.get(244)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(245)));
+        (encoder).writeInt(((Integer) data.get(246)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(247)));
+        (encoder).writeInt(((Integer) data.get(248)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(249)));
+        (encoder).writeInt(((Integer) data.get(250)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(251)));
+        (encoder).writeInt(((Integer) data.get(252)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(253)));
+        (encoder).writeInt(((Integer) data.get(254)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(255)));
+        (encoder).writeInt(((Integer) data.get(256)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(257)));
+        (encoder).writeInt(((Integer) data.get(258)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(259)));
+        (encoder).writeInt(((Integer) data.get(260)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(261)));
+        (encoder).writeInt(((Integer) data.get(262)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(263)));
+        (encoder).writeInt(((Integer) data.get(264)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(265)));
+        (encoder).writeInt(((Integer) data.get(266)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(267)));
+        (encoder).writeInt(((Integer) data.get(268)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(269)));
+        (encoder).writeInt(((Integer) data.get(270)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(271)));
+        (encoder).writeInt(((Integer) data.get(272)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(273)));
+        (encoder).writeInt(((Integer) data.get(274)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(275)));
+        (encoder).writeInt(((Integer) data.get(276)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(277)));
+        (encoder).writeInt(((Integer) data.get(278)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(279)));
+        (encoder).writeInt(((Integer) data.get(280)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(281)));
+        (encoder).writeInt(((Integer) data.get(282)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(283)));
+        (encoder).writeInt(((Integer) data.get(284)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(285)));
+        (encoder).writeInt(((Integer) data.get(286)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(287)));
+        (encoder).writeInt(((Integer) data.get(288)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(289)));
+        (encoder).writeInt(((Integer) data.get(290)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(291)));
+        (encoder).writeInt(((Integer) data.get(292)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(293)));
+        (encoder).writeInt(((Integer) data.get(294)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(295)));
+        (encoder).writeInt(((Integer) data.get(296)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(297)));
+        (encoder).writeInt(((Integer) data.get(298)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(299)));
+        (encoder).writeInt(((Integer) data.get(300)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(301)));
+        (encoder).writeInt(((Integer) data.get(302)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(303)));
+        (encoder).writeInt(((Integer) data.get(304)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(305)));
+        (encoder).writeInt(((Integer) data.get(306)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(307)));
+        (encoder).writeInt(((Integer) data.get(308)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(309)));
+        (encoder).writeInt(((Integer) data.get(310)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(311)));
+        (encoder).writeInt(((Integer) data.get(312)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(313)));
+        (encoder).writeInt(((Integer) data.get(314)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(315)));
+        (encoder).writeInt(((Integer) data.get(316)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(317)));
+        (encoder).writeInt(((Integer) data.get(318)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(319)));
+        (encoder).writeInt(((Integer) data.get(320)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(321)));
+        (encoder).writeInt(((Integer) data.get(322)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(323)));
+        (encoder).writeInt(((Integer) data.get(324)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(325)));
+        (encoder).writeInt(((Integer) data.get(326)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(327)));
+        (encoder).writeInt(((Integer) data.get(328)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(329)));
+        (encoder).writeInt(((Integer) data.get(330)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(331)));
+        (encoder).writeInt(((Integer) data.get(332)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(333)));
+        (encoder).writeInt(((Integer) data.get(334)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(335)));
+        (encoder).writeInt(((Integer) data.get(336)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(337)));
+        (encoder).writeInt(((Integer) data.get(338)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(339)));
+        (encoder).writeInt(((Integer) data.get(340)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(341)));
+        (encoder).writeInt(((Integer) data.get(342)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(343)));
+        (encoder).writeInt(((Integer) data.get(344)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(345)));
+        (encoder).writeInt(((Integer) data.get(346)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(347)));
+        (encoder).writeInt(((Integer) data.get(348)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(349)));
+        (encoder).writeInt(((Integer) data.get(350)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(351)));
+        (encoder).writeInt(((Integer) data.get(352)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(353)));
+        (encoder).writeInt(((Integer) data.get(354)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(355)));
+        (encoder).writeInt(((Integer) data.get(356)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(357)));
+        (encoder).writeInt(((Integer) data.get(358)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(359)));
+        (encoder).writeInt(((Integer) data.get(360)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(361)));
+        (encoder).writeInt(((Integer) data.get(362)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(363)));
+        (encoder).writeInt(((Integer) data.get(364)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(365)));
+        (encoder).writeInt(((Integer) data.get(366)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(367)));
+        (encoder).writeInt(((Integer) data.get(368)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(369)));
+        (encoder).writeInt(((Integer) data.get(370)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(371)));
+        (encoder).writeInt(((Integer) data.get(372)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(373)));
+        (encoder).writeInt(((Integer) data.get(374)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(375)));
+        (encoder).writeInt(((Integer) data.get(376)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(377)));
+        (encoder).writeInt(((Integer) data.get(378)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(379)));
+        (encoder).writeInt(((Integer) data.get(380)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(381)));
+        (encoder).writeInt(((Integer) data.get(382)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(383)));
+        (encoder).writeInt(((Integer) data.get(384)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(385)));
+        (encoder).writeInt(((Integer) data.get(386)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(387)));
+        (encoder).writeInt(((Integer) data.get(388)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(389)));
+        (encoder).writeInt(((Integer) data.get(390)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(391)));
+        (encoder).writeInt(((Integer) data.get(392)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(393)));
+        (encoder).writeInt(((Integer) data.get(394)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(395)));
+        (encoder).writeInt(((Integer) data.get(396)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(397)));
+        (encoder).writeInt(((Integer) data.get(398)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(399)));
+        (encoder).writeInt(((Integer) data.get(400)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(401)));
+        (encoder).writeInt(((Integer) data.get(402)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(403)));
+        (encoder).writeInt(((Integer) data.get(404)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(405)));
+        (encoder).writeInt(((Integer) data.get(406)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(407)));
+        (encoder).writeInt(((Integer) data.get(408)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(409)));
+        (encoder).writeInt(((Integer) data.get(410)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(411)));
+        (encoder).writeInt(((Integer) data.get(412)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(413)));
+        (encoder).writeInt(((Integer) data.get(414)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(415)));
+        (encoder).writeInt(((Integer) data.get(416)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(417)));
+        (encoder).writeInt(((Integer) data.get(418)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(419)));
+        (encoder).writeInt(((Integer) data.get(420)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(421)));
+        (encoder).writeInt(((Integer) data.get(422)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(423)));
+        (encoder).writeInt(((Integer) data.get(424)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(425)));
+        (encoder).writeInt(((Integer) data.get(426)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(427)));
+        (encoder).writeInt(((Integer) data.get(428)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(429)));
+        (encoder).writeInt(((Integer) data.get(430)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(431)));
+        (encoder).writeInt(((Integer) data.get(432)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(433)));
+        (encoder).writeInt(((Integer) data.get(434)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(435)));
+        (encoder).writeInt(((Integer) data.get(436)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(437)));
+        (encoder).writeInt(((Integer) data.get(438)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(439)));
+        (encoder).writeInt(((Integer) data.get(440)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(441)));
+        (encoder).writeInt(((Integer) data.get(442)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(443)));
+        (encoder).writeInt(((Integer) data.get(444)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(445)));
+        (encoder).writeInt(((Integer) data.get(446)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(447)));
+        (encoder).writeInt(((Integer) data.get(448)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(449)));
+        (encoder).writeInt(((Integer) data.get(450)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(451)));
+        (encoder).writeInt(((Integer) data.get(452)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(453)));
+        (encoder).writeInt(((Integer) data.get(454)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(455)));
+        (encoder).writeInt(((Integer) data.get(456)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(457)));
+        (encoder).writeInt(((Integer) data.get(458)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(459)));
+        (encoder).writeInt(((Integer) data.get(460)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(461)));
+        (encoder).writeInt(((Integer) data.get(462)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(463)));
+        (encoder).writeInt(((Integer) data.get(464)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(465)));
+        (encoder).writeInt(((Integer) data.get(466)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(467)));
+        (encoder).writeInt(((Integer) data.get(468)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(469)));
+        (encoder).writeInt(((Integer) data.get(470)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(471)));
+        (encoder).writeInt(((Integer) data.get(472)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(473)));
+        (encoder).writeInt(((Integer) data.get(474)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(475)));
+        (encoder).writeInt(((Integer) data.get(476)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(477)));
+        (encoder).writeInt(((Integer) data.get(478)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(479)));
+        (encoder).writeInt(((Integer) data.get(480)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(481)));
+        (encoder).writeInt(((Integer) data.get(482)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(483)));
+        (encoder).writeInt(((Integer) data.get(484)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(485)));
+        (encoder).writeInt(((Integer) data.get(486)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(487)));
+        (encoder).writeInt(((Integer) data.get(488)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(489)));
+        (encoder).writeInt(((Integer) data.get(490)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(491)));
+        (encoder).writeInt(((Integer) data.get(492)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(493)));
+        (encoder).writeInt(((Integer) data.get(494)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(495)));
+        (encoder).writeInt(((Integer) data.get(496)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(497)));
+        (encoder).writeInt(((Integer) data.get(498)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(499)));
+        (encoder).writeInt(((Integer) data.get(500)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(501)));
+        (encoder).writeInt(((Integer) data.get(502)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(503)));
+        (encoder).writeInt(((Integer) data.get(504)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(505)));
+        (encoder).writeInt(((Integer) data.get(506)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(507)));
+        (encoder).writeInt(((Integer) data.get(508)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(509)));
+        (encoder).writeInt(((Integer) data.get(510)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(511)));
+        (encoder).writeInt(((Integer) data.get(512)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(513)));
+        (encoder).writeInt(((Integer) data.get(514)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(515)));
+        (encoder).writeInt(((Integer) data.get(516)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(517)));
+        (encoder).writeInt(((Integer) data.get(518)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(519)));
+        (encoder).writeInt(((Integer) data.get(520)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(521)));
+        (encoder).writeInt(((Integer) data.get(522)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(523)));
+        (encoder).writeInt(((Integer) data.get(524)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(525)));
+        (encoder).writeInt(((Integer) data.get(526)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(527)));
+        (encoder).writeInt(((Integer) data.get(528)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(529)));
+        (encoder).writeInt(((Integer) data.get(530)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(531)));
+        (encoder).writeInt(((Integer) data.get(532)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(533)));
+        (encoder).writeInt(((Integer) data.get(534)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(535)));
+        (encoder).writeInt(((Integer) data.get(536)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(537)));
+        (encoder).writeInt(((Integer) data.get(538)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(539)));
+        (encoder).writeInt(((Integer) data.get(540)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(541)));
+        (encoder).writeInt(((Integer) data.get(542)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(543)));
+        (encoder).writeInt(((Integer) data.get(544)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(545)));
+        (encoder).writeInt(((Integer) data.get(546)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(547)));
+        (encoder).writeInt(((Integer) data.get(548)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(549)));
+        (encoder).writeInt(((Integer) data.get(550)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(551)));
+        (encoder).writeInt(((Integer) data.get(552)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(553)));
+        (encoder).writeInt(((Integer) data.get(554)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(555)));
+        (encoder).writeInt(((Integer) data.get(556)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(557)));
+        (encoder).writeInt(((Integer) data.get(558)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(559)));
+        (encoder).writeInt(((Integer) data.get(560)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(561)));
+        (encoder).writeInt(((Integer) data.get(562)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(563)));
+        (encoder).writeInt(((Integer) data.get(564)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(565)));
+        (encoder).writeInt(((Integer) data.get(566)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(567)));
+        (encoder).writeInt(((Integer) data.get(568)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(569)));
+        (encoder).writeInt(((Integer) data.get(570)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(571)));
+        (encoder).writeInt(((Integer) data.get(572)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(573)));
+        (encoder).writeInt(((Integer) data.get(574)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(575)));
+        (encoder).writeInt(((Integer) data.get(576)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(577)));
+        (encoder).writeInt(((Integer) data.get(578)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(579)));
+        (encoder).writeInt(((Integer) data.get(580)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(581)));
+        (encoder).writeInt(((Integer) data.get(582)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(583)));
+        (encoder).writeInt(((Integer) data.get(584)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(585)));
+        (encoder).writeInt(((Integer) data.get(586)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(587)));
+        (encoder).writeInt(((Integer) data.get(588)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(589)));
+        (encoder).writeInt(((Integer) data.get(590)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(591)));
+        (encoder).writeInt(((Integer) data.get(592)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(593)));
+        (encoder).writeInt(((Integer) data.get(594)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(595)));
+        (encoder).writeInt(((Integer) data.get(596)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(597)));
+        (encoder).writeInt(((Integer) data.get(598)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(599)));
+        (encoder).writeInt(((Integer) data.get(600)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(601)));
+        (encoder).writeInt(((Integer) data.get(602)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(603)));
+        (encoder).writeInt(((Integer) data.get(604)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(605)));
+        (encoder).writeInt(((Integer) data.get(606)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(607)));
+        (encoder).writeInt(((Integer) data.get(608)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(609)));
+        (encoder).writeInt(((Integer) data.get(610)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(611)));
+        (encoder).writeInt(((Integer) data.get(612)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(613)));
+        (encoder).writeInt(((Integer) data.get(614)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(615)));
+        (encoder).writeInt(((Integer) data.get(616)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(617)));
+        (encoder).writeInt(((Integer) data.get(618)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(619)));
+        (encoder).writeInt(((Integer) data.get(620)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(621)));
+        (encoder).writeInt(((Integer) data.get(622)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(623)));
+        (encoder).writeInt(((Integer) data.get(624)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(625)));
+        (encoder).writeInt(((Integer) data.get(626)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(627)));
+        (encoder).writeInt(((Integer) data.get(628)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(629)));
+        (encoder).writeInt(((Integer) data.get(630)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(631)));
+        (encoder).writeInt(((Integer) data.get(632)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(633)));
+        (encoder).writeInt(((Integer) data.get(634)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(635)));
+        (encoder).writeInt(((Integer) data.get(636)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(637)));
+        (encoder).writeInt(((Integer) data.get(638)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(639)));
+        (encoder).writeInt(((Integer) data.get(640)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(641)));
+        (encoder).writeInt(((Integer) data.get(642)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(643)));
+        (encoder).writeInt(((Integer) data.get(644)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(645)));
+        (encoder).writeInt(((Integer) data.get(646)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(647)));
+        (encoder).writeInt(((Integer) data.get(648)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(649)));
+        (encoder).writeInt(((Integer) data.get(650)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(651)));
+        (encoder).writeInt(((Integer) data.get(652)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(653)));
+        (encoder).writeInt(((Integer) data.get(654)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(655)));
+        (encoder).writeInt(((Integer) data.get(656)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(657)));
+        (encoder).writeInt(((Integer) data.get(658)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(659)));
+        (encoder).writeInt(((Integer) data.get(660)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(661)));
+        (encoder).writeInt(((Integer) data.get(662)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(663)));
+        (encoder).writeInt(((Integer) data.get(664)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(665)));
+        (encoder).writeInt(((Integer) data.get(666)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(667)));
+        (encoder).writeInt(((Integer) data.get(668)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(669)));
+        (encoder).writeInt(((Integer) data.get(670)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(671)));
+        (encoder).writeInt(((Integer) data.get(672)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(673)));
+        (encoder).writeInt(((Integer) data.get(674)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(675)));
+        (encoder).writeInt(((Integer) data.get(676)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(677)));
+        (encoder).writeInt(((Integer) data.get(678)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(679)));
+        (encoder).writeInt(((Integer) data.get(680)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(681)));
+        (encoder).writeInt(((Integer) data.get(682)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(683)));
+        (encoder).writeInt(((Integer) data.get(684)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(685)));
+        (encoder).writeInt(((Integer) data.get(686)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(687)));
+        (encoder).writeInt(((Integer) data.get(688)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(689)));
+        (encoder).writeInt(((Integer) data.get(690)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(691)));
+        (encoder).writeInt(((Integer) data.get(692)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(693)));
+        (encoder).writeInt(((Integer) data.get(694)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(695)));
+        (encoder).writeInt(((Integer) data.get(696)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(697)));
+        (encoder).writeInt(((Integer) data.get(698)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(699)));
+        (encoder).writeInt(((Integer) data.get(700)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(701)));
+        (encoder).writeInt(((Integer) data.get(702)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(703)));
+        (encoder).writeInt(((Integer) data.get(704)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(705)));
+        (encoder).writeInt(((Integer) data.get(706)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(707)));
+        (encoder).writeInt(((Integer) data.get(708)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(709)));
+        (encoder).writeInt(((Integer) data.get(710)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(711)));
+        (encoder).writeInt(((Integer) data.get(712)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(713)));
+        (encoder).writeInt(((Integer) data.get(714)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(715)));
+        (encoder).writeInt(((Integer) data.get(716)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(717)));
+        (encoder).writeInt(((Integer) data.get(718)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(719)));
+        (encoder).writeInt(((Integer) data.get(720)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(721)));
+        (encoder).writeInt(((Integer) data.get(722)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(723)));
+        (encoder).writeInt(((Integer) data.get(724)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(725)));
+        (encoder).writeInt(((Integer) data.get(726)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(727)));
+        (encoder).writeInt(((Integer) data.get(728)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(729)));
+        (encoder).writeInt(((Integer) data.get(730)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(731)));
+        (encoder).writeInt(((Integer) data.get(732)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(733)));
+        (encoder).writeInt(((Integer) data.get(734)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(735)));
+        (encoder).writeInt(((Integer) data.get(736)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(737)));
+        (encoder).writeInt(((Integer) data.get(738)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(739)));
+        (encoder).writeInt(((Integer) data.get(740)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(741)));
+        (encoder).writeInt(((Integer) data.get(742)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(743)));
+        (encoder).writeInt(((Integer) data.get(744)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(745)));
+        (encoder).writeInt(((Integer) data.get(746)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(747)));
+        (encoder).writeInt(((Integer) data.get(748)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(749)));
+        (encoder).writeInt(((Integer) data.get(750)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(751)));
+        (encoder).writeInt(((Integer) data.get(752)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(753)));
+        (encoder).writeInt(((Integer) data.get(754)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(755)));
+        (encoder).writeInt(((Integer) data.get(756)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(757)));
+        (encoder).writeInt(((Integer) data.get(758)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(759)));
+        (encoder).writeInt(((Integer) data.get(760)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(761)));
+        (encoder).writeInt(((Integer) data.get(762)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(763)));
+        (encoder).writeInt(((Integer) data.get(764)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(765)));
+        (encoder).writeInt(((Integer) data.get(766)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(767)));
+        (encoder).writeInt(((Integer) data.get(768)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(769)));
+        (encoder).writeInt(((Integer) data.get(770)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(771)));
+        (encoder).writeInt(((Integer) data.get(772)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(773)));
+        (encoder).writeInt(((Integer) data.get(774)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(775)));
+        (encoder).writeInt(((Integer) data.get(776)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(777)));
+        (encoder).writeInt(((Integer) data.get(778)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(779)));
+        (encoder).writeInt(((Integer) data.get(780)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(781)));
+        (encoder).writeInt(((Integer) data.get(782)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(783)));
+        (encoder).writeInt(((Integer) data.get(784)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(785)));
+        (encoder).writeInt(((Integer) data.get(786)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(787)));
+        (encoder).writeInt(((Integer) data.get(788)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(789)));
+        (encoder).writeInt(((Integer) data.get(790)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(791)));
+        (encoder).writeInt(((Integer) data.get(792)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(793)));
+        (encoder).writeInt(((Integer) data.get(794)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(795)));
+        (encoder).writeInt(((Integer) data.get(796)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(797)));
+        (encoder).writeInt(((Integer) data.get(798)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(799)));
+        (encoder).writeInt(((Integer) data.get(800)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(801)));
+        (encoder).writeInt(((Integer) data.get(802)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(803)));
+        (encoder).writeInt(((Integer) data.get(804)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(805)));
+        (encoder).writeInt(((Integer) data.get(806)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(807)));
+        (encoder).writeInt(((Integer) data.get(808)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(809)));
+        (encoder).writeInt(((Integer) data.get(810)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(811)));
+        (encoder).writeInt(((Integer) data.get(812)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(813)));
+        (encoder).writeInt(((Integer) data.get(814)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(815)));
+        (encoder).writeInt(((Integer) data.get(816)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(817)));
+        (encoder).writeInt(((Integer) data.get(818)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(819)));
+        (encoder).writeInt(((Integer) data.get(820)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(821)));
+        (encoder).writeInt(((Integer) data.get(822)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(823)));
+        (encoder).writeInt(((Integer) data.get(824)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(825)));
+        (encoder).writeInt(((Integer) data.get(826)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(827)));
+        (encoder).writeInt(((Integer) data.get(828)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(829)));
+        (encoder).writeInt(((Integer) data.get(830)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(831)));
+        (encoder).writeInt(((Integer) data.get(832)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(833)));
+        (encoder).writeInt(((Integer) data.get(834)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(835)));
+        (encoder).writeInt(((Integer) data.get(836)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(837)));
+        (encoder).writeInt(((Integer) data.get(838)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(839)));
+        (encoder).writeInt(((Integer) data.get(840)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(841)));
+        (encoder).writeInt(((Integer) data.get(842)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(843)));
+        (encoder).writeInt(((Integer) data.get(844)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(845)));
+        (encoder).writeInt(((Integer) data.get(846)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(847)));
+        (encoder).writeInt(((Integer) data.get(848)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(849)));
+        (encoder).writeInt(((Integer) data.get(850)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(851)));
+        (encoder).writeInt(((Integer) data.get(852)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(853)));
+        (encoder).writeInt(((Integer) data.get(854)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(855)));
+        (encoder).writeInt(((Integer) data.get(856)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(857)));
+        (encoder).writeInt(((Integer) data.get(858)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(859)));
+        (encoder).writeInt(((Integer) data.get(860)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(861)));
+        (encoder).writeInt(((Integer) data.get(862)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(863)));
+        (encoder).writeInt(((Integer) data.get(864)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(865)));
+        (encoder).writeInt(((Integer) data.get(866)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(867)));
+        (encoder).writeInt(((Integer) data.get(868)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(869)));
+        (encoder).writeInt(((Integer) data.get(870)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(871)));
+        (encoder).writeInt(((Integer) data.get(872)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(873)));
+        (encoder).writeInt(((Integer) data.get(874)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(875)));
+        (encoder).writeInt(((Integer) data.get(876)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(877)));
+        (encoder).writeInt(((Integer) data.get(878)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(879)));
+        (encoder).writeInt(((Integer) data.get(880)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(881)));
+        (encoder).writeInt(((Integer) data.get(882)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(883)));
+        (encoder).writeInt(((Integer) data.get(884)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(885)));
+        (encoder).writeInt(((Integer) data.get(886)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(887)));
+        (encoder).writeInt(((Integer) data.get(888)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(889)));
+        (encoder).writeInt(((Integer) data.get(890)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(891)));
+        (encoder).writeInt(((Integer) data.get(892)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(893)));
+        (encoder).writeInt(((Integer) data.get(894)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(895)));
+        (encoder).writeInt(((Integer) data.get(896)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(897)));
+        (encoder).writeInt(((Integer) data.get(898)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(899)));
+        (encoder).writeInt(((Integer) data.get(900)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(901)));
+        (encoder).writeInt(((Integer) data.get(902)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(903)));
+        (encoder).writeInt(((Integer) data.get(904)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(905)));
+        (encoder).writeInt(((Integer) data.get(906)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(907)));
+        (encoder).writeInt(((Integer) data.get(908)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(909)));
+        (encoder).writeInt(((Integer) data.get(910)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(911)));
+        (encoder).writeInt(((Integer) data.get(912)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(913)));
+        (encoder).writeInt(((Integer) data.get(914)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(915)));
+        (encoder).writeInt(((Integer) data.get(916)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(917)));
+        (encoder).writeInt(((Integer) data.get(918)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(919)));
+        (encoder).writeInt(((Integer) data.get(920)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(921)));
+        (encoder).writeInt(((Integer) data.get(922)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(923)));
+        (encoder).writeInt(((Integer) data.get(924)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(925)));
+        (encoder).writeInt(((Integer) data.get(926)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(927)));
+        (encoder).writeInt(((Integer) data.get(928)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(929)));
+        (encoder).writeInt(((Integer) data.get(930)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(931)));
+        (encoder).writeInt(((Integer) data.get(932)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(933)));
+        (encoder).writeInt(((Integer) data.get(934)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(935)));
+        (encoder).writeInt(((Integer) data.get(936)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(937)));
+        (encoder).writeInt(((Integer) data.get(938)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(939)));
+        (encoder).writeInt(((Integer) data.get(940)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(941)));
+        (encoder).writeInt(((Integer) data.get(942)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(943)));
+        (encoder).writeInt(((Integer) data.get(944)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(945)));
+        (encoder).writeInt(((Integer) data.get(946)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(947)));
+        (encoder).writeInt(((Integer) data.get(948)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(949)));
+        (encoder).writeInt(((Integer) data.get(950)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(951)));
+        (encoder).writeInt(((Integer) data.get(952)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(953)));
+        (encoder).writeInt(((Integer) data.get(954)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(955)));
+        (encoder).writeInt(((Integer) data.get(956)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(957)));
+        (encoder).writeInt(((Integer) data.get(958)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(959)));
+        (encoder).writeInt(((Integer) data.get(960)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(961)));
+        (encoder).writeInt(((Integer) data.get(962)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(963)));
+        (encoder).writeInt(((Integer) data.get(964)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(965)));
+        (encoder).writeInt(((Integer) data.get(966)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(967)));
+        (encoder).writeInt(((Integer) data.get(968)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(969)));
+        (encoder).writeInt(((Integer) data.get(970)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(971)));
+        (encoder).writeInt(((Integer) data.get(972)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(973)));
+        (encoder).writeInt(((Integer) data.get(974)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(975)));
+        (encoder).writeInt(((Integer) data.get(976)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(977)));
+        (encoder).writeInt(((Integer) data.get(978)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(979)));
+        (encoder).writeInt(((Integer) data.get(980)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(981)));
+        (encoder).writeInt(((Integer) data.get(982)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(983)));
+        (encoder).writeInt(((Integer) data.get(984)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(985)));
+        (encoder).writeInt(((Integer) data.get(986)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(987)));
+        (encoder).writeInt(((Integer) data.get(988)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(989)));
+        (encoder).writeInt(((Integer) data.get(990)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(991)));
+        (encoder).writeInt(((Integer) data.get(992)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(993)));
+        (encoder).writeInt(((Integer) data.get(994)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(995)));
+        (encoder).writeInt(((Integer) data.get(996)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(997)));
+        (encoder).writeInt(((Integer) data.get(998)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(999)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
new file mode 100644
index 000000000..ebac3acf6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
@@ -0,0 +1,116 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericEnumSymbol testEnumUnion0 = ((GenericEnumSymbol) data.get(1));
+        if (testEnumUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testEnumUnion0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) testEnumUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                int valueToWrite1;
+                Object enumValue1 = testEnumUnion0;
+                if (enumValue1 instanceof Enum) {
+                    valueToWrite1 = ((Enum) enumValue1).ordinal();
+                } else {
+                    valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                }
+                (encoder).writeEnum(valueToWrite1);
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray0 = ((List<GenericEnumSymbol> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testEnumArray0 == null)||testEnumArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumArray0 .size());
+            for (int counter0 = 0; (counter0 <testEnumArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                int valueToWrite2;
+                Object enumValue2 = testEnumArray0 .get(counter0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray0 = ((List<GenericEnumSymbol> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testEnumUnionArray0 == null)||testEnumUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testEnumUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericEnumSymbol union0 = null;
+                union0 = ((List<GenericEnumSymbol> ) testEnumUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        int valueToWrite3;
+                        Object enumValue3 = union0;
+                        if (enumValue3 instanceof Enum) {
+                            valueToWrite3 = ((Enum) enumValue3).ordinal();
+                        } else {
+                            valueToWrite3 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite3);
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
new file mode 100644
index 000000000..3916cd1b8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
@@ -0,0 +1,88 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericFixed testFixedUnion0 = ((GenericFixed) data.get(1));
+        if (testFixedUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testFixedUnion0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) testFixedUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                (encoder).writeFixed(((GenericFixed) testFixedUnion0).bytes());
+            }
+        }
+        List<GenericFixed> testFixedArray0 = ((List<GenericFixed> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testFixedArray0 == null)||testFixedArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedArray0 .size());
+            for (int counter0 = 0; (counter0 <testFixedArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeFixed(((GenericFixed) testFixedArray0 .get(counter0)).bytes());
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = ((List<GenericFixed> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testFixedUnionArray0 == null)||testFixedUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testFixedUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericFixed union0 = null;
+                union0 = ((List<GenericFixed> ) testFixedUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeFixed(((GenericFixed) union0).bytes());
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
new file mode 100644
index 000000000..2d086c655
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
@@ -0,0 +1,70 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union0 = ((Object) data.get(0));
+        if (union0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+            } else {
+                if (union0 instanceof CharSequence) {
+                    (encoder).writeIndex(2);
+                    if (((CharSequence) union0) instanceof Utf8) {
+                        (encoder).writeString(((Utf8)((CharSequence) union0)));
+                    } else {
+                        (encoder).writeString(((CharSequence) union0).toString());
+                    }
+                } else {
+                    if (union0 instanceof Integer) {
+                        (encoder).writeIndex(3);
+                        (encoder).writeInt(((Integer) union0));
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
new file mode 100644
index 000000000..fab69e2dd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
@@ -0,0 +1,157 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Integer testIntUnion0 = ((Integer) data.get(1));
+        if (testIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeInt(((Integer) testIntUnion0));
+        }
+        Integer testFlippedIntUnion0 = ((Integer) data.get(2));
+        if (testFlippedIntUnion0 == null) {
+            (encoder).writeIndex(1);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(0);
+            (encoder).writeInt(((Integer) testFlippedIntUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        CharSequence testStringUnion0 = ((CharSequence) data.get(4));
+        if (testStringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testStringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testStringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) testStringUnion0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(5)));
+        Long testLongUnion0 = ((Long) data.get(6));
+        if (testLongUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) testLongUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeDouble(((Double) data.get(7)));
+        Double testDoubleUnion0 = ((Double) data.get(8));
+        if (testDoubleUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeDouble(((Double) testDoubleUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFloat(((Float) data.get(9)));
+        Float testFloatUnion0 = ((Float) data.get(10));
+        if (testFloatUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeFloat(((Float) testFloatUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBoolean(((Boolean) data.get(11)));
+        Boolean testBooleanUnion0 = ((Boolean) data.get(12));
+        if (testBooleanUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBoolean(((Boolean) testBooleanUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBytes(((ByteBuffer) data.get(13)));
+        ByteBuffer testBytesUnion0 = ((ByteBuffer) data.get(14));
+        if (testBytesUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBytes(((ByteBuffer) testBytesUnion0));
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
new file mode 100644
index 000000000..d5671a10a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union_field0 = ((Object) data.get(0));
+        if (union_field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record1".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeRecord10(((IndexedRecord) union_field0), (encoder), (customization));
+            } else {
+                if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                    (encoder).writeIndex(2);
+                    serializeRecord20(((IndexedRecord) union_field0), (encoder), (customization));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
new file mode 100644
index 000000000..73052d08b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> recordsArray0 = ((List<IndexedRecord> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArray0 == null)||recordsArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArray0 .size());
+            for (int counter0 = 0; (counter0 <recordsArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord subRecord0 = null;
+                subRecord0 = ((List<IndexedRecord> ) recordsArray0).get(counter0);
+                serializeSubRecord0(subRecord0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMap0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMap0 == null)||recordsMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) recordsMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord subRecord1 = null;
+                subRecord1 = ((Map<CharSequence, IndexedRecord> ) recordsMap0).get(key0);
+                serializeSubRecord0(subRecord1, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+        List<IndexedRecord> recordsArrayUnion0 = ((List<IndexedRecord> ) data.get(2));
+        if (recordsArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<IndexedRecord> ) recordsArrayUnion0) == null)||((List<IndexedRecord> ) recordsArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<IndexedRecord> ) recordsArrayUnion0).size());
+                    for (int counter1 = 0; (counter1 <((List<IndexedRecord> ) recordsArrayUnion0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union0 = null;
+                        union0 = ((List<IndexedRecord> )((List<IndexedRecord> ) recordsArrayUnion0)).get(counter1);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMapUnion0 = ((Map<CharSequence, IndexedRecord> ) data.get(3));
+        if (recordsMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, IndexedRecord> ) recordsMapUnion0) == null)||((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).size());
+                    for (CharSequence key1 : ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key1);
+                        IndexedRecord union1 = null;
+                        union1 = ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).get(key1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
new file mode 100644
index 000000000..75bdca045
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
@@ -0,0 +1,230 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMap0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArrayMap0 == null)||recordsArrayMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArrayMap0 .size());
+            for (int counter0 = 0; (counter0 <recordsArrayMap0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Map<CharSequence, IndexedRecord> map0 = null;
+                map0 = ((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMap0).get(counter0);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(map0);
+                }
+                (encoder).writeMapStart();
+                if ((map0 == null)||map0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(map0 .size());
+                    for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) map0).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        IndexedRecord union0 = null;
+                        union0 = ((Map<CharSequence, IndexedRecord> ) map0).get(key0);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMapArray0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMapArray0 == null)||recordsMapArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMapArray0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                List<IndexedRecord> array0 = null;
+                array0 = ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).get(key1);
+                (encoder).writeArrayStart();
+                if ((array0 == null)||array0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(array0 .size());
+                    for (int counter1 = 0; (counter1 <array0 .size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union1 = null;
+                        union1 = ((List<IndexedRecord> ) array0).get(counter1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        (encoder).writeMapEnd();
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMapUnion0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(2));
+        if (recordsArrayMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayMapUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0) == null)||((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size());
+                    for (int counter2 = 0; (counter2 <((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size()); counter2 ++) {
+                        (encoder).startItem();
+                        Map<CharSequence, IndexedRecord> map1 = null;
+                        map1 = ((List<Map<CharSequence, IndexedRecord>> )((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0)).get(counter2);
+                        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                            (customization).getCheckMapTypeFunction().apply(map1);
+                        }
+                        (encoder).writeMapStart();
+                        if ((map1 == null)||map1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(map1 .size());
+                            for (CharSequence key2 : ((Map<CharSequence, IndexedRecord> ) map1).keySet()) {
+                                (encoder).startItem();
+                                (encoder).writeString(key2);
+                                IndexedRecord union2 = null;
+                                union2 = ((Map<CharSequence, IndexedRecord> ) map1).get(key2);
+                                if (union2 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union2 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union2).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union2), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeMapEnd();
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArrayUnion0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(3));
+        if (recordsMapArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapArrayUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0) == null)||((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).size());
+                    for (CharSequence key3 : ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key3);
+                        List<IndexedRecord> array1 = null;
+                        array1 = ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).get(key3);
+                        (encoder).writeArrayStart();
+                        if ((array1 == null)||array1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(array1 .size());
+                            for (int counter3 = 0; (counter3 <array1 .size()); counter3 ++) {
+                                (encoder).startItem();
+                                IndexedRecord union3 = null;
+                                union3 = ((List<IndexedRecord> ) array1).get(counter3);
+                                if (union3 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union3 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union3).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union3), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeArrayEnd();
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
new file mode 100644
index 000000000..77ec06d6e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record0 = ((IndexedRecord) data.get(0));
+        if (record0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((record0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) record0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) record0), (encoder), (customization));
+            }
+        }
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record10 = ((IndexedRecord) data.get(1));
+        serializeSubRecord0(record10, (encoder), (customization));
+        CharSequence field0 = ((CharSequence) data.get(2));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastSerdeEnums_GenericSerializer_957378572.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastSerdeEnums_GenericSerializer_957378572.java
new file mode 100644
index 000000000..b6af90acf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastSerdeEnums_GenericSerializer_957378572.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeEnums_GenericSerializer_957378572
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> arrayOfEnums0 = ((List<GenericEnumSymbol> ) data.get(1));
+        if (arrayOfEnums0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfEnums0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericEnumSymbol> ) arrayOfEnums0) == null)||((List<GenericEnumSymbol> ) arrayOfEnums0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericEnumSymbol> ) arrayOfEnums0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericEnumSymbol> ) arrayOfEnums0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        int valueToWrite1;
+                        Object enumValue1 = ((List<GenericEnumSymbol> ) arrayOfEnums0).get(counter0);
+                        if (enumValue1 instanceof Enum) {
+                            valueToWrite1 = ((Enum) enumValue1).ordinal();
+                        } else {
+                            valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite1);
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericEnumSymbol> mapOfEnums0 = ((Map<CharSequence, GenericEnumSymbol> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfEnums0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfEnums0 == null)||mapOfEnums0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfEnums0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericEnumSymbol> ) mapOfEnums0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                int valueToWrite2;
+                Object enumValue2 = mapOfEnums0 .get(key0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastSerdeFixed_GenericSerializer_504108934.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastSerdeFixed_GenericSerializer_504108934.java
new file mode 100644
index 000000000..dc2c78c0a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastSerdeFixed_GenericSerializer_504108934.java
@@ -0,0 +1,74 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeFixed_GenericSerializer_504108934
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> arrayOfFixed0 = ((List<GenericFixed> ) data.get(1));
+        if (arrayOfFixed0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfFixed0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericFixed> ) arrayOfFixed0) == null)||((List<GenericFixed> ) arrayOfFixed0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericFixed> ) arrayOfFixed0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericFixed> ) arrayOfFixed0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFixed(((GenericFixed)((List<GenericFixed> ) arrayOfFixed0).get(counter0)).bytes());
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericFixed> mapOfFixed0 = ((Map<CharSequence, GenericFixed> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfFixed0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfFixed0 == null)||mapOfFixed0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfFixed0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericFixed> ) mapOfFixed0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                (encoder).writeFixed(((GenericFixed) mapOfFixed0 .get(key0)).bytes());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
new file mode 100644
index 000000000..cb1e95fae
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
new file mode 100644
index 000000000..c79fa9ffc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Map_of_UNION_GenericSerializer_2140000109.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Map_of_UNION_GenericSerializer_2140000109.java
new file mode 100644
index 000000000..993dc0561
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Map_of_UNION_GenericSerializer_2140000109.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericSerializer_2140000109
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord union0 = null;
+                union0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Map_of_record_GenericSerializer_1677529043.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Map_of_record_GenericSerializer_1677529043.java
new file mode 100644
index 000000000..0518596bf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/Map_of_record_GenericSerializer_1677529043.java
@@ -0,0 +1,57 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericSerializer_1677529043
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord record0 = null;
+                record0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/StringableRecord_SpecificSerializer_842267318.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/StringableRecord_SpecificSerializer_842267318.java
new file mode 100644
index 000000000..8a1a29640
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/StringableRecord_SpecificSerializer_842267318.java
@@ -0,0 +1,159 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.URI;
+import java.net.URL;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableSubRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificSerializer_842267318
+    implements FastSerializer<StringableRecord>
+{
+
+
+    public void serialize(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeStringableRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigInteger) data.get(0)).toString());
+        serialize_StringableRecord0(data, (encoder), (customization));
+        serialize_StringableRecord1(data, (encoder), (customization));
+        serialize_StringableRecord2(data, (encoder), (customization));
+        serialize_StringableRecord3(data, (encoder), (customization));
+        serialize_StringableRecord4(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigDecimal) data.get(1)).toString());
+        (encoder).writeString(((URI) data.get(2)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord1(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URL) data.get(3)).toString());
+        (encoder).writeString(((File) data.get(4)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord2(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<URL> urlArray0 = ((List<URL> ) data.get(5));
+        (encoder).writeArrayStart();
+        if ((urlArray0 == null)||urlArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlArray0 .size());
+            for (int counter0 = 0; (counter0 <urlArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeString(urlArray0 .get(counter0).toString());
+            }
+        }
+        (encoder).writeArrayEnd();
+        Map<URL, BigInteger> urlMap0 = ((Map<URL, BigInteger> ) data.get(6));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(urlMap0);
+        }
+        (encoder).writeMapStart();
+        if ((urlMap0 == null)||urlMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlMap0 .size());
+            for (URL key0 : ((Map<URL, BigInteger> ) urlMap0).keySet()) {
+                (encoder).startItem();
+                String keyString0 = key0 .toString();
+                (encoder).writeString(keyString0);
+                (encoder).writeString(((BigInteger) urlMap0 .get(key0)).toString());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord3(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord0 = ((StringableSubRecord) data.get(7));
+        serializeStringableSubRecord0(subRecord0, (encoder), (customization));
+        AnotherSubRecord subRecordWithSubRecord0 = ((AnotherSubRecord) data.get(8));
+        serializeAnotherSubRecord0(subRecordWithSubRecord0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URI) data.get(0)).toString());
+        serialize_StringableSubRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object nullStringIntUnion0 = ((Object) data.get(1));
+        if (nullStringIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullStringIntUnion0 instanceof CharSequence) {
+                (encoder).writeIndex(1);
+                if (((CharSequence) nullStringIntUnion0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) nullStringIntUnion0)));
+                } else {
+                    (encoder).writeString(((CharSequence) nullStringIntUnion0).toString());
+                }
+            } else {
+                if (nullStringIntUnion0 instanceof Integer) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeInt(((Integer) nullStringIntUnion0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord1 = ((StringableSubRecord) data.get(0));
+        serializeStringableSubRecord0(subRecord1, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord4(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        String stringUnion0 = ((String) data.get(9));
+        if (stringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeString(((String) stringUnion0).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/TestArrayOfFloats_GenericSerializer_1408566797.java b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/TestArrayOfFloats_GenericSerializer_1408566797.java
new file mode 100644
index 000000000..fc107dc42
--- /dev/null
+++ b/fastserde/avro-fastserde-tests18/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_8/TestArrayOfFloats_GenericSerializer_1408566797.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_8;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class TestArrayOfFloats_GenericSerializer_1408566797
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeTestArrayOfFloats0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Float> array_of_float0 = ((List<Float> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((array_of_float0 == null)||array_of_float0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(array_of_float0 .size());
+            Object array0 = array_of_float0;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <array_of_float0 .size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(array_of_float0 .get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
new file mode 100644
index 000000000..8e4598fec
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_BOOLEAN_GenericDeserializer_869749973_869749973.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_BOOLEAN_GenericDeserializer_869749973_869749973
+    implements FastDeserializer<List<Boolean>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_BOOLEAN_GenericDeserializer_869749973_869749973(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Boolean> deserialize(List<Boolean> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveBooleanList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveBooleanList) {
+            array0 = ((PrimitiveBooleanList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveBooleanArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
new file mode 100644
index 000000000..a7af3f78d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_DOUBLE_GenericDeserializer_18760307_18760307.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_DOUBLE_GenericDeserializer_18760307_18760307
+    implements FastDeserializer<List<Double>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_DOUBLE_GenericDeserializer_18760307_18760307(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Double> deserialize(List<Double> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveDoubleList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveDoubleList) {
+            array0 = ((PrimitiveDoubleList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveDoubleArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
new file mode 100644
index 000000000..456a30ae2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_FLOAT_GenericDeserializer_1012670397_1012670397.java
@@ -0,0 +1,31 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_FLOAT_GenericDeserializer_1012670397_1012670397
+    implements FastDeserializer<List<Float>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_FLOAT_GenericDeserializer_1012670397_1012670397(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Float> deserialize(List<Float> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveFloatList array0 = null;
+        array0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray((reuse), (decoder)));
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_INT_GenericDeserializer_1012089072_1012089072.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
new file mode 100644
index 000000000..f0c5b64fe
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_INT_GenericDeserializer_1012089072_1012089072.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_INT_GenericDeserializer_1012089072_1012089072
+    implements FastDeserializer<List<Integer>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_INT_GenericDeserializer_1012089072_1012089072(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Integer> deserialize(List<Integer> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveIntList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveIntList) {
+            array0 = ((PrimitiveIntList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_LONG_GenericDeserializer_325099267_325099267.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_LONG_GenericDeserializer_325099267_325099267.java
new file mode 100644
index 000000000..940edd412
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_LONG_GenericDeserializer_325099267_325099267.java
@@ -0,0 +1,43 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_LONG_GenericDeserializer_325099267_325099267
+    implements FastDeserializer<List<Long>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_LONG_GenericDeserializer_325099267_325099267(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<Long> deserialize(List<Long> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        PrimitiveLongList array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof PrimitiveLongList) {
+            array0 = ((PrimitiveLongList)(reuse));
+            array0 .clear();
+        } else {
+            array0 = new PrimitiveLongArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                array0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
new file mode 100644
index 000000000..7c2309189
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243.java
@@ -0,0 +1,1106 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_TestRecord_SpecificDeserializer_1088113243_1088113243(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_UNION_GenericDeserializer_777827233_777827233.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_UNION_GenericDeserializer_777827233_777827233.java
new file mode 100644
index 000000000..0e10537aa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_UNION_GenericDeserializer_777827233_777827233.java
@@ -0,0 +1,98 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericDeserializer_777827233_777827233
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema arrayElemOptionSchema0;
+    private final Schema field0;
+
+    public Array_of_UNION_GenericDeserializer_777827233_777827233(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.arrayElemOptionSchema0 = arrayArrayElemSchema0 .getTypes().get(1);
+        this.field0 = arrayElemOptionSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayElemOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayElemOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
new file mode 100644
index 000000000..7247a5759
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_UNION_SpecificDeserializer_1277939469_1277939469.java
@@ -0,0 +1,1116 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_SpecificDeserializer_1277939469_1277939469
+    implements FastDeserializer<List<com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Array_of_UNION_SpecificDeserializer_1277939469_1277939469(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public List<com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(List<com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.TestRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    decoder.readNull();
+                    array0 .add(null);
+                } else {
+                    if (unionIndex0 == 1) {
+                        array0 .add(deserializeTestRecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_record_GenericDeserializer_1606337179_2018567528.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_record_GenericDeserializer_1606337179_2018567528.java
new file mode 100644
index 000000000..6f6999c94
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_record_GenericDeserializer_1606337179_2018567528.java
@@ -0,0 +1,76 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class Array_of_record_GenericDeserializer_1606337179_2018567528
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionArrayElemSchema0;
+
+    public Array_of_record_GenericDeserializer_1606337179_2018567528(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionArrayElemSchema0 = readerSchema.getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                List<IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                if ((reuse) instanceof List) {
+                    unionOption0 = ((List)(reuse));
+                    if (unionOption0 instanceof GenericArray) {
+                        ((GenericArray) unionOption0).reset();
+                    } else {
+                        unionOption0 .clear();
+                    }
+                } else {
+                    unionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object unionOptionArrayElementReuseVar0 = null;
+                        if ((reuse) instanceof GenericArray) {
+                            unionOptionArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                        }
+                        unionOption0 .add(deserializerecord0(unionOptionArrayElementReuseVar0, (decoder), (customization)));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_record_GenericDeserializer_477614132_477614132.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_record_GenericDeserializer_477614132_477614132.java
new file mode 100644
index 000000000..73935419f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Array_of_record_GenericDeserializer_477614132_477614132.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericDeserializer_477614132_477614132
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArrayElemSchema0;
+    private final Schema field0;
+
+    public Array_of_record_GenericDeserializer_477614132_477614132(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArrayElemSchema0 = readerSchema.getElementType();
+        this.field0 = arrayArrayElemSchema0 .getField("field").schema();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), readerSchema);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
new file mode 100644
index 000000000..2e115c704
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732.java
@@ -0,0 +1,23040 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema f00;
+    private final Schema f10;
+    private final Schema f20;
+    private final Schema f30;
+    private final Schema f40;
+    private final Schema f50;
+    private final Schema f60;
+    private final Schema f70;
+    private final Schema f80;
+    private final Schema f90;
+    private final Schema f100;
+    private final Schema f110;
+    private final Schema f120;
+    private final Schema f130;
+    private final Schema f140;
+    private final Schema f150;
+    private final Schema f160;
+    private final Schema f170;
+    private final Schema f180;
+    private final Schema f190;
+    private final Schema f200;
+    private final Schema f210;
+    private final Schema f220;
+    private final Schema f230;
+    private final Schema f240;
+    private final Schema f250;
+    private final Schema f260;
+    private final Schema f270;
+    private final Schema f280;
+    private final Schema f290;
+    private final Schema f300;
+    private final Schema f310;
+    private final Schema f320;
+    private final Schema f330;
+    private final Schema f340;
+    private final Schema f350;
+    private final Schema f360;
+    private final Schema f370;
+    private final Schema f380;
+    private final Schema f390;
+    private final Schema f400;
+    private final Schema f410;
+    private final Schema f420;
+    private final Schema f430;
+    private final Schema f440;
+    private final Schema f450;
+    private final Schema f460;
+    private final Schema f470;
+    private final Schema f480;
+    private final Schema f490;
+    private final Schema f500;
+    private final Schema f510;
+    private final Schema f520;
+    private final Schema f530;
+    private final Schema f540;
+    private final Schema f550;
+    private final Schema f560;
+    private final Schema f570;
+    private final Schema f580;
+    private final Schema f590;
+    private final Schema f600;
+    private final Schema f610;
+    private final Schema f620;
+    private final Schema f630;
+    private final Schema f640;
+    private final Schema f650;
+    private final Schema f660;
+    private final Schema f670;
+    private final Schema f680;
+    private final Schema f690;
+    private final Schema f700;
+    private final Schema f710;
+    private final Schema f720;
+    private final Schema f730;
+    private final Schema f740;
+    private final Schema f750;
+    private final Schema f760;
+    private final Schema f770;
+    private final Schema f780;
+    private final Schema f790;
+    private final Schema f800;
+    private final Schema f810;
+    private final Schema f820;
+    private final Schema f830;
+    private final Schema f840;
+    private final Schema f850;
+    private final Schema f860;
+    private final Schema f870;
+    private final Schema f880;
+    private final Schema f890;
+    private final Schema f900;
+    private final Schema f910;
+    private final Schema f920;
+    private final Schema f930;
+    private final Schema f940;
+    private final Schema f950;
+    private final Schema f960;
+    private final Schema f970;
+    private final Schema f980;
+    private final Schema f990;
+    private final Schema f1000;
+    private final Schema f1010;
+    private final Schema f1020;
+    private final Schema f1030;
+    private final Schema f1040;
+    private final Schema f1050;
+    private final Schema f1060;
+    private final Schema f1070;
+    private final Schema f1080;
+    private final Schema f1090;
+    private final Schema f1100;
+    private final Schema f1110;
+    private final Schema f1120;
+    private final Schema f1130;
+    private final Schema f1140;
+    private final Schema f1150;
+    private final Schema f1160;
+    private final Schema f1170;
+    private final Schema f1180;
+    private final Schema f1190;
+    private final Schema f1200;
+    private final Schema f1210;
+    private final Schema f1220;
+    private final Schema f1230;
+    private final Schema f1240;
+    private final Schema f1250;
+    private final Schema f1260;
+    private final Schema f1270;
+    private final Schema f1280;
+    private final Schema f1290;
+    private final Schema f1300;
+    private final Schema f1310;
+    private final Schema f1320;
+    private final Schema f1330;
+    private final Schema f1340;
+    private final Schema f1350;
+    private final Schema f1360;
+    private final Schema f1370;
+    private final Schema f1380;
+    private final Schema f1390;
+    private final Schema f1400;
+    private final Schema f1410;
+    private final Schema f1420;
+    private final Schema f1430;
+    private final Schema f1440;
+    private final Schema f1450;
+    private final Schema f1460;
+    private final Schema f1470;
+    private final Schema f1480;
+    private final Schema f1490;
+    private final Schema f1500;
+    private final Schema f1510;
+    private final Schema f1520;
+    private final Schema f1530;
+    private final Schema f1540;
+    private final Schema f1550;
+    private final Schema f1560;
+    private final Schema f1570;
+    private final Schema f1580;
+    private final Schema f1590;
+    private final Schema f1600;
+    private final Schema f1610;
+    private final Schema f1620;
+    private final Schema f1630;
+    private final Schema f1640;
+    private final Schema f1650;
+    private final Schema f1660;
+    private final Schema f1670;
+    private final Schema f1680;
+    private final Schema f1690;
+    private final Schema f1700;
+    private final Schema f1710;
+    private final Schema f1720;
+    private final Schema f1730;
+    private final Schema f1740;
+    private final Schema f1750;
+    private final Schema f1760;
+    private final Schema f1770;
+    private final Schema f1780;
+    private final Schema f1790;
+    private final Schema f1800;
+    private final Schema f1810;
+    private final Schema f1820;
+    private final Schema f1830;
+    private final Schema f1840;
+    private final Schema f1850;
+    private final Schema f1860;
+    private final Schema f1870;
+    private final Schema f1880;
+    private final Schema f1890;
+    private final Schema f1900;
+    private final Schema f1910;
+    private final Schema f1920;
+    private final Schema f1930;
+    private final Schema f1940;
+    private final Schema f1950;
+    private final Schema f1960;
+    private final Schema f1970;
+    private final Schema f1980;
+    private final Schema f1990;
+    private final Schema f2000;
+    private final Schema f2010;
+    private final Schema f2020;
+    private final Schema f2030;
+    private final Schema f2040;
+    private final Schema f2050;
+    private final Schema f2060;
+    private final Schema f2070;
+    private final Schema f2080;
+    private final Schema f2090;
+    private final Schema f2100;
+    private final Schema f2110;
+    private final Schema f2120;
+    private final Schema f2130;
+    private final Schema f2140;
+    private final Schema f2150;
+    private final Schema f2160;
+    private final Schema f2170;
+    private final Schema f2180;
+    private final Schema f2190;
+    private final Schema f2200;
+    private final Schema f2210;
+    private final Schema f2220;
+    private final Schema f2230;
+    private final Schema f2240;
+    private final Schema f2250;
+    private final Schema f2260;
+    private final Schema f2270;
+    private final Schema f2280;
+    private final Schema f2290;
+    private final Schema f2300;
+    private final Schema f2310;
+    private final Schema f2320;
+    private final Schema f2330;
+    private final Schema f2340;
+    private final Schema f2350;
+    private final Schema f2360;
+    private final Schema f2370;
+    private final Schema f2380;
+    private final Schema f2390;
+    private final Schema f2400;
+    private final Schema f2410;
+    private final Schema f2420;
+    private final Schema f2430;
+    private final Schema f2440;
+    private final Schema f2450;
+    private final Schema f2460;
+    private final Schema f2470;
+    private final Schema f2480;
+    private final Schema f2490;
+    private final Schema f2500;
+    private final Schema f2510;
+    private final Schema f2520;
+    private final Schema f2530;
+    private final Schema f2540;
+    private final Schema f2550;
+    private final Schema f2560;
+    private final Schema f2570;
+    private final Schema f2580;
+    private final Schema f2590;
+    private final Schema f2600;
+    private final Schema f2610;
+    private final Schema f2620;
+    private final Schema f2630;
+    private final Schema f2640;
+    private final Schema f2650;
+    private final Schema f2660;
+    private final Schema f2670;
+    private final Schema f2680;
+    private final Schema f2690;
+    private final Schema f2700;
+    private final Schema f2710;
+    private final Schema f2720;
+    private final Schema f2730;
+    private final Schema f2740;
+    private final Schema f2750;
+    private final Schema f2760;
+    private final Schema f2770;
+    private final Schema f2780;
+    private final Schema f2790;
+    private final Schema f2800;
+    private final Schema f2810;
+    private final Schema f2820;
+    private final Schema f2830;
+    private final Schema f2840;
+    private final Schema f2850;
+    private final Schema f2860;
+    private final Schema f2870;
+    private final Schema f2880;
+    private final Schema f2890;
+    private final Schema f2900;
+    private final Schema f2910;
+    private final Schema f2920;
+    private final Schema f2930;
+    private final Schema f2940;
+    private final Schema f2950;
+    private final Schema f2960;
+    private final Schema f2970;
+    private final Schema f2980;
+    private final Schema f2990;
+    private final Schema f3000;
+    private final Schema f3010;
+    private final Schema f3020;
+    private final Schema f3030;
+    private final Schema f3040;
+    private final Schema f3050;
+    private final Schema f3060;
+    private final Schema f3070;
+    private final Schema f3080;
+    private final Schema f3090;
+    private final Schema f3100;
+    private final Schema f3110;
+    private final Schema f3120;
+    private final Schema f3130;
+    private final Schema f3140;
+    private final Schema f3150;
+    private final Schema f3160;
+    private final Schema f3170;
+    private final Schema f3180;
+    private final Schema f3190;
+    private final Schema f3200;
+    private final Schema f3210;
+    private final Schema f3220;
+    private final Schema f3230;
+    private final Schema f3240;
+    private final Schema f3250;
+    private final Schema f3260;
+    private final Schema f3270;
+    private final Schema f3280;
+    private final Schema f3290;
+    private final Schema f3300;
+    private final Schema f3310;
+    private final Schema f3320;
+    private final Schema f3330;
+    private final Schema f3340;
+    private final Schema f3350;
+    private final Schema f3360;
+    private final Schema f3370;
+    private final Schema f3380;
+    private final Schema f3390;
+    private final Schema f3400;
+    private final Schema f3410;
+    private final Schema f3420;
+    private final Schema f3430;
+    private final Schema f3440;
+    private final Schema f3450;
+    private final Schema f3460;
+    private final Schema f3470;
+    private final Schema f3480;
+    private final Schema f3490;
+    private final Schema f3500;
+    private final Schema f3510;
+    private final Schema f3520;
+    private final Schema f3530;
+    private final Schema f3540;
+    private final Schema f3550;
+    private final Schema f3560;
+    private final Schema f3570;
+    private final Schema f3580;
+    private final Schema f3590;
+    private final Schema f3600;
+    private final Schema f3610;
+    private final Schema f3620;
+    private final Schema f3630;
+    private final Schema f3640;
+    private final Schema f3650;
+    private final Schema f3660;
+    private final Schema f3670;
+    private final Schema f3680;
+    private final Schema f3690;
+    private final Schema f3700;
+    private final Schema f3710;
+    private final Schema f3720;
+    private final Schema f3730;
+    private final Schema f3740;
+    private final Schema f3750;
+    private final Schema f3760;
+    private final Schema f3770;
+    private final Schema f3780;
+    private final Schema f3790;
+    private final Schema f3800;
+    private final Schema f3810;
+    private final Schema f3820;
+    private final Schema f3830;
+    private final Schema f3840;
+    private final Schema f3850;
+    private final Schema f3860;
+    private final Schema f3870;
+    private final Schema f3880;
+    private final Schema f3890;
+    private final Schema f3900;
+    private final Schema f3910;
+    private final Schema f3920;
+    private final Schema f3930;
+    private final Schema f3940;
+    private final Schema f3950;
+    private final Schema f3960;
+    private final Schema f3970;
+    private final Schema f3980;
+    private final Schema f3990;
+    private final Schema f4000;
+    private final Schema f4010;
+    private final Schema f4020;
+    private final Schema f4030;
+    private final Schema f4040;
+    private final Schema f4050;
+    private final Schema f4060;
+    private final Schema f4070;
+    private final Schema f4080;
+    private final Schema f4090;
+    private final Schema f4100;
+    private final Schema f4110;
+    private final Schema f4120;
+    private final Schema f4130;
+    private final Schema f4140;
+    private final Schema f4150;
+    private final Schema f4160;
+    private final Schema f4170;
+    private final Schema f4180;
+    private final Schema f4190;
+    private final Schema f4200;
+    private final Schema f4210;
+    private final Schema f4220;
+    private final Schema f4230;
+    private final Schema f4240;
+    private final Schema f4250;
+    private final Schema f4260;
+    private final Schema f4270;
+    private final Schema f4280;
+    private final Schema f4290;
+    private final Schema f4300;
+    private final Schema f4310;
+    private final Schema f4320;
+    private final Schema f4330;
+    private final Schema f4340;
+    private final Schema f4350;
+    private final Schema f4360;
+    private final Schema f4370;
+    private final Schema f4380;
+    private final Schema f4390;
+    private final Schema f4400;
+    private final Schema f4410;
+    private final Schema f4420;
+    private final Schema f4430;
+    private final Schema f4440;
+    private final Schema f4450;
+    private final Schema f4460;
+    private final Schema f4470;
+    private final Schema f4480;
+    private final Schema f4490;
+    private final Schema f4500;
+    private final Schema f4510;
+    private final Schema f4520;
+    private final Schema f4530;
+    private final Schema f4540;
+    private final Schema f4550;
+    private final Schema f4560;
+    private final Schema f4570;
+    private final Schema f4580;
+    private final Schema f4590;
+    private final Schema f4600;
+    private final Schema f4610;
+    private final Schema f4620;
+    private final Schema f4630;
+    private final Schema f4640;
+    private final Schema f4650;
+    private final Schema f4660;
+    private final Schema f4670;
+    private final Schema f4680;
+    private final Schema f4690;
+    private final Schema f4700;
+    private final Schema f4710;
+    private final Schema f4720;
+    private final Schema f4730;
+    private final Schema f4740;
+    private final Schema f4750;
+    private final Schema f4760;
+    private final Schema f4770;
+    private final Schema f4780;
+    private final Schema f4790;
+    private final Schema f4800;
+    private final Schema f4810;
+    private final Schema f4820;
+    private final Schema f4830;
+    private final Schema f4840;
+    private final Schema f4850;
+    private final Schema f4860;
+    private final Schema f4870;
+    private final Schema f4880;
+    private final Schema f4890;
+    private final Schema f4900;
+    private final Schema f4910;
+    private final Schema f4920;
+    private final Schema f4930;
+    private final Schema f4940;
+    private final Schema f4950;
+    private final Schema f4960;
+    private final Schema f4970;
+    private final Schema f4980;
+    private final Schema f4990;
+    private final Schema f5000;
+    private final Schema f5010;
+    private final Schema f5020;
+    private final Schema f5030;
+    private final Schema f5040;
+    private final Schema f5050;
+    private final Schema f5060;
+    private final Schema f5070;
+    private final Schema f5080;
+    private final Schema f5090;
+    private final Schema f5100;
+    private final Schema f5110;
+    private final Schema f5120;
+    private final Schema f5130;
+    private final Schema f5140;
+    private final Schema f5150;
+    private final Schema f5160;
+    private final Schema f5170;
+    private final Schema f5180;
+    private final Schema f5190;
+    private final Schema f5200;
+    private final Schema f5210;
+    private final Schema f5220;
+    private final Schema f5230;
+    private final Schema f5240;
+    private final Schema f5250;
+    private final Schema f5260;
+    private final Schema f5270;
+    private final Schema f5280;
+    private final Schema f5290;
+    private final Schema f5300;
+    private final Schema f5310;
+    private final Schema f5320;
+    private final Schema f5330;
+    private final Schema f5340;
+    private final Schema f5350;
+    private final Schema f5360;
+    private final Schema f5370;
+    private final Schema f5380;
+    private final Schema f5390;
+    private final Schema f5400;
+    private final Schema f5410;
+    private final Schema f5420;
+    private final Schema f5430;
+    private final Schema f5440;
+    private final Schema f5450;
+    private final Schema f5460;
+    private final Schema f5470;
+    private final Schema f5480;
+    private final Schema f5490;
+    private final Schema f5500;
+    private final Schema f5510;
+    private final Schema f5520;
+    private final Schema f5530;
+    private final Schema f5540;
+    private final Schema f5550;
+    private final Schema f5560;
+    private final Schema f5570;
+    private final Schema f5580;
+    private final Schema f5590;
+    private final Schema f5600;
+    private final Schema f5610;
+    private final Schema f5620;
+    private final Schema f5630;
+    private final Schema f5640;
+    private final Schema f5650;
+    private final Schema f5660;
+    private final Schema f5670;
+    private final Schema f5680;
+    private final Schema f5690;
+    private final Schema f5700;
+    private final Schema f5710;
+    private final Schema f5720;
+    private final Schema f5730;
+    private final Schema f5740;
+    private final Schema f5750;
+    private final Schema f5760;
+    private final Schema f5770;
+    private final Schema f5780;
+    private final Schema f5790;
+    private final Schema f5800;
+    private final Schema f5810;
+    private final Schema f5820;
+    private final Schema f5830;
+    private final Schema f5840;
+    private final Schema f5850;
+    private final Schema f5860;
+    private final Schema f5870;
+    private final Schema f5880;
+    private final Schema f5890;
+    private final Schema f5900;
+    private final Schema f5910;
+    private final Schema f5920;
+    private final Schema f5930;
+    private final Schema f5940;
+    private final Schema f5950;
+    private final Schema f5960;
+    private final Schema f5970;
+    private final Schema f5980;
+    private final Schema f5990;
+    private final Schema f6000;
+    private final Schema f6010;
+    private final Schema f6020;
+    private final Schema f6030;
+    private final Schema f6040;
+    private final Schema f6050;
+    private final Schema f6060;
+    private final Schema f6070;
+    private final Schema f6080;
+    private final Schema f6090;
+    private final Schema f6100;
+    private final Schema f6110;
+    private final Schema f6120;
+    private final Schema f6130;
+    private final Schema f6140;
+    private final Schema f6150;
+    private final Schema f6160;
+    private final Schema f6170;
+    private final Schema f6180;
+    private final Schema f6190;
+    private final Schema f6200;
+    private final Schema f6210;
+    private final Schema f6220;
+    private final Schema f6230;
+    private final Schema f6240;
+    private final Schema f6250;
+    private final Schema f6260;
+    private final Schema f6270;
+    private final Schema f6280;
+    private final Schema f6290;
+    private final Schema f6300;
+    private final Schema f6310;
+    private final Schema f6320;
+    private final Schema f6330;
+    private final Schema f6340;
+    private final Schema f6350;
+    private final Schema f6360;
+    private final Schema f6370;
+    private final Schema f6380;
+    private final Schema f6390;
+    private final Schema f6400;
+    private final Schema f6410;
+    private final Schema f6420;
+    private final Schema f6430;
+    private final Schema f6440;
+    private final Schema f6450;
+    private final Schema f6460;
+    private final Schema f6470;
+    private final Schema f6480;
+    private final Schema f6490;
+    private final Schema f6500;
+    private final Schema f6510;
+    private final Schema f6520;
+    private final Schema f6530;
+    private final Schema f6540;
+    private final Schema f6550;
+    private final Schema f6560;
+    private final Schema f6570;
+    private final Schema f6580;
+    private final Schema f6590;
+    private final Schema f6600;
+    private final Schema f6610;
+    private final Schema f6620;
+    private final Schema f6630;
+    private final Schema f6640;
+    private final Schema f6650;
+    private final Schema f6660;
+    private final Schema f6670;
+    private final Schema f6680;
+    private final Schema f6690;
+    private final Schema f6700;
+    private final Schema f6710;
+    private final Schema f6720;
+    private final Schema f6730;
+    private final Schema f6740;
+    private final Schema f6750;
+    private final Schema f6760;
+    private final Schema f6770;
+    private final Schema f6780;
+    private final Schema f6790;
+    private final Schema f6800;
+    private final Schema f6810;
+    private final Schema f6820;
+    private final Schema f6830;
+    private final Schema f6840;
+    private final Schema f6850;
+    private final Schema f6860;
+    private final Schema f6870;
+    private final Schema f6880;
+    private final Schema f6890;
+    private final Schema f6900;
+    private final Schema f6910;
+    private final Schema f6920;
+    private final Schema f6930;
+    private final Schema f6940;
+    private final Schema f6950;
+    private final Schema f6960;
+    private final Schema f6970;
+    private final Schema f6980;
+    private final Schema f6990;
+    private final Schema f7000;
+    private final Schema f7010;
+    private final Schema f7020;
+    private final Schema f7030;
+    private final Schema f7040;
+    private final Schema f7050;
+    private final Schema f7060;
+    private final Schema f7070;
+    private final Schema f7080;
+    private final Schema f7090;
+    private final Schema f7100;
+    private final Schema f7110;
+    private final Schema f7120;
+    private final Schema f7130;
+    private final Schema f7140;
+    private final Schema f7150;
+    private final Schema f7160;
+    private final Schema f7170;
+    private final Schema f7180;
+    private final Schema f7190;
+    private final Schema f7200;
+    private final Schema f7210;
+    private final Schema f7220;
+    private final Schema f7230;
+    private final Schema f7240;
+    private final Schema f7250;
+    private final Schema f7260;
+    private final Schema f7270;
+    private final Schema f7280;
+    private final Schema f7290;
+    private final Schema f7300;
+    private final Schema f7310;
+    private final Schema f7320;
+    private final Schema f7330;
+    private final Schema f7340;
+    private final Schema f7350;
+    private final Schema f7360;
+    private final Schema f7370;
+    private final Schema f7380;
+    private final Schema f7390;
+    private final Schema f7400;
+    private final Schema f7410;
+    private final Schema f7420;
+    private final Schema f7430;
+    private final Schema f7440;
+    private final Schema f7450;
+    private final Schema f7460;
+    private final Schema f7470;
+    private final Schema f7480;
+    private final Schema f7490;
+    private final Schema f7500;
+    private final Schema f7510;
+    private final Schema f7520;
+    private final Schema f7530;
+    private final Schema f7540;
+    private final Schema f7550;
+    private final Schema f7560;
+    private final Schema f7570;
+    private final Schema f7580;
+    private final Schema f7590;
+    private final Schema f7600;
+    private final Schema f7610;
+    private final Schema f7620;
+    private final Schema f7630;
+    private final Schema f7640;
+    private final Schema f7650;
+    private final Schema f7660;
+    private final Schema f7670;
+    private final Schema f7680;
+    private final Schema f7690;
+    private final Schema f7700;
+    private final Schema f7710;
+    private final Schema f7720;
+    private final Schema f7730;
+    private final Schema f7740;
+    private final Schema f7750;
+    private final Schema f7760;
+    private final Schema f7770;
+    private final Schema f7780;
+    private final Schema f7790;
+    private final Schema f7800;
+    private final Schema f7810;
+    private final Schema f7820;
+    private final Schema f7830;
+    private final Schema f7840;
+    private final Schema f7850;
+    private final Schema f7860;
+    private final Schema f7870;
+    private final Schema f7880;
+    private final Schema f7890;
+    private final Schema f7900;
+    private final Schema f7910;
+    private final Schema f7920;
+    private final Schema f7930;
+    private final Schema f7940;
+    private final Schema f7950;
+    private final Schema f7960;
+    private final Schema f7970;
+    private final Schema f7980;
+    private final Schema f7990;
+    private final Schema f8000;
+    private final Schema f8010;
+    private final Schema f8020;
+    private final Schema f8030;
+    private final Schema f8040;
+    private final Schema f8050;
+    private final Schema f8060;
+    private final Schema f8070;
+    private final Schema f8080;
+    private final Schema f8090;
+    private final Schema f8100;
+    private final Schema f8110;
+    private final Schema f8120;
+    private final Schema f8130;
+    private final Schema f8140;
+    private final Schema f8150;
+    private final Schema f8160;
+    private final Schema f8170;
+    private final Schema f8180;
+    private final Schema f8190;
+    private final Schema f8200;
+    private final Schema f8210;
+    private final Schema f8220;
+    private final Schema f8230;
+    private final Schema f8240;
+    private final Schema f8250;
+    private final Schema f8260;
+    private final Schema f8270;
+    private final Schema f8280;
+    private final Schema f8290;
+    private final Schema f8300;
+    private final Schema f8310;
+    private final Schema f8320;
+    private final Schema f8330;
+    private final Schema f8340;
+    private final Schema f8350;
+    private final Schema f8360;
+    private final Schema f8370;
+    private final Schema f8380;
+    private final Schema f8390;
+    private final Schema f8400;
+    private final Schema f8410;
+    private final Schema f8420;
+    private final Schema f8430;
+    private final Schema f8440;
+    private final Schema f8450;
+    private final Schema f8460;
+    private final Schema f8470;
+    private final Schema f8480;
+    private final Schema f8490;
+    private final Schema f8500;
+    private final Schema f8510;
+    private final Schema f8520;
+    private final Schema f8530;
+    private final Schema f8540;
+    private final Schema f8550;
+    private final Schema f8560;
+    private final Schema f8570;
+    private final Schema f8580;
+    private final Schema f8590;
+    private final Schema f8600;
+    private final Schema f8610;
+    private final Schema f8620;
+    private final Schema f8630;
+    private final Schema f8640;
+    private final Schema f8650;
+    private final Schema f8660;
+    private final Schema f8670;
+    private final Schema f8680;
+    private final Schema f8690;
+    private final Schema f8700;
+    private final Schema f8710;
+    private final Schema f8720;
+    private final Schema f8730;
+    private final Schema f8740;
+    private final Schema f8750;
+    private final Schema f8760;
+    private final Schema f8770;
+    private final Schema f8780;
+    private final Schema f8790;
+    private final Schema f8800;
+    private final Schema f8810;
+    private final Schema f8820;
+    private final Schema f8830;
+    private final Schema f8840;
+    private final Schema f8850;
+    private final Schema f8860;
+    private final Schema f8870;
+    private final Schema f8880;
+    private final Schema f8890;
+    private final Schema f8900;
+    private final Schema f8910;
+    private final Schema f8920;
+    private final Schema f8930;
+    private final Schema f8940;
+    private final Schema f8950;
+    private final Schema f8960;
+    private final Schema f8970;
+    private final Schema f8980;
+    private final Schema f8990;
+    private final Schema f9000;
+    private final Schema f9010;
+    private final Schema f9020;
+    private final Schema f9030;
+    private final Schema f9040;
+    private final Schema f9050;
+    private final Schema f9060;
+    private final Schema f9070;
+    private final Schema f9080;
+    private final Schema f9090;
+    private final Schema f9100;
+    private final Schema f9110;
+    private final Schema f9120;
+    private final Schema f9130;
+    private final Schema f9140;
+    private final Schema f9150;
+    private final Schema f9160;
+    private final Schema f9170;
+    private final Schema f9180;
+    private final Schema f9190;
+    private final Schema f9200;
+    private final Schema f9210;
+    private final Schema f9220;
+    private final Schema f9230;
+    private final Schema f9240;
+    private final Schema f9250;
+    private final Schema f9260;
+    private final Schema f9270;
+    private final Schema f9280;
+    private final Schema f9290;
+    private final Schema f9300;
+    private final Schema f9310;
+    private final Schema f9320;
+    private final Schema f9330;
+    private final Schema f9340;
+    private final Schema f9350;
+    private final Schema f9360;
+    private final Schema f9370;
+    private final Schema f9380;
+    private final Schema f9390;
+    private final Schema f9400;
+    private final Schema f9410;
+    private final Schema f9420;
+    private final Schema f9430;
+    private final Schema f9440;
+    private final Schema f9450;
+    private final Schema f9460;
+    private final Schema f9470;
+    private final Schema f9480;
+    private final Schema f9490;
+    private final Schema f9500;
+    private final Schema f9510;
+    private final Schema f9520;
+    private final Schema f9530;
+    private final Schema f9540;
+    private final Schema f9550;
+    private final Schema f9560;
+    private final Schema f9570;
+    private final Schema f9580;
+    private final Schema f9590;
+    private final Schema f9600;
+    private final Schema f9610;
+    private final Schema f9620;
+    private final Schema f9630;
+    private final Schema f9640;
+    private final Schema f9650;
+    private final Schema f9660;
+    private final Schema f9670;
+    private final Schema f9680;
+    private final Schema f9690;
+    private final Schema f9700;
+    private final Schema f9710;
+    private final Schema f9720;
+    private final Schema f9730;
+    private final Schema f9740;
+    private final Schema f9750;
+    private final Schema f9760;
+    private final Schema f9770;
+    private final Schema f9780;
+    private final Schema f9790;
+    private final Schema f9800;
+    private final Schema f9810;
+    private final Schema f9820;
+    private final Schema f9830;
+    private final Schema f9840;
+    private final Schema f9850;
+    private final Schema f9860;
+    private final Schema f9870;
+    private final Schema f9880;
+    private final Schema f9890;
+    private final Schema f9900;
+    private final Schema f9910;
+    private final Schema f9920;
+    private final Schema f9930;
+    private final Schema f9940;
+    private final Schema f9950;
+    private final Schema f9960;
+    private final Schema f9970;
+    private final Schema f9980;
+    private final Schema f9990;
+
+    public FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema_GenericDeserializer_836892732_836892732(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.f00 = readerSchema.getField("F0").schema();
+        this.f10 = readerSchema.getField("F1").schema();
+        this.f20 = readerSchema.getField("F2").schema();
+        this.f30 = readerSchema.getField("F3").schema();
+        this.f40 = readerSchema.getField("F4").schema();
+        this.f50 = readerSchema.getField("F5").schema();
+        this.f60 = readerSchema.getField("F6").schema();
+        this.f70 = readerSchema.getField("F7").schema();
+        this.f80 = readerSchema.getField("F8").schema();
+        this.f90 = readerSchema.getField("F9").schema();
+        this.f100 = readerSchema.getField("F10").schema();
+        this.f110 = readerSchema.getField("F11").schema();
+        this.f120 = readerSchema.getField("F12").schema();
+        this.f130 = readerSchema.getField("F13").schema();
+        this.f140 = readerSchema.getField("F14").schema();
+        this.f150 = readerSchema.getField("F15").schema();
+        this.f160 = readerSchema.getField("F16").schema();
+        this.f170 = readerSchema.getField("F17").schema();
+        this.f180 = readerSchema.getField("F18").schema();
+        this.f190 = readerSchema.getField("F19").schema();
+        this.f200 = readerSchema.getField("F20").schema();
+        this.f210 = readerSchema.getField("F21").schema();
+        this.f220 = readerSchema.getField("F22").schema();
+        this.f230 = readerSchema.getField("F23").schema();
+        this.f240 = readerSchema.getField("F24").schema();
+        this.f250 = readerSchema.getField("F25").schema();
+        this.f260 = readerSchema.getField("F26").schema();
+        this.f270 = readerSchema.getField("F27").schema();
+        this.f280 = readerSchema.getField("F28").schema();
+        this.f290 = readerSchema.getField("F29").schema();
+        this.f300 = readerSchema.getField("F30").schema();
+        this.f310 = readerSchema.getField("F31").schema();
+        this.f320 = readerSchema.getField("F32").schema();
+        this.f330 = readerSchema.getField("F33").schema();
+        this.f340 = readerSchema.getField("F34").schema();
+        this.f350 = readerSchema.getField("F35").schema();
+        this.f360 = readerSchema.getField("F36").schema();
+        this.f370 = readerSchema.getField("F37").schema();
+        this.f380 = readerSchema.getField("F38").schema();
+        this.f390 = readerSchema.getField("F39").schema();
+        this.f400 = readerSchema.getField("F40").schema();
+        this.f410 = readerSchema.getField("F41").schema();
+        this.f420 = readerSchema.getField("F42").schema();
+        this.f430 = readerSchema.getField("F43").schema();
+        this.f440 = readerSchema.getField("F44").schema();
+        this.f450 = readerSchema.getField("F45").schema();
+        this.f460 = readerSchema.getField("F46").schema();
+        this.f470 = readerSchema.getField("F47").schema();
+        this.f480 = readerSchema.getField("F48").schema();
+        this.f490 = readerSchema.getField("F49").schema();
+        this.f500 = readerSchema.getField("F50").schema();
+        this.f510 = readerSchema.getField("F51").schema();
+        this.f520 = readerSchema.getField("F52").schema();
+        this.f530 = readerSchema.getField("F53").schema();
+        this.f540 = readerSchema.getField("F54").schema();
+        this.f550 = readerSchema.getField("F55").schema();
+        this.f560 = readerSchema.getField("F56").schema();
+        this.f570 = readerSchema.getField("F57").schema();
+        this.f580 = readerSchema.getField("F58").schema();
+        this.f590 = readerSchema.getField("F59").schema();
+        this.f600 = readerSchema.getField("F60").schema();
+        this.f610 = readerSchema.getField("F61").schema();
+        this.f620 = readerSchema.getField("F62").schema();
+        this.f630 = readerSchema.getField("F63").schema();
+        this.f640 = readerSchema.getField("F64").schema();
+        this.f650 = readerSchema.getField("F65").schema();
+        this.f660 = readerSchema.getField("F66").schema();
+        this.f670 = readerSchema.getField("F67").schema();
+        this.f680 = readerSchema.getField("F68").schema();
+        this.f690 = readerSchema.getField("F69").schema();
+        this.f700 = readerSchema.getField("F70").schema();
+        this.f710 = readerSchema.getField("F71").schema();
+        this.f720 = readerSchema.getField("F72").schema();
+        this.f730 = readerSchema.getField("F73").schema();
+        this.f740 = readerSchema.getField("F74").schema();
+        this.f750 = readerSchema.getField("F75").schema();
+        this.f760 = readerSchema.getField("F76").schema();
+        this.f770 = readerSchema.getField("F77").schema();
+        this.f780 = readerSchema.getField("F78").schema();
+        this.f790 = readerSchema.getField("F79").schema();
+        this.f800 = readerSchema.getField("F80").schema();
+        this.f810 = readerSchema.getField("F81").schema();
+        this.f820 = readerSchema.getField("F82").schema();
+        this.f830 = readerSchema.getField("F83").schema();
+        this.f840 = readerSchema.getField("F84").schema();
+        this.f850 = readerSchema.getField("F85").schema();
+        this.f860 = readerSchema.getField("F86").schema();
+        this.f870 = readerSchema.getField("F87").schema();
+        this.f880 = readerSchema.getField("F88").schema();
+        this.f890 = readerSchema.getField("F89").schema();
+        this.f900 = readerSchema.getField("F90").schema();
+        this.f910 = readerSchema.getField("F91").schema();
+        this.f920 = readerSchema.getField("F92").schema();
+        this.f930 = readerSchema.getField("F93").schema();
+        this.f940 = readerSchema.getField("F94").schema();
+        this.f950 = readerSchema.getField("F95").schema();
+        this.f960 = readerSchema.getField("F96").schema();
+        this.f970 = readerSchema.getField("F97").schema();
+        this.f980 = readerSchema.getField("F98").schema();
+        this.f990 = readerSchema.getField("F99").schema();
+        this.f1000 = readerSchema.getField("F100").schema();
+        this.f1010 = readerSchema.getField("F101").schema();
+        this.f1020 = readerSchema.getField("F102").schema();
+        this.f1030 = readerSchema.getField("F103").schema();
+        this.f1040 = readerSchema.getField("F104").schema();
+        this.f1050 = readerSchema.getField("F105").schema();
+        this.f1060 = readerSchema.getField("F106").schema();
+        this.f1070 = readerSchema.getField("F107").schema();
+        this.f1080 = readerSchema.getField("F108").schema();
+        this.f1090 = readerSchema.getField("F109").schema();
+        this.f1100 = readerSchema.getField("F110").schema();
+        this.f1110 = readerSchema.getField("F111").schema();
+        this.f1120 = readerSchema.getField("F112").schema();
+        this.f1130 = readerSchema.getField("F113").schema();
+        this.f1140 = readerSchema.getField("F114").schema();
+        this.f1150 = readerSchema.getField("F115").schema();
+        this.f1160 = readerSchema.getField("F116").schema();
+        this.f1170 = readerSchema.getField("F117").schema();
+        this.f1180 = readerSchema.getField("F118").schema();
+        this.f1190 = readerSchema.getField("F119").schema();
+        this.f1200 = readerSchema.getField("F120").schema();
+        this.f1210 = readerSchema.getField("F121").schema();
+        this.f1220 = readerSchema.getField("F122").schema();
+        this.f1230 = readerSchema.getField("F123").schema();
+        this.f1240 = readerSchema.getField("F124").schema();
+        this.f1250 = readerSchema.getField("F125").schema();
+        this.f1260 = readerSchema.getField("F126").schema();
+        this.f1270 = readerSchema.getField("F127").schema();
+        this.f1280 = readerSchema.getField("F128").schema();
+        this.f1290 = readerSchema.getField("F129").schema();
+        this.f1300 = readerSchema.getField("F130").schema();
+        this.f1310 = readerSchema.getField("F131").schema();
+        this.f1320 = readerSchema.getField("F132").schema();
+        this.f1330 = readerSchema.getField("F133").schema();
+        this.f1340 = readerSchema.getField("F134").schema();
+        this.f1350 = readerSchema.getField("F135").schema();
+        this.f1360 = readerSchema.getField("F136").schema();
+        this.f1370 = readerSchema.getField("F137").schema();
+        this.f1380 = readerSchema.getField("F138").schema();
+        this.f1390 = readerSchema.getField("F139").schema();
+        this.f1400 = readerSchema.getField("F140").schema();
+        this.f1410 = readerSchema.getField("F141").schema();
+        this.f1420 = readerSchema.getField("F142").schema();
+        this.f1430 = readerSchema.getField("F143").schema();
+        this.f1440 = readerSchema.getField("F144").schema();
+        this.f1450 = readerSchema.getField("F145").schema();
+        this.f1460 = readerSchema.getField("F146").schema();
+        this.f1470 = readerSchema.getField("F147").schema();
+        this.f1480 = readerSchema.getField("F148").schema();
+        this.f1490 = readerSchema.getField("F149").schema();
+        this.f1500 = readerSchema.getField("F150").schema();
+        this.f1510 = readerSchema.getField("F151").schema();
+        this.f1520 = readerSchema.getField("F152").schema();
+        this.f1530 = readerSchema.getField("F153").schema();
+        this.f1540 = readerSchema.getField("F154").schema();
+        this.f1550 = readerSchema.getField("F155").schema();
+        this.f1560 = readerSchema.getField("F156").schema();
+        this.f1570 = readerSchema.getField("F157").schema();
+        this.f1580 = readerSchema.getField("F158").schema();
+        this.f1590 = readerSchema.getField("F159").schema();
+        this.f1600 = readerSchema.getField("F160").schema();
+        this.f1610 = readerSchema.getField("F161").schema();
+        this.f1620 = readerSchema.getField("F162").schema();
+        this.f1630 = readerSchema.getField("F163").schema();
+        this.f1640 = readerSchema.getField("F164").schema();
+        this.f1650 = readerSchema.getField("F165").schema();
+        this.f1660 = readerSchema.getField("F166").schema();
+        this.f1670 = readerSchema.getField("F167").schema();
+        this.f1680 = readerSchema.getField("F168").schema();
+        this.f1690 = readerSchema.getField("F169").schema();
+        this.f1700 = readerSchema.getField("F170").schema();
+        this.f1710 = readerSchema.getField("F171").schema();
+        this.f1720 = readerSchema.getField("F172").schema();
+        this.f1730 = readerSchema.getField("F173").schema();
+        this.f1740 = readerSchema.getField("F174").schema();
+        this.f1750 = readerSchema.getField("F175").schema();
+        this.f1760 = readerSchema.getField("F176").schema();
+        this.f1770 = readerSchema.getField("F177").schema();
+        this.f1780 = readerSchema.getField("F178").schema();
+        this.f1790 = readerSchema.getField("F179").schema();
+        this.f1800 = readerSchema.getField("F180").schema();
+        this.f1810 = readerSchema.getField("F181").schema();
+        this.f1820 = readerSchema.getField("F182").schema();
+        this.f1830 = readerSchema.getField("F183").schema();
+        this.f1840 = readerSchema.getField("F184").schema();
+        this.f1850 = readerSchema.getField("F185").schema();
+        this.f1860 = readerSchema.getField("F186").schema();
+        this.f1870 = readerSchema.getField("F187").schema();
+        this.f1880 = readerSchema.getField("F188").schema();
+        this.f1890 = readerSchema.getField("F189").schema();
+        this.f1900 = readerSchema.getField("F190").schema();
+        this.f1910 = readerSchema.getField("F191").schema();
+        this.f1920 = readerSchema.getField("F192").schema();
+        this.f1930 = readerSchema.getField("F193").schema();
+        this.f1940 = readerSchema.getField("F194").schema();
+        this.f1950 = readerSchema.getField("F195").schema();
+        this.f1960 = readerSchema.getField("F196").schema();
+        this.f1970 = readerSchema.getField("F197").schema();
+        this.f1980 = readerSchema.getField("F198").schema();
+        this.f1990 = readerSchema.getField("F199").schema();
+        this.f2000 = readerSchema.getField("F200").schema();
+        this.f2010 = readerSchema.getField("F201").schema();
+        this.f2020 = readerSchema.getField("F202").schema();
+        this.f2030 = readerSchema.getField("F203").schema();
+        this.f2040 = readerSchema.getField("F204").schema();
+        this.f2050 = readerSchema.getField("F205").schema();
+        this.f2060 = readerSchema.getField("F206").schema();
+        this.f2070 = readerSchema.getField("F207").schema();
+        this.f2080 = readerSchema.getField("F208").schema();
+        this.f2090 = readerSchema.getField("F209").schema();
+        this.f2100 = readerSchema.getField("F210").schema();
+        this.f2110 = readerSchema.getField("F211").schema();
+        this.f2120 = readerSchema.getField("F212").schema();
+        this.f2130 = readerSchema.getField("F213").schema();
+        this.f2140 = readerSchema.getField("F214").schema();
+        this.f2150 = readerSchema.getField("F215").schema();
+        this.f2160 = readerSchema.getField("F216").schema();
+        this.f2170 = readerSchema.getField("F217").schema();
+        this.f2180 = readerSchema.getField("F218").schema();
+        this.f2190 = readerSchema.getField("F219").schema();
+        this.f2200 = readerSchema.getField("F220").schema();
+        this.f2210 = readerSchema.getField("F221").schema();
+        this.f2220 = readerSchema.getField("F222").schema();
+        this.f2230 = readerSchema.getField("F223").schema();
+        this.f2240 = readerSchema.getField("F224").schema();
+        this.f2250 = readerSchema.getField("F225").schema();
+        this.f2260 = readerSchema.getField("F226").schema();
+        this.f2270 = readerSchema.getField("F227").schema();
+        this.f2280 = readerSchema.getField("F228").schema();
+        this.f2290 = readerSchema.getField("F229").schema();
+        this.f2300 = readerSchema.getField("F230").schema();
+        this.f2310 = readerSchema.getField("F231").schema();
+        this.f2320 = readerSchema.getField("F232").schema();
+        this.f2330 = readerSchema.getField("F233").schema();
+        this.f2340 = readerSchema.getField("F234").schema();
+        this.f2350 = readerSchema.getField("F235").schema();
+        this.f2360 = readerSchema.getField("F236").schema();
+        this.f2370 = readerSchema.getField("F237").schema();
+        this.f2380 = readerSchema.getField("F238").schema();
+        this.f2390 = readerSchema.getField("F239").schema();
+        this.f2400 = readerSchema.getField("F240").schema();
+        this.f2410 = readerSchema.getField("F241").schema();
+        this.f2420 = readerSchema.getField("F242").schema();
+        this.f2430 = readerSchema.getField("F243").schema();
+        this.f2440 = readerSchema.getField("F244").schema();
+        this.f2450 = readerSchema.getField("F245").schema();
+        this.f2460 = readerSchema.getField("F246").schema();
+        this.f2470 = readerSchema.getField("F247").schema();
+        this.f2480 = readerSchema.getField("F248").schema();
+        this.f2490 = readerSchema.getField("F249").schema();
+        this.f2500 = readerSchema.getField("F250").schema();
+        this.f2510 = readerSchema.getField("F251").schema();
+        this.f2520 = readerSchema.getField("F252").schema();
+        this.f2530 = readerSchema.getField("F253").schema();
+        this.f2540 = readerSchema.getField("F254").schema();
+        this.f2550 = readerSchema.getField("F255").schema();
+        this.f2560 = readerSchema.getField("F256").schema();
+        this.f2570 = readerSchema.getField("F257").schema();
+        this.f2580 = readerSchema.getField("F258").schema();
+        this.f2590 = readerSchema.getField("F259").schema();
+        this.f2600 = readerSchema.getField("F260").schema();
+        this.f2610 = readerSchema.getField("F261").schema();
+        this.f2620 = readerSchema.getField("F262").schema();
+        this.f2630 = readerSchema.getField("F263").schema();
+        this.f2640 = readerSchema.getField("F264").schema();
+        this.f2650 = readerSchema.getField("F265").schema();
+        this.f2660 = readerSchema.getField("F266").schema();
+        this.f2670 = readerSchema.getField("F267").schema();
+        this.f2680 = readerSchema.getField("F268").schema();
+        this.f2690 = readerSchema.getField("F269").schema();
+        this.f2700 = readerSchema.getField("F270").schema();
+        this.f2710 = readerSchema.getField("F271").schema();
+        this.f2720 = readerSchema.getField("F272").schema();
+        this.f2730 = readerSchema.getField("F273").schema();
+        this.f2740 = readerSchema.getField("F274").schema();
+        this.f2750 = readerSchema.getField("F275").schema();
+        this.f2760 = readerSchema.getField("F276").schema();
+        this.f2770 = readerSchema.getField("F277").schema();
+        this.f2780 = readerSchema.getField("F278").schema();
+        this.f2790 = readerSchema.getField("F279").schema();
+        this.f2800 = readerSchema.getField("F280").schema();
+        this.f2810 = readerSchema.getField("F281").schema();
+        this.f2820 = readerSchema.getField("F282").schema();
+        this.f2830 = readerSchema.getField("F283").schema();
+        this.f2840 = readerSchema.getField("F284").schema();
+        this.f2850 = readerSchema.getField("F285").schema();
+        this.f2860 = readerSchema.getField("F286").schema();
+        this.f2870 = readerSchema.getField("F287").schema();
+        this.f2880 = readerSchema.getField("F288").schema();
+        this.f2890 = readerSchema.getField("F289").schema();
+        this.f2900 = readerSchema.getField("F290").schema();
+        this.f2910 = readerSchema.getField("F291").schema();
+        this.f2920 = readerSchema.getField("F292").schema();
+        this.f2930 = readerSchema.getField("F293").schema();
+        this.f2940 = readerSchema.getField("F294").schema();
+        this.f2950 = readerSchema.getField("F295").schema();
+        this.f2960 = readerSchema.getField("F296").schema();
+        this.f2970 = readerSchema.getField("F297").schema();
+        this.f2980 = readerSchema.getField("F298").schema();
+        this.f2990 = readerSchema.getField("F299").schema();
+        this.f3000 = readerSchema.getField("F300").schema();
+        this.f3010 = readerSchema.getField("F301").schema();
+        this.f3020 = readerSchema.getField("F302").schema();
+        this.f3030 = readerSchema.getField("F303").schema();
+        this.f3040 = readerSchema.getField("F304").schema();
+        this.f3050 = readerSchema.getField("F305").schema();
+        this.f3060 = readerSchema.getField("F306").schema();
+        this.f3070 = readerSchema.getField("F307").schema();
+        this.f3080 = readerSchema.getField("F308").schema();
+        this.f3090 = readerSchema.getField("F309").schema();
+        this.f3100 = readerSchema.getField("F310").schema();
+        this.f3110 = readerSchema.getField("F311").schema();
+        this.f3120 = readerSchema.getField("F312").schema();
+        this.f3130 = readerSchema.getField("F313").schema();
+        this.f3140 = readerSchema.getField("F314").schema();
+        this.f3150 = readerSchema.getField("F315").schema();
+        this.f3160 = readerSchema.getField("F316").schema();
+        this.f3170 = readerSchema.getField("F317").schema();
+        this.f3180 = readerSchema.getField("F318").schema();
+        this.f3190 = readerSchema.getField("F319").schema();
+        this.f3200 = readerSchema.getField("F320").schema();
+        this.f3210 = readerSchema.getField("F321").schema();
+        this.f3220 = readerSchema.getField("F322").schema();
+        this.f3230 = readerSchema.getField("F323").schema();
+        this.f3240 = readerSchema.getField("F324").schema();
+        this.f3250 = readerSchema.getField("F325").schema();
+        this.f3260 = readerSchema.getField("F326").schema();
+        this.f3270 = readerSchema.getField("F327").schema();
+        this.f3280 = readerSchema.getField("F328").schema();
+        this.f3290 = readerSchema.getField("F329").schema();
+        this.f3300 = readerSchema.getField("F330").schema();
+        this.f3310 = readerSchema.getField("F331").schema();
+        this.f3320 = readerSchema.getField("F332").schema();
+        this.f3330 = readerSchema.getField("F333").schema();
+        this.f3340 = readerSchema.getField("F334").schema();
+        this.f3350 = readerSchema.getField("F335").schema();
+        this.f3360 = readerSchema.getField("F336").schema();
+        this.f3370 = readerSchema.getField("F337").schema();
+        this.f3380 = readerSchema.getField("F338").schema();
+        this.f3390 = readerSchema.getField("F339").schema();
+        this.f3400 = readerSchema.getField("F340").schema();
+        this.f3410 = readerSchema.getField("F341").schema();
+        this.f3420 = readerSchema.getField("F342").schema();
+        this.f3430 = readerSchema.getField("F343").schema();
+        this.f3440 = readerSchema.getField("F344").schema();
+        this.f3450 = readerSchema.getField("F345").schema();
+        this.f3460 = readerSchema.getField("F346").schema();
+        this.f3470 = readerSchema.getField("F347").schema();
+        this.f3480 = readerSchema.getField("F348").schema();
+        this.f3490 = readerSchema.getField("F349").schema();
+        this.f3500 = readerSchema.getField("F350").schema();
+        this.f3510 = readerSchema.getField("F351").schema();
+        this.f3520 = readerSchema.getField("F352").schema();
+        this.f3530 = readerSchema.getField("F353").schema();
+        this.f3540 = readerSchema.getField("F354").schema();
+        this.f3550 = readerSchema.getField("F355").schema();
+        this.f3560 = readerSchema.getField("F356").schema();
+        this.f3570 = readerSchema.getField("F357").schema();
+        this.f3580 = readerSchema.getField("F358").schema();
+        this.f3590 = readerSchema.getField("F359").schema();
+        this.f3600 = readerSchema.getField("F360").schema();
+        this.f3610 = readerSchema.getField("F361").schema();
+        this.f3620 = readerSchema.getField("F362").schema();
+        this.f3630 = readerSchema.getField("F363").schema();
+        this.f3640 = readerSchema.getField("F364").schema();
+        this.f3650 = readerSchema.getField("F365").schema();
+        this.f3660 = readerSchema.getField("F366").schema();
+        this.f3670 = readerSchema.getField("F367").schema();
+        this.f3680 = readerSchema.getField("F368").schema();
+        this.f3690 = readerSchema.getField("F369").schema();
+        this.f3700 = readerSchema.getField("F370").schema();
+        this.f3710 = readerSchema.getField("F371").schema();
+        this.f3720 = readerSchema.getField("F372").schema();
+        this.f3730 = readerSchema.getField("F373").schema();
+        this.f3740 = readerSchema.getField("F374").schema();
+        this.f3750 = readerSchema.getField("F375").schema();
+        this.f3760 = readerSchema.getField("F376").schema();
+        this.f3770 = readerSchema.getField("F377").schema();
+        this.f3780 = readerSchema.getField("F378").schema();
+        this.f3790 = readerSchema.getField("F379").schema();
+        this.f3800 = readerSchema.getField("F380").schema();
+        this.f3810 = readerSchema.getField("F381").schema();
+        this.f3820 = readerSchema.getField("F382").schema();
+        this.f3830 = readerSchema.getField("F383").schema();
+        this.f3840 = readerSchema.getField("F384").schema();
+        this.f3850 = readerSchema.getField("F385").schema();
+        this.f3860 = readerSchema.getField("F386").schema();
+        this.f3870 = readerSchema.getField("F387").schema();
+        this.f3880 = readerSchema.getField("F388").schema();
+        this.f3890 = readerSchema.getField("F389").schema();
+        this.f3900 = readerSchema.getField("F390").schema();
+        this.f3910 = readerSchema.getField("F391").schema();
+        this.f3920 = readerSchema.getField("F392").schema();
+        this.f3930 = readerSchema.getField("F393").schema();
+        this.f3940 = readerSchema.getField("F394").schema();
+        this.f3950 = readerSchema.getField("F395").schema();
+        this.f3960 = readerSchema.getField("F396").schema();
+        this.f3970 = readerSchema.getField("F397").schema();
+        this.f3980 = readerSchema.getField("F398").schema();
+        this.f3990 = readerSchema.getField("F399").schema();
+        this.f4000 = readerSchema.getField("F400").schema();
+        this.f4010 = readerSchema.getField("F401").schema();
+        this.f4020 = readerSchema.getField("F402").schema();
+        this.f4030 = readerSchema.getField("F403").schema();
+        this.f4040 = readerSchema.getField("F404").schema();
+        this.f4050 = readerSchema.getField("F405").schema();
+        this.f4060 = readerSchema.getField("F406").schema();
+        this.f4070 = readerSchema.getField("F407").schema();
+        this.f4080 = readerSchema.getField("F408").schema();
+        this.f4090 = readerSchema.getField("F409").schema();
+        this.f4100 = readerSchema.getField("F410").schema();
+        this.f4110 = readerSchema.getField("F411").schema();
+        this.f4120 = readerSchema.getField("F412").schema();
+        this.f4130 = readerSchema.getField("F413").schema();
+        this.f4140 = readerSchema.getField("F414").schema();
+        this.f4150 = readerSchema.getField("F415").schema();
+        this.f4160 = readerSchema.getField("F416").schema();
+        this.f4170 = readerSchema.getField("F417").schema();
+        this.f4180 = readerSchema.getField("F418").schema();
+        this.f4190 = readerSchema.getField("F419").schema();
+        this.f4200 = readerSchema.getField("F420").schema();
+        this.f4210 = readerSchema.getField("F421").schema();
+        this.f4220 = readerSchema.getField("F422").schema();
+        this.f4230 = readerSchema.getField("F423").schema();
+        this.f4240 = readerSchema.getField("F424").schema();
+        this.f4250 = readerSchema.getField("F425").schema();
+        this.f4260 = readerSchema.getField("F426").schema();
+        this.f4270 = readerSchema.getField("F427").schema();
+        this.f4280 = readerSchema.getField("F428").schema();
+        this.f4290 = readerSchema.getField("F429").schema();
+        this.f4300 = readerSchema.getField("F430").schema();
+        this.f4310 = readerSchema.getField("F431").schema();
+        this.f4320 = readerSchema.getField("F432").schema();
+        this.f4330 = readerSchema.getField("F433").schema();
+        this.f4340 = readerSchema.getField("F434").schema();
+        this.f4350 = readerSchema.getField("F435").schema();
+        this.f4360 = readerSchema.getField("F436").schema();
+        this.f4370 = readerSchema.getField("F437").schema();
+        this.f4380 = readerSchema.getField("F438").schema();
+        this.f4390 = readerSchema.getField("F439").schema();
+        this.f4400 = readerSchema.getField("F440").schema();
+        this.f4410 = readerSchema.getField("F441").schema();
+        this.f4420 = readerSchema.getField("F442").schema();
+        this.f4430 = readerSchema.getField("F443").schema();
+        this.f4440 = readerSchema.getField("F444").schema();
+        this.f4450 = readerSchema.getField("F445").schema();
+        this.f4460 = readerSchema.getField("F446").schema();
+        this.f4470 = readerSchema.getField("F447").schema();
+        this.f4480 = readerSchema.getField("F448").schema();
+        this.f4490 = readerSchema.getField("F449").schema();
+        this.f4500 = readerSchema.getField("F450").schema();
+        this.f4510 = readerSchema.getField("F451").schema();
+        this.f4520 = readerSchema.getField("F452").schema();
+        this.f4530 = readerSchema.getField("F453").schema();
+        this.f4540 = readerSchema.getField("F454").schema();
+        this.f4550 = readerSchema.getField("F455").schema();
+        this.f4560 = readerSchema.getField("F456").schema();
+        this.f4570 = readerSchema.getField("F457").schema();
+        this.f4580 = readerSchema.getField("F458").schema();
+        this.f4590 = readerSchema.getField("F459").schema();
+        this.f4600 = readerSchema.getField("F460").schema();
+        this.f4610 = readerSchema.getField("F461").schema();
+        this.f4620 = readerSchema.getField("F462").schema();
+        this.f4630 = readerSchema.getField("F463").schema();
+        this.f4640 = readerSchema.getField("F464").schema();
+        this.f4650 = readerSchema.getField("F465").schema();
+        this.f4660 = readerSchema.getField("F466").schema();
+        this.f4670 = readerSchema.getField("F467").schema();
+        this.f4680 = readerSchema.getField("F468").schema();
+        this.f4690 = readerSchema.getField("F469").schema();
+        this.f4700 = readerSchema.getField("F470").schema();
+        this.f4710 = readerSchema.getField("F471").schema();
+        this.f4720 = readerSchema.getField("F472").schema();
+        this.f4730 = readerSchema.getField("F473").schema();
+        this.f4740 = readerSchema.getField("F474").schema();
+        this.f4750 = readerSchema.getField("F475").schema();
+        this.f4760 = readerSchema.getField("F476").schema();
+        this.f4770 = readerSchema.getField("F477").schema();
+        this.f4780 = readerSchema.getField("F478").schema();
+        this.f4790 = readerSchema.getField("F479").schema();
+        this.f4800 = readerSchema.getField("F480").schema();
+        this.f4810 = readerSchema.getField("F481").schema();
+        this.f4820 = readerSchema.getField("F482").schema();
+        this.f4830 = readerSchema.getField("F483").schema();
+        this.f4840 = readerSchema.getField("F484").schema();
+        this.f4850 = readerSchema.getField("F485").schema();
+        this.f4860 = readerSchema.getField("F486").schema();
+        this.f4870 = readerSchema.getField("F487").schema();
+        this.f4880 = readerSchema.getField("F488").schema();
+        this.f4890 = readerSchema.getField("F489").schema();
+        this.f4900 = readerSchema.getField("F490").schema();
+        this.f4910 = readerSchema.getField("F491").schema();
+        this.f4920 = readerSchema.getField("F492").schema();
+        this.f4930 = readerSchema.getField("F493").schema();
+        this.f4940 = readerSchema.getField("F494").schema();
+        this.f4950 = readerSchema.getField("F495").schema();
+        this.f4960 = readerSchema.getField("F496").schema();
+        this.f4970 = readerSchema.getField("F497").schema();
+        this.f4980 = readerSchema.getField("F498").schema();
+        this.f4990 = readerSchema.getField("F499").schema();
+        this.f5000 = readerSchema.getField("F500").schema();
+        this.f5010 = readerSchema.getField("F501").schema();
+        this.f5020 = readerSchema.getField("F502").schema();
+        this.f5030 = readerSchema.getField("F503").schema();
+        this.f5040 = readerSchema.getField("F504").schema();
+        this.f5050 = readerSchema.getField("F505").schema();
+        this.f5060 = readerSchema.getField("F506").schema();
+        this.f5070 = readerSchema.getField("F507").schema();
+        this.f5080 = readerSchema.getField("F508").schema();
+        this.f5090 = readerSchema.getField("F509").schema();
+        this.f5100 = readerSchema.getField("F510").schema();
+        this.f5110 = readerSchema.getField("F511").schema();
+        this.f5120 = readerSchema.getField("F512").schema();
+        this.f5130 = readerSchema.getField("F513").schema();
+        this.f5140 = readerSchema.getField("F514").schema();
+        this.f5150 = readerSchema.getField("F515").schema();
+        this.f5160 = readerSchema.getField("F516").schema();
+        this.f5170 = readerSchema.getField("F517").schema();
+        this.f5180 = readerSchema.getField("F518").schema();
+        this.f5190 = readerSchema.getField("F519").schema();
+        this.f5200 = readerSchema.getField("F520").schema();
+        this.f5210 = readerSchema.getField("F521").schema();
+        this.f5220 = readerSchema.getField("F522").schema();
+        this.f5230 = readerSchema.getField("F523").schema();
+        this.f5240 = readerSchema.getField("F524").schema();
+        this.f5250 = readerSchema.getField("F525").schema();
+        this.f5260 = readerSchema.getField("F526").schema();
+        this.f5270 = readerSchema.getField("F527").schema();
+        this.f5280 = readerSchema.getField("F528").schema();
+        this.f5290 = readerSchema.getField("F529").schema();
+        this.f5300 = readerSchema.getField("F530").schema();
+        this.f5310 = readerSchema.getField("F531").schema();
+        this.f5320 = readerSchema.getField("F532").schema();
+        this.f5330 = readerSchema.getField("F533").schema();
+        this.f5340 = readerSchema.getField("F534").schema();
+        this.f5350 = readerSchema.getField("F535").schema();
+        this.f5360 = readerSchema.getField("F536").schema();
+        this.f5370 = readerSchema.getField("F537").schema();
+        this.f5380 = readerSchema.getField("F538").schema();
+        this.f5390 = readerSchema.getField("F539").schema();
+        this.f5400 = readerSchema.getField("F540").schema();
+        this.f5410 = readerSchema.getField("F541").schema();
+        this.f5420 = readerSchema.getField("F542").schema();
+        this.f5430 = readerSchema.getField("F543").schema();
+        this.f5440 = readerSchema.getField("F544").schema();
+        this.f5450 = readerSchema.getField("F545").schema();
+        this.f5460 = readerSchema.getField("F546").schema();
+        this.f5470 = readerSchema.getField("F547").schema();
+        this.f5480 = readerSchema.getField("F548").schema();
+        this.f5490 = readerSchema.getField("F549").schema();
+        this.f5500 = readerSchema.getField("F550").schema();
+        this.f5510 = readerSchema.getField("F551").schema();
+        this.f5520 = readerSchema.getField("F552").schema();
+        this.f5530 = readerSchema.getField("F553").schema();
+        this.f5540 = readerSchema.getField("F554").schema();
+        this.f5550 = readerSchema.getField("F555").schema();
+        this.f5560 = readerSchema.getField("F556").schema();
+        this.f5570 = readerSchema.getField("F557").schema();
+        this.f5580 = readerSchema.getField("F558").schema();
+        this.f5590 = readerSchema.getField("F559").schema();
+        this.f5600 = readerSchema.getField("F560").schema();
+        this.f5610 = readerSchema.getField("F561").schema();
+        this.f5620 = readerSchema.getField("F562").schema();
+        this.f5630 = readerSchema.getField("F563").schema();
+        this.f5640 = readerSchema.getField("F564").schema();
+        this.f5650 = readerSchema.getField("F565").schema();
+        this.f5660 = readerSchema.getField("F566").schema();
+        this.f5670 = readerSchema.getField("F567").schema();
+        this.f5680 = readerSchema.getField("F568").schema();
+        this.f5690 = readerSchema.getField("F569").schema();
+        this.f5700 = readerSchema.getField("F570").schema();
+        this.f5710 = readerSchema.getField("F571").schema();
+        this.f5720 = readerSchema.getField("F572").schema();
+        this.f5730 = readerSchema.getField("F573").schema();
+        this.f5740 = readerSchema.getField("F574").schema();
+        this.f5750 = readerSchema.getField("F575").schema();
+        this.f5760 = readerSchema.getField("F576").schema();
+        this.f5770 = readerSchema.getField("F577").schema();
+        this.f5780 = readerSchema.getField("F578").schema();
+        this.f5790 = readerSchema.getField("F579").schema();
+        this.f5800 = readerSchema.getField("F580").schema();
+        this.f5810 = readerSchema.getField("F581").schema();
+        this.f5820 = readerSchema.getField("F582").schema();
+        this.f5830 = readerSchema.getField("F583").schema();
+        this.f5840 = readerSchema.getField("F584").schema();
+        this.f5850 = readerSchema.getField("F585").schema();
+        this.f5860 = readerSchema.getField("F586").schema();
+        this.f5870 = readerSchema.getField("F587").schema();
+        this.f5880 = readerSchema.getField("F588").schema();
+        this.f5890 = readerSchema.getField("F589").schema();
+        this.f5900 = readerSchema.getField("F590").schema();
+        this.f5910 = readerSchema.getField("F591").schema();
+        this.f5920 = readerSchema.getField("F592").schema();
+        this.f5930 = readerSchema.getField("F593").schema();
+        this.f5940 = readerSchema.getField("F594").schema();
+        this.f5950 = readerSchema.getField("F595").schema();
+        this.f5960 = readerSchema.getField("F596").schema();
+        this.f5970 = readerSchema.getField("F597").schema();
+        this.f5980 = readerSchema.getField("F598").schema();
+        this.f5990 = readerSchema.getField("F599").schema();
+        this.f6000 = readerSchema.getField("F600").schema();
+        this.f6010 = readerSchema.getField("F601").schema();
+        this.f6020 = readerSchema.getField("F602").schema();
+        this.f6030 = readerSchema.getField("F603").schema();
+        this.f6040 = readerSchema.getField("F604").schema();
+        this.f6050 = readerSchema.getField("F605").schema();
+        this.f6060 = readerSchema.getField("F606").schema();
+        this.f6070 = readerSchema.getField("F607").schema();
+        this.f6080 = readerSchema.getField("F608").schema();
+        this.f6090 = readerSchema.getField("F609").schema();
+        this.f6100 = readerSchema.getField("F610").schema();
+        this.f6110 = readerSchema.getField("F611").schema();
+        this.f6120 = readerSchema.getField("F612").schema();
+        this.f6130 = readerSchema.getField("F613").schema();
+        this.f6140 = readerSchema.getField("F614").schema();
+        this.f6150 = readerSchema.getField("F615").schema();
+        this.f6160 = readerSchema.getField("F616").schema();
+        this.f6170 = readerSchema.getField("F617").schema();
+        this.f6180 = readerSchema.getField("F618").schema();
+        this.f6190 = readerSchema.getField("F619").schema();
+        this.f6200 = readerSchema.getField("F620").schema();
+        this.f6210 = readerSchema.getField("F621").schema();
+        this.f6220 = readerSchema.getField("F622").schema();
+        this.f6230 = readerSchema.getField("F623").schema();
+        this.f6240 = readerSchema.getField("F624").schema();
+        this.f6250 = readerSchema.getField("F625").schema();
+        this.f6260 = readerSchema.getField("F626").schema();
+        this.f6270 = readerSchema.getField("F627").schema();
+        this.f6280 = readerSchema.getField("F628").schema();
+        this.f6290 = readerSchema.getField("F629").schema();
+        this.f6300 = readerSchema.getField("F630").schema();
+        this.f6310 = readerSchema.getField("F631").schema();
+        this.f6320 = readerSchema.getField("F632").schema();
+        this.f6330 = readerSchema.getField("F633").schema();
+        this.f6340 = readerSchema.getField("F634").schema();
+        this.f6350 = readerSchema.getField("F635").schema();
+        this.f6360 = readerSchema.getField("F636").schema();
+        this.f6370 = readerSchema.getField("F637").schema();
+        this.f6380 = readerSchema.getField("F638").schema();
+        this.f6390 = readerSchema.getField("F639").schema();
+        this.f6400 = readerSchema.getField("F640").schema();
+        this.f6410 = readerSchema.getField("F641").schema();
+        this.f6420 = readerSchema.getField("F642").schema();
+        this.f6430 = readerSchema.getField("F643").schema();
+        this.f6440 = readerSchema.getField("F644").schema();
+        this.f6450 = readerSchema.getField("F645").schema();
+        this.f6460 = readerSchema.getField("F646").schema();
+        this.f6470 = readerSchema.getField("F647").schema();
+        this.f6480 = readerSchema.getField("F648").schema();
+        this.f6490 = readerSchema.getField("F649").schema();
+        this.f6500 = readerSchema.getField("F650").schema();
+        this.f6510 = readerSchema.getField("F651").schema();
+        this.f6520 = readerSchema.getField("F652").schema();
+        this.f6530 = readerSchema.getField("F653").schema();
+        this.f6540 = readerSchema.getField("F654").schema();
+        this.f6550 = readerSchema.getField("F655").schema();
+        this.f6560 = readerSchema.getField("F656").schema();
+        this.f6570 = readerSchema.getField("F657").schema();
+        this.f6580 = readerSchema.getField("F658").schema();
+        this.f6590 = readerSchema.getField("F659").schema();
+        this.f6600 = readerSchema.getField("F660").schema();
+        this.f6610 = readerSchema.getField("F661").schema();
+        this.f6620 = readerSchema.getField("F662").schema();
+        this.f6630 = readerSchema.getField("F663").schema();
+        this.f6640 = readerSchema.getField("F664").schema();
+        this.f6650 = readerSchema.getField("F665").schema();
+        this.f6660 = readerSchema.getField("F666").schema();
+        this.f6670 = readerSchema.getField("F667").schema();
+        this.f6680 = readerSchema.getField("F668").schema();
+        this.f6690 = readerSchema.getField("F669").schema();
+        this.f6700 = readerSchema.getField("F670").schema();
+        this.f6710 = readerSchema.getField("F671").schema();
+        this.f6720 = readerSchema.getField("F672").schema();
+        this.f6730 = readerSchema.getField("F673").schema();
+        this.f6740 = readerSchema.getField("F674").schema();
+        this.f6750 = readerSchema.getField("F675").schema();
+        this.f6760 = readerSchema.getField("F676").schema();
+        this.f6770 = readerSchema.getField("F677").schema();
+        this.f6780 = readerSchema.getField("F678").schema();
+        this.f6790 = readerSchema.getField("F679").schema();
+        this.f6800 = readerSchema.getField("F680").schema();
+        this.f6810 = readerSchema.getField("F681").schema();
+        this.f6820 = readerSchema.getField("F682").schema();
+        this.f6830 = readerSchema.getField("F683").schema();
+        this.f6840 = readerSchema.getField("F684").schema();
+        this.f6850 = readerSchema.getField("F685").schema();
+        this.f6860 = readerSchema.getField("F686").schema();
+        this.f6870 = readerSchema.getField("F687").schema();
+        this.f6880 = readerSchema.getField("F688").schema();
+        this.f6890 = readerSchema.getField("F689").schema();
+        this.f6900 = readerSchema.getField("F690").schema();
+        this.f6910 = readerSchema.getField("F691").schema();
+        this.f6920 = readerSchema.getField("F692").schema();
+        this.f6930 = readerSchema.getField("F693").schema();
+        this.f6940 = readerSchema.getField("F694").schema();
+        this.f6950 = readerSchema.getField("F695").schema();
+        this.f6960 = readerSchema.getField("F696").schema();
+        this.f6970 = readerSchema.getField("F697").schema();
+        this.f6980 = readerSchema.getField("F698").schema();
+        this.f6990 = readerSchema.getField("F699").schema();
+        this.f7000 = readerSchema.getField("F700").schema();
+        this.f7010 = readerSchema.getField("F701").schema();
+        this.f7020 = readerSchema.getField("F702").schema();
+        this.f7030 = readerSchema.getField("F703").schema();
+        this.f7040 = readerSchema.getField("F704").schema();
+        this.f7050 = readerSchema.getField("F705").schema();
+        this.f7060 = readerSchema.getField("F706").schema();
+        this.f7070 = readerSchema.getField("F707").schema();
+        this.f7080 = readerSchema.getField("F708").schema();
+        this.f7090 = readerSchema.getField("F709").schema();
+        this.f7100 = readerSchema.getField("F710").schema();
+        this.f7110 = readerSchema.getField("F711").schema();
+        this.f7120 = readerSchema.getField("F712").schema();
+        this.f7130 = readerSchema.getField("F713").schema();
+        this.f7140 = readerSchema.getField("F714").schema();
+        this.f7150 = readerSchema.getField("F715").schema();
+        this.f7160 = readerSchema.getField("F716").schema();
+        this.f7170 = readerSchema.getField("F717").schema();
+        this.f7180 = readerSchema.getField("F718").schema();
+        this.f7190 = readerSchema.getField("F719").schema();
+        this.f7200 = readerSchema.getField("F720").schema();
+        this.f7210 = readerSchema.getField("F721").schema();
+        this.f7220 = readerSchema.getField("F722").schema();
+        this.f7230 = readerSchema.getField("F723").schema();
+        this.f7240 = readerSchema.getField("F724").schema();
+        this.f7250 = readerSchema.getField("F725").schema();
+        this.f7260 = readerSchema.getField("F726").schema();
+        this.f7270 = readerSchema.getField("F727").schema();
+        this.f7280 = readerSchema.getField("F728").schema();
+        this.f7290 = readerSchema.getField("F729").schema();
+        this.f7300 = readerSchema.getField("F730").schema();
+        this.f7310 = readerSchema.getField("F731").schema();
+        this.f7320 = readerSchema.getField("F732").schema();
+        this.f7330 = readerSchema.getField("F733").schema();
+        this.f7340 = readerSchema.getField("F734").schema();
+        this.f7350 = readerSchema.getField("F735").schema();
+        this.f7360 = readerSchema.getField("F736").schema();
+        this.f7370 = readerSchema.getField("F737").schema();
+        this.f7380 = readerSchema.getField("F738").schema();
+        this.f7390 = readerSchema.getField("F739").schema();
+        this.f7400 = readerSchema.getField("F740").schema();
+        this.f7410 = readerSchema.getField("F741").schema();
+        this.f7420 = readerSchema.getField("F742").schema();
+        this.f7430 = readerSchema.getField("F743").schema();
+        this.f7440 = readerSchema.getField("F744").schema();
+        this.f7450 = readerSchema.getField("F745").schema();
+        this.f7460 = readerSchema.getField("F746").schema();
+        this.f7470 = readerSchema.getField("F747").schema();
+        this.f7480 = readerSchema.getField("F748").schema();
+        this.f7490 = readerSchema.getField("F749").schema();
+        this.f7500 = readerSchema.getField("F750").schema();
+        this.f7510 = readerSchema.getField("F751").schema();
+        this.f7520 = readerSchema.getField("F752").schema();
+        this.f7530 = readerSchema.getField("F753").schema();
+        this.f7540 = readerSchema.getField("F754").schema();
+        this.f7550 = readerSchema.getField("F755").schema();
+        this.f7560 = readerSchema.getField("F756").schema();
+        this.f7570 = readerSchema.getField("F757").schema();
+        this.f7580 = readerSchema.getField("F758").schema();
+        this.f7590 = readerSchema.getField("F759").schema();
+        this.f7600 = readerSchema.getField("F760").schema();
+        this.f7610 = readerSchema.getField("F761").schema();
+        this.f7620 = readerSchema.getField("F762").schema();
+        this.f7630 = readerSchema.getField("F763").schema();
+        this.f7640 = readerSchema.getField("F764").schema();
+        this.f7650 = readerSchema.getField("F765").schema();
+        this.f7660 = readerSchema.getField("F766").schema();
+        this.f7670 = readerSchema.getField("F767").schema();
+        this.f7680 = readerSchema.getField("F768").schema();
+        this.f7690 = readerSchema.getField("F769").schema();
+        this.f7700 = readerSchema.getField("F770").schema();
+        this.f7710 = readerSchema.getField("F771").schema();
+        this.f7720 = readerSchema.getField("F772").schema();
+        this.f7730 = readerSchema.getField("F773").schema();
+        this.f7740 = readerSchema.getField("F774").schema();
+        this.f7750 = readerSchema.getField("F775").schema();
+        this.f7760 = readerSchema.getField("F776").schema();
+        this.f7770 = readerSchema.getField("F777").schema();
+        this.f7780 = readerSchema.getField("F778").schema();
+        this.f7790 = readerSchema.getField("F779").schema();
+        this.f7800 = readerSchema.getField("F780").schema();
+        this.f7810 = readerSchema.getField("F781").schema();
+        this.f7820 = readerSchema.getField("F782").schema();
+        this.f7830 = readerSchema.getField("F783").schema();
+        this.f7840 = readerSchema.getField("F784").schema();
+        this.f7850 = readerSchema.getField("F785").schema();
+        this.f7860 = readerSchema.getField("F786").schema();
+        this.f7870 = readerSchema.getField("F787").schema();
+        this.f7880 = readerSchema.getField("F788").schema();
+        this.f7890 = readerSchema.getField("F789").schema();
+        this.f7900 = readerSchema.getField("F790").schema();
+        this.f7910 = readerSchema.getField("F791").schema();
+        this.f7920 = readerSchema.getField("F792").schema();
+        this.f7930 = readerSchema.getField("F793").schema();
+        this.f7940 = readerSchema.getField("F794").schema();
+        this.f7950 = readerSchema.getField("F795").schema();
+        this.f7960 = readerSchema.getField("F796").schema();
+        this.f7970 = readerSchema.getField("F797").schema();
+        this.f7980 = readerSchema.getField("F798").schema();
+        this.f7990 = readerSchema.getField("F799").schema();
+        this.f8000 = readerSchema.getField("F800").schema();
+        this.f8010 = readerSchema.getField("F801").schema();
+        this.f8020 = readerSchema.getField("F802").schema();
+        this.f8030 = readerSchema.getField("F803").schema();
+        this.f8040 = readerSchema.getField("F804").schema();
+        this.f8050 = readerSchema.getField("F805").schema();
+        this.f8060 = readerSchema.getField("F806").schema();
+        this.f8070 = readerSchema.getField("F807").schema();
+        this.f8080 = readerSchema.getField("F808").schema();
+        this.f8090 = readerSchema.getField("F809").schema();
+        this.f8100 = readerSchema.getField("F810").schema();
+        this.f8110 = readerSchema.getField("F811").schema();
+        this.f8120 = readerSchema.getField("F812").schema();
+        this.f8130 = readerSchema.getField("F813").schema();
+        this.f8140 = readerSchema.getField("F814").schema();
+        this.f8150 = readerSchema.getField("F815").schema();
+        this.f8160 = readerSchema.getField("F816").schema();
+        this.f8170 = readerSchema.getField("F817").schema();
+        this.f8180 = readerSchema.getField("F818").schema();
+        this.f8190 = readerSchema.getField("F819").schema();
+        this.f8200 = readerSchema.getField("F820").schema();
+        this.f8210 = readerSchema.getField("F821").schema();
+        this.f8220 = readerSchema.getField("F822").schema();
+        this.f8230 = readerSchema.getField("F823").schema();
+        this.f8240 = readerSchema.getField("F824").schema();
+        this.f8250 = readerSchema.getField("F825").schema();
+        this.f8260 = readerSchema.getField("F826").schema();
+        this.f8270 = readerSchema.getField("F827").schema();
+        this.f8280 = readerSchema.getField("F828").schema();
+        this.f8290 = readerSchema.getField("F829").schema();
+        this.f8300 = readerSchema.getField("F830").schema();
+        this.f8310 = readerSchema.getField("F831").schema();
+        this.f8320 = readerSchema.getField("F832").schema();
+        this.f8330 = readerSchema.getField("F833").schema();
+        this.f8340 = readerSchema.getField("F834").schema();
+        this.f8350 = readerSchema.getField("F835").schema();
+        this.f8360 = readerSchema.getField("F836").schema();
+        this.f8370 = readerSchema.getField("F837").schema();
+        this.f8380 = readerSchema.getField("F838").schema();
+        this.f8390 = readerSchema.getField("F839").schema();
+        this.f8400 = readerSchema.getField("F840").schema();
+        this.f8410 = readerSchema.getField("F841").schema();
+        this.f8420 = readerSchema.getField("F842").schema();
+        this.f8430 = readerSchema.getField("F843").schema();
+        this.f8440 = readerSchema.getField("F844").schema();
+        this.f8450 = readerSchema.getField("F845").schema();
+        this.f8460 = readerSchema.getField("F846").schema();
+        this.f8470 = readerSchema.getField("F847").schema();
+        this.f8480 = readerSchema.getField("F848").schema();
+        this.f8490 = readerSchema.getField("F849").schema();
+        this.f8500 = readerSchema.getField("F850").schema();
+        this.f8510 = readerSchema.getField("F851").schema();
+        this.f8520 = readerSchema.getField("F852").schema();
+        this.f8530 = readerSchema.getField("F853").schema();
+        this.f8540 = readerSchema.getField("F854").schema();
+        this.f8550 = readerSchema.getField("F855").schema();
+        this.f8560 = readerSchema.getField("F856").schema();
+        this.f8570 = readerSchema.getField("F857").schema();
+        this.f8580 = readerSchema.getField("F858").schema();
+        this.f8590 = readerSchema.getField("F859").schema();
+        this.f8600 = readerSchema.getField("F860").schema();
+        this.f8610 = readerSchema.getField("F861").schema();
+        this.f8620 = readerSchema.getField("F862").schema();
+        this.f8630 = readerSchema.getField("F863").schema();
+        this.f8640 = readerSchema.getField("F864").schema();
+        this.f8650 = readerSchema.getField("F865").schema();
+        this.f8660 = readerSchema.getField("F866").schema();
+        this.f8670 = readerSchema.getField("F867").schema();
+        this.f8680 = readerSchema.getField("F868").schema();
+        this.f8690 = readerSchema.getField("F869").schema();
+        this.f8700 = readerSchema.getField("F870").schema();
+        this.f8710 = readerSchema.getField("F871").schema();
+        this.f8720 = readerSchema.getField("F872").schema();
+        this.f8730 = readerSchema.getField("F873").schema();
+        this.f8740 = readerSchema.getField("F874").schema();
+        this.f8750 = readerSchema.getField("F875").schema();
+        this.f8760 = readerSchema.getField("F876").schema();
+        this.f8770 = readerSchema.getField("F877").schema();
+        this.f8780 = readerSchema.getField("F878").schema();
+        this.f8790 = readerSchema.getField("F879").schema();
+        this.f8800 = readerSchema.getField("F880").schema();
+        this.f8810 = readerSchema.getField("F881").schema();
+        this.f8820 = readerSchema.getField("F882").schema();
+        this.f8830 = readerSchema.getField("F883").schema();
+        this.f8840 = readerSchema.getField("F884").schema();
+        this.f8850 = readerSchema.getField("F885").schema();
+        this.f8860 = readerSchema.getField("F886").schema();
+        this.f8870 = readerSchema.getField("F887").schema();
+        this.f8880 = readerSchema.getField("F888").schema();
+        this.f8890 = readerSchema.getField("F889").schema();
+        this.f8900 = readerSchema.getField("F890").schema();
+        this.f8910 = readerSchema.getField("F891").schema();
+        this.f8920 = readerSchema.getField("F892").schema();
+        this.f8930 = readerSchema.getField("F893").schema();
+        this.f8940 = readerSchema.getField("F894").schema();
+        this.f8950 = readerSchema.getField("F895").schema();
+        this.f8960 = readerSchema.getField("F896").schema();
+        this.f8970 = readerSchema.getField("F897").schema();
+        this.f8980 = readerSchema.getField("F898").schema();
+        this.f8990 = readerSchema.getField("F899").schema();
+        this.f9000 = readerSchema.getField("F900").schema();
+        this.f9010 = readerSchema.getField("F901").schema();
+        this.f9020 = readerSchema.getField("F902").schema();
+        this.f9030 = readerSchema.getField("F903").schema();
+        this.f9040 = readerSchema.getField("F904").schema();
+        this.f9050 = readerSchema.getField("F905").schema();
+        this.f9060 = readerSchema.getField("F906").schema();
+        this.f9070 = readerSchema.getField("F907").schema();
+        this.f9080 = readerSchema.getField("F908").schema();
+        this.f9090 = readerSchema.getField("F909").schema();
+        this.f9100 = readerSchema.getField("F910").schema();
+        this.f9110 = readerSchema.getField("F911").schema();
+        this.f9120 = readerSchema.getField("F912").schema();
+        this.f9130 = readerSchema.getField("F913").schema();
+        this.f9140 = readerSchema.getField("F914").schema();
+        this.f9150 = readerSchema.getField("F915").schema();
+        this.f9160 = readerSchema.getField("F916").schema();
+        this.f9170 = readerSchema.getField("F917").schema();
+        this.f9180 = readerSchema.getField("F918").schema();
+        this.f9190 = readerSchema.getField("F919").schema();
+        this.f9200 = readerSchema.getField("F920").schema();
+        this.f9210 = readerSchema.getField("F921").schema();
+        this.f9220 = readerSchema.getField("F922").schema();
+        this.f9230 = readerSchema.getField("F923").schema();
+        this.f9240 = readerSchema.getField("F924").schema();
+        this.f9250 = readerSchema.getField("F925").schema();
+        this.f9260 = readerSchema.getField("F926").schema();
+        this.f9270 = readerSchema.getField("F927").schema();
+        this.f9280 = readerSchema.getField("F928").schema();
+        this.f9290 = readerSchema.getField("F929").schema();
+        this.f9300 = readerSchema.getField("F930").schema();
+        this.f9310 = readerSchema.getField("F931").schema();
+        this.f9320 = readerSchema.getField("F932").schema();
+        this.f9330 = readerSchema.getField("F933").schema();
+        this.f9340 = readerSchema.getField("F934").schema();
+        this.f9350 = readerSchema.getField("F935").schema();
+        this.f9360 = readerSchema.getField("F936").schema();
+        this.f9370 = readerSchema.getField("F937").schema();
+        this.f9380 = readerSchema.getField("F938").schema();
+        this.f9390 = readerSchema.getField("F939").schema();
+        this.f9400 = readerSchema.getField("F940").schema();
+        this.f9410 = readerSchema.getField("F941").schema();
+        this.f9420 = readerSchema.getField("F942").schema();
+        this.f9430 = readerSchema.getField("F943").schema();
+        this.f9440 = readerSchema.getField("F944").schema();
+        this.f9450 = readerSchema.getField("F945").schema();
+        this.f9460 = readerSchema.getField("F946").schema();
+        this.f9470 = readerSchema.getField("F947").schema();
+        this.f9480 = readerSchema.getField("F948").schema();
+        this.f9490 = readerSchema.getField("F949").schema();
+        this.f9500 = readerSchema.getField("F950").schema();
+        this.f9510 = readerSchema.getField("F951").schema();
+        this.f9520 = readerSchema.getField("F952").schema();
+        this.f9530 = readerSchema.getField("F953").schema();
+        this.f9540 = readerSchema.getField("F954").schema();
+        this.f9550 = readerSchema.getField("F955").schema();
+        this.f9560 = readerSchema.getField("F956").schema();
+        this.f9570 = readerSchema.getField("F957").schema();
+        this.f9580 = readerSchema.getField("F958").schema();
+        this.f9590 = readerSchema.getField("F959").schema();
+        this.f9600 = readerSchema.getField("F960").schema();
+        this.f9610 = readerSchema.getField("F961").schema();
+        this.f9620 = readerSchema.getField("F962").schema();
+        this.f9630 = readerSchema.getField("F963").schema();
+        this.f9640 = readerSchema.getField("F964").schema();
+        this.f9650 = readerSchema.getField("F965").schema();
+        this.f9660 = readerSchema.getField("F966").schema();
+        this.f9670 = readerSchema.getField("F967").schema();
+        this.f9680 = readerSchema.getField("F968").schema();
+        this.f9690 = readerSchema.getField("F969").schema();
+        this.f9700 = readerSchema.getField("F970").schema();
+        this.f9710 = readerSchema.getField("F971").schema();
+        this.f9720 = readerSchema.getField("F972").schema();
+        this.f9730 = readerSchema.getField("F973").schema();
+        this.f9740 = readerSchema.getField("F974").schema();
+        this.f9750 = readerSchema.getField("F975").schema();
+        this.f9760 = readerSchema.getField("F976").schema();
+        this.f9770 = readerSchema.getField("F977").schema();
+        this.f9780 = readerSchema.getField("F978").schema();
+        this.f9790 = readerSchema.getField("F979").schema();
+        this.f9800 = readerSchema.getField("F980").schema();
+        this.f9810 = readerSchema.getField("F981").schema();
+        this.f9820 = readerSchema.getField("F982").schema();
+        this.f9830 = readerSchema.getField("F983").schema();
+        this.f9840 = readerSchema.getField("F984").schema();
+        this.f9850 = readerSchema.getField("F985").schema();
+        this.f9860 = readerSchema.getField("F986").schema();
+        this.f9870 = readerSchema.getField("F987").schema();
+        this.f9880 = readerSchema.getField("F988").schema();
+        this.f9890 = readerSchema.getField("F989").schema();
+        this.f9900 = readerSchema.getField("F990").schema();
+        this.f9910 = readerSchema.getField("F991").schema();
+        this.f9920 = readerSchema.getField("F992").schema();
+        this.f9930 = readerSchema.getField("F993").schema();
+        this.f9940 = readerSchema.getField("F994").schema();
+        this.f9950 = readerSchema.getField("F995").schema();
+        this.f9960 = readerSchema.getField("F996").schema();
+        this.f9970 = readerSchema.getField("F997").schema();
+        this.f9980 = readerSchema.getField("F998").schema();
+        this.f9990 = readerSchema.getField("F999").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F0': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499((FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F1': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(2);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(2, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(3);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(3, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F3': "+ unionIndex3));
+            }
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence4;
+                Object oldString4 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(4);
+                if (oldString4 instanceof Utf8) {
+                    charSequence4 = (decoder).readString(((Utf8) oldString4));
+                } else {
+                    charSequence4 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(4, charSequence4);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F4': "+ unionIndex4));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Utf8 charSequence5;
+                Object oldString5 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(5);
+                if (oldString5 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) oldString5));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(5, charSequence5);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F5': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence6;
+                Object oldString6 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(6);
+                if (oldString6 instanceof Utf8) {
+                    charSequence6 = (decoder).readString(((Utf8) oldString6));
+                } else {
+                    charSequence6 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(6, charSequence6);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F6': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence7;
+                Object oldString7 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(7);
+                if (oldString7 instanceof Utf8) {
+                    charSequence7 = (decoder).readString(((Utf8) oldString7));
+                } else {
+                    charSequence7 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(7, charSequence7);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F7': "+ unionIndex7));
+            }
+        }
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, null);
+        } else {
+            if (unionIndex8 == 1) {
+                Utf8 charSequence8;
+                Object oldString8 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(8);
+                if (oldString8 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString8));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(8, charSequence8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F8': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, null);
+        } else {
+            if (unionIndex9 == 1) {
+                Utf8 charSequence9;
+                Object oldString9 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(9);
+                if (oldString9 instanceof Utf8) {
+                    charSequence9 = (decoder).readString(((Utf8) oldString9));
+                } else {
+                    charSequence9 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F9': "+ unionIndex9));
+            }
+        }
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, null);
+        } else {
+            if (unionIndex10 == 1) {
+                Utf8 charSequence10;
+                Object oldString10 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(10);
+                if (oldString10 instanceof Utf8) {
+                    charSequence10 = (decoder).readString(((Utf8) oldString10));
+                } else {
+                    charSequence10 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(10, charSequence10);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F10': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, null);
+        } else {
+            if (unionIndex11 == 1) {
+                Utf8 charSequence11;
+                Object oldString11 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(11);
+                if (oldString11 instanceof Utf8) {
+                    charSequence11 = (decoder).readString(((Utf8) oldString11));
+                } else {
+                    charSequence11 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(11, charSequence11);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F11': "+ unionIndex11));
+            }
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence12;
+                Object oldString12 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(12);
+                if (oldString12 instanceof Utf8) {
+                    charSequence12 = (decoder).readString(((Utf8) oldString12));
+                } else {
+                    charSequence12 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(12, charSequence12);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F12': "+ unionIndex12));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence13;
+                Object oldString13 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(13);
+                if (oldString13 instanceof Utf8) {
+                    charSequence13 = (decoder).readString(((Utf8) oldString13));
+                } else {
+                    charSequence13 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(13, charSequence13);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F13': "+ unionIndex13));
+            }
+        }
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence14;
+                Object oldString14 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(14);
+                if (oldString14 instanceof Utf8) {
+                    charSequence14 = (decoder).readString(((Utf8) oldString14));
+                } else {
+                    charSequence14 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(14, charSequence14);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F14': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema7(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence15;
+                Object oldString15 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(15);
+                if (oldString15 instanceof Utf8) {
+                    charSequence15 = (decoder).readString(((Utf8) oldString15));
+                } else {
+                    charSequence15 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(15, charSequence15);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F15': "+ unionIndex15));
+            }
+        }
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Utf8 charSequence16;
+                Object oldString16 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(16);
+                if (oldString16 instanceof Utf8) {
+                    charSequence16 = (decoder).readString(((Utf8) oldString16));
+                } else {
+                    charSequence16 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(16, charSequence16);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F16': "+ unionIndex16));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema8(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Utf8 charSequence17;
+                Object oldString17 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(17);
+                if (oldString17 instanceof Utf8) {
+                    charSequence17 = (decoder).readString(((Utf8) oldString17));
+                } else {
+                    charSequence17 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(17, charSequence17);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F17': "+ unionIndex17));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Utf8 charSequence18;
+                Object oldString18 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(18);
+                if (oldString18 instanceof Utf8) {
+                    charSequence18 = (decoder).readString(((Utf8) oldString18));
+                } else {
+                    charSequence18 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(18, charSequence18);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F18': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema9(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex19 = (decoder.readIndex());
+        if (unionIndex19 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, null);
+        } else {
+            if (unionIndex19 == 1) {
+                Utf8 charSequence19;
+                Object oldString19 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(19);
+                if (oldString19 instanceof Utf8) {
+                    charSequence19 = (decoder).readString(((Utf8) oldString19));
+                } else {
+                    charSequence19 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(19, charSequence19);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F19': "+ unionIndex19));
+            }
+        }
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, null);
+        } else {
+            if (unionIndex20 == 1) {
+                Utf8 charSequence20;
+                Object oldString20 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(20);
+                if (oldString20 instanceof Utf8) {
+                    charSequence20 = (decoder).readString(((Utf8) oldString20));
+                } else {
+                    charSequence20 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(20, charSequence20);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F20': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema10(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, null);
+        } else {
+            if (unionIndex21 == 1) {
+                Utf8 charSequence21;
+                Object oldString21 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(21);
+                if (oldString21 instanceof Utf8) {
+                    charSequence21 = (decoder).readString(((Utf8) oldString21));
+                } else {
+                    charSequence21 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(21, charSequence21);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F21': "+ unionIndex21));
+            }
+        }
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Utf8 charSequence22;
+                Object oldString22 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(22);
+                if (oldString22 instanceof Utf8) {
+                    charSequence22 = (decoder).readString(((Utf8) oldString22));
+                } else {
+                    charSequence22 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(22, charSequence22);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F22': "+ unionIndex22));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema11(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Utf8 charSequence23;
+                Object oldString23 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(23);
+                if (oldString23 instanceof Utf8) {
+                    charSequence23 = (decoder).readString(((Utf8) oldString23));
+                } else {
+                    charSequence23 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(23, charSequence23);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F23': "+ unionIndex23));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Utf8 charSequence24;
+                Object oldString24 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(24);
+                if (oldString24 instanceof Utf8) {
+                    charSequence24 = (decoder).readString(((Utf8) oldString24));
+                } else {
+                    charSequence24 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(24, charSequence24);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F24': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema12(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, null);
+        } else {
+            if (unionIndex25 == 1) {
+                Utf8 charSequence25;
+                Object oldString25 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(25);
+                if (oldString25 instanceof Utf8) {
+                    charSequence25 = (decoder).readString(((Utf8) oldString25));
+                } else {
+                    charSequence25 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(25, charSequence25);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F25': "+ unionIndex25));
+            }
+        }
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, null);
+        } else {
+            if (unionIndex26 == 1) {
+                Utf8 charSequence26;
+                Object oldString26 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(26);
+                if (oldString26 instanceof Utf8) {
+                    charSequence26 = (decoder).readString(((Utf8) oldString26));
+                } else {
+                    charSequence26 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(26, charSequence26);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F26': "+ unionIndex26));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema13(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex27 = (decoder.readIndex());
+        if (unionIndex27 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, null);
+        } else {
+            if (unionIndex27 == 1) {
+                Utf8 charSequence27;
+                Object oldString27 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(27);
+                if (oldString27 instanceof Utf8) {
+                    charSequence27 = (decoder).readString(((Utf8) oldString27));
+                } else {
+                    charSequence27 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(27, charSequence27);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F27': "+ unionIndex27));
+            }
+        }
+        int unionIndex28 = (decoder.readIndex());
+        if (unionIndex28 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, null);
+        } else {
+            if (unionIndex28 == 1) {
+                Utf8 charSequence28;
+                Object oldString28 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(28);
+                if (oldString28 instanceof Utf8) {
+                    charSequence28 = (decoder).readString(((Utf8) oldString28));
+                } else {
+                    charSequence28 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(28, charSequence28);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F28': "+ unionIndex28));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema14(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex29 = (decoder.readIndex());
+        if (unionIndex29 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, null);
+        } else {
+            if (unionIndex29 == 1) {
+                Utf8 charSequence29;
+                Object oldString29 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(29);
+                if (oldString29 instanceof Utf8) {
+                    charSequence29 = (decoder).readString(((Utf8) oldString29));
+                } else {
+                    charSequence29 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(29, charSequence29);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F29': "+ unionIndex29));
+            }
+        }
+        int unionIndex30 = (decoder.readIndex());
+        if (unionIndex30 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, null);
+        } else {
+            if (unionIndex30 == 1) {
+                Utf8 charSequence30;
+                Object oldString30 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(30);
+                if (oldString30 instanceof Utf8) {
+                    charSequence30 = (decoder).readString(((Utf8) oldString30));
+                } else {
+                    charSequence30 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(30, charSequence30);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F30': "+ unionIndex30));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema15(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex31 = (decoder.readIndex());
+        if (unionIndex31 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, null);
+        } else {
+            if (unionIndex31 == 1) {
+                Utf8 charSequence31;
+                Object oldString31 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(31);
+                if (oldString31 instanceof Utf8) {
+                    charSequence31 = (decoder).readString(((Utf8) oldString31));
+                } else {
+                    charSequence31 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(31, charSequence31);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F31': "+ unionIndex31));
+            }
+        }
+        int unionIndex32 = (decoder.readIndex());
+        if (unionIndex32 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, null);
+        } else {
+            if (unionIndex32 == 1) {
+                Utf8 charSequence32;
+                Object oldString32 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(32);
+                if (oldString32 instanceof Utf8) {
+                    charSequence32 = (decoder).readString(((Utf8) oldString32));
+                } else {
+                    charSequence32 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(32, charSequence32);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F32': "+ unionIndex32));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema16(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex33 = (decoder.readIndex());
+        if (unionIndex33 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, null);
+        } else {
+            if (unionIndex33 == 1) {
+                Utf8 charSequence33;
+                Object oldString33 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(33);
+                if (oldString33 instanceof Utf8) {
+                    charSequence33 = (decoder).readString(((Utf8) oldString33));
+                } else {
+                    charSequence33 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(33, charSequence33);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F33': "+ unionIndex33));
+            }
+        }
+        int unionIndex34 = (decoder.readIndex());
+        if (unionIndex34 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, null);
+        } else {
+            if (unionIndex34 == 1) {
+                Utf8 charSequence34;
+                Object oldString34 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(34);
+                if (oldString34 instanceof Utf8) {
+                    charSequence34 = (decoder).readString(((Utf8) oldString34));
+                } else {
+                    charSequence34 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(34, charSequence34);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F34': "+ unionIndex34));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema17(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex35 = (decoder.readIndex());
+        if (unionIndex35 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, null);
+        } else {
+            if (unionIndex35 == 1) {
+                Utf8 charSequence35;
+                Object oldString35 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(35);
+                if (oldString35 instanceof Utf8) {
+                    charSequence35 = (decoder).readString(((Utf8) oldString35));
+                } else {
+                    charSequence35 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(35, charSequence35);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F35': "+ unionIndex35));
+            }
+        }
+        int unionIndex36 = (decoder.readIndex());
+        if (unionIndex36 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, null);
+        } else {
+            if (unionIndex36 == 1) {
+                Utf8 charSequence36;
+                Object oldString36 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(36);
+                if (oldString36 instanceof Utf8) {
+                    charSequence36 = (decoder).readString(((Utf8) oldString36));
+                } else {
+                    charSequence36 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(36, charSequence36);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F36': "+ unionIndex36));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema18(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex37 = (decoder.readIndex());
+        if (unionIndex37 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, null);
+        } else {
+            if (unionIndex37 == 1) {
+                Utf8 charSequence37;
+                Object oldString37 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(37);
+                if (oldString37 instanceof Utf8) {
+                    charSequence37 = (decoder).readString(((Utf8) oldString37));
+                } else {
+                    charSequence37 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(37, charSequence37);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F37': "+ unionIndex37));
+            }
+        }
+        int unionIndex38 = (decoder.readIndex());
+        if (unionIndex38 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, null);
+        } else {
+            if (unionIndex38 == 1) {
+                Utf8 charSequence38;
+                Object oldString38 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(38);
+                if (oldString38 instanceof Utf8) {
+                    charSequence38 = (decoder).readString(((Utf8) oldString38));
+                } else {
+                    charSequence38 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(38, charSequence38);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F38': "+ unionIndex38));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema19(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex39 = (decoder.readIndex());
+        if (unionIndex39 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, null);
+        } else {
+            if (unionIndex39 == 1) {
+                Utf8 charSequence39;
+                Object oldString39 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(39);
+                if (oldString39 instanceof Utf8) {
+                    charSequence39 = (decoder).readString(((Utf8) oldString39));
+                } else {
+                    charSequence39 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(39, charSequence39);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F39': "+ unionIndex39));
+            }
+        }
+        int unionIndex40 = (decoder.readIndex());
+        if (unionIndex40 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, null);
+        } else {
+            if (unionIndex40 == 1) {
+                Utf8 charSequence40;
+                Object oldString40 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(40);
+                if (oldString40 instanceof Utf8) {
+                    charSequence40 = (decoder).readString(((Utf8) oldString40));
+                } else {
+                    charSequence40 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(40, charSequence40);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F40': "+ unionIndex40));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema20(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex41 = (decoder.readIndex());
+        if (unionIndex41 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, null);
+        } else {
+            if (unionIndex41 == 1) {
+                Utf8 charSequence41;
+                Object oldString41 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(41);
+                if (oldString41 instanceof Utf8) {
+                    charSequence41 = (decoder).readString(((Utf8) oldString41));
+                } else {
+                    charSequence41 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(41, charSequence41);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F41': "+ unionIndex41));
+            }
+        }
+        int unionIndex42 = (decoder.readIndex());
+        if (unionIndex42 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, null);
+        } else {
+            if (unionIndex42 == 1) {
+                Utf8 charSequence42;
+                Object oldString42 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(42);
+                if (oldString42 instanceof Utf8) {
+                    charSequence42 = (decoder).readString(((Utf8) oldString42));
+                } else {
+                    charSequence42 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(42, charSequence42);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F42': "+ unionIndex42));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema21(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex43 = (decoder.readIndex());
+        if (unionIndex43 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, null);
+        } else {
+            if (unionIndex43 == 1) {
+                Utf8 charSequence43;
+                Object oldString43 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(43);
+                if (oldString43 instanceof Utf8) {
+                    charSequence43 = (decoder).readString(((Utf8) oldString43));
+                } else {
+                    charSequence43 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(43, charSequence43);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F43': "+ unionIndex43));
+            }
+        }
+        int unionIndex44 = (decoder.readIndex());
+        if (unionIndex44 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, null);
+        } else {
+            if (unionIndex44 == 1) {
+                Utf8 charSequence44;
+                Object oldString44 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(44);
+                if (oldString44 instanceof Utf8) {
+                    charSequence44 = (decoder).readString(((Utf8) oldString44));
+                } else {
+                    charSequence44 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(44, charSequence44);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F44': "+ unionIndex44));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema22(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex45 = (decoder.readIndex());
+        if (unionIndex45 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, null);
+        } else {
+            if (unionIndex45 == 1) {
+                Utf8 charSequence45;
+                Object oldString45 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(45);
+                if (oldString45 instanceof Utf8) {
+                    charSequence45 = (decoder).readString(((Utf8) oldString45));
+                } else {
+                    charSequence45 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(45, charSequence45);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F45': "+ unionIndex45));
+            }
+        }
+        int unionIndex46 = (decoder.readIndex());
+        if (unionIndex46 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, null);
+        } else {
+            if (unionIndex46 == 1) {
+                Utf8 charSequence46;
+                Object oldString46 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(46);
+                if (oldString46 instanceof Utf8) {
+                    charSequence46 = (decoder).readString(((Utf8) oldString46));
+                } else {
+                    charSequence46 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(46, charSequence46);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F46': "+ unionIndex46));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema23(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex47 = (decoder.readIndex());
+        if (unionIndex47 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, null);
+        } else {
+            if (unionIndex47 == 1) {
+                Utf8 charSequence47;
+                Object oldString47 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(47);
+                if (oldString47 instanceof Utf8) {
+                    charSequence47 = (decoder).readString(((Utf8) oldString47));
+                } else {
+                    charSequence47 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(47, charSequence47);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F47': "+ unionIndex47));
+            }
+        }
+        int unionIndex48 = (decoder.readIndex());
+        if (unionIndex48 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, null);
+        } else {
+            if (unionIndex48 == 1) {
+                Utf8 charSequence48;
+                Object oldString48 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(48);
+                if (oldString48 instanceof Utf8) {
+                    charSequence48 = (decoder).readString(((Utf8) oldString48));
+                } else {
+                    charSequence48 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(48, charSequence48);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F48': "+ unionIndex48));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema24(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex49 = (decoder.readIndex());
+        if (unionIndex49 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, null);
+        } else {
+            if (unionIndex49 == 1) {
+                Utf8 charSequence49;
+                Object oldString49 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(49);
+                if (oldString49 instanceof Utf8) {
+                    charSequence49 = (decoder).readString(((Utf8) oldString49));
+                } else {
+                    charSequence49 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(49, charSequence49);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F49': "+ unionIndex49));
+            }
+        }
+        int unionIndex50 = (decoder.readIndex());
+        if (unionIndex50 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, null);
+        } else {
+            if (unionIndex50 == 1) {
+                Utf8 charSequence50;
+                Object oldString50 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(50);
+                if (oldString50 instanceof Utf8) {
+                    charSequence50 = (decoder).readString(((Utf8) oldString50));
+                } else {
+                    charSequence50 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(50, charSequence50);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F50': "+ unionIndex50));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema25(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex51 = (decoder.readIndex());
+        if (unionIndex51 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, null);
+        } else {
+            if (unionIndex51 == 1) {
+                Utf8 charSequence51;
+                Object oldString51 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(51);
+                if (oldString51 instanceof Utf8) {
+                    charSequence51 = (decoder).readString(((Utf8) oldString51));
+                } else {
+                    charSequence51 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(51, charSequence51);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F51': "+ unionIndex51));
+            }
+        }
+        int unionIndex52 = (decoder.readIndex());
+        if (unionIndex52 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, null);
+        } else {
+            if (unionIndex52 == 1) {
+                Utf8 charSequence52;
+                Object oldString52 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(52);
+                if (oldString52 instanceof Utf8) {
+                    charSequence52 = (decoder).readString(((Utf8) oldString52));
+                } else {
+                    charSequence52 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(52, charSequence52);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F52': "+ unionIndex52));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema26(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex53 = (decoder.readIndex());
+        if (unionIndex53 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, null);
+        } else {
+            if (unionIndex53 == 1) {
+                Utf8 charSequence53;
+                Object oldString53 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(53);
+                if (oldString53 instanceof Utf8) {
+                    charSequence53 = (decoder).readString(((Utf8) oldString53));
+                } else {
+                    charSequence53 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(53, charSequence53);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F53': "+ unionIndex53));
+            }
+        }
+        int unionIndex54 = (decoder.readIndex());
+        if (unionIndex54 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, null);
+        } else {
+            if (unionIndex54 == 1) {
+                Utf8 charSequence54;
+                Object oldString54 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(54);
+                if (oldString54 instanceof Utf8) {
+                    charSequence54 = (decoder).readString(((Utf8) oldString54));
+                } else {
+                    charSequence54 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(54, charSequence54);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F54': "+ unionIndex54));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema27(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex55 = (decoder.readIndex());
+        if (unionIndex55 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, null);
+        } else {
+            if (unionIndex55 == 1) {
+                Utf8 charSequence55;
+                Object oldString55 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(55);
+                if (oldString55 instanceof Utf8) {
+                    charSequence55 = (decoder).readString(((Utf8) oldString55));
+                } else {
+                    charSequence55 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(55, charSequence55);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F55': "+ unionIndex55));
+            }
+        }
+        int unionIndex56 = (decoder.readIndex());
+        if (unionIndex56 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, null);
+        } else {
+            if (unionIndex56 == 1) {
+                Utf8 charSequence56;
+                Object oldString56 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(56);
+                if (oldString56 instanceof Utf8) {
+                    charSequence56 = (decoder).readString(((Utf8) oldString56));
+                } else {
+                    charSequence56 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(56, charSequence56);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F56': "+ unionIndex56));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema28(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex57 = (decoder.readIndex());
+        if (unionIndex57 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, null);
+        } else {
+            if (unionIndex57 == 1) {
+                Utf8 charSequence57;
+                Object oldString57 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(57);
+                if (oldString57 instanceof Utf8) {
+                    charSequence57 = (decoder).readString(((Utf8) oldString57));
+                } else {
+                    charSequence57 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(57, charSequence57);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F57': "+ unionIndex57));
+            }
+        }
+        int unionIndex58 = (decoder.readIndex());
+        if (unionIndex58 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, null);
+        } else {
+            if (unionIndex58 == 1) {
+                Utf8 charSequence58;
+                Object oldString58 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(58);
+                if (oldString58 instanceof Utf8) {
+                    charSequence58 = (decoder).readString(((Utf8) oldString58));
+                } else {
+                    charSequence58 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(58, charSequence58);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F58': "+ unionIndex58));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema29(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex59 = (decoder.readIndex());
+        if (unionIndex59 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, null);
+        } else {
+            if (unionIndex59 == 1) {
+                Utf8 charSequence59;
+                Object oldString59 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(59);
+                if (oldString59 instanceof Utf8) {
+                    charSequence59 = (decoder).readString(((Utf8) oldString59));
+                } else {
+                    charSequence59 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(59, charSequence59);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F59': "+ unionIndex59));
+            }
+        }
+        int unionIndex60 = (decoder.readIndex());
+        if (unionIndex60 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, null);
+        } else {
+            if (unionIndex60 == 1) {
+                Utf8 charSequence60;
+                Object oldString60 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(60);
+                if (oldString60 instanceof Utf8) {
+                    charSequence60 = (decoder).readString(((Utf8) oldString60));
+                } else {
+                    charSequence60 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(60, charSequence60);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F60': "+ unionIndex60));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema30(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex61 = (decoder.readIndex());
+        if (unionIndex61 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, null);
+        } else {
+            if (unionIndex61 == 1) {
+                Utf8 charSequence61;
+                Object oldString61 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(61);
+                if (oldString61 instanceof Utf8) {
+                    charSequence61 = (decoder).readString(((Utf8) oldString61));
+                } else {
+                    charSequence61 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(61, charSequence61);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F61': "+ unionIndex61));
+            }
+        }
+        int unionIndex62 = (decoder.readIndex());
+        if (unionIndex62 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, null);
+        } else {
+            if (unionIndex62 == 1) {
+                Utf8 charSequence62;
+                Object oldString62 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(62);
+                if (oldString62 instanceof Utf8) {
+                    charSequence62 = (decoder).readString(((Utf8) oldString62));
+                } else {
+                    charSequence62 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(62, charSequence62);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F62': "+ unionIndex62));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema31(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex63 = (decoder.readIndex());
+        if (unionIndex63 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, null);
+        } else {
+            if (unionIndex63 == 1) {
+                Utf8 charSequence63;
+                Object oldString63 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(63);
+                if (oldString63 instanceof Utf8) {
+                    charSequence63 = (decoder).readString(((Utf8) oldString63));
+                } else {
+                    charSequence63 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(63, charSequence63);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F63': "+ unionIndex63));
+            }
+        }
+        int unionIndex64 = (decoder.readIndex());
+        if (unionIndex64 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, null);
+        } else {
+            if (unionIndex64 == 1) {
+                Utf8 charSequence64;
+                Object oldString64 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(64);
+                if (oldString64 instanceof Utf8) {
+                    charSequence64 = (decoder).readString(((Utf8) oldString64));
+                } else {
+                    charSequence64 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(64, charSequence64);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F64': "+ unionIndex64));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema32(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex65 = (decoder.readIndex());
+        if (unionIndex65 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, null);
+        } else {
+            if (unionIndex65 == 1) {
+                Utf8 charSequence65;
+                Object oldString65 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(65);
+                if (oldString65 instanceof Utf8) {
+                    charSequence65 = (decoder).readString(((Utf8) oldString65));
+                } else {
+                    charSequence65 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(65, charSequence65);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F65': "+ unionIndex65));
+            }
+        }
+        int unionIndex66 = (decoder.readIndex());
+        if (unionIndex66 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, null);
+        } else {
+            if (unionIndex66 == 1) {
+                Utf8 charSequence66;
+                Object oldString66 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(66);
+                if (oldString66 instanceof Utf8) {
+                    charSequence66 = (decoder).readString(((Utf8) oldString66));
+                } else {
+                    charSequence66 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(66, charSequence66);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F66': "+ unionIndex66));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema33(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex67 = (decoder.readIndex());
+        if (unionIndex67 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, null);
+        } else {
+            if (unionIndex67 == 1) {
+                Utf8 charSequence67;
+                Object oldString67 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(67);
+                if (oldString67 instanceof Utf8) {
+                    charSequence67 = (decoder).readString(((Utf8) oldString67));
+                } else {
+                    charSequence67 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(67, charSequence67);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F67': "+ unionIndex67));
+            }
+        }
+        int unionIndex68 = (decoder.readIndex());
+        if (unionIndex68 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, null);
+        } else {
+            if (unionIndex68 == 1) {
+                Utf8 charSequence68;
+                Object oldString68 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(68);
+                if (oldString68 instanceof Utf8) {
+                    charSequence68 = (decoder).readString(((Utf8) oldString68));
+                } else {
+                    charSequence68 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(68, charSequence68);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F68': "+ unionIndex68));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema34(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex69 = (decoder.readIndex());
+        if (unionIndex69 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, null);
+        } else {
+            if (unionIndex69 == 1) {
+                Utf8 charSequence69;
+                Object oldString69 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(69);
+                if (oldString69 instanceof Utf8) {
+                    charSequence69 = (decoder).readString(((Utf8) oldString69));
+                } else {
+                    charSequence69 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(69, charSequence69);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F69': "+ unionIndex69));
+            }
+        }
+        int unionIndex70 = (decoder.readIndex());
+        if (unionIndex70 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, null);
+        } else {
+            if (unionIndex70 == 1) {
+                Utf8 charSequence70;
+                Object oldString70 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(70);
+                if (oldString70 instanceof Utf8) {
+                    charSequence70 = (decoder).readString(((Utf8) oldString70));
+                } else {
+                    charSequence70 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(70, charSequence70);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F70': "+ unionIndex70));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema35(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex71 = (decoder.readIndex());
+        if (unionIndex71 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, null);
+        } else {
+            if (unionIndex71 == 1) {
+                Utf8 charSequence71;
+                Object oldString71 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(71);
+                if (oldString71 instanceof Utf8) {
+                    charSequence71 = (decoder).readString(((Utf8) oldString71));
+                } else {
+                    charSequence71 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(71, charSequence71);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F71': "+ unionIndex71));
+            }
+        }
+        int unionIndex72 = (decoder.readIndex());
+        if (unionIndex72 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, null);
+        } else {
+            if (unionIndex72 == 1) {
+                Utf8 charSequence72;
+                Object oldString72 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(72);
+                if (oldString72 instanceof Utf8) {
+                    charSequence72 = (decoder).readString(((Utf8) oldString72));
+                } else {
+                    charSequence72 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(72, charSequence72);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F72': "+ unionIndex72));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema36(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex73 = (decoder.readIndex());
+        if (unionIndex73 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, null);
+        } else {
+            if (unionIndex73 == 1) {
+                Utf8 charSequence73;
+                Object oldString73 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(73);
+                if (oldString73 instanceof Utf8) {
+                    charSequence73 = (decoder).readString(((Utf8) oldString73));
+                } else {
+                    charSequence73 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(73, charSequence73);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F73': "+ unionIndex73));
+            }
+        }
+        int unionIndex74 = (decoder.readIndex());
+        if (unionIndex74 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, null);
+        } else {
+            if (unionIndex74 == 1) {
+                Utf8 charSequence74;
+                Object oldString74 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(74);
+                if (oldString74 instanceof Utf8) {
+                    charSequence74 = (decoder).readString(((Utf8) oldString74));
+                } else {
+                    charSequence74 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(74, charSequence74);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F74': "+ unionIndex74));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema37(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex75 = (decoder.readIndex());
+        if (unionIndex75 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, null);
+        } else {
+            if (unionIndex75 == 1) {
+                Utf8 charSequence75;
+                Object oldString75 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(75);
+                if (oldString75 instanceof Utf8) {
+                    charSequence75 = (decoder).readString(((Utf8) oldString75));
+                } else {
+                    charSequence75 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(75, charSequence75);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F75': "+ unionIndex75));
+            }
+        }
+        int unionIndex76 = (decoder.readIndex());
+        if (unionIndex76 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, null);
+        } else {
+            if (unionIndex76 == 1) {
+                Utf8 charSequence76;
+                Object oldString76 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(76);
+                if (oldString76 instanceof Utf8) {
+                    charSequence76 = (decoder).readString(((Utf8) oldString76));
+                } else {
+                    charSequence76 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(76, charSequence76);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F76': "+ unionIndex76));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema38(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex77 = (decoder.readIndex());
+        if (unionIndex77 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, null);
+        } else {
+            if (unionIndex77 == 1) {
+                Utf8 charSequence77;
+                Object oldString77 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(77);
+                if (oldString77 instanceof Utf8) {
+                    charSequence77 = (decoder).readString(((Utf8) oldString77));
+                } else {
+                    charSequence77 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(77, charSequence77);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F77': "+ unionIndex77));
+            }
+        }
+        int unionIndex78 = (decoder.readIndex());
+        if (unionIndex78 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, null);
+        } else {
+            if (unionIndex78 == 1) {
+                Utf8 charSequence78;
+                Object oldString78 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(78);
+                if (oldString78 instanceof Utf8) {
+                    charSequence78 = (decoder).readString(((Utf8) oldString78));
+                } else {
+                    charSequence78 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(78, charSequence78);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F78': "+ unionIndex78));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema39(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex79 = (decoder.readIndex());
+        if (unionIndex79 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, null);
+        } else {
+            if (unionIndex79 == 1) {
+                Utf8 charSequence79;
+                Object oldString79 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(79);
+                if (oldString79 instanceof Utf8) {
+                    charSequence79 = (decoder).readString(((Utf8) oldString79));
+                } else {
+                    charSequence79 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(79, charSequence79);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F79': "+ unionIndex79));
+            }
+        }
+        int unionIndex80 = (decoder.readIndex());
+        if (unionIndex80 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, null);
+        } else {
+            if (unionIndex80 == 1) {
+                Utf8 charSequence80;
+                Object oldString80 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(80);
+                if (oldString80 instanceof Utf8) {
+                    charSequence80 = (decoder).readString(((Utf8) oldString80));
+                } else {
+                    charSequence80 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(80, charSequence80);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F80': "+ unionIndex80));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema40(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex81 = (decoder.readIndex());
+        if (unionIndex81 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, null);
+        } else {
+            if (unionIndex81 == 1) {
+                Utf8 charSequence81;
+                Object oldString81 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(81);
+                if (oldString81 instanceof Utf8) {
+                    charSequence81 = (decoder).readString(((Utf8) oldString81));
+                } else {
+                    charSequence81 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(81, charSequence81);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F81': "+ unionIndex81));
+            }
+        }
+        int unionIndex82 = (decoder.readIndex());
+        if (unionIndex82 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, null);
+        } else {
+            if (unionIndex82 == 1) {
+                Utf8 charSequence82;
+                Object oldString82 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(82);
+                if (oldString82 instanceof Utf8) {
+                    charSequence82 = (decoder).readString(((Utf8) oldString82));
+                } else {
+                    charSequence82 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(82, charSequence82);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F82': "+ unionIndex82));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema41(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex83 = (decoder.readIndex());
+        if (unionIndex83 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, null);
+        } else {
+            if (unionIndex83 == 1) {
+                Utf8 charSequence83;
+                Object oldString83 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(83);
+                if (oldString83 instanceof Utf8) {
+                    charSequence83 = (decoder).readString(((Utf8) oldString83));
+                } else {
+                    charSequence83 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(83, charSequence83);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F83': "+ unionIndex83));
+            }
+        }
+        int unionIndex84 = (decoder.readIndex());
+        if (unionIndex84 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, null);
+        } else {
+            if (unionIndex84 == 1) {
+                Utf8 charSequence84;
+                Object oldString84 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(84);
+                if (oldString84 instanceof Utf8) {
+                    charSequence84 = (decoder).readString(((Utf8) oldString84));
+                } else {
+                    charSequence84 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(84, charSequence84);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F84': "+ unionIndex84));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema42(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex85 = (decoder.readIndex());
+        if (unionIndex85 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, null);
+        } else {
+            if (unionIndex85 == 1) {
+                Utf8 charSequence85;
+                Object oldString85 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(85);
+                if (oldString85 instanceof Utf8) {
+                    charSequence85 = (decoder).readString(((Utf8) oldString85));
+                } else {
+                    charSequence85 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(85, charSequence85);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F85': "+ unionIndex85));
+            }
+        }
+        int unionIndex86 = (decoder.readIndex());
+        if (unionIndex86 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, null);
+        } else {
+            if (unionIndex86 == 1) {
+                Utf8 charSequence86;
+                Object oldString86 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(86);
+                if (oldString86 instanceof Utf8) {
+                    charSequence86 = (decoder).readString(((Utf8) oldString86));
+                } else {
+                    charSequence86 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(86, charSequence86);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F86': "+ unionIndex86));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema43(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex87 = (decoder.readIndex());
+        if (unionIndex87 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, null);
+        } else {
+            if (unionIndex87 == 1) {
+                Utf8 charSequence87;
+                Object oldString87 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(87);
+                if (oldString87 instanceof Utf8) {
+                    charSequence87 = (decoder).readString(((Utf8) oldString87));
+                } else {
+                    charSequence87 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(87, charSequence87);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F87': "+ unionIndex87));
+            }
+        }
+        int unionIndex88 = (decoder.readIndex());
+        if (unionIndex88 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, null);
+        } else {
+            if (unionIndex88 == 1) {
+                Utf8 charSequence88;
+                Object oldString88 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(88);
+                if (oldString88 instanceof Utf8) {
+                    charSequence88 = (decoder).readString(((Utf8) oldString88));
+                } else {
+                    charSequence88 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(88, charSequence88);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F88': "+ unionIndex88));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema44(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex89 = (decoder.readIndex());
+        if (unionIndex89 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, null);
+        } else {
+            if (unionIndex89 == 1) {
+                Utf8 charSequence89;
+                Object oldString89 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(89);
+                if (oldString89 instanceof Utf8) {
+                    charSequence89 = (decoder).readString(((Utf8) oldString89));
+                } else {
+                    charSequence89 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(89, charSequence89);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F89': "+ unionIndex89));
+            }
+        }
+        int unionIndex90 = (decoder.readIndex());
+        if (unionIndex90 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, null);
+        } else {
+            if (unionIndex90 == 1) {
+                Utf8 charSequence90;
+                Object oldString90 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(90);
+                if (oldString90 instanceof Utf8) {
+                    charSequence90 = (decoder).readString(((Utf8) oldString90));
+                } else {
+                    charSequence90 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(90, charSequence90);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F90': "+ unionIndex90));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema45(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex91 = (decoder.readIndex());
+        if (unionIndex91 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, null);
+        } else {
+            if (unionIndex91 == 1) {
+                Utf8 charSequence91;
+                Object oldString91 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(91);
+                if (oldString91 instanceof Utf8) {
+                    charSequence91 = (decoder).readString(((Utf8) oldString91));
+                } else {
+                    charSequence91 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(91, charSequence91);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F91': "+ unionIndex91));
+            }
+        }
+        int unionIndex92 = (decoder.readIndex());
+        if (unionIndex92 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, null);
+        } else {
+            if (unionIndex92 == 1) {
+                Utf8 charSequence92;
+                Object oldString92 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(92);
+                if (oldString92 instanceof Utf8) {
+                    charSequence92 = (decoder).readString(((Utf8) oldString92));
+                } else {
+                    charSequence92 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(92, charSequence92);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F92': "+ unionIndex92));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema46(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex93 = (decoder.readIndex());
+        if (unionIndex93 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, null);
+        } else {
+            if (unionIndex93 == 1) {
+                Utf8 charSequence93;
+                Object oldString93 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(93);
+                if (oldString93 instanceof Utf8) {
+                    charSequence93 = (decoder).readString(((Utf8) oldString93));
+                } else {
+                    charSequence93 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(93, charSequence93);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F93': "+ unionIndex93));
+            }
+        }
+        int unionIndex94 = (decoder.readIndex());
+        if (unionIndex94 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, null);
+        } else {
+            if (unionIndex94 == 1) {
+                Utf8 charSequence94;
+                Object oldString94 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(94);
+                if (oldString94 instanceof Utf8) {
+                    charSequence94 = (decoder).readString(((Utf8) oldString94));
+                } else {
+                    charSequence94 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(94, charSequence94);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F94': "+ unionIndex94));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema47(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex95 = (decoder.readIndex());
+        if (unionIndex95 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, null);
+        } else {
+            if (unionIndex95 == 1) {
+                Utf8 charSequence95;
+                Object oldString95 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(95);
+                if (oldString95 instanceof Utf8) {
+                    charSequence95 = (decoder).readString(((Utf8) oldString95));
+                } else {
+                    charSequence95 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(95, charSequence95);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F95': "+ unionIndex95));
+            }
+        }
+        int unionIndex96 = (decoder.readIndex());
+        if (unionIndex96 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, null);
+        } else {
+            if (unionIndex96 == 1) {
+                Utf8 charSequence96;
+                Object oldString96 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(96);
+                if (oldString96 instanceof Utf8) {
+                    charSequence96 = (decoder).readString(((Utf8) oldString96));
+                } else {
+                    charSequence96 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(96, charSequence96);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F96': "+ unionIndex96));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema48(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex97 = (decoder.readIndex());
+        if (unionIndex97 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, null);
+        } else {
+            if (unionIndex97 == 1) {
+                Utf8 charSequence97;
+                Object oldString97 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(97);
+                if (oldString97 instanceof Utf8) {
+                    charSequence97 = (decoder).readString(((Utf8) oldString97));
+                } else {
+                    charSequence97 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(97, charSequence97);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F97': "+ unionIndex97));
+            }
+        }
+        int unionIndex98 = (decoder.readIndex());
+        if (unionIndex98 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, null);
+        } else {
+            if (unionIndex98 == 1) {
+                Utf8 charSequence98;
+                Object oldString98 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(98);
+                if (oldString98 instanceof Utf8) {
+                    charSequence98 = (decoder).readString(((Utf8) oldString98));
+                } else {
+                    charSequence98 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(98, charSequence98);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F98': "+ unionIndex98));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema49(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex99 = (decoder.readIndex());
+        if (unionIndex99 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, null);
+        } else {
+            if (unionIndex99 == 1) {
+                Utf8 charSequence99;
+                Object oldString99 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(99);
+                if (oldString99 instanceof Utf8) {
+                    charSequence99 = (decoder).readString(((Utf8) oldString99));
+                } else {
+                    charSequence99 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(99, charSequence99);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F99': "+ unionIndex99));
+            }
+        }
+        int unionIndex100 = (decoder.readIndex());
+        if (unionIndex100 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, null);
+        } else {
+            if (unionIndex100 == 1) {
+                Utf8 charSequence100;
+                Object oldString100 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(100);
+                if (oldString100 instanceof Utf8) {
+                    charSequence100 = (decoder).readString(((Utf8) oldString100));
+                } else {
+                    charSequence100 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(100, charSequence100);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F100': "+ unionIndex100));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema50(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex101 = (decoder.readIndex());
+        if (unionIndex101 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, null);
+        } else {
+            if (unionIndex101 == 1) {
+                Utf8 charSequence101;
+                Object oldString101 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(101);
+                if (oldString101 instanceof Utf8) {
+                    charSequence101 = (decoder).readString(((Utf8) oldString101));
+                } else {
+                    charSequence101 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(101, charSequence101);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F101': "+ unionIndex101));
+            }
+        }
+        int unionIndex102 = (decoder.readIndex());
+        if (unionIndex102 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, null);
+        } else {
+            if (unionIndex102 == 1) {
+                Utf8 charSequence102;
+                Object oldString102 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(102);
+                if (oldString102 instanceof Utf8) {
+                    charSequence102 = (decoder).readString(((Utf8) oldString102));
+                } else {
+                    charSequence102 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(102, charSequence102);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F102': "+ unionIndex102));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema51(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex103 = (decoder.readIndex());
+        if (unionIndex103 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, null);
+        } else {
+            if (unionIndex103 == 1) {
+                Utf8 charSequence103;
+                Object oldString103 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(103);
+                if (oldString103 instanceof Utf8) {
+                    charSequence103 = (decoder).readString(((Utf8) oldString103));
+                } else {
+                    charSequence103 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(103, charSequence103);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F103': "+ unionIndex103));
+            }
+        }
+        int unionIndex104 = (decoder.readIndex());
+        if (unionIndex104 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, null);
+        } else {
+            if (unionIndex104 == 1) {
+                Utf8 charSequence104;
+                Object oldString104 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(104);
+                if (oldString104 instanceof Utf8) {
+                    charSequence104 = (decoder).readString(((Utf8) oldString104));
+                } else {
+                    charSequence104 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(104, charSequence104);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F104': "+ unionIndex104));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema52(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex105 = (decoder.readIndex());
+        if (unionIndex105 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, null);
+        } else {
+            if (unionIndex105 == 1) {
+                Utf8 charSequence105;
+                Object oldString105 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(105);
+                if (oldString105 instanceof Utf8) {
+                    charSequence105 = (decoder).readString(((Utf8) oldString105));
+                } else {
+                    charSequence105 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(105, charSequence105);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F105': "+ unionIndex105));
+            }
+        }
+        int unionIndex106 = (decoder.readIndex());
+        if (unionIndex106 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, null);
+        } else {
+            if (unionIndex106 == 1) {
+                Utf8 charSequence106;
+                Object oldString106 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(106);
+                if (oldString106 instanceof Utf8) {
+                    charSequence106 = (decoder).readString(((Utf8) oldString106));
+                } else {
+                    charSequence106 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(106, charSequence106);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F106': "+ unionIndex106));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema53(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex107 = (decoder.readIndex());
+        if (unionIndex107 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, null);
+        } else {
+            if (unionIndex107 == 1) {
+                Utf8 charSequence107;
+                Object oldString107 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(107);
+                if (oldString107 instanceof Utf8) {
+                    charSequence107 = (decoder).readString(((Utf8) oldString107));
+                } else {
+                    charSequence107 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(107, charSequence107);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F107': "+ unionIndex107));
+            }
+        }
+        int unionIndex108 = (decoder.readIndex());
+        if (unionIndex108 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, null);
+        } else {
+            if (unionIndex108 == 1) {
+                Utf8 charSequence108;
+                Object oldString108 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(108);
+                if (oldString108 instanceof Utf8) {
+                    charSequence108 = (decoder).readString(((Utf8) oldString108));
+                } else {
+                    charSequence108 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(108, charSequence108);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F108': "+ unionIndex108));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema54(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex109 = (decoder.readIndex());
+        if (unionIndex109 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, null);
+        } else {
+            if (unionIndex109 == 1) {
+                Utf8 charSequence109;
+                Object oldString109 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(109);
+                if (oldString109 instanceof Utf8) {
+                    charSequence109 = (decoder).readString(((Utf8) oldString109));
+                } else {
+                    charSequence109 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(109, charSequence109);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F109': "+ unionIndex109));
+            }
+        }
+        int unionIndex110 = (decoder.readIndex());
+        if (unionIndex110 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, null);
+        } else {
+            if (unionIndex110 == 1) {
+                Utf8 charSequence110;
+                Object oldString110 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(110);
+                if (oldString110 instanceof Utf8) {
+                    charSequence110 = (decoder).readString(((Utf8) oldString110));
+                } else {
+                    charSequence110 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(110, charSequence110);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F110': "+ unionIndex110));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema55(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex111 = (decoder.readIndex());
+        if (unionIndex111 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, null);
+        } else {
+            if (unionIndex111 == 1) {
+                Utf8 charSequence111;
+                Object oldString111 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(111);
+                if (oldString111 instanceof Utf8) {
+                    charSequence111 = (decoder).readString(((Utf8) oldString111));
+                } else {
+                    charSequence111 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(111, charSequence111);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F111': "+ unionIndex111));
+            }
+        }
+        int unionIndex112 = (decoder.readIndex());
+        if (unionIndex112 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, null);
+        } else {
+            if (unionIndex112 == 1) {
+                Utf8 charSequence112;
+                Object oldString112 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(112);
+                if (oldString112 instanceof Utf8) {
+                    charSequence112 = (decoder).readString(((Utf8) oldString112));
+                } else {
+                    charSequence112 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(112, charSequence112);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F112': "+ unionIndex112));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema56(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex113 = (decoder.readIndex());
+        if (unionIndex113 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, null);
+        } else {
+            if (unionIndex113 == 1) {
+                Utf8 charSequence113;
+                Object oldString113 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(113);
+                if (oldString113 instanceof Utf8) {
+                    charSequence113 = (decoder).readString(((Utf8) oldString113));
+                } else {
+                    charSequence113 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(113, charSequence113);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F113': "+ unionIndex113));
+            }
+        }
+        int unionIndex114 = (decoder.readIndex());
+        if (unionIndex114 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, null);
+        } else {
+            if (unionIndex114 == 1) {
+                Utf8 charSequence114;
+                Object oldString114 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(114);
+                if (oldString114 instanceof Utf8) {
+                    charSequence114 = (decoder).readString(((Utf8) oldString114));
+                } else {
+                    charSequence114 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(114, charSequence114);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F114': "+ unionIndex114));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema57(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex115 = (decoder.readIndex());
+        if (unionIndex115 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, null);
+        } else {
+            if (unionIndex115 == 1) {
+                Utf8 charSequence115;
+                Object oldString115 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(115);
+                if (oldString115 instanceof Utf8) {
+                    charSequence115 = (decoder).readString(((Utf8) oldString115));
+                } else {
+                    charSequence115 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(115, charSequence115);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F115': "+ unionIndex115));
+            }
+        }
+        int unionIndex116 = (decoder.readIndex());
+        if (unionIndex116 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, null);
+        } else {
+            if (unionIndex116 == 1) {
+                Utf8 charSequence116;
+                Object oldString116 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(116);
+                if (oldString116 instanceof Utf8) {
+                    charSequence116 = (decoder).readString(((Utf8) oldString116));
+                } else {
+                    charSequence116 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(116, charSequence116);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F116': "+ unionIndex116));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema58(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex117 = (decoder.readIndex());
+        if (unionIndex117 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, null);
+        } else {
+            if (unionIndex117 == 1) {
+                Utf8 charSequence117;
+                Object oldString117 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(117);
+                if (oldString117 instanceof Utf8) {
+                    charSequence117 = (decoder).readString(((Utf8) oldString117));
+                } else {
+                    charSequence117 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(117, charSequence117);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F117': "+ unionIndex117));
+            }
+        }
+        int unionIndex118 = (decoder.readIndex());
+        if (unionIndex118 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, null);
+        } else {
+            if (unionIndex118 == 1) {
+                Utf8 charSequence118;
+                Object oldString118 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(118);
+                if (oldString118 instanceof Utf8) {
+                    charSequence118 = (decoder).readString(((Utf8) oldString118));
+                } else {
+                    charSequence118 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(118, charSequence118);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F118': "+ unionIndex118));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema59(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex119 = (decoder.readIndex());
+        if (unionIndex119 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, null);
+        } else {
+            if (unionIndex119 == 1) {
+                Utf8 charSequence119;
+                Object oldString119 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(119);
+                if (oldString119 instanceof Utf8) {
+                    charSequence119 = (decoder).readString(((Utf8) oldString119));
+                } else {
+                    charSequence119 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(119, charSequence119);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F119': "+ unionIndex119));
+            }
+        }
+        int unionIndex120 = (decoder.readIndex());
+        if (unionIndex120 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, null);
+        } else {
+            if (unionIndex120 == 1) {
+                Utf8 charSequence120;
+                Object oldString120 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(120);
+                if (oldString120 instanceof Utf8) {
+                    charSequence120 = (decoder).readString(((Utf8) oldString120));
+                } else {
+                    charSequence120 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(120, charSequence120);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F120': "+ unionIndex120));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema60(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex121 = (decoder.readIndex());
+        if (unionIndex121 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, null);
+        } else {
+            if (unionIndex121 == 1) {
+                Utf8 charSequence121;
+                Object oldString121 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(121);
+                if (oldString121 instanceof Utf8) {
+                    charSequence121 = (decoder).readString(((Utf8) oldString121));
+                } else {
+                    charSequence121 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(121, charSequence121);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F121': "+ unionIndex121));
+            }
+        }
+        int unionIndex122 = (decoder.readIndex());
+        if (unionIndex122 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, null);
+        } else {
+            if (unionIndex122 == 1) {
+                Utf8 charSequence122;
+                Object oldString122 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(122);
+                if (oldString122 instanceof Utf8) {
+                    charSequence122 = (decoder).readString(((Utf8) oldString122));
+                } else {
+                    charSequence122 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(122, charSequence122);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F122': "+ unionIndex122));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema61(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex123 = (decoder.readIndex());
+        if (unionIndex123 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, null);
+        } else {
+            if (unionIndex123 == 1) {
+                Utf8 charSequence123;
+                Object oldString123 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(123);
+                if (oldString123 instanceof Utf8) {
+                    charSequence123 = (decoder).readString(((Utf8) oldString123));
+                } else {
+                    charSequence123 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(123, charSequence123);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F123': "+ unionIndex123));
+            }
+        }
+        int unionIndex124 = (decoder.readIndex());
+        if (unionIndex124 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, null);
+        } else {
+            if (unionIndex124 == 1) {
+                Utf8 charSequence124;
+                Object oldString124 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(124);
+                if (oldString124 instanceof Utf8) {
+                    charSequence124 = (decoder).readString(((Utf8) oldString124));
+                } else {
+                    charSequence124 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(124, charSequence124);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F124': "+ unionIndex124));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema62(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex125 = (decoder.readIndex());
+        if (unionIndex125 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, null);
+        } else {
+            if (unionIndex125 == 1) {
+                Utf8 charSequence125;
+                Object oldString125 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(125);
+                if (oldString125 instanceof Utf8) {
+                    charSequence125 = (decoder).readString(((Utf8) oldString125));
+                } else {
+                    charSequence125 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(125, charSequence125);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F125': "+ unionIndex125));
+            }
+        }
+        int unionIndex126 = (decoder.readIndex());
+        if (unionIndex126 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, null);
+        } else {
+            if (unionIndex126 == 1) {
+                Utf8 charSequence126;
+                Object oldString126 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(126);
+                if (oldString126 instanceof Utf8) {
+                    charSequence126 = (decoder).readString(((Utf8) oldString126));
+                } else {
+                    charSequence126 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(126, charSequence126);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F126': "+ unionIndex126));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema63(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex127 = (decoder.readIndex());
+        if (unionIndex127 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, null);
+        } else {
+            if (unionIndex127 == 1) {
+                Utf8 charSequence127;
+                Object oldString127 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(127);
+                if (oldString127 instanceof Utf8) {
+                    charSequence127 = (decoder).readString(((Utf8) oldString127));
+                } else {
+                    charSequence127 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(127, charSequence127);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F127': "+ unionIndex127));
+            }
+        }
+        int unionIndex128 = (decoder.readIndex());
+        if (unionIndex128 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, null);
+        } else {
+            if (unionIndex128 == 1) {
+                Utf8 charSequence128;
+                Object oldString128 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(128);
+                if (oldString128 instanceof Utf8) {
+                    charSequence128 = (decoder).readString(((Utf8) oldString128));
+                } else {
+                    charSequence128 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(128, charSequence128);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F128': "+ unionIndex128));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema64(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex129 = (decoder.readIndex());
+        if (unionIndex129 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, null);
+        } else {
+            if (unionIndex129 == 1) {
+                Utf8 charSequence129;
+                Object oldString129 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(129);
+                if (oldString129 instanceof Utf8) {
+                    charSequence129 = (decoder).readString(((Utf8) oldString129));
+                } else {
+                    charSequence129 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(129, charSequence129);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F129': "+ unionIndex129));
+            }
+        }
+        int unionIndex130 = (decoder.readIndex());
+        if (unionIndex130 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, null);
+        } else {
+            if (unionIndex130 == 1) {
+                Utf8 charSequence130;
+                Object oldString130 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(130);
+                if (oldString130 instanceof Utf8) {
+                    charSequence130 = (decoder).readString(((Utf8) oldString130));
+                } else {
+                    charSequence130 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(130, charSequence130);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F130': "+ unionIndex130));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema65(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex131 = (decoder.readIndex());
+        if (unionIndex131 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, null);
+        } else {
+            if (unionIndex131 == 1) {
+                Utf8 charSequence131;
+                Object oldString131 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(131);
+                if (oldString131 instanceof Utf8) {
+                    charSequence131 = (decoder).readString(((Utf8) oldString131));
+                } else {
+                    charSequence131 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(131, charSequence131);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F131': "+ unionIndex131));
+            }
+        }
+        int unionIndex132 = (decoder.readIndex());
+        if (unionIndex132 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, null);
+        } else {
+            if (unionIndex132 == 1) {
+                Utf8 charSequence132;
+                Object oldString132 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(132);
+                if (oldString132 instanceof Utf8) {
+                    charSequence132 = (decoder).readString(((Utf8) oldString132));
+                } else {
+                    charSequence132 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(132, charSequence132);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F132': "+ unionIndex132));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema66(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex133 = (decoder.readIndex());
+        if (unionIndex133 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, null);
+        } else {
+            if (unionIndex133 == 1) {
+                Utf8 charSequence133;
+                Object oldString133 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(133);
+                if (oldString133 instanceof Utf8) {
+                    charSequence133 = (decoder).readString(((Utf8) oldString133));
+                } else {
+                    charSequence133 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(133, charSequence133);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F133': "+ unionIndex133));
+            }
+        }
+        int unionIndex134 = (decoder.readIndex());
+        if (unionIndex134 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, null);
+        } else {
+            if (unionIndex134 == 1) {
+                Utf8 charSequence134;
+                Object oldString134 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(134);
+                if (oldString134 instanceof Utf8) {
+                    charSequence134 = (decoder).readString(((Utf8) oldString134));
+                } else {
+                    charSequence134 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(134, charSequence134);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F134': "+ unionIndex134));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema67(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex135 = (decoder.readIndex());
+        if (unionIndex135 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, null);
+        } else {
+            if (unionIndex135 == 1) {
+                Utf8 charSequence135;
+                Object oldString135 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(135);
+                if (oldString135 instanceof Utf8) {
+                    charSequence135 = (decoder).readString(((Utf8) oldString135));
+                } else {
+                    charSequence135 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(135, charSequence135);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F135': "+ unionIndex135));
+            }
+        }
+        int unionIndex136 = (decoder.readIndex());
+        if (unionIndex136 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, null);
+        } else {
+            if (unionIndex136 == 1) {
+                Utf8 charSequence136;
+                Object oldString136 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(136);
+                if (oldString136 instanceof Utf8) {
+                    charSequence136 = (decoder).readString(((Utf8) oldString136));
+                } else {
+                    charSequence136 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(136, charSequence136);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F136': "+ unionIndex136));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema68(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex137 = (decoder.readIndex());
+        if (unionIndex137 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, null);
+        } else {
+            if (unionIndex137 == 1) {
+                Utf8 charSequence137;
+                Object oldString137 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(137);
+                if (oldString137 instanceof Utf8) {
+                    charSequence137 = (decoder).readString(((Utf8) oldString137));
+                } else {
+                    charSequence137 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(137, charSequence137);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F137': "+ unionIndex137));
+            }
+        }
+        int unionIndex138 = (decoder.readIndex());
+        if (unionIndex138 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, null);
+        } else {
+            if (unionIndex138 == 1) {
+                Utf8 charSequence138;
+                Object oldString138 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(138);
+                if (oldString138 instanceof Utf8) {
+                    charSequence138 = (decoder).readString(((Utf8) oldString138));
+                } else {
+                    charSequence138 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(138, charSequence138);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F138': "+ unionIndex138));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema69(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex139 = (decoder.readIndex());
+        if (unionIndex139 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, null);
+        } else {
+            if (unionIndex139 == 1) {
+                Utf8 charSequence139;
+                Object oldString139 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(139);
+                if (oldString139 instanceof Utf8) {
+                    charSequence139 = (decoder).readString(((Utf8) oldString139));
+                } else {
+                    charSequence139 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(139, charSequence139);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F139': "+ unionIndex139));
+            }
+        }
+        int unionIndex140 = (decoder.readIndex());
+        if (unionIndex140 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, null);
+        } else {
+            if (unionIndex140 == 1) {
+                Utf8 charSequence140;
+                Object oldString140 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(140);
+                if (oldString140 instanceof Utf8) {
+                    charSequence140 = (decoder).readString(((Utf8) oldString140));
+                } else {
+                    charSequence140 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(140, charSequence140);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F140': "+ unionIndex140));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema70(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex141 = (decoder.readIndex());
+        if (unionIndex141 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, null);
+        } else {
+            if (unionIndex141 == 1) {
+                Utf8 charSequence141;
+                Object oldString141 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(141);
+                if (oldString141 instanceof Utf8) {
+                    charSequence141 = (decoder).readString(((Utf8) oldString141));
+                } else {
+                    charSequence141 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(141, charSequence141);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F141': "+ unionIndex141));
+            }
+        }
+        int unionIndex142 = (decoder.readIndex());
+        if (unionIndex142 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, null);
+        } else {
+            if (unionIndex142 == 1) {
+                Utf8 charSequence142;
+                Object oldString142 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(142);
+                if (oldString142 instanceof Utf8) {
+                    charSequence142 = (decoder).readString(((Utf8) oldString142));
+                } else {
+                    charSequence142 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(142, charSequence142);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F142': "+ unionIndex142));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema71(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex143 = (decoder.readIndex());
+        if (unionIndex143 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, null);
+        } else {
+            if (unionIndex143 == 1) {
+                Utf8 charSequence143;
+                Object oldString143 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(143);
+                if (oldString143 instanceof Utf8) {
+                    charSequence143 = (decoder).readString(((Utf8) oldString143));
+                } else {
+                    charSequence143 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(143, charSequence143);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F143': "+ unionIndex143));
+            }
+        }
+        int unionIndex144 = (decoder.readIndex());
+        if (unionIndex144 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, null);
+        } else {
+            if (unionIndex144 == 1) {
+                Utf8 charSequence144;
+                Object oldString144 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(144);
+                if (oldString144 instanceof Utf8) {
+                    charSequence144 = (decoder).readString(((Utf8) oldString144));
+                } else {
+                    charSequence144 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(144, charSequence144);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F144': "+ unionIndex144));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema72(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex145 = (decoder.readIndex());
+        if (unionIndex145 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, null);
+        } else {
+            if (unionIndex145 == 1) {
+                Utf8 charSequence145;
+                Object oldString145 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(145);
+                if (oldString145 instanceof Utf8) {
+                    charSequence145 = (decoder).readString(((Utf8) oldString145));
+                } else {
+                    charSequence145 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(145, charSequence145);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F145': "+ unionIndex145));
+            }
+        }
+        int unionIndex146 = (decoder.readIndex());
+        if (unionIndex146 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, null);
+        } else {
+            if (unionIndex146 == 1) {
+                Utf8 charSequence146;
+                Object oldString146 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(146);
+                if (oldString146 instanceof Utf8) {
+                    charSequence146 = (decoder).readString(((Utf8) oldString146));
+                } else {
+                    charSequence146 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(146, charSequence146);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F146': "+ unionIndex146));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema73(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex147 = (decoder.readIndex());
+        if (unionIndex147 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, null);
+        } else {
+            if (unionIndex147 == 1) {
+                Utf8 charSequence147;
+                Object oldString147 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(147);
+                if (oldString147 instanceof Utf8) {
+                    charSequence147 = (decoder).readString(((Utf8) oldString147));
+                } else {
+                    charSequence147 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(147, charSequence147);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F147': "+ unionIndex147));
+            }
+        }
+        int unionIndex148 = (decoder.readIndex());
+        if (unionIndex148 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, null);
+        } else {
+            if (unionIndex148 == 1) {
+                Utf8 charSequence148;
+                Object oldString148 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(148);
+                if (oldString148 instanceof Utf8) {
+                    charSequence148 = (decoder).readString(((Utf8) oldString148));
+                } else {
+                    charSequence148 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(148, charSequence148);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F148': "+ unionIndex148));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema74(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex149 = (decoder.readIndex());
+        if (unionIndex149 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, null);
+        } else {
+            if (unionIndex149 == 1) {
+                Utf8 charSequence149;
+                Object oldString149 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(149);
+                if (oldString149 instanceof Utf8) {
+                    charSequence149 = (decoder).readString(((Utf8) oldString149));
+                } else {
+                    charSequence149 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(149, charSequence149);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F149': "+ unionIndex149));
+            }
+        }
+        int unionIndex150 = (decoder.readIndex());
+        if (unionIndex150 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, null);
+        } else {
+            if (unionIndex150 == 1) {
+                Utf8 charSequence150;
+                Object oldString150 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(150);
+                if (oldString150 instanceof Utf8) {
+                    charSequence150 = (decoder).readString(((Utf8) oldString150));
+                } else {
+                    charSequence150 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(150, charSequence150);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F150': "+ unionIndex150));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema75(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex151 = (decoder.readIndex());
+        if (unionIndex151 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, null);
+        } else {
+            if (unionIndex151 == 1) {
+                Utf8 charSequence151;
+                Object oldString151 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(151);
+                if (oldString151 instanceof Utf8) {
+                    charSequence151 = (decoder).readString(((Utf8) oldString151));
+                } else {
+                    charSequence151 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(151, charSequence151);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F151': "+ unionIndex151));
+            }
+        }
+        int unionIndex152 = (decoder.readIndex());
+        if (unionIndex152 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, null);
+        } else {
+            if (unionIndex152 == 1) {
+                Utf8 charSequence152;
+                Object oldString152 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(152);
+                if (oldString152 instanceof Utf8) {
+                    charSequence152 = (decoder).readString(((Utf8) oldString152));
+                } else {
+                    charSequence152 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(152, charSequence152);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F152': "+ unionIndex152));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema76(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex153 = (decoder.readIndex());
+        if (unionIndex153 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, null);
+        } else {
+            if (unionIndex153 == 1) {
+                Utf8 charSequence153;
+                Object oldString153 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(153);
+                if (oldString153 instanceof Utf8) {
+                    charSequence153 = (decoder).readString(((Utf8) oldString153));
+                } else {
+                    charSequence153 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(153, charSequence153);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F153': "+ unionIndex153));
+            }
+        }
+        int unionIndex154 = (decoder.readIndex());
+        if (unionIndex154 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, null);
+        } else {
+            if (unionIndex154 == 1) {
+                Utf8 charSequence154;
+                Object oldString154 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(154);
+                if (oldString154 instanceof Utf8) {
+                    charSequence154 = (decoder).readString(((Utf8) oldString154));
+                } else {
+                    charSequence154 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(154, charSequence154);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F154': "+ unionIndex154));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema77(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex155 = (decoder.readIndex());
+        if (unionIndex155 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, null);
+        } else {
+            if (unionIndex155 == 1) {
+                Utf8 charSequence155;
+                Object oldString155 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(155);
+                if (oldString155 instanceof Utf8) {
+                    charSequence155 = (decoder).readString(((Utf8) oldString155));
+                } else {
+                    charSequence155 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(155, charSequence155);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F155': "+ unionIndex155));
+            }
+        }
+        int unionIndex156 = (decoder.readIndex());
+        if (unionIndex156 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, null);
+        } else {
+            if (unionIndex156 == 1) {
+                Utf8 charSequence156;
+                Object oldString156 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(156);
+                if (oldString156 instanceof Utf8) {
+                    charSequence156 = (decoder).readString(((Utf8) oldString156));
+                } else {
+                    charSequence156 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(156, charSequence156);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F156': "+ unionIndex156));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema78(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex157 = (decoder.readIndex());
+        if (unionIndex157 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, null);
+        } else {
+            if (unionIndex157 == 1) {
+                Utf8 charSequence157;
+                Object oldString157 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(157);
+                if (oldString157 instanceof Utf8) {
+                    charSequence157 = (decoder).readString(((Utf8) oldString157));
+                } else {
+                    charSequence157 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(157, charSequence157);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F157': "+ unionIndex157));
+            }
+        }
+        int unionIndex158 = (decoder.readIndex());
+        if (unionIndex158 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, null);
+        } else {
+            if (unionIndex158 == 1) {
+                Utf8 charSequence158;
+                Object oldString158 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(158);
+                if (oldString158 instanceof Utf8) {
+                    charSequence158 = (decoder).readString(((Utf8) oldString158));
+                } else {
+                    charSequence158 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(158, charSequence158);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F158': "+ unionIndex158));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema79(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex159 = (decoder.readIndex());
+        if (unionIndex159 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, null);
+        } else {
+            if (unionIndex159 == 1) {
+                Utf8 charSequence159;
+                Object oldString159 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(159);
+                if (oldString159 instanceof Utf8) {
+                    charSequence159 = (decoder).readString(((Utf8) oldString159));
+                } else {
+                    charSequence159 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(159, charSequence159);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F159': "+ unionIndex159));
+            }
+        }
+        int unionIndex160 = (decoder.readIndex());
+        if (unionIndex160 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, null);
+        } else {
+            if (unionIndex160 == 1) {
+                Utf8 charSequence160;
+                Object oldString160 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(160);
+                if (oldString160 instanceof Utf8) {
+                    charSequence160 = (decoder).readString(((Utf8) oldString160));
+                } else {
+                    charSequence160 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(160, charSequence160);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F160': "+ unionIndex160));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema80(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex161 = (decoder.readIndex());
+        if (unionIndex161 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, null);
+        } else {
+            if (unionIndex161 == 1) {
+                Utf8 charSequence161;
+                Object oldString161 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(161);
+                if (oldString161 instanceof Utf8) {
+                    charSequence161 = (decoder).readString(((Utf8) oldString161));
+                } else {
+                    charSequence161 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(161, charSequence161);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F161': "+ unionIndex161));
+            }
+        }
+        int unionIndex162 = (decoder.readIndex());
+        if (unionIndex162 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, null);
+        } else {
+            if (unionIndex162 == 1) {
+                Utf8 charSequence162;
+                Object oldString162 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(162);
+                if (oldString162 instanceof Utf8) {
+                    charSequence162 = (decoder).readString(((Utf8) oldString162));
+                } else {
+                    charSequence162 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(162, charSequence162);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F162': "+ unionIndex162));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema81(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex163 = (decoder.readIndex());
+        if (unionIndex163 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, null);
+        } else {
+            if (unionIndex163 == 1) {
+                Utf8 charSequence163;
+                Object oldString163 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(163);
+                if (oldString163 instanceof Utf8) {
+                    charSequence163 = (decoder).readString(((Utf8) oldString163));
+                } else {
+                    charSequence163 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(163, charSequence163);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F163': "+ unionIndex163));
+            }
+        }
+        int unionIndex164 = (decoder.readIndex());
+        if (unionIndex164 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, null);
+        } else {
+            if (unionIndex164 == 1) {
+                Utf8 charSequence164;
+                Object oldString164 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(164);
+                if (oldString164 instanceof Utf8) {
+                    charSequence164 = (decoder).readString(((Utf8) oldString164));
+                } else {
+                    charSequence164 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(164, charSequence164);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F164': "+ unionIndex164));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema82(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex165 = (decoder.readIndex());
+        if (unionIndex165 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, null);
+        } else {
+            if (unionIndex165 == 1) {
+                Utf8 charSequence165;
+                Object oldString165 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(165);
+                if (oldString165 instanceof Utf8) {
+                    charSequence165 = (decoder).readString(((Utf8) oldString165));
+                } else {
+                    charSequence165 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(165, charSequence165);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F165': "+ unionIndex165));
+            }
+        }
+        int unionIndex166 = (decoder.readIndex());
+        if (unionIndex166 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, null);
+        } else {
+            if (unionIndex166 == 1) {
+                Utf8 charSequence166;
+                Object oldString166 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(166);
+                if (oldString166 instanceof Utf8) {
+                    charSequence166 = (decoder).readString(((Utf8) oldString166));
+                } else {
+                    charSequence166 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(166, charSequence166);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F166': "+ unionIndex166));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema83(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex167 = (decoder.readIndex());
+        if (unionIndex167 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, null);
+        } else {
+            if (unionIndex167 == 1) {
+                Utf8 charSequence167;
+                Object oldString167 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(167);
+                if (oldString167 instanceof Utf8) {
+                    charSequence167 = (decoder).readString(((Utf8) oldString167));
+                } else {
+                    charSequence167 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(167, charSequence167);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F167': "+ unionIndex167));
+            }
+        }
+        int unionIndex168 = (decoder.readIndex());
+        if (unionIndex168 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, null);
+        } else {
+            if (unionIndex168 == 1) {
+                Utf8 charSequence168;
+                Object oldString168 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(168);
+                if (oldString168 instanceof Utf8) {
+                    charSequence168 = (decoder).readString(((Utf8) oldString168));
+                } else {
+                    charSequence168 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(168, charSequence168);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F168': "+ unionIndex168));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema84(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex169 = (decoder.readIndex());
+        if (unionIndex169 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, null);
+        } else {
+            if (unionIndex169 == 1) {
+                Utf8 charSequence169;
+                Object oldString169 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(169);
+                if (oldString169 instanceof Utf8) {
+                    charSequence169 = (decoder).readString(((Utf8) oldString169));
+                } else {
+                    charSequence169 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(169, charSequence169);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F169': "+ unionIndex169));
+            }
+        }
+        int unionIndex170 = (decoder.readIndex());
+        if (unionIndex170 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, null);
+        } else {
+            if (unionIndex170 == 1) {
+                Utf8 charSequence170;
+                Object oldString170 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(170);
+                if (oldString170 instanceof Utf8) {
+                    charSequence170 = (decoder).readString(((Utf8) oldString170));
+                } else {
+                    charSequence170 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(170, charSequence170);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F170': "+ unionIndex170));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema85(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex171 = (decoder.readIndex());
+        if (unionIndex171 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, null);
+        } else {
+            if (unionIndex171 == 1) {
+                Utf8 charSequence171;
+                Object oldString171 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(171);
+                if (oldString171 instanceof Utf8) {
+                    charSequence171 = (decoder).readString(((Utf8) oldString171));
+                } else {
+                    charSequence171 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(171, charSequence171);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F171': "+ unionIndex171));
+            }
+        }
+        int unionIndex172 = (decoder.readIndex());
+        if (unionIndex172 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, null);
+        } else {
+            if (unionIndex172 == 1) {
+                Utf8 charSequence172;
+                Object oldString172 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(172);
+                if (oldString172 instanceof Utf8) {
+                    charSequence172 = (decoder).readString(((Utf8) oldString172));
+                } else {
+                    charSequence172 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(172, charSequence172);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F172': "+ unionIndex172));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema86(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex173 = (decoder.readIndex());
+        if (unionIndex173 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, null);
+        } else {
+            if (unionIndex173 == 1) {
+                Utf8 charSequence173;
+                Object oldString173 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(173);
+                if (oldString173 instanceof Utf8) {
+                    charSequence173 = (decoder).readString(((Utf8) oldString173));
+                } else {
+                    charSequence173 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(173, charSequence173);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F173': "+ unionIndex173));
+            }
+        }
+        int unionIndex174 = (decoder.readIndex());
+        if (unionIndex174 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, null);
+        } else {
+            if (unionIndex174 == 1) {
+                Utf8 charSequence174;
+                Object oldString174 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(174);
+                if (oldString174 instanceof Utf8) {
+                    charSequence174 = (decoder).readString(((Utf8) oldString174));
+                } else {
+                    charSequence174 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(174, charSequence174);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F174': "+ unionIndex174));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema87(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex175 = (decoder.readIndex());
+        if (unionIndex175 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, null);
+        } else {
+            if (unionIndex175 == 1) {
+                Utf8 charSequence175;
+                Object oldString175 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(175);
+                if (oldString175 instanceof Utf8) {
+                    charSequence175 = (decoder).readString(((Utf8) oldString175));
+                } else {
+                    charSequence175 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(175, charSequence175);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F175': "+ unionIndex175));
+            }
+        }
+        int unionIndex176 = (decoder.readIndex());
+        if (unionIndex176 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, null);
+        } else {
+            if (unionIndex176 == 1) {
+                Utf8 charSequence176;
+                Object oldString176 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(176);
+                if (oldString176 instanceof Utf8) {
+                    charSequence176 = (decoder).readString(((Utf8) oldString176));
+                } else {
+                    charSequence176 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(176, charSequence176);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F176': "+ unionIndex176));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema88(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex177 = (decoder.readIndex());
+        if (unionIndex177 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, null);
+        } else {
+            if (unionIndex177 == 1) {
+                Utf8 charSequence177;
+                Object oldString177 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(177);
+                if (oldString177 instanceof Utf8) {
+                    charSequence177 = (decoder).readString(((Utf8) oldString177));
+                } else {
+                    charSequence177 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(177, charSequence177);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F177': "+ unionIndex177));
+            }
+        }
+        int unionIndex178 = (decoder.readIndex());
+        if (unionIndex178 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, null);
+        } else {
+            if (unionIndex178 == 1) {
+                Utf8 charSequence178;
+                Object oldString178 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(178);
+                if (oldString178 instanceof Utf8) {
+                    charSequence178 = (decoder).readString(((Utf8) oldString178));
+                } else {
+                    charSequence178 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(178, charSequence178);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F178': "+ unionIndex178));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema89(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex179 = (decoder.readIndex());
+        if (unionIndex179 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, null);
+        } else {
+            if (unionIndex179 == 1) {
+                Utf8 charSequence179;
+                Object oldString179 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(179);
+                if (oldString179 instanceof Utf8) {
+                    charSequence179 = (decoder).readString(((Utf8) oldString179));
+                } else {
+                    charSequence179 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(179, charSequence179);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F179': "+ unionIndex179));
+            }
+        }
+        int unionIndex180 = (decoder.readIndex());
+        if (unionIndex180 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, null);
+        } else {
+            if (unionIndex180 == 1) {
+                Utf8 charSequence180;
+                Object oldString180 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(180);
+                if (oldString180 instanceof Utf8) {
+                    charSequence180 = (decoder).readString(((Utf8) oldString180));
+                } else {
+                    charSequence180 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(180, charSequence180);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F180': "+ unionIndex180));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema90(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex181 = (decoder.readIndex());
+        if (unionIndex181 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, null);
+        } else {
+            if (unionIndex181 == 1) {
+                Utf8 charSequence181;
+                Object oldString181 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(181);
+                if (oldString181 instanceof Utf8) {
+                    charSequence181 = (decoder).readString(((Utf8) oldString181));
+                } else {
+                    charSequence181 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(181, charSequence181);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F181': "+ unionIndex181));
+            }
+        }
+        int unionIndex182 = (decoder.readIndex());
+        if (unionIndex182 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, null);
+        } else {
+            if (unionIndex182 == 1) {
+                Utf8 charSequence182;
+                Object oldString182 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(182);
+                if (oldString182 instanceof Utf8) {
+                    charSequence182 = (decoder).readString(((Utf8) oldString182));
+                } else {
+                    charSequence182 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(182, charSequence182);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F182': "+ unionIndex182));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema91(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex183 = (decoder.readIndex());
+        if (unionIndex183 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, null);
+        } else {
+            if (unionIndex183 == 1) {
+                Utf8 charSequence183;
+                Object oldString183 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(183);
+                if (oldString183 instanceof Utf8) {
+                    charSequence183 = (decoder).readString(((Utf8) oldString183));
+                } else {
+                    charSequence183 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(183, charSequence183);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F183': "+ unionIndex183));
+            }
+        }
+        int unionIndex184 = (decoder.readIndex());
+        if (unionIndex184 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, null);
+        } else {
+            if (unionIndex184 == 1) {
+                Utf8 charSequence184;
+                Object oldString184 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(184);
+                if (oldString184 instanceof Utf8) {
+                    charSequence184 = (decoder).readString(((Utf8) oldString184));
+                } else {
+                    charSequence184 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(184, charSequence184);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F184': "+ unionIndex184));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema92(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex185 = (decoder.readIndex());
+        if (unionIndex185 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, null);
+        } else {
+            if (unionIndex185 == 1) {
+                Utf8 charSequence185;
+                Object oldString185 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(185);
+                if (oldString185 instanceof Utf8) {
+                    charSequence185 = (decoder).readString(((Utf8) oldString185));
+                } else {
+                    charSequence185 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(185, charSequence185);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F185': "+ unionIndex185));
+            }
+        }
+        int unionIndex186 = (decoder.readIndex());
+        if (unionIndex186 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, null);
+        } else {
+            if (unionIndex186 == 1) {
+                Utf8 charSequence186;
+                Object oldString186 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(186);
+                if (oldString186 instanceof Utf8) {
+                    charSequence186 = (decoder).readString(((Utf8) oldString186));
+                } else {
+                    charSequence186 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(186, charSequence186);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F186': "+ unionIndex186));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema93(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex187 = (decoder.readIndex());
+        if (unionIndex187 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, null);
+        } else {
+            if (unionIndex187 == 1) {
+                Utf8 charSequence187;
+                Object oldString187 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(187);
+                if (oldString187 instanceof Utf8) {
+                    charSequence187 = (decoder).readString(((Utf8) oldString187));
+                } else {
+                    charSequence187 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(187, charSequence187);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F187': "+ unionIndex187));
+            }
+        }
+        int unionIndex188 = (decoder.readIndex());
+        if (unionIndex188 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, null);
+        } else {
+            if (unionIndex188 == 1) {
+                Utf8 charSequence188;
+                Object oldString188 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(188);
+                if (oldString188 instanceof Utf8) {
+                    charSequence188 = (decoder).readString(((Utf8) oldString188));
+                } else {
+                    charSequence188 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(188, charSequence188);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F188': "+ unionIndex188));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema94(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex189 = (decoder.readIndex());
+        if (unionIndex189 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, null);
+        } else {
+            if (unionIndex189 == 1) {
+                Utf8 charSequence189;
+                Object oldString189 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(189);
+                if (oldString189 instanceof Utf8) {
+                    charSequence189 = (decoder).readString(((Utf8) oldString189));
+                } else {
+                    charSequence189 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(189, charSequence189);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F189': "+ unionIndex189));
+            }
+        }
+        int unionIndex190 = (decoder.readIndex());
+        if (unionIndex190 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, null);
+        } else {
+            if (unionIndex190 == 1) {
+                Utf8 charSequence190;
+                Object oldString190 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(190);
+                if (oldString190 instanceof Utf8) {
+                    charSequence190 = (decoder).readString(((Utf8) oldString190));
+                } else {
+                    charSequence190 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(190, charSequence190);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F190': "+ unionIndex190));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema95(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex191 = (decoder.readIndex());
+        if (unionIndex191 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, null);
+        } else {
+            if (unionIndex191 == 1) {
+                Utf8 charSequence191;
+                Object oldString191 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(191);
+                if (oldString191 instanceof Utf8) {
+                    charSequence191 = (decoder).readString(((Utf8) oldString191));
+                } else {
+                    charSequence191 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(191, charSequence191);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F191': "+ unionIndex191));
+            }
+        }
+        int unionIndex192 = (decoder.readIndex());
+        if (unionIndex192 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, null);
+        } else {
+            if (unionIndex192 == 1) {
+                Utf8 charSequence192;
+                Object oldString192 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(192);
+                if (oldString192 instanceof Utf8) {
+                    charSequence192 = (decoder).readString(((Utf8) oldString192));
+                } else {
+                    charSequence192 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(192, charSequence192);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F192': "+ unionIndex192));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema96(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex193 = (decoder.readIndex());
+        if (unionIndex193 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, null);
+        } else {
+            if (unionIndex193 == 1) {
+                Utf8 charSequence193;
+                Object oldString193 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(193);
+                if (oldString193 instanceof Utf8) {
+                    charSequence193 = (decoder).readString(((Utf8) oldString193));
+                } else {
+                    charSequence193 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(193, charSequence193);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F193': "+ unionIndex193));
+            }
+        }
+        int unionIndex194 = (decoder.readIndex());
+        if (unionIndex194 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, null);
+        } else {
+            if (unionIndex194 == 1) {
+                Utf8 charSequence194;
+                Object oldString194 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(194);
+                if (oldString194 instanceof Utf8) {
+                    charSequence194 = (decoder).readString(((Utf8) oldString194));
+                } else {
+                    charSequence194 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(194, charSequence194);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F194': "+ unionIndex194));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema97(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex195 = (decoder.readIndex());
+        if (unionIndex195 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, null);
+        } else {
+            if (unionIndex195 == 1) {
+                Utf8 charSequence195;
+                Object oldString195 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(195);
+                if (oldString195 instanceof Utf8) {
+                    charSequence195 = (decoder).readString(((Utf8) oldString195));
+                } else {
+                    charSequence195 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(195, charSequence195);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F195': "+ unionIndex195));
+            }
+        }
+        int unionIndex196 = (decoder.readIndex());
+        if (unionIndex196 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, null);
+        } else {
+            if (unionIndex196 == 1) {
+                Utf8 charSequence196;
+                Object oldString196 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(196);
+                if (oldString196 instanceof Utf8) {
+                    charSequence196 = (decoder).readString(((Utf8) oldString196));
+                } else {
+                    charSequence196 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(196, charSequence196);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F196': "+ unionIndex196));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema98(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex197 = (decoder.readIndex());
+        if (unionIndex197 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, null);
+        } else {
+            if (unionIndex197 == 1) {
+                Utf8 charSequence197;
+                Object oldString197 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(197);
+                if (oldString197 instanceof Utf8) {
+                    charSequence197 = (decoder).readString(((Utf8) oldString197));
+                } else {
+                    charSequence197 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(197, charSequence197);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F197': "+ unionIndex197));
+            }
+        }
+        int unionIndex198 = (decoder.readIndex());
+        if (unionIndex198 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, null);
+        } else {
+            if (unionIndex198 == 1) {
+                Utf8 charSequence198;
+                Object oldString198 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(198);
+                if (oldString198 instanceof Utf8) {
+                    charSequence198 = (decoder).readString(((Utf8) oldString198));
+                } else {
+                    charSequence198 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(198, charSequence198);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F198': "+ unionIndex198));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema99(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex199 = (decoder.readIndex());
+        if (unionIndex199 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, null);
+        } else {
+            if (unionIndex199 == 1) {
+                Utf8 charSequence199;
+                Object oldString199 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(199);
+                if (oldString199 instanceof Utf8) {
+                    charSequence199 = (decoder).readString(((Utf8) oldString199));
+                } else {
+                    charSequence199 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(199, charSequence199);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F199': "+ unionIndex199));
+            }
+        }
+        int unionIndex200 = (decoder.readIndex());
+        if (unionIndex200 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, null);
+        } else {
+            if (unionIndex200 == 1) {
+                Utf8 charSequence200;
+                Object oldString200 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(200);
+                if (oldString200 instanceof Utf8) {
+                    charSequence200 = (decoder).readString(((Utf8) oldString200));
+                } else {
+                    charSequence200 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(200, charSequence200);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F200': "+ unionIndex200));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema100(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex201 = (decoder.readIndex());
+        if (unionIndex201 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, null);
+        } else {
+            if (unionIndex201 == 1) {
+                Utf8 charSequence201;
+                Object oldString201 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(201);
+                if (oldString201 instanceof Utf8) {
+                    charSequence201 = (decoder).readString(((Utf8) oldString201));
+                } else {
+                    charSequence201 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(201, charSequence201);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F201': "+ unionIndex201));
+            }
+        }
+        int unionIndex202 = (decoder.readIndex());
+        if (unionIndex202 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, null);
+        } else {
+            if (unionIndex202 == 1) {
+                Utf8 charSequence202;
+                Object oldString202 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(202);
+                if (oldString202 instanceof Utf8) {
+                    charSequence202 = (decoder).readString(((Utf8) oldString202));
+                } else {
+                    charSequence202 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(202, charSequence202);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F202': "+ unionIndex202));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema101(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex203 = (decoder.readIndex());
+        if (unionIndex203 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, null);
+        } else {
+            if (unionIndex203 == 1) {
+                Utf8 charSequence203;
+                Object oldString203 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(203);
+                if (oldString203 instanceof Utf8) {
+                    charSequence203 = (decoder).readString(((Utf8) oldString203));
+                } else {
+                    charSequence203 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(203, charSequence203);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F203': "+ unionIndex203));
+            }
+        }
+        int unionIndex204 = (decoder.readIndex());
+        if (unionIndex204 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, null);
+        } else {
+            if (unionIndex204 == 1) {
+                Utf8 charSequence204;
+                Object oldString204 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(204);
+                if (oldString204 instanceof Utf8) {
+                    charSequence204 = (decoder).readString(((Utf8) oldString204));
+                } else {
+                    charSequence204 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(204, charSequence204);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F204': "+ unionIndex204));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema102(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex205 = (decoder.readIndex());
+        if (unionIndex205 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, null);
+        } else {
+            if (unionIndex205 == 1) {
+                Utf8 charSequence205;
+                Object oldString205 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(205);
+                if (oldString205 instanceof Utf8) {
+                    charSequence205 = (decoder).readString(((Utf8) oldString205));
+                } else {
+                    charSequence205 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(205, charSequence205);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F205': "+ unionIndex205));
+            }
+        }
+        int unionIndex206 = (decoder.readIndex());
+        if (unionIndex206 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, null);
+        } else {
+            if (unionIndex206 == 1) {
+                Utf8 charSequence206;
+                Object oldString206 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(206);
+                if (oldString206 instanceof Utf8) {
+                    charSequence206 = (decoder).readString(((Utf8) oldString206));
+                } else {
+                    charSequence206 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(206, charSequence206);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F206': "+ unionIndex206));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema103(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex207 = (decoder.readIndex());
+        if (unionIndex207 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, null);
+        } else {
+            if (unionIndex207 == 1) {
+                Utf8 charSequence207;
+                Object oldString207 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(207);
+                if (oldString207 instanceof Utf8) {
+                    charSequence207 = (decoder).readString(((Utf8) oldString207));
+                } else {
+                    charSequence207 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(207, charSequence207);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F207': "+ unionIndex207));
+            }
+        }
+        int unionIndex208 = (decoder.readIndex());
+        if (unionIndex208 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, null);
+        } else {
+            if (unionIndex208 == 1) {
+                Utf8 charSequence208;
+                Object oldString208 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(208);
+                if (oldString208 instanceof Utf8) {
+                    charSequence208 = (decoder).readString(((Utf8) oldString208));
+                } else {
+                    charSequence208 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(208, charSequence208);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F208': "+ unionIndex208));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema104(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex209 = (decoder.readIndex());
+        if (unionIndex209 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, null);
+        } else {
+            if (unionIndex209 == 1) {
+                Utf8 charSequence209;
+                Object oldString209 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(209);
+                if (oldString209 instanceof Utf8) {
+                    charSequence209 = (decoder).readString(((Utf8) oldString209));
+                } else {
+                    charSequence209 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(209, charSequence209);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F209': "+ unionIndex209));
+            }
+        }
+        int unionIndex210 = (decoder.readIndex());
+        if (unionIndex210 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, null);
+        } else {
+            if (unionIndex210 == 1) {
+                Utf8 charSequence210;
+                Object oldString210 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(210);
+                if (oldString210 instanceof Utf8) {
+                    charSequence210 = (decoder).readString(((Utf8) oldString210));
+                } else {
+                    charSequence210 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(210, charSequence210);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F210': "+ unionIndex210));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema105(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex211 = (decoder.readIndex());
+        if (unionIndex211 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, null);
+        } else {
+            if (unionIndex211 == 1) {
+                Utf8 charSequence211;
+                Object oldString211 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(211);
+                if (oldString211 instanceof Utf8) {
+                    charSequence211 = (decoder).readString(((Utf8) oldString211));
+                } else {
+                    charSequence211 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(211, charSequence211);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F211': "+ unionIndex211));
+            }
+        }
+        int unionIndex212 = (decoder.readIndex());
+        if (unionIndex212 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, null);
+        } else {
+            if (unionIndex212 == 1) {
+                Utf8 charSequence212;
+                Object oldString212 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(212);
+                if (oldString212 instanceof Utf8) {
+                    charSequence212 = (decoder).readString(((Utf8) oldString212));
+                } else {
+                    charSequence212 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(212, charSequence212);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F212': "+ unionIndex212));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema106(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex213 = (decoder.readIndex());
+        if (unionIndex213 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, null);
+        } else {
+            if (unionIndex213 == 1) {
+                Utf8 charSequence213;
+                Object oldString213 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(213);
+                if (oldString213 instanceof Utf8) {
+                    charSequence213 = (decoder).readString(((Utf8) oldString213));
+                } else {
+                    charSequence213 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(213, charSequence213);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F213': "+ unionIndex213));
+            }
+        }
+        int unionIndex214 = (decoder.readIndex());
+        if (unionIndex214 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, null);
+        } else {
+            if (unionIndex214 == 1) {
+                Utf8 charSequence214;
+                Object oldString214 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(214);
+                if (oldString214 instanceof Utf8) {
+                    charSequence214 = (decoder).readString(((Utf8) oldString214));
+                } else {
+                    charSequence214 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(214, charSequence214);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F214': "+ unionIndex214));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema107(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex215 = (decoder.readIndex());
+        if (unionIndex215 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, null);
+        } else {
+            if (unionIndex215 == 1) {
+                Utf8 charSequence215;
+                Object oldString215 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(215);
+                if (oldString215 instanceof Utf8) {
+                    charSequence215 = (decoder).readString(((Utf8) oldString215));
+                } else {
+                    charSequence215 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(215, charSequence215);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F215': "+ unionIndex215));
+            }
+        }
+        int unionIndex216 = (decoder.readIndex());
+        if (unionIndex216 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, null);
+        } else {
+            if (unionIndex216 == 1) {
+                Utf8 charSequence216;
+                Object oldString216 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(216);
+                if (oldString216 instanceof Utf8) {
+                    charSequence216 = (decoder).readString(((Utf8) oldString216));
+                } else {
+                    charSequence216 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(216, charSequence216);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F216': "+ unionIndex216));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema108(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex217 = (decoder.readIndex());
+        if (unionIndex217 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, null);
+        } else {
+            if (unionIndex217 == 1) {
+                Utf8 charSequence217;
+                Object oldString217 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(217);
+                if (oldString217 instanceof Utf8) {
+                    charSequence217 = (decoder).readString(((Utf8) oldString217));
+                } else {
+                    charSequence217 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(217, charSequence217);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F217': "+ unionIndex217));
+            }
+        }
+        int unionIndex218 = (decoder.readIndex());
+        if (unionIndex218 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, null);
+        } else {
+            if (unionIndex218 == 1) {
+                Utf8 charSequence218;
+                Object oldString218 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(218);
+                if (oldString218 instanceof Utf8) {
+                    charSequence218 = (decoder).readString(((Utf8) oldString218));
+                } else {
+                    charSequence218 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(218, charSequence218);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F218': "+ unionIndex218));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema109(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex219 = (decoder.readIndex());
+        if (unionIndex219 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, null);
+        } else {
+            if (unionIndex219 == 1) {
+                Utf8 charSequence219;
+                Object oldString219 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(219);
+                if (oldString219 instanceof Utf8) {
+                    charSequence219 = (decoder).readString(((Utf8) oldString219));
+                } else {
+                    charSequence219 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(219, charSequence219);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F219': "+ unionIndex219));
+            }
+        }
+        int unionIndex220 = (decoder.readIndex());
+        if (unionIndex220 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, null);
+        } else {
+            if (unionIndex220 == 1) {
+                Utf8 charSequence220;
+                Object oldString220 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(220);
+                if (oldString220 instanceof Utf8) {
+                    charSequence220 = (decoder).readString(((Utf8) oldString220));
+                } else {
+                    charSequence220 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(220, charSequence220);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F220': "+ unionIndex220));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema110(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex221 = (decoder.readIndex());
+        if (unionIndex221 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, null);
+        } else {
+            if (unionIndex221 == 1) {
+                Utf8 charSequence221;
+                Object oldString221 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(221);
+                if (oldString221 instanceof Utf8) {
+                    charSequence221 = (decoder).readString(((Utf8) oldString221));
+                } else {
+                    charSequence221 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(221, charSequence221);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F221': "+ unionIndex221));
+            }
+        }
+        int unionIndex222 = (decoder.readIndex());
+        if (unionIndex222 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, null);
+        } else {
+            if (unionIndex222 == 1) {
+                Utf8 charSequence222;
+                Object oldString222 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(222);
+                if (oldString222 instanceof Utf8) {
+                    charSequence222 = (decoder).readString(((Utf8) oldString222));
+                } else {
+                    charSequence222 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(222, charSequence222);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F222': "+ unionIndex222));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema111(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex223 = (decoder.readIndex());
+        if (unionIndex223 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, null);
+        } else {
+            if (unionIndex223 == 1) {
+                Utf8 charSequence223;
+                Object oldString223 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(223);
+                if (oldString223 instanceof Utf8) {
+                    charSequence223 = (decoder).readString(((Utf8) oldString223));
+                } else {
+                    charSequence223 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(223, charSequence223);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F223': "+ unionIndex223));
+            }
+        }
+        int unionIndex224 = (decoder.readIndex());
+        if (unionIndex224 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, null);
+        } else {
+            if (unionIndex224 == 1) {
+                Utf8 charSequence224;
+                Object oldString224 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(224);
+                if (oldString224 instanceof Utf8) {
+                    charSequence224 = (decoder).readString(((Utf8) oldString224));
+                } else {
+                    charSequence224 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(224, charSequence224);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F224': "+ unionIndex224));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema112(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex225 = (decoder.readIndex());
+        if (unionIndex225 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, null);
+        } else {
+            if (unionIndex225 == 1) {
+                Utf8 charSequence225;
+                Object oldString225 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(225);
+                if (oldString225 instanceof Utf8) {
+                    charSequence225 = (decoder).readString(((Utf8) oldString225));
+                } else {
+                    charSequence225 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(225, charSequence225);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F225': "+ unionIndex225));
+            }
+        }
+        int unionIndex226 = (decoder.readIndex());
+        if (unionIndex226 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, null);
+        } else {
+            if (unionIndex226 == 1) {
+                Utf8 charSequence226;
+                Object oldString226 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(226);
+                if (oldString226 instanceof Utf8) {
+                    charSequence226 = (decoder).readString(((Utf8) oldString226));
+                } else {
+                    charSequence226 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(226, charSequence226);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F226': "+ unionIndex226));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema113(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex227 = (decoder.readIndex());
+        if (unionIndex227 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, null);
+        } else {
+            if (unionIndex227 == 1) {
+                Utf8 charSequence227;
+                Object oldString227 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(227);
+                if (oldString227 instanceof Utf8) {
+                    charSequence227 = (decoder).readString(((Utf8) oldString227));
+                } else {
+                    charSequence227 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(227, charSequence227);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F227': "+ unionIndex227));
+            }
+        }
+        int unionIndex228 = (decoder.readIndex());
+        if (unionIndex228 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, null);
+        } else {
+            if (unionIndex228 == 1) {
+                Utf8 charSequence228;
+                Object oldString228 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(228);
+                if (oldString228 instanceof Utf8) {
+                    charSequence228 = (decoder).readString(((Utf8) oldString228));
+                } else {
+                    charSequence228 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(228, charSequence228);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F228': "+ unionIndex228));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema114(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex229 = (decoder.readIndex());
+        if (unionIndex229 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, null);
+        } else {
+            if (unionIndex229 == 1) {
+                Utf8 charSequence229;
+                Object oldString229 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(229);
+                if (oldString229 instanceof Utf8) {
+                    charSequence229 = (decoder).readString(((Utf8) oldString229));
+                } else {
+                    charSequence229 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(229, charSequence229);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F229': "+ unionIndex229));
+            }
+        }
+        int unionIndex230 = (decoder.readIndex());
+        if (unionIndex230 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, null);
+        } else {
+            if (unionIndex230 == 1) {
+                Utf8 charSequence230;
+                Object oldString230 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(230);
+                if (oldString230 instanceof Utf8) {
+                    charSequence230 = (decoder).readString(((Utf8) oldString230));
+                } else {
+                    charSequence230 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(230, charSequence230);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F230': "+ unionIndex230));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema115(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex231 = (decoder.readIndex());
+        if (unionIndex231 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, null);
+        } else {
+            if (unionIndex231 == 1) {
+                Utf8 charSequence231;
+                Object oldString231 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(231);
+                if (oldString231 instanceof Utf8) {
+                    charSequence231 = (decoder).readString(((Utf8) oldString231));
+                } else {
+                    charSequence231 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(231, charSequence231);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F231': "+ unionIndex231));
+            }
+        }
+        int unionIndex232 = (decoder.readIndex());
+        if (unionIndex232 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, null);
+        } else {
+            if (unionIndex232 == 1) {
+                Utf8 charSequence232;
+                Object oldString232 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(232);
+                if (oldString232 instanceof Utf8) {
+                    charSequence232 = (decoder).readString(((Utf8) oldString232));
+                } else {
+                    charSequence232 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(232, charSequence232);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F232': "+ unionIndex232));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema116(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex233 = (decoder.readIndex());
+        if (unionIndex233 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, null);
+        } else {
+            if (unionIndex233 == 1) {
+                Utf8 charSequence233;
+                Object oldString233 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(233);
+                if (oldString233 instanceof Utf8) {
+                    charSequence233 = (decoder).readString(((Utf8) oldString233));
+                } else {
+                    charSequence233 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(233, charSequence233);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F233': "+ unionIndex233));
+            }
+        }
+        int unionIndex234 = (decoder.readIndex());
+        if (unionIndex234 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, null);
+        } else {
+            if (unionIndex234 == 1) {
+                Utf8 charSequence234;
+                Object oldString234 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(234);
+                if (oldString234 instanceof Utf8) {
+                    charSequence234 = (decoder).readString(((Utf8) oldString234));
+                } else {
+                    charSequence234 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(234, charSequence234);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F234': "+ unionIndex234));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema117(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex235 = (decoder.readIndex());
+        if (unionIndex235 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, null);
+        } else {
+            if (unionIndex235 == 1) {
+                Utf8 charSequence235;
+                Object oldString235 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(235);
+                if (oldString235 instanceof Utf8) {
+                    charSequence235 = (decoder).readString(((Utf8) oldString235));
+                } else {
+                    charSequence235 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(235, charSequence235);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F235': "+ unionIndex235));
+            }
+        }
+        int unionIndex236 = (decoder.readIndex());
+        if (unionIndex236 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, null);
+        } else {
+            if (unionIndex236 == 1) {
+                Utf8 charSequence236;
+                Object oldString236 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(236);
+                if (oldString236 instanceof Utf8) {
+                    charSequence236 = (decoder).readString(((Utf8) oldString236));
+                } else {
+                    charSequence236 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(236, charSequence236);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F236': "+ unionIndex236));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema118(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex237 = (decoder.readIndex());
+        if (unionIndex237 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, null);
+        } else {
+            if (unionIndex237 == 1) {
+                Utf8 charSequence237;
+                Object oldString237 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(237);
+                if (oldString237 instanceof Utf8) {
+                    charSequence237 = (decoder).readString(((Utf8) oldString237));
+                } else {
+                    charSequence237 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(237, charSequence237);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F237': "+ unionIndex237));
+            }
+        }
+        int unionIndex238 = (decoder.readIndex());
+        if (unionIndex238 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, null);
+        } else {
+            if (unionIndex238 == 1) {
+                Utf8 charSequence238;
+                Object oldString238 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(238);
+                if (oldString238 instanceof Utf8) {
+                    charSequence238 = (decoder).readString(((Utf8) oldString238));
+                } else {
+                    charSequence238 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(238, charSequence238);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F238': "+ unionIndex238));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema119(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex239 = (decoder.readIndex());
+        if (unionIndex239 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, null);
+        } else {
+            if (unionIndex239 == 1) {
+                Utf8 charSequence239;
+                Object oldString239 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(239);
+                if (oldString239 instanceof Utf8) {
+                    charSequence239 = (decoder).readString(((Utf8) oldString239));
+                } else {
+                    charSequence239 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(239, charSequence239);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F239': "+ unionIndex239));
+            }
+        }
+        int unionIndex240 = (decoder.readIndex());
+        if (unionIndex240 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, null);
+        } else {
+            if (unionIndex240 == 1) {
+                Utf8 charSequence240;
+                Object oldString240 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(240);
+                if (oldString240 instanceof Utf8) {
+                    charSequence240 = (decoder).readString(((Utf8) oldString240));
+                } else {
+                    charSequence240 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(240, charSequence240);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F240': "+ unionIndex240));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema120(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex241 = (decoder.readIndex());
+        if (unionIndex241 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, null);
+        } else {
+            if (unionIndex241 == 1) {
+                Utf8 charSequence241;
+                Object oldString241 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(241);
+                if (oldString241 instanceof Utf8) {
+                    charSequence241 = (decoder).readString(((Utf8) oldString241));
+                } else {
+                    charSequence241 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(241, charSequence241);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F241': "+ unionIndex241));
+            }
+        }
+        int unionIndex242 = (decoder.readIndex());
+        if (unionIndex242 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, null);
+        } else {
+            if (unionIndex242 == 1) {
+                Utf8 charSequence242;
+                Object oldString242 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(242);
+                if (oldString242 instanceof Utf8) {
+                    charSequence242 = (decoder).readString(((Utf8) oldString242));
+                } else {
+                    charSequence242 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(242, charSequence242);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F242': "+ unionIndex242));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema121(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex243 = (decoder.readIndex());
+        if (unionIndex243 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, null);
+        } else {
+            if (unionIndex243 == 1) {
+                Utf8 charSequence243;
+                Object oldString243 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(243);
+                if (oldString243 instanceof Utf8) {
+                    charSequence243 = (decoder).readString(((Utf8) oldString243));
+                } else {
+                    charSequence243 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(243, charSequence243);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F243': "+ unionIndex243));
+            }
+        }
+        int unionIndex244 = (decoder.readIndex());
+        if (unionIndex244 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, null);
+        } else {
+            if (unionIndex244 == 1) {
+                Utf8 charSequence244;
+                Object oldString244 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(244);
+                if (oldString244 instanceof Utf8) {
+                    charSequence244 = (decoder).readString(((Utf8) oldString244));
+                } else {
+                    charSequence244 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(244, charSequence244);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F244': "+ unionIndex244));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema122(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex245 = (decoder.readIndex());
+        if (unionIndex245 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, null);
+        } else {
+            if (unionIndex245 == 1) {
+                Utf8 charSequence245;
+                Object oldString245 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(245);
+                if (oldString245 instanceof Utf8) {
+                    charSequence245 = (decoder).readString(((Utf8) oldString245));
+                } else {
+                    charSequence245 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(245, charSequence245);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F245': "+ unionIndex245));
+            }
+        }
+        int unionIndex246 = (decoder.readIndex());
+        if (unionIndex246 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, null);
+        } else {
+            if (unionIndex246 == 1) {
+                Utf8 charSequence246;
+                Object oldString246 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(246);
+                if (oldString246 instanceof Utf8) {
+                    charSequence246 = (decoder).readString(((Utf8) oldString246));
+                } else {
+                    charSequence246 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(246, charSequence246);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F246': "+ unionIndex246));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema123(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex247 = (decoder.readIndex());
+        if (unionIndex247 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, null);
+        } else {
+            if (unionIndex247 == 1) {
+                Utf8 charSequence247;
+                Object oldString247 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(247);
+                if (oldString247 instanceof Utf8) {
+                    charSequence247 = (decoder).readString(((Utf8) oldString247));
+                } else {
+                    charSequence247 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(247, charSequence247);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F247': "+ unionIndex247));
+            }
+        }
+        int unionIndex248 = (decoder.readIndex());
+        if (unionIndex248 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, null);
+        } else {
+            if (unionIndex248 == 1) {
+                Utf8 charSequence248;
+                Object oldString248 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(248);
+                if (oldString248 instanceof Utf8) {
+                    charSequence248 = (decoder).readString(((Utf8) oldString248));
+                } else {
+                    charSequence248 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(248, charSequence248);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F248': "+ unionIndex248));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema124(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex249 = (decoder.readIndex());
+        if (unionIndex249 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, null);
+        } else {
+            if (unionIndex249 == 1) {
+                Utf8 charSequence249;
+                Object oldString249 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(249);
+                if (oldString249 instanceof Utf8) {
+                    charSequence249 = (decoder).readString(((Utf8) oldString249));
+                } else {
+                    charSequence249 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(249, charSequence249);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F249': "+ unionIndex249));
+            }
+        }
+        int unionIndex250 = (decoder.readIndex());
+        if (unionIndex250 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, null);
+        } else {
+            if (unionIndex250 == 1) {
+                Utf8 charSequence250;
+                Object oldString250 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(250);
+                if (oldString250 instanceof Utf8) {
+                    charSequence250 = (decoder).readString(((Utf8) oldString250));
+                } else {
+                    charSequence250 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(250, charSequence250);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F250': "+ unionIndex250));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema125(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex251 = (decoder.readIndex());
+        if (unionIndex251 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, null);
+        } else {
+            if (unionIndex251 == 1) {
+                Utf8 charSequence251;
+                Object oldString251 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(251);
+                if (oldString251 instanceof Utf8) {
+                    charSequence251 = (decoder).readString(((Utf8) oldString251));
+                } else {
+                    charSequence251 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(251, charSequence251);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F251': "+ unionIndex251));
+            }
+        }
+        int unionIndex252 = (decoder.readIndex());
+        if (unionIndex252 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, null);
+        } else {
+            if (unionIndex252 == 1) {
+                Utf8 charSequence252;
+                Object oldString252 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(252);
+                if (oldString252 instanceof Utf8) {
+                    charSequence252 = (decoder).readString(((Utf8) oldString252));
+                } else {
+                    charSequence252 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(252, charSequence252);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F252': "+ unionIndex252));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema126(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex253 = (decoder.readIndex());
+        if (unionIndex253 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, null);
+        } else {
+            if (unionIndex253 == 1) {
+                Utf8 charSequence253;
+                Object oldString253 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(253);
+                if (oldString253 instanceof Utf8) {
+                    charSequence253 = (decoder).readString(((Utf8) oldString253));
+                } else {
+                    charSequence253 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(253, charSequence253);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F253': "+ unionIndex253));
+            }
+        }
+        int unionIndex254 = (decoder.readIndex());
+        if (unionIndex254 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, null);
+        } else {
+            if (unionIndex254 == 1) {
+                Utf8 charSequence254;
+                Object oldString254 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(254);
+                if (oldString254 instanceof Utf8) {
+                    charSequence254 = (decoder).readString(((Utf8) oldString254));
+                } else {
+                    charSequence254 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(254, charSequence254);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F254': "+ unionIndex254));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema127(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex255 = (decoder.readIndex());
+        if (unionIndex255 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, null);
+        } else {
+            if (unionIndex255 == 1) {
+                Utf8 charSequence255;
+                Object oldString255 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(255);
+                if (oldString255 instanceof Utf8) {
+                    charSequence255 = (decoder).readString(((Utf8) oldString255));
+                } else {
+                    charSequence255 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(255, charSequence255);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F255': "+ unionIndex255));
+            }
+        }
+        int unionIndex256 = (decoder.readIndex());
+        if (unionIndex256 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, null);
+        } else {
+            if (unionIndex256 == 1) {
+                Utf8 charSequence256;
+                Object oldString256 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(256);
+                if (oldString256 instanceof Utf8) {
+                    charSequence256 = (decoder).readString(((Utf8) oldString256));
+                } else {
+                    charSequence256 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(256, charSequence256);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F256': "+ unionIndex256));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema128(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex257 = (decoder.readIndex());
+        if (unionIndex257 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, null);
+        } else {
+            if (unionIndex257 == 1) {
+                Utf8 charSequence257;
+                Object oldString257 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(257);
+                if (oldString257 instanceof Utf8) {
+                    charSequence257 = (decoder).readString(((Utf8) oldString257));
+                } else {
+                    charSequence257 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(257, charSequence257);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F257': "+ unionIndex257));
+            }
+        }
+        int unionIndex258 = (decoder.readIndex());
+        if (unionIndex258 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, null);
+        } else {
+            if (unionIndex258 == 1) {
+                Utf8 charSequence258;
+                Object oldString258 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(258);
+                if (oldString258 instanceof Utf8) {
+                    charSequence258 = (decoder).readString(((Utf8) oldString258));
+                } else {
+                    charSequence258 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(258, charSequence258);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F258': "+ unionIndex258));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema129(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex259 = (decoder.readIndex());
+        if (unionIndex259 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, null);
+        } else {
+            if (unionIndex259 == 1) {
+                Utf8 charSequence259;
+                Object oldString259 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(259);
+                if (oldString259 instanceof Utf8) {
+                    charSequence259 = (decoder).readString(((Utf8) oldString259));
+                } else {
+                    charSequence259 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(259, charSequence259);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F259': "+ unionIndex259));
+            }
+        }
+        int unionIndex260 = (decoder.readIndex());
+        if (unionIndex260 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, null);
+        } else {
+            if (unionIndex260 == 1) {
+                Utf8 charSequence260;
+                Object oldString260 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(260);
+                if (oldString260 instanceof Utf8) {
+                    charSequence260 = (decoder).readString(((Utf8) oldString260));
+                } else {
+                    charSequence260 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(260, charSequence260);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F260': "+ unionIndex260));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema130(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex261 = (decoder.readIndex());
+        if (unionIndex261 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, null);
+        } else {
+            if (unionIndex261 == 1) {
+                Utf8 charSequence261;
+                Object oldString261 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(261);
+                if (oldString261 instanceof Utf8) {
+                    charSequence261 = (decoder).readString(((Utf8) oldString261));
+                } else {
+                    charSequence261 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(261, charSequence261);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F261': "+ unionIndex261));
+            }
+        }
+        int unionIndex262 = (decoder.readIndex());
+        if (unionIndex262 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, null);
+        } else {
+            if (unionIndex262 == 1) {
+                Utf8 charSequence262;
+                Object oldString262 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(262);
+                if (oldString262 instanceof Utf8) {
+                    charSequence262 = (decoder).readString(((Utf8) oldString262));
+                } else {
+                    charSequence262 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(262, charSequence262);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F262': "+ unionIndex262));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema131(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex263 = (decoder.readIndex());
+        if (unionIndex263 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, null);
+        } else {
+            if (unionIndex263 == 1) {
+                Utf8 charSequence263;
+                Object oldString263 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(263);
+                if (oldString263 instanceof Utf8) {
+                    charSequence263 = (decoder).readString(((Utf8) oldString263));
+                } else {
+                    charSequence263 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(263, charSequence263);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F263': "+ unionIndex263));
+            }
+        }
+        int unionIndex264 = (decoder.readIndex());
+        if (unionIndex264 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, null);
+        } else {
+            if (unionIndex264 == 1) {
+                Utf8 charSequence264;
+                Object oldString264 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(264);
+                if (oldString264 instanceof Utf8) {
+                    charSequence264 = (decoder).readString(((Utf8) oldString264));
+                } else {
+                    charSequence264 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(264, charSequence264);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F264': "+ unionIndex264));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema132(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex265 = (decoder.readIndex());
+        if (unionIndex265 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, null);
+        } else {
+            if (unionIndex265 == 1) {
+                Utf8 charSequence265;
+                Object oldString265 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(265);
+                if (oldString265 instanceof Utf8) {
+                    charSequence265 = (decoder).readString(((Utf8) oldString265));
+                } else {
+                    charSequence265 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(265, charSequence265);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F265': "+ unionIndex265));
+            }
+        }
+        int unionIndex266 = (decoder.readIndex());
+        if (unionIndex266 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, null);
+        } else {
+            if (unionIndex266 == 1) {
+                Utf8 charSequence266;
+                Object oldString266 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(266);
+                if (oldString266 instanceof Utf8) {
+                    charSequence266 = (decoder).readString(((Utf8) oldString266));
+                } else {
+                    charSequence266 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(266, charSequence266);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F266': "+ unionIndex266));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema133(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex267 = (decoder.readIndex());
+        if (unionIndex267 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, null);
+        } else {
+            if (unionIndex267 == 1) {
+                Utf8 charSequence267;
+                Object oldString267 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(267);
+                if (oldString267 instanceof Utf8) {
+                    charSequence267 = (decoder).readString(((Utf8) oldString267));
+                } else {
+                    charSequence267 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(267, charSequence267);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F267': "+ unionIndex267));
+            }
+        }
+        int unionIndex268 = (decoder.readIndex());
+        if (unionIndex268 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, null);
+        } else {
+            if (unionIndex268 == 1) {
+                Utf8 charSequence268;
+                Object oldString268 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(268);
+                if (oldString268 instanceof Utf8) {
+                    charSequence268 = (decoder).readString(((Utf8) oldString268));
+                } else {
+                    charSequence268 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(268, charSequence268);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F268': "+ unionIndex268));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema134(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex269 = (decoder.readIndex());
+        if (unionIndex269 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, null);
+        } else {
+            if (unionIndex269 == 1) {
+                Utf8 charSequence269;
+                Object oldString269 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(269);
+                if (oldString269 instanceof Utf8) {
+                    charSequence269 = (decoder).readString(((Utf8) oldString269));
+                } else {
+                    charSequence269 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(269, charSequence269);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F269': "+ unionIndex269));
+            }
+        }
+        int unionIndex270 = (decoder.readIndex());
+        if (unionIndex270 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, null);
+        } else {
+            if (unionIndex270 == 1) {
+                Utf8 charSequence270;
+                Object oldString270 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(270);
+                if (oldString270 instanceof Utf8) {
+                    charSequence270 = (decoder).readString(((Utf8) oldString270));
+                } else {
+                    charSequence270 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(270, charSequence270);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F270': "+ unionIndex270));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema135(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex271 = (decoder.readIndex());
+        if (unionIndex271 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, null);
+        } else {
+            if (unionIndex271 == 1) {
+                Utf8 charSequence271;
+                Object oldString271 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(271);
+                if (oldString271 instanceof Utf8) {
+                    charSequence271 = (decoder).readString(((Utf8) oldString271));
+                } else {
+                    charSequence271 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(271, charSequence271);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F271': "+ unionIndex271));
+            }
+        }
+        int unionIndex272 = (decoder.readIndex());
+        if (unionIndex272 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, null);
+        } else {
+            if (unionIndex272 == 1) {
+                Utf8 charSequence272;
+                Object oldString272 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(272);
+                if (oldString272 instanceof Utf8) {
+                    charSequence272 = (decoder).readString(((Utf8) oldString272));
+                } else {
+                    charSequence272 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(272, charSequence272);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F272': "+ unionIndex272));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema136(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex273 = (decoder.readIndex());
+        if (unionIndex273 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, null);
+        } else {
+            if (unionIndex273 == 1) {
+                Utf8 charSequence273;
+                Object oldString273 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(273);
+                if (oldString273 instanceof Utf8) {
+                    charSequence273 = (decoder).readString(((Utf8) oldString273));
+                } else {
+                    charSequence273 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(273, charSequence273);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F273': "+ unionIndex273));
+            }
+        }
+        int unionIndex274 = (decoder.readIndex());
+        if (unionIndex274 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, null);
+        } else {
+            if (unionIndex274 == 1) {
+                Utf8 charSequence274;
+                Object oldString274 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(274);
+                if (oldString274 instanceof Utf8) {
+                    charSequence274 = (decoder).readString(((Utf8) oldString274));
+                } else {
+                    charSequence274 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(274, charSequence274);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F274': "+ unionIndex274));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema137(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex275 = (decoder.readIndex());
+        if (unionIndex275 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, null);
+        } else {
+            if (unionIndex275 == 1) {
+                Utf8 charSequence275;
+                Object oldString275 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(275);
+                if (oldString275 instanceof Utf8) {
+                    charSequence275 = (decoder).readString(((Utf8) oldString275));
+                } else {
+                    charSequence275 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(275, charSequence275);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F275': "+ unionIndex275));
+            }
+        }
+        int unionIndex276 = (decoder.readIndex());
+        if (unionIndex276 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, null);
+        } else {
+            if (unionIndex276 == 1) {
+                Utf8 charSequence276;
+                Object oldString276 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(276);
+                if (oldString276 instanceof Utf8) {
+                    charSequence276 = (decoder).readString(((Utf8) oldString276));
+                } else {
+                    charSequence276 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(276, charSequence276);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F276': "+ unionIndex276));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema138(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex277 = (decoder.readIndex());
+        if (unionIndex277 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, null);
+        } else {
+            if (unionIndex277 == 1) {
+                Utf8 charSequence277;
+                Object oldString277 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(277);
+                if (oldString277 instanceof Utf8) {
+                    charSequence277 = (decoder).readString(((Utf8) oldString277));
+                } else {
+                    charSequence277 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(277, charSequence277);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F277': "+ unionIndex277));
+            }
+        }
+        int unionIndex278 = (decoder.readIndex());
+        if (unionIndex278 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, null);
+        } else {
+            if (unionIndex278 == 1) {
+                Utf8 charSequence278;
+                Object oldString278 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(278);
+                if (oldString278 instanceof Utf8) {
+                    charSequence278 = (decoder).readString(((Utf8) oldString278));
+                } else {
+                    charSequence278 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(278, charSequence278);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F278': "+ unionIndex278));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema139(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex279 = (decoder.readIndex());
+        if (unionIndex279 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, null);
+        } else {
+            if (unionIndex279 == 1) {
+                Utf8 charSequence279;
+                Object oldString279 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(279);
+                if (oldString279 instanceof Utf8) {
+                    charSequence279 = (decoder).readString(((Utf8) oldString279));
+                } else {
+                    charSequence279 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(279, charSequence279);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F279': "+ unionIndex279));
+            }
+        }
+        int unionIndex280 = (decoder.readIndex());
+        if (unionIndex280 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, null);
+        } else {
+            if (unionIndex280 == 1) {
+                Utf8 charSequence280;
+                Object oldString280 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(280);
+                if (oldString280 instanceof Utf8) {
+                    charSequence280 = (decoder).readString(((Utf8) oldString280));
+                } else {
+                    charSequence280 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(280, charSequence280);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F280': "+ unionIndex280));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema140(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex281 = (decoder.readIndex());
+        if (unionIndex281 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, null);
+        } else {
+            if (unionIndex281 == 1) {
+                Utf8 charSequence281;
+                Object oldString281 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(281);
+                if (oldString281 instanceof Utf8) {
+                    charSequence281 = (decoder).readString(((Utf8) oldString281));
+                } else {
+                    charSequence281 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(281, charSequence281);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F281': "+ unionIndex281));
+            }
+        }
+        int unionIndex282 = (decoder.readIndex());
+        if (unionIndex282 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, null);
+        } else {
+            if (unionIndex282 == 1) {
+                Utf8 charSequence282;
+                Object oldString282 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(282);
+                if (oldString282 instanceof Utf8) {
+                    charSequence282 = (decoder).readString(((Utf8) oldString282));
+                } else {
+                    charSequence282 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(282, charSequence282);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F282': "+ unionIndex282));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema141(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex283 = (decoder.readIndex());
+        if (unionIndex283 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, null);
+        } else {
+            if (unionIndex283 == 1) {
+                Utf8 charSequence283;
+                Object oldString283 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(283);
+                if (oldString283 instanceof Utf8) {
+                    charSequence283 = (decoder).readString(((Utf8) oldString283));
+                } else {
+                    charSequence283 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(283, charSequence283);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F283': "+ unionIndex283));
+            }
+        }
+        int unionIndex284 = (decoder.readIndex());
+        if (unionIndex284 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, null);
+        } else {
+            if (unionIndex284 == 1) {
+                Utf8 charSequence284;
+                Object oldString284 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(284);
+                if (oldString284 instanceof Utf8) {
+                    charSequence284 = (decoder).readString(((Utf8) oldString284));
+                } else {
+                    charSequence284 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(284, charSequence284);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F284': "+ unionIndex284));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema142(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex285 = (decoder.readIndex());
+        if (unionIndex285 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, null);
+        } else {
+            if (unionIndex285 == 1) {
+                Utf8 charSequence285;
+                Object oldString285 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(285);
+                if (oldString285 instanceof Utf8) {
+                    charSequence285 = (decoder).readString(((Utf8) oldString285));
+                } else {
+                    charSequence285 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(285, charSequence285);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F285': "+ unionIndex285));
+            }
+        }
+        int unionIndex286 = (decoder.readIndex());
+        if (unionIndex286 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, null);
+        } else {
+            if (unionIndex286 == 1) {
+                Utf8 charSequence286;
+                Object oldString286 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(286);
+                if (oldString286 instanceof Utf8) {
+                    charSequence286 = (decoder).readString(((Utf8) oldString286));
+                } else {
+                    charSequence286 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(286, charSequence286);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F286': "+ unionIndex286));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema143(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex287 = (decoder.readIndex());
+        if (unionIndex287 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, null);
+        } else {
+            if (unionIndex287 == 1) {
+                Utf8 charSequence287;
+                Object oldString287 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(287);
+                if (oldString287 instanceof Utf8) {
+                    charSequence287 = (decoder).readString(((Utf8) oldString287));
+                } else {
+                    charSequence287 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(287, charSequence287);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F287': "+ unionIndex287));
+            }
+        }
+        int unionIndex288 = (decoder.readIndex());
+        if (unionIndex288 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, null);
+        } else {
+            if (unionIndex288 == 1) {
+                Utf8 charSequence288;
+                Object oldString288 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(288);
+                if (oldString288 instanceof Utf8) {
+                    charSequence288 = (decoder).readString(((Utf8) oldString288));
+                } else {
+                    charSequence288 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(288, charSequence288);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F288': "+ unionIndex288));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema144(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex289 = (decoder.readIndex());
+        if (unionIndex289 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, null);
+        } else {
+            if (unionIndex289 == 1) {
+                Utf8 charSequence289;
+                Object oldString289 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(289);
+                if (oldString289 instanceof Utf8) {
+                    charSequence289 = (decoder).readString(((Utf8) oldString289));
+                } else {
+                    charSequence289 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(289, charSequence289);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F289': "+ unionIndex289));
+            }
+        }
+        int unionIndex290 = (decoder.readIndex());
+        if (unionIndex290 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, null);
+        } else {
+            if (unionIndex290 == 1) {
+                Utf8 charSequence290;
+                Object oldString290 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(290);
+                if (oldString290 instanceof Utf8) {
+                    charSequence290 = (decoder).readString(((Utf8) oldString290));
+                } else {
+                    charSequence290 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(290, charSequence290);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F290': "+ unionIndex290));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema145(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex291 = (decoder.readIndex());
+        if (unionIndex291 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, null);
+        } else {
+            if (unionIndex291 == 1) {
+                Utf8 charSequence291;
+                Object oldString291 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(291);
+                if (oldString291 instanceof Utf8) {
+                    charSequence291 = (decoder).readString(((Utf8) oldString291));
+                } else {
+                    charSequence291 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(291, charSequence291);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F291': "+ unionIndex291));
+            }
+        }
+        int unionIndex292 = (decoder.readIndex());
+        if (unionIndex292 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, null);
+        } else {
+            if (unionIndex292 == 1) {
+                Utf8 charSequence292;
+                Object oldString292 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(292);
+                if (oldString292 instanceof Utf8) {
+                    charSequence292 = (decoder).readString(((Utf8) oldString292));
+                } else {
+                    charSequence292 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(292, charSequence292);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F292': "+ unionIndex292));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema146(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex293 = (decoder.readIndex());
+        if (unionIndex293 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, null);
+        } else {
+            if (unionIndex293 == 1) {
+                Utf8 charSequence293;
+                Object oldString293 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(293);
+                if (oldString293 instanceof Utf8) {
+                    charSequence293 = (decoder).readString(((Utf8) oldString293));
+                } else {
+                    charSequence293 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(293, charSequence293);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F293': "+ unionIndex293));
+            }
+        }
+        int unionIndex294 = (decoder.readIndex());
+        if (unionIndex294 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, null);
+        } else {
+            if (unionIndex294 == 1) {
+                Utf8 charSequence294;
+                Object oldString294 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(294);
+                if (oldString294 instanceof Utf8) {
+                    charSequence294 = (decoder).readString(((Utf8) oldString294));
+                } else {
+                    charSequence294 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(294, charSequence294);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F294': "+ unionIndex294));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema147(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex295 = (decoder.readIndex());
+        if (unionIndex295 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, null);
+        } else {
+            if (unionIndex295 == 1) {
+                Utf8 charSequence295;
+                Object oldString295 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(295);
+                if (oldString295 instanceof Utf8) {
+                    charSequence295 = (decoder).readString(((Utf8) oldString295));
+                } else {
+                    charSequence295 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(295, charSequence295);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F295': "+ unionIndex295));
+            }
+        }
+        int unionIndex296 = (decoder.readIndex());
+        if (unionIndex296 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, null);
+        } else {
+            if (unionIndex296 == 1) {
+                Utf8 charSequence296;
+                Object oldString296 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(296);
+                if (oldString296 instanceof Utf8) {
+                    charSequence296 = (decoder).readString(((Utf8) oldString296));
+                } else {
+                    charSequence296 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(296, charSequence296);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F296': "+ unionIndex296));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema148(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex297 = (decoder.readIndex());
+        if (unionIndex297 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, null);
+        } else {
+            if (unionIndex297 == 1) {
+                Utf8 charSequence297;
+                Object oldString297 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(297);
+                if (oldString297 instanceof Utf8) {
+                    charSequence297 = (decoder).readString(((Utf8) oldString297));
+                } else {
+                    charSequence297 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(297, charSequence297);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F297': "+ unionIndex297));
+            }
+        }
+        int unionIndex298 = (decoder.readIndex());
+        if (unionIndex298 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, null);
+        } else {
+            if (unionIndex298 == 1) {
+                Utf8 charSequence298;
+                Object oldString298 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(298);
+                if (oldString298 instanceof Utf8) {
+                    charSequence298 = (decoder).readString(((Utf8) oldString298));
+                } else {
+                    charSequence298 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(298, charSequence298);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F298': "+ unionIndex298));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema149(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex299 = (decoder.readIndex());
+        if (unionIndex299 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, null);
+        } else {
+            if (unionIndex299 == 1) {
+                Utf8 charSequence299;
+                Object oldString299 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(299);
+                if (oldString299 instanceof Utf8) {
+                    charSequence299 = (decoder).readString(((Utf8) oldString299));
+                } else {
+                    charSequence299 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(299, charSequence299);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F299': "+ unionIndex299));
+            }
+        }
+        int unionIndex300 = (decoder.readIndex());
+        if (unionIndex300 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, null);
+        } else {
+            if (unionIndex300 == 1) {
+                Utf8 charSequence300;
+                Object oldString300 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(300);
+                if (oldString300 instanceof Utf8) {
+                    charSequence300 = (decoder).readString(((Utf8) oldString300));
+                } else {
+                    charSequence300 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(300, charSequence300);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F300': "+ unionIndex300));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema150(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex301 = (decoder.readIndex());
+        if (unionIndex301 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, null);
+        } else {
+            if (unionIndex301 == 1) {
+                Utf8 charSequence301;
+                Object oldString301 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(301);
+                if (oldString301 instanceof Utf8) {
+                    charSequence301 = (decoder).readString(((Utf8) oldString301));
+                } else {
+                    charSequence301 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(301, charSequence301);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F301': "+ unionIndex301));
+            }
+        }
+        int unionIndex302 = (decoder.readIndex());
+        if (unionIndex302 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, null);
+        } else {
+            if (unionIndex302 == 1) {
+                Utf8 charSequence302;
+                Object oldString302 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(302);
+                if (oldString302 instanceof Utf8) {
+                    charSequence302 = (decoder).readString(((Utf8) oldString302));
+                } else {
+                    charSequence302 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(302, charSequence302);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F302': "+ unionIndex302));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema151(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex303 = (decoder.readIndex());
+        if (unionIndex303 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, null);
+        } else {
+            if (unionIndex303 == 1) {
+                Utf8 charSequence303;
+                Object oldString303 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(303);
+                if (oldString303 instanceof Utf8) {
+                    charSequence303 = (decoder).readString(((Utf8) oldString303));
+                } else {
+                    charSequence303 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(303, charSequence303);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F303': "+ unionIndex303));
+            }
+        }
+        int unionIndex304 = (decoder.readIndex());
+        if (unionIndex304 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, null);
+        } else {
+            if (unionIndex304 == 1) {
+                Utf8 charSequence304;
+                Object oldString304 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(304);
+                if (oldString304 instanceof Utf8) {
+                    charSequence304 = (decoder).readString(((Utf8) oldString304));
+                } else {
+                    charSequence304 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(304, charSequence304);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F304': "+ unionIndex304));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema152(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex305 = (decoder.readIndex());
+        if (unionIndex305 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, null);
+        } else {
+            if (unionIndex305 == 1) {
+                Utf8 charSequence305;
+                Object oldString305 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(305);
+                if (oldString305 instanceof Utf8) {
+                    charSequence305 = (decoder).readString(((Utf8) oldString305));
+                } else {
+                    charSequence305 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(305, charSequence305);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F305': "+ unionIndex305));
+            }
+        }
+        int unionIndex306 = (decoder.readIndex());
+        if (unionIndex306 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, null);
+        } else {
+            if (unionIndex306 == 1) {
+                Utf8 charSequence306;
+                Object oldString306 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(306);
+                if (oldString306 instanceof Utf8) {
+                    charSequence306 = (decoder).readString(((Utf8) oldString306));
+                } else {
+                    charSequence306 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(306, charSequence306);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F306': "+ unionIndex306));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema153(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex307 = (decoder.readIndex());
+        if (unionIndex307 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, null);
+        } else {
+            if (unionIndex307 == 1) {
+                Utf8 charSequence307;
+                Object oldString307 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(307);
+                if (oldString307 instanceof Utf8) {
+                    charSequence307 = (decoder).readString(((Utf8) oldString307));
+                } else {
+                    charSequence307 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(307, charSequence307);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F307': "+ unionIndex307));
+            }
+        }
+        int unionIndex308 = (decoder.readIndex());
+        if (unionIndex308 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, null);
+        } else {
+            if (unionIndex308 == 1) {
+                Utf8 charSequence308;
+                Object oldString308 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(308);
+                if (oldString308 instanceof Utf8) {
+                    charSequence308 = (decoder).readString(((Utf8) oldString308));
+                } else {
+                    charSequence308 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(308, charSequence308);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F308': "+ unionIndex308));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema154(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex309 = (decoder.readIndex());
+        if (unionIndex309 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, null);
+        } else {
+            if (unionIndex309 == 1) {
+                Utf8 charSequence309;
+                Object oldString309 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(309);
+                if (oldString309 instanceof Utf8) {
+                    charSequence309 = (decoder).readString(((Utf8) oldString309));
+                } else {
+                    charSequence309 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(309, charSequence309);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F309': "+ unionIndex309));
+            }
+        }
+        int unionIndex310 = (decoder.readIndex());
+        if (unionIndex310 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, null);
+        } else {
+            if (unionIndex310 == 1) {
+                Utf8 charSequence310;
+                Object oldString310 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(310);
+                if (oldString310 instanceof Utf8) {
+                    charSequence310 = (decoder).readString(((Utf8) oldString310));
+                } else {
+                    charSequence310 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(310, charSequence310);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F310': "+ unionIndex310));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema155(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex311 = (decoder.readIndex());
+        if (unionIndex311 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, null);
+        } else {
+            if (unionIndex311 == 1) {
+                Utf8 charSequence311;
+                Object oldString311 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(311);
+                if (oldString311 instanceof Utf8) {
+                    charSequence311 = (decoder).readString(((Utf8) oldString311));
+                } else {
+                    charSequence311 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(311, charSequence311);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F311': "+ unionIndex311));
+            }
+        }
+        int unionIndex312 = (decoder.readIndex());
+        if (unionIndex312 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, null);
+        } else {
+            if (unionIndex312 == 1) {
+                Utf8 charSequence312;
+                Object oldString312 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(312);
+                if (oldString312 instanceof Utf8) {
+                    charSequence312 = (decoder).readString(((Utf8) oldString312));
+                } else {
+                    charSequence312 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(312, charSequence312);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F312': "+ unionIndex312));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema156(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex313 = (decoder.readIndex());
+        if (unionIndex313 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, null);
+        } else {
+            if (unionIndex313 == 1) {
+                Utf8 charSequence313;
+                Object oldString313 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(313);
+                if (oldString313 instanceof Utf8) {
+                    charSequence313 = (decoder).readString(((Utf8) oldString313));
+                } else {
+                    charSequence313 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(313, charSequence313);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F313': "+ unionIndex313));
+            }
+        }
+        int unionIndex314 = (decoder.readIndex());
+        if (unionIndex314 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, null);
+        } else {
+            if (unionIndex314 == 1) {
+                Utf8 charSequence314;
+                Object oldString314 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(314);
+                if (oldString314 instanceof Utf8) {
+                    charSequence314 = (decoder).readString(((Utf8) oldString314));
+                } else {
+                    charSequence314 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(314, charSequence314);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F314': "+ unionIndex314));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema157(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex315 = (decoder.readIndex());
+        if (unionIndex315 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, null);
+        } else {
+            if (unionIndex315 == 1) {
+                Utf8 charSequence315;
+                Object oldString315 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(315);
+                if (oldString315 instanceof Utf8) {
+                    charSequence315 = (decoder).readString(((Utf8) oldString315));
+                } else {
+                    charSequence315 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(315, charSequence315);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F315': "+ unionIndex315));
+            }
+        }
+        int unionIndex316 = (decoder.readIndex());
+        if (unionIndex316 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, null);
+        } else {
+            if (unionIndex316 == 1) {
+                Utf8 charSequence316;
+                Object oldString316 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(316);
+                if (oldString316 instanceof Utf8) {
+                    charSequence316 = (decoder).readString(((Utf8) oldString316));
+                } else {
+                    charSequence316 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(316, charSequence316);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F316': "+ unionIndex316));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema158(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex317 = (decoder.readIndex());
+        if (unionIndex317 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, null);
+        } else {
+            if (unionIndex317 == 1) {
+                Utf8 charSequence317;
+                Object oldString317 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(317);
+                if (oldString317 instanceof Utf8) {
+                    charSequence317 = (decoder).readString(((Utf8) oldString317));
+                } else {
+                    charSequence317 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(317, charSequence317);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F317': "+ unionIndex317));
+            }
+        }
+        int unionIndex318 = (decoder.readIndex());
+        if (unionIndex318 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, null);
+        } else {
+            if (unionIndex318 == 1) {
+                Utf8 charSequence318;
+                Object oldString318 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(318);
+                if (oldString318 instanceof Utf8) {
+                    charSequence318 = (decoder).readString(((Utf8) oldString318));
+                } else {
+                    charSequence318 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(318, charSequence318);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F318': "+ unionIndex318));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema159(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex319 = (decoder.readIndex());
+        if (unionIndex319 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, null);
+        } else {
+            if (unionIndex319 == 1) {
+                Utf8 charSequence319;
+                Object oldString319 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(319);
+                if (oldString319 instanceof Utf8) {
+                    charSequence319 = (decoder).readString(((Utf8) oldString319));
+                } else {
+                    charSequence319 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(319, charSequence319);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F319': "+ unionIndex319));
+            }
+        }
+        int unionIndex320 = (decoder.readIndex());
+        if (unionIndex320 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, null);
+        } else {
+            if (unionIndex320 == 1) {
+                Utf8 charSequence320;
+                Object oldString320 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(320);
+                if (oldString320 instanceof Utf8) {
+                    charSequence320 = (decoder).readString(((Utf8) oldString320));
+                } else {
+                    charSequence320 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(320, charSequence320);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F320': "+ unionIndex320));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema160(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex321 = (decoder.readIndex());
+        if (unionIndex321 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, null);
+        } else {
+            if (unionIndex321 == 1) {
+                Utf8 charSequence321;
+                Object oldString321 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(321);
+                if (oldString321 instanceof Utf8) {
+                    charSequence321 = (decoder).readString(((Utf8) oldString321));
+                } else {
+                    charSequence321 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(321, charSequence321);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F321': "+ unionIndex321));
+            }
+        }
+        int unionIndex322 = (decoder.readIndex());
+        if (unionIndex322 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, null);
+        } else {
+            if (unionIndex322 == 1) {
+                Utf8 charSequence322;
+                Object oldString322 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(322);
+                if (oldString322 instanceof Utf8) {
+                    charSequence322 = (decoder).readString(((Utf8) oldString322));
+                } else {
+                    charSequence322 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(322, charSequence322);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F322': "+ unionIndex322));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema161(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex323 = (decoder.readIndex());
+        if (unionIndex323 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, null);
+        } else {
+            if (unionIndex323 == 1) {
+                Utf8 charSequence323;
+                Object oldString323 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(323);
+                if (oldString323 instanceof Utf8) {
+                    charSequence323 = (decoder).readString(((Utf8) oldString323));
+                } else {
+                    charSequence323 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(323, charSequence323);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F323': "+ unionIndex323));
+            }
+        }
+        int unionIndex324 = (decoder.readIndex());
+        if (unionIndex324 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, null);
+        } else {
+            if (unionIndex324 == 1) {
+                Utf8 charSequence324;
+                Object oldString324 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(324);
+                if (oldString324 instanceof Utf8) {
+                    charSequence324 = (decoder).readString(((Utf8) oldString324));
+                } else {
+                    charSequence324 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(324, charSequence324);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F324': "+ unionIndex324));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema162(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex325 = (decoder.readIndex());
+        if (unionIndex325 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, null);
+        } else {
+            if (unionIndex325 == 1) {
+                Utf8 charSequence325;
+                Object oldString325 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(325);
+                if (oldString325 instanceof Utf8) {
+                    charSequence325 = (decoder).readString(((Utf8) oldString325));
+                } else {
+                    charSequence325 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(325, charSequence325);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F325': "+ unionIndex325));
+            }
+        }
+        int unionIndex326 = (decoder.readIndex());
+        if (unionIndex326 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, null);
+        } else {
+            if (unionIndex326 == 1) {
+                Utf8 charSequence326;
+                Object oldString326 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(326);
+                if (oldString326 instanceof Utf8) {
+                    charSequence326 = (decoder).readString(((Utf8) oldString326));
+                } else {
+                    charSequence326 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(326, charSequence326);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F326': "+ unionIndex326));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema163(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex327 = (decoder.readIndex());
+        if (unionIndex327 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, null);
+        } else {
+            if (unionIndex327 == 1) {
+                Utf8 charSequence327;
+                Object oldString327 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(327);
+                if (oldString327 instanceof Utf8) {
+                    charSequence327 = (decoder).readString(((Utf8) oldString327));
+                } else {
+                    charSequence327 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(327, charSequence327);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F327': "+ unionIndex327));
+            }
+        }
+        int unionIndex328 = (decoder.readIndex());
+        if (unionIndex328 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, null);
+        } else {
+            if (unionIndex328 == 1) {
+                Utf8 charSequence328;
+                Object oldString328 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(328);
+                if (oldString328 instanceof Utf8) {
+                    charSequence328 = (decoder).readString(((Utf8) oldString328));
+                } else {
+                    charSequence328 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(328, charSequence328);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F328': "+ unionIndex328));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema164(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex329 = (decoder.readIndex());
+        if (unionIndex329 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, null);
+        } else {
+            if (unionIndex329 == 1) {
+                Utf8 charSequence329;
+                Object oldString329 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(329);
+                if (oldString329 instanceof Utf8) {
+                    charSequence329 = (decoder).readString(((Utf8) oldString329));
+                } else {
+                    charSequence329 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(329, charSequence329);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F329': "+ unionIndex329));
+            }
+        }
+        int unionIndex330 = (decoder.readIndex());
+        if (unionIndex330 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, null);
+        } else {
+            if (unionIndex330 == 1) {
+                Utf8 charSequence330;
+                Object oldString330 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(330);
+                if (oldString330 instanceof Utf8) {
+                    charSequence330 = (decoder).readString(((Utf8) oldString330));
+                } else {
+                    charSequence330 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(330, charSequence330);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F330': "+ unionIndex330));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema165(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex331 = (decoder.readIndex());
+        if (unionIndex331 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, null);
+        } else {
+            if (unionIndex331 == 1) {
+                Utf8 charSequence331;
+                Object oldString331 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(331);
+                if (oldString331 instanceof Utf8) {
+                    charSequence331 = (decoder).readString(((Utf8) oldString331));
+                } else {
+                    charSequence331 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(331, charSequence331);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F331': "+ unionIndex331));
+            }
+        }
+        int unionIndex332 = (decoder.readIndex());
+        if (unionIndex332 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, null);
+        } else {
+            if (unionIndex332 == 1) {
+                Utf8 charSequence332;
+                Object oldString332 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(332);
+                if (oldString332 instanceof Utf8) {
+                    charSequence332 = (decoder).readString(((Utf8) oldString332));
+                } else {
+                    charSequence332 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(332, charSequence332);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F332': "+ unionIndex332));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema166(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex333 = (decoder.readIndex());
+        if (unionIndex333 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, null);
+        } else {
+            if (unionIndex333 == 1) {
+                Utf8 charSequence333;
+                Object oldString333 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(333);
+                if (oldString333 instanceof Utf8) {
+                    charSequence333 = (decoder).readString(((Utf8) oldString333));
+                } else {
+                    charSequence333 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(333, charSequence333);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F333': "+ unionIndex333));
+            }
+        }
+        int unionIndex334 = (decoder.readIndex());
+        if (unionIndex334 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, null);
+        } else {
+            if (unionIndex334 == 1) {
+                Utf8 charSequence334;
+                Object oldString334 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(334);
+                if (oldString334 instanceof Utf8) {
+                    charSequence334 = (decoder).readString(((Utf8) oldString334));
+                } else {
+                    charSequence334 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(334, charSequence334);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F334': "+ unionIndex334));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema167(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex335 = (decoder.readIndex());
+        if (unionIndex335 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, null);
+        } else {
+            if (unionIndex335 == 1) {
+                Utf8 charSequence335;
+                Object oldString335 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(335);
+                if (oldString335 instanceof Utf8) {
+                    charSequence335 = (decoder).readString(((Utf8) oldString335));
+                } else {
+                    charSequence335 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(335, charSequence335);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F335': "+ unionIndex335));
+            }
+        }
+        int unionIndex336 = (decoder.readIndex());
+        if (unionIndex336 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, null);
+        } else {
+            if (unionIndex336 == 1) {
+                Utf8 charSequence336;
+                Object oldString336 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(336);
+                if (oldString336 instanceof Utf8) {
+                    charSequence336 = (decoder).readString(((Utf8) oldString336));
+                } else {
+                    charSequence336 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(336, charSequence336);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F336': "+ unionIndex336));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema168(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex337 = (decoder.readIndex());
+        if (unionIndex337 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, null);
+        } else {
+            if (unionIndex337 == 1) {
+                Utf8 charSequence337;
+                Object oldString337 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(337);
+                if (oldString337 instanceof Utf8) {
+                    charSequence337 = (decoder).readString(((Utf8) oldString337));
+                } else {
+                    charSequence337 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(337, charSequence337);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F337': "+ unionIndex337));
+            }
+        }
+        int unionIndex338 = (decoder.readIndex());
+        if (unionIndex338 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, null);
+        } else {
+            if (unionIndex338 == 1) {
+                Utf8 charSequence338;
+                Object oldString338 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(338);
+                if (oldString338 instanceof Utf8) {
+                    charSequence338 = (decoder).readString(((Utf8) oldString338));
+                } else {
+                    charSequence338 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(338, charSequence338);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F338': "+ unionIndex338));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema169(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex339 = (decoder.readIndex());
+        if (unionIndex339 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, null);
+        } else {
+            if (unionIndex339 == 1) {
+                Utf8 charSequence339;
+                Object oldString339 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(339);
+                if (oldString339 instanceof Utf8) {
+                    charSequence339 = (decoder).readString(((Utf8) oldString339));
+                } else {
+                    charSequence339 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(339, charSequence339);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F339': "+ unionIndex339));
+            }
+        }
+        int unionIndex340 = (decoder.readIndex());
+        if (unionIndex340 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, null);
+        } else {
+            if (unionIndex340 == 1) {
+                Utf8 charSequence340;
+                Object oldString340 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(340);
+                if (oldString340 instanceof Utf8) {
+                    charSequence340 = (decoder).readString(((Utf8) oldString340));
+                } else {
+                    charSequence340 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(340, charSequence340);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F340': "+ unionIndex340));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema170(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex341 = (decoder.readIndex());
+        if (unionIndex341 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, null);
+        } else {
+            if (unionIndex341 == 1) {
+                Utf8 charSequence341;
+                Object oldString341 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(341);
+                if (oldString341 instanceof Utf8) {
+                    charSequence341 = (decoder).readString(((Utf8) oldString341));
+                } else {
+                    charSequence341 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(341, charSequence341);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F341': "+ unionIndex341));
+            }
+        }
+        int unionIndex342 = (decoder.readIndex());
+        if (unionIndex342 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, null);
+        } else {
+            if (unionIndex342 == 1) {
+                Utf8 charSequence342;
+                Object oldString342 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(342);
+                if (oldString342 instanceof Utf8) {
+                    charSequence342 = (decoder).readString(((Utf8) oldString342));
+                } else {
+                    charSequence342 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(342, charSequence342);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F342': "+ unionIndex342));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema171(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex343 = (decoder.readIndex());
+        if (unionIndex343 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, null);
+        } else {
+            if (unionIndex343 == 1) {
+                Utf8 charSequence343;
+                Object oldString343 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(343);
+                if (oldString343 instanceof Utf8) {
+                    charSequence343 = (decoder).readString(((Utf8) oldString343));
+                } else {
+                    charSequence343 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(343, charSequence343);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F343': "+ unionIndex343));
+            }
+        }
+        int unionIndex344 = (decoder.readIndex());
+        if (unionIndex344 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, null);
+        } else {
+            if (unionIndex344 == 1) {
+                Utf8 charSequence344;
+                Object oldString344 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(344);
+                if (oldString344 instanceof Utf8) {
+                    charSequence344 = (decoder).readString(((Utf8) oldString344));
+                } else {
+                    charSequence344 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(344, charSequence344);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F344': "+ unionIndex344));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema172(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex345 = (decoder.readIndex());
+        if (unionIndex345 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, null);
+        } else {
+            if (unionIndex345 == 1) {
+                Utf8 charSequence345;
+                Object oldString345 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(345);
+                if (oldString345 instanceof Utf8) {
+                    charSequence345 = (decoder).readString(((Utf8) oldString345));
+                } else {
+                    charSequence345 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(345, charSequence345);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F345': "+ unionIndex345));
+            }
+        }
+        int unionIndex346 = (decoder.readIndex());
+        if (unionIndex346 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, null);
+        } else {
+            if (unionIndex346 == 1) {
+                Utf8 charSequence346;
+                Object oldString346 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(346);
+                if (oldString346 instanceof Utf8) {
+                    charSequence346 = (decoder).readString(((Utf8) oldString346));
+                } else {
+                    charSequence346 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(346, charSequence346);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F346': "+ unionIndex346));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema173(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex347 = (decoder.readIndex());
+        if (unionIndex347 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, null);
+        } else {
+            if (unionIndex347 == 1) {
+                Utf8 charSequence347;
+                Object oldString347 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(347);
+                if (oldString347 instanceof Utf8) {
+                    charSequence347 = (decoder).readString(((Utf8) oldString347));
+                } else {
+                    charSequence347 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(347, charSequence347);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F347': "+ unionIndex347));
+            }
+        }
+        int unionIndex348 = (decoder.readIndex());
+        if (unionIndex348 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, null);
+        } else {
+            if (unionIndex348 == 1) {
+                Utf8 charSequence348;
+                Object oldString348 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(348);
+                if (oldString348 instanceof Utf8) {
+                    charSequence348 = (decoder).readString(((Utf8) oldString348));
+                } else {
+                    charSequence348 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(348, charSequence348);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F348': "+ unionIndex348));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema174(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex349 = (decoder.readIndex());
+        if (unionIndex349 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, null);
+        } else {
+            if (unionIndex349 == 1) {
+                Utf8 charSequence349;
+                Object oldString349 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(349);
+                if (oldString349 instanceof Utf8) {
+                    charSequence349 = (decoder).readString(((Utf8) oldString349));
+                } else {
+                    charSequence349 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(349, charSequence349);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F349': "+ unionIndex349));
+            }
+        }
+        int unionIndex350 = (decoder.readIndex());
+        if (unionIndex350 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, null);
+        } else {
+            if (unionIndex350 == 1) {
+                Utf8 charSequence350;
+                Object oldString350 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(350);
+                if (oldString350 instanceof Utf8) {
+                    charSequence350 = (decoder).readString(((Utf8) oldString350));
+                } else {
+                    charSequence350 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(350, charSequence350);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F350': "+ unionIndex350));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema175(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex351 = (decoder.readIndex());
+        if (unionIndex351 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, null);
+        } else {
+            if (unionIndex351 == 1) {
+                Utf8 charSequence351;
+                Object oldString351 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(351);
+                if (oldString351 instanceof Utf8) {
+                    charSequence351 = (decoder).readString(((Utf8) oldString351));
+                } else {
+                    charSequence351 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(351, charSequence351);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F351': "+ unionIndex351));
+            }
+        }
+        int unionIndex352 = (decoder.readIndex());
+        if (unionIndex352 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, null);
+        } else {
+            if (unionIndex352 == 1) {
+                Utf8 charSequence352;
+                Object oldString352 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(352);
+                if (oldString352 instanceof Utf8) {
+                    charSequence352 = (decoder).readString(((Utf8) oldString352));
+                } else {
+                    charSequence352 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(352, charSequence352);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F352': "+ unionIndex352));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema176(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex353 = (decoder.readIndex());
+        if (unionIndex353 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, null);
+        } else {
+            if (unionIndex353 == 1) {
+                Utf8 charSequence353;
+                Object oldString353 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(353);
+                if (oldString353 instanceof Utf8) {
+                    charSequence353 = (decoder).readString(((Utf8) oldString353));
+                } else {
+                    charSequence353 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(353, charSequence353);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F353': "+ unionIndex353));
+            }
+        }
+        int unionIndex354 = (decoder.readIndex());
+        if (unionIndex354 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, null);
+        } else {
+            if (unionIndex354 == 1) {
+                Utf8 charSequence354;
+                Object oldString354 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(354);
+                if (oldString354 instanceof Utf8) {
+                    charSequence354 = (decoder).readString(((Utf8) oldString354));
+                } else {
+                    charSequence354 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(354, charSequence354);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F354': "+ unionIndex354));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema177(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex355 = (decoder.readIndex());
+        if (unionIndex355 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, null);
+        } else {
+            if (unionIndex355 == 1) {
+                Utf8 charSequence355;
+                Object oldString355 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(355);
+                if (oldString355 instanceof Utf8) {
+                    charSequence355 = (decoder).readString(((Utf8) oldString355));
+                } else {
+                    charSequence355 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(355, charSequence355);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F355': "+ unionIndex355));
+            }
+        }
+        int unionIndex356 = (decoder.readIndex());
+        if (unionIndex356 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, null);
+        } else {
+            if (unionIndex356 == 1) {
+                Utf8 charSequence356;
+                Object oldString356 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(356);
+                if (oldString356 instanceof Utf8) {
+                    charSequence356 = (decoder).readString(((Utf8) oldString356));
+                } else {
+                    charSequence356 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(356, charSequence356);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F356': "+ unionIndex356));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema178(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex357 = (decoder.readIndex());
+        if (unionIndex357 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, null);
+        } else {
+            if (unionIndex357 == 1) {
+                Utf8 charSequence357;
+                Object oldString357 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(357);
+                if (oldString357 instanceof Utf8) {
+                    charSequence357 = (decoder).readString(((Utf8) oldString357));
+                } else {
+                    charSequence357 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(357, charSequence357);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F357': "+ unionIndex357));
+            }
+        }
+        int unionIndex358 = (decoder.readIndex());
+        if (unionIndex358 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, null);
+        } else {
+            if (unionIndex358 == 1) {
+                Utf8 charSequence358;
+                Object oldString358 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(358);
+                if (oldString358 instanceof Utf8) {
+                    charSequence358 = (decoder).readString(((Utf8) oldString358));
+                } else {
+                    charSequence358 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(358, charSequence358);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F358': "+ unionIndex358));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema179(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex359 = (decoder.readIndex());
+        if (unionIndex359 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, null);
+        } else {
+            if (unionIndex359 == 1) {
+                Utf8 charSequence359;
+                Object oldString359 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(359);
+                if (oldString359 instanceof Utf8) {
+                    charSequence359 = (decoder).readString(((Utf8) oldString359));
+                } else {
+                    charSequence359 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(359, charSequence359);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F359': "+ unionIndex359));
+            }
+        }
+        int unionIndex360 = (decoder.readIndex());
+        if (unionIndex360 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, null);
+        } else {
+            if (unionIndex360 == 1) {
+                Utf8 charSequence360;
+                Object oldString360 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(360);
+                if (oldString360 instanceof Utf8) {
+                    charSequence360 = (decoder).readString(((Utf8) oldString360));
+                } else {
+                    charSequence360 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(360, charSequence360);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F360': "+ unionIndex360));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema180(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex361 = (decoder.readIndex());
+        if (unionIndex361 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, null);
+        } else {
+            if (unionIndex361 == 1) {
+                Utf8 charSequence361;
+                Object oldString361 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(361);
+                if (oldString361 instanceof Utf8) {
+                    charSequence361 = (decoder).readString(((Utf8) oldString361));
+                } else {
+                    charSequence361 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(361, charSequence361);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F361': "+ unionIndex361));
+            }
+        }
+        int unionIndex362 = (decoder.readIndex());
+        if (unionIndex362 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, null);
+        } else {
+            if (unionIndex362 == 1) {
+                Utf8 charSequence362;
+                Object oldString362 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(362);
+                if (oldString362 instanceof Utf8) {
+                    charSequence362 = (decoder).readString(((Utf8) oldString362));
+                } else {
+                    charSequence362 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(362, charSequence362);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F362': "+ unionIndex362));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema181(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex363 = (decoder.readIndex());
+        if (unionIndex363 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, null);
+        } else {
+            if (unionIndex363 == 1) {
+                Utf8 charSequence363;
+                Object oldString363 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(363);
+                if (oldString363 instanceof Utf8) {
+                    charSequence363 = (decoder).readString(((Utf8) oldString363));
+                } else {
+                    charSequence363 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(363, charSequence363);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F363': "+ unionIndex363));
+            }
+        }
+        int unionIndex364 = (decoder.readIndex());
+        if (unionIndex364 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, null);
+        } else {
+            if (unionIndex364 == 1) {
+                Utf8 charSequence364;
+                Object oldString364 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(364);
+                if (oldString364 instanceof Utf8) {
+                    charSequence364 = (decoder).readString(((Utf8) oldString364));
+                } else {
+                    charSequence364 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(364, charSequence364);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F364': "+ unionIndex364));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema182(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex365 = (decoder.readIndex());
+        if (unionIndex365 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, null);
+        } else {
+            if (unionIndex365 == 1) {
+                Utf8 charSequence365;
+                Object oldString365 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(365);
+                if (oldString365 instanceof Utf8) {
+                    charSequence365 = (decoder).readString(((Utf8) oldString365));
+                } else {
+                    charSequence365 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(365, charSequence365);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F365': "+ unionIndex365));
+            }
+        }
+        int unionIndex366 = (decoder.readIndex());
+        if (unionIndex366 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, null);
+        } else {
+            if (unionIndex366 == 1) {
+                Utf8 charSequence366;
+                Object oldString366 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(366);
+                if (oldString366 instanceof Utf8) {
+                    charSequence366 = (decoder).readString(((Utf8) oldString366));
+                } else {
+                    charSequence366 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(366, charSequence366);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F366': "+ unionIndex366));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema183(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex367 = (decoder.readIndex());
+        if (unionIndex367 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, null);
+        } else {
+            if (unionIndex367 == 1) {
+                Utf8 charSequence367;
+                Object oldString367 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(367);
+                if (oldString367 instanceof Utf8) {
+                    charSequence367 = (decoder).readString(((Utf8) oldString367));
+                } else {
+                    charSequence367 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(367, charSequence367);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F367': "+ unionIndex367));
+            }
+        }
+        int unionIndex368 = (decoder.readIndex());
+        if (unionIndex368 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, null);
+        } else {
+            if (unionIndex368 == 1) {
+                Utf8 charSequence368;
+                Object oldString368 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(368);
+                if (oldString368 instanceof Utf8) {
+                    charSequence368 = (decoder).readString(((Utf8) oldString368));
+                } else {
+                    charSequence368 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(368, charSequence368);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F368': "+ unionIndex368));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema184(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex369 = (decoder.readIndex());
+        if (unionIndex369 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, null);
+        } else {
+            if (unionIndex369 == 1) {
+                Utf8 charSequence369;
+                Object oldString369 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(369);
+                if (oldString369 instanceof Utf8) {
+                    charSequence369 = (decoder).readString(((Utf8) oldString369));
+                } else {
+                    charSequence369 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(369, charSequence369);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F369': "+ unionIndex369));
+            }
+        }
+        int unionIndex370 = (decoder.readIndex());
+        if (unionIndex370 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, null);
+        } else {
+            if (unionIndex370 == 1) {
+                Utf8 charSequence370;
+                Object oldString370 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(370);
+                if (oldString370 instanceof Utf8) {
+                    charSequence370 = (decoder).readString(((Utf8) oldString370));
+                } else {
+                    charSequence370 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(370, charSequence370);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F370': "+ unionIndex370));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema185(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex371 = (decoder.readIndex());
+        if (unionIndex371 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, null);
+        } else {
+            if (unionIndex371 == 1) {
+                Utf8 charSequence371;
+                Object oldString371 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(371);
+                if (oldString371 instanceof Utf8) {
+                    charSequence371 = (decoder).readString(((Utf8) oldString371));
+                } else {
+                    charSequence371 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(371, charSequence371);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F371': "+ unionIndex371));
+            }
+        }
+        int unionIndex372 = (decoder.readIndex());
+        if (unionIndex372 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, null);
+        } else {
+            if (unionIndex372 == 1) {
+                Utf8 charSequence372;
+                Object oldString372 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(372);
+                if (oldString372 instanceof Utf8) {
+                    charSequence372 = (decoder).readString(((Utf8) oldString372));
+                } else {
+                    charSequence372 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(372, charSequence372);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F372': "+ unionIndex372));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema186(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex373 = (decoder.readIndex());
+        if (unionIndex373 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, null);
+        } else {
+            if (unionIndex373 == 1) {
+                Utf8 charSequence373;
+                Object oldString373 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(373);
+                if (oldString373 instanceof Utf8) {
+                    charSequence373 = (decoder).readString(((Utf8) oldString373));
+                } else {
+                    charSequence373 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(373, charSequence373);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F373': "+ unionIndex373));
+            }
+        }
+        int unionIndex374 = (decoder.readIndex());
+        if (unionIndex374 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, null);
+        } else {
+            if (unionIndex374 == 1) {
+                Utf8 charSequence374;
+                Object oldString374 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(374);
+                if (oldString374 instanceof Utf8) {
+                    charSequence374 = (decoder).readString(((Utf8) oldString374));
+                } else {
+                    charSequence374 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(374, charSequence374);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F374': "+ unionIndex374));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema187(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex375 = (decoder.readIndex());
+        if (unionIndex375 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, null);
+        } else {
+            if (unionIndex375 == 1) {
+                Utf8 charSequence375;
+                Object oldString375 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(375);
+                if (oldString375 instanceof Utf8) {
+                    charSequence375 = (decoder).readString(((Utf8) oldString375));
+                } else {
+                    charSequence375 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(375, charSequence375);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F375': "+ unionIndex375));
+            }
+        }
+        int unionIndex376 = (decoder.readIndex());
+        if (unionIndex376 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, null);
+        } else {
+            if (unionIndex376 == 1) {
+                Utf8 charSequence376;
+                Object oldString376 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(376);
+                if (oldString376 instanceof Utf8) {
+                    charSequence376 = (decoder).readString(((Utf8) oldString376));
+                } else {
+                    charSequence376 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(376, charSequence376);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F376': "+ unionIndex376));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema188(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex377 = (decoder.readIndex());
+        if (unionIndex377 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, null);
+        } else {
+            if (unionIndex377 == 1) {
+                Utf8 charSequence377;
+                Object oldString377 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(377);
+                if (oldString377 instanceof Utf8) {
+                    charSequence377 = (decoder).readString(((Utf8) oldString377));
+                } else {
+                    charSequence377 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(377, charSequence377);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F377': "+ unionIndex377));
+            }
+        }
+        int unionIndex378 = (decoder.readIndex());
+        if (unionIndex378 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, null);
+        } else {
+            if (unionIndex378 == 1) {
+                Utf8 charSequence378;
+                Object oldString378 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(378);
+                if (oldString378 instanceof Utf8) {
+                    charSequence378 = (decoder).readString(((Utf8) oldString378));
+                } else {
+                    charSequence378 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(378, charSequence378);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F378': "+ unionIndex378));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema189(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex379 = (decoder.readIndex());
+        if (unionIndex379 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, null);
+        } else {
+            if (unionIndex379 == 1) {
+                Utf8 charSequence379;
+                Object oldString379 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(379);
+                if (oldString379 instanceof Utf8) {
+                    charSequence379 = (decoder).readString(((Utf8) oldString379));
+                } else {
+                    charSequence379 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(379, charSequence379);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F379': "+ unionIndex379));
+            }
+        }
+        int unionIndex380 = (decoder.readIndex());
+        if (unionIndex380 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, null);
+        } else {
+            if (unionIndex380 == 1) {
+                Utf8 charSequence380;
+                Object oldString380 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(380);
+                if (oldString380 instanceof Utf8) {
+                    charSequence380 = (decoder).readString(((Utf8) oldString380));
+                } else {
+                    charSequence380 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(380, charSequence380);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F380': "+ unionIndex380));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema190(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex381 = (decoder.readIndex());
+        if (unionIndex381 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, null);
+        } else {
+            if (unionIndex381 == 1) {
+                Utf8 charSequence381;
+                Object oldString381 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(381);
+                if (oldString381 instanceof Utf8) {
+                    charSequence381 = (decoder).readString(((Utf8) oldString381));
+                } else {
+                    charSequence381 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(381, charSequence381);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F381': "+ unionIndex381));
+            }
+        }
+        int unionIndex382 = (decoder.readIndex());
+        if (unionIndex382 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, null);
+        } else {
+            if (unionIndex382 == 1) {
+                Utf8 charSequence382;
+                Object oldString382 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(382);
+                if (oldString382 instanceof Utf8) {
+                    charSequence382 = (decoder).readString(((Utf8) oldString382));
+                } else {
+                    charSequence382 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(382, charSequence382);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F382': "+ unionIndex382));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema191(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex383 = (decoder.readIndex());
+        if (unionIndex383 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, null);
+        } else {
+            if (unionIndex383 == 1) {
+                Utf8 charSequence383;
+                Object oldString383 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(383);
+                if (oldString383 instanceof Utf8) {
+                    charSequence383 = (decoder).readString(((Utf8) oldString383));
+                } else {
+                    charSequence383 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(383, charSequence383);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F383': "+ unionIndex383));
+            }
+        }
+        int unionIndex384 = (decoder.readIndex());
+        if (unionIndex384 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, null);
+        } else {
+            if (unionIndex384 == 1) {
+                Utf8 charSequence384;
+                Object oldString384 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(384);
+                if (oldString384 instanceof Utf8) {
+                    charSequence384 = (decoder).readString(((Utf8) oldString384));
+                } else {
+                    charSequence384 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(384, charSequence384);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F384': "+ unionIndex384));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema192(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex385 = (decoder.readIndex());
+        if (unionIndex385 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, null);
+        } else {
+            if (unionIndex385 == 1) {
+                Utf8 charSequence385;
+                Object oldString385 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(385);
+                if (oldString385 instanceof Utf8) {
+                    charSequence385 = (decoder).readString(((Utf8) oldString385));
+                } else {
+                    charSequence385 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(385, charSequence385);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F385': "+ unionIndex385));
+            }
+        }
+        int unionIndex386 = (decoder.readIndex());
+        if (unionIndex386 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, null);
+        } else {
+            if (unionIndex386 == 1) {
+                Utf8 charSequence386;
+                Object oldString386 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(386);
+                if (oldString386 instanceof Utf8) {
+                    charSequence386 = (decoder).readString(((Utf8) oldString386));
+                } else {
+                    charSequence386 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(386, charSequence386);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F386': "+ unionIndex386));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema193(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex387 = (decoder.readIndex());
+        if (unionIndex387 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, null);
+        } else {
+            if (unionIndex387 == 1) {
+                Utf8 charSequence387;
+                Object oldString387 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(387);
+                if (oldString387 instanceof Utf8) {
+                    charSequence387 = (decoder).readString(((Utf8) oldString387));
+                } else {
+                    charSequence387 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(387, charSequence387);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F387': "+ unionIndex387));
+            }
+        }
+        int unionIndex388 = (decoder.readIndex());
+        if (unionIndex388 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, null);
+        } else {
+            if (unionIndex388 == 1) {
+                Utf8 charSequence388;
+                Object oldString388 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(388);
+                if (oldString388 instanceof Utf8) {
+                    charSequence388 = (decoder).readString(((Utf8) oldString388));
+                } else {
+                    charSequence388 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(388, charSequence388);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F388': "+ unionIndex388));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema194(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex389 = (decoder.readIndex());
+        if (unionIndex389 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, null);
+        } else {
+            if (unionIndex389 == 1) {
+                Utf8 charSequence389;
+                Object oldString389 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(389);
+                if (oldString389 instanceof Utf8) {
+                    charSequence389 = (decoder).readString(((Utf8) oldString389));
+                } else {
+                    charSequence389 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(389, charSequence389);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F389': "+ unionIndex389));
+            }
+        }
+        int unionIndex390 = (decoder.readIndex());
+        if (unionIndex390 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, null);
+        } else {
+            if (unionIndex390 == 1) {
+                Utf8 charSequence390;
+                Object oldString390 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(390);
+                if (oldString390 instanceof Utf8) {
+                    charSequence390 = (decoder).readString(((Utf8) oldString390));
+                } else {
+                    charSequence390 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(390, charSequence390);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F390': "+ unionIndex390));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema195(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex391 = (decoder.readIndex());
+        if (unionIndex391 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, null);
+        } else {
+            if (unionIndex391 == 1) {
+                Utf8 charSequence391;
+                Object oldString391 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(391);
+                if (oldString391 instanceof Utf8) {
+                    charSequence391 = (decoder).readString(((Utf8) oldString391));
+                } else {
+                    charSequence391 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(391, charSequence391);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F391': "+ unionIndex391));
+            }
+        }
+        int unionIndex392 = (decoder.readIndex());
+        if (unionIndex392 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, null);
+        } else {
+            if (unionIndex392 == 1) {
+                Utf8 charSequence392;
+                Object oldString392 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(392);
+                if (oldString392 instanceof Utf8) {
+                    charSequence392 = (decoder).readString(((Utf8) oldString392));
+                } else {
+                    charSequence392 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(392, charSequence392);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F392': "+ unionIndex392));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema196(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex393 = (decoder.readIndex());
+        if (unionIndex393 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, null);
+        } else {
+            if (unionIndex393 == 1) {
+                Utf8 charSequence393;
+                Object oldString393 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(393);
+                if (oldString393 instanceof Utf8) {
+                    charSequence393 = (decoder).readString(((Utf8) oldString393));
+                } else {
+                    charSequence393 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(393, charSequence393);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F393': "+ unionIndex393));
+            }
+        }
+        int unionIndex394 = (decoder.readIndex());
+        if (unionIndex394 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, null);
+        } else {
+            if (unionIndex394 == 1) {
+                Utf8 charSequence394;
+                Object oldString394 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(394);
+                if (oldString394 instanceof Utf8) {
+                    charSequence394 = (decoder).readString(((Utf8) oldString394));
+                } else {
+                    charSequence394 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(394, charSequence394);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F394': "+ unionIndex394));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema197(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex395 = (decoder.readIndex());
+        if (unionIndex395 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, null);
+        } else {
+            if (unionIndex395 == 1) {
+                Utf8 charSequence395;
+                Object oldString395 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(395);
+                if (oldString395 instanceof Utf8) {
+                    charSequence395 = (decoder).readString(((Utf8) oldString395));
+                } else {
+                    charSequence395 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(395, charSequence395);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F395': "+ unionIndex395));
+            }
+        }
+        int unionIndex396 = (decoder.readIndex());
+        if (unionIndex396 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, null);
+        } else {
+            if (unionIndex396 == 1) {
+                Utf8 charSequence396;
+                Object oldString396 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(396);
+                if (oldString396 instanceof Utf8) {
+                    charSequence396 = (decoder).readString(((Utf8) oldString396));
+                } else {
+                    charSequence396 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(396, charSequence396);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F396': "+ unionIndex396));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema198(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex397 = (decoder.readIndex());
+        if (unionIndex397 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, null);
+        } else {
+            if (unionIndex397 == 1) {
+                Utf8 charSequence397;
+                Object oldString397 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(397);
+                if (oldString397 instanceof Utf8) {
+                    charSequence397 = (decoder).readString(((Utf8) oldString397));
+                } else {
+                    charSequence397 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(397, charSequence397);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F397': "+ unionIndex397));
+            }
+        }
+        int unionIndex398 = (decoder.readIndex());
+        if (unionIndex398 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, null);
+        } else {
+            if (unionIndex398 == 1) {
+                Utf8 charSequence398;
+                Object oldString398 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(398);
+                if (oldString398 instanceof Utf8) {
+                    charSequence398 = (decoder).readString(((Utf8) oldString398));
+                } else {
+                    charSequence398 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(398, charSequence398);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F398': "+ unionIndex398));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema199(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex399 = (decoder.readIndex());
+        if (unionIndex399 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, null);
+        } else {
+            if (unionIndex399 == 1) {
+                Utf8 charSequence399;
+                Object oldString399 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(399);
+                if (oldString399 instanceof Utf8) {
+                    charSequence399 = (decoder).readString(((Utf8) oldString399));
+                } else {
+                    charSequence399 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(399, charSequence399);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F399': "+ unionIndex399));
+            }
+        }
+        int unionIndex400 = (decoder.readIndex());
+        if (unionIndex400 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, null);
+        } else {
+            if (unionIndex400 == 1) {
+                Utf8 charSequence400;
+                Object oldString400 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(400);
+                if (oldString400 instanceof Utf8) {
+                    charSequence400 = (decoder).readString(((Utf8) oldString400));
+                } else {
+                    charSequence400 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(400, charSequence400);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F400': "+ unionIndex400));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema200(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex401 = (decoder.readIndex());
+        if (unionIndex401 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, null);
+        } else {
+            if (unionIndex401 == 1) {
+                Utf8 charSequence401;
+                Object oldString401 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(401);
+                if (oldString401 instanceof Utf8) {
+                    charSequence401 = (decoder).readString(((Utf8) oldString401));
+                } else {
+                    charSequence401 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(401, charSequence401);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F401': "+ unionIndex401));
+            }
+        }
+        int unionIndex402 = (decoder.readIndex());
+        if (unionIndex402 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, null);
+        } else {
+            if (unionIndex402 == 1) {
+                Utf8 charSequence402;
+                Object oldString402 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(402);
+                if (oldString402 instanceof Utf8) {
+                    charSequence402 = (decoder).readString(((Utf8) oldString402));
+                } else {
+                    charSequence402 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(402, charSequence402);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F402': "+ unionIndex402));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema201(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex403 = (decoder.readIndex());
+        if (unionIndex403 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, null);
+        } else {
+            if (unionIndex403 == 1) {
+                Utf8 charSequence403;
+                Object oldString403 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(403);
+                if (oldString403 instanceof Utf8) {
+                    charSequence403 = (decoder).readString(((Utf8) oldString403));
+                } else {
+                    charSequence403 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(403, charSequence403);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F403': "+ unionIndex403));
+            }
+        }
+        int unionIndex404 = (decoder.readIndex());
+        if (unionIndex404 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, null);
+        } else {
+            if (unionIndex404 == 1) {
+                Utf8 charSequence404;
+                Object oldString404 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(404);
+                if (oldString404 instanceof Utf8) {
+                    charSequence404 = (decoder).readString(((Utf8) oldString404));
+                } else {
+                    charSequence404 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(404, charSequence404);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F404': "+ unionIndex404));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema202(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex405 = (decoder.readIndex());
+        if (unionIndex405 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, null);
+        } else {
+            if (unionIndex405 == 1) {
+                Utf8 charSequence405;
+                Object oldString405 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(405);
+                if (oldString405 instanceof Utf8) {
+                    charSequence405 = (decoder).readString(((Utf8) oldString405));
+                } else {
+                    charSequence405 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(405, charSequence405);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F405': "+ unionIndex405));
+            }
+        }
+        int unionIndex406 = (decoder.readIndex());
+        if (unionIndex406 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, null);
+        } else {
+            if (unionIndex406 == 1) {
+                Utf8 charSequence406;
+                Object oldString406 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(406);
+                if (oldString406 instanceof Utf8) {
+                    charSequence406 = (decoder).readString(((Utf8) oldString406));
+                } else {
+                    charSequence406 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(406, charSequence406);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F406': "+ unionIndex406));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema203(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex407 = (decoder.readIndex());
+        if (unionIndex407 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, null);
+        } else {
+            if (unionIndex407 == 1) {
+                Utf8 charSequence407;
+                Object oldString407 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(407);
+                if (oldString407 instanceof Utf8) {
+                    charSequence407 = (decoder).readString(((Utf8) oldString407));
+                } else {
+                    charSequence407 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(407, charSequence407);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F407': "+ unionIndex407));
+            }
+        }
+        int unionIndex408 = (decoder.readIndex());
+        if (unionIndex408 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, null);
+        } else {
+            if (unionIndex408 == 1) {
+                Utf8 charSequence408;
+                Object oldString408 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(408);
+                if (oldString408 instanceof Utf8) {
+                    charSequence408 = (decoder).readString(((Utf8) oldString408));
+                } else {
+                    charSequence408 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(408, charSequence408);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F408': "+ unionIndex408));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema204(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex409 = (decoder.readIndex());
+        if (unionIndex409 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, null);
+        } else {
+            if (unionIndex409 == 1) {
+                Utf8 charSequence409;
+                Object oldString409 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(409);
+                if (oldString409 instanceof Utf8) {
+                    charSequence409 = (decoder).readString(((Utf8) oldString409));
+                } else {
+                    charSequence409 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(409, charSequence409);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F409': "+ unionIndex409));
+            }
+        }
+        int unionIndex410 = (decoder.readIndex());
+        if (unionIndex410 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, null);
+        } else {
+            if (unionIndex410 == 1) {
+                Utf8 charSequence410;
+                Object oldString410 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(410);
+                if (oldString410 instanceof Utf8) {
+                    charSequence410 = (decoder).readString(((Utf8) oldString410));
+                } else {
+                    charSequence410 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(410, charSequence410);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F410': "+ unionIndex410));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema205(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex411 = (decoder.readIndex());
+        if (unionIndex411 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, null);
+        } else {
+            if (unionIndex411 == 1) {
+                Utf8 charSequence411;
+                Object oldString411 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(411);
+                if (oldString411 instanceof Utf8) {
+                    charSequence411 = (decoder).readString(((Utf8) oldString411));
+                } else {
+                    charSequence411 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(411, charSequence411);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F411': "+ unionIndex411));
+            }
+        }
+        int unionIndex412 = (decoder.readIndex());
+        if (unionIndex412 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, null);
+        } else {
+            if (unionIndex412 == 1) {
+                Utf8 charSequence412;
+                Object oldString412 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(412);
+                if (oldString412 instanceof Utf8) {
+                    charSequence412 = (decoder).readString(((Utf8) oldString412));
+                } else {
+                    charSequence412 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(412, charSequence412);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F412': "+ unionIndex412));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema206(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex413 = (decoder.readIndex());
+        if (unionIndex413 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, null);
+        } else {
+            if (unionIndex413 == 1) {
+                Utf8 charSequence413;
+                Object oldString413 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(413);
+                if (oldString413 instanceof Utf8) {
+                    charSequence413 = (decoder).readString(((Utf8) oldString413));
+                } else {
+                    charSequence413 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(413, charSequence413);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F413': "+ unionIndex413));
+            }
+        }
+        int unionIndex414 = (decoder.readIndex());
+        if (unionIndex414 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, null);
+        } else {
+            if (unionIndex414 == 1) {
+                Utf8 charSequence414;
+                Object oldString414 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(414);
+                if (oldString414 instanceof Utf8) {
+                    charSequence414 = (decoder).readString(((Utf8) oldString414));
+                } else {
+                    charSequence414 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(414, charSequence414);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F414': "+ unionIndex414));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema207(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex415 = (decoder.readIndex());
+        if (unionIndex415 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, null);
+        } else {
+            if (unionIndex415 == 1) {
+                Utf8 charSequence415;
+                Object oldString415 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(415);
+                if (oldString415 instanceof Utf8) {
+                    charSequence415 = (decoder).readString(((Utf8) oldString415));
+                } else {
+                    charSequence415 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(415, charSequence415);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F415': "+ unionIndex415));
+            }
+        }
+        int unionIndex416 = (decoder.readIndex());
+        if (unionIndex416 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, null);
+        } else {
+            if (unionIndex416 == 1) {
+                Utf8 charSequence416;
+                Object oldString416 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(416);
+                if (oldString416 instanceof Utf8) {
+                    charSequence416 = (decoder).readString(((Utf8) oldString416));
+                } else {
+                    charSequence416 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(416, charSequence416);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F416': "+ unionIndex416));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema208(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex417 = (decoder.readIndex());
+        if (unionIndex417 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, null);
+        } else {
+            if (unionIndex417 == 1) {
+                Utf8 charSequence417;
+                Object oldString417 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(417);
+                if (oldString417 instanceof Utf8) {
+                    charSequence417 = (decoder).readString(((Utf8) oldString417));
+                } else {
+                    charSequence417 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(417, charSequence417);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F417': "+ unionIndex417));
+            }
+        }
+        int unionIndex418 = (decoder.readIndex());
+        if (unionIndex418 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, null);
+        } else {
+            if (unionIndex418 == 1) {
+                Utf8 charSequence418;
+                Object oldString418 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(418);
+                if (oldString418 instanceof Utf8) {
+                    charSequence418 = (decoder).readString(((Utf8) oldString418));
+                } else {
+                    charSequence418 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(418, charSequence418);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F418': "+ unionIndex418));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema209(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex419 = (decoder.readIndex());
+        if (unionIndex419 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, null);
+        } else {
+            if (unionIndex419 == 1) {
+                Utf8 charSequence419;
+                Object oldString419 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(419);
+                if (oldString419 instanceof Utf8) {
+                    charSequence419 = (decoder).readString(((Utf8) oldString419));
+                } else {
+                    charSequence419 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(419, charSequence419);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F419': "+ unionIndex419));
+            }
+        }
+        int unionIndex420 = (decoder.readIndex());
+        if (unionIndex420 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, null);
+        } else {
+            if (unionIndex420 == 1) {
+                Utf8 charSequence420;
+                Object oldString420 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(420);
+                if (oldString420 instanceof Utf8) {
+                    charSequence420 = (decoder).readString(((Utf8) oldString420));
+                } else {
+                    charSequence420 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(420, charSequence420);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F420': "+ unionIndex420));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema210(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex421 = (decoder.readIndex());
+        if (unionIndex421 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, null);
+        } else {
+            if (unionIndex421 == 1) {
+                Utf8 charSequence421;
+                Object oldString421 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(421);
+                if (oldString421 instanceof Utf8) {
+                    charSequence421 = (decoder).readString(((Utf8) oldString421));
+                } else {
+                    charSequence421 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(421, charSequence421);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F421': "+ unionIndex421));
+            }
+        }
+        int unionIndex422 = (decoder.readIndex());
+        if (unionIndex422 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, null);
+        } else {
+            if (unionIndex422 == 1) {
+                Utf8 charSequence422;
+                Object oldString422 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(422);
+                if (oldString422 instanceof Utf8) {
+                    charSequence422 = (decoder).readString(((Utf8) oldString422));
+                } else {
+                    charSequence422 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(422, charSequence422);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F422': "+ unionIndex422));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema211(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex423 = (decoder.readIndex());
+        if (unionIndex423 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, null);
+        } else {
+            if (unionIndex423 == 1) {
+                Utf8 charSequence423;
+                Object oldString423 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(423);
+                if (oldString423 instanceof Utf8) {
+                    charSequence423 = (decoder).readString(((Utf8) oldString423));
+                } else {
+                    charSequence423 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(423, charSequence423);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F423': "+ unionIndex423));
+            }
+        }
+        int unionIndex424 = (decoder.readIndex());
+        if (unionIndex424 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, null);
+        } else {
+            if (unionIndex424 == 1) {
+                Utf8 charSequence424;
+                Object oldString424 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(424);
+                if (oldString424 instanceof Utf8) {
+                    charSequence424 = (decoder).readString(((Utf8) oldString424));
+                } else {
+                    charSequence424 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(424, charSequence424);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F424': "+ unionIndex424));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema212(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex425 = (decoder.readIndex());
+        if (unionIndex425 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, null);
+        } else {
+            if (unionIndex425 == 1) {
+                Utf8 charSequence425;
+                Object oldString425 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(425);
+                if (oldString425 instanceof Utf8) {
+                    charSequence425 = (decoder).readString(((Utf8) oldString425));
+                } else {
+                    charSequence425 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(425, charSequence425);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F425': "+ unionIndex425));
+            }
+        }
+        int unionIndex426 = (decoder.readIndex());
+        if (unionIndex426 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, null);
+        } else {
+            if (unionIndex426 == 1) {
+                Utf8 charSequence426;
+                Object oldString426 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(426);
+                if (oldString426 instanceof Utf8) {
+                    charSequence426 = (decoder).readString(((Utf8) oldString426));
+                } else {
+                    charSequence426 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(426, charSequence426);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F426': "+ unionIndex426));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema213(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex427 = (decoder.readIndex());
+        if (unionIndex427 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, null);
+        } else {
+            if (unionIndex427 == 1) {
+                Utf8 charSequence427;
+                Object oldString427 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(427);
+                if (oldString427 instanceof Utf8) {
+                    charSequence427 = (decoder).readString(((Utf8) oldString427));
+                } else {
+                    charSequence427 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(427, charSequence427);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F427': "+ unionIndex427));
+            }
+        }
+        int unionIndex428 = (decoder.readIndex());
+        if (unionIndex428 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, null);
+        } else {
+            if (unionIndex428 == 1) {
+                Utf8 charSequence428;
+                Object oldString428 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(428);
+                if (oldString428 instanceof Utf8) {
+                    charSequence428 = (decoder).readString(((Utf8) oldString428));
+                } else {
+                    charSequence428 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(428, charSequence428);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F428': "+ unionIndex428));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema214(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex429 = (decoder.readIndex());
+        if (unionIndex429 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, null);
+        } else {
+            if (unionIndex429 == 1) {
+                Utf8 charSequence429;
+                Object oldString429 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(429);
+                if (oldString429 instanceof Utf8) {
+                    charSequence429 = (decoder).readString(((Utf8) oldString429));
+                } else {
+                    charSequence429 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(429, charSequence429);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F429': "+ unionIndex429));
+            }
+        }
+        int unionIndex430 = (decoder.readIndex());
+        if (unionIndex430 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, null);
+        } else {
+            if (unionIndex430 == 1) {
+                Utf8 charSequence430;
+                Object oldString430 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(430);
+                if (oldString430 instanceof Utf8) {
+                    charSequence430 = (decoder).readString(((Utf8) oldString430));
+                } else {
+                    charSequence430 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(430, charSequence430);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F430': "+ unionIndex430));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema215(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex431 = (decoder.readIndex());
+        if (unionIndex431 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, null);
+        } else {
+            if (unionIndex431 == 1) {
+                Utf8 charSequence431;
+                Object oldString431 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(431);
+                if (oldString431 instanceof Utf8) {
+                    charSequence431 = (decoder).readString(((Utf8) oldString431));
+                } else {
+                    charSequence431 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(431, charSequence431);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F431': "+ unionIndex431));
+            }
+        }
+        int unionIndex432 = (decoder.readIndex());
+        if (unionIndex432 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, null);
+        } else {
+            if (unionIndex432 == 1) {
+                Utf8 charSequence432;
+                Object oldString432 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(432);
+                if (oldString432 instanceof Utf8) {
+                    charSequence432 = (decoder).readString(((Utf8) oldString432));
+                } else {
+                    charSequence432 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(432, charSequence432);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F432': "+ unionIndex432));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema216(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex433 = (decoder.readIndex());
+        if (unionIndex433 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, null);
+        } else {
+            if (unionIndex433 == 1) {
+                Utf8 charSequence433;
+                Object oldString433 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(433);
+                if (oldString433 instanceof Utf8) {
+                    charSequence433 = (decoder).readString(((Utf8) oldString433));
+                } else {
+                    charSequence433 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(433, charSequence433);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F433': "+ unionIndex433));
+            }
+        }
+        int unionIndex434 = (decoder.readIndex());
+        if (unionIndex434 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, null);
+        } else {
+            if (unionIndex434 == 1) {
+                Utf8 charSequence434;
+                Object oldString434 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(434);
+                if (oldString434 instanceof Utf8) {
+                    charSequence434 = (decoder).readString(((Utf8) oldString434));
+                } else {
+                    charSequence434 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(434, charSequence434);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F434': "+ unionIndex434));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema217(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex435 = (decoder.readIndex());
+        if (unionIndex435 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, null);
+        } else {
+            if (unionIndex435 == 1) {
+                Utf8 charSequence435;
+                Object oldString435 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(435);
+                if (oldString435 instanceof Utf8) {
+                    charSequence435 = (decoder).readString(((Utf8) oldString435));
+                } else {
+                    charSequence435 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(435, charSequence435);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F435': "+ unionIndex435));
+            }
+        }
+        int unionIndex436 = (decoder.readIndex());
+        if (unionIndex436 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, null);
+        } else {
+            if (unionIndex436 == 1) {
+                Utf8 charSequence436;
+                Object oldString436 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(436);
+                if (oldString436 instanceof Utf8) {
+                    charSequence436 = (decoder).readString(((Utf8) oldString436));
+                } else {
+                    charSequence436 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(436, charSequence436);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F436': "+ unionIndex436));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema218(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex437 = (decoder.readIndex());
+        if (unionIndex437 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, null);
+        } else {
+            if (unionIndex437 == 1) {
+                Utf8 charSequence437;
+                Object oldString437 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(437);
+                if (oldString437 instanceof Utf8) {
+                    charSequence437 = (decoder).readString(((Utf8) oldString437));
+                } else {
+                    charSequence437 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(437, charSequence437);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F437': "+ unionIndex437));
+            }
+        }
+        int unionIndex438 = (decoder.readIndex());
+        if (unionIndex438 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, null);
+        } else {
+            if (unionIndex438 == 1) {
+                Utf8 charSequence438;
+                Object oldString438 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(438);
+                if (oldString438 instanceof Utf8) {
+                    charSequence438 = (decoder).readString(((Utf8) oldString438));
+                } else {
+                    charSequence438 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(438, charSequence438);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F438': "+ unionIndex438));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema219(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex439 = (decoder.readIndex());
+        if (unionIndex439 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, null);
+        } else {
+            if (unionIndex439 == 1) {
+                Utf8 charSequence439;
+                Object oldString439 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(439);
+                if (oldString439 instanceof Utf8) {
+                    charSequence439 = (decoder).readString(((Utf8) oldString439));
+                } else {
+                    charSequence439 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(439, charSequence439);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F439': "+ unionIndex439));
+            }
+        }
+        int unionIndex440 = (decoder.readIndex());
+        if (unionIndex440 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, null);
+        } else {
+            if (unionIndex440 == 1) {
+                Utf8 charSequence440;
+                Object oldString440 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(440);
+                if (oldString440 instanceof Utf8) {
+                    charSequence440 = (decoder).readString(((Utf8) oldString440));
+                } else {
+                    charSequence440 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(440, charSequence440);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F440': "+ unionIndex440));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema220(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex441 = (decoder.readIndex());
+        if (unionIndex441 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, null);
+        } else {
+            if (unionIndex441 == 1) {
+                Utf8 charSequence441;
+                Object oldString441 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(441);
+                if (oldString441 instanceof Utf8) {
+                    charSequence441 = (decoder).readString(((Utf8) oldString441));
+                } else {
+                    charSequence441 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(441, charSequence441);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F441': "+ unionIndex441));
+            }
+        }
+        int unionIndex442 = (decoder.readIndex());
+        if (unionIndex442 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, null);
+        } else {
+            if (unionIndex442 == 1) {
+                Utf8 charSequence442;
+                Object oldString442 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(442);
+                if (oldString442 instanceof Utf8) {
+                    charSequence442 = (decoder).readString(((Utf8) oldString442));
+                } else {
+                    charSequence442 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(442, charSequence442);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F442': "+ unionIndex442));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema221(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex443 = (decoder.readIndex());
+        if (unionIndex443 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, null);
+        } else {
+            if (unionIndex443 == 1) {
+                Utf8 charSequence443;
+                Object oldString443 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(443);
+                if (oldString443 instanceof Utf8) {
+                    charSequence443 = (decoder).readString(((Utf8) oldString443));
+                } else {
+                    charSequence443 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(443, charSequence443);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F443': "+ unionIndex443));
+            }
+        }
+        int unionIndex444 = (decoder.readIndex());
+        if (unionIndex444 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, null);
+        } else {
+            if (unionIndex444 == 1) {
+                Utf8 charSequence444;
+                Object oldString444 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(444);
+                if (oldString444 instanceof Utf8) {
+                    charSequence444 = (decoder).readString(((Utf8) oldString444));
+                } else {
+                    charSequence444 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(444, charSequence444);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F444': "+ unionIndex444));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema222(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex445 = (decoder.readIndex());
+        if (unionIndex445 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, null);
+        } else {
+            if (unionIndex445 == 1) {
+                Utf8 charSequence445;
+                Object oldString445 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(445);
+                if (oldString445 instanceof Utf8) {
+                    charSequence445 = (decoder).readString(((Utf8) oldString445));
+                } else {
+                    charSequence445 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(445, charSequence445);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F445': "+ unionIndex445));
+            }
+        }
+        int unionIndex446 = (decoder.readIndex());
+        if (unionIndex446 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, null);
+        } else {
+            if (unionIndex446 == 1) {
+                Utf8 charSequence446;
+                Object oldString446 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(446);
+                if (oldString446 instanceof Utf8) {
+                    charSequence446 = (decoder).readString(((Utf8) oldString446));
+                } else {
+                    charSequence446 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(446, charSequence446);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F446': "+ unionIndex446));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema223(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex447 = (decoder.readIndex());
+        if (unionIndex447 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, null);
+        } else {
+            if (unionIndex447 == 1) {
+                Utf8 charSequence447;
+                Object oldString447 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(447);
+                if (oldString447 instanceof Utf8) {
+                    charSequence447 = (decoder).readString(((Utf8) oldString447));
+                } else {
+                    charSequence447 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(447, charSequence447);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F447': "+ unionIndex447));
+            }
+        }
+        int unionIndex448 = (decoder.readIndex());
+        if (unionIndex448 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, null);
+        } else {
+            if (unionIndex448 == 1) {
+                Utf8 charSequence448;
+                Object oldString448 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(448);
+                if (oldString448 instanceof Utf8) {
+                    charSequence448 = (decoder).readString(((Utf8) oldString448));
+                } else {
+                    charSequence448 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(448, charSequence448);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F448': "+ unionIndex448));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema224(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex449 = (decoder.readIndex());
+        if (unionIndex449 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, null);
+        } else {
+            if (unionIndex449 == 1) {
+                Utf8 charSequence449;
+                Object oldString449 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(449);
+                if (oldString449 instanceof Utf8) {
+                    charSequence449 = (decoder).readString(((Utf8) oldString449));
+                } else {
+                    charSequence449 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(449, charSequence449);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F449': "+ unionIndex449));
+            }
+        }
+        int unionIndex450 = (decoder.readIndex());
+        if (unionIndex450 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, null);
+        } else {
+            if (unionIndex450 == 1) {
+                Utf8 charSequence450;
+                Object oldString450 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(450);
+                if (oldString450 instanceof Utf8) {
+                    charSequence450 = (decoder).readString(((Utf8) oldString450));
+                } else {
+                    charSequence450 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(450, charSequence450);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F450': "+ unionIndex450));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema225(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex451 = (decoder.readIndex());
+        if (unionIndex451 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, null);
+        } else {
+            if (unionIndex451 == 1) {
+                Utf8 charSequence451;
+                Object oldString451 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(451);
+                if (oldString451 instanceof Utf8) {
+                    charSequence451 = (decoder).readString(((Utf8) oldString451));
+                } else {
+                    charSequence451 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(451, charSequence451);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F451': "+ unionIndex451));
+            }
+        }
+        int unionIndex452 = (decoder.readIndex());
+        if (unionIndex452 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, null);
+        } else {
+            if (unionIndex452 == 1) {
+                Utf8 charSequence452;
+                Object oldString452 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(452);
+                if (oldString452 instanceof Utf8) {
+                    charSequence452 = (decoder).readString(((Utf8) oldString452));
+                } else {
+                    charSequence452 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(452, charSequence452);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F452': "+ unionIndex452));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema226(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex453 = (decoder.readIndex());
+        if (unionIndex453 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, null);
+        } else {
+            if (unionIndex453 == 1) {
+                Utf8 charSequence453;
+                Object oldString453 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(453);
+                if (oldString453 instanceof Utf8) {
+                    charSequence453 = (decoder).readString(((Utf8) oldString453));
+                } else {
+                    charSequence453 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(453, charSequence453);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F453': "+ unionIndex453));
+            }
+        }
+        int unionIndex454 = (decoder.readIndex());
+        if (unionIndex454 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, null);
+        } else {
+            if (unionIndex454 == 1) {
+                Utf8 charSequence454;
+                Object oldString454 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(454);
+                if (oldString454 instanceof Utf8) {
+                    charSequence454 = (decoder).readString(((Utf8) oldString454));
+                } else {
+                    charSequence454 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(454, charSequence454);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F454': "+ unionIndex454));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema227(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex455 = (decoder.readIndex());
+        if (unionIndex455 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, null);
+        } else {
+            if (unionIndex455 == 1) {
+                Utf8 charSequence455;
+                Object oldString455 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(455);
+                if (oldString455 instanceof Utf8) {
+                    charSequence455 = (decoder).readString(((Utf8) oldString455));
+                } else {
+                    charSequence455 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(455, charSequence455);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F455': "+ unionIndex455));
+            }
+        }
+        int unionIndex456 = (decoder.readIndex());
+        if (unionIndex456 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, null);
+        } else {
+            if (unionIndex456 == 1) {
+                Utf8 charSequence456;
+                Object oldString456 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(456);
+                if (oldString456 instanceof Utf8) {
+                    charSequence456 = (decoder).readString(((Utf8) oldString456));
+                } else {
+                    charSequence456 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(456, charSequence456);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F456': "+ unionIndex456));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema228(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex457 = (decoder.readIndex());
+        if (unionIndex457 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, null);
+        } else {
+            if (unionIndex457 == 1) {
+                Utf8 charSequence457;
+                Object oldString457 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(457);
+                if (oldString457 instanceof Utf8) {
+                    charSequence457 = (decoder).readString(((Utf8) oldString457));
+                } else {
+                    charSequence457 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(457, charSequence457);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F457': "+ unionIndex457));
+            }
+        }
+        int unionIndex458 = (decoder.readIndex());
+        if (unionIndex458 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, null);
+        } else {
+            if (unionIndex458 == 1) {
+                Utf8 charSequence458;
+                Object oldString458 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(458);
+                if (oldString458 instanceof Utf8) {
+                    charSequence458 = (decoder).readString(((Utf8) oldString458));
+                } else {
+                    charSequence458 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(458, charSequence458);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F458': "+ unionIndex458));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema229(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex459 = (decoder.readIndex());
+        if (unionIndex459 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, null);
+        } else {
+            if (unionIndex459 == 1) {
+                Utf8 charSequence459;
+                Object oldString459 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(459);
+                if (oldString459 instanceof Utf8) {
+                    charSequence459 = (decoder).readString(((Utf8) oldString459));
+                } else {
+                    charSequence459 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(459, charSequence459);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F459': "+ unionIndex459));
+            }
+        }
+        int unionIndex460 = (decoder.readIndex());
+        if (unionIndex460 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, null);
+        } else {
+            if (unionIndex460 == 1) {
+                Utf8 charSequence460;
+                Object oldString460 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(460);
+                if (oldString460 instanceof Utf8) {
+                    charSequence460 = (decoder).readString(((Utf8) oldString460));
+                } else {
+                    charSequence460 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(460, charSequence460);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F460': "+ unionIndex460));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema230(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex461 = (decoder.readIndex());
+        if (unionIndex461 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, null);
+        } else {
+            if (unionIndex461 == 1) {
+                Utf8 charSequence461;
+                Object oldString461 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(461);
+                if (oldString461 instanceof Utf8) {
+                    charSequence461 = (decoder).readString(((Utf8) oldString461));
+                } else {
+                    charSequence461 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(461, charSequence461);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F461': "+ unionIndex461));
+            }
+        }
+        int unionIndex462 = (decoder.readIndex());
+        if (unionIndex462 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, null);
+        } else {
+            if (unionIndex462 == 1) {
+                Utf8 charSequence462;
+                Object oldString462 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(462);
+                if (oldString462 instanceof Utf8) {
+                    charSequence462 = (decoder).readString(((Utf8) oldString462));
+                } else {
+                    charSequence462 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(462, charSequence462);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F462': "+ unionIndex462));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema231(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex463 = (decoder.readIndex());
+        if (unionIndex463 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, null);
+        } else {
+            if (unionIndex463 == 1) {
+                Utf8 charSequence463;
+                Object oldString463 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(463);
+                if (oldString463 instanceof Utf8) {
+                    charSequence463 = (decoder).readString(((Utf8) oldString463));
+                } else {
+                    charSequence463 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(463, charSequence463);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F463': "+ unionIndex463));
+            }
+        }
+        int unionIndex464 = (decoder.readIndex());
+        if (unionIndex464 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, null);
+        } else {
+            if (unionIndex464 == 1) {
+                Utf8 charSequence464;
+                Object oldString464 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(464);
+                if (oldString464 instanceof Utf8) {
+                    charSequence464 = (decoder).readString(((Utf8) oldString464));
+                } else {
+                    charSequence464 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(464, charSequence464);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F464': "+ unionIndex464));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema232(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex465 = (decoder.readIndex());
+        if (unionIndex465 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, null);
+        } else {
+            if (unionIndex465 == 1) {
+                Utf8 charSequence465;
+                Object oldString465 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(465);
+                if (oldString465 instanceof Utf8) {
+                    charSequence465 = (decoder).readString(((Utf8) oldString465));
+                } else {
+                    charSequence465 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(465, charSequence465);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F465': "+ unionIndex465));
+            }
+        }
+        int unionIndex466 = (decoder.readIndex());
+        if (unionIndex466 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, null);
+        } else {
+            if (unionIndex466 == 1) {
+                Utf8 charSequence466;
+                Object oldString466 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(466);
+                if (oldString466 instanceof Utf8) {
+                    charSequence466 = (decoder).readString(((Utf8) oldString466));
+                } else {
+                    charSequence466 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(466, charSequence466);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F466': "+ unionIndex466));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema233(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex467 = (decoder.readIndex());
+        if (unionIndex467 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, null);
+        } else {
+            if (unionIndex467 == 1) {
+                Utf8 charSequence467;
+                Object oldString467 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(467);
+                if (oldString467 instanceof Utf8) {
+                    charSequence467 = (decoder).readString(((Utf8) oldString467));
+                } else {
+                    charSequence467 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(467, charSequence467);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F467': "+ unionIndex467));
+            }
+        }
+        int unionIndex468 = (decoder.readIndex());
+        if (unionIndex468 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, null);
+        } else {
+            if (unionIndex468 == 1) {
+                Utf8 charSequence468;
+                Object oldString468 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(468);
+                if (oldString468 instanceof Utf8) {
+                    charSequence468 = (decoder).readString(((Utf8) oldString468));
+                } else {
+                    charSequence468 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(468, charSequence468);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F468': "+ unionIndex468));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema234(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex469 = (decoder.readIndex());
+        if (unionIndex469 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, null);
+        } else {
+            if (unionIndex469 == 1) {
+                Utf8 charSequence469;
+                Object oldString469 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(469);
+                if (oldString469 instanceof Utf8) {
+                    charSequence469 = (decoder).readString(((Utf8) oldString469));
+                } else {
+                    charSequence469 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(469, charSequence469);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F469': "+ unionIndex469));
+            }
+        }
+        int unionIndex470 = (decoder.readIndex());
+        if (unionIndex470 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, null);
+        } else {
+            if (unionIndex470 == 1) {
+                Utf8 charSequence470;
+                Object oldString470 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(470);
+                if (oldString470 instanceof Utf8) {
+                    charSequence470 = (decoder).readString(((Utf8) oldString470));
+                } else {
+                    charSequence470 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(470, charSequence470);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F470': "+ unionIndex470));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema235(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex471 = (decoder.readIndex());
+        if (unionIndex471 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, null);
+        } else {
+            if (unionIndex471 == 1) {
+                Utf8 charSequence471;
+                Object oldString471 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(471);
+                if (oldString471 instanceof Utf8) {
+                    charSequence471 = (decoder).readString(((Utf8) oldString471));
+                } else {
+                    charSequence471 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(471, charSequence471);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F471': "+ unionIndex471));
+            }
+        }
+        int unionIndex472 = (decoder.readIndex());
+        if (unionIndex472 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, null);
+        } else {
+            if (unionIndex472 == 1) {
+                Utf8 charSequence472;
+                Object oldString472 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(472);
+                if (oldString472 instanceof Utf8) {
+                    charSequence472 = (decoder).readString(((Utf8) oldString472));
+                } else {
+                    charSequence472 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(472, charSequence472);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F472': "+ unionIndex472));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema236(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex473 = (decoder.readIndex());
+        if (unionIndex473 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, null);
+        } else {
+            if (unionIndex473 == 1) {
+                Utf8 charSequence473;
+                Object oldString473 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(473);
+                if (oldString473 instanceof Utf8) {
+                    charSequence473 = (decoder).readString(((Utf8) oldString473));
+                } else {
+                    charSequence473 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(473, charSequence473);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F473': "+ unionIndex473));
+            }
+        }
+        int unionIndex474 = (decoder.readIndex());
+        if (unionIndex474 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, null);
+        } else {
+            if (unionIndex474 == 1) {
+                Utf8 charSequence474;
+                Object oldString474 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(474);
+                if (oldString474 instanceof Utf8) {
+                    charSequence474 = (decoder).readString(((Utf8) oldString474));
+                } else {
+                    charSequence474 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(474, charSequence474);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F474': "+ unionIndex474));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema237(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex475 = (decoder.readIndex());
+        if (unionIndex475 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, null);
+        } else {
+            if (unionIndex475 == 1) {
+                Utf8 charSequence475;
+                Object oldString475 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(475);
+                if (oldString475 instanceof Utf8) {
+                    charSequence475 = (decoder).readString(((Utf8) oldString475));
+                } else {
+                    charSequence475 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(475, charSequence475);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F475': "+ unionIndex475));
+            }
+        }
+        int unionIndex476 = (decoder.readIndex());
+        if (unionIndex476 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, null);
+        } else {
+            if (unionIndex476 == 1) {
+                Utf8 charSequence476;
+                Object oldString476 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(476);
+                if (oldString476 instanceof Utf8) {
+                    charSequence476 = (decoder).readString(((Utf8) oldString476));
+                } else {
+                    charSequence476 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(476, charSequence476);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F476': "+ unionIndex476));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema238(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex477 = (decoder.readIndex());
+        if (unionIndex477 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, null);
+        } else {
+            if (unionIndex477 == 1) {
+                Utf8 charSequence477;
+                Object oldString477 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(477);
+                if (oldString477 instanceof Utf8) {
+                    charSequence477 = (decoder).readString(((Utf8) oldString477));
+                } else {
+                    charSequence477 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(477, charSequence477);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F477': "+ unionIndex477));
+            }
+        }
+        int unionIndex478 = (decoder.readIndex());
+        if (unionIndex478 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, null);
+        } else {
+            if (unionIndex478 == 1) {
+                Utf8 charSequence478;
+                Object oldString478 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(478);
+                if (oldString478 instanceof Utf8) {
+                    charSequence478 = (decoder).readString(((Utf8) oldString478));
+                } else {
+                    charSequence478 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(478, charSequence478);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F478': "+ unionIndex478));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema239(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex479 = (decoder.readIndex());
+        if (unionIndex479 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, null);
+        } else {
+            if (unionIndex479 == 1) {
+                Utf8 charSequence479;
+                Object oldString479 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(479);
+                if (oldString479 instanceof Utf8) {
+                    charSequence479 = (decoder).readString(((Utf8) oldString479));
+                } else {
+                    charSequence479 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(479, charSequence479);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F479': "+ unionIndex479));
+            }
+        }
+        int unionIndex480 = (decoder.readIndex());
+        if (unionIndex480 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, null);
+        } else {
+            if (unionIndex480 == 1) {
+                Utf8 charSequence480;
+                Object oldString480 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(480);
+                if (oldString480 instanceof Utf8) {
+                    charSequence480 = (decoder).readString(((Utf8) oldString480));
+                } else {
+                    charSequence480 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(480, charSequence480);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F480': "+ unionIndex480));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema240(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex481 = (decoder.readIndex());
+        if (unionIndex481 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, null);
+        } else {
+            if (unionIndex481 == 1) {
+                Utf8 charSequence481;
+                Object oldString481 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(481);
+                if (oldString481 instanceof Utf8) {
+                    charSequence481 = (decoder).readString(((Utf8) oldString481));
+                } else {
+                    charSequence481 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(481, charSequence481);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F481': "+ unionIndex481));
+            }
+        }
+        int unionIndex482 = (decoder.readIndex());
+        if (unionIndex482 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, null);
+        } else {
+            if (unionIndex482 == 1) {
+                Utf8 charSequence482;
+                Object oldString482 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(482);
+                if (oldString482 instanceof Utf8) {
+                    charSequence482 = (decoder).readString(((Utf8) oldString482));
+                } else {
+                    charSequence482 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(482, charSequence482);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F482': "+ unionIndex482));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema241(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex483 = (decoder.readIndex());
+        if (unionIndex483 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, null);
+        } else {
+            if (unionIndex483 == 1) {
+                Utf8 charSequence483;
+                Object oldString483 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(483);
+                if (oldString483 instanceof Utf8) {
+                    charSequence483 = (decoder).readString(((Utf8) oldString483));
+                } else {
+                    charSequence483 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(483, charSequence483);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F483': "+ unionIndex483));
+            }
+        }
+        int unionIndex484 = (decoder.readIndex());
+        if (unionIndex484 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, null);
+        } else {
+            if (unionIndex484 == 1) {
+                Utf8 charSequence484;
+                Object oldString484 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(484);
+                if (oldString484 instanceof Utf8) {
+                    charSequence484 = (decoder).readString(((Utf8) oldString484));
+                } else {
+                    charSequence484 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(484, charSequence484);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F484': "+ unionIndex484));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema242(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex485 = (decoder.readIndex());
+        if (unionIndex485 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, null);
+        } else {
+            if (unionIndex485 == 1) {
+                Utf8 charSequence485;
+                Object oldString485 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(485);
+                if (oldString485 instanceof Utf8) {
+                    charSequence485 = (decoder).readString(((Utf8) oldString485));
+                } else {
+                    charSequence485 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(485, charSequence485);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F485': "+ unionIndex485));
+            }
+        }
+        int unionIndex486 = (decoder.readIndex());
+        if (unionIndex486 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, null);
+        } else {
+            if (unionIndex486 == 1) {
+                Utf8 charSequence486;
+                Object oldString486 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(486);
+                if (oldString486 instanceof Utf8) {
+                    charSequence486 = (decoder).readString(((Utf8) oldString486));
+                } else {
+                    charSequence486 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(486, charSequence486);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F486': "+ unionIndex486));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema243(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex487 = (decoder.readIndex());
+        if (unionIndex487 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, null);
+        } else {
+            if (unionIndex487 == 1) {
+                Utf8 charSequence487;
+                Object oldString487 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(487);
+                if (oldString487 instanceof Utf8) {
+                    charSequence487 = (decoder).readString(((Utf8) oldString487));
+                } else {
+                    charSequence487 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(487, charSequence487);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F487': "+ unionIndex487));
+            }
+        }
+        int unionIndex488 = (decoder.readIndex());
+        if (unionIndex488 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, null);
+        } else {
+            if (unionIndex488 == 1) {
+                Utf8 charSequence488;
+                Object oldString488 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(488);
+                if (oldString488 instanceof Utf8) {
+                    charSequence488 = (decoder).readString(((Utf8) oldString488));
+                } else {
+                    charSequence488 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(488, charSequence488);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F488': "+ unionIndex488));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema244(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex489 = (decoder.readIndex());
+        if (unionIndex489 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, null);
+        } else {
+            if (unionIndex489 == 1) {
+                Utf8 charSequence489;
+                Object oldString489 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(489);
+                if (oldString489 instanceof Utf8) {
+                    charSequence489 = (decoder).readString(((Utf8) oldString489));
+                } else {
+                    charSequence489 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(489, charSequence489);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F489': "+ unionIndex489));
+            }
+        }
+        int unionIndex490 = (decoder.readIndex());
+        if (unionIndex490 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, null);
+        } else {
+            if (unionIndex490 == 1) {
+                Utf8 charSequence490;
+                Object oldString490 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(490);
+                if (oldString490 instanceof Utf8) {
+                    charSequence490 = (decoder).readString(((Utf8) oldString490));
+                } else {
+                    charSequence490 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(490, charSequence490);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F490': "+ unionIndex490));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema245(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex491 = (decoder.readIndex());
+        if (unionIndex491 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, null);
+        } else {
+            if (unionIndex491 == 1) {
+                Utf8 charSequence491;
+                Object oldString491 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(491);
+                if (oldString491 instanceof Utf8) {
+                    charSequence491 = (decoder).readString(((Utf8) oldString491));
+                } else {
+                    charSequence491 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(491, charSequence491);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F491': "+ unionIndex491));
+            }
+        }
+        int unionIndex492 = (decoder.readIndex());
+        if (unionIndex492 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, null);
+        } else {
+            if (unionIndex492 == 1) {
+                Utf8 charSequence492;
+                Object oldString492 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(492);
+                if (oldString492 instanceof Utf8) {
+                    charSequence492 = (decoder).readString(((Utf8) oldString492));
+                } else {
+                    charSequence492 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(492, charSequence492);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F492': "+ unionIndex492));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema246(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex493 = (decoder.readIndex());
+        if (unionIndex493 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, null);
+        } else {
+            if (unionIndex493 == 1) {
+                Utf8 charSequence493;
+                Object oldString493 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(493);
+                if (oldString493 instanceof Utf8) {
+                    charSequence493 = (decoder).readString(((Utf8) oldString493));
+                } else {
+                    charSequence493 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(493, charSequence493);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F493': "+ unionIndex493));
+            }
+        }
+        int unionIndex494 = (decoder.readIndex());
+        if (unionIndex494 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, null);
+        } else {
+            if (unionIndex494 == 1) {
+                Utf8 charSequence494;
+                Object oldString494 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(494);
+                if (oldString494 instanceof Utf8) {
+                    charSequence494 = (decoder).readString(((Utf8) oldString494));
+                } else {
+                    charSequence494 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(494, charSequence494);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F494': "+ unionIndex494));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema247(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex495 = (decoder.readIndex());
+        if (unionIndex495 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, null);
+        } else {
+            if (unionIndex495 == 1) {
+                Utf8 charSequence495;
+                Object oldString495 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(495);
+                if (oldString495 instanceof Utf8) {
+                    charSequence495 = (decoder).readString(((Utf8) oldString495));
+                } else {
+                    charSequence495 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(495, charSequence495);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F495': "+ unionIndex495));
+            }
+        }
+        int unionIndex496 = (decoder.readIndex());
+        if (unionIndex496 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, null);
+        } else {
+            if (unionIndex496 == 1) {
+                Utf8 charSequence496;
+                Object oldString496 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(496);
+                if (oldString496 instanceof Utf8) {
+                    charSequence496 = (decoder).readString(((Utf8) oldString496));
+                } else {
+                    charSequence496 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(496, charSequence496);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F496': "+ unionIndex496));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema248(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex497 = (decoder.readIndex());
+        if (unionIndex497 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, null);
+        } else {
+            if (unionIndex497 == 1) {
+                Utf8 charSequence497;
+                Object oldString497 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(497);
+                if (oldString497 instanceof Utf8) {
+                    charSequence497 = (decoder).readString(((Utf8) oldString497));
+                } else {
+                    charSequence497 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(497, charSequence497);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F497': "+ unionIndex497));
+            }
+        }
+        int unionIndex498 = (decoder.readIndex());
+        if (unionIndex498 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, null);
+        } else {
+            if (unionIndex498 == 1) {
+                Utf8 charSequence498;
+                Object oldString498 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(498);
+                if (oldString498 instanceof Utf8) {
+                    charSequence498 = (decoder).readString(((Utf8) oldString498));
+                } else {
+                    charSequence498 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(498, charSequence498);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F498': "+ unionIndex498));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema249(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex499 = (decoder.readIndex());
+        if (unionIndex499 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, null);
+        } else {
+            if (unionIndex499 == 1) {
+                Utf8 charSequence499;
+                Object oldString499 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(499);
+                if (oldString499 instanceof Utf8) {
+                    charSequence499 = (decoder).readString(((Utf8) oldString499));
+                } else {
+                    charSequence499 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(499, charSequence499);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F499': "+ unionIndex499));
+            }
+        }
+        int unionIndex500 = (decoder.readIndex());
+        if (unionIndex500 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, null);
+        } else {
+            if (unionIndex500 == 1) {
+                Utf8 charSequence500;
+                Object oldString500 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(500);
+                if (oldString500 instanceof Utf8) {
+                    charSequence500 = (decoder).readString(((Utf8) oldString500));
+                } else {
+                    charSequence500 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(500, charSequence500);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F500': "+ unionIndex500));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema250(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex501 = (decoder.readIndex());
+        if (unionIndex501 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, null);
+        } else {
+            if (unionIndex501 == 1) {
+                Utf8 charSequence501;
+                Object oldString501 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(501);
+                if (oldString501 instanceof Utf8) {
+                    charSequence501 = (decoder).readString(((Utf8) oldString501));
+                } else {
+                    charSequence501 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(501, charSequence501);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F501': "+ unionIndex501));
+            }
+        }
+        int unionIndex502 = (decoder.readIndex());
+        if (unionIndex502 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, null);
+        } else {
+            if (unionIndex502 == 1) {
+                Utf8 charSequence502;
+                Object oldString502 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(502);
+                if (oldString502 instanceof Utf8) {
+                    charSequence502 = (decoder).readString(((Utf8) oldString502));
+                } else {
+                    charSequence502 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(502, charSequence502);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F502': "+ unionIndex502));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema251(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex503 = (decoder.readIndex());
+        if (unionIndex503 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, null);
+        } else {
+            if (unionIndex503 == 1) {
+                Utf8 charSequence503;
+                Object oldString503 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(503);
+                if (oldString503 instanceof Utf8) {
+                    charSequence503 = (decoder).readString(((Utf8) oldString503));
+                } else {
+                    charSequence503 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(503, charSequence503);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F503': "+ unionIndex503));
+            }
+        }
+        int unionIndex504 = (decoder.readIndex());
+        if (unionIndex504 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, null);
+        } else {
+            if (unionIndex504 == 1) {
+                Utf8 charSequence504;
+                Object oldString504 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(504);
+                if (oldString504 instanceof Utf8) {
+                    charSequence504 = (decoder).readString(((Utf8) oldString504));
+                } else {
+                    charSequence504 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(504, charSequence504);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F504': "+ unionIndex504));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema252(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex505 = (decoder.readIndex());
+        if (unionIndex505 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, null);
+        } else {
+            if (unionIndex505 == 1) {
+                Utf8 charSequence505;
+                Object oldString505 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(505);
+                if (oldString505 instanceof Utf8) {
+                    charSequence505 = (decoder).readString(((Utf8) oldString505));
+                } else {
+                    charSequence505 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(505, charSequence505);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F505': "+ unionIndex505));
+            }
+        }
+        int unionIndex506 = (decoder.readIndex());
+        if (unionIndex506 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, null);
+        } else {
+            if (unionIndex506 == 1) {
+                Utf8 charSequence506;
+                Object oldString506 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(506);
+                if (oldString506 instanceof Utf8) {
+                    charSequence506 = (decoder).readString(((Utf8) oldString506));
+                } else {
+                    charSequence506 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(506, charSequence506);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F506': "+ unionIndex506));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema253(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex507 = (decoder.readIndex());
+        if (unionIndex507 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, null);
+        } else {
+            if (unionIndex507 == 1) {
+                Utf8 charSequence507;
+                Object oldString507 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(507);
+                if (oldString507 instanceof Utf8) {
+                    charSequence507 = (decoder).readString(((Utf8) oldString507));
+                } else {
+                    charSequence507 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(507, charSequence507);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F507': "+ unionIndex507));
+            }
+        }
+        int unionIndex508 = (decoder.readIndex());
+        if (unionIndex508 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, null);
+        } else {
+            if (unionIndex508 == 1) {
+                Utf8 charSequence508;
+                Object oldString508 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(508);
+                if (oldString508 instanceof Utf8) {
+                    charSequence508 = (decoder).readString(((Utf8) oldString508));
+                } else {
+                    charSequence508 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(508, charSequence508);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F508': "+ unionIndex508));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema254(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex509 = (decoder.readIndex());
+        if (unionIndex509 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, null);
+        } else {
+            if (unionIndex509 == 1) {
+                Utf8 charSequence509;
+                Object oldString509 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(509);
+                if (oldString509 instanceof Utf8) {
+                    charSequence509 = (decoder).readString(((Utf8) oldString509));
+                } else {
+                    charSequence509 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(509, charSequence509);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F509': "+ unionIndex509));
+            }
+        }
+        int unionIndex510 = (decoder.readIndex());
+        if (unionIndex510 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, null);
+        } else {
+            if (unionIndex510 == 1) {
+                Utf8 charSequence510;
+                Object oldString510 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(510);
+                if (oldString510 instanceof Utf8) {
+                    charSequence510 = (decoder).readString(((Utf8) oldString510));
+                } else {
+                    charSequence510 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(510, charSequence510);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F510': "+ unionIndex510));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema255(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex511 = (decoder.readIndex());
+        if (unionIndex511 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, null);
+        } else {
+            if (unionIndex511 == 1) {
+                Utf8 charSequence511;
+                Object oldString511 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(511);
+                if (oldString511 instanceof Utf8) {
+                    charSequence511 = (decoder).readString(((Utf8) oldString511));
+                } else {
+                    charSequence511 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(511, charSequence511);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F511': "+ unionIndex511));
+            }
+        }
+        int unionIndex512 = (decoder.readIndex());
+        if (unionIndex512 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, null);
+        } else {
+            if (unionIndex512 == 1) {
+                Utf8 charSequence512;
+                Object oldString512 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(512);
+                if (oldString512 instanceof Utf8) {
+                    charSequence512 = (decoder).readString(((Utf8) oldString512));
+                } else {
+                    charSequence512 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(512, charSequence512);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F512': "+ unionIndex512));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema256(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex513 = (decoder.readIndex());
+        if (unionIndex513 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, null);
+        } else {
+            if (unionIndex513 == 1) {
+                Utf8 charSequence513;
+                Object oldString513 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(513);
+                if (oldString513 instanceof Utf8) {
+                    charSequence513 = (decoder).readString(((Utf8) oldString513));
+                } else {
+                    charSequence513 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(513, charSequence513);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F513': "+ unionIndex513));
+            }
+        }
+        int unionIndex514 = (decoder.readIndex());
+        if (unionIndex514 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, null);
+        } else {
+            if (unionIndex514 == 1) {
+                Utf8 charSequence514;
+                Object oldString514 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(514);
+                if (oldString514 instanceof Utf8) {
+                    charSequence514 = (decoder).readString(((Utf8) oldString514));
+                } else {
+                    charSequence514 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(514, charSequence514);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F514': "+ unionIndex514));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema257(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex515 = (decoder.readIndex());
+        if (unionIndex515 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, null);
+        } else {
+            if (unionIndex515 == 1) {
+                Utf8 charSequence515;
+                Object oldString515 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(515);
+                if (oldString515 instanceof Utf8) {
+                    charSequence515 = (decoder).readString(((Utf8) oldString515));
+                } else {
+                    charSequence515 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(515, charSequence515);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F515': "+ unionIndex515));
+            }
+        }
+        int unionIndex516 = (decoder.readIndex());
+        if (unionIndex516 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, null);
+        } else {
+            if (unionIndex516 == 1) {
+                Utf8 charSequence516;
+                Object oldString516 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(516);
+                if (oldString516 instanceof Utf8) {
+                    charSequence516 = (decoder).readString(((Utf8) oldString516));
+                } else {
+                    charSequence516 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(516, charSequence516);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F516': "+ unionIndex516));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema258(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex517 = (decoder.readIndex());
+        if (unionIndex517 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, null);
+        } else {
+            if (unionIndex517 == 1) {
+                Utf8 charSequence517;
+                Object oldString517 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(517);
+                if (oldString517 instanceof Utf8) {
+                    charSequence517 = (decoder).readString(((Utf8) oldString517));
+                } else {
+                    charSequence517 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(517, charSequence517);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F517': "+ unionIndex517));
+            }
+        }
+        int unionIndex518 = (decoder.readIndex());
+        if (unionIndex518 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, null);
+        } else {
+            if (unionIndex518 == 1) {
+                Utf8 charSequence518;
+                Object oldString518 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(518);
+                if (oldString518 instanceof Utf8) {
+                    charSequence518 = (decoder).readString(((Utf8) oldString518));
+                } else {
+                    charSequence518 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(518, charSequence518);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F518': "+ unionIndex518));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema259(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex519 = (decoder.readIndex());
+        if (unionIndex519 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, null);
+        } else {
+            if (unionIndex519 == 1) {
+                Utf8 charSequence519;
+                Object oldString519 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(519);
+                if (oldString519 instanceof Utf8) {
+                    charSequence519 = (decoder).readString(((Utf8) oldString519));
+                } else {
+                    charSequence519 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(519, charSequence519);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F519': "+ unionIndex519));
+            }
+        }
+        int unionIndex520 = (decoder.readIndex());
+        if (unionIndex520 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, null);
+        } else {
+            if (unionIndex520 == 1) {
+                Utf8 charSequence520;
+                Object oldString520 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(520);
+                if (oldString520 instanceof Utf8) {
+                    charSequence520 = (decoder).readString(((Utf8) oldString520));
+                } else {
+                    charSequence520 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(520, charSequence520);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F520': "+ unionIndex520));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema260(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex521 = (decoder.readIndex());
+        if (unionIndex521 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, null);
+        } else {
+            if (unionIndex521 == 1) {
+                Utf8 charSequence521;
+                Object oldString521 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(521);
+                if (oldString521 instanceof Utf8) {
+                    charSequence521 = (decoder).readString(((Utf8) oldString521));
+                } else {
+                    charSequence521 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(521, charSequence521);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F521': "+ unionIndex521));
+            }
+        }
+        int unionIndex522 = (decoder.readIndex());
+        if (unionIndex522 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, null);
+        } else {
+            if (unionIndex522 == 1) {
+                Utf8 charSequence522;
+                Object oldString522 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(522);
+                if (oldString522 instanceof Utf8) {
+                    charSequence522 = (decoder).readString(((Utf8) oldString522));
+                } else {
+                    charSequence522 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(522, charSequence522);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F522': "+ unionIndex522));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema261(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex523 = (decoder.readIndex());
+        if (unionIndex523 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, null);
+        } else {
+            if (unionIndex523 == 1) {
+                Utf8 charSequence523;
+                Object oldString523 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(523);
+                if (oldString523 instanceof Utf8) {
+                    charSequence523 = (decoder).readString(((Utf8) oldString523));
+                } else {
+                    charSequence523 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(523, charSequence523);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F523': "+ unionIndex523));
+            }
+        }
+        int unionIndex524 = (decoder.readIndex());
+        if (unionIndex524 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, null);
+        } else {
+            if (unionIndex524 == 1) {
+                Utf8 charSequence524;
+                Object oldString524 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(524);
+                if (oldString524 instanceof Utf8) {
+                    charSequence524 = (decoder).readString(((Utf8) oldString524));
+                } else {
+                    charSequence524 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(524, charSequence524);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F524': "+ unionIndex524));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema262(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex525 = (decoder.readIndex());
+        if (unionIndex525 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, null);
+        } else {
+            if (unionIndex525 == 1) {
+                Utf8 charSequence525;
+                Object oldString525 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(525);
+                if (oldString525 instanceof Utf8) {
+                    charSequence525 = (decoder).readString(((Utf8) oldString525));
+                } else {
+                    charSequence525 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(525, charSequence525);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F525': "+ unionIndex525));
+            }
+        }
+        int unionIndex526 = (decoder.readIndex());
+        if (unionIndex526 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, null);
+        } else {
+            if (unionIndex526 == 1) {
+                Utf8 charSequence526;
+                Object oldString526 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(526);
+                if (oldString526 instanceof Utf8) {
+                    charSequence526 = (decoder).readString(((Utf8) oldString526));
+                } else {
+                    charSequence526 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(526, charSequence526);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F526': "+ unionIndex526));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema263(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex527 = (decoder.readIndex());
+        if (unionIndex527 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, null);
+        } else {
+            if (unionIndex527 == 1) {
+                Utf8 charSequence527;
+                Object oldString527 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(527);
+                if (oldString527 instanceof Utf8) {
+                    charSequence527 = (decoder).readString(((Utf8) oldString527));
+                } else {
+                    charSequence527 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(527, charSequence527);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F527': "+ unionIndex527));
+            }
+        }
+        int unionIndex528 = (decoder.readIndex());
+        if (unionIndex528 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, null);
+        } else {
+            if (unionIndex528 == 1) {
+                Utf8 charSequence528;
+                Object oldString528 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(528);
+                if (oldString528 instanceof Utf8) {
+                    charSequence528 = (decoder).readString(((Utf8) oldString528));
+                } else {
+                    charSequence528 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(528, charSequence528);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F528': "+ unionIndex528));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema264(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex529 = (decoder.readIndex());
+        if (unionIndex529 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, null);
+        } else {
+            if (unionIndex529 == 1) {
+                Utf8 charSequence529;
+                Object oldString529 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(529);
+                if (oldString529 instanceof Utf8) {
+                    charSequence529 = (decoder).readString(((Utf8) oldString529));
+                } else {
+                    charSequence529 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(529, charSequence529);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F529': "+ unionIndex529));
+            }
+        }
+        int unionIndex530 = (decoder.readIndex());
+        if (unionIndex530 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, null);
+        } else {
+            if (unionIndex530 == 1) {
+                Utf8 charSequence530;
+                Object oldString530 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(530);
+                if (oldString530 instanceof Utf8) {
+                    charSequence530 = (decoder).readString(((Utf8) oldString530));
+                } else {
+                    charSequence530 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(530, charSequence530);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F530': "+ unionIndex530));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema265(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex531 = (decoder.readIndex());
+        if (unionIndex531 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, null);
+        } else {
+            if (unionIndex531 == 1) {
+                Utf8 charSequence531;
+                Object oldString531 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(531);
+                if (oldString531 instanceof Utf8) {
+                    charSequence531 = (decoder).readString(((Utf8) oldString531));
+                } else {
+                    charSequence531 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(531, charSequence531);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F531': "+ unionIndex531));
+            }
+        }
+        int unionIndex532 = (decoder.readIndex());
+        if (unionIndex532 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, null);
+        } else {
+            if (unionIndex532 == 1) {
+                Utf8 charSequence532;
+                Object oldString532 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(532);
+                if (oldString532 instanceof Utf8) {
+                    charSequence532 = (decoder).readString(((Utf8) oldString532));
+                } else {
+                    charSequence532 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(532, charSequence532);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F532': "+ unionIndex532));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema266(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex533 = (decoder.readIndex());
+        if (unionIndex533 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, null);
+        } else {
+            if (unionIndex533 == 1) {
+                Utf8 charSequence533;
+                Object oldString533 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(533);
+                if (oldString533 instanceof Utf8) {
+                    charSequence533 = (decoder).readString(((Utf8) oldString533));
+                } else {
+                    charSequence533 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(533, charSequence533);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F533': "+ unionIndex533));
+            }
+        }
+        int unionIndex534 = (decoder.readIndex());
+        if (unionIndex534 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, null);
+        } else {
+            if (unionIndex534 == 1) {
+                Utf8 charSequence534;
+                Object oldString534 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(534);
+                if (oldString534 instanceof Utf8) {
+                    charSequence534 = (decoder).readString(((Utf8) oldString534));
+                } else {
+                    charSequence534 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(534, charSequence534);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F534': "+ unionIndex534));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema267(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex535 = (decoder.readIndex());
+        if (unionIndex535 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, null);
+        } else {
+            if (unionIndex535 == 1) {
+                Utf8 charSequence535;
+                Object oldString535 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(535);
+                if (oldString535 instanceof Utf8) {
+                    charSequence535 = (decoder).readString(((Utf8) oldString535));
+                } else {
+                    charSequence535 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(535, charSequence535);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F535': "+ unionIndex535));
+            }
+        }
+        int unionIndex536 = (decoder.readIndex());
+        if (unionIndex536 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, null);
+        } else {
+            if (unionIndex536 == 1) {
+                Utf8 charSequence536;
+                Object oldString536 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(536);
+                if (oldString536 instanceof Utf8) {
+                    charSequence536 = (decoder).readString(((Utf8) oldString536));
+                } else {
+                    charSequence536 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(536, charSequence536);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F536': "+ unionIndex536));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema268(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex537 = (decoder.readIndex());
+        if (unionIndex537 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, null);
+        } else {
+            if (unionIndex537 == 1) {
+                Utf8 charSequence537;
+                Object oldString537 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(537);
+                if (oldString537 instanceof Utf8) {
+                    charSequence537 = (decoder).readString(((Utf8) oldString537));
+                } else {
+                    charSequence537 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(537, charSequence537);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F537': "+ unionIndex537));
+            }
+        }
+        int unionIndex538 = (decoder.readIndex());
+        if (unionIndex538 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, null);
+        } else {
+            if (unionIndex538 == 1) {
+                Utf8 charSequence538;
+                Object oldString538 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(538);
+                if (oldString538 instanceof Utf8) {
+                    charSequence538 = (decoder).readString(((Utf8) oldString538));
+                } else {
+                    charSequence538 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(538, charSequence538);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F538': "+ unionIndex538));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema269(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex539 = (decoder.readIndex());
+        if (unionIndex539 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, null);
+        } else {
+            if (unionIndex539 == 1) {
+                Utf8 charSequence539;
+                Object oldString539 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(539);
+                if (oldString539 instanceof Utf8) {
+                    charSequence539 = (decoder).readString(((Utf8) oldString539));
+                } else {
+                    charSequence539 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(539, charSequence539);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F539': "+ unionIndex539));
+            }
+        }
+        int unionIndex540 = (decoder.readIndex());
+        if (unionIndex540 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, null);
+        } else {
+            if (unionIndex540 == 1) {
+                Utf8 charSequence540;
+                Object oldString540 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(540);
+                if (oldString540 instanceof Utf8) {
+                    charSequence540 = (decoder).readString(((Utf8) oldString540));
+                } else {
+                    charSequence540 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(540, charSequence540);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F540': "+ unionIndex540));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema270(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex541 = (decoder.readIndex());
+        if (unionIndex541 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, null);
+        } else {
+            if (unionIndex541 == 1) {
+                Utf8 charSequence541;
+                Object oldString541 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(541);
+                if (oldString541 instanceof Utf8) {
+                    charSequence541 = (decoder).readString(((Utf8) oldString541));
+                } else {
+                    charSequence541 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(541, charSequence541);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F541': "+ unionIndex541));
+            }
+        }
+        int unionIndex542 = (decoder.readIndex());
+        if (unionIndex542 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, null);
+        } else {
+            if (unionIndex542 == 1) {
+                Utf8 charSequence542;
+                Object oldString542 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(542);
+                if (oldString542 instanceof Utf8) {
+                    charSequence542 = (decoder).readString(((Utf8) oldString542));
+                } else {
+                    charSequence542 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(542, charSequence542);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F542': "+ unionIndex542));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema271(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex543 = (decoder.readIndex());
+        if (unionIndex543 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, null);
+        } else {
+            if (unionIndex543 == 1) {
+                Utf8 charSequence543;
+                Object oldString543 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(543);
+                if (oldString543 instanceof Utf8) {
+                    charSequence543 = (decoder).readString(((Utf8) oldString543));
+                } else {
+                    charSequence543 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(543, charSequence543);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F543': "+ unionIndex543));
+            }
+        }
+        int unionIndex544 = (decoder.readIndex());
+        if (unionIndex544 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, null);
+        } else {
+            if (unionIndex544 == 1) {
+                Utf8 charSequence544;
+                Object oldString544 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(544);
+                if (oldString544 instanceof Utf8) {
+                    charSequence544 = (decoder).readString(((Utf8) oldString544));
+                } else {
+                    charSequence544 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(544, charSequence544);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F544': "+ unionIndex544));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema272(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex545 = (decoder.readIndex());
+        if (unionIndex545 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, null);
+        } else {
+            if (unionIndex545 == 1) {
+                Utf8 charSequence545;
+                Object oldString545 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(545);
+                if (oldString545 instanceof Utf8) {
+                    charSequence545 = (decoder).readString(((Utf8) oldString545));
+                } else {
+                    charSequence545 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(545, charSequence545);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F545': "+ unionIndex545));
+            }
+        }
+        int unionIndex546 = (decoder.readIndex());
+        if (unionIndex546 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, null);
+        } else {
+            if (unionIndex546 == 1) {
+                Utf8 charSequence546;
+                Object oldString546 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(546);
+                if (oldString546 instanceof Utf8) {
+                    charSequence546 = (decoder).readString(((Utf8) oldString546));
+                } else {
+                    charSequence546 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(546, charSequence546);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F546': "+ unionIndex546));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema273(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex547 = (decoder.readIndex());
+        if (unionIndex547 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, null);
+        } else {
+            if (unionIndex547 == 1) {
+                Utf8 charSequence547;
+                Object oldString547 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(547);
+                if (oldString547 instanceof Utf8) {
+                    charSequence547 = (decoder).readString(((Utf8) oldString547));
+                } else {
+                    charSequence547 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(547, charSequence547);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F547': "+ unionIndex547));
+            }
+        }
+        int unionIndex548 = (decoder.readIndex());
+        if (unionIndex548 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, null);
+        } else {
+            if (unionIndex548 == 1) {
+                Utf8 charSequence548;
+                Object oldString548 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(548);
+                if (oldString548 instanceof Utf8) {
+                    charSequence548 = (decoder).readString(((Utf8) oldString548));
+                } else {
+                    charSequence548 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(548, charSequence548);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F548': "+ unionIndex548));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema274(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex549 = (decoder.readIndex());
+        if (unionIndex549 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, null);
+        } else {
+            if (unionIndex549 == 1) {
+                Utf8 charSequence549;
+                Object oldString549 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(549);
+                if (oldString549 instanceof Utf8) {
+                    charSequence549 = (decoder).readString(((Utf8) oldString549));
+                } else {
+                    charSequence549 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(549, charSequence549);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F549': "+ unionIndex549));
+            }
+        }
+        int unionIndex550 = (decoder.readIndex());
+        if (unionIndex550 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, null);
+        } else {
+            if (unionIndex550 == 1) {
+                Utf8 charSequence550;
+                Object oldString550 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(550);
+                if (oldString550 instanceof Utf8) {
+                    charSequence550 = (decoder).readString(((Utf8) oldString550));
+                } else {
+                    charSequence550 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(550, charSequence550);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F550': "+ unionIndex550));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema275(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex551 = (decoder.readIndex());
+        if (unionIndex551 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, null);
+        } else {
+            if (unionIndex551 == 1) {
+                Utf8 charSequence551;
+                Object oldString551 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(551);
+                if (oldString551 instanceof Utf8) {
+                    charSequence551 = (decoder).readString(((Utf8) oldString551));
+                } else {
+                    charSequence551 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(551, charSequence551);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F551': "+ unionIndex551));
+            }
+        }
+        int unionIndex552 = (decoder.readIndex());
+        if (unionIndex552 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, null);
+        } else {
+            if (unionIndex552 == 1) {
+                Utf8 charSequence552;
+                Object oldString552 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(552);
+                if (oldString552 instanceof Utf8) {
+                    charSequence552 = (decoder).readString(((Utf8) oldString552));
+                } else {
+                    charSequence552 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(552, charSequence552);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F552': "+ unionIndex552));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema276(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex553 = (decoder.readIndex());
+        if (unionIndex553 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, null);
+        } else {
+            if (unionIndex553 == 1) {
+                Utf8 charSequence553;
+                Object oldString553 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(553);
+                if (oldString553 instanceof Utf8) {
+                    charSequence553 = (decoder).readString(((Utf8) oldString553));
+                } else {
+                    charSequence553 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(553, charSequence553);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F553': "+ unionIndex553));
+            }
+        }
+        int unionIndex554 = (decoder.readIndex());
+        if (unionIndex554 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, null);
+        } else {
+            if (unionIndex554 == 1) {
+                Utf8 charSequence554;
+                Object oldString554 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(554);
+                if (oldString554 instanceof Utf8) {
+                    charSequence554 = (decoder).readString(((Utf8) oldString554));
+                } else {
+                    charSequence554 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(554, charSequence554);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F554': "+ unionIndex554));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema277(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex555 = (decoder.readIndex());
+        if (unionIndex555 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, null);
+        } else {
+            if (unionIndex555 == 1) {
+                Utf8 charSequence555;
+                Object oldString555 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(555);
+                if (oldString555 instanceof Utf8) {
+                    charSequence555 = (decoder).readString(((Utf8) oldString555));
+                } else {
+                    charSequence555 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(555, charSequence555);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F555': "+ unionIndex555));
+            }
+        }
+        int unionIndex556 = (decoder.readIndex());
+        if (unionIndex556 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, null);
+        } else {
+            if (unionIndex556 == 1) {
+                Utf8 charSequence556;
+                Object oldString556 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(556);
+                if (oldString556 instanceof Utf8) {
+                    charSequence556 = (decoder).readString(((Utf8) oldString556));
+                } else {
+                    charSequence556 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(556, charSequence556);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F556': "+ unionIndex556));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema278(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex557 = (decoder.readIndex());
+        if (unionIndex557 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, null);
+        } else {
+            if (unionIndex557 == 1) {
+                Utf8 charSequence557;
+                Object oldString557 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(557);
+                if (oldString557 instanceof Utf8) {
+                    charSequence557 = (decoder).readString(((Utf8) oldString557));
+                } else {
+                    charSequence557 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(557, charSequence557);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F557': "+ unionIndex557));
+            }
+        }
+        int unionIndex558 = (decoder.readIndex());
+        if (unionIndex558 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, null);
+        } else {
+            if (unionIndex558 == 1) {
+                Utf8 charSequence558;
+                Object oldString558 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(558);
+                if (oldString558 instanceof Utf8) {
+                    charSequence558 = (decoder).readString(((Utf8) oldString558));
+                } else {
+                    charSequence558 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(558, charSequence558);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F558': "+ unionIndex558));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema279(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex559 = (decoder.readIndex());
+        if (unionIndex559 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, null);
+        } else {
+            if (unionIndex559 == 1) {
+                Utf8 charSequence559;
+                Object oldString559 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(559);
+                if (oldString559 instanceof Utf8) {
+                    charSequence559 = (decoder).readString(((Utf8) oldString559));
+                } else {
+                    charSequence559 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(559, charSequence559);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F559': "+ unionIndex559));
+            }
+        }
+        int unionIndex560 = (decoder.readIndex());
+        if (unionIndex560 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, null);
+        } else {
+            if (unionIndex560 == 1) {
+                Utf8 charSequence560;
+                Object oldString560 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(560);
+                if (oldString560 instanceof Utf8) {
+                    charSequence560 = (decoder).readString(((Utf8) oldString560));
+                } else {
+                    charSequence560 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(560, charSequence560);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F560': "+ unionIndex560));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema280(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex561 = (decoder.readIndex());
+        if (unionIndex561 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, null);
+        } else {
+            if (unionIndex561 == 1) {
+                Utf8 charSequence561;
+                Object oldString561 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(561);
+                if (oldString561 instanceof Utf8) {
+                    charSequence561 = (decoder).readString(((Utf8) oldString561));
+                } else {
+                    charSequence561 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(561, charSequence561);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F561': "+ unionIndex561));
+            }
+        }
+        int unionIndex562 = (decoder.readIndex());
+        if (unionIndex562 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, null);
+        } else {
+            if (unionIndex562 == 1) {
+                Utf8 charSequence562;
+                Object oldString562 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(562);
+                if (oldString562 instanceof Utf8) {
+                    charSequence562 = (decoder).readString(((Utf8) oldString562));
+                } else {
+                    charSequence562 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(562, charSequence562);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F562': "+ unionIndex562));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema281(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex563 = (decoder.readIndex());
+        if (unionIndex563 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, null);
+        } else {
+            if (unionIndex563 == 1) {
+                Utf8 charSequence563;
+                Object oldString563 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(563);
+                if (oldString563 instanceof Utf8) {
+                    charSequence563 = (decoder).readString(((Utf8) oldString563));
+                } else {
+                    charSequence563 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(563, charSequence563);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F563': "+ unionIndex563));
+            }
+        }
+        int unionIndex564 = (decoder.readIndex());
+        if (unionIndex564 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, null);
+        } else {
+            if (unionIndex564 == 1) {
+                Utf8 charSequence564;
+                Object oldString564 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(564);
+                if (oldString564 instanceof Utf8) {
+                    charSequence564 = (decoder).readString(((Utf8) oldString564));
+                } else {
+                    charSequence564 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(564, charSequence564);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F564': "+ unionIndex564));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema282(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex565 = (decoder.readIndex());
+        if (unionIndex565 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, null);
+        } else {
+            if (unionIndex565 == 1) {
+                Utf8 charSequence565;
+                Object oldString565 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(565);
+                if (oldString565 instanceof Utf8) {
+                    charSequence565 = (decoder).readString(((Utf8) oldString565));
+                } else {
+                    charSequence565 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(565, charSequence565);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F565': "+ unionIndex565));
+            }
+        }
+        int unionIndex566 = (decoder.readIndex());
+        if (unionIndex566 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, null);
+        } else {
+            if (unionIndex566 == 1) {
+                Utf8 charSequence566;
+                Object oldString566 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(566);
+                if (oldString566 instanceof Utf8) {
+                    charSequence566 = (decoder).readString(((Utf8) oldString566));
+                } else {
+                    charSequence566 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(566, charSequence566);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F566': "+ unionIndex566));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema283(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex567 = (decoder.readIndex());
+        if (unionIndex567 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, null);
+        } else {
+            if (unionIndex567 == 1) {
+                Utf8 charSequence567;
+                Object oldString567 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(567);
+                if (oldString567 instanceof Utf8) {
+                    charSequence567 = (decoder).readString(((Utf8) oldString567));
+                } else {
+                    charSequence567 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(567, charSequence567);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F567': "+ unionIndex567));
+            }
+        }
+        int unionIndex568 = (decoder.readIndex());
+        if (unionIndex568 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, null);
+        } else {
+            if (unionIndex568 == 1) {
+                Utf8 charSequence568;
+                Object oldString568 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(568);
+                if (oldString568 instanceof Utf8) {
+                    charSequence568 = (decoder).readString(((Utf8) oldString568));
+                } else {
+                    charSequence568 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(568, charSequence568);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F568': "+ unionIndex568));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema284(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex569 = (decoder.readIndex());
+        if (unionIndex569 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, null);
+        } else {
+            if (unionIndex569 == 1) {
+                Utf8 charSequence569;
+                Object oldString569 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(569);
+                if (oldString569 instanceof Utf8) {
+                    charSequence569 = (decoder).readString(((Utf8) oldString569));
+                } else {
+                    charSequence569 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(569, charSequence569);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F569': "+ unionIndex569));
+            }
+        }
+        int unionIndex570 = (decoder.readIndex());
+        if (unionIndex570 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, null);
+        } else {
+            if (unionIndex570 == 1) {
+                Utf8 charSequence570;
+                Object oldString570 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(570);
+                if (oldString570 instanceof Utf8) {
+                    charSequence570 = (decoder).readString(((Utf8) oldString570));
+                } else {
+                    charSequence570 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(570, charSequence570);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F570': "+ unionIndex570));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema285(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex571 = (decoder.readIndex());
+        if (unionIndex571 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, null);
+        } else {
+            if (unionIndex571 == 1) {
+                Utf8 charSequence571;
+                Object oldString571 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(571);
+                if (oldString571 instanceof Utf8) {
+                    charSequence571 = (decoder).readString(((Utf8) oldString571));
+                } else {
+                    charSequence571 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(571, charSequence571);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F571': "+ unionIndex571));
+            }
+        }
+        int unionIndex572 = (decoder.readIndex());
+        if (unionIndex572 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, null);
+        } else {
+            if (unionIndex572 == 1) {
+                Utf8 charSequence572;
+                Object oldString572 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(572);
+                if (oldString572 instanceof Utf8) {
+                    charSequence572 = (decoder).readString(((Utf8) oldString572));
+                } else {
+                    charSequence572 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(572, charSequence572);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F572': "+ unionIndex572));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema286(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex573 = (decoder.readIndex());
+        if (unionIndex573 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, null);
+        } else {
+            if (unionIndex573 == 1) {
+                Utf8 charSequence573;
+                Object oldString573 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(573);
+                if (oldString573 instanceof Utf8) {
+                    charSequence573 = (decoder).readString(((Utf8) oldString573));
+                } else {
+                    charSequence573 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(573, charSequence573);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F573': "+ unionIndex573));
+            }
+        }
+        int unionIndex574 = (decoder.readIndex());
+        if (unionIndex574 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, null);
+        } else {
+            if (unionIndex574 == 1) {
+                Utf8 charSequence574;
+                Object oldString574 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(574);
+                if (oldString574 instanceof Utf8) {
+                    charSequence574 = (decoder).readString(((Utf8) oldString574));
+                } else {
+                    charSequence574 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(574, charSequence574);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F574': "+ unionIndex574));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema287(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex575 = (decoder.readIndex());
+        if (unionIndex575 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, null);
+        } else {
+            if (unionIndex575 == 1) {
+                Utf8 charSequence575;
+                Object oldString575 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(575);
+                if (oldString575 instanceof Utf8) {
+                    charSequence575 = (decoder).readString(((Utf8) oldString575));
+                } else {
+                    charSequence575 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(575, charSequence575);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F575': "+ unionIndex575));
+            }
+        }
+        int unionIndex576 = (decoder.readIndex());
+        if (unionIndex576 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, null);
+        } else {
+            if (unionIndex576 == 1) {
+                Utf8 charSequence576;
+                Object oldString576 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(576);
+                if (oldString576 instanceof Utf8) {
+                    charSequence576 = (decoder).readString(((Utf8) oldString576));
+                } else {
+                    charSequence576 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(576, charSequence576);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F576': "+ unionIndex576));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema288(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex577 = (decoder.readIndex());
+        if (unionIndex577 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, null);
+        } else {
+            if (unionIndex577 == 1) {
+                Utf8 charSequence577;
+                Object oldString577 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(577);
+                if (oldString577 instanceof Utf8) {
+                    charSequence577 = (decoder).readString(((Utf8) oldString577));
+                } else {
+                    charSequence577 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(577, charSequence577);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F577': "+ unionIndex577));
+            }
+        }
+        int unionIndex578 = (decoder.readIndex());
+        if (unionIndex578 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, null);
+        } else {
+            if (unionIndex578 == 1) {
+                Utf8 charSequence578;
+                Object oldString578 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(578);
+                if (oldString578 instanceof Utf8) {
+                    charSequence578 = (decoder).readString(((Utf8) oldString578));
+                } else {
+                    charSequence578 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(578, charSequence578);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F578': "+ unionIndex578));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema289(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex579 = (decoder.readIndex());
+        if (unionIndex579 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, null);
+        } else {
+            if (unionIndex579 == 1) {
+                Utf8 charSequence579;
+                Object oldString579 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(579);
+                if (oldString579 instanceof Utf8) {
+                    charSequence579 = (decoder).readString(((Utf8) oldString579));
+                } else {
+                    charSequence579 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(579, charSequence579);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F579': "+ unionIndex579));
+            }
+        }
+        int unionIndex580 = (decoder.readIndex());
+        if (unionIndex580 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, null);
+        } else {
+            if (unionIndex580 == 1) {
+                Utf8 charSequence580;
+                Object oldString580 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(580);
+                if (oldString580 instanceof Utf8) {
+                    charSequence580 = (decoder).readString(((Utf8) oldString580));
+                } else {
+                    charSequence580 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(580, charSequence580);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F580': "+ unionIndex580));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema290(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex581 = (decoder.readIndex());
+        if (unionIndex581 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, null);
+        } else {
+            if (unionIndex581 == 1) {
+                Utf8 charSequence581;
+                Object oldString581 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(581);
+                if (oldString581 instanceof Utf8) {
+                    charSequence581 = (decoder).readString(((Utf8) oldString581));
+                } else {
+                    charSequence581 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(581, charSequence581);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F581': "+ unionIndex581));
+            }
+        }
+        int unionIndex582 = (decoder.readIndex());
+        if (unionIndex582 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, null);
+        } else {
+            if (unionIndex582 == 1) {
+                Utf8 charSequence582;
+                Object oldString582 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(582);
+                if (oldString582 instanceof Utf8) {
+                    charSequence582 = (decoder).readString(((Utf8) oldString582));
+                } else {
+                    charSequence582 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(582, charSequence582);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F582': "+ unionIndex582));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema291(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex583 = (decoder.readIndex());
+        if (unionIndex583 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, null);
+        } else {
+            if (unionIndex583 == 1) {
+                Utf8 charSequence583;
+                Object oldString583 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(583);
+                if (oldString583 instanceof Utf8) {
+                    charSequence583 = (decoder).readString(((Utf8) oldString583));
+                } else {
+                    charSequence583 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(583, charSequence583);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F583': "+ unionIndex583));
+            }
+        }
+        int unionIndex584 = (decoder.readIndex());
+        if (unionIndex584 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, null);
+        } else {
+            if (unionIndex584 == 1) {
+                Utf8 charSequence584;
+                Object oldString584 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(584);
+                if (oldString584 instanceof Utf8) {
+                    charSequence584 = (decoder).readString(((Utf8) oldString584));
+                } else {
+                    charSequence584 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(584, charSequence584);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F584': "+ unionIndex584));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema292(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex585 = (decoder.readIndex());
+        if (unionIndex585 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, null);
+        } else {
+            if (unionIndex585 == 1) {
+                Utf8 charSequence585;
+                Object oldString585 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(585);
+                if (oldString585 instanceof Utf8) {
+                    charSequence585 = (decoder).readString(((Utf8) oldString585));
+                } else {
+                    charSequence585 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(585, charSequence585);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F585': "+ unionIndex585));
+            }
+        }
+        int unionIndex586 = (decoder.readIndex());
+        if (unionIndex586 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, null);
+        } else {
+            if (unionIndex586 == 1) {
+                Utf8 charSequence586;
+                Object oldString586 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(586);
+                if (oldString586 instanceof Utf8) {
+                    charSequence586 = (decoder).readString(((Utf8) oldString586));
+                } else {
+                    charSequence586 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(586, charSequence586);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F586': "+ unionIndex586));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema293(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex587 = (decoder.readIndex());
+        if (unionIndex587 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, null);
+        } else {
+            if (unionIndex587 == 1) {
+                Utf8 charSequence587;
+                Object oldString587 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(587);
+                if (oldString587 instanceof Utf8) {
+                    charSequence587 = (decoder).readString(((Utf8) oldString587));
+                } else {
+                    charSequence587 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(587, charSequence587);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F587': "+ unionIndex587));
+            }
+        }
+        int unionIndex588 = (decoder.readIndex());
+        if (unionIndex588 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, null);
+        } else {
+            if (unionIndex588 == 1) {
+                Utf8 charSequence588;
+                Object oldString588 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(588);
+                if (oldString588 instanceof Utf8) {
+                    charSequence588 = (decoder).readString(((Utf8) oldString588));
+                } else {
+                    charSequence588 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(588, charSequence588);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F588': "+ unionIndex588));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema294(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex589 = (decoder.readIndex());
+        if (unionIndex589 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, null);
+        } else {
+            if (unionIndex589 == 1) {
+                Utf8 charSequence589;
+                Object oldString589 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(589);
+                if (oldString589 instanceof Utf8) {
+                    charSequence589 = (decoder).readString(((Utf8) oldString589));
+                } else {
+                    charSequence589 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(589, charSequence589);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F589': "+ unionIndex589));
+            }
+        }
+        int unionIndex590 = (decoder.readIndex());
+        if (unionIndex590 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, null);
+        } else {
+            if (unionIndex590 == 1) {
+                Utf8 charSequence590;
+                Object oldString590 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(590);
+                if (oldString590 instanceof Utf8) {
+                    charSequence590 = (decoder).readString(((Utf8) oldString590));
+                } else {
+                    charSequence590 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(590, charSequence590);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F590': "+ unionIndex590));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema295(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex591 = (decoder.readIndex());
+        if (unionIndex591 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, null);
+        } else {
+            if (unionIndex591 == 1) {
+                Utf8 charSequence591;
+                Object oldString591 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(591);
+                if (oldString591 instanceof Utf8) {
+                    charSequence591 = (decoder).readString(((Utf8) oldString591));
+                } else {
+                    charSequence591 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(591, charSequence591);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F591': "+ unionIndex591));
+            }
+        }
+        int unionIndex592 = (decoder.readIndex());
+        if (unionIndex592 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, null);
+        } else {
+            if (unionIndex592 == 1) {
+                Utf8 charSequence592;
+                Object oldString592 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(592);
+                if (oldString592 instanceof Utf8) {
+                    charSequence592 = (decoder).readString(((Utf8) oldString592));
+                } else {
+                    charSequence592 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(592, charSequence592);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F592': "+ unionIndex592));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema296(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex593 = (decoder.readIndex());
+        if (unionIndex593 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, null);
+        } else {
+            if (unionIndex593 == 1) {
+                Utf8 charSequence593;
+                Object oldString593 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(593);
+                if (oldString593 instanceof Utf8) {
+                    charSequence593 = (decoder).readString(((Utf8) oldString593));
+                } else {
+                    charSequence593 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(593, charSequence593);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F593': "+ unionIndex593));
+            }
+        }
+        int unionIndex594 = (decoder.readIndex());
+        if (unionIndex594 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, null);
+        } else {
+            if (unionIndex594 == 1) {
+                Utf8 charSequence594;
+                Object oldString594 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(594);
+                if (oldString594 instanceof Utf8) {
+                    charSequence594 = (decoder).readString(((Utf8) oldString594));
+                } else {
+                    charSequence594 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(594, charSequence594);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F594': "+ unionIndex594));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema297(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex595 = (decoder.readIndex());
+        if (unionIndex595 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, null);
+        } else {
+            if (unionIndex595 == 1) {
+                Utf8 charSequence595;
+                Object oldString595 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(595);
+                if (oldString595 instanceof Utf8) {
+                    charSequence595 = (decoder).readString(((Utf8) oldString595));
+                } else {
+                    charSequence595 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(595, charSequence595);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F595': "+ unionIndex595));
+            }
+        }
+        int unionIndex596 = (decoder.readIndex());
+        if (unionIndex596 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, null);
+        } else {
+            if (unionIndex596 == 1) {
+                Utf8 charSequence596;
+                Object oldString596 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(596);
+                if (oldString596 instanceof Utf8) {
+                    charSequence596 = (decoder).readString(((Utf8) oldString596));
+                } else {
+                    charSequence596 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(596, charSequence596);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F596': "+ unionIndex596));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema298(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex597 = (decoder.readIndex());
+        if (unionIndex597 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, null);
+        } else {
+            if (unionIndex597 == 1) {
+                Utf8 charSequence597;
+                Object oldString597 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(597);
+                if (oldString597 instanceof Utf8) {
+                    charSequence597 = (decoder).readString(((Utf8) oldString597));
+                } else {
+                    charSequence597 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(597, charSequence597);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F597': "+ unionIndex597));
+            }
+        }
+        int unionIndex598 = (decoder.readIndex());
+        if (unionIndex598 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, null);
+        } else {
+            if (unionIndex598 == 1) {
+                Utf8 charSequence598;
+                Object oldString598 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(598);
+                if (oldString598 instanceof Utf8) {
+                    charSequence598 = (decoder).readString(((Utf8) oldString598));
+                } else {
+                    charSequence598 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(598, charSequence598);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F598': "+ unionIndex598));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema299(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex599 = (decoder.readIndex());
+        if (unionIndex599 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, null);
+        } else {
+            if (unionIndex599 == 1) {
+                Utf8 charSequence599;
+                Object oldString599 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(599);
+                if (oldString599 instanceof Utf8) {
+                    charSequence599 = (decoder).readString(((Utf8) oldString599));
+                } else {
+                    charSequence599 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(599, charSequence599);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F599': "+ unionIndex599));
+            }
+        }
+        int unionIndex600 = (decoder.readIndex());
+        if (unionIndex600 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, null);
+        } else {
+            if (unionIndex600 == 1) {
+                Utf8 charSequence600;
+                Object oldString600 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(600);
+                if (oldString600 instanceof Utf8) {
+                    charSequence600 = (decoder).readString(((Utf8) oldString600));
+                } else {
+                    charSequence600 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(600, charSequence600);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F600': "+ unionIndex600));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema300(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex601 = (decoder.readIndex());
+        if (unionIndex601 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, null);
+        } else {
+            if (unionIndex601 == 1) {
+                Utf8 charSequence601;
+                Object oldString601 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(601);
+                if (oldString601 instanceof Utf8) {
+                    charSequence601 = (decoder).readString(((Utf8) oldString601));
+                } else {
+                    charSequence601 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(601, charSequence601);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F601': "+ unionIndex601));
+            }
+        }
+        int unionIndex602 = (decoder.readIndex());
+        if (unionIndex602 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, null);
+        } else {
+            if (unionIndex602 == 1) {
+                Utf8 charSequence602;
+                Object oldString602 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(602);
+                if (oldString602 instanceof Utf8) {
+                    charSequence602 = (decoder).readString(((Utf8) oldString602));
+                } else {
+                    charSequence602 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(602, charSequence602);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F602': "+ unionIndex602));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema301(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex603 = (decoder.readIndex());
+        if (unionIndex603 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, null);
+        } else {
+            if (unionIndex603 == 1) {
+                Utf8 charSequence603;
+                Object oldString603 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(603);
+                if (oldString603 instanceof Utf8) {
+                    charSequence603 = (decoder).readString(((Utf8) oldString603));
+                } else {
+                    charSequence603 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(603, charSequence603);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F603': "+ unionIndex603));
+            }
+        }
+        int unionIndex604 = (decoder.readIndex());
+        if (unionIndex604 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, null);
+        } else {
+            if (unionIndex604 == 1) {
+                Utf8 charSequence604;
+                Object oldString604 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(604);
+                if (oldString604 instanceof Utf8) {
+                    charSequence604 = (decoder).readString(((Utf8) oldString604));
+                } else {
+                    charSequence604 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(604, charSequence604);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F604': "+ unionIndex604));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema302(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex605 = (decoder.readIndex());
+        if (unionIndex605 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, null);
+        } else {
+            if (unionIndex605 == 1) {
+                Utf8 charSequence605;
+                Object oldString605 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(605);
+                if (oldString605 instanceof Utf8) {
+                    charSequence605 = (decoder).readString(((Utf8) oldString605));
+                } else {
+                    charSequence605 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(605, charSequence605);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F605': "+ unionIndex605));
+            }
+        }
+        int unionIndex606 = (decoder.readIndex());
+        if (unionIndex606 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, null);
+        } else {
+            if (unionIndex606 == 1) {
+                Utf8 charSequence606;
+                Object oldString606 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(606);
+                if (oldString606 instanceof Utf8) {
+                    charSequence606 = (decoder).readString(((Utf8) oldString606));
+                } else {
+                    charSequence606 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(606, charSequence606);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F606': "+ unionIndex606));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema303(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex607 = (decoder.readIndex());
+        if (unionIndex607 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, null);
+        } else {
+            if (unionIndex607 == 1) {
+                Utf8 charSequence607;
+                Object oldString607 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(607);
+                if (oldString607 instanceof Utf8) {
+                    charSequence607 = (decoder).readString(((Utf8) oldString607));
+                } else {
+                    charSequence607 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(607, charSequence607);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F607': "+ unionIndex607));
+            }
+        }
+        int unionIndex608 = (decoder.readIndex());
+        if (unionIndex608 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, null);
+        } else {
+            if (unionIndex608 == 1) {
+                Utf8 charSequence608;
+                Object oldString608 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(608);
+                if (oldString608 instanceof Utf8) {
+                    charSequence608 = (decoder).readString(((Utf8) oldString608));
+                } else {
+                    charSequence608 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(608, charSequence608);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F608': "+ unionIndex608));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema304(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex609 = (decoder.readIndex());
+        if (unionIndex609 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, null);
+        } else {
+            if (unionIndex609 == 1) {
+                Utf8 charSequence609;
+                Object oldString609 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(609);
+                if (oldString609 instanceof Utf8) {
+                    charSequence609 = (decoder).readString(((Utf8) oldString609));
+                } else {
+                    charSequence609 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(609, charSequence609);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F609': "+ unionIndex609));
+            }
+        }
+        int unionIndex610 = (decoder.readIndex());
+        if (unionIndex610 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, null);
+        } else {
+            if (unionIndex610 == 1) {
+                Utf8 charSequence610;
+                Object oldString610 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(610);
+                if (oldString610 instanceof Utf8) {
+                    charSequence610 = (decoder).readString(((Utf8) oldString610));
+                } else {
+                    charSequence610 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(610, charSequence610);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F610': "+ unionIndex610));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema305(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex611 = (decoder.readIndex());
+        if (unionIndex611 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, null);
+        } else {
+            if (unionIndex611 == 1) {
+                Utf8 charSequence611;
+                Object oldString611 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(611);
+                if (oldString611 instanceof Utf8) {
+                    charSequence611 = (decoder).readString(((Utf8) oldString611));
+                } else {
+                    charSequence611 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(611, charSequence611);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F611': "+ unionIndex611));
+            }
+        }
+        int unionIndex612 = (decoder.readIndex());
+        if (unionIndex612 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, null);
+        } else {
+            if (unionIndex612 == 1) {
+                Utf8 charSequence612;
+                Object oldString612 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(612);
+                if (oldString612 instanceof Utf8) {
+                    charSequence612 = (decoder).readString(((Utf8) oldString612));
+                } else {
+                    charSequence612 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(612, charSequence612);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F612': "+ unionIndex612));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema306(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex613 = (decoder.readIndex());
+        if (unionIndex613 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, null);
+        } else {
+            if (unionIndex613 == 1) {
+                Utf8 charSequence613;
+                Object oldString613 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(613);
+                if (oldString613 instanceof Utf8) {
+                    charSequence613 = (decoder).readString(((Utf8) oldString613));
+                } else {
+                    charSequence613 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(613, charSequence613);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F613': "+ unionIndex613));
+            }
+        }
+        int unionIndex614 = (decoder.readIndex());
+        if (unionIndex614 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, null);
+        } else {
+            if (unionIndex614 == 1) {
+                Utf8 charSequence614;
+                Object oldString614 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(614);
+                if (oldString614 instanceof Utf8) {
+                    charSequence614 = (decoder).readString(((Utf8) oldString614));
+                } else {
+                    charSequence614 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(614, charSequence614);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F614': "+ unionIndex614));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema307(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex615 = (decoder.readIndex());
+        if (unionIndex615 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, null);
+        } else {
+            if (unionIndex615 == 1) {
+                Utf8 charSequence615;
+                Object oldString615 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(615);
+                if (oldString615 instanceof Utf8) {
+                    charSequence615 = (decoder).readString(((Utf8) oldString615));
+                } else {
+                    charSequence615 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(615, charSequence615);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F615': "+ unionIndex615));
+            }
+        }
+        int unionIndex616 = (decoder.readIndex());
+        if (unionIndex616 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, null);
+        } else {
+            if (unionIndex616 == 1) {
+                Utf8 charSequence616;
+                Object oldString616 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(616);
+                if (oldString616 instanceof Utf8) {
+                    charSequence616 = (decoder).readString(((Utf8) oldString616));
+                } else {
+                    charSequence616 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(616, charSequence616);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F616': "+ unionIndex616));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema308(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex617 = (decoder.readIndex());
+        if (unionIndex617 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, null);
+        } else {
+            if (unionIndex617 == 1) {
+                Utf8 charSequence617;
+                Object oldString617 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(617);
+                if (oldString617 instanceof Utf8) {
+                    charSequence617 = (decoder).readString(((Utf8) oldString617));
+                } else {
+                    charSequence617 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(617, charSequence617);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F617': "+ unionIndex617));
+            }
+        }
+        int unionIndex618 = (decoder.readIndex());
+        if (unionIndex618 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, null);
+        } else {
+            if (unionIndex618 == 1) {
+                Utf8 charSequence618;
+                Object oldString618 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(618);
+                if (oldString618 instanceof Utf8) {
+                    charSequence618 = (decoder).readString(((Utf8) oldString618));
+                } else {
+                    charSequence618 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(618, charSequence618);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F618': "+ unionIndex618));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema309(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex619 = (decoder.readIndex());
+        if (unionIndex619 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, null);
+        } else {
+            if (unionIndex619 == 1) {
+                Utf8 charSequence619;
+                Object oldString619 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(619);
+                if (oldString619 instanceof Utf8) {
+                    charSequence619 = (decoder).readString(((Utf8) oldString619));
+                } else {
+                    charSequence619 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(619, charSequence619);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F619': "+ unionIndex619));
+            }
+        }
+        int unionIndex620 = (decoder.readIndex());
+        if (unionIndex620 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, null);
+        } else {
+            if (unionIndex620 == 1) {
+                Utf8 charSequence620;
+                Object oldString620 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(620);
+                if (oldString620 instanceof Utf8) {
+                    charSequence620 = (decoder).readString(((Utf8) oldString620));
+                } else {
+                    charSequence620 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(620, charSequence620);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F620': "+ unionIndex620));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema310(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex621 = (decoder.readIndex());
+        if (unionIndex621 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, null);
+        } else {
+            if (unionIndex621 == 1) {
+                Utf8 charSequence621;
+                Object oldString621 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(621);
+                if (oldString621 instanceof Utf8) {
+                    charSequence621 = (decoder).readString(((Utf8) oldString621));
+                } else {
+                    charSequence621 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(621, charSequence621);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F621': "+ unionIndex621));
+            }
+        }
+        int unionIndex622 = (decoder.readIndex());
+        if (unionIndex622 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, null);
+        } else {
+            if (unionIndex622 == 1) {
+                Utf8 charSequence622;
+                Object oldString622 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(622);
+                if (oldString622 instanceof Utf8) {
+                    charSequence622 = (decoder).readString(((Utf8) oldString622));
+                } else {
+                    charSequence622 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(622, charSequence622);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F622': "+ unionIndex622));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema311(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex623 = (decoder.readIndex());
+        if (unionIndex623 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, null);
+        } else {
+            if (unionIndex623 == 1) {
+                Utf8 charSequence623;
+                Object oldString623 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(623);
+                if (oldString623 instanceof Utf8) {
+                    charSequence623 = (decoder).readString(((Utf8) oldString623));
+                } else {
+                    charSequence623 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(623, charSequence623);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F623': "+ unionIndex623));
+            }
+        }
+        int unionIndex624 = (decoder.readIndex());
+        if (unionIndex624 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, null);
+        } else {
+            if (unionIndex624 == 1) {
+                Utf8 charSequence624;
+                Object oldString624 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(624);
+                if (oldString624 instanceof Utf8) {
+                    charSequence624 = (decoder).readString(((Utf8) oldString624));
+                } else {
+                    charSequence624 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(624, charSequence624);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F624': "+ unionIndex624));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema312(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex625 = (decoder.readIndex());
+        if (unionIndex625 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, null);
+        } else {
+            if (unionIndex625 == 1) {
+                Utf8 charSequence625;
+                Object oldString625 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(625);
+                if (oldString625 instanceof Utf8) {
+                    charSequence625 = (decoder).readString(((Utf8) oldString625));
+                } else {
+                    charSequence625 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(625, charSequence625);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F625': "+ unionIndex625));
+            }
+        }
+        int unionIndex626 = (decoder.readIndex());
+        if (unionIndex626 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, null);
+        } else {
+            if (unionIndex626 == 1) {
+                Utf8 charSequence626;
+                Object oldString626 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(626);
+                if (oldString626 instanceof Utf8) {
+                    charSequence626 = (decoder).readString(((Utf8) oldString626));
+                } else {
+                    charSequence626 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(626, charSequence626);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F626': "+ unionIndex626));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema313(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex627 = (decoder.readIndex());
+        if (unionIndex627 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, null);
+        } else {
+            if (unionIndex627 == 1) {
+                Utf8 charSequence627;
+                Object oldString627 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(627);
+                if (oldString627 instanceof Utf8) {
+                    charSequence627 = (decoder).readString(((Utf8) oldString627));
+                } else {
+                    charSequence627 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(627, charSequence627);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F627': "+ unionIndex627));
+            }
+        }
+        int unionIndex628 = (decoder.readIndex());
+        if (unionIndex628 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, null);
+        } else {
+            if (unionIndex628 == 1) {
+                Utf8 charSequence628;
+                Object oldString628 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(628);
+                if (oldString628 instanceof Utf8) {
+                    charSequence628 = (decoder).readString(((Utf8) oldString628));
+                } else {
+                    charSequence628 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(628, charSequence628);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F628': "+ unionIndex628));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema314(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex629 = (decoder.readIndex());
+        if (unionIndex629 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, null);
+        } else {
+            if (unionIndex629 == 1) {
+                Utf8 charSequence629;
+                Object oldString629 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(629);
+                if (oldString629 instanceof Utf8) {
+                    charSequence629 = (decoder).readString(((Utf8) oldString629));
+                } else {
+                    charSequence629 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(629, charSequence629);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F629': "+ unionIndex629));
+            }
+        }
+        int unionIndex630 = (decoder.readIndex());
+        if (unionIndex630 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, null);
+        } else {
+            if (unionIndex630 == 1) {
+                Utf8 charSequence630;
+                Object oldString630 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(630);
+                if (oldString630 instanceof Utf8) {
+                    charSequence630 = (decoder).readString(((Utf8) oldString630));
+                } else {
+                    charSequence630 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(630, charSequence630);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F630': "+ unionIndex630));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema315(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex631 = (decoder.readIndex());
+        if (unionIndex631 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, null);
+        } else {
+            if (unionIndex631 == 1) {
+                Utf8 charSequence631;
+                Object oldString631 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(631);
+                if (oldString631 instanceof Utf8) {
+                    charSequence631 = (decoder).readString(((Utf8) oldString631));
+                } else {
+                    charSequence631 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(631, charSequence631);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F631': "+ unionIndex631));
+            }
+        }
+        int unionIndex632 = (decoder.readIndex());
+        if (unionIndex632 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, null);
+        } else {
+            if (unionIndex632 == 1) {
+                Utf8 charSequence632;
+                Object oldString632 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(632);
+                if (oldString632 instanceof Utf8) {
+                    charSequence632 = (decoder).readString(((Utf8) oldString632));
+                } else {
+                    charSequence632 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(632, charSequence632);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F632': "+ unionIndex632));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema316(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex633 = (decoder.readIndex());
+        if (unionIndex633 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, null);
+        } else {
+            if (unionIndex633 == 1) {
+                Utf8 charSequence633;
+                Object oldString633 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(633);
+                if (oldString633 instanceof Utf8) {
+                    charSequence633 = (decoder).readString(((Utf8) oldString633));
+                } else {
+                    charSequence633 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(633, charSequence633);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F633': "+ unionIndex633));
+            }
+        }
+        int unionIndex634 = (decoder.readIndex());
+        if (unionIndex634 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, null);
+        } else {
+            if (unionIndex634 == 1) {
+                Utf8 charSequence634;
+                Object oldString634 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(634);
+                if (oldString634 instanceof Utf8) {
+                    charSequence634 = (decoder).readString(((Utf8) oldString634));
+                } else {
+                    charSequence634 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(634, charSequence634);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F634': "+ unionIndex634));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema317(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex635 = (decoder.readIndex());
+        if (unionIndex635 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, null);
+        } else {
+            if (unionIndex635 == 1) {
+                Utf8 charSequence635;
+                Object oldString635 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(635);
+                if (oldString635 instanceof Utf8) {
+                    charSequence635 = (decoder).readString(((Utf8) oldString635));
+                } else {
+                    charSequence635 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(635, charSequence635);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F635': "+ unionIndex635));
+            }
+        }
+        int unionIndex636 = (decoder.readIndex());
+        if (unionIndex636 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, null);
+        } else {
+            if (unionIndex636 == 1) {
+                Utf8 charSequence636;
+                Object oldString636 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(636);
+                if (oldString636 instanceof Utf8) {
+                    charSequence636 = (decoder).readString(((Utf8) oldString636));
+                } else {
+                    charSequence636 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(636, charSequence636);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F636': "+ unionIndex636));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema318(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex637 = (decoder.readIndex());
+        if (unionIndex637 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, null);
+        } else {
+            if (unionIndex637 == 1) {
+                Utf8 charSequence637;
+                Object oldString637 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(637);
+                if (oldString637 instanceof Utf8) {
+                    charSequence637 = (decoder).readString(((Utf8) oldString637));
+                } else {
+                    charSequence637 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(637, charSequence637);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F637': "+ unionIndex637));
+            }
+        }
+        int unionIndex638 = (decoder.readIndex());
+        if (unionIndex638 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, null);
+        } else {
+            if (unionIndex638 == 1) {
+                Utf8 charSequence638;
+                Object oldString638 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(638);
+                if (oldString638 instanceof Utf8) {
+                    charSequence638 = (decoder).readString(((Utf8) oldString638));
+                } else {
+                    charSequence638 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(638, charSequence638);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F638': "+ unionIndex638));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema319(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex639 = (decoder.readIndex());
+        if (unionIndex639 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, null);
+        } else {
+            if (unionIndex639 == 1) {
+                Utf8 charSequence639;
+                Object oldString639 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(639);
+                if (oldString639 instanceof Utf8) {
+                    charSequence639 = (decoder).readString(((Utf8) oldString639));
+                } else {
+                    charSequence639 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(639, charSequence639);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F639': "+ unionIndex639));
+            }
+        }
+        int unionIndex640 = (decoder.readIndex());
+        if (unionIndex640 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, null);
+        } else {
+            if (unionIndex640 == 1) {
+                Utf8 charSequence640;
+                Object oldString640 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(640);
+                if (oldString640 instanceof Utf8) {
+                    charSequence640 = (decoder).readString(((Utf8) oldString640));
+                } else {
+                    charSequence640 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(640, charSequence640);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F640': "+ unionIndex640));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema320(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex641 = (decoder.readIndex());
+        if (unionIndex641 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, null);
+        } else {
+            if (unionIndex641 == 1) {
+                Utf8 charSequence641;
+                Object oldString641 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(641);
+                if (oldString641 instanceof Utf8) {
+                    charSequence641 = (decoder).readString(((Utf8) oldString641));
+                } else {
+                    charSequence641 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(641, charSequence641);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F641': "+ unionIndex641));
+            }
+        }
+        int unionIndex642 = (decoder.readIndex());
+        if (unionIndex642 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, null);
+        } else {
+            if (unionIndex642 == 1) {
+                Utf8 charSequence642;
+                Object oldString642 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(642);
+                if (oldString642 instanceof Utf8) {
+                    charSequence642 = (decoder).readString(((Utf8) oldString642));
+                } else {
+                    charSequence642 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(642, charSequence642);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F642': "+ unionIndex642));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema321(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex643 = (decoder.readIndex());
+        if (unionIndex643 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, null);
+        } else {
+            if (unionIndex643 == 1) {
+                Utf8 charSequence643;
+                Object oldString643 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(643);
+                if (oldString643 instanceof Utf8) {
+                    charSequence643 = (decoder).readString(((Utf8) oldString643));
+                } else {
+                    charSequence643 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(643, charSequence643);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F643': "+ unionIndex643));
+            }
+        }
+        int unionIndex644 = (decoder.readIndex());
+        if (unionIndex644 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, null);
+        } else {
+            if (unionIndex644 == 1) {
+                Utf8 charSequence644;
+                Object oldString644 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(644);
+                if (oldString644 instanceof Utf8) {
+                    charSequence644 = (decoder).readString(((Utf8) oldString644));
+                } else {
+                    charSequence644 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(644, charSequence644);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F644': "+ unionIndex644));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema322(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex645 = (decoder.readIndex());
+        if (unionIndex645 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, null);
+        } else {
+            if (unionIndex645 == 1) {
+                Utf8 charSequence645;
+                Object oldString645 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(645);
+                if (oldString645 instanceof Utf8) {
+                    charSequence645 = (decoder).readString(((Utf8) oldString645));
+                } else {
+                    charSequence645 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(645, charSequence645);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F645': "+ unionIndex645));
+            }
+        }
+        int unionIndex646 = (decoder.readIndex());
+        if (unionIndex646 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, null);
+        } else {
+            if (unionIndex646 == 1) {
+                Utf8 charSequence646;
+                Object oldString646 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(646);
+                if (oldString646 instanceof Utf8) {
+                    charSequence646 = (decoder).readString(((Utf8) oldString646));
+                } else {
+                    charSequence646 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(646, charSequence646);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F646': "+ unionIndex646));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema323(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex647 = (decoder.readIndex());
+        if (unionIndex647 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, null);
+        } else {
+            if (unionIndex647 == 1) {
+                Utf8 charSequence647;
+                Object oldString647 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(647);
+                if (oldString647 instanceof Utf8) {
+                    charSequence647 = (decoder).readString(((Utf8) oldString647));
+                } else {
+                    charSequence647 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(647, charSequence647);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F647': "+ unionIndex647));
+            }
+        }
+        int unionIndex648 = (decoder.readIndex());
+        if (unionIndex648 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, null);
+        } else {
+            if (unionIndex648 == 1) {
+                Utf8 charSequence648;
+                Object oldString648 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(648);
+                if (oldString648 instanceof Utf8) {
+                    charSequence648 = (decoder).readString(((Utf8) oldString648));
+                } else {
+                    charSequence648 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(648, charSequence648);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F648': "+ unionIndex648));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema324(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex649 = (decoder.readIndex());
+        if (unionIndex649 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, null);
+        } else {
+            if (unionIndex649 == 1) {
+                Utf8 charSequence649;
+                Object oldString649 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(649);
+                if (oldString649 instanceof Utf8) {
+                    charSequence649 = (decoder).readString(((Utf8) oldString649));
+                } else {
+                    charSequence649 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(649, charSequence649);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F649': "+ unionIndex649));
+            }
+        }
+        int unionIndex650 = (decoder.readIndex());
+        if (unionIndex650 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, null);
+        } else {
+            if (unionIndex650 == 1) {
+                Utf8 charSequence650;
+                Object oldString650 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(650);
+                if (oldString650 instanceof Utf8) {
+                    charSequence650 = (decoder).readString(((Utf8) oldString650));
+                } else {
+                    charSequence650 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(650, charSequence650);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F650': "+ unionIndex650));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema325(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex651 = (decoder.readIndex());
+        if (unionIndex651 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, null);
+        } else {
+            if (unionIndex651 == 1) {
+                Utf8 charSequence651;
+                Object oldString651 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(651);
+                if (oldString651 instanceof Utf8) {
+                    charSequence651 = (decoder).readString(((Utf8) oldString651));
+                } else {
+                    charSequence651 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(651, charSequence651);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F651': "+ unionIndex651));
+            }
+        }
+        int unionIndex652 = (decoder.readIndex());
+        if (unionIndex652 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, null);
+        } else {
+            if (unionIndex652 == 1) {
+                Utf8 charSequence652;
+                Object oldString652 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(652);
+                if (oldString652 instanceof Utf8) {
+                    charSequence652 = (decoder).readString(((Utf8) oldString652));
+                } else {
+                    charSequence652 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(652, charSequence652);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F652': "+ unionIndex652));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema326(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex653 = (decoder.readIndex());
+        if (unionIndex653 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, null);
+        } else {
+            if (unionIndex653 == 1) {
+                Utf8 charSequence653;
+                Object oldString653 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(653);
+                if (oldString653 instanceof Utf8) {
+                    charSequence653 = (decoder).readString(((Utf8) oldString653));
+                } else {
+                    charSequence653 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(653, charSequence653);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F653': "+ unionIndex653));
+            }
+        }
+        int unionIndex654 = (decoder.readIndex());
+        if (unionIndex654 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, null);
+        } else {
+            if (unionIndex654 == 1) {
+                Utf8 charSequence654;
+                Object oldString654 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(654);
+                if (oldString654 instanceof Utf8) {
+                    charSequence654 = (decoder).readString(((Utf8) oldString654));
+                } else {
+                    charSequence654 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(654, charSequence654);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F654': "+ unionIndex654));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema327(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex655 = (decoder.readIndex());
+        if (unionIndex655 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, null);
+        } else {
+            if (unionIndex655 == 1) {
+                Utf8 charSequence655;
+                Object oldString655 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(655);
+                if (oldString655 instanceof Utf8) {
+                    charSequence655 = (decoder).readString(((Utf8) oldString655));
+                } else {
+                    charSequence655 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(655, charSequence655);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F655': "+ unionIndex655));
+            }
+        }
+        int unionIndex656 = (decoder.readIndex());
+        if (unionIndex656 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, null);
+        } else {
+            if (unionIndex656 == 1) {
+                Utf8 charSequence656;
+                Object oldString656 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(656);
+                if (oldString656 instanceof Utf8) {
+                    charSequence656 = (decoder).readString(((Utf8) oldString656));
+                } else {
+                    charSequence656 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(656, charSequence656);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F656': "+ unionIndex656));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema328(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex657 = (decoder.readIndex());
+        if (unionIndex657 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, null);
+        } else {
+            if (unionIndex657 == 1) {
+                Utf8 charSequence657;
+                Object oldString657 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(657);
+                if (oldString657 instanceof Utf8) {
+                    charSequence657 = (decoder).readString(((Utf8) oldString657));
+                } else {
+                    charSequence657 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(657, charSequence657);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F657': "+ unionIndex657));
+            }
+        }
+        int unionIndex658 = (decoder.readIndex());
+        if (unionIndex658 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, null);
+        } else {
+            if (unionIndex658 == 1) {
+                Utf8 charSequence658;
+                Object oldString658 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(658);
+                if (oldString658 instanceof Utf8) {
+                    charSequence658 = (decoder).readString(((Utf8) oldString658));
+                } else {
+                    charSequence658 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(658, charSequence658);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F658': "+ unionIndex658));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema329(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex659 = (decoder.readIndex());
+        if (unionIndex659 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, null);
+        } else {
+            if (unionIndex659 == 1) {
+                Utf8 charSequence659;
+                Object oldString659 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(659);
+                if (oldString659 instanceof Utf8) {
+                    charSequence659 = (decoder).readString(((Utf8) oldString659));
+                } else {
+                    charSequence659 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(659, charSequence659);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F659': "+ unionIndex659));
+            }
+        }
+        int unionIndex660 = (decoder.readIndex());
+        if (unionIndex660 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, null);
+        } else {
+            if (unionIndex660 == 1) {
+                Utf8 charSequence660;
+                Object oldString660 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(660);
+                if (oldString660 instanceof Utf8) {
+                    charSequence660 = (decoder).readString(((Utf8) oldString660));
+                } else {
+                    charSequence660 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(660, charSequence660);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F660': "+ unionIndex660));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema330(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex661 = (decoder.readIndex());
+        if (unionIndex661 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, null);
+        } else {
+            if (unionIndex661 == 1) {
+                Utf8 charSequence661;
+                Object oldString661 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(661);
+                if (oldString661 instanceof Utf8) {
+                    charSequence661 = (decoder).readString(((Utf8) oldString661));
+                } else {
+                    charSequence661 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(661, charSequence661);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F661': "+ unionIndex661));
+            }
+        }
+        int unionIndex662 = (decoder.readIndex());
+        if (unionIndex662 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, null);
+        } else {
+            if (unionIndex662 == 1) {
+                Utf8 charSequence662;
+                Object oldString662 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(662);
+                if (oldString662 instanceof Utf8) {
+                    charSequence662 = (decoder).readString(((Utf8) oldString662));
+                } else {
+                    charSequence662 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(662, charSequence662);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F662': "+ unionIndex662));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema331(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex663 = (decoder.readIndex());
+        if (unionIndex663 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, null);
+        } else {
+            if (unionIndex663 == 1) {
+                Utf8 charSequence663;
+                Object oldString663 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(663);
+                if (oldString663 instanceof Utf8) {
+                    charSequence663 = (decoder).readString(((Utf8) oldString663));
+                } else {
+                    charSequence663 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(663, charSequence663);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F663': "+ unionIndex663));
+            }
+        }
+        int unionIndex664 = (decoder.readIndex());
+        if (unionIndex664 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, null);
+        } else {
+            if (unionIndex664 == 1) {
+                Utf8 charSequence664;
+                Object oldString664 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(664);
+                if (oldString664 instanceof Utf8) {
+                    charSequence664 = (decoder).readString(((Utf8) oldString664));
+                } else {
+                    charSequence664 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(664, charSequence664);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F664': "+ unionIndex664));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema332(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex665 = (decoder.readIndex());
+        if (unionIndex665 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, null);
+        } else {
+            if (unionIndex665 == 1) {
+                Utf8 charSequence665;
+                Object oldString665 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(665);
+                if (oldString665 instanceof Utf8) {
+                    charSequence665 = (decoder).readString(((Utf8) oldString665));
+                } else {
+                    charSequence665 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(665, charSequence665);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F665': "+ unionIndex665));
+            }
+        }
+        int unionIndex666 = (decoder.readIndex());
+        if (unionIndex666 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, null);
+        } else {
+            if (unionIndex666 == 1) {
+                Utf8 charSequence666;
+                Object oldString666 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(666);
+                if (oldString666 instanceof Utf8) {
+                    charSequence666 = (decoder).readString(((Utf8) oldString666));
+                } else {
+                    charSequence666 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(666, charSequence666);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F666': "+ unionIndex666));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema333(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex667 = (decoder.readIndex());
+        if (unionIndex667 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, null);
+        } else {
+            if (unionIndex667 == 1) {
+                Utf8 charSequence667;
+                Object oldString667 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(667);
+                if (oldString667 instanceof Utf8) {
+                    charSequence667 = (decoder).readString(((Utf8) oldString667));
+                } else {
+                    charSequence667 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(667, charSequence667);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F667': "+ unionIndex667));
+            }
+        }
+        int unionIndex668 = (decoder.readIndex());
+        if (unionIndex668 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, null);
+        } else {
+            if (unionIndex668 == 1) {
+                Utf8 charSequence668;
+                Object oldString668 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(668);
+                if (oldString668 instanceof Utf8) {
+                    charSequence668 = (decoder).readString(((Utf8) oldString668));
+                } else {
+                    charSequence668 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(668, charSequence668);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F668': "+ unionIndex668));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema334(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex669 = (decoder.readIndex());
+        if (unionIndex669 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, null);
+        } else {
+            if (unionIndex669 == 1) {
+                Utf8 charSequence669;
+                Object oldString669 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(669);
+                if (oldString669 instanceof Utf8) {
+                    charSequence669 = (decoder).readString(((Utf8) oldString669));
+                } else {
+                    charSequence669 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(669, charSequence669);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F669': "+ unionIndex669));
+            }
+        }
+        int unionIndex670 = (decoder.readIndex());
+        if (unionIndex670 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, null);
+        } else {
+            if (unionIndex670 == 1) {
+                Utf8 charSequence670;
+                Object oldString670 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(670);
+                if (oldString670 instanceof Utf8) {
+                    charSequence670 = (decoder).readString(((Utf8) oldString670));
+                } else {
+                    charSequence670 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(670, charSequence670);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F670': "+ unionIndex670));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema335(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex671 = (decoder.readIndex());
+        if (unionIndex671 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, null);
+        } else {
+            if (unionIndex671 == 1) {
+                Utf8 charSequence671;
+                Object oldString671 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(671);
+                if (oldString671 instanceof Utf8) {
+                    charSequence671 = (decoder).readString(((Utf8) oldString671));
+                } else {
+                    charSequence671 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(671, charSequence671);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F671': "+ unionIndex671));
+            }
+        }
+        int unionIndex672 = (decoder.readIndex());
+        if (unionIndex672 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, null);
+        } else {
+            if (unionIndex672 == 1) {
+                Utf8 charSequence672;
+                Object oldString672 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(672);
+                if (oldString672 instanceof Utf8) {
+                    charSequence672 = (decoder).readString(((Utf8) oldString672));
+                } else {
+                    charSequence672 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(672, charSequence672);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F672': "+ unionIndex672));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema336(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex673 = (decoder.readIndex());
+        if (unionIndex673 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, null);
+        } else {
+            if (unionIndex673 == 1) {
+                Utf8 charSequence673;
+                Object oldString673 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(673);
+                if (oldString673 instanceof Utf8) {
+                    charSequence673 = (decoder).readString(((Utf8) oldString673));
+                } else {
+                    charSequence673 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(673, charSequence673);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F673': "+ unionIndex673));
+            }
+        }
+        int unionIndex674 = (decoder.readIndex());
+        if (unionIndex674 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, null);
+        } else {
+            if (unionIndex674 == 1) {
+                Utf8 charSequence674;
+                Object oldString674 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(674);
+                if (oldString674 instanceof Utf8) {
+                    charSequence674 = (decoder).readString(((Utf8) oldString674));
+                } else {
+                    charSequence674 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(674, charSequence674);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F674': "+ unionIndex674));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema337(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex675 = (decoder.readIndex());
+        if (unionIndex675 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, null);
+        } else {
+            if (unionIndex675 == 1) {
+                Utf8 charSequence675;
+                Object oldString675 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(675);
+                if (oldString675 instanceof Utf8) {
+                    charSequence675 = (decoder).readString(((Utf8) oldString675));
+                } else {
+                    charSequence675 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(675, charSequence675);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F675': "+ unionIndex675));
+            }
+        }
+        int unionIndex676 = (decoder.readIndex());
+        if (unionIndex676 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, null);
+        } else {
+            if (unionIndex676 == 1) {
+                Utf8 charSequence676;
+                Object oldString676 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(676);
+                if (oldString676 instanceof Utf8) {
+                    charSequence676 = (decoder).readString(((Utf8) oldString676));
+                } else {
+                    charSequence676 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(676, charSequence676);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F676': "+ unionIndex676));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema338(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex677 = (decoder.readIndex());
+        if (unionIndex677 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, null);
+        } else {
+            if (unionIndex677 == 1) {
+                Utf8 charSequence677;
+                Object oldString677 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(677);
+                if (oldString677 instanceof Utf8) {
+                    charSequence677 = (decoder).readString(((Utf8) oldString677));
+                } else {
+                    charSequence677 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(677, charSequence677);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F677': "+ unionIndex677));
+            }
+        }
+        int unionIndex678 = (decoder.readIndex());
+        if (unionIndex678 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, null);
+        } else {
+            if (unionIndex678 == 1) {
+                Utf8 charSequence678;
+                Object oldString678 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(678);
+                if (oldString678 instanceof Utf8) {
+                    charSequence678 = (decoder).readString(((Utf8) oldString678));
+                } else {
+                    charSequence678 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(678, charSequence678);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F678': "+ unionIndex678));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema339(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex679 = (decoder.readIndex());
+        if (unionIndex679 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, null);
+        } else {
+            if (unionIndex679 == 1) {
+                Utf8 charSequence679;
+                Object oldString679 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(679);
+                if (oldString679 instanceof Utf8) {
+                    charSequence679 = (decoder).readString(((Utf8) oldString679));
+                } else {
+                    charSequence679 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(679, charSequence679);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F679': "+ unionIndex679));
+            }
+        }
+        int unionIndex680 = (decoder.readIndex());
+        if (unionIndex680 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, null);
+        } else {
+            if (unionIndex680 == 1) {
+                Utf8 charSequence680;
+                Object oldString680 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(680);
+                if (oldString680 instanceof Utf8) {
+                    charSequence680 = (decoder).readString(((Utf8) oldString680));
+                } else {
+                    charSequence680 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(680, charSequence680);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F680': "+ unionIndex680));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema340(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex681 = (decoder.readIndex());
+        if (unionIndex681 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, null);
+        } else {
+            if (unionIndex681 == 1) {
+                Utf8 charSequence681;
+                Object oldString681 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(681);
+                if (oldString681 instanceof Utf8) {
+                    charSequence681 = (decoder).readString(((Utf8) oldString681));
+                } else {
+                    charSequence681 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(681, charSequence681);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F681': "+ unionIndex681));
+            }
+        }
+        int unionIndex682 = (decoder.readIndex());
+        if (unionIndex682 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, null);
+        } else {
+            if (unionIndex682 == 1) {
+                Utf8 charSequence682;
+                Object oldString682 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(682);
+                if (oldString682 instanceof Utf8) {
+                    charSequence682 = (decoder).readString(((Utf8) oldString682));
+                } else {
+                    charSequence682 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(682, charSequence682);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F682': "+ unionIndex682));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema341(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex683 = (decoder.readIndex());
+        if (unionIndex683 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, null);
+        } else {
+            if (unionIndex683 == 1) {
+                Utf8 charSequence683;
+                Object oldString683 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(683);
+                if (oldString683 instanceof Utf8) {
+                    charSequence683 = (decoder).readString(((Utf8) oldString683));
+                } else {
+                    charSequence683 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(683, charSequence683);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F683': "+ unionIndex683));
+            }
+        }
+        int unionIndex684 = (decoder.readIndex());
+        if (unionIndex684 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, null);
+        } else {
+            if (unionIndex684 == 1) {
+                Utf8 charSequence684;
+                Object oldString684 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(684);
+                if (oldString684 instanceof Utf8) {
+                    charSequence684 = (decoder).readString(((Utf8) oldString684));
+                } else {
+                    charSequence684 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(684, charSequence684);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F684': "+ unionIndex684));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema342(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex685 = (decoder.readIndex());
+        if (unionIndex685 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, null);
+        } else {
+            if (unionIndex685 == 1) {
+                Utf8 charSequence685;
+                Object oldString685 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(685);
+                if (oldString685 instanceof Utf8) {
+                    charSequence685 = (decoder).readString(((Utf8) oldString685));
+                } else {
+                    charSequence685 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(685, charSequence685);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F685': "+ unionIndex685));
+            }
+        }
+        int unionIndex686 = (decoder.readIndex());
+        if (unionIndex686 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, null);
+        } else {
+            if (unionIndex686 == 1) {
+                Utf8 charSequence686;
+                Object oldString686 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(686);
+                if (oldString686 instanceof Utf8) {
+                    charSequence686 = (decoder).readString(((Utf8) oldString686));
+                } else {
+                    charSequence686 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(686, charSequence686);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F686': "+ unionIndex686));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema343(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex687 = (decoder.readIndex());
+        if (unionIndex687 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, null);
+        } else {
+            if (unionIndex687 == 1) {
+                Utf8 charSequence687;
+                Object oldString687 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(687);
+                if (oldString687 instanceof Utf8) {
+                    charSequence687 = (decoder).readString(((Utf8) oldString687));
+                } else {
+                    charSequence687 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(687, charSequence687);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F687': "+ unionIndex687));
+            }
+        }
+        int unionIndex688 = (decoder.readIndex());
+        if (unionIndex688 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, null);
+        } else {
+            if (unionIndex688 == 1) {
+                Utf8 charSequence688;
+                Object oldString688 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(688);
+                if (oldString688 instanceof Utf8) {
+                    charSequence688 = (decoder).readString(((Utf8) oldString688));
+                } else {
+                    charSequence688 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(688, charSequence688);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F688': "+ unionIndex688));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema344(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex689 = (decoder.readIndex());
+        if (unionIndex689 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, null);
+        } else {
+            if (unionIndex689 == 1) {
+                Utf8 charSequence689;
+                Object oldString689 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(689);
+                if (oldString689 instanceof Utf8) {
+                    charSequence689 = (decoder).readString(((Utf8) oldString689));
+                } else {
+                    charSequence689 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(689, charSequence689);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F689': "+ unionIndex689));
+            }
+        }
+        int unionIndex690 = (decoder.readIndex());
+        if (unionIndex690 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, null);
+        } else {
+            if (unionIndex690 == 1) {
+                Utf8 charSequence690;
+                Object oldString690 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(690);
+                if (oldString690 instanceof Utf8) {
+                    charSequence690 = (decoder).readString(((Utf8) oldString690));
+                } else {
+                    charSequence690 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(690, charSequence690);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F690': "+ unionIndex690));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema345(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex691 = (decoder.readIndex());
+        if (unionIndex691 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, null);
+        } else {
+            if (unionIndex691 == 1) {
+                Utf8 charSequence691;
+                Object oldString691 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(691);
+                if (oldString691 instanceof Utf8) {
+                    charSequence691 = (decoder).readString(((Utf8) oldString691));
+                } else {
+                    charSequence691 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(691, charSequence691);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F691': "+ unionIndex691));
+            }
+        }
+        int unionIndex692 = (decoder.readIndex());
+        if (unionIndex692 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, null);
+        } else {
+            if (unionIndex692 == 1) {
+                Utf8 charSequence692;
+                Object oldString692 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(692);
+                if (oldString692 instanceof Utf8) {
+                    charSequence692 = (decoder).readString(((Utf8) oldString692));
+                } else {
+                    charSequence692 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(692, charSequence692);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F692': "+ unionIndex692));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema346(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex693 = (decoder.readIndex());
+        if (unionIndex693 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, null);
+        } else {
+            if (unionIndex693 == 1) {
+                Utf8 charSequence693;
+                Object oldString693 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(693);
+                if (oldString693 instanceof Utf8) {
+                    charSequence693 = (decoder).readString(((Utf8) oldString693));
+                } else {
+                    charSequence693 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(693, charSequence693);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F693': "+ unionIndex693));
+            }
+        }
+        int unionIndex694 = (decoder.readIndex());
+        if (unionIndex694 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, null);
+        } else {
+            if (unionIndex694 == 1) {
+                Utf8 charSequence694;
+                Object oldString694 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(694);
+                if (oldString694 instanceof Utf8) {
+                    charSequence694 = (decoder).readString(((Utf8) oldString694));
+                } else {
+                    charSequence694 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(694, charSequence694);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F694': "+ unionIndex694));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema347(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex695 = (decoder.readIndex());
+        if (unionIndex695 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, null);
+        } else {
+            if (unionIndex695 == 1) {
+                Utf8 charSequence695;
+                Object oldString695 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(695);
+                if (oldString695 instanceof Utf8) {
+                    charSequence695 = (decoder).readString(((Utf8) oldString695));
+                } else {
+                    charSequence695 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(695, charSequence695);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F695': "+ unionIndex695));
+            }
+        }
+        int unionIndex696 = (decoder.readIndex());
+        if (unionIndex696 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, null);
+        } else {
+            if (unionIndex696 == 1) {
+                Utf8 charSequence696;
+                Object oldString696 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(696);
+                if (oldString696 instanceof Utf8) {
+                    charSequence696 = (decoder).readString(((Utf8) oldString696));
+                } else {
+                    charSequence696 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(696, charSequence696);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F696': "+ unionIndex696));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema348(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex697 = (decoder.readIndex());
+        if (unionIndex697 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, null);
+        } else {
+            if (unionIndex697 == 1) {
+                Utf8 charSequence697;
+                Object oldString697 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(697);
+                if (oldString697 instanceof Utf8) {
+                    charSequence697 = (decoder).readString(((Utf8) oldString697));
+                } else {
+                    charSequence697 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(697, charSequence697);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F697': "+ unionIndex697));
+            }
+        }
+        int unionIndex698 = (decoder.readIndex());
+        if (unionIndex698 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, null);
+        } else {
+            if (unionIndex698 == 1) {
+                Utf8 charSequence698;
+                Object oldString698 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(698);
+                if (oldString698 instanceof Utf8) {
+                    charSequence698 = (decoder).readString(((Utf8) oldString698));
+                } else {
+                    charSequence698 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(698, charSequence698);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F698': "+ unionIndex698));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema349(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex699 = (decoder.readIndex());
+        if (unionIndex699 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, null);
+        } else {
+            if (unionIndex699 == 1) {
+                Utf8 charSequence699;
+                Object oldString699 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(699);
+                if (oldString699 instanceof Utf8) {
+                    charSequence699 = (decoder).readString(((Utf8) oldString699));
+                } else {
+                    charSequence699 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(699, charSequence699);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F699': "+ unionIndex699));
+            }
+        }
+        int unionIndex700 = (decoder.readIndex());
+        if (unionIndex700 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, null);
+        } else {
+            if (unionIndex700 == 1) {
+                Utf8 charSequence700;
+                Object oldString700 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(700);
+                if (oldString700 instanceof Utf8) {
+                    charSequence700 = (decoder).readString(((Utf8) oldString700));
+                } else {
+                    charSequence700 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(700, charSequence700);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F700': "+ unionIndex700));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema350(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex701 = (decoder.readIndex());
+        if (unionIndex701 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, null);
+        } else {
+            if (unionIndex701 == 1) {
+                Utf8 charSequence701;
+                Object oldString701 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(701);
+                if (oldString701 instanceof Utf8) {
+                    charSequence701 = (decoder).readString(((Utf8) oldString701));
+                } else {
+                    charSequence701 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(701, charSequence701);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F701': "+ unionIndex701));
+            }
+        }
+        int unionIndex702 = (decoder.readIndex());
+        if (unionIndex702 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, null);
+        } else {
+            if (unionIndex702 == 1) {
+                Utf8 charSequence702;
+                Object oldString702 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(702);
+                if (oldString702 instanceof Utf8) {
+                    charSequence702 = (decoder).readString(((Utf8) oldString702));
+                } else {
+                    charSequence702 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(702, charSequence702);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F702': "+ unionIndex702));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema351(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex703 = (decoder.readIndex());
+        if (unionIndex703 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, null);
+        } else {
+            if (unionIndex703 == 1) {
+                Utf8 charSequence703;
+                Object oldString703 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(703);
+                if (oldString703 instanceof Utf8) {
+                    charSequence703 = (decoder).readString(((Utf8) oldString703));
+                } else {
+                    charSequence703 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(703, charSequence703);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F703': "+ unionIndex703));
+            }
+        }
+        int unionIndex704 = (decoder.readIndex());
+        if (unionIndex704 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, null);
+        } else {
+            if (unionIndex704 == 1) {
+                Utf8 charSequence704;
+                Object oldString704 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(704);
+                if (oldString704 instanceof Utf8) {
+                    charSequence704 = (decoder).readString(((Utf8) oldString704));
+                } else {
+                    charSequence704 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(704, charSequence704);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F704': "+ unionIndex704));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema352(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex705 = (decoder.readIndex());
+        if (unionIndex705 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, null);
+        } else {
+            if (unionIndex705 == 1) {
+                Utf8 charSequence705;
+                Object oldString705 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(705);
+                if (oldString705 instanceof Utf8) {
+                    charSequence705 = (decoder).readString(((Utf8) oldString705));
+                } else {
+                    charSequence705 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(705, charSequence705);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F705': "+ unionIndex705));
+            }
+        }
+        int unionIndex706 = (decoder.readIndex());
+        if (unionIndex706 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, null);
+        } else {
+            if (unionIndex706 == 1) {
+                Utf8 charSequence706;
+                Object oldString706 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(706);
+                if (oldString706 instanceof Utf8) {
+                    charSequence706 = (decoder).readString(((Utf8) oldString706));
+                } else {
+                    charSequence706 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(706, charSequence706);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F706': "+ unionIndex706));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema353(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex707 = (decoder.readIndex());
+        if (unionIndex707 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, null);
+        } else {
+            if (unionIndex707 == 1) {
+                Utf8 charSequence707;
+                Object oldString707 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(707);
+                if (oldString707 instanceof Utf8) {
+                    charSequence707 = (decoder).readString(((Utf8) oldString707));
+                } else {
+                    charSequence707 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(707, charSequence707);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F707': "+ unionIndex707));
+            }
+        }
+        int unionIndex708 = (decoder.readIndex());
+        if (unionIndex708 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, null);
+        } else {
+            if (unionIndex708 == 1) {
+                Utf8 charSequence708;
+                Object oldString708 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(708);
+                if (oldString708 instanceof Utf8) {
+                    charSequence708 = (decoder).readString(((Utf8) oldString708));
+                } else {
+                    charSequence708 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(708, charSequence708);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F708': "+ unionIndex708));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema354(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex709 = (decoder.readIndex());
+        if (unionIndex709 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, null);
+        } else {
+            if (unionIndex709 == 1) {
+                Utf8 charSequence709;
+                Object oldString709 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(709);
+                if (oldString709 instanceof Utf8) {
+                    charSequence709 = (decoder).readString(((Utf8) oldString709));
+                } else {
+                    charSequence709 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(709, charSequence709);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F709': "+ unionIndex709));
+            }
+        }
+        int unionIndex710 = (decoder.readIndex());
+        if (unionIndex710 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, null);
+        } else {
+            if (unionIndex710 == 1) {
+                Utf8 charSequence710;
+                Object oldString710 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(710);
+                if (oldString710 instanceof Utf8) {
+                    charSequence710 = (decoder).readString(((Utf8) oldString710));
+                } else {
+                    charSequence710 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(710, charSequence710);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F710': "+ unionIndex710));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema355(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex711 = (decoder.readIndex());
+        if (unionIndex711 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, null);
+        } else {
+            if (unionIndex711 == 1) {
+                Utf8 charSequence711;
+                Object oldString711 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(711);
+                if (oldString711 instanceof Utf8) {
+                    charSequence711 = (decoder).readString(((Utf8) oldString711));
+                } else {
+                    charSequence711 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(711, charSequence711);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F711': "+ unionIndex711));
+            }
+        }
+        int unionIndex712 = (decoder.readIndex());
+        if (unionIndex712 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, null);
+        } else {
+            if (unionIndex712 == 1) {
+                Utf8 charSequence712;
+                Object oldString712 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(712);
+                if (oldString712 instanceof Utf8) {
+                    charSequence712 = (decoder).readString(((Utf8) oldString712));
+                } else {
+                    charSequence712 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(712, charSequence712);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F712': "+ unionIndex712));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema356(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex713 = (decoder.readIndex());
+        if (unionIndex713 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, null);
+        } else {
+            if (unionIndex713 == 1) {
+                Utf8 charSequence713;
+                Object oldString713 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(713);
+                if (oldString713 instanceof Utf8) {
+                    charSequence713 = (decoder).readString(((Utf8) oldString713));
+                } else {
+                    charSequence713 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(713, charSequence713);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F713': "+ unionIndex713));
+            }
+        }
+        int unionIndex714 = (decoder.readIndex());
+        if (unionIndex714 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, null);
+        } else {
+            if (unionIndex714 == 1) {
+                Utf8 charSequence714;
+                Object oldString714 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(714);
+                if (oldString714 instanceof Utf8) {
+                    charSequence714 = (decoder).readString(((Utf8) oldString714));
+                } else {
+                    charSequence714 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(714, charSequence714);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F714': "+ unionIndex714));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema357(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex715 = (decoder.readIndex());
+        if (unionIndex715 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, null);
+        } else {
+            if (unionIndex715 == 1) {
+                Utf8 charSequence715;
+                Object oldString715 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(715);
+                if (oldString715 instanceof Utf8) {
+                    charSequence715 = (decoder).readString(((Utf8) oldString715));
+                } else {
+                    charSequence715 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(715, charSequence715);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F715': "+ unionIndex715));
+            }
+        }
+        int unionIndex716 = (decoder.readIndex());
+        if (unionIndex716 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, null);
+        } else {
+            if (unionIndex716 == 1) {
+                Utf8 charSequence716;
+                Object oldString716 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(716);
+                if (oldString716 instanceof Utf8) {
+                    charSequence716 = (decoder).readString(((Utf8) oldString716));
+                } else {
+                    charSequence716 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(716, charSequence716);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F716': "+ unionIndex716));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema358(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex717 = (decoder.readIndex());
+        if (unionIndex717 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, null);
+        } else {
+            if (unionIndex717 == 1) {
+                Utf8 charSequence717;
+                Object oldString717 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(717);
+                if (oldString717 instanceof Utf8) {
+                    charSequence717 = (decoder).readString(((Utf8) oldString717));
+                } else {
+                    charSequence717 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(717, charSequence717);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F717': "+ unionIndex717));
+            }
+        }
+        int unionIndex718 = (decoder.readIndex());
+        if (unionIndex718 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, null);
+        } else {
+            if (unionIndex718 == 1) {
+                Utf8 charSequence718;
+                Object oldString718 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(718);
+                if (oldString718 instanceof Utf8) {
+                    charSequence718 = (decoder).readString(((Utf8) oldString718));
+                } else {
+                    charSequence718 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(718, charSequence718);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F718': "+ unionIndex718));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema359(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex719 = (decoder.readIndex());
+        if (unionIndex719 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, null);
+        } else {
+            if (unionIndex719 == 1) {
+                Utf8 charSequence719;
+                Object oldString719 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(719);
+                if (oldString719 instanceof Utf8) {
+                    charSequence719 = (decoder).readString(((Utf8) oldString719));
+                } else {
+                    charSequence719 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(719, charSequence719);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F719': "+ unionIndex719));
+            }
+        }
+        int unionIndex720 = (decoder.readIndex());
+        if (unionIndex720 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, null);
+        } else {
+            if (unionIndex720 == 1) {
+                Utf8 charSequence720;
+                Object oldString720 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(720);
+                if (oldString720 instanceof Utf8) {
+                    charSequence720 = (decoder).readString(((Utf8) oldString720));
+                } else {
+                    charSequence720 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(720, charSequence720);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F720': "+ unionIndex720));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema360(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex721 = (decoder.readIndex());
+        if (unionIndex721 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, null);
+        } else {
+            if (unionIndex721 == 1) {
+                Utf8 charSequence721;
+                Object oldString721 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(721);
+                if (oldString721 instanceof Utf8) {
+                    charSequence721 = (decoder).readString(((Utf8) oldString721));
+                } else {
+                    charSequence721 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(721, charSequence721);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F721': "+ unionIndex721));
+            }
+        }
+        int unionIndex722 = (decoder.readIndex());
+        if (unionIndex722 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, null);
+        } else {
+            if (unionIndex722 == 1) {
+                Utf8 charSequence722;
+                Object oldString722 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(722);
+                if (oldString722 instanceof Utf8) {
+                    charSequence722 = (decoder).readString(((Utf8) oldString722));
+                } else {
+                    charSequence722 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(722, charSequence722);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F722': "+ unionIndex722));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema361(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex723 = (decoder.readIndex());
+        if (unionIndex723 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, null);
+        } else {
+            if (unionIndex723 == 1) {
+                Utf8 charSequence723;
+                Object oldString723 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(723);
+                if (oldString723 instanceof Utf8) {
+                    charSequence723 = (decoder).readString(((Utf8) oldString723));
+                } else {
+                    charSequence723 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(723, charSequence723);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F723': "+ unionIndex723));
+            }
+        }
+        int unionIndex724 = (decoder.readIndex());
+        if (unionIndex724 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, null);
+        } else {
+            if (unionIndex724 == 1) {
+                Utf8 charSequence724;
+                Object oldString724 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(724);
+                if (oldString724 instanceof Utf8) {
+                    charSequence724 = (decoder).readString(((Utf8) oldString724));
+                } else {
+                    charSequence724 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(724, charSequence724);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F724': "+ unionIndex724));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema362(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex725 = (decoder.readIndex());
+        if (unionIndex725 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, null);
+        } else {
+            if (unionIndex725 == 1) {
+                Utf8 charSequence725;
+                Object oldString725 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(725);
+                if (oldString725 instanceof Utf8) {
+                    charSequence725 = (decoder).readString(((Utf8) oldString725));
+                } else {
+                    charSequence725 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(725, charSequence725);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F725': "+ unionIndex725));
+            }
+        }
+        int unionIndex726 = (decoder.readIndex());
+        if (unionIndex726 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, null);
+        } else {
+            if (unionIndex726 == 1) {
+                Utf8 charSequence726;
+                Object oldString726 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(726);
+                if (oldString726 instanceof Utf8) {
+                    charSequence726 = (decoder).readString(((Utf8) oldString726));
+                } else {
+                    charSequence726 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(726, charSequence726);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F726': "+ unionIndex726));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema363(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex727 = (decoder.readIndex());
+        if (unionIndex727 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, null);
+        } else {
+            if (unionIndex727 == 1) {
+                Utf8 charSequence727;
+                Object oldString727 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(727);
+                if (oldString727 instanceof Utf8) {
+                    charSequence727 = (decoder).readString(((Utf8) oldString727));
+                } else {
+                    charSequence727 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(727, charSequence727);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F727': "+ unionIndex727));
+            }
+        }
+        int unionIndex728 = (decoder.readIndex());
+        if (unionIndex728 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, null);
+        } else {
+            if (unionIndex728 == 1) {
+                Utf8 charSequence728;
+                Object oldString728 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(728);
+                if (oldString728 instanceof Utf8) {
+                    charSequence728 = (decoder).readString(((Utf8) oldString728));
+                } else {
+                    charSequence728 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(728, charSequence728);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F728': "+ unionIndex728));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema364(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex729 = (decoder.readIndex());
+        if (unionIndex729 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, null);
+        } else {
+            if (unionIndex729 == 1) {
+                Utf8 charSequence729;
+                Object oldString729 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(729);
+                if (oldString729 instanceof Utf8) {
+                    charSequence729 = (decoder).readString(((Utf8) oldString729));
+                } else {
+                    charSequence729 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(729, charSequence729);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F729': "+ unionIndex729));
+            }
+        }
+        int unionIndex730 = (decoder.readIndex());
+        if (unionIndex730 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, null);
+        } else {
+            if (unionIndex730 == 1) {
+                Utf8 charSequence730;
+                Object oldString730 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(730);
+                if (oldString730 instanceof Utf8) {
+                    charSequence730 = (decoder).readString(((Utf8) oldString730));
+                } else {
+                    charSequence730 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(730, charSequence730);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F730': "+ unionIndex730));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema365(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex731 = (decoder.readIndex());
+        if (unionIndex731 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, null);
+        } else {
+            if (unionIndex731 == 1) {
+                Utf8 charSequence731;
+                Object oldString731 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(731);
+                if (oldString731 instanceof Utf8) {
+                    charSequence731 = (decoder).readString(((Utf8) oldString731));
+                } else {
+                    charSequence731 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(731, charSequence731);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F731': "+ unionIndex731));
+            }
+        }
+        int unionIndex732 = (decoder.readIndex());
+        if (unionIndex732 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, null);
+        } else {
+            if (unionIndex732 == 1) {
+                Utf8 charSequence732;
+                Object oldString732 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(732);
+                if (oldString732 instanceof Utf8) {
+                    charSequence732 = (decoder).readString(((Utf8) oldString732));
+                } else {
+                    charSequence732 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(732, charSequence732);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F732': "+ unionIndex732));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema366(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex733 = (decoder.readIndex());
+        if (unionIndex733 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, null);
+        } else {
+            if (unionIndex733 == 1) {
+                Utf8 charSequence733;
+                Object oldString733 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(733);
+                if (oldString733 instanceof Utf8) {
+                    charSequence733 = (decoder).readString(((Utf8) oldString733));
+                } else {
+                    charSequence733 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(733, charSequence733);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F733': "+ unionIndex733));
+            }
+        }
+        int unionIndex734 = (decoder.readIndex());
+        if (unionIndex734 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, null);
+        } else {
+            if (unionIndex734 == 1) {
+                Utf8 charSequence734;
+                Object oldString734 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(734);
+                if (oldString734 instanceof Utf8) {
+                    charSequence734 = (decoder).readString(((Utf8) oldString734));
+                } else {
+                    charSequence734 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(734, charSequence734);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F734': "+ unionIndex734));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema367(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex735 = (decoder.readIndex());
+        if (unionIndex735 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, null);
+        } else {
+            if (unionIndex735 == 1) {
+                Utf8 charSequence735;
+                Object oldString735 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(735);
+                if (oldString735 instanceof Utf8) {
+                    charSequence735 = (decoder).readString(((Utf8) oldString735));
+                } else {
+                    charSequence735 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(735, charSequence735);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F735': "+ unionIndex735));
+            }
+        }
+        int unionIndex736 = (decoder.readIndex());
+        if (unionIndex736 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, null);
+        } else {
+            if (unionIndex736 == 1) {
+                Utf8 charSequence736;
+                Object oldString736 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(736);
+                if (oldString736 instanceof Utf8) {
+                    charSequence736 = (decoder).readString(((Utf8) oldString736));
+                } else {
+                    charSequence736 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(736, charSequence736);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F736': "+ unionIndex736));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema368(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex737 = (decoder.readIndex());
+        if (unionIndex737 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, null);
+        } else {
+            if (unionIndex737 == 1) {
+                Utf8 charSequence737;
+                Object oldString737 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(737);
+                if (oldString737 instanceof Utf8) {
+                    charSequence737 = (decoder).readString(((Utf8) oldString737));
+                } else {
+                    charSequence737 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(737, charSequence737);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F737': "+ unionIndex737));
+            }
+        }
+        int unionIndex738 = (decoder.readIndex());
+        if (unionIndex738 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, null);
+        } else {
+            if (unionIndex738 == 1) {
+                Utf8 charSequence738;
+                Object oldString738 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(738);
+                if (oldString738 instanceof Utf8) {
+                    charSequence738 = (decoder).readString(((Utf8) oldString738));
+                } else {
+                    charSequence738 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(738, charSequence738);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F738': "+ unionIndex738));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema369(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex739 = (decoder.readIndex());
+        if (unionIndex739 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, null);
+        } else {
+            if (unionIndex739 == 1) {
+                Utf8 charSequence739;
+                Object oldString739 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(739);
+                if (oldString739 instanceof Utf8) {
+                    charSequence739 = (decoder).readString(((Utf8) oldString739));
+                } else {
+                    charSequence739 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(739, charSequence739);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F739': "+ unionIndex739));
+            }
+        }
+        int unionIndex740 = (decoder.readIndex());
+        if (unionIndex740 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, null);
+        } else {
+            if (unionIndex740 == 1) {
+                Utf8 charSequence740;
+                Object oldString740 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(740);
+                if (oldString740 instanceof Utf8) {
+                    charSequence740 = (decoder).readString(((Utf8) oldString740));
+                } else {
+                    charSequence740 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(740, charSequence740);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F740': "+ unionIndex740));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema370(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex741 = (decoder.readIndex());
+        if (unionIndex741 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, null);
+        } else {
+            if (unionIndex741 == 1) {
+                Utf8 charSequence741;
+                Object oldString741 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(741);
+                if (oldString741 instanceof Utf8) {
+                    charSequence741 = (decoder).readString(((Utf8) oldString741));
+                } else {
+                    charSequence741 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(741, charSequence741);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F741': "+ unionIndex741));
+            }
+        }
+        int unionIndex742 = (decoder.readIndex());
+        if (unionIndex742 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, null);
+        } else {
+            if (unionIndex742 == 1) {
+                Utf8 charSequence742;
+                Object oldString742 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(742);
+                if (oldString742 instanceof Utf8) {
+                    charSequence742 = (decoder).readString(((Utf8) oldString742));
+                } else {
+                    charSequence742 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(742, charSequence742);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F742': "+ unionIndex742));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema371(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex743 = (decoder.readIndex());
+        if (unionIndex743 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, null);
+        } else {
+            if (unionIndex743 == 1) {
+                Utf8 charSequence743;
+                Object oldString743 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(743);
+                if (oldString743 instanceof Utf8) {
+                    charSequence743 = (decoder).readString(((Utf8) oldString743));
+                } else {
+                    charSequence743 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(743, charSequence743);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F743': "+ unionIndex743));
+            }
+        }
+        int unionIndex744 = (decoder.readIndex());
+        if (unionIndex744 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, null);
+        } else {
+            if (unionIndex744 == 1) {
+                Utf8 charSequence744;
+                Object oldString744 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(744);
+                if (oldString744 instanceof Utf8) {
+                    charSequence744 = (decoder).readString(((Utf8) oldString744));
+                } else {
+                    charSequence744 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(744, charSequence744);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F744': "+ unionIndex744));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema372(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex745 = (decoder.readIndex());
+        if (unionIndex745 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, null);
+        } else {
+            if (unionIndex745 == 1) {
+                Utf8 charSequence745;
+                Object oldString745 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(745);
+                if (oldString745 instanceof Utf8) {
+                    charSequence745 = (decoder).readString(((Utf8) oldString745));
+                } else {
+                    charSequence745 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(745, charSequence745);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F745': "+ unionIndex745));
+            }
+        }
+        int unionIndex746 = (decoder.readIndex());
+        if (unionIndex746 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, null);
+        } else {
+            if (unionIndex746 == 1) {
+                Utf8 charSequence746;
+                Object oldString746 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(746);
+                if (oldString746 instanceof Utf8) {
+                    charSequence746 = (decoder).readString(((Utf8) oldString746));
+                } else {
+                    charSequence746 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(746, charSequence746);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F746': "+ unionIndex746));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema373(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex747 = (decoder.readIndex());
+        if (unionIndex747 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, null);
+        } else {
+            if (unionIndex747 == 1) {
+                Utf8 charSequence747;
+                Object oldString747 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(747);
+                if (oldString747 instanceof Utf8) {
+                    charSequence747 = (decoder).readString(((Utf8) oldString747));
+                } else {
+                    charSequence747 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(747, charSequence747);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F747': "+ unionIndex747));
+            }
+        }
+        int unionIndex748 = (decoder.readIndex());
+        if (unionIndex748 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, null);
+        } else {
+            if (unionIndex748 == 1) {
+                Utf8 charSequence748;
+                Object oldString748 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(748);
+                if (oldString748 instanceof Utf8) {
+                    charSequence748 = (decoder).readString(((Utf8) oldString748));
+                } else {
+                    charSequence748 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(748, charSequence748);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F748': "+ unionIndex748));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema374(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex749 = (decoder.readIndex());
+        if (unionIndex749 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, null);
+        } else {
+            if (unionIndex749 == 1) {
+                Utf8 charSequence749;
+                Object oldString749 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(749);
+                if (oldString749 instanceof Utf8) {
+                    charSequence749 = (decoder).readString(((Utf8) oldString749));
+                } else {
+                    charSequence749 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(749, charSequence749);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F749': "+ unionIndex749));
+            }
+        }
+        int unionIndex750 = (decoder.readIndex());
+        if (unionIndex750 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, null);
+        } else {
+            if (unionIndex750 == 1) {
+                Utf8 charSequence750;
+                Object oldString750 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(750);
+                if (oldString750 instanceof Utf8) {
+                    charSequence750 = (decoder).readString(((Utf8) oldString750));
+                } else {
+                    charSequence750 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(750, charSequence750);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F750': "+ unionIndex750));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema375(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex751 = (decoder.readIndex());
+        if (unionIndex751 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, null);
+        } else {
+            if (unionIndex751 == 1) {
+                Utf8 charSequence751;
+                Object oldString751 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(751);
+                if (oldString751 instanceof Utf8) {
+                    charSequence751 = (decoder).readString(((Utf8) oldString751));
+                } else {
+                    charSequence751 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(751, charSequence751);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F751': "+ unionIndex751));
+            }
+        }
+        int unionIndex752 = (decoder.readIndex());
+        if (unionIndex752 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, null);
+        } else {
+            if (unionIndex752 == 1) {
+                Utf8 charSequence752;
+                Object oldString752 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(752);
+                if (oldString752 instanceof Utf8) {
+                    charSequence752 = (decoder).readString(((Utf8) oldString752));
+                } else {
+                    charSequence752 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(752, charSequence752);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F752': "+ unionIndex752));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema376(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex753 = (decoder.readIndex());
+        if (unionIndex753 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, null);
+        } else {
+            if (unionIndex753 == 1) {
+                Utf8 charSequence753;
+                Object oldString753 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(753);
+                if (oldString753 instanceof Utf8) {
+                    charSequence753 = (decoder).readString(((Utf8) oldString753));
+                } else {
+                    charSequence753 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(753, charSequence753);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F753': "+ unionIndex753));
+            }
+        }
+        int unionIndex754 = (decoder.readIndex());
+        if (unionIndex754 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, null);
+        } else {
+            if (unionIndex754 == 1) {
+                Utf8 charSequence754;
+                Object oldString754 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(754);
+                if (oldString754 instanceof Utf8) {
+                    charSequence754 = (decoder).readString(((Utf8) oldString754));
+                } else {
+                    charSequence754 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(754, charSequence754);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F754': "+ unionIndex754));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema377(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex755 = (decoder.readIndex());
+        if (unionIndex755 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, null);
+        } else {
+            if (unionIndex755 == 1) {
+                Utf8 charSequence755;
+                Object oldString755 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(755);
+                if (oldString755 instanceof Utf8) {
+                    charSequence755 = (decoder).readString(((Utf8) oldString755));
+                } else {
+                    charSequence755 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(755, charSequence755);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F755': "+ unionIndex755));
+            }
+        }
+        int unionIndex756 = (decoder.readIndex());
+        if (unionIndex756 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, null);
+        } else {
+            if (unionIndex756 == 1) {
+                Utf8 charSequence756;
+                Object oldString756 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(756);
+                if (oldString756 instanceof Utf8) {
+                    charSequence756 = (decoder).readString(((Utf8) oldString756));
+                } else {
+                    charSequence756 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(756, charSequence756);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F756': "+ unionIndex756));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema378(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex757 = (decoder.readIndex());
+        if (unionIndex757 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, null);
+        } else {
+            if (unionIndex757 == 1) {
+                Utf8 charSequence757;
+                Object oldString757 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(757);
+                if (oldString757 instanceof Utf8) {
+                    charSequence757 = (decoder).readString(((Utf8) oldString757));
+                } else {
+                    charSequence757 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(757, charSequence757);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F757': "+ unionIndex757));
+            }
+        }
+        int unionIndex758 = (decoder.readIndex());
+        if (unionIndex758 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, null);
+        } else {
+            if (unionIndex758 == 1) {
+                Utf8 charSequence758;
+                Object oldString758 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(758);
+                if (oldString758 instanceof Utf8) {
+                    charSequence758 = (decoder).readString(((Utf8) oldString758));
+                } else {
+                    charSequence758 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(758, charSequence758);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F758': "+ unionIndex758));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema379(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex759 = (decoder.readIndex());
+        if (unionIndex759 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, null);
+        } else {
+            if (unionIndex759 == 1) {
+                Utf8 charSequence759;
+                Object oldString759 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(759);
+                if (oldString759 instanceof Utf8) {
+                    charSequence759 = (decoder).readString(((Utf8) oldString759));
+                } else {
+                    charSequence759 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(759, charSequence759);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F759': "+ unionIndex759));
+            }
+        }
+        int unionIndex760 = (decoder.readIndex());
+        if (unionIndex760 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, null);
+        } else {
+            if (unionIndex760 == 1) {
+                Utf8 charSequence760;
+                Object oldString760 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(760);
+                if (oldString760 instanceof Utf8) {
+                    charSequence760 = (decoder).readString(((Utf8) oldString760));
+                } else {
+                    charSequence760 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(760, charSequence760);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F760': "+ unionIndex760));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema380(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex761 = (decoder.readIndex());
+        if (unionIndex761 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, null);
+        } else {
+            if (unionIndex761 == 1) {
+                Utf8 charSequence761;
+                Object oldString761 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(761);
+                if (oldString761 instanceof Utf8) {
+                    charSequence761 = (decoder).readString(((Utf8) oldString761));
+                } else {
+                    charSequence761 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(761, charSequence761);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F761': "+ unionIndex761));
+            }
+        }
+        int unionIndex762 = (decoder.readIndex());
+        if (unionIndex762 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, null);
+        } else {
+            if (unionIndex762 == 1) {
+                Utf8 charSequence762;
+                Object oldString762 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(762);
+                if (oldString762 instanceof Utf8) {
+                    charSequence762 = (decoder).readString(((Utf8) oldString762));
+                } else {
+                    charSequence762 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(762, charSequence762);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F762': "+ unionIndex762));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema381(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex763 = (decoder.readIndex());
+        if (unionIndex763 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, null);
+        } else {
+            if (unionIndex763 == 1) {
+                Utf8 charSequence763;
+                Object oldString763 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(763);
+                if (oldString763 instanceof Utf8) {
+                    charSequence763 = (decoder).readString(((Utf8) oldString763));
+                } else {
+                    charSequence763 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(763, charSequence763);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F763': "+ unionIndex763));
+            }
+        }
+        int unionIndex764 = (decoder.readIndex());
+        if (unionIndex764 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, null);
+        } else {
+            if (unionIndex764 == 1) {
+                Utf8 charSequence764;
+                Object oldString764 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(764);
+                if (oldString764 instanceof Utf8) {
+                    charSequence764 = (decoder).readString(((Utf8) oldString764));
+                } else {
+                    charSequence764 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(764, charSequence764);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F764': "+ unionIndex764));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema382(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex765 = (decoder.readIndex());
+        if (unionIndex765 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, null);
+        } else {
+            if (unionIndex765 == 1) {
+                Utf8 charSequence765;
+                Object oldString765 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(765);
+                if (oldString765 instanceof Utf8) {
+                    charSequence765 = (decoder).readString(((Utf8) oldString765));
+                } else {
+                    charSequence765 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(765, charSequence765);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F765': "+ unionIndex765));
+            }
+        }
+        int unionIndex766 = (decoder.readIndex());
+        if (unionIndex766 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, null);
+        } else {
+            if (unionIndex766 == 1) {
+                Utf8 charSequence766;
+                Object oldString766 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(766);
+                if (oldString766 instanceof Utf8) {
+                    charSequence766 = (decoder).readString(((Utf8) oldString766));
+                } else {
+                    charSequence766 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(766, charSequence766);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F766': "+ unionIndex766));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema383(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex767 = (decoder.readIndex());
+        if (unionIndex767 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, null);
+        } else {
+            if (unionIndex767 == 1) {
+                Utf8 charSequence767;
+                Object oldString767 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(767);
+                if (oldString767 instanceof Utf8) {
+                    charSequence767 = (decoder).readString(((Utf8) oldString767));
+                } else {
+                    charSequence767 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(767, charSequence767);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F767': "+ unionIndex767));
+            }
+        }
+        int unionIndex768 = (decoder.readIndex());
+        if (unionIndex768 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, null);
+        } else {
+            if (unionIndex768 == 1) {
+                Utf8 charSequence768;
+                Object oldString768 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(768);
+                if (oldString768 instanceof Utf8) {
+                    charSequence768 = (decoder).readString(((Utf8) oldString768));
+                } else {
+                    charSequence768 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(768, charSequence768);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F768': "+ unionIndex768));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema384(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex769 = (decoder.readIndex());
+        if (unionIndex769 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, null);
+        } else {
+            if (unionIndex769 == 1) {
+                Utf8 charSequence769;
+                Object oldString769 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(769);
+                if (oldString769 instanceof Utf8) {
+                    charSequence769 = (decoder).readString(((Utf8) oldString769));
+                } else {
+                    charSequence769 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(769, charSequence769);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F769': "+ unionIndex769));
+            }
+        }
+        int unionIndex770 = (decoder.readIndex());
+        if (unionIndex770 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, null);
+        } else {
+            if (unionIndex770 == 1) {
+                Utf8 charSequence770;
+                Object oldString770 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(770);
+                if (oldString770 instanceof Utf8) {
+                    charSequence770 = (decoder).readString(((Utf8) oldString770));
+                } else {
+                    charSequence770 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(770, charSequence770);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F770': "+ unionIndex770));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema385(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex771 = (decoder.readIndex());
+        if (unionIndex771 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, null);
+        } else {
+            if (unionIndex771 == 1) {
+                Utf8 charSequence771;
+                Object oldString771 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(771);
+                if (oldString771 instanceof Utf8) {
+                    charSequence771 = (decoder).readString(((Utf8) oldString771));
+                } else {
+                    charSequence771 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(771, charSequence771);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F771': "+ unionIndex771));
+            }
+        }
+        int unionIndex772 = (decoder.readIndex());
+        if (unionIndex772 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, null);
+        } else {
+            if (unionIndex772 == 1) {
+                Utf8 charSequence772;
+                Object oldString772 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(772);
+                if (oldString772 instanceof Utf8) {
+                    charSequence772 = (decoder).readString(((Utf8) oldString772));
+                } else {
+                    charSequence772 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(772, charSequence772);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F772': "+ unionIndex772));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema386(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex773 = (decoder.readIndex());
+        if (unionIndex773 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, null);
+        } else {
+            if (unionIndex773 == 1) {
+                Utf8 charSequence773;
+                Object oldString773 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(773);
+                if (oldString773 instanceof Utf8) {
+                    charSequence773 = (decoder).readString(((Utf8) oldString773));
+                } else {
+                    charSequence773 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(773, charSequence773);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F773': "+ unionIndex773));
+            }
+        }
+        int unionIndex774 = (decoder.readIndex());
+        if (unionIndex774 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, null);
+        } else {
+            if (unionIndex774 == 1) {
+                Utf8 charSequence774;
+                Object oldString774 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(774);
+                if (oldString774 instanceof Utf8) {
+                    charSequence774 = (decoder).readString(((Utf8) oldString774));
+                } else {
+                    charSequence774 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(774, charSequence774);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F774': "+ unionIndex774));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema387(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex775 = (decoder.readIndex());
+        if (unionIndex775 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, null);
+        } else {
+            if (unionIndex775 == 1) {
+                Utf8 charSequence775;
+                Object oldString775 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(775);
+                if (oldString775 instanceof Utf8) {
+                    charSequence775 = (decoder).readString(((Utf8) oldString775));
+                } else {
+                    charSequence775 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(775, charSequence775);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F775': "+ unionIndex775));
+            }
+        }
+        int unionIndex776 = (decoder.readIndex());
+        if (unionIndex776 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, null);
+        } else {
+            if (unionIndex776 == 1) {
+                Utf8 charSequence776;
+                Object oldString776 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(776);
+                if (oldString776 instanceof Utf8) {
+                    charSequence776 = (decoder).readString(((Utf8) oldString776));
+                } else {
+                    charSequence776 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(776, charSequence776);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F776': "+ unionIndex776));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema388(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex777 = (decoder.readIndex());
+        if (unionIndex777 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, null);
+        } else {
+            if (unionIndex777 == 1) {
+                Utf8 charSequence777;
+                Object oldString777 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(777);
+                if (oldString777 instanceof Utf8) {
+                    charSequence777 = (decoder).readString(((Utf8) oldString777));
+                } else {
+                    charSequence777 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(777, charSequence777);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F777': "+ unionIndex777));
+            }
+        }
+        int unionIndex778 = (decoder.readIndex());
+        if (unionIndex778 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, null);
+        } else {
+            if (unionIndex778 == 1) {
+                Utf8 charSequence778;
+                Object oldString778 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(778);
+                if (oldString778 instanceof Utf8) {
+                    charSequence778 = (decoder).readString(((Utf8) oldString778));
+                } else {
+                    charSequence778 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(778, charSequence778);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F778': "+ unionIndex778));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema389(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex779 = (decoder.readIndex());
+        if (unionIndex779 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, null);
+        } else {
+            if (unionIndex779 == 1) {
+                Utf8 charSequence779;
+                Object oldString779 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(779);
+                if (oldString779 instanceof Utf8) {
+                    charSequence779 = (decoder).readString(((Utf8) oldString779));
+                } else {
+                    charSequence779 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(779, charSequence779);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F779': "+ unionIndex779));
+            }
+        }
+        int unionIndex780 = (decoder.readIndex());
+        if (unionIndex780 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, null);
+        } else {
+            if (unionIndex780 == 1) {
+                Utf8 charSequence780;
+                Object oldString780 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(780);
+                if (oldString780 instanceof Utf8) {
+                    charSequence780 = (decoder).readString(((Utf8) oldString780));
+                } else {
+                    charSequence780 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(780, charSequence780);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F780': "+ unionIndex780));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema390(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex781 = (decoder.readIndex());
+        if (unionIndex781 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, null);
+        } else {
+            if (unionIndex781 == 1) {
+                Utf8 charSequence781;
+                Object oldString781 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(781);
+                if (oldString781 instanceof Utf8) {
+                    charSequence781 = (decoder).readString(((Utf8) oldString781));
+                } else {
+                    charSequence781 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(781, charSequence781);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F781': "+ unionIndex781));
+            }
+        }
+        int unionIndex782 = (decoder.readIndex());
+        if (unionIndex782 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, null);
+        } else {
+            if (unionIndex782 == 1) {
+                Utf8 charSequence782;
+                Object oldString782 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(782);
+                if (oldString782 instanceof Utf8) {
+                    charSequence782 = (decoder).readString(((Utf8) oldString782));
+                } else {
+                    charSequence782 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(782, charSequence782);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F782': "+ unionIndex782));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema391(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex783 = (decoder.readIndex());
+        if (unionIndex783 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, null);
+        } else {
+            if (unionIndex783 == 1) {
+                Utf8 charSequence783;
+                Object oldString783 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(783);
+                if (oldString783 instanceof Utf8) {
+                    charSequence783 = (decoder).readString(((Utf8) oldString783));
+                } else {
+                    charSequence783 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(783, charSequence783);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F783': "+ unionIndex783));
+            }
+        }
+        int unionIndex784 = (decoder.readIndex());
+        if (unionIndex784 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, null);
+        } else {
+            if (unionIndex784 == 1) {
+                Utf8 charSequence784;
+                Object oldString784 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(784);
+                if (oldString784 instanceof Utf8) {
+                    charSequence784 = (decoder).readString(((Utf8) oldString784));
+                } else {
+                    charSequence784 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(784, charSequence784);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F784': "+ unionIndex784));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema392(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex785 = (decoder.readIndex());
+        if (unionIndex785 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, null);
+        } else {
+            if (unionIndex785 == 1) {
+                Utf8 charSequence785;
+                Object oldString785 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(785);
+                if (oldString785 instanceof Utf8) {
+                    charSequence785 = (decoder).readString(((Utf8) oldString785));
+                } else {
+                    charSequence785 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(785, charSequence785);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F785': "+ unionIndex785));
+            }
+        }
+        int unionIndex786 = (decoder.readIndex());
+        if (unionIndex786 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, null);
+        } else {
+            if (unionIndex786 == 1) {
+                Utf8 charSequence786;
+                Object oldString786 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(786);
+                if (oldString786 instanceof Utf8) {
+                    charSequence786 = (decoder).readString(((Utf8) oldString786));
+                } else {
+                    charSequence786 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(786, charSequence786);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F786': "+ unionIndex786));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema393(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex787 = (decoder.readIndex());
+        if (unionIndex787 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, null);
+        } else {
+            if (unionIndex787 == 1) {
+                Utf8 charSequence787;
+                Object oldString787 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(787);
+                if (oldString787 instanceof Utf8) {
+                    charSequence787 = (decoder).readString(((Utf8) oldString787));
+                } else {
+                    charSequence787 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(787, charSequence787);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F787': "+ unionIndex787));
+            }
+        }
+        int unionIndex788 = (decoder.readIndex());
+        if (unionIndex788 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, null);
+        } else {
+            if (unionIndex788 == 1) {
+                Utf8 charSequence788;
+                Object oldString788 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(788);
+                if (oldString788 instanceof Utf8) {
+                    charSequence788 = (decoder).readString(((Utf8) oldString788));
+                } else {
+                    charSequence788 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(788, charSequence788);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F788': "+ unionIndex788));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema394(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex789 = (decoder.readIndex());
+        if (unionIndex789 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, null);
+        } else {
+            if (unionIndex789 == 1) {
+                Utf8 charSequence789;
+                Object oldString789 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(789);
+                if (oldString789 instanceof Utf8) {
+                    charSequence789 = (decoder).readString(((Utf8) oldString789));
+                } else {
+                    charSequence789 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(789, charSequence789);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F789': "+ unionIndex789));
+            }
+        }
+        int unionIndex790 = (decoder.readIndex());
+        if (unionIndex790 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, null);
+        } else {
+            if (unionIndex790 == 1) {
+                Utf8 charSequence790;
+                Object oldString790 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(790);
+                if (oldString790 instanceof Utf8) {
+                    charSequence790 = (decoder).readString(((Utf8) oldString790));
+                } else {
+                    charSequence790 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(790, charSequence790);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F790': "+ unionIndex790));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema395(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex791 = (decoder.readIndex());
+        if (unionIndex791 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, null);
+        } else {
+            if (unionIndex791 == 1) {
+                Utf8 charSequence791;
+                Object oldString791 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(791);
+                if (oldString791 instanceof Utf8) {
+                    charSequence791 = (decoder).readString(((Utf8) oldString791));
+                } else {
+                    charSequence791 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(791, charSequence791);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F791': "+ unionIndex791));
+            }
+        }
+        int unionIndex792 = (decoder.readIndex());
+        if (unionIndex792 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, null);
+        } else {
+            if (unionIndex792 == 1) {
+                Utf8 charSequence792;
+                Object oldString792 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(792);
+                if (oldString792 instanceof Utf8) {
+                    charSequence792 = (decoder).readString(((Utf8) oldString792));
+                } else {
+                    charSequence792 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(792, charSequence792);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F792': "+ unionIndex792));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema396(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex793 = (decoder.readIndex());
+        if (unionIndex793 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, null);
+        } else {
+            if (unionIndex793 == 1) {
+                Utf8 charSequence793;
+                Object oldString793 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(793);
+                if (oldString793 instanceof Utf8) {
+                    charSequence793 = (decoder).readString(((Utf8) oldString793));
+                } else {
+                    charSequence793 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(793, charSequence793);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F793': "+ unionIndex793));
+            }
+        }
+        int unionIndex794 = (decoder.readIndex());
+        if (unionIndex794 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, null);
+        } else {
+            if (unionIndex794 == 1) {
+                Utf8 charSequence794;
+                Object oldString794 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(794);
+                if (oldString794 instanceof Utf8) {
+                    charSequence794 = (decoder).readString(((Utf8) oldString794));
+                } else {
+                    charSequence794 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(794, charSequence794);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F794': "+ unionIndex794));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema397(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex795 = (decoder.readIndex());
+        if (unionIndex795 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, null);
+        } else {
+            if (unionIndex795 == 1) {
+                Utf8 charSequence795;
+                Object oldString795 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(795);
+                if (oldString795 instanceof Utf8) {
+                    charSequence795 = (decoder).readString(((Utf8) oldString795));
+                } else {
+                    charSequence795 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(795, charSequence795);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F795': "+ unionIndex795));
+            }
+        }
+        int unionIndex796 = (decoder.readIndex());
+        if (unionIndex796 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, null);
+        } else {
+            if (unionIndex796 == 1) {
+                Utf8 charSequence796;
+                Object oldString796 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(796);
+                if (oldString796 instanceof Utf8) {
+                    charSequence796 = (decoder).readString(((Utf8) oldString796));
+                } else {
+                    charSequence796 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(796, charSequence796);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F796': "+ unionIndex796));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema398(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex797 = (decoder.readIndex());
+        if (unionIndex797 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, null);
+        } else {
+            if (unionIndex797 == 1) {
+                Utf8 charSequence797;
+                Object oldString797 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(797);
+                if (oldString797 instanceof Utf8) {
+                    charSequence797 = (decoder).readString(((Utf8) oldString797));
+                } else {
+                    charSequence797 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(797, charSequence797);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F797': "+ unionIndex797));
+            }
+        }
+        int unionIndex798 = (decoder.readIndex());
+        if (unionIndex798 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, null);
+        } else {
+            if (unionIndex798 == 1) {
+                Utf8 charSequence798;
+                Object oldString798 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(798);
+                if (oldString798 instanceof Utf8) {
+                    charSequence798 = (decoder).readString(((Utf8) oldString798));
+                } else {
+                    charSequence798 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(798, charSequence798);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F798': "+ unionIndex798));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema399(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex799 = (decoder.readIndex());
+        if (unionIndex799 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, null);
+        } else {
+            if (unionIndex799 == 1) {
+                Utf8 charSequence799;
+                Object oldString799 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(799);
+                if (oldString799 instanceof Utf8) {
+                    charSequence799 = (decoder).readString(((Utf8) oldString799));
+                } else {
+                    charSequence799 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(799, charSequence799);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F799': "+ unionIndex799));
+            }
+        }
+        int unionIndex800 = (decoder.readIndex());
+        if (unionIndex800 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, null);
+        } else {
+            if (unionIndex800 == 1) {
+                Utf8 charSequence800;
+                Object oldString800 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(800);
+                if (oldString800 instanceof Utf8) {
+                    charSequence800 = (decoder).readString(((Utf8) oldString800));
+                } else {
+                    charSequence800 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(800, charSequence800);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F800': "+ unionIndex800));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema400(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex801 = (decoder.readIndex());
+        if (unionIndex801 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, null);
+        } else {
+            if (unionIndex801 == 1) {
+                Utf8 charSequence801;
+                Object oldString801 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(801);
+                if (oldString801 instanceof Utf8) {
+                    charSequence801 = (decoder).readString(((Utf8) oldString801));
+                } else {
+                    charSequence801 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(801, charSequence801);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F801': "+ unionIndex801));
+            }
+        }
+        int unionIndex802 = (decoder.readIndex());
+        if (unionIndex802 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, null);
+        } else {
+            if (unionIndex802 == 1) {
+                Utf8 charSequence802;
+                Object oldString802 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(802);
+                if (oldString802 instanceof Utf8) {
+                    charSequence802 = (decoder).readString(((Utf8) oldString802));
+                } else {
+                    charSequence802 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(802, charSequence802);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F802': "+ unionIndex802));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema401(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex803 = (decoder.readIndex());
+        if (unionIndex803 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, null);
+        } else {
+            if (unionIndex803 == 1) {
+                Utf8 charSequence803;
+                Object oldString803 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(803);
+                if (oldString803 instanceof Utf8) {
+                    charSequence803 = (decoder).readString(((Utf8) oldString803));
+                } else {
+                    charSequence803 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(803, charSequence803);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F803': "+ unionIndex803));
+            }
+        }
+        int unionIndex804 = (decoder.readIndex());
+        if (unionIndex804 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, null);
+        } else {
+            if (unionIndex804 == 1) {
+                Utf8 charSequence804;
+                Object oldString804 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(804);
+                if (oldString804 instanceof Utf8) {
+                    charSequence804 = (decoder).readString(((Utf8) oldString804));
+                } else {
+                    charSequence804 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(804, charSequence804);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F804': "+ unionIndex804));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema402(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex805 = (decoder.readIndex());
+        if (unionIndex805 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, null);
+        } else {
+            if (unionIndex805 == 1) {
+                Utf8 charSequence805;
+                Object oldString805 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(805);
+                if (oldString805 instanceof Utf8) {
+                    charSequence805 = (decoder).readString(((Utf8) oldString805));
+                } else {
+                    charSequence805 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(805, charSequence805);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F805': "+ unionIndex805));
+            }
+        }
+        int unionIndex806 = (decoder.readIndex());
+        if (unionIndex806 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, null);
+        } else {
+            if (unionIndex806 == 1) {
+                Utf8 charSequence806;
+                Object oldString806 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(806);
+                if (oldString806 instanceof Utf8) {
+                    charSequence806 = (decoder).readString(((Utf8) oldString806));
+                } else {
+                    charSequence806 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(806, charSequence806);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F806': "+ unionIndex806));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema403(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex807 = (decoder.readIndex());
+        if (unionIndex807 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, null);
+        } else {
+            if (unionIndex807 == 1) {
+                Utf8 charSequence807;
+                Object oldString807 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(807);
+                if (oldString807 instanceof Utf8) {
+                    charSequence807 = (decoder).readString(((Utf8) oldString807));
+                } else {
+                    charSequence807 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(807, charSequence807);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F807': "+ unionIndex807));
+            }
+        }
+        int unionIndex808 = (decoder.readIndex());
+        if (unionIndex808 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, null);
+        } else {
+            if (unionIndex808 == 1) {
+                Utf8 charSequence808;
+                Object oldString808 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(808);
+                if (oldString808 instanceof Utf8) {
+                    charSequence808 = (decoder).readString(((Utf8) oldString808));
+                } else {
+                    charSequence808 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(808, charSequence808);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F808': "+ unionIndex808));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema404(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex809 = (decoder.readIndex());
+        if (unionIndex809 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, null);
+        } else {
+            if (unionIndex809 == 1) {
+                Utf8 charSequence809;
+                Object oldString809 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(809);
+                if (oldString809 instanceof Utf8) {
+                    charSequence809 = (decoder).readString(((Utf8) oldString809));
+                } else {
+                    charSequence809 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(809, charSequence809);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F809': "+ unionIndex809));
+            }
+        }
+        int unionIndex810 = (decoder.readIndex());
+        if (unionIndex810 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, null);
+        } else {
+            if (unionIndex810 == 1) {
+                Utf8 charSequence810;
+                Object oldString810 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(810);
+                if (oldString810 instanceof Utf8) {
+                    charSequence810 = (decoder).readString(((Utf8) oldString810));
+                } else {
+                    charSequence810 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(810, charSequence810);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F810': "+ unionIndex810));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema405(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex811 = (decoder.readIndex());
+        if (unionIndex811 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, null);
+        } else {
+            if (unionIndex811 == 1) {
+                Utf8 charSequence811;
+                Object oldString811 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(811);
+                if (oldString811 instanceof Utf8) {
+                    charSequence811 = (decoder).readString(((Utf8) oldString811));
+                } else {
+                    charSequence811 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(811, charSequence811);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F811': "+ unionIndex811));
+            }
+        }
+        int unionIndex812 = (decoder.readIndex());
+        if (unionIndex812 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, null);
+        } else {
+            if (unionIndex812 == 1) {
+                Utf8 charSequence812;
+                Object oldString812 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(812);
+                if (oldString812 instanceof Utf8) {
+                    charSequence812 = (decoder).readString(((Utf8) oldString812));
+                } else {
+                    charSequence812 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(812, charSequence812);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F812': "+ unionIndex812));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema406(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex813 = (decoder.readIndex());
+        if (unionIndex813 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, null);
+        } else {
+            if (unionIndex813 == 1) {
+                Utf8 charSequence813;
+                Object oldString813 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(813);
+                if (oldString813 instanceof Utf8) {
+                    charSequence813 = (decoder).readString(((Utf8) oldString813));
+                } else {
+                    charSequence813 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(813, charSequence813);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F813': "+ unionIndex813));
+            }
+        }
+        int unionIndex814 = (decoder.readIndex());
+        if (unionIndex814 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, null);
+        } else {
+            if (unionIndex814 == 1) {
+                Utf8 charSequence814;
+                Object oldString814 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(814);
+                if (oldString814 instanceof Utf8) {
+                    charSequence814 = (decoder).readString(((Utf8) oldString814));
+                } else {
+                    charSequence814 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(814, charSequence814);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F814': "+ unionIndex814));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema407(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex815 = (decoder.readIndex());
+        if (unionIndex815 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, null);
+        } else {
+            if (unionIndex815 == 1) {
+                Utf8 charSequence815;
+                Object oldString815 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(815);
+                if (oldString815 instanceof Utf8) {
+                    charSequence815 = (decoder).readString(((Utf8) oldString815));
+                } else {
+                    charSequence815 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(815, charSequence815);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F815': "+ unionIndex815));
+            }
+        }
+        int unionIndex816 = (decoder.readIndex());
+        if (unionIndex816 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, null);
+        } else {
+            if (unionIndex816 == 1) {
+                Utf8 charSequence816;
+                Object oldString816 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(816);
+                if (oldString816 instanceof Utf8) {
+                    charSequence816 = (decoder).readString(((Utf8) oldString816));
+                } else {
+                    charSequence816 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(816, charSequence816);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F816': "+ unionIndex816));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema408(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex817 = (decoder.readIndex());
+        if (unionIndex817 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, null);
+        } else {
+            if (unionIndex817 == 1) {
+                Utf8 charSequence817;
+                Object oldString817 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(817);
+                if (oldString817 instanceof Utf8) {
+                    charSequence817 = (decoder).readString(((Utf8) oldString817));
+                } else {
+                    charSequence817 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(817, charSequence817);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F817': "+ unionIndex817));
+            }
+        }
+        int unionIndex818 = (decoder.readIndex());
+        if (unionIndex818 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, null);
+        } else {
+            if (unionIndex818 == 1) {
+                Utf8 charSequence818;
+                Object oldString818 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(818);
+                if (oldString818 instanceof Utf8) {
+                    charSequence818 = (decoder).readString(((Utf8) oldString818));
+                } else {
+                    charSequence818 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(818, charSequence818);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F818': "+ unionIndex818));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema409(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex819 = (decoder.readIndex());
+        if (unionIndex819 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, null);
+        } else {
+            if (unionIndex819 == 1) {
+                Utf8 charSequence819;
+                Object oldString819 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(819);
+                if (oldString819 instanceof Utf8) {
+                    charSequence819 = (decoder).readString(((Utf8) oldString819));
+                } else {
+                    charSequence819 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(819, charSequence819);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F819': "+ unionIndex819));
+            }
+        }
+        int unionIndex820 = (decoder.readIndex());
+        if (unionIndex820 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, null);
+        } else {
+            if (unionIndex820 == 1) {
+                Utf8 charSequence820;
+                Object oldString820 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(820);
+                if (oldString820 instanceof Utf8) {
+                    charSequence820 = (decoder).readString(((Utf8) oldString820));
+                } else {
+                    charSequence820 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(820, charSequence820);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F820': "+ unionIndex820));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema410(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex821 = (decoder.readIndex());
+        if (unionIndex821 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, null);
+        } else {
+            if (unionIndex821 == 1) {
+                Utf8 charSequence821;
+                Object oldString821 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(821);
+                if (oldString821 instanceof Utf8) {
+                    charSequence821 = (decoder).readString(((Utf8) oldString821));
+                } else {
+                    charSequence821 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(821, charSequence821);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F821': "+ unionIndex821));
+            }
+        }
+        int unionIndex822 = (decoder.readIndex());
+        if (unionIndex822 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, null);
+        } else {
+            if (unionIndex822 == 1) {
+                Utf8 charSequence822;
+                Object oldString822 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(822);
+                if (oldString822 instanceof Utf8) {
+                    charSequence822 = (decoder).readString(((Utf8) oldString822));
+                } else {
+                    charSequence822 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(822, charSequence822);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F822': "+ unionIndex822));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema411(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex823 = (decoder.readIndex());
+        if (unionIndex823 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, null);
+        } else {
+            if (unionIndex823 == 1) {
+                Utf8 charSequence823;
+                Object oldString823 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(823);
+                if (oldString823 instanceof Utf8) {
+                    charSequence823 = (decoder).readString(((Utf8) oldString823));
+                } else {
+                    charSequence823 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(823, charSequence823);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F823': "+ unionIndex823));
+            }
+        }
+        int unionIndex824 = (decoder.readIndex());
+        if (unionIndex824 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, null);
+        } else {
+            if (unionIndex824 == 1) {
+                Utf8 charSequence824;
+                Object oldString824 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(824);
+                if (oldString824 instanceof Utf8) {
+                    charSequence824 = (decoder).readString(((Utf8) oldString824));
+                } else {
+                    charSequence824 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(824, charSequence824);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F824': "+ unionIndex824));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema412(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex825 = (decoder.readIndex());
+        if (unionIndex825 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, null);
+        } else {
+            if (unionIndex825 == 1) {
+                Utf8 charSequence825;
+                Object oldString825 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(825);
+                if (oldString825 instanceof Utf8) {
+                    charSequence825 = (decoder).readString(((Utf8) oldString825));
+                } else {
+                    charSequence825 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(825, charSequence825);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F825': "+ unionIndex825));
+            }
+        }
+        int unionIndex826 = (decoder.readIndex());
+        if (unionIndex826 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, null);
+        } else {
+            if (unionIndex826 == 1) {
+                Utf8 charSequence826;
+                Object oldString826 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(826);
+                if (oldString826 instanceof Utf8) {
+                    charSequence826 = (decoder).readString(((Utf8) oldString826));
+                } else {
+                    charSequence826 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(826, charSequence826);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F826': "+ unionIndex826));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema413(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex827 = (decoder.readIndex());
+        if (unionIndex827 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, null);
+        } else {
+            if (unionIndex827 == 1) {
+                Utf8 charSequence827;
+                Object oldString827 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(827);
+                if (oldString827 instanceof Utf8) {
+                    charSequence827 = (decoder).readString(((Utf8) oldString827));
+                } else {
+                    charSequence827 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(827, charSequence827);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F827': "+ unionIndex827));
+            }
+        }
+        int unionIndex828 = (decoder.readIndex());
+        if (unionIndex828 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, null);
+        } else {
+            if (unionIndex828 == 1) {
+                Utf8 charSequence828;
+                Object oldString828 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(828);
+                if (oldString828 instanceof Utf8) {
+                    charSequence828 = (decoder).readString(((Utf8) oldString828));
+                } else {
+                    charSequence828 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(828, charSequence828);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F828': "+ unionIndex828));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema414(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex829 = (decoder.readIndex());
+        if (unionIndex829 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, null);
+        } else {
+            if (unionIndex829 == 1) {
+                Utf8 charSequence829;
+                Object oldString829 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(829);
+                if (oldString829 instanceof Utf8) {
+                    charSequence829 = (decoder).readString(((Utf8) oldString829));
+                } else {
+                    charSequence829 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(829, charSequence829);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F829': "+ unionIndex829));
+            }
+        }
+        int unionIndex830 = (decoder.readIndex());
+        if (unionIndex830 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, null);
+        } else {
+            if (unionIndex830 == 1) {
+                Utf8 charSequence830;
+                Object oldString830 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(830);
+                if (oldString830 instanceof Utf8) {
+                    charSequence830 = (decoder).readString(((Utf8) oldString830));
+                } else {
+                    charSequence830 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(830, charSequence830);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F830': "+ unionIndex830));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema415(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex831 = (decoder.readIndex());
+        if (unionIndex831 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, null);
+        } else {
+            if (unionIndex831 == 1) {
+                Utf8 charSequence831;
+                Object oldString831 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(831);
+                if (oldString831 instanceof Utf8) {
+                    charSequence831 = (decoder).readString(((Utf8) oldString831));
+                } else {
+                    charSequence831 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(831, charSequence831);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F831': "+ unionIndex831));
+            }
+        }
+        int unionIndex832 = (decoder.readIndex());
+        if (unionIndex832 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, null);
+        } else {
+            if (unionIndex832 == 1) {
+                Utf8 charSequence832;
+                Object oldString832 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(832);
+                if (oldString832 instanceof Utf8) {
+                    charSequence832 = (decoder).readString(((Utf8) oldString832));
+                } else {
+                    charSequence832 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(832, charSequence832);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F832': "+ unionIndex832));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema416(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex833 = (decoder.readIndex());
+        if (unionIndex833 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, null);
+        } else {
+            if (unionIndex833 == 1) {
+                Utf8 charSequence833;
+                Object oldString833 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(833);
+                if (oldString833 instanceof Utf8) {
+                    charSequence833 = (decoder).readString(((Utf8) oldString833));
+                } else {
+                    charSequence833 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(833, charSequence833);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F833': "+ unionIndex833));
+            }
+        }
+        int unionIndex834 = (decoder.readIndex());
+        if (unionIndex834 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, null);
+        } else {
+            if (unionIndex834 == 1) {
+                Utf8 charSequence834;
+                Object oldString834 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(834);
+                if (oldString834 instanceof Utf8) {
+                    charSequence834 = (decoder).readString(((Utf8) oldString834));
+                } else {
+                    charSequence834 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(834, charSequence834);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F834': "+ unionIndex834));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema417(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex835 = (decoder.readIndex());
+        if (unionIndex835 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, null);
+        } else {
+            if (unionIndex835 == 1) {
+                Utf8 charSequence835;
+                Object oldString835 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(835);
+                if (oldString835 instanceof Utf8) {
+                    charSequence835 = (decoder).readString(((Utf8) oldString835));
+                } else {
+                    charSequence835 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(835, charSequence835);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F835': "+ unionIndex835));
+            }
+        }
+        int unionIndex836 = (decoder.readIndex());
+        if (unionIndex836 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, null);
+        } else {
+            if (unionIndex836 == 1) {
+                Utf8 charSequence836;
+                Object oldString836 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(836);
+                if (oldString836 instanceof Utf8) {
+                    charSequence836 = (decoder).readString(((Utf8) oldString836));
+                } else {
+                    charSequence836 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(836, charSequence836);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F836': "+ unionIndex836));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema418(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex837 = (decoder.readIndex());
+        if (unionIndex837 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, null);
+        } else {
+            if (unionIndex837 == 1) {
+                Utf8 charSequence837;
+                Object oldString837 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(837);
+                if (oldString837 instanceof Utf8) {
+                    charSequence837 = (decoder).readString(((Utf8) oldString837));
+                } else {
+                    charSequence837 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(837, charSequence837);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F837': "+ unionIndex837));
+            }
+        }
+        int unionIndex838 = (decoder.readIndex());
+        if (unionIndex838 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, null);
+        } else {
+            if (unionIndex838 == 1) {
+                Utf8 charSequence838;
+                Object oldString838 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(838);
+                if (oldString838 instanceof Utf8) {
+                    charSequence838 = (decoder).readString(((Utf8) oldString838));
+                } else {
+                    charSequence838 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(838, charSequence838);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F838': "+ unionIndex838));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema419(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex839 = (decoder.readIndex());
+        if (unionIndex839 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, null);
+        } else {
+            if (unionIndex839 == 1) {
+                Utf8 charSequence839;
+                Object oldString839 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(839);
+                if (oldString839 instanceof Utf8) {
+                    charSequence839 = (decoder).readString(((Utf8) oldString839));
+                } else {
+                    charSequence839 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(839, charSequence839);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F839': "+ unionIndex839));
+            }
+        }
+        int unionIndex840 = (decoder.readIndex());
+        if (unionIndex840 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, null);
+        } else {
+            if (unionIndex840 == 1) {
+                Utf8 charSequence840;
+                Object oldString840 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(840);
+                if (oldString840 instanceof Utf8) {
+                    charSequence840 = (decoder).readString(((Utf8) oldString840));
+                } else {
+                    charSequence840 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(840, charSequence840);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F840': "+ unionIndex840));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema420(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex841 = (decoder.readIndex());
+        if (unionIndex841 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, null);
+        } else {
+            if (unionIndex841 == 1) {
+                Utf8 charSequence841;
+                Object oldString841 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(841);
+                if (oldString841 instanceof Utf8) {
+                    charSequence841 = (decoder).readString(((Utf8) oldString841));
+                } else {
+                    charSequence841 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(841, charSequence841);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F841': "+ unionIndex841));
+            }
+        }
+        int unionIndex842 = (decoder.readIndex());
+        if (unionIndex842 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, null);
+        } else {
+            if (unionIndex842 == 1) {
+                Utf8 charSequence842;
+                Object oldString842 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(842);
+                if (oldString842 instanceof Utf8) {
+                    charSequence842 = (decoder).readString(((Utf8) oldString842));
+                } else {
+                    charSequence842 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(842, charSequence842);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F842': "+ unionIndex842));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema421(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex843 = (decoder.readIndex());
+        if (unionIndex843 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, null);
+        } else {
+            if (unionIndex843 == 1) {
+                Utf8 charSequence843;
+                Object oldString843 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(843);
+                if (oldString843 instanceof Utf8) {
+                    charSequence843 = (decoder).readString(((Utf8) oldString843));
+                } else {
+                    charSequence843 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(843, charSequence843);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F843': "+ unionIndex843));
+            }
+        }
+        int unionIndex844 = (decoder.readIndex());
+        if (unionIndex844 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, null);
+        } else {
+            if (unionIndex844 == 1) {
+                Utf8 charSequence844;
+                Object oldString844 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(844);
+                if (oldString844 instanceof Utf8) {
+                    charSequence844 = (decoder).readString(((Utf8) oldString844));
+                } else {
+                    charSequence844 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(844, charSequence844);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F844': "+ unionIndex844));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema422(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex845 = (decoder.readIndex());
+        if (unionIndex845 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, null);
+        } else {
+            if (unionIndex845 == 1) {
+                Utf8 charSequence845;
+                Object oldString845 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(845);
+                if (oldString845 instanceof Utf8) {
+                    charSequence845 = (decoder).readString(((Utf8) oldString845));
+                } else {
+                    charSequence845 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(845, charSequence845);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F845': "+ unionIndex845));
+            }
+        }
+        int unionIndex846 = (decoder.readIndex());
+        if (unionIndex846 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, null);
+        } else {
+            if (unionIndex846 == 1) {
+                Utf8 charSequence846;
+                Object oldString846 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(846);
+                if (oldString846 instanceof Utf8) {
+                    charSequence846 = (decoder).readString(((Utf8) oldString846));
+                } else {
+                    charSequence846 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(846, charSequence846);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F846': "+ unionIndex846));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema423(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex847 = (decoder.readIndex());
+        if (unionIndex847 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, null);
+        } else {
+            if (unionIndex847 == 1) {
+                Utf8 charSequence847;
+                Object oldString847 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(847);
+                if (oldString847 instanceof Utf8) {
+                    charSequence847 = (decoder).readString(((Utf8) oldString847));
+                } else {
+                    charSequence847 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(847, charSequence847);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F847': "+ unionIndex847));
+            }
+        }
+        int unionIndex848 = (decoder.readIndex());
+        if (unionIndex848 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, null);
+        } else {
+            if (unionIndex848 == 1) {
+                Utf8 charSequence848;
+                Object oldString848 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(848);
+                if (oldString848 instanceof Utf8) {
+                    charSequence848 = (decoder).readString(((Utf8) oldString848));
+                } else {
+                    charSequence848 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(848, charSequence848);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F848': "+ unionIndex848));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema424(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex849 = (decoder.readIndex());
+        if (unionIndex849 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, null);
+        } else {
+            if (unionIndex849 == 1) {
+                Utf8 charSequence849;
+                Object oldString849 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(849);
+                if (oldString849 instanceof Utf8) {
+                    charSequence849 = (decoder).readString(((Utf8) oldString849));
+                } else {
+                    charSequence849 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(849, charSequence849);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F849': "+ unionIndex849));
+            }
+        }
+        int unionIndex850 = (decoder.readIndex());
+        if (unionIndex850 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, null);
+        } else {
+            if (unionIndex850 == 1) {
+                Utf8 charSequence850;
+                Object oldString850 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(850);
+                if (oldString850 instanceof Utf8) {
+                    charSequence850 = (decoder).readString(((Utf8) oldString850));
+                } else {
+                    charSequence850 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(850, charSequence850);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F850': "+ unionIndex850));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema425(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex851 = (decoder.readIndex());
+        if (unionIndex851 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, null);
+        } else {
+            if (unionIndex851 == 1) {
+                Utf8 charSequence851;
+                Object oldString851 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(851);
+                if (oldString851 instanceof Utf8) {
+                    charSequence851 = (decoder).readString(((Utf8) oldString851));
+                } else {
+                    charSequence851 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(851, charSequence851);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F851': "+ unionIndex851));
+            }
+        }
+        int unionIndex852 = (decoder.readIndex());
+        if (unionIndex852 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, null);
+        } else {
+            if (unionIndex852 == 1) {
+                Utf8 charSequence852;
+                Object oldString852 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(852);
+                if (oldString852 instanceof Utf8) {
+                    charSequence852 = (decoder).readString(((Utf8) oldString852));
+                } else {
+                    charSequence852 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(852, charSequence852);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F852': "+ unionIndex852));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema426(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex853 = (decoder.readIndex());
+        if (unionIndex853 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, null);
+        } else {
+            if (unionIndex853 == 1) {
+                Utf8 charSequence853;
+                Object oldString853 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(853);
+                if (oldString853 instanceof Utf8) {
+                    charSequence853 = (decoder).readString(((Utf8) oldString853));
+                } else {
+                    charSequence853 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(853, charSequence853);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F853': "+ unionIndex853));
+            }
+        }
+        int unionIndex854 = (decoder.readIndex());
+        if (unionIndex854 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, null);
+        } else {
+            if (unionIndex854 == 1) {
+                Utf8 charSequence854;
+                Object oldString854 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(854);
+                if (oldString854 instanceof Utf8) {
+                    charSequence854 = (decoder).readString(((Utf8) oldString854));
+                } else {
+                    charSequence854 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(854, charSequence854);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F854': "+ unionIndex854));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema427(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex855 = (decoder.readIndex());
+        if (unionIndex855 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, null);
+        } else {
+            if (unionIndex855 == 1) {
+                Utf8 charSequence855;
+                Object oldString855 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(855);
+                if (oldString855 instanceof Utf8) {
+                    charSequence855 = (decoder).readString(((Utf8) oldString855));
+                } else {
+                    charSequence855 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(855, charSequence855);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F855': "+ unionIndex855));
+            }
+        }
+        int unionIndex856 = (decoder.readIndex());
+        if (unionIndex856 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, null);
+        } else {
+            if (unionIndex856 == 1) {
+                Utf8 charSequence856;
+                Object oldString856 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(856);
+                if (oldString856 instanceof Utf8) {
+                    charSequence856 = (decoder).readString(((Utf8) oldString856));
+                } else {
+                    charSequence856 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(856, charSequence856);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F856': "+ unionIndex856));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema428(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex857 = (decoder.readIndex());
+        if (unionIndex857 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, null);
+        } else {
+            if (unionIndex857 == 1) {
+                Utf8 charSequence857;
+                Object oldString857 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(857);
+                if (oldString857 instanceof Utf8) {
+                    charSequence857 = (decoder).readString(((Utf8) oldString857));
+                } else {
+                    charSequence857 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(857, charSequence857);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F857': "+ unionIndex857));
+            }
+        }
+        int unionIndex858 = (decoder.readIndex());
+        if (unionIndex858 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, null);
+        } else {
+            if (unionIndex858 == 1) {
+                Utf8 charSequence858;
+                Object oldString858 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(858);
+                if (oldString858 instanceof Utf8) {
+                    charSequence858 = (decoder).readString(((Utf8) oldString858));
+                } else {
+                    charSequence858 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(858, charSequence858);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F858': "+ unionIndex858));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema429(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex859 = (decoder.readIndex());
+        if (unionIndex859 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, null);
+        } else {
+            if (unionIndex859 == 1) {
+                Utf8 charSequence859;
+                Object oldString859 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(859);
+                if (oldString859 instanceof Utf8) {
+                    charSequence859 = (decoder).readString(((Utf8) oldString859));
+                } else {
+                    charSequence859 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(859, charSequence859);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F859': "+ unionIndex859));
+            }
+        }
+        int unionIndex860 = (decoder.readIndex());
+        if (unionIndex860 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, null);
+        } else {
+            if (unionIndex860 == 1) {
+                Utf8 charSequence860;
+                Object oldString860 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(860);
+                if (oldString860 instanceof Utf8) {
+                    charSequence860 = (decoder).readString(((Utf8) oldString860));
+                } else {
+                    charSequence860 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(860, charSequence860);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F860': "+ unionIndex860));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema430(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex861 = (decoder.readIndex());
+        if (unionIndex861 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, null);
+        } else {
+            if (unionIndex861 == 1) {
+                Utf8 charSequence861;
+                Object oldString861 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(861);
+                if (oldString861 instanceof Utf8) {
+                    charSequence861 = (decoder).readString(((Utf8) oldString861));
+                } else {
+                    charSequence861 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(861, charSequence861);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F861': "+ unionIndex861));
+            }
+        }
+        int unionIndex862 = (decoder.readIndex());
+        if (unionIndex862 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, null);
+        } else {
+            if (unionIndex862 == 1) {
+                Utf8 charSequence862;
+                Object oldString862 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(862);
+                if (oldString862 instanceof Utf8) {
+                    charSequence862 = (decoder).readString(((Utf8) oldString862));
+                } else {
+                    charSequence862 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(862, charSequence862);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F862': "+ unionIndex862));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema431(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex863 = (decoder.readIndex());
+        if (unionIndex863 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, null);
+        } else {
+            if (unionIndex863 == 1) {
+                Utf8 charSequence863;
+                Object oldString863 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(863);
+                if (oldString863 instanceof Utf8) {
+                    charSequence863 = (decoder).readString(((Utf8) oldString863));
+                } else {
+                    charSequence863 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(863, charSequence863);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F863': "+ unionIndex863));
+            }
+        }
+        int unionIndex864 = (decoder.readIndex());
+        if (unionIndex864 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, null);
+        } else {
+            if (unionIndex864 == 1) {
+                Utf8 charSequence864;
+                Object oldString864 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(864);
+                if (oldString864 instanceof Utf8) {
+                    charSequence864 = (decoder).readString(((Utf8) oldString864));
+                } else {
+                    charSequence864 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(864, charSequence864);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F864': "+ unionIndex864));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema432(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex865 = (decoder.readIndex());
+        if (unionIndex865 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, null);
+        } else {
+            if (unionIndex865 == 1) {
+                Utf8 charSequence865;
+                Object oldString865 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(865);
+                if (oldString865 instanceof Utf8) {
+                    charSequence865 = (decoder).readString(((Utf8) oldString865));
+                } else {
+                    charSequence865 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(865, charSequence865);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F865': "+ unionIndex865));
+            }
+        }
+        int unionIndex866 = (decoder.readIndex());
+        if (unionIndex866 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, null);
+        } else {
+            if (unionIndex866 == 1) {
+                Utf8 charSequence866;
+                Object oldString866 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(866);
+                if (oldString866 instanceof Utf8) {
+                    charSequence866 = (decoder).readString(((Utf8) oldString866));
+                } else {
+                    charSequence866 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(866, charSequence866);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F866': "+ unionIndex866));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema433(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex867 = (decoder.readIndex());
+        if (unionIndex867 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, null);
+        } else {
+            if (unionIndex867 == 1) {
+                Utf8 charSequence867;
+                Object oldString867 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(867);
+                if (oldString867 instanceof Utf8) {
+                    charSequence867 = (decoder).readString(((Utf8) oldString867));
+                } else {
+                    charSequence867 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(867, charSequence867);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F867': "+ unionIndex867));
+            }
+        }
+        int unionIndex868 = (decoder.readIndex());
+        if (unionIndex868 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, null);
+        } else {
+            if (unionIndex868 == 1) {
+                Utf8 charSequence868;
+                Object oldString868 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(868);
+                if (oldString868 instanceof Utf8) {
+                    charSequence868 = (decoder).readString(((Utf8) oldString868));
+                } else {
+                    charSequence868 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(868, charSequence868);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F868': "+ unionIndex868));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema434(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex869 = (decoder.readIndex());
+        if (unionIndex869 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, null);
+        } else {
+            if (unionIndex869 == 1) {
+                Utf8 charSequence869;
+                Object oldString869 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(869);
+                if (oldString869 instanceof Utf8) {
+                    charSequence869 = (decoder).readString(((Utf8) oldString869));
+                } else {
+                    charSequence869 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(869, charSequence869);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F869': "+ unionIndex869));
+            }
+        }
+        int unionIndex870 = (decoder.readIndex());
+        if (unionIndex870 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, null);
+        } else {
+            if (unionIndex870 == 1) {
+                Utf8 charSequence870;
+                Object oldString870 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(870);
+                if (oldString870 instanceof Utf8) {
+                    charSequence870 = (decoder).readString(((Utf8) oldString870));
+                } else {
+                    charSequence870 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(870, charSequence870);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F870': "+ unionIndex870));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema435(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex871 = (decoder.readIndex());
+        if (unionIndex871 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, null);
+        } else {
+            if (unionIndex871 == 1) {
+                Utf8 charSequence871;
+                Object oldString871 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(871);
+                if (oldString871 instanceof Utf8) {
+                    charSequence871 = (decoder).readString(((Utf8) oldString871));
+                } else {
+                    charSequence871 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(871, charSequence871);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F871': "+ unionIndex871));
+            }
+        }
+        int unionIndex872 = (decoder.readIndex());
+        if (unionIndex872 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, null);
+        } else {
+            if (unionIndex872 == 1) {
+                Utf8 charSequence872;
+                Object oldString872 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(872);
+                if (oldString872 instanceof Utf8) {
+                    charSequence872 = (decoder).readString(((Utf8) oldString872));
+                } else {
+                    charSequence872 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(872, charSequence872);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F872': "+ unionIndex872));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema436(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex873 = (decoder.readIndex());
+        if (unionIndex873 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, null);
+        } else {
+            if (unionIndex873 == 1) {
+                Utf8 charSequence873;
+                Object oldString873 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(873);
+                if (oldString873 instanceof Utf8) {
+                    charSequence873 = (decoder).readString(((Utf8) oldString873));
+                } else {
+                    charSequence873 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(873, charSequence873);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F873': "+ unionIndex873));
+            }
+        }
+        int unionIndex874 = (decoder.readIndex());
+        if (unionIndex874 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, null);
+        } else {
+            if (unionIndex874 == 1) {
+                Utf8 charSequence874;
+                Object oldString874 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(874);
+                if (oldString874 instanceof Utf8) {
+                    charSequence874 = (decoder).readString(((Utf8) oldString874));
+                } else {
+                    charSequence874 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(874, charSequence874);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F874': "+ unionIndex874));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema437(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex875 = (decoder.readIndex());
+        if (unionIndex875 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, null);
+        } else {
+            if (unionIndex875 == 1) {
+                Utf8 charSequence875;
+                Object oldString875 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(875);
+                if (oldString875 instanceof Utf8) {
+                    charSequence875 = (decoder).readString(((Utf8) oldString875));
+                } else {
+                    charSequence875 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(875, charSequence875);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F875': "+ unionIndex875));
+            }
+        }
+        int unionIndex876 = (decoder.readIndex());
+        if (unionIndex876 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, null);
+        } else {
+            if (unionIndex876 == 1) {
+                Utf8 charSequence876;
+                Object oldString876 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(876);
+                if (oldString876 instanceof Utf8) {
+                    charSequence876 = (decoder).readString(((Utf8) oldString876));
+                } else {
+                    charSequence876 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(876, charSequence876);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F876': "+ unionIndex876));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema438(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex877 = (decoder.readIndex());
+        if (unionIndex877 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, null);
+        } else {
+            if (unionIndex877 == 1) {
+                Utf8 charSequence877;
+                Object oldString877 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(877);
+                if (oldString877 instanceof Utf8) {
+                    charSequence877 = (decoder).readString(((Utf8) oldString877));
+                } else {
+                    charSequence877 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(877, charSequence877);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F877': "+ unionIndex877));
+            }
+        }
+        int unionIndex878 = (decoder.readIndex());
+        if (unionIndex878 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, null);
+        } else {
+            if (unionIndex878 == 1) {
+                Utf8 charSequence878;
+                Object oldString878 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(878);
+                if (oldString878 instanceof Utf8) {
+                    charSequence878 = (decoder).readString(((Utf8) oldString878));
+                } else {
+                    charSequence878 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(878, charSequence878);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F878': "+ unionIndex878));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema439(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex879 = (decoder.readIndex());
+        if (unionIndex879 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, null);
+        } else {
+            if (unionIndex879 == 1) {
+                Utf8 charSequence879;
+                Object oldString879 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(879);
+                if (oldString879 instanceof Utf8) {
+                    charSequence879 = (decoder).readString(((Utf8) oldString879));
+                } else {
+                    charSequence879 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(879, charSequence879);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F879': "+ unionIndex879));
+            }
+        }
+        int unionIndex880 = (decoder.readIndex());
+        if (unionIndex880 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, null);
+        } else {
+            if (unionIndex880 == 1) {
+                Utf8 charSequence880;
+                Object oldString880 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(880);
+                if (oldString880 instanceof Utf8) {
+                    charSequence880 = (decoder).readString(((Utf8) oldString880));
+                } else {
+                    charSequence880 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(880, charSequence880);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F880': "+ unionIndex880));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema440(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex881 = (decoder.readIndex());
+        if (unionIndex881 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, null);
+        } else {
+            if (unionIndex881 == 1) {
+                Utf8 charSequence881;
+                Object oldString881 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(881);
+                if (oldString881 instanceof Utf8) {
+                    charSequence881 = (decoder).readString(((Utf8) oldString881));
+                } else {
+                    charSequence881 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(881, charSequence881);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F881': "+ unionIndex881));
+            }
+        }
+        int unionIndex882 = (decoder.readIndex());
+        if (unionIndex882 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, null);
+        } else {
+            if (unionIndex882 == 1) {
+                Utf8 charSequence882;
+                Object oldString882 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(882);
+                if (oldString882 instanceof Utf8) {
+                    charSequence882 = (decoder).readString(((Utf8) oldString882));
+                } else {
+                    charSequence882 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(882, charSequence882);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F882': "+ unionIndex882));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema441(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex883 = (decoder.readIndex());
+        if (unionIndex883 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, null);
+        } else {
+            if (unionIndex883 == 1) {
+                Utf8 charSequence883;
+                Object oldString883 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(883);
+                if (oldString883 instanceof Utf8) {
+                    charSequence883 = (decoder).readString(((Utf8) oldString883));
+                } else {
+                    charSequence883 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(883, charSequence883);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F883': "+ unionIndex883));
+            }
+        }
+        int unionIndex884 = (decoder.readIndex());
+        if (unionIndex884 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, null);
+        } else {
+            if (unionIndex884 == 1) {
+                Utf8 charSequence884;
+                Object oldString884 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(884);
+                if (oldString884 instanceof Utf8) {
+                    charSequence884 = (decoder).readString(((Utf8) oldString884));
+                } else {
+                    charSequence884 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(884, charSequence884);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F884': "+ unionIndex884));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema442(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex885 = (decoder.readIndex());
+        if (unionIndex885 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, null);
+        } else {
+            if (unionIndex885 == 1) {
+                Utf8 charSequence885;
+                Object oldString885 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(885);
+                if (oldString885 instanceof Utf8) {
+                    charSequence885 = (decoder).readString(((Utf8) oldString885));
+                } else {
+                    charSequence885 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(885, charSequence885);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F885': "+ unionIndex885));
+            }
+        }
+        int unionIndex886 = (decoder.readIndex());
+        if (unionIndex886 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, null);
+        } else {
+            if (unionIndex886 == 1) {
+                Utf8 charSequence886;
+                Object oldString886 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(886);
+                if (oldString886 instanceof Utf8) {
+                    charSequence886 = (decoder).readString(((Utf8) oldString886));
+                } else {
+                    charSequence886 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(886, charSequence886);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F886': "+ unionIndex886));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema443(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex887 = (decoder.readIndex());
+        if (unionIndex887 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, null);
+        } else {
+            if (unionIndex887 == 1) {
+                Utf8 charSequence887;
+                Object oldString887 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(887);
+                if (oldString887 instanceof Utf8) {
+                    charSequence887 = (decoder).readString(((Utf8) oldString887));
+                } else {
+                    charSequence887 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(887, charSequence887);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F887': "+ unionIndex887));
+            }
+        }
+        int unionIndex888 = (decoder.readIndex());
+        if (unionIndex888 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, null);
+        } else {
+            if (unionIndex888 == 1) {
+                Utf8 charSequence888;
+                Object oldString888 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(888);
+                if (oldString888 instanceof Utf8) {
+                    charSequence888 = (decoder).readString(((Utf8) oldString888));
+                } else {
+                    charSequence888 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(888, charSequence888);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F888': "+ unionIndex888));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema444(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex889 = (decoder.readIndex());
+        if (unionIndex889 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, null);
+        } else {
+            if (unionIndex889 == 1) {
+                Utf8 charSequence889;
+                Object oldString889 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(889);
+                if (oldString889 instanceof Utf8) {
+                    charSequence889 = (decoder).readString(((Utf8) oldString889));
+                } else {
+                    charSequence889 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(889, charSequence889);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F889': "+ unionIndex889));
+            }
+        }
+        int unionIndex890 = (decoder.readIndex());
+        if (unionIndex890 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, null);
+        } else {
+            if (unionIndex890 == 1) {
+                Utf8 charSequence890;
+                Object oldString890 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(890);
+                if (oldString890 instanceof Utf8) {
+                    charSequence890 = (decoder).readString(((Utf8) oldString890));
+                } else {
+                    charSequence890 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(890, charSequence890);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F890': "+ unionIndex890));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema445(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex891 = (decoder.readIndex());
+        if (unionIndex891 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, null);
+        } else {
+            if (unionIndex891 == 1) {
+                Utf8 charSequence891;
+                Object oldString891 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(891);
+                if (oldString891 instanceof Utf8) {
+                    charSequence891 = (decoder).readString(((Utf8) oldString891));
+                } else {
+                    charSequence891 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(891, charSequence891);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F891': "+ unionIndex891));
+            }
+        }
+        int unionIndex892 = (decoder.readIndex());
+        if (unionIndex892 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, null);
+        } else {
+            if (unionIndex892 == 1) {
+                Utf8 charSequence892;
+                Object oldString892 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(892);
+                if (oldString892 instanceof Utf8) {
+                    charSequence892 = (decoder).readString(((Utf8) oldString892));
+                } else {
+                    charSequence892 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(892, charSequence892);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F892': "+ unionIndex892));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema446(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex893 = (decoder.readIndex());
+        if (unionIndex893 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, null);
+        } else {
+            if (unionIndex893 == 1) {
+                Utf8 charSequence893;
+                Object oldString893 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(893);
+                if (oldString893 instanceof Utf8) {
+                    charSequence893 = (decoder).readString(((Utf8) oldString893));
+                } else {
+                    charSequence893 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(893, charSequence893);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F893': "+ unionIndex893));
+            }
+        }
+        int unionIndex894 = (decoder.readIndex());
+        if (unionIndex894 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, null);
+        } else {
+            if (unionIndex894 == 1) {
+                Utf8 charSequence894;
+                Object oldString894 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(894);
+                if (oldString894 instanceof Utf8) {
+                    charSequence894 = (decoder).readString(((Utf8) oldString894));
+                } else {
+                    charSequence894 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(894, charSequence894);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F894': "+ unionIndex894));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema447(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex895 = (decoder.readIndex());
+        if (unionIndex895 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, null);
+        } else {
+            if (unionIndex895 == 1) {
+                Utf8 charSequence895;
+                Object oldString895 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(895);
+                if (oldString895 instanceof Utf8) {
+                    charSequence895 = (decoder).readString(((Utf8) oldString895));
+                } else {
+                    charSequence895 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(895, charSequence895);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F895': "+ unionIndex895));
+            }
+        }
+        int unionIndex896 = (decoder.readIndex());
+        if (unionIndex896 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, null);
+        } else {
+            if (unionIndex896 == 1) {
+                Utf8 charSequence896;
+                Object oldString896 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(896);
+                if (oldString896 instanceof Utf8) {
+                    charSequence896 = (decoder).readString(((Utf8) oldString896));
+                } else {
+                    charSequence896 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(896, charSequence896);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F896': "+ unionIndex896));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema448(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex897 = (decoder.readIndex());
+        if (unionIndex897 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, null);
+        } else {
+            if (unionIndex897 == 1) {
+                Utf8 charSequence897;
+                Object oldString897 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(897);
+                if (oldString897 instanceof Utf8) {
+                    charSequence897 = (decoder).readString(((Utf8) oldString897));
+                } else {
+                    charSequence897 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(897, charSequence897);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F897': "+ unionIndex897));
+            }
+        }
+        int unionIndex898 = (decoder.readIndex());
+        if (unionIndex898 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, null);
+        } else {
+            if (unionIndex898 == 1) {
+                Utf8 charSequence898;
+                Object oldString898 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(898);
+                if (oldString898 instanceof Utf8) {
+                    charSequence898 = (decoder).readString(((Utf8) oldString898));
+                } else {
+                    charSequence898 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(898, charSequence898);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F898': "+ unionIndex898));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema449(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex899 = (decoder.readIndex());
+        if (unionIndex899 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, null);
+        } else {
+            if (unionIndex899 == 1) {
+                Utf8 charSequence899;
+                Object oldString899 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(899);
+                if (oldString899 instanceof Utf8) {
+                    charSequence899 = (decoder).readString(((Utf8) oldString899));
+                } else {
+                    charSequence899 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(899, charSequence899);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F899': "+ unionIndex899));
+            }
+        }
+        int unionIndex900 = (decoder.readIndex());
+        if (unionIndex900 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, null);
+        } else {
+            if (unionIndex900 == 1) {
+                Utf8 charSequence900;
+                Object oldString900 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(900);
+                if (oldString900 instanceof Utf8) {
+                    charSequence900 = (decoder).readString(((Utf8) oldString900));
+                } else {
+                    charSequence900 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(900, charSequence900);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F900': "+ unionIndex900));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema450(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex901 = (decoder.readIndex());
+        if (unionIndex901 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, null);
+        } else {
+            if (unionIndex901 == 1) {
+                Utf8 charSequence901;
+                Object oldString901 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(901);
+                if (oldString901 instanceof Utf8) {
+                    charSequence901 = (decoder).readString(((Utf8) oldString901));
+                } else {
+                    charSequence901 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(901, charSequence901);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F901': "+ unionIndex901));
+            }
+        }
+        int unionIndex902 = (decoder.readIndex());
+        if (unionIndex902 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, null);
+        } else {
+            if (unionIndex902 == 1) {
+                Utf8 charSequence902;
+                Object oldString902 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(902);
+                if (oldString902 instanceof Utf8) {
+                    charSequence902 = (decoder).readString(((Utf8) oldString902));
+                } else {
+                    charSequence902 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(902, charSequence902);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F902': "+ unionIndex902));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema451(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex903 = (decoder.readIndex());
+        if (unionIndex903 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, null);
+        } else {
+            if (unionIndex903 == 1) {
+                Utf8 charSequence903;
+                Object oldString903 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(903);
+                if (oldString903 instanceof Utf8) {
+                    charSequence903 = (decoder).readString(((Utf8) oldString903));
+                } else {
+                    charSequence903 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(903, charSequence903);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F903': "+ unionIndex903));
+            }
+        }
+        int unionIndex904 = (decoder.readIndex());
+        if (unionIndex904 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, null);
+        } else {
+            if (unionIndex904 == 1) {
+                Utf8 charSequence904;
+                Object oldString904 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(904);
+                if (oldString904 instanceof Utf8) {
+                    charSequence904 = (decoder).readString(((Utf8) oldString904));
+                } else {
+                    charSequence904 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(904, charSequence904);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F904': "+ unionIndex904));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema452(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex905 = (decoder.readIndex());
+        if (unionIndex905 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, null);
+        } else {
+            if (unionIndex905 == 1) {
+                Utf8 charSequence905;
+                Object oldString905 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(905);
+                if (oldString905 instanceof Utf8) {
+                    charSequence905 = (decoder).readString(((Utf8) oldString905));
+                } else {
+                    charSequence905 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(905, charSequence905);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F905': "+ unionIndex905));
+            }
+        }
+        int unionIndex906 = (decoder.readIndex());
+        if (unionIndex906 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, null);
+        } else {
+            if (unionIndex906 == 1) {
+                Utf8 charSequence906;
+                Object oldString906 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(906);
+                if (oldString906 instanceof Utf8) {
+                    charSequence906 = (decoder).readString(((Utf8) oldString906));
+                } else {
+                    charSequence906 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(906, charSequence906);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F906': "+ unionIndex906));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema453(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex907 = (decoder.readIndex());
+        if (unionIndex907 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, null);
+        } else {
+            if (unionIndex907 == 1) {
+                Utf8 charSequence907;
+                Object oldString907 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(907);
+                if (oldString907 instanceof Utf8) {
+                    charSequence907 = (decoder).readString(((Utf8) oldString907));
+                } else {
+                    charSequence907 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(907, charSequence907);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F907': "+ unionIndex907));
+            }
+        }
+        int unionIndex908 = (decoder.readIndex());
+        if (unionIndex908 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, null);
+        } else {
+            if (unionIndex908 == 1) {
+                Utf8 charSequence908;
+                Object oldString908 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(908);
+                if (oldString908 instanceof Utf8) {
+                    charSequence908 = (decoder).readString(((Utf8) oldString908));
+                } else {
+                    charSequence908 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(908, charSequence908);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F908': "+ unionIndex908));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema454(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex909 = (decoder.readIndex());
+        if (unionIndex909 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, null);
+        } else {
+            if (unionIndex909 == 1) {
+                Utf8 charSequence909;
+                Object oldString909 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(909);
+                if (oldString909 instanceof Utf8) {
+                    charSequence909 = (decoder).readString(((Utf8) oldString909));
+                } else {
+                    charSequence909 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(909, charSequence909);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F909': "+ unionIndex909));
+            }
+        }
+        int unionIndex910 = (decoder.readIndex());
+        if (unionIndex910 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, null);
+        } else {
+            if (unionIndex910 == 1) {
+                Utf8 charSequence910;
+                Object oldString910 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(910);
+                if (oldString910 instanceof Utf8) {
+                    charSequence910 = (decoder).readString(((Utf8) oldString910));
+                } else {
+                    charSequence910 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(910, charSequence910);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F910': "+ unionIndex910));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema455(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex911 = (decoder.readIndex());
+        if (unionIndex911 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, null);
+        } else {
+            if (unionIndex911 == 1) {
+                Utf8 charSequence911;
+                Object oldString911 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(911);
+                if (oldString911 instanceof Utf8) {
+                    charSequence911 = (decoder).readString(((Utf8) oldString911));
+                } else {
+                    charSequence911 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(911, charSequence911);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F911': "+ unionIndex911));
+            }
+        }
+        int unionIndex912 = (decoder.readIndex());
+        if (unionIndex912 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, null);
+        } else {
+            if (unionIndex912 == 1) {
+                Utf8 charSequence912;
+                Object oldString912 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(912);
+                if (oldString912 instanceof Utf8) {
+                    charSequence912 = (decoder).readString(((Utf8) oldString912));
+                } else {
+                    charSequence912 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(912, charSequence912);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F912': "+ unionIndex912));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema456(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex913 = (decoder.readIndex());
+        if (unionIndex913 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, null);
+        } else {
+            if (unionIndex913 == 1) {
+                Utf8 charSequence913;
+                Object oldString913 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(913);
+                if (oldString913 instanceof Utf8) {
+                    charSequence913 = (decoder).readString(((Utf8) oldString913));
+                } else {
+                    charSequence913 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(913, charSequence913);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F913': "+ unionIndex913));
+            }
+        }
+        int unionIndex914 = (decoder.readIndex());
+        if (unionIndex914 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, null);
+        } else {
+            if (unionIndex914 == 1) {
+                Utf8 charSequence914;
+                Object oldString914 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(914);
+                if (oldString914 instanceof Utf8) {
+                    charSequence914 = (decoder).readString(((Utf8) oldString914));
+                } else {
+                    charSequence914 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(914, charSequence914);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F914': "+ unionIndex914));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema457(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex915 = (decoder.readIndex());
+        if (unionIndex915 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, null);
+        } else {
+            if (unionIndex915 == 1) {
+                Utf8 charSequence915;
+                Object oldString915 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(915);
+                if (oldString915 instanceof Utf8) {
+                    charSequence915 = (decoder).readString(((Utf8) oldString915));
+                } else {
+                    charSequence915 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(915, charSequence915);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F915': "+ unionIndex915));
+            }
+        }
+        int unionIndex916 = (decoder.readIndex());
+        if (unionIndex916 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, null);
+        } else {
+            if (unionIndex916 == 1) {
+                Utf8 charSequence916;
+                Object oldString916 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(916);
+                if (oldString916 instanceof Utf8) {
+                    charSequence916 = (decoder).readString(((Utf8) oldString916));
+                } else {
+                    charSequence916 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(916, charSequence916);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F916': "+ unionIndex916));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema458(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex917 = (decoder.readIndex());
+        if (unionIndex917 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, null);
+        } else {
+            if (unionIndex917 == 1) {
+                Utf8 charSequence917;
+                Object oldString917 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(917);
+                if (oldString917 instanceof Utf8) {
+                    charSequence917 = (decoder).readString(((Utf8) oldString917));
+                } else {
+                    charSequence917 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(917, charSequence917);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F917': "+ unionIndex917));
+            }
+        }
+        int unionIndex918 = (decoder.readIndex());
+        if (unionIndex918 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, null);
+        } else {
+            if (unionIndex918 == 1) {
+                Utf8 charSequence918;
+                Object oldString918 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(918);
+                if (oldString918 instanceof Utf8) {
+                    charSequence918 = (decoder).readString(((Utf8) oldString918));
+                } else {
+                    charSequence918 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(918, charSequence918);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F918': "+ unionIndex918));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema459(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex919 = (decoder.readIndex());
+        if (unionIndex919 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, null);
+        } else {
+            if (unionIndex919 == 1) {
+                Utf8 charSequence919;
+                Object oldString919 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(919);
+                if (oldString919 instanceof Utf8) {
+                    charSequence919 = (decoder).readString(((Utf8) oldString919));
+                } else {
+                    charSequence919 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(919, charSequence919);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F919': "+ unionIndex919));
+            }
+        }
+        int unionIndex920 = (decoder.readIndex());
+        if (unionIndex920 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, null);
+        } else {
+            if (unionIndex920 == 1) {
+                Utf8 charSequence920;
+                Object oldString920 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(920);
+                if (oldString920 instanceof Utf8) {
+                    charSequence920 = (decoder).readString(((Utf8) oldString920));
+                } else {
+                    charSequence920 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(920, charSequence920);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F920': "+ unionIndex920));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema460(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex921 = (decoder.readIndex());
+        if (unionIndex921 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, null);
+        } else {
+            if (unionIndex921 == 1) {
+                Utf8 charSequence921;
+                Object oldString921 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(921);
+                if (oldString921 instanceof Utf8) {
+                    charSequence921 = (decoder).readString(((Utf8) oldString921));
+                } else {
+                    charSequence921 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(921, charSequence921);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F921': "+ unionIndex921));
+            }
+        }
+        int unionIndex922 = (decoder.readIndex());
+        if (unionIndex922 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, null);
+        } else {
+            if (unionIndex922 == 1) {
+                Utf8 charSequence922;
+                Object oldString922 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(922);
+                if (oldString922 instanceof Utf8) {
+                    charSequence922 = (decoder).readString(((Utf8) oldString922));
+                } else {
+                    charSequence922 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(922, charSequence922);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F922': "+ unionIndex922));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema461(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex923 = (decoder.readIndex());
+        if (unionIndex923 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, null);
+        } else {
+            if (unionIndex923 == 1) {
+                Utf8 charSequence923;
+                Object oldString923 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(923);
+                if (oldString923 instanceof Utf8) {
+                    charSequence923 = (decoder).readString(((Utf8) oldString923));
+                } else {
+                    charSequence923 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(923, charSequence923);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F923': "+ unionIndex923));
+            }
+        }
+        int unionIndex924 = (decoder.readIndex());
+        if (unionIndex924 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, null);
+        } else {
+            if (unionIndex924 == 1) {
+                Utf8 charSequence924;
+                Object oldString924 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(924);
+                if (oldString924 instanceof Utf8) {
+                    charSequence924 = (decoder).readString(((Utf8) oldString924));
+                } else {
+                    charSequence924 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(924, charSequence924);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F924': "+ unionIndex924));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema462(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex925 = (decoder.readIndex());
+        if (unionIndex925 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, null);
+        } else {
+            if (unionIndex925 == 1) {
+                Utf8 charSequence925;
+                Object oldString925 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(925);
+                if (oldString925 instanceof Utf8) {
+                    charSequence925 = (decoder).readString(((Utf8) oldString925));
+                } else {
+                    charSequence925 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(925, charSequence925);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F925': "+ unionIndex925));
+            }
+        }
+        int unionIndex926 = (decoder.readIndex());
+        if (unionIndex926 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, null);
+        } else {
+            if (unionIndex926 == 1) {
+                Utf8 charSequence926;
+                Object oldString926 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(926);
+                if (oldString926 instanceof Utf8) {
+                    charSequence926 = (decoder).readString(((Utf8) oldString926));
+                } else {
+                    charSequence926 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(926, charSequence926);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F926': "+ unionIndex926));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema463(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex927 = (decoder.readIndex());
+        if (unionIndex927 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, null);
+        } else {
+            if (unionIndex927 == 1) {
+                Utf8 charSequence927;
+                Object oldString927 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(927);
+                if (oldString927 instanceof Utf8) {
+                    charSequence927 = (decoder).readString(((Utf8) oldString927));
+                } else {
+                    charSequence927 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(927, charSequence927);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F927': "+ unionIndex927));
+            }
+        }
+        int unionIndex928 = (decoder.readIndex());
+        if (unionIndex928 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, null);
+        } else {
+            if (unionIndex928 == 1) {
+                Utf8 charSequence928;
+                Object oldString928 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(928);
+                if (oldString928 instanceof Utf8) {
+                    charSequence928 = (decoder).readString(((Utf8) oldString928));
+                } else {
+                    charSequence928 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(928, charSequence928);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F928': "+ unionIndex928));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema464(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex929 = (decoder.readIndex());
+        if (unionIndex929 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, null);
+        } else {
+            if (unionIndex929 == 1) {
+                Utf8 charSequence929;
+                Object oldString929 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(929);
+                if (oldString929 instanceof Utf8) {
+                    charSequence929 = (decoder).readString(((Utf8) oldString929));
+                } else {
+                    charSequence929 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(929, charSequence929);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F929': "+ unionIndex929));
+            }
+        }
+        int unionIndex930 = (decoder.readIndex());
+        if (unionIndex930 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, null);
+        } else {
+            if (unionIndex930 == 1) {
+                Utf8 charSequence930;
+                Object oldString930 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(930);
+                if (oldString930 instanceof Utf8) {
+                    charSequence930 = (decoder).readString(((Utf8) oldString930));
+                } else {
+                    charSequence930 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(930, charSequence930);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F930': "+ unionIndex930));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema465(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex931 = (decoder.readIndex());
+        if (unionIndex931 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, null);
+        } else {
+            if (unionIndex931 == 1) {
+                Utf8 charSequence931;
+                Object oldString931 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(931);
+                if (oldString931 instanceof Utf8) {
+                    charSequence931 = (decoder).readString(((Utf8) oldString931));
+                } else {
+                    charSequence931 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(931, charSequence931);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F931': "+ unionIndex931));
+            }
+        }
+        int unionIndex932 = (decoder.readIndex());
+        if (unionIndex932 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, null);
+        } else {
+            if (unionIndex932 == 1) {
+                Utf8 charSequence932;
+                Object oldString932 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(932);
+                if (oldString932 instanceof Utf8) {
+                    charSequence932 = (decoder).readString(((Utf8) oldString932));
+                } else {
+                    charSequence932 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(932, charSequence932);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F932': "+ unionIndex932));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema466(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex933 = (decoder.readIndex());
+        if (unionIndex933 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, null);
+        } else {
+            if (unionIndex933 == 1) {
+                Utf8 charSequence933;
+                Object oldString933 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(933);
+                if (oldString933 instanceof Utf8) {
+                    charSequence933 = (decoder).readString(((Utf8) oldString933));
+                } else {
+                    charSequence933 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(933, charSequence933);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F933': "+ unionIndex933));
+            }
+        }
+        int unionIndex934 = (decoder.readIndex());
+        if (unionIndex934 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, null);
+        } else {
+            if (unionIndex934 == 1) {
+                Utf8 charSequence934;
+                Object oldString934 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(934);
+                if (oldString934 instanceof Utf8) {
+                    charSequence934 = (decoder).readString(((Utf8) oldString934));
+                } else {
+                    charSequence934 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(934, charSequence934);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F934': "+ unionIndex934));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema467(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex935 = (decoder.readIndex());
+        if (unionIndex935 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, null);
+        } else {
+            if (unionIndex935 == 1) {
+                Utf8 charSequence935;
+                Object oldString935 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(935);
+                if (oldString935 instanceof Utf8) {
+                    charSequence935 = (decoder).readString(((Utf8) oldString935));
+                } else {
+                    charSequence935 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(935, charSequence935);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F935': "+ unionIndex935));
+            }
+        }
+        int unionIndex936 = (decoder.readIndex());
+        if (unionIndex936 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, null);
+        } else {
+            if (unionIndex936 == 1) {
+                Utf8 charSequence936;
+                Object oldString936 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(936);
+                if (oldString936 instanceof Utf8) {
+                    charSequence936 = (decoder).readString(((Utf8) oldString936));
+                } else {
+                    charSequence936 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(936, charSequence936);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F936': "+ unionIndex936));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema468(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex937 = (decoder.readIndex());
+        if (unionIndex937 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, null);
+        } else {
+            if (unionIndex937 == 1) {
+                Utf8 charSequence937;
+                Object oldString937 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(937);
+                if (oldString937 instanceof Utf8) {
+                    charSequence937 = (decoder).readString(((Utf8) oldString937));
+                } else {
+                    charSequence937 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(937, charSequence937);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F937': "+ unionIndex937));
+            }
+        }
+        int unionIndex938 = (decoder.readIndex());
+        if (unionIndex938 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, null);
+        } else {
+            if (unionIndex938 == 1) {
+                Utf8 charSequence938;
+                Object oldString938 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(938);
+                if (oldString938 instanceof Utf8) {
+                    charSequence938 = (decoder).readString(((Utf8) oldString938));
+                } else {
+                    charSequence938 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(938, charSequence938);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F938': "+ unionIndex938));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema469(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex939 = (decoder.readIndex());
+        if (unionIndex939 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, null);
+        } else {
+            if (unionIndex939 == 1) {
+                Utf8 charSequence939;
+                Object oldString939 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(939);
+                if (oldString939 instanceof Utf8) {
+                    charSequence939 = (decoder).readString(((Utf8) oldString939));
+                } else {
+                    charSequence939 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(939, charSequence939);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F939': "+ unionIndex939));
+            }
+        }
+        int unionIndex940 = (decoder.readIndex());
+        if (unionIndex940 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, null);
+        } else {
+            if (unionIndex940 == 1) {
+                Utf8 charSequence940;
+                Object oldString940 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(940);
+                if (oldString940 instanceof Utf8) {
+                    charSequence940 = (decoder).readString(((Utf8) oldString940));
+                } else {
+                    charSequence940 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(940, charSequence940);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F940': "+ unionIndex940));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema470(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex941 = (decoder.readIndex());
+        if (unionIndex941 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, null);
+        } else {
+            if (unionIndex941 == 1) {
+                Utf8 charSequence941;
+                Object oldString941 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(941);
+                if (oldString941 instanceof Utf8) {
+                    charSequence941 = (decoder).readString(((Utf8) oldString941));
+                } else {
+                    charSequence941 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(941, charSequence941);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F941': "+ unionIndex941));
+            }
+        }
+        int unionIndex942 = (decoder.readIndex());
+        if (unionIndex942 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, null);
+        } else {
+            if (unionIndex942 == 1) {
+                Utf8 charSequence942;
+                Object oldString942 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(942);
+                if (oldString942 instanceof Utf8) {
+                    charSequence942 = (decoder).readString(((Utf8) oldString942));
+                } else {
+                    charSequence942 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(942, charSequence942);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F942': "+ unionIndex942));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema471(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex943 = (decoder.readIndex());
+        if (unionIndex943 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, null);
+        } else {
+            if (unionIndex943 == 1) {
+                Utf8 charSequence943;
+                Object oldString943 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(943);
+                if (oldString943 instanceof Utf8) {
+                    charSequence943 = (decoder).readString(((Utf8) oldString943));
+                } else {
+                    charSequence943 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(943, charSequence943);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F943': "+ unionIndex943));
+            }
+        }
+        int unionIndex944 = (decoder.readIndex());
+        if (unionIndex944 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, null);
+        } else {
+            if (unionIndex944 == 1) {
+                Utf8 charSequence944;
+                Object oldString944 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(944);
+                if (oldString944 instanceof Utf8) {
+                    charSequence944 = (decoder).readString(((Utf8) oldString944));
+                } else {
+                    charSequence944 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(944, charSequence944);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F944': "+ unionIndex944));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema472(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex945 = (decoder.readIndex());
+        if (unionIndex945 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, null);
+        } else {
+            if (unionIndex945 == 1) {
+                Utf8 charSequence945;
+                Object oldString945 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(945);
+                if (oldString945 instanceof Utf8) {
+                    charSequence945 = (decoder).readString(((Utf8) oldString945));
+                } else {
+                    charSequence945 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(945, charSequence945);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F945': "+ unionIndex945));
+            }
+        }
+        int unionIndex946 = (decoder.readIndex());
+        if (unionIndex946 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, null);
+        } else {
+            if (unionIndex946 == 1) {
+                Utf8 charSequence946;
+                Object oldString946 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(946);
+                if (oldString946 instanceof Utf8) {
+                    charSequence946 = (decoder).readString(((Utf8) oldString946));
+                } else {
+                    charSequence946 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(946, charSequence946);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F946': "+ unionIndex946));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema473(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex947 = (decoder.readIndex());
+        if (unionIndex947 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, null);
+        } else {
+            if (unionIndex947 == 1) {
+                Utf8 charSequence947;
+                Object oldString947 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(947);
+                if (oldString947 instanceof Utf8) {
+                    charSequence947 = (decoder).readString(((Utf8) oldString947));
+                } else {
+                    charSequence947 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(947, charSequence947);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F947': "+ unionIndex947));
+            }
+        }
+        int unionIndex948 = (decoder.readIndex());
+        if (unionIndex948 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, null);
+        } else {
+            if (unionIndex948 == 1) {
+                Utf8 charSequence948;
+                Object oldString948 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(948);
+                if (oldString948 instanceof Utf8) {
+                    charSequence948 = (decoder).readString(((Utf8) oldString948));
+                } else {
+                    charSequence948 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(948, charSequence948);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F948': "+ unionIndex948));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema474(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex949 = (decoder.readIndex());
+        if (unionIndex949 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, null);
+        } else {
+            if (unionIndex949 == 1) {
+                Utf8 charSequence949;
+                Object oldString949 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(949);
+                if (oldString949 instanceof Utf8) {
+                    charSequence949 = (decoder).readString(((Utf8) oldString949));
+                } else {
+                    charSequence949 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(949, charSequence949);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F949': "+ unionIndex949));
+            }
+        }
+        int unionIndex950 = (decoder.readIndex());
+        if (unionIndex950 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, null);
+        } else {
+            if (unionIndex950 == 1) {
+                Utf8 charSequence950;
+                Object oldString950 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(950);
+                if (oldString950 instanceof Utf8) {
+                    charSequence950 = (decoder).readString(((Utf8) oldString950));
+                } else {
+                    charSequence950 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(950, charSequence950);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F950': "+ unionIndex950));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema475(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex951 = (decoder.readIndex());
+        if (unionIndex951 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, null);
+        } else {
+            if (unionIndex951 == 1) {
+                Utf8 charSequence951;
+                Object oldString951 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(951);
+                if (oldString951 instanceof Utf8) {
+                    charSequence951 = (decoder).readString(((Utf8) oldString951));
+                } else {
+                    charSequence951 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(951, charSequence951);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F951': "+ unionIndex951));
+            }
+        }
+        int unionIndex952 = (decoder.readIndex());
+        if (unionIndex952 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, null);
+        } else {
+            if (unionIndex952 == 1) {
+                Utf8 charSequence952;
+                Object oldString952 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(952);
+                if (oldString952 instanceof Utf8) {
+                    charSequence952 = (decoder).readString(((Utf8) oldString952));
+                } else {
+                    charSequence952 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(952, charSequence952);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F952': "+ unionIndex952));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema476(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex953 = (decoder.readIndex());
+        if (unionIndex953 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, null);
+        } else {
+            if (unionIndex953 == 1) {
+                Utf8 charSequence953;
+                Object oldString953 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(953);
+                if (oldString953 instanceof Utf8) {
+                    charSequence953 = (decoder).readString(((Utf8) oldString953));
+                } else {
+                    charSequence953 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(953, charSequence953);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F953': "+ unionIndex953));
+            }
+        }
+        int unionIndex954 = (decoder.readIndex());
+        if (unionIndex954 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, null);
+        } else {
+            if (unionIndex954 == 1) {
+                Utf8 charSequence954;
+                Object oldString954 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(954);
+                if (oldString954 instanceof Utf8) {
+                    charSequence954 = (decoder).readString(((Utf8) oldString954));
+                } else {
+                    charSequence954 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(954, charSequence954);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F954': "+ unionIndex954));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema477(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex955 = (decoder.readIndex());
+        if (unionIndex955 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, null);
+        } else {
+            if (unionIndex955 == 1) {
+                Utf8 charSequence955;
+                Object oldString955 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(955);
+                if (oldString955 instanceof Utf8) {
+                    charSequence955 = (decoder).readString(((Utf8) oldString955));
+                } else {
+                    charSequence955 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(955, charSequence955);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F955': "+ unionIndex955));
+            }
+        }
+        int unionIndex956 = (decoder.readIndex());
+        if (unionIndex956 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, null);
+        } else {
+            if (unionIndex956 == 1) {
+                Utf8 charSequence956;
+                Object oldString956 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(956);
+                if (oldString956 instanceof Utf8) {
+                    charSequence956 = (decoder).readString(((Utf8) oldString956));
+                } else {
+                    charSequence956 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(956, charSequence956);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F956': "+ unionIndex956));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema478(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex957 = (decoder.readIndex());
+        if (unionIndex957 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, null);
+        } else {
+            if (unionIndex957 == 1) {
+                Utf8 charSequence957;
+                Object oldString957 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(957);
+                if (oldString957 instanceof Utf8) {
+                    charSequence957 = (decoder).readString(((Utf8) oldString957));
+                } else {
+                    charSequence957 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(957, charSequence957);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F957': "+ unionIndex957));
+            }
+        }
+        int unionIndex958 = (decoder.readIndex());
+        if (unionIndex958 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, null);
+        } else {
+            if (unionIndex958 == 1) {
+                Utf8 charSequence958;
+                Object oldString958 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(958);
+                if (oldString958 instanceof Utf8) {
+                    charSequence958 = (decoder).readString(((Utf8) oldString958));
+                } else {
+                    charSequence958 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(958, charSequence958);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F958': "+ unionIndex958));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema479(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex959 = (decoder.readIndex());
+        if (unionIndex959 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, null);
+        } else {
+            if (unionIndex959 == 1) {
+                Utf8 charSequence959;
+                Object oldString959 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(959);
+                if (oldString959 instanceof Utf8) {
+                    charSequence959 = (decoder).readString(((Utf8) oldString959));
+                } else {
+                    charSequence959 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(959, charSequence959);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F959': "+ unionIndex959));
+            }
+        }
+        int unionIndex960 = (decoder.readIndex());
+        if (unionIndex960 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, null);
+        } else {
+            if (unionIndex960 == 1) {
+                Utf8 charSequence960;
+                Object oldString960 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(960);
+                if (oldString960 instanceof Utf8) {
+                    charSequence960 = (decoder).readString(((Utf8) oldString960));
+                } else {
+                    charSequence960 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(960, charSequence960);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F960': "+ unionIndex960));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema480(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex961 = (decoder.readIndex());
+        if (unionIndex961 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, null);
+        } else {
+            if (unionIndex961 == 1) {
+                Utf8 charSequence961;
+                Object oldString961 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(961);
+                if (oldString961 instanceof Utf8) {
+                    charSequence961 = (decoder).readString(((Utf8) oldString961));
+                } else {
+                    charSequence961 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(961, charSequence961);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F961': "+ unionIndex961));
+            }
+        }
+        int unionIndex962 = (decoder.readIndex());
+        if (unionIndex962 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, null);
+        } else {
+            if (unionIndex962 == 1) {
+                Utf8 charSequence962;
+                Object oldString962 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(962);
+                if (oldString962 instanceof Utf8) {
+                    charSequence962 = (decoder).readString(((Utf8) oldString962));
+                } else {
+                    charSequence962 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(962, charSequence962);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F962': "+ unionIndex962));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema481(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex963 = (decoder.readIndex());
+        if (unionIndex963 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, null);
+        } else {
+            if (unionIndex963 == 1) {
+                Utf8 charSequence963;
+                Object oldString963 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(963);
+                if (oldString963 instanceof Utf8) {
+                    charSequence963 = (decoder).readString(((Utf8) oldString963));
+                } else {
+                    charSequence963 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(963, charSequence963);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F963': "+ unionIndex963));
+            }
+        }
+        int unionIndex964 = (decoder.readIndex());
+        if (unionIndex964 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, null);
+        } else {
+            if (unionIndex964 == 1) {
+                Utf8 charSequence964;
+                Object oldString964 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(964);
+                if (oldString964 instanceof Utf8) {
+                    charSequence964 = (decoder).readString(((Utf8) oldString964));
+                } else {
+                    charSequence964 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(964, charSequence964);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F964': "+ unionIndex964));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema482(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex965 = (decoder.readIndex());
+        if (unionIndex965 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, null);
+        } else {
+            if (unionIndex965 == 1) {
+                Utf8 charSequence965;
+                Object oldString965 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(965);
+                if (oldString965 instanceof Utf8) {
+                    charSequence965 = (decoder).readString(((Utf8) oldString965));
+                } else {
+                    charSequence965 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(965, charSequence965);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F965': "+ unionIndex965));
+            }
+        }
+        int unionIndex966 = (decoder.readIndex());
+        if (unionIndex966 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, null);
+        } else {
+            if (unionIndex966 == 1) {
+                Utf8 charSequence966;
+                Object oldString966 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(966);
+                if (oldString966 instanceof Utf8) {
+                    charSequence966 = (decoder).readString(((Utf8) oldString966));
+                } else {
+                    charSequence966 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(966, charSequence966);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F966': "+ unionIndex966));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema483(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex967 = (decoder.readIndex());
+        if (unionIndex967 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, null);
+        } else {
+            if (unionIndex967 == 1) {
+                Utf8 charSequence967;
+                Object oldString967 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(967);
+                if (oldString967 instanceof Utf8) {
+                    charSequence967 = (decoder).readString(((Utf8) oldString967));
+                } else {
+                    charSequence967 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(967, charSequence967);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F967': "+ unionIndex967));
+            }
+        }
+        int unionIndex968 = (decoder.readIndex());
+        if (unionIndex968 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, null);
+        } else {
+            if (unionIndex968 == 1) {
+                Utf8 charSequence968;
+                Object oldString968 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(968);
+                if (oldString968 instanceof Utf8) {
+                    charSequence968 = (decoder).readString(((Utf8) oldString968));
+                } else {
+                    charSequence968 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(968, charSequence968);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F968': "+ unionIndex968));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema484(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex969 = (decoder.readIndex());
+        if (unionIndex969 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, null);
+        } else {
+            if (unionIndex969 == 1) {
+                Utf8 charSequence969;
+                Object oldString969 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(969);
+                if (oldString969 instanceof Utf8) {
+                    charSequence969 = (decoder).readString(((Utf8) oldString969));
+                } else {
+                    charSequence969 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(969, charSequence969);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F969': "+ unionIndex969));
+            }
+        }
+        int unionIndex970 = (decoder.readIndex());
+        if (unionIndex970 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, null);
+        } else {
+            if (unionIndex970 == 1) {
+                Utf8 charSequence970;
+                Object oldString970 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(970);
+                if (oldString970 instanceof Utf8) {
+                    charSequence970 = (decoder).readString(((Utf8) oldString970));
+                } else {
+                    charSequence970 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(970, charSequence970);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F970': "+ unionIndex970));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema485(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex971 = (decoder.readIndex());
+        if (unionIndex971 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, null);
+        } else {
+            if (unionIndex971 == 1) {
+                Utf8 charSequence971;
+                Object oldString971 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(971);
+                if (oldString971 instanceof Utf8) {
+                    charSequence971 = (decoder).readString(((Utf8) oldString971));
+                } else {
+                    charSequence971 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(971, charSequence971);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F971': "+ unionIndex971));
+            }
+        }
+        int unionIndex972 = (decoder.readIndex());
+        if (unionIndex972 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, null);
+        } else {
+            if (unionIndex972 == 1) {
+                Utf8 charSequence972;
+                Object oldString972 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(972);
+                if (oldString972 instanceof Utf8) {
+                    charSequence972 = (decoder).readString(((Utf8) oldString972));
+                } else {
+                    charSequence972 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(972, charSequence972);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F972': "+ unionIndex972));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema486(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex973 = (decoder.readIndex());
+        if (unionIndex973 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, null);
+        } else {
+            if (unionIndex973 == 1) {
+                Utf8 charSequence973;
+                Object oldString973 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(973);
+                if (oldString973 instanceof Utf8) {
+                    charSequence973 = (decoder).readString(((Utf8) oldString973));
+                } else {
+                    charSequence973 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(973, charSequence973);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F973': "+ unionIndex973));
+            }
+        }
+        int unionIndex974 = (decoder.readIndex());
+        if (unionIndex974 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, null);
+        } else {
+            if (unionIndex974 == 1) {
+                Utf8 charSequence974;
+                Object oldString974 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(974);
+                if (oldString974 instanceof Utf8) {
+                    charSequence974 = (decoder).readString(((Utf8) oldString974));
+                } else {
+                    charSequence974 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(974, charSequence974);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F974': "+ unionIndex974));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema487(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex975 = (decoder.readIndex());
+        if (unionIndex975 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, null);
+        } else {
+            if (unionIndex975 == 1) {
+                Utf8 charSequence975;
+                Object oldString975 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(975);
+                if (oldString975 instanceof Utf8) {
+                    charSequence975 = (decoder).readString(((Utf8) oldString975));
+                } else {
+                    charSequence975 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(975, charSequence975);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F975': "+ unionIndex975));
+            }
+        }
+        int unionIndex976 = (decoder.readIndex());
+        if (unionIndex976 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, null);
+        } else {
+            if (unionIndex976 == 1) {
+                Utf8 charSequence976;
+                Object oldString976 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(976);
+                if (oldString976 instanceof Utf8) {
+                    charSequence976 = (decoder).readString(((Utf8) oldString976));
+                } else {
+                    charSequence976 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(976, charSequence976);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F976': "+ unionIndex976));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema488(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex977 = (decoder.readIndex());
+        if (unionIndex977 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, null);
+        } else {
+            if (unionIndex977 == 1) {
+                Utf8 charSequence977;
+                Object oldString977 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(977);
+                if (oldString977 instanceof Utf8) {
+                    charSequence977 = (decoder).readString(((Utf8) oldString977));
+                } else {
+                    charSequence977 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(977, charSequence977);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F977': "+ unionIndex977));
+            }
+        }
+        int unionIndex978 = (decoder.readIndex());
+        if (unionIndex978 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, null);
+        } else {
+            if (unionIndex978 == 1) {
+                Utf8 charSequence978;
+                Object oldString978 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(978);
+                if (oldString978 instanceof Utf8) {
+                    charSequence978 = (decoder).readString(((Utf8) oldString978));
+                } else {
+                    charSequence978 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(978, charSequence978);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F978': "+ unionIndex978));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema489(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex979 = (decoder.readIndex());
+        if (unionIndex979 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, null);
+        } else {
+            if (unionIndex979 == 1) {
+                Utf8 charSequence979;
+                Object oldString979 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(979);
+                if (oldString979 instanceof Utf8) {
+                    charSequence979 = (decoder).readString(((Utf8) oldString979));
+                } else {
+                    charSequence979 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(979, charSequence979);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F979': "+ unionIndex979));
+            }
+        }
+        int unionIndex980 = (decoder.readIndex());
+        if (unionIndex980 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, null);
+        } else {
+            if (unionIndex980 == 1) {
+                Utf8 charSequence980;
+                Object oldString980 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(980);
+                if (oldString980 instanceof Utf8) {
+                    charSequence980 = (decoder).readString(((Utf8) oldString980));
+                } else {
+                    charSequence980 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(980, charSequence980);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F980': "+ unionIndex980));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema490(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex981 = (decoder.readIndex());
+        if (unionIndex981 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, null);
+        } else {
+            if (unionIndex981 == 1) {
+                Utf8 charSequence981;
+                Object oldString981 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(981);
+                if (oldString981 instanceof Utf8) {
+                    charSequence981 = (decoder).readString(((Utf8) oldString981));
+                } else {
+                    charSequence981 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(981, charSequence981);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F981': "+ unionIndex981));
+            }
+        }
+        int unionIndex982 = (decoder.readIndex());
+        if (unionIndex982 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, null);
+        } else {
+            if (unionIndex982 == 1) {
+                Utf8 charSequence982;
+                Object oldString982 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(982);
+                if (oldString982 instanceof Utf8) {
+                    charSequence982 = (decoder).readString(((Utf8) oldString982));
+                } else {
+                    charSequence982 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(982, charSequence982);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F982': "+ unionIndex982));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema491(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex983 = (decoder.readIndex());
+        if (unionIndex983 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, null);
+        } else {
+            if (unionIndex983 == 1) {
+                Utf8 charSequence983;
+                Object oldString983 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(983);
+                if (oldString983 instanceof Utf8) {
+                    charSequence983 = (decoder).readString(((Utf8) oldString983));
+                } else {
+                    charSequence983 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(983, charSequence983);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F983': "+ unionIndex983));
+            }
+        }
+        int unionIndex984 = (decoder.readIndex());
+        if (unionIndex984 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, null);
+        } else {
+            if (unionIndex984 == 1) {
+                Utf8 charSequence984;
+                Object oldString984 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(984);
+                if (oldString984 instanceof Utf8) {
+                    charSequence984 = (decoder).readString(((Utf8) oldString984));
+                } else {
+                    charSequence984 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(984, charSequence984);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F984': "+ unionIndex984));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema492(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex985 = (decoder.readIndex());
+        if (unionIndex985 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, null);
+        } else {
+            if (unionIndex985 == 1) {
+                Utf8 charSequence985;
+                Object oldString985 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(985);
+                if (oldString985 instanceof Utf8) {
+                    charSequence985 = (decoder).readString(((Utf8) oldString985));
+                } else {
+                    charSequence985 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(985, charSequence985);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F985': "+ unionIndex985));
+            }
+        }
+        int unionIndex986 = (decoder.readIndex());
+        if (unionIndex986 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, null);
+        } else {
+            if (unionIndex986 == 1) {
+                Utf8 charSequence986;
+                Object oldString986 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(986);
+                if (oldString986 instanceof Utf8) {
+                    charSequence986 = (decoder).readString(((Utf8) oldString986));
+                } else {
+                    charSequence986 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(986, charSequence986);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F986': "+ unionIndex986));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema493(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex987 = (decoder.readIndex());
+        if (unionIndex987 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, null);
+        } else {
+            if (unionIndex987 == 1) {
+                Utf8 charSequence987;
+                Object oldString987 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(987);
+                if (oldString987 instanceof Utf8) {
+                    charSequence987 = (decoder).readString(((Utf8) oldString987));
+                } else {
+                    charSequence987 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(987, charSequence987);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F987': "+ unionIndex987));
+            }
+        }
+        int unionIndex988 = (decoder.readIndex());
+        if (unionIndex988 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, null);
+        } else {
+            if (unionIndex988 == 1) {
+                Utf8 charSequence988;
+                Object oldString988 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(988);
+                if (oldString988 instanceof Utf8) {
+                    charSequence988 = (decoder).readString(((Utf8) oldString988));
+                } else {
+                    charSequence988 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(988, charSequence988);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F988': "+ unionIndex988));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema494(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex989 = (decoder.readIndex());
+        if (unionIndex989 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, null);
+        } else {
+            if (unionIndex989 == 1) {
+                Utf8 charSequence989;
+                Object oldString989 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(989);
+                if (oldString989 instanceof Utf8) {
+                    charSequence989 = (decoder).readString(((Utf8) oldString989));
+                } else {
+                    charSequence989 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(989, charSequence989);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F989': "+ unionIndex989));
+            }
+        }
+        int unionIndex990 = (decoder.readIndex());
+        if (unionIndex990 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, null);
+        } else {
+            if (unionIndex990 == 1) {
+                Utf8 charSequence990;
+                Object oldString990 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(990);
+                if (oldString990 instanceof Utf8) {
+                    charSequence990 = (decoder).readString(((Utf8) oldString990));
+                } else {
+                    charSequence990 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(990, charSequence990);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F990': "+ unionIndex990));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema495(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex991 = (decoder.readIndex());
+        if (unionIndex991 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, null);
+        } else {
+            if (unionIndex991 == 1) {
+                Utf8 charSequence991;
+                Object oldString991 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(991);
+                if (oldString991 instanceof Utf8) {
+                    charSequence991 = (decoder).readString(((Utf8) oldString991));
+                } else {
+                    charSequence991 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(991, charSequence991);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F991': "+ unionIndex991));
+            }
+        }
+        int unionIndex992 = (decoder.readIndex());
+        if (unionIndex992 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, null);
+        } else {
+            if (unionIndex992 == 1) {
+                Utf8 charSequence992;
+                Object oldString992 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(992);
+                if (oldString992 instanceof Utf8) {
+                    charSequence992 = (decoder).readString(((Utf8) oldString992));
+                } else {
+                    charSequence992 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(992, charSequence992);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F992': "+ unionIndex992));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema496(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex993 = (decoder.readIndex());
+        if (unionIndex993 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, null);
+        } else {
+            if (unionIndex993 == 1) {
+                Utf8 charSequence993;
+                Object oldString993 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(993);
+                if (oldString993 instanceof Utf8) {
+                    charSequence993 = (decoder).readString(((Utf8) oldString993));
+                } else {
+                    charSequence993 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(993, charSequence993);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F993': "+ unionIndex993));
+            }
+        }
+        int unionIndex994 = (decoder.readIndex());
+        if (unionIndex994 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, null);
+        } else {
+            if (unionIndex994 == 1) {
+                Utf8 charSequence994;
+                Object oldString994 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(994);
+                if (oldString994 instanceof Utf8) {
+                    charSequence994 = (decoder).readString(((Utf8) oldString994));
+                } else {
+                    charSequence994 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(994, charSequence994);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F994': "+ unionIndex994));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema497(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex995 = (decoder.readIndex());
+        if (unionIndex995 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, null);
+        } else {
+            if (unionIndex995 == 1) {
+                Utf8 charSequence995;
+                Object oldString995 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(995);
+                if (oldString995 instanceof Utf8) {
+                    charSequence995 = (decoder).readString(((Utf8) oldString995));
+                } else {
+                    charSequence995 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(995, charSequence995);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F995': "+ unionIndex995));
+            }
+        }
+        int unionIndex996 = (decoder.readIndex());
+        if (unionIndex996 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, null);
+        } else {
+            if (unionIndex996 == 1) {
+                Utf8 charSequence996;
+                Object oldString996 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(996);
+                if (oldString996 instanceof Utf8) {
+                    charSequence996 = (decoder).readString(((Utf8) oldString996));
+                } else {
+                    charSequence996 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(996, charSequence996);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F996': "+ unionIndex996));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema498(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex997 = (decoder.readIndex());
+        if (unionIndex997 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, null);
+        } else {
+            if (unionIndex997 == 1) {
+                Utf8 charSequence997;
+                Object oldString997 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(997);
+                if (oldString997 instanceof Utf8) {
+                    charSequence997 = (decoder).readString(((Utf8) oldString997));
+                } else {
+                    charSequence997 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(997, charSequence997);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F997': "+ unionIndex997));
+            }
+        }
+        int unionIndex998 = (decoder.readIndex());
+        if (unionIndex998 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, null);
+        } else {
+            if (unionIndex998 == 1) {
+                Utf8 charSequence998;
+                Object oldString998 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(998);
+                if (oldString998 instanceof Utf8) {
+                    charSequence998 = (decoder).readString(((Utf8) oldString998));
+                } else {
+                    charSequence998 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(998, charSequence998);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F998': "+ unionIndex998));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema499(IndexedRecord FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex999 = (decoder.readIndex());
+        if (unionIndex999 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, null);
+        } else {
+            if (unionIndex999 == 1) {
+                Utf8 charSequence999;
+                Object oldString999 = FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.get(999);
+                if (oldString999 instanceof Utf8) {
+                    charSequence999 = (decoder).readString(((Utf8) oldString999));
+                } else {
+                    charSequence999 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldBeAbleToReadVeryLargeSchema.put(999, charSequence999);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'F999': "+ unionIndex999));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
new file mode 100644
index 000000000..c1d6fa5c9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testString0;
+    private final Schema testStringUnionAlias0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadAliasedField_GenericDeserializer_1824759546_1574596677(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testString0 = readerSchema.getField("testString").schema();
+        this.testStringUnionAlias0 = readerSchema.getField("testStringUnionAlias").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadAliasedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testString': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0((FastGenericDeserializerGeneratorTest_shouldReadAliasedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadAliasedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadAliasedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadAliasedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadAliasedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadAliasedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnionAlias': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java
new file mode 100644
index 000000000..881b1aa83
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158.java
@@ -0,0 +1,206 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnumDefault_GenericDeserializer_693116719_1739184158(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new Integer(0));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(3);
+        tempEnumMapping1 .put(new Integer(0), new Integer(0));
+        tempEnumMapping1 .put(new Integer(1), new Integer(1));
+        tempEnumMapping1 .put(new Integer(2), new Integer(0));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(3);
+        tempEnumMapping2 .put(new Integer(0), new Integer(0));
+        tempEnumMapping2 .put(new Integer(1), new Integer(1));
+        tempEnumMapping2 .put(new Integer(2), new Integer(0));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(3);
+        tempEnumMapping3 .put(new Integer(0), new Integer(0));
+        tempEnumMapping3 .put(new Integer(1), new Integer(1));
+        tempEnumMapping3 .put(new Integer(2), new Integer(0));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnumDefault0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnumDefault0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnumDefault = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnumDefault = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault0((FastGenericDeserializerGeneratorTest_shouldReadEnumDefault), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault1((FastGenericDeserializerGeneratorTest_shouldReadEnumDefault), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnumDefault;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            if (testEnumArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumArray1).reset();
+            } else {
+                testEnumArray1 .clear();
+            }
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnumDefault1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnumDefault, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            if (testEnumUnionArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray1).reset();
+            } else {
+                testEnumUnionArray1 .clear();
+            }
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnumDefault.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
new file mode 100644
index 000000000..6873f0ecb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847.java
@@ -0,0 +1,130 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Schema testEnumUnion0;
+    private final Schema testEnumArray0;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadEnum_GenericDeserializer_695378847_695378847(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(0, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1((FastGenericDeserializerGeneratorTest_shouldReadEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadEnum.put(1, new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            if (testEnumArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumArray1).reset();
+            } else {
+                testEnumArray1 .clear();
+            }
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                testEnumArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            if (testEnumUnionArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray1).reset();
+            } else {
+                testEnumUnionArray1 .clear();
+            }
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        testEnumUnionArray1 .add(new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get((decoder.readEnum()))));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
new file mode 100644
index 000000000..e9e46e2da
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143.java
@@ -0,0 +1,166 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testFixed0;
+    private final Schema testFixedUnion0;
+    private final Schema testFixedArray0;
+    private final Schema testFixedUnionArray0;
+    private final Schema testFixedUnionArrayArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadFixed_GenericDeserializer_1590965143_1590965143(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testFixed0 = readerSchema.getField("testFixed").schema();
+        this.testFixedUnion0 = readerSchema.getField("testFixedUnion").schema();
+        this.testFixedArray0 = readerSchema.getField("testFixedArray").schema();
+        this.testFixedUnionArray0 = readerSchema.getField("testFixedUnionArray").schema();
+        this.testFixedUnionArrayArrayElemSchema0 = testFixedUnionArray0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadFixed0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadFixed = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        byte[] testFixed1;
+        Object oldFixed0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(0);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (2))) {
+            testFixed1 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed1 = ( new byte[2]);
+        }
+        decoder.readFixed(testFixed1);
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(0, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed1));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1((FastGenericDeserializerGeneratorTest_shouldReadFixed), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadFixed;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(1);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (2))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed2);
+                FastGenericDeserializerGeneratorTest_shouldReadFixed.put(1, new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed2));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericFixed> testFixedArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(2);
+        if (oldArray0 instanceof List) {
+            testFixedArray1 = ((List) oldArray0);
+            if (testFixedArray1 instanceof GenericArray) {
+                ((GenericArray) testFixedArray1).reset();
+            } else {
+                testFixedArray1 .clear();
+            }
+        } else {
+            testFixedArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen0), testFixedArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed3;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (2))) {
+                    testFixed3 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed3 = ( new byte[2]);
+                }
+                decoder.readFixed(testFixed3);
+                testFixedArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed3));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(2, testFixedArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadFixed1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadFixed, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadFixed.get(3);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray1 = ((List) oldArray1);
+            if (testFixedUnionArray1 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray1).reset();
+            } else {
+                testFixedUnionArray1 .clear();
+            }
+        } else {
+            testFixedUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericFixed>(((int) chunkLen1), testFixedUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        byte[] testFixed4;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (2))) {
+                            testFixed4 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed4 = ( new byte[2]);
+                        }
+                        decoder.readFixed(testFixed4);
+                        testFixedUnionArray1 .add(new org.apache.avro.generic.GenericData.Fixed(testFixed0, testFixed4));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadFixed.put(3, testFixedUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
new file mode 100644
index 000000000..f9ab05ec5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982.java
@@ -0,0 +1,102 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema union0;
+    private final Schema unionOptionSchema0;
+    private final Schema subField0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion_GenericDeserializer_2643982_2643982(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.union0 = readerSchema.getField("union").schema();
+        this.unionOptionSchema0 = union0 .getTypes().get(1);
+        this.subField0 = unionOptionSchema0 .getField("subField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence1;
+                    Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.get(0);
+                    if (oldString1 instanceof Utf8) {
+                        charSequence1 = (decoder).readString(((Utf8) oldString1));
+                    } else {
+                        charSequence1 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, charSequence1);
+                } else {
+                    if (unionIndex0 == 3) {
+                        FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion.put(0, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+                    }
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldReadMultipleChoiceUnion;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(unionOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
new file mode 100644
index 000000000..2c7c0756e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541.java
@@ -0,0 +1,129 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapField0;
+    private final Schema mapFieldMapValueSchema0;
+    private final Schema mapFieldValueMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadNestedMap_GenericDeserializer_1870075541_1870075541(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapField0 = readerSchema.getField("mapField").schema();
+        this.mapFieldMapValueSchema0 = mapField0 .getValueType();
+        this.mapFieldValueMapValueSchema0 = mapFieldMapValueSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadNestedMap0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadNestedMap = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Map<Utf8, List<Integer>>> mapField1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Map<Utf8, List<Integer>>> mapFieldReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0);
+                if (oldMap0 instanceof Map) {
+                    mapFieldReuse0 = ((Map) oldMap0);
+                }
+                if (mapFieldReuse0 != (null)) {
+                    mapFieldReuse0 .clear();
+                    mapField1 = mapFieldReuse0;
+                } else {
+                    mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Map<Utf8, List<Integer>> mapFieldValue0 = null;
+                    long chunkLen1 = (decoder.readMapStart());
+                    if (chunkLen1 > 0) {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, ((int) chunkLen1)));
+                        } else {
+                            Map<Utf8, List<Integer>> mapFieldValueReuse0 = null;
+                            if (null instanceof Map) {
+                                mapFieldValueReuse0 = ((Map) null);
+                            }
+                            if (mapFieldValueReuse0 != (null)) {
+                                mapFieldValueReuse0 .clear();
+                                mapFieldValue0 = mapFieldValueReuse0;
+                            } else {
+                                mapFieldValue0 = new HashMap<Utf8, List<Integer>>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                            }
+                        }
+                        do {
+                            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                                Utf8 key1 = (decoder.readString(null));
+                                PrimitiveIntList mapFieldValueValue0 = null;
+                                long chunkLen2 = (decoder.readArrayStart());
+                                if (null instanceof PrimitiveIntList) {
+                                    mapFieldValueValue0 = ((PrimitiveIntList) null);
+                                    mapFieldValueValue0 .clear();
+                                } else {
+                                    mapFieldValueValue0 = new PrimitiveIntArrayList(((int) chunkLen2));
+                                }
+                                while (chunkLen2 > 0) {
+                                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                                        mapFieldValueValue0 .addPrimitive((decoder.readInt()));
+                                    }
+                                    chunkLen2 = (decoder.arrayNext());
+                                }
+                                mapFieldValue0 .put(key1, mapFieldValueValue0);
+                            }
+                            chunkLen1 = (decoder.mapNext());
+                        } while (chunkLen1 > 0);
+                    } else {
+                        if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                            mapFieldValue0 = ((Map)(customization).getNewMapOverrideFunc().apply(null, 0));
+                        } else {
+                            mapFieldValue0 = new HashMap<Utf8, List<Integer>>(0);
+                        }
+                    }
+                    mapField1 .put(key0, mapFieldValue0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapField1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadNestedMap.get(0), 0));
+            } else {
+                mapField1 = new HashMap<Utf8, Map<Utf8, List<Integer>>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadNestedMap.put(0, mapField1);
+        return FastGenericDeserializerGeneratorTest_shouldReadNestedMap;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
new file mode 100644
index 000000000..019ffe444
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208.java
@@ -0,0 +1,214 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+    private final Schema testEnumUnion0;
+    private final Map enumMappingtestEnum1;
+    private final Schema testEnumArray0;
+    private final Map enumMappingtestEnum2;
+    private final Schema testEnumUnionArray0;
+    private final Schema testEnumUnionArrayArrayElemSchema0;
+    private final Map enumMappingtestEnum3;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum_GenericDeserializer_611749105_646016208(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(1));
+        tempEnumMapping0 .put(new Integer(1), new Integer(0));
+        tempEnumMapping0 .put(new Integer(2), new Integer(4));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        this.testEnumUnion0 = readerSchema.getField("testEnumUnion").schema();
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(1));
+        tempEnumMapping1 .put(new Integer(1), new Integer(0));
+        tempEnumMapping1 .put(new Integer(2), new Integer(4));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        this.testEnumArray0 = readerSchema.getField("testEnumArray").schema();
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(1));
+        tempEnumMapping2 .put(new Integer(1), new Integer(0));
+        tempEnumMapping2 .put(new Integer(2), new Integer(4));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        this.testEnumUnionArray0 = readerSchema.getField("testEnumUnionArray").schema();
+        this.testEnumUnionArrayArrayElemSchema0 = testEnumUnionArray0 .getElementType();
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(1));
+        tempEnumMapping3 .put(new Integer(1), new Integer(0));
+        tempEnumMapping3 .put(new Integer(2), new Integer(4));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(3));
+        this.enumMappingtestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(0, enumValue0);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1((FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                GenericEnumSymbol enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingtestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult1)));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex1));
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(1, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex0));
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(2);
+        if (oldArray0 instanceof List) {
+            testEnumArray1 = ((List) oldArray0);
+            if (testEnumArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumArray1).reset();
+            } else {
+                testEnumArray1 .clear();
+            }
+        } else {
+            testEnumArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen0), testEnumArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                GenericEnumSymbol enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingtestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult2)));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray1 .add(enumValue2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(2, testEnumArray1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.get(3);
+        if (oldArray1 instanceof List) {
+            testEnumUnionArray1 = ((List) oldArray1);
+            if (testEnumUnionArray1 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray1).reset();
+            } else {
+                testEnumUnionArray1 .clear();
+            }
+        } else {
+            testEnumUnionArray1 = new org.apache.avro.generic.GenericData.Array<GenericEnumSymbol>(((int) chunkLen1), testEnumUnionArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray1 .add(null);
+                } else {
+                    if (unionIndex1 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        GenericEnumSymbol enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingtestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult3)));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray1 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPermutatedEnum.put(3, testEnumUnionArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
new file mode 100644
index 000000000..f10baffb8
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736.java
@@ -0,0 +1,209 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testIntUnion0;
+    private final Schema testStringUnion0;
+    private final Schema testLongUnion0;
+    private final Schema testDoubleUnion0;
+    private final Schema testFloatUnion0;
+    private final Schema testBooleanUnion0;
+    private final Schema testBytesUnion0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadPrimitives_GenericDeserializer_1966544736_1966544736(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testIntUnion0 = readerSchema.getField("testIntUnion").schema();
+        this.testStringUnion0 = readerSchema.getField("testStringUnion").schema();
+        this.testLongUnion0 = readerSchema.getField("testLongUnion").schema();
+        this.testDoubleUnion0 = readerSchema.getField("testDoubleUnion").schema();
+        this.testFloatUnion0 = readerSchema.getField("testFloatUnion").schema();
+        this.testBooleanUnion0 = readerSchema.getField("testBooleanUnion").schema();
+        this.testBytesUnion0 = readerSchema.getField("testBytesUnion").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadPrimitives0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(0, (decoder.readInt()));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6((FastGenericDeserializerGeneratorTest_shouldReadPrimitives), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadPrimitives;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(2);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(2, charSequence0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(3);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(3, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex1));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(4, (decoder.readLong()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(5, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(6, (decoder.readDouble()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives3(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(7, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(8, (decoder.readFloat()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives4(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(9, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(10, (decoder.readBoolean()));
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives5(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(11, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(12);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(12, byteBuffer0);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadPrimitives6(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadPrimitives, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = FastGenericDeserializerGeneratorTest_shouldReadPrimitives.get(13);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadPrimitives.put(13, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
new file mode 100644
index 000000000..bec0418b0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944.java
@@ -0,0 +1,164 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema intFieldField0;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1274815349_1365753944(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.intFieldField0 = record10 .getField("intField").schema();
+        this.intField0 = record10 .getField("intField").schema();
+        this.subField1 = record10 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        subRecord.put(0, null);
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord1(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            if (recordArray1 instanceof GenericArray) {
+                ((GenericArray) recordArray1).reset();
+            } else {
+                recordArray1 .clear();
+            }
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializesubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                subRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex1));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = subRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
new file mode 100644
index 000000000..71f069f2d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349.java
@@ -0,0 +1,179 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record10;
+    private final Schema subField0;
+    private final Schema record20;
+    private final Schema intField0;
+    private final Schema subField1;
+    private final Schema recordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields_GenericDeserializer_1365753944_1274815349(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record10 = readerSchema.getField("record1").schema();
+        this.subField0 = record10 .getField("subField").schema();
+        this.record20 = readerSchema.getField("record2").schema();
+        this.intField0 = record20 .getField("intField").schema();
+        this.subField1 = record20 .getField("subField").schema();
+        this.recordArray0 = readerSchema.getField("recordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(0, deserializealiasedSubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0((FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields;
+    }
+
+    public IndexedRecord deserializealiasedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record10)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record10);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex0));
+            }
+        }
+        populate_aliasedSubRecord0((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord0(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = aliasedSubRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(1), (decoder), (customization)));
+        List<IndexedRecord> recordArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.get(2);
+        if (oldArray0 instanceof List) {
+            recordArray1 = ((List) oldArray0);
+            if (recordArray1 instanceof GenericArray) {
+                ((GenericArray) recordArray1).reset();
+            } else {
+                recordArray1 .clear();
+            }
+        } else {
+            recordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordArray1 .add(deserializealiasedSubRecord0(recordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSplittedAndAliasedSubRecordFields.put(2, recordArray1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord aliasedSubRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == record20)) {
+            aliasedSubRecord = ((IndexedRecord)(reuse));
+        } else {
+            aliasedSubRecord = new org.apache.avro.generic.GenericData.Record(record20);
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                aliasedSubRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'intField': "+ unionIndex2));
+            }
+        }
+        populate_aliasedSubRecord1((aliasedSubRecord), (customization), (decoder));
+        return aliasedSubRecord;
+    }
+
+    private void populate_aliasedSubRecord1(IndexedRecord aliasedSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            aliasedSubRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = aliasedSubRecord.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                aliasedSubRecord.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
new file mode 100644
index 000000000..9155e9272
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407.java
@@ -0,0 +1,260 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArray0;
+    private final Schema recordsArrayArrayElemSchema0;
+    private final Schema subField0;
+    private final Schema recordsMap0;
+    private final Schema recordsArrayUnion0;
+    private final Schema recordsArrayUnionOptionSchema0;
+    private final Schema recordsArrayUnionOptionArrayElemSchema0;
+    private final Schema recordsMapUnion0;
+    private final Schema recordsMapUnionOptionSchema0;
+    private final Schema recordsMapUnionOptionMapValueSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField_GenericDeserializer_1602399407_1602399407(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArray0 = readerSchema.getField("recordsArray").schema();
+        this.recordsArrayArrayElemSchema0 = recordsArray0 .getElementType();
+        this.subField0 = recordsArrayArrayElemSchema0 .getField("subField").schema();
+        this.recordsMap0 = readerSchema.getField("recordsMap").schema();
+        this.recordsArrayUnion0 = readerSchema.getField("recordsArrayUnion").schema();
+        this.recordsArrayUnionOptionSchema0 = recordsArrayUnion0 .getTypes().get(1);
+        this.recordsArrayUnionOptionArrayElemSchema0 = recordsArrayUnionOptionSchema0 .getElementType();
+        this.recordsMapUnion0 = readerSchema.getField("recordsMapUnion").schema();
+        this.recordsMapUnionOptionSchema0 = recordsMapUnion0 .getTypes().get(1);
+        this.recordsMapUnionOptionMapValueSchema0 = recordsMapUnionOptionSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<IndexedRecord> recordsArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArray1 = ((List) oldArray0);
+            if (recordsArray1 instanceof GenericArray) {
+                ((GenericArray) recordsArray1).reset();
+            } else {
+                recordsArray1 .clear();
+            }
+        } else {
+            recordsArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), recordsArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                recordsArray1 .add(deserializesubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(0, recordsArray1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayArrayElemSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayArrayElemSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex0));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> recordsMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, IndexedRecord> recordsMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap1 = recordsMapReuse0;
+                } else {
+                    recordsMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(1), 0));
+            } else {
+                recordsMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(1, recordsMap1);
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, null);
+        } else {
+            if (unionIndex1 == 1) {
+                List<IndexedRecord> recordsArrayUnionOption0 = null;
+                long chunkLen2 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray1);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen2), recordsArrayUnionOptionSchema0);
+                }
+                while (chunkLen2 > 0) {
+                    for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        int unionIndex2 = (decoder.readIndex());
+                        if (unionIndex2 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex2 == 1) {
+                                recordsArrayUnionOption0 .add(deserializesubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex2));
+                            }
+                        }
+                    }
+                    chunkLen2 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(2, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, null);
+        } else {
+            if (unionIndex3 == 1) {
+                Map<Utf8, IndexedRecord> recordsMapUnionOption0 = null;
+                long chunkLen3 = (decoder.readMapStart());
+                if (chunkLen3 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), ((int) chunkLen3)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex4 = (decoder.readIndex());
+                            if (unionIndex4 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex4 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex4));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.mapNext());
+                    } while (chunkLen3 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordCollectionsField.put(3, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
new file mode 100644
index 000000000..195f2ab8d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481.java
@@ -0,0 +1,394 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordsArrayMap0;
+    private final Schema recordsArrayMapArrayElemSchema0;
+    private final Schema recordsArrayMapElemMapValueSchema0;
+    private final Schema recordsArrayMapElemValueOptionSchema0;
+    private final Schema subField0;
+    private final Schema recordsMapArray0;
+    private final Schema recordsMapArrayMapValueSchema0;
+    private final Schema recordsMapArrayValueArrayElemSchema0;
+    private final Schema recordsArrayMapUnion0;
+    private final Schema recordsArrayMapUnionOptionArrayElemSchema0;
+    private final Schema recordsArrayMapUnionOptionElemMapValueSchema0;
+    private final Schema recordsMapArrayUnion0;
+    private final Schema recordsMapArrayUnionOptionSchema0;
+    private final Schema recordsMapArrayUnionOptionValueArrayElemSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField_GenericDeserializer_624658481_624658481(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordsArrayMap0 = readerSchema.getField("recordsArrayMap").schema();
+        this.recordsArrayMapArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapElemMapValueSchema0 = recordsArrayMapArrayElemSchema0 .getValueType();
+        this.recordsArrayMapElemValueOptionSchema0 = recordsArrayMapElemMapValueSchema0 .getTypes().get(1);
+        this.subField0 = recordsArrayMapElemValueOptionSchema0 .getField("subField").schema();
+        this.recordsMapArray0 = readerSchema.getField("recordsMapArray").schema();
+        this.recordsMapArrayMapValueSchema0 = recordsMapArray0 .getValueType();
+        this.recordsMapArrayValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+        this.recordsArrayMapUnion0 = readerSchema.getField("recordsArrayMapUnion").schema();
+        this.recordsArrayMapUnionOptionArrayElemSchema0 = recordsArrayMap0 .getElementType();
+        this.recordsArrayMapUnionOptionElemMapValueSchema0 = recordsArrayMapUnionOptionArrayElemSchema0 .getValueType();
+        this.recordsMapArrayUnion0 = readerSchema.getField("recordsMapArrayUnion").schema();
+        this.recordsMapArrayUnionOptionSchema0 = recordsMapArrayUnion0 .getTypes().get(1);
+        this.recordsMapArrayUnionOptionValueArrayElemSchema0 = recordsMapArrayMapValueSchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Map<Utf8, IndexedRecord>> recordsArrayMap1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(0);
+        if (oldArray0 instanceof List) {
+            recordsArrayMap1 = ((List) oldArray0);
+            if (recordsArrayMap1 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap1).reset();
+            } else {
+                recordsArrayMap1 .clear();
+            }
+        } else {
+            recordsArrayMap1 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen0), recordsArrayMap0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Map<Utf8, IndexedRecord> recordsArrayMapElem0 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, IndexedRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex0 = (decoder.readIndex());
+                            if (unionIndex0 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key0, null);
+                            } else {
+                                if (unionIndex0 == 1) {
+                                    recordsArrayMapElem0 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex0));
+                                }
+                            }
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                recordsArrayMap1 .add(recordsArrayMapElem0);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(0, recordsArrayMap1);
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1((FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordsArrayMapElemValueOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordsArrayMapElemValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<IndexedRecord>> recordsMapArray1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1);
+                if (oldMap0 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray1 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    List<IndexedRecord> recordsMapArrayValue0 = null;
+                    long chunkLen3 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen3), recordsMapArrayMapValueSchema0);
+                    }
+                    while (chunkLen3 > 0) {
+                        for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex2 = (decoder.readIndex());
+                            if (unionIndex2 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex2 == 1) {
+                                    recordsMapArrayValue0 .add(deserializesubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex2));
+                                }
+                            }
+                        }
+                        chunkLen3 = (decoder.arrayNext());
+                    }
+                    recordsMapArray1 .put(key1, recordsMapArrayValue0);
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(1), 0));
+            } else {
+                recordsMapArray1 = new HashMap<Utf8, List<IndexedRecord>>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(1, recordsMapArray1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                List<Map<Utf8, IndexedRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(2);
+                if (oldArray1 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray1);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new org.apache.avro.generic.GenericData.Array<Map<Utf8, IndexedRecord>>(((int) chunkLen4), recordsArrayMap0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray1 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                        }
+                        Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen5 = (decoder.readMapStart());
+                        if (chunkLen5 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen5)));
+                            } else {
+                                Map<Utf8, IndexedRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                                    Utf8 key2 = (decoder.readString(null));
+                                    int unionIndex4 = (decoder.readIndex());
+                                    if (unionIndex4 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key2, null);
+                                    } else {
+                                        if (unionIndex4 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key2, deserializesubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex4));
+                                        }
+                                    }
+                                }
+                                chunkLen5 = (decoder.mapNext());
+                            } while (chunkLen5 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, IndexedRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(2, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, null);
+        } else {
+            if (unionIndex5 == 1) {
+                Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readMapStart());
+                if (chunkLen6 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), ((int) chunkLen6)));
+                    } else {
+                        Map<Utf8, List<IndexedRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            List<IndexedRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen7 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen7), recordsMapArrayMapValueSchema0);
+                            }
+                            while (chunkLen7 > 0) {
+                                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex6 = (decoder.readIndex());
+                                    if (unionIndex6 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex6 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializesubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex6));
+                                        }
+                                    }
+                                }
+                                chunkLen7 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key3, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen6 = (decoder.mapNext());
+                    } while (chunkLen6 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.get(3), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<IndexedRecord>>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordComplexCollectionsField.put(3, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
new file mode 100644
index 000000000..4c47de119
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema record0;
+    private final Schema recordOptionSchema0;
+    private final Schema subField0;
+    private final Schema field0;
+
+    public FastGenericDeserializerGeneratorTest_shouldReadSubRecordField_GenericDeserializer_1111917046_1111917046(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.record0 = readerSchema.getField("record").schema();
+        this.recordOptionSchema0 = record0 .getTypes().get(1);
+        this.subField0 = recordOptionSchema0 .getField("subField").schema();
+        this.field0 = readerSchema.getField("field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'record': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0((FastGenericDeserializerGeneratorTest_shouldReadSubRecordField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldReadSubRecordField;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(recordOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = subRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex1));
+            }
+        }
+        return subRecord;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldReadSubRecordField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldReadSubRecordField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(1), (decoder), (customization)));
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.get(2);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldReadSubRecordField.put(2, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex2));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
new file mode 100644
index 000000000..a8f3ded33
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696.java
@@ -0,0 +1,256 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testNotRemoved0;
+    private final Schema testNotRemoved20;
+    private final Schema subRecord0;
+    private final Schema subRecordOptionSchema0;
+    private final Schema testNotRemoved1;
+    private final Schema testNotRemoved21;
+    private final Schema subRecordMap0;
+    private final Schema subRecordArray0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedField_GenericDeserializer_1830076637_292632696(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testNotRemoved0 = readerSchema.getField("testNotRemoved").schema();
+        this.testNotRemoved20 = readerSchema.getField("testNotRemoved2").schema();
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordOptionSchema0 = subRecord0 .getTypes().get(1);
+        this.testNotRemoved1 = subRecordOptionSchema0 .getField("testNotRemoved").schema();
+        this.testNotRemoved21 = subRecordOptionSchema0 .getField("testNotRemoved2").schema();
+        this.subRecordMap0 = readerSchema.getField("subRecordMap").schema();
+        this.subRecordArray0 = readerSchema.getField("subRecordArray").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex0));
+            }
+        }
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2((FastGenericDeserializerGeneratorTest_shouldSkipRemovedField), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedField;
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex1));
+            }
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex2));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(2, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(2), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex3));
+            }
+        }
+        Map<Utf8, IndexedRecord> subRecordMap1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> subRecordMapReuse0 = null;
+                Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3);
+                if (oldMap0 instanceof Map) {
+                    subRecordMapReuse0 = ((Map) oldMap0);
+                }
+                if (subRecordMapReuse0 != (null)) {
+                    subRecordMapReuse0 .clear();
+                    subRecordMap1 = subRecordMapReuse0;
+                } else {
+                    subRecordMap1 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    subRecordMap1 .put(key0, deserializesubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                subRecordMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(3), 0));
+            } else {
+                subRecordMap1 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(3, subRecordMap1);
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordOptionSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordOptionSchema0);
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            subRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = subRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                subRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved': "+ unionIndex4));
+            }
+        }
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex5 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testRemoved': "+ unionIndex5));
+            }
+        }
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            subRecord.put(1, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = subRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                subRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testNotRemoved2': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedField2(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedField, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<IndexedRecord> subRecordArray1 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.get(4);
+        if (oldArray0 instanceof List) {
+            subRecordArray1 = ((List) oldArray0);
+            if (subRecordArray1 instanceof GenericArray) {
+                ((GenericArray) subRecordArray1).reset();
+            } else {
+                subRecordArray1 .clear();
+            }
+        } else {
+            subRecordArray1 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen1), subRecordArray0);
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object subRecordArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    subRecordArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                subRecordArray1 .add(deserializesubRecord0(subRecordArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedField.put(4, subRecordArray1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
new file mode 100644
index 000000000..ae243bf74
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord_GenericDeserializer_1090641932_438987109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord.get(0), (decoder), (customization)));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedNestedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        populate_subRecord1((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubSubRecord0(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subSubRecord0((decoder));
+    }
+
+    private void populate_subSubRecord0(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_subRecord1(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
new file mode 100644
index 000000000..8c7c9f8b7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291.java
@@ -0,0 +1,114 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord10;
+
+    public FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord_GenericDeserializer_1932590611_1452595291(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord10 = readerSchema.getField("subRecord1").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(0, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(0), (decoder), (customization)));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1((FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord), (customization), (decoder));
+        return FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord10)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord10);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = subRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        subRecord.put(0, charSequence0);
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Utf8 charSequence1;
+        Object oldString1 = subRecord.get(1);
+        if (oldString1 instanceof Utf8) {
+            charSequence1 = (decoder).readString(((Utf8) oldString1));
+        } else {
+            charSequence1 = (decoder).readString(null);
+        }
+        subRecord.put(1, charSequence1);
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord0(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializesubRecord20(null, (decoder), (customization));
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                deserializesubRecord20(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord3': "+ unionIndex0));
+            }
+        }
+    }
+
+    public void deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+        populate_subRecord20((decoder));
+    }
+
+    private void populate_subRecord20(Decoder decoder)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord1(IndexedRecord FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.put(1, deserializesubRecord0(FastGenericDeserializerGeneratorTest_shouldSkipRemovedRecord.get(1), (decoder), (customization)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
new file mode 100644
index 000000000..33f5bbe55
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
new file mode 100644
index 000000000..affba44e1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918.java
@@ -0,0 +1,60 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_1186244769_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
new file mode 100644
index 000000000..1e3750cc5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_1186244769(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException("Found \"long\", expecting [\"null\", \"string\"]");
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
new file mode 100644
index 000000000..56b68dd25
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType_GenericDeserializer_367446918_367446918(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType.put(0, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateOrFailLikeVanillaAvroWhenTheReaderUnionIsMissingAType;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
new file mode 100644
index 000000000..015cb3698
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
new file mode 100644
index 000000000..8201351b2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_1986844009_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
new file mode 100644
index 000000000..74b8e4040
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_1986844009(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
new file mode 100644
index 000000000..db79467b9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString_GenericDeserializer_611693319_611693319(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    Utf8 charSequence0;
+                    Object oldString0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.get(0);
+                    if (oldString0 instanceof Utf8) {
+                        charSequence0 = (decoder).readString(((Utf8) oldString0));
+                    } else {
+                        charSequence0 = (decoder).readString(null);
+                    }
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString.put(0, charSequence0);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingThatIncludeString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
new file mode 100644
index 000000000..79727d899
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
new file mode 100644
index 000000000..b70dfb97c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_1778260273_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            PrimitiveIntList testOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+            if (oldArray0 instanceof PrimitiveIntList) {
+                testOption0 = ((PrimitiveIntList) oldArray0);
+                testOption0 .clear();
+            } else {
+                testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    testOption0 .addPrimitive((decoder.readInt()));
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
new file mode 100644
index 000000000..9498d278d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_1778260273(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
new file mode 100644
index 000000000..f917f4060
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958.java
@@ -0,0 +1,71 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays_GenericDeserializer_906204958_906204958(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList testOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    testOption0 = ((PrimitiveIntList) oldArray0);
+                    testOption0 .clear();
+                } else {
+                    testOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        testOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithArrays;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
new file mode 100644
index 000000000..2f5da97dc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
new file mode 100644
index 000000000..052f96d1d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_2127585735_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Map<Utf8, Integer> testOption0 = null;
+            long chunkLen0 = (decoder.readMapStart());
+            if (chunkLen0 > 0) {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                } else {
+                    Map<Utf8, Integer> testOptionReuse0 = null;
+                    Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                    if (oldMap0 instanceof Map) {
+                        testOptionReuse0 = ((Map) oldMap0);
+                    }
+                    if (testOptionReuse0 != (null)) {
+                        testOptionReuse0 .clear();
+                        testOption0 = testOptionReuse0;
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                    }
+                }
+                do {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Utf8 key0 = (decoder.readString(null));
+                        testOption0 .put(key0, (decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.mapNext());
+                } while (chunkLen0 > 0);
+            } else {
+                if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                    testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                } else {
+                    testOption0 = new HashMap<Utf8, Integer>(0);
+                }
+            }
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.readNull();
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
new file mode 100644
index 000000000..0b8b2d24f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_2127585735(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
new file mode 100644
index 000000000..65f285d75
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps_GenericDeserializer_539246803_539246803(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> testOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> testOptionReuse0 = null;
+                        Object oldMap0 = FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0);
+                        if (oldMap0 instanceof Map) {
+                            testOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (testOptionReuse0 != (null)) {
+                            testOptionReuse0 .clear();
+                            testOption0 = testOptionReuse0;
+                        } else {
+                            testOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            testOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        testOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.get(0), 0));
+                    } else {
+                        testOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps.put(0, testOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithMaps;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
new file mode 100644
index 000000000..5a8c27b89
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
new file mode 100644
index 000000000..5bb43d8dc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_1284646643_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
new file mode 100644
index 000000000..73ce9109f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_1284646643(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
new file mode 100644
index 000000000..44aaccac1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString_GenericDeserializer_616931169_616931169(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString.put(0, (decoder.readBoolean()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithNonString;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
new file mode 100644
index 000000000..8b82d4942
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(2);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
new file mode 100644
index 000000000..9110d28c1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_524692447_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(1);
+        this.testOptionSchema1 = test0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
new file mode 100644
index 000000000..49a494b2e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_524692447(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(2);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
new file mode 100644
index 000000000..6db440522
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema test0;
+    private final Schema testOptionSchema0;
+    private final Schema testOptionSchema1;
+
+    public FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords_GenericDeserializer_963368136_963368136(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.test0 = readerSchema.getField("test").schema();
+        this.testOptionSchema0 = test0 .getTypes().get(0);
+        this.testOptionSchema1 = test0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = ((IndexedRecord)(reuse));
+        } else {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord20(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, deserializesubRecord10(FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.get(0), (decoder), (customization)));
+            } else {
+                if (unionIndex0 == 2) {
+                    decoder.readNull();
+                    FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords.put(0, null);
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'test': "+ unionIndex0));
+                }
+            }
+        }
+        return FastGenericDeserializerGeneratorTest_shouldTolerateUnionReorderingWithSubRecords;
+    }
+
+    public IndexedRecord deserializesubRecord20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord2;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema0)) {
+            subRecord2 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord2 = new org.apache.avro.generic.GenericData.Record(testOptionSchema0);
+        }
+        subRecord2 .put(0, (decoder.readInt()));
+        return subRecord2;
+    }
+
+    public IndexedRecord deserializesubRecord10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == testOptionSchema1)) {
+            subRecord1 = ((IndexedRecord)(reuse));
+        } else {
+            subRecord1 = new org.apache.avro.generic.GenericData.Record(testOptionSchema1);
+        }
+        subRecord1 .put(0, (decoder.readInt()));
+        return subRecord1;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java
new file mode 100644
index 000000000..57b1189f1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053.java
@@ -0,0 +1,111 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema timeMillisField0;
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema dateField0;
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema arrayOfUnionOfDateAndTimestampMillis0;
+    private final Schema arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0;
+    private final Schema arrayOfUnionOfDateAndTimestampMillisElemOptionSchema0;
+    private final Schema arrayOfUnionOfDateAndTimestampMillisElemOptionSchema1;
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+
+    public FastSerdeLogicalTypesDefined_GenericDeserializer_229156053_229156053(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.timeMillisField0 = readerSchema.getField("timeMillisField").schema();
+        this.dateField0 = readerSchema.getField("dateField").schema();
+        this.arrayOfUnionOfDateAndTimestampMillis0 = readerSchema.getField("arrayOfUnionOfDateAndTimestampMillis").schema();
+        this.arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 = arrayOfUnionOfDateAndTimestampMillis0 .getElementType();
+        this.arrayOfUnionOfDateAndTimestampMillisElemOptionSchema0 = arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 .getTypes().get(0);
+        this.arrayOfUnionOfDateAndTimestampMillisElemOptionSchema1 = arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesDefined0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesDefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastSerdeLogicalTypesDefined;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastSerdeLogicalTypesDefined = ((IndexedRecord)(reuse));
+        } else {
+            FastSerdeLogicalTypesDefined = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+        FastSerdeLogicalTypesDefined.put(0, convertedValue0);
+        populate_FastSerdeLogicalTypesDefined0((FastSerdeLogicalTypesDefined), (customization), (decoder));
+        return FastSerdeLogicalTypesDefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesDefined0(IndexedRecord FastSerdeLogicalTypesDefined, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+        FastSerdeLogicalTypesDefined.put(1, convertedValue1);
+        List<Object> arrayOfUnionOfDateAndTimestampMillis1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastSerdeLogicalTypesDefined.get(2);
+        if (oldArray0 instanceof List) {
+            arrayOfUnionOfDateAndTimestampMillis1 = ((List) oldArray0);
+            if (arrayOfUnionOfDateAndTimestampMillis1 instanceof GenericArray) {
+                ((GenericArray) arrayOfUnionOfDateAndTimestampMillis1).reset();
+            } else {
+                arrayOfUnionOfDateAndTimestampMillis1 .clear();
+            }
+        } else {
+            arrayOfUnionOfDateAndTimestampMillis1 = new org.apache.avro.generic.GenericData.Array<Object>(((int) chunkLen0), arrayOfUnionOfDateAndTimestampMillis0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    LocalDate convertedValue2 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                    arrayOfUnionOfDateAndTimestampMillis1 .add(convertedValue2);
+                } else {
+                    if (unionIndex0 == 1) {
+                        Instant convertedValue3 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                        arrayOfUnionOfDateAndTimestampMillis1 .add(convertedValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayOfUnionOfDateAndTimestampMillisElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesDefined.put(2, arrayOfUnionOfDateAndTimestampMillis1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java
new file mode 100644
index 000000000..31e685ba9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053.java
@@ -0,0 +1,99 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+
+public class FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+
+    public FastSerdeLogicalTypesDefined_SpecificDeserializer_229156053_229156053(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesDefined0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined deserializeFastSerdeLogicalTypesDefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined FastSerdeLogicalTypesDefined;
+        if ((reuse)!= null) {
+            FastSerdeLogicalTypesDefined = ((com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined)(reuse));
+        } else {
+            FastSerdeLogicalTypesDefined = new com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined();
+        }
+        LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+        FastSerdeLogicalTypesDefined.put(0, convertedValue0);
+        populate_FastSerdeLogicalTypesDefined0((FastSerdeLogicalTypesDefined), (customization), (decoder));
+        return FastSerdeLogicalTypesDefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesDefined0(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined FastSerdeLogicalTypesDefined, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+        FastSerdeLogicalTypesDefined.put(1, convertedValue1);
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastSerdeLogicalTypesDefined.get(2);
+        if (oldArray0 instanceof List) {
+            arrayOfUnionOfDateAndTimestampMillis0 = ((List) oldArray0);
+            if (arrayOfUnionOfDateAndTimestampMillis0 instanceof GenericArray) {
+                ((GenericArray) arrayOfUnionOfDateAndTimestampMillis0).reset();
+            } else {
+                arrayOfUnionOfDateAndTimestampMillis0 .clear();
+            }
+        } else {
+            arrayOfUnionOfDateAndTimestampMillis0 = new ArrayList<Object>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    LocalDate convertedValue2 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                    arrayOfUnionOfDateAndTimestampMillis0 .add(convertedValue2);
+                } else {
+                    if (unionIndex0 == 1) {
+                        Instant convertedValue3 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                        arrayOfUnionOfDateAndTimestampMillis0 .add(convertedValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayOfUnionOfDateAndTimestampMillisElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesDefined.put(2, arrayOfUnionOfDateAndTimestampMillis0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java
new file mode 100644
index 000000000..815880a19
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890.java
@@ -0,0 +1,437 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema unionOfArrayAndMap0;
+    private final Schema unionOfArrayAndMapOptionSchema0;
+    private final Schema unionOfArrayAndMapOptionArrayElemSchema0;
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema unionOfArrayAndMapOptionSchema1;
+    private final Schema unionOfArrayAndMapOptionMapValueSchema0;
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema mapOfUnionsOfDateAndTimestampMillis0;
+    private final Schema mapOfUnionsOfDateAndTimestampMillisMapValueSchema0;
+    private final Schema mapOfUnionsOfDateAndTimestampMillisValueOptionSchema0;
+    private final Schema mapOfUnionsOfDateAndTimestampMillisValueOptionSchema1;
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+    private final Schema timestampMillisMap0;
+    private final Schema timestampMillisMapMapValueSchema0;
+    private final Schema nullableArrayOfDates0;
+    private final Schema nullableArrayOfDatesOptionSchema0;
+    private final Schema nullableArrayOfDatesOptionArrayElemSchema0;
+    private final Schema arrayOfDatesArrayElemSchema0;
+    private final Schema unionOfDecimalOrDate0;
+    private final Schema unionOfDecimalOrDateOptionSchema0;
+    private final Schema logicalTypeSchema_120893213 = Schema.parse("{\"type\":\"bytes\",\"logicalType\":\"decimal\",\"precision\":4,\"scale\":2}");
+    private final Schema unionOfDecimalOrDateOptionSchema1;
+    private final Schema timestampMillisField0;
+    private final Schema timestampMicrosField0;
+    private final Schema logicalTypeSchema__1252781617 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-micros\"}");
+    private final Schema timeMillisField0;
+    private final Schema timeMicrosField0;
+    private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
+    private final Schema dateField0;
+    private final Schema nestedLocalTimestampMillis0;
+    private final Schema nullableNestedTimestamp0;
+    private final Schema nullableUnionOfDateAndLocalTimestamp0;
+    private final Schema nullableUnionOfDateAndLocalTimestampOptionSchema0;
+    private final Schema unionOfDateAndLocalTimestamp0;
+    private final Schema unionOfDateAndLocalTimestampOptionSchema0;
+
+    public FastSerdeLogicalTypesTest1_GenericDeserializer_1007574890_1007574890(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOfArrayAndMap0 = readerSchema.getField("unionOfArrayAndMap").schema();
+        this.unionOfArrayAndMapOptionSchema0 = unionOfArrayAndMap0 .getTypes().get(0);
+        this.unionOfArrayAndMapOptionArrayElemSchema0 = unionOfArrayAndMapOptionSchema0 .getElementType();
+        this.unionOfArrayAndMapOptionSchema1 = unionOfArrayAndMap0 .getTypes().get(1);
+        this.unionOfArrayAndMapOptionMapValueSchema0 = unionOfArrayAndMapOptionSchema1 .getValueType();
+        this.mapOfUnionsOfDateAndTimestampMillis0 = readerSchema.getField("mapOfUnionsOfDateAndTimestampMillis").schema();
+        this.mapOfUnionsOfDateAndTimestampMillisMapValueSchema0 = mapOfUnionsOfDateAndTimestampMillis0 .getValueType();
+        this.mapOfUnionsOfDateAndTimestampMillisValueOptionSchema0 = mapOfUnionsOfDateAndTimestampMillisMapValueSchema0 .getTypes().get(0);
+        this.mapOfUnionsOfDateAndTimestampMillisValueOptionSchema1 = mapOfUnionsOfDateAndTimestampMillisMapValueSchema0 .getTypes().get(1);
+        this.timestampMillisMap0 = readerSchema.getField("timestampMillisMap").schema();
+        this.timestampMillisMapMapValueSchema0 = timestampMillisMap0 .getValueType();
+        this.nullableArrayOfDates0 = readerSchema.getField("nullableArrayOfDates").schema();
+        this.nullableArrayOfDatesOptionSchema0 = nullableArrayOfDates0 .getTypes().get(1);
+        this.nullableArrayOfDatesOptionArrayElemSchema0 = nullableArrayOfDatesOptionSchema0 .getElementType();
+        this.arrayOfDatesArrayElemSchema0 = nullableArrayOfDatesOptionSchema0 .getElementType();
+        this.unionOfDecimalOrDate0 = readerSchema.getField("unionOfDecimalOrDate").schema();
+        this.unionOfDecimalOrDateOptionSchema0 = unionOfDecimalOrDate0 .getTypes().get(0);
+        this.unionOfDecimalOrDateOptionSchema1 = unionOfDecimalOrDate0 .getTypes().get(1);
+        this.timestampMillisField0 = readerSchema.getField("timestampMillisField").schema();
+        this.timestampMicrosField0 = readerSchema.getField("timestampMicrosField").schema();
+        this.timeMillisField0 = readerSchema.getField("timeMillisField").schema();
+        this.timeMicrosField0 = readerSchema.getField("timeMicrosField").schema();
+        this.dateField0 = readerSchema.getField("dateField").schema();
+        this.nestedLocalTimestampMillis0 = readerSchema.getField("nestedLocalTimestampMillis").schema();
+        this.nullableNestedTimestamp0 = nestedLocalTimestampMillis0 .getField("nullableNestedTimestamp").schema();
+        this.nullableUnionOfDateAndLocalTimestamp0 = nestedLocalTimestampMillis0 .getField("nullableUnionOfDateAndLocalTimestamp").schema();
+        this.nullableUnionOfDateAndLocalTimestampOptionSchema0 = nullableUnionOfDateAndLocalTimestamp0 .getTypes().get(1);
+        this.unionOfDateAndLocalTimestamp0 = nestedLocalTimestampMillis0 .getField("unionOfDateAndLocalTimestamp").schema();
+        this.unionOfDateAndLocalTimestampOptionSchema0 = unionOfDateAndLocalTimestamp0 .getTypes().get(0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesTest10((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastSerdeLogicalTypesTest1;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastSerdeLogicalTypesTest1 = ((IndexedRecord)(reuse));
+        } else {
+            FastSerdeLogicalTypesTest1 = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            List<LocalTime> unionOfArrayAndMapOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastSerdeLogicalTypesTest1 .get(0);
+            if (oldArray0 instanceof List) {
+                unionOfArrayAndMapOption0 = ((List) oldArray0);
+                unionOfArrayAndMapOption0 .clear();
+            } else {
+                unionOfArrayAndMapOption0 = new org.apache.avro.generic.GenericData.Array<LocalTime>(((int) chunkLen0), unionOfArrayAndMapOptionSchema0);
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+                    unionOfArrayAndMapOption0 .add(convertedValue0);
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, LocalDate> unionOfArrayAndMapOption1 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, LocalDate> unionOfArrayAndMapOptionReuse0 = null;
+                        Object oldMap0 = FastSerdeLogicalTypesTest1 .get(0);
+                        if (oldMap0 instanceof Map) {
+                            unionOfArrayAndMapOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (unionOfArrayAndMapOptionReuse0 != (null)) {
+                            unionOfArrayAndMapOptionReuse0 .clear();
+                            unionOfArrayAndMapOption1 = unionOfArrayAndMapOptionReuse0;
+                        } else {
+                            unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                            unionOfArrayAndMapOption1 .put(key0, convertedValue1);
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), 0));
+                    } else {
+                        unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(0);
+                    }
+                }
+                FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfArrayAndMap': "+ unionIndex0));
+            }
+        }
+        populate_FastSerdeLogicalTypesTest10((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest11((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest12((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest13((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest14((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest15((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        return FastSerdeLogicalTypesTest1;
+    }
+
+    private void populate_FastSerdeLogicalTypesTest10(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillis1 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillisReuse0 = null;
+                Object oldMap1 = FastSerdeLogicalTypesTest1 .get(1);
+                if (oldMap1 instanceof Map) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 = ((Map) oldMap1);
+                }
+                if (mapOfUnionsOfDateAndTimestampMillisReuse0 != (null)) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 .clear();
+                    mapOfUnionsOfDateAndTimestampMillis1 = mapOfUnionsOfDateAndTimestampMillisReuse0;
+                } else {
+                    mapOfUnionsOfDateAndTimestampMillis1 = new HashMap<Utf8, Object>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex1 = (decoder.readIndex());
+                    if (unionIndex1 == 0) {
+                        LocalDate convertedValue2 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                        mapOfUnionsOfDateAndTimestampMillis1 .put(key1, convertedValue2);
+                    } else {
+                        if (unionIndex1 == 1) {
+                            Instant convertedValue3 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                            mapOfUnionsOfDateAndTimestampMillis1 .put(key1, convertedValue3);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapOfUnionsOfDateAndTimestampMillisValue': "+ unionIndex1));
+                        }
+                    }
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), 0));
+            } else {
+                mapOfUnionsOfDateAndTimestampMillis1 = new HashMap<Utf8, Object>(0);
+            }
+        }
+        FastSerdeLogicalTypesTest1 .put(1, mapOfUnionsOfDateAndTimestampMillis1);
+        Map<Utf8, Instant> timestampMillisMap1 = null;
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), ((int) chunkLen3)));
+            } else {
+                Map<Utf8, Instant> timestampMillisMapReuse0 = null;
+                Object oldMap2 = FastSerdeLogicalTypesTest1 .get(2);
+                if (oldMap2 instanceof Map) {
+                    timestampMillisMapReuse0 = ((Map) oldMap2);
+                }
+                if (timestampMillisMapReuse0 != (null)) {
+                    timestampMillisMapReuse0 .clear();
+                    timestampMillisMap1 = timestampMillisMapReuse0;
+                } else {
+                    timestampMillisMap1 = new HashMap<Utf8, Instant>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    Instant convertedValue4 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                    timestampMillisMap1 .put(key2, convertedValue4);
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), 0));
+            } else {
+                timestampMillisMap1 = new HashMap<Utf8, Instant>(0);
+            }
+        }
+        FastSerdeLogicalTypesTest1 .put(2, timestampMillisMap1);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest11(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastSerdeLogicalTypesTest1 .put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                List<LocalDate> nullableArrayOfDatesOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastSerdeLogicalTypesTest1 .get(3);
+                if (oldArray1 instanceof List) {
+                    nullableArrayOfDatesOption0 = ((List) oldArray1);
+                    nullableArrayOfDatesOption0 .clear();
+                } else {
+                    nullableArrayOfDatesOption0 = new org.apache.avro.generic.GenericData.Array<LocalDate>(((int) chunkLen4), nullableArrayOfDatesOptionSchema0);
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        LocalDate convertedValue5 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                        nullableArrayOfDatesOption0 .add(convertedValue5);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastSerdeLogicalTypesTest1 .put(3, nullableArrayOfDatesOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'nullableArrayOfDates': "+ unionIndex2));
+            }
+        }
+        List<LocalDate> arrayOfDates0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray2 = FastSerdeLogicalTypesTest1 .get(4);
+        if (oldArray2 instanceof List) {
+            arrayOfDates0 = ((List) oldArray2);
+            arrayOfDates0 .clear();
+        } else {
+            arrayOfDates0 = new org.apache.avro.generic.GenericData.Array<LocalDate>(((int) chunkLen5), nullableArrayOfDatesOptionSchema0);
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                LocalDate convertedValue6 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                arrayOfDates0 .add(convertedValue6);
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesTest1 .put(4, arrayOfDates0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest12(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            ByteBuffer byteBuffer0;
+            Object oldBytes0 = FastSerdeLogicalTypesTest1 .get(5);
+            if (oldBytes0 instanceof ByteBuffer) {
+                byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+            } else {
+                byteBuffer0 = (decoder).readBytes((null));
+            }
+            BigDecimal convertedValue7 = ((BigDecimal) Conversions.convertToLogicalType(byteBuffer0, this.logicalTypeSchema_120893213, this.logicalTypeSchema_120893213 .getLogicalType(), this.conversion_decimal));
+            FastSerdeLogicalTypesTest1 .put(5, convertedValue7);
+        } else {
+            if (unionIndex3 == 1) {
+                LocalDate convertedValue8 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                FastSerdeLogicalTypesTest1 .put(5, convertedValue8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfDecimalOrDate': "+ unionIndex3));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastSerdeLogicalTypesTest1 .get(6);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastSerdeLogicalTypesTest1 .put(6, charSequence0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest13(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Instant convertedValue9 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+        FastSerdeLogicalTypesTest1 .put(7, convertedValue9);
+        Instant convertedValue10 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__1252781617, this.logicalTypeSchema__1252781617 .getLogicalType(), this.conversion_timestamp_micros));
+        FastSerdeLogicalTypesTest1 .put(8, convertedValue10);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest14(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalTime convertedValue11 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+        FastSerdeLogicalTypesTest1 .put(9, convertedValue11);
+        LocalTime convertedValue12 = ((LocalTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__1515894331, this.logicalTypeSchema__1515894331 .getLogicalType(), this.conversion_time_micros));
+        FastSerdeLogicalTypesTest1 .put(10, convertedValue12);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest15(IndexedRecord FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalDate convertedValue13 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+        FastSerdeLogicalTypesTest1 .put(11, convertedValue13);
+        FastSerdeLogicalTypesTest1 .put(12, deserializeLocalTimestampRecord0(FastSerdeLogicalTypesTest1 .get(12), (decoder), (customization)));
+    }
+
+    public IndexedRecord deserializeLocalTimestampRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord LocalTimestampRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == nestedLocalTimestampMillis0)) {
+            LocalTimestampRecord = ((IndexedRecord)(reuse));
+        } else {
+            LocalTimestampRecord = new org.apache.avro.generic.GenericData.Record(nestedLocalTimestampMillis0);
+        }
+        LocalTimestampRecord.put(0, (decoder.readLong()));
+        populate_LocalTimestampRecord0((LocalTimestampRecord), (customization), (decoder));
+        populate_LocalTimestampRecord1((LocalTimestampRecord), (customization), (decoder));
+        return LocalTimestampRecord;
+    }
+
+    private void populate_LocalTimestampRecord0(IndexedRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            LocalTimestampRecord.put(1, null);
+        } else {
+            if (unionIndex4 == 1) {
+                LocalTimestampRecord.put(1, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'nullableNestedTimestamp': "+ unionIndex4));
+            }
+        }
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            LocalTimestampRecord.put(2, null);
+        } else {
+            if (unionIndex5 == 1) {
+                LocalDate convertedValue14 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                LocalTimestampRecord.put(2, convertedValue14);
+            } else {
+                if (unionIndex5 == 2) {
+                    LocalTimestampRecord.put(2, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullableUnionOfDateAndLocalTimestamp': "+ unionIndex5));
+                }
+            }
+        }
+    }
+
+    private void populate_LocalTimestampRecord1(IndexedRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            LocalDate convertedValue15 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+            LocalTimestampRecord.put(3, convertedValue15);
+        } else {
+            if (unionIndex6 == 1) {
+                LocalTimestampRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfDateAndLocalTimestamp': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java
new file mode 100644
index 000000000..f50aeb333
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890.java
@@ -0,0 +1,379 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+    private final Schema logicalTypeSchema_120893213 = Schema.parse("{\"type\":\"bytes\",\"logicalType\":\"decimal\",\"precision\":4,\"scale\":2}");
+    private final Schema logicalTypeSchema__1252781617 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-micros\"}");
+    private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
+
+    public FastSerdeLogicalTypesTest1_SpecificDeserializer_1007574890_1007574890(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 deserializeFastSerdeLogicalTypesTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1;
+        if ((reuse)!= null) {
+            FastSerdeLogicalTypesTest1 = ((com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1)(reuse));
+        } else {
+            FastSerdeLogicalTypesTest1 = new com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            List<LocalTime> unionOfArrayAndMapOption0 = null;
+            long chunkLen0 = (decoder.readArrayStart());
+            Object oldArray0 = FastSerdeLogicalTypesTest1 .get(0);
+            if (oldArray0 instanceof List) {
+                unionOfArrayAndMapOption0 = ((List) oldArray0);
+                unionOfArrayAndMapOption0 .clear();
+            } else {
+                unionOfArrayAndMapOption0 = new ArrayList<LocalTime>(((int) chunkLen0));
+            }
+            while (chunkLen0 > 0) {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    LocalTime convertedValue0 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+                    unionOfArrayAndMapOption0 .add(convertedValue0);
+                }
+                chunkLen0 = (decoder.arrayNext());
+            }
+            FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption0);
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, LocalDate> unionOfArrayAndMapOption1 = null;
+                long chunkLen1 = (decoder.readMapStart());
+                if (chunkLen1 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), ((int) chunkLen1)));
+                    } else {
+                        Map<Utf8, LocalDate> unionOfArrayAndMapOptionReuse0 = null;
+                        Object oldMap0 = FastSerdeLogicalTypesTest1 .get(0);
+                        if (oldMap0 instanceof Map) {
+                            unionOfArrayAndMapOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (unionOfArrayAndMapOptionReuse0 != (null)) {
+                            unionOfArrayAndMapOptionReuse0 .clear();
+                            unionOfArrayAndMapOption1 = unionOfArrayAndMapOptionReuse0;
+                        } else {
+                            unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            LocalDate convertedValue1 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                            unionOfArrayAndMapOption1 .put(key0, convertedValue1);
+                        }
+                        chunkLen1 = (decoder.mapNext());
+                    } while (chunkLen1 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOfArrayAndMapOption1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(0), 0));
+                    } else {
+                        unionOfArrayAndMapOption1 = new HashMap<Utf8, LocalDate>(0);
+                    }
+                }
+                FastSerdeLogicalTypesTest1 .put(0, unionOfArrayAndMapOption1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfArrayAndMap': "+ unionIndex0));
+            }
+        }
+        populate_FastSerdeLogicalTypesTest10((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest11((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest12((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest13((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest14((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        populate_FastSerdeLogicalTypesTest15((FastSerdeLogicalTypesTest1), (customization), (decoder));
+        return FastSerdeLogicalTypesTest1;
+    }
+
+    private void populate_FastSerdeLogicalTypesTest10(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillis0 = null;
+        long chunkLen2 = (decoder.readMapStart());
+        if (chunkLen2 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), ((int) chunkLen2)));
+            } else {
+                Map<Utf8, Object> mapOfUnionsOfDateAndTimestampMillisReuse0 = null;
+                Object oldMap1 = FastSerdeLogicalTypesTest1 .get(1);
+                if (oldMap1 instanceof Map) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 = ((Map) oldMap1);
+                }
+                if (mapOfUnionsOfDateAndTimestampMillisReuse0 != (null)) {
+                    mapOfUnionsOfDateAndTimestampMillisReuse0 .clear();
+                    mapOfUnionsOfDateAndTimestampMillis0 = mapOfUnionsOfDateAndTimestampMillisReuse0;
+                } else {
+                    mapOfUnionsOfDateAndTimestampMillis0 = new HashMap<Utf8, Object>(((int)(((chunkLen2 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex1 = (decoder.readIndex());
+                    if (unionIndex1 == 0) {
+                        LocalDate convertedValue2 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                        mapOfUnionsOfDateAndTimestampMillis0 .put(key1, convertedValue2);
+                    } else {
+                        if (unionIndex1 == 1) {
+                            Instant convertedValue3 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                            mapOfUnionsOfDateAndTimestampMillis0 .put(key1, convertedValue3);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapOfUnionsOfDateAndTimestampMillisValue': "+ unionIndex1));
+                        }
+                    }
+                }
+                chunkLen2 = (decoder.mapNext());
+            } while (chunkLen2 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                mapOfUnionsOfDateAndTimestampMillis0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(1), 0));
+            } else {
+                mapOfUnionsOfDateAndTimestampMillis0 = new HashMap<Utf8, Object>(0);
+            }
+        }
+        FastSerdeLogicalTypesTest1 .put(1, mapOfUnionsOfDateAndTimestampMillis0);
+        Map<Utf8, Instant> timestampMillisMap0 = null;
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), ((int) chunkLen3)));
+            } else {
+                Map<Utf8, Instant> timestampMillisMapReuse0 = null;
+                Object oldMap2 = FastSerdeLogicalTypesTest1 .get(2);
+                if (oldMap2 instanceof Map) {
+                    timestampMillisMapReuse0 = ((Map) oldMap2);
+                }
+                if (timestampMillisMapReuse0 != (null)) {
+                    timestampMillisMapReuse0 .clear();
+                    timestampMillisMap0 = timestampMillisMapReuse0;
+                } else {
+                    timestampMillisMap0 = new HashMap<Utf8, Instant>(((int)(((chunkLen3 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    Instant convertedValue4 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+                    timestampMillisMap0 .put(key2, convertedValue4);
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                timestampMillisMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(FastSerdeLogicalTypesTest1 .get(2), 0));
+            } else {
+                timestampMillisMap0 = new HashMap<Utf8, Instant>(0);
+            }
+        }
+        FastSerdeLogicalTypesTest1 .put(2, timestampMillisMap0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest11(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FastSerdeLogicalTypesTest1 .put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                List<LocalDate> nullableArrayOfDatesOption0 = null;
+                long chunkLen4 = (decoder.readArrayStart());
+                Object oldArray1 = FastSerdeLogicalTypesTest1 .get(3);
+                if (oldArray1 instanceof List) {
+                    nullableArrayOfDatesOption0 = ((List) oldArray1);
+                    nullableArrayOfDatesOption0 .clear();
+                } else {
+                    nullableArrayOfDatesOption0 = new ArrayList<LocalDate>(((int) chunkLen4));
+                }
+                while (chunkLen4 > 0) {
+                    for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                        LocalDate convertedValue5 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                        nullableArrayOfDatesOption0 .add(convertedValue5);
+                    }
+                    chunkLen4 = (decoder.arrayNext());
+                }
+                FastSerdeLogicalTypesTest1 .put(3, nullableArrayOfDatesOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'nullableArrayOfDates': "+ unionIndex2));
+            }
+        }
+        List<LocalDate> arrayOfDates0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray2 = FastSerdeLogicalTypesTest1 .get(4);
+        if (oldArray2 instanceof List) {
+            arrayOfDates0 = ((List) oldArray2);
+            arrayOfDates0 .clear();
+        } else {
+            arrayOfDates0 = new ArrayList<LocalDate>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                LocalDate convertedValue6 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                arrayOfDates0 .add(convertedValue6);
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesTest1 .put(4, arrayOfDates0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest12(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            ByteBuffer byteBuffer0;
+            Object oldBytes0 = FastSerdeLogicalTypesTest1 .get(5);
+            if (oldBytes0 instanceof ByteBuffer) {
+                byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+            } else {
+                byteBuffer0 = (decoder).readBytes((null));
+            }
+            BigDecimal convertedValue7 = ((BigDecimal) Conversions.convertToLogicalType(byteBuffer0, this.logicalTypeSchema_120893213, this.logicalTypeSchema_120893213 .getLogicalType(), this.conversion_decimal));
+            FastSerdeLogicalTypesTest1 .put(5, convertedValue7);
+        } else {
+            if (unionIndex3 == 1) {
+                LocalDate convertedValue8 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                FastSerdeLogicalTypesTest1 .put(5, convertedValue8);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfDecimalOrDate': "+ unionIndex3));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastSerdeLogicalTypesTest1 .get(6);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastSerdeLogicalTypesTest1 .put(6, charSequence0);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest13(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Instant convertedValue9 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis));
+        FastSerdeLogicalTypesTest1 .put(7, convertedValue9);
+        Instant convertedValue10 = ((Instant) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__1252781617, this.logicalTypeSchema__1252781617 .getLogicalType(), this.conversion_timestamp_micros));
+        FastSerdeLogicalTypesTest1 .put(8, convertedValue10);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest14(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalTime convertedValue11 = ((LocalTime) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis));
+        FastSerdeLogicalTypesTest1 .put(9, convertedValue11);
+        LocalTime convertedValue12 = ((LocalTime) Conversions.convertToLogicalType((decoder.readLong()), this.logicalTypeSchema__1515894331, this.logicalTypeSchema__1515894331 .getLogicalType(), this.conversion_time_micros));
+        FastSerdeLogicalTypesTest1 .put(10, convertedValue12);
+    }
+
+    private void populate_FastSerdeLogicalTypesTest15(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1 FastSerdeLogicalTypesTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        LocalDate convertedValue13 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+        FastSerdeLogicalTypesTest1 .put(11, convertedValue13);
+        FastSerdeLogicalTypesTest1 .put(12, deserializeLocalTimestampRecord0(FastSerdeLogicalTypesTest1 .get(12), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord deserializeLocalTimestampRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord;
+        if ((reuse)!= null) {
+            LocalTimestampRecord = ((com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord)(reuse));
+        } else {
+            LocalTimestampRecord = new com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord();
+        }
+        LocalTimestampRecord.put(0, (decoder.readLong()));
+        populate_LocalTimestampRecord0((LocalTimestampRecord), (customization), (decoder));
+        populate_LocalTimestampRecord1((LocalTimestampRecord), (customization), (decoder));
+        return LocalTimestampRecord;
+    }
+
+    private void populate_LocalTimestampRecord0(com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            LocalTimestampRecord.put(1, null);
+        } else {
+            if (unionIndex4 == 1) {
+                LocalTimestampRecord.put(1, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'nullableNestedTimestamp': "+ unionIndex4));
+            }
+        }
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            LocalTimestampRecord.put(2, null);
+        } else {
+            if (unionIndex5 == 1) {
+                LocalDate convertedValue14 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+                LocalTimestampRecord.put(2, convertedValue14);
+            } else {
+                if (unionIndex5 == 2) {
+                    LocalTimestampRecord.put(2, (decoder.readLong()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullableUnionOfDateAndLocalTimestamp': "+ unionIndex5));
+                }
+            }
+        }
+    }
+
+    private void populate_LocalTimestampRecord1(com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord LocalTimestampRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            LocalDate convertedValue15 = ((LocalDate) Conversions.convertToLogicalType((decoder.readInt()), this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date));
+            LocalTimestampRecord.put(3, convertedValue15);
+        } else {
+            if (unionIndex6 == 1) {
+                LocalTimestampRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionOfDateAndLocalTimestamp': "+ unionIndex6));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java
new file mode 100644
index 000000000..1a3e42d70
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418.java
@@ -0,0 +1,89 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.Conversions.DecimalConversion conversion_decimal = new org.apache.avro.Conversions.DecimalConversion();
+    private final Schema arrayOfUnionOfDateAndTimestampMillis0;
+    private final Schema arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0;
+
+    public FastSerdeLogicalTypesUndefined_GenericDeserializer_1982763418_1982763418(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayOfUnionOfDateAndTimestampMillis0 = readerSchema.getField("arrayOfUnionOfDateAndTimestampMillis").schema();
+        this.arrayOfUnionOfDateAndTimestampMillisArrayElemSchema0 = arrayOfUnionOfDateAndTimestampMillis0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesUndefined0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastSerdeLogicalTypesUndefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastSerdeLogicalTypesUndefined;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastSerdeLogicalTypesUndefined = ((IndexedRecord)(reuse));
+        } else {
+            FastSerdeLogicalTypesUndefined = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        FastSerdeLogicalTypesUndefined.put(0, (decoder.readInt()));
+        populate_FastSerdeLogicalTypesUndefined0((FastSerdeLogicalTypesUndefined), (customization), (decoder));
+        return FastSerdeLogicalTypesUndefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesUndefined0(IndexedRecord FastSerdeLogicalTypesUndefined, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastSerdeLogicalTypesUndefined.put(1, (decoder.readInt()));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastSerdeLogicalTypesUndefined.get(2);
+        if (oldArray0 instanceof List) {
+            arrayOfUnionOfDateAndTimestampMillis1 = ((List) oldArray0);
+            if (arrayOfUnionOfDateAndTimestampMillis1 instanceof GenericArray) {
+                ((GenericArray) arrayOfUnionOfDateAndTimestampMillis1).reset();
+            } else {
+                arrayOfUnionOfDateAndTimestampMillis1 .clear();
+            }
+        } else {
+            arrayOfUnionOfDateAndTimestampMillis1 = new org.apache.avro.generic.GenericData.Array<Object>(((int) chunkLen0), arrayOfUnionOfDateAndTimestampMillis0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    arrayOfUnionOfDateAndTimestampMillis1 .add((decoder.readInt()));
+                } else {
+                    if (unionIndex0 == 1) {
+                        arrayOfUnionOfDateAndTimestampMillis1 .add((decoder.readLong()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayOfUnionOfDateAndTimestampMillisElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesUndefined.put(2, arrayOfUnionOfDateAndTimestampMillis1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java
new file mode 100644
index 000000000..a8976ee3a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418.java
@@ -0,0 +1,85 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+
+public class FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined>
+{
+
+    private final Schema readerSchema;
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.Conversions.DecimalConversion conversion_decimal = new org.apache.avro.Conversions.DecimalConversion();
+
+    public FastSerdeLogicalTypesUndefined_SpecificDeserializer_1982763418_1982763418(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined deserialize(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastSerdeLogicalTypesUndefined0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined deserializeFastSerdeLogicalTypesUndefined0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined FastSerdeLogicalTypesUndefined;
+        if ((reuse)!= null) {
+            FastSerdeLogicalTypesUndefined = ((com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined)(reuse));
+        } else {
+            FastSerdeLogicalTypesUndefined = new com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined();
+        }
+        FastSerdeLogicalTypesUndefined.put(0, (decoder.readInt()));
+        populate_FastSerdeLogicalTypesUndefined0((FastSerdeLogicalTypesUndefined), (customization), (decoder));
+        return FastSerdeLogicalTypesUndefined;
+    }
+
+    private void populate_FastSerdeLogicalTypesUndefined0(com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined FastSerdeLogicalTypesUndefined, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        FastSerdeLogicalTypesUndefined.put(1, (decoder.readInt()));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastSerdeLogicalTypesUndefined.get(2);
+        if (oldArray0 instanceof List) {
+            arrayOfUnionOfDateAndTimestampMillis0 = ((List) oldArray0);
+            if (arrayOfUnionOfDateAndTimestampMillis0 instanceof GenericArray) {
+                ((GenericArray) arrayOfUnionOfDateAndTimestampMillis0).reset();
+            } else {
+                arrayOfUnionOfDateAndTimestampMillis0 .clear();
+            }
+        } else {
+            arrayOfUnionOfDateAndTimestampMillis0 = new ArrayList<Object>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    arrayOfUnionOfDateAndTimestampMillisArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                int unionIndex0 = (decoder.readIndex());
+                if (unionIndex0 == 0) {
+                    arrayOfUnionOfDateAndTimestampMillis0 .add((decoder.readInt()));
+                } else {
+                    if (unionIndex0 == 1) {
+                        arrayOfUnionOfDateAndTimestampMillis0 .add((decoder.readLong()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'arrayOfUnionOfDateAndTimestampMillisElem': "+ unionIndex0));
+                    }
+                }
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastSerdeLogicalTypesUndefined.put(2, arrayOfUnionOfDateAndTimestampMillis0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
new file mode 100644
index 000000000..89336899b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569.java
@@ -0,0 +1,152 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_205569(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(1);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<Utf8> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            if (testStringArray1 instanceof GenericArray) {
+                ((GenericArray) testStringArray1).reset();
+            } else {
+                testStringArray1 .clear();
+            }
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<Utf8>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                Utf8 charSequence2;
+                if (testStringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) testStringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, Utf8> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<Utf8, Utf8> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence3 = (decoder).readString(null);
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
new file mode 100644
index 000000000..ad1a924d2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558.java
@@ -0,0 +1,134 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericDeserializer_205569_941602558(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyInReaderSchemaTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1((FastStringableTest_javaStringPropertyInReaderSchemaTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyInReaderSchemaTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyInReaderSchemaTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            if (testStringArray1 instanceof GenericArray) {
+                ((GenericArray) testStringArray1).reset();
+            } else {
+                testStringArray1 .clear();
+            }
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord FastStringableTest_javaStringPropertyInReaderSchemaTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyInReaderSchemaTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyInReaderSchemaTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
new file mode 100644
index 000000000..4086e7fbc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985.java
@@ -0,0 +1,134 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testUnionString0;
+    private final Schema testStringArray0;
+    private final Schema testStringMap0;
+
+    public FastStringableTest_javaStringPropertyTest_GenericDeserializer_1110978985_1110978985(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testUnionString0 = readerSchema.getField("testUnionString").schema();
+        this.testStringArray0 = readerSchema.getField("testStringArray").schema();
+        this.testStringMap0 = readerSchema.getField("testStringMap").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeFastStringableTest_javaStringPropertyTest0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeFastStringableTest_javaStringPropertyTest0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord FastStringableTest_javaStringPropertyTest;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            FastStringableTest_javaStringPropertyTest = ((IndexedRecord)(reuse));
+        } else {
+            FastStringableTest_javaStringPropertyTest = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        String charSequence0 = (decoder).readString();
+        FastStringableTest_javaStringPropertyTest.put(0, charSequence0);
+        populate_FastStringableTest_javaStringPropertyTest0((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        populate_FastStringableTest_javaStringPropertyTest1((FastStringableTest_javaStringPropertyTest), (customization), (decoder));
+        return FastStringableTest_javaStringPropertyTest;
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest0(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FastStringableTest_javaStringPropertyTest.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                String charSequence1 = (decoder).readString();
+                FastStringableTest_javaStringPropertyTest.put(1, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testUnionString': "+ unionIndex0));
+            }
+        }
+        List<String> testStringArray1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = FastStringableTest_javaStringPropertyTest.get(2);
+        if (oldArray0 instanceof List) {
+            testStringArray1 = ((List) oldArray0);
+            if (testStringArray1 instanceof GenericArray) {
+                ((GenericArray) testStringArray1).reset();
+            } else {
+                testStringArray1 .clear();
+            }
+        } else {
+            testStringArray1 = new org.apache.avro.generic.GenericData.Array<String>(((int) chunkLen0), testStringArray0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testStringArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testStringArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                String charSequence2 = (decoder).readString();
+                testStringArray1 .add(charSequence2);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        FastStringableTest_javaStringPropertyTest.put(2, testStringArray1);
+    }
+
+    private void populate_FastStringableTest_javaStringPropertyTest1(IndexedRecord FastStringableTest_javaStringPropertyTest, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<String, String> testStringMap1 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), ((int) chunkLen1)));
+            } else {
+                Map<String, String> testStringMapReuse0 = null;
+                Object oldMap0 = FastStringableTest_javaStringPropertyTest.get(3);
+                if (oldMap0 instanceof Map) {
+                    testStringMapReuse0 = ((Map) oldMap0);
+                }
+                if (testStringMapReuse0 != (null)) {
+                    testStringMapReuse0 .clear();
+                    testStringMap1 = testStringMapReuse0;
+                } else {
+                    testStringMap1 = new HashMap<String, String>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    String key0 = (decoder.readString());
+                    String charSequence3 = (decoder).readString();
+                    testStringMap1 .put(key0, charSequence3);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                testStringMap1 = ((Map)(customization).getNewMapOverrideFunc().apply(FastStringableTest_javaStringPropertyTest.get(3), 0));
+            } else {
+                testStringMap1 = new HashMap<String, String>(0);
+            }
+        }
+        FastStringableTest_javaStringPropertyTest.put(3, testStringMap1);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
new file mode 100644
index 000000000..c596fa7bd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978.java
@@ -0,0 +1,1115 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_TestRecord_SpecificDeserializer_1100791978_1100791978(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
new file mode 100644
index 000000000..6f4e366c7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_UNION_GenericDeserializer_2140000109_2140000109.java
@@ -0,0 +1,107 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericDeserializer_2140000109_2140000109
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema mapValueOptionSchema0;
+    private final Schema field0;
+
+    public Map_of_UNION_GenericDeserializer_2140000109_2140000109(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.mapValueOptionSchema0 = mapMapValueSchema0 .getTypes().get(1);
+        this.field0 = mapValueOptionSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapValueOptionSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapValueOptionSchema0);
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex1 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex1));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_UNION_SpecificDeserializer_971650236_971650236.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
new file mode 100644
index 000000000..147edaaff
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_UNION_SpecificDeserializer_971650236_971650236.java
@@ -0,0 +1,1125 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_SpecificDeserializer_971650236_971650236
+    implements FastDeserializer<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>>
+{
+
+    private final Schema readerSchema;
+
+    public Map_of_UNION_SpecificDeserializer_971650236_971650236(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> deserialize(Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    int unionIndex0 = (decoder.readIndex());
+                    if (unionIndex0 == 0) {
+                        decoder.readNull();
+                        map0 .put(key0, null);
+                    } else {
+                        if (unionIndex0 == 1) {
+                            map0 .put(key0, deserializeTestRecord0(null, (decoder), (customization)));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'mapValue': "+ unionIndex0));
+                        }
+                    }
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.TestRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex4));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex5 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex5));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex6 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex6));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex7 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex7));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex14 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen5 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen5));
+        }
+        while (chunkLen5 > 0) {
+            for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen5 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen6 = (decoder.readMapStart());
+        if (chunkLen6 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen6)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen6 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    recordsMap0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen6 = (decoder.mapNext());
+            } while (chunkLen6 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex15 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen7 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen7));
+                }
+                while (chunkLen7 > 0) {
+                    for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex16 = (decoder.readIndex());
+                        if (unionIndex16 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex16 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex16));
+                            }
+                        }
+                    }
+                    chunkLen7 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex17 = (decoder.readIndex());
+        if (unionIndex17 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex17 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen8 = (decoder.readMapStart());
+                if (chunkLen8 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen8)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen8 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsMapUnionOption0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen8 = (decoder.mapNext());
+                    } while (chunkLen8 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex17));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen9 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen9));
+        }
+        while (chunkLen9 > 0) {
+            for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen10 = (decoder.readMapStart());
+                if (chunkLen10 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen10)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                            Utf8 key3 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key3, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsArrayMapElem0 .put(key3, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen10 = (decoder.mapNext());
+                    } while (chunkLen10 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen9 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen11)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen11 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen12 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen12));
+                    }
+                    while (chunkLen12 > 0) {
+                        for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen12 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key4, recordsMapArrayValue0);
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex21 = (decoder.readIndex());
+        if (unionIndex21 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex21 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen13 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen13));
+                }
+                while (chunkLen13 > 0) {
+                    for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen14 = (decoder.readMapStart());
+                        if (chunkLen14 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen14)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                                    Utf8 key5 = (decoder.readString(null));
+                                    int unionIndex22 = (decoder.readIndex());
+                                    if (unionIndex22 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key5, null);
+                                    } else {
+                                        if (unionIndex22 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key5, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex22));
+                                        }
+                                    }
+                                }
+                                chunkLen14 = (decoder.mapNext());
+                            } while (chunkLen14 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen13 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex21));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex23 = (decoder.readIndex());
+        if (unionIndex23 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex23 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen15 = (decoder.readMapStart());
+                if (chunkLen15 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen15)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen15 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                            Utf8 key6 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen16 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen16));
+                            }
+                            while (chunkLen16 > 0) {
+                                for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex24 = (decoder.readIndex());
+                                    if (unionIndex24 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex24 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex24));
+                                        }
+                                    }
+                                }
+                                chunkLen16 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key6, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen15 = (decoder.mapNext());
+                    } while (chunkLen15 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex23));
+            }
+        }
+        int unionIndex25 = (decoder.readIndex());
+        if (unionIndex25 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex25 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex25 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex25 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex25));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen21 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen21));
+        }
+        while (chunkLen21 > 0) {
+            for (int counter21 = 0; (counter21 <chunkLen21); counter21 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen21 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_record_GenericDeserializer_1223705675_568621313.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_record_GenericDeserializer_1223705675_568621313.java
new file mode 100644
index 000000000..6b0fe4176
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_record_GenericDeserializer_1223705675_568621313.java
@@ -0,0 +1,86 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1223705675_568621313
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionOptionMapValueSchema0;
+
+    public Map_of_record_GenericDeserializer_1223705675_568621313(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionOptionMapValueSchema0 = readerSchema.getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":{\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, IndexedRecord> unionOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, IndexedRecord> unionOptionReuse0 = null;
+                        if ((reuse) instanceof Map) {
+                            unionOptionReuse0 = ((Map)(reuse));
+                        }
+                        if (unionOptionReuse0 != (null)) {
+                            unionOptionReuse0 .clear();
+                            unionOption0 = unionOptionReuse0;
+                        } else {
+                            unionOption0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            unionOption0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        unionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+                    } else {
+                        unionOption0 = new HashMap<Utf8, IndexedRecord>(0);
+                    }
+                }
+                return unionOption0;
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == unionOptionMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(unionOptionMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_record_GenericDeserializer_1677529043_1677529043.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_record_GenericDeserializer_1677529043_1677529043.java
new file mode 100644
index 000000000..9b9ea77c6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/Map_of_record_GenericDeserializer_1677529043_1677529043.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericDeserializer_1677529043_1677529043
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapValueSchema0;
+    private final Schema field0;
+
+    public Map_of_record_GenericDeserializer_1677529043_1677529043(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapValueSchema0 = readerSchema.getValueType();
+        this.field0 = mapMapValueSchema0 .getField("field").schema();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            record.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = record.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                record.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
new file mode 100644
index 000000000..71c7c7615
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField>
+{
+
+    private final Schema readerSchema;
+
+    public RecordWithLargeUnionField_SpecificDeserializer_1132455741_1570175609(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserialize(com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRecordWithLargeUnionField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField deserializeRecordWithLargeUnionField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField RecordWithLargeUnionField;
+        if ((reuse)!= null) {
+            RecordWithLargeUnionField = ((com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField)(reuse));
+        } else {
+            RecordWithLargeUnionField = new com.linkedin.avro.fastserde.generated.avro.RecordWithLargeUnionField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            Utf8 charSequence0;
+            Object oldString0 = RecordWithLargeUnionField.get(0);
+            if (oldString0 instanceof Utf8) {
+                charSequence0 = (decoder).readString(((Utf8) oldString0));
+            } else {
+                charSequence0 = (decoder).readString(null);
+            }
+            RecordWithLargeUnionField.put(0, charSequence0);
+        } else {
+            if (unionIndex0 == 1) {
+                RecordWithLargeUnionField.put(0, (decoder.readInt()));
+            } else {
+                if (unionIndex0 == 2) {
+                    throw new AvroTypeException(new StringBuilder().append("Found").append(" \"byt").append("es\", ").append("expec").append("ting ").append("[\"str").append("ing\",").append(" \"int").append("\"]").toString());
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+                }
+            }
+        }
+        return RecordWithLargeUnionField;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
new file mode 100644
index 000000000..0ceb78552
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_1438463600_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        return RemovedTypesTestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
new file mode 100644
index 000000000..eadc0898f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691.java
@@ -0,0 +1,406 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public RemovedTypesTestRecord_SpecificDeserializer_605055252_36310691(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeRemovedTypesTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord deserializeRemovedTypesTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord;
+        if ((reuse)!= null) {
+            RemovedTypesTestRecord = ((com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord)(reuse));
+        } else {
+            RemovedTypesTestRecord = new com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord();
+        }
+        Utf8 charSequence0;
+        Object oldString0 = RemovedTypesTestRecord.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        RemovedTypesTestRecord.put(0, charSequence0);
+        populate_RemovedTypesTestRecord0((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord1((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord2((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord3((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord4((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord5((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord6((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord7((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord8((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord9((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord10((RemovedTypesTestRecord), (customization), (decoder));
+        populate_RemovedTypesTestRecord11((RemovedTypesTestRecord), (customization), (decoder));
+        return RemovedTypesTestRecord;
+    }
+
+    private void populate_RemovedTypesTestRecord0(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipBytes();
+        long chunkLen0 = (decoder.readArrayStart());
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object removedBytesArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipBytes();
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord1(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex0 == 1) {
+                decoder.skipBytes();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedBytesUnion': "+ unionIndex0));
+            }
+        }
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    decoder.skipBytes();
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord2(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen2 = (decoder.readArrayStart());
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                Object removedBytesUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedBytesUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex1 = (decoder.readIndex());
+                if (unionIndex1 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex1 == 1) {
+                        decoder.skipBytes();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedBytesUnionArrayElem': "+ unionIndex1));
+                    }
+                }
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        long chunkLen3 = (decoder.readMapStart());
+        if (chunkLen3 > 0) {
+            do {
+                for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                    Utf8 key1 = (decoder.readString(null));
+                    int unionIndex2 = (decoder.readIndex());
+                    if (unionIndex2 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex2 == 1) {
+                            decoder.skipBytes();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedBytesUnionMapValue': "+ unionIndex2));
+                        }
+                    }
+                }
+                chunkLen3 = (decoder.mapNext());
+            } while (chunkLen3 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord3(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.skipFixed(1);
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex3 == 1) {
+                decoder.skipFixed(1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedFixedUnion': "+ unionIndex3));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord4(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen4 = (decoder.readArrayStart());
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object removedFixedArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                decoder.skipFixed(1);
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key2 = (decoder.readString(null));
+                    decoder.skipFixed(1);
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord5(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen6 = (decoder.readArrayStart());
+        while (chunkLen6 > 0) {
+            for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                Object removedFixedUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex4 = (decoder.readIndex());
+                if (unionIndex4 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex4 == 1) {
+                        decoder.skipFixed(1);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedFixedUnionArrayElem': "+ unionIndex4));
+                    }
+                }
+            }
+            chunkLen6 = (decoder.arrayNext());
+        }
+        long chunkLen7 = (decoder.readMapStart());
+        if (chunkLen7 > 0) {
+            do {
+                for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    int unionIndex5 = (decoder.readIndex());
+                    if (unionIndex5 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex5 == 1) {
+                            decoder.skipFixed(1);
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedFixedUnionMapValue': "+ unionIndex5));
+                        }
+                    }
+                }
+                chunkLen7 = (decoder.mapNext());
+            } while (chunkLen7 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord6(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        decoder.readEnum();
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex6 == 1) {
+                decoder.readEnum();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedEnumUnion': "+ unionIndex6));
+            }
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord7(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen8 = (decoder.readArrayStart());
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                decoder.readEnum();
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        long chunkLen9 = (decoder.readMapStart());
+        if (chunkLen9 > 0) {
+            do {
+                for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                    Utf8 key4 = (decoder.readString(null));
+                    decoder.readEnum();
+                }
+                chunkLen9 = (decoder.mapNext());
+            } while (chunkLen9 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord8(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen10 = (decoder.readArrayStart());
+        while (chunkLen10 > 0) {
+            for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                Object removedEnumUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex7 = (decoder.readIndex());
+                if (unionIndex7 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex7 == 1) {
+                        decoder.readEnum();
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedEnumUnionArrayElem': "+ unionIndex7));
+                    }
+                }
+            }
+            chunkLen10 = (decoder.arrayNext());
+        }
+        long chunkLen11 = (decoder.readMapStart());
+        if (chunkLen11 > 0) {
+            do {
+                for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                    Utf8 key5 = (decoder.readString(null));
+                    int unionIndex8 = (decoder.readIndex());
+                    if (unionIndex8 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex8 == 1) {
+                            decoder.readEnum();
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedEnumUnionMapValue': "+ unionIndex8));
+                        }
+                    }
+                }
+                chunkLen11 = (decoder.mapNext());
+            } while (chunkLen11 > 0);
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord9(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        deserializeRemovedSubRecord0(null, (decoder), (customization));
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex9 == 1) {
+                deserializeRemovedSubRecord0(null, (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedSubRecordUnion': "+ unionIndex9));
+            }
+        }
+    }
+
+    public void deserializeRemovedSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        decoder.skipString();
+    }
+
+    private void populate_RemovedTypesTestRecord10(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen12 = (decoder.readArrayStart());
+        while (chunkLen12 > 0) {
+            for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                Object removedSubRecordArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                deserializeRemovedSubRecord0(removedSubRecordArrayArrayElementReuseVar0, (decoder), (customization));
+            }
+            chunkLen12 = (decoder.arrayNext());
+        }
+        long chunkLen13 = (decoder.readArrayStart());
+        while (chunkLen13 > 0) {
+            for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                Object removedSubRecordUnionArrayArrayElementReuseVar0 = null;
+                if (null instanceof GenericArray) {
+                    removedSubRecordUnionArrayArrayElementReuseVar0 = ((GenericArray) null).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                } else {
+                    if (unionIndex10 == 1) {
+                        deserializeRemovedSubRecord0(removedSubRecordUnionArrayArrayElementReuseVar0, (decoder), (customization));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen13 = (decoder.arrayNext());
+        }
+    }
+
+    private void populate_RemovedTypesTestRecord11(com.linkedin.avro.fastserde.generated.avro.RemovedTypesTestRecord RemovedTypesTestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        long chunkLen14 = (decoder.readMapStart());
+        if (chunkLen14 > 0) {
+            do {
+                for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                    Utf8 key6 = (decoder.readString(null));
+                    deserializeRemovedSubRecord0(null, (decoder), (customization));
+                }
+                chunkLen14 = (decoder.mapNext());
+            } while (chunkLen14 > 0);
+        }
+        long chunkLen15 = (decoder.readMapStart());
+        if (chunkLen15 > 0) {
+            do {
+                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                    Utf8 key7 = (decoder.readString(null));
+                    int unionIndex11 = (decoder.readIndex());
+                    if (unionIndex11 == 0) {
+                        decoder.readNull();
+                    } else {
+                        if (unionIndex11 == 1) {
+                            deserializeRemovedSubRecord0(null, (decoder), (customization));
+                        } else {
+                            throw new RuntimeException(("Illegal union index for 'removedSubRecordUnionMapValue': "+ unionIndex11));
+                        }
+                    }
+                }
+                chunkLen15 = (decoder.mapNext());
+            } while (chunkLen15 > 0);
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
new file mode 100644
index 000000000..f7991f039
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/SplitRecordTest1_SpecificDeserializer_1718878379_595582209.java
@@ -0,0 +1,176 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest1_SpecificDeserializer_1718878379_595582209
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest1_SpecificDeserializer_1718878379_595582209(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest10((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 deserializeSplitRecordTest10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1;
+        if ((reuse)!= null) {
+            SplitRecordTest1 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1)(reuse));
+        } else {
+            SplitRecordTest1 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1();
+        }
+        SplitRecordTest1 .put(0, deserializeFullRecord0(SplitRecordTest1 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest10((SplitRecordTest1), (customization), (decoder));
+        return SplitRecordTest1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = FullRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        FullRecord.put(1, null);
+        return FullRecord;
+    }
+
+    private void populate_SplitRecordTest10(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest1 SplitRecordTest1, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest1 .put(1, deserializeFullRecord1(SplitRecordTest1 .get(1), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest1 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            if (record30 instanceof GenericArray) {
+                ((GenericArray) record30).reset();
+            } else {
+                record30 .clear();
+            }
+        } else {
+            record30 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord2(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest1 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord1(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex1 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+        FullRecord.put(0, null);
+        return FullRecord;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.FullRecord deserializeFullRecord2(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord;
+        if ((reuse)!= null) {
+            FullRecord = ((com.linkedin.avro.fastserde.generated.avro.FullRecord)(reuse));
+        } else {
+            FullRecord = new com.linkedin.avro.fastserde.generated.avro.FullRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            FullRecord.put(0, null);
+        } else {
+            if (unionIndex2 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = FullRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                FullRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_FullRecord0((FullRecord), (customization), (decoder));
+        return FullRecord;
+    }
+
+    private void populate_FullRecord0(com.linkedin.avro.fastserde.generated.avro.FullRecord FullRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            FullRecord.put(1, null);
+        } else {
+            if (unionIndex3 == 1) {
+                FullRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
new file mode 100644
index 000000000..7247d3ecd
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/SplitRecordTest2_SpecificDeserializer_595582209_1718878379.java
@@ -0,0 +1,208 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FullRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringRecord;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class SplitRecordTest2_SpecificDeserializer_595582209_1718878379
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2>
+{
+
+    private final Schema readerSchema;
+
+    public SplitRecordTest2_SpecificDeserializer_595582209_1718878379(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserialize(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeSplitRecordTest20((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 deserializeSplitRecordTest20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2;
+        if ((reuse)!= null) {
+            SplitRecordTest2 = ((com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2)(reuse));
+        } else {
+            SplitRecordTest2 = new com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2();
+        }
+        SplitRecordTest2 .put(0, deserializeStringRecord0(SplitRecordTest2 .get(0), (decoder), (customization)));
+        populate_SplitRecordTest20((SplitRecordTest2), (customization), (decoder));
+        return SplitRecordTest2;
+    }
+
+    public StringRecord deserializeStringRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        StringRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((StringRecord)(reuse));
+        } else {
+            IntRecord = new StringRecord();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence0;
+                Object oldString0 = IntRecord.get(0);
+                if (oldString0 instanceof Utf8) {
+                    charSequence0 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence0 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex0));
+            }
+        }
+        populate_IntRecord0((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord0(StringRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex1 == 1) {
+                decoder.readInt();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex1));
+            }
+        }
+    }
+
+    private void populate_SplitRecordTest20(com.linkedin.avro.fastserde.generated.avro.SplitRecordTest2 SplitRecordTest2, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        SplitRecordTest2 .put(1, deserializeIntRecord0(SplitRecordTest2 .get(1), (decoder), (customization)));
+        List<FullRecord> record30 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = SplitRecordTest2 .get(2);
+        if (oldArray0 instanceof List) {
+            record30 = ((List) oldArray0);
+            if (record30 instanceof GenericArray) {
+                ((GenericArray) record30).reset();
+            } else {
+                record30 .clear();
+            }
+        } else {
+            record30 = new ArrayList<FullRecord>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object record3ArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    record3ArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                record30 .add(deserializeFullRecord0(record3ArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        SplitRecordTest2 .put(2, record30);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.IntRecord deserializeIntRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((com.linkedin.avro.fastserde.generated.avro.IntRecord)(reuse));
+        } else {
+            IntRecord = new com.linkedin.avro.fastserde.generated.avro.IntRecord();
+        }
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex2 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex2));
+            }
+        }
+        populate_IntRecord1((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord1(com.linkedin.avro.fastserde.generated.avro.IntRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex3 == 1) {
+                IntRecord.put(0, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex3));
+            }
+        }
+    }
+
+    public FullRecord deserializeFullRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        FullRecord IntRecord;
+        if ((reuse)!= null) {
+            IntRecord = ((FullRecord)(reuse));
+        } else {
+            IntRecord = new FullRecord();
+        }
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            IntRecord.put(0, null);
+        } else {
+            if (unionIndex4 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = IntRecord.get(0);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                IntRecord.put(0, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field1': "+ unionIndex4));
+            }
+        }
+        populate_IntRecord2((IntRecord), (customization), (decoder));
+        return IntRecord;
+    }
+
+    private void populate_IntRecord2(FullRecord IntRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            IntRecord.put(1, null);
+        } else {
+            if (unionIndex5 == 1) {
+                IntRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'field2': "+ unionIndex5));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/StringableRecord_SpecificDeserializer_842267318_842267318.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/StringableRecord_SpecificDeserializer_842267318_842267318.java
new file mode 100644
index 000000000..ab6aaba1b
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/StringableRecord_SpecificDeserializer_842267318_842267318.java
@@ -0,0 +1,228 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroRuntimeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificDeserializer_842267318_842267318
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.StringableRecord>
+{
+
+    private final Schema readerSchema;
+
+    public StringableRecord_SpecificDeserializer_842267318_842267318(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserialize(com.linkedin.avro.fastserde.generated.avro.StringableRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        try {
+            return deserializeStringableRecord0((reuse), (decoder), (customization));
+        } catch (NumberFormatException e) {
+            throw new AvroRuntimeException(e);
+        } catch (MalformedURLException e) {
+            throw new AvroRuntimeException(e);
+        } catch (URISyntaxException e) {
+            throw new AvroRuntimeException(e);
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableRecord deserializeStringableRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord;
+        if ((reuse)!= null) {
+            StringableRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableRecord)(reuse));
+        } else {
+            StringableRecord = new com.linkedin.avro.fastserde.generated.avro.StringableRecord();
+        }
+        BigInteger charSequence0 = new BigInteger((decoder.readString()));
+        StringableRecord.put(0, charSequence0);
+        populate_StringableRecord0((StringableRecord), (customization), (decoder));
+        populate_StringableRecord1((StringableRecord), (customization), (decoder));
+        populate_StringableRecord2((StringableRecord), (customization), (decoder));
+        populate_StringableRecord3((StringableRecord), (customization), (decoder));
+        populate_StringableRecord4((StringableRecord), (customization), (decoder));
+        return StringableRecord;
+    }
+
+    private void populate_StringableRecord0(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, URISyntaxException
+    {
+        BigDecimal charSequence1 = new BigDecimal((decoder.readString()));
+        StringableRecord.put(1, charSequence1);
+        URI charSequence2 = new URI((decoder.readString()));
+        StringableRecord.put(2, charSequence2);
+    }
+
+    private void populate_StringableRecord1(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        URL charSequence3 = new URL((decoder.readString()));
+        StringableRecord.put(3, charSequence3);
+        File charSequence4 = new File((decoder.readString()));
+        StringableRecord.put(4, charSequence4);
+    }
+
+    private void populate_StringableRecord2(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        List<URL> urlArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = StringableRecord.get(5);
+        if (oldArray0 instanceof List) {
+            urlArray0 = ((List) oldArray0);
+            if (urlArray0 instanceof GenericArray) {
+                ((GenericArray) urlArray0).reset();
+            } else {
+                urlArray0 .clear();
+            }
+        } else {
+            urlArray0 = new ArrayList<URL>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object urlArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    urlArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                URL charSequence5 = new URL((decoder.readString()));
+                urlArray0 .add(charSequence5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        StringableRecord.put(5, urlArray0);
+        Map<URL, BigInteger> urlMap0 = null;
+        long chunkLen1 = (decoder.readMapStart());
+        if (chunkLen1 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), ((int) chunkLen1)));
+            } else {
+                Map<URL, BigInteger> urlMapReuse0 = null;
+                Object oldMap0 = StringableRecord.get(6);
+                if (oldMap0 instanceof Map) {
+                    urlMapReuse0 = ((Map) oldMap0);
+                }
+                if (urlMapReuse0 != (null)) {
+                    urlMapReuse0 .clear();
+                    urlMap0 = urlMapReuse0;
+                } else {
+                    urlMap0 = new HashMap<URL, BigInteger>(((int)(((chunkLen1 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                    URL key0 = new URL((decoder.readString()));
+                    BigInteger charSequence6 = new BigInteger((decoder.readString()));
+                    urlMap0 .put(key0, charSequence6);
+                }
+                chunkLen1 = (decoder.mapNext());
+            } while (chunkLen1 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                urlMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(StringableRecord.get(6), 0));
+            } else {
+                urlMap0 = new HashMap<URL, BigInteger>(0);
+            }
+        }
+        StringableRecord.put(6, urlMap0);
+    }
+
+    private void populate_StringableRecord3(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        StringableRecord.put(7, deserializeStringableSubRecord0(StringableRecord.get(7), (decoder), (customization)));
+        StringableRecord.put(8, deserializeAnotherSubRecord0(StringableRecord.get(8), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.StringableSubRecord deserializeStringableSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord;
+        if ((reuse)!= null) {
+            StringableSubRecord = ((com.linkedin.avro.fastserde.generated.avro.StringableSubRecord)(reuse));
+        } else {
+            StringableSubRecord = new com.linkedin.avro.fastserde.generated.avro.StringableSubRecord();
+        }
+        URI charSequence7 = new URI((decoder.readString()));
+        StringableSubRecord.put(0, charSequence7);
+        populate_StringableSubRecord0((StringableSubRecord), (customization), (decoder));
+        return StringableSubRecord;
+    }
+
+    private void populate_StringableSubRecord0(com.linkedin.avro.fastserde.generated.avro.StringableSubRecord StringableSubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, URISyntaxException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            StringableSubRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                Utf8 charSequence8;
+                Object oldString0 = StringableSubRecord.get(1);
+                if (oldString0 instanceof Utf8) {
+                    charSequence8 = (decoder).readString(((Utf8) oldString0));
+                } else {
+                    charSequence8 = (decoder).readString(null);
+                }
+                StringableSubRecord.put(1, charSequence8);
+            } else {
+                if (unionIndex0 == 2) {
+                    StringableSubRecord.put(1, (decoder.readInt()));
+                } else {
+                    throw new RuntimeException(("Illegal union index for 'nullStringIntUnion': "+ unionIndex0));
+                }
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord deserializeAnotherSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException, URISyntaxException
+    {
+        com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord AnotherSubRecord;
+        if ((reuse)!= null) {
+            AnotherSubRecord = ((com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord)(reuse));
+        } else {
+            AnotherSubRecord = new com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord();
+        }
+        AnotherSubRecord.put(0, deserializeStringableSubRecord0(AnotherSubRecord.get(0), (decoder), (customization)));
+        return AnotherSubRecord;
+    }
+
+    private void populate_StringableRecord4(com.linkedin.avro.fastserde.generated.avro.StringableRecord StringableRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException, NumberFormatException, MalformedURLException, URISyntaxException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            StringableRecord.put(9, null);
+        } else {
+            if (unionIndex1 == 1) {
+                String charSequence9 = (decoder).readString();
+                StringableRecord.put(9, charSequence9);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'stringUnion': "+ unionIndex1));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
new file mode 100644
index 000000000..f2872d21f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestArrayOfFloats_GenericDeserializer_1408566797_1408566797.java
@@ -0,0 +1,46 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class TestArrayOfFloats_GenericDeserializer_1408566797_1408566797
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema array_of_float0;
+
+    public TestArrayOfFloats_GenericDeserializer_1408566797_1408566797(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.array_of_float0 = readerSchema.getField("array_of_float").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestArrayOfFloats0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestArrayOfFloats0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestArrayOfFloats;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestArrayOfFloats = ((IndexedRecord)(reuse));
+        } else {
+            TestArrayOfFloats = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveFloatList array_of_float1 = null;
+        array_of_float1 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestArrayOfFloats.get(0), (decoder)));
+        TestArrayOfFloats.put(0, array_of_float1);
+        return TestArrayOfFloats;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_GenericDeserializer_473555078_473555078.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_GenericDeserializer_473555078_473555078.java
new file mode 100644
index 000000000..f870432d7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_GenericDeserializer_473555078_473555078.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_GenericDeserializer_473555078_473555078
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema map_field0;
+
+    public TestRecord_GenericDeserializer_473555078_473555078(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.map_field0 = readerSchema.getField("map_field").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord TestRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            TestRecord = ((IndexedRecord)(reuse));
+        } else {
+            TestRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Utf8> map_field1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Utf8> map_fieldReuse0 = null;
+                Object oldMap0 = TestRecord.get(0);
+                if (oldMap0 instanceof Map) {
+                    map_fieldReuse0 = ((Map) oldMap0);
+                }
+                if (map_fieldReuse0 != (null)) {
+                    map_fieldReuse0 .clear();
+                    map_field1 = map_fieldReuse0;
+                } else {
+                    map_field1 = new HashMap<Utf8, Utf8>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    Utf8 charSequence0 = (decoder).readString(null);
+                    map_field1 .put(key0, charSequence0);
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map_field1 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(0), 0));
+            } else {
+                map_field1 = new HashMap<Utf8, Utf8>(0);
+            }
+        }
+        TestRecord.put(0, map_field1);
+        return TestRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_1898726132_553331077.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_1898726132_553331077.java
new file mode 100644
index 000000000..41e944775
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_1898726132_553331077.java
@@ -0,0 +1,1079 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1898726132_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1898726132_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(5);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(5);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(5);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(5);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_1991094399_553331077.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_1991094399_553331077.java
new file mode 100644
index 000000000..052314790
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_1991094399_553331077.java
@@ -0,0 +1,1083 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_1991094399_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+    private final Map enumMappingTestEnum0;
+    private final Map enumMappingTestEnum1;
+    private final Map enumMappingTestEnum2;
+    private final Map enumMappingTestEnum3;
+
+    public TestRecord_SpecificDeserializer_1991094399_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        HashMap tempEnumMapping0 = new HashMap(6);
+        tempEnumMapping0 .put(new Integer(0), new Integer(4));
+        tempEnumMapping0 .put(new Integer(1), new Integer(3));
+        tempEnumMapping0 .put(new Integer(2), new Integer(1));
+        tempEnumMapping0 .put(new Integer(3), new Integer(2));
+        tempEnumMapping0 .put(new Integer(4), new Integer(0));
+        tempEnumMapping0 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+        HashMap tempEnumMapping1 = new HashMap(6);
+        tempEnumMapping1 .put(new Integer(0), new Integer(4));
+        tempEnumMapping1 .put(new Integer(1), new Integer(3));
+        tempEnumMapping1 .put(new Integer(2), new Integer(1));
+        tempEnumMapping1 .put(new Integer(3), new Integer(2));
+        tempEnumMapping1 .put(new Integer(4), new Integer(0));
+        tempEnumMapping1 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum1 = Collections.unmodifiableMap(tempEnumMapping1);
+        HashMap tempEnumMapping2 = new HashMap(6);
+        tempEnumMapping2 .put(new Integer(0), new Integer(4));
+        tempEnumMapping2 .put(new Integer(1), new Integer(3));
+        tempEnumMapping2 .put(new Integer(2), new Integer(1));
+        tempEnumMapping2 .put(new Integer(3), new Integer(2));
+        tempEnumMapping2 .put(new Integer(4), new Integer(0));
+        tempEnumMapping2 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum2 = Collections.unmodifiableMap(tempEnumMapping2);
+        HashMap tempEnumMapping3 = new HashMap(6);
+        tempEnumMapping3 .put(new Integer(0), new Integer(4));
+        tempEnumMapping3 .put(new Integer(1), new Integer(3));
+        tempEnumMapping3 .put(new Integer(2), new Integer(1));
+        tempEnumMapping3 .put(new Integer(3), new Integer(2));
+        tempEnumMapping3 .put(new Integer(4), new Integer(0));
+        tempEnumMapping3 .put(new Integer(5), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.TestEnum: No match for F"));
+        this.enumMappingTestEnum3 = Collections.unmodifiableMap(tempEnumMapping3);
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        ArrayList<Boolean> defaultArray0 = new ArrayList<Boolean>();
+        TestRecord.put(33, defaultArray0);
+        ArrayList<Double> defaultArray1 = new ArrayList<Double>();
+        TestRecord.put(34, defaultArray1);
+        ArrayList<Float> defaultArray2 = new ArrayList<Float>();
+        TestRecord.put(35, defaultArray2);
+        ArrayList<Integer> defaultArray3 = new ArrayList<Integer>();
+        TestRecord.put(36, defaultArray3);
+        ArrayList<Long> defaultArray4 = new ArrayList<Long>();
+        TestRecord.put(37, defaultArray4);
+        ArrayList<Utf8> defaultArray5 = new ArrayList<Utf8>();
+        TestRecord.put(38, defaultArray5);
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex7 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex7));
+            }
+        }
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+        int unionIndex8 = (decoder.readIndex());
+        if (unionIndex8 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex8 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex8));
+            }
+        }
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex9 = (decoder.readIndex());
+                if (unionIndex9 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex9 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex9));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int enumIndex0 = (decoder.readEnum());
+        TestEnum enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingTestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult0));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex0));
+            }
+        }
+        TestRecord.put(18, enumValue0);
+        int unionIndex10 = (decoder.readIndex());
+        if (unionIndex10 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex10 == 1) {
+                int enumIndex1 = (decoder.readEnum());
+                TestEnum enumValue1 = null;
+                Object enumIndexLookupResult1 = enumMappingTestEnum1 .get(enumIndex1);
+                if (enumIndexLookupResult1 instanceof Integer) {
+                    enumValue1 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult1));
+                } else {
+                    if (enumIndexLookupResult1 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult1);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex1));
+                    }
+                }
+                TestRecord.put(19, enumValue1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex10));
+            }
+        }
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                int enumIndex2 = (decoder.readEnum());
+                TestEnum enumValue2 = null;
+                Object enumIndexLookupResult2 = enumMappingTestEnum2 .get(enumIndex2);
+                if (enumIndexLookupResult2 instanceof Integer) {
+                    enumValue2 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult2));
+                } else {
+                    if (enumIndexLookupResult2 instanceof AvroTypeException) {
+                        throw((AvroTypeException) enumIndexLookupResult2);
+                    } else {
+                        throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex2));
+                    }
+                }
+                testEnumArray0 .add(enumValue2);
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex11 = (decoder.readIndex());
+                if (unionIndex11 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex11 == 1) {
+                        int enumIndex3 = (decoder.readEnum());
+                        TestEnum enumValue3 = null;
+                        Object enumIndexLookupResult3 = enumMappingTestEnum3 .get(enumIndex3);
+                        if (enumIndexLookupResult3 instanceof Integer) {
+                            enumValue3 = Enums.getConstant(TestEnum.class, ((Integer) enumIndexLookupResult3));
+                        } else {
+                            if (enumIndexLookupResult3 instanceof AvroTypeException) {
+                                throw((AvroTypeException) enumIndexLookupResult3);
+                            } else {
+                                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.TestEnum': "+ enumIndex3));
+                            }
+                        }
+                        testEnumUnionArray0 .add(enumValue3);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex11));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex12 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex12));
+            }
+        }
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex13));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+        } else {
+            if (unionIndex14 == 1) {
+                decoder.skipString();
+            } else {
+                throw new RuntimeException(("Illegal union index for 'removedField': "+ unionIndex14));
+            }
+        }
+        int unionIndex15 = (decoder.readIndex());
+        if (unionIndex15 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex15 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex15));
+            }
+        }
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex16 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex17 = (decoder.readIndex());
+                        if (unionIndex17 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex17 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex17));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex16));
+            }
+        }
+        int unionIndex18 = (decoder.readIndex());
+        if (unionIndex18 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex18 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex18));
+            }
+        }
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex20 = (decoder.readIndex());
+                            if (unionIndex20 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex20 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex20));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex21 = (decoder.readIndex());
+                            if (unionIndex21 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex21 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex21));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex22 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex24 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex25 = (decoder.readIndex());
+                                    if (unionIndex25 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex25 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex25));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex24));
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex26 = (decoder.readIndex());
+        if (unionIndex26 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex26 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex26 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex26 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex26));
+                    }
+                }
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_553331077_553331077.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_553331077_553331077.java
new file mode 100644
index 000000000..ed71b2ac3
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/TestRecord_SpecificDeserializer_553331077_553331077.java
@@ -0,0 +1,1084 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.TestEnum;
+import com.linkedin.avro.fastserde.generated.avro.TestFixed;
+import com.linkedin.avro.fastserde.primitive.PrimitiveBooleanArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveDoubleArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import com.linkedin.avro.fastserde.primitive.PrimitiveLongArrayList;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class TestRecord_SpecificDeserializer_553331077_553331077
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.TestRecord>
+{
+
+    private final Schema readerSchema;
+
+    public TestRecord_SpecificDeserializer_553331077_553331077(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserialize(com.linkedin.avro.fastserde.generated.avro.TestRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeTestRecord0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.TestRecord deserializeTestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord;
+        if ((reuse)!= null) {
+            TestRecord = ((com.linkedin.avro.fastserde.generated.avro.TestRecord)(reuse));
+        } else {
+            TestRecord = new com.linkedin.avro.fastserde.generated.avro.TestRecord();
+        }
+        TestRecord.put(0, (decoder.readInt()));
+        populate_TestRecord0((TestRecord), (customization), (decoder));
+        populate_TestRecord1((TestRecord), (customization), (decoder));
+        populate_TestRecord2((TestRecord), (customization), (decoder));
+        populate_TestRecord3((TestRecord), (customization), (decoder));
+        populate_TestRecord4((TestRecord), (customization), (decoder));
+        populate_TestRecord5((TestRecord), (customization), (decoder));
+        populate_TestRecord6((TestRecord), (customization), (decoder));
+        populate_TestRecord7((TestRecord), (customization), (decoder));
+        populate_TestRecord8((TestRecord), (customization), (decoder));
+        populate_TestRecord9((TestRecord), (customization), (decoder));
+        populate_TestRecord10((TestRecord), (customization), (decoder));
+        populate_TestRecord11((TestRecord), (customization), (decoder));
+        populate_TestRecord12((TestRecord), (customization), (decoder));
+        populate_TestRecord13((TestRecord), (customization), (decoder));
+        populate_TestRecord14((TestRecord), (customization), (decoder));
+        populate_TestRecord15((TestRecord), (customization), (decoder));
+        populate_TestRecord16((TestRecord), (customization), (decoder));
+        populate_TestRecord17((TestRecord), (customization), (decoder));
+        populate_TestRecord18((TestRecord), (customization), (decoder));
+        return TestRecord;
+    }
+
+    private void populate_TestRecord0(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            TestRecord.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                TestRecord.put(1, (decoder.readInt()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testIntUnion': "+ unionIndex0));
+            }
+        }
+        TestRecord.put(2, (decoder.readLong()));
+    }
+
+    private void populate_TestRecord1(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex1 = (decoder.readIndex());
+        if (unionIndex1 == 0) {
+            decoder.readNull();
+            TestRecord.put(3, null);
+        } else {
+            if (unionIndex1 == 1) {
+                TestRecord.put(3, (decoder.readLong()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testLongUnion': "+ unionIndex1));
+            }
+        }
+        TestRecord.put(4, (decoder.readDouble()));
+    }
+
+    private void populate_TestRecord2(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex2 = (decoder.readIndex());
+        if (unionIndex2 == 0) {
+            decoder.readNull();
+            TestRecord.put(5, null);
+        } else {
+            if (unionIndex2 == 1) {
+                TestRecord.put(5, (decoder.readDouble()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testDoubleUnion': "+ unionIndex2));
+            }
+        }
+        TestRecord.put(6, (decoder.readFloat()));
+    }
+
+    private void populate_TestRecord3(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex3 = (decoder.readIndex());
+        if (unionIndex3 == 0) {
+            decoder.readNull();
+            TestRecord.put(7, null);
+        } else {
+            if (unionIndex3 == 1) {
+                TestRecord.put(7, (decoder.readFloat()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFloatUnion': "+ unionIndex3));
+            }
+        }
+        TestRecord.put(8, (decoder.readBoolean()));
+    }
+
+    private void populate_TestRecord4(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex4 = (decoder.readIndex());
+        if (unionIndex4 == 0) {
+            decoder.readNull();
+            TestRecord.put(9, null);
+        } else {
+            if (unionIndex4 == 1) {
+                TestRecord.put(9, (decoder.readBoolean()));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBooleanUnion': "+ unionIndex4));
+            }
+        }
+        ByteBuffer byteBuffer0;
+        Object oldBytes0 = TestRecord.get(10);
+        if (oldBytes0 instanceof ByteBuffer) {
+            byteBuffer0 = (decoder).readBytes(((ByteBuffer) oldBytes0));
+        } else {
+            byteBuffer0 = (decoder).readBytes((null));
+        }
+        TestRecord.put(10, byteBuffer0);
+    }
+
+    private void populate_TestRecord5(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex5 = (decoder.readIndex());
+        if (unionIndex5 == 0) {
+            decoder.readNull();
+            TestRecord.put(11, null);
+        } else {
+            if (unionIndex5 == 1) {
+                ByteBuffer byteBuffer1;
+                Object oldBytes1 = TestRecord.get(11);
+                if (oldBytes1 instanceof ByteBuffer) {
+                    byteBuffer1 = (decoder).readBytes(((ByteBuffer) oldBytes1));
+                } else {
+                    byteBuffer1 = (decoder).readBytes((null));
+                }
+                TestRecord.put(11, byteBuffer1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testBytesUnion': "+ unionIndex5));
+            }
+        }
+        Utf8 charSequence0;
+        Object oldString0 = TestRecord.get(12);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        TestRecord.put(12, charSequence0);
+    }
+
+    private void populate_TestRecord6(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex6 = (decoder.readIndex());
+        if (unionIndex6 == 0) {
+            decoder.readNull();
+            TestRecord.put(13, null);
+        } else {
+            if (unionIndex6 == 1) {
+                Utf8 charSequence1;
+                Object oldString1 = TestRecord.get(13);
+                if (oldString1 instanceof Utf8) {
+                    charSequence1 = (decoder).readString(((Utf8) oldString1));
+                } else {
+                    charSequence1 = (decoder).readString(null);
+                }
+                TestRecord.put(13, charSequence1);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testStringUnion': "+ unionIndex6));
+            }
+        }
+        byte[] testFixed0;
+        Object oldFixed0 = TestRecord.get(14);
+        if ((oldFixed0 instanceof GenericFixed)&&(((GenericFixed) oldFixed0).bytes().length == (1))) {
+            testFixed0 = ((GenericFixed) oldFixed0).bytes();
+        } else {
+            testFixed0 = ( new byte[1]);
+        }
+        decoder.readFixed(testFixed0);
+        TestFixed testFixed1 = new TestFixed();
+        testFixed1.bytes(testFixed0);
+        TestRecord.put(14, testFixed1);
+    }
+
+    private void populate_TestRecord7(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex7 = (decoder.readIndex());
+        if (unionIndex7 == 0) {
+            decoder.readNull();
+            TestRecord.put(15, null);
+        } else {
+            if (unionIndex7 == 1) {
+                byte[] testFixed2;
+                Object oldFixed1 = TestRecord.get(15);
+                if ((oldFixed1 instanceof GenericFixed)&&(((GenericFixed) oldFixed1).bytes().length == (1))) {
+                    testFixed2 = ((GenericFixed) oldFixed1).bytes();
+                } else {
+                    testFixed2 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed2);
+                TestFixed testFixed3 = new TestFixed();
+                testFixed3.bytes(testFixed2);
+                TestRecord.put(15, testFixed3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testFixedUnion': "+ unionIndex7));
+            }
+        }
+        List<GenericFixed> testFixedArray0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = TestRecord.get(16);
+        if (oldArray0 instanceof List) {
+            testFixedArray0 = ((List) oldArray0);
+            if (testFixedArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedArray0).reset();
+            } else {
+                testFixedArray0 .clear();
+            }
+        } else {
+            testFixedArray0 = new ArrayList<GenericFixed>(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object testFixedArrayArrayElementReuseVar0 = null;
+                if (oldArray0 instanceof GenericArray) {
+                    testFixedArrayArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                }
+                byte[] testFixed4;
+                Object oldFixed2 = testFixedArrayArrayElementReuseVar0;
+                if ((oldFixed2 instanceof GenericFixed)&&(((GenericFixed) oldFixed2).bytes().length == (1))) {
+                    testFixed4 = ((GenericFixed) oldFixed2).bytes();
+                } else {
+                    testFixed4 = ( new byte[1]);
+                }
+                decoder.readFixed(testFixed4);
+                TestFixed testFixed5 = new TestFixed();
+                testFixed5.bytes(testFixed4);
+                testFixedArray0 .add(testFixed5);
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        TestRecord.put(16, testFixedArray0);
+    }
+
+    private void populate_TestRecord8(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = null;
+        long chunkLen1 = (decoder.readArrayStart());
+        Object oldArray1 = TestRecord.get(17);
+        if (oldArray1 instanceof List) {
+            testFixedUnionArray0 = ((List) oldArray1);
+            if (testFixedUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testFixedUnionArray0).reset();
+            } else {
+                testFixedUnionArray0 .clear();
+            }
+        } else {
+            testFixedUnionArray0 = new ArrayList<GenericFixed>(((int) chunkLen1));
+        }
+        while (chunkLen1 > 0) {
+            for (int counter1 = 0; (counter1 <chunkLen1); counter1 ++) {
+                Object testFixedUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray1 instanceof GenericArray) {
+                    testFixedUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray1).peek();
+                }
+                int unionIndex8 = (decoder.readIndex());
+                if (unionIndex8 == 0) {
+                    decoder.readNull();
+                    testFixedUnionArray0 .add(null);
+                } else {
+                    if (unionIndex8 == 1) {
+                        byte[] testFixed6;
+                        Object oldFixed3 = testFixedUnionArrayArrayElementReuseVar0;
+                        if ((oldFixed3 instanceof GenericFixed)&&(((GenericFixed) oldFixed3).bytes().length == (1))) {
+                            testFixed6 = ((GenericFixed) oldFixed3).bytes();
+                        } else {
+                            testFixed6 = ( new byte[1]);
+                        }
+                        decoder.readFixed(testFixed6);
+                        TestFixed testFixed7 = new TestFixed();
+                        testFixed7.bytes(testFixed6);
+                        testFixedUnionArray0 .add(testFixed7);
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testFixedUnionArrayElem': "+ unionIndex8));
+                    }
+                }
+            }
+            chunkLen1 = (decoder.arrayNext());
+        }
+        TestRecord.put(17, testFixedUnionArray0);
+        TestRecord.put(18, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+    }
+
+    private void populate_TestRecord9(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex9 = (decoder.readIndex());
+        if (unionIndex9 == 0) {
+            decoder.readNull();
+            TestRecord.put(19, null);
+        } else {
+            if (unionIndex9 == 1) {
+                TestRecord.put(19, Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'testEnumUnion': "+ unionIndex9));
+            }
+        }
+        List<TestEnum> testEnumArray0 = null;
+        long chunkLen2 = (decoder.readArrayStart());
+        Object oldArray2 = TestRecord.get(20);
+        if (oldArray2 instanceof List) {
+            testEnumArray0 = ((List) oldArray2);
+            if (testEnumArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumArray0).reset();
+            } else {
+                testEnumArray0 .clear();
+            }
+        } else {
+            testEnumArray0 = new ArrayList<TestEnum>(((int) chunkLen2));
+        }
+        while (chunkLen2 > 0) {
+            for (int counter2 = 0; (counter2 <chunkLen2); counter2 ++) {
+                testEnumArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+            }
+            chunkLen2 = (decoder.arrayNext());
+        }
+        TestRecord.put(20, testEnumArray0);
+    }
+
+    private void populate_TestRecord10(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        List<TestEnum> testEnumUnionArray0 = null;
+        long chunkLen3 = (decoder.readArrayStart());
+        Object oldArray3 = TestRecord.get(21);
+        if (oldArray3 instanceof List) {
+            testEnumUnionArray0 = ((List) oldArray3);
+            if (testEnumUnionArray0 instanceof GenericArray) {
+                ((GenericArray) testEnumUnionArray0).reset();
+            } else {
+                testEnumUnionArray0 .clear();
+            }
+        } else {
+            testEnumUnionArray0 = new ArrayList<TestEnum>(((int) chunkLen3));
+        }
+        while (chunkLen3 > 0) {
+            for (int counter3 = 0; (counter3 <chunkLen3); counter3 ++) {
+                Object testEnumUnionArrayArrayElementReuseVar0 = null;
+                if (oldArray3 instanceof GenericArray) {
+                    testEnumUnionArrayArrayElementReuseVar0 = ((GenericArray) oldArray3).peek();
+                }
+                int unionIndex10 = (decoder.readIndex());
+                if (unionIndex10 == 0) {
+                    decoder.readNull();
+                    testEnumUnionArray0 .add(null);
+                } else {
+                    if (unionIndex10 == 1) {
+                        testEnumUnionArray0 .add(Enums.getConstant(TestEnum.class, (decoder.readEnum())));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'testEnumUnionArrayElem': "+ unionIndex10));
+                    }
+                }
+            }
+            chunkLen3 = (decoder.arrayNext());
+        }
+        TestRecord.put(21, testEnumUnionArray0);
+        int unionIndex11 = (decoder.readIndex());
+        if (unionIndex11 == 0) {
+            decoder.readNull();
+            TestRecord.put(22, null);
+        } else {
+            if (unionIndex11 == 1) {
+                TestRecord.put(22, deserializeSubRecord0(TestRecord.get(22), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecordUnion': "+ unionIndex11));
+            }
+        }
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.SubRecord deserializeSubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord;
+        if ((reuse)!= null) {
+            SubRecord = ((com.linkedin.avro.fastserde.generated.avro.SubRecord)(reuse));
+        } else {
+            SubRecord = new com.linkedin.avro.fastserde.generated.avro.SubRecord();
+        }
+        int unionIndex12 = (decoder.readIndex());
+        if (unionIndex12 == 0) {
+            decoder.readNull();
+            SubRecord.put(0, null);
+        } else {
+            if (unionIndex12 == 1) {
+                Utf8 charSequence2;
+                Object oldString2 = SubRecord.get(0);
+                if (oldString2 instanceof Utf8) {
+                    charSequence2 = (decoder).readString(((Utf8) oldString2));
+                } else {
+                    charSequence2 = (decoder).readString(null);
+                }
+                SubRecord.put(0, charSequence2);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subField': "+ unionIndex12));
+            }
+        }
+        populate_SubRecord0((SubRecord), (customization), (decoder));
+        return SubRecord;
+    }
+
+    private void populate_SubRecord0(com.linkedin.avro.fastserde.generated.avro.SubRecord SubRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex13 = (decoder.readIndex());
+        if (unionIndex13 == 0) {
+            decoder.readNull();
+            SubRecord.put(1, null);
+        } else {
+            if (unionIndex13 == 1) {
+                Utf8 charSequence3;
+                Object oldString3 = SubRecord.get(1);
+                if (oldString3 instanceof Utf8) {
+                    charSequence3 = (decoder).readString(((Utf8) oldString3));
+                } else {
+                    charSequence3 = (decoder).readString(null);
+                }
+                SubRecord.put(1, charSequence3);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'anotherField': "+ unionIndex13));
+            }
+        }
+    }
+
+    private void populate_TestRecord11(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        TestRecord.put(23, deserializeSubRecord0(TestRecord.get(23), (decoder), (customization)));
+        List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArray0 = null;
+        long chunkLen4 = (decoder.readArrayStart());
+        Object oldArray4 = TestRecord.get(24);
+        if (oldArray4 instanceof List) {
+            recordsArray0 = ((List) oldArray4);
+            if (recordsArray0 instanceof GenericArray) {
+                ((GenericArray) recordsArray0).reset();
+            } else {
+                recordsArray0 .clear();
+            }
+        } else {
+            recordsArray0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen4));
+        }
+        while (chunkLen4 > 0) {
+            for (int counter4 = 0; (counter4 <chunkLen4); counter4 ++) {
+                Object recordsArrayArrayElementReuseVar0 = null;
+                if (oldArray4 instanceof GenericArray) {
+                    recordsArrayArrayElementReuseVar0 = ((GenericArray) oldArray4).peek();
+                }
+                recordsArray0 .add(deserializeSubRecord0(recordsArrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen4 = (decoder.arrayNext());
+        }
+        TestRecord.put(24, recordsArray0);
+    }
+
+    private void populate_TestRecord12(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMap0 = null;
+        long chunkLen5 = (decoder.readMapStart());
+        if (chunkLen5 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), ((int) chunkLen5)));
+            } else {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapReuse0 = null;
+                Object oldMap0 = TestRecord.get(25);
+                if (oldMap0 instanceof Map) {
+                    recordsMapReuse0 = ((Map) oldMap0);
+                }
+                if (recordsMapReuse0 != (null)) {
+                    recordsMapReuse0 .clear();
+                    recordsMap0 = recordsMapReuse0;
+                } else {
+                    recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen5 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter5 = 0; (counter5 <chunkLen5); counter5 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    recordsMap0 .put(key0, deserializeSubRecord0(null, (decoder), (customization)));
+                }
+                chunkLen5 = (decoder.mapNext());
+            } while (chunkLen5 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMap0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(25), 0));
+            } else {
+                recordsMap0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+            }
+        }
+        TestRecord.put(25, recordsMap0);
+        int unionIndex14 = (decoder.readIndex());
+        if (unionIndex14 == 0) {
+            decoder.readNull();
+            TestRecord.put(26, null);
+        } else {
+            if (unionIndex14 == 1) {
+                List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayUnionOption0 = null;
+                long chunkLen6 = (decoder.readArrayStart());
+                Object oldArray5 = TestRecord.get(26);
+                if (oldArray5 instanceof List) {
+                    recordsArrayUnionOption0 = ((List) oldArray5);
+                    if (recordsArrayUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayUnionOption0).reset();
+                    } else {
+                        recordsArrayUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayUnionOption0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen6));
+                }
+                while (chunkLen6 > 0) {
+                    for (int counter6 = 0; (counter6 <chunkLen6); counter6 ++) {
+                        Object recordsArrayUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray5 instanceof GenericArray) {
+                            recordsArrayUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray5).peek();
+                        }
+                        int unionIndex15 = (decoder.readIndex());
+                        if (unionIndex15 == 0) {
+                            decoder.readNull();
+                            recordsArrayUnionOption0 .add(null);
+                        } else {
+                            if (unionIndex15 == 1) {
+                                recordsArrayUnionOption0 .add(deserializeSubRecord0(recordsArrayUnionOptionArrayElementReuseVar0, (decoder), (customization)));
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'recordsArrayUnionOptionElem': "+ unionIndex15));
+                            }
+                        }
+                    }
+                    chunkLen6 = (decoder.arrayNext());
+                }
+                TestRecord.put(26, recordsArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayUnion': "+ unionIndex14));
+            }
+        }
+    }
+
+    private void populate_TestRecord13(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex16 = (decoder.readIndex());
+        if (unionIndex16 == 0) {
+            decoder.readNull();
+            TestRecord.put(27, null);
+        } else {
+            if (unionIndex16 == 1) {
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOption0 = null;
+                long chunkLen7 = (decoder.readMapStart());
+                if (chunkLen7 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), ((int) chunkLen7)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapUnionOptionReuse0 = null;
+                        Object oldMap1 = TestRecord.get(27);
+                        if (oldMap1 instanceof Map) {
+                            recordsMapUnionOptionReuse0 = ((Map) oldMap1);
+                        }
+                        if (recordsMapUnionOptionReuse0 != (null)) {
+                            recordsMapUnionOptionReuse0 .clear();
+                            recordsMapUnionOption0 = recordsMapUnionOptionReuse0;
+                        } else {
+                            recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen7 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter7 = 0; (counter7 <chunkLen7); counter7 ++) {
+                            Utf8 key1 = (decoder.readString(null));
+                            int unionIndex17 = (decoder.readIndex());
+                            if (unionIndex17 == 0) {
+                                decoder.readNull();
+                                recordsMapUnionOption0 .put(key1, null);
+                            } else {
+                                if (unionIndex17 == 1) {
+                                    recordsMapUnionOption0 .put(key1, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapUnionOptionValue': "+ unionIndex17));
+                                }
+                            }
+                        }
+                        chunkLen7 = (decoder.mapNext());
+                    } while (chunkLen7 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(27), 0));
+                    } else {
+                        recordsMapUnionOption0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                TestRecord.put(27, recordsMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapUnion': "+ unionIndex16));
+            }
+        }
+        List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMap0 = null;
+        long chunkLen8 = (decoder.readArrayStart());
+        Object oldArray6 = TestRecord.get(28);
+        if (oldArray6 instanceof List) {
+            recordsArrayMap0 = ((List) oldArray6);
+            if (recordsArrayMap0 instanceof GenericArray) {
+                ((GenericArray) recordsArrayMap0).reset();
+            } else {
+                recordsArrayMap0 .clear();
+            }
+        } else {
+            recordsArrayMap0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen8));
+        }
+        while (chunkLen8 > 0) {
+            for (int counter8 = 0; (counter8 <chunkLen8); counter8 ++) {
+                Object recordsArrayMapArrayElementReuseVar0 = null;
+                if (oldArray6 instanceof GenericArray) {
+                    recordsArrayMapArrayElementReuseVar0 = ((GenericArray) oldArray6).peek();
+                }
+                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElem0 = null;
+                long chunkLen9 = (decoder.readMapStart());
+                if (chunkLen9 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, ((int) chunkLen9)));
+                    } else {
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapElemReuse0 = null;
+                        if (recordsArrayMapArrayElementReuseVar0 instanceof Map) {
+                            recordsArrayMapElemReuse0 = ((Map) recordsArrayMapArrayElementReuseVar0);
+                        }
+                        if (recordsArrayMapElemReuse0 != (null)) {
+                            recordsArrayMapElemReuse0 .clear();
+                            recordsArrayMapElem0 = recordsArrayMapElemReuse0;
+                        } else {
+                            recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen9 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter9 = 0; (counter9 <chunkLen9); counter9 ++) {
+                            Utf8 key2 = (decoder.readString(null));
+                            int unionIndex18 = (decoder.readIndex());
+                            if (unionIndex18 == 0) {
+                                decoder.readNull();
+                                recordsArrayMapElem0 .put(key2, null);
+                            } else {
+                                if (unionIndex18 == 1) {
+                                    recordsArrayMapElem0 .put(key2, deserializeSubRecord0(null, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsArrayMapElemValue': "+ unionIndex18));
+                                }
+                            }
+                        }
+                        chunkLen9 = (decoder.mapNext());
+                    } while (chunkLen9 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsArrayMapElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapArrayElementReuseVar0, 0));
+                    } else {
+                        recordsArrayMapElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                    }
+                }
+                recordsArrayMap0 .add(recordsArrayMapElem0);
+            }
+            chunkLen8 = (decoder.arrayNext());
+        }
+        TestRecord.put(28, recordsArrayMap0);
+    }
+
+    private void populate_TestRecord14(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArray0 = null;
+        long chunkLen10 = (decoder.readMapStart());
+        if (chunkLen10 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), ((int) chunkLen10)));
+            } else {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayReuse0 = null;
+                Object oldMap2 = TestRecord.get(29);
+                if (oldMap2 instanceof Map) {
+                    recordsMapArrayReuse0 = ((Map) oldMap2);
+                }
+                if (recordsMapArrayReuse0 != (null)) {
+                    recordsMapArrayReuse0 .clear();
+                    recordsMapArray0 = recordsMapArrayReuse0;
+                } else {
+                    recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen10 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter10 = 0; (counter10 <chunkLen10); counter10 ++) {
+                    Utf8 key3 = (decoder.readString(null));
+                    List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayValue0 = null;
+                    long chunkLen11 = (decoder.readArrayStart());
+                    if (null instanceof List) {
+                        recordsMapArrayValue0 = ((List) null);
+                        if (recordsMapArrayValue0 instanceof GenericArray) {
+                            ((GenericArray) recordsMapArrayValue0).reset();
+                        } else {
+                            recordsMapArrayValue0 .clear();
+                        }
+                    } else {
+                        recordsMapArrayValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen11));
+                    }
+                    while (chunkLen11 > 0) {
+                        for (int counter11 = 0; (counter11 <chunkLen11); counter11 ++) {
+                            Object recordsMapArrayValueArrayElementReuseVar0 = null;
+                            if (null instanceof GenericArray) {
+                                recordsMapArrayValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                            }
+                            int unionIndex19 = (decoder.readIndex());
+                            if (unionIndex19 == 0) {
+                                decoder.readNull();
+                                recordsMapArrayValue0 .add(null);
+                            } else {
+                                if (unionIndex19 == 1) {
+                                    recordsMapArrayValue0 .add(deserializeSubRecord0(recordsMapArrayValueArrayElementReuseVar0, (decoder), (customization)));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'recordsMapArrayValueElem': "+ unionIndex19));
+                                }
+                            }
+                        }
+                        chunkLen11 = (decoder.arrayNext());
+                    }
+                    recordsMapArray0 .put(key3, recordsMapArrayValue0);
+                }
+                chunkLen10 = (decoder.mapNext());
+            } while (chunkLen10 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                recordsMapArray0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(29), 0));
+            } else {
+                recordsMapArray0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+            }
+        }
+        TestRecord.put(29, recordsMapArray0);
+        int unionIndex20 = (decoder.readIndex());
+        if (unionIndex20 == 0) {
+            decoder.readNull();
+            TestRecord.put(30, null);
+        } else {
+            if (unionIndex20 == 1) {
+                List<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsArrayMapUnionOption0 = null;
+                long chunkLen12 = (decoder.readArrayStart());
+                Object oldArray7 = TestRecord.get(30);
+                if (oldArray7 instanceof List) {
+                    recordsArrayMapUnionOption0 = ((List) oldArray7);
+                    if (recordsArrayMapUnionOption0 instanceof GenericArray) {
+                        ((GenericArray) recordsArrayMapUnionOption0).reset();
+                    } else {
+                        recordsArrayMapUnionOption0 .clear();
+                    }
+                } else {
+                    recordsArrayMapUnionOption0 = new ArrayList<Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int) chunkLen12));
+                }
+                while (chunkLen12 > 0) {
+                    for (int counter12 = 0; (counter12 <chunkLen12); counter12 ++) {
+                        Object recordsArrayMapUnionOptionArrayElementReuseVar0 = null;
+                        if (oldArray7 instanceof GenericArray) {
+                            recordsArrayMapUnionOptionArrayElementReuseVar0 = ((GenericArray) oldArray7).peek();
+                        }
+                        Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElem0 = null;
+                        long chunkLen13 = (decoder.readMapStart());
+                        if (chunkLen13 > 0) {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, ((int) chunkLen13)));
+                            } else {
+                                Map<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsArrayMapUnionOptionElemReuse0 = null;
+                                if (recordsArrayMapUnionOptionArrayElementReuseVar0 instanceof Map) {
+                                    recordsArrayMapUnionOptionElemReuse0 = ((Map) recordsArrayMapUnionOptionArrayElementReuseVar0);
+                                }
+                                if (recordsArrayMapUnionOptionElemReuse0 != (null)) {
+                                    recordsArrayMapUnionOptionElemReuse0 .clear();
+                                    recordsArrayMapUnionOptionElem0 = recordsArrayMapUnionOptionElemReuse0;
+                                } else {
+                                    recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int)(((chunkLen13 * 4)+ 2)/ 3)));
+                                }
+                            }
+                            do {
+                                for (int counter13 = 0; (counter13 <chunkLen13); counter13 ++) {
+                                    Utf8 key4 = (decoder.readString(null));
+                                    int unionIndex21 = (decoder.readIndex());
+                                    if (unionIndex21 == 0) {
+                                        decoder.readNull();
+                                        recordsArrayMapUnionOptionElem0 .put(key4, null);
+                                    } else {
+                                        if (unionIndex21 == 1) {
+                                            recordsArrayMapUnionOptionElem0 .put(key4, deserializeSubRecord0(null, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnionOptionElemValue': "+ unionIndex21));
+                                        }
+                                    }
+                                }
+                                chunkLen13 = (decoder.mapNext());
+                            } while (chunkLen13 > 0);
+                        } else {
+                            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                                recordsArrayMapUnionOptionElem0 = ((Map)(customization).getNewMapOverrideFunc().apply(recordsArrayMapUnionOptionArrayElementReuseVar0, 0));
+                            } else {
+                                recordsArrayMapUnionOptionElem0 = new HashMap<Utf8, com.linkedin.avro.fastserde.generated.avro.SubRecord>(0);
+                            }
+                        }
+                        recordsArrayMapUnionOption0 .add(recordsArrayMapUnionOptionElem0);
+                    }
+                    chunkLen12 = (decoder.arrayNext());
+                }
+                TestRecord.put(30, recordsArrayMapUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsArrayMapUnion': "+ unionIndex20));
+            }
+        }
+    }
+
+    private void populate_TestRecord15(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex22 = (decoder.readIndex());
+        if (unionIndex22 == 0) {
+            decoder.readNull();
+            TestRecord.put(31, null);
+        } else {
+            if (unionIndex22 == 1) {
+                Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOption0 = null;
+                long chunkLen14 = (decoder.readMapStart());
+                if (chunkLen14 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), ((int) chunkLen14)));
+                    } else {
+                        Map<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>> recordsMapArrayUnionOptionReuse0 = null;
+                        Object oldMap3 = TestRecord.get(31);
+                        if (oldMap3 instanceof Map) {
+                            recordsMapArrayUnionOptionReuse0 = ((Map) oldMap3);
+                        }
+                        if (recordsMapArrayUnionOptionReuse0 != (null)) {
+                            recordsMapArrayUnionOptionReuse0 .clear();
+                            recordsMapArrayUnionOption0 = recordsMapArrayUnionOptionReuse0;
+                        } else {
+                            recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(((int)(((chunkLen14 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter14 = 0; (counter14 <chunkLen14); counter14 ++) {
+                            Utf8 key5 = (decoder.readString(null));
+                            List<com.linkedin.avro.fastserde.generated.avro.SubRecord> recordsMapArrayUnionOptionValue0 = null;
+                            long chunkLen15 = (decoder.readArrayStart());
+                            if (null instanceof List) {
+                                recordsMapArrayUnionOptionValue0 = ((List) null);
+                                if (recordsMapArrayUnionOptionValue0 instanceof GenericArray) {
+                                    ((GenericArray) recordsMapArrayUnionOptionValue0).reset();
+                                } else {
+                                    recordsMapArrayUnionOptionValue0 .clear();
+                                }
+                            } else {
+                                recordsMapArrayUnionOptionValue0 = new ArrayList<com.linkedin.avro.fastserde.generated.avro.SubRecord>(((int) chunkLen15));
+                            }
+                            while (chunkLen15 > 0) {
+                                for (int counter15 = 0; (counter15 <chunkLen15); counter15 ++) {
+                                    Object recordsMapArrayUnionOptionValueArrayElementReuseVar0 = null;
+                                    if (null instanceof GenericArray) {
+                                        recordsMapArrayUnionOptionValueArrayElementReuseVar0 = ((GenericArray) null).peek();
+                                    }
+                                    int unionIndex23 = (decoder.readIndex());
+                                    if (unionIndex23 == 0) {
+                                        decoder.readNull();
+                                        recordsMapArrayUnionOptionValue0 .add(null);
+                                    } else {
+                                        if (unionIndex23 == 1) {
+                                            recordsMapArrayUnionOptionValue0 .add(deserializeSubRecord0(recordsMapArrayUnionOptionValueArrayElementReuseVar0, (decoder), (customization)));
+                                        } else {
+                                            throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnionOptionValueElem': "+ unionIndex23));
+                                        }
+                                    }
+                                }
+                                chunkLen15 = (decoder.arrayNext());
+                            }
+                            recordsMapArrayUnionOption0 .put(key5, recordsMapArrayUnionOptionValue0);
+                        }
+                        chunkLen14 = (decoder.mapNext());
+                    } while (chunkLen14 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        recordsMapArrayUnionOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(TestRecord.get(31), 0));
+                    } else {
+                        recordsMapArrayUnionOption0 = new HashMap<Utf8, List<com.linkedin.avro.fastserde.generated.avro.SubRecord>>(0);
+                    }
+                }
+                TestRecord.put(31, recordsMapArrayUnionOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'recordsMapArrayUnion': "+ unionIndex22));
+            }
+        }
+        int unionIndex24 = (decoder.readIndex());
+        if (unionIndex24 == 0) {
+            decoder.readNull();
+            TestRecord.put(32, null);
+        } else {
+            if (unionIndex24 == 1) {
+                TestRecord.put(32, deserializeSubRecord0(TestRecord.get(32), (decoder), (customization)));
+            } else {
+                if (unionIndex24 == 2) {
+                    Utf8 charSequence4;
+                    Object oldString4 = TestRecord.get(32);
+                    if (oldString4 instanceof Utf8) {
+                        charSequence4 = (decoder).readString(((Utf8) oldString4));
+                    } else {
+                        charSequence4 = (decoder).readString(null);
+                    }
+                    TestRecord.put(32, charSequence4);
+                } else {
+                    if (unionIndex24 == 3) {
+                        TestRecord.put(32, (decoder.readInt()));
+                    } else {
+                        throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex24));
+                    }
+                }
+            }
+        }
+    }
+
+    private void populate_TestRecord16(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveBooleanList booleanArray0 = null;
+        long chunkLen16 = (decoder.readArrayStart());
+        Object oldArray8 = TestRecord.get(33);
+        if (oldArray8 instanceof PrimitiveBooleanList) {
+            booleanArray0 = ((PrimitiveBooleanList) oldArray8);
+            booleanArray0 .clear();
+        } else {
+            booleanArray0 = new PrimitiveBooleanArrayList(((int) chunkLen16));
+        }
+        while (chunkLen16 > 0) {
+            for (int counter16 = 0; (counter16 <chunkLen16); counter16 ++) {
+                booleanArray0 .addPrimitive((decoder.readBoolean()));
+            }
+            chunkLen16 = (decoder.arrayNext());
+        }
+        TestRecord.put(33, booleanArray0);
+        PrimitiveDoubleList doubleArray0 = null;
+        long chunkLen17 = (decoder.readArrayStart());
+        Object oldArray9 = TestRecord.get(34);
+        if (oldArray9 instanceof PrimitiveDoubleList) {
+            doubleArray0 = ((PrimitiveDoubleList) oldArray9);
+            doubleArray0 .clear();
+        } else {
+            doubleArray0 = new PrimitiveDoubleArrayList(((int) chunkLen17));
+        }
+        while (chunkLen17 > 0) {
+            for (int counter17 = 0; (counter17 <chunkLen17); counter17 ++) {
+                doubleArray0 .addPrimitive((decoder.readDouble()));
+            }
+            chunkLen17 = (decoder.arrayNext());
+        }
+        TestRecord.put(34, doubleArray0);
+    }
+
+    private void populate_TestRecord17(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveFloatList floatArray0 = null;
+        floatArray0 = ((PrimitiveFloatList) BufferBackedPrimitiveFloatList.readPrimitiveFloatArray(TestRecord.get(35), (decoder)));
+        TestRecord.put(35, floatArray0);
+        PrimitiveIntList intArray0 = null;
+        long chunkLen18 = (decoder.readArrayStart());
+        Object oldArray10 = TestRecord.get(36);
+        if (oldArray10 instanceof PrimitiveIntList) {
+            intArray0 = ((PrimitiveIntList) oldArray10);
+            intArray0 .clear();
+        } else {
+            intArray0 = new PrimitiveIntArrayList(((int) chunkLen18));
+        }
+        while (chunkLen18 > 0) {
+            for (int counter18 = 0; (counter18 <chunkLen18); counter18 ++) {
+                intArray0 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen18 = (decoder.arrayNext());
+        }
+        TestRecord.put(36, intArray0);
+    }
+
+    private void populate_TestRecord18(com.linkedin.avro.fastserde.generated.avro.TestRecord TestRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        PrimitiveLongList longArray0 = null;
+        long chunkLen19 = (decoder.readArrayStart());
+        Object oldArray11 = TestRecord.get(37);
+        if (oldArray11 instanceof PrimitiveLongList) {
+            longArray0 = ((PrimitiveLongList) oldArray11);
+            longArray0 .clear();
+        } else {
+            longArray0 = new PrimitiveLongArrayList(((int) chunkLen19));
+        }
+        while (chunkLen19 > 0) {
+            for (int counter19 = 0; (counter19 <chunkLen19); counter19 ++) {
+                longArray0 .addPrimitive((decoder.readLong()));
+            }
+            chunkLen19 = (decoder.arrayNext());
+        }
+        TestRecord.put(37, longArray0);
+        List<Utf8> stringArray0 = null;
+        long chunkLen20 = (decoder.readArrayStart());
+        Object oldArray12 = TestRecord.get(38);
+        if (oldArray12 instanceof List) {
+            stringArray0 = ((List) oldArray12);
+            if (stringArray0 instanceof GenericArray) {
+                ((GenericArray) stringArray0).reset();
+            } else {
+                stringArray0 .clear();
+            }
+        } else {
+            stringArray0 = new ArrayList<Utf8>(((int) chunkLen20));
+        }
+        while (chunkLen20 > 0) {
+            for (int counter20 = 0; (counter20 <chunkLen20); counter20 ++) {
+                Object stringArrayArrayElementReuseVar0 = null;
+                if (oldArray12 instanceof GenericArray) {
+                    stringArrayArrayElementReuseVar0 = ((GenericArray) oldArray12).peek();
+                }
+                Utf8 charSequence5;
+                if (stringArrayArrayElementReuseVar0 instanceof Utf8) {
+                    charSequence5 = (decoder).readString(((Utf8) stringArrayArrayElementReuseVar0));
+                } else {
+                    charSequence5 = (decoder).readString(null);
+                }
+                stringArray0 .add(charSequence5);
+            }
+            chunkLen20 = (decoder.arrayNext());
+        }
+        TestRecord.put(38, stringArray0);
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_1971822364_1672473580.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_1971822364_1672473580.java
new file mode 100644
index 000000000..6147d5e63
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_1971822364_1672473580.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_1971822364_1672473580
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema recordRecordSchema0;
+
+    public UNION_GenericDeserializer_1971822364_1672473580(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.recordRecordSchema0 = readerSchema.getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == recordRecordSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(recordRecordSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_2018567528_1606337179.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_2018567528_1606337179.java
new file mode 100644
index 000000000..98f9a4ecf
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_2018567528_1606337179.java
@@ -0,0 +1,68 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class UNION_GenericDeserializer_2018567528_1606337179
+    implements FastDeserializer<List<IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema arrayArraySchema0;
+    private final Schema arrayArrayElemSchema0;
+
+    public UNION_GenericDeserializer_2018567528_1606337179(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.arrayArraySchema0 = readerSchema.getTypes().get(1);
+        this.arrayArrayElemSchema0 = arrayArraySchema0 .getElementType();
+    }
+
+    public List<IndexedRecord> deserialize(List<IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> array0 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        if ((reuse) instanceof List) {
+            array0 = ((List)(reuse));
+            if (array0 instanceof GenericArray) {
+                ((GenericArray) array0).reset();
+            } else {
+                array0 .clear();
+            }
+        } else {
+            array0 = new org.apache.avro.generic.GenericData.Array<IndexedRecord>(((int) chunkLen0), arrayArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                Object arrayArrayElementReuseVar0 = null;
+                if ((reuse) instanceof GenericArray) {
+                    arrayArrayElementReuseVar0 = ((GenericArray)(reuse)).peek();
+                }
+                array0 .add(deserializerecord0(arrayArrayElementReuseVar0, (decoder), (customization)));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        return array0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == arrayArrayElemSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(arrayArrayElemSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_568621313_1223705675.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_568621313_1223705675.java
new file mode 100644
index 000000000..288914176
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UNION_GenericDeserializer_568621313_1223705675.java
@@ -0,0 +1,78 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class UNION_GenericDeserializer_568621313_1223705675
+    implements FastDeserializer<Map<Utf8, IndexedRecord>>
+{
+
+    private final Schema readerSchema;
+    private final Schema mapMapSchema0;
+    private final Schema mapMapValueSchema0;
+
+    public UNION_GenericDeserializer_568621313_1223705675(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.mapMapSchema0 = readerSchema.getTypes().get(1);
+        this.mapMapValueSchema0 = mapMapSchema0 .getValueType();
+    }
+
+    public Map<Utf8, IndexedRecord> deserialize(Map<Utf8, IndexedRecord> reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        Map<Utf8, IndexedRecord> map0 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, IndexedRecord> mapReuse0 = null;
+                if ((reuse) instanceof Map) {
+                    mapReuse0 = ((Map)(reuse));
+                }
+                if (mapReuse0 != (null)) {
+                    mapReuse0 .clear();
+                    map0 = mapReuse0;
+                } else {
+                    map0 = new HashMap<Utf8, IndexedRecord>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    map0 .put(key0, deserializerecord0(null, (decoder), (customization)));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                map0 = ((Map)(customization).getNewMapOverrideFunc().apply((reuse), 0));
+            } else {
+                map0 = new HashMap<Utf8, IndexedRecord>(0);
+            }
+        }
+        return map0;
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == mapMapValueSchema0)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(mapMapValueSchema0);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
new file mode 100644
index 000000000..2c79fd000
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV1;
+import com.linkedin.avro.fastserde.generated.avro.MyEnumV2;
+import com.linkedin.avroutil1.Enums;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+public class UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615
+    implements FastDeserializer<com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField>
+{
+
+    private final Schema readerSchema;
+
+    public UnionOfRecordsWithSameNameEnumField_SpecificDeserializer_1341667615_1341667615(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserialize(com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializeUnionOfRecordsWithSameNameEnumField0((reuse), (decoder), (customization));
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField deserializeUnionOfRecordsWithSameNameEnumField0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField UnionOfRecordsWithSameNameEnumField;
+        if ((reuse)!= null) {
+            UnionOfRecordsWithSameNameEnumField = ((com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField)(reuse));
+        } else {
+            UnionOfRecordsWithSameNameEnumField = new com.linkedin.avro.fastserde.generated.avro.UnionOfRecordsWithSameNameEnumField();
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV10(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+        } else {
+            if (unionIndex0 == 1) {
+                UnionOfRecordsWithSameNameEnumField.put(0, deserializeMyRecordV20(UnionOfRecordsWithSameNameEnumField.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+        return UnionOfRecordsWithSameNameEnumField;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV1 deserializeMyRecordV10(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV1 MyRecordV1;
+        if ((reuse)!= null) {
+            MyRecordV1 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV1)(reuse));
+        } else {
+            MyRecordV1 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV1();
+        }
+        MyRecordV1 .put(0, Enums.getConstant(MyEnumV1 .class, (decoder.readEnum())));
+        return MyRecordV1;
+    }
+
+    public com.linkedin.avro.fastserde.generated.avro.MyRecordV2 deserializeMyRecordV20(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        com.linkedin.avro.fastserde.generated.avro.MyRecordV2 MyRecordV2;
+        if ((reuse)!= null) {
+            MyRecordV2 = ((com.linkedin.avro.fastserde.generated.avro.MyRecordV2)(reuse));
+        } else {
+            MyRecordV2 = new com.linkedin.avro.fastserde.generated.avro.MyRecordV2();
+        }
+        MyRecordV2 .put(0, Enums.getConstant(MyEnumV2 .class, (decoder.readEnum())));
+        return MyRecordV2;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/recordName_GenericDeserializer_1743054079_1743054079.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/recordName_GenericDeserializer_1743054079_1743054079.java
new file mode 100644
index 000000000..5cc3ac6b0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/recordName_GenericDeserializer_1743054079_1743054079.java
@@ -0,0 +1,67 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class recordName_GenericDeserializer_1743054079_1743054079
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema unionField0;
+
+    public recordName_GenericDeserializer_1743054079_1743054079(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.unionField0 = readerSchema.getField("unionField").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecordName0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecordName0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord recordName;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            recordName = ((IndexedRecord)(reuse));
+        } else {
+            recordName = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Utf8 charSequence0;
+        Object oldString0 = recordName.get(0);
+        if (oldString0 instanceof Utf8) {
+            charSequence0 = (decoder).readString(((Utf8) oldString0));
+        } else {
+            charSequence0 = (decoder).readString(null);
+        }
+        recordName.put(0, charSequence0);
+        populate_recordName0((recordName), (customization), (decoder));
+        return recordName;
+    }
+
+    private void populate_recordName0(IndexedRecord recordName, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            decoder.readNull();
+            recordName.put(1, null);
+        } else {
+            if (unionIndex0 == 1) {
+                recordName.put(1, deserializerecordName0(recordName.get(1), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'unionField': "+ unionIndex0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1025741720_1557256887.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1025741720_1557256887.java
new file mode 100644
index 000000000..97a7aa130
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1025741720_1557256887.java
@@ -0,0 +1,96 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1025741720_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1025741720_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            int unionIndex1 = (decoder.readIndex());
+                            if (unionIndex1 == 0) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                if (unionIndex1 == 1) {
+                                    someIntsOption0 .put(key0, (decoder.readInt()));
+                                } else {
+                                    throw new RuntimeException(("Illegal union index for 'someIntsOptionValue': "+ unionIndex1));
+                                }
+                            }
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1126840752_2099305627.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1126840752_2099305627.java
new file mode 100644
index 000000000..6e431eeba
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1126840752_2099305627.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1126840752_2099305627
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1126840752_2099305627(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            if (unionIndex0 == 1) {
+                throw new AvroTypeException("Found \"string\", expecting \"int\"");
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someField': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1191367445_653449771.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1191367445_653449771.java
new file mode 100644
index 000000000..c4f0b419d
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1191367445_653449771.java
@@ -0,0 +1,69 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1191367445_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_1191367445_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    someIntsOption0 .clear();
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        someIntsOption0 .addPrimitive((decoder.readInt()));
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1373882843_1971822364.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1373882843_1971822364.java
new file mode 100644
index 000000000..8d6272679
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1373882843_1971822364.java
@@ -0,0 +1,45 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1373882843_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1373882843_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            record.put(0, (decoder.readInt()));
+        } else {
+            throw new RuntimeException(("Illegal union index for 'someInt': "+ unionIndex0));
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1556659421_711533897.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1556659421_711533897.java
new file mode 100644
index 000000000..58e33760a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1556659421_711533897.java
@@ -0,0 +1,72 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1556659421_711533897
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+
+    public record_GenericDeserializer_1556659421_711533897(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"subRecord\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"subRecord\",\"fields\":[{\"name\":\"someInt1\",\"type\":\"int\",\"doc\":\"\"},{\"name\":\"someInt2\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'subRecord': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecord0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecord0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1557256887_1025741720.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1557256887_1025741720.java
new file mode 100644
index 000000000..483d419a6
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1557256887_1025741720.java
@@ -0,0 +1,81 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_1025741720
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+    private final Schema someIntsMapValueSchema0;
+
+    public record_GenericDeserializer_1557256887_1025741720(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+        this.someIntsMapValueSchema0 = someIntsMapSchema0 .getValueType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1557256887_753570467.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1557256887_753570467.java
new file mode 100644
index 000000000..758fe3c95
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1557256887_753570467.java
@@ -0,0 +1,79 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_1557256887_753570467
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsMapSchema0;
+
+    public record_GenericDeserializer_1557256887_753570467(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsMapSchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        Map<Utf8, Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readMapStart());
+        if (chunkLen0 > 0) {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+            } else {
+                Map<Utf8, Integer> someIntsReuse0 = null;
+                Object oldMap0 = record.get(0);
+                if (oldMap0 instanceof Map) {
+                    someIntsReuse0 = ((Map) oldMap0);
+                }
+                if (someIntsReuse0 != (null)) {
+                    someIntsReuse0 .clear();
+                    someInts1 = someIntsReuse0;
+                } else {
+                    someInts1 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                }
+            }
+            do {
+                for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                    Utf8 key0 = (decoder.readString(null));
+                    someInts1 .put(key0, (decoder.readInt()));
+                }
+                chunkLen0 = (decoder.mapNext());
+            } while (chunkLen0 > 0);
+        } else {
+            if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                someInts1 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+            } else {
+                someInts1 = new HashMap<Utf8, Integer>(0);
+            }
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1672473580_1971822364.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1672473580_1971822364.java
new file mode 100644
index 000000000..d42ab1aa9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1672473580_1971822364.java
@@ -0,0 +1,50 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1672473580_1971822364
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+
+    public record_GenericDeserializer_1672473580_1971822364(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"record\",\"name\":\"record\",\"namespace\":\"com.linkedin.avro.fastserde.generated.avro\",\"doc\":\"record\",\"fields\":[{\"name\":\"someInt\",\"type\":\"int\",\"doc\":\"\"}]}");
+        } else {
+            if (unionIndex0 == 1) {
+                return deserializerecord0((reuse), (decoder), (customization));
+            } else {
+                throw new RuntimeException(("Illegal union index for 'union': "+ unionIndex0));
+            }
+        }
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1971822364_1373882843.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1971822364_1373882843.java
new file mode 100644
index 000000000..e125016b0
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_1971822364_1373882843.java
@@ -0,0 +1,42 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_1971822364_1373882843
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInt0;
+
+    public record_GenericDeserializer_1971822364_1373882843(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInt0 = readerSchema.getField("someInt").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, (decoder.readInt()));
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_653449771_1191367445.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_653449771_1191367445.java
new file mode 100644
index 000000000..ce16ee2b7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_653449771_1191367445.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_1191367445
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+
+    public record_GenericDeserializer_653449771_1191367445(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        PrimitiveIntList someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof PrimitiveIntList) {
+            someInts1 = ((PrimitiveIntList) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new PrimitiveIntArrayList(((int) chunkLen0));
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .addPrimitive((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_653449771_813379571.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_653449771_813379571.java
new file mode 100644
index 000000000..2db8e79ac
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_653449771_813379571.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_653449771_813379571
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+    private final Schema someIntsArraySchema0;
+    private final Schema someIntsArrayElemSchema0;
+
+    public record_GenericDeserializer_653449771_813379571(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+        this.someIntsArraySchema0 = someInts0 .getTypes().get(1);
+        this.someIntsArrayElemSchema0 = someIntsArraySchema0 .getElementType();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        List<Integer> someInts1 = null;
+        long chunkLen0 = (decoder.readArrayStart());
+        Object oldArray0 = record.get(0);
+        if (oldArray0 instanceof List) {
+            someInts1 = ((List) oldArray0);
+            someInts1 .clear();
+        } else {
+            someInts1 = new org.apache.avro.generic.GenericData.Array<Integer>(((int) chunkLen0), someIntsArraySchema0);
+        }
+        while (chunkLen0 > 0) {
+            for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                someInts1 .add((decoder.readInt()));
+            }
+            chunkLen0 = (decoder.arrayNext());
+        }
+        record.put(0, someInts1);
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_711533897_1556659421.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_711533897_1556659421.java
new file mode 100644
index 000000000..246bbcdd1
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_711533897_1556659421.java
@@ -0,0 +1,64 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_711533897_1556659421
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema subRecord0;
+    private final Schema subRecordRecordSchema0;
+
+    public record_GenericDeserializer_711533897_1556659421(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.subRecord0 = readerSchema.getField("subRecord").schema();
+        this.subRecordRecordSchema0 = subRecord0 .getTypes().get(1);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        record.put(0, deserializesubRecord0(record.get(0), (decoder), (customization)));
+        return record;
+    }
+
+    public IndexedRecord deserializesubRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord subRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == subRecordRecordSchema0)) {
+            subRecord = ((IndexedRecord)(reuse));
+        } else {
+            subRecord = new org.apache.avro.generic.GenericData.Record(subRecordRecordSchema0);
+        }
+        subRecord.put(0, (decoder.readInt()));
+        populate_subRecord0((subRecord), (customization), (decoder));
+        return subRecord;
+    }
+
+    private void populate_subRecord0(IndexedRecord subRecord, DatumReaderCustomization customization, Decoder decoder)
+        throws IOException
+    {
+        subRecord.put(1, (decoder.readInt()));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_753570467_1557256887.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_753570467_1557256887.java
new file mode 100644
index 000000000..e46465890
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_753570467_1557256887.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+import org.apache.avro.util.Utf8;
+
+public class record_GenericDeserializer_753570467_1557256887
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_753570467_1557256887(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"map\",\"values\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                Map<Utf8, Integer> someIntsOption0 = null;
+                long chunkLen0 = (decoder.readMapStart());
+                if (chunkLen0 > 0) {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), ((int) chunkLen0)));
+                    } else {
+                        Map<Utf8, Integer> someIntsOptionReuse0 = null;
+                        Object oldMap0 = record.get(0);
+                        if (oldMap0 instanceof Map) {
+                            someIntsOptionReuse0 = ((Map) oldMap0);
+                        }
+                        if (someIntsOptionReuse0 != (null)) {
+                            someIntsOptionReuse0 .clear();
+                            someIntsOption0 = someIntsOptionReuse0;
+                        } else {
+                            someIntsOption0 = new HashMap<Utf8, Integer>(((int)(((chunkLen0 * 4)+ 2)/ 3)));
+                        }
+                    }
+                    do {
+                        for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                            Utf8 key0 = (decoder.readString(null));
+                            someIntsOption0 .put(key0, (decoder.readInt()));
+                        }
+                        chunkLen0 = (decoder.mapNext());
+                    } while (chunkLen0 > 0);
+                } else {
+                    if (((customization)!= null)&&((customization).getNewMapOverrideFunc()!= null)) {
+                        someIntsOption0 = ((Map)(customization).getNewMapOverrideFunc().apply(record.get(0), 0));
+                    } else {
+                        someIntsOption0 = new HashMap<Utf8, Integer>(0);
+                    }
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_813379571_653449771.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_813379571_653449771.java
new file mode 100644
index 000000000..ef8ddfa88
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/record_GenericDeserializer_813379571_653449771.java
@@ -0,0 +1,87 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import com.linkedin.avro.fastserde.primitive.PrimitiveIntArrayList;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericArray;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class record_GenericDeserializer_813379571_653449771
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema someInts0;
+
+    public record_GenericDeserializer_813379571_653449771(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.someInts0 = readerSchema.getField("someInts").schema();
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializerecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializerecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            record = ((IndexedRecord)(reuse));
+        } else {
+            record = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int unionIndex0 = (decoder.readIndex());
+        if (unionIndex0 == 0) {
+            throw new AvroTypeException("Found \"null\", expecting {\"type\":\"array\",\"items\":\"int\"}");
+        } else {
+            if (unionIndex0 == 1) {
+                PrimitiveIntList someIntsOption0 = null;
+                long chunkLen0 = (decoder.readArrayStart());
+                Object oldArray0 = record.get(0);
+                if (oldArray0 instanceof PrimitiveIntList) {
+                    someIntsOption0 = ((PrimitiveIntList) oldArray0);
+                    if (someIntsOption0 instanceof GenericArray) {
+                        ((GenericArray) someIntsOption0).reset();
+                    } else {
+                        someIntsOption0 .clear();
+                    }
+                } else {
+                    someIntsOption0 = new PrimitiveIntArrayList(((int) chunkLen0));
+                }
+                while (chunkLen0 > 0) {
+                    for (int counter0 = 0; (counter0 <chunkLen0); counter0 ++) {
+                        Object someIntsOptionArrayElementReuseVar0 = null;
+                        if (oldArray0 instanceof GenericArray) {
+                            someIntsOptionArrayElementReuseVar0 = ((GenericArray) oldArray0).peek();
+                        }
+                        int unionIndex1 = (decoder.readIndex());
+                        if (unionIndex1 == 0) {
+                            someIntsOption0 .addPrimitive((decoder.readInt()));
+                        } else {
+                            if (unionIndex1 == 1) {
+                                throw new AvroTypeException("Found \"null\", expecting \"int\"");
+                            } else {
+                                throw new RuntimeException(("Illegal union index for 'someIntsOptionElem': "+ unionIndex1));
+                            }
+                        }
+                    }
+                    chunkLen0 = (decoder.arrayNext());
+                }
+                record.put(0, someIntsOption0);
+            } else {
+                throw new RuntimeException(("Illegal union index for 'someInts': "+ unionIndex0));
+            }
+        }
+        return record;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/testRecord_GenericDeserializer_1146484089_1256982207.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/testRecord_GenericDeserializer_1146484089_1256982207.java
new file mode 100644
index 000000000..9b43ba952
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/deserialization/AVRO_1_9/testRecord_GenericDeserializer_1146484089_1256982207.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.deserialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastDeserializer;
+import com.linkedin.avro.fastserde.customized.DatumReaderCustomization;
+import org.apache.avro.AvroTypeException;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Decoder;
+
+public class testRecord_GenericDeserializer_1146484089_1256982207
+    implements FastDeserializer<IndexedRecord>
+{
+
+    private final Schema readerSchema;
+    private final Schema testEnum0;
+    private final Map enumMappingtestEnum0;
+
+    public testRecord_GenericDeserializer_1146484089_1256982207(Schema readerSchema) {
+        this.readerSchema = readerSchema;
+        this.testEnum0 = readerSchema.getField("testEnum").schema();
+        HashMap tempEnumMapping0 = new HashMap(3);
+        tempEnumMapping0 .put(new Integer(0), new Integer(0));
+        tempEnumMapping0 .put(new Integer(1), new Integer(1));
+        tempEnumMapping0 .put(new Integer(2), new AvroTypeException("com.linkedin.avro.fastserde.generated.avro.testEnum: No match for C"));
+        this.enumMappingtestEnum0 = Collections.unmodifiableMap(tempEnumMapping0);
+    }
+
+    public IndexedRecord deserialize(IndexedRecord reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        return deserializetestRecord0((reuse), (decoder), (customization));
+    }
+
+    public IndexedRecord deserializetestRecord0(Object reuse, Decoder decoder, DatumReaderCustomization customization)
+        throws IOException
+    {
+        IndexedRecord testRecord;
+        if ((((reuse)!= null)&&((reuse) instanceof IndexedRecord))&&(((IndexedRecord)(reuse)).getSchema() == readerSchema)) {
+            testRecord = ((IndexedRecord)(reuse));
+        } else {
+            testRecord = new org.apache.avro.generic.GenericData.Record(readerSchema);
+        }
+        int enumIndex0 = (decoder.readEnum());
+        GenericEnumSymbol enumValue0 = null;
+        Object enumIndexLookupResult0 = enumMappingtestEnum0 .get(enumIndex0);
+        if (enumIndexLookupResult0 instanceof Integer) {
+            enumValue0 = new org.apache.avro.generic.GenericData.EnumSymbol(testEnum0, testEnum0 .getEnumSymbols().get(((Integer) enumIndexLookupResult0)));
+        } else {
+            if (enumIndexLookupResult0 instanceof AvroTypeException) {
+                throw((AvroTypeException) enumIndexLookupResult0);
+            } else {
+                throw new RuntimeException(("Illegal enum index for 'com.linkedin.avro.fastserde.generated.avro.testEnum': "+ enumIndex0));
+            }
+        }
+        testRecord.put(0, enumValue0);
+        return testRecord;
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_BOOLEAN_GenericSerializer_869749973.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_BOOLEAN_GenericSerializer_869749973.java
new file mode 100644
index 000000000..fc832b116
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_BOOLEAN_GenericSerializer_869749973.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveBooleanList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_BOOLEAN_GenericSerializer_869749973
+    implements FastSerializer<List<Boolean>>
+{
+
+
+    public void serialize(List<Boolean> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveBooleanList) {
+                PrimitiveBooleanList primitiveList0 = ((PrimitiveBooleanList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeBoolean(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_DOUBLE_GenericSerializer_18760307.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_DOUBLE_GenericSerializer_18760307.java
new file mode 100644
index 000000000..d1ba90840
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_DOUBLE_GenericSerializer_18760307.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveDoubleList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_DOUBLE_GenericSerializer_18760307
+    implements FastSerializer<List<Double>>
+{
+
+
+    public void serialize(List<Double> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveDoubleList) {
+                PrimitiveDoubleList primitiveList0 = ((PrimitiveDoubleList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeDouble(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_FLOAT_GenericSerializer_1012670397.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_FLOAT_GenericSerializer_1012670397.java
new file mode 100644
index 000000000..0c843af10
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_FLOAT_GenericSerializer_1012670397.java
@@ -0,0 +1,47 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_FLOAT_GenericSerializer_1012670397
+    implements FastSerializer<List<Float>>
+{
+
+
+    public void serialize(List<Float> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_INT_GenericSerializer_1012089072.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_INT_GenericSerializer_1012089072.java
new file mode 100644
index 000000000..b2ced19eb
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_INT_GenericSerializer_1012089072.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_INT_GenericSerializer_1012089072
+    implements FastSerializer<List<Integer>>
+{
+
+
+    public void serialize(List<Integer> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeInt(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_LONG_GenericSerializer_325099267.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_LONG_GenericSerializer_325099267.java
new file mode 100644
index 000000000..0410b1907
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_LONG_GenericSerializer_325099267.java
@@ -0,0 +1,41 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveLongList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.io.Encoder;
+
+public class Array_of_LONG_GenericSerializer_325099267
+    implements FastSerializer<List<Long>>
+{
+
+
+    public void serialize(List<Long> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            Object array0 = data;
+            if (array0 instanceof PrimitiveLongList) {
+                PrimitiveLongList primitiveList0 = ((PrimitiveLongList) array0);
+                for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(primitiveList0 .getPrimitive(counter0));
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <data.size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeLong(data.get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_UNION_GenericSerializer_777827233.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_UNION_GenericSerializer_777827233.java
new file mode 100644
index 000000000..dfc095e5c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_UNION_GenericSerializer_777827233.java
@@ -0,0 +1,61 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_UNION_GenericSerializer_777827233
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord union0 = null;
+                union0 = ((List<IndexedRecord> ) data).get(counter0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_record_GenericSerializer_477614132.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_record_GenericSerializer_477614132.java
new file mode 100644
index 000000000..af72a78a5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Array_of_record_GenericSerializer_477614132.java
@@ -0,0 +1,53 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Array_of_record_GenericSerializer_477614132
+    implements FastSerializer<List<IndexedRecord>>
+{
+
+
+    public void serialize(List<IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeArrayStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (int counter0 = 0; (counter0 <data.size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord record0 = null;
+                record0 = ((List<IndexedRecord> ) data).get(counter0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
new file mode 100644
index 000000000..d992477b7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713.java
@@ -0,0 +1,4527 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord_GenericSerializer_312360713
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        (encoder).writeInt(((Integer) data.get(2)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(3)));
+        (encoder).writeInt(((Integer) data.get(4)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(5)));
+        (encoder).writeInt(((Integer) data.get(6)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(7)));
+        (encoder).writeInt(((Integer) data.get(8)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(9)));
+        (encoder).writeInt(((Integer) data.get(10)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(11)));
+        (encoder).writeInt(((Integer) data.get(12)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(13)));
+        (encoder).writeInt(((Integer) data.get(14)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord7(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(15)));
+        (encoder).writeInt(((Integer) data.get(16)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord8(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(17)));
+        (encoder).writeInt(((Integer) data.get(18)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord9(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(19)));
+        (encoder).writeInt(((Integer) data.get(20)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(21)));
+        (encoder).writeInt(((Integer) data.get(22)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(23)));
+        (encoder).writeInt(((Integer) data.get(24)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(25)));
+        (encoder).writeInt(((Integer) data.get(26)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(27)));
+        (encoder).writeInt(((Integer) data.get(28)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(29)));
+        (encoder).writeInt(((Integer) data.get(30)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(31)));
+        (encoder).writeInt(((Integer) data.get(32)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord16(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(33)));
+        (encoder).writeInt(((Integer) data.get(34)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord17(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(35)));
+        (encoder).writeInt(((Integer) data.get(36)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord18(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(37)));
+        (encoder).writeInt(((Integer) data.get(38)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord19(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(39)));
+        (encoder).writeInt(((Integer) data.get(40)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(41)));
+        (encoder).writeInt(((Integer) data.get(42)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord21(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(43)));
+        (encoder).writeInt(((Integer) data.get(44)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord22(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(45)));
+        (encoder).writeInt(((Integer) data.get(46)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord23(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(47)));
+        (encoder).writeInt(((Integer) data.get(48)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord24(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(49)));
+        (encoder).writeInt(((Integer) data.get(50)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord25(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(51)));
+        (encoder).writeInt(((Integer) data.get(52)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord26(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(53)));
+        (encoder).writeInt(((Integer) data.get(54)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord27(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(55)));
+        (encoder).writeInt(((Integer) data.get(56)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord28(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(57)));
+        (encoder).writeInt(((Integer) data.get(58)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord29(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(59)));
+        (encoder).writeInt(((Integer) data.get(60)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord30(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(61)));
+        (encoder).writeInt(((Integer) data.get(62)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord31(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(63)));
+        (encoder).writeInt(((Integer) data.get(64)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord32(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(65)));
+        (encoder).writeInt(((Integer) data.get(66)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord33(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(67)));
+        (encoder).writeInt(((Integer) data.get(68)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord34(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(69)));
+        (encoder).writeInt(((Integer) data.get(70)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord35(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(71)));
+        (encoder).writeInt(((Integer) data.get(72)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord36(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(73)));
+        (encoder).writeInt(((Integer) data.get(74)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord37(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(75)));
+        (encoder).writeInt(((Integer) data.get(76)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord38(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(77)));
+        (encoder).writeInt(((Integer) data.get(78)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord39(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(79)));
+        (encoder).writeInt(((Integer) data.get(80)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord40(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(81)));
+        (encoder).writeInt(((Integer) data.get(82)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord41(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(83)));
+        (encoder).writeInt(((Integer) data.get(84)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord42(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(85)));
+        (encoder).writeInt(((Integer) data.get(86)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord43(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(87)));
+        (encoder).writeInt(((Integer) data.get(88)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord44(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(89)));
+        (encoder).writeInt(((Integer) data.get(90)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord45(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(91)));
+        (encoder).writeInt(((Integer) data.get(92)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord46(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(93)));
+        (encoder).writeInt(((Integer) data.get(94)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord47(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(95)));
+        (encoder).writeInt(((Integer) data.get(96)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord48(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(97)));
+        (encoder).writeInt(((Integer) data.get(98)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord49(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(99)));
+        (encoder).writeInt(((Integer) data.get(100)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord50(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(101)));
+        (encoder).writeInt(((Integer) data.get(102)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord51(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(103)));
+        (encoder).writeInt(((Integer) data.get(104)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord52(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(105)));
+        (encoder).writeInt(((Integer) data.get(106)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord53(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(107)));
+        (encoder).writeInt(((Integer) data.get(108)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord54(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(109)));
+        (encoder).writeInt(((Integer) data.get(110)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord55(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(111)));
+        (encoder).writeInt(((Integer) data.get(112)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord56(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(113)));
+        (encoder).writeInt(((Integer) data.get(114)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord57(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(115)));
+        (encoder).writeInt(((Integer) data.get(116)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord58(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(117)));
+        (encoder).writeInt(((Integer) data.get(118)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord59(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(119)));
+        (encoder).writeInt(((Integer) data.get(120)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord60(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(121)));
+        (encoder).writeInt(((Integer) data.get(122)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord61(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(123)));
+        (encoder).writeInt(((Integer) data.get(124)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord62(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(125)));
+        (encoder).writeInt(((Integer) data.get(126)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord63(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(127)));
+        (encoder).writeInt(((Integer) data.get(128)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord64(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(129)));
+        (encoder).writeInt(((Integer) data.get(130)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord65(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(131)));
+        (encoder).writeInt(((Integer) data.get(132)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord66(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(133)));
+        (encoder).writeInt(((Integer) data.get(134)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord67(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(135)));
+        (encoder).writeInt(((Integer) data.get(136)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord68(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(137)));
+        (encoder).writeInt(((Integer) data.get(138)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord69(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(139)));
+        (encoder).writeInt(((Integer) data.get(140)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord70(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(141)));
+        (encoder).writeInt(((Integer) data.get(142)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord71(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(143)));
+        (encoder).writeInt(((Integer) data.get(144)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord72(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(145)));
+        (encoder).writeInt(((Integer) data.get(146)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord73(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(147)));
+        (encoder).writeInt(((Integer) data.get(148)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord74(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(149)));
+        (encoder).writeInt(((Integer) data.get(150)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord75(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(151)));
+        (encoder).writeInt(((Integer) data.get(152)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord76(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(153)));
+        (encoder).writeInt(((Integer) data.get(154)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord77(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(155)));
+        (encoder).writeInt(((Integer) data.get(156)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord78(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(157)));
+        (encoder).writeInt(((Integer) data.get(158)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord79(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(159)));
+        (encoder).writeInt(((Integer) data.get(160)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord80(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(161)));
+        (encoder).writeInt(((Integer) data.get(162)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord81(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(163)));
+        (encoder).writeInt(((Integer) data.get(164)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord82(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(165)));
+        (encoder).writeInt(((Integer) data.get(166)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord83(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(167)));
+        (encoder).writeInt(((Integer) data.get(168)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord84(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(169)));
+        (encoder).writeInt(((Integer) data.get(170)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord85(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(171)));
+        (encoder).writeInt(((Integer) data.get(172)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord86(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(173)));
+        (encoder).writeInt(((Integer) data.get(174)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord87(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(175)));
+        (encoder).writeInt(((Integer) data.get(176)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord88(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(177)));
+        (encoder).writeInt(((Integer) data.get(178)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord89(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(179)));
+        (encoder).writeInt(((Integer) data.get(180)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord90(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(181)));
+        (encoder).writeInt(((Integer) data.get(182)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord91(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(183)));
+        (encoder).writeInt(((Integer) data.get(184)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord92(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(185)));
+        (encoder).writeInt(((Integer) data.get(186)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord93(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(187)));
+        (encoder).writeInt(((Integer) data.get(188)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord94(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(189)));
+        (encoder).writeInt(((Integer) data.get(190)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord95(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(191)));
+        (encoder).writeInt(((Integer) data.get(192)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord96(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(193)));
+        (encoder).writeInt(((Integer) data.get(194)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord97(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(195)));
+        (encoder).writeInt(((Integer) data.get(196)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord98(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(197)));
+        (encoder).writeInt(((Integer) data.get(198)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord99(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(199)));
+        (encoder).writeInt(((Integer) data.get(200)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord100(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(201)));
+        (encoder).writeInt(((Integer) data.get(202)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord101(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(203)));
+        (encoder).writeInt(((Integer) data.get(204)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord102(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(205)));
+        (encoder).writeInt(((Integer) data.get(206)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord103(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(207)));
+        (encoder).writeInt(((Integer) data.get(208)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord104(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(209)));
+        (encoder).writeInt(((Integer) data.get(210)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord105(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(211)));
+        (encoder).writeInt(((Integer) data.get(212)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord106(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(213)));
+        (encoder).writeInt(((Integer) data.get(214)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord107(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(215)));
+        (encoder).writeInt(((Integer) data.get(216)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord108(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(217)));
+        (encoder).writeInt(((Integer) data.get(218)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord109(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(219)));
+        (encoder).writeInt(((Integer) data.get(220)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord110(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(221)));
+        (encoder).writeInt(((Integer) data.get(222)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord111(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(223)));
+        (encoder).writeInt(((Integer) data.get(224)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord112(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(225)));
+        (encoder).writeInt(((Integer) data.get(226)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord113(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(227)));
+        (encoder).writeInt(((Integer) data.get(228)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord114(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(229)));
+        (encoder).writeInt(((Integer) data.get(230)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord115(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(231)));
+        (encoder).writeInt(((Integer) data.get(232)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord116(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(233)));
+        (encoder).writeInt(((Integer) data.get(234)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord117(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(235)));
+        (encoder).writeInt(((Integer) data.get(236)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord118(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(237)));
+        (encoder).writeInt(((Integer) data.get(238)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord119(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(239)));
+        (encoder).writeInt(((Integer) data.get(240)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord120(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(241)));
+        (encoder).writeInt(((Integer) data.get(242)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord121(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(243)));
+        (encoder).writeInt(((Integer) data.get(244)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord122(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(245)));
+        (encoder).writeInt(((Integer) data.get(246)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord123(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(247)));
+        (encoder).writeInt(((Integer) data.get(248)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord124(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(249)));
+        (encoder).writeInt(((Integer) data.get(250)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord125(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(251)));
+        (encoder).writeInt(((Integer) data.get(252)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord126(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(253)));
+        (encoder).writeInt(((Integer) data.get(254)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord127(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(255)));
+        (encoder).writeInt(((Integer) data.get(256)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord128(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(257)));
+        (encoder).writeInt(((Integer) data.get(258)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord129(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(259)));
+        (encoder).writeInt(((Integer) data.get(260)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord130(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(261)));
+        (encoder).writeInt(((Integer) data.get(262)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord131(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(263)));
+        (encoder).writeInt(((Integer) data.get(264)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord132(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(265)));
+        (encoder).writeInt(((Integer) data.get(266)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord133(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(267)));
+        (encoder).writeInt(((Integer) data.get(268)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord134(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(269)));
+        (encoder).writeInt(((Integer) data.get(270)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord135(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(271)));
+        (encoder).writeInt(((Integer) data.get(272)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord136(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(273)));
+        (encoder).writeInt(((Integer) data.get(274)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord137(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(275)));
+        (encoder).writeInt(((Integer) data.get(276)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord138(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(277)));
+        (encoder).writeInt(((Integer) data.get(278)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord139(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(279)));
+        (encoder).writeInt(((Integer) data.get(280)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord140(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(281)));
+        (encoder).writeInt(((Integer) data.get(282)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord141(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(283)));
+        (encoder).writeInt(((Integer) data.get(284)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord142(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(285)));
+        (encoder).writeInt(((Integer) data.get(286)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord143(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(287)));
+        (encoder).writeInt(((Integer) data.get(288)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord144(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(289)));
+        (encoder).writeInt(((Integer) data.get(290)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord145(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(291)));
+        (encoder).writeInt(((Integer) data.get(292)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord146(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(293)));
+        (encoder).writeInt(((Integer) data.get(294)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord147(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(295)));
+        (encoder).writeInt(((Integer) data.get(296)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord148(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(297)));
+        (encoder).writeInt(((Integer) data.get(298)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord149(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(299)));
+        (encoder).writeInt(((Integer) data.get(300)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord150(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(301)));
+        (encoder).writeInt(((Integer) data.get(302)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord151(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(303)));
+        (encoder).writeInt(((Integer) data.get(304)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord152(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(305)));
+        (encoder).writeInt(((Integer) data.get(306)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord153(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(307)));
+        (encoder).writeInt(((Integer) data.get(308)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord154(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(309)));
+        (encoder).writeInt(((Integer) data.get(310)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord155(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(311)));
+        (encoder).writeInt(((Integer) data.get(312)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord156(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(313)));
+        (encoder).writeInt(((Integer) data.get(314)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord157(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(315)));
+        (encoder).writeInt(((Integer) data.get(316)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord158(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(317)));
+        (encoder).writeInt(((Integer) data.get(318)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord159(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(319)));
+        (encoder).writeInt(((Integer) data.get(320)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord160(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(321)));
+        (encoder).writeInt(((Integer) data.get(322)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord161(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(323)));
+        (encoder).writeInt(((Integer) data.get(324)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord162(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(325)));
+        (encoder).writeInt(((Integer) data.get(326)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord163(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(327)));
+        (encoder).writeInt(((Integer) data.get(328)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord164(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(329)));
+        (encoder).writeInt(((Integer) data.get(330)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord165(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(331)));
+        (encoder).writeInt(((Integer) data.get(332)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord166(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(333)));
+        (encoder).writeInt(((Integer) data.get(334)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord167(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(335)));
+        (encoder).writeInt(((Integer) data.get(336)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord168(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(337)));
+        (encoder).writeInt(((Integer) data.get(338)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord169(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(339)));
+        (encoder).writeInt(((Integer) data.get(340)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord170(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(341)));
+        (encoder).writeInt(((Integer) data.get(342)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord171(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(343)));
+        (encoder).writeInt(((Integer) data.get(344)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord172(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(345)));
+        (encoder).writeInt(((Integer) data.get(346)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord173(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(347)));
+        (encoder).writeInt(((Integer) data.get(348)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord174(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(349)));
+        (encoder).writeInt(((Integer) data.get(350)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord175(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(351)));
+        (encoder).writeInt(((Integer) data.get(352)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord176(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(353)));
+        (encoder).writeInt(((Integer) data.get(354)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord177(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(355)));
+        (encoder).writeInt(((Integer) data.get(356)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord178(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(357)));
+        (encoder).writeInt(((Integer) data.get(358)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord179(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(359)));
+        (encoder).writeInt(((Integer) data.get(360)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord180(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(361)));
+        (encoder).writeInt(((Integer) data.get(362)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord181(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(363)));
+        (encoder).writeInt(((Integer) data.get(364)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord182(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(365)));
+        (encoder).writeInt(((Integer) data.get(366)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord183(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(367)));
+        (encoder).writeInt(((Integer) data.get(368)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord184(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(369)));
+        (encoder).writeInt(((Integer) data.get(370)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord185(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(371)));
+        (encoder).writeInt(((Integer) data.get(372)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord186(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(373)));
+        (encoder).writeInt(((Integer) data.get(374)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord187(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(375)));
+        (encoder).writeInt(((Integer) data.get(376)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord188(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(377)));
+        (encoder).writeInt(((Integer) data.get(378)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord189(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(379)));
+        (encoder).writeInt(((Integer) data.get(380)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord190(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(381)));
+        (encoder).writeInt(((Integer) data.get(382)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord191(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(383)));
+        (encoder).writeInt(((Integer) data.get(384)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord192(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(385)));
+        (encoder).writeInt(((Integer) data.get(386)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord193(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(387)));
+        (encoder).writeInt(((Integer) data.get(388)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord194(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(389)));
+        (encoder).writeInt(((Integer) data.get(390)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord195(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(391)));
+        (encoder).writeInt(((Integer) data.get(392)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord196(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(393)));
+        (encoder).writeInt(((Integer) data.get(394)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord197(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(395)));
+        (encoder).writeInt(((Integer) data.get(396)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord198(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(397)));
+        (encoder).writeInt(((Integer) data.get(398)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord199(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(399)));
+        (encoder).writeInt(((Integer) data.get(400)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord200(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(401)));
+        (encoder).writeInt(((Integer) data.get(402)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord201(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(403)));
+        (encoder).writeInt(((Integer) data.get(404)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord202(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(405)));
+        (encoder).writeInt(((Integer) data.get(406)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord203(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(407)));
+        (encoder).writeInt(((Integer) data.get(408)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord204(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(409)));
+        (encoder).writeInt(((Integer) data.get(410)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord205(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(411)));
+        (encoder).writeInt(((Integer) data.get(412)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord206(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(413)));
+        (encoder).writeInt(((Integer) data.get(414)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord207(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(415)));
+        (encoder).writeInt(((Integer) data.get(416)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord208(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(417)));
+        (encoder).writeInt(((Integer) data.get(418)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord209(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(419)));
+        (encoder).writeInt(((Integer) data.get(420)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord210(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(421)));
+        (encoder).writeInt(((Integer) data.get(422)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord211(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(423)));
+        (encoder).writeInt(((Integer) data.get(424)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord212(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(425)));
+        (encoder).writeInt(((Integer) data.get(426)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord213(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(427)));
+        (encoder).writeInt(((Integer) data.get(428)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord214(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(429)));
+        (encoder).writeInt(((Integer) data.get(430)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord215(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(431)));
+        (encoder).writeInt(((Integer) data.get(432)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord216(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(433)));
+        (encoder).writeInt(((Integer) data.get(434)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord217(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(435)));
+        (encoder).writeInt(((Integer) data.get(436)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord218(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(437)));
+        (encoder).writeInt(((Integer) data.get(438)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord219(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(439)));
+        (encoder).writeInt(((Integer) data.get(440)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord220(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(441)));
+        (encoder).writeInt(((Integer) data.get(442)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord221(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(443)));
+        (encoder).writeInt(((Integer) data.get(444)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord222(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(445)));
+        (encoder).writeInt(((Integer) data.get(446)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord223(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(447)));
+        (encoder).writeInt(((Integer) data.get(448)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord224(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(449)));
+        (encoder).writeInt(((Integer) data.get(450)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord225(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(451)));
+        (encoder).writeInt(((Integer) data.get(452)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord226(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(453)));
+        (encoder).writeInt(((Integer) data.get(454)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord227(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(455)));
+        (encoder).writeInt(((Integer) data.get(456)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord228(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(457)));
+        (encoder).writeInt(((Integer) data.get(458)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord229(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(459)));
+        (encoder).writeInt(((Integer) data.get(460)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord230(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(461)));
+        (encoder).writeInt(((Integer) data.get(462)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord231(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(463)));
+        (encoder).writeInt(((Integer) data.get(464)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord232(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(465)));
+        (encoder).writeInt(((Integer) data.get(466)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord233(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(467)));
+        (encoder).writeInt(((Integer) data.get(468)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord234(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(469)));
+        (encoder).writeInt(((Integer) data.get(470)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord235(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(471)));
+        (encoder).writeInt(((Integer) data.get(472)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord236(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(473)));
+        (encoder).writeInt(((Integer) data.get(474)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord237(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(475)));
+        (encoder).writeInt(((Integer) data.get(476)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord238(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(477)));
+        (encoder).writeInt(((Integer) data.get(478)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord239(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(479)));
+        (encoder).writeInt(((Integer) data.get(480)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord240(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(481)));
+        (encoder).writeInt(((Integer) data.get(482)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord241(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(483)));
+        (encoder).writeInt(((Integer) data.get(484)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord242(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(485)));
+        (encoder).writeInt(((Integer) data.get(486)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord243(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(487)));
+        (encoder).writeInt(((Integer) data.get(488)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord244(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(489)));
+        (encoder).writeInt(((Integer) data.get(490)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord245(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(491)));
+        (encoder).writeInt(((Integer) data.get(492)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord246(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(493)));
+        (encoder).writeInt(((Integer) data.get(494)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord247(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(495)));
+        (encoder).writeInt(((Integer) data.get(496)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord248(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(497)));
+        (encoder).writeInt(((Integer) data.get(498)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord249(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(499)));
+        (encoder).writeInt(((Integer) data.get(500)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord250(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(501)));
+        (encoder).writeInt(((Integer) data.get(502)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord251(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(503)));
+        (encoder).writeInt(((Integer) data.get(504)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord252(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(505)));
+        (encoder).writeInt(((Integer) data.get(506)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord253(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(507)));
+        (encoder).writeInt(((Integer) data.get(508)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord254(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(509)));
+        (encoder).writeInt(((Integer) data.get(510)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord255(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(511)));
+        (encoder).writeInt(((Integer) data.get(512)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord256(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(513)));
+        (encoder).writeInt(((Integer) data.get(514)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord257(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(515)));
+        (encoder).writeInt(((Integer) data.get(516)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord258(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(517)));
+        (encoder).writeInt(((Integer) data.get(518)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord259(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(519)));
+        (encoder).writeInt(((Integer) data.get(520)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord260(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(521)));
+        (encoder).writeInt(((Integer) data.get(522)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord261(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(523)));
+        (encoder).writeInt(((Integer) data.get(524)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord262(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(525)));
+        (encoder).writeInt(((Integer) data.get(526)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord263(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(527)));
+        (encoder).writeInt(((Integer) data.get(528)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord264(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(529)));
+        (encoder).writeInt(((Integer) data.get(530)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord265(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(531)));
+        (encoder).writeInt(((Integer) data.get(532)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord266(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(533)));
+        (encoder).writeInt(((Integer) data.get(534)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord267(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(535)));
+        (encoder).writeInt(((Integer) data.get(536)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord268(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(537)));
+        (encoder).writeInt(((Integer) data.get(538)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord269(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(539)));
+        (encoder).writeInt(((Integer) data.get(540)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord270(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(541)));
+        (encoder).writeInt(((Integer) data.get(542)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord271(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(543)));
+        (encoder).writeInt(((Integer) data.get(544)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord272(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(545)));
+        (encoder).writeInt(((Integer) data.get(546)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord273(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(547)));
+        (encoder).writeInt(((Integer) data.get(548)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord274(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(549)));
+        (encoder).writeInt(((Integer) data.get(550)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord275(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(551)));
+        (encoder).writeInt(((Integer) data.get(552)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord276(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(553)));
+        (encoder).writeInt(((Integer) data.get(554)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord277(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(555)));
+        (encoder).writeInt(((Integer) data.get(556)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord278(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(557)));
+        (encoder).writeInt(((Integer) data.get(558)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord279(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(559)));
+        (encoder).writeInt(((Integer) data.get(560)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord280(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(561)));
+        (encoder).writeInt(((Integer) data.get(562)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord281(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(563)));
+        (encoder).writeInt(((Integer) data.get(564)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord282(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(565)));
+        (encoder).writeInt(((Integer) data.get(566)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord283(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(567)));
+        (encoder).writeInt(((Integer) data.get(568)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord284(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(569)));
+        (encoder).writeInt(((Integer) data.get(570)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord285(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(571)));
+        (encoder).writeInt(((Integer) data.get(572)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord286(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(573)));
+        (encoder).writeInt(((Integer) data.get(574)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord287(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(575)));
+        (encoder).writeInt(((Integer) data.get(576)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord288(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(577)));
+        (encoder).writeInt(((Integer) data.get(578)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord289(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(579)));
+        (encoder).writeInt(((Integer) data.get(580)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord290(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(581)));
+        (encoder).writeInt(((Integer) data.get(582)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord291(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(583)));
+        (encoder).writeInt(((Integer) data.get(584)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord292(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(585)));
+        (encoder).writeInt(((Integer) data.get(586)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord293(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(587)));
+        (encoder).writeInt(((Integer) data.get(588)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord294(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(589)));
+        (encoder).writeInt(((Integer) data.get(590)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord295(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(591)));
+        (encoder).writeInt(((Integer) data.get(592)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord296(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(593)));
+        (encoder).writeInt(((Integer) data.get(594)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord297(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(595)));
+        (encoder).writeInt(((Integer) data.get(596)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord298(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(597)));
+        (encoder).writeInt(((Integer) data.get(598)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord299(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(599)));
+        (encoder).writeInt(((Integer) data.get(600)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord300(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(601)));
+        (encoder).writeInt(((Integer) data.get(602)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord301(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(603)));
+        (encoder).writeInt(((Integer) data.get(604)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord302(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(605)));
+        (encoder).writeInt(((Integer) data.get(606)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord303(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(607)));
+        (encoder).writeInt(((Integer) data.get(608)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord304(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(609)));
+        (encoder).writeInt(((Integer) data.get(610)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord305(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(611)));
+        (encoder).writeInt(((Integer) data.get(612)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord306(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(613)));
+        (encoder).writeInt(((Integer) data.get(614)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord307(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(615)));
+        (encoder).writeInt(((Integer) data.get(616)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord308(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(617)));
+        (encoder).writeInt(((Integer) data.get(618)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord309(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(619)));
+        (encoder).writeInt(((Integer) data.get(620)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord310(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(621)));
+        (encoder).writeInt(((Integer) data.get(622)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord311(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(623)));
+        (encoder).writeInt(((Integer) data.get(624)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord312(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(625)));
+        (encoder).writeInt(((Integer) data.get(626)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord313(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(627)));
+        (encoder).writeInt(((Integer) data.get(628)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord314(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(629)));
+        (encoder).writeInt(((Integer) data.get(630)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord315(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(631)));
+        (encoder).writeInt(((Integer) data.get(632)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord316(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(633)));
+        (encoder).writeInt(((Integer) data.get(634)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord317(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(635)));
+        (encoder).writeInt(((Integer) data.get(636)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord318(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(637)));
+        (encoder).writeInt(((Integer) data.get(638)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord319(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(639)));
+        (encoder).writeInt(((Integer) data.get(640)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord320(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(641)));
+        (encoder).writeInt(((Integer) data.get(642)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord321(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(643)));
+        (encoder).writeInt(((Integer) data.get(644)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord322(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(645)));
+        (encoder).writeInt(((Integer) data.get(646)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord323(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(647)));
+        (encoder).writeInt(((Integer) data.get(648)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord324(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(649)));
+        (encoder).writeInt(((Integer) data.get(650)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord325(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(651)));
+        (encoder).writeInt(((Integer) data.get(652)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord326(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(653)));
+        (encoder).writeInt(((Integer) data.get(654)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord327(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(655)));
+        (encoder).writeInt(((Integer) data.get(656)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord328(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(657)));
+        (encoder).writeInt(((Integer) data.get(658)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord329(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(659)));
+        (encoder).writeInt(((Integer) data.get(660)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord330(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(661)));
+        (encoder).writeInt(((Integer) data.get(662)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord331(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(663)));
+        (encoder).writeInt(((Integer) data.get(664)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord332(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(665)));
+        (encoder).writeInt(((Integer) data.get(666)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord333(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(667)));
+        (encoder).writeInt(((Integer) data.get(668)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord334(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(669)));
+        (encoder).writeInt(((Integer) data.get(670)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord335(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(671)));
+        (encoder).writeInt(((Integer) data.get(672)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord336(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(673)));
+        (encoder).writeInt(((Integer) data.get(674)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord337(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(675)));
+        (encoder).writeInt(((Integer) data.get(676)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord338(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(677)));
+        (encoder).writeInt(((Integer) data.get(678)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord339(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(679)));
+        (encoder).writeInt(((Integer) data.get(680)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord340(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(681)));
+        (encoder).writeInt(((Integer) data.get(682)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord341(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(683)));
+        (encoder).writeInt(((Integer) data.get(684)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord342(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(685)));
+        (encoder).writeInt(((Integer) data.get(686)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord343(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(687)));
+        (encoder).writeInt(((Integer) data.get(688)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord344(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(689)));
+        (encoder).writeInt(((Integer) data.get(690)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord345(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(691)));
+        (encoder).writeInt(((Integer) data.get(692)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord346(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(693)));
+        (encoder).writeInt(((Integer) data.get(694)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord347(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(695)));
+        (encoder).writeInt(((Integer) data.get(696)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord348(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(697)));
+        (encoder).writeInt(((Integer) data.get(698)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord349(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(699)));
+        (encoder).writeInt(((Integer) data.get(700)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord350(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(701)));
+        (encoder).writeInt(((Integer) data.get(702)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord351(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(703)));
+        (encoder).writeInt(((Integer) data.get(704)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord352(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(705)));
+        (encoder).writeInt(((Integer) data.get(706)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord353(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(707)));
+        (encoder).writeInt(((Integer) data.get(708)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord354(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(709)));
+        (encoder).writeInt(((Integer) data.get(710)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord355(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(711)));
+        (encoder).writeInt(((Integer) data.get(712)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord356(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(713)));
+        (encoder).writeInt(((Integer) data.get(714)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord357(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(715)));
+        (encoder).writeInt(((Integer) data.get(716)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord358(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(717)));
+        (encoder).writeInt(((Integer) data.get(718)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord359(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(719)));
+        (encoder).writeInt(((Integer) data.get(720)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord360(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(721)));
+        (encoder).writeInt(((Integer) data.get(722)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord361(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(723)));
+        (encoder).writeInt(((Integer) data.get(724)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord362(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(725)));
+        (encoder).writeInt(((Integer) data.get(726)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord363(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(727)));
+        (encoder).writeInt(((Integer) data.get(728)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord364(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(729)));
+        (encoder).writeInt(((Integer) data.get(730)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord365(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(731)));
+        (encoder).writeInt(((Integer) data.get(732)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord366(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(733)));
+        (encoder).writeInt(((Integer) data.get(734)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord367(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(735)));
+        (encoder).writeInt(((Integer) data.get(736)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord368(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(737)));
+        (encoder).writeInt(((Integer) data.get(738)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord369(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(739)));
+        (encoder).writeInt(((Integer) data.get(740)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord370(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(741)));
+        (encoder).writeInt(((Integer) data.get(742)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord371(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(743)));
+        (encoder).writeInt(((Integer) data.get(744)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord372(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(745)));
+        (encoder).writeInt(((Integer) data.get(746)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord373(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(747)));
+        (encoder).writeInt(((Integer) data.get(748)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord374(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(749)));
+        (encoder).writeInt(((Integer) data.get(750)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord375(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(751)));
+        (encoder).writeInt(((Integer) data.get(752)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord376(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(753)));
+        (encoder).writeInt(((Integer) data.get(754)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord377(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(755)));
+        (encoder).writeInt(((Integer) data.get(756)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord378(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(757)));
+        (encoder).writeInt(((Integer) data.get(758)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord379(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(759)));
+        (encoder).writeInt(((Integer) data.get(760)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord380(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(761)));
+        (encoder).writeInt(((Integer) data.get(762)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord381(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(763)));
+        (encoder).writeInt(((Integer) data.get(764)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord382(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(765)));
+        (encoder).writeInt(((Integer) data.get(766)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord383(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(767)));
+        (encoder).writeInt(((Integer) data.get(768)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord384(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(769)));
+        (encoder).writeInt(((Integer) data.get(770)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord385(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(771)));
+        (encoder).writeInt(((Integer) data.get(772)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord386(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(773)));
+        (encoder).writeInt(((Integer) data.get(774)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord387(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(775)));
+        (encoder).writeInt(((Integer) data.get(776)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord388(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(777)));
+        (encoder).writeInt(((Integer) data.get(778)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord389(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(779)));
+        (encoder).writeInt(((Integer) data.get(780)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord390(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(781)));
+        (encoder).writeInt(((Integer) data.get(782)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord391(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(783)));
+        (encoder).writeInt(((Integer) data.get(784)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord392(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(785)));
+        (encoder).writeInt(((Integer) data.get(786)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord393(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(787)));
+        (encoder).writeInt(((Integer) data.get(788)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord394(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(789)));
+        (encoder).writeInt(((Integer) data.get(790)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord395(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(791)));
+        (encoder).writeInt(((Integer) data.get(792)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord396(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(793)));
+        (encoder).writeInt(((Integer) data.get(794)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord397(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(795)));
+        (encoder).writeInt(((Integer) data.get(796)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord398(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(797)));
+        (encoder).writeInt(((Integer) data.get(798)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord399(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(799)));
+        (encoder).writeInt(((Integer) data.get(800)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord400(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(801)));
+        (encoder).writeInt(((Integer) data.get(802)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord401(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(803)));
+        (encoder).writeInt(((Integer) data.get(804)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord402(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(805)));
+        (encoder).writeInt(((Integer) data.get(806)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord403(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(807)));
+        (encoder).writeInt(((Integer) data.get(808)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord404(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(809)));
+        (encoder).writeInt(((Integer) data.get(810)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord405(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(811)));
+        (encoder).writeInt(((Integer) data.get(812)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord406(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(813)));
+        (encoder).writeInt(((Integer) data.get(814)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord407(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(815)));
+        (encoder).writeInt(((Integer) data.get(816)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord408(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(817)));
+        (encoder).writeInt(((Integer) data.get(818)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord409(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(819)));
+        (encoder).writeInt(((Integer) data.get(820)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord410(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(821)));
+        (encoder).writeInt(((Integer) data.get(822)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord411(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(823)));
+        (encoder).writeInt(((Integer) data.get(824)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord412(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(825)));
+        (encoder).writeInt(((Integer) data.get(826)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord413(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(827)));
+        (encoder).writeInt(((Integer) data.get(828)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord414(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(829)));
+        (encoder).writeInt(((Integer) data.get(830)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord415(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(831)));
+        (encoder).writeInt(((Integer) data.get(832)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord416(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(833)));
+        (encoder).writeInt(((Integer) data.get(834)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord417(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(835)));
+        (encoder).writeInt(((Integer) data.get(836)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord418(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(837)));
+        (encoder).writeInt(((Integer) data.get(838)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord419(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(839)));
+        (encoder).writeInt(((Integer) data.get(840)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord420(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(841)));
+        (encoder).writeInt(((Integer) data.get(842)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord421(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(843)));
+        (encoder).writeInt(((Integer) data.get(844)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord422(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(845)));
+        (encoder).writeInt(((Integer) data.get(846)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord423(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(847)));
+        (encoder).writeInt(((Integer) data.get(848)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord424(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(849)));
+        (encoder).writeInt(((Integer) data.get(850)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord425(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(851)));
+        (encoder).writeInt(((Integer) data.get(852)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord426(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(853)));
+        (encoder).writeInt(((Integer) data.get(854)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord427(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(855)));
+        (encoder).writeInt(((Integer) data.get(856)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord428(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(857)));
+        (encoder).writeInt(((Integer) data.get(858)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord429(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(859)));
+        (encoder).writeInt(((Integer) data.get(860)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord430(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(861)));
+        (encoder).writeInt(((Integer) data.get(862)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord431(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(863)));
+        (encoder).writeInt(((Integer) data.get(864)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord432(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(865)));
+        (encoder).writeInt(((Integer) data.get(866)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord433(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(867)));
+        (encoder).writeInt(((Integer) data.get(868)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord434(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(869)));
+        (encoder).writeInt(((Integer) data.get(870)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord435(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(871)));
+        (encoder).writeInt(((Integer) data.get(872)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord436(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(873)));
+        (encoder).writeInt(((Integer) data.get(874)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord437(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(875)));
+        (encoder).writeInt(((Integer) data.get(876)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord438(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(877)));
+        (encoder).writeInt(((Integer) data.get(878)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord439(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(879)));
+        (encoder).writeInt(((Integer) data.get(880)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord440(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(881)));
+        (encoder).writeInt(((Integer) data.get(882)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord441(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(883)));
+        (encoder).writeInt(((Integer) data.get(884)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord442(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(885)));
+        (encoder).writeInt(((Integer) data.get(886)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord443(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(887)));
+        (encoder).writeInt(((Integer) data.get(888)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord444(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(889)));
+        (encoder).writeInt(((Integer) data.get(890)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord445(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(891)));
+        (encoder).writeInt(((Integer) data.get(892)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord446(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(893)));
+        (encoder).writeInt(((Integer) data.get(894)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord447(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(895)));
+        (encoder).writeInt(((Integer) data.get(896)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord448(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(897)));
+        (encoder).writeInt(((Integer) data.get(898)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord449(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(899)));
+        (encoder).writeInt(((Integer) data.get(900)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord450(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(901)));
+        (encoder).writeInt(((Integer) data.get(902)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord451(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(903)));
+        (encoder).writeInt(((Integer) data.get(904)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord452(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(905)));
+        (encoder).writeInt(((Integer) data.get(906)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord453(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(907)));
+        (encoder).writeInt(((Integer) data.get(908)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord454(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(909)));
+        (encoder).writeInt(((Integer) data.get(910)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord455(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(911)));
+        (encoder).writeInt(((Integer) data.get(912)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord456(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(913)));
+        (encoder).writeInt(((Integer) data.get(914)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord457(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(915)));
+        (encoder).writeInt(((Integer) data.get(916)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord458(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(917)));
+        (encoder).writeInt(((Integer) data.get(918)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord459(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(919)));
+        (encoder).writeInt(((Integer) data.get(920)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord460(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(921)));
+        (encoder).writeInt(((Integer) data.get(922)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord461(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(923)));
+        (encoder).writeInt(((Integer) data.get(924)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord462(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(925)));
+        (encoder).writeInt(((Integer) data.get(926)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord463(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(927)));
+        (encoder).writeInt(((Integer) data.get(928)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord464(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(929)));
+        (encoder).writeInt(((Integer) data.get(930)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord465(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(931)));
+        (encoder).writeInt(((Integer) data.get(932)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord466(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(933)));
+        (encoder).writeInt(((Integer) data.get(934)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord467(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(935)));
+        (encoder).writeInt(((Integer) data.get(936)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord468(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(937)));
+        (encoder).writeInt(((Integer) data.get(938)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord469(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(939)));
+        (encoder).writeInt(((Integer) data.get(940)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord470(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(941)));
+        (encoder).writeInt(((Integer) data.get(942)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord471(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(943)));
+        (encoder).writeInt(((Integer) data.get(944)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord472(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(945)));
+        (encoder).writeInt(((Integer) data.get(946)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord473(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(947)));
+        (encoder).writeInt(((Integer) data.get(948)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord474(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(949)));
+        (encoder).writeInt(((Integer) data.get(950)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord475(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(951)));
+        (encoder).writeInt(((Integer) data.get(952)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord476(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(953)));
+        (encoder).writeInt(((Integer) data.get(954)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord477(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(955)));
+        (encoder).writeInt(((Integer) data.get(956)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord478(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(957)));
+        (encoder).writeInt(((Integer) data.get(958)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord479(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(959)));
+        (encoder).writeInt(((Integer) data.get(960)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord480(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(961)));
+        (encoder).writeInt(((Integer) data.get(962)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord481(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(963)));
+        (encoder).writeInt(((Integer) data.get(964)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord482(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(965)));
+        (encoder).writeInt(((Integer) data.get(966)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord483(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(967)));
+        (encoder).writeInt(((Integer) data.get(968)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord484(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(969)));
+        (encoder).writeInt(((Integer) data.get(970)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord485(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(971)));
+        (encoder).writeInt(((Integer) data.get(972)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord486(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(973)));
+        (encoder).writeInt(((Integer) data.get(974)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord487(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(975)));
+        (encoder).writeInt(((Integer) data.get(976)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord488(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(977)));
+        (encoder).writeInt(((Integer) data.get(978)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord489(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(979)));
+        (encoder).writeInt(((Integer) data.get(980)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord490(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(981)));
+        (encoder).writeInt(((Integer) data.get(982)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord491(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(983)));
+        (encoder).writeInt(((Integer) data.get(984)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord492(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(985)));
+        (encoder).writeInt(((Integer) data.get(986)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord493(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(987)));
+        (encoder).writeInt(((Integer) data.get(988)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord494(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(989)));
+        (encoder).writeInt(((Integer) data.get(990)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord495(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(991)));
+        (encoder).writeInt(((Integer) data.get(992)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord496(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(993)));
+        (encoder).writeInt(((Integer) data.get(994)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord497(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(995)));
+        (encoder).writeInt(((Integer) data.get(996)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord498(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(997)));
+        (encoder).writeInt(((Integer) data.get(998)));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldSerializeLargeRecord499(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(999)));
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
new file mode 100644
index 000000000..75dda92e2
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239.java
@@ -0,0 +1,116 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums_GenericSerializer_496788239
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericEnumSymbol testEnumUnion0 = ((GenericEnumSymbol) data.get(1));
+        if (testEnumUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testEnumUnion0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) testEnumUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                int valueToWrite1;
+                Object enumValue1 = testEnumUnion0;
+                if (enumValue1 instanceof Enum) {
+                    valueToWrite1 = ((Enum) enumValue1).ordinal();
+                } else {
+                    valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                }
+                (encoder).writeEnum(valueToWrite1);
+            }
+        }
+        List<GenericEnumSymbol> testEnumArray0 = ((List<GenericEnumSymbol> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testEnumArray0 == null)||testEnumArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumArray0 .size());
+            for (int counter0 = 0; (counter0 <testEnumArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                int valueToWrite2;
+                Object enumValue2 = testEnumArray0 .get(counter0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithEnums1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> testEnumUnionArray0 = ((List<GenericEnumSymbol> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testEnumUnionArray0 == null)||testEnumUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testEnumUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testEnumUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericEnumSymbol union0 = null;
+                union0 = ((List<GenericEnumSymbol> ) testEnumUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericEnumSymbol)&&"com.linkedin.avro.fastserde.generated.avro.testEnum".equals(((GenericEnumSymbol) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        int valueToWrite3;
+                        Object enumValue3 = union0;
+                        if (enumValue3 instanceof Enum) {
+                            valueToWrite3 = ((Enum) enumValue3).ordinal();
+                        } else {
+                            valueToWrite3 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue3).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite3);
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
new file mode 100644
index 000000000..a5a104b23
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146.java
@@ -0,0 +1,88 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed_GenericSerializer_1473954146
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        GenericFixed testFixedUnion0 = ((GenericFixed) data.get(1));
+        if (testFixedUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((testFixedUnion0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) testFixedUnion0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                (encoder).writeFixed(((GenericFixed) testFixedUnion0).bytes());
+            }
+        }
+        List<GenericFixed> testFixedArray0 = ((List<GenericFixed> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testFixedArray0 == null)||testFixedArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedArray0 .size());
+            for (int counter0 = 0; (counter0 <testFixedArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeFixed(((GenericFixed) testFixedArray0 .get(counter0)).bytes());
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteGenericRecordWithFixed1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> testFixedUnionArray0 = ((List<GenericFixed> ) data.get(3));
+        (encoder).writeArrayStart();
+        if ((testFixedUnionArray0 == null)||testFixedUnionArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testFixedUnionArray0 .size());
+            for (int counter1 = 0; (counter1 <testFixedUnionArray0 .size()); counter1 ++) {
+                (encoder).startItem();
+                GenericFixed union0 = null;
+                union0 = ((List<GenericFixed> ) testFixedUnionArray0).get(counter1);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof GenericFixed)&&"com.linkedin.avro.fastserde.generated.avro.testFixed".equals(((GenericFixed) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeFixed(((GenericFixed) union0).bytes());
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
new file mode 100644
index 000000000..c0d52b27a
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050.java
@@ -0,0 +1,70 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion_GenericSerializer_1076995050
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteMultipleChoiceUnion0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union0 = ((Object) data.get(0));
+        if (union0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+            } else {
+                if (union0 instanceof CharSequence) {
+                    (encoder).writeIndex(2);
+                    if (((CharSequence) union0) instanceof Utf8) {
+                        (encoder).writeString(((Utf8)((CharSequence) union0)));
+                    } else {
+                        (encoder).writeString(((CharSequence) union0).toString());
+                    }
+                } else {
+                    if (union0 instanceof Integer) {
+                        (encoder).writeIndex(3);
+                        (encoder).writeInt(((Integer) union0));
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
new file mode 100644
index 000000000..d35a71b2f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553.java
@@ -0,0 +1,157 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWritePrimitives_GenericSerializer_538850553
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Integer testIntUnion0 = ((Integer) data.get(1));
+        if (testIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeInt(((Integer) testIntUnion0));
+        }
+        Integer testFlippedIntUnion0 = ((Integer) data.get(2));
+        if (testFlippedIntUnion0 == null) {
+            (encoder).writeIndex(1);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(0);
+            (encoder).writeInt(((Integer) testFlippedIntUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(3)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(3))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(3)).toString());
+        }
+        CharSequence testStringUnion0 = ((CharSequence) data.get(4));
+        if (testStringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testStringUnion0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testStringUnion0)));
+            } else {
+                (encoder).writeString(((CharSequence) testStringUnion0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives2(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(5)));
+        Long testLongUnion0 = ((Long) data.get(6));
+        if (testLongUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) testLongUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives3(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeDouble(((Double) data.get(7)));
+        Double testDoubleUnion0 = ((Double) data.get(8));
+        if (testDoubleUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeDouble(((Double) testDoubleUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives4(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFloat(((Float) data.get(9)));
+        Float testFloatUnion0 = ((Float) data.get(10));
+        if (testFloatUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeFloat(((Float) testFloatUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives5(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBoolean(((Boolean) data.get(11)));
+        Boolean testBooleanUnion0 = ((Boolean) data.get(12));
+        if (testBooleanUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBoolean(((Boolean) testBooleanUnion0));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWritePrimitives6(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeBytes(((ByteBuffer) data.get(13)));
+        ByteBuffer testBytesUnion0 = ((ByteBuffer) data.get(14));
+        if (testBytesUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeBytes(((ByteBuffer) testBytesUnion0));
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
new file mode 100644
index 000000000..5995738cc
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex_GenericSerializer_31578414
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteRightUnionIndex0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object union_field0 = ((Object) data.get(0));
+        if (union_field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record1".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeRecord10(((IndexedRecord) union_field0), (encoder), (customization));
+            } else {
+                if ((union_field0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record2".equals(((IndexedRecord) union_field0).getSchema().getFullName())) {
+                    (encoder).writeIndex(2);
+                    serializeRecord20(((IndexedRecord) union_field0), (encoder), (customization));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord20(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
new file mode 100644
index 000000000..102fe730f
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347.java
@@ -0,0 +1,158 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField_GenericSerializer_1348736347
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<IndexedRecord> recordsArray0 = ((List<IndexedRecord> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArray0 == null)||recordsArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArray0 .size());
+            for (int counter0 = 0; (counter0 <recordsArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                IndexedRecord subRecord0 = null;
+                subRecord0 = ((List<IndexedRecord> ) recordsArray0).get(counter0);
+                serializeSubRecord0(subRecord0, (encoder), (customization));
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMap0 = ((Map<CharSequence, IndexedRecord> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMap0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMap0 == null)||recordsMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) recordsMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord subRecord1 = null;
+                subRecord1 = ((Map<CharSequence, IndexedRecord> ) recordsMap0).get(key0);
+                serializeSubRecord0(subRecord1, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+        List<IndexedRecord> recordsArrayUnion0 = ((List<IndexedRecord> ) data.get(2));
+        if (recordsArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<IndexedRecord> ) recordsArrayUnion0) == null)||((List<IndexedRecord> ) recordsArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<IndexedRecord> ) recordsArrayUnion0).size());
+                    for (int counter1 = 0; (counter1 <((List<IndexedRecord> ) recordsArrayUnion0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union0 = null;
+                        union0 = ((List<IndexedRecord> )((List<IndexedRecord> ) recordsArrayUnion0)).get(counter1);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, IndexedRecord> recordsMapUnion0 = ((Map<CharSequence, IndexedRecord> ) data.get(3));
+        if (recordsMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, IndexedRecord> ) recordsMapUnion0) == null)||((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, IndexedRecord> ) recordsMapUnion0).size());
+                    for (CharSequence key1 : ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key1);
+                        IndexedRecord union1 = null;
+                        union1 = ((Map<CharSequence, IndexedRecord> )((Map<CharSequence, IndexedRecord> ) recordsMapUnion0)).get(key1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
new file mode 100644
index 000000000..169a3c821
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373.java
@@ -0,0 +1,230 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField_GenericSerializer_1813582373
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMap0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((recordsArrayMap0 == null)||recordsArrayMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsArrayMap0 .size());
+            for (int counter0 = 0; (counter0 <recordsArrayMap0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Map<CharSequence, IndexedRecord> map0 = null;
+                map0 = ((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMap0).get(counter0);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(map0);
+                }
+                (encoder).writeMapStart();
+                if ((map0 == null)||map0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(map0 .size());
+                    for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) map0).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        IndexedRecord union0 = null;
+                        union0 = ((Map<CharSequence, IndexedRecord> ) map0).get(key0);
+                        if (union0 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union0), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        (encoder).writeArrayEnd();
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(data, (encoder), (customization));
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArray0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(recordsMapArray0);
+        }
+        (encoder).writeMapStart();
+        if ((recordsMapArray0 == null)||recordsMapArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(recordsMapArray0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                List<IndexedRecord> array0 = null;
+                array0 = ((Map<CharSequence, List<IndexedRecord>> ) recordsMapArray0).get(key1);
+                (encoder).writeArrayStart();
+                if ((array0 == null)||array0 .isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(array0 .size());
+                    for (int counter1 = 0; (counter1 <array0 .size()); counter1 ++) {
+                        (encoder).startItem();
+                        IndexedRecord union1 = null;
+                        union1 = ((List<IndexedRecord> ) array0).get(counter1);
+                        if (union1 == null) {
+                            (encoder).writeIndex(0);
+                            (encoder).writeNull();
+                        } else {
+                            if ((union1 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union1).getSchema().getFullName())) {
+                                (encoder).writeIndex(1);
+                                serializeSubRecord0(((IndexedRecord) union1), (encoder), (customization));
+                            }
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        (encoder).writeMapEnd();
+        List<Map<CharSequence, IndexedRecord>> recordsArrayMapUnion0 = ((List<Map<CharSequence, IndexedRecord>> ) data.get(2));
+        if (recordsArrayMapUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsArrayMapUnion0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0) == null)||((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size());
+                    for (int counter2 = 0; (counter2 <((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0).size()); counter2 ++) {
+                        (encoder).startItem();
+                        Map<CharSequence, IndexedRecord> map1 = null;
+                        map1 = ((List<Map<CharSequence, IndexedRecord>> )((List<Map<CharSequence, IndexedRecord>> ) recordsArrayMapUnion0)).get(counter2);
+                        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                            (customization).getCheckMapTypeFunction().apply(map1);
+                        }
+                        (encoder).writeMapStart();
+                        if ((map1 == null)||map1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(map1 .size());
+                            for (CharSequence key2 : ((Map<CharSequence, IndexedRecord> ) map1).keySet()) {
+                                (encoder).startItem();
+                                (encoder).writeString(key2);
+                                IndexedRecord union2 = null;
+                                union2 = ((Map<CharSequence, IndexedRecord> ) map1).get(key2);
+                                if (union2 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union2 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union2).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union2), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeMapEnd();
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordComplexCollectionsField1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, List<IndexedRecord>> recordsMapArrayUnion0 = ((Map<CharSequence, List<IndexedRecord>> ) data.get(3));
+        if (recordsMapArrayUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (recordsMapArrayUnion0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0) == null)||((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0).size());
+                    for (CharSequence key3 : ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key3);
+                        List<IndexedRecord> array1 = null;
+                        array1 = ((Map<CharSequence, List<IndexedRecord>> )((Map<CharSequence, List<IndexedRecord>> ) recordsMapArrayUnion0)).get(key3);
+                        (encoder).writeArrayStart();
+                        if ((array1 == null)||array1 .isEmpty()) {
+                            (encoder).setItemCount(0);
+                        } else {
+                            (encoder).setItemCount(array1 .size());
+                            for (int counter3 = 0; (counter3 <array1 .size()); counter3 ++) {
+                                (encoder).startItem();
+                                IndexedRecord union3 = null;
+                                union3 = ((List<IndexedRecord> ) array1).get(counter3);
+                                if (union3 == null) {
+                                    (encoder).writeIndex(0);
+                                    (encoder).writeNull();
+                                } else {
+                                    if ((union3 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) union3).getSchema().getFullName())) {
+                                        (encoder).writeIndex(1);
+                                        serializeSubRecord0(((IndexedRecord) union3), (encoder), (customization));
+                                    }
+                                }
+                            }
+                        }
+                        (encoder).writeArrayEnd();
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
new file mode 100644
index 000000000..d8465c6d9
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027.java
@@ -0,0 +1,77 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastGenericSerializerGeneratorTest_shouldWriteSubRecordField_GenericSerializer_652769027
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record0 = ((IndexedRecord) data.get(0));
+        if (record0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if ((record0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.subRecord".equals(((IndexedRecord) record0).getSchema().getFullName())) {
+                (encoder).writeIndex(1);
+                serializeSubRecord0(((IndexedRecord) record0), (encoder), (customization));
+            }
+        }
+        serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeSubRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence subField0 = ((CharSequence) data.get(0));
+        if (subField0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) subField0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) subField0)));
+            } else {
+                (encoder).writeString(((CharSequence) subField0).toString());
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastGenericSerializerGeneratorTest_shouldWriteSubRecordField0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        IndexedRecord record10 = ((IndexedRecord) data.get(1));
+        serializeSubRecord0(record10, (encoder), (customization));
+        CharSequence field0 = ((CharSequence) data.get(2));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeEnums_GenericSerializer_957378572.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeEnums_GenericSerializer_957378572.java
new file mode 100644
index 000000000..f1708b379
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeEnums_GenericSerializer_957378572.java
@@ -0,0 +1,95 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericEnumSymbol;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeEnums_GenericSerializer_957378572
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        int valueToWrite0;
+        Object enumValue0 = data.get(0);
+        if (enumValue0 instanceof Enum) {
+            valueToWrite0 = ((Enum) enumValue0).ordinal();
+        } else {
+            valueToWrite0 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue0).toString());
+        }
+        (encoder).writeEnum(valueToWrite0);
+        serialize_FastSerdeEnums0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeEnums0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericEnumSymbol> arrayOfEnums0 = ((List<GenericEnumSymbol> ) data.get(1));
+        if (arrayOfEnums0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfEnums0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericEnumSymbol> ) arrayOfEnums0) == null)||((List<GenericEnumSymbol> ) arrayOfEnums0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericEnumSymbol> ) arrayOfEnums0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericEnumSymbol> ) arrayOfEnums0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        int valueToWrite1;
+                        Object enumValue1 = ((List<GenericEnumSymbol> ) arrayOfEnums0).get(counter0);
+                        if (enumValue1 instanceof Enum) {
+                            valueToWrite1 = ((Enum) enumValue1).ordinal();
+                        } else {
+                            valueToWrite1 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue1).toString());
+                        }
+                        (encoder).writeEnum(valueToWrite1);
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericEnumSymbol> mapOfEnums0 = ((Map<CharSequence, GenericEnumSymbol> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfEnums0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfEnums0 == null)||mapOfEnums0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfEnums0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericEnumSymbol> ) mapOfEnums0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                int valueToWrite2;
+                Object enumValue2 = mapOfEnums0 .get(key0);
+                if (enumValue2 instanceof Enum) {
+                    valueToWrite2 = ((Enum) enumValue2).ordinal();
+                } else {
+                    valueToWrite2 = ((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).getSchema().getEnumOrdinal(((org.apache.avro.generic.GenericData.EnumSymbol) enumValue2).toString());
+                }
+                (encoder).writeEnum(valueToWrite2);
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeFixed_GenericSerializer_504108934.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeFixed_GenericSerializer_504108934.java
new file mode 100644
index 000000000..791de0b60
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeFixed_GenericSerializer_504108934.java
@@ -0,0 +1,74 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.GenericFixed;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeFixed_GenericSerializer_504108934
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeFixed(((GenericFixed) data.get(0)).bytes());
+        serialize_FastSerdeFixed0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeFixed0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<GenericFixed> arrayOfFixed0 = ((List<GenericFixed> ) data.get(1));
+        if (arrayOfFixed0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (arrayOfFixed0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<GenericFixed> ) arrayOfFixed0) == null)||((List<GenericFixed> ) arrayOfFixed0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<GenericFixed> ) arrayOfFixed0).size());
+                    for (int counter0 = 0; (counter0 <((List<GenericFixed> ) arrayOfFixed0).size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFixed(((GenericFixed)((List<GenericFixed> ) arrayOfFixed0).get(counter0)).bytes());
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        Map<CharSequence, GenericFixed> mapOfFixed0 = ((Map<CharSequence, GenericFixed> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfFixed0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfFixed0 == null)||mapOfFixed0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfFixed0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, GenericFixed> ) mapOfFixed0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                (encoder).writeFixed(((GenericFixed) mapOfFixed0 .get(key0)).bytes());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java
new file mode 100644
index 000000000..fe53ba97e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesDefined_GenericSerializer_229156053.java
@@ -0,0 +1,80 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeLogicalTypesDefined_GenericSerializer_229156053
+    implements FastSerializer<IndexedRecord>
+{
+
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesDefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue0 = data.get(0);
+        convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+        (encoder).writeInt(((Integer) convertedValue0));
+        serialize_FastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesDefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue1 = data.get(1);
+        convertedValue1 = Conversions.convertToRawType(convertedValue1, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+        (encoder).writeInt(((Integer) convertedValue1));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = ((List<Object> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((arrayOfUnionOfDateAndTimestampMillis0 == null)||arrayOfUnionOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfUnionOfDateAndTimestampMillis0 .size());
+            for (int counter0 = 0; (counter0 <arrayOfUnionOfDateAndTimestampMillis0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Object union0 = null;
+                union0 = ((List<Object> ) arrayOfUnionOfDateAndTimestampMillis0).get(counter0);
+                if (union0 instanceof LocalDate) {
+                    (encoder).writeIndex(0);
+                    Object convertedValue2 = union0;
+                    convertedValue2 = Conversions.convertToRawType(convertedValue2, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue2));
+                } else {
+                    if (union0 instanceof Instant) {
+                        (encoder).writeIndex(1);
+                        Object convertedValue3 = union0;
+                        convertedValue3 = Conversions.convertToRawType(convertedValue3, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                        (encoder).writeLong(((Long) convertedValue3));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java
new file mode 100644
index 000000000..3b1d12908
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesDefined_SpecificSerializer_229156053.java
@@ -0,0 +1,80 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesDefined;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeLogicalTypesDefined_SpecificSerializer_229156053
+    implements FastSerializer<FastSerdeLogicalTypesDefined>
+{
+
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+
+    public void serialize(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesDefined0(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue0 = data.get(0);
+        convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+        (encoder).writeInt(((Integer) convertedValue0));
+        serialize_FastSerdeLogicalTypesDefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesDefined0(FastSerdeLogicalTypesDefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue1 = data.get(1);
+        convertedValue1 = Conversions.convertToRawType(convertedValue1, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+        (encoder).writeInt(((Integer) convertedValue1));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = ((List<Object> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((arrayOfUnionOfDateAndTimestampMillis0 == null)||arrayOfUnionOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfUnionOfDateAndTimestampMillis0 .size());
+            for (int counter0 = 0; (counter0 <arrayOfUnionOfDateAndTimestampMillis0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Object union0 = null;
+                union0 = ((List<Object> ) arrayOfUnionOfDateAndTimestampMillis0).get(counter0);
+                if (union0 instanceof LocalDate) {
+                    (encoder).writeIndex(0);
+                    Object convertedValue2 = union0;
+                    convertedValue2 = Conversions.convertToRawType(convertedValue2, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue2));
+                } else {
+                    if (union0 instanceof Instant) {
+                        (encoder).writeIndex(1);
+                        Object convertedValue3 = union0;
+                        convertedValue3 = Conversions.convertToRawType(convertedValue3, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                        (encoder).writeLong(((Long) convertedValue3));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java
new file mode 100644
index 000000000..e8dac41b7
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesTest1_GenericSerializer_1007574890.java
@@ -0,0 +1,341 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastSerdeLogicalTypesTest1_GenericSerializer_1007574890
+    implements FastSerializer<IndexedRecord>
+{
+
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+    private final Schema logicalTypeSchema_120893213 = Schema.parse("{\"type\":\"bytes\",\"logicalType\":\"decimal\",\"precision\":4,\"scale\":2}");
+    private final Schema logicalTypeSchema__1252781617 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-micros\"}");
+    private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesTest10(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesTest10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfArrayAndMap0 = ((Object) data.get(0));
+        if (unionOfArrayAndMap0 instanceof List) {
+            (encoder).writeIndex(0);
+            (encoder).writeArrayStart();
+            if ((((List<LocalTime> ) unionOfArrayAndMap0) == null)||((List<LocalTime> ) unionOfArrayAndMap0).isEmpty()) {
+                (encoder).setItemCount(0);
+            } else {
+                (encoder).setItemCount(((List<LocalTime> ) unionOfArrayAndMap0).size());
+                Object array0 = ((List<LocalTime> ) unionOfArrayAndMap0);
+                if (array0 instanceof PrimitiveIntList) {
+                    PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        Object convertedValue0 = primitiveList0 .getPrimitive(counter0);
+                        convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+                        (encoder).writeInt(((Integer) convertedValue0));
+                    }
+                } else {
+                    for (int counter1 = 0; (counter1 <((List<LocalTime> ) unionOfArrayAndMap0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        Object convertedValue1 = ((List<LocalTime> ) unionOfArrayAndMap0).get(counter1);
+                        convertedValue1 = Conversions.convertToRawType(convertedValue1, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+                        (encoder).writeInt(((Integer) convertedValue1));
+                    }
+                }
+            }
+            (encoder).writeArrayEnd();
+        } else {
+            if (unionOfArrayAndMap0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0) == null)||((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).size());
+                    for (CharSequence key0 : ((Map<CharSequence, LocalDate> )((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        Object convertedValue2 = ((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).get(key0);
+                        convertedValue2 = Conversions.convertToRawType(convertedValue2, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                        (encoder).writeInt(((Integer) convertedValue2));
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        serialize_FastSerdeLogicalTypesTest10(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest11(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest12(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest13(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest14(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest15(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest10(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, Object> mapOfUnionsOfDateAndTimestampMillis0 = ((Map<CharSequence, Object> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfUnionsOfDateAndTimestampMillis0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfUnionsOfDateAndTimestampMillis0 == null)||mapOfUnionsOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfUnionsOfDateAndTimestampMillis0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, Object> ) mapOfUnionsOfDateAndTimestampMillis0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                Object union0 = null;
+                union0 = ((Map<CharSequence, Object> ) mapOfUnionsOfDateAndTimestampMillis0).get(key1);
+                if (union0 instanceof LocalDate) {
+                    (encoder).writeIndex(0);
+                    Object convertedValue3 = union0;
+                    convertedValue3 = Conversions.convertToRawType(convertedValue3, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue3));
+                } else {
+                    if (union0 instanceof Instant) {
+                        (encoder).writeIndex(1);
+                        Object convertedValue4 = union0;
+                        convertedValue4 = Conversions.convertToRawType(convertedValue4, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                        (encoder).writeLong(((Long) convertedValue4));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+        Map<CharSequence, Instant> timestampMillisMap0 = ((Map<CharSequence, Instant> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(timestampMillisMap0);
+        }
+        (encoder).writeMapStart();
+        if ((timestampMillisMap0 == null)||timestampMillisMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(timestampMillisMap0 .size());
+            for (CharSequence key2 : ((Map<CharSequence, Instant> ) timestampMillisMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key2);
+                Object convertedValue5 = timestampMillisMap0 .get(key2);
+                convertedValue5 = Conversions.convertToRawType(convertedValue5, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                (encoder).writeLong(((Long) convertedValue5));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest11(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<LocalDate> nullableArrayOfDates0 = ((List<LocalDate> ) data.get(3));
+        if (nullableArrayOfDates0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullableArrayOfDates0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<LocalDate> ) nullableArrayOfDates0) == null)||((List<LocalDate> ) nullableArrayOfDates0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<LocalDate> ) nullableArrayOfDates0).size());
+                    Object array1 = ((List<LocalDate> ) nullableArrayOfDates0);
+                    if (array1 instanceof PrimitiveIntList) {
+                        PrimitiveIntList primitiveList1 = ((PrimitiveIntList) array1);
+                        for (int counter2 = 0; (counter2 <primitiveList1 .size()); counter2 ++) {
+                            (encoder).startItem();
+                            Object convertedValue6 = primitiveList1 .getPrimitive(counter2);
+                            convertedValue6 = Conversions.convertToRawType(convertedValue6, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                            (encoder).writeInt(((Integer) convertedValue6));
+                        }
+                    } else {
+                        for (int counter3 = 0; (counter3 <((List<LocalDate> ) nullableArrayOfDates0).size()); counter3 ++) {
+                            (encoder).startItem();
+                            Object convertedValue7 = ((List<LocalDate> ) nullableArrayOfDates0).get(counter3);
+                            convertedValue7 = Conversions.convertToRawType(convertedValue7, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                            (encoder).writeInt(((Integer) convertedValue7));
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        List<LocalDate> arrayOfDates0 = ((List<LocalDate> ) data.get(4));
+        (encoder).writeArrayStart();
+        if ((arrayOfDates0 == null)||arrayOfDates0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfDates0 .size());
+            Object array2 = arrayOfDates0;
+            if (array2 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList2 = ((PrimitiveIntList) array2);
+                for (int counter4 = 0; (counter4 <primitiveList2 .size()); counter4 ++) {
+                    (encoder).startItem();
+                    Object convertedValue8 = primitiveList2 .getPrimitive(counter4);
+                    convertedValue8 = Conversions.convertToRawType(convertedValue8, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue8));
+                }
+            } else {
+                for (int counter5 = 0; (counter5 <arrayOfDates0 .size()); counter5 ++) {
+                    (encoder).startItem();
+                    Object convertedValue9 = arrayOfDates0 .get(counter5);
+                    convertedValue9 = Conversions.convertToRawType(convertedValue9, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue9));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest12(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfDecimalOrDate0 = ((Object) data.get(5));
+        if (unionOfDecimalOrDate0 instanceof BigDecimal) {
+            (encoder).writeIndex(0);
+            Object convertedValue10 = unionOfDecimalOrDate0;
+            convertedValue10 = Conversions.convertToRawType(convertedValue10, this.logicalTypeSchema_120893213, this.logicalTypeSchema_120893213 .getLogicalType(), this.conversion_decimal);
+            (encoder).writeBytes(((ByteBuffer) convertedValue10));
+        } else {
+            if (unionOfDecimalOrDate0 instanceof LocalDate) {
+                (encoder).writeIndex(1);
+                Object convertedValue11 = unionOfDecimalOrDate0;
+                convertedValue11 = Conversions.convertToRawType(convertedValue11, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                (encoder).writeInt(((Integer) convertedValue11));
+            }
+        }
+        if (((CharSequence) data.get(6)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(6))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(6)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest13(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue12 = data.get(7);
+        convertedValue12 = Conversions.convertToRawType(convertedValue12, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+        (encoder).writeLong(((Long) convertedValue12));
+        Object convertedValue13 = data.get(8);
+        convertedValue13 = Conversions.convertToRawType(convertedValue13, this.logicalTypeSchema__1252781617, this.logicalTypeSchema__1252781617 .getLogicalType(), this.conversion_timestamp_micros);
+        (encoder).writeLong(((Long) convertedValue13));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest14(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue14 = data.get(9);
+        convertedValue14 = Conversions.convertToRawType(convertedValue14, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+        (encoder).writeInt(((Integer) convertedValue14));
+        Object convertedValue15 = data.get(10);
+        convertedValue15 = Conversions.convertToRawType(convertedValue15, this.logicalTypeSchema__1515894331, this.logicalTypeSchema__1515894331 .getLogicalType(), this.conversion_time_micros);
+        (encoder).writeLong(((Long) convertedValue15));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest15(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue16 = data.get(11);
+        convertedValue16 = Conversions.convertToRawType(convertedValue16, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+        (encoder).writeInt(((Integer) convertedValue16));
+        IndexedRecord nestedLocalTimestampMillis0 = ((IndexedRecord) data.get(12));
+        serializeLocalTimestampRecord0(nestedLocalTimestampMillis0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeLocalTimestampRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(0)));
+        serialize_LocalTimestampRecord0(data, (encoder), (customization));
+        serialize_LocalTimestampRecord1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Long nullableNestedTimestamp0 = ((Long) data.get(1));
+        if (nullableNestedTimestamp0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) nullableNestedTimestamp0));
+        }
+        Object nullableUnionOfDateAndLocalTimestamp0 = ((Object) data.get(2));
+        if (nullableUnionOfDateAndLocalTimestamp0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullableUnionOfDateAndLocalTimestamp0 instanceof LocalDate) {
+                (encoder).writeIndex(1);
+                Object convertedValue17 = nullableUnionOfDateAndLocalTimestamp0;
+                convertedValue17 = Conversions.convertToRawType(convertedValue17, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                (encoder).writeInt(((Integer) convertedValue17));
+            } else {
+                if (nullableUnionOfDateAndLocalTimestamp0 instanceof Long) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeLong(((Long) nullableUnionOfDateAndLocalTimestamp0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfDateAndLocalTimestamp0 = ((Object) data.get(3));
+        if (unionOfDateAndLocalTimestamp0 instanceof LocalDate) {
+            (encoder).writeIndex(0);
+            Object convertedValue18 = unionOfDateAndLocalTimestamp0;
+            convertedValue18 = Conversions.convertToRawType(convertedValue18, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+            (encoder).writeInt(((Integer) convertedValue18));
+        } else {
+            if (unionOfDateAndLocalTimestamp0 instanceof Long) {
+                (encoder).writeIndex(1);
+                (encoder).writeLong(((Long) unionOfDateAndLocalTimestamp0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java
new file mode 100644
index 000000000..6734edb5e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890.java
@@ -0,0 +1,342 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.api.PrimitiveIntList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesTest1;
+import com.linkedin.avro.fastserde.generated.avro.LocalTimestampRecord;
+import org.apache.avro.Conversions;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastSerdeLogicalTypesTest1_SpecificSerializer_1007574890
+    implements FastSerializer<FastSerdeLogicalTypesTest1>
+{
+
+    private final org.apache.avro.data.TimeConversions.DateConversion conversion_date = new org.apache.avro.data.TimeConversions.DateConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimeMillisConversion conversion_time_millis = new org.apache.avro.data.TimeConversions.TimeMillisConversion();
+    private final Conversions.DecimalConversion conversion_decimal = new Conversions.DecimalConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMillisConversion conversion_timestamp_millis = new org.apache.avro.data.TimeConversions.TimestampMillisConversion();
+    private final Schema logicalTypeSchema__419105534 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"time-millis\"}");
+    private final Schema logicalTypeSchema__59052268 = Schema.parse("{\"type\":\"int\",\"logicalType\":\"date\"}");
+    private final Schema logicalTypeSchema_1074306973 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-millis\"}");
+    private final Schema logicalTypeSchema_120893213 = Schema.parse("{\"type\":\"bytes\",\"logicalType\":\"decimal\",\"precision\":4,\"scale\":2}");
+    private final Schema logicalTypeSchema__1252781617 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"timestamp-micros\"}");
+    private final Schema logicalTypeSchema__1515894331 = Schema.parse("{\"type\":\"long\",\"logicalType\":\"time-micros\"}");
+
+    public void serialize(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesTest10(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfArrayAndMap0 = ((Object) data.get(0));
+        if (unionOfArrayAndMap0 instanceof List) {
+            (encoder).writeIndex(0);
+            (encoder).writeArrayStart();
+            if ((((List<LocalTime> ) unionOfArrayAndMap0) == null)||((List<LocalTime> ) unionOfArrayAndMap0).isEmpty()) {
+                (encoder).setItemCount(0);
+            } else {
+                (encoder).setItemCount(((List<LocalTime> ) unionOfArrayAndMap0).size());
+                Object array0 = ((List<LocalTime> ) unionOfArrayAndMap0);
+                if (array0 instanceof PrimitiveIntList) {
+                    PrimitiveIntList primitiveList0 = ((PrimitiveIntList) array0);
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        Object convertedValue0 = primitiveList0 .getPrimitive(counter0);
+                        convertedValue0 = Conversions.convertToRawType(convertedValue0, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+                        (encoder).writeInt(((Integer) convertedValue0));
+                    }
+                } else {
+                    for (int counter1 = 0; (counter1 <((List<LocalTime> ) unionOfArrayAndMap0).size()); counter1 ++) {
+                        (encoder).startItem();
+                        Object convertedValue1 = ((List<LocalTime> ) unionOfArrayAndMap0).get(counter1);
+                        convertedValue1 = Conversions.convertToRawType(convertedValue1, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+                        (encoder).writeInt(((Integer) convertedValue1));
+                    }
+                }
+            }
+            (encoder).writeArrayEnd();
+        } else {
+            if (unionOfArrayAndMap0 instanceof Map) {
+                (encoder).writeIndex(1);
+                if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+                    (customization).getCheckMapTypeFunction().apply(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0));
+                }
+                (encoder).writeMapStart();
+                if ((((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0) == null)||((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).size());
+                    for (CharSequence key0 : ((Map<CharSequence, LocalDate> )((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0)).keySet()) {
+                        (encoder).startItem();
+                        (encoder).writeString(key0);
+                        Object convertedValue2 = ((Map<CharSequence, LocalDate> ) unionOfArrayAndMap0).get(key0);
+                        convertedValue2 = Conversions.convertToRawType(convertedValue2, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                        (encoder).writeInt(((Integer) convertedValue2));
+                    }
+                }
+                (encoder).writeMapEnd();
+            }
+        }
+        serialize_FastSerdeLogicalTypesTest10(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest11(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest12(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest13(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest14(data, (encoder), (customization));
+        serialize_FastSerdeLogicalTypesTest15(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest10(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, Object> mapOfUnionsOfDateAndTimestampMillis0 = ((Map<CharSequence, Object> ) data.get(1));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(mapOfUnionsOfDateAndTimestampMillis0);
+        }
+        (encoder).writeMapStart();
+        if ((mapOfUnionsOfDateAndTimestampMillis0 == null)||mapOfUnionsOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(mapOfUnionsOfDateAndTimestampMillis0 .size());
+            for (CharSequence key1 : ((Map<CharSequence, Object> ) mapOfUnionsOfDateAndTimestampMillis0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key1);
+                Object union0 = null;
+                union0 = ((Map<CharSequence, Object> ) mapOfUnionsOfDateAndTimestampMillis0).get(key1);
+                if (union0 instanceof LocalDate) {
+                    (encoder).writeIndex(0);
+                    Object convertedValue3 = union0;
+                    convertedValue3 = Conversions.convertToRawType(convertedValue3, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue3));
+                } else {
+                    if (union0 instanceof Instant) {
+                        (encoder).writeIndex(1);
+                        Object convertedValue4 = union0;
+                        convertedValue4 = Conversions.convertToRawType(convertedValue4, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                        (encoder).writeLong(((Long) convertedValue4));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+        Map<CharSequence, Instant> timestampMillisMap0 = ((Map<CharSequence, Instant> ) data.get(2));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(timestampMillisMap0);
+        }
+        (encoder).writeMapStart();
+        if ((timestampMillisMap0 == null)||timestampMillisMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(timestampMillisMap0 .size());
+            for (CharSequence key2 : ((Map<CharSequence, Instant> ) timestampMillisMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key2);
+                Object convertedValue5 = timestampMillisMap0 .get(key2);
+                convertedValue5 = Conversions.convertToRawType(convertedValue5, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+                (encoder).writeLong(((Long) convertedValue5));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest11(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<LocalDate> nullableArrayOfDates0 = ((List<LocalDate> ) data.get(3));
+        if (nullableArrayOfDates0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullableArrayOfDates0 instanceof List) {
+                (encoder).writeIndex(1);
+                (encoder).writeArrayStart();
+                if ((((List<LocalDate> ) nullableArrayOfDates0) == null)||((List<LocalDate> ) nullableArrayOfDates0).isEmpty()) {
+                    (encoder).setItemCount(0);
+                } else {
+                    (encoder).setItemCount(((List<LocalDate> ) nullableArrayOfDates0).size());
+                    Object array1 = ((List<LocalDate> ) nullableArrayOfDates0);
+                    if (array1 instanceof PrimitiveIntList) {
+                        PrimitiveIntList primitiveList1 = ((PrimitiveIntList) array1);
+                        for (int counter2 = 0; (counter2 <primitiveList1 .size()); counter2 ++) {
+                            (encoder).startItem();
+                            Object convertedValue6 = primitiveList1 .getPrimitive(counter2);
+                            convertedValue6 = Conversions.convertToRawType(convertedValue6, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                            (encoder).writeInt(((Integer) convertedValue6));
+                        }
+                    } else {
+                        for (int counter3 = 0; (counter3 <((List<LocalDate> ) nullableArrayOfDates0).size()); counter3 ++) {
+                            (encoder).startItem();
+                            Object convertedValue7 = ((List<LocalDate> ) nullableArrayOfDates0).get(counter3);
+                            convertedValue7 = Conversions.convertToRawType(convertedValue7, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                            (encoder).writeInt(((Integer) convertedValue7));
+                        }
+                    }
+                }
+                (encoder).writeArrayEnd();
+            }
+        }
+        List<LocalDate> arrayOfDates0 = ((List<LocalDate> ) data.get(4));
+        (encoder).writeArrayStart();
+        if ((arrayOfDates0 == null)||arrayOfDates0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfDates0 .size());
+            Object array2 = arrayOfDates0;
+            if (array2 instanceof PrimitiveIntList) {
+                PrimitiveIntList primitiveList2 = ((PrimitiveIntList) array2);
+                for (int counter4 = 0; (counter4 <primitiveList2 .size()); counter4 ++) {
+                    (encoder).startItem();
+                    Object convertedValue8 = primitiveList2 .getPrimitive(counter4);
+                    convertedValue8 = Conversions.convertToRawType(convertedValue8, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue8));
+                }
+            } else {
+                for (int counter5 = 0; (counter5 <arrayOfDates0 .size()); counter5 ++) {
+                    (encoder).startItem();
+                    Object convertedValue9 = arrayOfDates0 .get(counter5);
+                    convertedValue9 = Conversions.convertToRawType(convertedValue9, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                    (encoder).writeInt(((Integer) convertedValue9));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest12(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfDecimalOrDate0 = ((Object) data.get(5));
+        if (unionOfDecimalOrDate0 instanceof BigDecimal) {
+            (encoder).writeIndex(0);
+            Object convertedValue10 = unionOfDecimalOrDate0;
+            convertedValue10 = Conversions.convertToRawType(convertedValue10, this.logicalTypeSchema_120893213, this.logicalTypeSchema_120893213 .getLogicalType(), this.conversion_decimal);
+            (encoder).writeBytes(((ByteBuffer) convertedValue10));
+        } else {
+            if (unionOfDecimalOrDate0 instanceof LocalDate) {
+                (encoder).writeIndex(1);
+                Object convertedValue11 = unionOfDecimalOrDate0;
+                convertedValue11 = Conversions.convertToRawType(convertedValue11, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                (encoder).writeInt(((Integer) convertedValue11));
+            }
+        }
+        if (((CharSequence) data.get(6)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(6))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(6)).toString());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest13(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue12 = data.get(7);
+        convertedValue12 = Conversions.convertToRawType(convertedValue12, this.logicalTypeSchema_1074306973, this.logicalTypeSchema_1074306973 .getLogicalType(), this.conversion_timestamp_millis);
+        (encoder).writeLong(((Long) convertedValue12));
+        Object convertedValue13 = data.get(8);
+        convertedValue13 = Conversions.convertToRawType(convertedValue13, this.logicalTypeSchema__1252781617, this.logicalTypeSchema__1252781617 .getLogicalType(), this.conversion_timestamp_micros);
+        (encoder).writeLong(((Long) convertedValue13));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest14(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue14 = data.get(9);
+        convertedValue14 = Conversions.convertToRawType(convertedValue14, this.logicalTypeSchema__419105534, this.logicalTypeSchema__419105534 .getLogicalType(), this.conversion_time_millis);
+        (encoder).writeInt(((Integer) convertedValue14));
+        Object convertedValue15 = data.get(10);
+        convertedValue15 = Conversions.convertToRawType(convertedValue15, this.logicalTypeSchema__1515894331, this.logicalTypeSchema__1515894331 .getLogicalType(), this.conversion_time_micros);
+        (encoder).writeLong(((Long) convertedValue15));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesTest15(FastSerdeLogicalTypesTest1 data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object convertedValue16 = data.get(11);
+        convertedValue16 = Conversions.convertToRawType(convertedValue16, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+        (encoder).writeInt(((Integer) convertedValue16));
+        LocalTimestampRecord nestedLocalTimestampMillis0 = ((LocalTimestampRecord) data.get(12));
+        serializeLocalTimestampRecord0(nestedLocalTimestampMillis0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeLocalTimestampRecord0(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeLong(((Long) data.get(0)));
+        serialize_LocalTimestampRecord0(data, (encoder), (customization));
+        serialize_LocalTimestampRecord1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord0(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Long nullableNestedTimestamp0 = ((Long) data.get(1));
+        if (nullableNestedTimestamp0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeLong(((Long) nullableNestedTimestamp0));
+        }
+        Object nullableUnionOfDateAndLocalTimestamp0 = ((Object) data.get(2));
+        if (nullableUnionOfDateAndLocalTimestamp0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullableUnionOfDateAndLocalTimestamp0 instanceof LocalDate) {
+                (encoder).writeIndex(1);
+                Object convertedValue17 = nullableUnionOfDateAndLocalTimestamp0;
+                convertedValue17 = Conversions.convertToRawType(convertedValue17, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+                (encoder).writeInt(((Integer) convertedValue17));
+            } else {
+                if (nullableUnionOfDateAndLocalTimestamp0 instanceof Long) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeLong(((Long) nullableUnionOfDateAndLocalTimestamp0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_LocalTimestampRecord1(LocalTimestampRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object unionOfDateAndLocalTimestamp0 = ((Object) data.get(3));
+        if (unionOfDateAndLocalTimestamp0 instanceof LocalDate) {
+            (encoder).writeIndex(0);
+            Object convertedValue18 = unionOfDateAndLocalTimestamp0;
+            convertedValue18 = Conversions.convertToRawType(convertedValue18, this.logicalTypeSchema__59052268, this.logicalTypeSchema__59052268 .getLogicalType(), this.conversion_date);
+            (encoder).writeInt(((Integer) convertedValue18));
+        } else {
+            if (unionOfDateAndLocalTimestamp0 instanceof Long) {
+                (encoder).writeIndex(1);
+                (encoder).writeLong(((Long) unionOfDateAndLocalTimestamp0));
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java
new file mode 100644
index 000000000..f0050a843
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeLogicalTypesUndefined_GenericSerializer_1982763418
+    implements FastSerializer<IndexedRecord>
+{
+
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.Conversions.DecimalConversion conversion_decimal = new org.apache.avro.Conversions.DecimalConversion();
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesUndefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesUndefined0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = ((List<Object> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((arrayOfUnionOfDateAndTimestampMillis0 == null)||arrayOfUnionOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfUnionOfDateAndTimestampMillis0 .size());
+            for (int counter0 = 0; (counter0 <arrayOfUnionOfDateAndTimestampMillis0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Object union0 = null;
+                union0 = ((List<Object> ) arrayOfUnionOfDateAndTimestampMillis0).get(counter0);
+                if (union0 instanceof Integer) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeInt(((Integer) union0));
+                } else {
+                    if (union0 instanceof Long) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeLong(((Long) union0));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java
new file mode 100644
index 000000000..1fcd0d0d5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418.java
@@ -0,0 +1,62 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.FastSerdeLogicalTypesUndefined;
+import org.apache.avro.io.Encoder;
+
+public class FastSerdeLogicalTypesUndefined_SpecificSerializer_1982763418
+    implements FastSerializer<FastSerdeLogicalTypesUndefined>
+{
+
+    private final org.apache.avro.data.TimeConversions.TimeMicrosConversion conversion_time_micros = new org.apache.avro.data.TimeConversions.TimeMicrosConversion();
+    private final org.apache.avro.data.TimeConversions.TimestampMicrosConversion conversion_timestamp_micros = new org.apache.avro.data.TimeConversions.TimestampMicrosConversion();
+    private final org.apache.avro.Conversions.DecimalConversion conversion_decimal = new org.apache.avro.Conversions.DecimalConversion();
+
+    public void serialize(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastSerdeLogicalTypesUndefined0(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(0)));
+        serialize_FastSerdeLogicalTypesUndefined0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastSerdeLogicalTypesUndefined0(FastSerdeLogicalTypesUndefined data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeInt(((Integer) data.get(1)));
+        List<Object> arrayOfUnionOfDateAndTimestampMillis0 = ((List<Object> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((arrayOfUnionOfDateAndTimestampMillis0 == null)||arrayOfUnionOfDateAndTimestampMillis0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(arrayOfUnionOfDateAndTimestampMillis0 .size());
+            for (int counter0 = 0; (counter0 <arrayOfUnionOfDateAndTimestampMillis0 .size()); counter0 ++) {
+                (encoder).startItem();
+                Object union0 = null;
+                union0 = ((List<Object> ) arrayOfUnionOfDateAndTimestampMillis0).get(counter0);
+                if (union0 instanceof Integer) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeInt(((Integer) union0));
+                } else {
+                    if (union0 instanceof Long) {
+                        (encoder).writeIndex(1);
+                        (encoder).writeLong(((Long) union0));
+                    }
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
new file mode 100644
index 000000000..21c4255aa
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyInReaderSchemaTest_GenericSerializer_205569
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyInReaderSchemaTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
new file mode 100644
index 000000000..7519c0d80
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985.java
@@ -0,0 +1,97 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class FastStringableTest_javaStringPropertyTest_GenericSerializer_1110978985
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeFastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeFastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((CharSequence) data.get(0)) instanceof Utf8) {
+            (encoder).writeString(((Utf8)((CharSequence) data.get(0))));
+        } else {
+            (encoder).writeString(((CharSequence) data.get(0)).toString());
+        }
+        serialize_FastStringableTest_javaStringPropertyTest0(data, (encoder), (customization));
+        serialize_FastStringableTest_javaStringPropertyTest1(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence testUnionString0 = ((CharSequence) data.get(1));
+        if (testUnionString0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) testUnionString0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) testUnionString0)));
+            } else {
+                (encoder).writeString(((CharSequence) testUnionString0).toString());
+            }
+        }
+        List<CharSequence> testStringArray0 = ((List<CharSequence> ) data.get(2));
+        (encoder).writeArrayStart();
+        if ((testStringArray0 == null)||testStringArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringArray0 .size());
+            for (int counter0 = 0; (counter0 <testStringArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                if (testStringArray0 .get(counter0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8) testStringArray0 .get(counter0)));
+                } else {
+                    (encoder).writeString(testStringArray0 .get(counter0).toString());
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_FastStringableTest_javaStringPropertyTest1(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Map<CharSequence, CharSequence> testStringMap0 = ((Map<CharSequence, CharSequence> ) data.get(3));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(testStringMap0);
+        }
+        (encoder).writeMapStart();
+        if ((testStringMap0 == null)||testStringMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(testStringMap0 .size());
+            for (CharSequence key0 : ((Map<CharSequence, CharSequence> ) testStringMap0).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                if (((CharSequence) testStringMap0 .get(key0)) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) testStringMap0 .get(key0))));
+                } else {
+                    (encoder).writeString(((CharSequence) testStringMap0 .get(key0)).toString());
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Map_of_UNION_GenericSerializer_2140000109.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Map_of_UNION_GenericSerializer_2140000109.java
new file mode 100644
index 000000000..1b5d3fa2e
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Map_of_UNION_GenericSerializer_2140000109.java
@@ -0,0 +1,65 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_UNION_GenericSerializer_2140000109
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord union0 = null;
+                union0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                if (union0 == null) {
+                    (encoder).writeIndex(0);
+                    (encoder).writeNull();
+                } else {
+                    if ((union0 instanceof IndexedRecord)&&"com.linkedin.avro.fastserde.generated.avro.record".equals(((IndexedRecord) union0).getSchema().getFullName())) {
+                        (encoder).writeIndex(1);
+                        serializeRecord0(((IndexedRecord) union0), (encoder), (customization));
+                    }
+                }
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Map_of_record_GenericSerializer_1677529043.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Map_of_record_GenericSerializer_1677529043.java
new file mode 100644
index 000000000..a5cb9d794
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/Map_of_record_GenericSerializer_1677529043.java
@@ -0,0 +1,57 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class Map_of_record_GenericSerializer_1677529043
+    implements FastSerializer<Map<CharSequence, IndexedRecord>>
+{
+
+
+    public void serialize(Map<CharSequence, IndexedRecord> data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(data);
+        }
+        (encoder).writeMapStart();
+        if ((data == null)||data.isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(data.size());
+            for (CharSequence key0 : ((Map<CharSequence, IndexedRecord> ) data).keySet()) {
+                (encoder).startItem();
+                (encoder).writeString(key0);
+                IndexedRecord record0 = null;
+                record0 = ((Map<CharSequence, IndexedRecord> ) data).get(key0);
+                serializeRecord0(record0, (encoder), (customization));
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeRecord0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        CharSequence field0 = ((CharSequence) data.get(0));
+        if (field0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            if (((CharSequence) field0) instanceof Utf8) {
+                (encoder).writeString(((Utf8)((CharSequence) field0)));
+            } else {
+                (encoder).writeString(((CharSequence) field0).toString());
+            }
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/StringableRecord_SpecificSerializer_842267318.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/StringableRecord_SpecificSerializer_842267318.java
new file mode 100644
index 000000000..c716c8c9c
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/StringableRecord_SpecificSerializer_842267318.java
@@ -0,0 +1,159 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.URI;
+import java.net.URL;
+import java.util.List;
+import java.util.Map;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import com.linkedin.avro.fastserde.generated.avro.AnotherSubRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableRecord;
+import com.linkedin.avro.fastserde.generated.avro.StringableSubRecord;
+import org.apache.avro.io.Encoder;
+import org.apache.avro.util.Utf8;
+
+public class StringableRecord_SpecificSerializer_842267318
+    implements FastSerializer<StringableRecord>
+{
+
+
+    public void serialize(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeStringableRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigInteger) data.get(0)).toString());
+        serialize_StringableRecord0(data, (encoder), (customization));
+        serialize_StringableRecord1(data, (encoder), (customization));
+        serialize_StringableRecord2(data, (encoder), (customization));
+        serialize_StringableRecord3(data, (encoder), (customization));
+        serialize_StringableRecord4(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord0(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((BigDecimal) data.get(1)).toString());
+        (encoder).writeString(((URI) data.get(2)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord1(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URL) data.get(3)).toString());
+        (encoder).writeString(((File) data.get(4)).toString());
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord2(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<URL> urlArray0 = ((List<URL> ) data.get(5));
+        (encoder).writeArrayStart();
+        if ((urlArray0 == null)||urlArray0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlArray0 .size());
+            for (int counter0 = 0; (counter0 <urlArray0 .size()); counter0 ++) {
+                (encoder).startItem();
+                (encoder).writeString(urlArray0 .get(counter0).toString());
+            }
+        }
+        (encoder).writeArrayEnd();
+        Map<URL, BigInteger> urlMap0 = ((Map<URL, BigInteger> ) data.get(6));
+        if (((customization)!= null)&&((customization).getCheckMapTypeFunction()!= null)) {
+            (customization).getCheckMapTypeFunction().apply(urlMap0);
+        }
+        (encoder).writeMapStart();
+        if ((urlMap0 == null)||urlMap0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(urlMap0 .size());
+            for (URL key0 : ((Map<URL, BigInteger> ) urlMap0).keySet()) {
+                (encoder).startItem();
+                String keyString0 = key0 .toString();
+                (encoder).writeString(keyString0);
+                (encoder).writeString(((BigInteger) urlMap0 .get(key0)).toString());
+            }
+        }
+        (encoder).writeMapEnd();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord3(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord0 = ((StringableSubRecord) data.get(7));
+        serializeStringableSubRecord0(subRecord0, (encoder), (customization));
+        AnotherSubRecord subRecordWithSubRecord0 = ((AnotherSubRecord) data.get(8));
+        serializeAnotherSubRecord0(subRecordWithSubRecord0, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeStringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        (encoder).writeString(((URI) data.get(0)).toString());
+        serialize_StringableSubRecord0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableSubRecord0(StringableSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        Object nullStringIntUnion0 = ((Object) data.get(1));
+        if (nullStringIntUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            if (nullStringIntUnion0 instanceof CharSequence) {
+                (encoder).writeIndex(1);
+                if (((CharSequence) nullStringIntUnion0) instanceof Utf8) {
+                    (encoder).writeString(((Utf8)((CharSequence) nullStringIntUnion0)));
+                } else {
+                    (encoder).writeString(((CharSequence) nullStringIntUnion0).toString());
+                }
+            } else {
+                if (nullStringIntUnion0 instanceof Integer) {
+                    (encoder).writeIndex(2);
+                    (encoder).writeInt(((Integer) nullStringIntUnion0));
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeAnotherSubRecord0(AnotherSubRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        StringableSubRecord subRecord1 = ((StringableSubRecord) data.get(0));
+        serializeStringableSubRecord0(subRecord1, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    private void serialize_StringableRecord4(StringableRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        String stringUnion0 = ((String) data.get(9));
+        if (stringUnion0 == null) {
+            (encoder).writeIndex(0);
+            (encoder).writeNull();
+        } else {
+            (encoder).writeIndex(1);
+            (encoder).writeString(((String) stringUnion0).toString());
+        }
+    }
+
+}
diff --git a/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/TestArrayOfFloats_GenericSerializer_1408566797.java b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/TestArrayOfFloats_GenericSerializer_1408566797.java
new file mode 100644
index 000000000..00818dce5
--- /dev/null
+++ b/fastserde/avro-fastserde-tests19/build/codegen/java/com/linkedin/avro/fastserde/generated/serialization/AVRO_1_9/TestArrayOfFloats_GenericSerializer_1408566797.java
@@ -0,0 +1,56 @@
+
+package com.linkedin.avro.fastserde.generated.serialization.AVRO_1_9;
+
+import java.io.IOException;
+import java.util.List;
+import com.linkedin.avro.api.PrimitiveFloatList;
+import com.linkedin.avro.fastserde.BufferBackedPrimitiveFloatList;
+import com.linkedin.avro.fastserde.FastSerializer;
+import com.linkedin.avro.fastserde.customized.DatumWriterCustomization;
+import org.apache.avro.generic.IndexedRecord;
+import org.apache.avro.io.Encoder;
+
+public class TestArrayOfFloats_GenericSerializer_1408566797
+    implements FastSerializer<IndexedRecord>
+{
+
+
+    public void serialize(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        serializeTestArrayOfFloats0(data, (encoder), (customization));
+    }
+
+    @SuppressWarnings("unchecked")
+    public void serializeTestArrayOfFloats0(IndexedRecord data, Encoder encoder, DatumWriterCustomization customization)
+        throws IOException
+    {
+        List<Float> array_of_float0 = ((List<Float> ) data.get(0));
+        (encoder).writeArrayStart();
+        if ((array_of_float0 == null)||array_of_float0 .isEmpty()) {
+            (encoder).setItemCount(0);
+        } else {
+            (encoder).setItemCount(array_of_float0 .size());
+            Object array0 = array_of_float0;
+            if (array0 instanceof PrimitiveFloatList) {
+                PrimitiveFloatList primitiveList0 = ((PrimitiveFloatList) array0);
+                if (primitiveList0 instanceof BufferBackedPrimitiveFloatList) {
+                    BufferBackedPrimitiveFloatList bufferBackedPrimitiveFloatList = ((BufferBackedPrimitiveFloatList) primitiveList0);
+                    bufferBackedPrimitiveFloatList.writeFloats((encoder));
+                } else {
+                    for (int counter0 = 0; (counter0 <primitiveList0 .size()); counter0 ++) {
+                        (encoder).startItem();
+                        (encoder).writeFloat(primitiveList0 .getPrimitive(counter0));
+                    }
+                }
+            } else {
+                for (int counter1 = 0; (counter1 <array_of_float0 .size()); counter1 ++) {
+                    (encoder).startItem();
+                    (encoder).writeFloat(array_of_float0 .get(counter1));
+                }
+            }
+        }
+        (encoder).writeArrayEnd();
+    }
+
+}